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 u8 nr_actuators; /* Number of actuators */ 110 unsigned ATO : 1; /* state of disk ATO bit */ 111 unsigned cache_override : 1; /* temp override of WCE,RCD */ 112 unsigned WCE : 1; /* state of disk WCE bit */ 113 unsigned RCD : 1; /* state of disk RCD bit, unused */ 114 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 115 unsigned first_scan : 1; 116 unsigned lbpme : 1; 117 unsigned lbprz : 1; 118 unsigned lbpu : 1; 119 unsigned lbpws : 1; 120 unsigned lbpws10 : 1; 121 unsigned lbpvpd : 1; 122 unsigned ws10 : 1; 123 unsigned ws16 : 1; 124 unsigned rc_basis: 2; 125 unsigned zoned: 2; 126 unsigned urswrz : 1; 127 unsigned security : 1; 128 unsigned ignore_medium_access_errors : 1; 129 }; 130 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 131 132 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 133 { 134 return container_of(disk->private_data, struct scsi_disk, driver); 135 } 136 137 #define sd_printk(prefix, sdsk, fmt, a...) \ 138 (sdsk)->disk ? \ 139 sdev_prefix_printk(prefix, (sdsk)->device, \ 140 (sdsk)->disk->disk_name, fmt, ##a) : \ 141 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 142 143 #define sd_first_printk(prefix, sdsk, fmt, a...) \ 144 do { \ 145 if ((sdsk)->first_scan) \ 146 sd_printk(prefix, sdsk, fmt, ##a); \ 147 } while (0) 148 149 static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) 150 { 151 switch (scmd->cmnd[0]) { 152 case READ_6: 153 case READ_10: 154 case READ_12: 155 case READ_16: 156 case SYNCHRONIZE_CACHE: 157 case VERIFY: 158 case VERIFY_12: 159 case VERIFY_16: 160 case WRITE_6: 161 case WRITE_10: 162 case WRITE_12: 163 case WRITE_16: 164 case WRITE_SAME: 165 case WRITE_SAME_16: 166 case UNMAP: 167 return 1; 168 case VARIABLE_LENGTH_CMD: 169 switch (scmd->cmnd[9]) { 170 case READ_32: 171 case VERIFY_32: 172 case WRITE_32: 173 case WRITE_SAME_32: 174 return 1; 175 } 176 } 177 178 return 0; 179 } 180 181 static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks) 182 { 183 return blocks << (ilog2(sdev->sector_size) - 9); 184 } 185 186 static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) 187 { 188 return blocks * sdev->sector_size; 189 } 190 191 static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes) 192 { 193 return bytes >> ilog2(sdev->sector_size); 194 } 195 196 static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector) 197 { 198 return sector >> (ilog2(sdev->sector_size) - 9); 199 } 200 201 #ifdef CONFIG_BLK_DEV_INTEGRITY 202 203 extern void sd_dif_config_host(struct scsi_disk *); 204 205 #else /* CONFIG_BLK_DEV_INTEGRITY */ 206 207 static inline void sd_dif_config_host(struct scsi_disk *disk) 208 { 209 } 210 211 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 212 213 static inline int sd_is_zoned(struct scsi_disk *sdkp) 214 { 215 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC; 216 } 217 218 #ifdef CONFIG_BLK_DEV_ZONED 219 220 void sd_zbc_release_disk(struct scsi_disk *sdkp); 221 int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); 222 int sd_zbc_revalidate_zones(struct scsi_disk *sdkp); 223 blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 224 unsigned char op, bool all); 225 unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, 226 struct scsi_sense_hdr *sshdr); 227 int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, 228 unsigned int nr_zones, report_zones_cb cb, void *data); 229 230 blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba, 231 unsigned int nr_blocks); 232 233 #else /* CONFIG_BLK_DEV_ZONED */ 234 235 static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {} 236 237 static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, 238 unsigned char *buf) 239 { 240 return 0; 241 } 242 243 static inline int sd_zbc_revalidate_zones(struct scsi_disk *sdkp) 244 { 245 return 0; 246 } 247 248 static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, 249 unsigned char op, 250 bool all) 251 { 252 return BLK_STS_TARGET; 253 } 254 255 static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, 256 unsigned int good_bytes, struct scsi_sense_hdr *sshdr) 257 { 258 return good_bytes; 259 } 260 261 static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, 262 sector_t *lba, 263 unsigned int nr_blocks) 264 { 265 return BLK_STS_TARGET; 266 } 267 268 #define sd_zbc_report_zones NULL 269 270 #endif /* CONFIG_BLK_DEV_ZONED */ 271 272 void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr); 273 void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result); 274 275 #endif /* _SCSI_DISK_H */ 276