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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _SCSI_DISK_H
3#define _SCSI_DISK_H
4
5/*
6 * More than enough for everybody ;) The huge number of majors
7 * is a leftover from 16bit dev_t days, we don't really need that
8 * much numberspace.
9 */
10#define SD_MAJORS 16
11
12/*
13 * Time out in seconds for disks and Magneto-opticals (which are slower).
14 */
15#define SD_TIMEOUT (30 * HZ)
16#define SD_MOD_TIMEOUT (75 * HZ)
17/*
18 * Flush timeout is a multiplier over the standard device timeout which is
19 * user modifiable via sysfs but initially set to SD_TIMEOUT
20 */
21#define SD_FLUSH_TIMEOUT_MULTIPLIER 2
22#define SD_WRITE_SAME_TIMEOUT (120 * HZ)
23
24/*
25 * Number of allowed retries
26 */
27#define SD_MAX_RETRIES 5
28#define SD_PASSTHROUGH_RETRIES 1
29#define SD_MAX_MEDIUM_TIMEOUTS 2
30
31/*
32 * Size of the initial data buffer for mode and read capacity data
33 */
34#define SD_BUF_SIZE 512
35
36/*
37 * Number of sectors at the end of the device to avoid multi-sector
38 * accesses to in the case of last_sector_bug
39 */
40#define SD_LAST_BUGGY_SECTORS 8
41
42enum {
43 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
44 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
45};
46
47enum {
48 SD_DEF_XFER_BLOCKS = 0xffff,
49 SD_MAX_XFER_BLOCKS = 0xffffffff,
50 SD_MAX_WS10_BLOCKS = 0xffff,
51 SD_MAX_WS16_BLOCKS = 0x7fffff,
52};
53
54enum {
55 SD_LBP_FULL = 0, /* Full logical block provisioning */
56 SD_LBP_UNMAP, /* Use UNMAP command */
57 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
58 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
59 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
60 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
61};
62
63enum {
64 SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */
65 SD_ZERO_WS, /* Use WRITE SAME(10/16) command */
66 SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */
67 SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */
68};
69
70struct scsi_disk {
71 struct scsi_driver *driver; /* always &sd_template */
72 struct scsi_device *device;
73 struct device dev;
74 struct gendisk *disk;
75 struct opal_dev *opal_dev;
76#ifdef CONFIG_BLK_DEV_ZONED
77 u32 nr_zones;
78 u32 zone_blocks;
79 u32 zones_optimal_open;
80 u32 zones_optimal_nonseq;
81 u32 zones_max_open;
82#endif
83 atomic_t openers;
84 sector_t capacity; /* size in logical blocks */
85 u32 max_xfer_blocks;
86 u32 opt_xfer_blocks;
87 u32 max_ws_blocks;
88 u32 max_unmap_blocks;
89 u32 unmap_granularity;
90 u32 unmap_alignment;
91 u32 index;
92 unsigned int physical_block_size;
93 unsigned int max_medium_access_timeouts;
94 unsigned int medium_access_timed_out;
95 u8 media_present;
96 u8 write_prot;
97 u8 protection_type;/* Data Integrity Field */
98 u8 provisioning_mode;
99 u8 zeroing_mode;
100 unsigned ATO : 1; /* state of disk ATO bit */
101 unsigned cache_override : 1; /* temp override of WCE,RCD */
102 unsigned WCE : 1; /* state of disk WCE bit */
103 unsigned RCD : 1; /* state of disk RCD bit, unused */
104 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
105 unsigned first_scan : 1;
106 unsigned lbpme : 1;
107 unsigned lbprz : 1;
108 unsigned lbpu : 1;
109 unsigned lbpws : 1;
110 unsigned lbpws10 : 1;
111 unsigned lbpvpd : 1;
112 unsigned ws10 : 1;
113 unsigned ws16 : 1;
114 unsigned rc_basis: 2;
115 unsigned zoned: 2;
116 unsigned urswrz : 1;
117 unsigned security : 1;
118 unsigned ignore_medium_access_errors : 1;
119};
120#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
121
122static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
123{
124 return container_of(disk->private_data, struct scsi_disk, driver);
125}
126
127#define sd_printk(prefix, sdsk, fmt, a...) \
128 (sdsk)->disk ? \
129 sdev_prefix_printk(prefix, (sdsk)->device, \
130 (sdsk)->disk->disk_name, fmt, ##a) : \
131 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
132
133#define sd_first_printk(prefix, sdsk, fmt, a...) \
134 do { \
135 if ((sdsk)->first_scan) \
136 sd_printk(prefix, sdsk, fmt, ##a); \
137 } while (0)
138
139static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
140{
141 switch (scmd->cmnd[0]) {
142 case READ_6:
143 case READ_10:
144 case READ_12:
145 case READ_16:
146 case SYNCHRONIZE_CACHE:
147 case VERIFY:
148 case VERIFY_12:
149 case VERIFY_16:
150 case WRITE_6:
151 case WRITE_10:
152 case WRITE_12:
153 case WRITE_16:
154 case WRITE_SAME:
155 case WRITE_SAME_16:
156 case UNMAP:
157 return 1;
158 case VARIABLE_LENGTH_CMD:
159 switch (scmd->cmnd[9]) {
160 case READ_32:
161 case VERIFY_32:
162 case WRITE_32:
163 case WRITE_SAME_32:
164 return 1;
165 }
166 }
167
168 return 0;
169}
170
171static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
172{
173 return blocks << (ilog2(sdev->sector_size) - 9);
174}
175
176static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
177{
178 return blocks * sdev->sector_size;
179}
180
181static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
182{
183 return bytes >> ilog2(sdev->sector_size);
184}
185
186static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
187{
188 return sector >> (ilog2(sdev->sector_size) - 9);
189}
190
191#ifdef CONFIG_BLK_DEV_INTEGRITY
192
193extern void sd_dif_config_host(struct scsi_disk *);
194
195#else /* CONFIG_BLK_DEV_INTEGRITY */
196
197static inline void sd_dif_config_host(struct scsi_disk *disk)
198{
199}
200
201#endif /* CONFIG_BLK_DEV_INTEGRITY */
202
203static inline int sd_is_zoned(struct scsi_disk *sdkp)
204{
205 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
206}
207
208#ifdef CONFIG_BLK_DEV_ZONED
209
210extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
211extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
212extern blk_status_t sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd, bool all);
213extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
214 struct scsi_sense_hdr *sshdr);
215extern int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
216 struct blk_zone *zones, unsigned int *nr_zones);
217
218#else /* CONFIG_BLK_DEV_ZONED */
219
220static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
221 unsigned char *buf)
222{
223 return 0;
224}
225
226static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {}
227
228static inline blk_status_t sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd,
229 bool all)
230{
231 return BLK_STS_TARGET;
232}
233
234static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
235 unsigned int good_bytes,
236 struct scsi_sense_hdr *sshdr) {}
237
238#define sd_zbc_report_zones NULL
239
240#endif /* CONFIG_BLK_DEV_ZONED */
241
242#endif /* _SCSI_DISK_H */