Commit | Line | Data |
---|---|---|
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 | ||
e73aec82 MP |
11 | /* |
12 | * Time out in seconds for disks and Magneto-opticals (which are slower). | |
13 | */ | |
14 | #define SD_TIMEOUT (30 * HZ) | |
15 | #define SD_MOD_TIMEOUT (75 * HZ) | |
e3b3e624 | 16 | #define SD_FLUSH_TIMEOUT (60 * HZ) |
e73aec82 MP |
17 | |
18 | /* | |
19 | * Number of allowed retries | |
20 | */ | |
21 | #define SD_MAX_RETRIES 5 | |
22 | #define SD_PASSTHROUGH_RETRIES 1 | |
18a4d0a2 | 23 | #define SD_MAX_MEDIUM_TIMEOUTS 2 |
e73aec82 MP |
24 | |
25 | /* | |
26 | * Size of the initial data buffer for mode and read capacity data | |
27 | */ | |
28 | #define SD_BUF_SIZE 512 | |
29 | ||
18351070 LT |
30 | /* |
31 | * Number of sectors at the end of the device to avoid multi-sector | |
32 | * accesses to in the case of last_sector_bug | |
33 | */ | |
34 | #define SD_LAST_BUGGY_SECTORS 8 | |
35 | ||
4e7392ec MP |
36 | enum { |
37 | SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ | |
38 | SD_MEMPOOL_SIZE = 2, /* CDB pool size */ | |
39 | }; | |
40 | ||
c98a0eb0 MP |
41 | enum { |
42 | SD_LBP_FULL = 0, /* Full logical block provisioning */ | |
43 | SD_LBP_UNMAP, /* Use UNMAP command */ | |
44 | SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */ | |
45 | SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */ | |
46 | SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */ | |
47 | SD_LBP_DISABLE, /* Discard disabled due to failed cmd */ | |
48 | }; | |
49 | ||
e73aec82 MP |
50 | struct scsi_disk { |
51 | struct scsi_driver *driver; /* always &sd_template */ | |
52 | struct scsi_device *device; | |
ee959b00 | 53 | struct device dev; |
e73aec82 | 54 | struct gendisk *disk; |
409f3499 | 55 | atomic_t openers; |
e73aec82 | 56 | sector_t capacity; /* size in 512-byte sectors */ |
c98a0eb0 MP |
57 | u32 max_ws_blocks; |
58 | u32 max_unmap_blocks; | |
59 | u32 unmap_granularity; | |
60 | u32 unmap_alignment; | |
e73aec82 | 61 | u32 index; |
526f7c79 | 62 | unsigned int physical_block_size; |
18a4d0a2 MP |
63 | unsigned int max_medium_access_timeouts; |
64 | unsigned int medium_access_timed_out; | |
e73aec82 MP |
65 | u8 media_present; |
66 | u8 write_prot; | |
e0597d70 | 67 | u8 protection_type;/* Data Integrity Field */ |
c98a0eb0 | 68 | u8 provisioning_mode; |
e0597d70 | 69 | unsigned ATO : 1; /* state of disk ATO bit */ |
e73aec82 MP |
70 | unsigned WCE : 1; /* state of disk WCE bit */ |
71 | unsigned RCD : 1; /* state of disk RCD bit, unused */ | |
72 | unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ | |
70a9b873 | 73 | unsigned first_scan : 1; |
c98a0eb0 MP |
74 | unsigned lbpme : 1; |
75 | unsigned lbprz : 1; | |
76 | unsigned lbpu : 1; | |
77 | unsigned lbpws : 1; | |
78 | unsigned lbpws10 : 1; | |
79 | unsigned lbpvpd : 1; | |
e73aec82 | 80 | }; |
ee959b00 | 81 | #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
e73aec82 | 82 | |
5b635da1 MP |
83 | static inline struct scsi_disk *scsi_disk(struct gendisk *disk) |
84 | { | |
85 | return container_of(disk->private_data, struct scsi_disk, driver); | |
86 | } | |
87 | ||
e73aec82 MP |
88 | #define sd_printk(prefix, sdsk, fmt, a...) \ |
89 | (sdsk)->disk ? \ | |
90 | sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ | |
91 | (sdsk)->disk->disk_name, ##a) : \ | |
92 | sdev_printk(prefix, (sdsk)->device, fmt, ##a) | |
93 | ||
18a4d0a2 MP |
94 | static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) |
95 | { | |
96 | switch (scmd->cmnd[0]) { | |
97 | case READ_6: | |
98 | case READ_10: | |
99 | case READ_12: | |
100 | case READ_16: | |
101 | case SYNCHRONIZE_CACHE: | |
102 | case VERIFY: | |
103 | case VERIFY_12: | |
104 | case VERIFY_16: | |
105 | case WRITE_6: | |
106 | case WRITE_10: | |
107 | case WRITE_12: | |
108 | case WRITE_16: | |
109 | case WRITE_SAME: | |
110 | case WRITE_SAME_16: | |
111 | case UNMAP: | |
112 | return 1; | |
113 | case VARIABLE_LENGTH_CMD: | |
114 | switch (scmd->cmnd[9]) { | |
115 | case READ_32: | |
116 | case VERIFY_32: | |
117 | case WRITE_32: | |
118 | case WRITE_SAME_32: | |
119 | return 1; | |
120 | } | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
e0597d70 MP |
126 | /* |
127 | * A DIF-capable target device can be formatted with different | |
128 | * protection schemes. Currently 0 through 3 are defined: | |
129 | * | |
130 | * Type 0 is regular (unprotected) I/O | |
131 | * | |
132 | * Type 1 defines the contents of the guard and reference tags | |
133 | * | |
134 | * Type 2 defines the contents of the guard and reference tags and | |
135 | * uses 32-byte commands to seed the latter | |
136 | * | |
137 | * Type 3 defines the contents of the guard tag only | |
138 | */ | |
139 | ||
140 | enum sd_dif_target_protection_types { | |
141 | SD_DIF_TYPE0_PROTECTION = 0x0, | |
142 | SD_DIF_TYPE1_PROTECTION = 0x1, | |
143 | SD_DIF_TYPE2_PROTECTION = 0x2, | |
144 | SD_DIF_TYPE3_PROTECTION = 0x3, | |
145 | }; | |
146 | ||
af55ff67 MP |
147 | /* |
148 | * Data Integrity Field tuple. | |
149 | */ | |
150 | struct sd_dif_tuple { | |
151 | __be16 guard_tag; /* Checksum */ | |
152 | __be16 app_tag; /* Opaque storage */ | |
153 | __be32 ref_tag; /* Target LBA or indirect LBA */ | |
154 | }; | |
155 | ||
4c393e6e | 156 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
af55ff67 | 157 | |
af55ff67 MP |
158 | extern void sd_dif_config_host(struct scsi_disk *); |
159 | extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int); | |
160 | extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); | |
161 | ||
162 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
163 | ||
4c393e6e JB |
164 | static inline void sd_dif_config_host(struct scsi_disk *disk) |
165 | { | |
166 | } | |
167 | static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a) | |
168 | { | |
169 | return 0; | |
170 | } | |
171 | static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) | |
172 | { | |
173 | } | |
af55ff67 MP |
174 | |
175 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
176 | ||
e73aec82 | 177 | #endif /* _SCSI_DISK_H */ |