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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. Petersen5db44862012-09-18 12:19:32 -040017#define SD_WRITE_SAME_TIMEOUT (120 * HZ)
Martin K. Petersene73aec82007-02-27 22:40:55 -050018
19/*
20 * Number of allowed retries
21 */
22#define SD_MAX_RETRIES 5
23#define SD_PASSTHROUGH_RETRIES 1
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -050024#define SD_MAX_MEDIUM_TIMEOUTS 2
Martin K. Petersene73aec82007-02-27 22:40:55 -050025
26/*
27 * Size of the initial data buffer for mode and read capacity data
28 */
29#define SD_BUF_SIZE 512
30
Linus Torvalds18351072008-08-05 21:42:21 -070031/*
32 * Number of sectors at the end of the device to avoid multi-sector
33 * accesses to in the case of last_sector_bug
34 */
35#define SD_LAST_BUGGY_SECTORS 8
36
Martin K. Petersen4e7392e2009-09-20 16:49:38 -040037enum {
38 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
39 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
40};
41
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050042enum {
Martin K. Petersen5db44862012-09-18 12:19:32 -040043 SD_MAX_WS10_BLOCKS = 0xffff,
44 SD_MAX_WS16_BLOCKS = 0x7fffff,
45};
46
47enum {
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050048 SD_LBP_FULL = 0, /* Full logical block provisioning */
49 SD_LBP_UNMAP, /* Use UNMAP command */
50 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
51 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
52 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
53 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
54};
55
Martin K. Petersene73aec82007-02-27 22:40:55 -050056struct scsi_disk {
57 struct scsi_driver *driver; /* always &sd_template */
58 struct scsi_device *device;
Tony Jonesee959b02008-02-22 00:13:36 +010059 struct device dev;
Martin K. Petersene73aec82007-02-27 22:40:55 -050060 struct gendisk *disk;
Arnd Bergmann409f3492010-07-07 16:51:29 +020061 atomic_t openers;
Martin K. Petersene73aec82007-02-27 22:40:55 -050062 sector_t capacity; /* size in 512-byte sectors */
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050063 u32 max_ws_blocks;
64 u32 max_unmap_blocks;
65 u32 unmap_granularity;
66 u32 unmap_alignment;
Martin K. Petersene73aec82007-02-27 22:40:55 -050067 u32 index;
Martin K. Petersen526f7c72010-09-28 14:48:47 -040068 unsigned int physical_block_size;
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -050069 unsigned int max_medium_access_timeouts;
70 unsigned int medium_access_timed_out;
Martin K. Petersene73aec82007-02-27 22:40:55 -050071 u8 media_present;
72 u8 write_prot;
Martin K. Petersene0597d72008-07-17 04:28:34 -040073 u8 protection_type;/* Data Integrity Field */
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050074 u8 provisioning_mode;
Martin K. Petersene0597d72008-07-17 04:28:34 -040075 unsigned ATO : 1; /* state of disk ATO bit */
James Bottomley39c60a02013-04-24 14:02:53 -070076 unsigned cache_override : 1; /* temp override of WCE,RCD */
Martin K. Petersene73aec82007-02-27 22:40:55 -050077 unsigned WCE : 1; /* state of disk WCE bit */
78 unsigned RCD : 1; /* state of disk RCD bit, unused */
79 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
Martin K. Petersen70a9b872009-03-09 11:33:31 -040080 unsigned first_scan : 1;
Martin K. Petersenc98a0eb2011-03-08 02:07:15 -050081 unsigned lbpme : 1;
82 unsigned lbprz : 1;
83 unsigned lbpu : 1;
84 unsigned lbpws : 1;
85 unsigned lbpws10 : 1;
86 unsigned lbpvpd : 1;
Martin K. Petersen5db44862012-09-18 12:19:32 -040087 unsigned ws16 : 1;
Martin K. Petersene73aec82007-02-27 22:40:55 -050088};
Tony Jonesee959b02008-02-22 00:13:36 +010089#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
Martin K. Petersene73aec82007-02-27 22:40:55 -050090
Martin K. Petersen5b635da2008-06-25 11:22:41 -040091static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
92{
93 return container_of(disk->private_data, struct scsi_disk, driver);
94}
95
Martin K. Petersene73aec82007-02-27 22:40:55 -050096#define sd_printk(prefix, sdsk, fmt, a...) \
97 (sdsk)->disk ? \
98 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
99 (sdsk)->disk->disk_name, ##a) : \
100 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
101
Martin K. Petersen18a4d0a2012-02-09 13:48:53 -0500102static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
103{
104 switch (scmd->cmnd[0]) {
105 case READ_6:
106 case READ_10:
107 case READ_12:
108 case READ_16:
109 case SYNCHRONIZE_CACHE:
110 case VERIFY:
111 case VERIFY_12:
112 case VERIFY_16:
113 case WRITE_6:
114 case WRITE_10:
115 case WRITE_12:
116 case WRITE_16:
117 case WRITE_SAME:
118 case WRITE_SAME_16:
119 case UNMAP:
120 return 1;
121 case VARIABLE_LENGTH_CMD:
122 switch (scmd->cmnd[9]) {
123 case READ_32:
124 case VERIFY_32:
125 case WRITE_32:
126 case WRITE_SAME_32:
127 return 1;
128 }
129 }
130
131 return 0;
132}
133
Martin K. Petersene0597d72008-07-17 04:28:34 -0400134/*
135 * A DIF-capable target device can be formatted with different
136 * protection schemes. Currently 0 through 3 are defined:
137 *
138 * Type 0 is regular (unprotected) I/O
139 *
140 * Type 1 defines the contents of the guard and reference tags
141 *
142 * Type 2 defines the contents of the guard and reference tags and
143 * uses 32-byte commands to seed the latter
144 *
145 * Type 3 defines the contents of the guard tag only
146 */
147
148enum sd_dif_target_protection_types {
149 SD_DIF_TYPE0_PROTECTION = 0x0,
150 SD_DIF_TYPE1_PROTECTION = 0x1,
151 SD_DIF_TYPE2_PROTECTION = 0x2,
152 SD_DIF_TYPE3_PROTECTION = 0x3,
153};
154
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400155/*
156 * Data Integrity Field tuple.
157 */
158struct sd_dif_tuple {
159 __be16 guard_tag; /* Checksum */
160 __be16 app_tag; /* Opaque storage */
161 __be32 ref_tag; /* Target LBA or indirect LBA */
162};
163
James Bottomley4c393e62008-10-13 15:20:06 -0400164#ifdef CONFIG_BLK_DEV_INTEGRITY
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400165
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400166extern void sd_dif_config_host(struct scsi_disk *);
Martin K. Petersen8c579ab2012-08-28 14:29:33 -0400167extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400168extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
169
170#else /* CONFIG_BLK_DEV_INTEGRITY */
171
James Bottomley4c393e62008-10-13 15:20:06 -0400172static inline void sd_dif_config_host(struct scsi_disk *disk)
173{
174}
175static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
176{
177 return 0;
178}
179static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
180{
181}
Martin K. Petersenaf55ff62008-07-17 04:28:35 -0400182
183#endif /* CONFIG_BLK_DEV_INTEGRITY */
184
Martin K. Petersene73aec82007-02-27 22:40:55 -0500185#endif /* _SCSI_DISK_H */