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