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 23 /* 24 * Number of allowed retries 25 */ 26 #define SD_MAX_RETRIES 5 27 #define SD_PASSTHROUGH_RETRIES 1 28 29 /* 30 * Size of the initial data buffer for mode and read capacity data 31 */ 32 #define SD_BUF_SIZE 512 33 34 /* 35 * Number of sectors at the end of the device to avoid multi-sector 36 * accesses to in the case of last_sector_bug 37 */ 38 #define SD_LAST_BUGGY_SECTORS 8 39 40 enum { 41 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ 42 SD_MEMPOOL_SIZE = 2, /* CDB pool size */ 43 }; 44 45 struct scsi_disk { 46 struct scsi_driver *driver; /* always &sd_template */ 47 struct scsi_device *device; 48 struct device dev; 49 struct gendisk *disk; 50 unsigned int openers; /* protected by BKL for now, yuck */ 51 sector_t capacity; /* size in 512-byte sectors */ 52 u32 index; 53 unsigned short hw_sector_size; 54 u8 media_present; 55 u8 write_prot; 56 u8 protection_type;/* Data Integrity Field */ 57 unsigned previous_state : 1; 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 }; 66 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) 67 68 static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 69 { 70 return container_of(disk->private_data, struct scsi_disk, driver); 71 } 72 73 #define sd_printk(prefix, sdsk, fmt, a...) \ 74 (sdsk)->disk ? \ 75 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ 76 (sdsk)->disk->disk_name, ##a) : \ 77 sdev_printk(prefix, (sdsk)->device, fmt, ##a) 78 79 /* 80 * A DIF-capable target device can be formatted with different 81 * protection schemes. Currently 0 through 3 are defined: 82 * 83 * Type 0 is regular (unprotected) I/O 84 * 85 * Type 1 defines the contents of the guard and reference tags 86 * 87 * Type 2 defines the contents of the guard and reference tags and 88 * uses 32-byte commands to seed the latter 89 * 90 * Type 3 defines the contents of the guard tag only 91 */ 92 93 enum sd_dif_target_protection_types { 94 SD_DIF_TYPE0_PROTECTION = 0x0, 95 SD_DIF_TYPE1_PROTECTION = 0x1, 96 SD_DIF_TYPE2_PROTECTION = 0x2, 97 SD_DIF_TYPE3_PROTECTION = 0x3, 98 }; 99 100 /* 101 * Data Integrity Field tuple. 102 */ 103 struct sd_dif_tuple { 104 __be16 guard_tag; /* Checksum */ 105 __be16 app_tag; /* Opaque storage */ 106 __be32 ref_tag; /* Target LBA or indirect LBA */ 107 }; 108 109 #ifdef CONFIG_BLK_DEV_INTEGRITY 110 111 extern void sd_dif_config_host(struct scsi_disk *); 112 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); 113 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); 114 115 #else /* CONFIG_BLK_DEV_INTEGRITY */ 116 117 static inline void sd_dif_config_host(struct scsi_disk *disk) 118 { 119 } 120 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) 121 { 122 return 0; 123 } 124 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) 125 { 126 } 127 128 #endif /* CONFIG_BLK_DEV_INTEGRITY */ 129 130 #endif /* _SCSI_DISK_H */ 131