5 * More than enough for everybody ;) The huge number of majors
6 * is a leftover from 16bit dev_t days, we don't really need that
12 * Time out in seconds for disks and Magneto-opticals (which are slower).
14 #define SD_TIMEOUT (30 * HZ)
15 #define SD_MOD_TIMEOUT (75 * HZ)
17 * Flush timeout is a multiplier over the standard device timeout which is
18 * user modifiable via sysfs but initially set to SD_TIMEOUT
20 #define SD_FLUSH_TIMEOUT_MULTIPLIER 2
21 #define SD_WRITE_SAME_TIMEOUT (120 * HZ)
24 * Number of allowed retries
26 #define SD_MAX_RETRIES 5
27 #define SD_PASSTHROUGH_RETRIES 1
28 #define SD_MAX_MEDIUM_TIMEOUTS 2
31 * Size of the initial data buffer for mode and read capacity data
33 #define SD_BUF_SIZE 512
36 * Number of sectors at the end of the device to avoid multi-sector
37 * accesses to in the case of last_sector_bug
39 #define SD_LAST_BUGGY_SECTORS 8
42 SD_EXT_CDB_SIZE
= 32, /* Extended CDB size */
43 SD_MEMPOOL_SIZE
= 2, /* CDB pool size */
47 SD_DEF_XFER_BLOCKS
= 0xffff,
48 SD_MAX_XFER_BLOCKS
= 0xffffffff,
49 SD_MAX_WS10_BLOCKS
= 0xffff,
50 SD_MAX_WS16_BLOCKS
= 0x7fffff,
54 SD_LBP_FULL
= 0, /* Full logical block provisioning */
55 SD_LBP_UNMAP
, /* Use UNMAP command */
56 SD_LBP_WS16
, /* Use WRITE SAME(16) with UNMAP bit */
57 SD_LBP_WS10
, /* Use WRITE SAME(10) with UNMAP bit */
58 SD_LBP_ZERO
, /* Use WRITE SAME(10) with zero payload */
59 SD_LBP_DISABLE
, /* Discard disabled due to failed cmd */
63 struct scsi_driver
*driver
; /* always &sd_template */
64 struct scsi_device
*device
;
67 #ifdef CONFIG_BLK_DEV_ZONED
68 unsigned int nr_zones
;
69 unsigned int zone_blocks
;
70 unsigned int zone_shift
;
71 unsigned long *zones_wlock
;
72 unsigned int zones_optimal_open
;
73 unsigned int zones_optimal_nonseq
;
74 unsigned int zones_max_open
;
77 sector_t capacity
; /* size in logical blocks */
82 u32 unmap_granularity
;
85 unsigned int physical_block_size
;
86 unsigned int max_medium_access_timeouts
;
87 unsigned int medium_access_timed_out
;
90 u8 protection_type
;/* Data Integrity Field */
92 unsigned ATO
: 1; /* state of disk ATO bit */
93 unsigned cache_override
: 1; /* temp override of WCE,RCD */
94 unsigned WCE
: 1; /* state of disk WCE bit */
95 unsigned RCD
: 1; /* state of disk RCD bit, unused */
96 unsigned DPOFUA
: 1; /* state of disk DPOFUA bit */
97 unsigned first_scan
: 1;
102 unsigned lbpws10
: 1;
106 unsigned rc_basis
: 2;
110 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
112 static inline struct scsi_disk
*scsi_disk(struct gendisk
*disk
)
114 return container_of(disk
->private_data
, struct scsi_disk
, driver
);
117 #define sd_printk(prefix, sdsk, fmt, a...) \
119 sdev_prefix_printk(prefix, (sdsk)->device, \
120 (sdsk)->disk->disk_name, fmt, ##a) : \
121 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
123 #define sd_first_printk(prefix, sdsk, fmt, a...) \
125 if ((sdkp)->first_scan) \
126 sd_printk(prefix, sdsk, fmt, ##a); \
129 static inline int scsi_medium_access_command(struct scsi_cmnd
*scmd
)
131 switch (scmd
->cmnd
[0]) {
136 case SYNCHRONIZE_CACHE
:
148 case VARIABLE_LENGTH_CMD
:
149 switch (scmd
->cmnd
[9]) {
161 static inline sector_t
logical_to_sectors(struct scsi_device
*sdev
, sector_t blocks
)
163 return blocks
<< (ilog2(sdev
->sector_size
) - 9);
166 static inline unsigned int logical_to_bytes(struct scsi_device
*sdev
, sector_t blocks
)
168 return blocks
* sdev
->sector_size
;
171 static inline sector_t
sectors_to_logical(struct scsi_device
*sdev
, sector_t sector
)
173 return sector
>> (ilog2(sdev
->sector_size
) - 9);
177 * Look up the DIX operation based on whether the command is read or
178 * write and whether dix and dif are enabled.
180 static inline unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
182 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
183 const unsigned int ops
[] = { /* wrt dix dif */
184 SCSI_PROT_NORMAL
, /* 0 0 0 */
185 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
186 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
187 SCSI_PROT_READ_PASS
, /* 0 1 1 */
188 SCSI_PROT_NORMAL
, /* 1 0 0 */
189 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
190 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
191 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
194 return ops
[write
<< 2 | dix
<< 1 | dif
];
198 * Returns a mask of the protection flags that are valid for a given DIX
201 static inline unsigned int sd_prot_flag_mask(unsigned int prot_op
)
203 const unsigned int flag_mask
[] = {
204 [SCSI_PROT_NORMAL
] = 0,
206 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
207 SCSI_PROT_GUARD_CHECK
|
208 SCSI_PROT_REF_CHECK
|
209 SCSI_PROT_REF_INCREMENT
,
211 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
212 SCSI_PROT_IP_CHECKSUM
,
214 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
215 SCSI_PROT_GUARD_CHECK
|
216 SCSI_PROT_REF_CHECK
|
217 SCSI_PROT_REF_INCREMENT
|
218 SCSI_PROT_IP_CHECKSUM
,
220 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
221 SCSI_PROT_REF_INCREMENT
,
223 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
224 SCSI_PROT_REF_CHECK
|
225 SCSI_PROT_REF_INCREMENT
|
226 SCSI_PROT_IP_CHECKSUM
,
228 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
229 SCSI_PROT_GUARD_CHECK
|
230 SCSI_PROT_REF_CHECK
|
231 SCSI_PROT_REF_INCREMENT
|
232 SCSI_PROT_IP_CHECKSUM
,
235 return flag_mask
[prot_op
];
238 #ifdef CONFIG_BLK_DEV_INTEGRITY
240 extern void sd_dif_config_host(struct scsi_disk
*);
241 extern void sd_dif_prepare(struct scsi_cmnd
*scmd
);
242 extern void sd_dif_complete(struct scsi_cmnd
*, unsigned int);
244 #else /* CONFIG_BLK_DEV_INTEGRITY */
246 static inline void sd_dif_config_host(struct scsi_disk
*disk
)
249 static inline int sd_dif_prepare(struct scsi_cmnd
*scmd
)
253 static inline void sd_dif_complete(struct scsi_cmnd
*cmd
, unsigned int a
)
257 #endif /* CONFIG_BLK_DEV_INTEGRITY */
259 static inline int sd_is_zoned(struct scsi_disk
*sdkp
)
261 return sdkp
->zoned
== 1 || sdkp
->device
->type
== TYPE_ZBC
;
264 #ifdef CONFIG_BLK_DEV_ZONED
266 extern int sd_zbc_read_zones(struct scsi_disk
*sdkp
, unsigned char *buffer
);
267 extern void sd_zbc_remove(struct scsi_disk
*sdkp
);
268 extern void sd_zbc_print_zones(struct scsi_disk
*sdkp
);
269 extern int sd_zbc_setup_write_cmnd(struct scsi_cmnd
*cmd
);
270 extern void sd_zbc_cancel_write_cmnd(struct scsi_cmnd
*cmd
);
271 extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd
*cmd
);
272 extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd
*cmd
);
273 extern void sd_zbc_complete(struct scsi_cmnd
*cmd
, unsigned int good_bytes
,
274 struct scsi_sense_hdr
*sshdr
);
276 #else /* CONFIG_BLK_DEV_ZONED */
278 static inline int sd_zbc_read_zones(struct scsi_disk
*sdkp
,
284 static inline void sd_zbc_remove(struct scsi_disk
*sdkp
) {}
286 static inline void sd_zbc_print_zones(struct scsi_disk
*sdkp
) {}
288 static inline int sd_zbc_setup_write_cmnd(struct scsi_cmnd
*cmd
)
290 /* Let the drive fail requests */
294 static inline void sd_zbc_cancel_write_cmnd(struct scsi_cmnd
*cmd
) {}
296 static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd
*cmd
)
298 return BLKPREP_INVALID
;
301 static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd
*cmd
)
303 return BLKPREP_INVALID
;
306 static inline void sd_zbc_complete(struct scsi_cmnd
*cmd
,
307 unsigned int good_bytes
,
308 struct scsi_sense_hdr
*sshdr
) {}
310 #endif /* CONFIG_BLK_DEV_ZONED */
312 #endif /* _SCSI_DISK_H */