Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/mmc/mmcsd.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Bernd Walter. All rights reserved. 5 * Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org> 6 * Copyright (c) 2017 Marius Strobl <marius@FreeBSD.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Portions of this software may have been developed with reference to 29 * the SD Simplified Specification. The following disclaimer may apply: 30 * 31 * The following conditions apply to the release of the simplified 32 * specification ("Simplified Specification") by the SD Card Association and 33 * the SD Group. The Simplified Specification is a subset of the complete SD 34 * Specification which is owned by the SD Card Association and the SD 35 * Group. This Simplified Specification is provided on a non-confidential 36 * basis subject to the disclaimers below. Any implementation of the 37 * Simplified Specification may require a license from the SD Card 38 * Association, SD Group, SD-3C LLC or other third parties. 39 * 40 * Disclaimers: 41 * 42 * The information contained in the Simplified Specification is presented only 43 * as a standard specification for SD Cards and SD Host/Ancillary products and 44 * is provided "AS-IS" without any representations or warranties of any 45 * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD 46 * Card Association for any damages, any infringements of patents or other 47 * right of the SD Group, SD-3C LLC, the SD Card Association or any third 48 * parties, which may result from its use. No license is granted by 49 * implication, estoppel or otherwise under any patent or other rights of the 50 * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing 51 * herein shall be construed as an obligation by the SD Group, the SD-3C LLC 52 * or the SD Card Association to disclose or distribute any technical 53 * information, know-how or other confidential information to any third party. 54 */ 55 56 #include <sys/cdefs.h> 57 __FBSDID("$FreeBSD$"); 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/bio.h> 62 #include <sys/bus.h> 63 #include <sys/conf.h> 64 #include <sys/endian.h> 65 #include <sys/fcntl.h> 66 #include <sys/ioccom.h> 67 #include <sys/kernel.h> 68 #include <sys/kthread.h> 69 #include <sys/lock.h> 70 #include <sys/malloc.h> 71 #include <sys/module.h> 72 #include <sys/mutex.h> 73 #include <sys/priv.h> 74 #include <sys/slicer.h> 75 #include <sys/sysctl.h> 76 #include <sys/time.h> 77 78 #include <geom/geom.h> 79 #include <geom/geom_disk.h> 80 81 #include <dev/mmc/bridge.h> 82 #include <dev/mmc/mmc_ioctl.h> 83 #include <dev/mmc/mmc_subr.h> 84 #include <dev/mmc/mmcbrvar.h> 85 #include <dev/mmc/mmcreg.h> 86 #include <dev/mmc/mmcvar.h> 87 88 #include "mmcbus_if.h" 89 90 #if __FreeBSD_version < 800002 91 #define kproc_create kthread_create 92 #define kproc_exit kthread_exit 93 #endif 94 95 #define MMCSD_CMD_RETRIES 5 96 97 #define MMCSD_FMT_BOOT "mmcsd%dboot" 98 #define MMCSD_FMT_GP "mmcsd%dgp" 99 #define MMCSD_FMT_RPMB "mmcsd%drpmb" 100 #define MMCSD_LABEL_ENH "enh" 101 102 #define MMCSD_PART_NAMELEN (16 + 1) 103 104 struct mmcsd_softc; 105 106 struct mmcsd_part { 107 struct mtx disk_mtx; 108 struct mtx ioctl_mtx; 109 struct mmcsd_softc *sc; 110 struct disk *disk; 111 struct proc *p; 112 struct bio_queue_head bio_queue; 113 daddr_t eblock, eend; /* Range remaining after the last erase. */ 114 u_int cnt; 115 u_int type; 116 int running; 117 int suspend; 118 int ioctl; 119 bool ro; 120 char name[MMCSD_PART_NAMELEN]; 121 }; 122 123 struct mmcsd_softc { 124 device_t dev; 125 device_t mmcbus; 126 struct mmcsd_part *part[MMC_PART_MAX]; 127 enum mmc_card_mode mode; 128 u_int max_data; /* Maximum data size [blocks] */ 129 u_int erase_sector; /* Device native erase sector size [blocks] */ 130 uint8_t high_cap; /* High Capacity device (block addressed) */ 131 uint8_t part_curr; /* Partition currently switched to */ 132 uint8_t ext_csd[MMC_EXTCSD_SIZE]; 133 uint16_t rca; 134 uint32_t flags; 135 #define MMCSD_INAND_CMD38 0x0001 136 #define MMCSD_USE_TRIM 0x0002 137 #define MMCSD_FLUSH_CACHE 0x0004 138 #define MMCSD_DIRTY 0x0008 139 uint32_t cmd6_time; /* Generic switch timeout [us] */ 140 uint32_t part_time; /* Partition switch timeout [us] */ 141 off_t enh_base; /* Enhanced user data area slice base ... */ 142 off_t enh_size; /* ... and size [bytes] */ 143 int log_count; 144 struct timeval log_time; 145 struct cdev *rpmb_dev; 146 }; 147 148 static const char *errmsg[] = 149 { 150 "None", 151 "Timeout", 152 "Bad CRC", 153 "Fifo", 154 "Failed", 155 "Invalid", 156 "NO MEMORY" 157 }; 158 159 static SYSCTL_NODE(_hw, OID_AUTO, mmcsd, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 160 "mmcsd driver"); 161 162 static int mmcsd_cache = 1; 163 SYSCTL_INT(_hw_mmcsd, OID_AUTO, cache, CTLFLAG_RDTUN, &mmcsd_cache, 0, 164 "Device R/W cache enabled if present"); 165 166 #define LOG_PPS 5 /* Log no more than 5 errors per second. */ 167 168 /* bus entry points */ 169 static int mmcsd_attach(device_t dev); 170 static int mmcsd_detach(device_t dev); 171 static int mmcsd_probe(device_t dev); 172 static int mmcsd_shutdown(device_t dev); 173 174 /* disk routines */ 175 static int mmcsd_close(struct disk *dp); 176 static int mmcsd_dump(void *arg, void *virtual, off_t offset, size_t length); 177 static int mmcsd_getattr(struct bio *); 178 static int mmcsd_ioctl_disk(struct disk *disk, u_long cmd, void *data, 179 int fflag, struct thread *td); 180 static void mmcsd_strategy(struct bio *bp); 181 static void mmcsd_task(void *arg); 182 183 /* RMPB cdev interface */ 184 static int mmcsd_ioctl_rpmb(struct cdev *dev, u_long cmd, caddr_t data, 185 int fflag, struct thread *td); 186 187 static void mmcsd_add_part(struct mmcsd_softc *sc, u_int type, 188 const char *name, u_int cnt, off_t media_size, bool ro); 189 static int mmcsd_bus_bit_width(device_t dev); 190 static daddr_t mmcsd_delete(struct mmcsd_part *part, struct bio *bp); 191 static const char *mmcsd_errmsg(int e); 192 static int mmcsd_flush_cache(struct mmcsd_softc *sc); 193 static int mmcsd_ioctl(struct mmcsd_part *part, u_long cmd, void *data, 194 int fflag, struct thread *td); 195 static int mmcsd_ioctl_cmd(struct mmcsd_part *part, struct mmc_ioc_cmd *mic, 196 int fflag); 197 static uintmax_t mmcsd_pretty_size(off_t size, char *unit); 198 static daddr_t mmcsd_rw(struct mmcsd_part *part, struct bio *bp); 199 static int mmcsd_set_blockcount(struct mmcsd_softc *sc, u_int count, bool rel); 200 static int mmcsd_slicer(device_t dev, const char *provider, 201 struct flash_slice *slices, int *nslices); 202 static int mmcsd_switch_part(device_t bus, device_t dev, uint16_t rca, 203 u_int part); 204 205 #define MMCSD_DISK_LOCK(_part) mtx_lock(&(_part)->disk_mtx) 206 #define MMCSD_DISK_UNLOCK(_part) mtx_unlock(&(_part)->disk_mtx) 207 #define MMCSD_DISK_LOCK_INIT(_part) \ 208 mtx_init(&(_part)->disk_mtx, (_part)->name, "mmcsd disk", MTX_DEF) 209 #define MMCSD_DISK_LOCK_DESTROY(_part) mtx_destroy(&(_part)->disk_mtx); 210 #define MMCSD_DISK_ASSERT_LOCKED(_part) \ 211 mtx_assert(&(_part)->disk_mtx, MA_OWNED); 212 #define MMCSD_DISK_ASSERT_UNLOCKED(_part) \ 213 mtx_assert(&(_part)->disk_mtx, MA_NOTOWNED); 214 215 #define MMCSD_IOCTL_LOCK(_part) mtx_lock(&(_part)->ioctl_mtx) 216 #define MMCSD_IOCTL_UNLOCK(_part) mtx_unlock(&(_part)->ioctl_mtx) 217 #define MMCSD_IOCTL_LOCK_INIT(_part) \ 218 mtx_init(&(_part)->ioctl_mtx, (_part)->name, "mmcsd IOCTL", MTX_DEF) 219 #define MMCSD_IOCTL_LOCK_DESTROY(_part) mtx_destroy(&(_part)->ioctl_mtx); 220 #define MMCSD_IOCTL_ASSERT_LOCKED(_part) \ 221 mtx_assert(&(_part)->ioctl_mtx, MA_OWNED); 222 #define MMCSD_IOCLT_ASSERT_UNLOCKED(_part) \ 223 mtx_assert(&(_part)->ioctl_mtx, MA_NOTOWNED); 224 225 static int 226 mmcsd_probe(device_t dev) 227 { 228 229 device_quiet(dev); 230 device_set_desc(dev, "MMC/SD Memory Card"); 231 return (0); 232 } 233 234 static int 235 mmcsd_attach(device_t dev) 236 { 237 device_t mmcbus; 238 struct mmcsd_softc *sc; 239 const uint8_t *ext_csd; 240 off_t erase_size, sector_size, size, wp_size; 241 uintmax_t bytes; 242 int err, i; 243 uint32_t quirks; 244 uint8_t rev; 245 bool comp, ro; 246 char unit[2]; 247 248 sc = device_get_softc(dev); 249 sc->dev = dev; 250 sc->mmcbus = mmcbus = device_get_parent(dev); 251 sc->mode = mmc_get_card_type(dev); 252 /* 253 * Note that in principle with an SDHCI-like re-tuning implementation, 254 * the maximum data size can change at runtime due to a device removal/ 255 * insertion that results in switches to/from a transfer mode involving 256 * re-tuning, iff there are multiple devices on a given bus. Until now 257 * mmc(4) lacks support for rescanning already attached buses, however, 258 * and sdhci(4) to date has no support for shared buses in the first 259 * place either. 260 */ 261 sc->max_data = mmc_get_max_data(dev); 262 sc->high_cap = mmc_get_high_cap(dev); 263 sc->rca = mmc_get_rca(dev); 264 sc->cmd6_time = mmc_get_cmd6_timeout(dev); 265 quirks = mmc_get_quirks(dev); 266 267 /* Only MMC >= 4.x devices support EXT_CSD. */ 268 if (mmc_get_spec_vers(dev) >= 4) { 269 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 270 err = mmc_send_ext_csd(mmcbus, dev, sc->ext_csd); 271 MMCBUS_RELEASE_BUS(mmcbus, dev); 272 if (err != MMC_ERR_NONE) { 273 device_printf(dev, "Error reading EXT_CSD %s\n", 274 mmcsd_errmsg(err)); 275 return (ENXIO); 276 } 277 } 278 ext_csd = sc->ext_csd; 279 280 if ((quirks & MMC_QUIRK_INAND_CMD38) != 0) { 281 if (mmc_get_spec_vers(dev) < 4) { 282 device_printf(dev, 283 "MMC_QUIRK_INAND_CMD38 set but no EXT_CSD\n"); 284 return (EINVAL); 285 } 286 sc->flags |= MMCSD_INAND_CMD38; 287 } 288 289 /* 290 * EXT_CSD_SEC_FEATURE_SUPPORT_GB_CL_EN denotes support for both 291 * insecure and secure TRIM. 292 */ 293 if ((ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT] & 294 EXT_CSD_SEC_FEATURE_SUPPORT_GB_CL_EN) != 0 && 295 (quirks & MMC_QUIRK_BROKEN_TRIM) == 0) { 296 if (bootverbose) 297 device_printf(dev, "taking advantage of TRIM\n"); 298 sc->flags |= MMCSD_USE_TRIM; 299 sc->erase_sector = 1; 300 } else 301 sc->erase_sector = mmc_get_erase_sector(dev); 302 303 /* 304 * Enhanced user data area and general purpose partitions are only 305 * supported in revision 1.4 (EXT_CSD_REV == 4) and later, the RPMB 306 * partition in revision 1.5 (MMC v4.41, EXT_CSD_REV == 5) and later. 307 */ 308 rev = ext_csd[EXT_CSD_REV]; 309 310 /* 311 * With revision 1.5 (MMC v4.5, EXT_CSD_REV == 6) and later, take 312 * advantage of the device R/W cache if present and useage is not 313 * disabled. 314 */ 315 if (rev >= 6 && mmcsd_cache != 0) { 316 size = le32dec(&ext_csd[EXT_CSD_CACHE_SIZE]); 317 if (bootverbose) 318 device_printf(dev, "cache size %juKB\n", size); 319 if (size > 0) { 320 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 321 err = mmc_switch(mmcbus, dev, sc->rca, 322 EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CACHE_CTRL, 323 EXT_CSD_CACHE_CTRL_CACHE_EN, sc->cmd6_time, true); 324 MMCBUS_RELEASE_BUS(mmcbus, dev); 325 if (err != MMC_ERR_NONE) 326 device_printf(dev, "failed to enable cache\n"); 327 else 328 sc->flags |= MMCSD_FLUSH_CACHE; 329 } 330 } 331 332 /* 333 * Ignore user-creatable enhanced user data area and general purpose 334 * partitions partitions as long as partitioning hasn't been finished. 335 */ 336 comp = (ext_csd[EXT_CSD_PART_SET] & EXT_CSD_PART_SET_COMPLETED) != 0; 337 338 /* 339 * Add enhanced user data area slice, unless it spans the entirety of 340 * the user data area. The enhanced area is of a multiple of high 341 * capacity write protect groups ((ERASE_GRP_SIZE + HC_WP_GRP_SIZE) * 342 * 512 KB) and its offset given in either sectors or bytes, depending 343 * on whether it's a high capacity device or not. 344 * NB: The slicer and its slices need to be registered before adding 345 * the disk for the corresponding user data area as re-tasting is 346 * racy. 347 */ 348 sector_size = mmc_get_sector_size(dev); 349 size = ext_csd[EXT_CSD_ENH_SIZE_MULT] + 350 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) + 351 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16); 352 if (rev >= 4 && comp == TRUE && size > 0 && 353 (ext_csd[EXT_CSD_PART_SUPPORT] & 354 EXT_CSD_PART_SUPPORT_ENH_ATTR_EN) != 0 && 355 (ext_csd[EXT_CSD_PART_ATTR] & (EXT_CSD_PART_ATTR_ENH_USR)) != 0) { 356 erase_size = ext_csd[EXT_CSD_ERASE_GRP_SIZE] * 1024 * 357 MMC_SECTOR_SIZE; 358 wp_size = ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 359 size *= erase_size * wp_size; 360 if (size != mmc_get_media_size(dev) * sector_size) { 361 sc->enh_size = size; 362 sc->enh_base = 363 le32dec(&ext_csd[EXT_CSD_ENH_START_ADDR]) * 364 (sc->high_cap == 0 ? MMC_SECTOR_SIZE : 1); 365 } else if (bootverbose) 366 device_printf(dev, 367 "enhanced user data area spans entire device\n"); 368 } 369 370 /* 371 * Add default partition. This may be the only one or the user 372 * data area in case partitions are supported. 373 */ 374 ro = mmc_get_read_only(dev); 375 mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_DEFAULT, "mmcsd", 376 device_get_unit(dev), mmc_get_media_size(dev) * sector_size, ro); 377 378 if (mmc_get_spec_vers(dev) < 3) 379 return (0); 380 381 /* Belatedly announce enhanced user data slice. */ 382 if (sc->enh_size != 0) { 383 bytes = mmcsd_pretty_size(size, unit); 384 printf(FLASH_SLICES_FMT ": %ju%sB enhanced user data area " 385 "slice offset 0x%jx at %s\n", device_get_nameunit(dev), 386 MMCSD_LABEL_ENH, bytes, unit, (uintmax_t)sc->enh_base, 387 device_get_nameunit(dev)); 388 } 389 390 /* 391 * Determine partition switch timeout (provided in units of 10 ms) 392 * and ensure it's at least 300 ms as some eMMC chips lie. 393 */ 394 sc->part_time = max(ext_csd[EXT_CSD_PART_SWITCH_TO] * 10 * 1000, 395 300 * 1000); 396 397 /* Add boot partitions, which are of a fixed multiple of 128 KB. */ 398 size = ext_csd[EXT_CSD_BOOT_SIZE_MULT] * MMC_BOOT_RPMB_BLOCK_SIZE; 399 if (size > 0 && (mmcbr_get_caps(mmcbus) & MMC_CAP_BOOT_NOACC) == 0) { 400 mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_BOOT0, 401 MMCSD_FMT_BOOT, 0, size, 402 ro | ((ext_csd[EXT_CSD_BOOT_WP_STATUS] & 403 EXT_CSD_BOOT_WP_STATUS_BOOT0_MASK) != 0)); 404 mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_BOOT1, 405 MMCSD_FMT_BOOT, 1, size, 406 ro | ((ext_csd[EXT_CSD_BOOT_WP_STATUS] & 407 EXT_CSD_BOOT_WP_STATUS_BOOT1_MASK) != 0)); 408 } 409 410 /* Add RPMB partition, which also is of a fixed multiple of 128 KB. */ 411 size = ext_csd[EXT_CSD_RPMB_MULT] * MMC_BOOT_RPMB_BLOCK_SIZE; 412 if (rev >= 5 && size > 0) 413 mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_RPMB, 414 MMCSD_FMT_RPMB, 0, size, ro); 415 416 if (rev <= 3 || comp == FALSE) 417 return (0); 418 419 /* 420 * Add general purpose partitions, which are of a multiple of high 421 * capacity write protect groups, too. 422 */ 423 if ((ext_csd[EXT_CSD_PART_SUPPORT] & EXT_CSD_PART_SUPPORT_EN) != 0) { 424 erase_size = ext_csd[EXT_CSD_ERASE_GRP_SIZE] * 1024 * 425 MMC_SECTOR_SIZE; 426 wp_size = ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 427 for (i = 0; i < MMC_PART_GP_MAX; i++) { 428 size = ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3] + 429 (ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3 + 1] << 8) + 430 (ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3 + 2] << 16); 431 if (size == 0) 432 continue; 433 mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_GP0 + i, 434 MMCSD_FMT_GP, i, size * erase_size * wp_size, ro); 435 } 436 } 437 return (0); 438 } 439 440 static uintmax_t 441 mmcsd_pretty_size(off_t size, char *unit) 442 { 443 uintmax_t bytes; 444 int i; 445 446 /* 447 * Display in most natural units. There's no card < 1MB. However, 448 * RPMB partitions occasionally are smaller than that, though. The 449 * SD standard goes to 2 GiB due to its reliance on FAT, but the data 450 * format supports up to 4 GiB and some card makers push it up to this 451 * limit. The SDHC standard only goes to 32 GiB due to FAT32, but the 452 * data format supports up to 2 TiB however. 2048 GB isn't too ugly, 453 * so we note it in passing here and don't add the code to print TB). 454 * Since these cards are sold in terms of MB and GB not MiB and GiB, 455 * report them like that. We also round to the nearest unit, since 456 * many cards are a few percent short, even of the power of 10 size. 457 */ 458 bytes = size; 459 unit[0] = unit[1] = '\0'; 460 for (i = 0; i <= 2 && bytes >= 1000; i++) { 461 bytes = (bytes + 1000 / 2 - 1) / 1000; 462 switch (i) { 463 case 0: 464 unit[0] = 'k'; 465 break; 466 case 1: 467 unit[0] = 'M'; 468 break; 469 case 2: 470 unit[0] = 'G'; 471 break; 472 default: 473 break; 474 } 475 } 476 return (bytes); 477 } 478 479 static struct cdevsw mmcsd_rpmb_cdevsw = { 480 .d_version = D_VERSION, 481 .d_name = "mmcsdrpmb", 482 .d_ioctl = mmcsd_ioctl_rpmb 483 }; 484 485 static void 486 mmcsd_add_part(struct mmcsd_softc *sc, u_int type, const char *name, u_int cnt, 487 off_t media_size, bool ro) 488 { 489 struct make_dev_args args; 490 device_t dev, mmcbus; 491 const char *ext; 492 const uint8_t *ext_csd; 493 struct mmcsd_part *part; 494 struct disk *d; 495 uintmax_t bytes; 496 u_int gp; 497 uint32_t speed; 498 uint8_t extattr; 499 bool enh; 500 char unit[2]; 501 502 dev = sc->dev; 503 mmcbus = sc->mmcbus; 504 part = sc->part[type] = malloc(sizeof(*part), M_DEVBUF, 505 M_WAITOK | M_ZERO); 506 part->sc = sc; 507 part->cnt = cnt; 508 part->type = type; 509 part->ro = ro; 510 snprintf(part->name, sizeof(part->name), name, device_get_unit(dev)); 511 512 MMCSD_IOCTL_LOCK_INIT(part); 513 514 /* 515 * For the RPMB partition, allow IOCTL access only. 516 * NB: If ever attaching RPMB partitions to disk(9), the re-tuning 517 * implementation and especially its pausing need to be revisited, 518 * because then re-tuning requests may be issued by the IOCTL half 519 * of this driver while re-tuning is already paused by the disk(9) 520 * one and vice versa. 521 */ 522 if (type == EXT_CSD_PART_CONFIG_ACC_RPMB) { 523 make_dev_args_init(&args); 524 args.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_WAITOK; 525 args.mda_devsw = &mmcsd_rpmb_cdevsw; 526 args.mda_uid = UID_ROOT; 527 args.mda_gid = GID_OPERATOR; 528 args.mda_mode = 0640; 529 args.mda_si_drv1 = part; 530 if (make_dev_s(&args, &sc->rpmb_dev, "%s", part->name) != 0) { 531 device_printf(dev, "Failed to make RPMB device\n"); 532 free(part, M_DEVBUF); 533 return; 534 } 535 } else { 536 MMCSD_DISK_LOCK_INIT(part); 537 538 d = part->disk = disk_alloc(); 539 d->d_close = mmcsd_close; 540 d->d_strategy = mmcsd_strategy; 541 d->d_ioctl = mmcsd_ioctl_disk; 542 d->d_dump = mmcsd_dump; 543 d->d_getattr = mmcsd_getattr; 544 d->d_name = part->name; 545 d->d_drv1 = part; 546 d->d_sectorsize = mmc_get_sector_size(dev); 547 d->d_maxsize = sc->max_data * d->d_sectorsize; 548 d->d_mediasize = media_size; 549 d->d_stripesize = sc->erase_sector * d->d_sectorsize; 550 d->d_unit = cnt; 551 d->d_flags = DISKFLAG_CANDELETE; 552 if ((sc->flags & MMCSD_FLUSH_CACHE) != 0) 553 d->d_flags |= DISKFLAG_CANFLUSHCACHE; 554 d->d_delmaxsize = mmc_get_erase_sector(dev) * d->d_sectorsize; 555 strlcpy(d->d_ident, mmc_get_card_sn_string(dev), 556 sizeof(d->d_ident)); 557 strlcpy(d->d_descr, mmc_get_card_id_string(dev), 558 sizeof(d->d_descr)); 559 d->d_rotation_rate = DISK_RR_NON_ROTATING; 560 561 disk_create(d, DISK_VERSION); 562 bioq_init(&part->bio_queue); 563 564 part->running = 1; 565 kproc_create(&mmcsd_task, part, &part->p, 0, 0, 566 "%s%d: mmc/sd card", part->name, cnt); 567 } 568 569 bytes = mmcsd_pretty_size(media_size, unit); 570 if (type == EXT_CSD_PART_CONFIG_ACC_DEFAULT) { 571 speed = mmcbr_get_clock(mmcbus); 572 printf("%s%d: %ju%sB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n", 573 part->name, cnt, bytes, unit, mmc_get_card_id_string(dev), 574 ro ? " (read-only)" : "", device_get_nameunit(mmcbus), 575 speed / 1000000, (speed / 100000) % 10, 576 mmcsd_bus_bit_width(dev), sc->max_data); 577 } else if (type == EXT_CSD_PART_CONFIG_ACC_RPMB) { 578 printf("%s: %ju%sB partition %d%s at %s\n", part->name, bytes, 579 unit, type, ro ? " (read-only)" : "", 580 device_get_nameunit(dev)); 581 } else { 582 enh = false; 583 ext = NULL; 584 extattr = 0; 585 if (type >= EXT_CSD_PART_CONFIG_ACC_GP0 && 586 type <= EXT_CSD_PART_CONFIG_ACC_GP3) { 587 ext_csd = sc->ext_csd; 588 gp = type - EXT_CSD_PART_CONFIG_ACC_GP0; 589 if ((ext_csd[EXT_CSD_PART_SUPPORT] & 590 EXT_CSD_PART_SUPPORT_ENH_ATTR_EN) != 0 && 591 (ext_csd[EXT_CSD_PART_ATTR] & 592 (EXT_CSD_PART_ATTR_ENH_GP0 << gp)) != 0) 593 enh = true; 594 else if ((ext_csd[EXT_CSD_PART_SUPPORT] & 595 EXT_CSD_PART_SUPPORT_EXT_ATTR_EN) != 0) { 596 extattr = (ext_csd[EXT_CSD_EXT_PART_ATTR + 597 (gp / 2)] >> (4 * (gp % 2))) & 0xF; 598 switch (extattr) { 599 case EXT_CSD_EXT_PART_ATTR_DEFAULT: 600 break; 601 case EXT_CSD_EXT_PART_ATTR_SYSTEMCODE: 602 ext = "system code"; 603 break; 604 case EXT_CSD_EXT_PART_ATTR_NPERSISTENT: 605 ext = "non-persistent"; 606 break; 607 default: 608 ext = "reserved"; 609 break; 610 } 611 } 612 } 613 if (ext == NULL) 614 printf("%s%d: %ju%sB partition %d%s%s at %s\n", 615 part->name, cnt, bytes, unit, type, enh ? 616 " enhanced" : "", ro ? " (read-only)" : "", 617 device_get_nameunit(dev)); 618 else 619 printf("%s%d: %ju%sB partition %d extended 0x%x " 620 "(%s)%s at %s\n", part->name, cnt, bytes, unit, 621 type, extattr, ext, ro ? " (read-only)" : "", 622 device_get_nameunit(dev)); 623 } 624 } 625 626 static int 627 mmcsd_slicer(device_t dev, const char *provider, 628 struct flash_slice *slices, int *nslices) 629 { 630 char name[MMCSD_PART_NAMELEN]; 631 struct mmcsd_softc *sc; 632 struct mmcsd_part *part; 633 634 *nslices = 0; 635 if (slices == NULL) 636 return (ENOMEM); 637 638 sc = device_get_softc(dev); 639 if (sc->enh_size == 0) 640 return (ENXIO); 641 642 part = sc->part[EXT_CSD_PART_CONFIG_ACC_DEFAULT]; 643 snprintf(name, sizeof(name), "%s%d", part->disk->d_name, 644 part->disk->d_unit); 645 if (strcmp(name, provider) != 0) 646 return (ENXIO); 647 648 *nslices = 1; 649 slices[0].base = sc->enh_base; 650 slices[0].size = sc->enh_size; 651 slices[0].label = MMCSD_LABEL_ENH; 652 return (0); 653 } 654 655 static int 656 mmcsd_detach(device_t dev) 657 { 658 struct mmcsd_softc *sc = device_get_softc(dev); 659 struct mmcsd_part *part; 660 int i; 661 662 for (i = 0; i < MMC_PART_MAX; i++) { 663 part = sc->part[i]; 664 if (part != NULL) { 665 if (part->disk != NULL) { 666 MMCSD_DISK_LOCK(part); 667 part->suspend = 0; 668 if (part->running > 0) { 669 /* kill thread */ 670 part->running = 0; 671 wakeup(part); 672 /* wait for thread to finish. */ 673 while (part->running != -1) 674 msleep(part, &part->disk_mtx, 0, 675 "mmcsd disk detach", 0); 676 } 677 MMCSD_DISK_UNLOCK(part); 678 } 679 MMCSD_IOCTL_LOCK(part); 680 while (part->ioctl > 0) 681 msleep(part, &part->ioctl_mtx, 0, 682 "mmcsd IOCTL detach", 0); 683 part->ioctl = -1; 684 MMCSD_IOCTL_UNLOCK(part); 685 } 686 } 687 688 if (sc->rpmb_dev != NULL) 689 destroy_dev(sc->rpmb_dev); 690 691 for (i = 0; i < MMC_PART_MAX; i++) { 692 part = sc->part[i]; 693 if (part != NULL) { 694 if (part->disk != NULL) { 695 /* Flush the request queue. */ 696 bioq_flush(&part->bio_queue, NULL, ENXIO); 697 /* kill disk */ 698 disk_destroy(part->disk); 699 700 MMCSD_DISK_LOCK_DESTROY(part); 701 } 702 MMCSD_IOCTL_LOCK_DESTROY(part); 703 free(part, M_DEVBUF); 704 } 705 } 706 if (mmcsd_flush_cache(sc) != MMC_ERR_NONE) 707 device_printf(dev, "failed to flush cache\n"); 708 return (0); 709 } 710 711 static int 712 mmcsd_shutdown(device_t dev) 713 { 714 struct mmcsd_softc *sc = device_get_softc(dev); 715 716 if (mmcsd_flush_cache(sc) != MMC_ERR_NONE) 717 device_printf(dev, "failed to flush cache\n"); 718 return (0); 719 } 720 721 static int 722 mmcsd_suspend(device_t dev) 723 { 724 struct mmcsd_softc *sc = device_get_softc(dev); 725 struct mmcsd_part *part; 726 int i; 727 728 for (i = 0; i < MMC_PART_MAX; i++) { 729 part = sc->part[i]; 730 if (part != NULL) { 731 if (part->disk != NULL) { 732 MMCSD_DISK_LOCK(part); 733 part->suspend = 1; 734 if (part->running > 0) { 735 /* kill thread */ 736 part->running = 0; 737 wakeup(part); 738 /* wait for thread to finish. */ 739 while (part->running != -1) 740 msleep(part, &part->disk_mtx, 0, 741 "mmcsd disk suspension", 0); 742 } 743 MMCSD_DISK_UNLOCK(part); 744 } 745 MMCSD_IOCTL_LOCK(part); 746 while (part->ioctl > 0) 747 msleep(part, &part->ioctl_mtx, 0, 748 "mmcsd IOCTL suspension", 0); 749 part->ioctl = -1; 750 MMCSD_IOCTL_UNLOCK(part); 751 } 752 } 753 if (mmcsd_flush_cache(sc) != MMC_ERR_NONE) 754 device_printf(dev, "failed to flush cache\n"); 755 return (0); 756 } 757 758 static int 759 mmcsd_resume(device_t dev) 760 { 761 struct mmcsd_softc *sc = device_get_softc(dev); 762 struct mmcsd_part *part; 763 int i; 764 765 for (i = 0; i < MMC_PART_MAX; i++) { 766 part = sc->part[i]; 767 if (part != NULL) { 768 if (part->disk != NULL) { 769 MMCSD_DISK_LOCK(part); 770 part->suspend = 0; 771 if (part->running <= 0) { 772 part->running = 1; 773 MMCSD_DISK_UNLOCK(part); 774 kproc_create(&mmcsd_task, part, 775 &part->p, 0, 0, "%s%d: mmc/sd card", 776 part->name, part->cnt); 777 } else 778 MMCSD_DISK_UNLOCK(part); 779 } 780 MMCSD_IOCTL_LOCK(part); 781 part->ioctl = 0; 782 MMCSD_IOCTL_UNLOCK(part); 783 } 784 } 785 return (0); 786 } 787 788 static int 789 mmcsd_close(struct disk *dp) 790 { 791 struct mmcsd_softc *sc; 792 793 if ((dp->d_flags & DISKFLAG_OPEN) != 0) { 794 sc = ((struct mmcsd_part *)dp->d_drv1)->sc; 795 if (mmcsd_flush_cache(sc) != MMC_ERR_NONE) 796 device_printf(sc->dev, "failed to flush cache\n"); 797 } 798 return (0); 799 } 800 801 static void 802 mmcsd_strategy(struct bio *bp) 803 { 804 struct mmcsd_part *part; 805 806 part = bp->bio_disk->d_drv1; 807 MMCSD_DISK_LOCK(part); 808 if (part->running > 0 || part->suspend > 0) { 809 bioq_disksort(&part->bio_queue, bp); 810 MMCSD_DISK_UNLOCK(part); 811 wakeup(part); 812 } else { 813 MMCSD_DISK_UNLOCK(part); 814 biofinish(bp, NULL, ENXIO); 815 } 816 } 817 818 static int 819 mmcsd_ioctl_rpmb(struct cdev *dev, u_long cmd, caddr_t data, 820 int fflag, struct thread *td) 821 { 822 823 return (mmcsd_ioctl(dev->si_drv1, cmd, data, fflag, td)); 824 } 825 826 static int 827 mmcsd_ioctl_disk(struct disk *disk, u_long cmd, void *data, int fflag, 828 struct thread *td) 829 { 830 831 return (mmcsd_ioctl(disk->d_drv1, cmd, data, fflag, td)); 832 } 833 834 static int 835 mmcsd_ioctl(struct mmcsd_part *part, u_long cmd, void *data, int fflag, 836 struct thread *td) 837 { 838 struct mmc_ioc_cmd *mic; 839 struct mmc_ioc_multi_cmd *mimc; 840 int i, err; 841 u_long cnt, size; 842 843 if ((fflag & FREAD) == 0) 844 return (EBADF); 845 846 err = priv_check(td, PRIV_DRIVER); 847 if (err != 0) 848 return (err); 849 850 err = 0; 851 switch (cmd) { 852 case MMC_IOC_CMD: 853 mic = data; 854 err = mmcsd_ioctl_cmd(part, mic, fflag); 855 break; 856 case MMC_IOC_MULTI_CMD: 857 mimc = data; 858 if (mimc->num_of_cmds == 0) 859 break; 860 if (mimc->num_of_cmds > MMC_IOC_MAX_CMDS) 861 return (EINVAL); 862 cnt = mimc->num_of_cmds; 863 size = sizeof(*mic) * cnt; 864 mic = malloc(size, M_TEMP, M_WAITOK); 865 err = copyin((const void *)mimc->cmds, mic, size); 866 if (err == 0) { 867 for (i = 0; i < cnt; i++) { 868 err = mmcsd_ioctl_cmd(part, &mic[i], fflag); 869 if (err != 0) 870 break; 871 } 872 } 873 free(mic, M_TEMP); 874 break; 875 default: 876 return (ENOIOCTL); 877 } 878 return (err); 879 } 880 881 static int 882 mmcsd_ioctl_cmd(struct mmcsd_part *part, struct mmc_ioc_cmd *mic, int fflag) 883 { 884 struct mmc_command cmd; 885 struct mmc_data data; 886 struct mmcsd_softc *sc; 887 device_t dev, mmcbus; 888 void *dp; 889 u_long len; 890 int err, retries; 891 uint32_t status; 892 uint16_t rca; 893 894 if ((fflag & FWRITE) == 0 && mic->write_flag != 0) 895 return (EBADF); 896 897 if (part->ro == TRUE && mic->write_flag != 0) 898 return (EROFS); 899 900 /* 901 * We don't need to explicitly lock against the disk(9) half of this 902 * driver as MMCBUS_ACQUIRE_BUS() will serialize us. However, it's 903 * necessary to protect against races with detachment and suspension, 904 * especially since it's required to switch away from RPMB partitions 905 * again after an access (see mmcsd_switch_part()). 906 */ 907 MMCSD_IOCTL_LOCK(part); 908 while (part->ioctl != 0) { 909 if (part->ioctl < 0) { 910 MMCSD_IOCTL_UNLOCK(part); 911 return (ENXIO); 912 } 913 msleep(part, &part->ioctl_mtx, 0, "mmcsd IOCTL", 0); 914 } 915 part->ioctl = 1; 916 MMCSD_IOCTL_UNLOCK(part); 917 918 err = 0; 919 dp = NULL; 920 len = mic->blksz * mic->blocks; 921 if (len > MMC_IOC_MAX_BYTES) { 922 err = EOVERFLOW; 923 goto out; 924 } 925 if (len != 0) { 926 dp = malloc(len, M_TEMP, M_WAITOK); 927 err = copyin((void *)(uintptr_t)mic->data_ptr, dp, len); 928 if (err != 0) 929 goto out; 930 } 931 memset(&cmd, 0, sizeof(cmd)); 932 memset(&data, 0, sizeof(data)); 933 cmd.opcode = mic->opcode; 934 cmd.arg = mic->arg; 935 cmd.flags = mic->flags; 936 if (len != 0) { 937 data.len = len; 938 data.data = dp; 939 data.flags = mic->write_flag != 0 ? MMC_DATA_WRITE : 940 MMC_DATA_READ; 941 cmd.data = &data; 942 } 943 sc = part->sc; 944 rca = sc->rca; 945 if (mic->is_acmd == 0) { 946 /* Enforce/patch/restrict RCA-based commands */ 947 switch (cmd.opcode) { 948 case MMC_SET_RELATIVE_ADDR: 949 case MMC_SELECT_CARD: 950 err = EPERM; 951 goto out; 952 case MMC_STOP_TRANSMISSION: 953 if ((cmd.arg & 0x1) == 0) 954 break; 955 /* FALLTHROUGH */ 956 case MMC_SLEEP_AWAKE: 957 case MMC_SEND_CSD: 958 case MMC_SEND_CID: 959 case MMC_SEND_STATUS: 960 case MMC_GO_INACTIVE_STATE: 961 case MMC_FAST_IO: 962 case MMC_APP_CMD: 963 cmd.arg = (cmd.arg & 0x0000FFFF) | (rca << 16); 964 break; 965 default: 966 break; 967 } 968 /* 969 * No partition switching in userland; it's almost impossible 970 * to recover from that, especially if things go wrong. 971 */ 972 if (cmd.opcode == MMC_SWITCH_FUNC && dp != NULL && 973 (((uint8_t *)dp)[EXT_CSD_PART_CONFIG] & 974 EXT_CSD_PART_CONFIG_ACC_MASK) != part->type) { 975 err = EINVAL; 976 goto out; 977 } 978 } 979 dev = sc->dev; 980 mmcbus = sc->mmcbus; 981 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 982 err = mmcsd_switch_part(mmcbus, dev, rca, part->type); 983 if (err != MMC_ERR_NONE) 984 goto release; 985 if (part->type == EXT_CSD_PART_CONFIG_ACC_RPMB) { 986 err = mmcsd_set_blockcount(sc, mic->blocks, 987 mic->write_flag & (1 << 31)); 988 if (err != MMC_ERR_NONE) 989 goto switch_back; 990 } 991 if (mic->write_flag != 0) 992 sc->flags |= MMCSD_DIRTY; 993 if (mic->is_acmd != 0) 994 (void)mmc_wait_for_app_cmd(mmcbus, dev, rca, &cmd, 0); 995 else 996 (void)mmc_wait_for_cmd(mmcbus, dev, &cmd, 0); 997 if (part->type == EXT_CSD_PART_CONFIG_ACC_RPMB) { 998 /* 999 * If the request went to the RPMB partition, try to ensure 1000 * that the command actually has completed. 1001 */ 1002 retries = MMCSD_CMD_RETRIES; 1003 do { 1004 err = mmc_send_status(mmcbus, dev, rca, &status); 1005 if (err != MMC_ERR_NONE) 1006 break; 1007 if (R1_STATUS(status) == 0 && 1008 R1_CURRENT_STATE(status) != R1_STATE_PRG) 1009 break; 1010 DELAY(1000); 1011 } while (retries-- > 0); 1012 } 1013 /* 1014 * If EXT_CSD was changed, our copy is outdated now. Specifically, 1015 * the upper bits of EXT_CSD_PART_CONFIG used in mmcsd_switch_part(), 1016 * so retrieve EXT_CSD again. 1017 */ 1018 if (cmd.opcode == MMC_SWITCH_FUNC) { 1019 err = mmc_send_ext_csd(mmcbus, dev, sc->ext_csd); 1020 if (err != MMC_ERR_NONE) 1021 goto release; 1022 } 1023 switch_back: 1024 if (part->type == EXT_CSD_PART_CONFIG_ACC_RPMB) { 1025 /* 1026 * If the request went to the RPMB partition, always switch 1027 * back to the default partition (see mmcsd_switch_part()). 1028 */ 1029 err = mmcsd_switch_part(mmcbus, dev, rca, 1030 EXT_CSD_PART_CONFIG_ACC_DEFAULT); 1031 if (err != MMC_ERR_NONE) 1032 goto release; 1033 } 1034 MMCBUS_RELEASE_BUS(mmcbus, dev); 1035 if (cmd.error != MMC_ERR_NONE) { 1036 switch (cmd.error) { 1037 case MMC_ERR_TIMEOUT: 1038 err = ETIMEDOUT; 1039 break; 1040 case MMC_ERR_BADCRC: 1041 err = EILSEQ; 1042 break; 1043 case MMC_ERR_INVALID: 1044 err = EINVAL; 1045 break; 1046 case MMC_ERR_NO_MEMORY: 1047 err = ENOMEM; 1048 break; 1049 default: 1050 err = EIO; 1051 break; 1052 } 1053 goto out; 1054 } 1055 memcpy(mic->response, cmd.resp, 4 * sizeof(uint32_t)); 1056 if (mic->write_flag == 0 && len != 0) { 1057 err = copyout(dp, (void *)(uintptr_t)mic->data_ptr, len); 1058 if (err != 0) 1059 goto out; 1060 } 1061 goto out; 1062 1063 release: 1064 MMCBUS_RELEASE_BUS(mmcbus, dev); 1065 err = EIO; 1066 1067 out: 1068 MMCSD_IOCTL_LOCK(part); 1069 part->ioctl = 0; 1070 MMCSD_IOCTL_UNLOCK(part); 1071 wakeup(part); 1072 if (dp != NULL) 1073 free(dp, M_TEMP); 1074 return (err); 1075 } 1076 1077 static int 1078 mmcsd_getattr(struct bio *bp) 1079 { 1080 struct mmcsd_part *part; 1081 device_t dev; 1082 1083 if (strcmp(bp->bio_attribute, "MMC::device") == 0) { 1084 if (bp->bio_length != sizeof(dev)) 1085 return (EFAULT); 1086 part = bp->bio_disk->d_drv1; 1087 dev = part->sc->dev; 1088 bcopy(&dev, bp->bio_data, sizeof(dev)); 1089 bp->bio_completed = bp->bio_length; 1090 return (0); 1091 } 1092 return (-1); 1093 } 1094 1095 static int 1096 mmcsd_set_blockcount(struct mmcsd_softc *sc, u_int count, bool reliable) 1097 { 1098 struct mmc_command cmd; 1099 struct mmc_request req; 1100 1101 memset(&req, 0, sizeof(req)); 1102 memset(&cmd, 0, sizeof(cmd)); 1103 cmd.mrq = &req; 1104 req.cmd = &cmd; 1105 cmd.opcode = MMC_SET_BLOCK_COUNT; 1106 cmd.arg = count & 0x0000FFFF; 1107 if (reliable) 1108 cmd.arg |= 1 << 31; 1109 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1110 MMCBUS_WAIT_FOR_REQUEST(sc->mmcbus, sc->dev, &req); 1111 return (cmd.error); 1112 } 1113 1114 static int 1115 mmcsd_switch_part(device_t bus, device_t dev, uint16_t rca, u_int part) 1116 { 1117 struct mmcsd_softc *sc; 1118 int err; 1119 uint8_t value; 1120 1121 sc = device_get_softc(dev); 1122 1123 if (sc->mode == mode_sd) 1124 return (MMC_ERR_NONE); 1125 1126 /* 1127 * According to section "6.2.2 Command restrictions" of the eMMC 1128 * specification v5.1, CMD19/CMD21 aren't allowed to be used with 1129 * RPMB partitions. So we pause re-tuning along with triggering 1130 * it up-front to decrease the likelihood of re-tuning becoming 1131 * necessary while accessing an RPMB partition. Consequently, an 1132 * RPMB partition should immediately be switched away from again 1133 * after an access in order to allow for re-tuning to take place 1134 * anew. 1135 */ 1136 if (part == EXT_CSD_PART_CONFIG_ACC_RPMB) 1137 MMCBUS_RETUNE_PAUSE(sc->mmcbus, sc->dev, true); 1138 1139 if (sc->part_curr == part) 1140 return (MMC_ERR_NONE); 1141 1142 value = (sc->ext_csd[EXT_CSD_PART_CONFIG] & 1143 ~EXT_CSD_PART_CONFIG_ACC_MASK) | part; 1144 /* Jump! */ 1145 err = mmc_switch(bus, dev, rca, EXT_CSD_CMD_SET_NORMAL, 1146 EXT_CSD_PART_CONFIG, value, sc->part_time, true); 1147 if (err != MMC_ERR_NONE) { 1148 if (part == EXT_CSD_PART_CONFIG_ACC_RPMB) 1149 MMCBUS_RETUNE_UNPAUSE(sc->mmcbus, sc->dev); 1150 return (err); 1151 } 1152 1153 sc->ext_csd[EXT_CSD_PART_CONFIG] = value; 1154 if (sc->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB) 1155 MMCBUS_RETUNE_UNPAUSE(sc->mmcbus, sc->dev); 1156 sc->part_curr = part; 1157 return (MMC_ERR_NONE); 1158 } 1159 1160 static const char * 1161 mmcsd_errmsg(int e) 1162 { 1163 1164 if (e < 0 || e > MMC_ERR_MAX) 1165 return "Bad error code"; 1166 return (errmsg[e]); 1167 } 1168 1169 static daddr_t 1170 mmcsd_rw(struct mmcsd_part *part, struct bio *bp) 1171 { 1172 daddr_t block, end; 1173 struct mmc_command cmd; 1174 struct mmc_command stop; 1175 struct mmc_request req; 1176 struct mmc_data data; 1177 struct mmcsd_softc *sc; 1178 device_t dev, mmcbus; 1179 u_int numblocks, sz; 1180 char *vaddr; 1181 1182 sc = part->sc; 1183 dev = sc->dev; 1184 mmcbus = sc->mmcbus; 1185 1186 block = bp->bio_pblkno; 1187 sz = part->disk->d_sectorsize; 1188 end = bp->bio_pblkno + (bp->bio_bcount / sz); 1189 while (block < end) { 1190 vaddr = bp->bio_data + (block - bp->bio_pblkno) * sz; 1191 numblocks = min(end - block, sc->max_data); 1192 memset(&req, 0, sizeof(req)); 1193 memset(&cmd, 0, sizeof(cmd)); 1194 memset(&stop, 0, sizeof(stop)); 1195 memset(&data, 0, sizeof(data)); 1196 cmd.mrq = &req; 1197 req.cmd = &cmd; 1198 cmd.data = &data; 1199 if (bp->bio_cmd == BIO_READ) { 1200 if (numblocks > 1) 1201 cmd.opcode = MMC_READ_MULTIPLE_BLOCK; 1202 else 1203 cmd.opcode = MMC_READ_SINGLE_BLOCK; 1204 } else { 1205 sc->flags |= MMCSD_DIRTY; 1206 if (numblocks > 1) 1207 cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK; 1208 else 1209 cmd.opcode = MMC_WRITE_BLOCK; 1210 } 1211 cmd.arg = block; 1212 if (sc->high_cap == 0) 1213 cmd.arg <<= 9; 1214 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1215 data.data = vaddr; 1216 data.mrq = &req; 1217 if (bp->bio_cmd == BIO_READ) 1218 data.flags = MMC_DATA_READ; 1219 else 1220 data.flags = MMC_DATA_WRITE; 1221 data.len = numblocks * sz; 1222 if (numblocks > 1) { 1223 data.flags |= MMC_DATA_MULTI; 1224 stop.opcode = MMC_STOP_TRANSMISSION; 1225 stop.arg = 0; 1226 stop.flags = MMC_RSP_R1B | MMC_CMD_AC; 1227 stop.mrq = &req; 1228 req.stop = &stop; 1229 } 1230 MMCBUS_WAIT_FOR_REQUEST(mmcbus, dev, &req); 1231 if (req.cmd->error != MMC_ERR_NONE) { 1232 if (ppsratecheck(&sc->log_time, &sc->log_count, 1233 LOG_PPS)) 1234 device_printf(dev, "Error indicated: %d %s\n", 1235 req.cmd->error, 1236 mmcsd_errmsg(req.cmd->error)); 1237 break; 1238 } 1239 block += numblocks; 1240 } 1241 return (block); 1242 } 1243 1244 static daddr_t 1245 mmcsd_delete(struct mmcsd_part *part, struct bio *bp) 1246 { 1247 daddr_t block, end, start, stop; 1248 struct mmc_command cmd; 1249 struct mmc_request req; 1250 struct mmcsd_softc *sc; 1251 device_t dev, mmcbus; 1252 u_int erase_sector, sz; 1253 int err; 1254 bool use_trim; 1255 1256 sc = part->sc; 1257 dev = sc->dev; 1258 mmcbus = sc->mmcbus; 1259 1260 block = bp->bio_pblkno; 1261 sz = part->disk->d_sectorsize; 1262 end = bp->bio_pblkno + (bp->bio_bcount / sz); 1263 use_trim = sc->flags & MMCSD_USE_TRIM; 1264 if (use_trim == true) { 1265 start = block; 1266 stop = end; 1267 } else { 1268 /* Coalesce with the remainder of the previous request. */ 1269 if (block > part->eblock && block <= part->eend) 1270 block = part->eblock; 1271 if (end >= part->eblock && end < part->eend) 1272 end = part->eend; 1273 /* Safely round to the erase sector boundaries. */ 1274 erase_sector = sc->erase_sector; 1275 start = block + erase_sector - 1; /* Round up. */ 1276 start -= start % erase_sector; 1277 stop = end; /* Round down. */ 1278 stop -= end % erase_sector; 1279 /* 1280 * We can't erase an area smaller than an erase sector, so 1281 * store it for later. 1282 */ 1283 if (start >= stop) { 1284 part->eblock = block; 1285 part->eend = end; 1286 return (end); 1287 } 1288 } 1289 1290 if ((sc->flags & MMCSD_INAND_CMD38) != 0) { 1291 err = mmc_switch(mmcbus, dev, sc->rca, EXT_CSD_CMD_SET_NORMAL, 1292 EXT_CSD_INAND_CMD38, use_trim == true ? 1293 EXT_CSD_INAND_CMD38_TRIM : EXT_CSD_INAND_CMD38_ERASE, 1294 sc->cmd6_time, true); 1295 if (err != MMC_ERR_NONE) { 1296 device_printf(dev, 1297 "Setting iNAND erase command failed %s\n", 1298 mmcsd_errmsg(err)); 1299 return (block); 1300 } 1301 } 1302 1303 /* 1304 * Pause re-tuning so it won't interfere with the order of erase 1305 * commands. Note that these latter don't use the data lines, so 1306 * re-tuning shouldn't actually become necessary during erase. 1307 */ 1308 MMCBUS_RETUNE_PAUSE(mmcbus, dev, false); 1309 /* Set erase start position. */ 1310 memset(&req, 0, sizeof(req)); 1311 memset(&cmd, 0, sizeof(cmd)); 1312 cmd.mrq = &req; 1313 req.cmd = &cmd; 1314 if (sc->mode == mode_sd) 1315 cmd.opcode = SD_ERASE_WR_BLK_START; 1316 else 1317 cmd.opcode = MMC_ERASE_GROUP_START; 1318 cmd.arg = start; 1319 if (sc->high_cap == 0) 1320 cmd.arg <<= 9; 1321 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1322 MMCBUS_WAIT_FOR_REQUEST(mmcbus, dev, &req); 1323 if (req.cmd->error != MMC_ERR_NONE) { 1324 device_printf(dev, "Setting erase start position failed %s\n", 1325 mmcsd_errmsg(req.cmd->error)); 1326 block = bp->bio_pblkno; 1327 goto unpause; 1328 } 1329 /* Set erase stop position. */ 1330 memset(&req, 0, sizeof(req)); 1331 memset(&cmd, 0, sizeof(cmd)); 1332 req.cmd = &cmd; 1333 if (sc->mode == mode_sd) 1334 cmd.opcode = SD_ERASE_WR_BLK_END; 1335 else 1336 cmd.opcode = MMC_ERASE_GROUP_END; 1337 cmd.arg = stop; 1338 if (sc->high_cap == 0) 1339 cmd.arg <<= 9; 1340 cmd.arg--; 1341 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1342 MMCBUS_WAIT_FOR_REQUEST(mmcbus, dev, &req); 1343 if (req.cmd->error != MMC_ERR_NONE) { 1344 device_printf(dev, "Setting erase stop position failed %s\n", 1345 mmcsd_errmsg(req.cmd->error)); 1346 block = bp->bio_pblkno; 1347 goto unpause; 1348 } 1349 /* Erase range. */ 1350 memset(&req, 0, sizeof(req)); 1351 memset(&cmd, 0, sizeof(cmd)); 1352 req.cmd = &cmd; 1353 cmd.opcode = MMC_ERASE; 1354 cmd.arg = use_trim == true ? MMC_ERASE_TRIM : MMC_ERASE_ERASE; 1355 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 1356 MMCBUS_WAIT_FOR_REQUEST(mmcbus, dev, &req); 1357 if (req.cmd->error != MMC_ERR_NONE) { 1358 device_printf(dev, "Issuing erase command failed %s\n", 1359 mmcsd_errmsg(req.cmd->error)); 1360 block = bp->bio_pblkno; 1361 goto unpause; 1362 } 1363 if (use_trim == false) { 1364 /* Store one of the remaining parts for the next call. */ 1365 if (bp->bio_pblkno >= part->eblock || block == start) { 1366 part->eblock = stop; /* Predict next forward. */ 1367 part->eend = end; 1368 } else { 1369 part->eblock = block; /* Predict next backward. */ 1370 part->eend = start; 1371 } 1372 } 1373 block = end; 1374 unpause: 1375 MMCBUS_RETUNE_UNPAUSE(mmcbus, dev); 1376 return (block); 1377 } 1378 1379 static int 1380 mmcsd_dump(void *arg, void *virtual, off_t offset, size_t length) 1381 { 1382 struct bio bp; 1383 daddr_t block, end; 1384 struct disk *disk; 1385 struct mmcsd_softc *sc; 1386 struct mmcsd_part *part; 1387 device_t dev, mmcbus; 1388 int err; 1389 1390 disk = arg; 1391 part = disk->d_drv1; 1392 sc = part->sc; 1393 1394 /* length zero is special and really means flush buffers to media */ 1395 if (length == 0) { 1396 err = mmcsd_flush_cache(sc); 1397 if (err != MMC_ERR_NONE) 1398 return (EIO); 1399 return (0); 1400 } 1401 1402 dev = sc->dev; 1403 mmcbus = sc->mmcbus; 1404 1405 g_reset_bio(&bp); 1406 bp.bio_disk = disk; 1407 bp.bio_pblkno = offset / disk->d_sectorsize; 1408 bp.bio_bcount = length; 1409 bp.bio_data = virtual; 1410 bp.bio_cmd = BIO_WRITE; 1411 end = bp.bio_pblkno + bp.bio_bcount / disk->d_sectorsize; 1412 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 1413 err = mmcsd_switch_part(mmcbus, dev, sc->rca, part->type); 1414 if (err != MMC_ERR_NONE) { 1415 if (ppsratecheck(&sc->log_time, &sc->log_count, LOG_PPS)) 1416 device_printf(dev, "Partition switch error\n"); 1417 MMCBUS_RELEASE_BUS(mmcbus, dev); 1418 return (EIO); 1419 } 1420 block = mmcsd_rw(part, &bp); 1421 MMCBUS_RELEASE_BUS(mmcbus, dev); 1422 return ((end < block) ? EIO : 0); 1423 } 1424 1425 static void 1426 mmcsd_task(void *arg) 1427 { 1428 daddr_t block, end; 1429 struct mmcsd_part *part; 1430 struct mmcsd_softc *sc; 1431 struct bio *bp; 1432 device_t dev, mmcbus; 1433 int bio_error, err, sz; 1434 1435 part = arg; 1436 sc = part->sc; 1437 dev = sc->dev; 1438 mmcbus = sc->mmcbus; 1439 1440 while (1) { 1441 bio_error = 0; 1442 MMCSD_DISK_LOCK(part); 1443 do { 1444 if (part->running == 0) 1445 goto out; 1446 bp = bioq_takefirst(&part->bio_queue); 1447 if (bp == NULL) 1448 msleep(part, &part->disk_mtx, PRIBIO, 1449 "mmcsd disk jobqueue", 0); 1450 } while (bp == NULL); 1451 MMCSD_DISK_UNLOCK(part); 1452 if (__predict_false(bp->bio_cmd == BIO_FLUSH)) { 1453 if (mmcsd_flush_cache(sc) != MMC_ERR_NONE) { 1454 bp->bio_error = EIO; 1455 bp->bio_flags |= BIO_ERROR; 1456 } 1457 biodone(bp); 1458 continue; 1459 } 1460 if (bp->bio_cmd != BIO_READ && part->ro) { 1461 bp->bio_error = EROFS; 1462 bp->bio_resid = bp->bio_bcount; 1463 bp->bio_flags |= BIO_ERROR; 1464 biodone(bp); 1465 continue; 1466 } 1467 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 1468 sz = part->disk->d_sectorsize; 1469 block = bp->bio_pblkno; 1470 end = bp->bio_pblkno + (bp->bio_bcount / sz); 1471 err = mmcsd_switch_part(mmcbus, dev, sc->rca, part->type); 1472 if (err != MMC_ERR_NONE) { 1473 if (ppsratecheck(&sc->log_time, &sc->log_count, 1474 LOG_PPS)) 1475 device_printf(dev, "Partition switch error\n"); 1476 goto release; 1477 } 1478 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { 1479 /* Access to the remaining erase block obsoletes it. */ 1480 if (block < part->eend && end > part->eblock) 1481 part->eblock = part->eend = 0; 1482 block = mmcsd_rw(part, bp); 1483 } else if (bp->bio_cmd == BIO_DELETE) 1484 block = mmcsd_delete(part, bp); 1485 else 1486 bio_error = EOPNOTSUPP; 1487 release: 1488 MMCBUS_RELEASE_BUS(mmcbus, dev); 1489 if (block < end) { 1490 bp->bio_error = (bio_error == 0) ? EIO : bio_error; 1491 bp->bio_resid = (end - block) * sz; 1492 bp->bio_flags |= BIO_ERROR; 1493 } else 1494 bp->bio_resid = 0; 1495 biodone(bp); 1496 } 1497 out: 1498 /* tell parent we're done */ 1499 part->running = -1; 1500 MMCSD_DISK_UNLOCK(part); 1501 wakeup(part); 1502 1503 kproc_exit(0); 1504 } 1505 1506 static int 1507 mmcsd_bus_bit_width(device_t dev) 1508 { 1509 1510 if (mmc_get_bus_width(dev) == bus_width_1) 1511 return (1); 1512 if (mmc_get_bus_width(dev) == bus_width_4) 1513 return (4); 1514 return (8); 1515 } 1516 1517 static int 1518 mmcsd_flush_cache(struct mmcsd_softc *sc) 1519 { 1520 device_t dev, mmcbus; 1521 int err; 1522 1523 if ((sc->flags & MMCSD_FLUSH_CACHE) == 0) 1524 return (MMC_ERR_NONE); 1525 1526 dev = sc->dev; 1527 mmcbus = sc->mmcbus; 1528 MMCBUS_ACQUIRE_BUS(mmcbus, dev); 1529 if ((sc->flags & MMCSD_DIRTY) == 0) { 1530 MMCBUS_RELEASE_BUS(mmcbus, dev); 1531 return (MMC_ERR_NONE); 1532 } 1533 err = mmc_switch(mmcbus, dev, sc->rca, EXT_CSD_CMD_SET_NORMAL, 1534 EXT_CSD_FLUSH_CACHE, EXT_CSD_FLUSH_CACHE_FLUSH, 60 * 1000, true); 1535 if (err == MMC_ERR_NONE) 1536 sc->flags &= ~MMCSD_DIRTY; 1537 MMCBUS_RELEASE_BUS(mmcbus, dev); 1538 return (err); 1539 } 1540 1541 static device_method_t mmcsd_methods[] = { 1542 DEVMETHOD(device_probe, mmcsd_probe), 1543 DEVMETHOD(device_attach, mmcsd_attach), 1544 DEVMETHOD(device_detach, mmcsd_detach), 1545 DEVMETHOD(device_shutdown, mmcsd_shutdown), 1546 DEVMETHOD(device_suspend, mmcsd_suspend), 1547 DEVMETHOD(device_resume, mmcsd_resume), 1548 DEVMETHOD_END 1549 }; 1550 1551 static driver_t mmcsd_driver = { 1552 "mmcsd", 1553 mmcsd_methods, 1554 sizeof(struct mmcsd_softc), 1555 }; 1556 1557 static int 1558 mmcsd_handler(module_t mod __unused, int what, void *arg __unused) 1559 { 1560 1561 switch (what) { 1562 case MOD_LOAD: 1563 flash_register_slicer(mmcsd_slicer, FLASH_SLICES_TYPE_MMC, 1564 TRUE); 1565 return (0); 1566 case MOD_UNLOAD: 1567 flash_register_slicer(NULL, FLASH_SLICES_TYPE_MMC, TRUE); 1568 return (0); 1569 } 1570 return (0); 1571 } 1572 1573 DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_handler, NULL); 1574 MODULE_DEPEND(mmcsd, g_flashmap, 0, 0, 0); 1575 MMC_DEPEND(mmcsd);
Cache object: c5bf7a381d0459e6c1d8060b6ec92a4d
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