Commit | Line | Data |
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7c45b226 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Block driver for media (i.e., flash cards) | |
4 | * | |
5 | * Copyright 2002 Hewlett-Packard Company | |
979ce720 | 6 | * Copyright 2005-2008 Pierre Ossman |
1da177e4 LT |
7 | * |
8 | * Use consistent with the GNU GPL is permitted, | |
9 | * provided that this copyright notice is | |
10 | * preserved in its entirety in all copies and derived works. | |
11 | * | |
12 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |
13 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |
14 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |
15 | * | |
16 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |
17 | * | |
18 | * Author: Andrew Christian | |
19 | * 28 May 2002 | |
20 | */ | |
21 | #include <linux/moduleparam.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/init.h> | |
24 | ||
1da177e4 LT |
25 | #include <linux/kernel.h> |
26 | #include <linux/fs.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/errno.h> |
29 | #include <linux/hdreg.h> | |
30 | #include <linux/kdev_t.h> | |
edb25572 | 31 | #include <linux/kref.h> |
1da177e4 | 32 | #include <linux/blkdev.h> |
97548575 | 33 | #include <linux/cdev.h> |
a621aaed | 34 | #include <linux/mutex.h> |
ec5a19dd | 35 | #include <linux/scatterlist.h> |
a7bbb573 | 36 | #include <linux/string_helpers.h> |
cb87ea28 JC |
37 | #include <linux/delay.h> |
38 | #include <linux/capability.h> | |
39 | #include <linux/compat.h> | |
e94cfef6 | 40 | #include <linux/pm_runtime.h> |
b10fa99e | 41 | #include <linux/idr.h> |
627c3ccf | 42 | #include <linux/debugfs.h> |
1da177e4 | 43 | |
cb87ea28 | 44 | #include <linux/mmc/ioctl.h> |
1da177e4 | 45 | #include <linux/mmc/card.h> |
385e3227 | 46 | #include <linux/mmc/host.h> |
da7fbe58 PO |
47 | #include <linux/mmc/mmc.h> |
48 | #include <linux/mmc/sd.h> | |
1da177e4 | 49 | |
7c0f6ba6 | 50 | #include <linux/uaccess.h> |
1da177e4 | 51 | |
98ac2162 | 52 | #include "queue.h" |
48ab086d | 53 | #include "block.h" |
55244c56 | 54 | #include "core.h" |
4facdde1 | 55 | #include "card.h" |
93f1c150 | 56 | #include "crypto.h" |
5857b29b | 57 | #include "host.h" |
4facdde1 | 58 | #include "bus.h" |
55244c56 | 59 | #include "mmc_ops.h" |
28fc64af | 60 | #include "quirks.h" |
55244c56 | 61 | #include "sd_ops.h" |
1da177e4 | 62 | |
6b0b6285 | 63 | MODULE_ALIAS("mmc:block"); |
5e71b7a6 OJ |
64 | #ifdef MODULE_PARAM_PREFIX |
65 | #undef MODULE_PARAM_PREFIX | |
66 | #endif | |
67 | #define MODULE_PARAM_PREFIX "mmcblk." | |
68 | ||
6b7a363d AH |
69 | /* |
70 | * Set a 10 second timeout for polling write request busy state. Note, mmc core | |
71 | * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10 | |
72 | * second software timer to timeout the whole request, so 10 seconds should be | |
73 | * ample. | |
74 | */ | |
75 | #define MMC_BLK_TIMEOUT_MS (10 * 1000) | |
775a9362 | 76 | #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) |
a0e95766 | 77 | #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) |
6a7a6b45 | 78 | |
5e71b7a6 | 79 | static DEFINE_MUTEX(block_mutex); |
6b0b6285 | 80 | |
1da177e4 | 81 | /* |
5e71b7a6 OJ |
82 | * The defaults come from config options but can be overriden by module |
83 | * or bootarg options. | |
1da177e4 | 84 | */ |
5e71b7a6 | 85 | static int perdev_minors = CONFIG_MMC_BLOCK_MINORS; |
1dff3144 | 86 | |
5e71b7a6 OJ |
87 | /* |
88 | * We've only got one major, so number of mmcblk devices is | |
a26eba61 | 89 | * limited to (1 << 20) / number of minors per device. It is also |
b10fa99e | 90 | * limited by the MAX_DEVICES below. |
5e71b7a6 OJ |
91 | */ |
92 | static int max_devices; | |
93 | ||
a26eba61 BH |
94 | #define MAX_DEVICES 256 |
95 | ||
b10fa99e | 96 | static DEFINE_IDA(mmc_blk_ida); |
97548575 | 97 | static DEFINE_IDA(mmc_rpmb_ida); |
1da177e4 | 98 | |
6966e609 UH |
99 | struct mmc_blk_busy_data { |
100 | struct mmc_card *card; | |
101 | u32 status; | |
102 | }; | |
103 | ||
1da177e4 LT |
104 | /* |
105 | * There is one mmc_blk_data per slot. | |
106 | */ | |
107 | struct mmc_blk_data { | |
307d8e6f | 108 | struct device *parent; |
1da177e4 LT |
109 | struct gendisk *disk; |
110 | struct mmc_queue queue; | |
371a689f | 111 | struct list_head part; |
97548575 | 112 | struct list_head rpmbs; |
1da177e4 | 113 | |
d0c97cfb AW |
114 | unsigned int flags; |
115 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
116 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
117 | ||
edb25572 | 118 | struct kref kref; |
a6f6c96b | 119 | unsigned int read_only; |
371a689f | 120 | unsigned int part_type; |
67716327 AH |
121 | unsigned int reset_done; |
122 | #define MMC_BLK_READ BIT(0) | |
123 | #define MMC_BLK_WRITE BIT(1) | |
124 | #define MMC_BLK_DISCARD BIT(2) | |
125 | #define MMC_BLK_SECDISCARD BIT(3) | |
1e8e55b6 | 126 | #define MMC_BLK_CQE_RECOVERY BIT(4) |
f7b6fc32 | 127 | #define MMC_BLK_TRIM BIT(5) |
371a689f AW |
128 | |
129 | /* | |
130 | * Only set in main mmc_blk_data associated | |
fc95e30b | 131 | * with mmc_card with dev_set_drvdata, and keeps |
371a689f AW |
132 | * track of the current selected device partition. |
133 | */ | |
134 | unsigned int part_curr; | |
406e1480 | 135 | #define MMC_BLK_PART_INVALID UINT_MAX /* Unknown partition active */ |
add710ea | 136 | int area_type; |
f9f0da98 AH |
137 | |
138 | /* debugfs files (only in main mmc_blk_data) */ | |
139 | struct dentry *status_dentry; | |
140 | struct dentry *ext_csd_dentry; | |
1da177e4 LT |
141 | }; |
142 | ||
97548575 LW |
143 | /* Device type for RPMB character devices */ |
144 | static dev_t mmc_rpmb_devt; | |
145 | ||
146 | /* Bus type for RPMB character devices */ | |
147 | static struct bus_type mmc_rpmb_bus_type = { | |
148 | .name = "mmc_rpmb", | |
149 | }; | |
150 | ||
151 | /** | |
152 | * struct mmc_rpmb_data - special RPMB device type for these areas | |
153 | * @dev: the device for the RPMB area | |
154 | * @chrdev: character device for the RPMB area | |
155 | * @id: unique device ID number | |
156 | * @part_index: partition index (0 on first) | |
157 | * @md: parent MMC block device | |
158 | * @node: list item, so we can put this device on a list | |
159 | */ | |
160 | struct mmc_rpmb_data { | |
161 | struct device dev; | |
162 | struct cdev chrdev; | |
163 | int id; | |
164 | unsigned int part_index; | |
165 | struct mmc_blk_data *md; | |
166 | struct list_head node; | |
167 | }; | |
168 | ||
a621aaed | 169 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 170 | |
5e71b7a6 OJ |
171 | module_param(perdev_minors, int, 0444); |
172 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
173 | ||
8d1e977d | 174 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 175 | unsigned int part_type); |
511ce378 BW |
176 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
177 | struct mmc_card *card, | |
b3fa3e6d | 178 | int recovery_mode, |
511ce378 BW |
179 | struct mmc_queue *mq); |
180 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq); | |
cdf8a6fb | 181 | |
1da177e4 LT |
182 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
183 | { | |
184 | struct mmc_blk_data *md; | |
185 | ||
a621aaed | 186 | mutex_lock(&open_lock); |
1da177e4 | 187 | md = disk->private_data; |
edb25572 | 188 | if (md && !kref_get_unless_zero(&md->kref)) |
1da177e4 | 189 | md = NULL; |
a621aaed | 190 | mutex_unlock(&open_lock); |
1da177e4 LT |
191 | |
192 | return md; | |
193 | } | |
194 | ||
371a689f AW |
195 | static inline int mmc_get_devidx(struct gendisk *disk) |
196 | { | |
382c55f8 | 197 | int devidx = disk->first_minor / perdev_minors; |
371a689f AW |
198 | return devidx; |
199 | } | |
200 | ||
edb25572 | 201 | static void mmc_blk_kref_release(struct kref *ref) |
1da177e4 | 202 | { |
edb25572 SB |
203 | struct mmc_blk_data *md = container_of(ref, struct mmc_blk_data, kref); |
204 | int devidx; | |
249cda33 | 205 | |
edb25572 SB |
206 | devidx = mmc_get_devidx(md->disk); |
207 | ida_simple_remove(&mmc_blk_ida, devidx); | |
208 | ||
209 | mutex_lock(&open_lock); | |
210 | md->disk->private_data = NULL; | |
a621aaed | 211 | mutex_unlock(&open_lock); |
edb25572 SB |
212 | |
213 | put_disk(md->disk); | |
214 | kfree(md); | |
215 | } | |
216 | ||
217 | static void mmc_blk_put(struct mmc_blk_data *md) | |
218 | { | |
219 | kref_put(&md->kref, mmc_blk_kref_release); | |
1da177e4 LT |
220 | } |
221 | ||
add710ea JR |
222 | static ssize_t power_ro_lock_show(struct device *dev, |
223 | struct device_attribute *attr, char *buf) | |
224 | { | |
225 | int ret; | |
226 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
227 | struct mmc_card *card = md->queue.card; | |
228 | int locked = 0; | |
229 | ||
230 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN) | |
231 | locked = 2; | |
232 | else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) | |
233 | locked = 1; | |
234 | ||
235 | ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); | |
236 | ||
9098f84c TW |
237 | mmc_blk_put(md); |
238 | ||
add710ea JR |
239 | return ret; |
240 | } | |
241 | ||
242 | static ssize_t power_ro_lock_store(struct device *dev, | |
243 | struct device_attribute *attr, const char *buf, size_t count) | |
244 | { | |
245 | int ret; | |
246 | struct mmc_blk_data *md, *part_md; | |
0493f6fe LW |
247 | struct mmc_queue *mq; |
248 | struct request *req; | |
add710ea JR |
249 | unsigned long set; |
250 | ||
251 | if (kstrtoul(buf, 0, &set)) | |
252 | return -EINVAL; | |
253 | ||
254 | if (set != 1) | |
255 | return count; | |
256 | ||
257 | md = mmc_blk_get(dev_to_disk(dev)); | |
0493f6fe | 258 | mq = &md->queue; |
add710ea | 259 | |
0493f6fe | 260 | /* Dispatch locking to the block layer */ |
0bf6d96c | 261 | req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_OUT, 0); |
fb8e456e AH |
262 | if (IS_ERR(req)) { |
263 | count = PTR_ERR(req); | |
264 | goto out_put; | |
265 | } | |
0493f6fe | 266 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; |
b84ba30b | 267 | blk_execute_rq(req, false); |
0493f6fe | 268 | ret = req_to_mmc_queue_req(req)->drv_op_result; |
0bf6d96c | 269 | blk_mq_free_request(req); |
add710ea JR |
270 | |
271 | if (!ret) { | |
272 | pr_info("%s: Locking boot partition ro until next power on\n", | |
273 | md->disk->disk_name); | |
274 | set_disk_ro(md->disk, 1); | |
275 | ||
276 | list_for_each_entry(part_md, &md->part, part) | |
277 | if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) { | |
278 | pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name); | |
279 | set_disk_ro(part_md->disk, 1); | |
280 | } | |
281 | } | |
fb8e456e | 282 | out_put: |
add710ea JR |
283 | mmc_blk_put(md); |
284 | return count; | |
285 | } | |
286 | ||
29e6a5e0 CH |
287 | static DEVICE_ATTR(ro_lock_until_next_power_on, 0, |
288 | power_ro_lock_show, power_ro_lock_store); | |
289 | ||
371a689f AW |
290 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
291 | char *buf) | |
292 | { | |
293 | int ret; | |
294 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
295 | ||
0031a98a | 296 | ret = snprintf(buf, PAGE_SIZE, "%d\n", |
371a689f AW |
297 | get_disk_ro(dev_to_disk(dev)) ^ |
298 | md->read_only); | |
299 | mmc_blk_put(md); | |
300 | return ret; | |
301 | } | |
302 | ||
303 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
304 | const char *buf, size_t count) | |
305 | { | |
306 | int ret; | |
307 | char *end; | |
308 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
309 | unsigned long set = simple_strtoul(buf, &end, 0); | |
310 | if (end == buf) { | |
311 | ret = -EINVAL; | |
312 | goto out; | |
313 | } | |
314 | ||
315 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
316 | ret = count; | |
317 | out: | |
318 | mmc_blk_put(md); | |
319 | return ret; | |
320 | } | |
321 | ||
29e6a5e0 CH |
322 | static DEVICE_ATTR(force_ro, 0644, force_ro_show, force_ro_store); |
323 | ||
324 | static struct attribute *mmc_disk_attrs[] = { | |
325 | &dev_attr_force_ro.attr, | |
326 | &dev_attr_ro_lock_until_next_power_on.attr, | |
327 | NULL, | |
328 | }; | |
329 | ||
330 | static umode_t mmc_disk_attrs_is_visible(struct kobject *kobj, | |
331 | struct attribute *a, int n) | |
332 | { | |
0e8bb666 | 333 | struct device *dev = kobj_to_dev(kobj); |
29e6a5e0 CH |
334 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); |
335 | umode_t mode = a->mode; | |
336 | ||
337 | if (a == &dev_attr_ro_lock_until_next_power_on.attr && | |
338 | (md->area_type & MMC_BLK_DATA_AREA_BOOT) && | |
339 | md->queue.card->ext_csd.boot_ro_lockable) { | |
340 | mode = S_IRUGO; | |
341 | if (!(md->queue.card->ext_csd.boot_ro_lock & | |
342 | EXT_CSD_BOOT_WP_B_PWR_WP_DIS)) | |
343 | mode |= S_IWUSR; | |
344 | } | |
345 | ||
346 | mmc_blk_put(md); | |
347 | return mode; | |
348 | } | |
349 | ||
350 | static const struct attribute_group mmc_disk_attr_group = { | |
351 | .is_visible = mmc_disk_attrs_is_visible, | |
352 | .attrs = mmc_disk_attrs, | |
353 | }; | |
354 | ||
355 | static const struct attribute_group *mmc_disk_attr_groups[] = { | |
356 | &mmc_disk_attr_group, | |
357 | NULL, | |
358 | }; | |
359 | ||
05bdb996 | 360 | static int mmc_blk_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 361 | { |
d32e2bf8 | 362 | struct mmc_blk_data *md = mmc_blk_get(disk); |
1da177e4 LT |
363 | int ret = -ENXIO; |
364 | ||
2a48fc0a | 365 | mutex_lock(&block_mutex); |
1da177e4 | 366 | if (md) { |
1da177e4 | 367 | ret = 0; |
05bdb996 | 368 | if ((mode & BLK_OPEN_WRITE) && md->read_only) { |
70bb0896 | 369 | mmc_blk_put(md); |
a00fc090 | 370 | ret = -EROFS; |
70bb0896 | 371 | } |
1da177e4 | 372 | } |
2a48fc0a | 373 | mutex_unlock(&block_mutex); |
1da177e4 LT |
374 | |
375 | return ret; | |
376 | } | |
377 | ||
ae220766 | 378 | static void mmc_blk_release(struct gendisk *disk) |
1da177e4 | 379 | { |
a5a1561f | 380 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 381 | |
2a48fc0a | 382 | mutex_lock(&block_mutex); |
1da177e4 | 383 | mmc_blk_put(md); |
2a48fc0a | 384 | mutex_unlock(&block_mutex); |
1da177e4 LT |
385 | } |
386 | ||
387 | static int | |
a885c8c4 | 388 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 389 | { |
a885c8c4 CH |
390 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
391 | geo->heads = 4; | |
392 | geo->sectors = 16; | |
393 | return 0; | |
1da177e4 LT |
394 | } |
395 | ||
cb87ea28 JC |
396 | struct mmc_blk_ioc_data { |
397 | struct mmc_ioc_cmd ic; | |
398 | unsigned char *buf; | |
399 | u64 buf_bytes; | |
97548575 | 400 | struct mmc_rpmb_data *rpmb; |
cb87ea28 JC |
401 | }; |
402 | ||
403 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
404 | struct mmc_ioc_cmd __user *user) | |
405 | { | |
406 | struct mmc_blk_ioc_data *idata; | |
407 | int err; | |
408 | ||
1ff8950c | 409 | idata = kmalloc(sizeof(*idata), GFP_KERNEL); |
cb87ea28 JC |
410 | if (!idata) { |
411 | err = -ENOMEM; | |
aea253ec | 412 | goto out; |
cb87ea28 JC |
413 | } |
414 | ||
415 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
416 | err = -EFAULT; | |
aea253ec | 417 | goto idata_err; |
cb87ea28 JC |
418 | } |
419 | ||
420 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
421 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
422 | err = -EOVERFLOW; | |
aea253ec | 423 | goto idata_err; |
cb87ea28 JC |
424 | } |
425 | ||
bfe5b1b1 VV |
426 | if (!idata->buf_bytes) { |
427 | idata->buf = NULL; | |
4d6144de | 428 | return idata; |
bfe5b1b1 | 429 | } |
4d6144de | 430 | |
97a0c313 ME |
431 | idata->buf = memdup_user((void __user *)(unsigned long) |
432 | idata->ic.data_ptr, idata->buf_bytes); | |
433 | if (IS_ERR(idata->buf)) { | |
434 | err = PTR_ERR(idata->buf); | |
aea253ec | 435 | goto idata_err; |
cb87ea28 JC |
436 | } |
437 | ||
cb87ea28 JC |
438 | return idata; |
439 | ||
aea253ec | 440 | idata_err: |
cb87ea28 | 441 | kfree(idata); |
aea253ec | 442 | out: |
cb87ea28 | 443 | return ERR_PTR(err); |
cb87ea28 JC |
444 | } |
445 | ||
a5f5774c JH |
446 | static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, |
447 | struct mmc_blk_ioc_data *idata) | |
448 | { | |
449 | struct mmc_ioc_cmd *ic = &idata->ic; | |
450 | ||
451 | if (copy_to_user(&(ic_ptr->response), ic->response, | |
452 | sizeof(ic->response))) | |
453 | return -EFAULT; | |
454 | ||
455 | if (!idata->ic.write_flag) { | |
456 | if (copy_to_user((void __user *)(unsigned long)ic->data_ptr, | |
457 | idata->buf, idata->buf_bytes)) | |
458 | return -EFAULT; | |
459 | } | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
a5f5774c JH |
464 | static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, |
465 | struct mmc_blk_ioc_data *idata) | |
cb87ea28 | 466 | { |
a44f7cb9 | 467 | struct mmc_command cmd = {}, sbc = {}; |
c7836d15 MY |
468 | struct mmc_data data = {}; |
469 | struct mmc_request mrq = {}; | |
cb87ea28 | 470 | struct scatterlist sg; |
51f5b305 UH |
471 | bool r1b_resp, use_r1b_resp = false; |
472 | unsigned int busy_timeout_ms; | |
cb87ea28 | 473 | int err; |
97548575 | 474 | unsigned int target_part; |
cb87ea28 | 475 | |
a5f5774c JH |
476 | if (!card || !md || !idata) |
477 | return -EINVAL; | |
cb87ea28 | 478 | |
97548575 LW |
479 | /* |
480 | * The RPMB accesses comes in from the character device, so we | |
481 | * need to target these explicitly. Else we just target the | |
482 | * partition type for the block device the ioctl() was issued | |
483 | * on. | |
484 | */ | |
485 | if (idata->rpmb) { | |
486 | /* Support multiple RPMB partitions */ | |
487 | target_part = idata->rpmb->part_index; | |
488 | target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB; | |
489 | } else { | |
490 | target_part = md->part_type; | |
491 | } | |
8d1e977d | 492 | |
4d6144de JR |
493 | cmd.opcode = idata->ic.opcode; |
494 | cmd.arg = idata->ic.arg; | |
495 | cmd.flags = idata->ic.flags; | |
496 | ||
497 | if (idata->buf_bytes) { | |
498 | data.sg = &sg; | |
499 | data.sg_len = 1; | |
500 | data.blksz = idata->ic.blksz; | |
501 | data.blocks = idata->ic.blocks; | |
502 | ||
503 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
504 | ||
505 | if (idata->ic.write_flag) | |
506 | data.flags = MMC_DATA_WRITE; | |
507 | else | |
508 | data.flags = MMC_DATA_READ; | |
509 | ||
510 | /* data.flags must already be set before doing this. */ | |
511 | mmc_set_data_timeout(&data, card); | |
512 | ||
513 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
514 | if (idata->ic.data_timeout_ns) | |
515 | data.timeout_ns = idata->ic.data_timeout_ns; | |
516 | ||
4d6144de JR |
517 | mrq.data = &data; |
518 | } | |
519 | ||
520 | mrq.cmd = &cmd; | |
521 | ||
97548575 | 522 | err = mmc_blk_part_switch(card, target_part); |
8d1e977d | 523 | if (err) |
a5f5774c | 524 | return err; |
8d1e977d | 525 | |
cb87ea28 JC |
526 | if (idata->ic.is_acmd) { |
527 | err = mmc_app_cmd(card->host, card); | |
528 | if (err) | |
a5f5774c | 529 | return err; |
cb87ea28 JC |
530 | } |
531 | ||
97548575 | 532 | if (idata->rpmb) { |
a44f7cb9 WS |
533 | sbc.opcode = MMC_SET_BLOCK_COUNT; |
534 | /* | |
535 | * We don't do any blockcount validation because the max size | |
536 | * may be increased by a future standard. We just copy the | |
537 | * 'Reliable Write' bit here. | |
538 | */ | |
539 | sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31)); | |
540 | sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
541 | mrq.sbc = &sbc; | |
8d1e977d LP |
542 | } |
543 | ||
a82e484e | 544 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) && |
55c2b8b9 | 545 | (cmd.opcode == MMC_SWITCH)) |
4f111d04 | 546 | return mmc_sanitize(card, idata->ic.cmd_timeout_ms); |
775a9362 | 547 | |
51f5b305 UH |
548 | /* If it's an R1B response we need some more preparations. */ |
549 | busy_timeout_ms = idata->ic.cmd_timeout_ms ? : MMC_BLK_TIMEOUT_MS; | |
550 | r1b_resp = (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B; | |
551 | if (r1b_resp) | |
552 | use_r1b_resp = mmc_prepare_busy_cmd(card->host, &cmd, | |
553 | busy_timeout_ms); | |
554 | ||
cb87ea28 | 555 | mmc_wait_for_req(card->host, &mrq); |
e72a55f2 | 556 | memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp)); |
cb87ea28 JC |
557 | |
558 | if (cmd.error) { | |
559 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
560 | __func__, cmd.error); | |
a5f5774c | 561 | return cmd.error; |
cb87ea28 JC |
562 | } |
563 | if (data.error) { | |
564 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
565 | __func__, data.error); | |
a5f5774c | 566 | return data.error; |
cb87ea28 JC |
567 | } |
568 | ||
a0e95766 BS |
569 | /* |
570 | * Make sure the cache of the PARTITION_CONFIG register and | |
571 | * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write | |
572 | * changed it successfully. | |
573 | */ | |
574 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) && | |
575 | (cmd.opcode == MMC_SWITCH)) { | |
576 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); | |
577 | u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg); | |
578 | ||
579 | /* | |
580 | * Update cache so the next mmc_blk_part_switch call operates | |
581 | * on up-to-date data. | |
582 | */ | |
583 | card->ext_csd.part_config = value; | |
584 | main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK; | |
585 | } | |
586 | ||
aea0440a AA |
587 | /* |
588 | * Make sure to update CACHE_CTRL in case it was changed. The cache | |
589 | * will get turned back on if the card is re-initialized, e.g. | |
590 | * suspend/resume or hw reset in recovery. | |
591 | */ | |
592 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) && | |
593 | (cmd.opcode == MMC_SWITCH)) { | |
594 | u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1; | |
595 | ||
596 | card->ext_csd.cache_ctrl = value; | |
597 | } | |
598 | ||
cb87ea28 JC |
599 | /* |
600 | * According to the SD specs, some commands require a delay after | |
601 | * issuing the command. | |
602 | */ | |
603 | if (idata->ic.postsleep_min_us) | |
604 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
605 | ||
51f5b305 UH |
606 | /* No need to poll when using HW busy detection. */ |
607 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) | |
608 | return 0; | |
609 | ||
610 | /* Ensure RPMB/R1B command has completed by polling with CMD13. */ | |
611 | if (idata->rpmb || r1b_resp) | |
612 | err = mmc_poll_for_busy(card, busy_timeout_ms, false, | |
613 | MMC_BUSY_IO); | |
8d1e977d | 614 | |
a5f5774c JH |
615 | return err; |
616 | } | |
617 | ||
2fe20bae | 618 | static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md, |
97548575 LW |
619 | struct mmc_ioc_cmd __user *ic_ptr, |
620 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
621 | { |
622 | struct mmc_blk_ioc_data *idata; | |
3ecd8cf2 | 623 | struct mmc_blk_ioc_data *idatas[1]; |
614f0388 | 624 | struct mmc_queue *mq; |
a5f5774c | 625 | struct mmc_card *card; |
b093410c | 626 | int err = 0, ioc_err = 0; |
614f0388 | 627 | struct request *req; |
a5f5774c JH |
628 | |
629 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); | |
630 | if (IS_ERR(idata)) | |
631 | return PTR_ERR(idata); | |
97548575 LW |
632 | /* This will be NULL on non-RPMB ioctl():s */ |
633 | idata->rpmb = rpmb; | |
a5f5774c | 634 | |
a5f5774c JH |
635 | card = md->queue.card; |
636 | if (IS_ERR(card)) { | |
637 | err = PTR_ERR(card); | |
638 | goto cmd_done; | |
639 | } | |
640 | ||
614f0388 LW |
641 | /* |
642 | * Dispatch the ioctl() into the block request queue. | |
643 | */ | |
644 | mq = &md->queue; | |
0bf6d96c | 645 | req = blk_mq_alloc_request(mq->queue, |
ff005a06 | 646 | idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
647 | if (IS_ERR(req)) { |
648 | err = PTR_ERR(req); | |
649 | goto cmd_done; | |
650 | } | |
3ecd8cf2 | 651 | idatas[0] = idata; |
97548575 LW |
652 | req_to_mmc_queue_req(req)->drv_op = |
653 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 654 | req_to_mmc_queue_req(req)->drv_op_data = idatas; |
3ecd8cf2 | 655 | req_to_mmc_queue_req(req)->ioc_count = 1; |
b84ba30b | 656 | blk_execute_rq(req, false); |
0493f6fe | 657 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
b093410c | 658 | err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata); |
0bf6d96c | 659 | blk_mq_free_request(req); |
a5f5774c | 660 | |
cb87ea28 | 661 | cmd_done: |
cb87ea28 JC |
662 | kfree(idata->buf); |
663 | kfree(idata); | |
b093410c | 664 | return ioc_err ? ioc_err : err; |
cb87ea28 JC |
665 | } |
666 | ||
2fe20bae | 667 | static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md, |
97548575 LW |
668 | struct mmc_ioc_multi_cmd __user *user, |
669 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
670 | { |
671 | struct mmc_blk_ioc_data **idata = NULL; | |
672 | struct mmc_ioc_cmd __user *cmds = user->cmds; | |
673 | struct mmc_card *card; | |
3ecd8cf2 | 674 | struct mmc_queue *mq; |
103da066 | 675 | int err = 0, ioc_err = 0; |
a5f5774c | 676 | __u64 num_of_cmds; |
103da066 | 677 | unsigned int i, n; |
3ecd8cf2 | 678 | struct request *req; |
a5f5774c JH |
679 | |
680 | if (copy_from_user(&num_of_cmds, &user->num_of_cmds, | |
681 | sizeof(num_of_cmds))) | |
682 | return -EFAULT; | |
683 | ||
aab2ee03 GU |
684 | if (!num_of_cmds) |
685 | return 0; | |
686 | ||
a5f5774c JH |
687 | if (num_of_cmds > MMC_IOC_MAX_CMDS) |
688 | return -EINVAL; | |
689 | ||
103da066 SS |
690 | n = num_of_cmds; |
691 | idata = kcalloc(n, sizeof(*idata), GFP_KERNEL); | |
a5f5774c JH |
692 | if (!idata) |
693 | return -ENOMEM; | |
694 | ||
103da066 | 695 | for (i = 0; i < n; i++) { |
a5f5774c JH |
696 | idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]); |
697 | if (IS_ERR(idata[i])) { | |
698 | err = PTR_ERR(idata[i]); | |
103da066 | 699 | n = i; |
a5f5774c JH |
700 | goto cmd_err; |
701 | } | |
97548575 LW |
702 | /* This will be NULL on non-RPMB ioctl():s */ |
703 | idata[i]->rpmb = rpmb; | |
a5f5774c JH |
704 | } |
705 | ||
a5f5774c JH |
706 | card = md->queue.card; |
707 | if (IS_ERR(card)) { | |
708 | err = PTR_ERR(card); | |
2fe20bae | 709 | goto cmd_err; |
a5f5774c JH |
710 | } |
711 | ||
a5f5774c | 712 | |
3ecd8cf2 LW |
713 | /* |
714 | * Dispatch the ioctl()s into the block request queue. | |
715 | */ | |
716 | mq = &md->queue; | |
0bf6d96c | 717 | req = blk_mq_alloc_request(mq->queue, |
ff005a06 | 718 | idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
719 | if (IS_ERR(req)) { |
720 | err = PTR_ERR(req); | |
721 | goto cmd_err; | |
722 | } | |
97548575 LW |
723 | req_to_mmc_queue_req(req)->drv_op = |
724 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 725 | req_to_mmc_queue_req(req)->drv_op_data = idata; |
103da066 | 726 | req_to_mmc_queue_req(req)->ioc_count = n; |
b84ba30b | 727 | blk_execute_rq(req, false); |
0493f6fe | 728 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
a5f5774c JH |
729 | |
730 | /* copy to user if data and response */ | |
103da066 | 731 | for (i = 0; i < n && !err; i++) |
a5f5774c | 732 | err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]); |
a5f5774c | 733 | |
0bf6d96c | 734 | blk_mq_free_request(req); |
3ecd8cf2 | 735 | |
a5f5774c | 736 | cmd_err: |
103da066 | 737 | for (i = 0; i < n; i++) { |
a5f5774c JH |
738 | kfree(idata[i]->buf); |
739 | kfree(idata[i]); | |
740 | } | |
741 | kfree(idata); | |
b093410c | 742 | return ioc_err ? ioc_err : err; |
a5f5774c JH |
743 | } |
744 | ||
61fe0e2b LW |
745 | static int mmc_blk_check_blkdev(struct block_device *bdev) |
746 | { | |
747 | /* | |
748 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
749 | * whole block device, not on a partition. This prevents overspray | |
750 | * between sibling partitions. | |
751 | */ | |
fa01b1e9 | 752 | if (!capable(CAP_SYS_RAWIO) || bdev_is_partition(bdev)) |
61fe0e2b LW |
753 | return -EPERM; |
754 | return 0; | |
755 | } | |
756 | ||
05bdb996 | 757 | static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode, |
cb87ea28 JC |
758 | unsigned int cmd, unsigned long arg) |
759 | { | |
2fe20bae | 760 | struct mmc_blk_data *md; |
61fe0e2b LW |
761 | int ret; |
762 | ||
a5f5774c JH |
763 | switch (cmd) { |
764 | case MMC_IOC_CMD: | |
61fe0e2b LW |
765 | ret = mmc_blk_check_blkdev(bdev); |
766 | if (ret) | |
767 | return ret; | |
2fe20bae LW |
768 | md = mmc_blk_get(bdev->bd_disk); |
769 | if (!md) | |
770 | return -EINVAL; | |
771 | ret = mmc_blk_ioctl_cmd(md, | |
97548575 LW |
772 | (struct mmc_ioc_cmd __user *)arg, |
773 | NULL); | |
2fe20bae LW |
774 | mmc_blk_put(md); |
775 | return ret; | |
a5f5774c | 776 | case MMC_IOC_MULTI_CMD: |
61fe0e2b LW |
777 | ret = mmc_blk_check_blkdev(bdev); |
778 | if (ret) | |
779 | return ret; | |
2fe20bae LW |
780 | md = mmc_blk_get(bdev->bd_disk); |
781 | if (!md) | |
782 | return -EINVAL; | |
783 | ret = mmc_blk_ioctl_multi_cmd(md, | |
97548575 LW |
784 | (struct mmc_ioc_multi_cmd __user *)arg, |
785 | NULL); | |
2fe20bae LW |
786 | mmc_blk_put(md); |
787 | return ret; | |
a5f5774c JH |
788 | default: |
789 | return -EINVAL; | |
790 | } | |
cb87ea28 JC |
791 | } |
792 | ||
793 | #ifdef CONFIG_COMPAT | |
05bdb996 | 794 | static int mmc_blk_compat_ioctl(struct block_device *bdev, blk_mode_t mode, |
cb87ea28 JC |
795 | unsigned int cmd, unsigned long arg) |
796 | { | |
797 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
798 | } | |
799 | #endif | |
800 | ||
dc913385 DO |
801 | static int mmc_blk_alternative_gpt_sector(struct gendisk *disk, |
802 | sector_t *sector) | |
803 | { | |
804 | struct mmc_blk_data *md; | |
805 | int ret; | |
806 | ||
807 | md = mmc_blk_get(disk); | |
808 | if (!md) | |
809 | return -EINVAL; | |
810 | ||
811 | if (md->queue.card) | |
812 | ret = mmc_card_alternative_gpt_sector(md->queue.card, sector); | |
813 | else | |
814 | ret = -ENODEV; | |
815 | ||
816 | mmc_blk_put(md); | |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
83d5cde4 | 821 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
822 | .open = mmc_blk_open, |
823 | .release = mmc_blk_release, | |
a885c8c4 | 824 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 825 | .owner = THIS_MODULE, |
cb87ea28 JC |
826 | .ioctl = mmc_blk_ioctl, |
827 | #ifdef CONFIG_COMPAT | |
828 | .compat_ioctl = mmc_blk_compat_ioctl, | |
829 | #endif | |
dc913385 | 830 | .alternative_gpt_sector = mmc_blk_alternative_gpt_sector, |
1da177e4 LT |
831 | }; |
832 | ||
025e3d5f AH |
833 | static int mmc_blk_part_switch_pre(struct mmc_card *card, |
834 | unsigned int part_type) | |
835 | { | |
836 | int ret = 0; | |
837 | ||
838 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
839 | if (card->ext_csd.cmdq_en) { | |
840 | ret = mmc_cmdq_disable(card); | |
841 | if (ret) | |
842 | return ret; | |
843 | } | |
844 | mmc_retune_pause(card->host); | |
845 | } | |
846 | ||
847 | return ret; | |
848 | } | |
849 | ||
850 | static int mmc_blk_part_switch_post(struct mmc_card *card, | |
851 | unsigned int part_type) | |
852 | { | |
853 | int ret = 0; | |
854 | ||
855 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
856 | mmc_retune_unpause(card->host); | |
857 | if (card->reenable_cmdq && !card->ext_csd.cmdq_en) | |
858 | ret = mmc_cmdq_enable(card); | |
859 | } | |
860 | ||
861 | return ret; | |
862 | } | |
863 | ||
371a689f | 864 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 865 | unsigned int part_type) |
371a689f | 866 | { |
025e3d5f | 867 | int ret = 0; |
fc95e30b | 868 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); |
0d7d85ca | 869 | |
1f797edc | 870 | if (main_md->part_curr == part_type) |
371a689f AW |
871 | return 0; |
872 | ||
873 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
874 | u8 part_config = card->ext_csd.part_config; |
875 | ||
1f797edc | 876 | ret = mmc_blk_part_switch_pre(card, part_type); |
025e3d5f AH |
877 | if (ret) |
878 | return ret; | |
57da0c04 | 879 | |
0d7d85ca | 880 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
1f797edc | 881 | part_config |= part_type; |
371a689f AW |
882 | |
883 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 884 | EXT_CSD_PART_CONFIG, part_config, |
371a689f | 885 | card->ext_csd.part_time); |
57da0c04 | 886 | if (ret) { |
1f797edc | 887 | mmc_blk_part_switch_post(card, part_type); |
371a689f | 888 | return ret; |
57da0c04 | 889 | } |
0d7d85ca AH |
890 | |
891 | card->ext_csd.part_config = part_config; | |
57da0c04 | 892 | |
025e3d5f | 893 | ret = mmc_blk_part_switch_post(card, main_md->part_curr); |
67716327 | 894 | } |
371a689f | 895 | |
1f797edc | 896 | main_md->part_curr = part_type; |
025e3d5f | 897 | return ret; |
371a689f AW |
898 | } |
899 | ||
169f03a0 | 900 | static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) |
ec5a19dd PO |
901 | { |
902 | int err; | |
051913da BD |
903 | u32 result; |
904 | __be32 *blocks; | |
ec5a19dd | 905 | |
c7836d15 MY |
906 | struct mmc_request mrq = {}; |
907 | struct mmc_command cmd = {}; | |
908 | struct mmc_data data = {}; | |
ec5a19dd PO |
909 | |
910 | struct scatterlist sg; | |
911 | ||
ec5a19dd PO |
912 | cmd.opcode = MMC_APP_CMD; |
913 | cmd.arg = card->rca << 16; | |
7213d175 | 914 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
915 | |
916 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 | 917 | if (err) |
169f03a0 | 918 | return err; |
7213d175 | 919 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) |
169f03a0 | 920 | return -EIO; |
ec5a19dd PO |
921 | |
922 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
923 | ||
924 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
925 | cmd.arg = 0; | |
7213d175 | 926 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 927 | |
ec5a19dd PO |
928 | data.blksz = 4; |
929 | data.blocks = 1; | |
930 | data.flags = MMC_DATA_READ; | |
931 | data.sg = &sg; | |
932 | data.sg_len = 1; | |
d380443c | 933 | mmc_set_data_timeout(&data, card); |
ec5a19dd | 934 | |
ec5a19dd PO |
935 | mrq.cmd = &cmd; |
936 | mrq.data = &data; | |
937 | ||
051913da BD |
938 | blocks = kmalloc(4, GFP_KERNEL); |
939 | if (!blocks) | |
169f03a0 | 940 | return -ENOMEM; |
051913da BD |
941 | |
942 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
943 | |
944 | mmc_wait_for_req(card->host, &mrq); | |
945 | ||
051913da BD |
946 | result = ntohl(*blocks); |
947 | kfree(blocks); | |
948 | ||
17b0429d | 949 | if (cmd.error || data.error) |
169f03a0 LW |
950 | return -EIO; |
951 | ||
952 | *written_blocks = result; | |
ec5a19dd | 953 | |
169f03a0 | 954 | return 0; |
ec5a19dd PO |
955 | } |
956 | ||
92c0a0cc AH |
957 | static unsigned int mmc_blk_clock_khz(struct mmc_host *host) |
958 | { | |
959 | if (host->actual_clock) | |
960 | return host->actual_clock / 1000; | |
961 | ||
962 | /* Clock may be subject to a divisor, fudge it by a factor of 2. */ | |
963 | if (host->ios.clock) | |
964 | return host->ios.clock / 2000; | |
965 | ||
966 | /* How can there be no clock */ | |
967 | WARN_ON_ONCE(1); | |
968 | return 100; /* 100 kHz is minimum possible value */ | |
969 | } | |
970 | ||
971 | static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host, | |
972 | struct mmc_data *data) | |
973 | { | |
974 | unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); | |
975 | unsigned int khz; | |
976 | ||
977 | if (data->timeout_clks) { | |
978 | khz = mmc_blk_clock_khz(host); | |
979 | ms += DIV_ROUND_UP(data->timeout_clks, khz); | |
980 | } | |
981 | ||
982 | return ms; | |
983 | } | |
984 | ||
406e1480 CL |
985 | /* |
986 | * Attempts to reset the card and get back to the requested partition. | |
987 | * Therefore any error here must result in cancelling the block layer | |
988 | * request, it must not be reattempted without going through the mmc_blk | |
989 | * partition sanity checks. | |
990 | */ | |
67716327 AH |
991 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
992 | int type) | |
993 | { | |
994 | int err; | |
406e1480 | 995 | struct mmc_blk_data *main_md = dev_get_drvdata(&host->card->dev); |
67716327 AH |
996 | |
997 | if (md->reset_done & type) | |
998 | return -EEXIST; | |
999 | ||
1000 | md->reset_done |= type; | |
b71597ed | 1001 | err = mmc_hw_reset(host->card); |
406e1480 CL |
1002 | /* |
1003 | * A successful reset will leave the card in the main partition, but | |
1004 | * upon failure it might not be, so set it to MMC_BLK_PART_INVALID | |
1005 | * in that case. | |
1006 | */ | |
1007 | main_md->part_curr = err ? MMC_BLK_PART_INVALID : main_md->part_type; | |
1008 | if (err) | |
1009 | return err; | |
67716327 | 1010 | /* Ensure we switch back to the correct partition */ |
406e1480 CL |
1011 | if (mmc_blk_part_switch(host->card, md->part_type)) |
1012 | /* | |
1013 | * We have failed to get back into the correct | |
1014 | * partition, so we need to abort the whole request. | |
1015 | */ | |
1016 | return -ENODEV; | |
1017 | return 0; | |
67716327 AH |
1018 | } |
1019 | ||
1020 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
1021 | { | |
1022 | md->reset_done &= ~type; | |
1023 | } | |
1024 | ||
5ec12396 LW |
1025 | /* |
1026 | * The non-block commands come back from the block layer after it queued it and | |
1027 | * processed it with all other requests and then they get issued in this | |
1028 | * function. | |
1029 | */ | |
1030 | static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) | |
1031 | { | |
1032 | struct mmc_queue_req *mq_rq; | |
1033 | struct mmc_card *card = mq->card; | |
1034 | struct mmc_blk_data *md = mq->blkdata; | |
69f7599e | 1035 | struct mmc_blk_ioc_data **idata; |
97548575 | 1036 | bool rpmb_ioctl; |
627c3ccf LW |
1037 | u8 **ext_csd; |
1038 | u32 status; | |
0493f6fe | 1039 | int ret; |
5ec12396 LW |
1040 | int i; |
1041 | ||
1042 | mq_rq = req_to_mmc_queue_req(req); | |
97548575 | 1043 | rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB); |
5ec12396 LW |
1044 | |
1045 | switch (mq_rq->drv_op) { | |
1046 | case MMC_DRV_OP_IOCTL: | |
70b52f09 BH |
1047 | if (card->ext_csd.cmdq_en) { |
1048 | ret = mmc_cmdq_disable(card); | |
1049 | if (ret) | |
1050 | break; | |
1051 | } | |
1052 | fallthrough; | |
97548575 | 1053 | case MMC_DRV_OP_IOCTL_RPMB: |
69f7599e | 1054 | idata = mq_rq->drv_op_data; |
7432b49b | 1055 | for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) { |
69f7599e | 1056 | ret = __mmc_blk_ioctl_cmd(card, md, idata[i]); |
0493f6fe | 1057 | if (ret) |
5ec12396 LW |
1058 | break; |
1059 | } | |
5ec12396 | 1060 | /* Always switch back to main area after RPMB access */ |
97548575 LW |
1061 | if (rpmb_ioctl) |
1062 | mmc_blk_part_switch(card, 0); | |
70b52f09 BH |
1063 | else if (card->reenable_cmdq && !card->ext_csd.cmdq_en) |
1064 | mmc_cmdq_enable(card); | |
0493f6fe LW |
1065 | break; |
1066 | case MMC_DRV_OP_BOOT_WP: | |
1067 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, | |
1068 | card->ext_csd.boot_ro_lock | | |
1069 | EXT_CSD_BOOT_WP_B_PWR_WP_EN, | |
1070 | card->ext_csd.part_time); | |
1071 | if (ret) | |
1072 | pr_err("%s: Locking boot partition ro until next power on failed: %d\n", | |
1073 | md->disk->disk_name, ret); | |
1074 | else | |
1075 | card->ext_csd.boot_ro_lock |= | |
1076 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; | |
5ec12396 | 1077 | break; |
627c3ccf LW |
1078 | case MMC_DRV_OP_GET_CARD_STATUS: |
1079 | ret = mmc_send_status(card, &status); | |
1080 | if (!ret) | |
1081 | ret = status; | |
1082 | break; | |
1083 | case MMC_DRV_OP_GET_EXT_CSD: | |
1084 | ext_csd = mq_rq->drv_op_data; | |
1085 | ret = mmc_get_ext_csd(card, ext_csd); | |
1086 | break; | |
5ec12396 | 1087 | default: |
0493f6fe LW |
1088 | pr_err("%s: unknown driver specific operation\n", |
1089 | md->disk->disk_name); | |
1090 | ret = -EINVAL; | |
5ec12396 LW |
1091 | break; |
1092 | } | |
0493f6fe | 1093 | mq_rq->drv_op_result = ret; |
0fbfd125 | 1094 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
5ec12396 LW |
1095 | } |
1096 | ||
f7b6fc32 VW |
1097 | static void mmc_blk_issue_erase_rq(struct mmc_queue *mq, struct request *req, |
1098 | int type, unsigned int erase_arg) | |
bd788c96 | 1099 | { |
7db3028e | 1100 | struct mmc_blk_data *md = mq->blkdata; |
bd788c96 | 1101 | struct mmc_card *card = md->queue.card; |
01904ff7 | 1102 | unsigned int from, nr; |
f7b6fc32 | 1103 | int err = 0; |
2a842aca | 1104 | blk_status_t status = BLK_STS_OK; |
bd788c96 | 1105 | |
bd788c96 | 1106 | if (!mmc_can_erase(card)) { |
2a842aca | 1107 | status = BLK_STS_NOTSUPP; |
8cb6ed17 | 1108 | goto fail; |
bd788c96 AH |
1109 | } |
1110 | ||
1111 | from = blk_rq_pos(req); | |
1112 | nr = blk_rq_sectors(req); | |
1113 | ||
164b50b3 GU |
1114 | do { |
1115 | err = 0; | |
1116 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
1117 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1118 | INAND_CMD38_ARG_EXT_CSD, | |
f7b6fc32 | 1119 | erase_arg == MMC_TRIM_ARG ? |
164b50b3 GU |
1120 | INAND_CMD38_ARG_TRIM : |
1121 | INAND_CMD38_ARG_ERASE, | |
ad91619a | 1122 | card->ext_csd.generic_cmd6_time); |
164b50b3 GU |
1123 | } |
1124 | if (!err) | |
f7b6fc32 | 1125 | err = mmc_erase(card, from, nr, erase_arg); |
164b50b3 | 1126 | } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); |
2a842aca CH |
1127 | if (err) |
1128 | status = BLK_STS_IOERR; | |
1129 | else | |
67716327 | 1130 | mmc_blk_reset_success(md, type); |
8cb6ed17 | 1131 | fail: |
0fbfd125 | 1132 | blk_mq_end_request(req, status); |
bd788c96 AH |
1133 | } |
1134 | ||
f7b6fc32 VW |
1135 | static void mmc_blk_issue_trim_rq(struct mmc_queue *mq, struct request *req) |
1136 | { | |
1137 | mmc_blk_issue_erase_rq(mq, req, MMC_BLK_TRIM, MMC_TRIM_ARG); | |
1138 | } | |
1139 | ||
1140 | static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) | |
1141 | { | |
1142 | struct mmc_blk_data *md = mq->blkdata; | |
1143 | struct mmc_card *card = md->queue.card; | |
07d2872b | 1144 | unsigned int arg = card->erase_arg; |
f7b6fc32 | 1145 | |
07d2872b AA |
1146 | if (mmc_card_broken_sd_discard(card)) |
1147 | arg = SD_ERASE_ARG; | |
1148 | ||
1149 | mmc_blk_issue_erase_rq(mq, req, MMC_BLK_DISCARD, arg); | |
f7b6fc32 VW |
1150 | } |
1151 | ||
df061588 | 1152 | static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
49804548 AH |
1153 | struct request *req) |
1154 | { | |
7db3028e | 1155 | struct mmc_blk_data *md = mq->blkdata; |
49804548 | 1156 | struct mmc_card *card = md->queue.card; |
775a9362 | 1157 | unsigned int from, nr, arg; |
67716327 | 1158 | int err = 0, type = MMC_BLK_SECDISCARD; |
2a842aca | 1159 | blk_status_t status = BLK_STS_OK; |
49804548 | 1160 | |
775a9362 | 1161 | if (!(mmc_can_secure_erase_trim(card))) { |
2a842aca | 1162 | status = BLK_STS_NOTSUPP; |
49804548 AH |
1163 | goto out; |
1164 | } | |
1165 | ||
28302812 AH |
1166 | from = blk_rq_pos(req); |
1167 | nr = blk_rq_sectors(req); | |
1168 | ||
775a9362 ME |
1169 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) |
1170 | arg = MMC_SECURE_TRIM1_ARG; | |
1171 | else | |
1172 | arg = MMC_SECURE_ERASE_ARG; | |
d9ddd629 | 1173 | |
67716327 | 1174 | retry: |
6a7a6b45 AW |
1175 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1176 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1177 | INAND_CMD38_ARG_EXT_CSD, | |
1178 | arg == MMC_SECURE_TRIM1_ARG ? | |
1179 | INAND_CMD38_ARG_SECTRIM1 : | |
1180 | INAND_CMD38_ARG_SECERASE, | |
ad91619a | 1181 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1182 | if (err) |
28302812 | 1183 | goto out_retry; |
6a7a6b45 | 1184 | } |
28302812 | 1185 | |
49804548 | 1186 | err = mmc_erase(card, from, nr, arg); |
28302812 AH |
1187 | if (err == -EIO) |
1188 | goto out_retry; | |
2a842aca CH |
1189 | if (err) { |
1190 | status = BLK_STS_IOERR; | |
28302812 | 1191 | goto out; |
2a842aca | 1192 | } |
28302812 AH |
1193 | |
1194 | if (arg == MMC_SECURE_TRIM1_ARG) { | |
6a7a6b45 AW |
1195 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1196 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1197 | INAND_CMD38_ARG_EXT_CSD, | |
1198 | INAND_CMD38_ARG_SECTRIM2, | |
ad91619a | 1199 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1200 | if (err) |
28302812 | 1201 | goto out_retry; |
6a7a6b45 | 1202 | } |
28302812 | 1203 | |
49804548 | 1204 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
28302812 AH |
1205 | if (err == -EIO) |
1206 | goto out_retry; | |
2a842aca CH |
1207 | if (err) { |
1208 | status = BLK_STS_IOERR; | |
28302812 | 1209 | goto out; |
2a842aca | 1210 | } |
6a7a6b45 | 1211 | } |
28302812 | 1212 | |
28302812 AH |
1213 | out_retry: |
1214 | if (err && !mmc_blk_reset(md, card->host, type)) | |
67716327 AH |
1215 | goto retry; |
1216 | if (!err) | |
1217 | mmc_blk_reset_success(md, type); | |
28302812 | 1218 | out: |
0fbfd125 | 1219 | blk_mq_end_request(req, status); |
49804548 AH |
1220 | } |
1221 | ||
df061588 | 1222 | static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
f4c5522b | 1223 | { |
7db3028e | 1224 | struct mmc_blk_data *md = mq->blkdata; |
881d1c25 SJ |
1225 | struct mmc_card *card = md->queue.card; |
1226 | int ret = 0; | |
1227 | ||
8ae11ede | 1228 | ret = mmc_flush_cache(card->host); |
0fbfd125 | 1229 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
f4c5522b AW |
1230 | } |
1231 | ||
1232 | /* | |
1233 | * Reformat current write as a reliable write, supporting | |
1234 | * both legacy and the enhanced reliable write MMC cards. | |
1235 | * In each transfer we'll handle only as much as a single | |
1236 | * reliable write can handle, thus finish the request in | |
1237 | * partial completions. | |
1238 | */ | |
d0c97cfb AW |
1239 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
1240 | struct mmc_card *card, | |
1241 | struct request *req) | |
f4c5522b | 1242 | { |
f4c5522b AW |
1243 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
1244 | /* Legacy mode imposes restrictions on transfers. */ | |
9cb38f7a | 1245 | if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors)) |
f4c5522b AW |
1246 | brq->data.blocks = 1; |
1247 | ||
1248 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
1249 | brq->data.blocks = card->ext_csd.rel_sectors; | |
1250 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
1251 | brq->data.blocks = 1; | |
1252 | } | |
f4c5522b AW |
1253 | } |
1254 | ||
f47a1fe3 AH |
1255 | #define CMD_ERRORS_EXCL_OOR \ |
1256 | (R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
4c2b8f26 RKAL |
1257 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ |
1258 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
a04e6bae | 1259 | R1_CARD_ECC_FAILED | /* Card ECC failed */ \ |
4c2b8f26 RKAL |
1260 | R1_CC_ERROR | /* Card controller error */ \ |
1261 | R1_ERROR) /* General/unknown error */ | |
1262 | ||
f47a1fe3 AH |
1263 | #define CMD_ERRORS \ |
1264 | (CMD_ERRORS_EXCL_OOR | \ | |
1265 | R1_OUT_OF_RANGE) /* Command argument out of range */ \ | |
1266 | ||
d83c2dba | 1267 | static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) |
a04e6bae | 1268 | { |
d83c2dba | 1269 | u32 val; |
a04e6bae | 1270 | |
d83c2dba SL |
1271 | /* |
1272 | * Per the SD specification(physical layer version 4.10)[1], | |
1273 | * section 4.3.3, it explicitly states that "When the last | |
1274 | * block of user area is read using CMD18, the host should | |
1275 | * ignore OUT_OF_RANGE error that may occur even the sequence | |
1276 | * is correct". And JESD84-B51 for eMMC also has a similar | |
1277 | * statement on section 6.8.3. | |
1278 | * | |
1279 | * Multiple block read/write could be done by either predefined | |
1280 | * method, namely CMD23, or open-ending mode. For open-ending mode, | |
1281 | * we should ignore the OUT_OF_RANGE error as it's normal behaviour. | |
1282 | * | |
1283 | * However the spec[1] doesn't tell us whether we should also | |
1284 | * ignore that for predefined method. But per the spec[1], section | |
1285 | * 4.15 Set Block Count Command, it says"If illegal block count | |
1286 | * is set, out of range error will be indicated during read/write | |
1287 | * operation (For example, data transfer is stopped at user area | |
1288 | * boundary)." In another word, we could expect a out of range error | |
1289 | * in the response for the following CMD18/25. And if argument of | |
1290 | * CMD23 + the argument of CMD18/25 exceed the max number of blocks, | |
1291 | * we could also expect to get a -ETIMEDOUT or any error number from | |
1292 | * the host drivers due to missing data response(for write)/data(for | |
1293 | * read), as the cards will stop the data transfer by itself per the | |
1294 | * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode. | |
1295 | */ | |
1296 | ||
1297 | if (!brq->stop.error) { | |
1298 | bool oor_with_open_end; | |
1299 | /* If there is no error yet, check R1 response */ | |
1300 | ||
1301 | val = brq->stop.resp[0] & CMD_ERRORS; | |
1302 | oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc; | |
1303 | ||
1304 | if (val && !oor_with_open_end) | |
1305 | brq->stop.error = -EIO; | |
1306 | } | |
a04e6bae WS |
1307 | } |
1308 | ||
ca5717f7 | 1309 | static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, |
b3fa3e6d | 1310 | int recovery_mode, bool *do_rel_wr_p, |
d3377c01 | 1311 | bool *do_data_tag_p) |
1da177e4 | 1312 | { |
ca5717f7 AH |
1313 | struct mmc_blk_data *md = mq->blkdata; |
1314 | struct mmc_card *card = md->queue.card; | |
54d49d77 | 1315 | struct mmc_blk_request *brq = &mqrq->brq; |
67e69d52 | 1316 | struct request *req = mmc_queue_req_to_req(mqrq); |
d3377c01 | 1317 | bool do_rel_wr, do_data_tag; |
1da177e4 | 1318 | |
f4c5522b AW |
1319 | /* |
1320 | * Reliable writes are used to implement Forced Unit Access and | |
d3df0465 | 1321 | * are supported only on MMCs. |
f4c5522b | 1322 | */ |
d3377c01 AH |
1323 | do_rel_wr = (req->cmd_flags & REQ_FUA) && |
1324 | rq_data_dir(req) == WRITE && | |
1325 | (md->flags & MMC_BLK_REL_WR); | |
f4c5522b | 1326 | |
54d49d77 | 1327 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
ca5717f7 | 1328 | |
93f1c150 EB |
1329 | mmc_crypto_prepare_req(mqrq); |
1330 | ||
54d49d77 | 1331 | brq->mrq.data = &brq->data; |
93482b3d | 1332 | brq->mrq.tag = req->tag; |
1da177e4 | 1333 | |
54d49d77 PF |
1334 | brq->stop.opcode = MMC_STOP_TRANSMISSION; |
1335 | brq->stop.arg = 0; | |
ca5717f7 AH |
1336 | |
1337 | if (rq_data_dir(req) == READ) { | |
1338 | brq->data.flags = MMC_DATA_READ; | |
1339 | brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1340 | } else { | |
1341 | brq->data.flags = MMC_DATA_WRITE; | |
1342 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1343 | } | |
1344 | ||
1345 | brq->data.blksz = 512; | |
54d49d77 | 1346 | brq->data.blocks = blk_rq_sectors(req); |
93482b3d AH |
1347 | brq->data.blk_addr = blk_rq_pos(req); |
1348 | ||
1349 | /* | |
1350 | * The command queue supports 2 priorities: "high" (1) and "simple" (0). | |
1351 | * The eMMC will give "high" priority tasks priority over "simple" | |
1352 | * priority tasks. Here we always set "simple" priority by not setting | |
1353 | * MMC_DATA_PRIO. | |
1354 | */ | |
6a79e391 | 1355 | |
54d49d77 PF |
1356 | /* |
1357 | * The block layer doesn't support all sector count | |
1358 | * restrictions, so we need to be prepared for too big | |
1359 | * requests. | |
1360 | */ | |
1361 | if (brq->data.blocks > card->host->max_blk_count) | |
1362 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1363 | |
2bf22b39 | 1364 | if (brq->data.blocks > 1) { |
41591b38 CB |
1365 | /* |
1366 | * Some SD cards in SPI mode return a CRC error or even lock up | |
1367 | * completely when trying to read the last block using a | |
1368 | * multiblock read command. | |
1369 | */ | |
1370 | if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) && | |
1371 | (blk_rq_pos(req) + blk_rq_sectors(req) == | |
1372 | get_capacity(md->disk))) | |
1373 | brq->data.blocks--; | |
1374 | ||
2bf22b39 | 1375 | /* |
b3fa3e6d | 1376 | * After a read error, we redo the request one (native) sector |
2bf22b39 PW |
1377 | * at a time in order to accurately determine which |
1378 | * sectors can be read successfully. | |
1379 | */ | |
b3fa3e6d CL |
1380 | if (recovery_mode) |
1381 | brq->data.blocks = queue_physical_block_size(mq->queue) >> 9; | |
2bf22b39 | 1382 | |
2e47e842 KM |
1383 | /* |
1384 | * Some controllers have HW issues while operating | |
1385 | * in multiple I/O mode | |
1386 | */ | |
1387 | if (card->host->ops->multi_io_quirk) | |
1388 | brq->data.blocks = card->host->ops->multi_io_quirk(card, | |
1389 | (rq_data_dir(req) == READ) ? | |
1390 | MMC_DATA_READ : MMC_DATA_WRITE, | |
1391 | brq->data.blocks); | |
2bf22b39 | 1392 | } |
d0c97cfb | 1393 | |
93482b3d | 1394 | if (do_rel_wr) { |
ca5717f7 | 1395 | mmc_apply_rel_rw(brq, card, req); |
93482b3d AH |
1396 | brq->data.flags |= MMC_DATA_REL_WR; |
1397 | } | |
ca5717f7 AH |
1398 | |
1399 | /* | |
1400 | * Data tag is used only during writing meta data to speed | |
1401 | * up write and any subsequent read of this meta data | |
1402 | */ | |
d3377c01 AH |
1403 | do_data_tag = card->ext_csd.data_tag_unit_size && |
1404 | (req->cmd_flags & REQ_META) && | |
1405 | (rq_data_dir(req) == WRITE) && | |
1406 | ((brq->data.blocks * brq->data.blksz) >= | |
1407 | card->ext_csd.data_tag_unit_size); | |
ca5717f7 | 1408 | |
93482b3d AH |
1409 | if (do_data_tag) |
1410 | brq->data.flags |= MMC_DATA_DAT_TAG; | |
1411 | ||
ca5717f7 AH |
1412 | mmc_set_data_timeout(&brq->data, card); |
1413 | ||
1414 | brq->data.sg = mqrq->sg; | |
1415 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1416 | ||
1417 | /* | |
1418 | * Adjust the sg list so it is the same size as the | |
1419 | * request. | |
1420 | */ | |
1421 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1422 | int i, data_size = brq->data.blocks << 9; | |
1423 | struct scatterlist *sg; | |
1424 | ||
1425 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1426 | data_size -= sg->length; | |
1427 | if (data_size <= 0) { | |
1428 | sg->length += data_size; | |
1429 | i++; | |
1430 | break; | |
1431 | } | |
1432 | } | |
1433 | brq->data.sg_len = i; | |
1434 | } | |
1435 | ||
d3377c01 AH |
1436 | if (do_rel_wr_p) |
1437 | *do_rel_wr_p = do_rel_wr; | |
1438 | ||
1439 | if (do_data_tag_p) | |
1440 | *do_data_tag_p = do_data_tag; | |
ca5717f7 AH |
1441 | } |
1442 | ||
1e8e55b6 AH |
1443 | #define MMC_CQE_RETRIES 2 |
1444 | ||
1445 | static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) | |
1446 | { | |
1447 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1448 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1449 | struct request_queue *q = req->q; | |
1450 | struct mmc_host *host = mq->card->host; | |
e6bfb1bf | 1451 | enum mmc_issue_type issue_type = mmc_issue_type(mq, req); |
1e8e55b6 AH |
1452 | unsigned long flags; |
1453 | bool put_card; | |
1454 | int err; | |
1455 | ||
1456 | mmc_cqe_post_req(host, mrq); | |
1457 | ||
1458 | if (mrq->cmd && mrq->cmd->error) | |
1459 | err = mrq->cmd->error; | |
1460 | else if (mrq->data && mrq->data->error) | |
1461 | err = mrq->data->error; | |
1462 | else | |
1463 | err = 0; | |
1464 | ||
1465 | if (err) { | |
1466 | if (mqrq->retries++ < MMC_CQE_RETRIES) | |
1467 | blk_mq_requeue_request(req, true); | |
1468 | else | |
1469 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1470 | } else if (mrq->data) { | |
1471 | if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered)) | |
1472 | blk_mq_requeue_request(req, true); | |
1473 | else | |
1474 | __blk_mq_end_request(req, BLK_STS_OK); | |
1475 | } else { | |
1476 | blk_mq_end_request(req, BLK_STS_OK); | |
1477 | } | |
1478 | ||
f5d72c5c | 1479 | spin_lock_irqsave(&mq->lock, flags); |
1e8e55b6 | 1480 | |
e6bfb1bf | 1481 | mq->in_flight[issue_type] -= 1; |
1e8e55b6 AH |
1482 | |
1483 | put_card = (mmc_tot_in_flight(mq) == 0); | |
1484 | ||
1485 | mmc_cqe_check_busy(mq); | |
1486 | ||
f5d72c5c | 1487 | spin_unlock_irqrestore(&mq->lock, flags); |
1e8e55b6 AH |
1488 | |
1489 | if (!mq->cqe_busy) | |
1490 | blk_mq_run_hw_queues(q, true); | |
1491 | ||
1492 | if (put_card) | |
1493 | mmc_put_card(mq->card, &mq->ctx); | |
1494 | } | |
1495 | ||
1496 | void mmc_blk_cqe_recovery(struct mmc_queue *mq) | |
1497 | { | |
1498 | struct mmc_card *card = mq->card; | |
1499 | struct mmc_host *host = card->host; | |
1500 | int err; | |
1501 | ||
1502 | pr_debug("%s: CQE recovery start\n", mmc_hostname(host)); | |
1503 | ||
1504 | err = mmc_cqe_recovery(host); | |
1505 | if (err) | |
1506 | mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY); | |
a051246b | 1507 | mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY); |
1e8e55b6 AH |
1508 | |
1509 | pr_debug("%s: CQE recovery done\n", mmc_hostname(host)); | |
1510 | } | |
1511 | ||
1512 | static void mmc_blk_cqe_req_done(struct mmc_request *mrq) | |
1513 | { | |
1514 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
1515 | brq.mrq); | |
1516 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1517 | struct request_queue *q = req->q; | |
1518 | struct mmc_queue *mq = q->queuedata; | |
1519 | ||
1520 | /* | |
1521 | * Block layer timeouts race with completions which means the normal | |
1522 | * completion path cannot be used during recovery. | |
1523 | */ | |
1524 | if (mq->in_recovery) | |
1525 | mmc_blk_cqe_complete_rq(mq, req); | |
15f73f5b | 1526 | else if (likely(!blk_should_fake_timeout(req->q))) |
1e8e55b6 AH |
1527 | blk_mq_complete_request(req); |
1528 | } | |
1529 | ||
1530 | static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
1531 | { | |
1532 | mrq->done = mmc_blk_cqe_req_done; | |
1533 | mrq->recovery_notifier = mmc_cqe_recovery_notifier; | |
1534 | ||
1535 | return mmc_cqe_start_req(host, mrq); | |
1536 | } | |
1537 | ||
1538 | static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq, | |
1539 | struct request *req) | |
1540 | { | |
1541 | struct mmc_blk_request *brq = &mqrq->brq; | |
1542 | ||
1543 | memset(brq, 0, sizeof(*brq)); | |
1544 | ||
1545 | brq->mrq.cmd = &brq->cmd; | |
1546 | brq->mrq.tag = req->tag; | |
1547 | ||
1548 | return &brq->mrq; | |
1549 | } | |
1550 | ||
1551 | static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req) | |
1552 | { | |
1553 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1554 | struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req); | |
1555 | ||
1556 | mrq->cmd->opcode = MMC_SWITCH; | |
1557 | mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1558 | (EXT_CSD_FLUSH_CACHE << 16) | | |
1559 | (1 << 8) | | |
1560 | EXT_CSD_CMD_SET_NORMAL; | |
1561 | mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B; | |
1562 | ||
1563 | return mmc_blk_cqe_start_req(mq->card->host, mrq); | |
1564 | } | |
1565 | ||
511ce378 BW |
1566 | static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1567 | { | |
1568 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1569 | struct mmc_host *host = mq->card->host; | |
1570 | int err; | |
1571 | ||
1572 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
1573 | mqrq->brq.mrq.done = mmc_blk_hsq_req_done; | |
1574 | mmc_pre_req(host, &mqrq->brq.mrq); | |
1575 | ||
1576 | err = mmc_cqe_start_req(host, &mqrq->brq.mrq); | |
1577 | if (err) | |
1578 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
1579 | ||
1580 | return err; | |
1581 | } | |
1582 | ||
1e8e55b6 AH |
1583 | static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1584 | { | |
1585 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
511ce378 BW |
1586 | struct mmc_host *host = mq->card->host; |
1587 | ||
1588 | if (host->hsq_enabled) | |
1589 | return mmc_blk_hsq_issue_rw_rq(mq, req); | |
1e8e55b6 AH |
1590 | |
1591 | mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL); | |
1592 | ||
1593 | return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq); | |
1594 | } | |
1595 | ||
ca5717f7 AH |
1596 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
1597 | struct mmc_card *card, | |
b3fa3e6d | 1598 | int recovery_mode, |
ca5717f7 AH |
1599 | struct mmc_queue *mq) |
1600 | { | |
1601 | u32 readcmd, writecmd; | |
1602 | struct mmc_blk_request *brq = &mqrq->brq; | |
67e69d52 | 1603 | struct request *req = mmc_queue_req_to_req(mqrq); |
ca5717f7 AH |
1604 | struct mmc_blk_data *md = mq->blkdata; |
1605 | bool do_rel_wr, do_data_tag; | |
1606 | ||
b3fa3e6d | 1607 | mmc_blk_data_prep(mq, mqrq, recovery_mode, &do_rel_wr, &do_data_tag); |
ca5717f7 AH |
1608 | |
1609 | brq->mrq.cmd = &brq->cmd; | |
1610 | ||
1611 | brq->cmd.arg = blk_rq_pos(req); | |
1612 | if (!mmc_card_blockaddr(card)) | |
1613 | brq->cmd.arg <<= 9; | |
1614 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1615 | ||
54d49d77 PF |
1616 | if (brq->data.blocks > 1 || do_rel_wr) { |
1617 | /* SPI multiblock writes terminate using a special | |
1618 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1619 | */ |
54d49d77 PF |
1620 | if (!mmc_host_is_spi(card->host) || |
1621 | rq_data_dir(req) == READ) | |
1622 | brq->mrq.stop = &brq->stop; | |
1623 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1624 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1625 | } else { | |
1626 | brq->mrq.stop = NULL; | |
1627 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1628 | writecmd = MMC_WRITE_BLOCK; | |
1629 | } | |
ca5717f7 | 1630 | brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd; |
4265900e | 1631 | |
54d49d77 PF |
1632 | /* |
1633 | * Pre-defined multi-block transfers are preferable to | |
1634 | * open ended-ones (and necessary for reliable writes). | |
1635 | * However, it is not sufficient to just send CMD23, | |
1636 | * and avoid the final CMD12, as on an error condition | |
1637 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1638 | * with Auto-CMD23 enhancements provided by some | |
1639 | * hosts, means that the complexity of dealing | |
1640 | * with this is best left to the host. If CMD23 is | |
1641 | * supported by card and host, we'll fill sbc in and let | |
1642 | * the host deal with handling it correctly. This means | |
1643 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1644 | * change of behavior will be observed. | |
1645 | * | |
1646 | * N.B: Some MMC cards experience perf degradation. | |
1647 | * We'll avoid using CMD23-bounded multiblock writes for | |
1648 | * these, while retaining features like reliable writes. | |
1649 | */ | |
4265900e SD |
1650 | if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && |
1651 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || | |
1652 | do_data_tag)) { | |
54d49d77 PF |
1653 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; |
1654 | brq->sbc.arg = brq->data.blocks | | |
4265900e SD |
1655 | (do_rel_wr ? (1 << 31) : 0) | |
1656 | (do_data_tag ? (1 << 29) : 0); | |
54d49d77 PF |
1657 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1658 | brq->mrq.sbc = &brq->sbc; | |
1659 | } | |
54d49d77 | 1660 | } |
6a79e391 | 1661 | |
81196976 | 1662 | #define MMC_MAX_RETRIES 5 |
7eb43d53 | 1663 | #define MMC_DATA_RETRIES 2 |
81196976 AH |
1664 | #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1) |
1665 | ||
7eb43d53 AH |
1666 | static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout) |
1667 | { | |
1668 | struct mmc_command cmd = { | |
1669 | .opcode = MMC_STOP_TRANSMISSION, | |
1670 | .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC, | |
1671 | /* Some hosts wait for busy anyway, so provide a busy timeout */ | |
1672 | .busy_timeout = timeout, | |
1673 | }; | |
1674 | ||
1675 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
1676 | } | |
1677 | ||
1678 | static int mmc_blk_fix_state(struct mmc_card *card, struct request *req) | |
1679 | { | |
1680 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1681 | struct mmc_blk_request *brq = &mqrq->brq; | |
1682 | unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data); | |
1683 | int err; | |
1684 | ||
1685 | mmc_retune_hold_now(card->host); | |
1686 | ||
1687 | mmc_blk_send_stop(card, timeout); | |
1688 | ||
972d5084 | 1689 | err = mmc_poll_for_busy(card, timeout, false, MMC_BUSY_IO); |
7eb43d53 AH |
1690 | |
1691 | mmc_retune_release(card->host); | |
1692 | ||
1693 | return err; | |
1694 | } | |
1695 | ||
81196976 AH |
1696 | #define MMC_READ_SINGLE_RETRIES 2 |
1697 | ||
b3fa3e6d | 1698 | /* Single (native) sector read during recovery */ |
81196976 AH |
1699 | static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) |
1700 | { | |
1701 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1702 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1703 | struct mmc_card *card = mq->card; | |
1704 | struct mmc_host *host = card->host; | |
1705 | blk_status_t error = BLK_STS_OK; | |
b3fa3e6d | 1706 | size_t bytes_per_read = queue_physical_block_size(mq->queue); |
81196976 AH |
1707 | |
1708 | do { | |
1709 | u32 status; | |
1710 | int err; | |
54309fde | 1711 | int retries = 0; |
81196976 | 1712 | |
54309fde CL |
1713 | while (retries++ <= MMC_READ_SINGLE_RETRIES) { |
1714 | mmc_blk_rw_rq_prep(mqrq, card, 1, mq); | |
81196976 | 1715 | |
54309fde | 1716 | mmc_wait_for_req(host, mrq); |
81196976 | 1717 | |
54309fde | 1718 | err = mmc_send_status(card, &status); |
81196976 AH |
1719 | if (err) |
1720 | goto error_exit; | |
81196976 | 1721 | |
54309fde CL |
1722 | if (!mmc_host_is_spi(host) && |
1723 | !mmc_ready_for_data(status)) { | |
1724 | err = mmc_blk_fix_state(card, req); | |
1725 | if (err) | |
1726 | goto error_exit; | |
1727 | } | |
81196976 | 1728 | |
54309fde CL |
1729 | if (!mrq->cmd->error) |
1730 | break; | |
1731 | } | |
81196976 AH |
1732 | |
1733 | if (mrq->cmd->error || | |
1734 | mrq->data->error || | |
1735 | (!mmc_host_is_spi(host) && | |
1736 | (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS))) | |
1737 | error = BLK_STS_IOERR; | |
1738 | else | |
1739 | error = BLK_STS_OK; | |
1740 | ||
b3fa3e6d | 1741 | } while (blk_update_request(req, error, bytes_per_read)); |
81196976 AH |
1742 | |
1743 | return; | |
1744 | ||
1745 | error_exit: | |
1746 | mrq->data->bytes_xfered = 0; | |
b3fa3e6d | 1747 | blk_update_request(req, BLK_STS_IOERR, bytes_per_read); |
81196976 AH |
1748 | /* Let it try the remaining request again */ |
1749 | if (mqrq->retries > MMC_MAX_RETRIES - 1) | |
1750 | mqrq->retries = MMC_MAX_RETRIES - 1; | |
1751 | } | |
1752 | ||
7eb43d53 AH |
1753 | static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) |
1754 | { | |
1755 | return !!brq->mrq.sbc; | |
1756 | } | |
1757 | ||
1758 | static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) | |
1759 | { | |
1760 | return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; | |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * Check for errors the host controller driver might not have seen such as | |
1765 | * response mode errors or invalid card state. | |
1766 | */ | |
1767 | static bool mmc_blk_status_error(struct request *req, u32 status) | |
1768 | { | |
1769 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1770 | struct mmc_blk_request *brq = &mqrq->brq; | |
1771 | struct mmc_queue *mq = req->q->queuedata; | |
1772 | u32 stop_err_bits; | |
1773 | ||
1774 | if (mmc_host_is_spi(mq->card->host)) | |
aa950144 | 1775 | return false; |
7eb43d53 AH |
1776 | |
1777 | stop_err_bits = mmc_blk_stop_err_bits(brq); | |
1778 | ||
1779 | return brq->cmd.resp[0] & CMD_ERRORS || | |
1780 | brq->stop.resp[0] & stop_err_bits || | |
1781 | status & stop_err_bits || | |
40c96853 | 1782 | (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status)); |
7eb43d53 AH |
1783 | } |
1784 | ||
1785 | static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq) | |
1786 | { | |
1787 | return !brq->sbc.error && !brq->cmd.error && | |
1788 | !(brq->cmd.resp[0] & CMD_ERRORS); | |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Requests are completed by mmc_blk_mq_complete_rq() which sets simple | |
1793 | * policy: | |
1794 | * 1. A request that has transferred at least some data is considered | |
1795 | * successful and will be requeued if there is remaining data to | |
1796 | * transfer. | |
1797 | * 2. Otherwise the number of retries is incremented and the request | |
1798 | * will be requeued if there are remaining retries. | |
1799 | * 3. Otherwise the request will be errored out. | |
1800 | * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and | |
1801 | * mqrq->retries. So there are only 4 possible actions here: | |
1802 | * 1. do not accept the bytes_xfered value i.e. set it to zero | |
1803 | * 2. change mqrq->retries to determine the number of retries | |
1804 | * 3. try to reset the card | |
1805 | * 4. read one sector at a time | |
1806 | */ | |
81196976 AH |
1807 | static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) |
1808 | { | |
1809 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1810 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1811 | struct mmc_blk_request *brq = &mqrq->brq; | |
1812 | struct mmc_blk_data *md = mq->blkdata; | |
1813 | struct mmc_card *card = mq->card; | |
7eb43d53 AH |
1814 | u32 status; |
1815 | u32 blocks; | |
1816 | int err; | |
81196976 | 1817 | |
7eb43d53 AH |
1818 | /* |
1819 | * Some errors the host driver might not have seen. Set the number of | |
1820 | * bytes transferred to zero in that case. | |
1821 | */ | |
1822 | err = __mmc_send_status(card, &status, 0); | |
1823 | if (err || mmc_blk_status_error(req, status)) | |
1824 | brq->data.bytes_xfered = 0; | |
81196976 AH |
1825 | |
1826 | mmc_retune_release(card->host); | |
1827 | ||
1828 | /* | |
7eb43d53 AH |
1829 | * Try again to get the status. This also provides an opportunity for |
1830 | * re-tuning. | |
81196976 | 1831 | */ |
7eb43d53 AH |
1832 | if (err) |
1833 | err = __mmc_send_status(card, &status, 0); | |
81196976 | 1834 | |
7eb43d53 AH |
1835 | /* |
1836 | * Nothing more to do after the number of bytes transferred has been | |
1837 | * updated and there is no card. | |
1838 | */ | |
1839 | if (err && mmc_detect_card_removed(card->host)) | |
1840 | return; | |
81196976 | 1841 | |
7eb43d53 AH |
1842 | /* Try to get back to "tran" state */ |
1843 | if (!mmc_host_is_spi(mq->card->host) && | |
40c96853 | 1844 | (err || !mmc_ready_for_data(status))) |
7eb43d53 AH |
1845 | err = mmc_blk_fix_state(mq->card, req); |
1846 | ||
1847 | /* | |
1848 | * Special case for SD cards where the card might record the number of | |
1849 | * blocks written. | |
1850 | */ | |
1851 | if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) && | |
1852 | rq_data_dir(req) == WRITE) { | |
1853 | if (mmc_sd_num_wr_blocks(card, &blocks)) | |
1854 | brq->data.bytes_xfered = 0; | |
1855 | else | |
1856 | brq->data.bytes_xfered = blocks << 9; | |
81196976 | 1857 | } |
7eb43d53 AH |
1858 | |
1859 | /* Reset if the card is in a bad state */ | |
1860 | if (!mmc_host_is_spi(mq->card->host) && | |
1861 | err && mmc_blk_reset(md, card->host, type)) { | |
f3fa33ac | 1862 | pr_err("%s: recovery failed!\n", req->q->disk->disk_name); |
81196976 | 1863 | mqrq->retries = MMC_NO_RETRIES; |
7eb43d53 AH |
1864 | return; |
1865 | } | |
1866 | ||
1867 | /* | |
1868 | * If anything was done, just return and if there is anything remaining | |
1869 | * on the request it will get requeued. | |
1870 | */ | |
1871 | if (brq->data.bytes_xfered) | |
1872 | return; | |
1873 | ||
1874 | /* Reset before last retry */ | |
406e1480 CL |
1875 | if (mqrq->retries + 1 == MMC_MAX_RETRIES && |
1876 | mmc_blk_reset(md, card->host, type)) | |
1877 | return; | |
7eb43d53 AH |
1878 | |
1879 | /* Command errors fail fast, so use all MMC_MAX_RETRIES */ | |
1880 | if (brq->sbc.error || brq->cmd.error) | |
1881 | return; | |
1882 | ||
1883 | /* Reduce the remaining retries for data errors */ | |
1884 | if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) { | |
1885 | mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES; | |
1886 | return; | |
1887 | } | |
1888 | ||
b3fa3e6d CL |
1889 | if (rq_data_dir(req) == READ && brq->data.blocks > |
1890 | queue_physical_block_size(mq->queue) >> 9) { | |
1891 | /* Read one (native) sector at a time */ | |
7eb43d53 AH |
1892 | mmc_blk_read_single(mq, req); |
1893 | return; | |
81196976 AH |
1894 | } |
1895 | } | |
1896 | ||
10f21df4 AH |
1897 | static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) |
1898 | { | |
1899 | mmc_blk_eval_resp_error(brq); | |
1900 | ||
1901 | return brq->sbc.error || brq->cmd.error || brq->stop.error || | |
1902 | brq->data.error || brq->cmd.resp[0] & CMD_ERRORS; | |
1903 | } | |
1904 | ||
5d435933 CL |
1905 | static int mmc_spi_err_check(struct mmc_card *card) |
1906 | { | |
1907 | u32 status = 0; | |
1908 | int err; | |
1909 | ||
1910 | /* | |
1911 | * SPI does not have a TRAN state we have to wait on, instead the | |
1912 | * card is ready again when it no longer holds the line LOW. | |
1913 | * We still have to ensure two things here before we know the write | |
1914 | * was successful: | |
1915 | * 1. The card has not disconnected during busy and we actually read our | |
1916 | * own pull-up, thinking it was still connected, so ensure it | |
1917 | * still responds. | |
1918 | * 2. Check for any error bits, in particular R1_SPI_IDLE to catch a | |
1919 | * just reconnected card after being disconnected during busy. | |
1920 | */ | |
1921 | err = __mmc_send_status(card, &status, 0); | |
1922 | if (err) | |
1923 | return err; | |
1924 | /* All R1 and R2 bits of SPI are errors in our case */ | |
1925 | if (status) | |
1926 | return -EIO; | |
1927 | return 0; | |
1928 | } | |
1929 | ||
6966e609 UH |
1930 | static int mmc_blk_busy_cb(void *cb_data, bool *busy) |
1931 | { | |
1932 | struct mmc_blk_busy_data *data = cb_data; | |
1933 | u32 status = 0; | |
1934 | int err; | |
1935 | ||
1936 | err = mmc_send_status(data->card, &status); | |
1937 | if (err) | |
1938 | return err; | |
1939 | ||
1940 | /* Accumulate response error bits. */ | |
1941 | data->status |= status; | |
1942 | ||
1943 | *busy = !mmc_ready_for_data(status); | |
1944 | return 0; | |
1945 | } | |
1946 | ||
88a51646 AH |
1947 | static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) |
1948 | { | |
1949 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
6966e609 | 1950 | struct mmc_blk_busy_data cb_data; |
88a51646 AH |
1951 | int err; |
1952 | ||
5d435933 | 1953 | if (rq_data_dir(req) == READ) |
88a51646 AH |
1954 | return 0; |
1955 | ||
5d435933 CL |
1956 | if (mmc_host_is_spi(card->host)) { |
1957 | err = mmc_spi_err_check(card); | |
1958 | if (err) | |
1959 | mqrq->brq.data.bytes_xfered = 0; | |
1960 | return err; | |
1961 | } | |
1962 | ||
6966e609 UH |
1963 | cb_data.card = card; |
1964 | cb_data.status = 0; | |
1760fdb6 | 1965 | err = __mmc_poll_for_busy(card->host, 0, MMC_BLK_TIMEOUT_MS, |
2ebbdace | 1966 | &mmc_blk_busy_cb, &cb_data); |
88a51646 | 1967 | |
f47a1fe3 AH |
1968 | /* |
1969 | * Do not assume data transferred correctly if there are any error bits | |
1970 | * set. | |
1971 | */ | |
6966e609 | 1972 | if (cb_data.status & mmc_blk_stop_err_bits(&mqrq->brq)) { |
f47a1fe3 | 1973 | mqrq->brq.data.bytes_xfered = 0; |
88a51646 AH |
1974 | err = err ? err : -EIO; |
1975 | } | |
1976 | ||
f47a1fe3 | 1977 | /* Copy the exception bit so it will be seen later on */ |
6966e609 | 1978 | if (mmc_card_mmc(card) && cb_data.status & R1_EXCEPTION_EVENT) |
f47a1fe3 AH |
1979 | mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; |
1980 | ||
88a51646 AH |
1981 | return err; |
1982 | } | |
1983 | ||
10f21df4 AH |
1984 | static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq, |
1985 | struct request *req) | |
1986 | { | |
1987 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1988 | ||
1989 | mmc_blk_reset_success(mq->blkdata, type); | |
1990 | } | |
1991 | ||
81196976 AH |
1992 | static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req) |
1993 | { | |
1994 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1995 | unsigned int nr_bytes = mqrq->brq.data.bytes_xfered; | |
1996 | ||
1997 | if (nr_bytes) { | |
1998 | if (blk_update_request(req, BLK_STS_OK, nr_bytes)) | |
1999 | blk_mq_requeue_request(req, true); | |
2000 | else | |
2001 | __blk_mq_end_request(req, BLK_STS_OK); | |
2002 | } else if (!blk_rq_bytes(req)) { | |
2003 | __blk_mq_end_request(req, BLK_STS_IOERR); | |
2004 | } else if (mqrq->retries++ < MMC_MAX_RETRIES) { | |
2005 | blk_mq_requeue_request(req, true); | |
2006 | } else { | |
2007 | if (mmc_card_removed(mq->card)) | |
2008 | req->rq_flags |= RQF_QUIET; | |
2009 | blk_mq_end_request(req, BLK_STS_IOERR); | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq, | |
2014 | struct mmc_queue_req *mqrq) | |
2015 | { | |
2016 | return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) && | |
2017 | (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT || | |
2018 | mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT); | |
2019 | } | |
2020 | ||
2021 | static void mmc_blk_urgent_bkops(struct mmc_queue *mq, | |
2022 | struct mmc_queue_req *mqrq) | |
2023 | { | |
2024 | if (mmc_blk_urgent_bkops_needed(mq, mqrq)) | |
0c204979 | 2025 | mmc_run_bkops(mq->card); |
81196976 AH |
2026 | } |
2027 | ||
511ce378 BW |
2028 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq) |
2029 | { | |
2030 | struct mmc_queue_req *mqrq = | |
2031 | container_of(mrq, struct mmc_queue_req, brq.mrq); | |
2032 | struct request *req = mmc_queue_req_to_req(mqrq); | |
2033 | struct request_queue *q = req->q; | |
2034 | struct mmc_queue *mq = q->queuedata; | |
2035 | struct mmc_host *host = mq->card->host; | |
2036 | unsigned long flags; | |
2037 | ||
2038 | if (mmc_blk_rq_error(&mqrq->brq) || | |
2039 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
2040 | spin_lock_irqsave(&mq->lock, flags); | |
2041 | mq->recovery_needed = true; | |
2042 | mq->recovery_req = req; | |
2043 | spin_unlock_irqrestore(&mq->lock, flags); | |
2044 | ||
2045 | host->cqe_ops->cqe_recovery_start(host); | |
2046 | ||
2047 | schedule_work(&mq->recovery_work); | |
2048 | return; | |
2049 | } | |
2050 | ||
2051 | mmc_blk_rw_reset_success(mq, req); | |
2052 | ||
2053 | /* | |
2054 | * Block layer timeouts race with completions which means the normal | |
2055 | * completion path cannot be used during recovery. | |
2056 | */ | |
2057 | if (mq->in_recovery) | |
2058 | mmc_blk_cqe_complete_rq(mq, req); | |
15f73f5b | 2059 | else if (likely(!blk_should_fake_timeout(req->q))) |
511ce378 BW |
2060 | blk_mq_complete_request(req); |
2061 | } | |
2062 | ||
81196976 AH |
2063 | void mmc_blk_mq_complete(struct request *req) |
2064 | { | |
2065 | struct mmc_queue *mq = req->q->queuedata; | |
407a1c57 | 2066 | struct mmc_host *host = mq->card->host; |
81196976 | 2067 | |
407a1c57 | 2068 | if (host->cqe_enabled) |
1e8e55b6 | 2069 | mmc_blk_cqe_complete_rq(mq, req); |
15f73f5b | 2070 | else if (likely(!blk_should_fake_timeout(req->q))) |
1e8e55b6 | 2071 | mmc_blk_mq_complete_rq(mq, req); |
81196976 AH |
2072 | } |
2073 | ||
2074 | static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, | |
2075 | struct request *req) | |
2076 | { | |
2077 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
88a51646 | 2078 | struct mmc_host *host = mq->card->host; |
81196976 | 2079 | |
88a51646 AH |
2080 | if (mmc_blk_rq_error(&mqrq->brq) || |
2081 | mmc_blk_card_busy(mq->card, req)) { | |
2082 | mmc_blk_mq_rw_recovery(mq, req); | |
2083 | } else { | |
2084 | mmc_blk_rw_reset_success(mq, req); | |
2085 | mmc_retune_release(host); | |
2086 | } | |
81196976 AH |
2087 | |
2088 | mmc_blk_urgent_bkops(mq, mqrq); | |
2089 | } | |
2090 | ||
2091 | static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) | |
2092 | { | |
81196976 AH |
2093 | unsigned long flags; |
2094 | bool put_card; | |
2095 | ||
f5d72c5c | 2096 | spin_lock_irqsave(&mq->lock, flags); |
81196976 AH |
2097 | |
2098 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
2099 | ||
2100 | put_card = (mmc_tot_in_flight(mq) == 0); | |
2101 | ||
f5d72c5c | 2102 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2103 | |
2104 | if (put_card) | |
2105 | mmc_put_card(mq->card, &mq->ctx); | |
2106 | } | |
2107 | ||
639d3531 SAS |
2108 | static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req, |
2109 | bool can_sleep) | |
81196976 AH |
2110 | { |
2111 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2112 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
2113 | struct mmc_host *host = mq->card->host; | |
2114 | ||
2115 | mmc_post_req(host, mrq, 0); | |
2116 | ||
10f21df4 AH |
2117 | /* |
2118 | * Block layer timeouts race with completions which means the normal | |
2119 | * completion path cannot be used during recovery. | |
2120 | */ | |
639d3531 | 2121 | if (mq->in_recovery) { |
10f21df4 | 2122 | mmc_blk_mq_complete_rq(mq, req); |
639d3531 SAS |
2123 | } else if (likely(!blk_should_fake_timeout(req->q))) { |
2124 | if (can_sleep) | |
2125 | blk_mq_complete_request_direct(req, mmc_blk_mq_complete); | |
2126 | else | |
2127 | blk_mq_complete_request(req); | |
2128 | } | |
81196976 AH |
2129 | |
2130 | mmc_blk_mq_dec_in_flight(mq, req); | |
2131 | } | |
2132 | ||
10f21df4 AH |
2133 | void mmc_blk_mq_recovery(struct mmc_queue *mq) |
2134 | { | |
2135 | struct request *req = mq->recovery_req; | |
2136 | struct mmc_host *host = mq->card->host; | |
2137 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2138 | ||
2139 | mq->recovery_req = NULL; | |
2140 | mq->rw_wait = false; | |
2141 | ||
2142 | if (mmc_blk_rq_error(&mqrq->brq)) { | |
2143 | mmc_retune_hold_now(host); | |
2144 | mmc_blk_mq_rw_recovery(mq, req); | |
2145 | } | |
2146 | ||
2147 | mmc_blk_urgent_bkops(mq, mqrq); | |
2148 | ||
639d3531 | 2149 | mmc_blk_mq_post_req(mq, req, true); |
10f21df4 AH |
2150 | } |
2151 | ||
81196976 AH |
2152 | static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, |
2153 | struct request **prev_req) | |
2154 | { | |
10f21df4 AH |
2155 | if (mmc_host_done_complete(mq->card->host)) |
2156 | return; | |
2157 | ||
81196976 AH |
2158 | mutex_lock(&mq->complete_lock); |
2159 | ||
2160 | if (!mq->complete_req) | |
2161 | goto out_unlock; | |
2162 | ||
2163 | mmc_blk_mq_poll_completion(mq, mq->complete_req); | |
2164 | ||
2165 | if (prev_req) | |
2166 | *prev_req = mq->complete_req; | |
2167 | else | |
639d3531 | 2168 | mmc_blk_mq_post_req(mq, mq->complete_req, true); |
81196976 AH |
2169 | |
2170 | mq->complete_req = NULL; | |
2171 | ||
2172 | out_unlock: | |
2173 | mutex_unlock(&mq->complete_lock); | |
2174 | } | |
2175 | ||
2176 | void mmc_blk_mq_complete_work(struct work_struct *work) | |
2177 | { | |
2178 | struct mmc_queue *mq = container_of(work, struct mmc_queue, | |
2179 | complete_work); | |
2180 | ||
2181 | mmc_blk_mq_complete_prev_req(mq, NULL); | |
2182 | } | |
2183 | ||
2184 | static void mmc_blk_mq_req_done(struct mmc_request *mrq) | |
2185 | { | |
2186 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
2187 | brq.mrq); | |
2188 | struct request *req = mmc_queue_req_to_req(mqrq); | |
2189 | struct request_queue *q = req->q; | |
2190 | struct mmc_queue *mq = q->queuedata; | |
10f21df4 | 2191 | struct mmc_host *host = mq->card->host; |
81196976 | 2192 | unsigned long flags; |
81196976 | 2193 | |
10f21df4 AH |
2194 | if (!mmc_host_done_complete(host)) { |
2195 | bool waiting; | |
81196976 | 2196 | |
10f21df4 AH |
2197 | /* |
2198 | * We cannot complete the request in this context, so record | |
2199 | * that there is a request to complete, and that a following | |
2200 | * request does not need to wait (although it does need to | |
2201 | * complete complete_req first). | |
2202 | */ | |
f5d72c5c | 2203 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2204 | mq->complete_req = req; |
2205 | mq->rw_wait = false; | |
2206 | waiting = mq->waiting; | |
f5d72c5c | 2207 | spin_unlock_irqrestore(&mq->lock, flags); |
10f21df4 AH |
2208 | |
2209 | /* | |
2210 | * If 'waiting' then the waiting task will complete this | |
2211 | * request, otherwise queue a work to do it. Note that | |
2212 | * complete_work may still race with the dispatch of a following | |
2213 | * request. | |
2214 | */ | |
2215 | if (waiting) | |
2216 | wake_up(&mq->wait); | |
2217 | else | |
dcf6e2e3 | 2218 | queue_work(mq->card->complete_wq, &mq->complete_work); |
10f21df4 AH |
2219 | |
2220 | return; | |
2221 | } | |
2222 | ||
2223 | /* Take the recovery path for errors or urgent background operations */ | |
2224 | if (mmc_blk_rq_error(&mqrq->brq) || | |
2225 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
f5d72c5c | 2226 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2227 | mq->recovery_needed = true; |
2228 | mq->recovery_req = req; | |
f5d72c5c | 2229 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 | 2230 | wake_up(&mq->wait); |
10f21df4 AH |
2231 | schedule_work(&mq->recovery_work); |
2232 | return; | |
2233 | } | |
2234 | ||
2235 | mmc_blk_rw_reset_success(mq, req); | |
2236 | ||
2237 | mq->rw_wait = false; | |
2238 | wake_up(&mq->wait); | |
2239 | ||
639d3531 SAS |
2240 | /* context unknown */ |
2241 | mmc_blk_mq_post_req(mq, req, false); | |
81196976 AH |
2242 | } |
2243 | ||
2244 | static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) | |
2245 | { | |
81196976 AH |
2246 | unsigned long flags; |
2247 | bool done; | |
2248 | ||
2249 | /* | |
10f21df4 AH |
2250 | * Wait while there is another request in progress, but not if recovery |
2251 | * is needed. Also indicate whether there is a request waiting to start. | |
81196976 | 2252 | */ |
f5d72c5c | 2253 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2254 | if (mq->recovery_needed) { |
2255 | *err = -EBUSY; | |
2256 | done = true; | |
2257 | } else { | |
2258 | done = !mq->rw_wait; | |
2259 | } | |
81196976 | 2260 | mq->waiting = !done; |
f5d72c5c | 2261 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2262 | |
2263 | return done; | |
2264 | } | |
2265 | ||
2266 | static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req) | |
2267 | { | |
2268 | int err = 0; | |
2269 | ||
2270 | wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err)); | |
2271 | ||
2272 | /* Always complete the previous request if there is one */ | |
2273 | mmc_blk_mq_complete_prev_req(mq, prev_req); | |
2274 | ||
2275 | return err; | |
2276 | } | |
2277 | ||
2278 | static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, | |
2279 | struct request *req) | |
2280 | { | |
2281 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2282 | struct mmc_host *host = mq->card->host; | |
2283 | struct request *prev_req = NULL; | |
2284 | int err = 0; | |
2285 | ||
2286 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
2287 | ||
2288 | mqrq->brq.mrq.done = mmc_blk_mq_req_done; | |
2289 | ||
2290 | mmc_pre_req(host, &mqrq->brq.mrq); | |
2291 | ||
2292 | err = mmc_blk_rw_wait(mq, &prev_req); | |
2293 | if (err) | |
2294 | goto out_post_req; | |
2295 | ||
2296 | mq->rw_wait = true; | |
2297 | ||
2298 | err = mmc_start_request(host, &mqrq->brq.mrq); | |
2299 | ||
2300 | if (prev_req) | |
639d3531 | 2301 | mmc_blk_mq_post_req(mq, prev_req, true); |
81196976 | 2302 | |
10f21df4 | 2303 | if (err) |
81196976 | 2304 | mq->rw_wait = false; |
10f21df4 AH |
2305 | |
2306 | /* Release re-tuning here where there is no synchronization required */ | |
2307 | if (err || mmc_host_done_complete(host)) | |
81196976 | 2308 | mmc_retune_release(host); |
81196976 AH |
2309 | |
2310 | out_post_req: | |
2311 | if (err) | |
2312 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
2313 | ||
2314 | return err; | |
2315 | } | |
2316 | ||
2317 | static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host) | |
2318 | { | |
407a1c57 | 2319 | if (host->cqe_enabled) |
1e8e55b6 AH |
2320 | return host->cqe_ops->cqe_wait_for_idle(host); |
2321 | ||
81196976 AH |
2322 | return mmc_blk_rw_wait(mq, NULL); |
2323 | } | |
2324 | ||
2325 | enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) | |
2326 | { | |
2327 | struct mmc_blk_data *md = mq->blkdata; | |
2328 | struct mmc_card *card = md->queue.card; | |
2329 | struct mmc_host *host = card->host; | |
2330 | int ret; | |
2331 | ||
2332 | ret = mmc_blk_part_switch(card, md->part_type); | |
2333 | if (ret) | |
2334 | return MMC_REQ_FAILED_TO_START; | |
2335 | ||
2336 | switch (mmc_issue_type(mq, req)) { | |
2337 | case MMC_ISSUE_SYNC: | |
2338 | ret = mmc_blk_wait_for_idle(mq, host); | |
2339 | if (ret) | |
2340 | return MMC_REQ_BUSY; | |
2341 | switch (req_op(req)) { | |
2342 | case REQ_OP_DRV_IN: | |
2343 | case REQ_OP_DRV_OUT: | |
2344 | mmc_blk_issue_drv_op(mq, req); | |
2345 | break; | |
2346 | case REQ_OP_DISCARD: | |
2347 | mmc_blk_issue_discard_rq(mq, req); | |
2348 | break; | |
2349 | case REQ_OP_SECURE_ERASE: | |
2350 | mmc_blk_issue_secdiscard_rq(mq, req); | |
2351 | break; | |
f7b6fc32 VW |
2352 | case REQ_OP_WRITE_ZEROES: |
2353 | mmc_blk_issue_trim_rq(mq, req); | |
2354 | break; | |
81196976 AH |
2355 | case REQ_OP_FLUSH: |
2356 | mmc_blk_issue_flush(mq, req); | |
2357 | break; | |
2358 | default: | |
2359 | WARN_ON_ONCE(1); | |
2360 | return MMC_REQ_FAILED_TO_START; | |
2361 | } | |
2362 | return MMC_REQ_FINISHED; | |
1e8e55b6 | 2363 | case MMC_ISSUE_DCMD: |
81196976 AH |
2364 | case MMC_ISSUE_ASYNC: |
2365 | switch (req_op(req)) { | |
1e8e55b6 | 2366 | case REQ_OP_FLUSH: |
97fce126 AA |
2367 | if (!mmc_cache_enabled(host)) { |
2368 | blk_mq_end_request(req, BLK_STS_OK); | |
2369 | return MMC_REQ_FINISHED; | |
2370 | } | |
1e8e55b6 AH |
2371 | ret = mmc_blk_cqe_issue_flush(mq, req); |
2372 | break; | |
81196976 AH |
2373 | case REQ_OP_READ: |
2374 | case REQ_OP_WRITE: | |
407a1c57 | 2375 | if (host->cqe_enabled) |
1e8e55b6 AH |
2376 | ret = mmc_blk_cqe_issue_rw_rq(mq, req); |
2377 | else | |
2378 | ret = mmc_blk_mq_issue_rw_rq(mq, req); | |
81196976 AH |
2379 | break; |
2380 | default: | |
2381 | WARN_ON_ONCE(1); | |
2382 | ret = -EINVAL; | |
2383 | } | |
2384 | if (!ret) | |
2385 | return MMC_REQ_STARTED; | |
2386 | return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START; | |
2387 | default: | |
2388 | WARN_ON_ONCE(1); | |
2389 | return MMC_REQ_FAILED_TO_START; | |
2390 | } | |
2391 | } | |
2392 | ||
a6f6c96b RK |
2393 | static inline int mmc_blk_readonly(struct mmc_card *card) |
2394 | { | |
2395 | return mmc_card_readonly(card) || | |
2396 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
2397 | } | |
2398 | ||
371a689f AW |
2399 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
2400 | struct device *parent, | |
2401 | sector_t size, | |
2402 | bool default_ro, | |
add710ea | 2403 | const char *subname, |
a94dcfce CH |
2404 | int area_type, |
2405 | unsigned int part_type) | |
1da177e4 LT |
2406 | { |
2407 | struct mmc_blk_data *md; | |
2408 | int devidx, ret; | |
ce999ed1 | 2409 | char cap_str[10]; |
08ebf903 MW |
2410 | bool cache_enabled = false; |
2411 | bool fua_enabled = false; | |
1da177e4 | 2412 | |
a04848c7 | 2413 | devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); |
e7b42769 SL |
2414 | if (devidx < 0) { |
2415 | /* | |
2416 | * We get -ENOSPC because there are no more any available | |
2417 | * devidx. The reason may be that, either userspace haven't yet | |
2418 | * unmounted the partitions, which postpones mmc_blk_release() | |
2419 | * from being called, or the device has more partitions than | |
2420 | * what we support. | |
2421 | */ | |
2422 | if (devidx == -ENOSPC) | |
2423 | dev_err(mmc_dev(card->host), | |
2424 | "no more device IDs available\n"); | |
2425 | ||
a04848c7 | 2426 | return ERR_PTR(devidx); |
e7b42769 | 2427 | } |
1da177e4 | 2428 | |
dd00cc48 | 2429 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
2430 | if (!md) { |
2431 | ret = -ENOMEM; | |
2432 | goto out; | |
2433 | } | |
1da177e4 | 2434 | |
add710ea JR |
2435 | md->area_type = area_type; |
2436 | ||
a6f6c96b RK |
2437 | /* |
2438 | * Set the read-only status based on the supported commands | |
2439 | * and the write protect switch. | |
2440 | */ | |
2441 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 2442 | |
607d968a CH |
2443 | md->disk = mmc_init_queue(&md->queue, card); |
2444 | if (IS_ERR(md->disk)) { | |
2445 | ret = PTR_ERR(md->disk); | |
a6f6c96b RK |
2446 | goto err_kfree; |
2447 | } | |
1da177e4 | 2448 | |
371a689f | 2449 | INIT_LIST_HEAD(&md->part); |
97548575 | 2450 | INIT_LIST_HEAD(&md->rpmbs); |
edb25572 SB |
2451 | kref_init(&md->kref); |
2452 | ||
7db3028e | 2453 | md->queue.blkdata = md; |
a94dcfce | 2454 | md->part_type = part_type; |
d2b18394 | 2455 | |
fe6b4c88 | 2456 | md->disk->major = MMC_BLOCK_MAJOR; |
1033d103 | 2457 | md->disk->minors = perdev_minors; |
5e71b7a6 | 2458 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
2459 | md->disk->fops = &mmc_bdops; |
2460 | md->disk->private_data = md; | |
307d8e6f | 2461 | md->parent = parent; |
371a689f | 2462 | set_disk_ro(md->disk, md->read_only || default_ro); |
f5b4d71f | 2463 | if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) |
79b0f79a | 2464 | md->disk->flags |= GENHD_FL_NO_PART; |
a6f6c96b RK |
2465 | |
2466 | /* | |
2467 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
2468 | * | |
2469 | * - be set for removable media with permanent block devices | |
2470 | * - be unset for removable block devices with permanent media | |
2471 | * | |
2472 | * Since MMC block devices clearly fall under the second | |
2473 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
2474 | * should use the block device creation/destruction hotplug | |
2475 | * messages to tell when the card is present. | |
2476 | */ | |
2477 | ||
f06c9153 | 2478 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
9aaf3437 | 2479 | "mmcblk%u%s", card->host->index, subname ? subname : ""); |
a6f6c96b | 2480 | |
371a689f | 2481 | set_capacity(md->disk, size); |
d0c97cfb | 2482 | |
f0d89972 | 2483 | if (mmc_host_cmd23(card->host)) { |
0ed50abb DG |
2484 | if ((mmc_card_mmc(card) && |
2485 | card->csd.mmca_vsn >= CSD_SPEC_VER_3) || | |
f0d89972 AW |
2486 | (mmc_card_sd(card) && |
2487 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
2488 | md->flags |= MMC_BLK_CMD23; | |
2489 | } | |
d0c97cfb | 2490 | |
08ebf903 | 2491 | if (md->flags & MMC_BLK_CMD23 && |
d0c97cfb AW |
2492 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || |
2493 | card->ext_csd.rel_sectors)) { | |
2494 | md->flags |= MMC_BLK_REL_WR; | |
08ebf903 MW |
2495 | fua_enabled = true; |
2496 | cache_enabled = true; | |
d0c97cfb | 2497 | } |
08ebf903 MW |
2498 | if (mmc_cache_enabled(card->host)) |
2499 | cache_enabled = true; | |
2500 | ||
2501 | blk_queue_write_cache(md->queue.queue, cache_enabled, fua_enabled); | |
d0c97cfb | 2502 | |
ce999ed1 UH |
2503 | string_get_size((u64)size, 512, STRING_UNITS_2, |
2504 | cap_str, sizeof(cap_str)); | |
2505 | pr_info("%s: %s %s %s %s\n", | |
2506 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), | |
2507 | cap_str, md->read_only ? "(ro)" : ""); | |
2508 | ||
a94dcfce CH |
2509 | /* used in ->open, must be set before add_disk: */ |
2510 | if (area_type == MMC_BLK_DATA_AREA_MAIN) | |
2511 | dev_set_drvdata(&card->dev, md); | |
9c1aaec4 LC |
2512 | ret = device_add_disk(md->parent, md->disk, mmc_disk_attr_groups); |
2513 | if (ret) | |
bf14fad1 | 2514 | goto err_put_disk; |
371a689f AW |
2515 | return md; |
2516 | ||
bf14fad1 ML |
2517 | err_put_disk: |
2518 | put_disk(md->disk); | |
9c1aaec4 | 2519 | blk_mq_free_tag_set(&md->queue.tag_set); |
371a689f AW |
2520 | err_kfree: |
2521 | kfree(md); | |
2522 | out: | |
a04848c7 | 2523 | ida_simple_remove(&mmc_blk_ida, devidx); |
371a689f AW |
2524 | return ERR_PTR(ret); |
2525 | } | |
2526 | ||
2527 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
2528 | { | |
2529 | sector_t size; | |
a6f6c96b | 2530 | |
85a18ad9 PO |
2531 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
2532 | /* | |
2533 | * The EXT_CSD sector count is in number or 512 byte | |
2534 | * sectors. | |
2535 | */ | |
371a689f | 2536 | size = card->ext_csd.sectors; |
85a18ad9 PO |
2537 | } else { |
2538 | /* | |
2539 | * The CSD capacity field is in units of read_blkbits. | |
2540 | * set_capacity takes units of 512 bytes. | |
2541 | */ | |
087de9ed KM |
2542 | size = (typeof(sector_t))card->csd.capacity |
2543 | << (card->csd.read_blkbits - 9); | |
85a18ad9 | 2544 | } |
371a689f | 2545 | |
7a30f2af | 2546 | return mmc_blk_alloc_req(card, &card->dev, size, false, NULL, |
a94dcfce | 2547 | MMC_BLK_DATA_AREA_MAIN, 0); |
371a689f | 2548 | } |
a6f6c96b | 2549 | |
371a689f AW |
2550 | static int mmc_blk_alloc_part(struct mmc_card *card, |
2551 | struct mmc_blk_data *md, | |
2552 | unsigned int part_type, | |
2553 | sector_t size, | |
2554 | bool default_ro, | |
add710ea JR |
2555 | const char *subname, |
2556 | int area_type) | |
371a689f | 2557 | { |
371a689f AW |
2558 | struct mmc_blk_data *part_md; |
2559 | ||
2560 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
a94dcfce | 2561 | subname, area_type, part_type); |
371a689f AW |
2562 | if (IS_ERR(part_md)) |
2563 | return PTR_ERR(part_md); | |
371a689f AW |
2564 | list_add(&part_md->part, &md->part); |
2565 | ||
371a689f AW |
2566 | return 0; |
2567 | } | |
2568 | ||
97548575 LW |
2569 | /** |
2570 | * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev | |
2571 | * @filp: the character device file | |
2572 | * @cmd: the ioctl() command | |
2573 | * @arg: the argument from userspace | |
2574 | * | |
2575 | * This will essentially just redirect the ioctl()s coming in over to | |
2576 | * the main block device spawning the RPMB character device. | |
2577 | */ | |
2578 | static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd, | |
2579 | unsigned long arg) | |
2580 | { | |
2581 | struct mmc_rpmb_data *rpmb = filp->private_data; | |
2582 | int ret; | |
2583 | ||
2584 | switch (cmd) { | |
2585 | case MMC_IOC_CMD: | |
2586 | ret = mmc_blk_ioctl_cmd(rpmb->md, | |
2587 | (struct mmc_ioc_cmd __user *)arg, | |
2588 | rpmb); | |
2589 | break; | |
2590 | case MMC_IOC_MULTI_CMD: | |
2591 | ret = mmc_blk_ioctl_multi_cmd(rpmb->md, | |
2592 | (struct mmc_ioc_multi_cmd __user *)arg, | |
2593 | rpmb); | |
2594 | break; | |
2595 | default: | |
2596 | ret = -EINVAL; | |
2597 | break; | |
2598 | } | |
2599 | ||
b25b750d | 2600 | return ret; |
97548575 LW |
2601 | } |
2602 | ||
2603 | #ifdef CONFIG_COMPAT | |
2604 | static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd, | |
2605 | unsigned long arg) | |
2606 | { | |
2607 | return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
2608 | } | |
2609 | #endif | |
2610 | ||
2611 | static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp) | |
2612 | { | |
2613 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2614 | struct mmc_rpmb_data, chrdev); | |
2615 | ||
2616 | get_device(&rpmb->dev); | |
2617 | filp->private_data = rpmb; | |
1c87f735 | 2618 | mmc_blk_get(rpmb->md->disk); |
97548575 LW |
2619 | |
2620 | return nonseekable_open(inode, filp); | |
2621 | } | |
2622 | ||
2623 | static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp) | |
2624 | { | |
2625 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2626 | struct mmc_rpmb_data, chrdev); | |
2627 | ||
1c87f735 | 2628 | mmc_blk_put(rpmb->md); |
202500d2 | 2629 | put_device(&rpmb->dev); |
97548575 LW |
2630 | |
2631 | return 0; | |
2632 | } | |
2633 | ||
2634 | static const struct file_operations mmc_rpmb_fileops = { | |
2635 | .release = mmc_rpmb_chrdev_release, | |
2636 | .open = mmc_rpmb_chrdev_open, | |
2637 | .owner = THIS_MODULE, | |
2638 | .llseek = no_llseek, | |
2639 | .unlocked_ioctl = mmc_rpmb_ioctl, | |
2640 | #ifdef CONFIG_COMPAT | |
2641 | .compat_ioctl = mmc_rpmb_ioctl_compat, | |
2642 | #endif | |
2643 | }; | |
2644 | ||
1c87f735 LW |
2645 | static void mmc_blk_rpmb_device_release(struct device *dev) |
2646 | { | |
2647 | struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); | |
2648 | ||
2649 | ida_simple_remove(&mmc_rpmb_ida, rpmb->id); | |
2650 | kfree(rpmb); | |
2651 | } | |
97548575 LW |
2652 | |
2653 | static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, | |
2654 | struct mmc_blk_data *md, | |
2655 | unsigned int part_index, | |
2656 | sector_t size, | |
2657 | const char *subname) | |
2658 | { | |
2659 | int devidx, ret; | |
2660 | char rpmb_name[DISK_NAME_LEN]; | |
2661 | char cap_str[10]; | |
2662 | struct mmc_rpmb_data *rpmb; | |
2663 | ||
2664 | /* This creates the minor number for the RPMB char device */ | |
2665 | devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL); | |
2666 | if (devidx < 0) | |
2667 | return devidx; | |
2668 | ||
2669 | rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL); | |
1c87f735 LW |
2670 | if (!rpmb) { |
2671 | ida_simple_remove(&mmc_rpmb_ida, devidx); | |
97548575 | 2672 | return -ENOMEM; |
1c87f735 | 2673 | } |
97548575 LW |
2674 | |
2675 | snprintf(rpmb_name, sizeof(rpmb_name), | |
2676 | "mmcblk%u%s", card->host->index, subname ? subname : ""); | |
2677 | ||
2678 | rpmb->id = devidx; | |
2679 | rpmb->part_index = part_index; | |
2680 | rpmb->dev.init_name = rpmb_name; | |
2681 | rpmb->dev.bus = &mmc_rpmb_bus_type; | |
2682 | rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id); | |
2683 | rpmb->dev.parent = &card->dev; | |
1c87f735 | 2684 | rpmb->dev.release = mmc_blk_rpmb_device_release; |
97548575 LW |
2685 | device_initialize(&rpmb->dev); |
2686 | dev_set_drvdata(&rpmb->dev, rpmb); | |
2687 | rpmb->md = md; | |
2688 | ||
2689 | cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops); | |
2690 | rpmb->chrdev.owner = THIS_MODULE; | |
2691 | ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev); | |
2692 | if (ret) { | |
2693 | pr_err("%s: could not add character device\n", rpmb_name); | |
1c87f735 | 2694 | goto out_put_device; |
97548575 LW |
2695 | } |
2696 | ||
2697 | list_add(&rpmb->node, &md->rpmbs); | |
2698 | ||
2699 | string_get_size((u64)size, 512, STRING_UNITS_2, | |
2700 | cap_str, sizeof(cap_str)); | |
2701 | ||
ce999ed1 UH |
2702 | pr_info("%s: %s %s %s, chardev (%d:%d)\n", |
2703 | rpmb_name, mmc_card_id(card), mmc_card_name(card), cap_str, | |
97548575 LW |
2704 | MAJOR(mmc_rpmb_devt), rpmb->id); |
2705 | ||
2706 | return 0; | |
2707 | ||
1c87f735 LW |
2708 | out_put_device: |
2709 | put_device(&rpmb->dev); | |
97548575 LW |
2710 | return ret; |
2711 | } | |
2712 | ||
2713 | static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb) | |
1c87f735 | 2714 | |
97548575 LW |
2715 | { |
2716 | cdev_device_del(&rpmb->chrdev, &rpmb->dev); | |
1c87f735 | 2717 | put_device(&rpmb->dev); |
97548575 LW |
2718 | } |
2719 | ||
e0c368d5 NJ |
2720 | /* MMC Physical partitions consist of two boot partitions and |
2721 | * up to four general purpose partitions. | |
2722 | * For each partition enabled in EXT_CSD a block device will be allocatedi | |
2723 | * to provide access to the partition. | |
2724 | */ | |
2725 | ||
371a689f AW |
2726 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) |
2727 | { | |
97548575 | 2728 | int idx, ret; |
371a689f AW |
2729 | |
2730 | if (!mmc_card_mmc(card)) | |
2731 | return 0; | |
2732 | ||
e0c368d5 | 2733 | for (idx = 0; idx < card->nr_parts; idx++) { |
97548575 LW |
2734 | if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) { |
2735 | /* | |
2736 | * RPMB partitions does not provide block access, they | |
2737 | * are only accessed using ioctl():s. Thus create | |
2738 | * special RPMB block devices that do not have a | |
2739 | * backing block queue for these. | |
2740 | */ | |
2741 | ret = mmc_blk_alloc_rpmb_part(card, md, | |
2742 | card->part[idx].part_cfg, | |
2743 | card->part[idx].size >> 9, | |
2744 | card->part[idx].name); | |
2745 | if (ret) | |
2746 | return ret; | |
2747 | } else if (card->part[idx].size) { | |
e0c368d5 NJ |
2748 | ret = mmc_blk_alloc_part(card, md, |
2749 | card->part[idx].part_cfg, | |
2750 | card->part[idx].size >> 9, | |
2751 | card->part[idx].force_ro, | |
add710ea JR |
2752 | card->part[idx].name, |
2753 | card->part[idx].area_type); | |
e0c368d5 NJ |
2754 | if (ret) |
2755 | return ret; | |
2756 | } | |
371a689f AW |
2757 | } |
2758 | ||
97548575 | 2759 | return 0; |
1da177e4 LT |
2760 | } |
2761 | ||
371a689f AW |
2762 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
2763 | { | |
a94dcfce CH |
2764 | /* |
2765 | * Flush remaining requests and free queues. It is freeing the queue | |
2766 | * that stops new requests from being accepted. | |
2767 | */ | |
2768 | del_gendisk(md->disk); | |
2769 | mmc_cleanup_queue(&md->queue); | |
2770 | mmc_blk_put(md); | |
371a689f AW |
2771 | } |
2772 | ||
2773 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
2774 | struct mmc_blk_data *md) | |
2775 | { | |
2776 | struct list_head *pos, *q; | |
2777 | struct mmc_blk_data *part_md; | |
97548575 | 2778 | struct mmc_rpmb_data *rpmb; |
371a689f | 2779 | |
97548575 LW |
2780 | /* Remove RPMB partitions */ |
2781 | list_for_each_safe(pos, q, &md->rpmbs) { | |
2782 | rpmb = list_entry(pos, struct mmc_rpmb_data, node); | |
2783 | list_del(pos); | |
2784 | mmc_blk_remove_rpmb_part(rpmb); | |
2785 | } | |
2786 | /* Remove block partitions */ | |
371a689f AW |
2787 | list_for_each_safe(pos, q, &md->part) { |
2788 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
2789 | list_del(pos); | |
2790 | mmc_blk_remove_req(part_md); | |
2791 | } | |
2792 | } | |
2793 | ||
627c3ccf LW |
2794 | #ifdef CONFIG_DEBUG_FS |
2795 | ||
2796 | static int mmc_dbg_card_status_get(void *data, u64 *val) | |
2797 | { | |
2798 | struct mmc_card *card = data; | |
2799 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2800 | struct mmc_queue *mq = &md->queue; | |
2801 | struct request *req; | |
2802 | int ret; | |
2803 | ||
2804 | /* Ask the block layer about the card status */ | |
0bf6d96c | 2805 | req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2806 | if (IS_ERR(req)) |
2807 | return PTR_ERR(req); | |
627c3ccf | 2808 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS; |
b84ba30b | 2809 | blk_execute_rq(req, false); |
627c3ccf LW |
2810 | ret = req_to_mmc_queue_req(req)->drv_op_result; |
2811 | if (ret >= 0) { | |
2812 | *val = ret; | |
2813 | ret = 0; | |
2814 | } | |
0bf6d96c | 2815 | blk_mq_free_request(req); |
627c3ccf LW |
2816 | |
2817 | return ret; | |
2818 | } | |
f6a3d9d9 Y |
2819 | DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get, |
2820 | NULL, "%08llx\n"); | |
627c3ccf LW |
2821 | |
2822 | /* That is two digits * 512 + 1 for newline */ | |
2823 | #define EXT_CSD_STR_LEN 1025 | |
2824 | ||
2825 | static int mmc_ext_csd_open(struct inode *inode, struct file *filp) | |
2826 | { | |
2827 | struct mmc_card *card = inode->i_private; | |
2828 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2829 | struct mmc_queue *mq = &md->queue; | |
2830 | struct request *req; | |
2831 | char *buf; | |
2832 | ssize_t n = 0; | |
2833 | u8 *ext_csd; | |
2834 | int err, i; | |
2835 | ||
2836 | buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL); | |
2837 | if (!buf) | |
2838 | return -ENOMEM; | |
2839 | ||
2840 | /* Ask the block layer for the EXT CSD */ | |
0bf6d96c | 2841 | req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2842 | if (IS_ERR(req)) { |
2843 | err = PTR_ERR(req); | |
2844 | goto out_free; | |
2845 | } | |
627c3ccf LW |
2846 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD; |
2847 | req_to_mmc_queue_req(req)->drv_op_data = &ext_csd; | |
b84ba30b | 2848 | blk_execute_rq(req, false); |
627c3ccf | 2849 | err = req_to_mmc_queue_req(req)->drv_op_result; |
0bf6d96c | 2850 | blk_mq_free_request(req); |
627c3ccf LW |
2851 | if (err) { |
2852 | pr_err("FAILED %d\n", err); | |
2853 | goto out_free; | |
2854 | } | |
2855 | ||
2856 | for (i = 0; i < 512; i++) | |
2857 | n += sprintf(buf + n, "%02x", ext_csd[i]); | |
2858 | n += sprintf(buf + n, "\n"); | |
2859 | ||
2860 | if (n != EXT_CSD_STR_LEN) { | |
2861 | err = -EINVAL; | |
0be55579 | 2862 | kfree(ext_csd); |
627c3ccf LW |
2863 | goto out_free; |
2864 | } | |
2865 | ||
2866 | filp->private_data = buf; | |
2867 | kfree(ext_csd); | |
2868 | return 0; | |
2869 | ||
2870 | out_free: | |
2871 | kfree(buf); | |
2872 | return err; | |
2873 | } | |
2874 | ||
2875 | static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf, | |
2876 | size_t cnt, loff_t *ppos) | |
2877 | { | |
2878 | char *buf = filp->private_data; | |
2879 | ||
2880 | return simple_read_from_buffer(ubuf, cnt, ppos, | |
2881 | buf, EXT_CSD_STR_LEN); | |
2882 | } | |
2883 | ||
2884 | static int mmc_ext_csd_release(struct inode *inode, struct file *file) | |
2885 | { | |
2886 | kfree(file->private_data); | |
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | static const struct file_operations mmc_dbg_ext_csd_fops = { | |
2891 | .open = mmc_ext_csd_open, | |
2892 | .read = mmc_ext_csd_read, | |
2893 | .release = mmc_ext_csd_release, | |
2894 | .llseek = default_llseek, | |
2895 | }; | |
2896 | ||
f9f0da98 | 2897 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2898 | { |
2899 | struct dentry *root; | |
2900 | ||
2901 | if (!card->debugfs_root) | |
2902 | return 0; | |
2903 | ||
2904 | root = card->debugfs_root; | |
2905 | ||
2906 | if (mmc_card_mmc(card) || mmc_card_sd(card)) { | |
f9f0da98 | 2907 | md->status_dentry = |
f6a3d9d9 Y |
2908 | debugfs_create_file_unsafe("status", 0400, root, |
2909 | card, | |
2910 | &mmc_dbg_card_status_fops); | |
f9f0da98 | 2911 | if (!md->status_dentry) |
627c3ccf LW |
2912 | return -EIO; |
2913 | } | |
2914 | ||
2915 | if (mmc_card_mmc(card)) { | |
f9f0da98 AH |
2916 | md->ext_csd_dentry = |
2917 | debugfs_create_file("ext_csd", S_IRUSR, root, card, | |
2918 | &mmc_dbg_ext_csd_fops); | |
2919 | if (!md->ext_csd_dentry) | |
627c3ccf LW |
2920 | return -EIO; |
2921 | } | |
2922 | ||
2923 | return 0; | |
2924 | } | |
2925 | ||
f9f0da98 AH |
2926 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2927 | struct mmc_blk_data *md) | |
2928 | { | |
2929 | if (!card->debugfs_root) | |
2930 | return; | |
2931 | ||
2932 | if (!IS_ERR_OR_NULL(md->status_dentry)) { | |
2933 | debugfs_remove(md->status_dentry); | |
2934 | md->status_dentry = NULL; | |
2935 | } | |
2936 | ||
2937 | if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) { | |
2938 | debugfs_remove(md->ext_csd_dentry); | |
2939 | md->ext_csd_dentry = NULL; | |
2940 | } | |
2941 | } | |
627c3ccf LW |
2942 | |
2943 | #else | |
2944 | ||
f9f0da98 | 2945 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2946 | { |
2947 | return 0; | |
2948 | } | |
2949 | ||
f9f0da98 AH |
2950 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2951 | struct mmc_blk_data *md) | |
2952 | { | |
2953 | } | |
2954 | ||
627c3ccf LW |
2955 | #endif /* CONFIG_DEBUG_FS */ |
2956 | ||
96541bac | 2957 | static int mmc_blk_probe(struct mmc_card *card) |
1da177e4 | 2958 | { |
a94dcfce | 2959 | struct mmc_blk_data *md; |
6f1d3247 | 2960 | int ret = 0; |
a7bbb573 | 2961 | |
912490db PO |
2962 | /* |
2963 | * Check that the card supports the command class(es) we need. | |
2964 | */ | |
2965 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
2966 | return -ENODEV; |
2967 | ||
8c7cdbf9 | 2968 | mmc_fixup_device(card, mmc_blk_fixups); |
5204d00f | 2969 | |
dcf6e2e3 ZH |
2970 | card->complete_wq = alloc_workqueue("mmc_complete", |
2971 | WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); | |
1d848c28 | 2972 | if (!card->complete_wq) { |
dcf6e2e3 ZH |
2973 | pr_err("Failed to create mmc completion workqueue"); |
2974 | return -ENOMEM; | |
2975 | } | |
2976 | ||
1da177e4 | 2977 | md = mmc_blk_alloc(card); |
6f1d3247 UH |
2978 | if (IS_ERR(md)) { |
2979 | ret = PTR_ERR(md); | |
2980 | goto out_free; | |
2981 | } | |
1da177e4 | 2982 | |
6f1d3247 UH |
2983 | ret = mmc_blk_alloc_parts(card, md); |
2984 | if (ret) | |
371a689f AW |
2985 | goto out; |
2986 | ||
627c3ccf | 2987 | /* Add two debugfs entries */ |
f9f0da98 | 2988 | mmc_blk_add_debugfs(card, md); |
627c3ccf | 2989 | |
e94cfef6 UH |
2990 | pm_runtime_set_autosuspend_delay(&card->dev, 3000); |
2991 | pm_runtime_use_autosuspend(&card->dev); | |
2992 | ||
2993 | /* | |
2994 | * Don't enable runtime PM for SD-combo cards here. Leave that | |
2995 | * decision to be taken during the SDIO init sequence instead. | |
2996 | */ | |
3beb0ab5 | 2997 | if (!mmc_card_sd_combo(card)) { |
e94cfef6 UH |
2998 | pm_runtime_set_active(&card->dev); |
2999 | pm_runtime_enable(&card->dev); | |
3000 | } | |
3001 | ||
1da177e4 LT |
3002 | return 0; |
3003 | ||
6f1d3247 | 3004 | out: |
371a689f AW |
3005 | mmc_blk_remove_parts(card, md); |
3006 | mmc_blk_remove_req(md); | |
6f1d3247 UH |
3007 | out_free: |
3008 | destroy_workqueue(card->complete_wq); | |
3009 | return ret; | |
1da177e4 LT |
3010 | } |
3011 | ||
96541bac | 3012 | static void mmc_blk_remove(struct mmc_card *card) |
1da177e4 | 3013 | { |
96541bac | 3014 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 | 3015 | |
f9f0da98 | 3016 | mmc_blk_remove_debugfs(card, md); |
371a689f | 3017 | mmc_blk_remove_parts(card, md); |
e94cfef6 | 3018 | pm_runtime_get_sync(&card->dev); |
65f9e20e SL |
3019 | if (md->part_curr != md->part_type) { |
3020 | mmc_claim_host(card->host); | |
3021 | mmc_blk_part_switch(card, md->part_type); | |
3022 | mmc_release_host(card->host); | |
3023 | } | |
3beb0ab5 | 3024 | if (!mmc_card_sd_combo(card)) |
e94cfef6 UH |
3025 | pm_runtime_disable(&card->dev); |
3026 | pm_runtime_put_noidle(&card->dev); | |
371a689f | 3027 | mmc_blk_remove_req(md); |
96541bac | 3028 | dev_set_drvdata(&card->dev, NULL); |
dcf6e2e3 | 3029 | destroy_workqueue(card->complete_wq); |
1da177e4 LT |
3030 | } |
3031 | ||
96541bac | 3032 | static int _mmc_blk_suspend(struct mmc_card *card) |
1da177e4 | 3033 | { |
371a689f | 3034 | struct mmc_blk_data *part_md; |
96541bac | 3035 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 LT |
3036 | |
3037 | if (md) { | |
3038 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
3039 | list_for_each_entry(part_md, &md->part, part) { |
3040 | mmc_queue_suspend(&part_md->queue); | |
3041 | } | |
1da177e4 LT |
3042 | } |
3043 | return 0; | |
3044 | } | |
3045 | ||
96541bac | 3046 | static void mmc_blk_shutdown(struct mmc_card *card) |
76287748 | 3047 | { |
96541bac | 3048 | _mmc_blk_suspend(card); |
76287748 UH |
3049 | } |
3050 | ||
0967edc6 UH |
3051 | #ifdef CONFIG_PM_SLEEP |
3052 | static int mmc_blk_suspend(struct device *dev) | |
76287748 | 3053 | { |
96541bac UH |
3054 | struct mmc_card *card = mmc_dev_to_card(dev); |
3055 | ||
3056 | return _mmc_blk_suspend(card); | |
76287748 UH |
3057 | } |
3058 | ||
0967edc6 | 3059 | static int mmc_blk_resume(struct device *dev) |
1da177e4 | 3060 | { |
371a689f | 3061 | struct mmc_blk_data *part_md; |
fc95e30b | 3062 | struct mmc_blk_data *md = dev_get_drvdata(dev); |
1da177e4 LT |
3063 | |
3064 | if (md) { | |
371a689f AW |
3065 | /* |
3066 | * Resume involves the card going into idle state, | |
3067 | * so current partition is always the main one. | |
3068 | */ | |
3069 | md->part_curr = md->part_type; | |
1da177e4 | 3070 | mmc_queue_resume(&md->queue); |
371a689f AW |
3071 | list_for_each_entry(part_md, &md->part, part) { |
3072 | mmc_queue_resume(&part_md->queue); | |
3073 | } | |
1da177e4 LT |
3074 | } |
3075 | return 0; | |
3076 | } | |
1da177e4 LT |
3077 | #endif |
3078 | ||
0967edc6 UH |
3079 | static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume); |
3080 | ||
96541bac UH |
3081 | static struct mmc_driver mmc_driver = { |
3082 | .drv = { | |
3083 | .name = "mmcblk", | |
3084 | .pm = &mmc_blk_pm_ops, | |
3085 | }, | |
1da177e4 LT |
3086 | .probe = mmc_blk_probe, |
3087 | .remove = mmc_blk_remove, | |
76287748 | 3088 | .shutdown = mmc_blk_shutdown, |
1da177e4 LT |
3089 | }; |
3090 | ||
3091 | static int __init mmc_blk_init(void) | |
3092 | { | |
9d4e98e9 | 3093 | int res; |
1da177e4 | 3094 | |
97548575 LW |
3095 | res = bus_register(&mmc_rpmb_bus_type); |
3096 | if (res < 0) { | |
3097 | pr_err("mmcblk: could not register RPMB bus type\n"); | |
3098 | return res; | |
3099 | } | |
3100 | res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb"); | |
3101 | if (res < 0) { | |
3102 | pr_err("mmcblk: failed to allocate rpmb chrdev region\n"); | |
3103 | goto out_bus_unreg; | |
3104 | } | |
3105 | ||
5e71b7a6 OJ |
3106 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
3107 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
3108 | ||
a26eba61 | 3109 | max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors); |
5e71b7a6 | 3110 | |
fe6b4c88 PO |
3111 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
3112 | if (res) | |
97548575 | 3113 | goto out_chrdev_unreg; |
1da177e4 | 3114 | |
9d4e98e9 AM |
3115 | res = mmc_register_driver(&mmc_driver); |
3116 | if (res) | |
97548575 | 3117 | goto out_blkdev_unreg; |
1da177e4 | 3118 | |
9d4e98e9 | 3119 | return 0; |
97548575 LW |
3120 | |
3121 | out_blkdev_unreg: | |
9d4e98e9 | 3122 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 LW |
3123 | out_chrdev_unreg: |
3124 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); | |
3125 | out_bus_unreg: | |
3126 | bus_unregister(&mmc_rpmb_bus_type); | |
1da177e4 LT |
3127 | return res; |
3128 | } | |
3129 | ||
3130 | static void __exit mmc_blk_exit(void) | |
3131 | { | |
3132 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 3133 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 | 3134 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); |
d0a0852b | 3135 | bus_unregister(&mmc_rpmb_bus_type); |
1da177e4 LT |
3136 | } |
3137 | ||
3138 | module_init(mmc_blk_init); | |
3139 | module_exit(mmc_blk_exit); | |
3140 | ||
3141 | MODULE_LICENSE("GPL"); | |
3142 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
3143 |