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 24 /* 25 * Size of the initial data buffer for mode and read capacity data 26 */ 27 #define SD_BUF_SIZE 512 28 29 /* 30 * Number of sectors at the end of the device to avoid multi-sector 31 * accesses to in the case of last_sector_bug 32 */ 33 #define SD_LAST_BUGGY_SECTORS 8 34 35 enum { 36 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ 37 SD_MEMPOOL_SIZE = 2, /* CDB pool size */ 38 }; 39 40 enum { 41 SD_LBP_FULL = 0, /* Full logical block provisioning */ 42 SD_LBP_UNMAP, /* Use UNMAP command */ 43 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */ 44 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */ 45 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */ 46 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */ 47 }; 48 49 struct scsi_disk { 50 struct scsi_driver *driver; /* always &sd_template */ 51 struct scsi_device *device; 52 struct device dev; 53 struct gendisk *disk; 54 atomic_t openers; 55 sector_t capacity; /* size in 512-byte sectors */ 56 u32 max_ws_blocks; 57 u32 max_unmap_blocks; 58 u32 unmap_granularity; 59 u32 unmap_alignment; 60 u32 index; 61 unsigned int physical_block_size; 62 u8 media_present; 63 u8 write_prot; 64 u8 protection_type;/* Data Integrity Field */ 65 u8 provisioning_mode; 66 unsigned ATO : 1; /* state of disk ATO bit */ 67 unsigned WCE : 1; /* state of disk WCE bit */ 68 unsigned RCD : 1; /* state of disk RCD bit, unused */ 69 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 70 unsigned first_scan : 1; 71 unsigned lbpme : 1; 72 unsigned lbprz : 1; 73 unsigned lbpu : 1; 74 unsigned lbpws : 1; 75 unsigned lbpws10 : 1; 76 unsigned lbpvpd : 1; 77 }; 78 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 79 80 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 81 { 82 return container_of(disk->private_data, struct scsi_disk, driver); 83 } 84 85 #define sd_printk(prefix, sdsk, fmt, a...) \ 86 (sdsk)->disk ? \ 87 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 88 (sdsk)->disk->disk_name, ##a) : \ 89 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 90 91 /* 92 * A DIF-capable target device can be formatted with different 93 * protection schemes. Currently 0 through 3 are defined: 94 * 95 * Type 0 is regular (unprotected) I/O 96 * 97 * Type 1 defines the contents of the guard and reference tags 98 * 99 * Type 2 defines the contents of the guard and reference tags and 100 * uses 32-byte commands to seed the latter 101 * 102 * Type 3 defines the contents of the guard tag only 103 */ 104 105 enum sd_dif_target_protection_types { 106 SD_DIF_TYPE0_PROTECTION = 0x0, 107 SD_DIF_TYPE1_PROTECTION = 0x1, 108 SD_DIF_TYPE2_PROTECTION = 0x2, 109 SD_DIF_TYPE3_PROTECTION = 0x3, 110 }; 111 112 /* 113 * Data Integrity Field tuple. 114 */ 115 struct sd_dif_tuple { 116 __be16 guard_tag; /* Checksum */ 117 __be16 app_tag; /* Opaque storage */ 118 __be32 ref_tag; /* Target LBA or indirect LBA */ 119 }; 120 121 #ifdef CONFIG_BLK_DEV_INTEGRITY 122 123 extern void sd_dif_config_host(struct scsi_disk *); 124 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 125 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 126 127 #else /* CONFIG_BLK_DEV_INTEGRITY */ 128 129 static inline void sd_dif_config_host(struct scsi_disk *disk) 130 { 131 } 132 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 133 { 134 return 0; 135 } 136 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 137 { 138 } 139 140 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 141 142 #endif /* _SCSI_DISK_H */ 143