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)
16 #define SD_FLUSH_TIMEOUT (60 * HZ)
17 #define SD_WRITE_SAME_TIMEOUT (120 * HZ)
20 * Number of allowed retries
22 #define SD_MAX_RETRIES 5
23 #define SD_PASSTHROUGH_RETRIES 1
24 #define SD_MAX_MEDIUM_TIMEOUTS 2
27 * Size of the initial data buffer for mode and read capacity data
29 #define SD_BUF_SIZE 512
32 * Number of sectors at the end of the device to avoid multi-sector
33 * accesses to in the case of last_sector_bug
35 #define SD_LAST_BUGGY_SECTORS 8
38 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
39 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
43 SD_MAX_WS10_BLOCKS = 0xffff,
44 SD_MAX_WS16_BLOCKS = 0x7fffff,
48 SD_LBP_FULL = 0, /* Full logical block provisioning */
49 SD_LBP_UNMAP, /* Use UNMAP command */
50 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
51 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
52 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
53 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
57 struct scsi_driver *driver; /* always &sd_template */
58 struct scsi_device *device;
62 sector_t capacity; /* size in 512-byte sectors */
65 u32 unmap_granularity;
68 unsigned int physical_block_size;
69 unsigned int max_medium_access_timeouts;
70 unsigned int medium_access_timed_out;
73 u8 protection_type;/* Data Integrity Field */
75 unsigned ATO : 1; /* state of disk ATO bit */
76 unsigned cache_override : 1; /* temp override of WCE,RCD */
77 unsigned WCE : 1; /* state of disk WCE bit */
78 unsigned RCD : 1; /* state of disk RCD bit, unused */
79 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
80 unsigned first_scan : 1;
90 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
92 static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
94 return container_of(disk->private_data, struct scsi_disk, driver);
97 #define sd_printk(prefix, sdsk, fmt, a...) \
99 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
100 (sdsk)->disk->disk_name, ##a) : \
101 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
103 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
105 switch (scmd->cmnd[0]) {
110 case SYNCHRONIZE_CACHE:
122 case VARIABLE_LENGTH_CMD:
123 switch (scmd->cmnd[9]) {
136 * A DIF-capable target device can be formatted with different
137 * protection schemes. Currently 0 through 3 are defined:
139 * Type 0 is regular (unprotected) I/O
141 * Type 1 defines the contents of the guard and reference tags
143 * Type 2 defines the contents of the guard and reference tags and
144 * uses 32-byte commands to seed the latter
146 * Type 3 defines the contents of the guard tag only
149 enum sd_dif_target_protection_types {
150 SD_DIF_TYPE0_PROTECTION = 0x0,
151 SD_DIF_TYPE1_PROTECTION = 0x1,
152 SD_DIF_TYPE2_PROTECTION = 0x2,
153 SD_DIF_TYPE3_PROTECTION = 0x3,
157 * Data Integrity Field tuple.
159 struct sd_dif_tuple {
160 __be16 guard_tag; /* Checksum */
161 __be16 app_tag; /* Opaque storage */
162 __be32 ref_tag; /* Target LBA or indirect LBA */
165 #ifdef CONFIG_BLK_DEV_INTEGRITY
167 extern void sd_dif_config_host(struct scsi_disk *);
168 extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
169 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
171 #else /* CONFIG_BLK_DEV_INTEGRITY */
173 static inline void sd_dif_config_host(struct scsi_disk *disk)
176 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
180 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
184 #endif /* CONFIG_BLK_DEV_INTEGRITY */
186 #endif /* _SCSI_DISK_H */