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e73aec82 MP |
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 | ||
18351070 LT |
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 | ||
e73aec82 MP |
40 | struct scsi_disk { |
41 | struct scsi_driver *driver; /* always &sd_template */ | |
42 | struct scsi_device *device; | |
ee959b00 | 43 | struct device dev; |
e73aec82 MP |
44 | struct gendisk *disk; |
45 | unsigned int openers; /* protected by BKL for now, yuck */ | |
46 | sector_t capacity; /* size in 512-byte sectors */ | |
47 | u32 index; | |
ea09bcc9 | 48 | unsigned short hw_sector_size; |
e73aec82 MP |
49 | u8 media_present; |
50 | u8 write_prot; | |
e0597d70 | 51 | u8 protection_type;/* Data Integrity Field */ |
285e9670 | 52 | unsigned previous_state : 1; |
e0597d70 | 53 | unsigned ATO : 1; /* state of disk ATO bit */ |
e73aec82 MP |
54 | unsigned WCE : 1; /* state of disk WCE bit */ |
55 | unsigned RCD : 1; /* state of disk RCD bit, unused */ | |
56 | unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ | |
70a9b873 | 57 | unsigned first_scan : 1; |
e73aec82 | 58 | }; |
ee959b00 | 59 | #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
e73aec82 | 60 | |
5b635da1 MP |
61 | static inline struct scsi_disk *scsi_disk(struct gendisk *disk) |
62 | { | |
63 | return container_of(disk->private_data, struct scsi_disk, driver); | |
64 | } | |
65 | ||
e73aec82 MP |
66 | #define sd_printk(prefix, sdsk, fmt, a...) \ |
67 | (sdsk)->disk ? \ | |
68 | sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ | |
69 | (sdsk)->disk->disk_name, ##a) : \ | |
70 | sdev_printk(prefix, (sdsk)->device, fmt, ##a) | |
71 | ||
e0597d70 MP |
72 | /* |
73 | * A DIF-capable target device can be formatted with different | |
74 | * protection schemes. Currently 0 through 3 are defined: | |
75 | * | |
76 | * Type 0 is regular (unprotected) I/O | |
77 | * | |
78 | * Type 1 defines the contents of the guard and reference tags | |
79 | * | |
80 | * Type 2 defines the contents of the guard and reference tags and | |
81 | * uses 32-byte commands to seed the latter | |
82 | * | |
83 | * Type 3 defines the contents of the guard tag only | |
84 | */ | |
85 | ||
86 | enum sd_dif_target_protection_types { | |
87 | SD_DIF_TYPE0_PROTECTION = 0x0, | |
88 | SD_DIF_TYPE1_PROTECTION = 0x1, | |
89 | SD_DIF_TYPE2_PROTECTION = 0x2, | |
90 | SD_DIF_TYPE3_PROTECTION = 0x3, | |
91 | }; | |
92 | ||
af55ff67 MP |
93 | /* |
94 | * Data Integrity Field tuple. | |
95 | */ | |
96 | struct sd_dif_tuple { | |
97 | __be16 guard_tag; /* Checksum */ | |
98 | __be16 app_tag; /* Opaque storage */ | |
99 | __be32 ref_tag; /* Target LBA or indirect LBA */ | |
100 | }; | |
101 | ||
4c393e6e | 102 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
af55ff67 | 103 | |
9e06688e | 104 | extern void sd_dif_op(struct scsi_cmnd *, unsigned int, unsigned int, unsigned int); |
af55ff67 MP |
105 | extern void sd_dif_config_host(struct scsi_disk *); |
106 | extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); | |
107 | extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); | |
108 | ||
109 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
110 | ||
4c393e6e JB |
111 | static inline void sd_dif_op(struct scsi_cmnd *cmd, unsigned int a, unsigned int b, unsigned int c) |
112 | { | |
113 | } | |
114 | static inline void sd_dif_config_host(struct scsi_disk *disk) | |
115 | { | |
116 | } | |
117 | static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) | |
122 | { | |
123 | } | |
af55ff67 MP |
124 | |
125 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
126 | ||
e73aec82 | 127 | #endif /* _SCSI_DISK_H */ |