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 */