224 lines
5.9 KiB
C
224 lines
5.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* This header file contains public constants and structures used by
|
|
* the SCSI initiator code.
|
|
*/
|
|
#ifndef _SCSI_SCSI_H
|
|
#define _SCSI_SCSI_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/kernel.h>
|
|
#include <scsi/scsi_common.h>
|
|
#include <scsi/scsi_proto.h>
|
|
#include <scsi/scsi_status.h>
|
|
|
|
struct scsi_cmnd;
|
|
|
|
enum scsi_timeouts {
|
|
SCSI_DEFAULT_EH_TIMEOUT = 10 * HZ,
|
|
};
|
|
|
|
/*
|
|
* DIX-capable adapters effectively support infinite chaining for the
|
|
* protection information scatterlist
|
|
*/
|
|
#define SCSI_MAX_PROT_SG_SEGMENTS 0xFFFF
|
|
|
|
/*
|
|
* Special value for scanning to specify scanning or rescanning of all
|
|
* possible channels, (target) ids, or luns on a given shost.
|
|
*/
|
|
#define SCAN_WILD_CARD ~0
|
|
|
|
/*
|
|
* standard mode-select header prepended to all mode-select commands
|
|
*/
|
|
|
|
struct ccs_modesel_head {
|
|
__u8 _r1; /* reserved */
|
|
__u8 medium; /* device-specific medium type */
|
|
__u8 _r2; /* reserved */
|
|
__u8 block_desc_length; /* block descriptor length */
|
|
__u8 density; /* device-specific density code */
|
|
__u8 number_blocks_hi; /* number of blocks in this block desc */
|
|
__u8 number_blocks_med;
|
|
__u8 number_blocks_lo;
|
|
__u8 _r3;
|
|
__u8 block_length_hi; /* block length for blocks in this desc */
|
|
__u8 block_length_med;
|
|
__u8 block_length_lo;
|
|
};
|
|
|
|
/*
|
|
* The Well Known LUNS (SAM-3) in our int representation of a LUN
|
|
*/
|
|
#define SCSI_W_LUN_BASE 0xc100
|
|
#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
|
|
#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
|
|
#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
|
|
|
|
static inline int scsi_is_wlun(u64 lun)
|
|
{
|
|
return (lun & 0xff00) == SCSI_W_LUN_BASE;
|
|
}
|
|
|
|
/**
|
|
* scsi_status_is_check_condition - check the status return.
|
|
*
|
|
* @status: the status passed up from the driver (including host and
|
|
* driver components)
|
|
*
|
|
* This returns true if the status code is SAM_STAT_CHECK_CONDITION.
|
|
*/
|
|
static inline int scsi_status_is_check_condition(int status)
|
|
{
|
|
if (status < 0)
|
|
return false;
|
|
status &= 0xfe;
|
|
return status == SAM_STAT_CHECK_CONDITION;
|
|
}
|
|
|
|
/*
|
|
* Extended message codes.
|
|
*/
|
|
#define EXTENDED_MODIFY_DATA_POINTER 0x00
|
|
#define EXTENDED_SDTR 0x01
|
|
#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
|
|
#define EXTENDED_WDTR 0x03
|
|
#define EXTENDED_PPR 0x04
|
|
#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
|
|
|
|
/*
|
|
* Internal return values.
|
|
*/
|
|
enum scsi_disposition {
|
|
NEEDS_RETRY = 0x2001,
|
|
SUCCESS = 0x2002,
|
|
FAILED = 0x2003,
|
|
QUEUED = 0x2004,
|
|
SOFT_ERROR = 0x2005,
|
|
ADD_TO_MLQUEUE = 0x2006,
|
|
TIMEOUT_ERROR = 0x2007,
|
|
SCSI_RETURN_NOT_HANDLED = 0x2008,
|
|
FAST_IO_FAIL = 0x2009,
|
|
};
|
|
|
|
/*
|
|
* Midlevel queue return values.
|
|
*/
|
|
#define SCSI_MLQUEUE_HOST_BUSY 0x1055
|
|
#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
|
|
#define SCSI_MLQUEUE_EH_RETRY 0x1057
|
|
#define SCSI_MLQUEUE_TARGET_BUSY 0x1058
|
|
|
|
/*
|
|
* Use these to separate status msg and our bytes
|
|
*
|
|
* These are set by:
|
|
*
|
|
* status byte = set from target device
|
|
* msg_byte (unused)
|
|
* host_byte = set by low-level driver to indicate status.
|
|
*/
|
|
#define status_byte(result) (result & 0xff)
|
|
#define host_byte(result) (((result) >> 16) & 0xff)
|
|
|
|
#define sense_class(sense) (((sense) >> 4) & 0x7)
|
|
#define sense_error(sense) ((sense) & 0xf)
|
|
#define sense_valid(sense) ((sense) & 0x80)
|
|
|
|
/*
|
|
* default timeouts
|
|
*/
|
|
#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
|
|
#define START_STOP_TIMEOUT (60 * HZ)
|
|
#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
|
|
#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
|
|
#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
|
|
|
|
|
|
#define IDENTIFY_BASE 0x80
|
|
#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
|
|
((can_disconnect) ? 0x40 : 0) |\
|
|
((lun) & 0x07))
|
|
|
|
/*
|
|
* struct scsi_device::scsi_level values. For SCSI devices other than those
|
|
* prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
|
|
* where "resp" is a byte array of the response to an INQUIRY. The scsi_level
|
|
* variable is visible to the user via sysfs.
|
|
*/
|
|
|
|
#define SCSI_UNKNOWN 0
|
|
#define SCSI_1 1
|
|
#define SCSI_1_CCS 2
|
|
#define SCSI_2 3
|
|
#define SCSI_3 4 /* SPC */
|
|
#define SCSI_SPC_2 5
|
|
#define SCSI_SPC_3 6
|
|
#define SCSI_SPC_4 7
|
|
#define SCSI_SPC_5 8
|
|
#define SCSI_SPC_6 14
|
|
|
|
/*
|
|
* INQ PERIPHERAL QUALIFIERS
|
|
*/
|
|
#define SCSI_INQ_PQ_CON 0x00
|
|
#define SCSI_INQ_PQ_NOT_CON 0x01
|
|
#define SCSI_INQ_PQ_NOT_CAP 0x03
|
|
|
|
|
|
/*
|
|
* Here are some scsi specific ioctl commands which are sometimes useful.
|
|
*
|
|
* Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
|
|
*/
|
|
|
|
/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
|
|
#define SCSI_IOCTL_GET_IDLUN 0x5382
|
|
|
|
/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
|
|
|
|
/* Used to obtain the host number of a device. */
|
|
#define SCSI_IOCTL_PROBE_HOST 0x5385
|
|
|
|
/* Used to obtain the bus number for a device */
|
|
#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
|
|
|
|
/* Used to obtain the PCI location of a device */
|
|
#define SCSI_IOCTL_GET_PCI 0x5387
|
|
|
|
/** scsi_status_is_good - check the status return.
|
|
*
|
|
* @status: the status passed up from the driver (including host and
|
|
* driver components)
|
|
*
|
|
* This returns true for known good conditions that may be treated as
|
|
* command completed normally
|
|
*/
|
|
static inline bool scsi_status_is_good(int status)
|
|
{
|
|
if (status < 0)
|
|
return false;
|
|
|
|
if (host_byte(status) == DID_NO_CONNECT)
|
|
return false;
|
|
|
|
/*
|
|
* FIXME: bit0 is listed as reserved in SCSI-2, but is
|
|
* significant in SCSI-3. For now, we follow the SCSI-2
|
|
* behaviour and ignore reserved bits.
|
|
*/
|
|
status &= 0xfe;
|
|
return ((status == SAM_STAT_GOOD) ||
|
|
(status == SAM_STAT_CONDITION_MET) ||
|
|
/* Next two "intermediate" statuses are obsolete in SAM-4 */
|
|
(status == SAM_STAT_INTERMEDIATE) ||
|
|
(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
|
|
/* FIXME: this is obsolete in SAM-3 */
|
|
(status == SAM_STAT_COMMAND_TERMINATED));
|
|
}
|
|
|
|
#endif /* _SCSI_SCSI_H */
|