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 struct scsi_disk { 47 struct scsi_driver *driver; /* always &sd_template */ 48 struct scsi_device *device; 49 struct device dev; 50 struct gendisk *disk; 51 atomic_t openers; 52 sector_t capacity; /* size in 512-byte sectors */ 53 u32 index; 54 unsigned int physical_block_size; 55 u8 media_present; 56 u8 write_prot; 57 u8 protection_type;/* Data Integrity Field */ 58 unsigned ATO : 1; /* state of disk ATO bit */ 59 unsigned WCE : 1; /* state of disk WCE bit */ 60 unsigned RCD : 1; /* state of disk RCD bit, unused */ 61 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 62 unsigned first_scan : 1; 63 unsigned thin_provisioning : 1; 64 unsigned unmap : 1; 65 unsigned tpws : 1; 66 unsigned tpu : 1; 67 unsigned tpvpd : 1; 68 }; 69 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 70 71 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 72 { 73 return container_of(disk->private_data, struct scsi_disk, driver); 74 } 75 76 #define sd_printk(prefix, sdsk, fmt, a...) \ 77 (sdsk)->disk ? \ 78 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 79 (sdsk)->disk->disk_name, ##a) : \ 80 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 81 82 /* 83 * A DIF-capable target device can be formatted with different 84 * protection schemes. Currently 0 through 3 are defined: 85 * 86 * Type 0 is regular (unprotected) I/O 87 * 88 * Type 1 defines the contents of the guard and reference tags 89 * 90 * Type 2 defines the contents of the guard and reference tags and 91 * uses 32-byte commands to seed the latter 92 * 93 * Type 3 defines the contents of the guard tag only 94 */ 95 96 enum sd_dif_target_protection_types { 97 SD_DIF_TYPE0_PROTECTION = 0x0, 98 SD_DIF_TYPE1_PROTECTION = 0x1, 99 SD_DIF_TYPE2_PROTECTION = 0x2, 100 SD_DIF_TYPE3_PROTECTION = 0x3, 101 }; 102 103 /* 104 * Data Integrity Field tuple. 105 */ 106 struct sd_dif_tuple { 107 __be16 guard_tag; /* Checksum */ 108 __be16 app_tag; /* Opaque storage */ 109 __be32 ref_tag; /* Target LBA or indirect LBA */ 110 }; 111 112 #ifdef CONFIG_BLK_DEV_INTEGRITY 113 114 extern void sd_dif_config_host(struct scsi_disk *); 115 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 116 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 117 118 #else /* CONFIG_BLK_DEV_INTEGRITY */ 119 120 static inline void sd_dif_config_host(struct scsi_disk *disk) 121 { 122 } 123 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 124 { 125 return 0; 126 } 127 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 128 { 129 } 130 131 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 132 133 #endif /* _SCSI_DISK_H */ 134