1 #ifndef _SCSI_DISK_H 2 #define _SCSI_DISK_H 3 4 /* 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 7 * much numberspace. 8 */ 9 #define SD_MAJORS 16 10 11 /* 12 * Time out in seconds for disks and Magneto-opticals (which are slower). 13 */ 14 #define SD_TIMEOUT (30 * HZ) 15 #define SD_MOD_TIMEOUT (75 * HZ) 16 #define SD_FLUSH_TIMEOUT (60 * HZ) 17 18 /* 19 * Number of allowed retries 20 */ 21 #define SD_MAX_RETRIES 5 22 #define SD_PASSTHROUGH_RETRIES 1 23 #define SD_MAX_MEDIUM_TIMEOUTS 2 24 25 /* 26 * Size of the initial data buffer for mode and read capacity data 27 */ 28 #define SD_BUF_SIZE 512 29 30 /* 31 * Number of sectors at the end of the device to avoid multi-sector 32 * accesses to in the case of last_sector_bug 33 */ 34 #define SD_LAST_BUGGY_SECTORS 8 35 36 enum { 37 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ 38 SD_MEMPOOL_SIZE = 2, /* CDB pool size */ 39 }; 40 41 enum { 42 SD_LBP_FULL = 0, /* Full logical block provisioning */ 43 SD_LBP_UNMAP, /* Use UNMAP command */ 44 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */ 45 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */ 46 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */ 47 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */ 48 }; 49 50 struct scsi_disk { 51 struct scsi_driver *driver; /* always &sd_template */ 52 struct scsi_device *device; 53 struct device dev; 54 struct gendisk *disk; 55 atomic_t openers; 56 sector_t capacity; /* size in 512-byte sectors */ 57 u32 max_ws_blocks; 58 u32 max_unmap_blocks; 59 u32 unmap_granularity; 60 u32 unmap_alignment; 61 u32 index; 62 unsigned int physical_block_size; 63 unsigned int max_medium_access_timeouts; 64 unsigned int medium_access_timed_out; 65 u8 media_present; 66 u8 write_prot; 67 u8 protection_type;/* Data Integrity Field */ 68 u8 provisioning_mode; 69 unsigned ATO : 1; /* state of disk ATO bit */ 70 unsigned WCE : 1; /* state of disk WCE bit */ 71 unsigned RCD : 1; /* state of disk RCD bit, unused */ 72 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 73 unsigned first_scan : 1; 74 unsigned lbpme : 1; 75 unsigned lbprz : 1; 76 unsigned lbpu : 1; 77 unsigned lbpws : 1; 78 unsigned lbpws10 : 1; 79 unsigned lbpvpd : 1; 80 }; 81 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 82 83 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 84 { 85 return container_of(disk->private_data, struct scsi_disk, driver); 86 } 87 88 #define sd_printk(prefix, sdsk, fmt, a...) \ 89 (sdsk)->disk ? \ 90 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 91 (sdsk)->disk->disk_name, ##a) : \ 92 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 93 94 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) 95 { 96 switch (scmd->cmnd[0]) { 97 case READ_6: 98 case READ_10: 99 case READ_12: 100 case READ_16: 101 case SYNCHRONIZE_CACHE: 102 case VERIFY: 103 case VERIFY_12: 104 case VERIFY_16: 105 case WRITE_6: 106 case WRITE_10: 107 case WRITE_12: 108 case WRITE_16: 109 case WRITE_SAME: 110 case WRITE_SAME_16: 111 case UNMAP: 112 return 1; 113 case VARIABLE_LENGTH_CMD: 114 switch (scmd->cmnd[9]) { 115 case READ_32: 116 case VERIFY_32: 117 case WRITE_32: 118 case WRITE_SAME_32: 119 return 1; 120 } 121 } 122 123 return 0; 124 } 125 126 /* 127 * A DIF-capable target device can be formatted with different 128 * protection schemes. Currently 0 through 3 are defined: 129 * 130 * Type 0 is regular (unprotected) I/O 131 * 132 * Type 1 defines the contents of the guard and reference tags 133 * 134 * Type 2 defines the contents of the guard and reference tags and 135 * uses 32-byte commands to seed the latter 136 * 137 * Type 3 defines the contents of the guard tag only 138 */ 139 140 enum sd_dif_target_protection_types { 141 SD_DIF_TYPE0_PROTECTION = 0x0, 142 SD_DIF_TYPE1_PROTECTION = 0x1, 143 SD_DIF_TYPE2_PROTECTION = 0x2, 144 SD_DIF_TYPE3_PROTECTION = 0x3, 145 }; 146 147 /* 148 * Data Integrity Field tuple. 149 */ 150 struct sd_dif_tuple { 151 __be16 guard_tag; /* Checksum */ 152 __be16 app_tag; /* Opaque storage */ 153 __be32 ref_tag; /* Target LBA or indirect LBA */ 154 }; 155 156 #ifdef CONFIG_BLK_DEV_INTEGRITY 157 158 extern void sd_dif_config_host(struct scsi_disk *); 159 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 160 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 161 162 #else /* CONFIG_BLK_DEV_INTEGRITY */ 163 164 static inline void sd_dif_config_host(struct scsi_disk *disk) 165 { 166 } 167 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 168 { 169 return 0; 170 } 171 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 172 { 173 } 174 175 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 176 177 #endif /* _SCSI_DISK_H */ 178