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Martin K. Petersene73aec82007-02-27 22:40:55 -05001#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/*
Martin K. Petersene73aec82007-02-27 22:40:55 -050012 * 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)
Mike Christiee3b3e622010-08-11 11:06:25 -050016#define SD_FLUSH_TIMEOUT (60 * HZ)
Martin K. Petersene73aec82007-02-27 22:40:55 -050017
18/*
19 * Number of allowed retries
20 */
21#define SD_MAX_RETRIES 5
22#define SD_PASSTHROUGH_RETRIES 1
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -050023#define SD_MAX_MEDIUM_TIMEOUTS 2
Martin K. Petersene73aec82007-02-27 22:40:55 -050024
25/*
26 * Size of the initial data buffer for mode and read capacity data
27 */
28#define SD_BUF_SIZE 512
29
Linus Torvalds18351072008-08-05 21:42:21 -070030/*
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
Martin K. Petersen4e7392e2009-09-20 16:49:38 -040036enum {
37 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
38 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
39};
40
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050041enum {
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
Martin K. Petersene73aec82007-02-27 22:40:55 -050050struct scsi_disk {
51 struct scsi_driver *driver; /* always &sd_template */
52 struct scsi_device *device;
Tony Jonesee959b02008-02-22 00:13:36 +010053 struct device dev;
Martin K. Petersene73aec82007-02-27 22:40:55 -050054 struct gendisk *disk;
Arnd Bergmann409f3492010-07-07 16:51:29 +020055 atomic_t openers;
Martin K. Petersene73aec82007-02-27 22:40:55 -050056 sector_t capacity; /* size in 512-byte sectors */
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050057 u32 max_ws_blocks;
58 u32 max_unmap_blocks;
59 u32 unmap_granularity;
60 u32 unmap_alignment;
Martin K. Petersene73aec82007-02-27 22:40:55 -050061 u32 index;
Martin K. Petersen526f7c72010-09-28 14:48:47 -040062 unsigned int physical_block_size;
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -050063 unsigned int max_medium_access_timeouts;
64 unsigned int medium_access_timed_out;
Martin K. Petersene73aec82007-02-27 22:40:55 -050065 u8 media_present;
66 u8 write_prot;
Martin K. Petersene0597d72008-07-17 04:28:34 -040067 u8 protection_type;/* Data Integrity Field */
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050068 u8 provisioning_mode;
Martin K. Petersene0597d72008-07-17 04:28:34 -040069 unsigned ATO : 1; /* state of disk ATO bit */
Martin K. Petersene73aec82007-02-27 22:40:55 -050070 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 */
Martin K. Petersen70a9b872009-03-09 11:33:31 -040073 unsigned first_scan : 1;
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050074 unsigned lbpme : 1;
75 unsigned lbprz : 1;
76 unsigned lbpu : 1;
77 unsigned lbpws : 1;
78 unsigned lbpws10 : 1;
79 unsigned lbpvpd : 1;
Martin K. Petersene73aec82007-02-27 22:40:55 -050080};
Tony Jonesee959b02008-02-22 00:13:36 +010081#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
Martin K. Petersene73aec82007-02-27 22:40:55 -050082
Martin K. Petersen5b635da2008-06-25 11:22:41 -040083static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
84{
85 return container_of(disk->private_data, struct scsi_disk, driver);
86}
87
Martin K. Petersene73aec82007-02-27 22:40:55 -050088#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
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -050094static 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
Martin K. Petersene0597d72008-07-17 04:28:34 -0400126/*
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
140enum 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
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400147/*
148 * Data Integrity Field tuple.
149 */
150struct 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
James Bottomley4c393e62008-10-13 15:20:06 -0400156#ifdef CONFIG_BLK_DEV_INTEGRITY
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400157
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400158extern void sd_dif_config_host(struct scsi_disk *);
159extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int);
160extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
161
162#else /* CONFIG_BLK_DEV_INTEGRITY */
163
James Bottomley4c393e62008-10-13 15:20:06 -0400164static inline void sd_dif_config_host(struct scsi_disk *disk)
165{
166}
167static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
168{
169 return 0;
170}
171static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
172{
173}
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400174
175#endif /* CONFIG_BLK_DEV_INTEGRITY */
176
Martin K. Petersene73aec82007-02-27 22:40:55 -0500177#endif /* _SCSI_DISK_H */