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 * This is limited by the naming scheme enforced in sd_probe, 13 * add another character to it if you really need more disks. 14 */ 15 #define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26) 16 17 /* 18 * Time out in seconds for disks and Magneto-opticals (which are slower). 19 */ 20 #define SD_TIMEOUT (30 * HZ) 21 #define SD_MOD_TIMEOUT (75 * HZ) 22 #define SD_FLUSH_TIMEOUT (60 * HZ) 23 24 /* 25 * Number of allowed retries 26 */ 27 #define SD_MAX_RETRIES 5 28 #define SD_PASSTHROUGH_RETRIES 1 29 30 /* 31 * Size of the initial data buffer for mode and read capacity data 32 */ 33 #define SD_BUF_SIZE 512 34 35 /* 36 * Number of sectors at the end of the device to avoid multi-sector 37 * accesses to in the case of last_sector_bug 38 */ 39 #define SD_LAST_BUGGY_SECTORS 8 40 41 enum { 42 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ 43 SD_MEMPOOL_SIZE = 2, /* CDB pool size */ 44 }; 45 46 enum { 47 SD_LBP_FULL = 0, /* Full logical block provisioning */ 48 SD_LBP_UNMAP, /* Use UNMAP command */ 49 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */ 50 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */ 51 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */ 52 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */ 53 }; 54 55 struct scsi_disk { 56 struct scsi_driver *driver; /* always &sd_template */ 57 struct scsi_device *device; 58 struct device dev; 59 struct gendisk *disk; 60 atomic_t openers; 61 sector_t capacity; /* size in 512-byte sectors */ 62 u32 max_ws_blocks; 63 u32 max_unmap_blocks; 64 u32 unmap_granularity; 65 u32 unmap_alignment; 66 u32 index; 67 unsigned int physical_block_size; 68 u8 media_present; 69 u8 write_prot; 70 u8 protection_type;/* Data Integrity Field */ 71 u8 provisioning_mode; 72 unsigned ATO : 1; /* state of disk ATO bit */ 73 unsigned WCE : 1; /* state of disk WCE bit */ 74 unsigned RCD : 1; /* state of disk RCD bit, unused */ 75 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 76 unsigned first_scan : 1; 77 unsigned lbpme : 1; 78 unsigned lbprz : 1; 79 unsigned lbpu : 1; 80 unsigned lbpws : 1; 81 unsigned lbpws10 : 1; 82 unsigned lbpvpd : 1; 83 }; 84 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 85 86 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 87 { 88 return container_of(disk->private_data, struct scsi_disk, driver); 89 } 90 91 #define sd_printk(prefix, sdsk, fmt, a...) \ 92 (sdsk)->disk ? \ 93 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 94 (sdsk)->disk->disk_name, ##a) : \ 95 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 96 97 /* 98 * A DIF-capable target device can be formatted with different 99 * protection schemes. Currently 0 through 3 are defined: 100 * 101 * Type 0 is regular (unprotected) I/O 102 * 103 * Type 1 defines the contents of the guard and reference tags 104 * 105 * Type 2 defines the contents of the guard and reference tags and 106 * uses 32-byte commands to seed the latter 107 * 108 * Type 3 defines the contents of the guard tag only 109 */ 110 111 enum sd_dif_target_protection_types { 112 SD_DIF_TYPE0_PROTECTION = 0x0, 113 SD_DIF_TYPE1_PROTECTION = 0x1, 114 SD_DIF_TYPE2_PROTECTION = 0x2, 115 SD_DIF_TYPE3_PROTECTION = 0x3, 116 }; 117 118 /* 119 * Data Integrity Field tuple. 120 */ 121 struct sd_dif_tuple { 122 __be16 guard_tag; /* Checksum */ 123 __be16 app_tag; /* Opaque storage */ 124 __be32 ref_tag; /* Target LBA or indirect LBA */ 125 }; 126 127 #ifdef CONFIG_BLK_DEV_INTEGRITY 128 129 extern void sd_dif_config_host(struct scsi_disk *); 130 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 131 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 132 133 #else /* CONFIG_BLK_DEV_INTEGRITY */ 134 135 static inline void sd_dif_config_host(struct scsi_disk *disk) 136 { 137 } 138 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 139 { 140 return 0; 141 } 142 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 143 { 144 } 145 146 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 147 148 #endif /* _SCSI_DISK_H */ 149