1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SCSI_DISK_H 3 #define _SCSI_DISK_H 4 5 /* 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 8 * much numberspace. 9 */ 10 #define SD_MAJORS 16 11 12 /* 13 * Time out in seconds for disks and Magneto-opticals (which are slower). 14 */ 15 #define SD_TIMEOUT (30 * HZ) 16 #define SD_MOD_TIMEOUT (75 * HZ) 17 /* 18 * Flush timeout is a multiplier over the standard device timeout which is 19 * user modifiable via sysfs but initially set to SD_TIMEOUT 20 */ 21 #define SD_FLUSH_TIMEOUT_MULTIPLIER 2 22 #define SD_WRITE_SAME_TIMEOUT (120 * HZ) 23 24 /* 25 * Number of allowed retries 26 */ 27 #define SD_MAX_RETRIES 5 28 #define SD_PASSTHROUGH_RETRIES 1 29 #define SD_MAX_MEDIUM_TIMEOUTS 2 30 31 /* 32 * Size of the initial data buffer for mode and read capacity data 33 */ 34 #define SD_BUF_SIZE 512 35 36 /* 37 * Number of sectors at the end of the device to avoid multi-sector 38 * accesses to in the case of last_sector_bug 39 */ 40 #define SD_LAST_BUGGY_SECTORS 8 41 42 enum { 43 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ 44 SD_MEMPOOL_SIZE = 2, /* CDB pool size */ 45 }; 46 47 enum { 48 SD_DEF_XFER_BLOCKS = 0xffff, 49 SD_MAX_XFER_BLOCKS = 0xffffffff, 50 SD_MAX_WS10_BLOCKS = 0xffff, 51 SD_MAX_WS16_BLOCKS = 0x7fffff, 52 }; 53 54 enum { 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 */ 61 }; 62 63 enum { 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 */ 68 }; 69 70 struct scsi_disk { 71 struct scsi_device *device; 72 73 /* 74 * disk_dev is used to show attributes in /sys/class/scsi_disk/, 75 * but otherwise not really needed. Do not use for refcounting. 76 */ 77 struct device disk_dev; 78 struct gendisk *disk; 79 struct opal_dev *opal_dev; 80 #ifdef CONFIG_BLK_DEV_ZONED 81 u32 nr_zones; 82 u32 rev_nr_zones; 83 u32 zone_blocks; 84 u32 rev_zone_blocks; 85 u32 zones_optimal_open; 86 u32 zones_optimal_nonseq; 87 u32 zones_max_open; 88 u32 *zones_wp_offset; 89 spinlock_t zones_wp_offset_lock; 90 u32 *rev_wp_offset; 91 struct mutex rev_mutex; 92 struct work_struct zone_wp_offset_work; 93 char *zone_wp_update_buf; 94 #endif 95 atomic_t openers; 96 sector_t capacity; /* size in logical blocks */ 97 int max_retries; 98 u32 max_xfer_blocks; 99 u32 opt_xfer_blocks; 100 u32 max_ws_blocks; 101 u32 max_unmap_blocks; 102 u32 unmap_granularity; 103 u32 unmap_alignment; 104 u32 index; 105 unsigned int physical_block_size; 106 unsigned int max_medium_access_timeouts; 107 unsigned int medium_access_timed_out; 108 u8 media_present; 109 u8 write_prot; 110 u8 protection_type;/* Data Integrity Field */ 111 u8 provisioning_mode; 112 u8 zeroing_mode; 113 u8 nr_actuators; /* Number of actuators */ 114 unsigned ATO : 1; /* state of disk ATO bit */ 115 unsigned cache_override : 1; /* temp override of WCE,RCD */ 116 unsigned WCE : 1; /* state of disk WCE bit */ 117 unsigned RCD : 1; /* state of disk RCD bit, unused */ 118 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 119 unsigned first_scan : 1; 120 unsigned lbpme : 1; 121 unsigned lbprz : 1; 122 unsigned lbpu : 1; 123 unsigned lbpws : 1; 124 unsigned lbpws10 : 1; 125 unsigned lbpvpd : 1; 126 unsigned ws10 : 1; 127 unsigned ws16 : 1; 128 unsigned rc_basis: 2; 129 unsigned zoned: 2; 130 unsigned urswrz : 1; 131 unsigned security : 1; 132 unsigned ignore_medium_access_errors : 1; 133 }; 134 #define to_scsi_disk(obj) container_of(obj, struct scsi_disk, disk_dev) 135 136 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 137 { 138 return disk->private_data; 139 } 140 141 #define sd_printk(prefix, sdsk, fmt, a...) \ 142 (sdsk)->disk ? \ 143 sdev_prefix_printk(prefix, (sdsk)->device, \ 144 (sdsk)->disk->disk_name, fmt, ##a) : \ 145 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 146 147 #define sd_first_printk(prefix, sdsk, fmt, a...) \ 148 do { \ 149 if ((sdsk)->first_scan) \ 150 sd_printk(prefix, sdsk, fmt, ##a); \ 151 } while (0) 152 153 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) 154 { 155 switch (scmd->cmnd[0]) { 156 case READ_6: 157 case READ_10: 158 case READ_12: 159 case READ_16: 160 case SYNCHRONIZE_CACHE: 161 case VERIFY: 162 case VERIFY_12: 163 case VERIFY_16: 164 case WRITE_6: 165 case WRITE_10: 166 case WRITE_12: 167 case WRITE_16: 168 case WRITE_SAME: 169 case WRITE_SAME_16: 170 case UNMAP: 171 return 1; 172 case VARIABLE_LENGTH_CMD: 173 switch (scmd->cmnd[9]) { 174 case READ_32: 175 case VERIFY_32: 176 case WRITE_32: 177 case WRITE_SAME_32: 178 return 1; 179 } 180 } 181 182 return 0; 183 } 184 185 static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks) 186 { 187 return blocks << (ilog2(sdev->sector_size) - 9); 188 } 189 190 static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) 191 { 192 return blocks * sdev->sector_size; 193 } 194 195 static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes) 196 { 197 return bytes >> ilog2(sdev->sector_size); 198 } 199 200 static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector) 201 { 202 return sector >> (ilog2(sdev->sector_size) - 9); 203 } 204 205 #ifdef CONFIG_BLK_DEV_INTEGRITY 206 207 extern void sd_dif_config_host(struct scsi_disk *); 208 209 #else /* CONFIG_BLK_DEV_INTEGRITY */ 210 211 static inline void sd_dif_config_host(struct scsi_disk *disk) 212 { 213 } 214 215 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 216 217 static inline int sd_is_zoned(struct scsi_disk *sdkp) 218 { 219 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC; 220 } 221 222 #ifdef CONFIG_BLK_DEV_ZONED 223 224 void sd_zbc_release_disk(struct scsi_disk *sdkp); 225 int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); 226 int sd_zbc_revalidate_zones(struct scsi_disk *sdkp); 227 blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 228 unsigned char op, bool all); 229 unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, 230 struct scsi_sense_hdr *sshdr); 231 int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, 232 unsigned int nr_zones, report_zones_cb cb, void *data); 233 234 blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba, 235 unsigned int nr_blocks); 236 237 #else /* CONFIG_BLK_DEV_ZONED */ 238 239 static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {} 240 241 static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, 242 unsigned char *buf) 243 { 244 return 0; 245 } 246 247 static inline int sd_zbc_revalidate_zones(struct scsi_disk *sdkp) 248 { 249 return 0; 250 } 251 252 static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 253 unsigned char op, 254 bool all) 255 { 256 return BLK_STS_TARGET; 257 } 258 259 static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, 260 unsigned int good_bytes, struct scsi_sense_hdr *sshdr) 261 { 262 return good_bytes; 263 } 264 265 static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, 266 sector_t *lba, 267 unsigned int nr_blocks) 268 { 269 return BLK_STS_TARGET; 270 } 271 272 #define sd_zbc_report_zones NULL 273 274 #endif /* CONFIG_BLK_DEV_ZONED */ 275 276 void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr); 277 void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result); 278 279 #endif /* _SCSI_DISK_H */ 280