linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _SCSI_DISK_H

#define _SCSI_DISK_H

​

/*

 * More than enough for everybody ;)  The huge number of majors

 * is a leftover from 16bit dev_t days, we don't really need that

 * much numberspace.

 */

#define SD_MAJORS   16

​

/*

 * Time out in seconds for disks and Magneto-opticals (which are slower).

 */

#define SD_TIMEOUT      (30 * HZ)

#define SD_MOD_TIMEOUT      (75 * HZ)

/*

 * Flush timeout is a multiplier over the standard device timeout which is

 * user modifiable via sysfs but initially set to SD_TIMEOUT

 */

#define SD_FLUSH_TIMEOUT_MULTIPLIER 2

#define SD_WRITE_SAME_TIMEOUT   (120 * HZ)

​

/*

 * Number of allowed retries

 */

#define SD_MAX_RETRIES      5

#define SD_PASSTHROUGH_RETRIES  1

#define SD_MAX_MEDIUM_TIMEOUTS  2

​

/*

 * Size of the initial data buffer for mode and read capacity data

 */

#define SD_BUF_SIZE     512

​

/*

 * Number of sectors at the end of the device to avoid multi-sector

 * accesses to in the case of last_sector_bug

 */

#define SD_LAST_BUGGY_SECTORS   8

​

enum {

    SD_EXT_CDB_SIZE = 32,   /* Extended CDB size */

    SD_MEMPOOL_SIZE = 2,    /* CDB pool size */

};

​

enum {

    SD_DEF_XFER_BLOCKS = 0xffff,

    SD_MAX_XFER_BLOCKS = 0xffffffff,

    SD_MAX_WS10_BLOCKS = 0xffff,

    SD_MAX_WS16_BLOCKS = 0x7fffff,

};

​

enum {

    SD_LBP_FULL = 0,    /* Full logical block provisioning */

    SD_LBP_UNMAP,       /* Use UNMAP command */

    SD_LBP_WS16,        /* Use WRITE SAME(16) with UNMAP bit */

    SD_LBP_WS10,        /* Use WRITE SAME(10) with UNMAP bit */

    SD_LBP_ZERO,        /* Use WRITE SAME(10) with zero payload */

    SD_LBP_DISABLE,     /* Discard disabled due to failed cmd */

};

​

enum {