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 previous_state : 1; 59 unsigned ATO : 1; /* state of disk ATO bit */ 60 unsigned WCE : 1; /* state of disk WCE bit */ 61 unsigned RCD : 1; /* state of disk RCD bit, unused */ 62 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ 63 unsigned first_scan : 1; 64 unsigned thin_provisioning : 1; 65 unsigned unmap : 1; 66 unsigned tpws : 1; 67 unsigned tpu : 1; 68 unsigned tpvpd : 1; 69 }; 70 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 71 72 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 73 { 74 return container_of(disk->private_data, struct scsi_disk, driver); 75 } 76 77 #define sd_printk(prefix, sdsk, fmt, a...) \ 78 (sdsk)->disk ? \ 79 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 80 (sdsk)->disk->disk_name, ##a) : \ 81 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 82 83 /* 84 * A DIF-capable target device can be formatted with different 85 * protection schemes. Currently 0 through 3 are defined: 86 * 87 * Type 0 is regular (unprotected) I/O 88 * 89 * Type 1 defines the contents of the guard and reference tags 90 * 91 * Type 2 defines the contents of the guard and reference tags and 92 * uses 32-byte commands to seed the latter 93 * 94 * Type 3 defines the contents of the guard tag only 95 */ 96 97 enum sd_dif_target_protection_types { 98 SD_DIF_TYPE0_PROTECTION = 0x0, 99 SD_DIF_TYPE1_PROTECTION = 0x1, 100 SD_DIF_TYPE2_PROTECTION = 0x2, 101 SD_DIF_TYPE3_PROTECTION = 0x3, 102 }; 103 104 /* 105 * Data Integrity Field tuple. 106 */ 107 struct sd_dif_tuple { 108 __be16 guard_tag; /* Checksum */ 109 __be16 app_tag; /* Opaque storage */ 110 __be32 ref_tag; /* Target LBA or indirect LBA */ 111 }; 112 113 #ifdef CONFIG_BLK_DEV_INTEGRITY 114 115 extern void sd_dif_config_host(struct scsi_disk *); 116 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 117 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 118 119 #else /* CONFIG_BLK_DEV_INTEGRITY */ 120 121 static inline void sd_dif_config_host(struct scsi_disk *disk) 122 { 123 } 124 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 125 { 126 return 0; 127 } 128 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 129 { 130 } 131 132 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 133 134 #endif /* _SCSI_DISK_H */ 135