mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
3d45cefc8e
Originally the SCSI subsystem has been using 'special' SCSI status codes, which were the SAM-specified ones but shifted by 1. As most drivers have now been modified to use the SAM-specified ones, having two nearly identical sets of definitions only causes confusion. The Linux-specifed SCSI status codes have been marked obsolete for several years so drop them and use the SAM-specified status codes throughout. Link: https://lore.kernel.org/r/20210427083046.31620-41-hare@suse.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
338 lines
15 KiB
C
338 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _SCSI_GENERIC_H
|
|
#define _SCSI_GENERIC_H
|
|
|
|
#include <linux/compiler.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 - 2014 Douglas Gilbert
|
|
*
|
|
* Version: 3.5.36 (20140603)
|
|
* This version is for 2.6 and 3 series kernels.
|
|
*
|
|
* Documentation
|
|
* =============
|
|
* A web site for the SG device driver can be found at:
|
|
* http://sg.danny.cz/sg [alternatively check the MAINTAINERS file]
|
|
* The documentation for the sg version 3 driver can be found at:
|
|
* http://sg.danny.cz/sg/p/sg_v3_ho.html
|
|
* Also see: <kernel_source>/Documentation/scsi/scsi-generic.rst
|
|
*
|
|
* For utility and test programs see: http://sg.danny.cz/sg/sg3_utils.html
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
extern int sg_big_buff; /* for sysctl */
|
|
#endif
|
|
|
|
|
|
typedef struct sg_iovec /* same structure as used by readv() Linux system */
|
|
{ /* call. It defines one scatter-gather element. */
|
|
void __user *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 */
|
|
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 __user *dxferp; /* [i], [*io] points to data transfer memory
|
|
or scatter gather list */
|
|
unsigned char __user *cmdp; /* [i], [*i] points to command to perform */
|
|
void __user *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 __user * 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) */
|
|
|
|
#if defined(__KERNEL__)
|
|
#include <linux/compat.h>
|
|
|
|
struct compat_sg_io_hdr {
|
|
compat_int_t interface_id; /* [i] 'S' for SCSI generic (required) */
|
|
compat_int_t 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 */
|
|
compat_uint_t dxfer_len; /* [i] byte count of data transfer */
|
|
compat_uint_t dxferp; /* [i], [*io] points to data transfer memory
|
|
or scatter gather list */
|
|
compat_uptr_t cmdp; /* [i], [*i] points to command to perform */
|
|
compat_uptr_t sbp; /* [i], [*o] points to sense_buffer memory */
|
|
compat_uint_t timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */
|
|
compat_uint_t flags; /* [i] 0 -> default, see SG_FLAG... */
|
|
compat_int_t pack_id; /* [i->o] unused internally (normally) */
|
|
compat_uptr_t 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 */
|
|
compat_int_t resid; /* [o] dxfer_len - actual_transferred */
|
|
compat_uint_t duration; /* [o] time taken by cmd (unit: millisec) */
|
|
compat_uint_t info; /* [o] auxiliary information */
|
|
};
|
|
#endif
|
|
|
|
#define SG_INTERFACE_ID_ORIG 'S'
|
|
|
|
/* 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_UNUSED_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) */
|
|
/* defaults:: for sg driver: Q_AT_HEAD; for block layer: Q_AT_TAIL */
|
|
#define SG_FLAG_Q_AT_TAIL 0x10
|
|
#define SG_FLAG_Q_AT_HEAD 0x20
|
|
|
|
/* 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 */
|
|
|
|
/*
|
|
* Obsolete DRIVER_SENSE driver byte
|
|
*
|
|
* Originally the SCSI midlayer would set the DRIVER_SENSE driver byte when
|
|
* a sense code was generated and a sense buffer was allocated.
|
|
* However, as nowadays every scsi command has a sense code allocated this
|
|
* distinction became moot as one could check the sense buffer directly.
|
|
* Consequently this byte is not set anymore from the midlayer, but SG will
|
|
* keep setting this byte to be compatible with previous releases.
|
|
*/
|
|
#define DRIVER_SENSE 0x08
|
|
/* Obsolete driver_byte() declaration */
|
|
#define driver_byte(result) (((result) >> 24) & 0xff)
|
|
|
|
/*
|
|
* Original linux SCSI Status codes. They are shifted 1 bit right
|
|
* from those found in the SCSI standards.
|
|
*/
|
|
|
|
#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 ACA_ACTIVE 0x18
|
|
#define TASK_ABORTED 0x20
|
|
|
|
/* Obsolete status_byte() declaration */
|
|
#define status_byte(result) (((result) >> 1) & 0x7f)
|
|
|
|
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 interrupted 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 __user *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.
|
|
* SG_SCSI_RESET_NO_ESCALATE may be OR-ed to the _DEVICE, _TARGET, _BUS
|
|
* or _HOST reset value so only that action is attempted. */
|
|
#define SG_SCSI_RESET_NOTHING 0
|
|
#define SG_SCSI_RESET_DEVICE 1
|
|
#define SG_SCSI_RESET_BUS 2
|
|
#define SG_SCSI_RESET_HOST 3
|
|
#define SG_SCSI_RESET_TARGET 4
|
|
#define SG_SCSI_RESET_NO_ESCALATE 0x100
|
|
|
|
/* 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)
|
|
/* Largest size (in bytes) a single scatter-gather list element can have.
|
|
The value used by the driver is 'max(SG_SCATTER_SZ, PAGE_SIZE)'.
|
|
This value should be a power of 2 (and may be rounded up internally).
|
|
If scatter-gather is not supported by adapter then this value is the
|
|
largest data block that can be read/written by a single scsi command. */
|
|
|
|
#define SG_DEFAULT_RETRIES 0
|
|
|
|
/* Defaults, commented if they differ from original sg driver */
|
|
#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 */
|
|
#ifdef __KERNEL__
|
|
#define SG_DEFAULT_TIMEOUT_USER (60*USER_HZ) /* HZ == 'jiffies in 1 second' */
|
|
#else
|
|
#define SG_DEFAULT_TIMEOUT (60*HZ) /* HZ == 'jiffies in 1 second' */
|
|
#endif
|
|
|
|
#define SG_DEF_COMMAND_Q 0 /* command queuing is always on when
|
|
the new interface is used */
|
|
#define SG_DEF_UNDERRUN_FLAG 0
|
|
|
|
#endif
|