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Rev 1275 → Rev 1765

/sg.h
0,0 → 1,335
#ifndef _SCSI_GENERIC_H
#define _SCSI_GENERIC_H
 
/*
History:
Started: Aug 9 by Lawrence Foard (entropy@world.std.com), to allow user
process control of SCSI devices.
Development Sponsored by Killy Corp. NY NY
Original driver (sg.h):
* Copyright (C) 1992 Lawrence Foard
Version 2 and 3 extensions to driver:
* Copyright (C) 1998 - 2003 Douglas Gilbert
 
Version: 3.1.25 (20030529)
This version is for 2.4 series kernels.
 
Changes since 3.1.24 (20020505)
- fix side effect introduced by last "off by one" fix
Changes since 3.1.23 (20020318)
- off by one fix for last scatter gather element
- zero buffer obtained for non-root users
Changes since 3.1.22 (20011208)
- change EACCES to EPERM when O_RDONLY is insufficient
- suppress newlines in host string ( /proc/scsi/sg/host_strs output)
- fix xfer direction, old interface, short reply_len [Travers Carter]
Changes since 3.1.21 (20011029)
- add support for SG_FLAG_MMAP_IO [permit mmap() on sg devices]
- update documentation pointers in this header
- put KERNEL_VERSION macros around code that breaks early 2.4 series
- fix use count for multiple queued requests on closed fd
- switch back to alloc_kiovec()
Changes since 3.1.20 (20010814)
- use alloc_kiovec_sz() to speed dio [set num_buffer_heads==0]
- changes to cope with larger scatter gather element sizes
- clean up some printk()s
- add MODULE_LICENSE("GPL") [in a 3.1.20 subversion]
- fix race around generic_unplug_device() [in a 3.1.20 subversion]
Changes since 3.1.19 (20010623)
- add SG_GET_ACCESS_COUNT ioctl
- make open() increment and close() decrement access_count
- only register first 256 devices, reject subsequent devices
Changes since 3.1.18 (20010505)
- fix bug that caused long wait when large buffer requested
- fix leak in error case of sg_new_read() [report: Eric Barton]
- add 'online' column to /proc/scsi/sg/devices
Changes since 3.1.17 (20000921)
- add CAP_SYS_RAWIO capability for sensitive stuff
- compile in dio stuff, procfs 'allow_dio' defaulted off (0)
- make premature close and detach more robust
- lun masked into commands <= SCSI_2
- poll() and async notification now yield POLL_HUP on detach
- various 3rd party tweaks tracking lk 2.4 internal changes
 
Map of SG verions to the Linux kernels in which they appear:
---------- ----------------------------------
original all kernels < 2.2.6
2.1.40 2.2.20
3.0.x optional version 3 sg driver for 2.2 series
3.1.17++ 2.4.0++
 
Major new features in SG 3.x driver (cf SG 2.x drivers)
- SG_IO ioctl() combines function if write() and read()
- new interface (sg_io_hdr_t) but still supports old interface
- scatter/gather in user space, direct IO, and mmap supported
 
The normal action of this driver is to use the adapter (HBA) driver to DMA
data into kernel buffers and then use the CPU to copy the data into the
user space (vice versa for writes). That is called "indirect" IO due to
the double handling of data. There are two methods offered to remove the
redundant copy: 1) direct IO which uses the kernel kiobuf mechanism and
2) using the mmap() system call to map the reserve buffer (this driver has
one reserve buffer per fd) into the user space. Both have their advantages.
In terms of absolute speed mmap() is faster. If speed is not a concern,
indirect IO should be fine. Read the documentation for more information.
 
** N.B. To use direct IO 'echo 1 > /proc/scsi/sg/allow_dio' may be
needed. That pseudo file's content is defaulted to 0. **
Historical note: this SCSI pass-through driver has been known as "sg" for
a decade. In broader kernel discussions "sg" is used to refer to scatter
gather techniques. The context should clarify which "sg" is referred to.
 
Documentation
=============
A web site for the SG device driver can be found at:
http://www.torque.net/sg [alternatively check the MAINTAINERS file]
The documentation for the sg version 3 driver can be found at:
http://www.torque.net/sg/p/sg_v3_ho.html
This is a rendering from DocBook source [change the extension to "sgml"
or "xml"]. There are renderings in "ps", "pdf", "rtf" and "txt" (soon).
 
The older, version 2 documents discuss the original sg interface in detail:
http://www.torque.net/sg/p/scsi-generic.txt
http://www.torque.net/sg/p/scsi-generic_long.txt
A version of this document (potentially out of date) may also be found in
the kernel source tree, probably at:
/usr/src/linux/Documentation/scsi-generic.txt .
 
Utility and test programs are available at the sg web site. They are
bundled as sg_utils (for the lk 2.2 series) and sg3_utils (for the
lk 2.4 series).
 
There is a HOWTO on the Linux SCSI subsystem in the lk 2.4 series at:
http://www.linuxdoc.org/HOWTO/SCSI-2.4-HOWTO
*/
 
 
/* New interface introduced in the 3.x SG drivers follows */
 
typedef struct sg_iovec /* same structure as used by readv() Linux system */
{ /* call. It defines one scatter-gather element. */
void * iov_base; /* Starting address */
size_t iov_len; /* Length in bytes */
} sg_iovec_t;
 
 
typedef struct sg_io_hdr
{
int interface_id; /* [i] 'S' for SCSI generic (required) */
int dxfer_direction; /* [i] data transfer direction */
unsigned char cmd_len; /* [i] SCSI command length ( <= 16 bytes) */
unsigned char mx_sb_len; /* [i] max length to write to sbp */
unsigned short iovec_count; /* [i] 0 implies no scatter gather */
unsigned int dxfer_len; /* [i] byte count of data transfer */
void * dxferp; /* [i], [*io] points to data transfer memory
or scatter gather list */
unsigned char * cmdp; /* [i], [*i] points to command to perform */
unsigned char * sbp; /* [i], [*o] points to sense_buffer memory */
unsigned int timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */
unsigned int flags; /* [i] 0 -> default, see SG_FLAG... */
int pack_id; /* [i->o] unused internally (normally) */
void * usr_ptr; /* [i->o] unused internally */
unsigned char status; /* [o] scsi status */
unsigned char masked_status;/* [o] shifted, masked scsi status */
unsigned char msg_status; /* [o] messaging level data (optional) */
unsigned char sb_len_wr; /* [o] byte count actually written to sbp */
unsigned short host_status; /* [o] errors from host adapter */
unsigned short driver_status;/* [o] errors from software driver */
int resid; /* [o] dxfer_len - actual_transferred */
unsigned int duration; /* [o] time taken by cmd (unit: millisec) */
unsigned int info; /* [o] auxiliary information */
} sg_io_hdr_t; /* 64 bytes long (on i386) */
 
/* Use negative values to flag difference from original sg_header structure */
#define SG_DXFER_NONE (-1) /* e.g. a SCSI Test Unit Ready command */
#define SG_DXFER_TO_DEV (-2) /* e.g. a SCSI WRITE command */
#define SG_DXFER_FROM_DEV (-3) /* e.g. a SCSI READ command */
#define SG_DXFER_TO_FROM_DEV (-4) /* treated like SG_DXFER_FROM_DEV with the
additional property than during indirect
IO the user buffer is copied into the
kernel buffers before the transfer */
#define SG_DXFER_UNKNOWN (-5) /* Unknown data direction */
 
/* following flag values can be "or"-ed together */
#define SG_FLAG_DIRECT_IO 1 /* default is indirect IO */
#define SG_FLAG_LUN_INHIBIT 2 /* default is overwrite lun in SCSI */
/* command block (when <= SCSI_2) */
#define SG_FLAG_MMAP_IO 4 /* request memory mapped IO */
#define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */
/* user space (debug indirect IO) */
 
/* following 'info' values are "or"-ed together */
#define SG_INFO_OK_MASK 0x1
#define SG_INFO_OK 0x0 /* no sense, host nor driver "noise" */
#define SG_INFO_CHECK 0x1 /* something abnormal happened */
 
#define SG_INFO_DIRECT_IO_MASK 0x6
#define SG_INFO_INDIRECT_IO 0x0 /* data xfer via kernel buffers (or no xfer) */
#define SG_INFO_DIRECT_IO 0x2 /* direct IO requested and performed */
#define SG_INFO_MIXED_IO 0x4 /* part direct, part indirect IO */
 
 
typedef struct sg_scsi_id { /* used by SG_GET_SCSI_ID ioctl() */
int host_no; /* as in "scsi<n>" where 'n' is one of 0, 1, 2 etc */
int channel;
int scsi_id; /* scsi id of target device */
int lun;
int scsi_type; /* TYPE_... defined in scsi/scsi.h */
short h_cmd_per_lun;/* host (adapter) maximum commands per lun */
short d_queue_depth;/* device (or adapter) maximum queue length */
int unused[2]; /* probably find a good use, set 0 for now */
} sg_scsi_id_t; /* 32 bytes long on i386 */
 
typedef struct sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */
char req_state; /* 0 -> not used, 1 -> written, 2 -> ready to read */
char orphan; /* 0 -> normal request, 1 -> from interruped SG_IO */
char sg_io_owned; /* 0 -> complete with read(), 1 -> owned by SG_IO */
char problem; /* 0 -> no problem detected, 1 -> error to report */
int pack_id; /* pack_id associated with request */
void * usr_ptr; /* user provided pointer (in new interface) */
unsigned int duration; /* millisecs elapsed since written (req_state==1)
or request duration (req_state==2) */
int unused;
} sg_req_info_t; /* 20 bytes long on i386 */
 
 
/* IOCTLs: Those ioctls that are relevant to the SG 3.x drivers follow.
[Those that only apply to the SG 2.x drivers are at the end of the file.]
(_GET_s yield result via 'int *' 3rd argument unless otherwise indicated) */
 
#define SG_EMULATED_HOST 0x2203 /* true for emulated host adapter (ATAPI) */
 
/* Used to configure SCSI command transformation layer for ATAPI devices */
/* Only supported by the ide-scsi driver */
#define SG_SET_TRANSFORM 0x2204 /* N.B. 3rd arg is not pointer but value: */
/* 3rd arg = 0 to disable transform, 1 to enable it */
#define SG_GET_TRANSFORM 0x2205
 
#define SG_SET_RESERVED_SIZE 0x2275 /* request a new reserved buffer size */
#define SG_GET_RESERVED_SIZE 0x2272 /* actual size of reserved buffer */
 
/* The following ioctl has a 'sg_scsi_id_t *' object as its 3rd argument. */
#define SG_GET_SCSI_ID 0x2276 /* Yields fd's bus, chan, dev, lun + type */
/* SCSI id information can also be obtained from SCSI_IOCTL_GET_IDLUN */
 
/* Override host setting and always DMA using low memory ( <16MB on i386) */
#define SG_SET_FORCE_LOW_DMA 0x2279 /* 0-> use adapter setting, 1-> force */
#define SG_GET_LOW_DMA 0x227a /* 0-> use all ram for dma; 1-> low dma ram */
 
/* When SG_SET_FORCE_PACK_ID set to 1, pack_id is input to read() which
tries to fetch a packet with a matching pack_id, waits, or returns EAGAIN.
If pack_id is -1 then read oldest waiting. When ...FORCE_PACK_ID set to 0
then pack_id ignored by read() and oldest readable fetched. */
#define SG_SET_FORCE_PACK_ID 0x227b
#define SG_GET_PACK_ID 0x227c /* Yields oldest readable pack_id (or -1) */
 
#define SG_GET_NUM_WAITING 0x227d /* Number of commands awaiting read() */
 
/* Yields max scatter gather tablesize allowed by current host adapter */
#define SG_GET_SG_TABLESIZE 0x227F /* 0 implies can't do scatter gather */
 
#define SG_GET_VERSION_NUM 0x2282 /* Example: version 2.1.34 yields 20134 */
 
/* Returns -EBUSY if occupied. 3rd argument pointer to int (see next) */
#define SG_SCSI_RESET 0x2284
/* Associated values that can be given to SG_SCSI_RESET follow */
#define SG_SCSI_RESET_NOTHING 0
#define SG_SCSI_RESET_DEVICE 1
#define SG_SCSI_RESET_BUS 2
#define SG_SCSI_RESET_HOST 3
 
/* synchronous SCSI command ioctl, (only in version 3 interface) */
#define SG_IO 0x2285 /* similar effect as write() followed by read() */
 
#define SG_GET_REQUEST_TABLE 0x2286 /* yields table of active requests */
 
/* How to treat EINTR during SG_IO ioctl(), only in SG 3.x series */
#define SG_SET_KEEP_ORPHAN 0x2287 /* 1 -> hold for read(), 0 -> drop (def) */
#define SG_GET_KEEP_ORPHAN 0x2288
 
/* yields scsi midlevel's access_count for this SCSI device */
#define SG_GET_ACCESS_COUNT 0x2289
 
 
#define SG_SCATTER_SZ (8 * 4096) /* PAGE_SIZE not available to user */
/* Largest size (in bytes) a single scatter-gather list element can have.
The value must be a power of 2 and <= (PAGE_SIZE * 32) [131072 bytes on
i386]. The minimum value is PAGE_SIZE. If scatter-gather not supported
by adapter then this value is the largest data block that can be
read/written by a single scsi command. The user can find the value of
PAGE_SIZE by calling getpagesize() defined in unistd.h . */
 
#define SG_DEFAULT_RETRIES 1
 
/* Defaults, commented if they differ from original sg driver */
#define SG_DEF_FORCE_LOW_DMA 0 /* was 1 -> memory below 16MB on i386 */
#define SG_DEF_FORCE_PACK_ID 0
#define SG_DEF_KEEP_ORPHAN 0
#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ /* load time option */
 
/* maximum outstanding requests, write() yields EDOM if exceeded */
#define SG_MAX_QUEUE 16
 
#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE /* for backward compatibility */
 
/* Alternate style type names, "..._t" variants preferred */
typedef struct sg_io_hdr Sg_io_hdr;
typedef struct sg_io_vec Sg_io_vec;
typedef struct sg_scsi_id Sg_scsi_id;
typedef struct sg_req_info Sg_req_info;
 
 
/* vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv */
/* The older SG interface based on the 'sg_header' structure follows. */
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ */
 
#define SG_MAX_SENSE 16 /* this only applies to the sg_header interface */
 
struct sg_header
{
int pack_len; /* [o] reply_len (ie useless), ignored as input */
int reply_len; /* [i] max length of expected reply (inc. sg_header) */
int pack_id; /* [io] id number of packet (use ints >= 0) */
int result; /* [o] 0==ok, else (+ve) Unix errno (best ignored) */
unsigned int twelve_byte:1;
/* [i] Force 12 byte command length for group 6 & 7 commands */
unsigned int target_status:5; /* [o] scsi status from target */
unsigned int host_status:8; /* [o] host status (see "DID" codes) */
unsigned int driver_status:8; /* [o] driver status+suggestion */
unsigned int other_flags:10; /* unused */
unsigned char sense_buffer[SG_MAX_SENSE]; /* [o] Output in 3 cases:
when target_status is CHECK_CONDITION or
when target_status is COMMAND_TERMINATED or
when (driver_status & DRIVER_SENSE) is true. */
}; /* This structure is 36 bytes long on i386 */
 
 
/* IOCTLs: The following are not required (or ignored) when the sg_io_hdr_t
interface is used. They are kept for backward compatibility with
the original and version 2 drivers. */
 
#define SG_SET_TIMEOUT 0x2201 /* unit: jiffies (10ms on i386) */
#define SG_GET_TIMEOUT 0x2202 /* yield timeout as _return_ value */
 
/* Get/set command queuing state per fd (default is SG_DEF_COMMAND_Q.
Each time a sg_io_hdr_t object is seen on this file descriptor, this
command queuing flag is set on (overriding the previous setting). */
#define SG_GET_COMMAND_Q 0x2270 /* Yields 0 (queuing off) or 1 (on) */
#define SG_SET_COMMAND_Q 0x2271 /* Change queuing state with 0 or 1 */
 
/* Turn on/off error sense trace (1 and 0 respectively, default is off).
Try using: "# cat /proc/scsi/sg/debug" instead in the v3 driver */
#define SG_SET_DEBUG 0x227e /* 0 -> turn off debug */
 
#define SG_NEXT_CMD_LEN 0x2283 /* override SCSI command length with given
number on the next write() on this file descriptor */
 
 
/* Defaults, commented if they differ from original sg driver */
#define SG_DEFAULT_TIMEOUT (60*HZ) /* HZ == 'jiffies in 1 second' */
#define SG_DEF_COMMAND_Q 0 /* command queuing is always on when
the new interface is used */
#define SG_DEF_UNDERRUN_FLAG 0
 
#endif
/scsi_ioctl.h
0,0 → 1,51
#ifndef _SCSI_IOCTL_H
#define _SCSI_IOCTL_H
 
#define SCSI_IOCTL_SEND_COMMAND 1
#define SCSI_IOCTL_TEST_UNIT_READY 2
#define SCSI_IOCTL_BENCHMARK_COMMAND 3
#define SCSI_IOCTL_SYNC 4 /* Request synchronous parameters */
#define SCSI_IOCTL_START_UNIT 5
#define SCSI_IOCTL_STOP_UNIT 6
/* The door lock/unlock constants are compatible with Sun constants for
the cdrom */
#define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */
#define SCSI_IOCTL_DOORUNLOCK 0x5381 /* unlock the mechanism */
 
#define SCSI_REMOVAL_PREVENT 1
#define SCSI_REMOVAL_ALLOW 0
 
#ifdef __KERNEL__
 
/*
* Structures used for scsi_ioctl et al.
*/
 
typedef struct scsi_ioctl_command {
unsigned int inlen;
unsigned int outlen;
unsigned char data[0];
} Scsi_Ioctl_Command;
 
typedef struct scsi_idlun {
__u32 dev_id;
__u32 host_unique_id;
} Scsi_Idlun;
 
/* Fibre Channel WWN, port_id struct */
typedef struct scsi_fctargaddress
{
__u32 host_port_id;
unsigned char host_wwn[8]; // include NULL term.
} Scsi_FCTargAddress;
 
extern int scsi_ioctl (Scsi_Device *dev, int cmd, void *arg);
extern int kernel_scsi_ioctl (Scsi_Device *dev, int cmd, void *arg);
extern int scsi_ioctl_send_command(Scsi_Device *dev,
Scsi_Ioctl_Command *arg);
 
#endif
 
#endif
 
 
/scsi.h
0,0 → 1,261
#ifndef _LINUX_SCSI_H
#define _LINUX_SCSI_H
 
/*
* This header file contains public constants and structures used by
* the scsi code for linux.
*/
 
/*
$Header: /home/marcus/revision_ctrl_test/oc_cvs/cvs/or1k/linux/linux-2.4/include/scsi/scsi.h,v 1.1.1.1 2004-04-15 02:34:58 phoenix Exp $
 
For documentation on the OPCODES, MESSAGES, and SENSE values,
please consult the SCSI standard.
 
*/
 
/*
* SCSI opcodes
*/
 
#define TEST_UNIT_READY 0x00
#define REZERO_UNIT 0x01
#define REQUEST_SENSE 0x03
#define FORMAT_UNIT 0x04
#define READ_BLOCK_LIMITS 0x05
#define REASSIGN_BLOCKS 0x07
#define READ_6 0x08
#define WRITE_6 0x0a
#define SEEK_6 0x0b
#define READ_REVERSE 0x0f
#define WRITE_FILEMARKS 0x10
#define SPACE 0x11
#define INQUIRY 0x12
#define RECOVER_BUFFERED_DATA 0x14
#define MODE_SELECT 0x15
#define RESERVE 0x16
#define RELEASE 0x17
#define COPY 0x18
#define ERASE 0x19
#define MODE_SENSE 0x1a
#define START_STOP 0x1b
#define RECEIVE_DIAGNOSTIC 0x1c
#define SEND_DIAGNOSTIC 0x1d
#define ALLOW_MEDIUM_REMOVAL 0x1e
 
#define SET_WINDOW 0x24
#define READ_CAPACITY 0x25
#define READ_10 0x28
#define WRITE_10 0x2a
#define SEEK_10 0x2b
#define WRITE_VERIFY 0x2e
#define VERIFY 0x2f
#define SEARCH_HIGH 0x30
#define SEARCH_EQUAL 0x31
#define SEARCH_LOW 0x32
#define SET_LIMITS 0x33
#define PRE_FETCH 0x34
#define READ_POSITION 0x34
#define SYNCHRONIZE_CACHE 0x35
#define LOCK_UNLOCK_CACHE 0x36
#define READ_DEFECT_DATA 0x37
#define MEDIUM_SCAN 0x38
#define COMPARE 0x39
#define COPY_VERIFY 0x3a
#define WRITE_BUFFER 0x3b
#define READ_BUFFER 0x3c
#define UPDATE_BLOCK 0x3d
#define READ_LONG 0x3e
#define WRITE_LONG 0x3f
#define CHANGE_DEFINITION 0x40
#define WRITE_SAME 0x41
#define READ_TOC 0x43
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
#define RELEASE_10 0x57
#define MODE_SENSE_10 0x5a
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define REPORT_LUNS 0xa0
#define MOVE_MEDIUM 0xa5
#define READ_12 0xa8
#define WRITE_12 0xaa
#define WRITE_VERIFY_12 0xae
#define SEARCH_HIGH_12 0xb0
#define SEARCH_EQUAL_12 0xb1
#define SEARCH_LOW_12 0xb2
#define READ_ELEMENT_STATUS 0xb8
#define SEND_VOLUME_TAG 0xb6
#define WRITE_LONG_2 0xea
#define READ_16 0x88
#define WRITE_16 0x8a
#define SERVICE_ACTION_IN 0x9e
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
 
#define SCSI_RETRY_10(c) ((c) == READ_6 || (c) == WRITE_6 || (c) == SEEK_6)
 
/*
* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
* T10/1561-D Revision 4 Draft dated 7th November 2002.
*/
#define SAM_STAT_GOOD 0x00
#define SAM_STAT_CHECK_CONDITION 0x02
#define SAM_STAT_CONDITION_MET 0x04
#define SAM_STAT_BUSY 0x08
#define SAM_STAT_INTERMEDIATE 0x10
#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
#define SAM_STAT_RESERVATION_CONFLICT 0x18
#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
#define SAM_STAT_TASK_SET_FULL 0x28
#define SAM_STAT_ACA_ACTIVE 0x30
#define SAM_STAT_TASK_ABORTED 0x40
 
/*
* Status codes
*/
 
#define GOOD 0x00
#define CHECK_CONDITION 0x01
#define CONDITION_GOOD 0x02
#define BUSY 0x04
#define INTERMEDIATE_GOOD 0x08
#define INTERMEDIATE_C_GOOD 0x0a
#define RESERVATION_CONFLICT 0x0c
#define COMMAND_TERMINATED 0x11
#define QUEUE_FULL 0x14
 
#define STATUS_MASK 0x3e
 
/*
* SENSE KEYS
*/
 
#define NO_SENSE 0x00
#define RECOVERED_ERROR 0x01
#define NOT_READY 0x02
#define MEDIUM_ERROR 0x03
#define HARDWARE_ERROR 0x04
#define ILLEGAL_REQUEST 0x05
#define UNIT_ATTENTION 0x06
#define DATA_PROTECT 0x07
#define BLANK_CHECK 0x08
#define COPY_ABORTED 0x0a
#define ABORTED_COMMAND 0x0b
#define VOLUME_OVERFLOW 0x0d
#define MISCOMPARE 0x0e
 
 
/*
* DEVICE TYPES
*/
 
#define TYPE_DISK 0x00
#define TYPE_TAPE 0x01
#define TYPE_PRINTER 0x02
#define TYPE_PROCESSOR 0x03 /* HP scanners use this */
#define TYPE_WORM 0x04 /* Treated as ROM by our system */
#define TYPE_ROM 0x05
#define TYPE_SCANNER 0x06
#define TYPE_MOD 0x07 /* Magneto-optical disk -
* - treated as TYPE_DISK */
#define TYPE_MEDIUM_CHANGER 0x08
#define TYPE_COMM 0x09 /* Communications device */
#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
#define TYPE_NO_LUN 0x7f
 
/*
* standard mode-select header prepended to all mode-select commands
*
* moved here from cdrom.h -- kraxel
*/
 
struct ccs_modesel_head
{
u_char _r1; /* reserved */
u_char medium; /* device-specific medium type */
u_char _r2; /* reserved */
u_char block_desc_length; /* block descriptor length */
u_char density; /* device-specific density code */
u_char number_blocks_hi; /* number of blocks in this block desc */
u_char number_blocks_med;
u_char number_blocks_lo;
u_char _r3;
u_char block_length_hi; /* block length for blocks in this desc */
u_char block_length_med;
u_char block_length_lo;
};
 
/*
* MESSAGE CODES
*/
 
#define COMMAND_COMPLETE 0x00
#define EXTENDED_MESSAGE 0x01
#define EXTENDED_MODIFY_DATA_POINTER 0x00
#define EXTENDED_SDTR 0x01
#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
#define EXTENDED_WDTR 0x03
#define SAVE_POINTERS 0x02
#define RESTORE_POINTERS 0x03
#define DISCONNECT 0x04
#define INITIATOR_ERROR 0x05
#define ABORT 0x06
#define MESSAGE_REJECT 0x07
#define NOP 0x08
#define MSG_PARITY_ERROR 0x09
#define LINKED_CMD_COMPLETE 0x0a
#define LINKED_FLG_CMD_COMPLETE 0x0b
#define BUS_DEVICE_RESET 0x0c
 
#define INITIATE_RECOVERY 0x0f /* SCSI-II only */
#define RELEASE_RECOVERY 0x10 /* SCSI-II only */
 
#define SIMPLE_QUEUE_TAG 0x20
#define HEAD_OF_QUEUE_TAG 0x21
#define ORDERED_QUEUE_TAG 0x22
 
/*
* Here are some scsi specific ioctl commands which are sometimes useful.
*/
/* These are a few other constants only used by scsi devices */
/* Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 */
 
#define SCSI_IOCTL_GET_IDLUN 0x5382 /* conflicts with CDROMAUDIOBUFSIZ */
 
/* Used to turn on and off tagged queuing for scsi devices */
 
#define SCSI_IOCTL_TAGGED_ENABLE 0x5383
#define SCSI_IOCTL_TAGGED_DISABLE 0x5384
 
/* Used to obtain the host number of a device. */
#define SCSI_IOCTL_PROBE_HOST 0x5385
 
/* Used to get the bus number for a device */
#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
 
/* Used to get the PCI location of a device */
#define SCSI_IOCTL_GET_PCI 0x5387
 
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-indent-level: 4
* c-brace-imaginary-offset: 0
* c-brace-offset: -4
* c-argdecl-indent: 4
* c-label-offset: -4
* c-continued-statement-offset: 4
* c-continued-brace-offset: 0
* indent-tabs-mode: nil
* tab-width: 8
* End:
*/
 
#endif
/scsicam.h
0,0 → 1,19
/*
* scsicam.h - SCSI CAM support functions, use for HDIO_GETGEO, etc.
*
* Copyright 1993, 1994 Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@Colorado.EDU
* +1 (303) 786-7975
*
* For more information, please consult the SCSI-CAM draft.
*/
 
#ifndef SCSICAM_H
#define SCSICAM_H
#include <linux/kdev_t.h>
extern int scsicam_bios_param (Disk *disk, kdev_t dev, int *ip);
extern int scsi_partsize(struct buffer_head *bh, unsigned long capacity,
unsigned int *cyls, unsigned int *hds, unsigned int *secs);
#endif /* def SCSICAM_H */

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