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_driver *driver; /* always &sd_template */ 72 struct scsi_device *device; 73 struct device dev; 74 struct gendisk *disk; 75 struct opal_dev *opal_dev; 76 #ifdef CONFIG_BLK_DEV_ZONED 77 u32 nr_zones; 78 u32 zone_blocks; 79 u32 zones_optimal_open; 80 u32 zones_optimal_nonseq; 81 u32 zones_max_open; 82 u32 *zones_wp_offset; 83 spinlock_t zones_wp_offset_lock; 84 u32 *rev_wp_offset; 85 struct mutex rev_mutex; 86 struct work_struct zone_wp_offset_work; 87 char *zone_wp_update_buf; 88 #endif 89 atomic_t openers; 90 sector_t capacity; /* size in logical blocks */ 91 u32 max_xfer_blocks; 92 u32 opt_xfer_blocks; 93 u32 max_ws_blocks; 94 u32 max_unmap_blocks; 95 u32 unmap_granularity; 96 u32 unmap_alignment; 97 u32 index; 98 unsigned int physical_block_size; 99 unsigned int max_medium_access_timeouts; 100 unsigned int medium_access_timed_out; 101 u8 media_present; 102 u8 write_prot; 103 u8 protection_type;/* Data Integrity Field */ 104 u8 provisioning_mode; 105 u8 zeroing_mode; 106 unsigned ATO : 1; /* state of disk ATO bit */ 107 unsigned cache_override : 1; /* temp override of WCE,RCD */ 108 unsigned WCE : 1; /* state of disk WCE bit */ 109 unsigned RCD : 1; /* state of disk RCD bit, unused */ 110 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 111 unsigned first_scan : 1; 112 unsigned lbpme : 1; 113 unsigned lbprz : 1; 114 unsigned lbpu : 1; 115 unsigned lbpws : 1; 116 unsigned lbpws10 : 1; 117 unsigned lbpvpd : 1; 118 unsigned ws10 : 1; 119 unsigned ws16 : 1; 120 unsigned rc_basis: 2; 121 unsigned zoned: 2; 122 unsigned urswrz : 1; 123 unsigned security : 1; 124 unsigned ignore_medium_access_errors : 1; 125 }; 126 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 127 128 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 129 { 130 return container_of(disk->private_data, struct scsi_disk, driver); 131 } 132 133 #define sd_printk(prefix, sdsk, fmt, a...) \ 134 (sdsk)->disk ? \ 135 sdev_prefix_printk(prefix, (sdsk)->device, \ 136 (sdsk)->disk->disk_name, fmt, ##a) : \ 137 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 138 139 #define sd_first_printk(prefix, sdsk, fmt, a...) \ 140 do { \ 141 if ((sdsk)->first_scan) \ 142 sd_printk(prefix, sdsk, fmt, ##a); \ 143 } while (0) 144 145 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) 146 { 147 switch (scmd->cmnd[0]) { 148 case READ_6: 149 case READ_10: 150 case READ_12: 151 case READ_16: 152 case SYNCHRONIZE_CACHE: 153 case VERIFY: 154 case VERIFY_12: 155 case VERIFY_16: 156 case WRITE_6: 157 case WRITE_10: 158 case WRITE_12: 159 case WRITE_16: 160 case WRITE_SAME: 161 case WRITE_SAME_16: 162 case UNMAP: 163 return 1; 164 case VARIABLE_LENGTH_CMD: 165 switch (scmd->cmnd[9]) { 166 case READ_32: 167 case VERIFY_32: 168 case WRITE_32: 169 case WRITE_SAME_32: 170 return 1; 171 } 172 } 173 174 return 0; 175 } 176 177 static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks) 178 { 179 return blocks << (ilog2(sdev->sector_size) - 9); 180 } 181 182 static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) 183 { 184 return blocks * sdev->sector_size; 185 } 186 187 static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes) 188 { 189 return bytes >> ilog2(sdev->sector_size); 190 } 191 192 static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector) 193 { 194 return sector >> (ilog2(sdev->sector_size) - 9); 195 } 196 197 #ifdef CONFIG_BLK_DEV_INTEGRITY 198 199 extern void sd_dif_config_host(struct scsi_disk *); 200 201 #else /* CONFIG_BLK_DEV_INTEGRITY */ 202 203 static inline void sd_dif_config_host(struct scsi_disk *disk) 204 { 205 } 206 207 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 208 209 static inline int sd_is_zoned(struct scsi_disk *sdkp) 210 { 211 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC; 212 } 213 214 #ifdef CONFIG_BLK_DEV_ZONED 215 216 int sd_zbc_init_disk(struct scsi_disk *sdkp); 217 void sd_zbc_release_disk(struct scsi_disk *sdkp); 218 extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); 219 extern void sd_zbc_print_zones(struct scsi_disk *sdkp); 220 blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 221 unsigned char op, bool all); 222 unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, 223 struct scsi_sense_hdr *sshdr); 224 int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, 225 unsigned int nr_zones, report_zones_cb cb, void *data); 226 227 blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba, 228 unsigned int nr_blocks); 229 230 #else /* CONFIG_BLK_DEV_ZONED */ 231 232 static inline int sd_zbc_init(void) 233 { 234 return 0; 235 } 236 237 static inline int sd_zbc_init_disk(struct scsi_disk *sdkp) 238 { 239 return 0; 240 } 241 242 static inline void sd_zbc_exit(void) {} 243 static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {} 244 245 static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, 246 unsigned char *buf) 247 { 248 return 0; 249 } 250 251 static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {} 252 253 static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 254 unsigned char op, 255 bool all) 256 { 257 return BLK_STS_TARGET; 258 } 259 260 static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, 261 unsigned int good_bytes, struct scsi_sense_hdr *sshdr) 262 { 263 return 0; 264 } 265 266 static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, 267 sector_t *lba, 268 unsigned int nr_blocks) 269 { 270 return BLK_STS_TARGET; 271 } 272 273 #define sd_zbc_report_zones NULL 274 275 #endif /* CONFIG_BLK_DEV_ZONED */ 276 277 void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr); 278 void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result); 279 280 #endif /* _SCSI_DISK_H */ 281