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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 * 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)
16/*
17 * Flush timeout is a multiplier over the standard device timeout which is
18 * user modifiable via sysfs but initially set to SD_TIMEOUT
19 */
20#define SD_FLUSH_TIMEOUT_MULTIPLIER 2
21#define SD_WRITE_SAME_TIMEOUT (120 * HZ)
22
23/*
24 * Number of allowed retries
25 */
26#define SD_MAX_RETRIES 5
27#define SD_PASSTHROUGH_RETRIES 1
28#define SD_MAX_MEDIUM_TIMEOUTS 2
29
30/*
31 * Size of the initial data buffer for mode and read capacity data
32 */
33#define SD_BUF_SIZE 512
34
35/*
36 * Number of sectors at the end of the device to avoid multi-sector
37 * accesses to in the case of last_sector_bug
38 */
39#define SD_LAST_BUGGY_SECTORS 8
40
41enum {
42 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
43 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
44};
45
46enum {
47 SD_MAX_WS10_BLOCKS = 0xffff,
48 SD_MAX_WS16_BLOCKS = 0x7fffff,
49};
50
51enum {
52 SD_LBP_FULL = 0, /* Full logical block provisioning */
53 SD_LBP_UNMAP, /* Use UNMAP command */
54 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
55 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
56 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
57 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
58};
59
60struct scsi_disk {
61 struct scsi_driver *driver; /* always &sd_template */
62 struct scsi_device *device;
63 struct device dev;
64 struct gendisk *disk;
65 atomic_t openers;
66 sector_t capacity; /* size in 512-byte sectors */
67 u32 max_ws_blocks;
68 u32 max_unmap_blocks;
69 u32 unmap_granularity;
70 u32 unmap_alignment;
71 u32 index;
72 unsigned int physical_block_size;
73 unsigned int max_medium_access_timeouts;
74 unsigned int medium_access_timed_out;
75 u8 media_present;
76 u8 write_prot;
77 u8 protection_type;/* Data Integrity Field */
78 u8 provisioning_mode;
79 unsigned ATO : 1; /* state of disk ATO bit */
80 unsigned cache_override : 1; /* temp override of WCE,RCD */
81 unsigned WCE : 1; /* state of disk WCE bit */
82 unsigned RCD : 1; /* state of disk RCD bit, unused */
83 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
84 unsigned first_scan : 1;
85 unsigned lbpme : 1;
86 unsigned lbprz : 1;
87 unsigned lbpu : 1;
88 unsigned lbpws : 1;
89 unsigned lbpws10 : 1;
90 unsigned lbpvpd : 1;
91 unsigned ws10 : 1;
92 unsigned ws16 : 1;
93};
94#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
95
96static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
97{
98 return container_of(disk->private_data, struct scsi_disk, driver);
99}
100
101#define sd_printk(prefix, sdsk, fmt, a...) \
102 (sdsk)->disk ? \
103 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
104 (sdsk)->disk->disk_name, ##a) : \
105 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
106
107#define sd_first_printk(prefix, sdsk, fmt, a...) \
108 do { \
109 if ((sdkp)->first_scan) \
110 sd_printk(prefix, sdsk, fmt, ##a); \
111 } while (0)
112
113static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
114{
115 switch (scmd->cmnd[0]) {
116 case READ_6:
117 case READ_10:
118 case READ_12:
119 case READ_16:
120 case SYNCHRONIZE_CACHE:
121 case VERIFY:
122 case VERIFY_12:
123 case VERIFY_16:
124 case WRITE_6:
125 case WRITE_10:
126 case WRITE_12:
127 case WRITE_16:
128 case WRITE_SAME:
129 case WRITE_SAME_16:
130 case UNMAP:
131 return 1;
132 case VARIABLE_LENGTH_CMD:
133 switch (scmd->cmnd[9]) {
134 case READ_32:
135 case VERIFY_32:
136 case WRITE_32:
137 case WRITE_SAME_32:
138 return 1;
139 }
140 }
141
142 return 0;
143}
144
145/*
146 * A DIF-capable target device can be formatted with different
147 * protection schemes. Currently 0 through 3 are defined:
148 *
149 * Type 0 is regular (unprotected) I/O
150 *
151 * Type 1 defines the contents of the guard and reference tags
152 *
153 * Type 2 defines the contents of the guard and reference tags and
154 * uses 32-byte commands to seed the latter
155 *
156 * Type 3 defines the contents of the guard tag only
157 */
158
159enum sd_dif_target_protection_types {
160 SD_DIF_TYPE0_PROTECTION = 0x0,
161 SD_DIF_TYPE1_PROTECTION = 0x1,
162 SD_DIF_TYPE2_PROTECTION = 0x2,
163 SD_DIF_TYPE3_PROTECTION = 0x3,
164};
165
166/*
167 * Data Integrity Field tuple.
168 */
169struct sd_dif_tuple {
170 __be16 guard_tag; /* Checksum */
171 __be16 app_tag; /* Opaque storage */
172 __be32 ref_tag; /* Target LBA or indirect LBA */
173};
174
175#ifdef CONFIG_BLK_DEV_INTEGRITY
176
177extern void sd_dif_config_host(struct scsi_disk *);
178extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
179extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
180
181#else /* CONFIG_BLK_DEV_INTEGRITY */
182
183static inline void sd_dif_config_host(struct scsi_disk *disk)
184{
185}
186static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
187{
188 return 0;
189}
190static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
191{
192}
193
194#endif /* CONFIG_BLK_DEV_INTEGRITY */
195
196#endif /* _SCSI_DISK_H */
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 * 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)
16/*
17 * Flush timeout is a multiplier over the standard device timeout which is
18 * user modifiable via sysfs but initially set to SD_TIMEOUT
19 */
20#define SD_FLUSH_TIMEOUT_MULTIPLIER 2
21#define SD_WRITE_SAME_TIMEOUT (120 * HZ)
22
23/*
24 * Number of allowed retries
25 */
26#define SD_MAX_RETRIES 5
27#define SD_PASSTHROUGH_RETRIES 1
28#define SD_MAX_MEDIUM_TIMEOUTS 2
29
30/*
31 * Size of the initial data buffer for mode and read capacity data
32 */
33#define SD_BUF_SIZE 512
34
35/*
36 * Number of sectors at the end of the device to avoid multi-sector
37 * accesses to in the case of last_sector_bug
38 */
39#define SD_LAST_BUGGY_SECTORS 8
40
41enum {
42 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
43 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
44};
45
46enum {
47 SD_DEF_XFER_BLOCKS = 0xffff,
48 SD_MAX_XFER_BLOCKS = 0xffffffff,
49 SD_MAX_WS10_BLOCKS = 0xffff,
50 SD_MAX_WS16_BLOCKS = 0x7fffff,
51};
52
53enum {
54 SD_LBP_FULL = 0, /* Full logical block provisioning */
55 SD_LBP_UNMAP, /* Use UNMAP command */
56 SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
57 SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
58 SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
59 SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
60};
61
62struct scsi_disk {
63 struct scsi_driver *driver; /* always &sd_template */
64 struct scsi_device *device;
65 struct device dev;
66 struct gendisk *disk;
67#ifdef CONFIG_BLK_DEV_ZONED
68 unsigned int nr_zones;
69 unsigned int zone_blocks;
70 unsigned int zone_shift;
71 unsigned long *zones_wlock;
72 unsigned int zones_optimal_open;
73 unsigned int zones_optimal_nonseq;
74 unsigned int zones_max_open;
75#endif
76 atomic_t openers;
77 sector_t capacity; /* size in logical blocks */
78 u32 max_xfer_blocks;
79 u32 opt_xfer_blocks;
80 u32 max_ws_blocks;
81 u32 max_unmap_blocks;
82 u32 unmap_granularity;
83 u32 unmap_alignment;
84 u32 index;
85 unsigned int physical_block_size;
86 unsigned int max_medium_access_timeouts;
87 unsigned int medium_access_timed_out;
88 u8 media_present;
89 u8 write_prot;
90 u8 protection_type;/* Data Integrity Field */
91 u8 provisioning_mode;
92 unsigned ATO : 1; /* state of disk ATO bit */
93 unsigned cache_override : 1; /* temp override of WCE,RCD */
94 unsigned WCE : 1; /* state of disk WCE bit */
95 unsigned RCD : 1; /* state of disk RCD bit, unused */
96 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
97 unsigned first_scan : 1;
98 unsigned lbpme : 1;
99 unsigned lbprz : 1;
100 unsigned lbpu : 1;
101 unsigned lbpws : 1;
102 unsigned lbpws10 : 1;
103 unsigned lbpvpd : 1;
104 unsigned ws10 : 1;
105 unsigned ws16 : 1;
106 unsigned rc_basis: 2;
107 unsigned zoned: 2;
108 unsigned urswrz : 1;
109};
110#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
111
112static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
113{
114 return container_of(disk->private_data, struct scsi_disk, driver);
115}
116
117#define sd_printk(prefix, sdsk, fmt, a...) \
118 (sdsk)->disk ? \
119 sdev_prefix_printk(prefix, (sdsk)->device, \
120 (sdsk)->disk->disk_name, fmt, ##a) : \
121 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
122
123#define sd_first_printk(prefix, sdsk, fmt, a...) \
124 do { \
125 if ((sdkp)->first_scan) \
126 sd_printk(prefix, sdsk, fmt, ##a); \
127 } while (0)
128
129static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
130{
131 switch (scmd->cmnd[0]) {
132 case READ_6:
133 case READ_10:
134 case READ_12:
135 case READ_16:
136 case SYNCHRONIZE_CACHE:
137 case VERIFY:
138 case VERIFY_12:
139 case VERIFY_16:
140 case WRITE_6:
141 case WRITE_10:
142 case WRITE_12:
143 case WRITE_16:
144 case WRITE_SAME:
145 case WRITE_SAME_16:
146 case UNMAP:
147 return 1;
148 case VARIABLE_LENGTH_CMD:
149 switch (scmd->cmnd[9]) {
150 case READ_32:
151 case VERIFY_32:
152 case WRITE_32:
153 case WRITE_SAME_32:
154 return 1;
155 }
156 }
157
158 return 0;
159}
160
161static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
162{
163 return blocks << (ilog2(sdev->sector_size) - 9);
164}
165
166static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
167{
168 return blocks * sdev->sector_size;
169}
170
171static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
172{
173 return sector >> (ilog2(sdev->sector_size) - 9);
174}
175
176/*
177 * Look up the DIX operation based on whether the command is read or
178 * write and whether dix and dif are enabled.
179 */
180static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
181{
182 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
183 const unsigned int ops[] = { /* wrt dix dif */
184 SCSI_PROT_NORMAL, /* 0 0 0 */
185 SCSI_PROT_READ_STRIP, /* 0 0 1 */
186 SCSI_PROT_READ_INSERT, /* 0 1 0 */
187 SCSI_PROT_READ_PASS, /* 0 1 1 */
188 SCSI_PROT_NORMAL, /* 1 0 0 */
189 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
190 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
191 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
192 };
193
194 return ops[write << 2 | dix << 1 | dif];
195}
196
197/*
198 * Returns a mask of the protection flags that are valid for a given DIX
199 * operation.
200 */
201static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
202{
203 const unsigned int flag_mask[] = {
204 [SCSI_PROT_NORMAL] = 0,
205
206 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
207 SCSI_PROT_GUARD_CHECK |
208 SCSI_PROT_REF_CHECK |
209 SCSI_PROT_REF_INCREMENT,
210
211 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
212 SCSI_PROT_IP_CHECKSUM,
213
214 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
215 SCSI_PROT_GUARD_CHECK |
216 SCSI_PROT_REF_CHECK |
217 SCSI_PROT_REF_INCREMENT |
218 SCSI_PROT_IP_CHECKSUM,
219
220 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
221 SCSI_PROT_REF_INCREMENT,
222
223 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
224 SCSI_PROT_REF_CHECK |
225 SCSI_PROT_REF_INCREMENT |
226 SCSI_PROT_IP_CHECKSUM,
227
228 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
229 SCSI_PROT_GUARD_CHECK |
230 SCSI_PROT_REF_CHECK |
231 SCSI_PROT_REF_INCREMENT |
232 SCSI_PROT_IP_CHECKSUM,
233 };
234
235 return flag_mask[prot_op];
236}
237
238#ifdef CONFIG_BLK_DEV_INTEGRITY
239
240extern void sd_dif_config_host(struct scsi_disk *);
241extern void sd_dif_prepare(struct scsi_cmnd *scmd);
242extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
243
244#else /* CONFIG_BLK_DEV_INTEGRITY */
245
246static inline void sd_dif_config_host(struct scsi_disk *disk)
247{
248}
249static inline int sd_dif_prepare(struct scsi_cmnd *scmd)
250{
251 return 0;
252}
253static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
254{
255}
256
257#endif /* CONFIG_BLK_DEV_INTEGRITY */
258
259static inline int sd_is_zoned(struct scsi_disk *sdkp)
260{
261 return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
262}
263
264#ifdef CONFIG_BLK_DEV_ZONED
265
266extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
267extern void sd_zbc_remove(struct scsi_disk *sdkp);
268extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
269extern int sd_zbc_setup_write_cmnd(struct scsi_cmnd *cmd);
270extern void sd_zbc_cancel_write_cmnd(struct scsi_cmnd *cmd);
271extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd);
272extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd);
273extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
274 struct scsi_sense_hdr *sshdr);
275
276#else /* CONFIG_BLK_DEV_ZONED */
277
278static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
279 unsigned char *buf)
280{
281 return 0;
282}
283
284static inline void sd_zbc_remove(struct scsi_disk *sdkp) {}
285
286static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {}
287
288static inline int sd_zbc_setup_write_cmnd(struct scsi_cmnd *cmd)
289{
290 /* Let the drive fail requests */
291 return BLKPREP_OK;
292}
293
294static inline void sd_zbc_cancel_write_cmnd(struct scsi_cmnd *cmd) {}
295
296static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
297{
298 return BLKPREP_INVALID;
299}
300
301static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd)
302{
303 return BLKPREP_INVALID;
304}
305
306static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
307 unsigned int good_bytes,
308 struct scsi_sense_hdr *sshdr) {}
309
310#endif /* CONFIG_BLK_DEV_ZONED */
311
312#endif /* _SCSI_DISK_H */