Line data Source code
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 :
42 : enum {
43 : SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
44 : SD_MEMPOOL_SIZE = 2, /* CDB pool size */
45 : };
46 :
47 : enum {
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 :
54 : enum {
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 :
63 : enum {
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 :
70 : struct 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 rev_nr_zones;
79 : u32 zone_blocks;
80 : u32 rev_zone_blocks;
81 : u32 zones_optimal_open;
82 : u32 zones_optimal_nonseq;
83 : u32 zones_max_open;
84 : u32 *zones_wp_offset;
85 : spinlock_t zones_wp_offset_lock;
86 : u32 *rev_wp_offset;
87 : struct mutex rev_mutex;
88 : struct work_struct zone_wp_offset_work;
89 : char *zone_wp_update_buf;
90 : #endif
91 : atomic_t openers;
92 : sector_t capacity; /* size in logical blocks */
93 : int max_retries;
94 : u32 max_xfer_blocks;
95 : u32 opt_xfer_blocks;
96 : u32 max_ws_blocks;
97 : u32 max_unmap_blocks;
98 : u32 unmap_granularity;
99 : u32 unmap_alignment;
100 : u32 index;
101 : unsigned int physical_block_size;
102 : unsigned int max_medium_access_timeouts;
103 : unsigned int medium_access_timed_out;
104 : u8 media_present;
105 : u8 write_prot;
106 : u8 protection_type;/* Data Integrity Field */
107 : u8 provisioning_mode;
108 : u8 zeroing_mode;
109 : unsigned ATO : 1; /* state of disk ATO bit */
110 : unsigned cache_override : 1; /* temp override of WCE,RCD */
111 : unsigned WCE : 1; /* state of disk WCE bit */
112 : unsigned RCD : 1; /* state of disk RCD bit, unused */
113 : unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
114 : unsigned first_scan : 1;
115 : unsigned lbpme : 1;
116 : unsigned lbprz : 1;
117 : unsigned lbpu : 1;
118 : unsigned lbpws : 1;
119 : unsigned lbpws10 : 1;
120 : unsigned lbpvpd : 1;
121 : unsigned ws10 : 1;
122 : unsigned ws16 : 1;
123 : unsigned rc_basis: 2;
124 : unsigned zoned: 2;
125 : unsigned urswrz : 1;
126 : unsigned security : 1;
127 : unsigned ignore_medium_access_errors : 1;
128 : };
129 : #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
130 :
131 0 : static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
132 : {
133 0 : return container_of(disk->private_data, struct scsi_disk, driver);
134 : }
135 :
136 : #define sd_printk(prefix, sdsk, fmt, a...) \
137 : (sdsk)->disk ? \
138 : sdev_prefix_printk(prefix, (sdsk)->device, \
139 : (sdsk)->disk->disk_name, fmt, ##a) : \
140 : sdev_printk(prefix, (sdsk)->device, fmt, ##a)
141 :
142 : #define sd_first_printk(prefix, sdsk, fmt, a...) \
143 : do { \
144 : if ((sdsk)->first_scan) \
145 : sd_printk(prefix, sdsk, fmt, ##a); \
146 : } while (0)
147 :
148 0 : static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
149 : {
150 0 : switch (scmd->cmnd[0]) {
151 : case READ_6:
152 : case READ_10:
153 : case READ_12:
154 : case READ_16:
155 : case SYNCHRONIZE_CACHE:
156 : case VERIFY:
157 : case VERIFY_12:
158 : case VERIFY_16:
159 : case WRITE_6:
160 : case WRITE_10:
161 : case WRITE_12:
162 : case WRITE_16:
163 : case WRITE_SAME:
164 : case WRITE_SAME_16:
165 : case UNMAP:
166 : return 1;
167 0 : case VARIABLE_LENGTH_CMD:
168 0 : switch (scmd->cmnd[9]) {
169 : case READ_32:
170 : case VERIFY_32:
171 : case WRITE_32:
172 : case WRITE_SAME_32:
173 : return 1;
174 : }
175 : }
176 :
177 0 : return 0;
178 : }
179 :
180 0 : static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
181 : {
182 0 : return blocks << (ilog2(sdev->sector_size) - 9);
183 : }
184 :
185 0 : static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
186 : {
187 0 : return blocks * sdev->sector_size;
188 : }
189 :
190 0 : static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
191 : {
192 0 : return bytes >> ilog2(sdev->sector_size);
193 : }
194 :
195 0 : static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
196 : {
197 0 : return sector >> (ilog2(sdev->sector_size) - 9);
198 : }
199 :
200 : #ifdef CONFIG_BLK_DEV_INTEGRITY
201 :
202 : extern void sd_dif_config_host(struct scsi_disk *);
203 :
204 : #else /* CONFIG_BLK_DEV_INTEGRITY */
205 :
206 : static inline void sd_dif_config_host(struct scsi_disk *disk)
207 : {
208 : }
209 :
210 : #endif /* CONFIG_BLK_DEV_INTEGRITY */
211 :
212 0 : static inline int sd_is_zoned(struct scsi_disk *sdkp)
213 : {
214 0 : return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC;
215 : }
216 :
217 : #ifdef CONFIG_BLK_DEV_ZONED
218 :
219 : void sd_zbc_release_disk(struct scsi_disk *sdkp);
220 : int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
221 : int sd_zbc_revalidate_zones(struct scsi_disk *sdkp);
222 : blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
223 : unsigned char op, bool all);
224 : unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
225 : struct scsi_sense_hdr *sshdr);
226 : int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
227 : unsigned int nr_zones, report_zones_cb cb, void *data);
228 :
229 : blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba,
230 : unsigned int nr_blocks);
231 :
232 : #else /* CONFIG_BLK_DEV_ZONED */
233 :
234 0 : static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {}
235 :
236 0 : static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
237 : unsigned char *buf)
238 : {
239 0 : return 0;
240 : }
241 :
242 0 : static inline int sd_zbc_revalidate_zones(struct scsi_disk *sdkp)
243 : {
244 0 : return 0;
245 : }
246 :
247 : static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
248 : unsigned char op,
249 : bool all)
250 : {
251 : return BLK_STS_TARGET;
252 : }
253 :
254 : static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd,
255 : unsigned int good_bytes, struct scsi_sense_hdr *sshdr)
256 : {
257 : return good_bytes;
258 : }
259 :
260 0 : static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd,
261 : sector_t *lba,
262 : unsigned int nr_blocks)
263 : {
264 0 : return BLK_STS_TARGET;
265 : }
266 :
267 : #define sd_zbc_report_zones NULL
268 :
269 : #endif /* CONFIG_BLK_DEV_ZONED */
270 :
271 : void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr);
272 : void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result);
273 :
274 : #endif /* _SCSI_DISK_H */
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