1 |
3 |
xianfeng |
The Linux SYM-2 driver documentation file
|
2 |
|
|
|
3 |
|
|
Written by Gerard Roudier
|
4 |
|
|
21 Rue Carnot
|
5 |
|
|
95170 DEUIL LA BARRE - FRANCE
|
6 |
|
|
|
7 |
|
|
Updated by Matthew Wilcox
|
8 |
|
|
|
9 |
|
|
2004-10-09
|
10 |
|
|
===============================================================================
|
11 |
|
|
|
12 |
|
|
1. Introduction
|
13 |
|
|
2. Supported chips and SCSI features
|
14 |
|
|
3. Advantages of this driver for newer chips.
|
15 |
|
|
3.1 Optimized SCSI SCRIPTS
|
16 |
|
|
3.2 New features appeared with the SYM53C896
|
17 |
|
|
4. Memory mapped I/O versus normal I/O
|
18 |
|
|
5. Tagged command queueing
|
19 |
|
|
6. Parity checking
|
20 |
|
|
7. Profiling information
|
21 |
|
|
8. Control commands
|
22 |
|
|
8.1 Set minimum synchronous period
|
23 |
|
|
8.2 Set wide size
|
24 |
|
|
8.3 Set maximum number of concurrent tagged commands
|
25 |
|
|
8.4 Set debug mode
|
26 |
|
|
8.5 Set flag (no_disc)
|
27 |
|
|
8.6 Set verbose level
|
28 |
|
|
8.7 Reset all logical units of a target
|
29 |
|
|
8.8 Abort all tasks of all logical units of a target
|
30 |
|
|
9. Configuration parameters
|
31 |
|
|
10. Boot setup commands
|
32 |
|
|
10.1 Syntax
|
33 |
|
|
10.2 Available arguments
|
34 |
|
|
10.2.1 Default number of tagged commands
|
35 |
|
|
10.2.2 Burst max
|
36 |
|
|
10.2.3 LED support
|
37 |
|
|
10.2.4 Differential mode
|
38 |
|
|
10.2.5 IRQ mode
|
39 |
|
|
10.2.6 Check SCSI BUS
|
40 |
|
|
10.2.7 Suggest a default SCSI id for hosts
|
41 |
|
|
10.2.8 Verbosity level
|
42 |
|
|
10.2.9 Debug mode
|
43 |
|
|
10.2.10 Settle delay
|
44 |
|
|
10.2.11 Serial NVRAM
|
45 |
|
|
10.2.12 Exclude a host from being attached
|
46 |
|
|
10.3 Converting from old options
|
47 |
|
|
10.4 SCSI BUS checking boot option
|
48 |
|
|
11. SCSI problem troubleshooting
|
49 |
|
|
15.1 Problem tracking
|
50 |
|
|
15.2 Understanding hardware error reports
|
51 |
|
|
12. Serial NVRAM support (by Richard Waltham)
|
52 |
|
|
17.1 Features
|
53 |
|
|
17.2 Symbios NVRAM layout
|
54 |
|
|
17.3 Tekram NVRAM layout
|
55 |
|
|
|
56 |
|
|
===============================================================================
|
57 |
|
|
|
58 |
|
|
1. Introduction
|
59 |
|
|
|
60 |
|
|
This driver supports the whole SYM53C8XX family of PCI-SCSI controllers.
|
61 |
|
|
It also support the subset of LSI53C10XX PCI-SCSI controllers that are based
|
62 |
|
|
on the SYM53C8XX SCRIPTS language.
|
63 |
|
|
|
64 |
|
|
It replaces the sym53c8xx+ncr53c8xx driver bundle and shares its core code
|
65 |
|
|
with the FreeBSD SYM-2 driver. The `glue' that allows this driver to work
|
66 |
|
|
under Linux is contained in 2 files named sym_glue.h and sym_glue.c.
|
67 |
|
|
Other drivers files are intended not to depend on the Operating System
|
68 |
|
|
on which the driver is used.
|
69 |
|
|
|
70 |
|
|
The history of this driver can be summarized as follows:
|
71 |
|
|
|
72 |
|
|
1993: ncr driver written for 386bsd and FreeBSD by:
|
73 |
|
|
Wolfgang Stanglmeier
|
74 |
|
|
Stefan Esser
|
75 |
|
|
|
76 |
|
|
1996: port of the ncr driver to Linux-1.2.13 and rename it ncr53c8xx.
|
77 |
|
|
Gerard Roudier
|
78 |
|
|
|
79 |
|
|
1998: new sym53c8xx driver for Linux based on LOAD/STORE instruction and that
|
80 |
|
|
adds full support for the 896 but drops support for early NCR devices.
|
81 |
|
|
Gerard Roudier
|
82 |
|
|
|
83 |
|
|
1999: port of the sym53c8xx driver to FreeBSD and support for the LSI53C1010
|
84 |
|
|
33 MHz and 66MHz Ultra-3 controllers. The new driver is named `sym'.
|
85 |
|
|
Gerard Roudier
|
86 |
|
|
|
87 |
|
|
2000: Add support for early NCR devices to FreeBSD `sym' driver.
|
88 |
|
|
Break the driver into several sources and separate the OS glue
|
89 |
|
|
code from the core code that can be shared among different O/Ses.
|
90 |
|
|
Write a glue code for Linux.
|
91 |
|
|
Gerard Roudier
|
92 |
|
|
|
93 |
|
|
2004: Remove FreeBSD compatibility code. Remove support for versions of
|
94 |
|
|
Linux before 2.6. Start using Linux facilities.
|
95 |
|
|
|
96 |
|
|
This README file addresses the Linux version of the driver. Under FreeBSD,
|
97 |
|
|
the driver documentation is the sym.8 man page.
|
98 |
|
|
|
99 |
|
|
Information about new chips is available at LSILOGIC web server:
|
100 |
|
|
|
101 |
|
|
http://www.lsilogic.com/
|
102 |
|
|
|
103 |
|
|
SCSI standard documentations are available at T10 site:
|
104 |
|
|
|
105 |
|
|
http://www.t10.org/
|
106 |
|
|
|
107 |
|
|
Useful SCSI tools written by Eric Youngdale are part of most Linux
|
108 |
|
|
distributions:
|
109 |
|
|
scsiinfo: command line tool
|
110 |
|
|
scsi-config: TCL/Tk tool using scsiinfo
|
111 |
|
|
|
112 |
|
|
2. Supported chips and SCSI features
|
113 |
|
|
|
114 |
|
|
The following features are supported for all chips:
|
115 |
|
|
|
116 |
|
|
Synchronous negotiation
|
117 |
|
|
Disconnection
|
118 |
|
|
Tagged command queuing
|
119 |
|
|
SCSI parity checking
|
120 |
|
|
PCI Master parity checking
|
121 |
|
|
|
122 |
|
|
Other features depends on chip capabilities.
|
123 |
|
|
The driver notably uses optimized SCRIPTS for devices that support
|
124 |
|
|
LOAD/STORE and handles PHASE MISMATCH from SCRIPTS for devices that
|
125 |
|
|
support the corresponding feature.
|
126 |
|
|
|
127 |
|
|
The following table shows some characteristics of the chip family.
|
128 |
|
|
|
129 |
|
|
On board LOAD/STORE HARDWARE
|
130 |
|
|
Chip SDMS BIOS Wide SCSI std. Max. sync SCRIPTS PHASE MISMATCH
|
131 |
|
|
---- --------- ---- --------- ---------- ---------- --------------
|
132 |
|
|
810 N N FAST10 10 MB/s N N
|
133 |
|
|
810A N N FAST10 10 MB/s Y N
|
134 |
|
|
815 Y N FAST10 10 MB/s N N
|
135 |
|
|
825 Y Y FAST10 20 MB/s N N
|
136 |
|
|
825A Y Y FAST10 20 MB/s Y N
|
137 |
|
|
860 N N FAST20 20 MB/s Y N
|
138 |
|
|
875 Y Y FAST20 40 MB/s Y N
|
139 |
|
|
875A Y Y FAST20 40 MB/s Y Y
|
140 |
|
|
876 Y Y FAST20 40 MB/s Y N
|
141 |
|
|
895 Y Y FAST40 80 MB/s Y N
|
142 |
|
|
895A Y Y FAST40 80 MB/s Y Y
|
143 |
|
|
896 Y Y FAST40 80 MB/s Y Y
|
144 |
|
|
897 Y Y FAST40 80 MB/s Y Y
|
145 |
|
|
1510D Y Y FAST40 80 MB/s Y Y
|
146 |
|
|
1010 Y Y FAST80 160 MB/s Y Y
|
147 |
|
|
1010_66* Y Y FAST80 160 MB/s Y Y
|
148 |
|
|
|
149 |
|
|
* Chip supports 33MHz and 66MHz PCI bus clock.
|
150 |
|
|
|
151 |
|
|
|
152 |
|
|
Summary of other supported features:
|
153 |
|
|
|
154 |
|
|
Module: allow to load the driver
|
155 |
|
|
Memory mapped I/O: increases performance
|
156 |
|
|
Control commands: write operations to the proc SCSI file system
|
157 |
|
|
Debugging information: written to syslog (expert only)
|
158 |
|
|
Scatter / gather
|
159 |
|
|
Shared interrupt
|
160 |
|
|
Boot setup commands
|
161 |
|
|
Serial NVRAM: Symbios and Tekram formats
|
162 |
|
|
|
163 |
|
|
|
164 |
|
|
3. Advantages of this driver for newer chips.
|
165 |
|
|
|
166 |
|
|
3.1 Optimized SCSI SCRIPTS.
|
167 |
|
|
|
168 |
|
|
All chips except the 810, 815 and 825, support new SCSI SCRIPTS instructions
|
169 |
|
|
named LOAD and STORE that allow to move up to 1 DWORD from/to an IO register
|
170 |
|
|
to/from memory much faster that the MOVE MEMORY instruction that is supported
|
171 |
|
|
by the 53c7xx and 53c8xx family.
|
172 |
|
|
|
173 |
|
|
The LOAD/STORE instructions support absolute and DSA relative addressing
|
174 |
|
|
modes. The SCSI SCRIPTS had been entirely rewritten using LOAD/STORE instead
|
175 |
|
|
of MOVE MEMORY instructions.
|
176 |
|
|
|
177 |
|
|
Due to the lack of LOAD/STORE SCRIPTS instructions by earlier chips, this
|
178 |
|
|
driver also incorporates a different SCRIPTS set based on MEMORY MOVE, in
|
179 |
|
|
order to provide support for the entire SYM53C8XX chips family.
|
180 |
|
|
|
181 |
|
|
3.2 New features appeared with the SYM53C896
|
182 |
|
|
|
183 |
|
|
Newer chips (see above) allows handling of the phase mismatch context from
|
184 |
|
|
SCRIPTS (avoids the phase mismatch interrupt that stops the SCSI processor
|
185 |
|
|
until the C code has saved the context of the transfer).
|
186 |
|
|
|
187 |
|
|
The 896 and 1010 chips support 64 bit PCI transactions and addressing,
|
188 |
|
|
while the 895A supports 32 bit PCI transactions and 64 bit addressing.
|
189 |
|
|
The SCRIPTS processor of these chips is not true 64 bit, but uses segment
|
190 |
|
|
registers for bit 32-63. Another interesting feature is that LOAD/STORE
|
191 |
|
|
instructions that address the on-chip RAM (8k) remain internal to the chip.
|
192 |
|
|
|
193 |
|
|
4. Memory mapped I/O versus normal I/O
|
194 |
|
|
|
195 |
|
|
Memory mapped I/O has less latency than normal I/O and is the recommended
|
196 |
|
|
way for doing IO with PCI devices. Memory mapped I/O seems to work fine on
|
197 |
|
|
most hardware configurations, but some poorly designed chipsets may break
|
198 |
|
|
this feature. A configuration option is provided for normal I/O to be
|
199 |
|
|
used but the driver defaults to MMIO.
|
200 |
|
|
|
201 |
|
|
5. Tagged command queueing
|
202 |
|
|
|
203 |
|
|
Queuing more than 1 command at a time to a device allows it to perform
|
204 |
|
|
optimizations based on actual head positions and its mechanical
|
205 |
|
|
characteristics. This feature may also reduce average command latency.
|
206 |
|
|
In order to really gain advantage of this feature, devices must have
|
207 |
|
|
a reasonable cache size (No miracle is to be expected for a low-end
|
208 |
|
|
hard disk with 128 KB or less).
|
209 |
|
|
Some kown old SCSI devices do not properly support tagged command queuing.
|
210 |
|
|
Generally, firmware revisions that fix this kind of problems are available
|
211 |
|
|
at respective vendor web/ftp sites.
|
212 |
|
|
All I can say is that I never have had problem with tagged queuing using
|
213 |
|
|
this driver and its predecessors. Hard disks that behaved correctly for
|
214 |
|
|
me using tagged commands are the following:
|
215 |
|
|
|
216 |
|
|
- IBM S12 0662
|
217 |
|
|
- Conner 1080S
|
218 |
|
|
- Quantum Atlas I
|
219 |
|
|
- Quantum Atlas II
|
220 |
|
|
- Seagate Cheetah I
|
221 |
|
|
- Quantum Viking II
|
222 |
|
|
- IBM DRVS
|
223 |
|
|
- Quantum Atlas IV
|
224 |
|
|
- Seagate Cheetah II
|
225 |
|
|
|
226 |
|
|
If your controller has NVRAM, you can configure this feature per target
|
227 |
|
|
from the user setup tool. The Tekram Setup program allows to tune the
|
228 |
|
|
maximum number of queued commands up to 32. The Symbios Setup only allows
|
229 |
|
|
to enable or disable this feature.
|
230 |
|
|
|
231 |
|
|
The maximum number of simultaneous tagged commands queued to a device
|
232 |
|
|
is currently set to 16 by default. This value is suitable for most SCSI
|
233 |
|
|
disks. With large SCSI disks (>= 2GB, cache >= 512KB, average seek time
|
234 |
|
|
<= 10 ms), using a larger value may give better performances.
|
235 |
|
|
|
236 |
|
|
This driver supports up to 255 commands per device, and but using more than
|
237 |
|
|
64 is generally not worth-while, unless you are using a very large disk or
|
238 |
|
|
disk arrays. It is noticeable that most of recent hard disks seem not to
|
239 |
|
|
accept more than 64 simultaneous commands. So, using more than 64 queued
|
240 |
|
|
commands is probably just resource wasting.
|
241 |
|
|
|
242 |
|
|
If your controller does not have NVRAM or if it is managed by the SDMS
|
243 |
|
|
BIOS/SETUP, you can configure tagged queueing feature and device queue
|
244 |
|
|
depths from the boot command-line. For example:
|
245 |
|
|
|
246 |
|
|
sym53c8xx=tags:4/t2t3q15-t4q7/t1u0q32
|
247 |
|
|
|
248 |
|
|
will set tagged commands queue depths as follow:
|
249 |
|
|
|
250 |
|
|
- target 2 all luns on controller 0 --> 15
|
251 |
|
|
- target 3 all luns on controller 0 --> 15
|
252 |
|
|
- target 4 all luns on controller 0 --> 7
|
253 |
|
|
- target 1 lun 0 on controller 1 --> 32
|
254 |
|
|
- all other target/lun --> 4
|
255 |
|
|
|
256 |
|
|
In some special conditions, some SCSI disk firmwares may return a
|
257 |
|
|
QUEUE FULL status for a SCSI command. This behaviour is managed by the
|
258 |
|
|
driver using the following heuristic:
|
259 |
|
|
|
260 |
|
|
- Each time a QUEUE FULL status is returned, tagged queue depth is reduced
|
261 |
|
|
to the actual number of disconnected commands.
|
262 |
|
|
|
263 |
|
|
- Every 200 successfully completed SCSI commands, if allowed by the
|
264 |
|
|
current limit, the maximum number of queueable commands is incremented.
|
265 |
|
|
|
266 |
|
|
Since QUEUE FULL status reception and handling is resource wasting, the
|
267 |
|
|
driver notifies by default this problem to user by indicating the actual
|
268 |
|
|
number of commands used and their status, as well as its decision on the
|
269 |
|
|
device queue depth change.
|
270 |
|
|
The heuristic used by the driver in handling QUEUE FULL ensures that the
|
271 |
|
|
impact on performances is not too bad. You can get rid of the messages by
|
272 |
|
|
setting verbose level to zero, as follow:
|
273 |
|
|
|
274 |
|
|
1st method: boot your system using 'sym53c8xx=verb:0' option.
|
275 |
|
|
2nd method: apply "setverbose 0" control command to the proc fs entry
|
276 |
|
|
corresponding to your controller after boot-up.
|
277 |
|
|
|
278 |
|
|
6. Parity checking
|
279 |
|
|
|
280 |
|
|
The driver supports SCSI parity checking and PCI bus master parity
|
281 |
|
|
checking. These features must be enabled in order to ensure safe
|
282 |
|
|
data transfers. Some flawed devices or mother boards may have problems
|
283 |
|
|
with parity. The options to defeat parity checking have been removed
|
284 |
|
|
from the driver.
|
285 |
|
|
|
286 |
|
|
7. Profiling information
|
287 |
|
|
|
288 |
|
|
This driver does not provide profiling informations as did its predecessors.
|
289 |
|
|
This feature was not this useful and added complexity to the code.
|
290 |
|
|
As the driver code got more complex, I have decided to remove everything
|
291 |
|
|
that didn't seem actually useful.
|
292 |
|
|
|
293 |
|
|
8. Control commands
|
294 |
|
|
|
295 |
|
|
Control commands can be sent to the driver with write operations to
|
296 |
|
|
the proc SCSI file system. The generic command syntax is the
|
297 |
|
|
following:
|
298 |
|
|
|
299 |
|
|
echo " " >/proc/scsi/sym53c8xx/0
|
300 |
|
|
(assumes controller number is 0)
|
301 |
|
|
|
302 |
|
|
Using "all" for "" parameter with the commands below will
|
303 |
|
|
apply to all targets of the SCSI chain (except the controller).
|
304 |
|
|
|
305 |
|
|
Available commands:
|
306 |
|
|
|
307 |
|
|
8.1 Set minimum synchronous period factor
|
308 |
|
|
|
309 |
|
|
setsync
|
310 |
|
|
|
311 |
|
|
target: target number
|
312 |
|
|
period: minimum synchronous period.
|
313 |
|
|
Maximum speed = 1000/(4*period factor) except for special
|
314 |
|
|
cases below.
|
315 |
|
|
|
316 |
|
|
Specify a period of 0, to force asynchronous transfer mode.
|
317 |
|
|
|
318 |
|
|
9 means 12.5 nano-seconds synchronous period
|
319 |
|
|
10 means 25 nano-seconds synchronous period
|
320 |
|
|
11 means 30 nano-seconds synchronous period
|
321 |
|
|
12 means 50 nano-seconds synchronous period
|
322 |
|
|
|
323 |
|
|
8.2 Set wide size
|
324 |
|
|
|
325 |
|
|
setwide
|
326 |
|
|
|
327 |
|
|
target: target number
|
328 |
|
|
size: 0=8 bits, 1=16bits
|
329 |
|
|
|
330 |
|
|
8.3 Set maximum number of concurrent tagged commands
|
331 |
|
|
|
332 |
|
|
settags
|
333 |
|
|
|
334 |
|
|
target: target number
|
335 |
|
|
tags: number of concurrent tagged commands
|
336 |
|
|
must not be greater than configured (default: 16)
|
337 |
|
|
|
338 |
|
|
8.4 Set debug mode
|
339 |
|
|
|
340 |
|
|
setdebug
|
341 |
|
|
|
342 |
|
|
Available debug flags:
|
343 |
|
|
alloc: print info about memory allocations (ccb, lcb)
|
344 |
|
|
queue: print info about insertions into the command start queue
|
345 |
|
|
result: print sense data on CHECK CONDITION status
|
346 |
|
|
scatter: print info about the scatter process
|
347 |
|
|
scripts: print info about the script binding process
|
348 |
|
|
tiny: print minimal debugging information
|
349 |
|
|
timing: print timing information of the NCR chip
|
350 |
|
|
nego: print information about SCSI negotiations
|
351 |
|
|
phase: print information on script interruptions
|
352 |
|
|
|
353 |
|
|
Use "setdebug" with no argument to reset debug flags.
|
354 |
|
|
|
355 |
|
|
|
356 |
|
|
8.5 Set flag (no_disc)
|
357 |
|
|
|
358 |
|
|
setflag
|
359 |
|
|
|
360 |
|
|
target: target number
|
361 |
|
|
|
362 |
|
|
For the moment, only one flag is available:
|
363 |
|
|
|
364 |
|
|
no_disc: not allow target to disconnect.
|
365 |
|
|
|
366 |
|
|
Do not specify any flag in order to reset the flag. For example:
|
367 |
|
|
- setflag 4
|
368 |
|
|
will reset no_disc flag for target 4, so will allow it disconnections.
|
369 |
|
|
- setflag all
|
370 |
|
|
will allow disconnection for all devices on the SCSI bus.
|
371 |
|
|
|
372 |
|
|
|
373 |
|
|
8.6 Set verbose level
|
374 |
|
|
|
375 |
|
|
setverbose #level
|
376 |
|
|
|
377 |
|
|
The driver default verbose level is 1. This command allows to change
|
378 |
|
|
th driver verbose level after boot-up.
|
379 |
|
|
|
380 |
|
|
8.7 Reset all logical units of a target
|
381 |
|
|
|
382 |
|
|
resetdev
|
383 |
|
|
|
384 |
|
|
target: target number
|
385 |
|
|
The driver will try to send a BUS DEVICE RESET message to the target.
|
386 |
|
|
|
387 |
|
|
8.8 Abort all tasks of all logical units of a target
|
388 |
|
|
|
389 |
|
|
cleardev
|
390 |
|
|
|
391 |
|
|
target: target number
|
392 |
|
|
The driver will try to send a ABORT message to all the logical units
|
393 |
|
|
of the target.
|
394 |
|
|
|
395 |
|
|
|
396 |
|
|
9. Configuration parameters
|
397 |
|
|
|
398 |
|
|
Under kernel configuration tools (make menuconfig, for example), it is
|
399 |
|
|
possible to change some default driver configuration parameters.
|
400 |
|
|
If the firmware of all your devices is perfect enough, all the
|
401 |
|
|
features supported by the driver can be enabled at start-up. However,
|
402 |
|
|
if only one has a flaw for some SCSI feature, you can disable the
|
403 |
|
|
support by the driver of this feature at linux start-up and enable
|
404 |
|
|
this feature after boot-up only for devices that support it safely.
|
405 |
|
|
|
406 |
|
|
Configuration parameters:
|
407 |
|
|
|
408 |
|
|
Use normal IO (default answer: n)
|
409 |
|
|
Answer "y" if you suspect your mother board to not allow memory mapped I/O.
|
410 |
|
|
May slow down performance a little.
|
411 |
|
|
|
412 |
|
|
Default tagged command queue depth (default answer: 16)
|
413 |
|
|
Entering 0 defaults to tagged commands not being used.
|
414 |
|
|
This parameter can be specified from the boot command line.
|
415 |
|
|
|
416 |
|
|
Maximum number of queued commands (default answer: 32)
|
417 |
|
|
This option allows you to specify the maximum number of tagged commands
|
418 |
|
|
that can be queued to a device. The maximum supported value is 255.
|
419 |
|
|
|
420 |
|
|
Synchronous transfers frequency (default answer: 80)
|
421 |
|
|
This option allows you to specify the frequency in MHz the driver
|
422 |
|
|
will use at boot time for synchronous data transfer negotiations.
|
423 |
|
|
|
424 |
|
|
|
425 |
|
|
10. Boot setup commands
|
426 |
|
|
|
427 |
|
|
10.1 Syntax
|
428 |
|
|
|
429 |
|
|
Setup commands can be passed to the driver either at boot time or as
|
430 |
|
|
parameters to modprobe, as described in Documentation/kernel-parameters.txt
|
431 |
|
|
|
432 |
|
|
Example of boot setup command under lilo prompt:
|
433 |
|
|
|
434 |
|
|
lilo: linux root=/dev/sda2 sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 sym53c8xx.debug=0x200
|
435 |
|
|
|
436 |
|
|
- enable tagged commands, up to 4 tagged commands queued.
|
437 |
|
|
- set synchronous negotiation speed to 10 Mega-transfers / second.
|
438 |
|
|
- set DEBUG_NEGO flag.
|
439 |
|
|
|
440 |
|
|
The following command will install the driver module with the same
|
441 |
|
|
options as above.
|
442 |
|
|
|
443 |
|
|
modprobe sym53c8xx cmd_per_lun=4 sync=10 debug=0x200
|
444 |
|
|
|
445 |
|
|
10.2 Available arguments
|
446 |
|
|
|
447 |
|
|
10.2.1 Default number of tagged commands
|
448 |
|
|
cmd_per_lun=0 (or cmd_per_lun=1) tagged command queuing disabled
|
449 |
|
|
cmd_per_lun=#tags (#tags > 1) tagged command queuing enabled
|
450 |
|
|
#tags will be truncated to the max queued commands configuration parameter.
|
451 |
|
|
|
452 |
|
|
10.2.2 Burst max
|
453 |
|
|
burst=0 burst disabled
|
454 |
|
|
burst=255 get burst length from initial IO register settings.
|
455 |
|
|
burst=#x burst enabled (1<<#x burst transfers max)
|
456 |
|
|
#x is an integer value which is log base 2 of the burst transfers max.
|
457 |
|
|
By default the driver uses the maximum value supported by the chip.
|
458 |
|
|
|
459 |
|
|
10.2.3 LED support
|
460 |
|
|
led=1 enable LED support
|
461 |
|
|
led=0 disable LED support
|
462 |
|
|
Do not enable LED support if your scsi board does not use SDMS BIOS.
|
463 |
|
|
(See 'Configuration parameters')
|
464 |
|
|
|
465 |
|
|
10.2.4 Differential mode
|
466 |
|
|
diff=0 never set up diff mode
|
467 |
|
|
diff=1 set up diff mode if BIOS set it
|
468 |
|
|
diff=2 always set up diff mode
|
469 |
|
|
diff=3 set diff mode if GPIO3 is not set
|
470 |
|
|
|
471 |
|
|
10.2.5 IRQ mode
|
472 |
|
|
irqm=0 always open drain
|
473 |
|
|
irqm=1 same as initial settings (assumed BIOS settings)
|
474 |
|
|
irqm=2 always totem pole
|
475 |
|
|
|
476 |
|
|
10.2.6 Check SCSI BUS
|
477 |
|
|
buschk=
|
478 |
|
|
|
479 |
|
|
Available option bits:
|
480 |
|
|
0x0: No check.
|
481 |
|
|
0x1: Check and do not attach the controller on error.
|
482 |
|
|
0x2: Check and just warn on error.
|
483 |
|
|
|
484 |
|
|
10.2.7 Suggest a default SCSI id for hosts
|
485 |
|
|
hostid=255 no id suggested.
|
486 |
|
|
hostid=#x (0 < x < 7) x suggested for hosts SCSI id.
|
487 |
|
|
|
488 |
|
|
If a host SCSI id is available from the NVRAM, the driver will ignore
|
489 |
|
|
any value suggested as boot option. Otherwise, if a suggested value
|
490 |
|
|
different from 255 has been supplied, it will use it. Otherwise, it will
|
491 |
|
|
try to deduce the value previously set in the hardware and use value
|
492 |
|
|
7 if the hardware value is zero.
|
493 |
|
|
|
494 |
|
|
10.2.8 Verbosity level
|
495 |
|
|
verb=0 minimal
|
496 |
|
|
verb=1 normal
|
497 |
|
|
verb=2 too much
|
498 |
|
|
|
499 |
|
|
10.2.9 Debug mode
|
500 |
|
|
debug=0 clear debug flags
|
501 |
|
|
debug=#x set debug flags
|
502 |
|
|
#x is an integer value combining the following power-of-2 values:
|
503 |
|
|
DEBUG_ALLOC 0x1
|
504 |
|
|
DEBUG_PHASE 0x2
|
505 |
|
|
DEBUG_POLL 0x4
|
506 |
|
|
DEBUG_QUEUE 0x8
|
507 |
|
|
DEBUG_RESULT 0x10
|
508 |
|
|
DEBUG_SCATTER 0x20
|
509 |
|
|
DEBUG_SCRIPT 0x40
|
510 |
|
|
DEBUG_TINY 0x80
|
511 |
|
|
DEBUG_TIMING 0x100
|
512 |
|
|
DEBUG_NEGO 0x200
|
513 |
|
|
DEBUG_TAGS 0x400
|
514 |
|
|
DEBUG_FREEZE 0x800
|
515 |
|
|
DEBUG_RESTART 0x1000
|
516 |
|
|
|
517 |
|
|
You can play safely with DEBUG_NEGO. However, some of these flags may
|
518 |
|
|
generate bunches of syslog messages.
|
519 |
|
|
|
520 |
|
|
10.2.10 Settle delay
|
521 |
|
|
settle=n delay for n seconds
|
522 |
|
|
|
523 |
|
|
After a bus reset, the driver will delay for n seconds before talking
|
524 |
|
|
to any device on the bus. The default is 3 seconds and safe mode will
|
525 |
|
|
default it to 10.
|
526 |
|
|
|
527 |
|
|
10.2.11 Serial NVRAM
|
528 |
|
|
NB: option not currently implemented.
|
529 |
|
|
nvram=n do not look for serial NVRAM
|
530 |
|
|
nvram=y test controllers for onboard serial NVRAM
|
531 |
|
|
(alternate binary form)
|
532 |
|
|
nvram=
|
533 |
|
|
0x01 look for NVRAM (equivalent to nvram=y)
|
534 |
|
|
0x02 ignore NVRAM "Synchronous negotiation" parameters for all devices
|
535 |
|
|
0x04 ignore NVRAM "Wide negotiation" parameter for all devices
|
536 |
|
|
0x08 ignore NVRAM "Scan at boot time" parameter for all devices
|
537 |
|
|
0x80 also attach controllers set to OFF in the NVRAM (sym53c8xx only)
|
538 |
|
|
|
539 |
|
|
10.2.12 Exclude a host from being attached
|
540 |
|
|
excl=,...
|
541 |
|
|
|
542 |
|
|
Prevent host at a given io address from being attached.
|
543 |
|
|
For example 'excl=0xb400,0xc000' indicate to the
|
544 |
|
|
driver not to attach hosts at address 0xb400 and 0xc000.
|
545 |
|
|
|
546 |
|
|
10.3 Converting from old style options
|
547 |
|
|
|
548 |
|
|
Previously, the sym2 driver accepted arguments of the form
|
549 |
|
|
sym53c8xx=tags:4,sync:10,debug:0x200
|
550 |
|
|
|
551 |
|
|
As a result of the new module parameters, this is no longer available.
|
552 |
|
|
Most of the options have remained the same, but tags has become
|
553 |
|
|
cmd_per_lun to reflect its different purposes. The sample above would
|
554 |
|
|
be specified as:
|
555 |
|
|
modprobe sym53c8xx cmd_per_lun=4 sync=10 debug=0x200
|
556 |
|
|
|
557 |
|
|
or on the kernel boot line as:
|
558 |
|
|
sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 sym53c8xx.debug=0x200
|
559 |
|
|
|
560 |
|
|
10.4 SCSI BUS checking boot option.
|
561 |
|
|
|
562 |
|
|
When this option is set to a non-zero value, the driver checks SCSI lines
|
563 |
|
|
logic state, 100 micro-seconds after having asserted the SCSI RESET line.
|
564 |
|
|
The driver just reads SCSI lines and checks all lines read FALSE except RESET.
|
565 |
|
|
Since SCSI devices shall release the BUS at most 800 nano-seconds after SCSI
|
566 |
|
|
RESET has been asserted, any signal to TRUE may indicate a SCSI BUS problem.
|
567 |
|
|
Unfortunately, the following common SCSI BUS problems are not detected:
|
568 |
|
|
- Only 1 terminator installed.
|
569 |
|
|
- Misplaced terminators.
|
570 |
|
|
- Bad quality terminators.
|
571 |
|
|
On the other hand, either bad cabling, broken devices, not conformant
|
572 |
|
|
devices, ... may cause a SCSI signal to be wrong when te driver reads it.
|
573 |
|
|
|
574 |
|
|
15. SCSI problem troubleshooting
|
575 |
|
|
|
576 |
|
|
15.1 Problem tracking
|
577 |
|
|
|
578 |
|
|
Most SCSI problems are due to a non conformant SCSI bus or too buggy
|
579 |
|
|
devices. If unfortunately you have SCSI problems, you can check the
|
580 |
|
|
following things:
|
581 |
|
|
|
582 |
|
|
- SCSI bus cables
|
583 |
|
|
- terminations at both end of the SCSI chain
|
584 |
|
|
- linux syslog messages (some of them may help you)
|
585 |
|
|
|
586 |
|
|
If you do not find the source of problems, you can configure the
|
587 |
|
|
driver or devices in the NVRAM with minimal features.
|
588 |
|
|
|
589 |
|
|
- only asynchronous data transfers
|
590 |
|
|
- tagged commands disabled
|
591 |
|
|
- disconnections not allowed
|
592 |
|
|
|
593 |
|
|
Now, if your SCSI bus is ok, your system has every chance to work
|
594 |
|
|
with this safe configuration but performances will not be optimal.
|
595 |
|
|
|
596 |
|
|
If it still fails, then you can send your problem description to
|
597 |
|
|
appropriate mailing lists or news-groups. Send me a copy in order to
|
598 |
|
|
be sure I will receive it. Obviously, a bug in the driver code is
|
599 |
|
|
possible.
|
600 |
|
|
|
601 |
|
|
My current email address: Gerard Roudier
|
602 |
|
|
|
603 |
|
|
Allowing disconnections is important if you use several devices on
|
604 |
|
|
your SCSI bus but often causes problems with buggy devices.
|
605 |
|
|
Synchronous data transfers increases throughput of fast devices like
|
606 |
|
|
hard disks. Good SCSI hard disks with a large cache gain advantage of
|
607 |
|
|
tagged commands queuing.
|
608 |
|
|
|
609 |
|
|
15.2 Understanding hardware error reports
|
610 |
|
|
|
611 |
|
|
When the driver detects an unexpected error condition, it may display a
|
612 |
|
|
message of the following pattern.
|
613 |
|
|
|
614 |
|
|
sym0:1: ERROR (0:48) (1-21-65) (f/95/0) @ (script 7c0:19000000).
|
615 |
|
|
sym0: script cmd = 19000000
|
616 |
|
|
sym0: regdump: da 10 80 95 47 0f 01 07 75 01 81 21 80 01 09 00.
|
617 |
|
|
|
618 |
|
|
Some fields in such a message may help you understand the cause of the
|
619 |
|
|
problem, as follows:
|
620 |
|
|
|
621 |
|
|
sym0:1: ERROR (0:48) (1-21-65) (f/95/0) @ (script 7c0:19000000).
|
622 |
|
|
.....A.........B.C....D.E..F....G.H..I.......J.....K...L.......
|
623 |
|
|
|
624 |
|
|
Field A : target number.
|
625 |
|
|
SCSI ID of the device the controller was talking with at the moment the
|
626 |
|
|
error occurs.
|
627 |
|
|
|
628 |
|
|
Field B : DSTAT io register (DMA STATUS)
|
629 |
|
|
Bit 0x40 : MDPE Master Data Parity Error
|
630 |
|
|
Data parity error detected on the PCI BUS.
|
631 |
|
|
Bit 0x20 : BF Bus Fault
|
632 |
|
|
PCI bus fault condition detected
|
633 |
|
|
Bit 0x01 : IID Illegal Instruction Detected
|
634 |
|
|
Set by the chip when it detects an Illegal Instruction format
|
635 |
|
|
on some condition that makes an instruction illegal.
|
636 |
|
|
Bit 0x80 : DFE Dma Fifo Empty
|
637 |
|
|
Pure status bit that does not indicate an error.
|
638 |
|
|
If the reported DSTAT value contains a combination of MDPE (0x40),
|
639 |
|
|
BF (0x20), then the cause may be likely due to a PCI BUS problem.
|
640 |
|
|
|
641 |
|
|
Field C : SIST io register (SCSI Interrupt Status)
|
642 |
|
|
Bit 0x08 : SGE SCSI GROSS ERROR
|
643 |
|
|
Indicates that the chip detected a severe error condition
|
644 |
|
|
on the SCSI BUS that prevents the SCSI protocol from functioning
|
645 |
|
|
properly.
|
646 |
|
|
Bit 0x04 : UDC Unexpected Disconnection
|
647 |
|
|
Indicates that the device released the SCSI BUS when the chip
|
648 |
|
|
was not expecting this to happen. A device may behave so to
|
649 |
|
|
indicate the SCSI initiator that an error condition not reportable using the SCSI protocol has occurred.
|
650 |
|
|
Bit 0x02 : RST SCSI BUS Reset
|
651 |
|
|
Generally SCSI targets do not reset the SCSI BUS, although any
|
652 |
|
|
device on the BUS can reset it at any time.
|
653 |
|
|
Bit 0x01 : PAR Parity
|
654 |
|
|
SCSI parity error detected.
|
655 |
|
|
On a faulty SCSI BUS, any error condition among SGE (0x08), UDC (0x04) and
|
656 |
|
|
PAR (0x01) may be detected by the chip. If your SCSI system sometimes
|
657 |
|
|
encounters such error conditions, especially SCSI GROSS ERROR, then a SCSI
|
658 |
|
|
BUS problem is likely the cause of these errors.
|
659 |
|
|
|
660 |
|
|
For fields D,E,F,G and H, you may look into the sym53c8xx_defs.h file
|
661 |
|
|
that contains some minimal comments on IO register bits.
|
662 |
|
|
Field D : SOCL Scsi Output Control Latch
|
663 |
|
|
This register reflects the state of the SCSI control lines the
|
664 |
|
|
chip want to drive or compare against.
|
665 |
|
|
Field E : SBCL Scsi Bus Control Lines
|
666 |
|
|
Actual value of control lines on the SCSI BUS.
|
667 |
|
|
Field F : SBDL Scsi Bus Data Lines
|
668 |
|
|
Actual value of data lines on the SCSI BUS.
|
669 |
|
|
Field G : SXFER SCSI Transfer
|
670 |
|
|
Contains the setting of the Synchronous Period for output and
|
671 |
|
|
the current Synchronous offset (offset 0 means asynchronous).
|
672 |
|
|
Field H : SCNTL3 Scsi Control Register 3
|
673 |
|
|
Contains the setting of timing values for both asynchronous and
|
674 |
|
|
synchronous data transfers.
|
675 |
|
|
Field I : SCNTL4 Scsi Control Register 4
|
676 |
|
|
Only meaningful for 53C1010 Ultra3 controllers.
|
677 |
|
|
|
678 |
|
|
Understanding Fields J, K, L and dumps requires to have good knowledge of
|
679 |
|
|
SCSI standards, chip cores functionnals and internal driver data structures.
|
680 |
|
|
You are not required to decode and understand them, unless you want to help
|
681 |
|
|
maintain the driver code.
|
682 |
|
|
|
683 |
|
|
17. Serial NVRAM (added by Richard Waltham: dormouse@farsrobt.demon.co.uk)
|
684 |
|
|
|
685 |
|
|
17.1 Features
|
686 |
|
|
|
687 |
|
|
Enabling serial NVRAM support enables detection of the serial NVRAM included
|
688 |
|
|
on Symbios and some Symbios compatible host adaptors, and Tekram boards. The
|
689 |
|
|
serial NVRAM is used by Symbios and Tekram to hold set up parameters for the
|
690 |
|
|
host adaptor and it's attached drives.
|
691 |
|
|
|
692 |
|
|
The Symbios NVRAM also holds data on the boot order of host adaptors in a
|
693 |
|
|
system with more than one host adaptor. This information is no longer used
|
694 |
|
|
as it's fundamentally incompatible with the hotplug PCI model.
|
695 |
|
|
|
696 |
|
|
Tekram boards using Symbios chips, DC390W/F/U, which have NVRAM are detected
|
697 |
|
|
and this is used to distinguish between Symbios compatible and Tekram host
|
698 |
|
|
adaptors. This is used to disable the Symbios compatible "diff" setting
|
699 |
|
|
incorrectly set on Tekram boards if the CONFIG_SCSI_53C8XX_SYMBIOS_COMPAT
|
700 |
|
|
configuration parameter is set enabling both Symbios and Tekram boards to be
|
701 |
|
|
used together with the Symbios cards using all their features, including
|
702 |
|
|
"diff" support. ("led pin" support for Symbios compatible cards can remain
|
703 |
|
|
enabled when using Tekram cards. It does nothing useful for Tekram host
|
704 |
|
|
adaptors but does not cause problems either.)
|
705 |
|
|
|
706 |
|
|
The parameters the driver is able to get from the NVRAM depend on the
|
707 |
|
|
data format used, as follow:
|
708 |
|
|
|
709 |
|
|
Tekram format Symbios format
|
710 |
|
|
General and host parameters
|
711 |
|
|
Boot order N Y
|
712 |
|
|
Host SCSI ID Y Y
|
713 |
|
|
SCSI parity checking Y Y
|
714 |
|
|
Verbose boot messages N Y
|
715 |
|
|
SCSI devices parameters
|
716 |
|
|
Synchronous transfer speed Y Y
|
717 |
|
|
Wide 16 / Narrow Y Y
|
718 |
|
|
Tagged Command Queuing enabled Y Y
|
719 |
|
|
Disconnections enabled Y Y
|
720 |
|
|
Scan at boot time N Y
|
721 |
|
|
|
722 |
|
|
In order to speed up the system boot, for each device configured without
|
723 |
|
|
the "scan at boot time" option, the driver forces an error on the
|
724 |
|
|
first TEST UNIT READY command received for this device.
|
725 |
|
|
|
726 |
|
|
|
727 |
|
|
17.2 Symbios NVRAM layout
|
728 |
|
|
|
729 |
|
|
typical data at NVRAM address 0x100 (53c810a NVRAM)
|
730 |
|
|
-----------------------------------------------------------
|
731 |
|
|
00 00
|
732 |
|
|
64 01
|
733 |
|
|
8e 0b
|
734 |
|
|
|
735 |
|
|
00 30 00 00 00 00 07 00 00 00 00 00 00 00 07 04 10 04 00 00
|
736 |
|
|
|
737 |
|
|
04 00 0f 00 00 10 00 50 00 00 01 00 00 62
|
738 |
|
|
04 00 03 00 00 10 00 58 00 00 01 00 00 63
|
739 |
|
|
04 00 01 00 00 10 00 48 00 00 01 00 00 61
|
740 |
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
741 |
|
|
|
742 |
|
|
0f 00 08 08 64 00 0a 00
|
743 |
|
|
0f 00 08 08 64 00 0a 00
|
744 |
|
|
0f 00 08 08 64 00 0a 00
|
745 |
|
|
0f 00 08 08 64 00 0a 00
|
746 |
|
|
0f 00 08 08 64 00 0a 00
|
747 |
|
|
0f 00 08 08 64 00 0a 00
|
748 |
|
|
0f 00 08 08 64 00 0a 00
|
749 |
|
|
0f 00 08 08 64 00 0a 00
|
750 |
|
|
|
751 |
|
|
0f 00 08 08 64 00 0a 00
|
752 |
|
|
0f 00 08 08 64 00 0a 00
|
753 |
|
|
0f 00 08 08 64 00 0a 00
|
754 |
|
|
0f 00 08 08 64 00 0a 00
|
755 |
|
|
0f 00 08 08 64 00 0a 00
|
756 |
|
|
0f 00 08 08 64 00 0a 00
|
757 |
|
|
0f 00 08 08 64 00 0a 00
|
758 |
|
|
0f 00 08 08 64 00 0a 00
|
759 |
|
|
|
760 |
|
|
00 00 00 00 00 00 00 00
|
761 |
|
|
00 00 00 00 00 00 00 00
|
762 |
|
|
00 00 00 00 00 00 00 00
|
763 |
|
|
00 00 00 00 00 00 00 00
|
764 |
|
|
00 00 00 00 00 00 00 00
|
765 |
|
|
00 00 00 00 00 00 00 00
|
766 |
|
|
00 00 00 00 00 00 00 00
|
767 |
|
|
00 00 00 00 00 00 00 00
|
768 |
|
|
|
769 |
|
|
00 00 00 00 00 00 00 00
|
770 |
|
|
00 00 00 00 00 00 00 00
|
771 |
|
|
00 00 00 00 00 00 00 00
|
772 |
|
|
00 00 00 00 00 00 00 00
|
773 |
|
|
00 00 00 00 00 00 00 00
|
774 |
|
|
00 00 00 00 00 00 00 00
|
775 |
|
|
00 00 00 00 00 00 00 00
|
776 |
|
|
00 00 00 00 00 00 00 00
|
777 |
|
|
|
778 |
|
|
00 00 00 00 00 00 00 00
|
779 |
|
|
00 00 00 00 00 00 00 00
|
780 |
|
|
00 00 00 00 00 00 00 00
|
781 |
|
|
|
782 |
|
|
fe fe
|
783 |
|
|
00 00
|
784 |
|
|
00 00
|
785 |
|
|
-----------------------------------------------------------
|
786 |
|
|
NVRAM layout details
|
787 |
|
|
|
788 |
|
|
NVRAM Address 0x000-0x0ff not used
|
789 |
|
|
0x100-0x26f initialised data
|
790 |
|
|
0x270-0x7ff not used
|
791 |
|
|
|
792 |
|
|
general layout
|
793 |
|
|
|
794 |
|
|
header - 6 bytes,
|
795 |
|
|
data - 356 bytes (checksum is byte sum of this data)
|
796 |
|
|
trailer - 6 bytes
|
797 |
|
|
---
|
798 |
|
|
total 368 bytes
|
799 |
|
|
|
800 |
|
|
data area layout
|
801 |
|
|
|
802 |
|
|
controller set up - 20 bytes
|
803 |
|
|
boot configuration - 56 bytes (4x14 bytes)
|
804 |
|
|
device set up - 128 bytes (16x8 bytes)
|
805 |
|
|
unused (spare?) - 152 bytes (19x8 bytes)
|
806 |
|
|
---
|
807 |
|
|
total 356 bytes
|
808 |
|
|
|
809 |
|
|
-----------------------------------------------------------
|
810 |
|
|
header
|
811 |
|
|
|
812 |
|
|
00 00 - ?? start marker
|
813 |
|
|
64 01 - byte count (lsb/msb excludes header/trailer)
|
814 |
|
|
8e 0b - checksum (lsb/msb excludes header/trailer)
|
815 |
|
|
-----------------------------------------------------------
|
816 |
|
|
controller set up
|
817 |
|
|
|
818 |
|
|
00 30 00 00 00 00 07 00 00 00 00 00 00 00 07 04 10 04 00 00
|
819 |
|
|
| | | |
|
820 |
|
|
| | | -- host ID
|
821 |
|
|
| | |
|
822 |
|
|
| | --Removable Media Support
|
823 |
|
|
| | 0x00 = none
|
824 |
|
|
| | 0x01 = Bootable Device
|
825 |
|
|
| | 0x02 = All with Media
|
826 |
|
|
| |
|
827 |
|
|
| --flag bits 2
|
828 |
|
|
| 0x00000001= scan order hi->low
|
829 |
|
|
| (default 0x00 - scan low->hi)
|
830 |
|
|
--flag bits 1
|
831 |
|
|
0x00000001 scam enable
|
832 |
|
|
0x00000010 parity enable
|
833 |
|
|
0x00000100 verbose boot msgs
|
834 |
|
|
|
835 |
|
|
remaining bytes unknown - they do not appear to change in my
|
836 |
|
|
current set up for any of the controllers.
|
837 |
|
|
|
838 |
|
|
default set up is identical for 53c810a and 53c875 NVRAM
|
839 |
|
|
(Removable Media added Symbios BIOS version 4.09)
|
840 |
|
|
-----------------------------------------------------------
|
841 |
|
|
boot configuration
|
842 |
|
|
|
843 |
|
|
boot order set by order of the devices in this table
|
844 |
|
|
|
845 |
|
|
04 00 0f 00 00 10 00 50 00 00 01 00 00 62 -- 1st controller
|
846 |
|
|
04 00 03 00 00 10 00 58 00 00 01 00 00 63 2nd controller
|
847 |
|
|
04 00 01 00 00 10 00 48 00 00 01 00 00 61 3rd controller
|
848 |
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 4th controller
|
849 |
|
|
| | | | | | | |
|
850 |
|
|
| | | | | | ---- PCI io port adr
|
851 |
|
|
| | | | | --0x01 init/scan at boot time
|
852 |
|
|
| | | | --PCI device/function number (0xdddddfff)
|
853 |
|
|
| | ----- ?? PCI vendor ID (lsb/msb)
|
854 |
|
|
----PCI device ID (lsb/msb)
|
855 |
|
|
|
856 |
|
|
?? use of this data is a guess but seems reasonable
|
857 |
|
|
|
858 |
|
|
remaining bytes unknown - they do not appear to change in my
|
859 |
|
|
current set up
|
860 |
|
|
|
861 |
|
|
default set up is identical for 53c810a and 53c875 NVRAM
|
862 |
|
|
-----------------------------------------------------------
|
863 |
|
|
device set up (up to 16 devices - includes controller)
|
864 |
|
|
|
865 |
|
|
0f 00 08 08 64 00 0a 00 - id 0
|
866 |
|
|
0f 00 08 08 64 00 0a 00
|
867 |
|
|
0f 00 08 08 64 00 0a 00
|
868 |
|
|
0f 00 08 08 64 00 0a 00
|
869 |
|
|
0f 00 08 08 64 00 0a 00
|
870 |
|
|
0f 00 08 08 64 00 0a 00
|
871 |
|
|
0f 00 08 08 64 00 0a 00
|
872 |
|
|
0f 00 08 08 64 00 0a 00
|
873 |
|
|
|
874 |
|
|
0f 00 08 08 64 00 0a 00
|
875 |
|
|
0f 00 08 08 64 00 0a 00
|
876 |
|
|
0f 00 08 08 64 00 0a 00
|
877 |
|
|
0f 00 08 08 64 00 0a 00
|
878 |
|
|
0f 00 08 08 64 00 0a 00
|
879 |
|
|
0f 00 08 08 64 00 0a 00
|
880 |
|
|
0f 00 08 08 64 00 0a 00
|
881 |
|
|
0f 00 08 08 64 00 0a 00 - id 15
|
882 |
|
|
| | | | | |
|
883 |
|
|
| | | | ----timeout (lsb/msb)
|
884 |
|
|
| | | --synch period (0x?? 40 Mtrans/sec- fast 40) (probably 0x28)
|
885 |
|
|
| | | (0x30 20 Mtrans/sec- fast 20)
|
886 |
|
|
| | | (0x64 10 Mtrans/sec- fast )
|
887 |
|
|
| | | (0xc8 5 Mtrans/sec)
|
888 |
|
|
| | | (0x00 asynchronous)
|
889 |
|
|
| | -- ?? max sync offset (0x08 in NVRAM on 53c810a)
|
890 |
|
|
| | (0x10 in NVRAM on 53c875)
|
891 |
|
|
| --device bus width (0x08 narrow)
|
892 |
|
|
| (0x10 16 bit wide)
|
893 |
|
|
--flag bits
|
894 |
|
|
0x00000001 - disconnect enabled
|
895 |
|
|
0x00000010 - scan at boot time
|
896 |
|
|
0x00000100 - scan luns
|
897 |
|
|
0x00001000 - queue tags enabled
|
898 |
|
|
|
899 |
|
|
remaining bytes unknown - they do not appear to change in my
|
900 |
|
|
current set up
|
901 |
|
|
|
902 |
|
|
?? use of this data is a guess but seems reasonable
|
903 |
|
|
(but it could be max bus width)
|
904 |
|
|
|
905 |
|
|
default set up for 53c810a NVRAM
|
906 |
|
|
default set up for 53c875 NVRAM - bus width - 0x10
|
907 |
|
|
- sync offset ? - 0x10
|
908 |
|
|
- sync period - 0x30
|
909 |
|
|
-----------------------------------------------------------
|
910 |
|
|
?? spare device space (32 bit bus ??)
|
911 |
|
|
|
912 |
|
|
00 00 00 00 00 00 00 00 (19x8bytes)
|
913 |
|
|
.
|
914 |
|
|
.
|
915 |
|
|
00 00 00 00 00 00 00 00
|
916 |
|
|
|
917 |
|
|
default set up is identical for 53c810a and 53c875 NVRAM
|
918 |
|
|
-----------------------------------------------------------
|
919 |
|
|
trailer
|
920 |
|
|
|
921 |
|
|
fe fe - ? end marker ?
|
922 |
|
|
00 00
|
923 |
|
|
00 00
|
924 |
|
|
|
925 |
|
|
default set up is identical for 53c810a and 53c875 NVRAM
|
926 |
|
|
-----------------------------------------------------------
|
927 |
|
|
|
928 |
|
|
|
929 |
|
|
|
930 |
|
|
17.3 Tekram NVRAM layout
|
931 |
|
|
|
932 |
|
|
nvram 64x16 (1024 bit)
|
933 |
|
|
|
934 |
|
|
Drive settings
|
935 |
|
|
|
936 |
|
|
Drive ID 0-15 (addr 0x0yyyy0 = device setup, yyyy = ID)
|
937 |
|
|
(addr 0x0yyyy1 = 0x0000)
|
938 |
|
|
|
939 |
|
|
x x x x x x x x x x x x x x x x
|
940 |
|
|
| | | | | | | | |
|
941 |
|
|
| | | | | | | | ----- parity check 0 - off
|
942 |
|
|
| | | | | | | | 1 - on
|
943 |
|
|
| | | | | | | |
|
944 |
|
|
| | | | | | | ------- sync neg 0 - off
|
945 |
|
|
| | | | | | | 1 - on
|
946 |
|
|
| | | | | | |
|
947 |
|
|
| | | | | | --------- disconnect 0 - off
|
948 |
|
|
| | | | | | 1 - on
|
949 |
|
|
| | | | | |
|
950 |
|
|
| | | | | ----------- start cmd 0 - off
|
951 |
|
|
| | | | | 1 - on
|
952 |
|
|
| | | | |
|
953 |
|
|
| | | | -------------- tagged cmds 0 - off
|
954 |
|
|
| | | | 1 - on
|
955 |
|
|
| | | |
|
956 |
|
|
| | | ---------------- wide neg 0 - off
|
957 |
|
|
| | | 1 - on
|
958 |
|
|
| | |
|
959 |
|
|
--------------------------- sync rate 0 - 10.0 Mtrans/sec
|
960 |
|
|
1 - 8.0
|
961 |
|
|
2 - 6.6
|
962 |
|
|
3 - 5.7
|
963 |
|
|
4 - 5.0
|
964 |
|
|
5 - 4.0
|
965 |
|
|
6 - 3.0
|
966 |
|
|
7 - 2.0
|
967 |
|
|
7 - 2.0
|
968 |
|
|
8 - 20.0
|
969 |
|
|
9 - 16.7
|
970 |
|
|
a - 13.9
|
971 |
|
|
b - 11.9
|
972 |
|
|
|
973 |
|
|
Global settings
|
974 |
|
|
|
975 |
|
|
Host flags 0 (addr 0x100000, 32)
|
976 |
|
|
|
977 |
|
|
x x x x x x x x x x x x x x x x
|
978 |
|
|
| | | | | | | | | | | |
|
979 |
|
|
| | | | | | | | ----------- host ID 0x00 - 0x0f
|
980 |
|
|
| | | | | | | |
|
981 |
|
|
| | | | | | | ----------------------- support for 0 - off
|
982 |
|
|
| | | | | | | > 2 drives 1 - on
|
983 |
|
|
| | | | | | |
|
984 |
|
|
| | | | | | ------------------------- support drives 0 - off
|
985 |
|
|
| | | | | | > 1Gbytes 1 - on
|
986 |
|
|
| | | | | |
|
987 |
|
|
| | | | | --------------------------- bus reset on 0 - off
|
988 |
|
|
| | | | | power on 1 - on
|
989 |
|
|
| | | | |
|
990 |
|
|
| | | | ----------------------------- active neg 0 - off
|
991 |
|
|
| | | | 1 - on
|
992 |
|
|
| | | |
|
993 |
|
|
| | | -------------------------------- imm seek 0 - off
|
994 |
|
|
| | | 1 - on
|
995 |
|
|
| | |
|
996 |
|
|
| | ---------------------------------- scan luns 0 - off
|
997 |
|
|
| | 1 - on
|
998 |
|
|
| |
|
999 |
|
|
-------------------------------------- removable 0 - disable
|
1000 |
|
|
as BIOS dev 1 - boot device
|
1001 |
|
|
2 - all
|
1002 |
|
|
|
1003 |
|
|
Host flags 1 (addr 0x100001, 33)
|
1004 |
|
|
|
1005 |
|
|
x x x x x x x x x x x x x x x x
|
1006 |
|
|
| | | | | |
|
1007 |
|
|
| | | --------- boot delay 0 - 3 sec
|
1008 |
|
|
| | | 1 - 5
|
1009 |
|
|
| | | 2 - 10
|
1010 |
|
|
| | | 3 - 20
|
1011 |
|
|
| | | 4 - 30
|
1012 |
|
|
| | | 5 - 60
|
1013 |
|
|
| | | 6 - 120
|
1014 |
|
|
| | |
|
1015 |
|
|
--------------------------- max tag cmds 0 - 2
|
1016 |
|
|
1 - 4
|
1017 |
|
|
2 - 8
|
1018 |
|
|
3 - 16
|
1019 |
|
|
4 - 32
|
1020 |
|
|
|
1021 |
|
|
Host flags 2 (addr 0x100010, 34)
|
1022 |
|
|
|
1023 |
|
|
x x x x x x x x x x x x x x x x
|
1024 |
|
|
|
|
1025 |
|
|
----- F2/F6 enable 0 - off ???
|
1026 |
|
|
1 - on ???
|
1027 |
|
|
|
1028 |
|
|
checksum (addr 0x111111)
|
1029 |
|
|
|
1030 |
|
|
checksum = 0x1234 - (sum addr 0-63)
|
1031 |
|
|
|
1032 |
|
|
----------------------------------------------------------------------------
|
1033 |
|
|
|
1034 |
|
|
default nvram data:
|
1035 |
|
|
|
1036 |
|
|
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
|
1037 |
|
|
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
|
1038 |
|
|
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
|
1039 |
|
|
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
|
1040 |
|
|
|
1041 |
|
|
0x0f07 0x0400 0x0001 0x0000 0x0000 0x0000 0x0000 0x0000
|
1042 |
|
|
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
|
1043 |
|
|
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
|
1044 |
|
|
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0xfbbc
|
1045 |
|
|
|
1046 |
|
|
|
1047 |
|
|
===============================================================================
|
1048 |
|
|
End of Linux SYM-2 driver documentation file
|