Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 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 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 40 | enum { |
| 41 | SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ |
| 42 | SD_MEMPOOL_SIZE = 2, /* CDB pool size */ |
| 43 | }; |
| 44 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 45 | struct scsi_disk { |
| 46 | struct scsi_driver *driver; /* always &sd_template */ |
| 47 | struct scsi_device *device; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 48 | struct device dev; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 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; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 53 | unsigned short hw_sector_size; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 54 | u8 media_present; |
| 55 | u8 write_prot; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 56 | u8 protection_type;/* Data Integrity Field */ |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 57 | unsigned previous_state : 1; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 58 | unsigned ATO : 1; /* state of disk ATO bit */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 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 */ |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 62 | unsigned first_scan : 1; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 63 | }; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 64 | #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 65 | |
Martin K. Petersen | 5b635da | 2008-06-25 11:22:41 -0400 | [diff] [blame] | 66 | static inline struct scsi_disk *scsi_disk(struct gendisk *disk) |
| 67 | { |
| 68 | return container_of(disk->private_data, struct scsi_disk, driver); |
| 69 | } |
| 70 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 71 | #define sd_printk(prefix, sdsk, fmt, a...) \ |
| 72 | (sdsk)->disk ? \ |
| 73 | sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ |
| 74 | (sdsk)->disk->disk_name, ##a) : \ |
| 75 | sdev_printk(prefix, (sdsk)->device, fmt, ##a) |
| 76 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 77 | /* |
| 78 | * A DIF-capable target device can be formatted with different |
| 79 | * protection schemes. Currently 0 through 3 are defined: |
| 80 | * |
| 81 | * Type 0 is regular (unprotected) I/O |
| 82 | * |
| 83 | * Type 1 defines the contents of the guard and reference tags |
| 84 | * |
| 85 | * Type 2 defines the contents of the guard and reference tags and |
| 86 | * uses 32-byte commands to seed the latter |
| 87 | * |
| 88 | * Type 3 defines the contents of the guard tag only |
| 89 | */ |
| 90 | |
| 91 | enum sd_dif_target_protection_types { |
| 92 | SD_DIF_TYPE0_PROTECTION = 0x0, |
| 93 | SD_DIF_TYPE1_PROTECTION = 0x1, |
| 94 | SD_DIF_TYPE2_PROTECTION = 0x2, |
| 95 | SD_DIF_TYPE3_PROTECTION = 0x3, |
| 96 | }; |
| 97 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 98 | /* |
| 99 | * Data Integrity Field tuple. |
| 100 | */ |
| 101 | struct sd_dif_tuple { |
| 102 | __be16 guard_tag; /* Checksum */ |
| 103 | __be16 app_tag; /* Opaque storage */ |
| 104 | __be32 ref_tag; /* Target LBA or indirect LBA */ |
| 105 | }; |
| 106 | |
James Bottomley | 4c393e6 | 2008-10-13 15:20:06 -0400 | [diff] [blame] | 107 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 108 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 109 | extern void sd_dif_config_host(struct scsi_disk *); |
| 110 | extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); |
| 111 | extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); |
| 112 | |
| 113 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
| 114 | |
James Bottomley | 4c393e6 | 2008-10-13 15:20:06 -0400 | [diff] [blame] | 115 | static inline void sd_dif_config_host(struct scsi_disk *disk) |
| 116 | { |
| 117 | } |
| 118 | static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) |
| 119 | { |
| 120 | return 0; |
| 121 | } |
| 122 | static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) |
| 123 | { |
| 124 | } |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 125 | |
| 126 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
| 127 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 128 | #endif /* _SCSI_DISK_H */ |