1 /* SPDX-License-Identifier: GPL-2.0 */
6 * More than enough for everybody ;) The huge number of majors
7 * is a leftover from 16bit dev_t days, we don't really need that
13 * Time out in seconds for disks and Magneto-opticals (which are slower).
15 #define SD_TIMEOUT (30 * HZ)
16 #define SD_MOD_TIMEOUT (75 * HZ)
18 * Flush timeout is a multiplier over the standard device timeout which is
19 * user modifiable via sysfs but initially set to SD_TIMEOUT
21 #define SD_FLUSH_TIMEOUT_MULTIPLIER 2
22 #define SD_WRITE_SAME_TIMEOUT (120 * HZ)
25 * Number of allowed retries
27 #define SD_MAX_RETRIES 5
28 #define SD_PASSTHROUGH_RETRIES 1
29 #define SD_MAX_MEDIUM_TIMEOUTS 2
32 * Size of the initial data buffer for mode and read capacity data
34 #define SD_BUF_SIZE 512
37 * Number of sectors at the end of the device to avoid multi-sector
38 * accesses to in the case of last_sector_bug
40 #define SD_LAST_BUGGY_SECTORS 8
43 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
44 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
48 SD_DEF_XFER_BLOCKS = 0xffff,
49 SD_MAX_XFER_BLOCKS = 0xffffffff,
50 SD_MAX_WS10_BLOCKS = 0xffff,
51 SD_MAX_WS16_BLOCKS = 0x7fffff,
55 SD_LBP_FULL = 0, /* Full logical block provisioning */
56 SD_LBP_UNMAP, /* Use UNMAP command */
57 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
58 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
59 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
60 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
64 SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */
65 SD_ZERO_WS, /* Use WRITE SAME(10/16) command */
66 SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */
67 SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */
71 struct scsi_driver *driver; /* always &sd_template */
72 struct scsi_device *device;
75 struct opal_dev *opal_dev;
76 #ifdef CONFIG_BLK_DEV_ZONED
77 unsigned int nr_zones;
78 unsigned int zone_blocks;
79 unsigned int zone_shift;
80 unsigned int zones_optimal_open;
81 unsigned int zones_optimal_nonseq;
82 unsigned int zones_max_open;
85 sector_t capacity; /* size in logical blocks */
90 u32 unmap_granularity;
93 unsigned int physical_block_size;
94 unsigned int max_medium_access_timeouts;
95 unsigned int medium_access_timed_out;
98 u8 protection_type;/* Data Integrity Field */
101 unsigned ATO : 1; /* state of disk ATO bit */
102 unsigned cache_override : 1; /* temp override of WCE,RCD */
103 unsigned WCE : 1; /* state of disk WCE bit */
104 unsigned RCD : 1; /* state of disk RCD bit, unused */
105 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
106 unsigned first_scan : 1;
111 unsigned lbpws10 : 1;
115 unsigned rc_basis: 2;
118 unsigned security : 1;
119 unsigned ignore_medium_access_errors : 1;
121 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
123 static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
125 return container_of(disk->private_data, struct scsi_disk, driver);
128 #define sd_printk(prefix, sdsk, fmt, a...) \
130 sdev_prefix_printk(prefix, (sdsk)->device, \
131 (sdsk)->disk->disk_name, fmt, ##a) : \
132 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
134 #define sd_first_printk(prefix, sdsk, fmt, a...) \
136 if ((sdkp)->first_scan) \
137 sd_printk(prefix, sdsk, fmt, ##a); \
140 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
142 switch (scmd->cmnd[0]) {
147 case SYNCHRONIZE_CACHE:
159 case VARIABLE_LENGTH_CMD:
160 switch (scmd->cmnd[9]) {
172 static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
174 return blocks << (ilog2(sdev->sector_size) - 9);
177 static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
179 return blocks * sdev->sector_size;
182 static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
184 return bytes >> ilog2(sdev->sector_size);
187 static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
189 return sector >> (ilog2(sdev->sector_size) - 9);
193 * Look up the DIX operation based on whether the command is read or
194 * write and whether dix and dif are enabled.
196 static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
198 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
199 const unsigned int ops[] = { /* wrt dix dif */
200 SCSI_PROT_NORMAL, /* 0 0 0 */
201 SCSI_PROT_READ_STRIP, /* 0 0 1 */
202 SCSI_PROT_READ_INSERT, /* 0 1 0 */
203 SCSI_PROT_READ_PASS, /* 0 1 1 */
204 SCSI_PROT_NORMAL, /* 1 0 0 */
205 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
206 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
207 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
210 return ops[write << 2 | dix << 1 | dif];
214 * Returns a mask of the protection flags that are valid for a given DIX
217 static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
219 const unsigned int flag_mask[] = {
220 [SCSI_PROT_NORMAL] = 0,
222 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
223 SCSI_PROT_GUARD_CHECK |
224 SCSI_PROT_REF_CHECK |
225 SCSI_PROT_REF_INCREMENT,
227 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
228 SCSI_PROT_IP_CHECKSUM,
230 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
231 SCSI_PROT_GUARD_CHECK |
232 SCSI_PROT_REF_CHECK |
233 SCSI_PROT_REF_INCREMENT |
234 SCSI_PROT_IP_CHECKSUM,
236 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
237 SCSI_PROT_REF_INCREMENT,
239 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
240 SCSI_PROT_REF_CHECK |
241 SCSI_PROT_REF_INCREMENT |
242 SCSI_PROT_IP_CHECKSUM,
244 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
245 SCSI_PROT_GUARD_CHECK |
246 SCSI_PROT_REF_CHECK |
247 SCSI_PROT_REF_INCREMENT |
248 SCSI_PROT_IP_CHECKSUM,
251 return flag_mask[prot_op];
254 #ifdef CONFIG_BLK_DEV_INTEGRITY
256 extern void sd_dif_config_host(struct scsi_disk *);
257 extern void sd_dif_prepare(struct scsi_cmnd *scmd);
258 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
260 #else /* CONFIG_BLK_DEV_INTEGRITY */
262 static inline void sd_dif_config_host(struct scsi_disk *disk)
265 static inline int sd_dif_prepare(struct scsi_cmnd *scmd)
269 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
273 #endif /* CONFIG_BLK_DEV_INTEGRITY */
275 static inline int sd_is_zoned(struct scsi_disk *sdkp)
277 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
280 #ifdef CONFIG_BLK_DEV_ZONED
282 extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
283 extern void sd_zbc_remove(struct scsi_disk *sdkp);
284 extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
285 extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd);
286 extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd);
287 extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
288 struct scsi_sense_hdr *sshdr);
290 #else /* CONFIG_BLK_DEV_ZONED */
292 static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
298 static inline void sd_zbc_remove(struct scsi_disk *sdkp) {}
300 static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {}
302 static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
304 return BLKPREP_INVALID;
307 static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd)
309 return BLKPREP_INVALID;
312 static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
313 unsigned int good_bytes,
314 struct scsi_sense_hdr *sshdr) {}
316 #endif /* CONFIG_BLK_DEV_ZONED */
318 #endif /* _SCSI_DISK_H */