| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
|
* linux/drivers/ide/ide-tape.c Version 1.17c Sep, 2003
|
| 3 |
|
|
*
|
| 4 |
|
|
* Copyright (C) 1995 - 1999 Gadi Oxman <gadio@netvision.net.il>
|
| 5 |
|
|
*
|
| 6 |
|
|
* $Header: /home/marcus/revision_ctrl_test/oc_cvs/cvs/or1k/linux/linux-2.4/drivers/ide/ide-tape.c,v 1.1.1.1 2004-04-15 01:38:53 phoenix Exp $
|
| 7 |
|
|
*
|
| 8 |
|
|
* This driver was constructed as a student project in the software laboratory
|
| 9 |
|
|
* of the faculty of electrical engineering in the Technion - Israel's
|
| 10 |
|
|
* Institute Of Technology, with the guide of Avner Lottem and Dr. Ilana David.
|
| 11 |
|
|
*
|
| 12 |
|
|
* It is hereby placed under the terms of the GNU general public license.
|
| 13 |
|
|
* (See linux/COPYING).
|
| 14 |
|
|
*/
|
| 15 |
|
|
|
| 16 |
|
|
/*
|
| 17 |
|
|
* IDE ATAPI streaming tape driver.
|
| 18 |
|
|
*
|
| 19 |
|
|
* This driver is a part of the Linux ide driver and works in co-operation
|
| 20 |
|
|
* with linux/drivers/block/ide.c.
|
| 21 |
|
|
*
|
| 22 |
|
|
* The driver, in co-operation with ide.c, basically traverses the
|
| 23 |
|
|
* request-list for the block device interface. The character device
|
| 24 |
|
|
* interface, on the other hand, creates new requests, adds them
|
| 25 |
|
|
* to the request-list of the block device, and waits for their completion.
|
| 26 |
|
|
*
|
| 27 |
|
|
* Pipelined operation mode is now supported on both reads and writes.
|
| 28 |
|
|
*
|
| 29 |
|
|
* The block device major and minor numbers are determined from the
|
| 30 |
|
|
* tape's relative position in the ide interfaces, as explained in ide.c.
|
| 31 |
|
|
*
|
| 32 |
|
|
* The character device interface consists of the following devices:
|
| 33 |
|
|
*
|
| 34 |
|
|
* ht0 major 37, minor 0 first IDE tape, rewind on close.
|
| 35 |
|
|
* ht1 major 37, minor 1 second IDE tape, rewind on close.
|
| 36 |
|
|
* ...
|
| 37 |
|
|
* nht0 major 37, minor 128 first IDE tape, no rewind on close.
|
| 38 |
|
|
* nht1 major 37, minor 129 second IDE tape, no rewind on close.
|
| 39 |
|
|
* ...
|
| 40 |
|
|
*
|
| 41 |
|
|
* Run linux/scripts/MAKEDEV.ide to create the above entries.
|
| 42 |
|
|
*
|
| 43 |
|
|
* The general magnetic tape commands compatible interface, as defined by
|
| 44 |
|
|
* include/linux/mtio.h, is accessible through the character device.
|
| 45 |
|
|
*
|
| 46 |
|
|
* General ide driver configuration options, such as the interrupt-unmask
|
| 47 |
|
|
* flag, can be configured by issuing an ioctl to the block device interface,
|
| 48 |
|
|
* as any other ide device.
|
| 49 |
|
|
*
|
| 50 |
|
|
* Our own ide-tape ioctl's can be issued to either the block device or
|
| 51 |
|
|
* the character device interface.
|
| 52 |
|
|
*
|
| 53 |
|
|
* Maximal throughput with minimal bus load will usually be achieved in the
|
| 54 |
|
|
* following scenario:
|
| 55 |
|
|
*
|
| 56 |
|
|
* 1. ide-tape is operating in the pipelined operation mode.
|
| 57 |
|
|
* 2. No buffering is performed by the user backup program.
|
| 58 |
|
|
*
|
| 59 |
|
|
* Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
|
| 60 |
|
|
*
|
| 61 |
|
|
* Ver 0.1 Nov 1 95 Pre-working code :-)
|
| 62 |
|
|
* Ver 0.2 Nov 23 95 A short backup (few megabytes) and restore procedure
|
| 63 |
|
|
* was successful ! (Using tar cvf ... on the block
|
| 64 |
|
|
* device interface).
|
| 65 |
|
|
* A longer backup resulted in major swapping, bad
|
| 66 |
|
|
* overall Linux performance and eventually failed as
|
| 67 |
|
|
* we received non serial read-ahead requests from the
|
| 68 |
|
|
* buffer cache.
|
| 69 |
|
|
* Ver 0.3 Nov 28 95 Long backups are now possible, thanks to the
|
| 70 |
|
|
* character device interface. Linux's responsiveness
|
| 71 |
|
|
* and performance doesn't seem to be much affected
|
| 72 |
|
|
* from the background backup procedure.
|
| 73 |
|
|
* Some general mtio.h magnetic tape operations are
|
| 74 |
|
|
* now supported by our character device. As a result,
|
| 75 |
|
|
* popular tape utilities are starting to work with
|
| 76 |
|
|
* ide tapes :-)
|
| 77 |
|
|
* The following configurations were tested:
|
| 78 |
|
|
* 1. An IDE ATAPI TAPE shares the same interface
|
| 79 |
|
|
* and irq with an IDE ATAPI CDROM.
|
| 80 |
|
|
* 2. An IDE ATAPI TAPE shares the same interface
|
| 81 |
|
|
* and irq with a normal IDE disk.
|
| 82 |
|
|
* Both configurations seemed to work just fine !
|
| 83 |
|
|
* However, to be on the safe side, it is meanwhile
|
| 84 |
|
|
* recommended to give the IDE TAPE its own interface
|
| 85 |
|
|
* and irq.
|
| 86 |
|
|
* The one thing which needs to be done here is to
|
| 87 |
|
|
* add a "request postpone" feature to ide.c,
|
| 88 |
|
|
* so that we won't have to wait for the tape to finish
|
| 89 |
|
|
* performing a long media access (DSC) request (such
|
| 90 |
|
|
* as a rewind) before we can access the other device
|
| 91 |
|
|
* on the same interface. This effect doesn't disturb
|
| 92 |
|
|
* normal operation most of the time because read/write
|
| 93 |
|
|
* requests are relatively fast, and once we are
|
| 94 |
|
|
* performing one tape r/w request, a lot of requests
|
| 95 |
|
|
* from the other device can be queued and ide.c will
|
| 96 |
|
|
* service all of them after this single tape request.
|
| 97 |
|
|
* Ver 1.0 Dec 11 95 Integrated into Linux 1.3.46 development tree.
|
| 98 |
|
|
* On each read / write request, we now ask the drive
|
| 99 |
|
|
* if we can transfer a constant number of bytes
|
| 100 |
|
|
* (a parameter of the drive) only to its buffers,
|
| 101 |
|
|
* without causing actual media access. If we can't,
|
| 102 |
|
|
* we just wait until we can by polling the DSC bit.
|
| 103 |
|
|
* This ensures that while we are not transferring
|
| 104 |
|
|
* more bytes than the constant referred to above, the
|
| 105 |
|
|
* interrupt latency will not become too high and
|
| 106 |
|
|
* we won't cause an interrupt timeout, as happened
|
| 107 |
|
|
* occasionally in the previous version.
|
| 108 |
|
|
* While polling for DSC, the current request is
|
| 109 |
|
|
* postponed and ide.c is free to handle requests from
|
| 110 |
|
|
* the other device. This is handled transparently to
|
| 111 |
|
|
* ide.c. The hwgroup locking method which was used
|
| 112 |
|
|
* in the previous version was removed.
|
| 113 |
|
|
* Use of new general features which are provided by
|
| 114 |
|
|
* ide.c for use with atapi devices.
|
| 115 |
|
|
* (Programming done by Mark Lord)
|
| 116 |
|
|
* Few potential bug fixes (Again, suggested by Mark)
|
| 117 |
|
|
* Single character device data transfers are now
|
| 118 |
|
|
* not limited in size, as they were before.
|
| 119 |
|
|
* We are asking the tape about its recommended
|
| 120 |
|
|
* transfer unit and send a larger data transfer
|
| 121 |
|
|
* as several transfers of the above size.
|
| 122 |
|
|
* For best results, use an integral number of this
|
| 123 |
|
|
* basic unit (which is shown during driver
|
| 124 |
|
|
* initialization). I will soon add an ioctl to get
|
| 125 |
|
|
* this important parameter.
|
| 126 |
|
|
* Our data transfer buffer is allocated on startup,
|
| 127 |
|
|
* rather than before each data transfer. This should
|
| 128 |
|
|
* ensure that we will indeed have a data buffer.
|
| 129 |
|
|
* Ver 1.1 Dec 14 95 Fixed random problems which occurred when the tape
|
| 130 |
|
|
* shared an interface with another device.
|
| 131 |
|
|
* (poll_for_dsc was a complete mess).
|
| 132 |
|
|
* Removed some old (non-active) code which had
|
| 133 |
|
|
* to do with supporting buffer cache originated
|
| 134 |
|
|
* requests.
|
| 135 |
|
|
* The block device interface can now be opened, so
|
| 136 |
|
|
* that general ide driver features like the unmask
|
| 137 |
|
|
* interrupts flag can be selected with an ioctl.
|
| 138 |
|
|
* This is the only use of the block device interface.
|
| 139 |
|
|
* New fast pipelined operation mode (currently only on
|
| 140 |
|
|
* writes). When using the pipelined mode, the
|
| 141 |
|
|
* throughput can potentially reach the maximum
|
| 142 |
|
|
* tape supported throughput, regardless of the
|
| 143 |
|
|
* user backup program. On my tape drive, it sometimes
|
| 144 |
|
|
* boosted performance by a factor of 2. Pipelined
|
| 145 |
|
|
* mode is enabled by default, but since it has a few
|
| 146 |
|
|
* downfalls as well, you may want to disable it.
|
| 147 |
|
|
* A short explanation of the pipelined operation mode
|
| 148 |
|
|
* is available below.
|
| 149 |
|
|
* Ver 1.2 Jan 1 96 Eliminated pipelined mode race condition.
|
| 150 |
|
|
* Added pipeline read mode. As a result, restores
|
| 151 |
|
|
* are now as fast as backups.
|
| 152 |
|
|
* Optimized shared interface behavior. The new behavior
|
| 153 |
|
|
* typically results in better IDE bus efficiency and
|
| 154 |
|
|
* higher tape throughput.
|
| 155 |
|
|
* Pre-calculation of the expected read/write request
|
| 156 |
|
|
* service time, based on the tape's parameters. In
|
| 157 |
|
|
* the pipelined operation mode, this allows us to
|
| 158 |
|
|
* adjust our polling frequency to a much lower value,
|
| 159 |
|
|
* and thus to dramatically reduce our load on Linux,
|
| 160 |
|
|
* without any decrease in performance.
|
| 161 |
|
|
* Implemented additional mtio.h operations.
|
| 162 |
|
|
* The recommended user block size is returned by
|
| 163 |
|
|
* the MTIOCGET ioctl.
|
| 164 |
|
|
* Additional minor changes.
|
| 165 |
|
|
* Ver 1.3 Feb 9 96 Fixed pipelined read mode bug which prevented the
|
| 166 |
|
|
* use of some block sizes during a restore procedure.
|
| 167 |
|
|
* The character device interface will now present a
|
| 168 |
|
|
* continuous view of the media - any mix of block sizes
|
| 169 |
|
|
* during a backup/restore procedure is supported. The
|
| 170 |
|
|
* driver will buffer the requests internally and
|
| 171 |
|
|
* convert them to the tape's recommended transfer
|
| 172 |
|
|
* unit, making performance almost independent of the
|
| 173 |
|
|
* chosen user block size.
|
| 174 |
|
|
* Some improvements in error recovery.
|
| 175 |
|
|
* By cooperating with ide-dma.c, bus mastering DMA can
|
| 176 |
|
|
* now sometimes be used with IDE tape drives as well.
|
| 177 |
|
|
* Bus mastering DMA has the potential to dramatically
|
| 178 |
|
|
* reduce the CPU's overhead when accessing the device,
|
| 179 |
|
|
* and can be enabled by using hdparm -d1 on the tape's
|
| 180 |
|
|
* block device interface. For more info, read the
|
| 181 |
|
|
* comments in ide-dma.c.
|
| 182 |
|
|
* Ver 1.4 Mar 13 96 Fixed serialize support.
|
| 183 |
|
|
* Ver 1.5 Apr 12 96 Fixed shared interface operation, broken in 1.3.85.
|
| 184 |
|
|
* Fixed pipelined read mode inefficiency.
|
| 185 |
|
|
* Fixed nasty null dereferencing bug.
|
| 186 |
|
|
* Ver 1.6 Aug 16 96 Fixed FPU usage in the driver.
|
| 187 |
|
|
* Fixed end of media bug.
|
| 188 |
|
|
* Ver 1.7 Sep 10 96 Minor changes for the CONNER CTT8000-A model.
|
| 189 |
|
|
* Ver 1.8 Sep 26 96 Attempt to find a better balance between good
|
| 190 |
|
|
* interactive response and high system throughput.
|
| 191 |
|
|
* Ver 1.9 Nov 5 96 Automatically cross encountered filemarks rather
|
| 192 |
|
|
* than requiring an explicit FSF command.
|
| 193 |
|
|
* Abort pending requests at end of media.
|
| 194 |
|
|
* MTTELL was sometimes returning incorrect results.
|
| 195 |
|
|
* Return the real block size in the MTIOCGET ioctl.
|
| 196 |
|
|
* Some error recovery bug fixes.
|
| 197 |
|
|
* Ver 1.10 Nov 5 96 Major reorganization.
|
| 198 |
|
|
* Reduced CPU overhead a bit by eliminating internal
|
| 199 |
|
|
* bounce buffers.
|
| 200 |
|
|
* Added module support.
|
| 201 |
|
|
* Added multiple tape drives support.
|
| 202 |
|
|
* Added partition support.
|
| 203 |
|
|
* Rewrote DSC handling.
|
| 204 |
|
|
* Some portability fixes.
|
| 205 |
|
|
* Removed ide-tape.h.
|
| 206 |
|
|
* Additional minor changes.
|
| 207 |
|
|
* Ver 1.11 Dec 2 96 Bug fix in previous DSC timeout handling.
|
| 208 |
|
|
* Use ide_stall_queue() for DSC overlap.
|
| 209 |
|
|
* Use the maximum speed rather than the current speed
|
| 210 |
|
|
* to compute the request service time.
|
| 211 |
|
|
* Ver 1.12 Dec 7 97 Fix random memory overwriting and/or last block data
|
| 212 |
|
|
* corruption, which could occur if the total number
|
| 213 |
|
|
* of bytes written to the tape was not an integral
|
| 214 |
|
|
* number of tape blocks.
|
| 215 |
|
|
* Add support for INTERRUPT DRQ devices.
|
| 216 |
|
|
* Ver 1.13 Jan 2 98 Add "speed == 0" work-around for HP COLORADO 5GB
|
| 217 |
|
|
* Ver 1.14 Dec 30 98 Partial fixes for the Sony/AIWA tape drives.
|
| 218 |
|
|
* Replace cli()/sti() with hwgroup spinlocks.
|
| 219 |
|
|
* Ver 1.15 Mar 25 99 Fix SMP race condition by replacing hwgroup
|
| 220 |
|
|
* spinlock with private per-tape spinlock.
|
| 221 |
|
|
* Ver 1.16 Sep 1 99 Add OnStream tape support.
|
| 222 |
|
|
* Abort read pipeline on EOD.
|
| 223 |
|
|
* Wait for the tape to become ready in case it returns
|
| 224 |
|
|
* "in the process of becoming ready" on open().
|
| 225 |
|
|
* Fix zero padding of the last written block in
|
| 226 |
|
|
* case the tape block size is larger than PAGE_SIZE.
|
| 227 |
|
|
* Decrease the default disconnection time to tn.
|
| 228 |
|
|
* Ver 1.16e Oct 3 99 Minor fixes.
|
| 229 |
|
|
* Ver 1.16e1 Oct 13 99 Patches by Arnold Niessen,
|
| 230 |
|
|
* niessen@iae.nl / arnold.niessen@philips.com
|
| 231 |
|
|
* GO-1) Undefined code in idetape_read_position
|
| 232 |
|
|
* according to Gadi's email
|
| 233 |
|
|
* AJN-1) Minor fix asc == 11 should be asc == 0x11
|
| 234 |
|
|
* in idetape_issue_packet_command (did effect
|
| 235 |
|
|
* debugging output only)
|
| 236 |
|
|
* AJN-2) Added more debugging output, and
|
| 237 |
|
|
* added ide-tape: where missing. I would also
|
| 238 |
|
|
* like to add tape->name where possible
|
| 239 |
|
|
* AJN-3) Added different debug_level's
|
| 240 |
|
|
* via /proc/ide/hdc/settings
|
| 241 |
|
|
* "debug_level" determines amount of debugging output;
|
| 242 |
|
|
* can be changed using /proc/ide/hdx/settings
|
| 243 |
|
|
* 0 : almost no debugging output
|
| 244 |
|
|
* 1 : 0+output errors only
|
| 245 |
|
|
* 2 : 1+output all sensekey/asc
|
| 246 |
|
|
* 3 : 2+follow all chrdev related procedures
|
| 247 |
|
|
* 4 : 3+follow all procedures
|
| 248 |
|
|
* 5 : 4+include pc_stack rq_stack info
|
| 249 |
|
|
* 6 : 5+USE_COUNT updates
|
| 250 |
|
|
* AJN-4) Fixed timeout for retension in idetape_queue_pc_tail
|
| 251 |
|
|
* from 5 to 10 minutes
|
| 252 |
|
|
* AJN-5) Changed maximum number of blocks to skip when
|
| 253 |
|
|
* reading tapes with multiple consecutive write
|
| 254 |
|
|
* errors from 100 to 1000 in idetape_get_logical_blk
|
| 255 |
|
|
* Proposed changes to code:
|
| 256 |
|
|
* 1) output "logical_blk_num" via /proc
|
| 257 |
|
|
* 2) output "current_operation" via /proc
|
| 258 |
|
|
* 3) Either solve or document the fact that `mt rewind' is
|
| 259 |
|
|
* required after reading from /dev/nhtx to be
|
| 260 |
|
|
* able to rmmod the idetape module;
|
| 261 |
|
|
* Also, sometimes an application finishes but the
|
| 262 |
|
|
* device remains `busy' for some time. Same cause ?
|
| 263 |
|
|
* Proposed changes to release-notes:
|
| 264 |
|
|
* 4) write a simple `quickstart' section in the
|
| 265 |
|
|
* release notes; I volunteer if you don't want to
|
| 266 |
|
|
* 5) include a pointer to video4linux in the doc
|
| 267 |
|
|
* to stimulate video applications
|
| 268 |
|
|
* 6) release notes lines 331 and 362: explain what happens
|
| 269 |
|
|
* if the application data rate is higher than 1100 KB/s;
|
| 270 |
|
|
* similar approach to lower-than-500 kB/s ?
|
| 271 |
|
|
* 7) 6.6 Comparison; wouldn't it be better to allow different
|
| 272 |
|
|
* strategies for read and write ?
|
| 273 |
|
|
* Wouldn't it be better to control the tape buffer
|
| 274 |
|
|
* contents instead of the bandwidth ?
|
| 275 |
|
|
* 8) line 536: replace will by would (if I understand
|
| 276 |
|
|
* this section correctly, a hypothetical and unwanted situation
|
| 277 |
|
|
* is being described)
|
| 278 |
|
|
* Ver 1.16f Dec 15 99 Change place of the secondary OnStream header frames.
|
| 279 |
|
|
* Ver 1.17 Nov 2000 / Jan 2001 Marcel Mol, marcel@mesa.nl
|
| 280 |
|
|
* - Add idetape_onstream_mode_sense_tape_parameter_page
|
| 281 |
|
|
* function to get tape capacity in frames: tape->capacity.
|
| 282 |
|
|
* - Add support for DI-50 drives( or any DI- drive).
|
| 283 |
|
|
* - 'workaround' for read error/blank block arround block 3000.
|
| 284 |
|
|
* - Implement Early warning for end of media for Onstream.
|
| 285 |
|
|
* - Cosmetic code changes for readability.
|
| 286 |
|
|
* - Idetape_position_tape should not use SKIP bit during
|
| 287 |
|
|
* Onstream read recovery.
|
| 288 |
|
|
* - Add capacity, logical_blk_num and first/last_frame_position
|
| 289 |
|
|
* to /proc/ide/hd?/settings.
|
| 290 |
|
|
* - Module use count was gone in the Linux 2.4 driver.
|
| 291 |
|
|
* Ver 1.17a Apr 2001 Willem Riede osst@riede.org
|
| 292 |
|
|
* - Get drive's actual block size from mode sense block descriptor
|
| 293 |
|
|
* - Limit size of pipeline
|
| 294 |
|
|
* Ver 1.17b Dec 2002 Alan Stern <stern@rowland.harvard.edu>
|
| 295 |
|
|
* Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used
|
| 296 |
|
|
* it in the code!
|
| 297 |
|
|
* Actually removed aborted stages in idetape_abort_pipeline
|
| 298 |
|
|
* instead of just changing the command code.
|
| 299 |
|
|
* Made the transfer byte count for Request Sense equal to the
|
| 300 |
|
|
* actual length of the data transfer.
|
| 301 |
|
|
* Changed handling of partial data transfers: they do not
|
| 302 |
|
|
* cause DMA errors.
|
| 303 |
|
|
* Moved initiation of DMA transfers to the correct place.
|
| 304 |
|
|
* Removed reference to unallocated memory.
|
| 305 |
|
|
* Made __idetape_discard_read_pipeline return the number of
|
| 306 |
|
|
* sectors skipped, not the number of stages.
|
| 307 |
|
|
* Replaced errant kfree() calls with __idetape_kfree_stage().
|
| 308 |
|
|
* Fixed off-by-one error in testing the pipeline length.
|
| 309 |
|
|
* Fixed handling of filemarks in the read pipeline.
|
| 310 |
|
|
* Small code optimization for MTBSF and MTBSFM ioctls.
|
| 311 |
|
|
* Don't try to unlock the door during device close if is
|
| 312 |
|
|
* already unlocked!
|
| 313 |
|
|
* Cosmetic fixes to miscellaneous debugging output messages.
|
| 314 |
|
|
* Set the minimum /proc/ide/hd?/settings values for "pipeline",
|
| 315 |
|
|
* "pipeline_min", and "pipeline_max" to 1.
|
| 316 |
|
|
* Ver 1.17c Sep 2003 Stuart Hayes <stuart_hayes@dell.com>
|
| 317 |
|
|
* Initialized "feature" in idetape_issue_packet_command
|
| 318 |
|
|
* (this was causing lockups on certain systems)
|
| 319 |
|
|
*
|
| 320 |
|
|
* Here are some words from the first releases of hd.c, which are quoted
|
| 321 |
|
|
* in ide.c and apply here as well:
|
| 322 |
|
|
*
|
| 323 |
|
|
* | Special care is recommended. Have Fun!
|
| 324 |
|
|
*
|
| 325 |
|
|
*/
|
| 326 |
|
|
|
| 327 |
|
|
/*
|
| 328 |
|
|
* An overview of the pipelined operation mode.
|
| 329 |
|
|
*
|
| 330 |
|
|
* In the pipelined write mode, we will usually just add requests to our
|
| 331 |
|
|
* pipeline and return immediately, before we even start to service them. The
|
| 332 |
|
|
* user program will then have enough time to prepare the next request while
|
| 333 |
|
|
* we are still busy servicing previous requests. In the pipelined read mode,
|
| 334 |
|
|
* the situation is similar - we add read-ahead requests into the pipeline,
|
| 335 |
|
|
* before the user even requested them.
|
| 336 |
|
|
*
|
| 337 |
|
|
* The pipeline can be viewed as a "safety net" which will be activated when
|
| 338 |
|
|
* the system load is high and prevents the user backup program from keeping up
|
| 339 |
|
|
* with the current tape speed. At this point, the pipeline will get
|
| 340 |
|
|
* shorter and shorter but the tape will still be streaming at the same speed.
|
| 341 |
|
|
* Assuming we have enough pipeline stages, the system load will hopefully
|
| 342 |
|
|
* decrease before the pipeline is completely empty, and the backup program
|
| 343 |
|
|
* will be able to "catch up" and refill the pipeline again.
|
| 344 |
|
|
*
|
| 345 |
|
|
* When using the pipelined mode, it would be best to disable any type of
|
| 346 |
|
|
* buffering done by the user program, as ide-tape already provides all the
|
| 347 |
|
|
* benefits in the kernel, where it can be done in a more efficient way.
|
| 348 |
|
|
* As we will usually not block the user program on a request, the most
|
| 349 |
|
|
* efficient user code will then be a simple read-write-read-... cycle.
|
| 350 |
|
|
* Any additional logic will usually just slow down the backup process.
|
| 351 |
|
|
*
|
| 352 |
|
|
* Using the pipelined mode, I get a constant over 400 KBps throughput,
|
| 353 |
|
|
* which seems to be the maximum throughput supported by my tape.
|
| 354 |
|
|
*
|
| 355 |
|
|
* However, there are some downfalls:
|
| 356 |
|
|
*
|
| 357 |
|
|
* 1. We use memory (for data buffers) in proportional to the number
|
| 358 |
|
|
* of pipeline stages (each stage is about 26 KB with my tape).
|
| 359 |
|
|
* 2. In the pipelined write mode, we cheat and postpone error codes
|
| 360 |
|
|
* to the user task. In read mode, the actual tape position
|
| 361 |
|
|
* will be a bit further than the last requested block.
|
| 362 |
|
|
*
|
| 363 |
|
|
* Concerning (1):
|
| 364 |
|
|
*
|
| 365 |
|
|
* 1. We allocate stages dynamically only when we need them. When
|
| 366 |
|
|
* we don't need them, we don't consume additional memory. In
|
| 367 |
|
|
* case we can't allocate stages, we just manage without them
|
| 368 |
|
|
* (at the expense of decreased throughput) so when Linux is
|
| 369 |
|
|
* tight in memory, we will not pose additional difficulties.
|
| 370 |
|
|
*
|
| 371 |
|
|
* 2. The maximum number of stages (which is, in fact, the maximum
|
| 372 |
|
|
* amount of memory) which we allocate is limited by the compile
|
| 373 |
|
|
* time parameter IDETAPE_MAX_PIPELINE_STAGES.
|
| 374 |
|
|
*
|
| 375 |
|
|
* 3. The maximum number of stages is a controlled parameter - We
|
| 376 |
|
|
* don't start from the user defined maximum number of stages
|
| 377 |
|
|
* but from the lower IDETAPE_MIN_PIPELINE_STAGES (again, we
|
| 378 |
|
|
* will not even allocate this amount of stages if the user
|
| 379 |
|
|
* program can't handle the speed). We then implement a feedback
|
| 380 |
|
|
* loop which checks if the pipeline is empty, and if it is, we
|
| 381 |
|
|
* increase the maximum number of stages as necessary until we
|
| 382 |
|
|
* reach the optimum value which just manages to keep the tape
|
| 383 |
|
|
* busy with minimum allocated memory or until we reach
|
| 384 |
|
|
* IDETAPE_MAX_PIPELINE_STAGES.
|
| 385 |
|
|
*
|
| 386 |
|
|
* Concerning (2):
|
| 387 |
|
|
*
|
| 388 |
|
|
* In pipelined write mode, ide-tape can not return accurate error codes
|
| 389 |
|
|
* to the user program since we usually just add the request to the
|
| 390 |
|
|
* pipeline without waiting for it to be serviced. In case an error
|
| 391 |
|
|
* occurs, I will report it on the next user request.
|
| 392 |
|
|
*
|
| 393 |
|
|
* In the pipelined read mode, subsequent read requests or forward
|
| 394 |
|
|
* filemark spacing will perform correctly, as we preserve all blocks
|
| 395 |
|
|
* and filemarks which we encountered during our excess read-ahead.
|
| 396 |
|
|
*
|
| 397 |
|
|
* For accurate tape positioning and error reporting, disabling
|
| 398 |
|
|
* pipelined mode might be the best option.
|
| 399 |
|
|
*
|
| 400 |
|
|
* You can enable/disable/tune the pipelined operation mode by adjusting
|
| 401 |
|
|
* the compile time parameters below.
|
| 402 |
|
|
*/
|
| 403 |
|
|
|
| 404 |
|
|
/*
|
| 405 |
|
|
* Possible improvements.
|
| 406 |
|
|
*
|
| 407 |
|
|
* 1. Support for the ATAPI overlap protocol.
|
| 408 |
|
|
*
|
| 409 |
|
|
* In order to maximize bus throughput, we currently use the DSC
|
| 410 |
|
|
* overlap method which enables ide.c to service requests from the
|
| 411 |
|
|
* other device while the tape is busy executing a command. The
|
| 412 |
|
|
* DSC overlap method involves polling the tape's status register
|
| 413 |
|
|
* for the DSC bit, and servicing the other device while the tape
|
| 414 |
|
|
* isn't ready.
|
| 415 |
|
|
*
|
| 416 |
|
|
* In the current QIC development standard (December 1995),
|
| 417 |
|
|
* it is recommended that new tape drives will *in addition*
|
| 418 |
|
|
* implement the ATAPI overlap protocol, which is used for the
|
| 419 |
|
|
* same purpose - efficient use of the IDE bus, but is interrupt
|
| 420 |
|
|
* driven and thus has much less CPU overhead.
|
| 421 |
|
|
*
|
| 422 |
|
|
* ATAPI overlap is likely to be supported in most new ATAPI
|
| 423 |
|
|
* devices, including new ATAPI cdroms, and thus provides us
|
| 424 |
|
|
* a method by which we can achieve higher throughput when
|
| 425 |
|
|
* sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
|
| 426 |
|
|
*/
|
| 427 |
|
|
|
| 428 |
|
|
#define IDETAPE_VERSION "1.17c"
|
| 429 |
|
|
|
| 430 |
|
|
#include <linux/config.h>
|
| 431 |
|
|
#include <linux/module.h>
|
| 432 |
|
|
#include <linux/types.h>
|
| 433 |
|
|
#include <linux/string.h>
|
| 434 |
|
|
#include <linux/kernel.h>
|
| 435 |
|
|
#include <linux/delay.h>
|
| 436 |
|
|
#include <linux/timer.h>
|
| 437 |
|
|
#include <linux/mm.h>
|
| 438 |
|
|
#include <linux/interrupt.h>
|
| 439 |
|
|
#include <linux/major.h>
|
| 440 |
|
|
#include <linux/devfs_fs_kernel.h>
|
| 441 |
|
|
#include <linux/errno.h>
|
| 442 |
|
|
#include <linux/genhd.h>
|
| 443 |
|
|
#include <linux/slab.h>
|
| 444 |
|
|
#include <linux/ide.h>
|
| 445 |
|
|
#include <linux/smp_lock.h>
|
| 446 |
|
|
#include <linux/completion.h>
|
| 447 |
|
|
|
| 448 |
|
|
#include <asm/byteorder.h>
|
| 449 |
|
|
#include <asm/irq.h>
|
| 450 |
|
|
#include <asm/uaccess.h>
|
| 451 |
|
|
#include <asm/io.h>
|
| 452 |
|
|
#include <asm/unaligned.h>
|
| 453 |
|
|
#include <asm/bitops.h>
|
| 454 |
|
|
|
| 455 |
|
|
|
| 456 |
|
|
/*
|
| 457 |
|
|
* OnStream support
|
| 458 |
|
|
*/
|
| 459 |
|
|
#define ONSTREAM_DEBUG (0)
|
| 460 |
|
|
#define OS_CONFIG_PARTITION (0xff)
|
| 461 |
|
|
#define OS_DATA_PARTITION (0)
|
| 462 |
|
|
#define OS_PARTITION_VERSION (1)
|
| 463 |
|
|
#define OS_EW 300
|
| 464 |
|
|
#define OS_ADR_MINREV 2
|
| 465 |
|
|
|
| 466 |
|
|
#define OS_DATA_STARTFRAME1 20
|
| 467 |
|
|
#define OS_DATA_ENDFRAME1 2980
|
| 468 |
|
|
/*
|
| 469 |
|
|
* partition
|
| 470 |
|
|
*/
|
| 471 |
|
|
typedef struct os_partition_s {
|
| 472 |
|
|
__u8 partition_num;
|
| 473 |
|
|
__u8 par_desc_ver;
|
| 474 |
|
|
__u16 wrt_pass_cntr;
|
| 475 |
|
|
__u32 first_frame_addr;
|
| 476 |
|
|
__u32 last_frame_addr;
|
| 477 |
|
|
__u32 eod_frame_addr;
|
| 478 |
|
|
} os_partition_t;
|
| 479 |
|
|
|
| 480 |
|
|
/*
|
| 481 |
|
|
* DAT entry
|
| 482 |
|
|
*/
|
| 483 |
|
|
typedef struct os_dat_entry_s {
|
| 484 |
|
|
__u32 blk_sz;
|
| 485 |
|
|
__u16 blk_cnt;
|
| 486 |
|
|
__u8 flags;
|
| 487 |
|
|
__u8 reserved;
|
| 488 |
|
|
} os_dat_entry_t;
|
| 489 |
|
|
|
| 490 |
|
|
/*
|
| 491 |
|
|
* DAT
|
| 492 |
|
|
*/
|
| 493 |
|
|
#define OS_DAT_FLAGS_DATA (0xc)
|
| 494 |
|
|
#define OS_DAT_FLAGS_MARK (0x1)
|
| 495 |
|
|
|
| 496 |
|
|
typedef struct os_dat_s {
|
| 497 |
|
|
__u8 dat_sz;
|
| 498 |
|
|
__u8 reserved1;
|
| 499 |
|
|
__u8 entry_cnt;
|
| 500 |
|
|
__u8 reserved3;
|
| 501 |
|
|
os_dat_entry_t dat_list[16];
|
| 502 |
|
|
} os_dat_t;
|
| 503 |
|
|
|
| 504 |
|
|
/*
|
| 505 |
|
|
* Frame types
|
| 506 |
|
|
*/
|
| 507 |
|
|
#define OS_FRAME_TYPE_FILL (0)
|
| 508 |
|
|
#define OS_FRAME_TYPE_EOD (1 << 0)
|
| 509 |
|
|
#define OS_FRAME_TYPE_MARKER (1 << 1)
|
| 510 |
|
|
#define OS_FRAME_TYPE_HEADER (1 << 3)
|
| 511 |
|
|
#define OS_FRAME_TYPE_DATA (1 << 7)
|
| 512 |
|
|
|
| 513 |
|
|
/*
|
| 514 |
|
|
* AUX
|
| 515 |
|
|
*/
|
| 516 |
|
|
typedef struct os_aux_s {
|
| 517 |
|
|
__u32 format_id; /* hardware compability AUX is based on */
|
| 518 |
|
|
char application_sig[4]; /* driver used to write this media */
|
| 519 |
|
|
__u32 hdwr; /* reserved */
|
| 520 |
|
|
__u32 update_frame_cntr; /* for configuration frame */
|
| 521 |
|
|
__u8 frame_type;
|
| 522 |
|
|
__u8 frame_type_reserved;
|
| 523 |
|
|
__u8 reserved_18_19[2];
|
| 524 |
|
|
os_partition_t partition;
|
| 525 |
|
|
__u8 reserved_36_43[8];
|
| 526 |
|
|
__u32 frame_seq_num;
|
| 527 |
|
|
__u32 logical_blk_num_high;
|
| 528 |
|
|
__u32 logical_blk_num;
|
| 529 |
|
|
os_dat_t dat;
|
| 530 |
|
|
__u8 reserved188_191[4];
|
| 531 |
|
|
__u32 filemark_cnt;
|
| 532 |
|
|
__u32 phys_fm;
|
| 533 |
|
|
__u32 last_mark_addr;
|
| 534 |
|
|
__u8 reserved204_223[20];
|
| 535 |
|
|
|
| 536 |
|
|
/*
|
| 537 |
|
|
* __u8 app_specific[32];
|
| 538 |
|
|
*
|
| 539 |
|
|
* Linux specific fields:
|
| 540 |
|
|
*/
|
| 541 |
|
|
__u32 next_mark_addr; /* when known, points to next marker */
|
| 542 |
|
|
__u8 linux_specific[28];
|
| 543 |
|
|
|
| 544 |
|
|
__u8 reserved_256_511[256];
|
| 545 |
|
|
} os_aux_t;
|
| 546 |
|
|
|
| 547 |
|
|
typedef struct os_header_s {
|
| 548 |
|
|
char ident_str[8];
|
| 549 |
|
|
__u8 major_rev;
|
| 550 |
|
|
__u8 minor_rev;
|
| 551 |
|
|
__u8 reserved10_15[6];
|
| 552 |
|
|
__u8 par_num;
|
| 553 |
|
|
__u8 reserved1_3[3];
|
| 554 |
|
|
os_partition_t partition;
|
| 555 |
|
|
} os_header_t;
|
| 556 |
|
|
|
| 557 |
|
|
/*
|
| 558 |
|
|
* OnStream Tape Parameters Page
|
| 559 |
|
|
*/
|
| 560 |
|
|
typedef struct {
|
| 561 |
|
|
unsigned page_code :6; /* Page code - Should be 0x2b */
|
| 562 |
|
|
unsigned reserved1_6 :1;
|
| 563 |
|
|
unsigned ps :1;
|
| 564 |
|
|
__u8 reserved2;
|
| 565 |
|
|
__u8 density; /* kbpi */
|
| 566 |
|
|
__u8 reserved3,reserved4;
|
| 567 |
|
|
__u16 segtrk; /* segment of per track */
|
| 568 |
|
|
__u16 trks; /* tracks per tape */
|
| 569 |
|
|
__u8 reserved5,reserved6,reserved7,reserved8,reserved9,reserved10;
|
| 570 |
|
|
} onstream_tape_paramtr_page_t;
|
| 571 |
|
|
|
| 572 |
|
|
/*
|
| 573 |
|
|
* OnStream ADRL frame
|
| 574 |
|
|
*/
|
| 575 |
|
|
#define OS_FRAME_SIZE (32 * 1024 + 512)
|
| 576 |
|
|
#define OS_DATA_SIZE (32 * 1024)
|
| 577 |
|
|
#define OS_AUX_SIZE (512)
|
| 578 |
|
|
|
| 579 |
|
|
/*
|
| 580 |
|
|
* internal error codes for onstream
|
| 581 |
|
|
*/
|
| 582 |
|
|
#define OS_PART_ERROR 2
|
| 583 |
|
|
#define OS_WRITE_ERROR 1
|
| 584 |
|
|
|
| 585 |
|
|
#include <linux/mtio.h>
|
| 586 |
|
|
|
| 587 |
|
|
/**************************** Tunable parameters *****************************/
|
| 588 |
|
|
|
| 589 |
|
|
|
| 590 |
|
|
/*
|
| 591 |
|
|
* Pipelined mode parameters.
|
| 592 |
|
|
*
|
| 593 |
|
|
* We try to use the minimum number of stages which is enough to
|
| 594 |
|
|
* keep the tape constantly streaming. To accomplish that, we implement
|
| 595 |
|
|
* a feedback loop around the maximum number of stages:
|
| 596 |
|
|
*
|
| 597 |
|
|
* We start from MIN maximum stages (we will not even use MIN stages
|
| 598 |
|
|
* if we don't need them), increment it by RATE*(MAX-MIN)
|
| 599 |
|
|
* whenever we sense that the pipeline is empty, until we reach
|
| 600 |
|
|
* the optimum value or until we reach MAX.
|
| 601 |
|
|
*
|
| 602 |
|
|
* Setting the following parameter to 0 is illegal: the pipelined mode
|
| 603 |
|
|
* cannot be disabled (calculate_speeds() divides by tape->max_stages.)
|
| 604 |
|
|
*/
|
| 605 |
|
|
#define IDETAPE_MIN_PIPELINE_STAGES 1
|
| 606 |
|
|
#define IDETAPE_MAX_PIPELINE_STAGES 400
|
| 607 |
|
|
#define IDETAPE_INCREASE_STAGES_RATE 20
|
| 608 |
|
|
|
| 609 |
|
|
/*
|
| 610 |
|
|
* The following are used to debug the driver:
|
| 611 |
|
|
*
|
| 612 |
|
|
* Setting IDETAPE_DEBUG_INFO to 1 will report device capabilities.
|
| 613 |
|
|
* Setting IDETAPE_DEBUG_LOG to 1 will log driver flow control.
|
| 614 |
|
|
* Setting IDETAPE_DEBUG_BUGS to 1 will enable self-sanity checks in
|
| 615 |
|
|
* some places.
|
| 616 |
|
|
*
|
| 617 |
|
|
* Setting them to 0 will restore normal operation mode:
|
| 618 |
|
|
*
|
| 619 |
|
|
* 1. Disable logging normal successful operations.
|
| 620 |
|
|
* 2. Disable self-sanity checks.
|
| 621 |
|
|
* 3. Errors will still be logged, of course.
|
| 622 |
|
|
*
|
| 623 |
|
|
* All the #if DEBUG code will be removed some day, when the driver
|
| 624 |
|
|
* is verified to be stable enough. This will make it much more
|
| 625 |
|
|
* esthetic.
|
| 626 |
|
|
*/
|
| 627 |
|
|
#define IDETAPE_DEBUG_INFO 0
|
| 628 |
|
|
#define IDETAPE_DEBUG_LOG 0
|
| 629 |
|
|
#define IDETAPE_DEBUG_LOG_VERBOSE 0
|
| 630 |
|
|
#define IDETAPE_DEBUG_BUGS 1
|
| 631 |
|
|
|
| 632 |
|
|
/*
|
| 633 |
|
|
* After each failed packet command we issue a request sense command
|
| 634 |
|
|
* and retry the packet command IDETAPE_MAX_PC_RETRIES times.
|
| 635 |
|
|
*
|
| 636 |
|
|
* Setting IDETAPE_MAX_PC_RETRIES to 0 will disable retries.
|
| 637 |
|
|
*/
|
| 638 |
|
|
#define IDETAPE_MAX_PC_RETRIES 3
|
| 639 |
|
|
|
| 640 |
|
|
/*
|
| 641 |
|
|
* With each packet command, we allocate a buffer of
|
| 642 |
|
|
* IDETAPE_PC_BUFFER_SIZE bytes. This is used for several packet
|
| 643 |
|
|
* commands (Not for READ/WRITE commands).
|
| 644 |
|
|
*/
|
| 645 |
|
|
#define IDETAPE_PC_BUFFER_SIZE 256
|
| 646 |
|
|
|
| 647 |
|
|
/*
|
| 648 |
|
|
* In various places in the driver, we need to allocate storage
|
| 649 |
|
|
* for packet commands and requests, which will remain valid while
|
| 650 |
|
|
* we leave the driver to wait for an interrupt or a timeout event.
|
| 651 |
|
|
*/
|
| 652 |
|
|
#define IDETAPE_PC_STACK (10 + IDETAPE_MAX_PC_RETRIES)
|
| 653 |
|
|
|
| 654 |
|
|
/*
|
| 655 |
|
|
* Some tape drives require a long irq timeout
|
| 656 |
|
|
*/
|
| 657 |
|
|
#define IDETAPE_WAIT_CMD (60*HZ)
|
| 658 |
|
|
|
| 659 |
|
|
/*
|
| 660 |
|
|
* The following parameter is used to select the point in the internal
|
| 661 |
|
|
* tape fifo in which we will start to refill the buffer. Decreasing
|
| 662 |
|
|
* the following parameter will improve the system's latency and
|
| 663 |
|
|
* interactive response, while using a high value might improve sytem
|
| 664 |
|
|
* throughput.
|
| 665 |
|
|
*/
|
| 666 |
|
|
#define IDETAPE_FIFO_THRESHOLD 2
|
| 667 |
|
|
|
| 668 |
|
|
/*
|
| 669 |
|
|
* DSC polling parameters.
|
| 670 |
|
|
*
|
| 671 |
|
|
* Polling for DSC (a single bit in the status register) is a very
|
| 672 |
|
|
* important function in ide-tape. There are two cases in which we
|
| 673 |
|
|
* poll for DSC:
|
| 674 |
|
|
*
|
| 675 |
|
|
* 1. Before a read/write packet command, to ensure that we
|
| 676 |
|
|
* can transfer data from/to the tape's data buffers, without
|
| 677 |
|
|
* causing an actual media access. In case the tape is not
|
| 678 |
|
|
* ready yet, we take out our request from the device
|
| 679 |
|
|
* request queue, so that ide.c will service requests from
|
| 680 |
|
|
* the other device on the same interface meanwhile.
|
| 681 |
|
|
*
|
| 682 |
|
|
* 2. After the successful initialization of a "media access
|
| 683 |
|
|
* packet command", which is a command which can take a long
|
| 684 |
|
|
* time to complete (it can be several seconds or even an hour).
|
| 685 |
|
|
*
|
| 686 |
|
|
* Again, we postpone our request in the middle to free the bus
|
| 687 |
|
|
* for the other device. The polling frequency here should be
|
| 688 |
|
|
* lower than the read/write frequency since those media access
|
| 689 |
|
|
* commands are slow. We start from a "fast" frequency -
|
| 690 |
|
|
* IDETAPE_DSC_MA_FAST (one second), and if we don't receive DSC
|
| 691 |
|
|
* after IDETAPE_DSC_MA_THRESHOLD (5 minutes), we switch it to a
|
| 692 |
|
|
* lower frequency - IDETAPE_DSC_MA_SLOW (1 minute).
|
| 693 |
|
|
*
|
| 694 |
|
|
* We also set a timeout for the timer, in case something goes wrong.
|
| 695 |
|
|
* The timeout should be longer then the maximum execution time of a
|
| 696 |
|
|
* tape operation.
|
| 697 |
|
|
*/
|
| 698 |
|
|
|
| 699 |
|
|
/*
|
| 700 |
|
|
* DSC timings.
|
| 701 |
|
|
*/
|
| 702 |
|
|
#define IDETAPE_DSC_RW_MIN 5*HZ/100 /* 50 msec */
|
| 703 |
|
|
#define IDETAPE_DSC_RW_MAX 40*HZ/100 /* 400 msec */
|
| 704 |
|
|
#define IDETAPE_DSC_RW_TIMEOUT 2*60*HZ /* 2 minutes */
|
| 705 |
|
|
#define IDETAPE_DSC_MA_FAST 2*HZ /* 2 seconds */
|
| 706 |
|
|
#define IDETAPE_DSC_MA_THRESHOLD 5*60*HZ /* 5 minutes */
|
| 707 |
|
|
#define IDETAPE_DSC_MA_SLOW 30*HZ /* 30 seconds */
|
| 708 |
|
|
#define IDETAPE_DSC_MA_TIMEOUT 2*60*60*HZ /* 2 hours */
|
| 709 |
|
|
|
| 710 |
|
|
/*************************** End of tunable parameters ***********************/
|
| 711 |
|
|
|
| 712 |
|
|
/*
|
| 713 |
|
|
* Debugging/Performance analysis
|
| 714 |
|
|
*
|
| 715 |
|
|
* I/O trace support
|
| 716 |
|
|
*/
|
| 717 |
|
|
#define USE_IOTRACE 0
|
| 718 |
|
|
#if USE_IOTRACE
|
| 719 |
|
|
#include <linux/io_trace.h>
|
| 720 |
|
|
#define IO_IDETAPE_FIFO 500
|
| 721 |
|
|
#endif
|
| 722 |
|
|
|
| 723 |
|
|
/*
|
| 724 |
|
|
* Read/Write error simulation
|
| 725 |
|
|
*/
|
| 726 |
|
|
#define SIMULATE_ERRORS 0
|
| 727 |
|
|
|
| 728 |
|
|
/*
|
| 729 |
|
|
* For general magnetic tape device compatibility.
|
| 730 |
|
|
*/
|
| 731 |
|
|
typedef enum {
|
| 732 |
|
|
idetape_direction_none,
|
| 733 |
|
|
idetape_direction_read,
|
| 734 |
|
|
idetape_direction_write
|
| 735 |
|
|
} idetape_chrdev_direction_t;
|
| 736 |
|
|
|
| 737 |
|
|
/*
|
| 738 |
|
|
* Our view of a packet command.
|
| 739 |
|
|
*/
|
| 740 |
|
|
typedef struct idetape_packet_command_s {
|
| 741 |
|
|
u8 c[12]; /* Actual packet bytes */
|
| 742 |
|
|
int retries; /* On each retry, we increment retries */
|
| 743 |
|
|
int error; /* Error code */
|
| 744 |
|
|
int request_transfer; /* Bytes to transfer */
|
| 745 |
|
|
int actually_transferred; /* Bytes actually transferred */
|
| 746 |
|
|
int buffer_size; /* Size of our data buffer */
|
| 747 |
|
|
struct buffer_head *bh;
|
| 748 |
|
|
char *b_data;
|
| 749 |
|
|
int b_count;
|
| 750 |
|
|
u8 *buffer; /* Data buffer */
|
| 751 |
|
|
u8 *current_position; /* Pointer into the above buffer */
|
| 752 |
|
|
ide_startstop_t (*callback) (ide_drive_t *); /* Called when this packet command is completed */
|
| 753 |
|
|
u8 pc_buffer[IDETAPE_PC_BUFFER_SIZE]; /* Temporary buffer */
|
| 754 |
|
|
unsigned long flags; /* Status/Action bit flags: long for set_bit */
|
| 755 |
|
|
} idetape_pc_t;
|
| 756 |
|
|
|
| 757 |
|
|
/*
|
| 758 |
|
|
* Packet command flag bits.
|
| 759 |
|
|
*/
|
| 760 |
|
|
/* Set when an error is considered normal - We won't retry */
|
| 761 |
|
|
#define PC_ABORT 0
|
| 762 |
|
|
/* 1 When polling for DSC on a media access command */
|
| 763 |
|
|
#define PC_WAIT_FOR_DSC 1
|
| 764 |
|
|
/* 1 when we prefer to use DMA if possible */
|
| 765 |
|
|
#define PC_DMA_RECOMMENDED 2
|
| 766 |
|
|
/* 1 while DMA in progress */
|
| 767 |
|
|
#define PC_DMA_IN_PROGRESS 3
|
| 768 |
|
|
/* 1 when encountered problem during DMA */
|
| 769 |
|
|
#define PC_DMA_ERROR 4
|
| 770 |
|
|
/* Data direction */
|
| 771 |
|
|
#define PC_WRITING 5
|
| 772 |
|
|
|
| 773 |
|
|
/*
|
| 774 |
|
|
* Capabilities and Mechanical Status Page
|
| 775 |
|
|
*/
|
| 776 |
|
|
typedef struct {
|
| 777 |
|
|
unsigned page_code :6; /* Page code - Should be 0x2a */
|
| 778 |
|
|
__u8 reserved0_6 :1;
|
| 779 |
|
|
__u8 ps :1; /* parameters saveable */
|
| 780 |
|
|
__u8 page_length; /* Page Length - Should be 0x12 */
|
| 781 |
|
|
__u8 reserved2, reserved3;
|
| 782 |
|
|
unsigned ro :1; /* Read Only Mode */
|
| 783 |
|
|
unsigned reserved4_1234 :4;
|
| 784 |
|
|
unsigned sprev :1; /* Supports SPACE in the reverse direction */
|
| 785 |
|
|
unsigned reserved4_67 :2;
|
| 786 |
|
|
unsigned reserved5_012 :3;
|
| 787 |
|
|
unsigned efmt :1; /* Supports ERASE command initiated formatting */
|
| 788 |
|
|
unsigned reserved5_4 :1;
|
| 789 |
|
|
unsigned qfa :1; /* Supports the QFA two partition formats */
|
| 790 |
|
|
unsigned reserved5_67 :2;
|
| 791 |
|
|
unsigned lock :1; /* Supports locking the volume */
|
| 792 |
|
|
unsigned locked :1; /* The volume is locked */
|
| 793 |
|
|
unsigned prevent :1; /* The device defaults in the prevent state after power up */
|
| 794 |
|
|
unsigned eject :1; /* The device can eject the volume */
|
| 795 |
|
|
__u8 disconnect :1; /* The device can break request > ctl */
|
| 796 |
|
|
__u8 reserved6_5 :1;
|
| 797 |
|
|
unsigned ecc :1; /* Supports error correction */
|
| 798 |
|
|
unsigned cmprs :1; /* Supports data compression */
|
| 799 |
|
|
unsigned reserved7_0 :1;
|
| 800 |
|
|
unsigned blk512 :1; /* Supports 512 bytes block size */
|
| 801 |
|
|
unsigned blk1024 :1; /* Supports 1024 bytes block size */
|
| 802 |
|
|
unsigned reserved7_3_6 :4;
|
| 803 |
|
|
unsigned blk32768 :1; /* slowb - the device restricts the byte count for PIO */
|
| 804 |
|
|
/* transfers for slow buffer memory ??? */
|
| 805 |
|
|
/* Also 32768 block size in some cases */
|
| 806 |
|
|
__u16 max_speed; /* Maximum speed supported in KBps */
|
| 807 |
|
|
__u8 reserved10, reserved11;
|
| 808 |
|
|
__u16 ctl; /* Continuous Transfer Limit in blocks */
|
| 809 |
|
|
__u16 speed; /* Current Speed, in KBps */
|
| 810 |
|
|
__u16 buffer_size; /* Buffer Size, in 512 bytes */
|
| 811 |
|
|
__u8 reserved18, reserved19;
|
| 812 |
|
|
} idetape_capabilities_page_t;
|
| 813 |
|
|
|
| 814 |
|
|
/*
|
| 815 |
|
|
* Block Size Page
|
| 816 |
|
|
*/
|
| 817 |
|
|
typedef struct {
|
| 818 |
|
|
unsigned page_code :6; /* Page code - Should be 0x30 */
|
| 819 |
|
|
unsigned reserved1_6 :1;
|
| 820 |
|
|
unsigned ps :1;
|
| 821 |
|
|
__u8 page_length; /* Page Length - Should be 2 */
|
| 822 |
|
|
__u8 reserved2;
|
| 823 |
|
|
unsigned play32 :1;
|
| 824 |
|
|
unsigned play32_5 :1;
|
| 825 |
|
|
unsigned reserved2_23 :2;
|
| 826 |
|
|
unsigned record32 :1;
|
| 827 |
|
|
unsigned record32_5 :1;
|
| 828 |
|
|
unsigned reserved2_6 :1;
|
| 829 |
|
|
unsigned one :1;
|
| 830 |
|
|
} idetape_block_size_page_t;
|
| 831 |
|
|
|
| 832 |
|
|
/*
|
| 833 |
|
|
* A pipeline stage.
|
| 834 |
|
|
*/
|
| 835 |
|
|
typedef struct idetape_stage_s {
|
| 836 |
|
|
struct request rq; /* The corresponding request */
|
| 837 |
|
|
struct buffer_head *bh; /* The data buffers */
|
| 838 |
|
|
struct idetape_stage_s *next; /* Pointer to the next stage */
|
| 839 |
|
|
os_aux_t *aux; /* OnStream aux ptr */
|
| 840 |
|
|
} idetape_stage_t;
|
| 841 |
|
|
|
| 842 |
|
|
/*
|
| 843 |
|
|
* REQUEST SENSE packet command result - Data Format.
|
| 844 |
|
|
*/
|
| 845 |
|
|
typedef struct {
|
| 846 |
|
|
#if defined(__LITTLE_ENDIAN_BITFIELD)
|
| 847 |
|
|
unsigned error_code :7; /* Current of deferred errors */
|
| 848 |
|
|
unsigned valid :1; /* The information field conforms to QIC-157C */
|
| 849 |
|
|
__u8 reserved1 :8; /* Segment Number - Reserved */
|
| 850 |
|
|
unsigned sense_key :4; /* Sense Key */
|
| 851 |
|
|
unsigned reserved2_4 :1; /* Reserved */
|
| 852 |
|
|
unsigned ili :1; /* Incorrect Length Indicator */
|
| 853 |
|
|
unsigned eom :1; /* End Of Medium */
|
| 854 |
|
|
unsigned filemark :1; /* Filemark */
|
| 855 |
|
|
#elif defined(__BIG_ENDIAN_BITFIELD)
|
| 856 |
|
|
unsigned valid :1;
|
| 857 |
|
|
unsigned error_code :7;
|
| 858 |
|
|
__u8 reserved1 :8;
|
| 859 |
|
|
unsigned filemark :1;
|
| 860 |
|
|
unsigned eom :1;
|
| 861 |
|
|
unsigned ili :1;
|
| 862 |
|
|
unsigned reserved2_4 :1;
|
| 863 |
|
|
unsigned sense_key :4;
|
| 864 |
|
|
#else
|
| 865 |
|
|
#error "Please fix <asm/byteorder.h>"
|
| 866 |
|
|
#endif
|
| 867 |
|
|
__u32 information __attribute__ ((packed));
|
| 868 |
|
|
__u8 asl; /* Additional sense length (n-7) */
|
| 869 |
|
|
__u32 command_specific; /* Additional command specific information */
|
| 870 |
|
|
__u8 asc; /* Additional Sense Code */
|
| 871 |
|
|
__u8 ascq; /* Additional Sense Code Qualifier */
|
| 872 |
|
|
__u8 replaceable_unit_code; /* Field Replaceable Unit Code */
|
| 873 |
|
|
unsigned sk_specific1 :7; /* Sense Key Specific */
|
| 874 |
|
|
unsigned sksv :1; /* Sense Key Specific information is valid */
|
| 875 |
|
|
__u8 sk_specific2; /* Sense Key Specific */
|
| 876 |
|
|
__u8 sk_specific3; /* Sense Key Specific */
|
| 877 |
|
|
__u8 pad[2]; /* Padding to 20 bytes */
|
| 878 |
|
|
} idetape_request_sense_result_t;
|
| 879 |
|
|
|
| 880 |
|
|
|
| 881 |
|
|
/*
|
| 882 |
|
|
* Most of our global data which we need to save even as we leave the
|
| 883 |
|
|
* driver due to an interrupt or a timer event is stored in a variable
|
| 884 |
|
|
* of type idetape_tape_t, defined below.
|
| 885 |
|
|
*/
|
| 886 |
|
|
typedef struct {
|
| 887 |
|
|
ide_drive_t *drive;
|
| 888 |
|
|
devfs_handle_t de_r, de_n;
|
| 889 |
|
|
|
| 890 |
|
|
/*
|
| 891 |
|
|
* Since a typical character device operation requires more
|
| 892 |
|
|
* than one packet command, we provide here enough memory
|
| 893 |
|
|
* for the maximum of interconnected packet commands.
|
| 894 |
|
|
* The packet commands are stored in the circular array pc_stack.
|
| 895 |
|
|
* pc_stack_index points to the last used entry, and warps around
|
| 896 |
|
|
* to the start when we get to the last array entry.
|
| 897 |
|
|
*
|
| 898 |
|
|
* pc points to the current processed packet command.
|
| 899 |
|
|
*
|
| 900 |
|
|
* failed_pc points to the last failed packet command, or contains
|
| 901 |
|
|
* NULL if we do not need to retry any packet command. This is
|
| 902 |
|
|
* required since an additional packet command is needed before the
|
| 903 |
|
|
* retry, to get detailed information on what went wrong.
|
| 904 |
|
|
*/
|
| 905 |
|
|
/* Current packet command */
|
| 906 |
|
|
idetape_pc_t *pc;
|
| 907 |
|
|
/* Last failed packet command */
|
| 908 |
|
|
idetape_pc_t *failed_pc;
|
| 909 |
|
|
/* Packet command stack */
|
| 910 |
|
|
idetape_pc_t pc_stack[IDETAPE_PC_STACK];
|
| 911 |
|
|
/* Next free packet command storage space */
|
| 912 |
|
|
int pc_stack_index;
|
| 913 |
|
|
struct request rq_stack[IDETAPE_PC_STACK];
|
| 914 |
|
|
/* We implement a circular array */
|
| 915 |
|
|
int rq_stack_index;
|
| 916 |
|
|
|
| 917 |
|
|
/*
|
| 918 |
|
|
* DSC polling variables.
|
| 919 |
|
|
*
|
| 920 |
|
|
* While polling for DSC we use postponed_rq to postpone the
|
| 921 |
|
|
* current request so that ide.c will be able to service
|
| 922 |
|
|
* pending requests on the other device. Note that at most
|
| 923 |
|
|
* we will have only one DSC (usually data transfer) request
|
| 924 |
|
|
* in the device request queue. Additional requests can be
|
| 925 |
|
|
* queued in our internal pipeline, but they will be visible
|
| 926 |
|
|
* to ide.c only one at a time.
|
| 927 |
|
|
*/
|
| 928 |
|
|
struct request *postponed_rq;
|
| 929 |
|
|
/* The time in which we started polling for DSC */
|
| 930 |
|
|
unsigned long dsc_polling_start;
|
| 931 |
|
|
/* Timer used to poll for dsc */
|
| 932 |
|
|
struct timer_list dsc_timer;
|
| 933 |
|
|
/* Read/Write dsc polling frequency */
|
| 934 |
|
|
unsigned long best_dsc_rw_frequency;
|
| 935 |
|
|
/* The current polling frequency */
|
| 936 |
|
|
unsigned long dsc_polling_frequency;
|
| 937 |
|
|
/* Maximum waiting time */
|
| 938 |
|
|
unsigned long dsc_timeout;
|
| 939 |
|
|
|
| 940 |
|
|
/*
|
| 941 |
|
|
* Read position information
|
| 942 |
|
|
*/
|
| 943 |
|
|
u8 partition;
|
| 944 |
|
|
/* Current block */
|
| 945 |
|
|
unsigned int first_frame_position;
|
| 946 |
|
|
unsigned int last_frame_position;
|
| 947 |
|
|
unsigned int blocks_in_buffer;
|
| 948 |
|
|
|
| 949 |
|
|
/*
|
| 950 |
|
|
* Last error information
|
| 951 |
|
|
*/
|
| 952 |
|
|
u8 sense_key, asc, ascq;
|
| 953 |
|
|
|
| 954 |
|
|
/*
|
| 955 |
|
|
* Character device operation
|
| 956 |
|
|
*/
|
| 957 |
|
|
unsigned int minor;
|
| 958 |
|
|
/* device name */
|
| 959 |
|
|
char name[4];
|
| 960 |
|
|
/* Current character device data transfer direction */
|
| 961 |
|
|
idetape_chrdev_direction_t chrdev_direction;
|
| 962 |
|
|
|
| 963 |
|
|
/*
|
| 964 |
|
|
* Device information
|
| 965 |
|
|
*/
|
| 966 |
|
|
/* Usually 512 or 1024 bytes */
|
| 967 |
|
|
unsigned short tape_block_size;
|
| 968 |
|
|
int user_bs_factor;
|
| 969 |
|
|
/* Copy of the tape's Capabilities and Mechanical Page */
|
| 970 |
|
|
idetape_capabilities_page_t capabilities;
|
| 971 |
|
|
|
| 972 |
|
|
/*
|
| 973 |
|
|
* Active data transfer request parameters.
|
| 974 |
|
|
*
|
| 975 |
|
|
* At most, there is only one ide-tape originated data transfer
|
| 976 |
|
|
* request in the device request queue. This allows ide.c to
|
| 977 |
|
|
* easily service requests from the other device when we
|
| 978 |
|
|
* postpone our active request. In the pipelined operation
|
| 979 |
|
|
* mode, we use our internal pipeline structure to hold
|
| 980 |
|
|
* more data requests.
|
| 981 |
|
|
*
|
| 982 |
|
|
* The data buffer size is chosen based on the tape's
|
| 983 |
|
|
* recommendation.
|
| 984 |
|
|
*/
|
| 985 |
|
|
/* Pointer to the request, waiting in the device request queue */
|
| 986 |
|
|
struct request *active_data_request;
|
| 987 |
|
|
/* Data buffer size (chosen based on the tape's recommendation */
|
| 988 |
|
|
int stage_size;
|
| 989 |
|
|
idetape_stage_t *merge_stage;
|
| 990 |
|
|
int merge_stage_size;
|
| 991 |
|
|
struct buffer_head *bh;
|
| 992 |
|
|
char *b_data;
|
| 993 |
|
|
int b_count;
|
| 994 |
|
|
|
| 995 |
|
|
/*
|
| 996 |
|
|
* Pipeline parameters.
|
| 997 |
|
|
*
|
| 998 |
|
|
* To accomplish non-pipelined mode, we simply set the following
|
| 999 |
|
|
* variables to zero (or NULL, where appropriate).
|
| 1000 |
|
|
*/
|
| 1001 |
|
|
/* Number of currently used stages */
|
| 1002 |
|
|
int nr_stages;
|
| 1003 |
|
|
/* Number of pending stages */
|
| 1004 |
|
|
int nr_pending_stages;
|
| 1005 |
|
|
/* We will not allocate more than this number of stages */
|
| 1006 |
|
|
int max_stages, min_pipeline, max_pipeline;
|
| 1007 |
|
|
/* The first stage which will be removed from the pipeline */
|
| 1008 |
|
|
idetape_stage_t *first_stage;
|
| 1009 |
|
|
/* The currently active stage */
|
| 1010 |
|
|
idetape_stage_t *active_stage;
|
| 1011 |
|
|
/* Will be serviced after the currently active request */
|
| 1012 |
|
|
idetape_stage_t *next_stage;
|
| 1013 |
|
|
/* New requests will be added to the pipeline here */
|
| 1014 |
|
|
idetape_stage_t *last_stage;
|
| 1015 |
|
|
/* Optional free stage which we can use */
|
| 1016 |
|
|
idetape_stage_t *cache_stage;
|
| 1017 |
|
|
int pages_per_stage;
|
| 1018 |
|
|
/* Wasted space in each stage */
|
| 1019 |
|
|
int excess_bh_size;
|
| 1020 |
|
|
|
| 1021 |
|
|
/* Status/Action flags: long for set_bit */
|
| 1022 |
|
|
unsigned long flags;
|
| 1023 |
|
|
/* protects the ide-tape queue */
|
| 1024 |
|
|
spinlock_t spinlock;
|
| 1025 |
|
|
|
| 1026 |
|
|
/*
|
| 1027 |
|
|
* Measures average tape speed
|
| 1028 |
|
|
*/
|
| 1029 |
|
|
unsigned long avg_time;
|
| 1030 |
|
|
int avg_size;
|
| 1031 |
|
|
int avg_speed;
|
| 1032 |
|
|
|
| 1033 |
|
|
/* last sense information */
|
| 1034 |
|
|
idetape_request_sense_result_t sense;
|
| 1035 |
|
|
|
| 1036 |
|
|
char vendor_id[10];
|
| 1037 |
|
|
char product_id[18];
|
| 1038 |
|
|
char firmware_revision[6];
|
| 1039 |
|
|
int firmware_revision_num;
|
| 1040 |
|
|
|
| 1041 |
|
|
/* the door is currently locked */
|
| 1042 |
|
|
int door_locked;
|
| 1043 |
|
|
|
| 1044 |
|
|
/*
|
| 1045 |
|
|
* OnStream flags
|
| 1046 |
|
|
*/
|
| 1047 |
|
|
/* the tape is an OnStream tape */
|
| 1048 |
|
|
int onstream;
|
| 1049 |
|
|
/* OnStream raw access (32.5KB block size) */
|
| 1050 |
|
|
int raw;
|
| 1051 |
|
|
/* current number of frames in internal buffer */
|
| 1052 |
|
|
int cur_frames;
|
| 1053 |
|
|
/* max number of frames in internal buffer */
|
| 1054 |
|
|
int max_frames;
|
| 1055 |
|
|
/* logical block number */
|
| 1056 |
|
|
int logical_blk_num;
|
| 1057 |
|
|
/* write pass counter */
|
| 1058 |
|
|
__u16 wrt_pass_cntr;
|
| 1059 |
|
|
/* update frame counter */
|
| 1060 |
|
|
__u32 update_frame_cntr;
|
| 1061 |
|
|
struct completion *waiting;
|
| 1062 |
|
|
/* write error recovery active */
|
| 1063 |
|
|
int onstream_write_error;
|
| 1064 |
|
|
/* header frame verified ok */
|
| 1065 |
|
|
int header_ok;
|
| 1066 |
|
|
/* reading linux-specifc media */
|
| 1067 |
|
|
int linux_media;
|
| 1068 |
|
|
int linux_media_version;
|
| 1069 |
|
|
/* application signature */
|
| 1070 |
|
|
char application_sig[5];
|
| 1071 |
|
|
int filemark_cnt;
|
| 1072 |
|
|
int first_mark_addr;
|
| 1073 |
|
|
int last_mark_addr;
|
| 1074 |
|
|
int eod_frame_addr;
|
| 1075 |
|
|
unsigned long cmd_start_time;
|
| 1076 |
|
|
unsigned long max_cmd_time;
|
| 1077 |
|
|
unsigned capacity;
|
| 1078 |
|
|
|
| 1079 |
|
|
/*
|
| 1080 |
|
|
* Optimize the number of "buffer filling"
|
| 1081 |
|
|
* mode sense commands.
|
| 1082 |
|
|
*/
|
| 1083 |
|
|
/* last time in which we issued fill cmd */
|
| 1084 |
|
|
unsigned long last_buffer_fill;
|
| 1085 |
|
|
/* buffer fill command requested */
|
| 1086 |
|
|
int req_buffer_fill;
|
| 1087 |
|
|
int writes_since_buffer_fill;
|
| 1088 |
|
|
int reads_since_buffer_fill;
|
| 1089 |
|
|
|
| 1090 |
|
|
/*
|
| 1091 |
|
|
* Limit the number of times a request can
|
| 1092 |
|
|
* be postponed, to avoid an infinite postpone
|
| 1093 |
|
|
* deadlock.
|
| 1094 |
|
|
*/
|
| 1095 |
|
|
/* request postpone count limit */
|
| 1096 |
|
|
int postpone_cnt;
|
| 1097 |
|
|
|
| 1098 |
|
|
/*
|
| 1099 |
|
|
* Measures number of frames:
|
| 1100 |
|
|
*
|
| 1101 |
|
|
* 1. written/read to/from the driver pipeline (pipeline_head).
|
| 1102 |
|
|
* 2. written/read to/from the tape buffers (buffer_head).
|
| 1103 |
|
|
* 3. written/read by the tape to/from the media (tape_head).
|
| 1104 |
|
|
*/
|
| 1105 |
|
|
int pipeline_head;
|
| 1106 |
|
|
int buffer_head;
|
| 1107 |
|
|
int tape_head;
|
| 1108 |
|
|
int last_tape_head;
|
| 1109 |
|
|
|
| 1110 |
|
|
/*
|
| 1111 |
|
|
* Speed control at the tape buffers input/output
|
| 1112 |
|
|
*/
|
| 1113 |
|
|
unsigned long insert_time;
|
| 1114 |
|
|
int insert_size;
|
| 1115 |
|
|
int insert_speed;
|
| 1116 |
|
|
int max_insert_speed;
|
| 1117 |
|
|
int measure_insert_time;
|
| 1118 |
|
|
|
| 1119 |
|
|
/*
|
| 1120 |
|
|
* Measure tape still time, in milliseconds
|
| 1121 |
|
|
*/
|
| 1122 |
|
|
unsigned long tape_still_time_begin;
|
| 1123 |
|
|
int tape_still_time;
|
| 1124 |
|
|
|
| 1125 |
|
|
/*
|
| 1126 |
|
|
* Speed regulation negative feedback loop
|
| 1127 |
|
|
*/
|
| 1128 |
|
|
int speed_control;
|
| 1129 |
|
|
int pipeline_head_speed;
|
| 1130 |
|
|
int controlled_pipeline_head_speed;
|
| 1131 |
|
|
int uncontrolled_pipeline_head_speed;
|
| 1132 |
|
|
int controlled_last_pipeline_head;
|
| 1133 |
|
|
int uncontrolled_last_pipeline_head;
|
| 1134 |
|
|
unsigned long uncontrolled_pipeline_head_time;
|
| 1135 |
|
|
unsigned long controlled_pipeline_head_time;
|
| 1136 |
|
|
int controlled_previous_pipeline_head;
|
| 1137 |
|
|
int uncontrolled_previous_pipeline_head;
|
| 1138 |
|
|
unsigned long controlled_previous_head_time;
|
| 1139 |
|
|
unsigned long uncontrolled_previous_head_time;
|
| 1140 |
|
|
int restart_speed_control_req;
|
| 1141 |
|
|
|
| 1142 |
|
|
/*
|
| 1143 |
|
|
* Debug_level determines amount of debugging output;
|
| 1144 |
|
|
* can be changed using /proc/ide/hdx/settings
|
| 1145 |
|
|
* 0 : almost no debugging output
|
| 1146 |
|
|
* 1 : 0+output errors only
|
| 1147 |
|
|
* 2 : 1+output all sensekey/asc
|
| 1148 |
|
|
* 3 : 2+follow all chrdev related procedures
|
| 1149 |
|
|
* 4 : 3+follow all procedures
|
| 1150 |
|
|
* 5 : 4+include pc_stack rq_stack info
|
| 1151 |
|
|
* 6 : 5+USE_COUNT updates
|
| 1152 |
|
|
*/
|
| 1153 |
|
|
int debug_level;
|
| 1154 |
|
|
} idetape_tape_t;
|
| 1155 |
|
|
|
| 1156 |
|
|
/*
|
| 1157 |
|
|
* Tape door status
|
| 1158 |
|
|
*/
|
| 1159 |
|
|
#define DOOR_UNLOCKED 0
|
| 1160 |
|
|
#define DOOR_LOCKED 1
|
| 1161 |
|
|
#define DOOR_EXPLICITLY_LOCKED 2
|
| 1162 |
|
|
|
| 1163 |
|
|
/*
|
| 1164 |
|
|
* Tape flag bits values.
|
| 1165 |
|
|
*/
|
| 1166 |
|
|
#define IDETAPE_IGNORE_DSC 0
|
| 1167 |
|
|
#define IDETAPE_ADDRESS_VALID 1 /* 0 When the tape position is unknown */
|
| 1168 |
|
|
#define IDETAPE_BUSY 2 /* Device already opened */
|
| 1169 |
|
|
#define IDETAPE_PIPELINE_ERROR 3 /* Error detected in a pipeline stage */
|
| 1170 |
|
|
#define IDETAPE_DETECT_BS 4 /* Attempt to auto-detect the current user block size */
|
| 1171 |
|
|
#define IDETAPE_FILEMARK 5 /* Currently on a filemark */
|
| 1172 |
|
|
#define IDETAPE_DRQ_INTERRUPT 6 /* DRQ interrupt device */
|
| 1173 |
|
|
#define IDETAPE_READ_ERROR 7
|
| 1174 |
|
|
#define IDETAPE_PIPELINE_ACTIVE 8 /* pipeline active */
|
| 1175 |
|
|
|
| 1176 |
|
|
/*
|
| 1177 |
|
|
* Supported ATAPI tape drives packet commands
|
| 1178 |
|
|
*/
|
| 1179 |
|
|
#define IDETAPE_TEST_UNIT_READY_CMD 0x00
|
| 1180 |
|
|
#define IDETAPE_REWIND_CMD 0x01
|
| 1181 |
|
|
#define IDETAPE_REQUEST_SENSE_CMD 0x03
|
| 1182 |
|
|
#define IDETAPE_READ_CMD 0x08
|
| 1183 |
|
|
#define IDETAPE_WRITE_CMD 0x0a
|
| 1184 |
|
|
#define IDETAPE_WRITE_FILEMARK_CMD 0x10
|
| 1185 |
|
|
#define IDETAPE_SPACE_CMD 0x11
|
| 1186 |
|
|
#define IDETAPE_INQUIRY_CMD 0x12
|
| 1187 |
|
|
#define IDETAPE_ERASE_CMD 0x19
|
| 1188 |
|
|
#define IDETAPE_MODE_SENSE_CMD 0x1a
|
| 1189 |
|
|
#define IDETAPE_MODE_SELECT_CMD 0x15
|
| 1190 |
|
|
#define IDETAPE_LOAD_UNLOAD_CMD 0x1b
|
| 1191 |
|
|
#define IDETAPE_PREVENT_CMD 0x1e
|
| 1192 |
|
|
#define IDETAPE_LOCATE_CMD 0x2b
|
| 1193 |
|
|
#define IDETAPE_READ_POSITION_CMD 0x34
|
| 1194 |
|
|
#define IDETAPE_READ_BUFFER_CMD 0x3c
|
| 1195 |
|
|
#define IDETAPE_SET_SPEED_CMD 0xbb
|
| 1196 |
|
|
|
| 1197 |
|
|
/*
|
| 1198 |
|
|
* Some defines for the READ BUFFER command
|
| 1199 |
|
|
*/
|
| 1200 |
|
|
#define IDETAPE_RETRIEVE_FAULTY_BLOCK 6
|
| 1201 |
|
|
|
| 1202 |
|
|
/*
|
| 1203 |
|
|
* Some defines for the SPACE command
|
| 1204 |
|
|
*/
|
| 1205 |
|
|
#define IDETAPE_SPACE_OVER_FILEMARK 1
|
| 1206 |
|
|
#define IDETAPE_SPACE_TO_EOD 3
|
| 1207 |
|
|
|
| 1208 |
|
|
/*
|
| 1209 |
|
|
* Some defines for the LOAD UNLOAD command
|
| 1210 |
|
|
*/
|
| 1211 |
|
|
#define IDETAPE_LU_LOAD_MASK 1
|
| 1212 |
|
|
#define IDETAPE_LU_RETENSION_MASK 2
|
| 1213 |
|
|
#define IDETAPE_LU_EOT_MASK 4
|
| 1214 |
|
|
|
| 1215 |
|
|
/*
|
| 1216 |
|
|
* Special requests for our block device strategy routine.
|
| 1217 |
|
|
*
|
| 1218 |
|
|
* In order to service a character device command, we add special
|
| 1219 |
|
|
* requests to the tail of our block device request queue and wait
|
| 1220 |
|
|
* for their completion.
|
| 1221 |
|
|
*
|
| 1222 |
|
|
*/
|
| 1223 |
|
|
#define IDETAPE_FIRST_RQ 90
|
| 1224 |
|
|
|
| 1225 |
|
|
/*
|
| 1226 |
|
|
* IDETAPE_PC_RQ is used to queue a packet command in the request queue.
|
| 1227 |
|
|
*/
|
| 1228 |
|
|
#define IDETAPE_PC_RQ1 90
|
| 1229 |
|
|
#define IDETAPE_PC_RQ2 91
|
| 1230 |
|
|
|
| 1231 |
|
|
/*
|
| 1232 |
|
|
* IDETAPE_READ_RQ and IDETAPE_WRITE_RQ are used by our
|
| 1233 |
|
|
* character device interface to request read/write operations from
|
| 1234 |
|
|
* our block device interface.
|
| 1235 |
|
|
*/
|
| 1236 |
|
|
#define IDETAPE_READ_RQ 92
|
| 1237 |
|
|
#define IDETAPE_WRITE_RQ 93
|
| 1238 |
|
|
#define IDETAPE_ABORTED_WRITE_RQ 94
|
| 1239 |
|
|
#define IDETAPE_ABORTED_READ_RQ 95
|
| 1240 |
|
|
#define IDETAPE_READ_BUFFER_RQ 96
|
| 1241 |
|
|
|
| 1242 |
|
|
#define IDETAPE_LAST_RQ 96
|
| 1243 |
|
|
|
| 1244 |
|
|
/*
|
| 1245 |
|
|
* A macro which can be used to check if a we support a given
|
| 1246 |
|
|
* request command.
|
| 1247 |
|
|
*/
|
| 1248 |
|
|
#define IDETAPE_RQ_CMD(cmd) ((cmd >= IDETAPE_FIRST_RQ) && (cmd <= IDETAPE_LAST_RQ))
|
| 1249 |
|
|
|
| 1250 |
|
|
/*
|
| 1251 |
|
|
* Error codes which are returned in rq->errors to the higher part
|
| 1252 |
|
|
* of the driver.
|
| 1253 |
|
|
*/
|
| 1254 |
|
|
#define IDETAPE_ERROR_GENERAL 101
|
| 1255 |
|
|
#define IDETAPE_ERROR_FILEMARK 102
|
| 1256 |
|
|
#define IDETAPE_ERROR_EOD 103
|
| 1257 |
|
|
|
| 1258 |
|
|
/*
|
| 1259 |
|
|
* idetape_chrdev_t provides the link between out character device
|
| 1260 |
|
|
* interface and our block device interface and the corresponding
|
| 1261 |
|
|
* ide_drive_t structure.
|
| 1262 |
|
|
*/
|
| 1263 |
|
|
typedef struct {
|
| 1264 |
|
|
ide_drive_t *drive;
|
| 1265 |
|
|
} idetape_chrdev_t;
|
| 1266 |
|
|
|
| 1267 |
|
|
/*
|
| 1268 |
|
|
* The following is used to format the general configuration word of
|
| 1269 |
|
|
* the ATAPI IDENTIFY DEVICE command.
|
| 1270 |
|
|
*/
|
| 1271 |
|
|
struct idetape_id_gcw {
|
| 1272 |
|
|
unsigned packet_size :2; /* Packet Size */
|
| 1273 |
|
|
unsigned reserved234 :3; /* Reserved */
|
| 1274 |
|
|
unsigned drq_type :2; /* Command packet DRQ type */
|
| 1275 |
|
|
unsigned removable :1; /* Removable media */
|
| 1276 |
|
|
unsigned device_type :5; /* Device type */
|
| 1277 |
|
|
unsigned reserved13 :1; /* Reserved */
|
| 1278 |
|
|
unsigned protocol :2; /* Protocol type */
|
| 1279 |
|
|
};
|
| 1280 |
|
|
|
| 1281 |
|
|
/*
|
| 1282 |
|
|
* INQUIRY packet command - Data Format (From Table 6-8 of QIC-157C)
|
| 1283 |
|
|
*/
|
| 1284 |
|
|
typedef struct {
|
| 1285 |
|
|
unsigned device_type :5; /* Peripheral Device Type */
|
| 1286 |
|
|
unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
|
| 1287 |
|
|
unsigned reserved1_6t0 :7; /* Reserved */
|
| 1288 |
|
|
unsigned rmb :1; /* Removable Medium Bit */
|
| 1289 |
|
|
unsigned ansi_version :3; /* ANSI Version */
|
| 1290 |
|
|
unsigned ecma_version :3; /* ECMA Version */
|
| 1291 |
|
|
unsigned iso_version :2; /* ISO Version */
|
| 1292 |
|
|
unsigned response_format :4; /* Response Data Format */
|
| 1293 |
|
|
unsigned reserved3_45 :2; /* Reserved */
|
| 1294 |
|
|
unsigned reserved3_6 :1; /* TrmIOP - Reserved */
|
| 1295 |
|
|
unsigned reserved3_7 :1; /* AENC - Reserved */
|
| 1296 |
|
|
__u8 additional_length; /* Additional Length (total_length-4) */
|
| 1297 |
|
|
__u8 rsv5, rsv6, rsv7; /* Reserved */
|
| 1298 |
|
|
__u8 vendor_id[8]; /* Vendor Identification */
|
| 1299 |
|
|
__u8 product_id[16]; /* Product Identification */
|
| 1300 |
|
|
__u8 revision_level[4]; /* Revision Level */
|
| 1301 |
|
|
__u8 vendor_specific[20]; /* Vendor Specific - Optional */
|
| 1302 |
|
|
__u8 reserved56t95[40]; /* Reserved - Optional */
|
| 1303 |
|
|
/* Additional information may be returned */
|
| 1304 |
|
|
} idetape_inquiry_result_t;
|
| 1305 |
|
|
|
| 1306 |
|
|
/*
|
| 1307 |
|
|
* READ POSITION packet command - Data Format (From Table 6-57)
|
| 1308 |
|
|
*/
|
| 1309 |
|
|
typedef struct {
|
| 1310 |
|
|
unsigned reserved0_10 :2; /* Reserved */
|
| 1311 |
|
|
unsigned bpu :1; /* Block Position Unknown */
|
| 1312 |
|
|
unsigned reserved0_543 :3; /* Reserved */
|
| 1313 |
|
|
unsigned eop :1; /* End Of Partition */
|
| 1314 |
|
|
unsigned bop :1; /* Beginning Of Partition */
|
| 1315 |
|
|
u8 partition; /* Partition Number */
|
| 1316 |
|
|
u8 reserved2, reserved3; /* Reserved */
|
| 1317 |
|
|
u32 first_block; /* First Block Location */
|
| 1318 |
|
|
u32 last_block; /* Last Block Location (Optional) */
|
| 1319 |
|
|
u8 reserved12; /* Reserved */
|
| 1320 |
|
|
u8 blocks_in_buffer[3]; /* Blocks In Buffer - (Optional) */
|
| 1321 |
|
|
u32 bytes_in_buffer; /* Bytes In Buffer (Optional) */
|
| 1322 |
|
|
} idetape_read_position_result_t;
|
| 1323 |
|
|
|
| 1324 |
|
|
/*
|
| 1325 |
|
|
* Follows structures which are related to the SELECT SENSE / MODE SENSE
|
| 1326 |
|
|
* packet commands. Those packet commands are still not supported
|
| 1327 |
|
|
* by ide-tape.
|
| 1328 |
|
|
*/
|
| 1329 |
|
|
#define IDETAPE_BLOCK_DESCRIPTOR 0
|
| 1330 |
|
|
#define IDETAPE_CAPABILITIES_PAGE 0x2a
|
| 1331 |
|
|
#define IDETAPE_PARAMTR_PAGE 0x2b /* Onstream DI-x0 only */
|
| 1332 |
|
|
#define IDETAPE_BLOCK_SIZE_PAGE 0x30
|
| 1333 |
|
|
#define IDETAPE_BUFFER_FILLING_PAGE 0x33
|
| 1334 |
|
|
|
| 1335 |
|
|
/*
|
| 1336 |
|
|
* Mode Parameter Header for the MODE SENSE packet command
|
| 1337 |
|
|
*/
|
| 1338 |
|
|
typedef struct {
|
| 1339 |
|
|
__u8 mode_data_length; /* Length of the following data transfer */
|
| 1340 |
|
|
__u8 medium_type; /* Medium Type */
|
| 1341 |
|
|
__u8 dsp; /* Device Specific Parameter */
|
| 1342 |
|
|
__u8 bdl; /* Block Descriptor Length */
|
| 1343 |
|
|
#if 0
|
| 1344 |
|
|
/* data transfer page */
|
| 1345 |
|
|
__u8 page_code :6;
|
| 1346 |
|
|
__u8 reserved0_6 :1;
|
| 1347 |
|
|
__u8 ps :1; /* parameters saveable */
|
| 1348 |
|
|
__u8 page_length; /* page Length == 0x02 */
|
| 1349 |
|
|
__u8 reserved2;
|
| 1350 |
|
|
__u8 read32k :1; /* 32k blk size (data only) */
|
| 1351 |
|
|
__u8 read32k5 :1; /* 32.5k blk size (data&AUX) */
|
| 1352 |
|
|
__u8 reserved3_23 :2;
|
| 1353 |
|
|
__u8 write32k :1; /* 32k blk size (data only) */
|
| 1354 |
|
|
__u8 write32k5 :1; /* 32.5k blk size (data&AUX) */
|
| 1355 |
|
|
__u8 reserved3_6 :1;
|
| 1356 |
|
|
__u8 streaming :1; /* streaming mode enable */
|
| 1357 |
|
|
#endif
|
| 1358 |
|
|
} idetape_mode_parameter_header_t;
|
| 1359 |
|
|
|
| 1360 |
|
|
/*
|
| 1361 |
|
|
* Mode Parameter Block Descriptor the MODE SENSE packet command
|
| 1362 |
|
|
*
|
| 1363 |
|
|
* Support for block descriptors is optional.
|
| 1364 |
|
|
*/
|
| 1365 |
|
|
typedef struct {
|
| 1366 |
|
|
__u8 density_code; /* Medium density code */
|
| 1367 |
|
|
__u8 blocks[3]; /* Number of blocks */
|
| 1368 |
|
|
__u8 reserved4; /* Reserved */
|
| 1369 |
|
|
__u8 length[3]; /* Block Length */
|
| 1370 |
|
|
} idetape_parameter_block_descriptor_t;
|
| 1371 |
|
|
|
| 1372 |
|
|
/*
|
| 1373 |
|
|
* The Data Compression Page, as returned by the MODE SENSE packet command.
|
| 1374 |
|
|
*/
|
| 1375 |
|
|
typedef struct {
|
| 1376 |
|
|
unsigned page_code :6; /* Page Code - Should be 0xf */
|
| 1377 |
|
|
unsigned reserved0 :1; /* Reserved */
|
| 1378 |
|
|
unsigned ps :1;
|
| 1379 |
|
|
__u8 page_length; /* Page Length - Should be 14 */
|
| 1380 |
|
|
unsigned reserved2 :6; /* Reserved */
|
| 1381 |
|
|
unsigned dcc :1; /* Data Compression Capable */
|
| 1382 |
|
|
unsigned dce :1; /* Data Compression Enable */
|
| 1383 |
|
|
unsigned reserved3 :5; /* Reserved */
|
| 1384 |
|
|
unsigned red :2; /* Report Exception on Decompression */
|
| 1385 |
|
|
unsigned dde :1; /* Data Decompression Enable */
|
| 1386 |
|
|
__u32 ca; /* Compression Algorithm */
|
| 1387 |
|
|
__u32 da; /* Decompression Algorithm */
|
| 1388 |
|
|
__u8 reserved[4]; /* Reserved */
|
| 1389 |
|
|
} idetape_data_compression_page_t;
|
| 1390 |
|
|
|
| 1391 |
|
|
/*
|
| 1392 |
|
|
* The Medium Partition Page, as returned by the MODE SENSE packet command.
|
| 1393 |
|
|
*/
|
| 1394 |
|
|
typedef struct {
|
| 1395 |
|
|
unsigned page_code :6; /* Page Code - Should be 0x11 */
|
| 1396 |
|
|
unsigned reserved1_6 :1; /* Reserved */
|
| 1397 |
|
|
unsigned ps :1;
|
| 1398 |
|
|
__u8 page_length; /* Page Length - Should be 6 */
|
| 1399 |
|
|
__u8 map; /* Maximum Additional Partitions - Should be 0 */
|
| 1400 |
|
|
__u8 apd; /* Additional Partitions Defined - Should be 0 */
|
| 1401 |
|
|
unsigned reserved4_012 :3; /* Reserved */
|
| 1402 |
|
|
unsigned psum :2; /* Should be 0 */
|
| 1403 |
|
|
unsigned idp :1; /* Should be 0 */
|
| 1404 |
|
|
unsigned sdp :1; /* Should be 0 */
|
| 1405 |
|
|
unsigned fdp :1; /* Fixed Data Partitions */
|
| 1406 |
|
|
__u8 mfr; /* Medium Format Recognition */
|
| 1407 |
|
|
__u8 reserved[2]; /* Reserved */
|
| 1408 |
|
|
} idetape_medium_partition_page_t;
|
| 1409 |
|
|
|
| 1410 |
|
|
/*
|
| 1411 |
|
|
* Run time configurable parameters.
|
| 1412 |
|
|
*/
|
| 1413 |
|
|
typedef struct {
|
| 1414 |
|
|
int dsc_rw_frequency;
|
| 1415 |
|
|
int dsc_media_access_frequency;
|
| 1416 |
|
|
int nr_stages;
|
| 1417 |
|
|
} idetape_config_t;
|
| 1418 |
|
|
|
| 1419 |
|
|
/*
|
| 1420 |
|
|
* The variables below are used for the character device interface.
|
| 1421 |
|
|
* Additional state variables are defined in our ide_drive_t structure.
|
| 1422 |
|
|
*/
|
| 1423 |
|
|
static idetape_chrdev_t idetape_chrdevs[MAX_HWIFS * MAX_DRIVES];
|
| 1424 |
|
|
static int idetape_chrdev_present = 0;
|
| 1425 |
|
|
|
| 1426 |
|
|
#if IDETAPE_DEBUG_LOG_VERBOSE
|
| 1427 |
|
|
|
| 1428 |
|
|
/*
|
| 1429 |
|
|
* DO NOT REMOVE, BUILDING A VERBOSE DEBUG SCHEME FOR ATAPI
|
| 1430 |
|
|
*/
|
| 1431 |
|
|
|
| 1432 |
|
|
char *idetape_sense_key_verbose (u8 idetape_sense_key)
|
| 1433 |
|
|
{
|
| 1434 |
|
|
switch (idetape_sense_key) {
|
| 1435 |
|
|
default: {
|
| 1436 |
|
|
char buf[22];
|
| 1437 |
|
|
sprintf(buf, "IDETAPE_SENSE (0x%02x)",
|
| 1438 |
|
|
idetape_sense_key);
|
| 1439 |
|
|
return(buf);
|
| 1440 |
|
|
}
|
| 1441 |
|
|
|
| 1442 |
|
|
}
|
| 1443 |
|
|
}
|
| 1444 |
|
|
|
| 1445 |
|
|
char *idetape_command_key_verbose (u8 idetape_command_key)
|
| 1446 |
|
|
{
|
| 1447 |
|
|
switch (idetape_command_key) {
|
| 1448 |
|
|
case IDETAPE_TEST_UNIT_READY_CMD:
|
| 1449 |
|
|
return("TEST_UNIT_READY_CMD");
|
| 1450 |
|
|
case IDETAPE_REWIND_CMD:
|
| 1451 |
|
|
return("REWIND_CMD");
|
| 1452 |
|
|
case IDETAPE_REQUEST_SENSE_CMD:
|
| 1453 |
|
|
return("REQUEST_SENSE_CMD");
|
| 1454 |
|
|
case IDETAPE_READ_CMD:
|
| 1455 |
|
|
return("READ_CMD");
|
| 1456 |
|
|
case IDETAPE_WRITE_CMD:
|
| 1457 |
|
|
return("WRITE_CMD");
|
| 1458 |
|
|
case IDETAPE_WRITE_FILEMARK_CMD:
|
| 1459 |
|
|
return("WRITE_FILEMARK_CMD");
|
| 1460 |
|
|
case IDETAPE_SPACE_CMD:
|
| 1461 |
|
|
return("SPACE_CMD");
|
| 1462 |
|
|
case IDETAPE_INQUIRY_CMD:
|
| 1463 |
|
|
return("INQUIRY_CMD");
|
| 1464 |
|
|
case IDETAPE_ERASE_CMD:
|
| 1465 |
|
|
return("ERASE_CMD");
|
| 1466 |
|
|
case IDETAPE_MODE_SENSE_CMD:
|
| 1467 |
|
|
return("MODE_SENSE_CMD");
|
| 1468 |
|
|
case IDETAPE_MODE_SELECT_CMD:
|
| 1469 |
|
|
return("MODE_SELECT_CMD");
|
| 1470 |
|
|
case IDETAPE_LOAD_UNLOAD_CMD:
|
| 1471 |
|
|
return("LOAD_UNLOAD_CMD");
|
| 1472 |
|
|
case IDETAPE_PREVENT_CMD:
|
| 1473 |
|
|
return("PREVENT_CMD");
|
| 1474 |
|
|
case IDETAPE_LOCATE_CMD:
|
| 1475 |
|
|
return("LOCATE_CMD");
|
| 1476 |
|
|
case IDETAPE_READ_POSITION_CMD:
|
| 1477 |
|
|
return("READ_POSITION_CMD");
|
| 1478 |
|
|
case IDETAPE_READ_BUFFER_CMD:
|
| 1479 |
|
|
return("READ_BUFFER_CMD");
|
| 1480 |
|
|
case IDETAPE_SET_SPEED_CMD:
|
| 1481 |
|
|
return("SET_SPEED_CMD");
|
| 1482 |
|
|
default: {
|
| 1483 |
|
|
char buf[20];
|
| 1484 |
|
|
sprintf(buf, "CMD (0x%02x)",
|
| 1485 |
|
|
idetape_command_key);
|
| 1486 |
|
|
return(buf);
|
| 1487 |
|
|
}
|
| 1488 |
|
|
}
|
| 1489 |
|
|
}
|
| 1490 |
|
|
#endif /* IDETAPE_DEBUG_LOG_VERBOSE */
|
| 1491 |
|
|
|
| 1492 |
|
|
/*
|
| 1493 |
|
|
* Function declarations
|
| 1494 |
|
|
*
|
| 1495 |
|
|
*/
|
| 1496 |
|
|
static void idetape_onstream_mode_sense_tape_parameter_page(ide_drive_t *drive, int debug);
|
| 1497 |
|
|
static int idetape_chrdev_release (struct inode *inode, struct file *filp);
|
| 1498 |
|
|
static void idetape_write_release (struct inode *inode);
|
| 1499 |
|
|
|
| 1500 |
|
|
/*
|
| 1501 |
|
|
* Too bad. The drive wants to send us data which we are not ready to accept.
|
| 1502 |
|
|
* Just throw it away.
|
| 1503 |
|
|
*/
|
| 1504 |
|
|
static void idetape_discard_data (ide_drive_t *drive, unsigned int bcount)
|
| 1505 |
|
|
{
|
| 1506 |
|
|
while (bcount--)
|
| 1507 |
|
|
(void) HWIF(drive)->INB(IDE_DATA_REG);
|
| 1508 |
|
|
}
|
| 1509 |
|
|
|
| 1510 |
|
|
static void idetape_input_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsigned int bcount)
|
| 1511 |
|
|
{
|
| 1512 |
|
|
struct buffer_head *bh = pc->bh;
|
| 1513 |
|
|
int count;
|
| 1514 |
|
|
|
| 1515 |
|
|
while (bcount) {
|
| 1516 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1517 |
|
|
if (bh == NULL) {
|
| 1518 |
|
|
printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
|
| 1519 |
|
|
__FUNCTION__);
|
| 1520 |
|
|
idetape_discard_data(drive, bcount);
|
| 1521 |
|
|
return;
|
| 1522 |
|
|
}
|
| 1523 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1524 |
|
|
count = IDE_MIN(bh->b_size - atomic_read(&bh->b_count), bcount);
|
| 1525 |
|
|
HWIF(drive)->atapi_input_bytes(drive, bh->b_data + atomic_read(&bh->b_count), count);
|
| 1526 |
|
|
bcount -= count;
|
| 1527 |
|
|
atomic_add(count, &bh->b_count);
|
| 1528 |
|
|
if (atomic_read(&bh->b_count) == bh->b_size) {
|
| 1529 |
|
|
bh = bh->b_reqnext;
|
| 1530 |
|
|
if (bh)
|
| 1531 |
|
|
atomic_set(&bh->b_count, 0);
|
| 1532 |
|
|
}
|
| 1533 |
|
|
}
|
| 1534 |
|
|
pc->bh = bh;
|
| 1535 |
|
|
}
|
| 1536 |
|
|
|
| 1537 |
|
|
static void idetape_output_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsigned int bcount)
|
| 1538 |
|
|
{
|
| 1539 |
|
|
struct buffer_head *bh = pc->bh;
|
| 1540 |
|
|
int count;
|
| 1541 |
|
|
|
| 1542 |
|
|
while (bcount) {
|
| 1543 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1544 |
|
|
if (bh == NULL) {
|
| 1545 |
|
|
printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
|
| 1546 |
|
|
__FUNCTION__);
|
| 1547 |
|
|
return;
|
| 1548 |
|
|
}
|
| 1549 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1550 |
|
|
count = IDE_MIN(pc->b_count, bcount);
|
| 1551 |
|
|
HWIF(drive)->atapi_output_bytes(drive, pc->b_data, count);
|
| 1552 |
|
|
bcount -= count;
|
| 1553 |
|
|
pc->b_data += count;
|
| 1554 |
|
|
pc->b_count -= count;
|
| 1555 |
|
|
if (!pc->b_count) {
|
| 1556 |
|
|
pc->bh = bh = bh->b_reqnext;
|
| 1557 |
|
|
if (bh) {
|
| 1558 |
|
|
pc->b_data = bh->b_data;
|
| 1559 |
|
|
pc->b_count = atomic_read(&bh->b_count);
|
| 1560 |
|
|
}
|
| 1561 |
|
|
}
|
| 1562 |
|
|
}
|
| 1563 |
|
|
}
|
| 1564 |
|
|
|
| 1565 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 1566 |
|
|
static void idetape_update_buffers (idetape_pc_t *pc)
|
| 1567 |
|
|
{
|
| 1568 |
|
|
struct buffer_head *bh = pc->bh;
|
| 1569 |
|
|
int count, bcount = pc->actually_transferred;
|
| 1570 |
|
|
|
| 1571 |
|
|
if (test_bit(PC_WRITING, &pc->flags))
|
| 1572 |
|
|
return;
|
| 1573 |
|
|
while (bcount) {
|
| 1574 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1575 |
|
|
if (bh == NULL) {
|
| 1576 |
|
|
printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
|
| 1577 |
|
|
__FUNCTION__);
|
| 1578 |
|
|
return;
|
| 1579 |
|
|
}
|
| 1580 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1581 |
|
|
count = IDE_MIN(bh->b_size, bcount);
|
| 1582 |
|
|
atomic_set(&bh->b_count, count);
|
| 1583 |
|
|
if (atomic_read(&bh->b_count) == bh->b_size)
|
| 1584 |
|
|
bh = bh->b_reqnext;
|
| 1585 |
|
|
bcount -= count;
|
| 1586 |
|
|
}
|
| 1587 |
|
|
pc->bh = bh;
|
| 1588 |
|
|
}
|
| 1589 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 1590 |
|
|
|
| 1591 |
|
|
/*
|
| 1592 |
|
|
* idetape_next_pc_storage returns a pointer to a place in which we can
|
| 1593 |
|
|
* safely store a packet command, even though we intend to leave the
|
| 1594 |
|
|
* driver. A storage space for a maximum of IDETAPE_PC_STACK packet
|
| 1595 |
|
|
* commands is allocated at initialization time.
|
| 1596 |
|
|
*/
|
| 1597 |
|
|
static idetape_pc_t *idetape_next_pc_storage (ide_drive_t *drive)
|
| 1598 |
|
|
{
|
| 1599 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1600 |
|
|
|
| 1601 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1602 |
|
|
if (tape->debug_level >= 5)
|
| 1603 |
|
|
printk(KERN_INFO "ide-tape: pc_stack_index=%d\n",
|
| 1604 |
|
|
tape->pc_stack_index);
|
| 1605 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1606 |
|
|
if (tape->pc_stack_index == IDETAPE_PC_STACK)
|
| 1607 |
|
|
tape->pc_stack_index=0;
|
| 1608 |
|
|
return (&tape->pc_stack[tape->pc_stack_index++]);
|
| 1609 |
|
|
}
|
| 1610 |
|
|
|
| 1611 |
|
|
/*
|
| 1612 |
|
|
* idetape_next_rq_storage is used along with idetape_next_pc_storage.
|
| 1613 |
|
|
* Since we queue packet commands in the request queue, we need to
|
| 1614 |
|
|
* allocate a request, along with the allocation of a packet command.
|
| 1615 |
|
|
*/
|
| 1616 |
|
|
|
| 1617 |
|
|
/**************************************************************
|
| 1618 |
|
|
* *
|
| 1619 |
|
|
* This should get fixed to use kmalloc(.., GFP_ATOMIC) *
|
| 1620 |
|
|
* followed later on by kfree(). -ml *
|
| 1621 |
|
|
* *
|
| 1622 |
|
|
**************************************************************/
|
| 1623 |
|
|
|
| 1624 |
|
|
static struct request *idetape_next_rq_storage (ide_drive_t *drive)
|
| 1625 |
|
|
{
|
| 1626 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1627 |
|
|
|
| 1628 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1629 |
|
|
if (tape->debug_level >= 5)
|
| 1630 |
|
|
printk(KERN_INFO "ide-tape: rq_stack_index=%d\n",
|
| 1631 |
|
|
tape->rq_stack_index);
|
| 1632 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1633 |
|
|
if (tape->rq_stack_index == IDETAPE_PC_STACK)
|
| 1634 |
|
|
tape->rq_stack_index=0;
|
| 1635 |
|
|
return (&tape->rq_stack[tape->rq_stack_index++]);
|
| 1636 |
|
|
}
|
| 1637 |
|
|
|
| 1638 |
|
|
/*
|
| 1639 |
|
|
* idetape_init_pc initializes a packet command.
|
| 1640 |
|
|
*/
|
| 1641 |
|
|
static void idetape_init_pc (idetape_pc_t *pc)
|
| 1642 |
|
|
{
|
| 1643 |
|
|
memset(pc->c, 0, 12);
|
| 1644 |
|
|
pc->retries = 0;
|
| 1645 |
|
|
pc->flags = 0;
|
| 1646 |
|
|
pc->request_transfer = 0;
|
| 1647 |
|
|
pc->buffer = pc->pc_buffer;
|
| 1648 |
|
|
pc->buffer_size = IDETAPE_PC_BUFFER_SIZE;
|
| 1649 |
|
|
pc->bh = NULL;
|
| 1650 |
|
|
pc->b_data = NULL;
|
| 1651 |
|
|
}
|
| 1652 |
|
|
|
| 1653 |
|
|
/*
|
| 1654 |
|
|
* idetape_analyze_error is called on each failed packet command retry
|
| 1655 |
|
|
* to analyze the request sense. We currently do not utilize this
|
| 1656 |
|
|
* information.
|
| 1657 |
|
|
*/
|
| 1658 |
|
|
static void idetape_analyze_error (ide_drive_t *drive, idetape_request_sense_result_t *result)
|
| 1659 |
|
|
{
|
| 1660 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1661 |
|
|
idetape_pc_t *pc = tape->failed_pc;
|
| 1662 |
|
|
|
| 1663 |
|
|
tape->sense = *result;
|
| 1664 |
|
|
tape->sense_key = result->sense_key;
|
| 1665 |
|
|
tape->asc = result->asc;
|
| 1666 |
|
|
tape->ascq = result->ascq;
|
| 1667 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1668 |
|
|
/*
|
| 1669 |
|
|
* Without debugging, we only log an error if we decided to
|
| 1670 |
|
|
* give up retrying.
|
| 1671 |
|
|
*/
|
| 1672 |
|
|
if (tape->debug_level >= 1)
|
| 1673 |
|
|
printk(KERN_INFO "ide-tape: pc = %x, sense key = %x, "
|
| 1674 |
|
|
"asc = %x, ascq = %x\n",
|
| 1675 |
|
|
pc->c[0], result->sense_key,
|
| 1676 |
|
|
result->asc, result->ascq);
|
| 1677 |
|
|
#if IDETAPE_DEBUG_LOG_VERBOSE
|
| 1678 |
|
|
if (tape->debug_level >= 1)
|
| 1679 |
|
|
printk (KERN_INFO "ide-tape: pc = %s, sense key = %x, "
|
| 1680 |
|
|
"asc = %x, ascq = %x\n",
|
| 1681 |
|
|
idetape_command_key_verbose((u8) pc->c[0]),
|
| 1682 |
|
|
result->sense_key,
|
| 1683 |
|
|
result->asc,
|
| 1684 |
|
|
result->ascq);
|
| 1685 |
|
|
#endif /* IDETAPE_DEBUG_LOG_VERBOSE */
|
| 1686 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1687 |
|
|
|
| 1688 |
|
|
if (tape->onstream && result->sense_key == 2 &&
|
| 1689 |
|
|
result->asc == 0x53 && result->ascq == 2) {
|
| 1690 |
|
|
clear_bit(PC_DMA_ERROR, &pc->flags);
|
| 1691 |
|
|
ide_stall_queue(drive, HZ / 2);
|
| 1692 |
|
|
return;
|
| 1693 |
|
|
}
|
| 1694 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 1695 |
|
|
|
| 1696 |
|
|
/*
|
| 1697 |
|
|
* Correct pc->actually_transferred by asking the tape.
|
| 1698 |
|
|
*/
|
| 1699 |
|
|
if (test_bit(PC_DMA_ERROR, &pc->flags)) {
|
| 1700 |
|
|
pc->actually_transferred = pc->request_transfer - tape->tape_block_size * ntohl(get_unaligned (&result->information));
|
| 1701 |
|
|
idetape_update_buffers(pc);
|
| 1702 |
|
|
}
|
| 1703 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 1704 |
|
|
if (pc->c[0] == IDETAPE_READ_CMD && result->filemark) {
|
| 1705 |
|
|
pc->error = IDETAPE_ERROR_FILEMARK;
|
| 1706 |
|
|
set_bit(PC_ABORT, &pc->flags);
|
| 1707 |
|
|
}
|
| 1708 |
|
|
if (pc->c[0] == IDETAPE_WRITE_CMD) {
|
| 1709 |
|
|
if (result->eom || (result->sense_key == 0xd &&
|
| 1710 |
|
|
result->asc == 0x0 && result->ascq == 0x2)) {
|
| 1711 |
|
|
pc->error = IDETAPE_ERROR_EOD;
|
| 1712 |
|
|
set_bit(PC_ABORT, &pc->flags);
|
| 1713 |
|
|
}
|
| 1714 |
|
|
}
|
| 1715 |
|
|
if (pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD) {
|
| 1716 |
|
|
if (result->sense_key == 8) {
|
| 1717 |
|
|
pc->error = IDETAPE_ERROR_EOD;
|
| 1718 |
|
|
set_bit(PC_ABORT, &pc->flags);
|
| 1719 |
|
|
}
|
| 1720 |
|
|
if (!test_bit(PC_ABORT, &pc->flags) &&
|
| 1721 |
|
|
(tape->onstream || pc->actually_transferred))
|
| 1722 |
|
|
pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
|
| 1723 |
|
|
}
|
| 1724 |
|
|
}
|
| 1725 |
|
|
|
| 1726 |
|
|
/*
|
| 1727 |
|
|
* idetape_active_next_stage will declare the next stage as "active".
|
| 1728 |
|
|
*/
|
| 1729 |
|
|
static void idetape_active_next_stage (ide_drive_t *drive)
|
| 1730 |
|
|
{
|
| 1731 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1732 |
|
|
idetape_stage_t *stage = tape->next_stage;
|
| 1733 |
|
|
struct request *rq = &stage->rq;
|
| 1734 |
|
|
|
| 1735 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1736 |
|
|
if (tape->debug_level >= 4)
|
| 1737 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 1738 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1739 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1740 |
|
|
if (stage == NULL) {
|
| 1741 |
|
|
printk(KERN_ERR "ide-tape: bug: Trying to activate a "
|
| 1742 |
|
|
"non existing stage\n");
|
| 1743 |
|
|
return;
|
| 1744 |
|
|
}
|
| 1745 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1746 |
|
|
|
| 1747 |
|
|
rq->buffer = NULL;
|
| 1748 |
|
|
rq->bh = stage->bh;
|
| 1749 |
|
|
tape->active_data_request = rq;
|
| 1750 |
|
|
tape->active_stage = stage;
|
| 1751 |
|
|
tape->next_stage = stage->next;
|
| 1752 |
|
|
}
|
| 1753 |
|
|
|
| 1754 |
|
|
/*
|
| 1755 |
|
|
* idetape_increase_max_pipeline_stages is a part of the feedback
|
| 1756 |
|
|
* loop which tries to find the optimum number of stages. In the
|
| 1757 |
|
|
* feedback loop, we are starting from a minimum maximum number of
|
| 1758 |
|
|
* stages, and if we sense that the pipeline is empty, we try to
|
| 1759 |
|
|
* increase it, until we reach the user compile time memory limit.
|
| 1760 |
|
|
*/
|
| 1761 |
|
|
static void idetape_increase_max_pipeline_stages (ide_drive_t *drive)
|
| 1762 |
|
|
{
|
| 1763 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1764 |
|
|
int increase = (tape->max_pipeline - tape->min_pipeline) / 10;
|
| 1765 |
|
|
|
| 1766 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1767 |
|
|
if (tape->debug_level >= 4)
|
| 1768 |
|
|
printk (KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 1769 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1770 |
|
|
|
| 1771 |
|
|
tape->max_stages += IDE_MAX(increase, 1);
|
| 1772 |
|
|
tape->max_stages = IDE_MAX(tape->max_stages, tape->min_pipeline);
|
| 1773 |
|
|
tape->max_stages = IDE_MIN(tape->max_stages, tape->max_pipeline);
|
| 1774 |
|
|
}
|
| 1775 |
|
|
|
| 1776 |
|
|
/*
|
| 1777 |
|
|
* idetape_kfree_stage calls kfree to completely free a stage, along with
|
| 1778 |
|
|
* its related buffers.
|
| 1779 |
|
|
*/
|
| 1780 |
|
|
static void __idetape_kfree_stage (idetape_stage_t *stage)
|
| 1781 |
|
|
{
|
| 1782 |
|
|
struct buffer_head *prev_bh, *bh = stage->bh;
|
| 1783 |
|
|
int size;
|
| 1784 |
|
|
|
| 1785 |
|
|
while (bh != NULL) {
|
| 1786 |
|
|
if (bh->b_data != NULL) {
|
| 1787 |
|
|
size = (int) bh->b_size;
|
| 1788 |
|
|
while (size > 0) {
|
| 1789 |
|
|
free_page((unsigned long) bh->b_data);
|
| 1790 |
|
|
size -= PAGE_SIZE;
|
| 1791 |
|
|
bh->b_data += PAGE_SIZE;
|
| 1792 |
|
|
}
|
| 1793 |
|
|
}
|
| 1794 |
|
|
prev_bh = bh;
|
| 1795 |
|
|
bh = bh->b_reqnext;
|
| 1796 |
|
|
kfree(prev_bh);
|
| 1797 |
|
|
}
|
| 1798 |
|
|
kfree(stage);
|
| 1799 |
|
|
}
|
| 1800 |
|
|
|
| 1801 |
|
|
static void idetape_kfree_stage (idetape_tape_t *tape, idetape_stage_t *stage)
|
| 1802 |
|
|
{
|
| 1803 |
|
|
__idetape_kfree_stage(stage);
|
| 1804 |
|
|
}
|
| 1805 |
|
|
|
| 1806 |
|
|
/*
|
| 1807 |
|
|
* idetape_remove_stage_head removes tape->first_stage from the pipeline.
|
| 1808 |
|
|
* The caller should avoid race conditions.
|
| 1809 |
|
|
*/
|
| 1810 |
|
|
static void idetape_remove_stage_head (ide_drive_t *drive)
|
| 1811 |
|
|
{
|
| 1812 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1813 |
|
|
idetape_stage_t *stage;
|
| 1814 |
|
|
|
| 1815 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1816 |
|
|
if (tape->debug_level >= 4)
|
| 1817 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 1818 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1819 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1820 |
|
|
if (tape->first_stage == NULL) {
|
| 1821 |
|
|
printk(KERN_ERR "ide-tape: bug: tape->first_stage is NULL\n");
|
| 1822 |
|
|
return;
|
| 1823 |
|
|
}
|
| 1824 |
|
|
if (tape->active_stage == tape->first_stage) {
|
| 1825 |
|
|
printk(KERN_ERR "ide-tape: bug: Trying to free our "
|
| 1826 |
|
|
"active pipeline stage\n");
|
| 1827 |
|
|
return;
|
| 1828 |
|
|
}
|
| 1829 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1830 |
|
|
stage = tape->first_stage;
|
| 1831 |
|
|
tape->first_stage = stage->next;
|
| 1832 |
|
|
idetape_kfree_stage(tape, stage);
|
| 1833 |
|
|
tape->nr_stages--;
|
| 1834 |
|
|
if (tape->first_stage == NULL) {
|
| 1835 |
|
|
tape->last_stage = NULL;
|
| 1836 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 1837 |
|
|
if (tape->next_stage != NULL)
|
| 1838 |
|
|
printk(KERN_ERR "ide-tape: bug: "
|
| 1839 |
|
|
"tape->next_stage != NULL\n");
|
| 1840 |
|
|
if (tape->nr_stages)
|
| 1841 |
|
|
printk(KERN_ERR "ide-tape: bug: nr_stages should "
|
| 1842 |
|
|
"be 0 now\n");
|
| 1843 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 1844 |
|
|
}
|
| 1845 |
|
|
}
|
| 1846 |
|
|
|
| 1847 |
|
|
static void idetape_abort_pipeline (ide_drive_t *drive, idetape_stage_t *last_stage)
|
| 1848 |
|
|
{
|
| 1849 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1850 |
|
|
idetape_stage_t *stage = tape->next_stage;
|
| 1851 |
|
|
idetape_stage_t *nstage;
|
| 1852 |
|
|
|
| 1853 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1854 |
|
|
if (tape->debug_level >= 4)
|
| 1855 |
|
|
printk(KERN_INFO "ide-tape: %s: %s called\n",
|
| 1856 |
|
|
tape->name, __FUNCTION__);
|
| 1857 |
|
|
#endif
|
| 1858 |
|
|
while (stage) {
|
| 1859 |
|
|
nstage = stage->next;
|
| 1860 |
|
|
idetape_kfree_stage(tape, stage);
|
| 1861 |
|
|
--tape->nr_stages;
|
| 1862 |
|
|
--tape->nr_pending_stages;
|
| 1863 |
|
|
stage = nstage;
|
| 1864 |
|
|
}
|
| 1865 |
|
|
tape->last_stage = last_stage;
|
| 1866 |
|
|
if (last_stage)
|
| 1867 |
|
|
last_stage->next = NULL;
|
| 1868 |
|
|
tape->next_stage = NULL;
|
| 1869 |
|
|
}
|
| 1870 |
|
|
|
| 1871 |
|
|
/*
|
| 1872 |
|
|
* idetape_end_request is used to finish servicing a request, and to
|
| 1873 |
|
|
* insert a pending pipeline request into the main device queue.
|
| 1874 |
|
|
*/
|
| 1875 |
|
|
static int idetape_end_request (ide_drive_t *drive, int uptodate)
|
| 1876 |
|
|
{
|
| 1877 |
|
|
struct request *rq = HWGROUP(drive)->rq;
|
| 1878 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1879 |
|
|
unsigned long flags;
|
| 1880 |
|
|
int error;
|
| 1881 |
|
|
int remove_stage = 0;
|
| 1882 |
|
|
idetape_stage_t *active_stage;
|
| 1883 |
|
|
#if ONSTREAM_DEBUG
|
| 1884 |
|
|
idetape_stage_t *stage;
|
| 1885 |
|
|
os_aux_t *aux;
|
| 1886 |
|
|
unsigned char *p;
|
| 1887 |
|
|
#endif
|
| 1888 |
|
|
|
| 1889 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1890 |
|
|
if (tape->debug_level >= 4)
|
| 1891 |
|
|
printk (KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 1892 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1893 |
|
|
|
| 1894 |
|
|
switch (uptodate) {
|
| 1895 |
|
|
case 0: error = IDETAPE_ERROR_GENERAL; break;
|
| 1896 |
|
|
case 1: error = 0; break;
|
| 1897 |
|
|
default: error = uptodate;
|
| 1898 |
|
|
}
|
| 1899 |
|
|
rq->errors = error;
|
| 1900 |
|
|
if (error)
|
| 1901 |
|
|
tape->failed_pc = NULL;
|
| 1902 |
|
|
|
| 1903 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 1904 |
|
|
if (tape->active_data_request == rq) {
|
| 1905 |
|
|
/* The request was a pipelined data transfer request */
|
| 1906 |
|
|
active_stage = tape->active_stage;
|
| 1907 |
|
|
tape->active_stage = NULL;
|
| 1908 |
|
|
tape->active_data_request = NULL;
|
| 1909 |
|
|
tape->nr_pending_stages--;
|
| 1910 |
|
|
if (rq->cmd == IDETAPE_WRITE_RQ) {
|
| 1911 |
|
|
#if ONSTREAM_DEBUG
|
| 1912 |
|
|
if (tape->debug_level >= 2) {
|
| 1913 |
|
|
if (tape->onstream) {
|
| 1914 |
|
|
stage = tape->first_stage;
|
| 1915 |
|
|
aux = stage->aux;
|
| 1916 |
|
|
p = stage->bh->b_data;
|
| 1917 |
|
|
if (ntohl(aux->logical_blk_num) < 11300 && ntohl(aux->logical_blk_num) > 11100)
|
| 1918 |
|
|
printk(KERN_INFO "ide-tape: finished writing logical blk %u (data %x %x %x %x)\n", ntohl(aux->logical_blk_num), *p++, *p++, *p++, *p++);
|
| 1919 |
|
|
}
|
| 1920 |
|
|
}
|
| 1921 |
|
|
#endif
|
| 1922 |
|
|
if (tape->onstream && !tape->raw) {
|
| 1923 |
|
|
if (tape->first_frame_position == OS_DATA_ENDFRAME1) {
|
| 1924 |
|
|
#if ONSTREAM_DEBUG
|
| 1925 |
|
|
if (tape->debug_level >= 2)
|
| 1926 |
|
|
printk("ide-tape: %s: skipping over config partition.\n", tape->name);
|
| 1927 |
|
|
#endif
|
| 1928 |
|
|
tape->onstream_write_error = OS_PART_ERROR;
|
| 1929 |
|
|
if (tape->waiting) {
|
| 1930 |
|
|
rq->waiting = NULL;
|
| 1931 |
|
|
complete(tape->waiting);
|
| 1932 |
|
|
}
|
| 1933 |
|
|
}
|
| 1934 |
|
|
}
|
| 1935 |
|
|
remove_stage = 1;
|
| 1936 |
|
|
if (error) {
|
| 1937 |
|
|
set_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 1938 |
|
|
if (error == IDETAPE_ERROR_EOD)
|
| 1939 |
|
|
idetape_abort_pipeline(drive, active_stage);
|
| 1940 |
|
|
if (tape->onstream && !tape->raw &&
|
| 1941 |
|
|
error == IDETAPE_ERROR_GENERAL &&
|
| 1942 |
|
|
tape->sense.sense_key == 3) {
|
| 1943 |
|
|
clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 1944 |
|
|
printk(KERN_ERR "ide-tape: %s: write error, enabling error recovery\n", tape->name);
|
| 1945 |
|
|
tape->onstream_write_error = OS_WRITE_ERROR;
|
| 1946 |
|
|
remove_stage = 0;
|
| 1947 |
|
|
tape->nr_pending_stages++;
|
| 1948 |
|
|
tape->next_stage = tape->first_stage;
|
| 1949 |
|
|
rq->current_nr_sectors = rq->nr_sectors;
|
| 1950 |
|
|
if (tape->waiting) {
|
| 1951 |
|
|
rq->waiting = NULL;
|
| 1952 |
|
|
complete(tape->waiting);
|
| 1953 |
|
|
}
|
| 1954 |
|
|
}
|
| 1955 |
|
|
}
|
| 1956 |
|
|
} else if (rq->cmd == IDETAPE_READ_RQ) {
|
| 1957 |
|
|
if (error == IDETAPE_ERROR_EOD) {
|
| 1958 |
|
|
set_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 1959 |
|
|
idetape_abort_pipeline(drive, active_stage);
|
| 1960 |
|
|
}
|
| 1961 |
|
|
}
|
| 1962 |
|
|
if (tape->next_stage != NULL && !tape->onstream_write_error) {
|
| 1963 |
|
|
idetape_active_next_stage (drive);
|
| 1964 |
|
|
|
| 1965 |
|
|
/*
|
| 1966 |
|
|
* Insert the next request into the request queue.
|
| 1967 |
|
|
*/
|
| 1968 |
|
|
(void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
|
| 1969 |
|
|
} else if (!error) {
|
| 1970 |
|
|
if (!tape->onstream)
|
| 1971 |
|
|
idetape_increase_max_pipeline_stages(drive);
|
| 1972 |
|
|
}
|
| 1973 |
|
|
}
|
| 1974 |
|
|
ide_end_drive_cmd(drive, 0, 0);
|
| 1975 |
|
|
if (remove_stage)
|
| 1976 |
|
|
idetape_remove_stage_head(drive);
|
| 1977 |
|
|
if (tape->active_data_request == NULL)
|
| 1978 |
|
|
clear_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
|
| 1979 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 1980 |
|
|
return 0;
|
| 1981 |
|
|
}
|
| 1982 |
|
|
|
| 1983 |
|
|
static ide_startstop_t idetape_request_sense_callback (ide_drive_t *drive)
|
| 1984 |
|
|
{
|
| 1985 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 1986 |
|
|
|
| 1987 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 1988 |
|
|
if (tape->debug_level >= 4)
|
| 1989 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 1990 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 1991 |
|
|
if (!tape->pc->error) {
|
| 1992 |
|
|
idetape_analyze_error(drive, (idetape_request_sense_result_t *) tape->pc->buffer);
|
| 1993 |
|
|
idetape_end_request(drive, 1);
|
| 1994 |
|
|
} else {
|
| 1995 |
|
|
printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
|
| 1996 |
|
|
"itself - Aborting request!\n");
|
| 1997 |
|
|
idetape_end_request(drive, 0);
|
| 1998 |
|
|
}
|
| 1999 |
|
|
return ide_stopped;
|
| 2000 |
|
|
}
|
| 2001 |
|
|
|
| 2002 |
|
|
static void idetape_create_request_sense_cmd (idetape_pc_t *pc)
|
| 2003 |
|
|
{
|
| 2004 |
|
|
idetape_init_pc(pc);
|
| 2005 |
|
|
pc->c[0] = IDETAPE_REQUEST_SENSE_CMD;
|
| 2006 |
|
|
pc->c[4] = 20;
|
| 2007 |
|
|
pc->request_transfer = 20;
|
| 2008 |
|
|
pc->callback = &idetape_request_sense_callback;
|
| 2009 |
|
|
}
|
| 2010 |
|
|
|
| 2011 |
|
|
/*
|
| 2012 |
|
|
* idetape_queue_pc_head generates a new packet command request in front
|
| 2013 |
|
|
* of the request queue, before the current request, so that it will be
|
| 2014 |
|
|
* processed immediately, on the next pass through the driver.
|
| 2015 |
|
|
*
|
| 2016 |
|
|
* idetape_queue_pc_head is called from the request handling part of
|
| 2017 |
|
|
* the driver (the "bottom" part). Safe storage for the request should
|
| 2018 |
|
|
* be allocated with idetape_next_pc_storage and idetape_next_rq_storage
|
| 2019 |
|
|
* before calling idetape_queue_pc_head.
|
| 2020 |
|
|
*
|
| 2021 |
|
|
* Memory for those requests is pre-allocated at initialization time, and
|
| 2022 |
|
|
* is limited to IDETAPE_PC_STACK requests. We assume that we have enough
|
| 2023 |
|
|
* space for the maximum possible number of inter-dependent packet commands.
|
| 2024 |
|
|
*
|
| 2025 |
|
|
* The higher level of the driver - The ioctl handler and the character
|
| 2026 |
|
|
* device handling functions should queue request to the lower level part
|
| 2027 |
|
|
* and wait for their completion using idetape_queue_pc_tail or
|
| 2028 |
|
|
* idetape_queue_rw_tail.
|
| 2029 |
|
|
*/
|
| 2030 |
|
|
static void idetape_queue_pc_head (ide_drive_t *drive,idetape_pc_t *pc,struct request *rq)
|
| 2031 |
|
|
{
|
| 2032 |
|
|
ide_init_drive_cmd(rq);
|
| 2033 |
|
|
rq->buffer = (char *) pc;
|
| 2034 |
|
|
rq->cmd = IDETAPE_PC_RQ1;
|
| 2035 |
|
|
(void) ide_do_drive_cmd(drive, rq, ide_preempt);
|
| 2036 |
|
|
}
|
| 2037 |
|
|
|
| 2038 |
|
|
/*
|
| 2039 |
|
|
* idetape_retry_pc is called when an error was detected during the
|
| 2040 |
|
|
* last packet command. We queue a request sense packet command in
|
| 2041 |
|
|
* the head of the request list.
|
| 2042 |
|
|
*/
|
| 2043 |
|
|
static ide_startstop_t idetape_retry_pc (ide_drive_t *drive)
|
| 2044 |
|
|
{
|
| 2045 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2046 |
|
|
idetape_pc_t *pc;
|
| 2047 |
|
|
struct request *rq;
|
| 2048 |
|
|
atapi_error_t error;
|
| 2049 |
|
|
|
| 2050 |
|
|
error.all = HWIF(drive)->INB(IDE_ERROR_REG);
|
| 2051 |
|
|
pc = idetape_next_pc_storage (drive);
|
| 2052 |
|
|
rq = idetape_next_rq_storage (drive);
|
| 2053 |
|
|
idetape_create_request_sense_cmd(pc);
|
| 2054 |
|
|
set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
|
| 2055 |
|
|
idetape_queue_pc_head(drive, pc, rq);
|
| 2056 |
|
|
return ide_stopped;
|
| 2057 |
|
|
}
|
| 2058 |
|
|
|
| 2059 |
|
|
/*
|
| 2060 |
|
|
* idetape_postpone_request postpones the current request so that
|
| 2061 |
|
|
* ide.c will be able to service requests from another device on
|
| 2062 |
|
|
* the same hwgroup while we are polling for DSC.
|
| 2063 |
|
|
*/
|
| 2064 |
|
|
static void idetape_postpone_request (ide_drive_t *drive)
|
| 2065 |
|
|
{
|
| 2066 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2067 |
|
|
|
| 2068 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2069 |
|
|
if (tape->debug_level >= 4)
|
| 2070 |
|
|
printk(KERN_INFO "ide-tape: idetape_postpone_request\n");
|
| 2071 |
|
|
#endif
|
| 2072 |
|
|
tape->postponed_rq = HWGROUP(drive)->rq;
|
| 2073 |
|
|
ide_stall_queue(drive, tape->dsc_polling_frequency);
|
| 2074 |
|
|
}
|
| 2075 |
|
|
|
| 2076 |
|
|
/*
|
| 2077 |
|
|
* idetape_pc_intr is the usual interrupt handler which will be called
|
| 2078 |
|
|
* during a packet command. We will transfer some of the data (as
|
| 2079 |
|
|
* requested by the drive) and will re-point interrupt handler to us.
|
| 2080 |
|
|
* When data transfer is finished, we will act according to the
|
| 2081 |
|
|
* algorithm described before idetape_issue_packet_command.
|
| 2082 |
|
|
*
|
| 2083 |
|
|
*/
|
| 2084 |
|
|
static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
|
| 2085 |
|
|
{
|
| 2086 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2087 |
|
|
atapi_status_t status;
|
| 2088 |
|
|
atapi_bcount_t bcount;
|
| 2089 |
|
|
atapi_ireason_t ireason;
|
| 2090 |
|
|
idetape_pc_t *pc = tape->pc;
|
| 2091 |
|
|
|
| 2092 |
|
|
unsigned int temp;
|
| 2093 |
|
|
unsigned long cmd_time;
|
| 2094 |
|
|
#if SIMULATE_ERRORS
|
| 2095 |
|
|
static int error_sim_count = 0;
|
| 2096 |
|
|
#endif
|
| 2097 |
|
|
|
| 2098 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2099 |
|
|
if (tape->debug_level >= 4)
|
| 2100 |
|
|
printk(KERN_INFO "ide-tape: Reached idetape_pc_intr "
|
| 2101 |
|
|
"interrupt handler\n");
|
| 2102 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2103 |
|
|
|
| 2104 |
|
|
/* Clear the interrupt */
|
| 2105 |
|
|
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
|
| 2106 |
|
|
|
| 2107 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 2108 |
|
|
if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
|
| 2109 |
|
|
if (HWIF(drive)->ide_dma_end(drive) || status.b.check) {
|
| 2110 |
|
|
/*
|
| 2111 |
|
|
* A DMA error is sometimes expected. For example,
|
| 2112 |
|
|
* if the tape is crossing a filemark during a
|
| 2113 |
|
|
* READ command, it will issue an irq and position
|
| 2114 |
|
|
* itself before the filemark, so that only a partial
|
| 2115 |
|
|
* data transfer will occur (which causes the DMA
|
| 2116 |
|
|
* error). In that case, we will later ask the tape
|
| 2117 |
|
|
* how much bytes of the original request were
|
| 2118 |
|
|
* actually transferred (we can't receive that
|
| 2119 |
|
|
* information from the DMA engine on most chipsets).
|
| 2120 |
|
|
*/
|
| 2121 |
|
|
|
| 2122 |
|
|
/*
|
| 2123 |
|
|
* On the contrary, a DMA error is never expected;
|
| 2124 |
|
|
* it usually indicates a hardware error or abort.
|
| 2125 |
|
|
* If the tape crosses a filemark during a READ
|
| 2126 |
|
|
* command, it will issue an irq and position itself
|
| 2127 |
|
|
* after the filemark (not before). Only a partial
|
| 2128 |
|
|
* data transfer will occur, but no DMA error.
|
| 2129 |
|
|
* (AS, 19 Apr 2001)
|
| 2130 |
|
|
*/
|
| 2131 |
|
|
set_bit (PC_DMA_ERROR, &pc->flags);
|
| 2132 |
|
|
} else {
|
| 2133 |
|
|
pc->actually_transferred = pc->request_transfer;
|
| 2134 |
|
|
idetape_update_buffers (pc);
|
| 2135 |
|
|
}
|
| 2136 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2137 |
|
|
if (tape->debug_level >= 4)
|
| 2138 |
|
|
printk (KERN_INFO "ide-tape: DMA finished\n");
|
| 2139 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2140 |
|
|
}
|
| 2141 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 2142 |
|
|
|
| 2143 |
|
|
if (!status.b.drq) { /* No more interrupts */
|
| 2144 |
|
|
cmd_time = (jiffies - tape->cmd_start_time) * 1000 / HZ;
|
| 2145 |
|
|
tape->max_cmd_time = IDE_MAX(cmd_time, tape->max_cmd_time);
|
| 2146 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2147 |
|
|
if (tape->debug_level >= 2)
|
| 2148 |
|
|
printk(KERN_INFO "ide-tape: Packet command completed, "
|
| 2149 |
|
|
"%d bytes transferred\n",
|
| 2150 |
|
|
pc->actually_transferred);
|
| 2151 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2152 |
|
|
clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
|
| 2153 |
|
|
|
| 2154 |
|
|
local_irq_enable();
|
| 2155 |
|
|
|
| 2156 |
|
|
#if SIMULATE_ERRORS
|
| 2157 |
|
|
if ((pc->c[0] == IDETAPE_WRITE_CMD ||
|
| 2158 |
|
|
pc->c[0] == IDETAPE_READ_CMD) &&
|
| 2159 |
|
|
(++error_sim_count % 100) == 0) {
|
| 2160 |
|
|
printk(KERN_INFO "ide-tape: %s: simulating error\n",
|
| 2161 |
|
|
tape->name);
|
| 2162 |
|
|
status.b.check = 1;
|
| 2163 |
|
|
}
|
| 2164 |
|
|
#endif
|
| 2165 |
|
|
if (status.b.check && pc->c[0] == IDETAPE_REQUEST_SENSE_CMD)
|
| 2166 |
|
|
status.b.check = 0;
|
| 2167 |
|
|
if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
|
| 2168 |
|
|
/* Error detected */
|
| 2169 |
|
|
if (pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
|
| 2170 |
|
|
printk(KERN_ERR "ide-tape: I/O error in "
|
| 2171 |
|
|
"request sense command\n");
|
| 2172 |
|
|
return ide_do_reset(drive);
|
| 2173 |
|
|
}
|
| 2174 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2175 |
|
|
if (tape->debug_level >= 1)
|
| 2176 |
|
|
printk(KERN_INFO "ide-tape: [cmd %x]: check "
|
| 2177 |
|
|
"condition\n", pc->c[0]);
|
| 2178 |
|
|
#endif
|
| 2179 |
|
|
/* Retry operation */
|
| 2180 |
|
|
return idetape_retry_pc(drive);
|
| 2181 |
|
|
}
|
| 2182 |
|
|
pc->error = 0;
|
| 2183 |
|
|
if (!tape->onstream &&
|
| 2184 |
|
|
test_bit(PC_WAIT_FOR_DSC, &pc->flags) &&
|
| 2185 |
|
|
!status.b.dsc) {
|
| 2186 |
|
|
/* Media access command */
|
| 2187 |
|
|
tape->dsc_polling_start = jiffies;
|
| 2188 |
|
|
tape->dsc_polling_frequency = IDETAPE_DSC_MA_FAST;
|
| 2189 |
|
|
tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
|
| 2190 |
|
|
/* Allow ide.c to handle other requests */
|
| 2191 |
|
|
idetape_postpone_request(drive);
|
| 2192 |
|
|
return ide_stopped;
|
| 2193 |
|
|
}
|
| 2194 |
|
|
if (tape->failed_pc == pc)
|
| 2195 |
|
|
tape->failed_pc = NULL;
|
| 2196 |
|
|
/* Command finished - Call the callback function */
|
| 2197 |
|
|
return pc->callback(drive);
|
| 2198 |
|
|
}
|
| 2199 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 2200 |
|
|
if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
|
| 2201 |
|
|
printk(KERN_ERR "ide-tape: The tape wants to issue more "
|
| 2202 |
|
|
"interrupts in DMA mode\n");
|
| 2203 |
|
|
printk(KERN_ERR "ide-tape: DMA disabled, reverting to PIO\n");
|
| 2204 |
|
|
(void) HWIF(drive)->ide_dma_off(drive);
|
| 2205 |
|
|
return ide_do_reset(drive);
|
| 2206 |
|
|
}
|
| 2207 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 2208 |
|
|
/* Get the number of bytes to transfer */
|
| 2209 |
|
|
bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
|
| 2210 |
|
|
bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
|
| 2211 |
|
|
/* on this interrupt */
|
| 2212 |
|
|
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
|
| 2213 |
|
|
|
| 2214 |
|
|
if (ireason.b.cod) {
|
| 2215 |
|
|
printk(KERN_ERR "ide-tape: CoD != 0 in idetape_pc_intr\n");
|
| 2216 |
|
|
return ide_do_reset(drive);
|
| 2217 |
|
|
}
|
| 2218 |
|
|
if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
|
| 2219 |
|
|
/* Hopefully, we will never get here */
|
| 2220 |
|
|
printk(KERN_ERR "ide-tape: We wanted to %s, ",
|
| 2221 |
|
|
ireason.b.io ? "Write":"Read");
|
| 2222 |
|
|
printk(KERN_ERR "ide-tape: but the tape wants us to %s !\n",
|
| 2223 |
|
|
ireason.b.io ? "Read":"Write");
|
| 2224 |
|
|
return ide_do_reset(drive);
|
| 2225 |
|
|
}
|
| 2226 |
|
|
if (!test_bit(PC_WRITING, &pc->flags)) {
|
| 2227 |
|
|
/* Reading - Check that we have enough space */
|
| 2228 |
|
|
temp = pc->actually_transferred + bcount.all;
|
| 2229 |
|
|
if (temp > pc->request_transfer) {
|
| 2230 |
|
|
if (temp > pc->buffer_size) {
|
| 2231 |
|
|
printk(KERN_ERR "ide-tape: The tape wants to "
|
| 2232 |
|
|
"send us more data than expected "
|
| 2233 |
|
|
"- discarding data\n");
|
| 2234 |
|
|
idetape_discard_data(drive, bcount.all);
|
| 2235 |
|
|
if (HWGROUP(drive)->handler != NULL)
|
| 2236 |
|
|
BUG();
|
| 2237 |
|
|
ide_set_handler(drive,
|
| 2238 |
|
|
&idetape_pc_intr,
|
| 2239 |
|
|
IDETAPE_WAIT_CMD,
|
| 2240 |
|
|
NULL);
|
| 2241 |
|
|
return ide_started;
|
| 2242 |
|
|
}
|
| 2243 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2244 |
|
|
if (tape->debug_level >= 2)
|
| 2245 |
|
|
printk(KERN_NOTICE "ide-tape: The tape wants "
|
| 2246 |
|
|
"to send us more data than expected "
|
| 2247 |
|
|
"- allowing transfer\n");
|
| 2248 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2249 |
|
|
}
|
| 2250 |
|
|
}
|
| 2251 |
|
|
if (test_bit(PC_WRITING, &pc->flags)) {
|
| 2252 |
|
|
if (pc->bh != NULL)
|
| 2253 |
|
|
idetape_output_buffers(drive, pc, bcount.all);
|
| 2254 |
|
|
else
|
| 2255 |
|
|
/* Write the current buffer */
|
| 2256 |
|
|
HWIF(drive)->atapi_output_bytes(drive,pc->current_position,bcount.all);
|
| 2257 |
|
|
} else {
|
| 2258 |
|
|
if (pc->bh != NULL)
|
| 2259 |
|
|
idetape_input_buffers(drive, pc, bcount.all);
|
| 2260 |
|
|
else
|
| 2261 |
|
|
/* Read the current buffer */
|
| 2262 |
|
|
HWIF(drive)->atapi_input_bytes(drive,pc->current_position,bcount.all);
|
| 2263 |
|
|
}
|
| 2264 |
|
|
/* Update the current position */
|
| 2265 |
|
|
pc->actually_transferred += bcount.all;
|
| 2266 |
|
|
pc->current_position += bcount.all;
|
| 2267 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2268 |
|
|
if (tape->debug_level >= 2)
|
| 2269 |
|
|
printk(KERN_INFO "ide-tape: [cmd %x] done %d\n"
|
| 2270 |
|
|
pc->c[0], bcount.all);
|
| 2271 |
|
|
#endif
|
| 2272 |
|
|
if (HWGROUP(drive)->handler != NULL)
|
| 2273 |
|
|
BUG();
|
| 2274 |
|
|
/* And set the interrupt handler again */
|
| 2275 |
|
|
ide_set_handler (drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
|
| 2276 |
|
|
return ide_started;
|
| 2277 |
|
|
}
|
| 2278 |
|
|
|
| 2279 |
|
|
/*
|
| 2280 |
|
|
* Packet Command Interface
|
| 2281 |
|
|
*
|
| 2282 |
|
|
* The current Packet Command is available in tape->pc, and will not
|
| 2283 |
|
|
* change until we finish handling it. Each packet command is associated
|
| 2284 |
|
|
* with a callback function that will be called when the command is
|
| 2285 |
|
|
* finished.
|
| 2286 |
|
|
*
|
| 2287 |
|
|
* The handling will be done in three stages:
|
| 2288 |
|
|
*
|
| 2289 |
|
|
* 1. idetape_issue_packet_command will send the packet command to the
|
| 2290 |
|
|
* drive, and will set the interrupt handler to idetape_pc_intr.
|
| 2291 |
|
|
*
|
| 2292 |
|
|
* 2. On each interrupt, idetape_pc_intr will be called. This step
|
| 2293 |
|
|
* will be repeated until the device signals us that no more
|
| 2294 |
|
|
* interrupts will be issued.
|
| 2295 |
|
|
*
|
| 2296 |
|
|
* 3. ATAPI Tape media access commands have immediate status with a
|
| 2297 |
|
|
* delayed process. In case of a successful initiation of a
|
| 2298 |
|
|
* media access packet command, the DSC bit will be set when the
|
| 2299 |
|
|
* actual execution of the command is finished.
|
| 2300 |
|
|
* Since the tape drive will not issue an interrupt, we have to
|
| 2301 |
|
|
* poll for this event. In this case, we define the request as
|
| 2302 |
|
|
* "low priority request" by setting rq_status to
|
| 2303 |
|
|
* IDETAPE_RQ_POSTPONED, set a timer to poll for DSC and exit
|
| 2304 |
|
|
* the driver.
|
| 2305 |
|
|
*
|
| 2306 |
|
|
* ide.c will then give higher priority to requests which
|
| 2307 |
|
|
* originate from the other device, until will change rq_status
|
| 2308 |
|
|
* to RQ_ACTIVE.
|
| 2309 |
|
|
*
|
| 2310 |
|
|
* 4. When the packet command is finished, it will be checked for errors.
|
| 2311 |
|
|
*
|
| 2312 |
|
|
* 5. In case an error was found, we queue a request sense packet
|
| 2313 |
|
|
* command in front of the request queue and retry the operation
|
| 2314 |
|
|
* upto IDETAPE_MAX_PC_RETRIES times.
|
| 2315 |
|
|
*
|
| 2316 |
|
|
* 6. In case no error was found, or we decided to give up and not
|
| 2317 |
|
|
* to retry again, the callback function will be called and then
|
| 2318 |
|
|
* we will handle the next request.
|
| 2319 |
|
|
*
|
| 2320 |
|
|
*/
|
| 2321 |
|
|
static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
|
| 2322 |
|
|
{
|
| 2323 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2324 |
|
|
idetape_pc_t *pc = tape->pc;
|
| 2325 |
|
|
atapi_ireason_t ireason;
|
| 2326 |
|
|
int retries = 100;
|
| 2327 |
|
|
ide_startstop_t startstop;
|
| 2328 |
|
|
|
| 2329 |
|
|
if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
|
| 2330 |
|
|
printk(KERN_ERR "ide-tape: Strange, packet command "
|
| 2331 |
|
|
"initiated yet DRQ isn't asserted\n");
|
| 2332 |
|
|
return startstop;
|
| 2333 |
|
|
}
|
| 2334 |
|
|
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
|
| 2335 |
|
|
while (retries-- && (!ireason.b.cod || ireason.b.io)) {
|
| 2336 |
|
|
printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while issuing "
|
| 2337 |
|
|
"a packet command, retrying\n");
|
| 2338 |
|
|
udelay(100);
|
| 2339 |
|
|
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
|
| 2340 |
|
|
if (retries == 0) {
|
| 2341 |
|
|
printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while "
|
| 2342 |
|
|
"issuing a packet command, ignoring\n");
|
| 2343 |
|
|
ireason.b.cod = 1;
|
| 2344 |
|
|
ireason.b.io = 0;
|
| 2345 |
|
|
}
|
| 2346 |
|
|
}
|
| 2347 |
|
|
if (!ireason.b.cod || ireason.b.io) {
|
| 2348 |
|
|
printk(KERN_ERR "ide-tape: (IO,CoD) != (0,1) while issuing "
|
| 2349 |
|
|
"a packet command\n");
|
| 2350 |
|
|
return ide_do_reset(drive);
|
| 2351 |
|
|
}
|
| 2352 |
|
|
tape->cmd_start_time = jiffies;
|
| 2353 |
|
|
if (HWGROUP(drive)->handler != NULL) /* paranoia check */
|
| 2354 |
|
|
BUG();
|
| 2355 |
|
|
/* Set the interrupt routine */
|
| 2356 |
|
|
ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
|
| 2357 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 2358 |
|
|
/* Begin DMA, if necessary */
|
| 2359 |
|
|
if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags))
|
| 2360 |
|
|
(void) (HWIF(drive)->ide_dma_begin(drive));
|
| 2361 |
|
|
#endif
|
| 2362 |
|
|
/* Send the actual packet */
|
| 2363 |
|
|
HWIF(drive)->atapi_output_bytes(drive, pc->c, 12);
|
| 2364 |
|
|
return ide_started;
|
| 2365 |
|
|
}
|
| 2366 |
|
|
|
| 2367 |
|
|
static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape_pc_t *pc)
|
| 2368 |
|
|
{
|
| 2369 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2370 |
|
|
atapi_feature_t feature;
|
| 2371 |
|
|
atapi_bcount_t bcount;
|
| 2372 |
|
|
|
| 2373 |
|
|
feature.all = 0;
|
| 2374 |
|
|
|
| 2375 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 2376 |
|
|
if (tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD &&
|
| 2377 |
|
|
pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
|
| 2378 |
|
|
printk(KERN_ERR "ide-tape: possible ide-tape.c bug - "
|
| 2379 |
|
|
"Two request sense in serial were issued\n");
|
| 2380 |
|
|
}
|
| 2381 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 2382 |
|
|
|
| 2383 |
|
|
if (tape->failed_pc == NULL && pc->c[0] != IDETAPE_REQUEST_SENSE_CMD)
|
| 2384 |
|
|
tape->failed_pc = pc;
|
| 2385 |
|
|
/* Set the current packet command */
|
| 2386 |
|
|
tape->pc = pc;
|
| 2387 |
|
|
|
| 2388 |
|
|
if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
|
| 2389 |
|
|
test_bit(PC_ABORT, &pc->flags)) {
|
| 2390 |
|
|
/*
|
| 2391 |
|
|
* We will "abort" retrying a packet command in case
|
| 2392 |
|
|
* a legitimate error code was received (crossing a
|
| 2393 |
|
|
* filemark, or end of the media, for example).
|
| 2394 |
|
|
*/
|
| 2395 |
|
|
if (!test_bit (PC_ABORT, &pc->flags)) {
|
| 2396 |
|
|
if (!(pc->c[0] == IDETAPE_TEST_UNIT_READY_CMD &&
|
| 2397 |
|
|
tape->sense_key == 2 && tape->asc == 4 &&
|
| 2398 |
|
|
(tape->ascq == 1 || tape->ascq == 8))) {
|
| 2399 |
|
|
printk(KERN_ERR "ide-tape: %s: I/O error, "
|
| 2400 |
|
|
"pc = %2x, key = %2x, "
|
| 2401 |
|
|
"asc = %2x, ascq = %2x\n",
|
| 2402 |
|
|
tape->name, pc->c[0],
|
| 2403 |
|
|
tape->sense_key, tape->asc,
|
| 2404 |
|
|
tape->ascq);
|
| 2405 |
|
|
if (tape->onstream &&
|
| 2406 |
|
|
pc->c[0] == IDETAPE_READ_CMD &&
|
| 2407 |
|
|
tape->sense_key == 3 &&
|
| 2408 |
|
|
tape->asc == 0x11)
|
| 2409 |
|
|
/* AJN-1: 11 should be 0x11 */
|
| 2410 |
|
|
printk(KERN_ERR "ide-tape: %s: enabling read error recovery\n", tape->name);
|
| 2411 |
|
|
}
|
| 2412 |
|
|
/* Giving up */
|
| 2413 |
|
|
pc->error = IDETAPE_ERROR_GENERAL;
|
| 2414 |
|
|
}
|
| 2415 |
|
|
tape->failed_pc = NULL;
|
| 2416 |
|
|
return pc->callback(drive);
|
| 2417 |
|
|
}
|
| 2418 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2419 |
|
|
if (tape->debug_level >= 2)
|
| 2420 |
|
|
printk(KERN_INFO "ide-tape: Retry number - %d, cmd = %02X\n",
|
| 2421 |
|
|
pc->retries, pc->c[0]);
|
| 2422 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2423 |
|
|
|
| 2424 |
|
|
pc->retries++;
|
| 2425 |
|
|
/* We haven't transferred any data yet */
|
| 2426 |
|
|
pc->actually_transferred = 0;
|
| 2427 |
|
|
pc->current_position = pc->buffer;
|
| 2428 |
|
|
/* Request to transfer the entire buffer at once */
|
| 2429 |
|
|
bcount.all = pc->request_transfer;
|
| 2430 |
|
|
|
| 2431 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 2432 |
|
|
if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
|
| 2433 |
|
|
printk(KERN_WARNING "ide-tape: DMA disabled, "
|
| 2434 |
|
|
"reverting to PIO\n");
|
| 2435 |
|
|
(void) HWIF(drive)->ide_dma_off(drive);
|
| 2436 |
|
|
}
|
| 2437 |
|
|
if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) {
|
| 2438 |
|
|
if (test_bit(PC_WRITING, &pc->flags)) {
|
| 2439 |
|
|
feature.b.dma = !HWIF(drive)->ide_dma_write(drive);
|
| 2440 |
|
|
} else {
|
| 2441 |
|
|
feature.b.dma = !HWIF(drive)->ide_dma_read(drive);
|
| 2442 |
|
|
}
|
| 2443 |
|
|
}
|
| 2444 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 2445 |
|
|
|
| 2446 |
|
|
if (IDE_CONTROL_REG)
|
| 2447 |
|
|
HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
|
| 2448 |
|
|
/* Use PIO/DMA */
|
| 2449 |
|
|
HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
|
| 2450 |
|
|
HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
|
| 2451 |
|
|
HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
|
| 2452 |
|
|
HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
|
| 2453 |
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
| 2454 |
|
|
if (feature.b.dma) /* Will begin DMA later */
|
| 2455 |
|
|
set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
|
| 2456 |
|
|
#endif /* CONFIG_BLK_DEV_IDEDMA */
|
| 2457 |
|
|
if (test_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags)) {
|
| 2458 |
|
|
ide_execute_command(drive, WIN_PACKETCMD,
|
| 2459 |
|
|
&idetape_transfer_pc,
|
| 2460 |
|
|
IDETAPE_WAIT_CMD,
|
| 2461 |
|
|
NULL);
|
| 2462 |
|
|
return ide_started;
|
| 2463 |
|
|
} else {
|
| 2464 |
|
|
HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
|
| 2465 |
|
|
return idetape_transfer_pc(drive);
|
| 2466 |
|
|
}
|
| 2467 |
|
|
}
|
| 2468 |
|
|
|
| 2469 |
|
|
/*
|
| 2470 |
|
|
* General packet command callback function.
|
| 2471 |
|
|
*/
|
| 2472 |
|
|
static ide_startstop_t idetape_pc_callback (ide_drive_t *drive)
|
| 2473 |
|
|
{
|
| 2474 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2475 |
|
|
|
| 2476 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2477 |
|
|
if (tape->debug_level >= 4)
|
| 2478 |
|
|
printk (KERN_INFO "ide-tape: Reached idetape_pc_callback\n");
|
| 2479 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2480 |
|
|
|
| 2481 |
|
|
idetape_end_request(drive, tape->pc->error ? 0 : 1);
|
| 2482 |
|
|
return ide_stopped;
|
| 2483 |
|
|
}
|
| 2484 |
|
|
|
| 2485 |
|
|
/*
|
| 2486 |
|
|
* A mode sense command is used to "sense" tape parameters.
|
| 2487 |
|
|
*/
|
| 2488 |
|
|
static void idetape_create_mode_sense_cmd (idetape_pc_t *pc, u8 page_code)
|
| 2489 |
|
|
{
|
| 2490 |
|
|
idetape_init_pc (pc);
|
| 2491 |
|
|
pc->c[0] = IDETAPE_MODE_SENSE_CMD;
|
| 2492 |
|
|
if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
|
| 2493 |
|
|
pc->c[1] = 8; /* DBD = 1 - Don't return block descriptors */
|
| 2494 |
|
|
pc->c[2] = page_code;
|
| 2495 |
|
|
pc->c[3] = 255; /* Don't limit the returned information */
|
| 2496 |
|
|
pc->c[4] = 255; /* (We will just discard data in that case) */
|
| 2497 |
|
|
if (page_code == IDETAPE_BLOCK_DESCRIPTOR)
|
| 2498 |
|
|
pc->request_transfer = 12;
|
| 2499 |
|
|
else if (page_code == IDETAPE_CAPABILITIES_PAGE)
|
| 2500 |
|
|
pc->request_transfer = 24;
|
| 2501 |
|
|
else
|
| 2502 |
|
|
pc->request_transfer = 50;
|
| 2503 |
|
|
pc->callback = &idetape_pc_callback;
|
| 2504 |
|
|
}
|
| 2505 |
|
|
|
| 2506 |
|
|
static ide_startstop_t idetape_onstream_buffer_fill_callback (ide_drive_t *drive)
|
| 2507 |
|
|
{
|
| 2508 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2509 |
|
|
|
| 2510 |
|
|
tape->max_frames = tape->pc->buffer[4 + 2];
|
| 2511 |
|
|
tape->cur_frames = tape->pc->buffer[4 + 3];
|
| 2512 |
|
|
if (tape->chrdev_direction == idetape_direction_write)
|
| 2513 |
|
|
tape->tape_head = tape->buffer_head - tape->cur_frames;
|
| 2514 |
|
|
else
|
| 2515 |
|
|
tape->tape_head = tape->buffer_head + tape->cur_frames;
|
| 2516 |
|
|
if (tape->tape_head != tape->last_tape_head) {
|
| 2517 |
|
|
tape->last_tape_head = tape->tape_head;
|
| 2518 |
|
|
tape->tape_still_time_begin = jiffies;
|
| 2519 |
|
|
if (tape->tape_still_time > 200)
|
| 2520 |
|
|
tape->measure_insert_time = 1;
|
| 2521 |
|
|
}
|
| 2522 |
|
|
tape->tape_still_time = (jiffies - tape->tape_still_time_begin) * 1000 / HZ;
|
| 2523 |
|
|
#if USE_IOTRACE
|
| 2524 |
|
|
IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head,
|
| 2525 |
|
|
tape->tape_head, tape->minor);
|
| 2526 |
|
|
#endif
|
| 2527 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2528 |
|
|
if (tape->debug_level >= 1)
|
| 2529 |
|
|
printk(KERN_INFO "ide-tape: buffer fill callback, %d/%d\n",
|
| 2530 |
|
|
tape->cur_frames, tape->max_frames);
|
| 2531 |
|
|
#endif
|
| 2532 |
|
|
idetape_end_request(drive, tape->pc->error ? 0 : 1);
|
| 2533 |
|
|
return ide_stopped;
|
| 2534 |
|
|
}
|
| 2535 |
|
|
|
| 2536 |
|
|
static void idetape_queue_onstream_buffer_fill (ide_drive_t *drive)
|
| 2537 |
|
|
{
|
| 2538 |
|
|
idetape_pc_t *pc;
|
| 2539 |
|
|
struct request *rq;
|
| 2540 |
|
|
|
| 2541 |
|
|
pc = idetape_next_pc_storage (drive);
|
| 2542 |
|
|
rq = idetape_next_rq_storage (drive);
|
| 2543 |
|
|
idetape_create_mode_sense_cmd (pc, IDETAPE_BUFFER_FILLING_PAGE);
|
| 2544 |
|
|
pc->callback = idetape_onstream_buffer_fill_callback;
|
| 2545 |
|
|
idetape_queue_pc_head (drive, pc, rq);
|
| 2546 |
|
|
}
|
| 2547 |
|
|
|
| 2548 |
|
|
static void calculate_speeds(ide_drive_t *drive)
|
| 2549 |
|
|
{
|
| 2550 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2551 |
|
|
int full = 125, empty = 75;
|
| 2552 |
|
|
|
| 2553 |
|
|
if (time_after(jiffies, tape->controlled_pipeline_head_time + 120 * HZ)) {
|
| 2554 |
|
|
tape->controlled_previous_pipeline_head = tape->controlled_last_pipeline_head;
|
| 2555 |
|
|
tape->controlled_previous_head_time = tape->controlled_pipeline_head_time;
|
| 2556 |
|
|
tape->controlled_last_pipeline_head = tape->pipeline_head;
|
| 2557 |
|
|
tape->controlled_pipeline_head_time = jiffies;
|
| 2558 |
|
|
}
|
| 2559 |
|
|
if (time_after(jiffies, tape->controlled_pipeline_head_time + 60 * HZ))
|
| 2560 |
|
|
tape->controlled_pipeline_head_speed = (tape->pipeline_head - tape->controlled_last_pipeline_head) * 32 * HZ / (jiffies - tape->controlled_pipeline_head_time);
|
| 2561 |
|
|
else if (time_after(jiffies, tape->controlled_previous_head_time))
|
| 2562 |
|
|
tape->controlled_pipeline_head_speed = (tape->pipeline_head - tape->controlled_previous_pipeline_head) * 32 * HZ / (jiffies - tape->controlled_previous_head_time);
|
| 2563 |
|
|
|
| 2564 |
|
|
if (tape->nr_pending_stages < tape->max_stages /*- 1 */) {
|
| 2565 |
|
|
/* -1 for read mode error recovery */
|
| 2566 |
|
|
if (time_after(jiffies, tape->uncontrolled_previous_head_time + 10 * HZ)) {
|
| 2567 |
|
|
tape->uncontrolled_pipeline_head_time = jiffies;
|
| 2568 |
|
|
tape->uncontrolled_pipeline_head_speed = (tape->pipeline_head - tape->uncontrolled_previous_pipeline_head) * 32 * HZ / (jiffies - tape->uncontrolled_previous_head_time);
|
| 2569 |
|
|
}
|
| 2570 |
|
|
} else {
|
| 2571 |
|
|
tape->uncontrolled_previous_head_time = jiffies;
|
| 2572 |
|
|
tape->uncontrolled_previous_pipeline_head = tape->pipeline_head;
|
| 2573 |
|
|
if (time_after(jiffies, tape->uncontrolled_pipeline_head_time + 30 * HZ)) {
|
| 2574 |
|
|
tape->uncontrolled_pipeline_head_time = jiffies;
|
| 2575 |
|
|
}
|
| 2576 |
|
|
}
|
| 2577 |
|
|
tape->pipeline_head_speed = IDE_MAX(tape->uncontrolled_pipeline_head_speed, tape->controlled_pipeline_head_speed);
|
| 2578 |
|
|
if (tape->speed_control == 0) {
|
| 2579 |
|
|
tape->max_insert_speed = 5000;
|
| 2580 |
|
|
} else if (tape->speed_control == 1) {
|
| 2581 |
|
|
if (tape->nr_pending_stages >= tape->max_stages / 2)
|
| 2582 |
|
|
tape->max_insert_speed = tape->pipeline_head_speed +
|
| 2583 |
|
|
(1100 - tape->pipeline_head_speed) * 2 * (tape->nr_pending_stages - tape->max_stages / 2) / tape->max_stages;
|
| 2584 |
|
|
else
|
| 2585 |
|
|
tape->max_insert_speed = 500 +
|
| 2586 |
|
|
(tape->pipeline_head_speed - 500) * 2 * tape->nr_pending_stages / tape->max_stages;
|
| 2587 |
|
|
if (tape->nr_pending_stages >= tape->max_stages * 99 / 100)
|
| 2588 |
|
|
tape->max_insert_speed = 5000;
|
| 2589 |
|
|
} else if (tape->speed_control == 2) {
|
| 2590 |
|
|
tape->max_insert_speed = tape->pipeline_head_speed * empty / 100 +
|
| 2591 |
|
|
(tape->pipeline_head_speed * full / 100 - tape->pipeline_head_speed * empty / 100) * tape->nr_pending_stages / tape->max_stages;
|
| 2592 |
|
|
} else
|
| 2593 |
|
|
tape->max_insert_speed = tape->speed_control;
|
| 2594 |
|
|
tape->max_insert_speed = IDE_MAX(tape->max_insert_speed, 500);
|
| 2595 |
|
|
}
|
| 2596 |
|
|
|
| 2597 |
|
|
static ide_startstop_t idetape_media_access_finished (ide_drive_t *drive)
|
| 2598 |
|
|
{
|
| 2599 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2600 |
|
|
idetape_pc_t *pc = tape->pc;
|
| 2601 |
|
|
atapi_status_t status;
|
| 2602 |
|
|
|
| 2603 |
|
|
if (tape->onstream)
|
| 2604 |
|
|
printk(KERN_INFO "ide-tape: bug: "
|
| 2605 |
|
|
"onstream, media_access_finished\n");
|
| 2606 |
|
|
|
| 2607 |
|
|
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
|
| 2608 |
|
|
|
| 2609 |
|
|
if (status.b.dsc) {
|
| 2610 |
|
|
if (status.b.check) {
|
| 2611 |
|
|
/* Error detected */
|
| 2612 |
|
|
printk(KERN_ERR "ide-tape: %s: I/O error: "
|
| 2613 |
|
|
"pc = %2x, key = %2x, asc = %2x, ascq = %2x\n",
|
| 2614 |
|
|
tape->name, pc->c[0],
|
| 2615 |
|
|
tape->sense_key, tape->asc, tape->ascq);
|
| 2616 |
|
|
|
| 2617 |
|
|
/* Retry operation */
|
| 2618 |
|
|
return idetape_retry_pc(drive);
|
| 2619 |
|
|
}
|
| 2620 |
|
|
pc->error = 0;
|
| 2621 |
|
|
if (tape->failed_pc == pc)
|
| 2622 |
|
|
tape->failed_pc = NULL;
|
| 2623 |
|
|
} else {
|
| 2624 |
|
|
pc->error = IDETAPE_ERROR_GENERAL;
|
| 2625 |
|
|
tape->failed_pc = NULL;
|
| 2626 |
|
|
}
|
| 2627 |
|
|
return pc->callback (drive);
|
| 2628 |
|
|
}
|
| 2629 |
|
|
|
| 2630 |
|
|
static ide_startstop_t idetape_rw_callback (ide_drive_t *drive)
|
| 2631 |
|
|
{
|
| 2632 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2633 |
|
|
struct request *rq = HWGROUP(drive)->rq;
|
| 2634 |
|
|
int blocks = tape->pc->actually_transferred / tape->tape_block_size;
|
| 2635 |
|
|
|
| 2636 |
|
|
tape->avg_size += blocks * tape->tape_block_size;
|
| 2637 |
|
|
tape->insert_size += blocks * tape->tape_block_size;
|
| 2638 |
|
|
if (tape->insert_size > 1024 * 1024)
|
| 2639 |
|
|
tape->measure_insert_time = 1;
|
| 2640 |
|
|
if (tape->measure_insert_time) {
|
| 2641 |
|
|
tape->measure_insert_time = 0;
|
| 2642 |
|
|
tape->insert_time = jiffies;
|
| 2643 |
|
|
tape->insert_size = 0;
|
| 2644 |
|
|
}
|
| 2645 |
|
|
if (time_after(jiffies, tape->insert_time))
|
| 2646 |
|
|
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
|
| 2647 |
|
|
if (jiffies - tape->avg_time >= HZ) {
|
| 2648 |
|
|
tape->avg_speed = tape->avg_size * HZ / (jiffies - tape->avg_time) / 1024;
|
| 2649 |
|
|
tape->avg_size = 0;
|
| 2650 |
|
|
tape->avg_time = jiffies;
|
| 2651 |
|
|
}
|
| 2652 |
|
|
|
| 2653 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2654 |
|
|
if (tape->debug_level >= 4)
|
| 2655 |
|
|
printk(KERN_INFO "ide-tape: Reached idetape_rw_callback\n");
|
| 2656 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2657 |
|
|
|
| 2658 |
|
|
tape->first_frame_position += blocks;
|
| 2659 |
|
|
rq->current_nr_sectors -= blocks;
|
| 2660 |
|
|
|
| 2661 |
|
|
if (!tape->pc->error)
|
| 2662 |
|
|
idetape_end_request(drive, 1);
|
| 2663 |
|
|
else
|
| 2664 |
|
|
idetape_end_request(drive, tape->pc->error);
|
| 2665 |
|
|
return ide_stopped;
|
| 2666 |
|
|
}
|
| 2667 |
|
|
|
| 2668 |
|
|
static void idetape_create_read_cmd (idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
|
| 2669 |
|
|
{
|
| 2670 |
|
|
struct buffer_head *p = bh;
|
| 2671 |
|
|
idetape_init_pc (pc);
|
| 2672 |
|
|
pc->c[0] = IDETAPE_READ_CMD;
|
| 2673 |
|
|
put_unaligned(htonl (length), (unsigned int *) &pc->c[1]);
|
| 2674 |
|
|
pc->c[1] = 1;
|
| 2675 |
|
|
pc->callback = &idetape_rw_callback;
|
| 2676 |
|
|
pc->bh = bh;
|
| 2677 |
|
|
atomic_set(&bh->b_count, 0);
|
| 2678 |
|
|
pc->buffer = NULL;
|
| 2679 |
|
|
if (tape->onstream) {
|
| 2680 |
|
|
while (p) {
|
| 2681 |
|
|
atomic_set(&p->b_count, 0);
|
| 2682 |
|
|
p = p->b_reqnext;
|
| 2683 |
|
|
}
|
| 2684 |
|
|
}
|
| 2685 |
|
|
if (!tape->onstream) {
|
| 2686 |
|
|
pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
|
| 2687 |
|
|
if (pc->request_transfer == tape->stage_size)
|
| 2688 |
|
|
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
|
| 2689 |
|
|
} else {
|
| 2690 |
|
|
if (length) {
|
| 2691 |
|
|
pc->request_transfer = pc->buffer_size = 32768 + 512;
|
| 2692 |
|
|
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
|
| 2693 |
|
|
} else
|
| 2694 |
|
|
pc->request_transfer = 0;
|
| 2695 |
|
|
}
|
| 2696 |
|
|
}
|
| 2697 |
|
|
|
| 2698 |
|
|
static void idetape_create_read_buffer_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
|
| 2699 |
|
|
{
|
| 2700 |
|
|
int size = 32768;
|
| 2701 |
|
|
|
| 2702 |
|
|
struct buffer_head *p = bh;
|
| 2703 |
|
|
idetape_init_pc(pc);
|
| 2704 |
|
|
pc->c[0] = IDETAPE_READ_BUFFER_CMD;
|
| 2705 |
|
|
pc->c[1] = IDETAPE_RETRIEVE_FAULTY_BLOCK;
|
| 2706 |
|
|
pc->c[7] = size >> 8;
|
| 2707 |
|
|
pc->c[8] = size & 0xff;
|
| 2708 |
|
|
pc->callback = &idetape_pc_callback;
|
| 2709 |
|
|
pc->bh = bh;
|
| 2710 |
|
|
atomic_set(&bh->b_count, 0);
|
| 2711 |
|
|
pc->buffer = NULL;
|
| 2712 |
|
|
while (p) {
|
| 2713 |
|
|
atomic_set(&p->b_count, 0);
|
| 2714 |
|
|
p = p->b_reqnext;
|
| 2715 |
|
|
}
|
| 2716 |
|
|
pc->request_transfer = pc->buffer_size = size;
|
| 2717 |
|
|
}
|
| 2718 |
|
|
|
| 2719 |
|
|
static void idetape_create_write_cmd (idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
|
| 2720 |
|
|
{
|
| 2721 |
|
|
struct buffer_head *p = bh;
|
| 2722 |
|
|
idetape_init_pc(pc);
|
| 2723 |
|
|
pc->c[0] = IDETAPE_WRITE_CMD;
|
| 2724 |
|
|
put_unaligned(htonl (length), (unsigned int *) &pc->c[1]);
|
| 2725 |
|
|
pc->c[1] = 1;
|
| 2726 |
|
|
pc->callback = &idetape_rw_callback;
|
| 2727 |
|
|
set_bit (PC_WRITING, &pc->flags);
|
| 2728 |
|
|
if (tape->onstream) {
|
| 2729 |
|
|
while (p) {
|
| 2730 |
|
|
atomic_set(&p->b_count, p->b_size);
|
| 2731 |
|
|
p = p->b_reqnext;
|
| 2732 |
|
|
}
|
| 2733 |
|
|
}
|
| 2734 |
|
|
pc->bh = bh;
|
| 2735 |
|
|
pc->b_data = bh->b_data;
|
| 2736 |
|
|
pc->b_count = atomic_read(&bh->b_count);
|
| 2737 |
|
|
pc->buffer = NULL;
|
| 2738 |
|
|
if (!tape->onstream) {
|
| 2739 |
|
|
pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
|
| 2740 |
|
|
if (pc->request_transfer == tape->stage_size)
|
| 2741 |
|
|
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
|
| 2742 |
|
|
} else {
|
| 2743 |
|
|
if (length) {
|
| 2744 |
|
|
pc->request_transfer = pc->buffer_size = 32768 + 512;
|
| 2745 |
|
|
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
|
| 2746 |
|
|
} else
|
| 2747 |
|
|
pc->request_transfer = 0;
|
| 2748 |
|
|
}
|
| 2749 |
|
|
}
|
| 2750 |
|
|
|
| 2751 |
|
|
/*
|
| 2752 |
|
|
* This is our end_request replacement function.
|
| 2753 |
|
|
*/
|
| 2754 |
|
|
static int idetape_do_end_request (ide_drive_t *drive, int uptodate)
|
| 2755 |
|
|
{
|
| 2756 |
|
|
struct request *rq;
|
| 2757 |
|
|
unsigned long flags;
|
| 2758 |
|
|
int ret = 1;
|
| 2759 |
|
|
|
| 2760 |
|
|
spin_lock_irqsave(&io_request_lock, flags);
|
| 2761 |
|
|
rq = HWGROUP(drive)->rq;
|
| 2762 |
|
|
|
| 2763 |
|
|
/*
|
| 2764 |
|
|
* decide whether to reenable DMA -- 3 is a random magic for now,
|
| 2765 |
|
|
* if we DMA timeout more than 3 times, just stay in PIO
|
| 2766 |
|
|
*/
|
| 2767 |
|
|
if (drive->state == DMA_PIO_RETRY && drive->retry_pio <= 3) {
|
| 2768 |
|
|
drive->state = 0;
|
| 2769 |
|
|
HWGROUP(drive)->hwif->ide_dma_on(drive);
|
| 2770 |
|
|
}
|
| 2771 |
|
|
|
| 2772 |
|
|
if (!end_that_request_first(rq, uptodate, drive->name)) {
|
| 2773 |
|
|
add_blkdev_randomness(MAJOR(rq->rq_dev));
|
| 2774 |
|
|
blkdev_dequeue_request(rq);
|
| 2775 |
|
|
HWGROUP(drive)->rq = NULL;
|
| 2776 |
|
|
end_that_request_last(rq);
|
| 2777 |
|
|
ret = 0;
|
| 2778 |
|
|
}
|
| 2779 |
|
|
spin_unlock_irqrestore(&io_request_lock, flags);
|
| 2780 |
|
|
return ret;
|
| 2781 |
|
|
}
|
| 2782 |
|
|
|
| 2783 |
|
|
/*
|
| 2784 |
|
|
* idetape_do_request is our request handling function.
|
| 2785 |
|
|
*/
|
| 2786 |
|
|
static ide_startstop_t idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block)
|
| 2787 |
|
|
{
|
| 2788 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 2789 |
|
|
idetape_pc_t *pc;
|
| 2790 |
|
|
struct request *postponed_rq = tape->postponed_rq;
|
| 2791 |
|
|
atapi_status_t status;
|
| 2792 |
|
|
|
| 2793 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2794 |
|
|
if (tape->debug_level >= 5)
|
| 2795 |
|
|
printk(KERN_INFO "ide-tape: rq_status: %d, "
|
| 2796 |
|
|
"rq_dev: %u, cmd: %d, errors: %d\n", rq->rq_status,
|
| 2797 |
|
|
(unsigned int) rq->rq_dev, rq->cmd, rq->errors);
|
| 2798 |
|
|
if (tape->debug_level >= 2)
|
| 2799 |
|
|
printk(KERN_INFO "ide-tape: sector: %ld, "
|
| 2800 |
|
|
"nr_sectors: %ld, current_nr_sectors: %ld\n",
|
| 2801 |
|
|
rq->sector, rq->nr_sectors, rq->current_nr_sectors);
|
| 2802 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 2803 |
|
|
|
| 2804 |
|
|
if (!IDETAPE_RQ_CMD(rq->cmd)) {
|
| 2805 |
|
|
/*
|
| 2806 |
|
|
* We do not support buffer cache originated requests.
|
| 2807 |
|
|
*/
|
| 2808 |
|
|
printk(KERN_NOTICE "ide-tape: %s: Unsupported command in "
|
| 2809 |
|
|
"request queue (%d)\n", drive->name, rq->cmd);
|
| 2810 |
|
|
idetape_do_end_request(drive, 0);
|
| 2811 |
|
|
return ide_stopped;
|
| 2812 |
|
|
}
|
| 2813 |
|
|
|
| 2814 |
|
|
/*
|
| 2815 |
|
|
* Retry a failed packet command
|
| 2816 |
|
|
*/
|
| 2817 |
|
|
if (tape->failed_pc != NULL &&
|
| 2818 |
|
|
tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
|
| 2819 |
|
|
return idetape_issue_packet_command(drive, tape->failed_pc);
|
| 2820 |
|
|
}
|
| 2821 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 2822 |
|
|
if (postponed_rq != NULL)
|
| 2823 |
|
|
if (rq != postponed_rq) {
|
| 2824 |
|
|
printk(KERN_ERR "ide-tape: ide-tape.c bug - "
|
| 2825 |
|
|
"Two DSC requests were queued\n");
|
| 2826 |
|
|
idetape_end_request(drive, 0);
|
| 2827 |
|
|
return ide_stopped;
|
| 2828 |
|
|
}
|
| 2829 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 2830 |
|
|
|
| 2831 |
|
|
tape->postponed_rq = NULL;
|
| 2832 |
|
|
|
| 2833 |
|
|
/*
|
| 2834 |
|
|
* If the tape is still busy, postpone our request and service
|
| 2835 |
|
|
* the other device meanwhile.
|
| 2836 |
|
|
*/
|
| 2837 |
|
|
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
|
| 2838 |
|
|
|
| 2839 |
|
|
/*
|
| 2840 |
|
|
* The OnStream tape drive doesn't support DSC. Assume
|
| 2841 |
|
|
* that DSC is always set.
|
| 2842 |
|
|
*/
|
| 2843 |
|
|
if (tape->onstream)
|
| 2844 |
|
|
status.b.dsc = 1;
|
| 2845 |
|
|
if (!drive->dsc_overlap && rq->cmd != IDETAPE_PC_RQ2)
|
| 2846 |
|
|
set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
|
| 2847 |
|
|
|
| 2848 |
|
|
/*
|
| 2849 |
|
|
* For the OnStream tape, check the current status of the tape
|
| 2850 |
|
|
* internal buffer using data gathered from the buffer fill
|
| 2851 |
|
|
* mode page, and postpone our request, effectively "disconnecting"
|
| 2852 |
|
|
* from the IDE bus, in case the buffer is full (writing) or
|
| 2853 |
|
|
* empty (reading), and there is a danger that our request will
|
| 2854 |
|
|
* hold the IDE bus during actual media access.
|
| 2855 |
|
|
*/
|
| 2856 |
|
|
if (tape->tape_still_time > 100 && tape->tape_still_time < 200)
|
| 2857 |
|
|
tape->measure_insert_time = 1;
|
| 2858 |
|
|
if (tape->req_buffer_fill &&
|
| 2859 |
|
|
(rq->cmd == IDETAPE_WRITE_RQ || rq->cmd == IDETAPE_READ_RQ)) {
|
| 2860 |
|
|
tape->req_buffer_fill = 0;
|
| 2861 |
|
|
tape->writes_since_buffer_fill = 0;
|
| 2862 |
|
|
tape->reads_since_buffer_fill = 0;
|
| 2863 |
|
|
tape->last_buffer_fill = jiffies;
|
| 2864 |
|
|
idetape_queue_onstream_buffer_fill(drive);
|
| 2865 |
|
|
if (time_after(jiffies, tape->insert_time))
|
| 2866 |
|
|
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
|
| 2867 |
|
|
return ide_stopped;
|
| 2868 |
|
|
}
|
| 2869 |
|
|
if (time_after(jiffies, tape->insert_time))
|
| 2870 |
|
|
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
|
| 2871 |
|
|
calculate_speeds(drive);
|
| 2872 |
|
|
if (tape->onstream && tape->max_frames &&
|
| 2873 |
|
|
((rq->cmd == IDETAPE_WRITE_RQ &&
|
| 2874 |
|
|
( tape->cur_frames == tape->max_frames ||
|
| 2875 |
|
|
( tape->speed_control && tape->cur_frames > 5 &&
|
| 2876 |
|
|
(tape->insert_speed > tape->max_insert_speed ||
|
| 2877 |
|
|
(0 /* tape->cur_frames > 30 && tape->tape_still_time > 200 */) ) ) ) ) ||
|
| 2878 |
|
|
(rq->cmd == IDETAPE_READ_RQ &&
|
| 2879 |
|
|
( tape->cur_frames == 0 ||
|
| 2880 |
|
|
( tape->speed_control && (tape->cur_frames < tape->max_frames - 5) &&
|
| 2881 |
|
|
tape->insert_speed > tape->max_insert_speed ) ) && rq->nr_sectors) ) ) {
|
| 2882 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2883 |
|
|
if (tape->debug_level >= 4)
|
| 2884 |
|
|
printk(KERN_INFO "ide-tape: postponing request, "
|
| 2885 |
|
|
"cmd %d, cur %d, max %d\n",
|
| 2886 |
|
|
rq->cmd, tape->cur_frames, tape->max_frames);
|
| 2887 |
|
|
#endif
|
| 2888 |
|
|
if (tape->postpone_cnt++ < 500) {
|
| 2889 |
|
|
status.b.dsc = 0;
|
| 2890 |
|
|
tape->req_buffer_fill = 1;
|
| 2891 |
|
|
}
|
| 2892 |
|
|
#if ONSTREAM_DEBUG
|
| 2893 |
|
|
else if (tape->debug_level >= 4)
|
| 2894 |
|
|
printk(KERN_INFO "ide-tape: %s: postpone_cnt %d\n",
|
| 2895 |
|
|
tape->name, tape->postpone_cnt);
|
| 2896 |
|
|
#endif
|
| 2897 |
|
|
}
|
| 2898 |
|
|
if (!test_and_clear_bit(IDETAPE_IGNORE_DSC, &tape->flags) &&
|
| 2899 |
|
|
!status.b.dsc) {
|
| 2900 |
|
|
if (postponed_rq == NULL) {
|
| 2901 |
|
|
tape->dsc_polling_start = jiffies;
|
| 2902 |
|
|
tape->dsc_polling_frequency = tape->best_dsc_rw_frequency;
|
| 2903 |
|
|
tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT;
|
| 2904 |
|
|
} else if ((signed long) (jiffies - tape->dsc_timeout) > 0) {
|
| 2905 |
|
|
printk(KERN_ERR "ide-tape: %s: DSC timeout\n",
|
| 2906 |
|
|
tape->name);
|
| 2907 |
|
|
if (rq->cmd == IDETAPE_PC_RQ2) {
|
| 2908 |
|
|
idetape_media_access_finished(drive);
|
| 2909 |
|
|
return ide_stopped;
|
| 2910 |
|
|
} else {
|
| 2911 |
|
|
return ide_do_reset(drive);
|
| 2912 |
|
|
}
|
| 2913 |
|
|
} else if (jiffies - tape->dsc_polling_start > IDETAPE_DSC_MA_THRESHOLD)
|
| 2914 |
|
|
tape->dsc_polling_frequency = IDETAPE_DSC_MA_SLOW;
|
| 2915 |
|
|
idetape_postpone_request(drive);
|
| 2916 |
|
|
return ide_stopped;
|
| 2917 |
|
|
}
|
| 2918 |
|
|
switch (rq->cmd) {
|
| 2919 |
|
|
case IDETAPE_READ_RQ:
|
| 2920 |
|
|
tape->buffer_head++;
|
| 2921 |
|
|
#if USE_IOTRACE
|
| 2922 |
|
|
IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
|
| 2923 |
|
|
#endif
|
| 2924 |
|
|
tape->postpone_cnt = 0;
|
| 2925 |
|
|
tape->reads_since_buffer_fill++;
|
| 2926 |
|
|
if (tape->onstream) {
|
| 2927 |
|
|
if (tape->cur_frames - tape->reads_since_buffer_fill <= 0)
|
| 2928 |
|
|
tape->req_buffer_fill = 1;
|
| 2929 |
|
|
if (time_after(jiffies, tape->last_buffer_fill + 5 * HZ / 100))
|
| 2930 |
|
|
tape->req_buffer_fill = 1;
|
| 2931 |
|
|
}
|
| 2932 |
|
|
pc = idetape_next_pc_storage(drive);
|
| 2933 |
|
|
idetape_create_read_cmd(tape, pc, rq->current_nr_sectors, rq->bh);
|
| 2934 |
|
|
break;
|
| 2935 |
|
|
case IDETAPE_WRITE_RQ:
|
| 2936 |
|
|
tape->buffer_head++;
|
| 2937 |
|
|
#if USE_IOTRACE
|
| 2938 |
|
|
IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
|
| 2939 |
|
|
#endif
|
| 2940 |
|
|
tape->postpone_cnt = 0;
|
| 2941 |
|
|
tape->writes_since_buffer_fill++;
|
| 2942 |
|
|
if (tape->onstream) {
|
| 2943 |
|
|
if (tape->cur_frames + tape->writes_since_buffer_fill >= tape->max_frames)
|
| 2944 |
|
|
tape->req_buffer_fill = 1;
|
| 2945 |
|
|
if (time_after(jiffies, tape->last_buffer_fill + 5 * HZ / 100))
|
| 2946 |
|
|
tape->req_buffer_fill = 1;
|
| 2947 |
|
|
calculate_speeds(drive);
|
| 2948 |
|
|
}
|
| 2949 |
|
|
pc = idetape_next_pc_storage(drive);
|
| 2950 |
|
|
idetape_create_write_cmd(tape, pc, rq->current_nr_sectors, rq->bh);
|
| 2951 |
|
|
break;
|
| 2952 |
|
|
case IDETAPE_READ_BUFFER_RQ:
|
| 2953 |
|
|
tape->postpone_cnt = 0;
|
| 2954 |
|
|
pc = idetape_next_pc_storage(drive);
|
| 2955 |
|
|
idetape_create_read_buffer_cmd(tape, pc, rq->current_nr_sectors, rq->bh);
|
| 2956 |
|
|
break;
|
| 2957 |
|
|
case IDETAPE_ABORTED_WRITE_RQ:
|
| 2958 |
|
|
rq->cmd = IDETAPE_WRITE_RQ;
|
| 2959 |
|
|
idetape_end_request(drive, IDETAPE_ERROR_EOD);
|
| 2960 |
|
|
return ide_stopped;
|
| 2961 |
|
|
case IDETAPE_ABORTED_READ_RQ:
|
| 2962 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 2963 |
|
|
if (tape->debug_level >= 2)
|
| 2964 |
|
|
printk(KERN_INFO "ide-tape: %s: detected "
|
| 2965 |
|
|
"aborted read rq\n", tape->name);
|
| 2966 |
|
|
#endif
|
| 2967 |
|
|
rq->cmd = IDETAPE_READ_RQ;
|
| 2968 |
|
|
idetape_end_request(drive, IDETAPE_ERROR_EOD);
|
| 2969 |
|
|
return ide_stopped;
|
| 2970 |
|
|
case IDETAPE_PC_RQ1:
|
| 2971 |
|
|
pc = (idetape_pc_t *) rq->buffer;
|
| 2972 |
|
|
rq->cmd = IDETAPE_PC_RQ2;
|
| 2973 |
|
|
break;
|
| 2974 |
|
|
case IDETAPE_PC_RQ2:
|
| 2975 |
|
|
idetape_media_access_finished(drive);
|
| 2976 |
|
|
return ide_stopped;
|
| 2977 |
|
|
default:
|
| 2978 |
|
|
printk(KERN_ERR "ide-tape: bug in "
|
| 2979 |
|
|
"IDETAPE_RQ_CMD macro\n");
|
| 2980 |
|
|
idetape_end_request(drive, 0);
|
| 2981 |
|
|
return ide_stopped;
|
| 2982 |
|
|
}
|
| 2983 |
|
|
return idetape_issue_packet_command(drive, pc);
|
| 2984 |
|
|
}
|
| 2985 |
|
|
|
| 2986 |
|
|
/*
|
| 2987 |
|
|
* Pipeline related functions
|
| 2988 |
|
|
*/
|
| 2989 |
|
|
static inline int idetape_pipeline_active (idetape_tape_t *tape)
|
| 2990 |
|
|
{
|
| 2991 |
|
|
int rc1, rc2;
|
| 2992 |
|
|
|
| 2993 |
|
|
rc1 = test_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
|
| 2994 |
|
|
rc2 = (tape->active_data_request != NULL);
|
| 2995 |
|
|
return rc1;
|
| 2996 |
|
|
}
|
| 2997 |
|
|
|
| 2998 |
|
|
/*
|
| 2999 |
|
|
* idetape_kmalloc_stage uses __get_free_page to allocate a pipeline
|
| 3000 |
|
|
* stage, along with all the necessary small buffers which together make
|
| 3001 |
|
|
* a buffer of size tape->stage_size (or a bit more). We attempt to
|
| 3002 |
|
|
* combine sequential pages as much as possible.
|
| 3003 |
|
|
*
|
| 3004 |
|
|
* Returns a pointer to the new allocated stage, or NULL if we
|
| 3005 |
|
|
* can't (or don't want to) allocate a stage.
|
| 3006 |
|
|
*
|
| 3007 |
|
|
* Pipeline stages are optional and are used to increase performance.
|
| 3008 |
|
|
* If we can't allocate them, we'll manage without them.
|
| 3009 |
|
|
*/
|
| 3010 |
|
|
static idetape_stage_t *__idetape_kmalloc_stage (idetape_tape_t *tape, int full, int clear)
|
| 3011 |
|
|
{
|
| 3012 |
|
|
idetape_stage_t *stage;
|
| 3013 |
|
|
struct buffer_head *prev_bh, *bh;
|
| 3014 |
|
|
int pages = tape->pages_per_stage;
|
| 3015 |
|
|
char *b_data;
|
| 3016 |
|
|
|
| 3017 |
|
|
if ((stage = (idetape_stage_t *) kmalloc(sizeof(idetape_stage_t),GFP_KERNEL)) == NULL)
|
| 3018 |
|
|
return NULL;
|
| 3019 |
|
|
stage->next = NULL;
|
| 3020 |
|
|
|
| 3021 |
|
|
bh = stage->bh = (struct buffer_head *) kmalloc(sizeof(struct buffer_head), GFP_KERNEL);
|
| 3022 |
|
|
if (bh == NULL)
|
| 3023 |
|
|
goto abort;
|
| 3024 |
|
|
bh->b_reqnext = NULL;
|
| 3025 |
|
|
if ((bh->b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
|
| 3026 |
|
|
goto abort;
|
| 3027 |
|
|
if (clear)
|
| 3028 |
|
|
memset(bh->b_data, 0, PAGE_SIZE);
|
| 3029 |
|
|
bh->b_size = PAGE_SIZE;
|
| 3030 |
|
|
atomic_set(&bh->b_count, full ? bh->b_size : 0);
|
| 3031 |
|
|
set_bit(BH_Lock, &bh->b_state);
|
| 3032 |
|
|
|
| 3033 |
|
|
while (--pages) {
|
| 3034 |
|
|
if ((b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
|
| 3035 |
|
|
goto abort;
|
| 3036 |
|
|
if (clear)
|
| 3037 |
|
|
memset(b_data, 0, PAGE_SIZE);
|
| 3038 |
|
|
if (bh->b_data == b_data + PAGE_SIZE) {
|
| 3039 |
|
|
bh->b_size += PAGE_SIZE;
|
| 3040 |
|
|
bh->b_data -= PAGE_SIZE;
|
| 3041 |
|
|
if (full)
|
| 3042 |
|
|
atomic_add(PAGE_SIZE, &bh->b_count);
|
| 3043 |
|
|
continue;
|
| 3044 |
|
|
}
|
| 3045 |
|
|
if (b_data == bh->b_data + bh->b_size) {
|
| 3046 |
|
|
bh->b_size += PAGE_SIZE;
|
| 3047 |
|
|
if (full)
|
| 3048 |
|
|
atomic_add(PAGE_SIZE, &bh->b_count);
|
| 3049 |
|
|
continue;
|
| 3050 |
|
|
}
|
| 3051 |
|
|
prev_bh = bh;
|
| 3052 |
|
|
if ((bh = (struct buffer_head *) kmalloc(sizeof(struct buffer_head), GFP_KERNEL)) == NULL) {
|
| 3053 |
|
|
free_page((unsigned long) b_data);
|
| 3054 |
|
|
goto abort;
|
| 3055 |
|
|
}
|
| 3056 |
|
|
bh->b_reqnext = NULL;
|
| 3057 |
|
|
bh->b_data = b_data;
|
| 3058 |
|
|
bh->b_size = PAGE_SIZE;
|
| 3059 |
|
|
atomic_set(&bh->b_count, full ? bh->b_size : 0);
|
| 3060 |
|
|
set_bit(BH_Lock, &bh->b_state);
|
| 3061 |
|
|
prev_bh->b_reqnext = bh;
|
| 3062 |
|
|
}
|
| 3063 |
|
|
bh->b_size -= tape->excess_bh_size;
|
| 3064 |
|
|
if (full)
|
| 3065 |
|
|
atomic_sub(tape->excess_bh_size, &bh->b_count);
|
| 3066 |
|
|
if (tape->onstream)
|
| 3067 |
|
|
stage->aux = (os_aux_t *) (bh->b_data + bh->b_size - OS_AUX_SIZE);
|
| 3068 |
|
|
return stage;
|
| 3069 |
|
|
abort:
|
| 3070 |
|
|
__idetape_kfree_stage(stage);
|
| 3071 |
|
|
return NULL;
|
| 3072 |
|
|
}
|
| 3073 |
|
|
|
| 3074 |
|
|
static idetape_stage_t *idetape_kmalloc_stage (idetape_tape_t *tape)
|
| 3075 |
|
|
{
|
| 3076 |
|
|
idetape_stage_t *cache_stage = tape->cache_stage;
|
| 3077 |
|
|
|
| 3078 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3079 |
|
|
if (tape->debug_level >= 4)
|
| 3080 |
|
|
printk (KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 3081 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3082 |
|
|
|
| 3083 |
|
|
if (tape->nr_stages >= tape->max_stages)
|
| 3084 |
|
|
return NULL;
|
| 3085 |
|
|
if (cache_stage != NULL) {
|
| 3086 |
|
|
tape->cache_stage = NULL;
|
| 3087 |
|
|
return cache_stage;
|
| 3088 |
|
|
}
|
| 3089 |
|
|
return __idetape_kmalloc_stage(tape, 0, 0);
|
| 3090 |
|
|
}
|
| 3091 |
|
|
|
| 3092 |
|
|
static void idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char *buf, int n)
|
| 3093 |
|
|
{
|
| 3094 |
|
|
struct buffer_head *bh = tape->bh;
|
| 3095 |
|
|
int count;
|
| 3096 |
|
|
|
| 3097 |
|
|
while (n) {
|
| 3098 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 3099 |
|
|
if (bh == NULL) {
|
| 3100 |
|
|
printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
|
| 3101 |
|
|
__FUNCTION__);
|
| 3102 |
|
|
return;
|
| 3103 |
|
|
}
|
| 3104 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 3105 |
|
|
count = IDE_MIN(bh->b_size - atomic_read(&bh->b_count), n);
|
| 3106 |
|
|
copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count);
|
| 3107 |
|
|
n -= count;
|
| 3108 |
|
|
atomic_add(count, &bh->b_count);
|
| 3109 |
|
|
buf += count;
|
| 3110 |
|
|
if (atomic_read(&bh->b_count) == bh->b_size) {
|
| 3111 |
|
|
bh = bh->b_reqnext;
|
| 3112 |
|
|
if (bh)
|
| 3113 |
|
|
atomic_set(&bh->b_count, 0);
|
| 3114 |
|
|
}
|
| 3115 |
|
|
}
|
| 3116 |
|
|
tape->bh = bh;
|
| 3117 |
|
|
}
|
| 3118 |
|
|
|
| 3119 |
|
|
static void idetape_copy_stage_to_user (idetape_tape_t *tape, char *buf, idetape_stage_t *stage, int n)
|
| 3120 |
|
|
{
|
| 3121 |
|
|
struct buffer_head *bh = tape->bh;
|
| 3122 |
|
|
int count;
|
| 3123 |
|
|
|
| 3124 |
|
|
while (n) {
|
| 3125 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 3126 |
|
|
if (bh == NULL) {
|
| 3127 |
|
|
printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
|
| 3128 |
|
|
__FUNCTION__);
|
| 3129 |
|
|
return;
|
| 3130 |
|
|
}
|
| 3131 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 3132 |
|
|
count = IDE_MIN(tape->b_count, n);
|
| 3133 |
|
|
copy_to_user(buf, tape->b_data, count);
|
| 3134 |
|
|
n -= count;
|
| 3135 |
|
|
tape->b_data += count;
|
| 3136 |
|
|
tape->b_count -= count;
|
| 3137 |
|
|
buf += count;
|
| 3138 |
|
|
if (!tape->b_count) {
|
| 3139 |
|
|
tape->bh = bh = bh->b_reqnext;
|
| 3140 |
|
|
if (bh) {
|
| 3141 |
|
|
tape->b_data = bh->b_data;
|
| 3142 |
|
|
tape->b_count = atomic_read(&bh->b_count);
|
| 3143 |
|
|
}
|
| 3144 |
|
|
}
|
| 3145 |
|
|
}
|
| 3146 |
|
|
}
|
| 3147 |
|
|
|
| 3148 |
|
|
static void idetape_init_merge_stage (idetape_tape_t *tape)
|
| 3149 |
|
|
{
|
| 3150 |
|
|
struct buffer_head *bh = tape->merge_stage->bh;
|
| 3151 |
|
|
|
| 3152 |
|
|
tape->bh = bh;
|
| 3153 |
|
|
if (tape->chrdev_direction == idetape_direction_write) {
|
| 3154 |
|
|
atomic_set(&bh->b_count, 0);
|
| 3155 |
|
|
} else {
|
| 3156 |
|
|
tape->b_data = bh->b_data;
|
| 3157 |
|
|
tape->b_count = atomic_read(&bh->b_count);
|
| 3158 |
|
|
}
|
| 3159 |
|
|
}
|
| 3160 |
|
|
|
| 3161 |
|
|
static void idetape_switch_buffers (idetape_tape_t *tape, idetape_stage_t *stage)
|
| 3162 |
|
|
{
|
| 3163 |
|
|
struct buffer_head *tmp;
|
| 3164 |
|
|
os_aux_t *tmp_aux;
|
| 3165 |
|
|
|
| 3166 |
|
|
tmp = stage->bh;
|
| 3167 |
|
|
tmp_aux = stage->aux;
|
| 3168 |
|
|
stage->bh = tape->merge_stage->bh;
|
| 3169 |
|
|
stage->aux = tape->merge_stage->aux;
|
| 3170 |
|
|
tape->merge_stage->bh = tmp;
|
| 3171 |
|
|
tape->merge_stage->aux = tmp_aux;
|
| 3172 |
|
|
idetape_init_merge_stage (tape);
|
| 3173 |
|
|
}
|
| 3174 |
|
|
|
| 3175 |
|
|
/*
|
| 3176 |
|
|
* idetape_add_stage_tail adds a new stage at the end of the pipeline.
|
| 3177 |
|
|
*/
|
| 3178 |
|
|
static void idetape_add_stage_tail (ide_drive_t *drive,idetape_stage_t *stage)
|
| 3179 |
|
|
{
|
| 3180 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3181 |
|
|
unsigned long flags;
|
| 3182 |
|
|
|
| 3183 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3184 |
|
|
if (tape->debug_level >= 4)
|
| 3185 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 3186 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3187 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 3188 |
|
|
stage->next = NULL;
|
| 3189 |
|
|
if (tape->last_stage != NULL)
|
| 3190 |
|
|
tape->last_stage->next=stage;
|
| 3191 |
|
|
else
|
| 3192 |
|
|
tape->first_stage = tape->next_stage=stage;
|
| 3193 |
|
|
tape->last_stage = stage;
|
| 3194 |
|
|
if (tape->next_stage == NULL)
|
| 3195 |
|
|
tape->next_stage = tape->last_stage;
|
| 3196 |
|
|
tape->nr_stages++;
|
| 3197 |
|
|
tape->nr_pending_stages++;
|
| 3198 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3199 |
|
|
}
|
| 3200 |
|
|
|
| 3201 |
|
|
/*
|
| 3202 |
|
|
* Initialize the OnStream AUX
|
| 3203 |
|
|
*/
|
| 3204 |
|
|
static void idetape_init_stage (ide_drive_t *drive, idetape_stage_t *stage, int frame_type, int logical_blk_num)
|
| 3205 |
|
|
{
|
| 3206 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3207 |
|
|
os_aux_t *aux = stage->aux;
|
| 3208 |
|
|
os_partition_t *par = &aux->partition;
|
| 3209 |
|
|
os_dat_t *dat = &aux->dat;
|
| 3210 |
|
|
|
| 3211 |
|
|
if (!tape->onstream || tape->raw)
|
| 3212 |
|
|
return;
|
| 3213 |
|
|
memset(aux, 0, sizeof(*aux));
|
| 3214 |
|
|
aux->format_id = htonl(0);
|
| 3215 |
|
|
memcpy(aux->application_sig, "LIN3", 4);
|
| 3216 |
|
|
aux->hdwr = htonl(0);
|
| 3217 |
|
|
aux->frame_type = frame_type;
|
| 3218 |
|
|
|
| 3219 |
|
|
if (frame_type == OS_FRAME_TYPE_HEADER) {
|
| 3220 |
|
|
aux->update_frame_cntr = htonl(tape->update_frame_cntr);
|
| 3221 |
|
|
par->partition_num = OS_CONFIG_PARTITION;
|
| 3222 |
|
|
par->par_desc_ver = OS_PARTITION_VERSION;
|
| 3223 |
|
|
par->wrt_pass_cntr = htons(0xffff);
|
| 3224 |
|
|
par->first_frame_addr = htonl(0);
|
| 3225 |
|
|
par->last_frame_addr = htonl(0xbb7); /* 2999 */
|
| 3226 |
|
|
aux->frame_seq_num = htonl(0);
|
| 3227 |
|
|
aux->logical_blk_num_high = htonl(0);
|
| 3228 |
|
|
aux->logical_blk_num = htonl(0);
|
| 3229 |
|
|
aux->next_mark_addr = htonl(tape->first_mark_addr);
|
| 3230 |
|
|
} else {
|
| 3231 |
|
|
aux->update_frame_cntr = htonl(0);
|
| 3232 |
|
|
par->partition_num = OS_DATA_PARTITION;
|
| 3233 |
|
|
par->par_desc_ver = OS_PARTITION_VERSION;
|
| 3234 |
|
|
par->wrt_pass_cntr = htons(tape->wrt_pass_cntr);
|
| 3235 |
|
|
par->first_frame_addr = htonl(OS_DATA_STARTFRAME1);
|
| 3236 |
|
|
par->last_frame_addr = htonl(tape->capacity);
|
| 3237 |
|
|
aux->frame_seq_num = htonl(logical_blk_num);
|
| 3238 |
|
|
aux->logical_blk_num_high = htonl(0);
|
| 3239 |
|
|
aux->logical_blk_num = htonl(logical_blk_num);
|
| 3240 |
|
|
dat->dat_sz = 8;
|
| 3241 |
|
|
dat->reserved1 = 0;
|
| 3242 |
|
|
dat->entry_cnt = 1;
|
| 3243 |
|
|
dat->reserved3 = 0;
|
| 3244 |
|
|
if (frame_type == OS_FRAME_TYPE_DATA)
|
| 3245 |
|
|
dat->dat_list[0].blk_sz = htonl(32 * 1024);
|
| 3246 |
|
|
else
|
| 3247 |
|
|
dat->dat_list[0].blk_sz = 0;
|
| 3248 |
|
|
dat->dat_list[0].blk_cnt = htons(1);
|
| 3249 |
|
|
if (frame_type == OS_FRAME_TYPE_MARKER)
|
| 3250 |
|
|
dat->dat_list[0].flags = OS_DAT_FLAGS_MARK;
|
| 3251 |
|
|
else
|
| 3252 |
|
|
dat->dat_list[0].flags = OS_DAT_FLAGS_DATA;
|
| 3253 |
|
|
dat->dat_list[0].reserved = 0;
|
| 3254 |
|
|
}
|
| 3255 |
|
|
/* shouldn't this be htonl ?? */
|
| 3256 |
|
|
aux->filemark_cnt = ntohl(tape->filemark_cnt);
|
| 3257 |
|
|
/* shouldn't this be htonl ?? */
|
| 3258 |
|
|
aux->phys_fm = ntohl(0xffffffff);
|
| 3259 |
|
|
/* shouldn't this be htonl ?? */
|
| 3260 |
|
|
aux->last_mark_addr = ntohl(tape->last_mark_addr);
|
| 3261 |
|
|
}
|
| 3262 |
|
|
|
| 3263 |
|
|
/*
|
| 3264 |
|
|
* idetape_wait_for_request installs a completion in a pending request
|
| 3265 |
|
|
* and sleeps until it is serviced.
|
| 3266 |
|
|
*
|
| 3267 |
|
|
* The caller should ensure that the request will not be serviced
|
| 3268 |
|
|
* before we install the completion (usually by disabling interrupts).
|
| 3269 |
|
|
*/
|
| 3270 |
|
|
static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
|
| 3271 |
|
|
{
|
| 3272 |
|
|
DECLARE_COMPLETION(wait);
|
| 3273 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3274 |
|
|
|
| 3275 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 3276 |
|
|
if (rq == NULL || !IDETAPE_RQ_CMD (rq->cmd)) {
|
| 3277 |
|
|
printk(KERN_ERR "ide-tape: bug: Trying to sleep on "
|
| 3278 |
|
|
"non-valid request\n");
|
| 3279 |
|
|
return;
|
| 3280 |
|
|
}
|
| 3281 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 3282 |
|
|
rq->waiting = &wait;
|
| 3283 |
|
|
tape->waiting = &wait;
|
| 3284 |
|
|
spin_unlock(&tape->spinlock);
|
| 3285 |
|
|
wait_for_completion(&wait);
|
| 3286 |
|
|
/* The stage and its struct request have been deallocated */
|
| 3287 |
|
|
tape->waiting = NULL;
|
| 3288 |
|
|
spin_lock_irq(&tape->spinlock);
|
| 3289 |
|
|
}
|
| 3290 |
|
|
|
| 3291 |
|
|
static ide_startstop_t idetape_read_position_callback (ide_drive_t *drive)
|
| 3292 |
|
|
{
|
| 3293 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3294 |
|
|
idetape_read_position_result_t *result;
|
| 3295 |
|
|
|
| 3296 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3297 |
|
|
if (tape->debug_level >= 4)
|
| 3298 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 3299 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3300 |
|
|
|
| 3301 |
|
|
if (!tape->pc->error) {
|
| 3302 |
|
|
result = (idetape_read_position_result_t *) tape->pc->buffer;
|
| 3303 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3304 |
|
|
if (tape->debug_level >= 2)
|
| 3305 |
|
|
printk(KERN_INFO "ide-tape: BOP - %s\n",
|
| 3306 |
|
|
result->bop ? "Yes":"No");
|
| 3307 |
|
|
if (tape->debug_level >= 2)
|
| 3308 |
|
|
printk(KERN_INFO "ide-tape: EOP - %s\n",
|
| 3309 |
|
|
result->eop ? "Yes":"No");
|
| 3310 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3311 |
|
|
if (result->bpu) {
|
| 3312 |
|
|
printk(KERN_INFO "ide-tape: Block location is "
|
| 3313 |
|
|
"unknown to the tape\n");
|
| 3314 |
|
|
clear_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
|
| 3315 |
|
|
idetape_end_request(drive, 0);
|
| 3316 |
|
|
} else {
|
| 3317 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3318 |
|
|
if (tape->debug_level >= 2)
|
| 3319 |
|
|
printk(KERN_INFO "ide-tape: Block Location "
|
| 3320 |
|
|
"- %u\n", ntohl(result->first_block));
|
| 3321 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3322 |
|
|
tape->partition = result->partition;
|
| 3323 |
|
|
tape->first_frame_position = ntohl(result->first_block);
|
| 3324 |
|
|
tape->last_frame_position = ntohl(result->last_block);
|
| 3325 |
|
|
tape->blocks_in_buffer = result->blocks_in_buffer[2];
|
| 3326 |
|
|
set_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
|
| 3327 |
|
|
idetape_end_request(drive, 1);
|
| 3328 |
|
|
}
|
| 3329 |
|
|
} else {
|
| 3330 |
|
|
idetape_end_request(drive, 0);
|
| 3331 |
|
|
}
|
| 3332 |
|
|
return ide_stopped;
|
| 3333 |
|
|
}
|
| 3334 |
|
|
|
| 3335 |
|
|
/*
|
| 3336 |
|
|
* idetape_create_write_filemark_cmd will:
|
| 3337 |
|
|
*
|
| 3338 |
|
|
* 1. Write a filemark if write_filemark=1.
|
| 3339 |
|
|
* 2. Flush the device buffers without writing a filemark
|
| 3340 |
|
|
* if write_filemark=0.
|
| 3341 |
|
|
*
|
| 3342 |
|
|
*/
|
| 3343 |
|
|
static void idetape_create_write_filemark_cmd (ide_drive_t *drive, idetape_pc_t *pc,int write_filemark)
|
| 3344 |
|
|
{
|
| 3345 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3346 |
|
|
|
| 3347 |
|
|
idetape_init_pc(pc);
|
| 3348 |
|
|
pc->c[0] = IDETAPE_WRITE_FILEMARK_CMD;
|
| 3349 |
|
|
if (tape->onstream)
|
| 3350 |
|
|
pc->c[1] = 1; /* Immed bit */
|
| 3351 |
|
|
pc->c[4] = write_filemark; /* not used for OnStream ?? */
|
| 3352 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3353 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3354 |
|
|
}
|
| 3355 |
|
|
|
| 3356 |
|
|
static void idetape_create_test_unit_ready_cmd(idetape_pc_t *pc)
|
| 3357 |
|
|
{
|
| 3358 |
|
|
idetape_init_pc(pc);
|
| 3359 |
|
|
pc->c[0] = IDETAPE_TEST_UNIT_READY_CMD;
|
| 3360 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3361 |
|
|
}
|
| 3362 |
|
|
|
| 3363 |
|
|
/*
|
| 3364 |
|
|
* idetape_queue_pc_tail is based on the following functions:
|
| 3365 |
|
|
*
|
| 3366 |
|
|
* ide_do_drive_cmd from ide.c
|
| 3367 |
|
|
* cdrom_queue_request and cdrom_queue_packet_command from ide-cd.c
|
| 3368 |
|
|
*
|
| 3369 |
|
|
* We add a special packet command request to the tail of the request
|
| 3370 |
|
|
* queue, and wait for it to be serviced.
|
| 3371 |
|
|
*
|
| 3372 |
|
|
* This is not to be called from within the request handling part
|
| 3373 |
|
|
* of the driver ! We allocate here data in the stack, and it is valid
|
| 3374 |
|
|
* until the request is finished. This is not the case for the bottom
|
| 3375 |
|
|
* part of the driver, where we are always leaving the functions to wait
|
| 3376 |
|
|
* for an interrupt or a timer event.
|
| 3377 |
|
|
*
|
| 3378 |
|
|
* From the bottom part of the driver, we should allocate safe memory
|
| 3379 |
|
|
* using idetape_next_pc_storage and idetape_next_rq_storage, and add
|
| 3380 |
|
|
* the request to the request list without waiting for it to be serviced !
|
| 3381 |
|
|
* In that case, we usually use idetape_queue_pc_head.
|
| 3382 |
|
|
*/
|
| 3383 |
|
|
static int __idetape_queue_pc_tail (ide_drive_t *drive, idetape_pc_t *pc)
|
| 3384 |
|
|
{
|
| 3385 |
|
|
struct request rq;
|
| 3386 |
|
|
|
| 3387 |
|
|
ide_init_drive_cmd(&rq);
|
| 3388 |
|
|
rq.buffer = (char *) pc;
|
| 3389 |
|
|
rq.cmd = IDETAPE_PC_RQ1;
|
| 3390 |
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
| 3391 |
|
|
}
|
| 3392 |
|
|
|
| 3393 |
|
|
static void idetape_create_load_unload_cmd (ide_drive_t *drive, idetape_pc_t *pc,int cmd)
|
| 3394 |
|
|
{
|
| 3395 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3396 |
|
|
|
| 3397 |
|
|
idetape_init_pc(pc);
|
| 3398 |
|
|
pc->c[0] = IDETAPE_LOAD_UNLOAD_CMD;
|
| 3399 |
|
|
pc->c[4] = cmd;
|
| 3400 |
|
|
if (tape->onstream) {
|
| 3401 |
|
|
pc->c[1] = 1;
|
| 3402 |
|
|
if (cmd == !IDETAPE_LU_LOAD_MASK)
|
| 3403 |
|
|
pc->c[4] = 4;
|
| 3404 |
|
|
}
|
| 3405 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3406 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3407 |
|
|
}
|
| 3408 |
|
|
|
| 3409 |
|
|
static int idetape_wait_ready (ide_drive_t *drive, unsigned long long timeout)
|
| 3410 |
|
|
{
|
| 3411 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3412 |
|
|
idetape_pc_t pc;
|
| 3413 |
|
|
|
| 3414 |
|
|
/*
|
| 3415 |
|
|
* Wait for the tape to become ready
|
| 3416 |
|
|
*/
|
| 3417 |
|
|
timeout += jiffies;
|
| 3418 |
|
|
while (time_before(jiffies, timeout)) {
|
| 3419 |
|
|
idetape_create_test_unit_ready_cmd(&pc);
|
| 3420 |
|
|
if (!__idetape_queue_pc_tail(drive, &pc))
|
| 3421 |
|
|
return 0;
|
| 3422 |
|
|
if (tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2) {
|
| 3423 |
|
|
idetape_create_load_unload_cmd(drive, &pc, IDETAPE_LU_LOAD_MASK);
|
| 3424 |
|
|
__idetape_queue_pc_tail(drive, &pc);
|
| 3425 |
|
|
idetape_create_test_unit_ready_cmd(&pc);
|
| 3426 |
|
|
if (!__idetape_queue_pc_tail(drive, &pc))
|
| 3427 |
|
|
return 0;
|
| 3428 |
|
|
}
|
| 3429 |
|
|
if (!(tape->sense_key == 2 && tape->asc == 4 &&
|
| 3430 |
|
|
(tape->ascq == 1 || tape->ascq == 8)))
|
| 3431 |
|
|
break;
|
| 3432 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 3433 |
|
|
schedule_timeout(HZ / 10);
|
| 3434 |
|
|
}
|
| 3435 |
|
|
return -EIO;
|
| 3436 |
|
|
}
|
| 3437 |
|
|
|
| 3438 |
|
|
static int idetape_queue_pc_tail (ide_drive_t *drive,idetape_pc_t *pc)
|
| 3439 |
|
|
{
|
| 3440 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3441 |
|
|
int rc;
|
| 3442 |
|
|
|
| 3443 |
|
|
rc = __idetape_queue_pc_tail(drive, pc);
|
| 3444 |
|
|
if (rc)
|
| 3445 |
|
|
return rc;
|
| 3446 |
|
|
if (tape->onstream && test_bit(PC_WAIT_FOR_DSC, &pc->flags)) {
|
| 3447 |
|
|
/* AJN-4: Changed from 5 to 10 minutes;
|
| 3448 |
|
|
* because retension takes approx.
|
| 3449 |
|
|
* 8:20 with Onstream 30GB tape
|
| 3450 |
|
|
*/
|
| 3451 |
|
|
rc = idetape_wait_ready(drive, 60 * 10 * HZ);
|
| 3452 |
|
|
}
|
| 3453 |
|
|
return rc;
|
| 3454 |
|
|
}
|
| 3455 |
|
|
|
| 3456 |
|
|
static int idetape_flush_tape_buffers (ide_drive_t *drive)
|
| 3457 |
|
|
{
|
| 3458 |
|
|
idetape_pc_t pc;
|
| 3459 |
|
|
int rc;
|
| 3460 |
|
|
|
| 3461 |
|
|
idetape_create_write_filemark_cmd(drive, &pc, 0);
|
| 3462 |
|
|
if ((rc = idetape_queue_pc_tail (drive, &pc)))
|
| 3463 |
|
|
return rc;
|
| 3464 |
|
|
idetape_wait_ready(drive, 60 * 5 * HZ);
|
| 3465 |
|
|
return 0;
|
| 3466 |
|
|
}
|
| 3467 |
|
|
|
| 3468 |
|
|
static void idetape_create_read_position_cmd (idetape_pc_t *pc)
|
| 3469 |
|
|
{
|
| 3470 |
|
|
idetape_init_pc(pc);
|
| 3471 |
|
|
pc->c[0] = IDETAPE_READ_POSITION_CMD;
|
| 3472 |
|
|
pc->request_transfer = 20;
|
| 3473 |
|
|
pc->callback = &idetape_read_position_callback;
|
| 3474 |
|
|
}
|
| 3475 |
|
|
|
| 3476 |
|
|
static int idetape_read_position (ide_drive_t *drive)
|
| 3477 |
|
|
{
|
| 3478 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3479 |
|
|
idetape_pc_t pc;
|
| 3480 |
|
|
int position;
|
| 3481 |
|
|
|
| 3482 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3483 |
|
|
if (tape->debug_level >= 4)
|
| 3484 |
|
|
printk (KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 3485 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3486 |
|
|
|
| 3487 |
|
|
idetape_create_read_position_cmd(&pc);
|
| 3488 |
|
|
if (idetape_queue_pc_tail(drive, &pc))
|
| 3489 |
|
|
return -1;
|
| 3490 |
|
|
position = tape->first_frame_position;
|
| 3491 |
|
|
return position;
|
| 3492 |
|
|
}
|
| 3493 |
|
|
|
| 3494 |
|
|
static void idetape_create_locate_cmd (ide_drive_t *drive, idetape_pc_t *pc, unsigned int block, u8 partition, int skip)
|
| 3495 |
|
|
{
|
| 3496 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3497 |
|
|
|
| 3498 |
|
|
idetape_init_pc(pc);
|
| 3499 |
|
|
pc->c[0] = IDETAPE_LOCATE_CMD;
|
| 3500 |
|
|
if (tape->onstream)
|
| 3501 |
|
|
pc->c[1] = 1; /* Immediate bit */
|
| 3502 |
|
|
else
|
| 3503 |
|
|
pc->c[1] = 2;
|
| 3504 |
|
|
put_unaligned(htonl(block), (unsigned int *) &pc->c[3]);
|
| 3505 |
|
|
pc->c[8] = partition;
|
| 3506 |
|
|
if (tape->onstream)
|
| 3507 |
|
|
/*
|
| 3508 |
|
|
* Set SKIP bit.
|
| 3509 |
|
|
* In case of write error this will write buffered
|
| 3510 |
|
|
* data in the drive to this new position!
|
| 3511 |
|
|
*/
|
| 3512 |
|
|
pc->c[9] = skip << 7;
|
| 3513 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3514 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3515 |
|
|
}
|
| 3516 |
|
|
|
| 3517 |
|
|
static int idetape_create_prevent_cmd (ide_drive_t *drive, idetape_pc_t *pc, int prevent)
|
| 3518 |
|
|
{
|
| 3519 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3520 |
|
|
|
| 3521 |
|
|
if (!tape->capabilities.lock)
|
| 3522 |
|
|
return 0;
|
| 3523 |
|
|
|
| 3524 |
|
|
idetape_init_pc(pc);
|
| 3525 |
|
|
pc->c[0] = IDETAPE_PREVENT_CMD;
|
| 3526 |
|
|
pc->c[4] = prevent;
|
| 3527 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3528 |
|
|
return 1;
|
| 3529 |
|
|
}
|
| 3530 |
|
|
|
| 3531 |
|
|
static int __idetape_discard_read_pipeline (ide_drive_t *drive)
|
| 3532 |
|
|
{
|
| 3533 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3534 |
|
|
unsigned long flags;
|
| 3535 |
|
|
int cnt;
|
| 3536 |
|
|
|
| 3537 |
|
|
if (tape->chrdev_direction != idetape_direction_read)
|
| 3538 |
|
|
return 0;
|
| 3539 |
|
|
cnt = tape->merge_stage_size / tape->tape_block_size;
|
| 3540 |
|
|
if (test_and_clear_bit(IDETAPE_FILEMARK, &tape->flags))
|
| 3541 |
|
|
++cnt; /* Filemarks count as 1 sector */
|
| 3542 |
|
|
tape->merge_stage_size = 0;
|
| 3543 |
|
|
if (tape->merge_stage != NULL) {
|
| 3544 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 3545 |
|
|
tape->merge_stage = NULL;
|
| 3546 |
|
|
}
|
| 3547 |
|
|
clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 3548 |
|
|
tape->chrdev_direction = idetape_direction_none;
|
| 3549 |
|
|
|
| 3550 |
|
|
if (tape->first_stage == NULL)
|
| 3551 |
|
|
return 0;
|
| 3552 |
|
|
|
| 3553 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 3554 |
|
|
tape->next_stage = NULL;
|
| 3555 |
|
|
if (idetape_pipeline_active(tape))
|
| 3556 |
|
|
idetape_wait_for_request(drive, tape->active_data_request);
|
| 3557 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3558 |
|
|
|
| 3559 |
|
|
while (tape->first_stage != NULL) {
|
| 3560 |
|
|
struct request *rq_ptr = &tape->first_stage->rq;
|
| 3561 |
|
|
|
| 3562 |
|
|
cnt += rq_ptr->nr_sectors - rq_ptr->current_nr_sectors;
|
| 3563 |
|
|
if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
|
| 3564 |
|
|
++cnt;
|
| 3565 |
|
|
idetape_remove_stage_head(drive);
|
| 3566 |
|
|
}
|
| 3567 |
|
|
tape->nr_pending_stages = 0;
|
| 3568 |
|
|
tape->max_stages = tape->min_pipeline;
|
| 3569 |
|
|
return cnt;
|
| 3570 |
|
|
}
|
| 3571 |
|
|
|
| 3572 |
|
|
/*
|
| 3573 |
|
|
* idetape_position_tape positions the tape to the requested block
|
| 3574 |
|
|
* using the LOCATE packet command. A READ POSITION command is then
|
| 3575 |
|
|
* issued to check where we are positioned.
|
| 3576 |
|
|
*
|
| 3577 |
|
|
* Like all higher level operations, we queue the commands at the tail
|
| 3578 |
|
|
* of the request queue and wait for their completion.
|
| 3579 |
|
|
*
|
| 3580 |
|
|
*/
|
| 3581 |
|
|
static int idetape_position_tape (ide_drive_t *drive, unsigned int block, u8 partition, int skip)
|
| 3582 |
|
|
{
|
| 3583 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3584 |
|
|
int retval;
|
| 3585 |
|
|
idetape_pc_t pc;
|
| 3586 |
|
|
|
| 3587 |
|
|
if (tape->chrdev_direction == idetape_direction_read)
|
| 3588 |
|
|
__idetape_discard_read_pipeline(drive);
|
| 3589 |
|
|
idetape_wait_ready(drive, 60 * 5 * HZ);
|
| 3590 |
|
|
idetape_create_locate_cmd(drive, &pc, block, partition, skip);
|
| 3591 |
|
|
retval = idetape_queue_pc_tail(drive, &pc);
|
| 3592 |
|
|
if (retval)
|
| 3593 |
|
|
return (retval);
|
| 3594 |
|
|
|
| 3595 |
|
|
idetape_create_read_position_cmd(&pc);
|
| 3596 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 3597 |
|
|
}
|
| 3598 |
|
|
|
| 3599 |
|
|
static void idetape_discard_read_pipeline (ide_drive_t *drive, int restore_position)
|
| 3600 |
|
|
{
|
| 3601 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3602 |
|
|
int cnt;
|
| 3603 |
|
|
int seek, position;
|
| 3604 |
|
|
|
| 3605 |
|
|
cnt = __idetape_discard_read_pipeline(drive);
|
| 3606 |
|
|
if (restore_position) {
|
| 3607 |
|
|
position = idetape_read_position(drive);
|
| 3608 |
|
|
#if ONSTREAM_DEBUG
|
| 3609 |
|
|
if (tape->debug_level >= 2)
|
| 3610 |
|
|
printk(KERN_INFO "ide-tape: address %u, nr_stages %d\n",
|
| 3611 |
|
|
position, cnt);
|
| 3612 |
|
|
#endif
|
| 3613 |
|
|
seek = position > cnt ? position - cnt : 0;
|
| 3614 |
|
|
if (idetape_position_tape(drive, seek, 0, 0)) {
|
| 3615 |
|
|
printk(KERN_INFO "ide-tape: %s: position_tape "
|
| 3616 |
|
|
"failed in discard_pipeline()\n", tape->name);
|
| 3617 |
|
|
return;
|
| 3618 |
|
|
}
|
| 3619 |
|
|
}
|
| 3620 |
|
|
}
|
| 3621 |
|
|
|
| 3622 |
|
|
static void idetape_update_stats (ide_drive_t *drive)
|
| 3623 |
|
|
{
|
| 3624 |
|
|
idetape_pc_t pc;
|
| 3625 |
|
|
|
| 3626 |
|
|
idetape_create_mode_sense_cmd(&pc, IDETAPE_BUFFER_FILLING_PAGE);
|
| 3627 |
|
|
pc.callback = idetape_onstream_buffer_fill_callback;
|
| 3628 |
|
|
(void) idetape_queue_pc_tail(drive, &pc);
|
| 3629 |
|
|
}
|
| 3630 |
|
|
|
| 3631 |
|
|
/*
|
| 3632 |
|
|
* idetape_queue_rw_tail generates a read/write request for the block
|
| 3633 |
|
|
* device interface and wait for it to be serviced.
|
| 3634 |
|
|
*/
|
| 3635 |
|
|
static int idetape_queue_rw_tail (ide_drive_t *drive, int cmd, int blocks, struct buffer_head *bh)
|
| 3636 |
|
|
{
|
| 3637 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3638 |
|
|
struct request rq;
|
| 3639 |
|
|
|
| 3640 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3641 |
|
|
if (tape->debug_level >= 2)
|
| 3642 |
|
|
printk(KERN_INFO "ide-tape: %s: cmd=%d\n", __FUNCTION__, cmd);
|
| 3643 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3644 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 3645 |
|
|
if (idetape_pipeline_active (tape)) {
|
| 3646 |
|
|
printk(KERN_ERR "ide-tape: bug: the pipeline is active in %s\n",
|
| 3647 |
|
|
__FUNCTION__);
|
| 3648 |
|
|
return (0);
|
| 3649 |
|
|
}
|
| 3650 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 3651 |
|
|
|
| 3652 |
|
|
ide_init_drive_cmd(&rq);
|
| 3653 |
|
|
rq.bh = bh;
|
| 3654 |
|
|
rq.cmd = cmd;
|
| 3655 |
|
|
rq.sector = tape->first_frame_position;
|
| 3656 |
|
|
rq.nr_sectors = rq.current_nr_sectors = blocks;
|
| 3657 |
|
|
if (tape->onstream)
|
| 3658 |
|
|
tape->postpone_cnt = 600;
|
| 3659 |
|
|
(void) ide_do_drive_cmd(drive, &rq, ide_wait);
|
| 3660 |
|
|
|
| 3661 |
|
|
if (cmd != IDETAPE_READ_RQ && cmd != IDETAPE_WRITE_RQ)
|
| 3662 |
|
|
return 0;
|
| 3663 |
|
|
|
| 3664 |
|
|
if (tape->merge_stage)
|
| 3665 |
|
|
idetape_init_merge_stage(tape);
|
| 3666 |
|
|
if (rq.errors == IDETAPE_ERROR_GENERAL)
|
| 3667 |
|
|
return -EIO;
|
| 3668 |
|
|
return (tape->tape_block_size * (blocks-rq.current_nr_sectors));
|
| 3669 |
|
|
}
|
| 3670 |
|
|
|
| 3671 |
|
|
/*
|
| 3672 |
|
|
* Read back the drive's internal buffer contents, as a part
|
| 3673 |
|
|
* of the write error recovery mechanism for old OnStream
|
| 3674 |
|
|
* firmware revisions.
|
| 3675 |
|
|
*/
|
| 3676 |
|
|
static void idetape_onstream_read_back_buffer (ide_drive_t *drive)
|
| 3677 |
|
|
{
|
| 3678 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3679 |
|
|
int frames, i, logical_blk_num;
|
| 3680 |
|
|
idetape_stage_t *stage, *first = NULL, *last = NULL;
|
| 3681 |
|
|
os_aux_t *aux;
|
| 3682 |
|
|
struct request *rq;
|
| 3683 |
|
|
unsigned char *p;
|
| 3684 |
|
|
unsigned long flags;
|
| 3685 |
|
|
|
| 3686 |
|
|
idetape_update_stats(drive);
|
| 3687 |
|
|
frames = tape->cur_frames;
|
| 3688 |
|
|
logical_blk_num = ntohl(tape->first_stage->aux->logical_blk_num) - frames;
|
| 3689 |
|
|
printk(KERN_INFO "ide-tape: %s: reading back %d frames from the drive's internal buffer\n", tape->name, frames);
|
| 3690 |
|
|
for (i = 0; i < frames; i++) {
|
| 3691 |
|
|
stage = __idetape_kmalloc_stage(tape, 0, 0);
|
| 3692 |
|
|
if (!first)
|
| 3693 |
|
|
first = stage;
|
| 3694 |
|
|
aux = stage->aux;
|
| 3695 |
|
|
p = stage->bh->b_data;
|
| 3696 |
|
|
idetape_queue_rw_tail(drive, IDETAPE_READ_BUFFER_RQ, tape->capabilities.ctl, stage->bh);
|
| 3697 |
|
|
#if ONSTREAM_DEBUG
|
| 3698 |
|
|
if (tape->debug_level >= 2)
|
| 3699 |
|
|
printk(KERN_INFO "ide-tape: %s: read back logical block %d, data %x %x %x %x\n", tape->name, logical_blk_num, *p++, *p++, *p++, *p++);
|
| 3700 |
|
|
#endif
|
| 3701 |
|
|
rq = &stage->rq;
|
| 3702 |
|
|
ide_init_drive_cmd (rq);
|
| 3703 |
|
|
rq->cmd = IDETAPE_WRITE_RQ;
|
| 3704 |
|
|
rq->sector = tape->first_frame_position;
|
| 3705 |
|
|
rq->nr_sectors = rq->current_nr_sectors = tape->capabilities.ctl;
|
| 3706 |
|
|
idetape_init_stage(drive, stage, OS_FRAME_TYPE_DATA, logical_blk_num++);
|
| 3707 |
|
|
stage->next = NULL;
|
| 3708 |
|
|
if (last)
|
| 3709 |
|
|
last->next = stage;
|
| 3710 |
|
|
last = stage;
|
| 3711 |
|
|
}
|
| 3712 |
|
|
if (frames) {
|
| 3713 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 3714 |
|
|
last->next = tape->first_stage;
|
| 3715 |
|
|
tape->next_stage = tape->first_stage = first;
|
| 3716 |
|
|
tape->nr_stages += frames;
|
| 3717 |
|
|
tape->nr_pending_stages += frames;
|
| 3718 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3719 |
|
|
}
|
| 3720 |
|
|
idetape_update_stats(drive);
|
| 3721 |
|
|
#if ONSTREAM_DEBUG
|
| 3722 |
|
|
if (tape->debug_level >= 2)
|
| 3723 |
|
|
printk(KERN_INFO "ide-tape: %s: frames left in buffer: %d\n",
|
| 3724 |
|
|
tape->name, tape->cur_frames);
|
| 3725 |
|
|
#endif
|
| 3726 |
|
|
}
|
| 3727 |
|
|
|
| 3728 |
|
|
/*
|
| 3729 |
|
|
* Error recovery algorithm for the OnStream tape.
|
| 3730 |
|
|
*/
|
| 3731 |
|
|
static void idetape_onstream_write_error_recovery (ide_drive_t *drive)
|
| 3732 |
|
|
{
|
| 3733 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3734 |
|
|
unsigned int block;
|
| 3735 |
|
|
|
| 3736 |
|
|
if (tape->onstream_write_error == OS_WRITE_ERROR) {
|
| 3737 |
|
|
printk(KERN_ERR "ide-tape: %s: onstream_write_error_recovery: detected physical bad block at %u, logical %u first frame %u last_frame %u bufblocks %u stages %u skipping %u frames\n",
|
| 3738 |
|
|
tape->name, ntohl(tape->sense.information), tape->logical_blk_num,
|
| 3739 |
|
|
tape->first_frame_position, tape->last_frame_position,
|
| 3740 |
|
|
tape->blocks_in_buffer, tape->nr_stages,
|
| 3741 |
|
|
(ntohl(tape->sense.command_specific) >> 16) & 0xff );
|
| 3742 |
|
|
block = ntohl(tape->sense.information) + ((ntohl(tape->sense.command_specific) >> 16) & 0xff);
|
| 3743 |
|
|
idetape_update_stats(drive);
|
| 3744 |
|
|
printk(KERN_ERR "ide-tape: %s: relocating %d buffered logical blocks to physical block %u\n", tape->name, tape->cur_frames, block);
|
| 3745 |
|
|
#if 0 /* isn't once enough ??? MM */
|
| 3746 |
|
|
idetape_update_stats(drive);
|
| 3747 |
|
|
#endif
|
| 3748 |
|
|
if (tape->firmware_revision_num >= 106)
|
| 3749 |
|
|
idetape_position_tape(drive, block, 0, 1);
|
| 3750 |
|
|
else {
|
| 3751 |
|
|
idetape_onstream_read_back_buffer(drive);
|
| 3752 |
|
|
idetape_position_tape(drive, block, 0, 0);
|
| 3753 |
|
|
}
|
| 3754 |
|
|
#if 0 /* already done in idetape_position_tape MM */
|
| 3755 |
|
|
idetape_read_position(drive);
|
| 3756 |
|
|
#endif
|
| 3757 |
|
|
#if ONSTREAM_DEBUG
|
| 3758 |
|
|
if (tape->debug_level >= 1)
|
| 3759 |
|
|
printk(KERN_ERR "ide-tape: %s: positioning complete, cur_frames %d, pos %d, tape pos %d\n", tape->name, tape->cur_frames, tape->first_frame_position, tape->last_frame_position);
|
| 3760 |
|
|
#endif
|
| 3761 |
|
|
} else if (tape->onstream_write_error == OS_PART_ERROR) {
|
| 3762 |
|
|
#if ONSTREAM_DEBUG
|
| 3763 |
|
|
if (tape->debug_level >= 1)
|
| 3764 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping over config partition\n", tape->name);
|
| 3765 |
|
|
#endif
|
| 3766 |
|
|
idetape_flush_tape_buffers(drive);
|
| 3767 |
|
|
block = idetape_read_position(drive);
|
| 3768 |
|
|
if (block != OS_DATA_ENDFRAME1)
|
| 3769 |
|
|
printk(KERN_ERR "ide-tape: warning, current position %d, expected %d\n", block, OS_DATA_ENDFRAME1);
|
| 3770 |
|
|
idetape_position_tape(drive, 0xbb8, 0, 0); /* 3000 */
|
| 3771 |
|
|
}
|
| 3772 |
|
|
tape->onstream_write_error = 0;
|
| 3773 |
|
|
}
|
| 3774 |
|
|
|
| 3775 |
|
|
/*
|
| 3776 |
|
|
* idetape_insert_pipeline_into_queue is used to start servicing the
|
| 3777 |
|
|
* pipeline stages, starting from tape->next_stage.
|
| 3778 |
|
|
*/
|
| 3779 |
|
|
static void idetape_insert_pipeline_into_queue (ide_drive_t *drive)
|
| 3780 |
|
|
{
|
| 3781 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3782 |
|
|
|
| 3783 |
|
|
if (tape->next_stage == NULL)
|
| 3784 |
|
|
return;
|
| 3785 |
|
|
if (!idetape_pipeline_active(tape)) {
|
| 3786 |
|
|
if (tape->onstream_write_error)
|
| 3787 |
|
|
idetape_onstream_write_error_recovery(drive);
|
| 3788 |
|
|
set_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
|
| 3789 |
|
|
idetape_active_next_stage(drive);
|
| 3790 |
|
|
(void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
|
| 3791 |
|
|
}
|
| 3792 |
|
|
}
|
| 3793 |
|
|
|
| 3794 |
|
|
static void idetape_create_inquiry_cmd (idetape_pc_t *pc)
|
| 3795 |
|
|
{
|
| 3796 |
|
|
idetape_init_pc(pc);
|
| 3797 |
|
|
pc->c[0] = IDETAPE_INQUIRY_CMD;
|
| 3798 |
|
|
pc->c[4] = pc->request_transfer = 254;
|
| 3799 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3800 |
|
|
}
|
| 3801 |
|
|
|
| 3802 |
|
|
static void idetape_create_rewind_cmd (ide_drive_t *drive, idetape_pc_t *pc)
|
| 3803 |
|
|
{
|
| 3804 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3805 |
|
|
|
| 3806 |
|
|
idetape_init_pc(pc);
|
| 3807 |
|
|
pc->c[0] = IDETAPE_REWIND_CMD;
|
| 3808 |
|
|
if (tape->onstream)
|
| 3809 |
|
|
pc->c[1] = 1;
|
| 3810 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3811 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3812 |
|
|
}
|
| 3813 |
|
|
|
| 3814 |
|
|
static void idetape_create_mode_select_cmd (idetape_pc_t *pc, int length)
|
| 3815 |
|
|
{
|
| 3816 |
|
|
idetape_init_pc(pc);
|
| 3817 |
|
|
set_bit(PC_WRITING, &pc->flags);
|
| 3818 |
|
|
pc->c[0] = IDETAPE_MODE_SELECT_CMD;
|
| 3819 |
|
|
pc->c[1] = 0x10;
|
| 3820 |
|
|
put_unaligned(htons(length), (unsigned short *) &pc->c[3]);
|
| 3821 |
|
|
pc->request_transfer = 255;
|
| 3822 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3823 |
|
|
}
|
| 3824 |
|
|
|
| 3825 |
|
|
static void idetape_create_erase_cmd (idetape_pc_t *pc)
|
| 3826 |
|
|
{
|
| 3827 |
|
|
idetape_init_pc(pc);
|
| 3828 |
|
|
pc->c[0] = IDETAPE_ERASE_CMD;
|
| 3829 |
|
|
pc->c[1] = 1;
|
| 3830 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3831 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3832 |
|
|
}
|
| 3833 |
|
|
|
| 3834 |
|
|
static void idetape_create_space_cmd (idetape_pc_t *pc,int count,u8 cmd)
|
| 3835 |
|
|
{
|
| 3836 |
|
|
idetape_init_pc(pc);
|
| 3837 |
|
|
pc->c[0] = IDETAPE_SPACE_CMD;
|
| 3838 |
|
|
put_unaligned(htonl (count), (unsigned int *) &pc->c[1]);
|
| 3839 |
|
|
pc->c[1] = cmd;
|
| 3840 |
|
|
set_bit(PC_WAIT_FOR_DSC, &pc->flags);
|
| 3841 |
|
|
pc->callback = &idetape_pc_callback;
|
| 3842 |
|
|
}
|
| 3843 |
|
|
|
| 3844 |
|
|
/*
|
| 3845 |
|
|
* Verify that we have the correct tape frame
|
| 3846 |
|
|
*/
|
| 3847 |
|
|
static int idetape_verify_stage (ide_drive_t *drive, idetape_stage_t *stage, int logical_blk_num, int quiet)
|
| 3848 |
|
|
{
|
| 3849 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3850 |
|
|
os_aux_t *aux = stage->aux;
|
| 3851 |
|
|
os_partition_t *par = &aux->partition;
|
| 3852 |
|
|
struct request *rq = &stage->rq;
|
| 3853 |
|
|
struct buffer_head *bh;
|
| 3854 |
|
|
|
| 3855 |
|
|
if (!tape->onstream)
|
| 3856 |
|
|
return 1;
|
| 3857 |
|
|
if (tape->raw) {
|
| 3858 |
|
|
if (rq->errors) {
|
| 3859 |
|
|
bh = stage->bh;
|
| 3860 |
|
|
while (bh) {
|
| 3861 |
|
|
memset(bh->b_data, 0, bh->b_size);
|
| 3862 |
|
|
bh = bh->b_reqnext;
|
| 3863 |
|
|
}
|
| 3864 |
|
|
strcpy(stage->bh->b_data, "READ ERROR ON FRAME");
|
| 3865 |
|
|
}
|
| 3866 |
|
|
return 1;
|
| 3867 |
|
|
}
|
| 3868 |
|
|
if (rq->errors == IDETAPE_ERROR_GENERAL) {
|
| 3869 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3870 |
|
|
"read error\n", tape->name, tape->first_frame_position);
|
| 3871 |
|
|
return 0;
|
| 3872 |
|
|
}
|
| 3873 |
|
|
if (rq->errors == IDETAPE_ERROR_EOD) {
|
| 3874 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, eod\n",
|
| 3875 |
|
|
tape->name, tape->first_frame_position);
|
| 3876 |
|
|
return 0;
|
| 3877 |
|
|
}
|
| 3878 |
|
|
if (ntohl(aux->format_id) != 0) {
|
| 3879 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3880 |
|
|
"format_id %u\n", tape->name,
|
| 3881 |
|
|
tape->first_frame_position, ntohl(aux->format_id));
|
| 3882 |
|
|
return 0;
|
| 3883 |
|
|
}
|
| 3884 |
|
|
if (memcmp(aux->application_sig, tape->application_sig, 4) != 0) {
|
| 3885 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3886 |
|
|
"incorrect application signature\n",
|
| 3887 |
|
|
tape->name, tape->first_frame_position);
|
| 3888 |
|
|
return 0;
|
| 3889 |
|
|
}
|
| 3890 |
|
|
if (aux->frame_type != OS_FRAME_TYPE_DATA &&
|
| 3891 |
|
|
aux->frame_type != OS_FRAME_TYPE_EOD &&
|
| 3892 |
|
|
aux->frame_type != OS_FRAME_TYPE_MARKER) {
|
| 3893 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, frame "
|
| 3894 |
|
|
"type %x\n", tape->name,
|
| 3895 |
|
|
tape->first_frame_position, aux->frame_type);
|
| 3896 |
|
|
return 0;
|
| 3897 |
|
|
}
|
| 3898 |
|
|
if (par->partition_num != OS_DATA_PARTITION) {
|
| 3899 |
|
|
if (!tape->linux_media || tape->linux_media_version != 2) {
|
| 3900 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3901 |
|
|
"partition num %d\n", tape->name,
|
| 3902 |
|
|
tape->first_frame_position, par->partition_num);
|
| 3903 |
|
|
return 0;
|
| 3904 |
|
|
}
|
| 3905 |
|
|
}
|
| 3906 |
|
|
if (par->par_desc_ver != OS_PARTITION_VERSION) {
|
| 3907 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3908 |
|
|
"partition version %d\n", tape->name,
|
| 3909 |
|
|
tape->first_frame_position, par->par_desc_ver);
|
| 3910 |
|
|
return 0;
|
| 3911 |
|
|
}
|
| 3912 |
|
|
if (ntohs(par->wrt_pass_cntr) != tape->wrt_pass_cntr) {
|
| 3913 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3914 |
|
|
"wrt_pass_cntr %d (expected %d)(logical_blk_num %u)\n",
|
| 3915 |
|
|
tape->name, tape->first_frame_position,
|
| 3916 |
|
|
ntohs(par->wrt_pass_cntr), tape->wrt_pass_cntr,
|
| 3917 |
|
|
ntohl(aux->logical_blk_num));
|
| 3918 |
|
|
return 0;
|
| 3919 |
|
|
}
|
| 3920 |
|
|
if (aux->frame_seq_num != aux->logical_blk_num) {
|
| 3921 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3922 |
|
|
"seq != logical\n", tape->name,
|
| 3923 |
|
|
tape->first_frame_position);
|
| 3924 |
|
|
return 0;
|
| 3925 |
|
|
}
|
| 3926 |
|
|
if (logical_blk_num != -1 &&
|
| 3927 |
|
|
ntohl(aux->logical_blk_num) != logical_blk_num) {
|
| 3928 |
|
|
if (!quiet)
|
| 3929 |
|
|
printk(KERN_INFO "ide-tape: %s: skipping frame %d, "
|
| 3930 |
|
|
"logical_blk_num %u (expected %d)\n",
|
| 3931 |
|
|
tape->name, tape->first_frame_position,
|
| 3932 |
|
|
ntohl(aux->logical_blk_num), logical_blk_num);
|
| 3933 |
|
|
return 0;
|
| 3934 |
|
|
}
|
| 3935 |
|
|
if (aux->frame_type == OS_FRAME_TYPE_MARKER) {
|
| 3936 |
|
|
rq->errors = IDETAPE_ERROR_FILEMARK;
|
| 3937 |
|
|
rq->current_nr_sectors = rq->nr_sectors;
|
| 3938 |
|
|
}
|
| 3939 |
|
|
return 1;
|
| 3940 |
|
|
}
|
| 3941 |
|
|
|
| 3942 |
|
|
static void idetape_wait_first_stage (ide_drive_t *drive)
|
| 3943 |
|
|
{
|
| 3944 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3945 |
|
|
unsigned long flags;
|
| 3946 |
|
|
|
| 3947 |
|
|
if (tape->first_stage == NULL)
|
| 3948 |
|
|
return;
|
| 3949 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 3950 |
|
|
if (tape->active_stage == tape->first_stage)
|
| 3951 |
|
|
idetape_wait_for_request(drive, tape->active_data_request);
|
| 3952 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3953 |
|
|
}
|
| 3954 |
|
|
|
| 3955 |
|
|
/*
|
| 3956 |
|
|
* idetape_add_chrdev_write_request tries to add a character device
|
| 3957 |
|
|
* originated write request to our pipeline. In case we don't succeed,
|
| 3958 |
|
|
* we revert to non-pipelined operation mode for this request.
|
| 3959 |
|
|
*
|
| 3960 |
|
|
* 1. Try to allocate a new pipeline stage.
|
| 3961 |
|
|
* 2. If we can't, wait for more and more requests to be serviced
|
| 3962 |
|
|
* and try again each time.
|
| 3963 |
|
|
* 3. If we still can't allocate a stage, fallback to
|
| 3964 |
|
|
* non-pipelined operation mode for this request.
|
| 3965 |
|
|
*/
|
| 3966 |
|
|
static int idetape_add_chrdev_write_request (ide_drive_t *drive, int blocks)
|
| 3967 |
|
|
{
|
| 3968 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 3969 |
|
|
idetape_stage_t *new_stage;
|
| 3970 |
|
|
unsigned long flags;
|
| 3971 |
|
|
struct request *rq;
|
| 3972 |
|
|
|
| 3973 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 3974 |
|
|
if (tape->debug_level >= 3)
|
| 3975 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 3976 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 3977 |
|
|
|
| 3978 |
|
|
/*
|
| 3979 |
|
|
* Attempt to allocate a new stage.
|
| 3980 |
|
|
* Pay special attention to possible race conditions.
|
| 3981 |
|
|
*/
|
| 3982 |
|
|
while ((new_stage = idetape_kmalloc_stage (tape)) == NULL) {
|
| 3983 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 3984 |
|
|
if (idetape_pipeline_active(tape)) {
|
| 3985 |
|
|
idetape_wait_for_request(drive, tape->active_data_request);
|
| 3986 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3987 |
|
|
} else {
|
| 3988 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 3989 |
|
|
idetape_insert_pipeline_into_queue(drive);
|
| 3990 |
|
|
if (idetape_pipeline_active(tape))
|
| 3991 |
|
|
continue;
|
| 3992 |
|
|
/*
|
| 3993 |
|
|
* Linux is short on memory. Fallback to
|
| 3994 |
|
|
* non-pipelined operation mode for this request.
|
| 3995 |
|
|
*/
|
| 3996 |
|
|
return idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, blocks, tape->merge_stage->bh);
|
| 3997 |
|
|
}
|
| 3998 |
|
|
}
|
| 3999 |
|
|
rq = &new_stage->rq;
|
| 4000 |
|
|
ide_init_drive_cmd(rq);
|
| 4001 |
|
|
rq->cmd = IDETAPE_WRITE_RQ;
|
| 4002 |
|
|
/* Doesn't actually matter - We always assume sequential access */
|
| 4003 |
|
|
rq->sector = tape->first_frame_position;
|
| 4004 |
|
|
rq->nr_sectors = rq->current_nr_sectors = blocks;
|
| 4005 |
|
|
|
| 4006 |
|
|
idetape_switch_buffers (tape, new_stage);
|
| 4007 |
|
|
idetape_init_stage(drive, new_stage, OS_FRAME_TYPE_DATA, tape->logical_blk_num);
|
| 4008 |
|
|
tape->logical_blk_num++;
|
| 4009 |
|
|
idetape_add_stage_tail(drive, new_stage);
|
| 4010 |
|
|
tape->pipeline_head++;
|
| 4011 |
|
|
#if USE_IOTRACE
|
| 4012 |
|
|
IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
|
| 4013 |
|
|
#endif
|
| 4014 |
|
|
calculate_speeds(drive);
|
| 4015 |
|
|
|
| 4016 |
|
|
/*
|
| 4017 |
|
|
* Estimate whether the tape has stopped writing by checking
|
| 4018 |
|
|
* if our write pipeline is currently empty. If we are not
|
| 4019 |
|
|
* writing anymore, wait for the pipeline to be full enough
|
| 4020 |
|
|
* (90%) before starting to service requests, so that we will
|
| 4021 |
|
|
* be able to keep up with the higher speeds of the tape.
|
| 4022 |
|
|
*
|
| 4023 |
|
|
* For the OnStream drive, we can query the number of pending
|
| 4024 |
|
|
* frames in the drive's internal buffer. As long as the tape
|
| 4025 |
|
|
* is still writing, it is better to write frames immediately
|
| 4026 |
|
|
* rather than gather them in the pipeline. This will give the
|
| 4027 |
|
|
* tape's firmware the ability to sense the current incoming
|
| 4028 |
|
|
* data rate more accurately, and since the OnStream tape
|
| 4029 |
|
|
* supports variable speeds, it can try to adjust itself to the
|
| 4030 |
|
|
* incoming data rate.
|
| 4031 |
|
|
*/
|
| 4032 |
|
|
if (!idetape_pipeline_active(tape)) {
|
| 4033 |
|
|
if (tape->nr_stages >= tape->max_stages * 9 / 10 ||
|
| 4034 |
|
|
tape->nr_stages >= tape->max_stages - tape->uncontrolled_pipeline_head_speed * 3 * 1024 / tape->tape_block_size) {
|
| 4035 |
|
|
tape->measure_insert_time = 1;
|
| 4036 |
|
|
tape->insert_time = jiffies;
|
| 4037 |
|
|
tape->insert_size = 0;
|
| 4038 |
|
|
tape->insert_speed = 0;
|
| 4039 |
|
|
idetape_insert_pipeline_into_queue (drive);
|
| 4040 |
|
|
} else if (tape->onstream) {
|
| 4041 |
|
|
idetape_update_stats(drive);
|
| 4042 |
|
|
if (tape->cur_frames > 5)
|
| 4043 |
|
|
idetape_insert_pipeline_into_queue(drive);
|
| 4044 |
|
|
}
|
| 4045 |
|
|
}
|
| 4046 |
|
|
if (test_and_clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
|
| 4047 |
|
|
/* Return a deferred error */
|
| 4048 |
|
|
return -EIO;
|
| 4049 |
|
|
return blocks;
|
| 4050 |
|
|
}
|
| 4051 |
|
|
|
| 4052 |
|
|
/*
|
| 4053 |
|
|
* idetape_wait_for_pipeline will wait until all pending pipeline
|
| 4054 |
|
|
* requests are serviced. Typically called on device close.
|
| 4055 |
|
|
*/
|
| 4056 |
|
|
static void idetape_wait_for_pipeline (ide_drive_t *drive)
|
| 4057 |
|
|
{
|
| 4058 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4059 |
|
|
unsigned long flags;
|
| 4060 |
|
|
|
| 4061 |
|
|
while (tape->next_stage || idetape_pipeline_active(tape)) {
|
| 4062 |
|
|
idetape_insert_pipeline_into_queue(drive);
|
| 4063 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4064 |
|
|
if (idetape_pipeline_active(tape))
|
| 4065 |
|
|
idetape_wait_for_request(drive, tape->active_data_request);
|
| 4066 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4067 |
|
|
}
|
| 4068 |
|
|
}
|
| 4069 |
|
|
|
| 4070 |
|
|
static void idetape_empty_write_pipeline (ide_drive_t *drive)
|
| 4071 |
|
|
{
|
| 4072 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4073 |
|
|
int blocks, i, min;
|
| 4074 |
|
|
struct buffer_head *bh;
|
| 4075 |
|
|
|
| 4076 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 4077 |
|
|
if (tape->chrdev_direction != idetape_direction_write) {
|
| 4078 |
|
|
printk(KERN_ERR "ide-tape: bug: Trying to empty write "
|
| 4079 |
|
|
"pipeline, but we are not writing.\n");
|
| 4080 |
|
|
return;
|
| 4081 |
|
|
}
|
| 4082 |
|
|
if (tape->merge_stage_size > tape->stage_size) {
|
| 4083 |
|
|
printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
|
| 4084 |
|
|
tape->merge_stage_size = tape->stage_size;
|
| 4085 |
|
|
}
|
| 4086 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 4087 |
|
|
if (tape->merge_stage_size) {
|
| 4088 |
|
|
blocks = tape->merge_stage_size / tape->tape_block_size;
|
| 4089 |
|
|
if (tape->merge_stage_size % tape->tape_block_size) {
|
| 4090 |
|
|
blocks++;
|
| 4091 |
|
|
i = tape->tape_block_size - tape->merge_stage_size % tape->tape_block_size;
|
| 4092 |
|
|
bh = tape->bh->b_reqnext;
|
| 4093 |
|
|
while (bh) {
|
| 4094 |
|
|
atomic_set(&bh->b_count, 0);
|
| 4095 |
|
|
bh = bh->b_reqnext;
|
| 4096 |
|
|
}
|
| 4097 |
|
|
bh = tape->bh;
|
| 4098 |
|
|
while (i) {
|
| 4099 |
|
|
if (bh == NULL) {
|
| 4100 |
|
|
printk(KERN_INFO "ide-tape: bug, bh NULL\n");
|
| 4101 |
|
|
break;
|
| 4102 |
|
|
}
|
| 4103 |
|
|
min = IDE_MIN(i, bh->b_size - atomic_read(&bh->b_count));
|
| 4104 |
|
|
memset(bh->b_data + atomic_read(&bh->b_count), 0, min);
|
| 4105 |
|
|
atomic_add(min, &bh->b_count);
|
| 4106 |
|
|
i -= min;
|
| 4107 |
|
|
bh = bh->b_reqnext;
|
| 4108 |
|
|
}
|
| 4109 |
|
|
}
|
| 4110 |
|
|
(void) idetape_add_chrdev_write_request(drive, blocks);
|
| 4111 |
|
|
tape->merge_stage_size = 0;
|
| 4112 |
|
|
}
|
| 4113 |
|
|
idetape_wait_for_pipeline(drive);
|
| 4114 |
|
|
if (tape->merge_stage != NULL) {
|
| 4115 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 4116 |
|
|
tape->merge_stage = NULL;
|
| 4117 |
|
|
}
|
| 4118 |
|
|
clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 4119 |
|
|
tape->chrdev_direction = idetape_direction_none;
|
| 4120 |
|
|
|
| 4121 |
|
|
/*
|
| 4122 |
|
|
* On the next backup, perform the feedback loop again.
|
| 4123 |
|
|
* (I don't want to keep sense information between backups,
|
| 4124 |
|
|
* as some systems are constantly on, and the system load
|
| 4125 |
|
|
* can be totally different on the next backup).
|
| 4126 |
|
|
*/
|
| 4127 |
|
|
tape->max_stages = tape->min_pipeline;
|
| 4128 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 4129 |
|
|
if (tape->first_stage != NULL ||
|
| 4130 |
|
|
tape->next_stage != NULL ||
|
| 4131 |
|
|
tape->last_stage != NULL ||
|
| 4132 |
|
|
tape->nr_stages != 0) {
|
| 4133 |
|
|
printk(KERN_ERR "ide-tape: ide-tape pipeline bug, "
|
| 4134 |
|
|
"first_stage %p, next_stage %p, last_stage %p, "
|
| 4135 |
|
|
"nr_stages %d\n", tape->first_stage,
|
| 4136 |
|
|
tape->next_stage, tape->last_stage, tape->nr_stages);
|
| 4137 |
|
|
}
|
| 4138 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 4139 |
|
|
}
|
| 4140 |
|
|
|
| 4141 |
|
|
static void idetape_restart_speed_control (ide_drive_t *drive)
|
| 4142 |
|
|
{
|
| 4143 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4144 |
|
|
|
| 4145 |
|
|
tape->restart_speed_control_req = 0;
|
| 4146 |
|
|
tape->pipeline_head = 0;
|
| 4147 |
|
|
tape->buffer_head = tape->tape_head = tape->cur_frames;
|
| 4148 |
|
|
tape->controlled_last_pipeline_head = tape->uncontrolled_last_pipeline_head = 0;
|
| 4149 |
|
|
tape->controlled_previous_pipeline_head = tape->uncontrolled_previous_pipeline_head = 0;
|
| 4150 |
|
|
tape->pipeline_head_speed = tape->controlled_pipeline_head_speed = 5000;
|
| 4151 |
|
|
tape->uncontrolled_pipeline_head_speed = 0;
|
| 4152 |
|
|
tape->controlled_pipeline_head_time = tape->uncontrolled_pipeline_head_time = jiffies;
|
| 4153 |
|
|
tape->controlled_previous_head_time = tape->uncontrolled_previous_head_time = jiffies;
|
| 4154 |
|
|
}
|
| 4155 |
|
|
|
| 4156 |
|
|
static int idetape_initiate_read (ide_drive_t *drive, int max_stages)
|
| 4157 |
|
|
{
|
| 4158 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4159 |
|
|
idetape_stage_t *new_stage;
|
| 4160 |
|
|
struct request rq;
|
| 4161 |
|
|
int bytes_read;
|
| 4162 |
|
|
int blocks = tape->capabilities.ctl;
|
| 4163 |
|
|
|
| 4164 |
|
|
/* Initialize read operation */
|
| 4165 |
|
|
if (tape->chrdev_direction != idetape_direction_read) {
|
| 4166 |
|
|
if (tape->chrdev_direction == idetape_direction_write) {
|
| 4167 |
|
|
idetape_empty_write_pipeline(drive);
|
| 4168 |
|
|
idetape_flush_tape_buffers(drive);
|
| 4169 |
|
|
}
|
| 4170 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 4171 |
|
|
if (tape->merge_stage || tape->merge_stage_size) {
|
| 4172 |
|
|
printk(KERN_ERR "ide-tape: merge_stage_size "
|
| 4173 |
|
|
"should be 0 now\n");
|
| 4174 |
|
|
tape->merge_stage_size = 0;
|
| 4175 |
|
|
}
|
| 4176 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 4177 |
|
|
if ((tape->merge_stage = __idetape_kmalloc_stage (tape, 0, 0)) == NULL)
|
| 4178 |
|
|
return -ENOMEM;
|
| 4179 |
|
|
tape->chrdev_direction = idetape_direction_read;
|
| 4180 |
|
|
tape->logical_blk_num = 0;
|
| 4181 |
|
|
|
| 4182 |
|
|
/*
|
| 4183 |
|
|
* Issue a read 0 command to ensure that DSC handshake
|
| 4184 |
|
|
* is switched from completion mode to buffer available
|
| 4185 |
|
|
* mode.
|
| 4186 |
|
|
*/
|
| 4187 |
|
|
bytes_read = idetape_queue_rw_tail(drive, IDETAPE_READ_RQ, 0, tape->merge_stage->bh);
|
| 4188 |
|
|
if (bytes_read < 0) {
|
| 4189 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 4190 |
|
|
tape->merge_stage = NULL;
|
| 4191 |
|
|
tape->chrdev_direction = idetape_direction_none;
|
| 4192 |
|
|
return bytes_read;
|
| 4193 |
|
|
}
|
| 4194 |
|
|
}
|
| 4195 |
|
|
if (tape->restart_speed_control_req)
|
| 4196 |
|
|
idetape_restart_speed_control(drive);
|
| 4197 |
|
|
ide_init_drive_cmd(&rq);
|
| 4198 |
|
|
rq.cmd = IDETAPE_READ_RQ;
|
| 4199 |
|
|
rq.sector = tape->first_frame_position;
|
| 4200 |
|
|
rq.nr_sectors = rq.current_nr_sectors = blocks;
|
| 4201 |
|
|
if (!test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags) &&
|
| 4202 |
|
|
tape->nr_stages < max_stages) {
|
| 4203 |
|
|
new_stage = idetape_kmalloc_stage(tape);
|
| 4204 |
|
|
while (new_stage != NULL) {
|
| 4205 |
|
|
new_stage->rq = rq;
|
| 4206 |
|
|
idetape_add_stage_tail(drive, new_stage);
|
| 4207 |
|
|
if (tape->nr_stages >= max_stages)
|
| 4208 |
|
|
break;
|
| 4209 |
|
|
new_stage = idetape_kmalloc_stage(tape);
|
| 4210 |
|
|
}
|
| 4211 |
|
|
}
|
| 4212 |
|
|
if (!idetape_pipeline_active(tape)) {
|
| 4213 |
|
|
if (tape->nr_pending_stages >= 3 * max_stages / 4) {
|
| 4214 |
|
|
tape->measure_insert_time = 1;
|
| 4215 |
|
|
tape->insert_time = jiffies;
|
| 4216 |
|
|
tape->insert_size = 0;
|
| 4217 |
|
|
tape->insert_speed = 0;
|
| 4218 |
|
|
idetape_insert_pipeline_into_queue(drive);
|
| 4219 |
|
|
} else if (tape->onstream) {
|
| 4220 |
|
|
idetape_update_stats(drive);
|
| 4221 |
|
|
if (tape->cur_frames < tape->max_frames - 5)
|
| 4222 |
|
|
idetape_insert_pipeline_into_queue(drive);
|
| 4223 |
|
|
}
|
| 4224 |
|
|
}
|
| 4225 |
|
|
return 0;
|
| 4226 |
|
|
}
|
| 4227 |
|
|
|
| 4228 |
|
|
static int idetape_get_logical_blk (ide_drive_t *drive, int logical_blk_num, int max_stages, int quiet)
|
| 4229 |
|
|
{
|
| 4230 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4231 |
|
|
unsigned long flags;
|
| 4232 |
|
|
int cnt = 0, x, position;
|
| 4233 |
|
|
|
| 4234 |
|
|
/*
|
| 4235 |
|
|
* Search and wait for the next logical tape block
|
| 4236 |
|
|
*/
|
| 4237 |
|
|
while (1) {
|
| 4238 |
|
|
if (cnt++ > 1000) { /* AJN: was 100 */
|
| 4239 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't find "
|
| 4240 |
|
|
"logical block %d, aborting\n",
|
| 4241 |
|
|
tape->name, logical_blk_num);
|
| 4242 |
|
|
return 0;
|
| 4243 |
|
|
}
|
| 4244 |
|
|
idetape_initiate_read(drive, max_stages);
|
| 4245 |
|
|
if (tape->first_stage == NULL) {
|
| 4246 |
|
|
if (tape->onstream) {
|
| 4247 |
|
|
#if ONSTREAM_DEBUG
|
| 4248 |
|
|
if (tape->debug_level >= 1)
|
| 4249 |
|
|
printk(KERN_INFO "ide-tape: %s: first_stage == NULL, pipeline error %ld\n", tape->name, (long)test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags));
|
| 4250 |
|
|
#endif
|
| 4251 |
|
|
clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 4252 |
|
|
position = idetape_read_position(drive);
|
| 4253 |
|
|
printk(KERN_INFO "ide-tape: %s: blank block "
|
| 4254 |
|
|
"detected at %d\n", tape->name,
|
| 4255 |
|
|
position);
|
| 4256 |
|
|
if (position >= 3000 && position < 3080)
|
| 4257 |
|
|
/* Why is this check and number ??? MM */
|
| 4258 |
|
|
position += 32;
|
| 4259 |
|
|
if (position >= OS_DATA_ENDFRAME1 &&
|
| 4260 |
|
|
position < 3000)
|
| 4261 |
|
|
position = 3000;
|
| 4262 |
|
|
else
|
| 4263 |
|
|
/*
|
| 4264 |
|
|
* compensate for write errors that
|
| 4265 |
|
|
* generally skip 80 frames, expect
|
| 4266 |
|
|
* around 20 read errors in a row...
|
| 4267 |
|
|
*/
|
| 4268 |
|
|
position += 60;
|
| 4269 |
|
|
if (position >= OS_DATA_ENDFRAME1 &&
|
| 4270 |
|
|
position < 3000)
|
| 4271 |
|
|
position = 3000;
|
| 4272 |
|
|
printk(KERN_INFO "ide-tape: %s: positioning tape to block %d\n", tape->name, position);
|
| 4273 |
|
|
|
| 4274 |
|
|
/* seems to be needed to correctly position
|
| 4275 |
|
|
* at block 3000 MM
|
| 4276 |
|
|
*/
|
| 4277 |
|
|
if (position == 3000)
|
| 4278 |
|
|
idetape_position_tape(drive, 0, 0, 0);
|
| 4279 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 4280 |
|
|
cnt += 40;
|
| 4281 |
|
|
continue;
|
| 4282 |
|
|
} else
|
| 4283 |
|
|
return 0;
|
| 4284 |
|
|
}
|
| 4285 |
|
|
idetape_wait_first_stage(drive);
|
| 4286 |
|
|
if (idetape_verify_stage(drive, tape->first_stage, logical_blk_num, quiet))
|
| 4287 |
|
|
break;
|
| 4288 |
|
|
if (tape->first_stage->rq.errors == IDETAPE_ERROR_EOD)
|
| 4289 |
|
|
cnt--;
|
| 4290 |
|
|
if (idetape_verify_stage(drive, tape->first_stage, -1, quiet)) {
|
| 4291 |
|
|
x = ntohl(tape->first_stage->aux->logical_blk_num);
|
| 4292 |
|
|
if (x > logical_blk_num) {
|
| 4293 |
|
|
printk(KERN_ERR "ide-tape: %s: couldn't find logical block %d, aborting (block %d found)\n", tape->name, logical_blk_num, x);
|
| 4294 |
|
|
return 0;
|
| 4295 |
|
|
}
|
| 4296 |
|
|
}
|
| 4297 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4298 |
|
|
idetape_remove_stage_head(drive);
|
| 4299 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4300 |
|
|
}
|
| 4301 |
|
|
if (tape->onstream)
|
| 4302 |
|
|
tape->logical_blk_num = ntohl(tape->first_stage->aux->logical_blk_num);
|
| 4303 |
|
|
return 1;
|
| 4304 |
|
|
}
|
| 4305 |
|
|
|
| 4306 |
|
|
/*
|
| 4307 |
|
|
* idetape_add_chrdev_read_request is called from idetape_chrdev_read
|
| 4308 |
|
|
* to service a character device read request and add read-ahead
|
| 4309 |
|
|
* requests to our pipeline.
|
| 4310 |
|
|
*/
|
| 4311 |
|
|
static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
|
| 4312 |
|
|
{
|
| 4313 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4314 |
|
|
unsigned long flags;
|
| 4315 |
|
|
struct request *rq_ptr;
|
| 4316 |
|
|
int bytes_read;
|
| 4317 |
|
|
|
| 4318 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 4319 |
|
|
if (tape->debug_level >= 4)
|
| 4320 |
|
|
printk(KERN_INFO "ide-tape: Reached %s, %d blocks\n",
|
| 4321 |
|
|
__FUNCTION__, blocks);
|
| 4322 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 4323 |
|
|
|
| 4324 |
|
|
/*
|
| 4325 |
|
|
* If we are at a filemark, return a read length of 0
|
| 4326 |
|
|
*/
|
| 4327 |
|
|
if (test_bit(IDETAPE_FILEMARK, &tape->flags))
|
| 4328 |
|
|
return 0;
|
| 4329 |
|
|
|
| 4330 |
|
|
/*
|
| 4331 |
|
|
* Wait for the next logical block to be available at the head
|
| 4332 |
|
|
* of the pipeline
|
| 4333 |
|
|
*/
|
| 4334 |
|
|
if (!idetape_get_logical_blk(drive, tape->logical_blk_num, tape->max_stages, 0)) {
|
| 4335 |
|
|
if (tape->onstream) {
|
| 4336 |
|
|
set_bit(IDETAPE_READ_ERROR, &tape->flags);
|
| 4337 |
|
|
return 0;
|
| 4338 |
|
|
}
|
| 4339 |
|
|
if (test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
|
| 4340 |
|
|
return 0;
|
| 4341 |
|
|
return idetape_queue_rw_tail(drive, IDETAPE_READ_RQ, blocks, tape->merge_stage->bh);
|
| 4342 |
|
|
}
|
| 4343 |
|
|
rq_ptr = &tape->first_stage->rq;
|
| 4344 |
|
|
bytes_read = tape->tape_block_size * (rq_ptr->nr_sectors - rq_ptr->current_nr_sectors);
|
| 4345 |
|
|
rq_ptr->nr_sectors = rq_ptr->current_nr_sectors = 0;
|
| 4346 |
|
|
|
| 4347 |
|
|
|
| 4348 |
|
|
if (tape->onstream && !tape->raw &&
|
| 4349 |
|
|
tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
|
| 4350 |
|
|
#if ONSTREAM_DEBUG
|
| 4351 |
|
|
if (tape->debug_level >= 2)
|
| 4352 |
|
|
printk(KERN_INFO "ide-tape: %s: EOD reached\n",
|
| 4353 |
|
|
tape->name);
|
| 4354 |
|
|
#endif
|
| 4355 |
|
|
return 0;
|
| 4356 |
|
|
}
|
| 4357 |
|
|
if (rq_ptr->errors == IDETAPE_ERROR_EOD)
|
| 4358 |
|
|
return 0;
|
| 4359 |
|
|
else {
|
| 4360 |
|
|
idetape_switch_buffers(tape, tape->first_stage);
|
| 4361 |
|
|
if (rq_ptr->errors == IDETAPE_ERROR_GENERAL) {
|
| 4362 |
|
|
#if ONSTREAM_DEBUG
|
| 4363 |
|
|
if (tape->debug_level >= 1)
|
| 4364 |
|
|
printk(KERN_INFO "ide-tape: error detected, "
|
| 4365 |
|
|
"bytes_read %d\n", bytes_read);
|
| 4366 |
|
|
#endif
|
| 4367 |
|
|
}
|
| 4368 |
|
|
if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
|
| 4369 |
|
|
set_bit(IDETAPE_FILEMARK, &tape->flags);
|
| 4370 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4371 |
|
|
idetape_remove_stage_head (drive);
|
| 4372 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4373 |
|
|
tape->logical_blk_num++;
|
| 4374 |
|
|
tape->pipeline_head++;
|
| 4375 |
|
|
#if USE_IOTRACE
|
| 4376 |
|
|
IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
|
| 4377 |
|
|
#endif
|
| 4378 |
|
|
calculate_speeds(drive);
|
| 4379 |
|
|
}
|
| 4380 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 4381 |
|
|
if (bytes_read > blocks * tape->tape_block_size) {
|
| 4382 |
|
|
printk(KERN_ERR "ide-tape: bug: trying to return more "
|
| 4383 |
|
|
"bytes than requested\n");
|
| 4384 |
|
|
bytes_read = blocks * tape->tape_block_size;
|
| 4385 |
|
|
}
|
| 4386 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 4387 |
|
|
return (bytes_read);
|
| 4388 |
|
|
}
|
| 4389 |
|
|
|
| 4390 |
|
|
static void idetape_pad_zeros (ide_drive_t *drive, int bcount)
|
| 4391 |
|
|
{
|
| 4392 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4393 |
|
|
struct buffer_head *bh;
|
| 4394 |
|
|
int count, blocks;
|
| 4395 |
|
|
|
| 4396 |
|
|
while (bcount) {
|
| 4397 |
|
|
bh = tape->merge_stage->bh;
|
| 4398 |
|
|
count = IDE_MIN(tape->stage_size, bcount);
|
| 4399 |
|
|
bcount -= count;
|
| 4400 |
|
|
blocks = count / tape->tape_block_size;
|
| 4401 |
|
|
while (count) {
|
| 4402 |
|
|
atomic_set(&bh->b_count, IDE_MIN (count, bh->b_size));
|
| 4403 |
|
|
memset(bh->b_data, 0, atomic_read(&bh->b_count));
|
| 4404 |
|
|
count -= atomic_read(&bh->b_count);
|
| 4405 |
|
|
bh = bh->b_reqnext;
|
| 4406 |
|
|
}
|
| 4407 |
|
|
idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, blocks, tape->merge_stage->bh);
|
| 4408 |
|
|
}
|
| 4409 |
|
|
}
|
| 4410 |
|
|
|
| 4411 |
|
|
static int idetape_pipeline_size (ide_drive_t *drive)
|
| 4412 |
|
|
{
|
| 4413 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4414 |
|
|
idetape_stage_t *stage;
|
| 4415 |
|
|
struct request *rq;
|
| 4416 |
|
|
int size = 0;
|
| 4417 |
|
|
|
| 4418 |
|
|
idetape_wait_for_pipeline(drive);
|
| 4419 |
|
|
stage = tape->first_stage;
|
| 4420 |
|
|
while (stage != NULL) {
|
| 4421 |
|
|
rq = &stage->rq;
|
| 4422 |
|
|
size += tape->tape_block_size * (rq->nr_sectors-rq->current_nr_sectors);
|
| 4423 |
|
|
if (rq->errors == IDETAPE_ERROR_FILEMARK)
|
| 4424 |
|
|
size += tape->tape_block_size;
|
| 4425 |
|
|
stage = stage->next;
|
| 4426 |
|
|
}
|
| 4427 |
|
|
size += tape->merge_stage_size;
|
| 4428 |
|
|
return size;
|
| 4429 |
|
|
}
|
| 4430 |
|
|
|
| 4431 |
|
|
/*
|
| 4432 |
|
|
* Rewinds the tape to the Beginning Of the current Partition (BOP).
|
| 4433 |
|
|
*
|
| 4434 |
|
|
* We currently support only one partition.
|
| 4435 |
|
|
*/
|
| 4436 |
|
|
static int idetape_rewind_tape (ide_drive_t *drive)
|
| 4437 |
|
|
{
|
| 4438 |
|
|
int retval;
|
| 4439 |
|
|
idetape_pc_t pc;
|
| 4440 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4441 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 4442 |
|
|
if (tape->debug_level >= 2)
|
| 4443 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 4444 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 4445 |
|
|
|
| 4446 |
|
|
idetape_create_rewind_cmd(drive, &pc);
|
| 4447 |
|
|
retval = idetape_queue_pc_tail(drive, &pc);
|
| 4448 |
|
|
if (retval)
|
| 4449 |
|
|
return retval;
|
| 4450 |
|
|
|
| 4451 |
|
|
idetape_create_read_position_cmd(&pc);
|
| 4452 |
|
|
retval = idetape_queue_pc_tail(drive, &pc);
|
| 4453 |
|
|
if (retval)
|
| 4454 |
|
|
return retval;
|
| 4455 |
|
|
tape->logical_blk_num = 0;
|
| 4456 |
|
|
return 0;
|
| 4457 |
|
|
}
|
| 4458 |
|
|
|
| 4459 |
|
|
/*
|
| 4460 |
|
|
* Our special ide-tape ioctl's.
|
| 4461 |
|
|
*
|
| 4462 |
|
|
* Currently there aren't any ioctl's.
|
| 4463 |
|
|
* mtio.h compatible commands should be issued to the character device
|
| 4464 |
|
|
* interface.
|
| 4465 |
|
|
*/
|
| 4466 |
|
|
static int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
|
| 4467 |
|
|
unsigned int cmd, unsigned long arg)
|
| 4468 |
|
|
{
|
| 4469 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4470 |
|
|
idetape_config_t config;
|
| 4471 |
|
|
|
| 4472 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 4473 |
|
|
if (tape->debug_level >= 4)
|
| 4474 |
|
|
printk(KERN_INFO "ide-tape: Reached %s\n", __FUNCTION__);
|
| 4475 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 4476 |
|
|
switch (cmd) {
|
| 4477 |
|
|
case 0x0340:
|
| 4478 |
|
|
if (copy_from_user ((char *) &config, (char *) arg, sizeof (idetape_config_t)))
|
| 4479 |
|
|
return -EFAULT;
|
| 4480 |
|
|
tape->best_dsc_rw_frequency = config.dsc_rw_frequency;
|
| 4481 |
|
|
tape->max_stages = config.nr_stages;
|
| 4482 |
|
|
break;
|
| 4483 |
|
|
case 0x0350:
|
| 4484 |
|
|
config.dsc_rw_frequency = (int) tape->best_dsc_rw_frequency;
|
| 4485 |
|
|
config.nr_stages = tape->max_stages;
|
| 4486 |
|
|
if (copy_to_user ((char *) arg, (char *) &config, sizeof (idetape_config_t)))
|
| 4487 |
|
|
return -EFAULT;
|
| 4488 |
|
|
break;
|
| 4489 |
|
|
default:
|
| 4490 |
|
|
return -EIO;
|
| 4491 |
|
|
}
|
| 4492 |
|
|
return 0;
|
| 4493 |
|
|
}
|
| 4494 |
|
|
|
| 4495 |
|
|
/*
|
| 4496 |
|
|
* The block device interface should not be used for data transfers.
|
| 4497 |
|
|
* However, we still allow opening it so that we can issue general
|
| 4498 |
|
|
* ide driver configuration ioctl's, such as the interrupt unmask feature.
|
| 4499 |
|
|
*/
|
| 4500 |
|
|
static int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
|
| 4501 |
|
|
{
|
| 4502 |
|
|
MOD_INC_USE_COUNT;
|
| 4503 |
|
|
#if ONSTREAM_DEBUG
|
| 4504 |
|
|
printk(KERN_INFO "ide-tape: MOD_INC_USE_COUNT in %s\n", __FUNCTION__);
|
| 4505 |
|
|
#endif
|
| 4506 |
|
|
return 0;
|
| 4507 |
|
|
}
|
| 4508 |
|
|
|
| 4509 |
|
|
static void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
|
| 4510 |
|
|
{
|
| 4511 |
|
|
MOD_DEC_USE_COUNT;
|
| 4512 |
|
|
#if ONSTREAM_DEBUG
|
| 4513 |
|
|
printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT in %s\n", __FUNCTION__);
|
| 4514 |
|
|
#endif
|
| 4515 |
|
|
}
|
| 4516 |
|
|
|
| 4517 |
|
|
/*
|
| 4518 |
|
|
* idetape_pre_reset is called before an ATAPI/ATA software reset.
|
| 4519 |
|
|
*/
|
| 4520 |
|
|
static void idetape_pre_reset (ide_drive_t *drive)
|
| 4521 |
|
|
{
|
| 4522 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4523 |
|
|
if (tape != NULL)
|
| 4524 |
|
|
set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
|
| 4525 |
|
|
}
|
| 4526 |
|
|
|
| 4527 |
|
|
/*
|
| 4528 |
|
|
* Character device interface functions
|
| 4529 |
|
|
*/
|
| 4530 |
|
|
static ide_drive_t *get_drive_ptr (kdev_t i_rdev)
|
| 4531 |
|
|
{
|
| 4532 |
|
|
unsigned int i = MINOR(i_rdev) & ~0xc0;
|
| 4533 |
|
|
|
| 4534 |
|
|
if (i >= MAX_HWIFS * MAX_DRIVES)
|
| 4535 |
|
|
return NULL;
|
| 4536 |
|
|
return (idetape_chrdevs[i].drive);
|
| 4537 |
|
|
}
|
| 4538 |
|
|
|
| 4539 |
|
|
static int idetape_onstream_space_over_filemarks_backward (ide_drive_t *drive,short mt_op,int mt_count)
|
| 4540 |
|
|
{
|
| 4541 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4542 |
|
|
int cnt = 0;
|
| 4543 |
|
|
int last_mark_addr;
|
| 4544 |
|
|
unsigned long flags;
|
| 4545 |
|
|
|
| 4546 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4547 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical blk "
|
| 4548 |
|
|
"num in space_filemarks_bwd\n", tape->name);
|
| 4549 |
|
|
return -EIO;
|
| 4550 |
|
|
}
|
| 4551 |
|
|
while (cnt != mt_count) {
|
| 4552 |
|
|
last_mark_addr = ntohl(tape->first_stage->aux->last_mark_addr);
|
| 4553 |
|
|
if (last_mark_addr == -1)
|
| 4554 |
|
|
return -EIO;
|
| 4555 |
|
|
#if ONSTREAM_DEBUG
|
| 4556 |
|
|
if (tape->debug_level >= 2)
|
| 4557 |
|
|
printk(KERN_INFO "ide-tape: positioning to last "
|
| 4558 |
|
|
"mark at %d\n", last_mark_addr);
|
| 4559 |
|
|
#endif
|
| 4560 |
|
|
idetape_position_tape(drive, last_mark_addr, 0, 0);
|
| 4561 |
|
|
cnt++;
|
| 4562 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4563 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical "
|
| 4564 |
|
|
"blk num in space_filemarks\n", tape->name);
|
| 4565 |
|
|
return -EIO;
|
| 4566 |
|
|
}
|
| 4567 |
|
|
if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
|
| 4568 |
|
|
printk(KERN_INFO "ide-tape: %s: expected to find "
|
| 4569 |
|
|
"marker at block %d, not found\n",
|
| 4570 |
|
|
tape->name, last_mark_addr);
|
| 4571 |
|
|
return -EIO;
|
| 4572 |
|
|
}
|
| 4573 |
|
|
}
|
| 4574 |
|
|
if (mt_op == MTBSFM) {
|
| 4575 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4576 |
|
|
idetape_remove_stage_head (drive);
|
| 4577 |
|
|
tape->logical_blk_num++;
|
| 4578 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4579 |
|
|
}
|
| 4580 |
|
|
return 0;
|
| 4581 |
|
|
}
|
| 4582 |
|
|
|
| 4583 |
|
|
/*
|
| 4584 |
|
|
* ADRL 1.1 compatible "slow" space filemarks fwd version
|
| 4585 |
|
|
*
|
| 4586 |
|
|
* Just scans for the filemark sequentially.
|
| 4587 |
|
|
*/
|
| 4588 |
|
|
static int idetape_onstream_space_over_filemarks_forward_slow (ide_drive_t *drive,short mt_op,int mt_count)
|
| 4589 |
|
|
{
|
| 4590 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4591 |
|
|
int cnt = 0;
|
| 4592 |
|
|
unsigned long flags;
|
| 4593 |
|
|
|
| 4594 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4595 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical blk "
|
| 4596 |
|
|
"num in space_filemarks_fwd\n", tape->name);
|
| 4597 |
|
|
return -EIO;
|
| 4598 |
|
|
}
|
| 4599 |
|
|
while (1) {
|
| 4600 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4601 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical "
|
| 4602 |
|
|
"blk num in space_filemarks\n", tape->name);
|
| 4603 |
|
|
return -EIO;
|
| 4604 |
|
|
}
|
| 4605 |
|
|
if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_MARKER)
|
| 4606 |
|
|
cnt++;
|
| 4607 |
|
|
if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
|
| 4608 |
|
|
#if ONSTREAM_DEBUG
|
| 4609 |
|
|
if (tape->debug_level >= 2)
|
| 4610 |
|
|
printk(KERN_INFO "ide-tape: %s: space_fwd: "
|
| 4611 |
|
|
"EOD reached\n", tape->name);
|
| 4612 |
|
|
#endif
|
| 4613 |
|
|
return -EIO;
|
| 4614 |
|
|
}
|
| 4615 |
|
|
if (cnt == mt_count)
|
| 4616 |
|
|
break;
|
| 4617 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4618 |
|
|
idetape_remove_stage_head(drive);
|
| 4619 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4620 |
|
|
}
|
| 4621 |
|
|
if (mt_op == MTFSF) {
|
| 4622 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4623 |
|
|
idetape_remove_stage_head(drive);
|
| 4624 |
|
|
tape->logical_blk_num++;
|
| 4625 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4626 |
|
|
}
|
| 4627 |
|
|
return 0;
|
| 4628 |
|
|
}
|
| 4629 |
|
|
|
| 4630 |
|
|
|
| 4631 |
|
|
/*
|
| 4632 |
|
|
* Fast linux specific version of OnStream FSF
|
| 4633 |
|
|
*/
|
| 4634 |
|
|
static int idetape_onstream_space_over_filemarks_forward_fast (ide_drive_t *drive,short mt_op,int mt_count)
|
| 4635 |
|
|
{
|
| 4636 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4637 |
|
|
int cnt = 0, next_mark_addr;
|
| 4638 |
|
|
unsigned long flags;
|
| 4639 |
|
|
|
| 4640 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4641 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical blk "
|
| 4642 |
|
|
"num in space_filemarks_fwd\n", tape->name);
|
| 4643 |
|
|
return -EIO;
|
| 4644 |
|
|
}
|
| 4645 |
|
|
|
| 4646 |
|
|
/*
|
| 4647 |
|
|
* Find nearest (usually previous) marker
|
| 4648 |
|
|
*/
|
| 4649 |
|
|
while (1) {
|
| 4650 |
|
|
if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_MARKER)
|
| 4651 |
|
|
break;
|
| 4652 |
|
|
if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
|
| 4653 |
|
|
#if ONSTREAM_DEBUG
|
| 4654 |
|
|
if (tape->debug_level >= 2)
|
| 4655 |
|
|
printk(KERN_INFO "ide-tape: %s: space_fwd: "
|
| 4656 |
|
|
"EOD reached\n", tape->name);
|
| 4657 |
|
|
#endif
|
| 4658 |
|
|
return -EIO;
|
| 4659 |
|
|
}
|
| 4660 |
|
|
if (ntohl(tape->first_stage->aux->filemark_cnt) == 0) {
|
| 4661 |
|
|
if (tape->first_mark_addr == -1) {
|
| 4662 |
|
|
printk(KERN_INFO "ide-tape: %s: reverting to "
|
| 4663 |
|
|
"slow filemark space\n", tape->name);
|
| 4664 |
|
|
return idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count);
|
| 4665 |
|
|
}
|
| 4666 |
|
|
idetape_position_tape(drive, tape->first_mark_addr, 0, 0);
|
| 4667 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4668 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get "
|
| 4669 |
|
|
"logical blk num in %s\n", __FUNCTION__, tape->name);
|
| 4670 |
|
|
return -EIO;
|
| 4671 |
|
|
}
|
| 4672 |
|
|
if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
|
| 4673 |
|
|
printk(KERN_INFO "ide-tape: %s: expected to "
|
| 4674 |
|
|
"find filemark at %d\n",
|
| 4675 |
|
|
tape->name, tape->first_mark_addr);
|
| 4676 |
|
|
return -EIO;
|
| 4677 |
|
|
}
|
| 4678 |
|
|
} else {
|
| 4679 |
|
|
if (idetape_onstream_space_over_filemarks_backward(drive, MTBSF, 1) < 0)
|
| 4680 |
|
|
return -EIO;
|
| 4681 |
|
|
mt_count++;
|
| 4682 |
|
|
}
|
| 4683 |
|
|
}
|
| 4684 |
|
|
cnt++;
|
| 4685 |
|
|
while (cnt != mt_count) {
|
| 4686 |
|
|
next_mark_addr = ntohl(tape->first_stage->aux->next_mark_addr);
|
| 4687 |
|
|
if (!next_mark_addr || next_mark_addr > tape->eod_frame_addr) {
|
| 4688 |
|
|
printk(KERN_INFO "ide-tape: %s: reverting to slow "
|
| 4689 |
|
|
"filemark space\n", tape->name);
|
| 4690 |
|
|
return idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count - cnt);
|
| 4691 |
|
|
#if ONSTREAM_DEBUG
|
| 4692 |
|
|
} else if (tape->debug_level >= 2) {
|
| 4693 |
|
|
printk(KERN_INFO "ide-tape: positioning to next mark at %d\n", next_mark_addr);
|
| 4694 |
|
|
#endif
|
| 4695 |
|
|
}
|
| 4696 |
|
|
idetape_position_tape(drive, next_mark_addr, 0, 0);
|
| 4697 |
|
|
cnt++;
|
| 4698 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
|
| 4699 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't get logical "
|
| 4700 |
|
|
"blk num in space_filemarks\n", tape->name);
|
| 4701 |
|
|
return -EIO;
|
| 4702 |
|
|
}
|
| 4703 |
|
|
if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
|
| 4704 |
|
|
printk(KERN_INFO "ide-tape: %s: expected to find "
|
| 4705 |
|
|
"marker at block %d, not found\n",
|
| 4706 |
|
|
tape->name, next_mark_addr);
|
| 4707 |
|
|
return -EIO;
|
| 4708 |
|
|
}
|
| 4709 |
|
|
}
|
| 4710 |
|
|
if (mt_op == MTFSF) {
|
| 4711 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4712 |
|
|
idetape_remove_stage_head(drive);
|
| 4713 |
|
|
tape->logical_blk_num++;
|
| 4714 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4715 |
|
|
}
|
| 4716 |
|
|
return 0;
|
| 4717 |
|
|
}
|
| 4718 |
|
|
|
| 4719 |
|
|
/*
|
| 4720 |
|
|
* idetape_space_over_filemarks is now a bit more complicated than just
|
| 4721 |
|
|
* passing the command to the tape since we may have crossed some
|
| 4722 |
|
|
* filemarks during our pipelined read-ahead mode.
|
| 4723 |
|
|
*
|
| 4724 |
|
|
* As a minor side effect, the pipeline enables us to support MTFSFM when
|
| 4725 |
|
|
* the filemark is in our internal pipeline even if the tape doesn't
|
| 4726 |
|
|
* support spacing over filemarks in the reverse direction.
|
| 4727 |
|
|
*/
|
| 4728 |
|
|
static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_count)
|
| 4729 |
|
|
{
|
| 4730 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4731 |
|
|
idetape_pc_t pc;
|
| 4732 |
|
|
unsigned long flags;
|
| 4733 |
|
|
int retval,count=0;
|
| 4734 |
|
|
int speed_control;
|
| 4735 |
|
|
|
| 4736 |
|
|
if (tape->onstream) {
|
| 4737 |
|
|
if (tape->raw)
|
| 4738 |
|
|
return -EIO;
|
| 4739 |
|
|
speed_control = tape->speed_control;
|
| 4740 |
|
|
tape->speed_control = 0;
|
| 4741 |
|
|
if (mt_op == MTFSF || mt_op == MTFSFM) {
|
| 4742 |
|
|
if (tape->linux_media)
|
| 4743 |
|
|
retval = idetape_onstream_space_over_filemarks_forward_fast(drive, mt_op, mt_count);
|
| 4744 |
|
|
else
|
| 4745 |
|
|
retval = idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count);
|
| 4746 |
|
|
} else
|
| 4747 |
|
|
retval = idetape_onstream_space_over_filemarks_backward(drive, mt_op, mt_count);
|
| 4748 |
|
|
tape->speed_control = speed_control;
|
| 4749 |
|
|
tape->restart_speed_control_req = 1;
|
| 4750 |
|
|
return retval;
|
| 4751 |
|
|
}
|
| 4752 |
|
|
|
| 4753 |
|
|
if (mt_count == 0)
|
| 4754 |
|
|
return 0;
|
| 4755 |
|
|
if (MTBSF == mt_op || MTBSFM == mt_op) {
|
| 4756 |
|
|
if (!tape->capabilities.sprev)
|
| 4757 |
|
|
return -EIO;
|
| 4758 |
|
|
mt_count = - mt_count;
|
| 4759 |
|
|
}
|
| 4760 |
|
|
|
| 4761 |
|
|
if (tape->chrdev_direction == idetape_direction_read) {
|
| 4762 |
|
|
/*
|
| 4763 |
|
|
* We have a read-ahead buffer. Scan it for crossed
|
| 4764 |
|
|
* filemarks.
|
| 4765 |
|
|
*/
|
| 4766 |
|
|
tape->merge_stage_size = 0;
|
| 4767 |
|
|
if (test_and_clear_bit(IDETAPE_FILEMARK, &tape->flags))
|
| 4768 |
|
|
++count;
|
| 4769 |
|
|
while (tape->first_stage != NULL) {
|
| 4770 |
|
|
if (count == mt_count) {
|
| 4771 |
|
|
if (mt_op == MTFSFM)
|
| 4772 |
|
|
set_bit(IDETAPE_FILEMARK, &tape->flags);
|
| 4773 |
|
|
return 0;
|
| 4774 |
|
|
}
|
| 4775 |
|
|
spin_lock_irqsave(&tape->spinlock, flags);
|
| 4776 |
|
|
if (tape->first_stage == tape->active_stage) {
|
| 4777 |
|
|
/*
|
| 4778 |
|
|
* We have reached the active stage in the read pipeline.
|
| 4779 |
|
|
* There is no point in allowing the drive to continue
|
| 4780 |
|
|
* reading any farther, so we stop the pipeline.
|
| 4781 |
|
|
*
|
| 4782 |
|
|
* This section should be moved to a separate subroutine,
|
| 4783 |
|
|
* because a similar function is performed in
|
| 4784 |
|
|
* __idetape_discard_read_pipeline(), for example.
|
| 4785 |
|
|
*/
|
| 4786 |
|
|
tape->next_stage = NULL;
|
| 4787 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4788 |
|
|
idetape_wait_first_stage(drive);
|
| 4789 |
|
|
tape->next_stage = tape->first_stage->next;
|
| 4790 |
|
|
} else
|
| 4791 |
|
|
spin_unlock_irqrestore(&tape->spinlock, flags);
|
| 4792 |
|
|
if (tape->first_stage->rq.errors == IDETAPE_ERROR_FILEMARK)
|
| 4793 |
|
|
++count;
|
| 4794 |
|
|
idetape_remove_stage_head(drive);
|
| 4795 |
|
|
}
|
| 4796 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 4797 |
|
|
}
|
| 4798 |
|
|
|
| 4799 |
|
|
/*
|
| 4800 |
|
|
* The filemark was not found in our internal pipeline.
|
| 4801 |
|
|
* Now we can issue the space command.
|
| 4802 |
|
|
*/
|
| 4803 |
|
|
switch (mt_op) {
|
| 4804 |
|
|
case MTFSF:
|
| 4805 |
|
|
case MTBSF:
|
| 4806 |
|
|
idetape_create_space_cmd(&pc,mt_count-count,IDETAPE_SPACE_OVER_FILEMARK);
|
| 4807 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 4808 |
|
|
case MTFSFM:
|
| 4809 |
|
|
case MTBSFM:
|
| 4810 |
|
|
if (!tape->capabilities.sprev)
|
| 4811 |
|
|
return (-EIO);
|
| 4812 |
|
|
retval = idetape_space_over_filemarks(drive, MTFSF, mt_count-count);
|
| 4813 |
|
|
if (retval) return (retval);
|
| 4814 |
|
|
count = (MTBSFM == mt_op ? 1 : -1);
|
| 4815 |
|
|
return (idetape_space_over_filemarks(drive, MTFSF, count));
|
| 4816 |
|
|
default:
|
| 4817 |
|
|
printk(KERN_ERR "ide-tape: MTIO operation %d not "
|
| 4818 |
|
|
"supported\n", mt_op);
|
| 4819 |
|
|
return (-EIO);
|
| 4820 |
|
|
}
|
| 4821 |
|
|
}
|
| 4822 |
|
|
|
| 4823 |
|
|
|
| 4824 |
|
|
/*
|
| 4825 |
|
|
* Our character device read / write functions.
|
| 4826 |
|
|
*
|
| 4827 |
|
|
* The tape is optimized to maximize throughput when it is transferring
|
| 4828 |
|
|
* an integral number of the "continuous transfer limit", which is
|
| 4829 |
|
|
* a parameter of the specific tape (26 KB on my particular tape).
|
| 4830 |
|
|
* (32 kB for Onstream)
|
| 4831 |
|
|
*
|
| 4832 |
|
|
* As of version 1.3 of the driver, the character device provides an
|
| 4833 |
|
|
* abstract continuous view of the media - any mix of block sizes (even 1
|
| 4834 |
|
|
* byte) on the same backup/restore procedure is supported. The driver
|
| 4835 |
|
|
* will internally convert the requests to the recommended transfer unit,
|
| 4836 |
|
|
* so that an unmatch between the user's block size to the recommended
|
| 4837 |
|
|
* size will only result in a (slightly) increased driver overhead, but
|
| 4838 |
|
|
* will no longer hit performance.
|
| 4839 |
|
|
* This is not applicable to Onstream.
|
| 4840 |
|
|
*/
|
| 4841 |
|
|
static ssize_t idetape_chrdev_read (struct file *file, char *buf,
|
| 4842 |
|
|
size_t count, loff_t *ppos)
|
| 4843 |
|
|
{
|
| 4844 |
|
|
struct inode *inode = file->f_dentry->d_inode;
|
| 4845 |
|
|
ide_drive_t *drive = get_drive_ptr(inode->i_rdev);
|
| 4846 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4847 |
|
|
ssize_t bytes_read,temp, actually_read = 0, rc;
|
| 4848 |
|
|
|
| 4849 |
|
|
if (ppos != &file->f_pos) {
|
| 4850 |
|
|
/* "A request was outside the capabilities of the device." */
|
| 4851 |
|
|
return -ENXIO;
|
| 4852 |
|
|
}
|
| 4853 |
|
|
if (tape->onstream && (count != tape->tape_block_size)) {
|
| 4854 |
|
|
printk(KERN_ERR "ide-tape: %s: use %d bytes as block size "
|
| 4855 |
|
|
"(%Zd used)\n", tape->name,
|
| 4856 |
|
|
tape->tape_block_size, count);
|
| 4857 |
|
|
return -EINVAL;
|
| 4858 |
|
|
}
|
| 4859 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 4860 |
|
|
if (tape->debug_level >= 3)
|
| 4861 |
|
|
printk (KERN_INFO "ide-tape: Reached %s, count %Zd\n",
|
| 4862 |
|
|
__FUNCTION__, count);
|
| 4863 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 4864 |
|
|
|
| 4865 |
|
|
if (tape->chrdev_direction != idetape_direction_read) {
|
| 4866 |
|
|
if (test_bit(IDETAPE_DETECT_BS, &tape->flags))
|
| 4867 |
|
|
if (count > tape->tape_block_size &&
|
| 4868 |
|
|
(count % tape->tape_block_size) == 0)
|
| 4869 |
|
|
tape->user_bs_factor = count / tape->tape_block_size;
|
| 4870 |
|
|
}
|
| 4871 |
|
|
if ((rc = idetape_initiate_read(drive, tape->max_stages)) < 0)
|
| 4872 |
|
|
return rc;
|
| 4873 |
|
|
if (count == 0)
|
| 4874 |
|
|
return (0);
|
| 4875 |
|
|
if (tape->merge_stage_size) {
|
| 4876 |
|
|
actually_read = IDE_MIN(tape->merge_stage_size, count);
|
| 4877 |
|
|
idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read);
|
| 4878 |
|
|
buf += actually_read;
|
| 4879 |
|
|
tape->merge_stage_size -= actually_read;
|
| 4880 |
|
|
count -= actually_read;
|
| 4881 |
|
|
}
|
| 4882 |
|
|
while (count >= tape->stage_size) {
|
| 4883 |
|
|
bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
|
| 4884 |
|
|
if (bytes_read <= 0)
|
| 4885 |
|
|
goto finish;
|
| 4886 |
|
|
idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read);
|
| 4887 |
|
|
buf += bytes_read;
|
| 4888 |
|
|
count -= bytes_read;
|
| 4889 |
|
|
actually_read += bytes_read;
|
| 4890 |
|
|
}
|
| 4891 |
|
|
if (count) {
|
| 4892 |
|
|
bytes_read=idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
|
| 4893 |
|
|
if (bytes_read <= 0)
|
| 4894 |
|
|
goto finish;
|
| 4895 |
|
|
temp = IDE_MIN(count, bytes_read);
|
| 4896 |
|
|
idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp);
|
| 4897 |
|
|
actually_read += temp;
|
| 4898 |
|
|
tape->merge_stage_size = bytes_read-temp;
|
| 4899 |
|
|
}
|
| 4900 |
|
|
finish:
|
| 4901 |
|
|
if (!actually_read && test_bit(IDETAPE_FILEMARK, &tape->flags)) {
|
| 4902 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 4903 |
|
|
if (tape->debug_level >= 2)
|
| 4904 |
|
|
printk(KERN_INFO "ide-tape: %s: spacing over "
|
| 4905 |
|
|
"filemark\n", tape->name);
|
| 4906 |
|
|
#endif
|
| 4907 |
|
|
idetape_space_over_filemarks (drive, MTFSF, 1);
|
| 4908 |
|
|
return 0;
|
| 4909 |
|
|
}
|
| 4910 |
|
|
if (tape->onstream && !actually_read &&
|
| 4911 |
|
|
test_and_clear_bit(IDETAPE_READ_ERROR, &tape->flags)) {
|
| 4912 |
|
|
printk(KERN_ERR "ide-tape: %s: unrecovered read error on "
|
| 4913 |
|
|
"logical block number %d, skipping\n",
|
| 4914 |
|
|
tape->name, tape->logical_blk_num);
|
| 4915 |
|
|
tape->logical_blk_num++;
|
| 4916 |
|
|
return -EIO;
|
| 4917 |
|
|
}
|
| 4918 |
|
|
return actually_read;
|
| 4919 |
|
|
}
|
| 4920 |
|
|
|
| 4921 |
|
|
static void idetape_update_last_marker (ide_drive_t *drive, int last_mark_addr, int next_mark_addr)
|
| 4922 |
|
|
{
|
| 4923 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4924 |
|
|
idetape_stage_t *stage;
|
| 4925 |
|
|
os_aux_t *aux;
|
| 4926 |
|
|
int position;
|
| 4927 |
|
|
|
| 4928 |
|
|
if (!tape->onstream || tape->raw)
|
| 4929 |
|
|
return;
|
| 4930 |
|
|
if (last_mark_addr == -1)
|
| 4931 |
|
|
return;
|
| 4932 |
|
|
stage = __idetape_kmalloc_stage(tape, 0, 0);
|
| 4933 |
|
|
if (stage == NULL)
|
| 4934 |
|
|
return;
|
| 4935 |
|
|
idetape_flush_tape_buffers(drive);
|
| 4936 |
|
|
position = idetape_read_position(drive);
|
| 4937 |
|
|
#if ONSTREAM_DEBUG
|
| 4938 |
|
|
if (tape->debug_level >= 2)
|
| 4939 |
|
|
printk(KERN_INFO "ide-tape: current position (2) %d, "
|
| 4940 |
|
|
"lblk %d\n", position, tape->logical_blk_num);
|
| 4941 |
|
|
if (tape->debug_level >= 2)
|
| 4942 |
|
|
printk(KERN_INFO "ide-tape: current position (2) tape "
|
| 4943 |
|
|
"block %d\n", tape->last_frame_position);
|
| 4944 |
|
|
#endif
|
| 4945 |
|
|
idetape_position_tape(drive, last_mark_addr, 0, 0);
|
| 4946 |
|
|
if (!idetape_queue_rw_tail(drive, IDETAPE_READ_RQ, 1, stage->bh)) {
|
| 4947 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't read last marker\n",
|
| 4948 |
|
|
tape->name);
|
| 4949 |
|
|
__idetape_kfree_stage(stage);
|
| 4950 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 4951 |
|
|
return;
|
| 4952 |
|
|
}
|
| 4953 |
|
|
aux = stage->aux;
|
| 4954 |
|
|
if (aux->frame_type != OS_FRAME_TYPE_MARKER) {
|
| 4955 |
|
|
printk(KERN_INFO "ide-tape: %s: expected to find marker "
|
| 4956 |
|
|
"at addr %d\n", tape->name, last_mark_addr);
|
| 4957 |
|
|
__idetape_kfree_stage(stage);
|
| 4958 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 4959 |
|
|
return;
|
| 4960 |
|
|
}
|
| 4961 |
|
|
#if ONSTREAM_DEBUG
|
| 4962 |
|
|
if (tape->debug_level >= 2)
|
| 4963 |
|
|
printk(KERN_INFO "ide-tape: writing back marker\n");
|
| 4964 |
|
|
#endif
|
| 4965 |
|
|
aux->next_mark_addr = htonl(next_mark_addr);
|
| 4966 |
|
|
idetape_position_tape(drive, last_mark_addr, 0, 0);
|
| 4967 |
|
|
if (!idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, 1, stage->bh)) {
|
| 4968 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't write back marker "
|
| 4969 |
|
|
"frame at %d\n", tape->name, last_mark_addr);
|
| 4970 |
|
|
__idetape_kfree_stage(stage);
|
| 4971 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 4972 |
|
|
return;
|
| 4973 |
|
|
}
|
| 4974 |
|
|
__idetape_kfree_stage(stage);
|
| 4975 |
|
|
idetape_flush_tape_buffers (drive);
|
| 4976 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 4977 |
|
|
return;
|
| 4978 |
|
|
}
|
| 4979 |
|
|
|
| 4980 |
|
|
static void idetape_write_filler (ide_drive_t *drive, int block, int cnt)
|
| 4981 |
|
|
{
|
| 4982 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 4983 |
|
|
idetape_stage_t *stage;
|
| 4984 |
|
|
int rc;
|
| 4985 |
|
|
|
| 4986 |
|
|
if (!tape->onstream || tape->raw)
|
| 4987 |
|
|
return;
|
| 4988 |
|
|
stage = __idetape_kmalloc_stage(tape, 1, 1);
|
| 4989 |
|
|
if (stage == NULL)
|
| 4990 |
|
|
return;
|
| 4991 |
|
|
idetape_init_stage(drive, stage, OS_FRAME_TYPE_FILL, 0);
|
| 4992 |
|
|
idetape_wait_ready(drive, 60 * 5 * HZ);
|
| 4993 |
|
|
rc = idetape_position_tape(drive, block, 0, 0);
|
| 4994 |
|
|
#if ONSTREAM_DEBUG
|
| 4995 |
|
|
printk(KERN_INFO "write_filler: positioning failed it returned %d\n", rc);
|
| 4996 |
|
|
#endif
|
| 4997 |
|
|
if (rc != 0)
|
| 4998 |
|
|
/* don't write fillers if we cannot position the tape. */
|
| 4999 |
|
|
return;
|
| 5000 |
|
|
|
| 5001 |
|
|
strcpy(stage->bh->b_data, "Filler");
|
| 5002 |
|
|
while (cnt--) {
|
| 5003 |
|
|
if (!idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, 1, stage->bh)) {
|
| 5004 |
|
|
printk(KERN_INFO "ide-tape: %s: write_filler: "
|
| 5005 |
|
|
"couldn't write header frame\n", tape->name);
|
| 5006 |
|
|
__idetape_kfree_stage(stage);
|
| 5007 |
|
|
return;
|
| 5008 |
|
|
}
|
| 5009 |
|
|
}
|
| 5010 |
|
|
__idetape_kfree_stage(stage);
|
| 5011 |
|
|
}
|
| 5012 |
|
|
|
| 5013 |
|
|
static void __idetape_write_header (ide_drive_t *drive, int block, int cnt)
|
| 5014 |
|
|
{
|
| 5015 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5016 |
|
|
idetape_stage_t *stage;
|
| 5017 |
|
|
os_header_t header;
|
| 5018 |
|
|
|
| 5019 |
|
|
stage = __idetape_kmalloc_stage(tape, 1, 1);
|
| 5020 |
|
|
if (stage == NULL)
|
| 5021 |
|
|
return;
|
| 5022 |
|
|
idetape_init_stage(drive, stage, OS_FRAME_TYPE_HEADER, tape->logical_blk_num);
|
| 5023 |
|
|
idetape_wait_ready(drive, 60 * 5 * HZ);
|
| 5024 |
|
|
idetape_position_tape(drive, block, 0, 0);
|
| 5025 |
|
|
memset(&header, 0, sizeof(header));
|
| 5026 |
|
|
strcpy(header.ident_str, "ADR_SEQ");
|
| 5027 |
|
|
header.major_rev = 1;
|
| 5028 |
|
|
header.minor_rev = OS_ADR_MINREV;
|
| 5029 |
|
|
header.par_num = 1;
|
| 5030 |
|
|
header.partition.partition_num = OS_DATA_PARTITION;
|
| 5031 |
|
|
header.partition.par_desc_ver = OS_PARTITION_VERSION;
|
| 5032 |
|
|
header.partition.first_frame_addr = htonl(OS_DATA_STARTFRAME1);
|
| 5033 |
|
|
header.partition.last_frame_addr = htonl(tape->capacity);
|
| 5034 |
|
|
header.partition.wrt_pass_cntr = htons(tape->wrt_pass_cntr);
|
| 5035 |
|
|
header.partition.eod_frame_addr = htonl(tape->eod_frame_addr);
|
| 5036 |
|
|
memcpy(stage->bh->b_data, &header, sizeof(header));
|
| 5037 |
|
|
while (cnt--) {
|
| 5038 |
|
|
if (!idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, 1, stage->bh)) {
|
| 5039 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't write header frame\n", tape->name);
|
| 5040 |
|
|
__idetape_kfree_stage(stage);
|
| 5041 |
|
|
return;
|
| 5042 |
|
|
}
|
| 5043 |
|
|
}
|
| 5044 |
|
|
__idetape_kfree_stage(stage);
|
| 5045 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5046 |
|
|
}
|
| 5047 |
|
|
|
| 5048 |
|
|
static void idetape_write_header (ide_drive_t *drive, int locate_eod)
|
| 5049 |
|
|
{
|
| 5050 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5051 |
|
|
|
| 5052 |
|
|
#if ONSTREAM_DEBUG
|
| 5053 |
|
|
if (tape->debug_level >= 2)
|
| 5054 |
|
|
printk(KERN_INFO "ide-tape: %s: writing tape header\n", tape->name);
|
| 5055 |
|
|
#endif
|
| 5056 |
|
|
if (!tape->onstream || tape->raw)
|
| 5057 |
|
|
return;
|
| 5058 |
|
|
tape->update_frame_cntr++;
|
| 5059 |
|
|
__idetape_write_header(drive, 5, 5);
|
| 5060 |
|
|
__idetape_write_header(drive, 0xbae, 5); /* 2990 */
|
| 5061 |
|
|
if (locate_eod) {
|
| 5062 |
|
|
#if ONSTREAM_DEBUG
|
| 5063 |
|
|
if (tape->debug_level >= 2)
|
| 5064 |
|
|
printk(KERN_INFO "ide-tape: %s: locating back to "
|
| 5065 |
|
|
"eod frame addr %d\n", tape->name,
|
| 5066 |
|
|
tape->eod_frame_addr);
|
| 5067 |
|
|
#endif
|
| 5068 |
|
|
idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
|
| 5069 |
|
|
}
|
| 5070 |
|
|
}
|
| 5071 |
|
|
|
| 5072 |
|
|
static ssize_t idetape_chrdev_write (struct file *file, const char *buf,
|
| 5073 |
|
|
size_t count, loff_t *ppos)
|
| 5074 |
|
|
{
|
| 5075 |
|
|
struct inode *inode = file->f_dentry->d_inode;
|
| 5076 |
|
|
ide_drive_t *drive = get_drive_ptr(inode->i_rdev);
|
| 5077 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5078 |
|
|
ssize_t retval, actually_written = 0;
|
| 5079 |
|
|
int position;
|
| 5080 |
|
|
|
| 5081 |
|
|
if (ppos != &file->f_pos) {
|
| 5082 |
|
|
/* "A request was outside the capabilities of the device." */
|
| 5083 |
|
|
return -ENXIO;
|
| 5084 |
|
|
}
|
| 5085 |
|
|
|
| 5086 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 5087 |
|
|
if (tape->debug_level >= 3)
|
| 5088 |
|
|
printk (KERN_INFO "ide-tape: Reached idetape_chrdev_write, count %Zd\n", count);
|
| 5089 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 5090 |
|
|
|
| 5091 |
|
|
if (tape->onstream) {
|
| 5092 |
|
|
if (count != tape->tape_block_size) {
|
| 5093 |
|
|
printk(KERN_ERR "ide-tape: %s: chrdev_write: "
|
| 5094 |
|
|
"use %d bytes as block size (%Zd used)\n",
|
| 5095 |
|
|
tape->name, tape->tape_block_size, count);
|
| 5096 |
|
|
return -EINVAL;
|
| 5097 |
|
|
}
|
| 5098 |
|
|
/*
|
| 5099 |
|
|
* Check if we reach the end of the tape. Just assume the whole
|
| 5100 |
|
|
* pipeline is filled with write requests!
|
| 5101 |
|
|
*/
|
| 5102 |
|
|
if (tape->first_frame_position + tape->nr_stages >= tape->capacity - OS_EW) {
|
| 5103 |
|
|
#if ONSTREAM_DEBUG
|
| 5104 |
|
|
printk(KERN_INFO, "chrdev_write: Write truncated at EOM early warning");
|
| 5105 |
|
|
#endif
|
| 5106 |
|
|
if (tape->chrdev_direction == idetape_direction_write)
|
| 5107 |
|
|
idetape_write_release(inode);
|
| 5108 |
|
|
return -ENOSPC;
|
| 5109 |
|
|
}
|
| 5110 |
|
|
}
|
| 5111 |
|
|
|
| 5112 |
|
|
/* Initialize write operation */
|
| 5113 |
|
|
if (tape->chrdev_direction != idetape_direction_write) {
|
| 5114 |
|
|
if (tape->chrdev_direction == idetape_direction_read)
|
| 5115 |
|
|
idetape_discard_read_pipeline(drive, 1);
|
| 5116 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 5117 |
|
|
if (tape->merge_stage || tape->merge_stage_size) {
|
| 5118 |
|
|
printk(KERN_ERR "ide-tape: merge_stage_size should be 0 now\n");
|
| 5119 |
|
|
tape->merge_stage_size = 0;
|
| 5120 |
|
|
}
|
| 5121 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 5122 |
|
|
if ((tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0)) == NULL)
|
| 5123 |
|
|
return -ENOMEM;
|
| 5124 |
|
|
tape->chrdev_direction = idetape_direction_write;
|
| 5125 |
|
|
idetape_init_merge_stage(tape);
|
| 5126 |
|
|
|
| 5127 |
|
|
if (tape->onstream) {
|
| 5128 |
|
|
position = idetape_read_position(drive);
|
| 5129 |
|
|
if (position <= OS_DATA_STARTFRAME1) {
|
| 5130 |
|
|
tape->logical_blk_num = 0;
|
| 5131 |
|
|
tape->wrt_pass_cntr++;
|
| 5132 |
|
|
#if ONSTREAM_DEBUG
|
| 5133 |
|
|
if (tape->debug_level >= 2)
|
| 5134 |
|
|
printk(KERN_INFO "ide-tape: %s: logical block num 0, setting eod to %d\n", tape->name, OS_DATA_STARTFRAME1);
|
| 5135 |
|
|
if (tape->debug_level >= 2)
|
| 5136 |
|
|
printk(KERN_INFO "ide-tape: %s: allocating new write pass counter %d\n", tape->name, tape->wrt_pass_cntr);
|
| 5137 |
|
|
#endif
|
| 5138 |
|
|
tape->filemark_cnt = 0;
|
| 5139 |
|
|
tape->eod_frame_addr = OS_DATA_STARTFRAME1;
|
| 5140 |
|
|
tape->first_mark_addr = tape->last_mark_addr = -1;
|
| 5141 |
|
|
idetape_write_header(drive, 1);
|
| 5142 |
|
|
}
|
| 5143 |
|
|
#if ONSTREAM_DEBUG
|
| 5144 |
|
|
if (tape->debug_level >= 2)
|
| 5145 |
|
|
printk(KERN_INFO "ide-tape: %s: positioning tape to eod at %d\n", tape->name, tape->eod_frame_addr);
|
| 5146 |
|
|
#endif
|
| 5147 |
|
|
position = idetape_read_position(drive);
|
| 5148 |
|
|
if (position != tape->eod_frame_addr)
|
| 5149 |
|
|
idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
|
| 5150 |
|
|
#if ONSTREAM_DEBUG
|
| 5151 |
|
|
if (tape->debug_level >= 2)
|
| 5152 |
|
|
printk(KERN_INFO "ide-tape: %s: first_frame_position %d\n", tape->name, tape->first_frame_position);
|
| 5153 |
|
|
#endif
|
| 5154 |
|
|
}
|
| 5155 |
|
|
|
| 5156 |
|
|
/*
|
| 5157 |
|
|
* Issue a write 0 command to ensure that DSC handshake
|
| 5158 |
|
|
* is switched from completion mode to buffer available
|
| 5159 |
|
|
* mode.
|
| 5160 |
|
|
*/
|
| 5161 |
|
|
retval = idetape_queue_rw_tail(drive, IDETAPE_WRITE_RQ, 0, tape->merge_stage->bh);
|
| 5162 |
|
|
if (retval < 0) {
|
| 5163 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 5164 |
|
|
tape->merge_stage = NULL;
|
| 5165 |
|
|
tape->chrdev_direction = idetape_direction_none;
|
| 5166 |
|
|
return retval;
|
| 5167 |
|
|
}
|
| 5168 |
|
|
#if ONSTREAM_DEBUG
|
| 5169 |
|
|
if (tape->debug_level >= 2)
|
| 5170 |
|
|
printk("ide-tape: first_frame_position %d\n", tape->first_frame_position);
|
| 5171 |
|
|
#endif
|
| 5172 |
|
|
}
|
| 5173 |
|
|
if (count == 0)
|
| 5174 |
|
|
return (0);
|
| 5175 |
|
|
if (tape->restart_speed_control_req)
|
| 5176 |
|
|
idetape_restart_speed_control(drive);
|
| 5177 |
|
|
if (tape->merge_stage_size) {
|
| 5178 |
|
|
#if IDETAPE_DEBUG_BUGS
|
| 5179 |
|
|
if (tape->merge_stage_size >= tape->stage_size) {
|
| 5180 |
|
|
printk(KERN_ERR "ide-tape: bug: merge buffer too big\n");
|
| 5181 |
|
|
tape->merge_stage_size = 0;
|
| 5182 |
|
|
}
|
| 5183 |
|
|
#endif /* IDETAPE_DEBUG_BUGS */
|
| 5184 |
|
|
actually_written = IDE_MIN(tape->stage_size - tape->merge_stage_size, count);
|
| 5185 |
|
|
idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written);
|
| 5186 |
|
|
buf += actually_written;
|
| 5187 |
|
|
tape->merge_stage_size += actually_written;
|
| 5188 |
|
|
count -= actually_written;
|
| 5189 |
|
|
|
| 5190 |
|
|
if (tape->merge_stage_size == tape->stage_size) {
|
| 5191 |
|
|
tape->merge_stage_size = 0;
|
| 5192 |
|
|
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
|
| 5193 |
|
|
if (retval <= 0)
|
| 5194 |
|
|
return (retval);
|
| 5195 |
|
|
}
|
| 5196 |
|
|
}
|
| 5197 |
|
|
while (count >= tape->stage_size) {
|
| 5198 |
|
|
idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size);
|
| 5199 |
|
|
buf += tape->stage_size;
|
| 5200 |
|
|
count -= tape->stage_size;
|
| 5201 |
|
|
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
|
| 5202 |
|
|
actually_written += tape->stage_size;
|
| 5203 |
|
|
if (retval <= 0)
|
| 5204 |
|
|
return (retval);
|
| 5205 |
|
|
}
|
| 5206 |
|
|
if (count) {
|
| 5207 |
|
|
actually_written += count;
|
| 5208 |
|
|
idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count);
|
| 5209 |
|
|
tape->merge_stage_size += count;
|
| 5210 |
|
|
}
|
| 5211 |
|
|
return (actually_written);
|
| 5212 |
|
|
}
|
| 5213 |
|
|
|
| 5214 |
|
|
static int idetape_write_filemark (ide_drive_t *drive)
|
| 5215 |
|
|
{
|
| 5216 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5217 |
|
|
int last_mark_addr;
|
| 5218 |
|
|
idetape_pc_t pc;
|
| 5219 |
|
|
|
| 5220 |
|
|
if (!tape->onstream) {
|
| 5221 |
|
|
/* Write a filemark */
|
| 5222 |
|
|
idetape_create_write_filemark_cmd(drive, &pc, 1);
|
| 5223 |
|
|
if (idetape_queue_pc_tail(drive, &pc)) {
|
| 5224 |
|
|
printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
|
| 5225 |
|
|
return -EIO;
|
| 5226 |
|
|
}
|
| 5227 |
|
|
} else if (!tape->raw) {
|
| 5228 |
|
|
last_mark_addr = idetape_read_position(drive);
|
| 5229 |
|
|
tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
|
| 5230 |
|
|
if (tape->merge_stage != NULL) {
|
| 5231 |
|
|
idetape_init_stage(drive, tape->merge_stage, OS_FRAME_TYPE_MARKER, tape->logical_blk_num);
|
| 5232 |
|
|
idetape_pad_zeros(drive, tape->stage_size);
|
| 5233 |
|
|
tape->logical_blk_num++;
|
| 5234 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 5235 |
|
|
tape->merge_stage = NULL;
|
| 5236 |
|
|
}
|
| 5237 |
|
|
if (tape->filemark_cnt)
|
| 5238 |
|
|
idetape_update_last_marker(drive, tape->last_mark_addr, last_mark_addr);
|
| 5239 |
|
|
tape->last_mark_addr = last_mark_addr;
|
| 5240 |
|
|
if (tape->filemark_cnt++ == 0)
|
| 5241 |
|
|
tape->first_mark_addr = last_mark_addr;
|
| 5242 |
|
|
}
|
| 5243 |
|
|
return 0;
|
| 5244 |
|
|
}
|
| 5245 |
|
|
|
| 5246 |
|
|
static void idetape_write_eod (ide_drive_t *drive)
|
| 5247 |
|
|
{
|
| 5248 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5249 |
|
|
|
| 5250 |
|
|
if (!tape->onstream || tape->raw)
|
| 5251 |
|
|
return;
|
| 5252 |
|
|
tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
|
| 5253 |
|
|
if (tape->merge_stage != NULL) {
|
| 5254 |
|
|
tape->eod_frame_addr = idetape_read_position(drive);
|
| 5255 |
|
|
idetape_init_stage(drive, tape->merge_stage, OS_FRAME_TYPE_EOD, tape->logical_blk_num);
|
| 5256 |
|
|
idetape_pad_zeros(drive, tape->stage_size);
|
| 5257 |
|
|
__idetape_kfree_stage (tape->merge_stage);
|
| 5258 |
|
|
tape->merge_stage = NULL;
|
| 5259 |
|
|
}
|
| 5260 |
|
|
return;
|
| 5261 |
|
|
}
|
| 5262 |
|
|
|
| 5263 |
|
|
int idetape_seek_logical_blk (ide_drive_t *drive, int logical_blk_num)
|
| 5264 |
|
|
{
|
| 5265 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5266 |
|
|
int estimated_address = logical_blk_num + 20;
|
| 5267 |
|
|
int retries = 0;
|
| 5268 |
|
|
int speed_control;
|
| 5269 |
|
|
|
| 5270 |
|
|
speed_control = tape->speed_control;
|
| 5271 |
|
|
tape->speed_control = 0;
|
| 5272 |
|
|
if (logical_blk_num < 0)
|
| 5273 |
|
|
logical_blk_num = 0;
|
| 5274 |
|
|
if (idetape_get_logical_blk(drive, logical_blk_num, 10, 1))
|
| 5275 |
|
|
goto ok;
|
| 5276 |
|
|
while (++retries < 10) {
|
| 5277 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5278 |
|
|
idetape_position_tape(drive, estimated_address, 0, 0);
|
| 5279 |
|
|
if (idetape_get_logical_blk(drive, logical_blk_num, 10, 1))
|
| 5280 |
|
|
goto ok;
|
| 5281 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 1))
|
| 5282 |
|
|
goto error;
|
| 5283 |
|
|
if (tape->logical_blk_num < logical_blk_num)
|
| 5284 |
|
|
estimated_address += logical_blk_num - tape->logical_blk_num;
|
| 5285 |
|
|
else
|
| 5286 |
|
|
break;
|
| 5287 |
|
|
}
|
| 5288 |
|
|
error:
|
| 5289 |
|
|
tape->speed_control = speed_control;
|
| 5290 |
|
|
tape->restart_speed_control_req = 1;
|
| 5291 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't seek to logical block %d "
|
| 5292 |
|
|
"(at %d), %d retries\n", tape->name, logical_blk_num,
|
| 5293 |
|
|
tape->logical_blk_num, retries);
|
| 5294 |
|
|
return -EIO;
|
| 5295 |
|
|
ok:
|
| 5296 |
|
|
tape->speed_control = speed_control;
|
| 5297 |
|
|
tape->restart_speed_control_req = 1;
|
| 5298 |
|
|
return 0;
|
| 5299 |
|
|
}
|
| 5300 |
|
|
|
| 5301 |
|
|
/*
|
| 5302 |
|
|
* idetape_mtioctop is called from idetape_chrdev_ioctl when
|
| 5303 |
|
|
* the general mtio MTIOCTOP ioctl is requested.
|
| 5304 |
|
|
*
|
| 5305 |
|
|
* We currently support the following mtio.h operations:
|
| 5306 |
|
|
*
|
| 5307 |
|
|
* MTFSF - Space over mt_count filemarks in the positive direction.
|
| 5308 |
|
|
* The tape is positioned after the last spaced filemark.
|
| 5309 |
|
|
*
|
| 5310 |
|
|
* MTFSFM - Same as MTFSF, but the tape is positioned before the
|
| 5311 |
|
|
* last filemark.
|
| 5312 |
|
|
*
|
| 5313 |
|
|
* MTBSF - Steps background over mt_count filemarks, tape is
|
| 5314 |
|
|
* positioned before the last filemark.
|
| 5315 |
|
|
*
|
| 5316 |
|
|
* MTBSFM - Like MTBSF, only tape is positioned after the last filemark.
|
| 5317 |
|
|
*
|
| 5318 |
|
|
* Note:
|
| 5319 |
|
|
*
|
| 5320 |
|
|
* MTBSF and MTBSFM are not supported when the tape doesn't
|
| 5321 |
|
|
* supports spacing over filemarks in the reverse direction.
|
| 5322 |
|
|
* In this case, MTFSFM is also usually not supported (it is
|
| 5323 |
|
|
* supported in the rare case in which we crossed the filemark
|
| 5324 |
|
|
* during our read-ahead pipelined operation mode).
|
| 5325 |
|
|
*
|
| 5326 |
|
|
* MTWEOF - Writes mt_count filemarks. Tape is positioned after
|
| 5327 |
|
|
* the last written filemark.
|
| 5328 |
|
|
*
|
| 5329 |
|
|
* MTREW - Rewinds tape.
|
| 5330 |
|
|
*
|
| 5331 |
|
|
* MTLOAD - Loads the tape.
|
| 5332 |
|
|
*
|
| 5333 |
|
|
* MTOFFL - Puts the tape drive "Offline": Rewinds the tape and
|
| 5334 |
|
|
* MTUNLOAD prevents further access until the media is replaced.
|
| 5335 |
|
|
*
|
| 5336 |
|
|
* MTNOP - Flushes tape buffers.
|
| 5337 |
|
|
*
|
| 5338 |
|
|
* MTRETEN - Retension media. This typically consists of one end
|
| 5339 |
|
|
* to end pass on the media.
|
| 5340 |
|
|
*
|
| 5341 |
|
|
* MTEOM - Moves to the end of recorded data.
|
| 5342 |
|
|
*
|
| 5343 |
|
|
* MTERASE - Erases tape.
|
| 5344 |
|
|
*
|
| 5345 |
|
|
* MTSETBLK - Sets the user block size to mt_count bytes. If
|
| 5346 |
|
|
* mt_count is 0, we will attempt to autodetect
|
| 5347 |
|
|
* the block size.
|
| 5348 |
|
|
*
|
| 5349 |
|
|
* MTSEEK - Positions the tape in a specific block number, where
|
| 5350 |
|
|
* each block is assumed to contain which user_block_size
|
| 5351 |
|
|
* bytes.
|
| 5352 |
|
|
*
|
| 5353 |
|
|
* MTSETPART - Switches to another tape partition.
|
| 5354 |
|
|
*
|
| 5355 |
|
|
* MTLOCK - Locks the tape door.
|
| 5356 |
|
|
*
|
| 5357 |
|
|
* MTUNLOCK - Unlocks the tape door.
|
| 5358 |
|
|
*
|
| 5359 |
|
|
* The following commands are currently not supported:
|
| 5360 |
|
|
*
|
| 5361 |
|
|
* MTFSS, MTBSS, MTWSM, MTSETDENSITY,
|
| 5362 |
|
|
* MTSETDRVBUFFER, MT_ST_BOOLEANS, MT_ST_WRITE_THRESHOLD.
|
| 5363 |
|
|
*/
|
| 5364 |
|
|
static int idetape_mtioctop (ide_drive_t *drive,short mt_op,int mt_count)
|
| 5365 |
|
|
{
|
| 5366 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5367 |
|
|
idetape_pc_t pc;
|
| 5368 |
|
|
int i,retval;
|
| 5369 |
|
|
|
| 5370 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 5371 |
|
|
if (tape->debug_level >= 1)
|
| 5372 |
|
|
printk(KERN_INFO "ide-tape: Handling MTIOCTOP "
|
| 5373 |
|
|
"ioctl: mt_op=%d, mt_count=%d\n", mt_op, mt_count);
|
| 5374 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 5375 |
|
|
/*
|
| 5376 |
|
|
* Commands which need our pipelined read-ahead stages.
|
| 5377 |
|
|
*/
|
| 5378 |
|
|
switch (mt_op) {
|
| 5379 |
|
|
case MTFSF:
|
| 5380 |
|
|
case MTFSFM:
|
| 5381 |
|
|
case MTBSF:
|
| 5382 |
|
|
case MTBSFM:
|
| 5383 |
|
|
if (!mt_count)
|
| 5384 |
|
|
return (0);
|
| 5385 |
|
|
return (idetape_space_over_filemarks(drive,mt_op,mt_count));
|
| 5386 |
|
|
default:
|
| 5387 |
|
|
break;
|
| 5388 |
|
|
}
|
| 5389 |
|
|
switch (mt_op) {
|
| 5390 |
|
|
case MTWEOF:
|
| 5391 |
|
|
idetape_discard_read_pipeline(drive, 1);
|
| 5392 |
|
|
for (i = 0; i < mt_count; i++) {
|
| 5393 |
|
|
retval = idetape_write_filemark(drive);
|
| 5394 |
|
|
if (retval) return retval;
|
| 5395 |
|
|
}
|
| 5396 |
|
|
return (0);
|
| 5397 |
|
|
case MTREW:
|
| 5398 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5399 |
|
|
if (idetape_rewind_tape(drive))
|
| 5400 |
|
|
return -EIO;
|
| 5401 |
|
|
if (tape->onstream && !tape->raw)
|
| 5402 |
|
|
return idetape_position_tape(drive, OS_DATA_STARTFRAME1, 0, 0);
|
| 5403 |
|
|
return 0;
|
| 5404 |
|
|
case MTLOAD:
|
| 5405 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5406 |
|
|
idetape_create_load_unload_cmd(drive, &pc, IDETAPE_LU_LOAD_MASK);
|
| 5407 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 5408 |
|
|
case MTUNLOAD:
|
| 5409 |
|
|
case MTOFFL:
|
| 5410 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5411 |
|
|
idetape_create_load_unload_cmd(drive, &pc,!IDETAPE_LU_LOAD_MASK);
|
| 5412 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 5413 |
|
|
case MTNOP:
|
| 5414 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5415 |
|
|
return (idetape_flush_tape_buffers(drive));
|
| 5416 |
|
|
case MTRETEN:
|
| 5417 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5418 |
|
|
idetape_create_load_unload_cmd(drive, &pc,IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
|
| 5419 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 5420 |
|
|
case MTEOM:
|
| 5421 |
|
|
if (tape->onstream) {
|
| 5422 |
|
|
#if ONSTREAM_DEBUG
|
| 5423 |
|
|
if (tape->debug_level >= 2)
|
| 5424 |
|
|
printk(KERN_INFO "ide-tape: %s: positioning tape to eod at %d\n", tape->name, tape->eod_frame_addr);
|
| 5425 |
|
|
#endif
|
| 5426 |
|
|
idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
|
| 5427 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0))
|
| 5428 |
|
|
return -EIO;
|
| 5429 |
|
|
if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_EOD)
|
| 5430 |
|
|
return -EIO;
|
| 5431 |
|
|
return 0;
|
| 5432 |
|
|
}
|
| 5433 |
|
|
idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
|
| 5434 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 5435 |
|
|
case MTERASE:
|
| 5436 |
|
|
if (tape->onstream) {
|
| 5437 |
|
|
tape->eod_frame_addr = OS_DATA_STARTFRAME1;
|
| 5438 |
|
|
tape->logical_blk_num = 0;
|
| 5439 |
|
|
tape->first_mark_addr = tape->last_mark_addr = -1;
|
| 5440 |
|
|
idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
|
| 5441 |
|
|
idetape_write_eod(drive);
|
| 5442 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5443 |
|
|
idetape_write_header(drive, 0);
|
| 5444 |
|
|
/*
|
| 5445 |
|
|
* write filler frames to the unused frames...
|
| 5446 |
|
|
* REMOVE WHEN going to LIN4 application type...
|
| 5447 |
|
|
*/
|
| 5448 |
|
|
idetape_write_filler(drive, OS_DATA_STARTFRAME1 - 10, 10);
|
| 5449 |
|
|
idetape_write_filler(drive, OS_DATA_ENDFRAME1, 10);
|
| 5450 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5451 |
|
|
(void) idetape_rewind_tape(drive);
|
| 5452 |
|
|
return 0;
|
| 5453 |
|
|
}
|
| 5454 |
|
|
(void) idetape_rewind_tape(drive);
|
| 5455 |
|
|
idetape_create_erase_cmd(&pc);
|
| 5456 |
|
|
return (idetape_queue_pc_tail(drive, &pc));
|
| 5457 |
|
|
case MTSETBLK:
|
| 5458 |
|
|
if (tape->onstream) {
|
| 5459 |
|
|
if (mt_count != tape->tape_block_size) {
|
| 5460 |
|
|
printk(KERN_INFO "ide-tape: %s: MTSETBLK %d -- only %d bytes block size supported\n", tape->name, mt_count, tape->tape_block_size);
|
| 5461 |
|
|
return -EINVAL;
|
| 5462 |
|
|
}
|
| 5463 |
|
|
return 0;
|
| 5464 |
|
|
}
|
| 5465 |
|
|
if (mt_count) {
|
| 5466 |
|
|
if (mt_count < tape->tape_block_size || mt_count % tape->tape_block_size)
|
| 5467 |
|
|
return -EIO;
|
| 5468 |
|
|
tape->user_bs_factor = mt_count / tape->tape_block_size;
|
| 5469 |
|
|
clear_bit(IDETAPE_DETECT_BS, &tape->flags);
|
| 5470 |
|
|
} else
|
| 5471 |
|
|
set_bit(IDETAPE_DETECT_BS, &tape->flags);
|
| 5472 |
|
|
return 0;
|
| 5473 |
|
|
case MTSEEK:
|
| 5474 |
|
|
if (!tape->onstream || tape->raw) {
|
| 5475 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5476 |
|
|
return idetape_position_tape(drive, mt_count * tape->user_bs_factor, tape->partition, 0);
|
| 5477 |
|
|
}
|
| 5478 |
|
|
return idetape_seek_logical_blk(drive, mt_count);
|
| 5479 |
|
|
case MTSETPART:
|
| 5480 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5481 |
|
|
if (tape->onstream)
|
| 5482 |
|
|
return -EIO;
|
| 5483 |
|
|
return (idetape_position_tape(drive, 0, mt_count, 0));
|
| 5484 |
|
|
case MTFSR:
|
| 5485 |
|
|
case MTBSR:
|
| 5486 |
|
|
if (tape->onstream) {
|
| 5487 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0))
|
| 5488 |
|
|
return -EIO;
|
| 5489 |
|
|
if (mt_op == MTFSR)
|
| 5490 |
|
|
return idetape_seek_logical_blk(drive, tape->logical_blk_num + mt_count);
|
| 5491 |
|
|
else {
|
| 5492 |
|
|
idetape_discard_read_pipeline(drive, 0);
|
| 5493 |
|
|
return idetape_seek_logical_blk(drive, tape->logical_blk_num - mt_count);
|
| 5494 |
|
|
}
|
| 5495 |
|
|
}
|
| 5496 |
|
|
case MTLOCK:
|
| 5497 |
|
|
if (!idetape_create_prevent_cmd(drive, &pc, 1))
|
| 5498 |
|
|
return 0;
|
| 5499 |
|
|
retval = idetape_queue_pc_tail(drive, &pc);
|
| 5500 |
|
|
if (retval) return retval;
|
| 5501 |
|
|
tape->door_locked = DOOR_EXPLICITLY_LOCKED;
|
| 5502 |
|
|
return 0;
|
| 5503 |
|
|
case MTUNLOCK:
|
| 5504 |
|
|
if (!idetape_create_prevent_cmd(drive, &pc, 0))
|
| 5505 |
|
|
return 0;
|
| 5506 |
|
|
retval = idetape_queue_pc_tail(drive, &pc);
|
| 5507 |
|
|
if (retval) return retval;
|
| 5508 |
|
|
tape->door_locked = DOOR_UNLOCKED;
|
| 5509 |
|
|
return 0;
|
| 5510 |
|
|
default:
|
| 5511 |
|
|
printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",mt_op);
|
| 5512 |
|
|
return (-EIO);
|
| 5513 |
|
|
}
|
| 5514 |
|
|
}
|
| 5515 |
|
|
|
| 5516 |
|
|
/*
|
| 5517 |
|
|
* Our character device ioctls.
|
| 5518 |
|
|
*
|
| 5519 |
|
|
* General mtio.h magnetic io commands are supported here, and not in
|
| 5520 |
|
|
* the corresponding block interface.
|
| 5521 |
|
|
*
|
| 5522 |
|
|
* The following ioctls are supported:
|
| 5523 |
|
|
*
|
| 5524 |
|
|
* MTIOCTOP - Refer to idetape_mtioctop for detailed description.
|
| 5525 |
|
|
*
|
| 5526 |
|
|
* MTIOCGET - The mt_dsreg field in the returned mtget structure
|
| 5527 |
|
|
* will be set to (user block size in bytes <<
|
| 5528 |
|
|
* MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK.
|
| 5529 |
|
|
*
|
| 5530 |
|
|
* The mt_blkno is set to the current user block number.
|
| 5531 |
|
|
* The other mtget fields are not supported.
|
| 5532 |
|
|
*
|
| 5533 |
|
|
* MTIOCPOS - The current tape "block position" is returned. We
|
| 5534 |
|
|
* assume that each block contains user_block_size
|
| 5535 |
|
|
* bytes.
|
| 5536 |
|
|
*
|
| 5537 |
|
|
* Our own ide-tape ioctls are supported on both interfaces.
|
| 5538 |
|
|
*/
|
| 5539 |
|
|
static int idetape_chrdev_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
|
| 5540 |
|
|
{
|
| 5541 |
|
|
ide_drive_t *drive = get_drive_ptr(inode->i_rdev);
|
| 5542 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5543 |
|
|
struct mtop mtop;
|
| 5544 |
|
|
struct mtget mtget;
|
| 5545 |
|
|
struct mtpos mtpos;
|
| 5546 |
|
|
int block_offset = 0, position = tape->first_frame_position;
|
| 5547 |
|
|
|
| 5548 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 5549 |
|
|
if (tape->debug_level >= 3)
|
| 5550 |
|
|
printk(KERN_INFO "ide-tape: Reached idetape_chrdev_ioctl, cmd=%u\n",cmd);
|
| 5551 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 5552 |
|
|
|
| 5553 |
|
|
tape->restart_speed_control_req = 1;
|
| 5554 |
|
|
if (tape->chrdev_direction == idetape_direction_write) {
|
| 5555 |
|
|
idetape_empty_write_pipeline(drive);
|
| 5556 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5557 |
|
|
}
|
| 5558 |
|
|
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
|
| 5559 |
|
|
block_offset = idetape_pipeline_size(drive) / (tape->tape_block_size * tape->user_bs_factor);
|
| 5560 |
|
|
if ((position = idetape_read_position(drive)) < 0)
|
| 5561 |
|
|
return -EIO;
|
| 5562 |
|
|
}
|
| 5563 |
|
|
switch (cmd) {
|
| 5564 |
|
|
case MTIOCTOP:
|
| 5565 |
|
|
if (copy_from_user((char *) &mtop, (char *) arg, sizeof (struct mtop)))
|
| 5566 |
|
|
return -EFAULT;
|
| 5567 |
|
|
return (idetape_mtioctop(drive,mtop.mt_op,mtop.mt_count));
|
| 5568 |
|
|
case MTIOCGET:
|
| 5569 |
|
|
memset(&mtget, 0, sizeof (struct mtget));
|
| 5570 |
|
|
mtget.mt_type = MT_ISSCSI2;
|
| 5571 |
|
|
if (!tape->onstream || tape->raw) {
|
| 5572 |
|
|
mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
|
| 5573 |
|
|
} else {
|
| 5574 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0))
|
| 5575 |
|
|
mtget.mt_blkno = -1;
|
| 5576 |
|
|
else
|
| 5577 |
|
|
mtget.mt_blkno = tape->logical_blk_num;
|
| 5578 |
|
|
}
|
| 5579 |
|
|
mtget.mt_dsreg = ((tape->tape_block_size * tape->user_bs_factor) << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
|
| 5580 |
|
|
if (tape->onstream) {
|
| 5581 |
|
|
mtget.mt_gstat |= GMT_ONLINE(0xffffffff);
|
| 5582 |
|
|
if (tape->first_stage && tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD)
|
| 5583 |
|
|
mtget.mt_gstat |= GMT_EOD(0xffffffff);
|
| 5584 |
|
|
if (position <= OS_DATA_STARTFRAME1)
|
| 5585 |
|
|
mtget.mt_gstat |= GMT_BOT(0xffffffff);
|
| 5586 |
|
|
}
|
| 5587 |
|
|
if (copy_to_user ((char *) arg,(char *) &mtget, sizeof (struct mtget)))
|
| 5588 |
|
|
return -EFAULT;
|
| 5589 |
|
|
return 0;
|
| 5590 |
|
|
case MTIOCPOS:
|
| 5591 |
|
|
if (tape->onstream && !tape->raw) {
|
| 5592 |
|
|
if (!idetape_get_logical_blk(drive, -1, 10, 0))
|
| 5593 |
|
|
return -EIO;
|
| 5594 |
|
|
mtpos.mt_blkno = tape->logical_blk_num;
|
| 5595 |
|
|
} else
|
| 5596 |
|
|
mtpos.mt_blkno = position / tape->user_bs_factor - block_offset;
|
| 5597 |
|
|
if (copy_to_user ((char *) arg,(char *) &mtpos, sizeof (struct mtpos)))
|
| 5598 |
|
|
return -EFAULT;
|
| 5599 |
|
|
return 0;
|
| 5600 |
|
|
default:
|
| 5601 |
|
|
if (tape->chrdev_direction == idetape_direction_read)
|
| 5602 |
|
|
idetape_discard_read_pipeline(drive, 1);
|
| 5603 |
|
|
return (idetape_blkdev_ioctl(drive,inode,file,cmd,arg));
|
| 5604 |
|
|
}
|
| 5605 |
|
|
}
|
| 5606 |
|
|
|
| 5607 |
|
|
static int __idetape_analyze_headers (ide_drive_t *drive, int block)
|
| 5608 |
|
|
{
|
| 5609 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5610 |
|
|
idetape_stage_t *stage;
|
| 5611 |
|
|
os_header_t *header;
|
| 5612 |
|
|
os_aux_t *aux;
|
| 5613 |
|
|
|
| 5614 |
|
|
if (!tape->onstream || tape->raw) {
|
| 5615 |
|
|
tape->header_ok = tape->linux_media = 1;
|
| 5616 |
|
|
return 1;
|
| 5617 |
|
|
}
|
| 5618 |
|
|
tape->header_ok = tape->linux_media = 0;
|
| 5619 |
|
|
tape->update_frame_cntr = 0;
|
| 5620 |
|
|
tape->wrt_pass_cntr = 0;
|
| 5621 |
|
|
tape->eod_frame_addr = OS_DATA_STARTFRAME1;
|
| 5622 |
|
|
tape->first_mark_addr = tape->last_mark_addr = -1;
|
| 5623 |
|
|
stage = __idetape_kmalloc_stage(tape, 0, 0);
|
| 5624 |
|
|
if (stage == NULL)
|
| 5625 |
|
|
return 0;
|
| 5626 |
|
|
#if ONSTREAM_DEBUG
|
| 5627 |
|
|
if (tape->debug_level >= 2)
|
| 5628 |
|
|
printk(KERN_INFO "ide-tape: %s: reading header\n", tape->name);
|
| 5629 |
|
|
#endif
|
| 5630 |
|
|
idetape_position_tape(drive, block, 0, 0);
|
| 5631 |
|
|
if (!idetape_queue_rw_tail(drive, IDETAPE_READ_RQ, 1, stage->bh)) {
|
| 5632 |
|
|
printk(KERN_INFO "ide-tape: %s: couldn't read header frame\n",
|
| 5633 |
|
|
tape->name);
|
| 5634 |
|
|
__idetape_kfree_stage(stage);
|
| 5635 |
|
|
return 0;
|
| 5636 |
|
|
}
|
| 5637 |
|
|
header = (os_header_t *) stage->bh->b_data;
|
| 5638 |
|
|
aux = stage->aux;
|
| 5639 |
|
|
if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0) {
|
| 5640 |
|
|
printk(KERN_INFO "ide-tape: %s: invalid header identification string\n", tape->name);
|
| 5641 |
|
|
__idetape_kfree_stage(stage);
|
| 5642 |
|
|
return 0;
|
| 5643 |
|
|
}
|
| 5644 |
|
|
if (header->major_rev != 1 || (header->minor_rev > OS_ADR_MINREV))
|
| 5645 |
|
|
printk(KERN_INFO "ide-tape: warning: revision %d.%d detected (up to 1.%d supported)\n", header->major_rev, header->minor_rev, OS_ADR_MINREV);
|
| 5646 |
|
|
if (header->par_num != 1)
|
| 5647 |
|
|
printk(KERN_INFO "ide-tape: warning: %d partitions defined, only one supported\n", header->par_num);
|
| 5648 |
|
|
tape->wrt_pass_cntr = ntohs(header->partition.wrt_pass_cntr);
|
| 5649 |
|
|
tape->eod_frame_addr = ntohl(header->partition.eod_frame_addr);
|
| 5650 |
|
|
tape->filemark_cnt = ntohl(aux->filemark_cnt);
|
| 5651 |
|
|
tape->first_mark_addr = ntohl(aux->next_mark_addr);
|
| 5652 |
|
|
tape->last_mark_addr = ntohl(aux->last_mark_addr);
|
| 5653 |
|
|
tape->update_frame_cntr = ntohl(aux->update_frame_cntr);
|
| 5654 |
|
|
memcpy(tape->application_sig, aux->application_sig, 4);
|
| 5655 |
|
|
tape->application_sig[4] = 0;
|
| 5656 |
|
|
if (memcmp(tape->application_sig, "LIN", 3) == 0) {
|
| 5657 |
|
|
tape->linux_media = 1;
|
| 5658 |
|
|
tape->linux_media_version = tape->application_sig[3] - '0';
|
| 5659 |
|
|
if (tape->linux_media_version != 3)
|
| 5660 |
|
|
printk(KERN_INFO "ide-tape: %s: Linux media version "
|
| 5661 |
|
|
"%d detected (current 3)\n",
|
| 5662 |
|
|
tape->name, tape->linux_media_version);
|
| 5663 |
|
|
} else {
|
| 5664 |
|
|
printk(KERN_INFO "ide-tape: %s: non Linux media detected "
|
| 5665 |
|
|
"(%s)\n", tape->name, tape->application_sig);
|
| 5666 |
|
|
tape->linux_media = 0;
|
| 5667 |
|
|
}
|
| 5668 |
|
|
#if ONSTREAM_DEBUG
|
| 5669 |
|
|
if (tape->debug_level >= 2)
|
| 5670 |
|
|
printk(KERN_INFO "ide-tape: %s: detected write pass "
|
| 5671 |
|
|
"counter %d, eod frame addr %d\n", tape->name,
|
| 5672 |
|
|
tape->wrt_pass_cntr, tape->eod_frame_addr);
|
| 5673 |
|
|
#endif
|
| 5674 |
|
|
__idetape_kfree_stage(stage);
|
| 5675 |
|
|
return 1;
|
| 5676 |
|
|
}
|
| 5677 |
|
|
|
| 5678 |
|
|
static int idetape_analyze_headers (ide_drive_t *drive)
|
| 5679 |
|
|
{
|
| 5680 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5681 |
|
|
int position, block;
|
| 5682 |
|
|
|
| 5683 |
|
|
if (!tape->onstream || tape->raw) {
|
| 5684 |
|
|
tape->header_ok = tape->linux_media = 1;
|
| 5685 |
|
|
return 1;
|
| 5686 |
|
|
}
|
| 5687 |
|
|
tape->header_ok = tape->linux_media = 0;
|
| 5688 |
|
|
position = idetape_read_position(drive);
|
| 5689 |
|
|
for (block = 5; block < 10; block++)
|
| 5690 |
|
|
if (__idetape_analyze_headers(drive, block))
|
| 5691 |
|
|
goto ok;
|
| 5692 |
|
|
for (block = 0xbae; block < 0xbb3; block++) /* 2990 - 2994 */
|
| 5693 |
|
|
if (__idetape_analyze_headers(drive, block))
|
| 5694 |
|
|
goto ok;
|
| 5695 |
|
|
printk(KERN_ERR "ide-tape: %s: failed to find valid ADRL header\n",
|
| 5696 |
|
|
tape->name);
|
| 5697 |
|
|
return 0;
|
| 5698 |
|
|
ok:
|
| 5699 |
|
|
if (position < OS_DATA_STARTFRAME1)
|
| 5700 |
|
|
position = OS_DATA_STARTFRAME1;
|
| 5701 |
|
|
idetape_position_tape(drive, position, 0, 0);
|
| 5702 |
|
|
tape->header_ok = 1;
|
| 5703 |
|
|
return 1;
|
| 5704 |
|
|
}
|
| 5705 |
|
|
|
| 5706 |
|
|
/*
|
| 5707 |
|
|
* Our character device open function.
|
| 5708 |
|
|
*/
|
| 5709 |
|
|
static int idetape_chrdev_open (struct inode *inode, struct file *filp)
|
| 5710 |
|
|
{
|
| 5711 |
|
|
ide_drive_t *drive;
|
| 5712 |
|
|
idetape_tape_t *tape;
|
| 5713 |
|
|
idetape_pc_t pc;
|
| 5714 |
|
|
unsigned int minor = MINOR(inode->i_rdev);
|
| 5715 |
|
|
|
| 5716 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 5717 |
|
|
printk (KERN_INFO "ide-tape: Reached idetape_chrdev_open\n");
|
| 5718 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 5719 |
|
|
|
| 5720 |
|
|
if ((drive = get_drive_ptr(inode->i_rdev)) == NULL)
|
| 5721 |
|
|
return -ENXIO;
|
| 5722 |
|
|
tape = drive->driver_data;
|
| 5723 |
|
|
|
| 5724 |
|
|
if (test_and_set_bit(IDETAPE_BUSY, &tape->flags))
|
| 5725 |
|
|
return -EBUSY;
|
| 5726 |
|
|
MOD_INC_USE_COUNT;
|
| 5727 |
|
|
if (!tape->onstream) {
|
| 5728 |
|
|
idetape_read_position(drive);
|
| 5729 |
|
|
if (!test_bit(IDETAPE_ADDRESS_VALID, &tape->flags))
|
| 5730 |
|
|
(void) idetape_rewind_tape(drive);
|
| 5731 |
|
|
} else {
|
| 5732 |
|
|
if (minor & 64) {
|
| 5733 |
|
|
tape->tape_block_size = tape->stage_size = 32768 + 512;
|
| 5734 |
|
|
tape->raw = 1;
|
| 5735 |
|
|
} else {
|
| 5736 |
|
|
tape->tape_block_size = tape->stage_size = 32768;
|
| 5737 |
|
|
tape->raw = 0;
|
| 5738 |
|
|
}
|
| 5739 |
|
|
idetape_onstream_mode_sense_tape_parameter_page(drive, tape->debug_level);
|
| 5740 |
|
|
}
|
| 5741 |
|
|
if (idetape_wait_ready(drive, 60 * HZ)) {
|
| 5742 |
|
|
clear_bit(IDETAPE_BUSY, &tape->flags);
|
| 5743 |
|
|
printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
|
| 5744 |
|
|
MOD_DEC_USE_COUNT;
|
| 5745 |
|
|
return -EBUSY;
|
| 5746 |
|
|
}
|
| 5747 |
|
|
if (tape->onstream)
|
| 5748 |
|
|
idetape_read_position(drive);
|
| 5749 |
|
|
MOD_DEC_USE_COUNT;
|
| 5750 |
|
|
if (tape->chrdev_direction != idetape_direction_read)
|
| 5751 |
|
|
clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
|
| 5752 |
|
|
|
| 5753 |
|
|
if (tape->chrdev_direction == idetape_direction_none) {
|
| 5754 |
|
|
MOD_INC_USE_COUNT;
|
| 5755 |
|
|
if (idetape_create_prevent_cmd(drive, &pc, 1)) {
|
| 5756 |
|
|
if (!idetape_queue_pc_tail(drive, &pc)) {
|
| 5757 |
|
|
if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
|
| 5758 |
|
|
tape->door_locked = DOOR_LOCKED;
|
| 5759 |
|
|
}
|
| 5760 |
|
|
}
|
| 5761 |
|
|
idetape_analyze_headers(drive);
|
| 5762 |
|
|
}
|
| 5763 |
|
|
tape->max_frames = tape->cur_frames = tape->req_buffer_fill = 0;
|
| 5764 |
|
|
idetape_restart_speed_control(drive);
|
| 5765 |
|
|
tape->restart_speed_control_req = 0;
|
| 5766 |
|
|
return 0;
|
| 5767 |
|
|
}
|
| 5768 |
|
|
|
| 5769 |
|
|
static void idetape_write_release (struct inode *inode)
|
| 5770 |
|
|
{
|
| 5771 |
|
|
ide_drive_t *drive = get_drive_ptr(inode->i_rdev);
|
| 5772 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 5773 |
|
|
unsigned int minor = MINOR(inode->i_rdev);
|
| 5774 |
|
|
|
| 5775 |
|
|
idetape_empty_write_pipeline(drive);
|
| 5776 |
|
|
tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
|
| 5777 |
|
|
if (tape->merge_stage != NULL) {
|
| 5778 |
|
|
idetape_pad_zeros(drive, tape->tape_block_size * (tape->user_bs_factor - 1));
|
| 5779 |
|
|
__idetape_kfree_stage(tape->merge_stage);
|
| 5780 |
|
|
tape->merge_stage = NULL;
|
| 5781 |
|
|
}
|
| 5782 |
|
|
idetape_write_filemark(drive);
|
| 5783 |
|
|
idetape_write_eod(drive);
|
| 5784 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5785 |
|
|
idetape_write_header(drive, minor >= 128);
|
| 5786 |
|
|
idetape_flush_tape_buffers(drive);
|
| 5787 |
|
|
|
| 5788 |
|
|
return;
|
| 5789 |
|
|
}
|
| 5790 |
|
|
|
| 5791 |
|
|
/*
|
| 5792 |
|
|
* Our character device release function.
|
| 5793 |
|
|
*/
|
| 5794 |
|
|
static int idetape_chrdev_release (struct inode *inode, struct file *filp)
|
| 5795 |
|
|
{
|
| 5796 |
|
|
ide_drive_t *drive = get_drive_ptr(inode->i_rdev);
|
| 5797 |
|
|
idetape_tape_t *tape;
|
| 5798 |
|
|
idetape_pc_t pc;
|
| 5799 |
|
|
unsigned int minor = MINOR(inode->i_rdev);
|
| 5800 |
|
|
|
| 5801 |
|
|
lock_kernel();
|
| 5802 |
|
|
tape = drive->driver_data;
|
| 5803 |
|
|
#if IDETAPE_DEBUG_LOG
|
| 5804 |
|
|
if (tape->debug_level >= 3)
|
| 5805 |
|
|
printk(KERN_INFO "ide-tape: Reached idetape_chrdev_release\n");
|
| 5806 |
|
|
#endif /* IDETAPE_DEBUG_LOG */
|
| 5807 |
|
|
|
| 5808 |
|
|
if (tape->chrdev_direction == idetape_direction_write) {
|
| 5809 |
|
|
idetape_write_release(inode);
|
| 5810 |
|
|
}
|
| 5811 |
|
|
if (tape->chrdev_direction == idetape_direction_read) {
|
| 5812 |
|
|
if (minor < 128)
|
| 5813 |
|
|
idetape_discard_read_pipeline(drive, 1);
|
| 5814 |
|
|
else
|
| 5815 |
|
|
idetape_wait_for_pipeline(drive);
|
| 5816 |
|
|
}
|
| 5817 |
|
|
if (tape->cache_stage != NULL) {
|
| 5818 |
|
|
__idetape_kfree_stage(tape->cache_stage);
|
| 5819 |
|
|
tape->cache_stage = NULL;
|
| 5820 |
|
|
}
|
| 5821 |
|
|
if (minor < 128)
|
| 5822 |
|
|
(void) idetape_rewind_tape(drive);
|
| 5823 |
|
|
if (tape->chrdev_direction == idetape_direction_none) {
|
| 5824 |
|
|
if (tape->door_locked == DOOR_LOCKED) {
|
| 5825 |
|
|
if (idetape_create_prevent_cmd(drive, &pc, 0)) {
|
| 5826 |
|
|
if (!idetape_queue_pc_tail(drive, &pc))
|
| 5827 |
|
|
tape->door_locked = DOOR_UNLOCKED;
|
| 5828 |
|
|
}
|
| 5829 |
|
|
}
|
| 5830 |
|
|
MOD_DEC_USE_COUNT;
|
| 5831 |
|
|
}
|
| 5832 |
|
|
clear_bit(IDETAPE_BUSY, &tape->flags);
|
| 5833 |
|
|
unlock_kernel();
|
| 5834 |
|
|
return 0;
|
| 5835 |
|
|
}
|
| 5836 |
|
|
|
| 5837 |
|
|
/*
|
| 5838 |
|
|
* idetape_identify_device is called to check the contents of the
|
| 5839 |
|
|
* ATAPI IDENTIFY command results. We return:
|
| 5840 |
|
|
*
|
| 5841 |
|
|
* 1 If the tape can be supported by us, based on the information
|
| 5842 |
|
|
* we have so far.
|
| 5843 |
|
|
*
|
| 5844 |
|
|
* 0 If this tape driver is not currently supported by us.
|
| 5845 |
|
|
*/
|
| 5846 |
|
|
static int idetape_identify_device (ide_drive_t *drive)
|
| 5847 |
|
|
{
|
| 5848 |
|
|
struct idetape_id_gcw gcw;
|
| 5849 |
|
|
struct hd_driveid *id = drive->id;
|
| 5850 |
|
|
#if IDETAPE_DEBUG_INFO
|
| 5851 |
|
|
unsigned short mask,i;
|
| 5852 |
|
|
#endif /* IDETAPE_DEBUG_INFO */
|
| 5853 |
|
|
|
| 5854 |
|
|
if(drive->id_read == 0)
|
| 5855 |
|
|
return 1;
|
| 5856 |
|
|
|
| 5857 |
|
|
*((unsigned short *) &gcw) = id->config;
|
| 5858 |
|
|
|
| 5859 |
|
|
#if IDETAPE_DEBUG_INFO
|
| 5860 |
|
|
printk(KERN_INFO "ide-tape: Dumping ATAPI Identify Device tape parameters\n");
|
| 5861 |
|
|
printk(KERN_INFO "ide-tape: Protocol Type: ");
|
| 5862 |
|
|
switch (gcw.protocol) {
|
| 5863 |
|
|
case 0: case 1: printk("ATA\n");break;
|
| 5864 |
|
|
case 2: printk("ATAPI\n");break;
|
| 5865 |
|
|
case 3: printk("Reserved (Unknown to ide-tape)\n");break;
|
| 5866 |
|
|
}
|
| 5867 |
|
|
printk(KERN_INFO "ide-tape: Device Type: %x - ",gcw.device_type);
|
| 5868 |
|
|
switch (gcw.device_type) {
|
| 5869 |
|
|
case 0: printk("Direct-access Device\n");break;
|
| 5870 |
|
|
case 1: printk("Streaming Tape Device\n");break;
|
| 5871 |
|
|
case 2: case 3: case 4: printk("Reserved\n");break;
|
| 5872 |
|
|
case 5: printk("CD-ROM Device\n");break;
|
| 5873 |
|
|
case 6: printk("Reserved\n");
|
| 5874 |
|
|
case 7: printk("Optical memory Device\n");break;
|
| 5875 |
|
|
case 0x1f: printk("Unknown or no Device type\n");break;
|
| 5876 |
|
|
default: printk("Reserved\n");
|
| 5877 |
|
|
}
|
| 5878 |
|
|
printk(KERN_INFO "ide-tape: Removable: %s",gcw.removable ? "Yes\n":"No\n");
|
| 5879 |
|
|
printk(KERN_INFO "ide-tape: Command Packet DRQ Type: ");
|
| 5880 |
|
|
switch (gcw.drq_type) {
|
| 5881 |
|
|
case 0: printk("Microprocessor DRQ\n");break;
|
| 5882 |
|
|
case 1: printk("Interrupt DRQ\n");break;
|
| 5883 |
|
|
case 2: printk("Accelerated DRQ\n");break;
|
| 5884 |
|
|
case 3: printk("Reserved\n");break;
|
| 5885 |
|
|
}
|
| 5886 |
|
|
printk(KERN_INFO "ide-tape: Command Packet Size: ");
|
| 5887 |
|
|
switch (gcw.packet_size) {
|
| 5888 |
|
|
case 0: printk("12 bytes\n");break;
|
| 5889 |
|
|
case 1: printk("16 bytes\n");break;
|
| 5890 |
|
|
default: printk("Reserved\n");break;
|
| 5891 |
|
|
}
|
| 5892 |
|
|
printk(KERN_INFO "ide-tape: Model: %.40s\n",id->model);
|
| 5893 |
|
|
printk(KERN_INFO "ide-tape: Firmware Revision: %.8s\n",id->fw_rev);
|
| 5894 |
|
|
printk(KERN_INFO "ide-tape: Serial Number: %.20s\n",id->serial_no);
|
| 5895 |
|
|
printk(KERN_INFO "ide-tape: Write buffer size: %d bytes\n",id->buf_size*512);
|
| 5896 |
|
|
printk(KERN_INFO "ide-tape: DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
|
| 5897 |
|
|
printk(KERN_INFO "ide-tape: LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
|
| 5898 |
|
|
printk(KERN_INFO "ide-tape: IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
|
| 5899 |
|
|
printk(KERN_INFO "ide-tape: IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
|
| 5900 |
|
|
printk(KERN_INFO "ide-tape: ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
|
| 5901 |
|
|
printk(KERN_INFO "ide-tape: PIO Cycle Timing Category: %d\n",id->tPIO);
|
| 5902 |
|
|
printk(KERN_INFO "ide-tape: DMA Cycle Timing Category: %d\n",id->tDMA);
|
| 5903 |
|
|
printk(KERN_INFO "ide-tape: Single Word DMA supported modes: ");
|
| 5904 |
|
|
for (i=0,mask=1;i<8;i++,mask=mask << 1) {
|
| 5905 |
|
|
if (id->dma_1word & mask)
|
| 5906 |
|
|
printk("%d ",i);
|
| 5907 |
|
|
if (id->dma_1word & (mask << 8))
|
| 5908 |
|
|
printk("(active) ");
|
| 5909 |
|
|
}
|
| 5910 |
|
|
printk("\n");
|
| 5911 |
|
|
printk(KERN_INFO "ide-tape: Multi Word DMA supported modes: ");
|
| 5912 |
|
|
for (i=0,mask=1;i<8;i++,mask=mask << 1) {
|
| 5913 |
|
|
if (id->dma_mword & mask)
|
| 5914 |
|
|
printk("%d ",i);
|
| 5915 |
|
|
if (id->dma_mword & (mask << 8))
|
| 5916 |
|
|
printk("(active) ");
|
| 5917 |
|
|
}
|
| 5918 |
|
|
printk("\n");
|
| 5919 |
|
|
if (id->field_valid & 0x0002) {
|
| 5920 |
|
|
printk(KERN_INFO "ide-tape: Enhanced PIO Modes: %s\n",id->eide_pio_modes & 1 ? "Mode 3":"None");
|
| 5921 |
|
|
printk(KERN_INFO "ide-tape: Minimum Multi-word DMA cycle per word: ");
|
| 5922 |
|
|
if (id->eide_dma_min == 0)
|
| 5923 |
|
|
printk("Not supported\n");
|
| 5924 |
|
|
else
|
| 5925 |
|
|
printk("%d ns\n",id->eide_dma_min);
|
| 5926 |
|
|
|
| 5927 |
|
|
printk(KERN_INFO "ide-tape: Manufacturer\'s Recommended Multi-word cycle: ");
|
| 5928 |
|
|
if (id->eide_dma_time == 0)
|
| 5929 |
|
|
printk("Not supported\n");
|
| 5930 |
|
|
else
|
| 5931 |
|
|
printk("%d ns\n",id->eide_dma_time);
|
| 5932 |
|
|
|
| 5933 |
|
|
printk(KERN_INFO "ide-tape: Minimum PIO cycle without IORDY: ");
|
| 5934 |
|
|
if (id->eide_pio == 0)
|
| 5935 |
|
|
printk("Not supported\n");
|
| 5936 |
|
|
else
|
| 5937 |
|
|
printk("%d ns\n",id->eide_pio);
|
| 5938 |
|
|
|
| 5939 |
|
|
printk(KERN_INFO "ide-tape: Minimum PIO cycle with IORDY: ");
|
| 5940 |
|
|
if (id->eide_pio_iordy == 0)
|
| 5941 |
|
|
printk("Not supported\n");
|
| 5942 |
|
|
else
|
| 5943 |
|
|
printk("%d ns\n",id->eide_pio_iordy);
|
| 5944 |
|
|
|
| 5945 |
|
|
} else
|
| 5946 |
|
|
printk(KERN_INFO "ide-tape: According to the device, fields 64-70 are not valid.\n");
|
| 5947 |
|
|
#endif /* IDETAPE_DEBUG_INFO */
|
| 5948 |
|
|
|
| 5949 |
|
|
/* Check that we can support this device */
|
| 5950 |
|
|
|
| 5951 |
|
|
if (gcw.protocol !=2 )
|
| 5952 |
|
|
printk(KERN_ERR "ide-tape: Protocol is not ATAPI\n");
|
| 5953 |
|
|
else if (gcw.device_type != 1)
|
| 5954 |
|
|
printk(KERN_ERR "ide-tape: Device type is not set to tape\n");
|
| 5955 |
|
|
else if (!gcw.removable)
|
| 5956 |
|
|
printk(KERN_ERR "ide-tape: The removable flag is not set\n");
|
| 5957 |
|
|
else if (gcw.packet_size != 0) {
|
| 5958 |
|
|
printk(KERN_ERR "ide-tape: Packet size is not 12 bytes long\n");
|
| 5959 |
|
|
if (gcw.packet_size == 1)
|
| 5960 |
|
|
printk(KERN_ERR "ide-tape: Sorry, padding to 16 bytes is still not supported\n");
|
| 5961 |
|
|
} else
|
| 5962 |
|
|
return 1;
|
| 5963 |
|
|
return 0;
|
| 5964 |
|
|
}
|
| 5965 |
|
|
|
| 5966 |
|
|
/*
|
| 5967 |
|
|
* Notify vendor ID to the OnStream tape drive
|
| 5968 |
|
|
*/
|
| 5969 |
|
|
static void idetape_onstream_set_vendor (ide_drive_t *drive, char *vendor)
|
| 5970 |
|
|
{
|
| 5971 |
|
|
idetape_pc_t pc;
|
| 5972 |
|
|
idetape_mode_parameter_header_t *header;
|
| 5973 |
|
|
|
| 5974 |
|
|
idetape_create_mode_select_cmd(&pc, sizeof(*header) + 8);
|
| 5975 |
|
|
pc.buffer[0] = 3 + 8; /* Mode Data Length */
|
| 5976 |
|
|
pc.buffer[1] = 0; /* Medium Type - ignoring */
|
| 5977 |
|
|
pc.buffer[2] = 0; /* Reserved */
|
| 5978 |
|
|
pc.buffer[3] = 0; /* Block Descriptor Length */
|
| 5979 |
|
|
pc.buffer[4 + 0] = 0x36 | (1 << 7);
|
| 5980 |
|
|
pc.buffer[4 + 1] = 6;
|
| 5981 |
|
|
pc.buffer[4 + 2] = vendor[0];
|
| 5982 |
|
|
pc.buffer[4 + 3] = vendor[1];
|
| 5983 |
|
|
pc.buffer[4 + 4] = vendor[2];
|
| 5984 |
|
|
pc.buffer[4 + 5] = vendor[3];
|
| 5985 |
|
|
pc.buffer[4 + 6] = 0;
|
| 5986 |
|
|
pc.buffer[4 + 7] = 0;
|
| 5987 |
|
|
if (idetape_queue_pc_tail(drive, &pc))
|
| 5988 |
|
|
printk(KERN_ERR "ide-tape: Couldn't set vendor name to %s\n", vendor);
|
| 5989 |
|
|
|
| 5990 |
|
|
}
|
| 5991 |
|
|
|
| 5992 |
|
|
/*
|
| 5993 |
|
|
* Various unused OnStream commands
|
| 5994 |
|
|
*/
|
| 5995 |
|
|
#if ONSTREAM_DEBUG
|
| 5996 |
|
|
static void idetape_onstream_set_retries (ide_drive_t *drive, int retries)
|
| 5997 |
|
|
{
|
| 5998 |
|
|
idetape_pc_t pc;
|
| 5999 |
|
|
|
| 6000 |
|
|
idetape_create_mode_select_cmd(&pc, sizeof(idetape_mode_parameter_header_t) + 4);
|
| 6001 |
|
|
pc.buffer[0] = 3 + 4;
|
| 6002 |
|
|
pc.buffer[1] = 0; /* Medium Type - ignoring */
|
| 6003 |
|
|
pc.buffer[2] = 0; /* Reserved */
|
| 6004 |
|
|
pc.buffer[3] = 0; /* Block Descriptor Length */
|
| 6005 |
|
|
pc.buffer[4 + 0] = 0x2f | (1 << 7);
|
| 6006 |
|
|
pc.buffer[4 + 1] = 2;
|
| 6007 |
|
|
pc.buffer[4 + 2] = 4;
|
| 6008 |
|
|
pc.buffer[4 + 3] = retries;
|
| 6009 |
|
|
if (idetape_queue_pc_tail(drive, &pc))
|
| 6010 |
|
|
printk(KERN_ERR "ide-tape: Couldn't set retries to %d\n", retries);
|
| 6011 |
|
|
}
|
| 6012 |
|
|
#endif
|
| 6013 |
|
|
|
| 6014 |
|
|
/*
|
| 6015 |
|
|
* Configure 32.5KB block size.
|
| 6016 |
|
|
*/
|
| 6017 |
|
|
static void idetape_onstream_configure_block_size (ide_drive_t *drive)
|
| 6018 |
|
|
{
|
| 6019 |
|
|
idetape_pc_t pc;
|
| 6020 |
|
|
idetape_mode_parameter_header_t *header;
|
| 6021 |
|
|
idetape_block_size_page_t *bs;
|
| 6022 |
|
|
|
| 6023 |
|
|
/*
|
| 6024 |
|
|
* Get the current block size from the block size mode page
|
| 6025 |
|
|
*/
|
| 6026 |
|
|
idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_SIZE_PAGE);
|
| 6027 |
|
|
if (idetape_queue_pc_tail(drive, &pc))
|
| 6028 |
|
|
printk(KERN_ERR "ide-tape: can't get tape block size mode page\n");
|
| 6029 |
|
|
header = (idetape_mode_parameter_header_t *) pc.buffer;
|
| 6030 |
|
|
bs = (idetape_block_size_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
|
| 6031 |
|
|
|
| 6032 |
|
|
#if IDETAPE_DEBUG_INFO
|
| 6033 |
|
|
printk(KERN_INFO "ide-tape: 32KB play back: %s\n", bs->play32 ? "Yes" : "No");
|
| 6034 |
|
|
printk(KERN_INFO "ide-tape: 32.5KB play back: %s\n", bs->play32_5 ? "Yes" : "No");
|
| 6035 |
|
|
printk(KERN_INFO "ide-tape: 32KB record: %s\n", bs->record32 ? "Yes" : "No");
|
| 6036 |
|
|
printk(KERN_INFO "ide-tape: 32.5KB record: %s\n", bs->record32_5 ? "Yes" : "No");
|
| 6037 |
|
|
#endif /* IDETAPE_DEBUG_INFO */
|
| 6038 |
|
|
|
| 6039 |
|
|
/*
|
| 6040 |
|
|
* Configure default auto columns mode, 32.5KB block size
|
| 6041 |
|
|
*/
|
| 6042 |
|
|
bs->one = 1;
|
| 6043 |
|
|
bs->play32 = 0;
|
| 6044 |
|
|
bs->play32_5 = 1;
|
| 6045 |
|
|
bs->record32 = 0;
|
| 6046 |
|
|
bs->record32_5 = 1;
|
| 6047 |
|
|
idetape_create_mode_select_cmd(&pc, sizeof(*header) + sizeof(*bs));
|
| 6048 |
|
|
if (idetape_queue_pc_tail(drive, &pc))
|
| 6049 |
|
|
printk(KERN_ERR "ide-tape: Couldn't set tape block size mode page\n");
|
| 6050 |
|
|
|
| 6051 |
|
|
#if ONSTREAM_DEBUG
|
| 6052 |
|
|
/*
|
| 6053 |
|
|
* In debug mode, we want to see as many errors as possible
|
| 6054 |
|
|
* to test the error recovery mechanism.
|
| 6055 |
|
|
*/
|
| 6056 |
|
|
idetape_onstream_set_retries(drive, 0);
|
| 6057 |
|
|
#endif
|
| 6058 |
|
|
}
|
| 6059 |
|
|
|
| 6060 |
|
|
/*
|
| 6061 |
|
|
* Use INQUIRY to get the firmware revision
|
| 6062 |
|
|
*/
|
| 6063 |
|
|
static void idetape_get_inquiry_results (ide_drive_t *drive)
|
| 6064 |
|
|
{
|
| 6065 |
|
|
char *r;
|
| 6066 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6067 |
|
|
idetape_pc_t pc;
|
| 6068 |
|
|
idetape_inquiry_result_t *inquiry;
|
| 6069 |
|
|
|
| 6070 |
|
|
idetape_create_inquiry_cmd(&pc);
|
| 6071 |
|
|
if (idetape_queue_pc_tail(drive, &pc)) {
|
| 6072 |
|
|
printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n", tape->name);
|
| 6073 |
|
|
return;
|
| 6074 |
|
|
}
|
| 6075 |
|
|
inquiry = (idetape_inquiry_result_t *) pc.buffer;
|
| 6076 |
|
|
memcpy(tape->vendor_id, inquiry->vendor_id, 8);
|
| 6077 |
|
|
memcpy(tape->product_id, inquiry->product_id, 16);
|
| 6078 |
|
|
memcpy(tape->firmware_revision, inquiry->revision_level, 4);
|
| 6079 |
|
|
ide_fixstring(tape->vendor_id, 10, 0);
|
| 6080 |
|
|
ide_fixstring(tape->product_id, 18, 0);
|
| 6081 |
|
|
ide_fixstring(tape->firmware_revision, 6, 0);
|
| 6082 |
|
|
r = tape->firmware_revision;
|
| 6083 |
|
|
if (*(r + 1) == '.')
|
| 6084 |
|
|
tape->firmware_revision_num = (*r - '0') * 100 + (*(r + 2) - '0') * 10 + *(r + 3) - '0';
|
| 6085 |
|
|
else if (tape->onstream)
|
| 6086 |
|
|
tape->firmware_revision_num = (*r - '0') * 100 + (*(r + 1) - '0') * 10 + *(r + 2) - '0';
|
| 6087 |
|
|
printk(KERN_INFO "ide-tape: %s <-> %s: %s %s rev %s\n", drive->name, tape->name, tape->vendor_id, tape->product_id, tape->firmware_revision);
|
| 6088 |
|
|
}
|
| 6089 |
|
|
|
| 6090 |
|
|
/*
|
| 6091 |
|
|
* Configure the OnStream ATAPI tape drive for default operation
|
| 6092 |
|
|
*/
|
| 6093 |
|
|
static void idetape_configure_onstream (ide_drive_t *drive)
|
| 6094 |
|
|
{
|
| 6095 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6096 |
|
|
|
| 6097 |
|
|
if (tape->firmware_revision_num < 105) {
|
| 6098 |
|
|
printk(KERN_INFO "ide-tape: %s: Old OnStream firmware revision detected (%s)\n", tape->name, tape->firmware_revision);
|
| 6099 |
|
|
printk(KERN_INFO "ide-tape: %s: An upgrade to version 1.05 or above is recommended\n", tape->name);
|
| 6100 |
|
|
}
|
| 6101 |
|
|
|
| 6102 |
|
|
/*
|
| 6103 |
|
|
* Configure 32.5KB (data+aux) block size.
|
| 6104 |
|
|
*/
|
| 6105 |
|
|
idetape_onstream_configure_block_size(drive);
|
| 6106 |
|
|
|
| 6107 |
|
|
/*
|
| 6108 |
|
|
* Set vendor name to 'LIN3' for "Linux support version 3".
|
| 6109 |
|
|
*/
|
| 6110 |
|
|
idetape_onstream_set_vendor(drive, "LIN3");
|
| 6111 |
|
|
}
|
| 6112 |
|
|
|
| 6113 |
|
|
/*
|
| 6114 |
|
|
* idetape_get_mode_sense_parameters asks the tape about its various
|
| 6115 |
|
|
* parameters. This may work for other drives to???
|
| 6116 |
|
|
*/
|
| 6117 |
|
|
static void idetape_onstream_mode_sense_tape_parameter_page(ide_drive_t *drive, int debug)
|
| 6118 |
|
|
{
|
| 6119 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6120 |
|
|
idetape_pc_t pc;
|
| 6121 |
|
|
idetape_mode_parameter_header_t *header;
|
| 6122 |
|
|
onstream_tape_paramtr_page_t *prm;
|
| 6123 |
|
|
|
| 6124 |
|
|
idetape_create_mode_sense_cmd(&pc, IDETAPE_PARAMTR_PAGE);
|
| 6125 |
|
|
if (idetape_queue_pc_tail(drive, &pc)) {
|
| 6126 |
|
|
printk(KERN_ERR "ide-tape: Can't get tape parameters page - probably no tape inserted in onstream drive\n");
|
| 6127 |
|
|
return;
|
| 6128 |
|
|
}
|
| 6129 |
|
|
header = (idetape_mode_parameter_header_t *) pc.buffer;
|
| 6130 |
|
|
prm = (onstream_tape_paramtr_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
|
| 6131 |
|
|
|
| 6132 |
|
|
tape->capacity = ntohs(prm->segtrk) * ntohs(prm->trks);
|
| 6133 |
|
|
if (debug) {
|
| 6134 |
|
|
printk(KERN_INFO "ide-tape: %s <-> %s: Tape length %dMB (%d frames/track, %d tracks = %d blocks, density: %dKbpi)\n",
|
| 6135 |
|
|
drive->name, tape->name, tape->capacity/32, ntohs(prm->segtrk), ntohs(prm->trks), tape->capacity, prm->density);
|
| 6136 |
|
|
}
|
| 6137 |
|
|
|
| 6138 |
|
|
return;
|
| 6139 |
|
|
}
|
| 6140 |
|
|
|
| 6141 |
|
|
/*
|
| 6142 |
|
|
* idetape_get_mode_sense_results asks the tape about its various
|
| 6143 |
|
|
* parameters. In particular, we will adjust our data transfer buffer
|
| 6144 |
|
|
* size to the recommended value as returned by the tape.
|
| 6145 |
|
|
*/
|
| 6146 |
|
|
static void idetape_get_mode_sense_results (ide_drive_t *drive)
|
| 6147 |
|
|
{
|
| 6148 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6149 |
|
|
idetape_pc_t pc;
|
| 6150 |
|
|
idetape_mode_parameter_header_t *header;
|
| 6151 |
|
|
idetape_capabilities_page_t *capabilities;
|
| 6152 |
|
|
|
| 6153 |
|
|
idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
|
| 6154 |
|
|
if (idetape_queue_pc_tail (drive, &pc)) {
|
| 6155 |
|
|
printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming some default values\n");
|
| 6156 |
|
|
tape->tape_block_size = 512;
|
| 6157 |
|
|
tape->capabilities.ctl = 52;
|
| 6158 |
|
|
tape->capabilities.speed = 450;
|
| 6159 |
|
|
tape->capabilities.buffer_size = 6 * 52;
|
| 6160 |
|
|
return;
|
| 6161 |
|
|
}
|
| 6162 |
|
|
header = (idetape_mode_parameter_header_t *) pc.buffer;
|
| 6163 |
|
|
capabilities = (idetape_capabilities_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
|
| 6164 |
|
|
|
| 6165 |
|
|
capabilities->max_speed = ntohs(capabilities->max_speed);
|
| 6166 |
|
|
capabilities->ctl = ntohs(capabilities->ctl);
|
| 6167 |
|
|
capabilities->speed = ntohs(capabilities->speed);
|
| 6168 |
|
|
capabilities->buffer_size = ntohs(capabilities->buffer_size);
|
| 6169 |
|
|
|
| 6170 |
|
|
if (!capabilities->speed) {
|
| 6171 |
|
|
printk(KERN_INFO "ide-tape: %s: overriding capabilities->speed (assuming 650KB/sec)\n", drive->name);
|
| 6172 |
|
|
capabilities->speed = 650;
|
| 6173 |
|
|
}
|
| 6174 |
|
|
if (!capabilities->max_speed) {
|
| 6175 |
|
|
printk(KERN_INFO "ide-tape: %s: overriding capabilities->max_speed (assuming 650KB/sec)\n", drive->name);
|
| 6176 |
|
|
capabilities->max_speed = 650;
|
| 6177 |
|
|
}
|
| 6178 |
|
|
if (!capabilities->ctl) {
|
| 6179 |
|
|
printk(KERN_INFO "ide-tape: %s: overriding capabilities->ctl (assuming 26KB)\n", drive->name);
|
| 6180 |
|
|
capabilities->ctl = 52;
|
| 6181 |
|
|
}
|
| 6182 |
|
|
|
| 6183 |
|
|
tape->capabilities = *capabilities; /* Save us a copy */
|
| 6184 |
|
|
if (capabilities->blk512)
|
| 6185 |
|
|
tape->tape_block_size = 512;
|
| 6186 |
|
|
else if (capabilities->blk1024)
|
| 6187 |
|
|
tape->tape_block_size = 1024;
|
| 6188 |
|
|
else if (tape->onstream && capabilities->blk32768)
|
| 6189 |
|
|
tape->tape_block_size = 32768;
|
| 6190 |
|
|
|
| 6191 |
|
|
#if IDETAPE_DEBUG_INFO
|
| 6192 |
|
|
printk(KERN_INFO "ide-tape: Dumping the results of the MODE SENSE packet command\n");
|
| 6193 |
|
|
printk(KERN_INFO "ide-tape: Mode Parameter Header:\n");
|
| 6194 |
|
|
printk(KERN_INFO "ide-tape: Mode Data Length - %d\n",header->mode_data_length);
|
| 6195 |
|
|
printk(KERN_INFO "ide-tape: Medium Type - %d\n",header->medium_type);
|
| 6196 |
|
|
printk(KERN_INFO "ide-tape: Device Specific Parameter - %d\n",header->dsp);
|
| 6197 |
|
|
printk(KERN_INFO "ide-tape: Block Descriptor Length - %d\n",header->bdl);
|
| 6198 |
|
|
|
| 6199 |
|
|
printk(KERN_INFO "ide-tape: Capabilities and Mechanical Status Page:\n");
|
| 6200 |
|
|
printk(KERN_INFO "ide-tape: Page code - %d\n",capabilities->page_code);
|
| 6201 |
|
|
printk(KERN_INFO "ide-tape: Page length - %d\n",capabilities->page_length);
|
| 6202 |
|
|
printk(KERN_INFO "ide-tape: Read only - %s\n",capabilities->ro ? "Yes":"No");
|
| 6203 |
|
|
printk(KERN_INFO "ide-tape: Supports reverse space - %s\n",capabilities->sprev ? "Yes":"No");
|
| 6204 |
|
|
printk(KERN_INFO "ide-tape: Supports erase initiated formatting - %s\n",capabilities->efmt ? "Yes":"No");
|
| 6205 |
|
|
printk(KERN_INFO "ide-tape: Supports QFA two Partition format - %s\n",capabilities->qfa ? "Yes":"No");
|
| 6206 |
|
|
printk(KERN_INFO "ide-tape: Supports locking the medium - %s\n",capabilities->lock ? "Yes":"No");
|
| 6207 |
|
|
printk(KERN_INFO "ide-tape: The volume is currently locked - %s\n",capabilities->locked ? "Yes":"No");
|
| 6208 |
|
|
printk(KERN_INFO "ide-tape: The device defaults in the prevent state - %s\n",capabilities->prevent ? "Yes":"No");
|
| 6209 |
|
|
printk(KERN_INFO "ide-tape: Supports ejecting the medium - %s\n",capabilities->eject ? "Yes":"No");
|
| 6210 |
|
|
printk(KERN_INFO "ide-tape: Supports error correction - %s\n",capabilities->ecc ? "Yes":"No");
|
| 6211 |
|
|
printk(KERN_INFO "ide-tape: Supports data compression - %s\n",capabilities->cmprs ? "Yes":"No");
|
| 6212 |
|
|
printk(KERN_INFO "ide-tape: Supports 512 bytes block size - %s\n",capabilities->blk512 ? "Yes":"No");
|
| 6213 |
|
|
printk(KERN_INFO "ide-tape: Supports 1024 bytes block size - %s\n",capabilities->blk1024 ? "Yes":"No");
|
| 6214 |
|
|
printk(KERN_INFO "ide-tape: Supports 32768 bytes block size / Restricted byte count for PIO transfers - %s\n",capabilities->blk32768 ? "Yes":"No");
|
| 6215 |
|
|
printk(KERN_INFO "ide-tape: Maximum supported speed in KBps - %d\n",capabilities->max_speed);
|
| 6216 |
|
|
printk(KERN_INFO "ide-tape: Continuous transfer limits in blocks - %d\n",capabilities->ctl);
|
| 6217 |
|
|
printk(KERN_INFO "ide-tape: Current speed in KBps - %d\n",capabilities->speed);
|
| 6218 |
|
|
printk(KERN_INFO "ide-tape: Buffer size - %d\n",capabilities->buffer_size*512);
|
| 6219 |
|
|
#endif /* IDETAPE_DEBUG_INFO */
|
| 6220 |
|
|
}
|
| 6221 |
|
|
|
| 6222 |
|
|
/*
|
| 6223 |
|
|
* ide_get_blocksize_from_block_descriptor does a mode sense page 0 with block descriptor
|
| 6224 |
|
|
* and if it succeeds sets the tape block size with the reported value
|
| 6225 |
|
|
*/
|
| 6226 |
|
|
static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive)
|
| 6227 |
|
|
{
|
| 6228 |
|
|
|
| 6229 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6230 |
|
|
idetape_pc_t pc;
|
| 6231 |
|
|
idetape_mode_parameter_header_t *header;
|
| 6232 |
|
|
idetape_parameter_block_descriptor_t *block_descrp;
|
| 6233 |
|
|
|
| 6234 |
|
|
idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
|
| 6235 |
|
|
if (idetape_queue_pc_tail(drive, &pc)) {
|
| 6236 |
|
|
printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
|
| 6237 |
|
|
return;
|
| 6238 |
|
|
}
|
| 6239 |
|
|
header = (idetape_mode_parameter_header_t *) pc.buffer;
|
| 6240 |
|
|
block_descrp = (idetape_parameter_block_descriptor_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t));
|
| 6241 |
|
|
tape->tape_block_size =( block_descrp->length[0]<<16) + (block_descrp->length[1]<<8) + block_descrp->length[2];
|
| 6242 |
|
|
#if IDETAPE_DEBUG_INFO
|
| 6243 |
|
|
printk(KERN_INFO "ide-tape: Adjusted block size - %d\n", tape->tape_block_size);
|
| 6244 |
|
|
#endif /* IDETAPE_DEBUG_INFO */
|
| 6245 |
|
|
}
|
| 6246 |
|
|
|
| 6247 |
|
|
static void idetape_add_settings (ide_drive_t *drive)
|
| 6248 |
|
|
{
|
| 6249 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6250 |
|
|
|
| 6251 |
|
|
/*
|
| 6252 |
|
|
* drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
|
| 6253 |
|
|
*/
|
| 6254 |
|
|
ide_add_setting(drive, "buffer", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 2, &tape->capabilities.buffer_size, NULL);
|
| 6255 |
|
|
ide_add_setting(drive, "pipeline_min", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
|
| 6256 |
|
|
ide_add_setting(drive, "pipeline", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
|
| 6257 |
|
|
ide_add_setting(drive, "pipeline_max", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
|
| 6258 |
|
|
ide_add_setting(drive, "pipeline_used",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_stages, NULL);
|
| 6259 |
|
|
ide_add_setting(drive, "pipeline_pending",SETTING_READ,-1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_pending_stages, NULL);
|
| 6260 |
|
|
ide_add_setting(drive, "speed", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->capabilities.speed, NULL);
|
| 6261 |
|
|
ide_add_setting(drive, "stage", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1024, &tape->stage_size, NULL);
|
| 6262 |
|
|
ide_add_setting(drive, "tdsc", SETTING_RW, -1, -1, TYPE_INT, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_frequency, NULL);
|
| 6263 |
|
|
ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
|
| 6264 |
|
|
ide_add_setting(drive, "pipeline_head_speed_c",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed, NULL);
|
| 6265 |
|
|
ide_add_setting(drive, "pipeline_head_speed_u",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->uncontrolled_pipeline_head_speed, NULL);
|
| 6266 |
|
|
ide_add_setting(drive, "avg_speed", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->avg_speed, NULL);
|
| 6267 |
|
|
ide_add_setting(drive, "debug_level",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->debug_level, NULL);
|
| 6268 |
|
|
if (tape->onstream) {
|
| 6269 |
|
|
ide_add_setting(drive, "cur_frames", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->cur_frames, NULL);
|
| 6270 |
|
|
ide_add_setting(drive, "max_frames", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->max_frames, NULL);
|
| 6271 |
|
|
ide_add_setting(drive, "insert_speed", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->insert_speed, NULL);
|
| 6272 |
|
|
ide_add_setting(drive, "speed_control",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->speed_control, NULL);
|
| 6273 |
|
|
ide_add_setting(drive, "tape_still_time",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->tape_still_time, NULL);
|
| 6274 |
|
|
ide_add_setting(drive, "max_insert_speed",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->max_insert_speed, NULL);
|
| 6275 |
|
|
ide_add_setting(drive, "insert_size", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->insert_size, NULL);
|
| 6276 |
|
|
ide_add_setting(drive, "capacity", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->capacity, NULL);
|
| 6277 |
|
|
ide_add_setting(drive, "first_frame", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->first_frame_position, NULL);
|
| 6278 |
|
|
ide_add_setting(drive, "logical_blk", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->logical_blk_num, NULL);
|
| 6279 |
|
|
}
|
| 6280 |
|
|
}
|
| 6281 |
|
|
|
| 6282 |
|
|
/*
|
| 6283 |
|
|
* ide_setup is called to:
|
| 6284 |
|
|
*
|
| 6285 |
|
|
* 1. Initialize our various state variables.
|
| 6286 |
|
|
* 2. Ask the tape for its capabilities.
|
| 6287 |
|
|
* 3. Allocate a buffer which will be used for data
|
| 6288 |
|
|
* transfer. The buffer size is chosen based on
|
| 6289 |
|
|
* the recommendation which we received in step (2).
|
| 6290 |
|
|
*
|
| 6291 |
|
|
* Note that at this point ide.c already assigned us an irq, so that
|
| 6292 |
|
|
* we can queue requests here and wait for their completion.
|
| 6293 |
|
|
*/
|
| 6294 |
|
|
static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
|
| 6295 |
|
|
{
|
| 6296 |
|
|
unsigned long t1, tmid, tn, t;
|
| 6297 |
|
|
int speed;
|
| 6298 |
|
|
struct idetape_id_gcw gcw;
|
| 6299 |
|
|
int stage_size;
|
| 6300 |
|
|
struct sysinfo si;
|
| 6301 |
|
|
|
| 6302 |
|
|
memset(tape, 0, sizeof (idetape_tape_t));
|
| 6303 |
|
|
spin_lock_init(&tape->spinlock);
|
| 6304 |
|
|
drive->driver_data = tape;
|
| 6305 |
|
|
/* An ATAPI device ignores DRDY */
|
| 6306 |
|
|
drive->ready_stat = 0;
|
| 6307 |
|
|
if (strstr(drive->id->model, "OnStream DI-"))
|
| 6308 |
|
|
tape->onstream = 1;
|
| 6309 |
|
|
drive->dsc_overlap = (HWIF(drive)->no_dsc) ? 0 : 1;
|
| 6310 |
|
|
if (HWIF(drive)->no_dsc) {
|
| 6311 |
|
|
printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
|
| 6312 |
|
|
tape->name);
|
| 6313 |
|
|
drive->dsc_overlap = 0;
|
| 6314 |
|
|
}
|
| 6315 |
|
|
tape->drive = drive;
|
| 6316 |
|
|
tape->minor = minor;
|
| 6317 |
|
|
tape->name[0] = 'h';
|
| 6318 |
|
|
tape->name[1] = 't';
|
| 6319 |
|
|
tape->name[2] = '0' + minor;
|
| 6320 |
|
|
tape->chrdev_direction = idetape_direction_none;
|
| 6321 |
|
|
tape->pc = tape->pc_stack;
|
| 6322 |
|
|
tape->max_insert_speed = 10000;
|
| 6323 |
|
|
tape->speed_control = 1;
|
| 6324 |
|
|
*((unsigned short *) &gcw) = drive->id->config;
|
| 6325 |
|
|
if (gcw.drq_type == 1)
|
| 6326 |
|
|
set_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags);
|
| 6327 |
|
|
|
| 6328 |
|
|
tape->min_pipeline = tape->max_pipeline = tape->max_stages = 10;
|
| 6329 |
|
|
|
| 6330 |
|
|
idetape_get_inquiry_results(drive);
|
| 6331 |
|
|
idetape_get_mode_sense_results(drive);
|
| 6332 |
|
|
idetape_get_blocksize_from_block_descriptor(drive);
|
| 6333 |
|
|
if (tape->tape_block_size == 0) {
|
| 6334 |
|
|
printk(KERN_WARNING "ide-tape: Zero block size, using 512\n");
|
| 6335 |
|
|
tape->tape_block_size = 512;
|
| 6336 |
|
|
}
|
| 6337 |
|
|
if (tape->onstream) {
|
| 6338 |
|
|
idetape_onstream_mode_sense_tape_parameter_page(drive, 1);
|
| 6339 |
|
|
idetape_configure_onstream(drive);
|
| 6340 |
|
|
}
|
| 6341 |
|
|
tape->user_bs_factor = 1;
|
| 6342 |
|
|
tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
|
| 6343 |
|
|
while (tape->stage_size > 0xffff) {
|
| 6344 |
|
|
printk (KERN_NOTICE "ide-tape: decreasing stage size\n");
|
| 6345 |
|
|
tape->capabilities.ctl /= 2;
|
| 6346 |
|
|
tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
|
| 6347 |
|
|
}
|
| 6348 |
|
|
stage_size = tape->stage_size;
|
| 6349 |
|
|
if (tape->onstream)
|
| 6350 |
|
|
stage_size = 32768 + 512;
|
| 6351 |
|
|
tape->pages_per_stage = stage_size / PAGE_SIZE;
|
| 6352 |
|
|
if (stage_size % PAGE_SIZE) {
|
| 6353 |
|
|
tape->pages_per_stage++;
|
| 6354 |
|
|
tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
|
| 6355 |
|
|
}
|
| 6356 |
|
|
|
| 6357 |
|
|
/*
|
| 6358 |
|
|
* Select the "best" DSC read/write polling frequency
|
| 6359 |
|
|
* and pipeline size.
|
| 6360 |
|
|
*/
|
| 6361 |
|
|
speed = IDE_MAX(tape->capabilities.speed, tape->capabilities.max_speed);
|
| 6362 |
|
|
|
| 6363 |
|
|
tape->max_stages = speed * 1000 * 10 / tape->stage_size;
|
| 6364 |
|
|
|
| 6365 |
|
|
/*
|
| 6366 |
|
|
* Limit memory use for pipeline to 10% of physical memory
|
| 6367 |
|
|
*/
|
| 6368 |
|
|
si_meminfo(&si);
|
| 6369 |
|
|
if (tape->max_stages * tape->stage_size > si.totalram * si.mem_unit / 10)
|
| 6370 |
|
|
tape->max_stages = si.totalram * si.mem_unit / (10 * tape->stage_size);
|
| 6371 |
|
|
tape->max_stages = IDE_MIN(tape->max_stages, IDETAPE_MAX_PIPELINE_STAGES);
|
| 6372 |
|
|
tape->min_pipeline = IDE_MIN(tape->max_stages, IDETAPE_MIN_PIPELINE_STAGES);
|
| 6373 |
|
|
tape->max_pipeline = IDE_MIN(tape->max_stages * 2, IDETAPE_MAX_PIPELINE_STAGES);
|
| 6374 |
|
|
if (tape->max_stages == 0)
|
| 6375 |
|
|
tape->max_stages = tape->min_pipeline = tape->max_pipeline = 1;
|
| 6376 |
|
|
|
| 6377 |
|
|
t1 = (tape->stage_size * HZ) / (speed * 1000);
|
| 6378 |
|
|
tmid = (tape->capabilities.buffer_size * 32 * HZ) / (speed * 125);
|
| 6379 |
|
|
tn = (IDETAPE_FIFO_THRESHOLD * tape->stage_size * HZ) / (speed * 1000);
|
| 6380 |
|
|
|
| 6381 |
|
|
if (tape->max_stages)
|
| 6382 |
|
|
t = tn;
|
| 6383 |
|
|
else
|
| 6384 |
|
|
t = t1;
|
| 6385 |
|
|
|
| 6386 |
|
|
/*
|
| 6387 |
|
|
* Ensure that the number we got makes sense; limit
|
| 6388 |
|
|
* it within IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX.
|
| 6389 |
|
|
*/
|
| 6390 |
|
|
tape->best_dsc_rw_frequency = IDE_MAX(IDE_MIN(t, IDETAPE_DSC_RW_MAX), IDETAPE_DSC_RW_MIN);
|
| 6391 |
|
|
printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
|
| 6392 |
|
|
"%dkB pipeline, %lums tDSC%s\n",
|
| 6393 |
|
|
drive->name, tape->name, tape->capabilities.speed,
|
| 6394 |
|
|
(tape->capabilities.buffer_size * 512) / tape->stage_size,
|
| 6395 |
|
|
tape->stage_size / 1024,
|
| 6396 |
|
|
tape->max_stages * tape->stage_size / 1024,
|
| 6397 |
|
|
tape->best_dsc_rw_frequency * 1000 / HZ,
|
| 6398 |
|
|
drive->using_dma ? ", DMA":"");
|
| 6399 |
|
|
|
| 6400 |
|
|
idetape_add_settings(drive);
|
| 6401 |
|
|
}
|
| 6402 |
|
|
|
| 6403 |
|
|
static int idetape_cleanup (ide_drive_t *drive)
|
| 6404 |
|
|
{
|
| 6405 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6406 |
|
|
int minor = tape->minor;
|
| 6407 |
|
|
unsigned long flags;
|
| 6408 |
|
|
|
| 6409 |
|
|
spin_lock_irqsave(&io_request_lock, flags);
|
| 6410 |
|
|
if (test_bit(IDETAPE_BUSY, &tape->flags) || drive->usage ||
|
| 6411 |
|
|
tape->first_stage != NULL || tape->merge_stage_size) {
|
| 6412 |
|
|
spin_unlock_irqrestore(&io_request_lock, flags);
|
| 6413 |
|
|
return 1;
|
| 6414 |
|
|
}
|
| 6415 |
|
|
idetape_chrdevs[minor].drive = NULL;
|
| 6416 |
|
|
spin_unlock_irqrestore(&io_request_lock, flags);
|
| 6417 |
|
|
DRIVER(drive)->busy = 0;
|
| 6418 |
|
|
(void) ide_unregister_subdriver(drive);
|
| 6419 |
|
|
drive->driver_data = NULL;
|
| 6420 |
|
|
devfs_unregister(tape->de_r);
|
| 6421 |
|
|
devfs_unregister(tape->de_n);
|
| 6422 |
|
|
kfree(tape);
|
| 6423 |
|
|
for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++)
|
| 6424 |
|
|
if (idetape_chrdevs[minor].drive != NULL)
|
| 6425 |
|
|
return 0;
|
| 6426 |
|
|
devfs_unregister_chrdev(IDETAPE_MAJOR, "ht");
|
| 6427 |
|
|
idetape_chrdev_present = 0;
|
| 6428 |
|
|
return 0;
|
| 6429 |
|
|
}
|
| 6430 |
|
|
|
| 6431 |
|
|
#ifdef CONFIG_PROC_FS
|
| 6432 |
|
|
|
| 6433 |
|
|
static int proc_idetape_read_name
|
| 6434 |
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
| 6435 |
|
|
{
|
| 6436 |
|
|
ide_drive_t *drive = (ide_drive_t *) data;
|
| 6437 |
|
|
idetape_tape_t *tape = drive->driver_data;
|
| 6438 |
|
|
char *out = page;
|
| 6439 |
|
|
int len;
|
| 6440 |
|
|
|
| 6441 |
|
|
len = sprintf(out, "%s\n", tape->name);
|
| 6442 |
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
| 6443 |
|
|
}
|
| 6444 |
|
|
|
| 6445 |
|
|
static ide_proc_entry_t idetape_proc[] = {
|
| 6446 |
|
|
{ "name", S_IFREG|S_IRUGO, proc_idetape_read_name, NULL },
|
| 6447 |
|
|
{ NULL, 0, NULL, NULL }
|
| 6448 |
|
|
};
|
| 6449 |
|
|
|
| 6450 |
|
|
#else
|
| 6451 |
|
|
|
| 6452 |
|
|
#define idetape_proc NULL
|
| 6453 |
|
|
|
| 6454 |
|
|
#endif
|
| 6455 |
|
|
|
| 6456 |
|
|
int idetape_init (void);
|
| 6457 |
|
|
int idetape_attach(ide_drive_t *drive);
|
| 6458 |
|
|
|
| 6459 |
|
|
/*
|
| 6460 |
|
|
* IDE subdriver functions, registered with ide.c
|
| 6461 |
|
|
*/
|
| 6462 |
|
|
static ide_driver_t idetape_driver = {
|
| 6463 |
|
|
name: "ide-tape",
|
| 6464 |
|
|
version: IDETAPE_VERSION,
|
| 6465 |
|
|
media: ide_tape,
|
| 6466 |
|
|
busy: 1,
|
| 6467 |
|
|
supports_dma: 1,
|
| 6468 |
|
|
supports_dsc_overlap: 1,
|
| 6469 |
|
|
cleanup: idetape_cleanup,
|
| 6470 |
|
|
standby: NULL,
|
| 6471 |
|
|
suspend: NULL,
|
| 6472 |
|
|
resume: NULL,
|
| 6473 |
|
|
flushcache: NULL,
|
| 6474 |
|
|
do_request: idetape_do_request,
|
| 6475 |
|
|
end_request: idetape_end_request,
|
| 6476 |
|
|
sense: NULL,
|
| 6477 |
|
|
error: NULL,
|
| 6478 |
|
|
ioctl: idetape_blkdev_ioctl,
|
| 6479 |
|
|
open: idetape_blkdev_open,
|
| 6480 |
|
|
release: idetape_blkdev_release,
|
| 6481 |
|
|
media_change: NULL,
|
| 6482 |
|
|
revalidate: NULL,
|
| 6483 |
|
|
pre_reset: idetape_pre_reset,
|
| 6484 |
|
|
capacity: NULL,
|
| 6485 |
|
|
special: NULL,
|
| 6486 |
|
|
proc: idetape_proc,
|
| 6487 |
|
|
init: idetape_init,
|
| 6488 |
|
|
attach: idetape_attach,
|
| 6489 |
|
|
ata_prebuilder: NULL,
|
| 6490 |
|
|
atapi_prebuilder: NULL,
|
| 6491 |
|
|
};
|
| 6492 |
|
|
|
| 6493 |
|
|
static ide_module_t idetape_module = {
|
| 6494 |
|
|
IDE_DRIVER_MODULE,
|
| 6495 |
|
|
idetape_init,
|
| 6496 |
|
|
&idetape_driver,
|
| 6497 |
|
|
NULL
|
| 6498 |
|
|
};
|
| 6499 |
|
|
|
| 6500 |
|
|
/*
|
| 6501 |
|
|
* Our character device supporting functions, passed to register_chrdev.
|
| 6502 |
|
|
*/
|
| 6503 |
|
|
static struct file_operations idetape_fops = {
|
| 6504 |
|
|
owner: THIS_MODULE,
|
| 6505 |
|
|
read: idetape_chrdev_read,
|
| 6506 |
|
|
write: idetape_chrdev_write,
|
| 6507 |
|
|
ioctl: idetape_chrdev_ioctl,
|
| 6508 |
|
|
open: idetape_chrdev_open,
|
| 6509 |
|
|
release: idetape_chrdev_release,
|
| 6510 |
|
|
};
|
| 6511 |
|
|
|
| 6512 |
|
|
int idetape_attach (ide_drive_t *drive)
|
| 6513 |
|
|
{
|
| 6514 |
|
|
idetape_tape_t *tape;
|
| 6515 |
|
|
int minor = 0, ret = 0;
|
| 6516 |
|
|
|
| 6517 |
|
|
MOD_INC_USE_COUNT;
|
| 6518 |
|
|
|
| 6519 |
|
|
if (idetape_identify_device(drive)) {
|
| 6520 |
|
|
printk(KERN_ERR "ide-tape: %s: not supported by this "
|
| 6521 |
|
|
"version of ide-tape\n", drive->name);
|
| 6522 |
|
|
ret = 1;
|
| 6523 |
|
|
goto bye_game_over;
|
| 6524 |
|
|
}
|
| 6525 |
|
|
if (drive->scsi) {
|
| 6526 |
|
|
if (strstr(drive->id->model, "OnStream DI-30")) {
|
| 6527 |
|
|
printk("ide-tape: ide-scsi emulation is not "
|
| 6528 |
|
|
"supported for %s.\n", drive->id->model);
|
| 6529 |
|
|
} else {
|
| 6530 |
|
|
printk("ide-tape: passing drive %s to ide-scsi "
|
| 6531 |
|
|
"emulation.\n", drive->name);
|
| 6532 |
|
|
ret = 1;
|
| 6533 |
|
|
goto bye_game_over;
|
| 6534 |
|
|
}
|
| 6535 |
|
|
}
|
| 6536 |
|
|
tape = (idetape_tape_t *) kmalloc (sizeof (idetape_tape_t), GFP_KERNEL);
|
| 6537 |
|
|
if (tape == NULL) {
|
| 6538 |
|
|
printk(KERN_ERR "ide-tape: %s: Can't allocate a "
|
| 6539 |
|
|
"tape structure\n", drive->name);
|
| 6540 |
|
|
ret = 1;
|
| 6541 |
|
|
goto bye_game_over;
|
| 6542 |
|
|
}
|
| 6543 |
|
|
if (ide_register_subdriver(drive,
|
| 6544 |
|
|
&idetape_driver, IDE_SUBDRIVER_VERSION)) {
|
| 6545 |
|
|
printk(KERN_ERR "ide-tape: %s: Failed to register the "
|
| 6546 |
|
|
"driver with ide.c\n", drive->name);
|
| 6547 |
|
|
kfree(tape);
|
| 6548 |
|
|
ret = 1;
|
| 6549 |
|
|
goto bye_game_over;
|
| 6550 |
|
|
}
|
| 6551 |
|
|
for (minor = 0; idetape_chrdevs[minor].drive != NULL; minor++);
|
| 6552 |
|
|
idetape_setup (drive, tape, minor);
|
| 6553 |
|
|
idetape_chrdevs[minor].drive = drive;
|
| 6554 |
|
|
tape->de_r = devfs_register(drive->de, "mt", DEVFS_FL_DEFAULT,
|
| 6555 |
|
|
HWIF(drive)->major, minor,
|
| 6556 |
|
|
S_IFCHR | S_IRUGO | S_IWUGO,
|
| 6557 |
|
|
&idetape_fops, NULL);
|
| 6558 |
|
|
tape->de_n = devfs_register(drive->de, "mtn", DEVFS_FL_DEFAULT,
|
| 6559 |
|
|
HWIF(drive)->major, minor + 128,
|
| 6560 |
|
|
S_IFCHR | S_IRUGO | S_IWUGO,
|
| 6561 |
|
|
&idetape_fops, NULL);
|
| 6562 |
|
|
devfs_register_tape(tape->de_r);
|
| 6563 |
|
|
|
| 6564 |
|
|
bye_game_over:
|
| 6565 |
|
|
MOD_DEC_USE_COUNT;
|
| 6566 |
|
|
|
| 6567 |
|
|
return ret;
|
| 6568 |
|
|
}
|
| 6569 |
|
|
|
| 6570 |
|
|
MODULE_DESCRIPTION("ATAPI Streaming TAPE Driver");
|
| 6571 |
|
|
MODULE_LICENSE("GPL");
|
| 6572 |
|
|
|
| 6573 |
|
|
static void __exit idetape_exit (void)
|
| 6574 |
|
|
{
|
| 6575 |
|
|
ide_drive_t *drive;
|
| 6576 |
|
|
int minor;
|
| 6577 |
|
|
|
| 6578 |
|
|
for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++) {
|
| 6579 |
|
|
drive = idetape_chrdevs[minor].drive;
|
| 6580 |
|
|
if (drive) {
|
| 6581 |
|
|
if (idetape_cleanup(drive))
|
| 6582 |
|
|
printk(KERN_ERR "ide-tape: %s: cleanup_module() "
|
| 6583 |
|
|
"called while still busy\n", drive->name);
|
| 6584 |
|
|
#ifdef CONFIG_PROC_FS
|
| 6585 |
|
|
if (drive->proc)
|
| 6586 |
|
|
ide_remove_proc_entries(drive->proc, idetape_proc);
|
| 6587 |
|
|
#endif
|
| 6588 |
|
|
}
|
| 6589 |
|
|
}
|
| 6590 |
|
|
|
| 6591 |
|
|
ide_unregister_module(&idetape_module);
|
| 6592 |
|
|
}
|
| 6593 |
|
|
|
| 6594 |
|
|
int idetape_init (void)
|
| 6595 |
|
|
{
|
| 6596 |
|
|
#ifdef CLASSIC_BUILTINS_METHOD
|
| 6597 |
|
|
ide_drive_t *drive;
|
| 6598 |
|
|
idetape_tape_t *tape;
|
| 6599 |
|
|
int minor, failed = 0, supported = 0;
|
| 6600 |
|
|
/* DRIVER(drive)->busy++; */
|
| 6601 |
|
|
MOD_INC_USE_COUNT;
|
| 6602 |
|
|
#if ONSTREAM_DEBUG
|
| 6603 |
|
|
printk(KERN_INFO "ide-tape: MOD_INC_USE_COUNT in idetape_init\n");
|
| 6604 |
|
|
#endif
|
| 6605 |
|
|
if (!idetape_chrdev_present)
|
| 6606 |
|
|
for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++ )
|
| 6607 |
|
|
idetape_chrdevs[minor].drive = NULL;
|
| 6608 |
|
|
if ((drive = ide_scan_devices(ide_tape, idetape_driver.name,
|
| 6609 |
|
|
NULL, failed++)) == NULL) {
|
| 6610 |
|
|
ide_register_module(&idetape_module);
|
| 6611 |
|
|
MOD_DEC_USE_COUNT;
|
| 6612 |
|
|
#if ONSTREAM_DEBUG
|
| 6613 |
|
|
printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT in "
|
| 6614 |
|
|
"idetape_init\n");
|
| 6615 |
|
|
#endif
|
| 6616 |
|
|
return 0;
|
| 6617 |
|
|
}
|
| 6618 |
|
|
if (!idetape_chrdev_present &&
|
| 6619 |
|
|
devfs_register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) {
|
| 6620 |
|
|
printk(KERN_ERR "ide-tape: Failed to register character "
|
| 6621 |
|
|
"device interface\n");
|
| 6622 |
|
|
MOD_DEC_USE_COUNT;
|
| 6623 |
|
|
#if ONSTREAM_DEBUG
|
| 6624 |
|
|
printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT in "
|
| 6625 |
|
|
"idetape_init\n");
|
| 6626 |
|
|
#endif
|
| 6627 |
|
|
return -EBUSY;
|
| 6628 |
|
|
}
|
| 6629 |
|
|
do {
|
| 6630 |
|
|
if (!idetape_identify_device(drive)) {
|
| 6631 |
|
|
printk(KERN_ERR "ide-tape: %s: not supported by this "
|
| 6632 |
|
|
"version of ide-tape\n", drive->name);
|
| 6633 |
|
|
continue;
|
| 6634 |
|
|
}
|
| 6635 |
|
|
if (drive->scsi) {
|
| 6636 |
|
|
if (strstr(drive->id->model, "OnStream DI-")) {
|
| 6637 |
|
|
printk("ide-tape: ide-scsi emulation is not "
|
| 6638 |
|
|
"supported for %s.\n",
|
| 6639 |
|
|
drive->id->model);
|
| 6640 |
|
|
} else {
|
| 6641 |
|
|
printk("ide-tape: passing drive %s to "
|
| 6642 |
|
|
"ide-scsi emulation.\n", drive->name);
|
| 6643 |
|
|
continue;
|
| 6644 |
|
|
}
|
| 6645 |
|
|
}
|
| 6646 |
|
|
tape = (idetape_tape_t *) kmalloc (sizeof (idetape_tape_t), GFP_KERNEL);
|
| 6647 |
|
|
if (tape == NULL) {
|
| 6648 |
|
|
printk(KERN_ERR "ide-tape: %s: Can't allocate a tape "
|
| 6649 |
|
|
"structure\n", drive->name);
|
| 6650 |
|
|
continue;
|
| 6651 |
|
|
}
|
| 6652 |
|
|
if (ide_register_subdriver(drive,
|
| 6653 |
|
|
&idetape_driver, IDE_SUBDRIVER_VERSION)) {
|
| 6654 |
|
|
printk(KERN_ERR "ide-tape: %s: Failed to register the "
|
| 6655 |
|
|
"driver with ide.c\n", drive->name);
|
| 6656 |
|
|
kfree(tape);
|
| 6657 |
|
|
continue;
|
| 6658 |
|
|
}
|
| 6659 |
|
|
for (minor = 0; idetape_chrdevs[minor].drive != NULL; minor++);
|
| 6660 |
|
|
idetape_setup(drive, tape, minor);
|
| 6661 |
|
|
idetape_chrdevs[minor].drive = drive;
|
| 6662 |
|
|
tape->de_r =
|
| 6663 |
|
|
devfs_register(drive->de, "mt", DEVFS_FL_DEFAULT,
|
| 6664 |
|
|
HWIF(drive)->major, minor,
|
| 6665 |
|
|
S_IFCHR | S_IRUGO | S_IWUGO,
|
| 6666 |
|
|
&idetape_fops, NULL);
|
| 6667 |
|
|
tape->de_n =
|
| 6668 |
|
|
devfs_register(drive->de, "mtn", DEVFS_FL_DEFAULT,
|
| 6669 |
|
|
HWIF(drive)->major, minor + 128,
|
| 6670 |
|
|
S_IFCHR | S_IRUGO | S_IWUGO,
|
| 6671 |
|
|
&idetape_fops, NULL);
|
| 6672 |
|
|
devfs_register_tape(tape->de_r);
|
| 6673 |
|
|
supported++;
|
| 6674 |
|
|
failed--;
|
| 6675 |
|
|
} while ((drive = ide_scan_devices(ide_tape,
|
| 6676 |
|
|
idetape_driver.name, NULL, failed++)) != NULL);
|
| 6677 |
|
|
if (!idetape_chrdev_present && !supported) {
|
| 6678 |
|
|
devfs_unregister_chrdev(IDETAPE_MAJOR, "ht");
|
| 6679 |
|
|
} else
|
| 6680 |
|
|
idetape_chrdev_present = 1;
|
| 6681 |
|
|
#else /* ! CLASSIC_BUILTINS_METHOD */
|
| 6682 |
|
|
int minor = 0;
|
| 6683 |
|
|
|
| 6684 |
|
|
if (idetape_chrdev_present)
|
| 6685 |
|
|
return 0;
|
| 6686 |
|
|
idetape_chrdev_present = 1;
|
| 6687 |
|
|
for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++ )
|
| 6688 |
|
|
idetape_chrdevs[minor].drive = NULL;
|
| 6689 |
|
|
devfs_register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops);
|
| 6690 |
|
|
MOD_INC_USE_COUNT;
|
| 6691 |
|
|
#endif /* CLASSIC_BUILTINS_METHOD */
|
| 6692 |
|
|
ide_register_module(&idetape_module);
|
| 6693 |
|
|
MOD_DEC_USE_COUNT;
|
| 6694 |
|
|
return 0;
|
| 6695 |
|
|
}
|
| 6696 |
|
|
|
| 6697 |
|
|
module_init(idetape_init);
|
| 6698 |
|
|
module_exit(idetape_exit);
|
