313 lines
7.9 KiB
C
313 lines
7.9 KiB
C
/* 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 {
|
|
SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */
|
|
SD_ZERO_WS, /* Use WRITE SAME(10/16) command */
|
|
SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */
|
|
SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */
|
|
};
|
|
|
|
struct scsi_disk {
|
|
struct scsi_driver *driver; /* always &sd_template */
|
|
struct scsi_device *device;
|
|
struct device dev;
|
|
struct gendisk *disk;
|
|
struct opal_dev *opal_dev;
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
u32 nr_zones;
|
|
u32 zone_blocks;
|
|
u32 zone_shift;
|
|
u32 zones_optimal_open;
|
|
u32 zones_optimal_nonseq;
|
|
u32 zones_max_open;
|
|
#endif
|
|
atomic_t openers;
|
|
sector_t capacity; /* size in logical blocks */
|
|
u32 max_xfer_blocks;
|
|
u32 opt_xfer_blocks;
|
|
u32 max_ws_blocks;
|
|
u32 max_unmap_blocks;
|
|
u32 unmap_granularity;
|
|
u32 unmap_alignment;
|
|
u32 index;
|
|
unsigned int physical_block_size;
|
|
unsigned int max_medium_access_timeouts;
|
|
unsigned int medium_access_timed_out;
|
|
u8 media_present;
|
|
u8 write_prot;
|
|
u8 protection_type;/* Data Integrity Field */
|
|
u8 provisioning_mode;
|
|
u8 zeroing_mode;
|
|
unsigned ATO : 1; /* state of disk ATO bit */
|
|
unsigned cache_override : 1; /* temp override of WCE,RCD */
|
|
unsigned WCE : 1; /* state of disk WCE bit */
|
|
unsigned RCD : 1; /* state of disk RCD bit, unused */
|
|
unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
|
|
unsigned first_scan : 1;
|
|
unsigned lbpme : 1;
|
|
unsigned lbprz : 1;
|
|
unsigned lbpu : 1;
|
|
unsigned lbpws : 1;
|
|
unsigned lbpws10 : 1;
|
|
unsigned lbpvpd : 1;
|
|
unsigned ws10 : 1;
|
|
unsigned ws16 : 1;
|
|
unsigned rc_basis: 2;
|
|
unsigned zoned: 2;
|
|
unsigned urswrz : 1;
|
|
unsigned security : 1;
|
|
unsigned ignore_medium_access_errors : 1;
|
|
|
|
ANDROID_KABI_RESERVE(1);
|
|
ANDROID_KABI_RESERVE(2);
|
|
};
|
|
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
|
|
|
|
static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
|
|
{
|
|
return container_of(disk->private_data, struct scsi_disk, driver);
|
|
}
|
|
|
|
#define sd_printk(prefix, sdsk, fmt, a...) \
|
|
(sdsk)->disk ? \
|
|
sdev_prefix_printk(prefix, (sdsk)->device, \
|
|
(sdsk)->disk->disk_name, fmt, ##a) : \
|
|
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
|
|
|
|
#define sd_first_printk(prefix, sdsk, fmt, a...) \
|
|
do { \
|
|
if ((sdkp)->first_scan) \
|
|
sd_printk(prefix, sdsk, fmt, ##a); \
|
|
} while (0)
|
|
|
|
static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
|
|
{
|
|
switch (scmd->cmnd[0]) {
|
|
case READ_6:
|
|
case READ_10:
|
|
case READ_12:
|
|
case READ_16:
|
|
case SYNCHRONIZE_CACHE:
|
|
case VERIFY:
|
|
case VERIFY_12:
|
|
case VERIFY_16:
|
|
case WRITE_6:
|
|
case WRITE_10:
|
|
case WRITE_12:
|
|
case WRITE_16:
|
|
case WRITE_SAME:
|
|
case WRITE_SAME_16:
|
|
case UNMAP:
|
|
return 1;
|
|
case VARIABLE_LENGTH_CMD:
|
|
switch (scmd->cmnd[9]) {
|
|
case READ_32:
|
|
case VERIFY_32:
|
|
case WRITE_32:
|
|
case WRITE_SAME_32:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
|
|
{
|
|
return blocks << (ilog2(sdev->sector_size) - 9);
|
|
}
|
|
|
|
static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
|
|
{
|
|
return blocks * sdev->sector_size;
|
|
}
|
|
|
|
static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
|
|
{
|
|
return bytes >> ilog2(sdev->sector_size);
|
|
}
|
|
|
|
static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
|
|
{
|
|
return sector >> (ilog2(sdev->sector_size) - 9);
|
|
}
|
|
|
|
/*
|
|
* Look up the DIX operation based on whether the command is read or
|
|
* write and whether dix and dif are enabled.
|
|
*/
|
|
static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
|
|
{
|
|
/* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
|
|
const unsigned int ops[] = { /* wrt dix dif */
|
|
SCSI_PROT_NORMAL, /* 0 0 0 */
|
|
SCSI_PROT_READ_STRIP, /* 0 0 1 */
|
|
SCSI_PROT_READ_INSERT, /* 0 1 0 */
|
|
SCSI_PROT_READ_PASS, /* 0 1 1 */
|
|
SCSI_PROT_NORMAL, /* 1 0 0 */
|
|
SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
|
|
SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
|
|
SCSI_PROT_WRITE_PASS, /* 1 1 1 */
|
|
};
|
|
|
|
return ops[write << 2 | dix << 1 | dif];
|
|
}
|
|
|
|
/*
|
|
* Returns a mask of the protection flags that are valid for a given DIX
|
|
* operation.
|
|
*/
|
|
static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
|
|
{
|
|
const unsigned int flag_mask[] = {
|
|
[SCSI_PROT_NORMAL] = 0,
|
|
|
|
[SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT,
|
|
|
|
[SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_REF_INCREMENT,
|
|
|
|
[SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
|
|
[SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
|
|
SCSI_PROT_GUARD_CHECK |
|
|
SCSI_PROT_REF_CHECK |
|
|
SCSI_PROT_REF_INCREMENT |
|
|
SCSI_PROT_IP_CHECKSUM,
|
|
};
|
|
|
|
return flag_mask[prot_op];
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INTEGRITY
|
|
|
|
extern void sd_dif_config_host(struct scsi_disk *);
|
|
|
|
#else /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
static inline void sd_dif_config_host(struct scsi_disk *disk)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
static inline int sd_is_zoned(struct scsi_disk *sdkp)
|
|
{
|
|
return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
|
|
extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
|
|
extern void sd_zbc_remove(struct scsi_disk *sdkp);
|
|
extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
|
|
extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd);
|
|
extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd);
|
|
extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
|
|
struct scsi_sense_hdr *sshdr);
|
|
|
|
#else /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
|
|
unsigned char *buf)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sd_zbc_remove(struct scsi_disk *sdkp) {}
|
|
|
|
static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {}
|
|
|
|
static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
return BLKPREP_INVALID;
|
|
}
|
|
|
|
static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd)
|
|
{
|
|
return BLKPREP_INVALID;
|
|
}
|
|
|
|
static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
|
|
unsigned int good_bytes,
|
|
struct scsi_sense_hdr *sshdr) {}
|
|
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
#endif /* _SCSI_DISK_H */
|