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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) | |
7e660100 JB |
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 | |
5db44863 | 21 | #define SD_WRITE_SAME_TIMEOUT (120 * HZ) |
e73aec82 MP |
22 | |
23 | /* | |
24 | * Number of allowed retries | |
25 | */ | |
26 | #define SD_MAX_RETRIES 5 | |
27 | #define SD_PASSTHROUGH_RETRIES 1 | |
18a4d0a2 | 28 | #define SD_MAX_MEDIUM_TIMEOUTS 2 |
e73aec82 MP |
29 | |
30 | /* | |
31 | * Size of the initial data buffer for mode and read capacity data | |
32 | */ | |
33 | #define SD_BUF_SIZE 512 | |
34 | ||
18351070 LT |
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 | ||
4e7392ec MP |
41 | enum { |
42 | SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ | |
43 | SD_MEMPOOL_SIZE = 2, /* CDB pool size */ | |
44 | }; | |
45 | ||
5db44863 | 46 | enum { |
bcdb247c MP |
47 | SD_DEF_XFER_BLOCKS = 0xffff, |
48 | SD_MAX_XFER_BLOCKS = 0xffffffff, | |
5db44863 MP |
49 | SD_MAX_WS10_BLOCKS = 0xffff, |
50 | SD_MAX_WS16_BLOCKS = 0x7fffff, | |
51 | }; | |
52 | ||
c98a0eb0 MP |
53 | enum { |
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 | ||
e6bd9312 MP |
62 | enum { |
63 | SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */ | |
64 | SD_ZERO_WS, /* Use WRITE SAME(10/16) command */ | |
65 | SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */ | |
66 | SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */ | |
67 | }; | |
68 | ||
e73aec82 MP |
69 | struct scsi_disk { |
70 | struct scsi_driver *driver; /* always &sd_template */ | |
71 | struct scsi_device *device; | |
ee959b00 | 72 | struct device dev; |
e73aec82 | 73 | struct gendisk *disk; |
89d94756 HR |
74 | #ifdef CONFIG_BLK_DEV_ZONED |
75 | unsigned int nr_zones; | |
76 | unsigned int zone_blocks; | |
77 | unsigned int zone_shift; | |
78 | unsigned long *zones_wlock; | |
79 | unsigned int zones_optimal_open; | |
80 | unsigned int zones_optimal_nonseq; | |
81 | unsigned int zones_max_open; | |
82 | #endif | |
409f3499 | 83 | atomic_t openers; |
f08bb1e0 | 84 | sector_t capacity; /* size in logical blocks */ |
bcdb247c | 85 | u32 max_xfer_blocks; |
ca369d51 | 86 | u32 opt_xfer_blocks; |
c98a0eb0 MP |
87 | u32 max_ws_blocks; |
88 | u32 max_unmap_blocks; | |
89 | u32 unmap_granularity; | |
90 | u32 unmap_alignment; | |
e73aec82 | 91 | u32 index; |
526f7c79 | 92 | unsigned int physical_block_size; |
18a4d0a2 MP |
93 | unsigned int max_medium_access_timeouts; |
94 | unsigned int medium_access_timed_out; | |
e73aec82 MP |
95 | u8 media_present; |
96 | u8 write_prot; | |
e0597d70 | 97 | u8 protection_type;/* Data Integrity Field */ |
c98a0eb0 | 98 | u8 provisioning_mode; |
e6bd9312 | 99 | u8 zeroing_mode; |
e0597d70 | 100 | unsigned ATO : 1; /* state of disk ATO bit */ |
39c60a09 | 101 | unsigned cache_override : 1; /* temp override of WCE,RCD */ |
e73aec82 MP |
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 */ | |
70a9b873 | 105 | unsigned first_scan : 1; |
c98a0eb0 MP |
106 | unsigned lbpme : 1; |
107 | unsigned lbprz : 1; | |
108 | unsigned lbpu : 1; | |
109 | unsigned lbpws : 1; | |
110 | unsigned lbpws10 : 1; | |
111 | unsigned lbpvpd : 1; | |
66c28f97 | 112 | unsigned ws10 : 1; |
5db44863 | 113 | unsigned ws16 : 1; |
89d94756 HR |
114 | unsigned rc_basis: 2; |
115 | unsigned zoned: 2; | |
116 | unsigned urswrz : 1; | |
7a38dc0b | 117 | unsigned ignore_medium_access_errors : 1; |
e73aec82 | 118 | }; |
ee959b00 | 119 | #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
e73aec82 | 120 | |
5b635da1 MP |
121 | static inline struct scsi_disk *scsi_disk(struct gendisk *disk) |
122 | { | |
123 | return container_of(disk->private_data, struct scsi_disk, driver); | |
124 | } | |
125 | ||
e73aec82 MP |
126 | #define sd_printk(prefix, sdsk, fmt, a...) \ |
127 | (sdsk)->disk ? \ | |
22e0d994 HR |
128 | sdev_prefix_printk(prefix, (sdsk)->device, \ |
129 | (sdsk)->disk->disk_name, fmt, ##a) : \ | |
130 | sdev_printk(prefix, (sdsk)->device, fmt, ##a) | |
e73aec82 | 131 | |
b2bff6ce MP |
132 | #define sd_first_printk(prefix, sdsk, fmt, a...) \ |
133 | do { \ | |
134 | if ((sdkp)->first_scan) \ | |
135 | sd_printk(prefix, sdsk, fmt, ##a); \ | |
136 | } while (0) | |
137 | ||
18a4d0a2 MP |
138 | static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) |
139 | { | |
140 | switch (scmd->cmnd[0]) { | |
141 | case READ_6: | |
142 | case READ_10: | |
143 | case READ_12: | |
144 | case READ_16: | |
145 | case SYNCHRONIZE_CACHE: | |
146 | case VERIFY: | |
147 | case VERIFY_12: | |
148 | case VERIFY_16: | |
149 | case WRITE_6: | |
150 | case WRITE_10: | |
151 | case WRITE_12: | |
152 | case WRITE_16: | |
153 | case WRITE_SAME: | |
154 | case WRITE_SAME_16: | |
155 | case UNMAP: | |
156 | return 1; | |
157 | case VARIABLE_LENGTH_CMD: | |
158 | switch (scmd->cmnd[9]) { | |
159 | case READ_32: | |
160 | case VERIFY_32: | |
161 | case WRITE_32: | |
162 | case WRITE_SAME_32: | |
163 | return 1; | |
164 | } | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
f08bb1e0 MP |
170 | static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks) |
171 | { | |
172 | return blocks << (ilog2(sdev->sector_size) - 9); | |
173 | } | |
174 | ||
6b7e9cde MP |
175 | static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) |
176 | { | |
177 | return blocks * sdev->sector_size; | |
178 | } | |
179 | ||
6eadc612 DLM |
180 | static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes) |
181 | { | |
182 | return bytes >> ilog2(sdev->sector_size); | |
183 | } | |
184 | ||
89d94756 HR |
185 | static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector) |
186 | { | |
187 | return sector >> (ilog2(sdev->sector_size) - 9); | |
188 | } | |
189 | ||
c611529e MP |
190 | /* |
191 | * Look up the DIX operation based on whether the command is read or | |
192 | * write and whether dix and dif are enabled. | |
193 | */ | |
194 | static inline unsigned int sd_prot_op(bool write, bool dix, bool dif) | |
195 | { | |
196 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ | |
197 | const unsigned int ops[] = { /* wrt dix dif */ | |
198 | SCSI_PROT_NORMAL, /* 0 0 0 */ | |
199 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ | |
200 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ | |
201 | SCSI_PROT_READ_PASS, /* 0 1 1 */ | |
202 | SCSI_PROT_NORMAL, /* 1 0 0 */ | |
203 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ | |
204 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ | |
205 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ | |
206 | }; | |
207 | ||
208 | return ops[write << 2 | dix << 1 | dif]; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Returns a mask of the protection flags that are valid for a given DIX | |
213 | * operation. | |
214 | */ | |
215 | static inline unsigned int sd_prot_flag_mask(unsigned int prot_op) | |
216 | { | |
217 | const unsigned int flag_mask[] = { | |
218 | [SCSI_PROT_NORMAL] = 0, | |
219 | ||
220 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | | |
221 | SCSI_PROT_GUARD_CHECK | | |
222 | SCSI_PROT_REF_CHECK | | |
223 | SCSI_PROT_REF_INCREMENT, | |
224 | ||
225 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | | |
226 | SCSI_PROT_IP_CHECKSUM, | |
227 | ||
228 | [SCSI_PROT_READ_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 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | | |
235 | SCSI_PROT_REF_INCREMENT, | |
236 | ||
237 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | | |
238 | SCSI_PROT_REF_CHECK | | |
239 | SCSI_PROT_REF_INCREMENT | | |
240 | SCSI_PROT_IP_CHECKSUM, | |
241 | ||
242 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | | |
243 | SCSI_PROT_GUARD_CHECK | | |
244 | SCSI_PROT_REF_CHECK | | |
245 | SCSI_PROT_REF_INCREMENT | | |
246 | SCSI_PROT_IP_CHECKSUM, | |
247 | }; | |
248 | ||
249 | return flag_mask[prot_op]; | |
250 | } | |
251 | ||
4c393e6e | 252 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
af55ff67 | 253 | |
af55ff67 | 254 | extern void sd_dif_config_host(struct scsi_disk *); |
c611529e | 255 | extern void sd_dif_prepare(struct scsi_cmnd *scmd); |
af55ff67 MP |
256 | extern void sd_dif_complete(struct scsi_cmnd *, unsigned int); |
257 | ||
258 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
259 | ||
4c393e6e JB |
260 | static inline void sd_dif_config_host(struct scsi_disk *disk) |
261 | { | |
262 | } | |
c611529e | 263 | static inline int sd_dif_prepare(struct scsi_cmnd *scmd) |
4c393e6e JB |
264 | { |
265 | return 0; | |
266 | } | |
267 | static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a) | |
268 | { | |
269 | } | |
af55ff67 MP |
270 | |
271 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
272 | ||
89d94756 HR |
273 | static inline int sd_is_zoned(struct scsi_disk *sdkp) |
274 | { | |
275 | return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC; | |
276 | } | |
277 | ||
278 | #ifdef CONFIG_BLK_DEV_ZONED | |
279 | ||
280 | extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); | |
281 | extern void sd_zbc_remove(struct scsi_disk *sdkp); | |
282 | extern void sd_zbc_print_zones(struct scsi_disk *sdkp); | |
a90dfdc2 DLM |
283 | extern int sd_zbc_write_lock_zone(struct scsi_cmnd *cmd); |
284 | extern void sd_zbc_write_unlock_zone(struct scsi_cmnd *cmd); | |
89d94756 HR |
285 | extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd); |
286 | extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd); | |
287 | extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, | |
288 | struct scsi_sense_hdr *sshdr); | |
289 | ||
290 | #else /* CONFIG_BLK_DEV_ZONED */ | |
291 | ||
292 | static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, | |
293 | unsigned char *buf) | |
294 | { | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static inline void sd_zbc_remove(struct scsi_disk *sdkp) {} | |
299 | ||
300 | static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {} | |
301 | ||
a90dfdc2 | 302 | static inline int sd_zbc_write_lock_zone(struct scsi_cmnd *cmd) |
89d94756 HR |
303 | { |
304 | /* Let the drive fail requests */ | |
305 | return BLKPREP_OK; | |
306 | } | |
307 | ||
a90dfdc2 | 308 | static inline void sd_zbc_write_unlock_zone(struct scsi_cmnd *cmd) {} |
89d94756 HR |
309 | |
310 | static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd) | |
311 | { | |
312 | return BLKPREP_INVALID; | |
313 | } | |
314 | ||
315 | static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd) | |
316 | { | |
317 | return BLKPREP_INVALID; | |
318 | } | |
319 | ||
320 | static inline void sd_zbc_complete(struct scsi_cmnd *cmd, | |
321 | unsigned int good_bytes, | |
322 | struct scsi_sense_hdr *sshdr) {} | |
323 | ||
324 | #endif /* CONFIG_BLK_DEV_ZONED */ | |
325 | ||
e73aec82 | 326 | #endif /* _SCSI_DISK_H */ |