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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 | ||
34 | struct scsi_disk { | |
35 | struct scsi_driver *driver; /* always &sd_template */ | |
36 | struct scsi_device *device; | |
ee959b00 | 37 | struct device dev; |
e73aec82 MP |
38 | struct gendisk *disk; |
39 | unsigned int openers; /* protected by BKL for now, yuck */ | |
40 | sector_t capacity; /* size in 512-byte sectors */ | |
41 | u32 index; | |
42 | u8 media_present; | |
43 | u8 write_prot; | |
e0597d70 | 44 | u8 protection_type;/* Data Integrity Field */ |
285e9670 | 45 | unsigned previous_state : 1; |
e0597d70 | 46 | unsigned ATO : 1; /* state of disk ATO bit */ |
e73aec82 MP |
47 | unsigned WCE : 1; /* state of disk WCE bit */ |
48 | unsigned RCD : 1; /* state of disk RCD bit, unused */ | |
49 | unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ | |
50 | }; | |
ee959b00 | 51 | #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
e73aec82 | 52 | |
5b635da1 MP |
53 | static inline struct scsi_disk *scsi_disk(struct gendisk *disk) |
54 | { | |
55 | return container_of(disk->private_data, struct scsi_disk, driver); | |
56 | } | |
57 | ||
e73aec82 MP |
58 | #define sd_printk(prefix, sdsk, fmt, a...) \ |
59 | (sdsk)->disk ? \ | |
60 | sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ | |
61 | (sdsk)->disk->disk_name, ##a) : \ | |
62 | sdev_printk(prefix, (sdsk)->device, fmt, ##a) | |
63 | ||
e0597d70 MP |
64 | /* |
65 | * A DIF-capable target device can be formatted with different | |
66 | * protection schemes. Currently 0 through 3 are defined: | |
67 | * | |
68 | * Type 0 is regular (unprotected) I/O | |
69 | * | |
70 | * Type 1 defines the contents of the guard and reference tags | |
71 | * | |
72 | * Type 2 defines the contents of the guard and reference tags and | |
73 | * uses 32-byte commands to seed the latter | |
74 | * | |
75 | * Type 3 defines the contents of the guard tag only | |
76 | */ | |
77 | ||
78 | enum sd_dif_target_protection_types { | |
79 | SD_DIF_TYPE0_PROTECTION = 0x0, | |
80 | SD_DIF_TYPE1_PROTECTION = 0x1, | |
81 | SD_DIF_TYPE2_PROTECTION = 0x2, | |
82 | SD_DIF_TYPE3_PROTECTION = 0x3, | |
83 | }; | |
84 | ||
af55ff67 MP |
85 | /* |
86 | * Data Integrity Field tuple. | |
87 | */ | |
88 | struct sd_dif_tuple { | |
89 | __be16 guard_tag; /* Checksum */ | |
90 | __be16 app_tag; /* Opaque storage */ | |
91 | __be32 ref_tag; /* Target LBA or indirect LBA */ | |
92 | }; | |
93 | ||
94 | #if defined(CONFIG_BLK_DEV_INTEGRITY) | |
95 | ||
96 | extern void sd_dif_op(struct scsi_cmnd *, unsigned int, unsigned int); | |
97 | extern void sd_dif_config_host(struct scsi_disk *); | |
98 | extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); | |
99 | extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); | |
100 | ||
101 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
102 | ||
103 | #define sd_dif_op(a, b, c) do { } while (0) | |
104 | #define sd_dif_config_host(a) do { } while (0) | |
105 | #define sd_dif_prepare(a, b, c) (0) | |
106 | #define sd_dif_complete(a, b) (0) | |
107 | ||
108 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
109 | ||
e73aec82 | 110 | #endif /* _SCSI_DISK_H */ |