| 1 | |
| 2 | |
| 3 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
|
| 4 |
|
| 5 | #include <linux/kstrtox.h>
|
| 6 | #include <linux/module.h>
|
| 7 | #include <linux/device.h>
|
| 8 | #include <linux/sort.h>
|
| 9 | #include <linux/slab.h>
|
| 10 | #include <linux/list.h>
|
| 11 | #include <linux/nd.h>
|
| 12 | #include "nd-core.h"
|
| 13 | #include "pmem.h"
|
| 14 | #include "pfn.h"
|
| 15 | #include "nd.h"
|
| 16 |
|
| 17 | static void namespace_io_release(struct device *dev)
|
| 18 | {
|
| 19 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
| 20 |
|
| 21 | kfree(nsio);
|
| 22 | }
|
| 23 |
|
| 24 | static void namespace_pmem_release(struct device *dev)
|
| 25 | {
|
| 26 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 27 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 28 |
|
| 29 | if (nspm->id >= 0)
|
| 30 | ida_free(&nd_region->ns_ida, nspm->id);
|
| 31 | kfree(nspm->alt_name);
|
| 32 | kfree(nspm->uuid);
|
| 33 | kfree(nspm);
|
| 34 | }
|
| 35 |
|
| 36 | static bool is_namespace_pmem(const struct device *dev);
|
| 37 | static bool is_namespace_io(const struct device *dev);
|
| 38 |
|
| 39 | static int is_uuid_busy(struct device *dev, void *data)
|
| 40 | {
|
| 41 | uuid_t *uuid1 = data, *uuid2 = NULL;
|
| 42 |
|
| 43 | if (is_namespace_pmem(dev)) {
|
| 44 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 45 |
|
| 46 | uuid2 = nspm->uuid;
|
| 47 | } else if (is_nd_btt(dev)) {
|
| 48 | struct nd_btt *nd_btt = to_nd_btt(dev);
|
| 49 |
|
| 50 | uuid2 = nd_btt->uuid;
|
| 51 | } else if (is_nd_pfn(dev)) {
|
| 52 | struct nd_pfn *nd_pfn = to_nd_pfn(dev);
|
| 53 |
|
| 54 | uuid2 = nd_pfn->uuid;
|
| 55 | }
|
| 56 |
|
| 57 | if (uuid2 && uuid_equal(uuid1, uuid2))
|
| 58 | return -EBUSY;
|
| 59 |
|
| 60 | return 0;
|
| 61 | }
|
| 62 |
|
| 63 | static int is_namespace_uuid_busy(struct device *dev, void *data)
|
| 64 | {
|
| 65 | if (is_nd_region(dev))
|
| 66 | return device_for_each_child(dev, data, is_uuid_busy);
|
| 67 | return 0;
|
| 68 | }
|
| 69 |
|
| 70 | |
| 71 | * nd_is_uuid_unique - verify that no other namespace has @uuid
|
| 72 | * @dev: any device on a nvdimm_bus
|
| 73 | * @uuid: uuid to check
|
| 74 | *
|
| 75 | * Returns: %true if the uuid is unique, %false if not
|
| 76 |
|
| 77 | bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid)
|
| 78 | {
|
| 79 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
|
| 80 |
|
| 81 | if (!nvdimm_bus)
|
| 82 | return false;
|
| 83 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev));
|
| 84 | if (device_for_each_child(&nvdimm_bus->dev, uuid,
|
| 85 | is_namespace_uuid_busy) != 0)
|
| 86 | return false;
|
| 87 | return true;
|
| 88 | }
|
| 89 |
|
| 90 | bool pmem_should_map_pages(struct device *dev)
|
| 91 | {
|
| 92 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 93 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 94 | struct nd_namespace_io *nsio;
|
| 95 |
|
| 96 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
|
| 97 | return false;
|
| 98 |
|
| 99 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags))
|
| 100 | return false;
|
| 101 |
|
| 102 | if (is_nd_pfn(dev) || is_nd_btt(dev))
|
| 103 | return false;
|
| 104 |
|
| 105 | if (ndns->force_raw)
|
| 106 | return false;
|
| 107 |
|
| 108 | nsio = to_nd_namespace_io(dev);
|
| 109 | if (region_intersects(nsio->res.start, resource_size(&nsio->res),
|
| 110 | IORESOURCE_SYSTEM_RAM,
|
| 111 | IORES_DESC_NONE) == REGION_MIXED)
|
| 112 | return false;
|
| 113 |
|
| 114 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
|
| 115 | }
|
| 116 | EXPORT_SYMBOL(pmem_should_map_pages);
|
| 117 |
|
| 118 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns)
|
| 119 | {
|
| 120 | if (is_namespace_pmem(&ndns->dev)) {
|
| 121 | struct nd_namespace_pmem *nspm;
|
| 122 |
|
| 123 | nspm = to_nd_namespace_pmem(&ndns->dev);
|
| 124 | if (nspm->lbasize == 0 || nspm->lbasize == 512)
|
| 125 | ;
|
| 126 | else if (nspm->lbasize == 4096)
|
| 127 | return 4096;
|
| 128 | else
|
| 129 | dev_WARN(&ndns->dev, "unsupported sector size: %ld\n",
|
| 130 | nspm->lbasize);
|
| 131 | }
|
| 132 |
|
| 133 | |
| 134 | * There is no namespace label (is_namespace_io()), or the label
|
| 135 | * indicates the default sector size.
|
| 136 |
|
| 137 | return 512;
|
| 138 | }
|
| 139 | EXPORT_SYMBOL(pmem_sector_size);
|
| 140 |
|
| 141 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
|
| 142 | char *name)
|
| 143 | {
|
| 144 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
|
| 145 | const char *suffix = NULL;
|
| 146 |
|
| 147 | if (ndns->claim && is_nd_btt(ndns->claim))
|
| 148 | suffix = "s";
|
| 149 |
|
| 150 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) {
|
| 151 | int nsidx = 0;
|
| 152 |
|
| 153 | if (is_namespace_pmem(&ndns->dev)) {
|
| 154 | struct nd_namespace_pmem *nspm;
|
| 155 |
|
| 156 | nspm = to_nd_namespace_pmem(&ndns->dev);
|
| 157 | nsidx = nspm->id;
|
| 158 | }
|
| 159 |
|
| 160 | if (nsidx)
|
| 161 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx,
|
| 162 | suffix ? suffix : "");
|
| 163 | else
|
| 164 | sprintf(name, "pmem%d%s", nd_region->id,
|
| 165 | suffix ? suffix : "");
|
| 166 | } else {
|
| 167 | return NULL;
|
| 168 | }
|
| 169 |
|
| 170 | return name;
|
| 171 | }
|
| 172 | EXPORT_SYMBOL(nvdimm_namespace_disk_name);
|
| 173 |
|
| 174 | const uuid_t *nd_dev_to_uuid(struct device *dev)
|
| 175 | {
|
| 176 | if (dev && is_namespace_pmem(dev)) {
|
| 177 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 178 |
|
| 179 | return nspm->uuid;
|
| 180 | }
|
| 181 | return &uuid_null;
|
| 182 | }
|
| 183 | EXPORT_SYMBOL(nd_dev_to_uuid);
|
| 184 |
|
| 185 | static ssize_t nstype_show(struct device *dev,
|
| 186 | struct device_attribute *attr, char *buf)
|
| 187 | {
|
| 188 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 189 |
|
| 190 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region));
|
| 191 | }
|
| 192 | static DEVICE_ATTR_RO(nstype);
|
| 193 |
|
| 194 | static ssize_t __alt_name_store(struct device *dev, const char *buf,
|
| 195 | const size_t len)
|
| 196 | {
|
| 197 | char *input, *pos, *alt_name, **ns_altname;
|
| 198 | ssize_t rc;
|
| 199 |
|
| 200 | if (is_namespace_pmem(dev)) {
|
| 201 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 202 |
|
| 203 | ns_altname = &nspm->alt_name;
|
| 204 | } else
|
| 205 | return -ENXIO;
|
| 206 |
|
| 207 | if (dev->driver || to_ndns(dev)->claim)
|
| 208 | return -EBUSY;
|
| 209 |
|
| 210 | input = kstrndup(buf, len, GFP_KERNEL);
|
| 211 | if (!input)
|
| 212 | return -ENOMEM;
|
| 213 |
|
| 214 | pos = strim(input);
|
| 215 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) {
|
| 216 | rc = -EINVAL;
|
| 217 | goto out;
|
| 218 | }
|
| 219 |
|
| 220 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL);
|
| 221 | if (!alt_name) {
|
| 222 | rc = -ENOMEM;
|
| 223 | goto out;
|
| 224 | }
|
| 225 | kfree(*ns_altname);
|
| 226 | *ns_altname = alt_name;
|
| 227 | sprintf(*ns_altname, "%s", pos);
|
| 228 | rc = len;
|
| 229 |
|
| 230 | out:
|
| 231 | kfree(input);
|
| 232 | return rc;
|
| 233 | }
|
| 234 |
|
| 235 | static int nd_namespace_label_update(struct nd_region *nd_region,
|
| 236 | struct device *dev)
|
| 237 | {
|
| 238 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim,
|
| 239 | "namespace must be idle during label update\n");
|
| 240 | if (dev->driver || to_ndns(dev)->claim)
|
| 241 | return 0;
|
| 242 |
|
| 243 | |
| 244 | * Only allow label writes that will result in a valid namespace
|
| 245 | * or deletion of an existing namespace.
|
| 246 |
|
| 247 | if (is_namespace_pmem(dev)) {
|
| 248 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 249 | resource_size_t size = resource_size(&nspm->nsio.res);
|
| 250 |
|
| 251 | if (size == 0 && nspm->uuid)
|
| 252 | ;
|
| 253 | else if (!nspm->uuid)
|
| 254 | return 0;
|
| 255 |
|
| 256 | return nd_pmem_namespace_label_update(nd_region, nspm, size);
|
| 257 | } else
|
| 258 | return -ENXIO;
|
| 259 | }
|
| 260 |
|
| 261 | static ssize_t alt_name_store(struct device *dev,
|
| 262 | struct device_attribute *attr, const char *buf, size_t len)
|
| 263 | {
|
| 264 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 265 | ssize_t rc;
|
| 266 |
|
| 267 | guard(device)(dev);
|
| 268 | guard(nvdimm_bus)(dev);
|
| 269 | wait_nvdimm_bus_probe_idle(dev);
|
| 270 | rc = __alt_name_store(dev, buf, len);
|
| 271 | if (rc >= 0)
|
| 272 | rc = nd_namespace_label_update(nd_region, dev);
|
| 273 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc);
|
| 274 |
|
| 275 | return rc < 0 ? rc : len;
|
| 276 | }
|
| 277 |
|
| 278 | static ssize_t alt_name_show(struct device *dev,
|
| 279 | struct device_attribute *attr, char *buf)
|
| 280 | {
|
| 281 | char *ns_altname;
|
| 282 |
|
| 283 | if (is_namespace_pmem(dev)) {
|
| 284 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 285 |
|
| 286 | ns_altname = nspm->alt_name;
|
| 287 | } else
|
| 288 | return -ENXIO;
|
| 289 |
|
| 290 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : "");
|
| 291 | }
|
| 292 | static DEVICE_ATTR_RW(alt_name);
|
| 293 |
|
| 294 | static int scan_free(struct nd_region *nd_region,
|
| 295 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
|
| 296 | resource_size_t n)
|
| 297 | {
|
| 298 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 299 | int rc = 0;
|
| 300 |
|
| 301 | while (n) {
|
| 302 | struct resource *res, *last;
|
| 303 |
|
| 304 | last = NULL;
|
| 305 | for_each_dpa_resource(ndd, res)
|
| 306 | if (strcmp(res->name, label_id->id) == 0)
|
| 307 | last = res;
|
| 308 | res = last;
|
| 309 | if (!res)
|
| 310 | return 0;
|
| 311 |
|
| 312 | if (n >= resource_size(res)) {
|
| 313 | n -= resource_size(res);
|
| 314 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc);
|
| 315 | nvdimm_free_dpa(ndd, res);
|
| 316 |
|
| 317 | continue;
|
| 318 | }
|
| 319 |
|
| 320 | rc = adjust_resource(res, res->start, resource_size(res) - n);
|
| 321 | if (rc == 0)
|
| 322 | res->flags |= DPA_RESOURCE_ADJUSTED;
|
| 323 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc);
|
| 324 | break;
|
| 325 | }
|
| 326 |
|
| 327 | return rc;
|
| 328 | }
|
| 329 |
|
| 330 | |
| 331 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id
|
| 332 | * @nd_region: the set of dimms to reclaim @n bytes from
|
| 333 | * @label_id: unique identifier for the namespace consuming this dpa range
|
| 334 | * @n: number of bytes per-dimm to release
|
| 335 | *
|
| 336 | * Assumes resources are ordered. Starting from the end try to
|
| 337 | * adjust_resource() the allocation to @n, but if @n is larger than the
|
| 338 | * allocation delete it and find the 'new' last allocation in the label
|
| 339 | * set.
|
| 340 | *
|
| 341 | * Returns: %0 on success on -errno on error
|
| 342 |
|
| 343 | static int shrink_dpa_allocation(struct nd_region *nd_region,
|
| 344 | struct nd_label_id *label_id, resource_size_t n)
|
| 345 | {
|
| 346 | int i;
|
| 347 |
|
| 348 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 349 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 350 | int rc;
|
| 351 |
|
| 352 | rc = scan_free(nd_region, nd_mapping, label_id, n);
|
| 353 | if (rc)
|
| 354 | return rc;
|
| 355 | }
|
| 356 |
|
| 357 | return 0;
|
| 358 | }
|
| 359 |
|
| 360 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
|
| 361 | struct nd_region *nd_region, struct nd_mapping *nd_mapping,
|
| 362 | resource_size_t n)
|
| 363 | {
|
| 364 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 365 | struct resource *res;
|
| 366 | int rc = 0;
|
| 367 |
|
| 368 |
|
| 369 | res = nvdimm_allocate_dpa(ndd, label_id, nd_mapping->start, n);
|
| 370 | if (!res)
|
| 371 | rc = -EBUSY;
|
| 372 |
|
| 373 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc);
|
| 374 | return rc ? n : 0;
|
| 375 | }
|
| 376 |
|
| 377 |
|
| 378 | |
| 379 | * space_valid() - validate free dpa space against constraints
|
| 380 | * @nd_region: hosting region of the free space
|
| 381 | * @ndd: dimm device data for debug
|
| 382 | * @label_id: namespace id to allocate space
|
| 383 | * @prev: potential allocation that precedes free space
|
| 384 | * @next: allocation that follows the given free space range
|
| 385 | * @exist: first allocation with same id in the mapping
|
| 386 | * @n: range that must satisfied for pmem allocations
|
| 387 | * @valid: free space range to validate
|
| 388 | *
|
| 389 | * BLK-space is valid as long as it does not precede a PMEM
|
| 390 | * allocation in a given region. PMEM-space must be contiguous
|
| 391 | * and adjacent to an existing allocation (if one
|
| 392 | * exists). If reserving PMEM any space is valid.
|
| 393 |
|
| 394 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd,
|
| 395 | struct nd_label_id *label_id, struct resource *prev,
|
| 396 | struct resource *next, struct resource *exist,
|
| 397 | resource_size_t n, struct resource *valid)
|
| 398 | {
|
| 399 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
|
| 400 | unsigned long align;
|
| 401 |
|
| 402 | align = nd_region->align / nd_region->ndr_mappings;
|
| 403 | valid->start = ALIGN(valid->start, align);
|
| 404 | valid->end = ALIGN_DOWN(valid->end + 1, align) - 1;
|
| 405 |
|
| 406 | if (valid->start >= valid->end)
|
| 407 | goto invalid;
|
| 408 |
|
| 409 | if (is_reserve)
|
| 410 | return;
|
| 411 |
|
| 412 |
|
| 413 | if (resource_size(valid) < n)
|
| 414 | goto invalid;
|
| 415 |
|
| 416 |
|
| 417 | if (!exist)
|
| 418 | return;
|
| 419 |
|
| 420 |
|
| 421 | if (valid->start == exist->end + 1
|
| 422 | || valid->end == exist->start - 1)
|
| 423 | return;
|
| 424 |
|
| 425 | invalid:
|
| 426 |
|
| 427 | valid->end = valid->start - 1;
|
| 428 | }
|
| 429 |
|
| 430 | enum alloc_loc {
|
| 431 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER,
|
| 432 | };
|
| 433 |
|
| 434 | static resource_size_t scan_allocate(struct nd_region *nd_region,
|
| 435 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
|
| 436 | resource_size_t n)
|
| 437 | {
|
| 438 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
|
| 439 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 440 | struct resource *res, *exist = NULL, valid;
|
| 441 | const resource_size_t to_allocate = n;
|
| 442 | int first;
|
| 443 |
|
| 444 | for_each_dpa_resource(ndd, res)
|
| 445 | if (strcmp(label_id->id, res->name) == 0)
|
| 446 | exist = res;
|
| 447 |
|
| 448 | valid.start = nd_mapping->start;
|
| 449 | valid.end = mapping_end;
|
| 450 | valid.name = "free space";
|
| 451 | retry:
|
| 452 | first = 0;
|
| 453 | for_each_dpa_resource(ndd, res) {
|
| 454 | struct resource *next = res->sibling, *new_res = NULL;
|
| 455 | resource_size_t allocate, available = 0;
|
| 456 | enum alloc_loc loc = ALLOC_ERR;
|
| 457 | const char *action;
|
| 458 | int rc = 0;
|
| 459 |
|
| 460 |
|
| 461 | if (res->start > mapping_end)
|
| 462 | continue;
|
| 463 | if (res->end < nd_mapping->start)
|
| 464 | continue;
|
| 465 |
|
| 466 |
|
| 467 | if (!first++ && res->start > nd_mapping->start) {
|
| 468 | valid.start = nd_mapping->start;
|
| 469 | valid.end = res->start - 1;
|
| 470 | space_valid(nd_region, ndd, label_id, NULL, next, exist,
|
| 471 | to_allocate, &valid);
|
| 472 | available = resource_size(&valid);
|
| 473 | if (available)
|
| 474 | loc = ALLOC_BEFORE;
|
| 475 | }
|
| 476 |
|
| 477 |
|
| 478 | if (!loc && next) {
|
| 479 | valid.start = res->start + resource_size(res);
|
| 480 | valid.end = min(mapping_end, next->start - 1);
|
| 481 | space_valid(nd_region, ndd, label_id, res, next, exist,
|
| 482 | to_allocate, &valid);
|
| 483 | available = resource_size(&valid);
|
| 484 | if (available)
|
| 485 | loc = ALLOC_MID;
|
| 486 | }
|
| 487 |
|
| 488 |
|
| 489 | if (!loc && !next) {
|
| 490 | valid.start = res->start + resource_size(res);
|
| 491 | valid.end = mapping_end;
|
| 492 | space_valid(nd_region, ndd, label_id, res, next, exist,
|
| 493 | to_allocate, &valid);
|
| 494 | available = resource_size(&valid);
|
| 495 | if (available)
|
| 496 | loc = ALLOC_AFTER;
|
| 497 | }
|
| 498 |
|
| 499 | if (!loc || !available)
|
| 500 | continue;
|
| 501 | allocate = min(available, n);
|
| 502 | switch (loc) {
|
| 503 | case ALLOC_BEFORE:
|
| 504 | if (strcmp(res->name, label_id->id) == 0) {
|
| 505 |
|
| 506 | rc = adjust_resource(res, res->start - allocate,
|
| 507 | resource_size(res) + allocate);
|
| 508 | action = "cur grow up";
|
| 509 | } else
|
| 510 | action = "allocate";
|
| 511 | break;
|
| 512 | case ALLOC_MID:
|
| 513 | if (strcmp(next->name, label_id->id) == 0) {
|
| 514 |
|
| 515 | rc = adjust_resource(next, next->start
|
| 516 | - allocate, resource_size(next)
|
| 517 | + allocate);
|
| 518 | new_res = next;
|
| 519 | action = "next grow up";
|
| 520 | } else if (strcmp(res->name, label_id->id) == 0) {
|
| 521 | action = "grow down";
|
| 522 | } else
|
| 523 | action = "allocate";
|
| 524 | break;
|
| 525 | case ALLOC_AFTER:
|
| 526 | if (strcmp(res->name, label_id->id) == 0)
|
| 527 | action = "grow down";
|
| 528 | else
|
| 529 | action = "allocate";
|
| 530 | break;
|
| 531 | default:
|
| 532 | return n;
|
| 533 | }
|
| 534 |
|
| 535 | if (strcmp(action, "allocate") == 0) {
|
| 536 | new_res = nvdimm_allocate_dpa(ndd, label_id,
|
| 537 | valid.start, allocate);
|
| 538 | if (!new_res)
|
| 539 | rc = -EBUSY;
|
| 540 | } else if (strcmp(action, "grow down") == 0) {
|
| 541 |
|
| 542 | rc = adjust_resource(res, res->start, resource_size(res)
|
| 543 | + allocate);
|
| 544 | if (rc == 0)
|
| 545 | res->flags |= DPA_RESOURCE_ADJUSTED;
|
| 546 | }
|
| 547 |
|
| 548 | if (!new_res)
|
| 549 | new_res = res;
|
| 550 |
|
| 551 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n",
|
| 552 | action, loc, rc);
|
| 553 |
|
| 554 | if (rc)
|
| 555 | return n;
|
| 556 |
|
| 557 | n -= allocate;
|
| 558 | if (n) {
|
| 559 | |
| 560 | * Retry scan with newly inserted resources.
|
| 561 | * For example, if we did an ALLOC_BEFORE
|
| 562 | * insertion there may also have been space
|
| 563 | * available for an ALLOC_AFTER insertion, so we
|
| 564 | * need to check this same resource again
|
| 565 |
|
| 566 | goto retry;
|
| 567 | } else
|
| 568 | return 0;
|
| 569 | }
|
| 570 |
|
| 571 | if (n == to_allocate)
|
| 572 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n);
|
| 573 | return n;
|
| 574 | }
|
| 575 |
|
| 576 | static int merge_dpa(struct nd_region *nd_region,
|
| 577 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id)
|
| 578 | {
|
| 579 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 580 | struct resource *res;
|
| 581 |
|
| 582 | if (strncmp("pmem", label_id->id, 4) == 0)
|
| 583 | return 0;
|
| 584 | retry:
|
| 585 | for_each_dpa_resource(ndd, res) {
|
| 586 | int rc;
|
| 587 | struct resource *next = res->sibling;
|
| 588 | resource_size_t end = res->start + resource_size(res);
|
| 589 |
|
| 590 | if (!next || strcmp(res->name, label_id->id) != 0
|
| 591 | || strcmp(next->name, label_id->id) != 0
|
| 592 | || end != next->start)
|
| 593 | continue;
|
| 594 | end += resource_size(next);
|
| 595 | nvdimm_free_dpa(ndd, next);
|
| 596 | rc = adjust_resource(res, res->start, end - res->start);
|
| 597 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc);
|
| 598 | if (rc)
|
| 599 | return rc;
|
| 600 | res->flags |= DPA_RESOURCE_ADJUSTED;
|
| 601 | goto retry;
|
| 602 | }
|
| 603 |
|
| 604 | return 0;
|
| 605 | }
|
| 606 |
|
| 607 | int __reserve_free_pmem(struct device *dev, void *data)
|
| 608 | {
|
| 609 | struct nvdimm *nvdimm = data;
|
| 610 | struct nd_region *nd_region;
|
| 611 | struct nd_label_id label_id;
|
| 612 | int i;
|
| 613 |
|
| 614 | if (!is_memory(dev))
|
| 615 | return 0;
|
| 616 |
|
| 617 | nd_region = to_nd_region(dev);
|
| 618 | if (nd_region->ndr_mappings == 0)
|
| 619 | return 0;
|
| 620 |
|
| 621 | memset(&label_id, 0, sizeof(label_id));
|
| 622 | strcat(label_id.id, "pmem-reserve");
|
| 623 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 624 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 625 | resource_size_t n, rem = 0;
|
| 626 |
|
| 627 | if (nd_mapping->nvdimm != nvdimm)
|
| 628 | continue;
|
| 629 |
|
| 630 | n = nd_pmem_available_dpa(nd_region, nd_mapping);
|
| 631 | if (n == 0)
|
| 632 | return 0;
|
| 633 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n);
|
| 634 | dev_WARN_ONCE(&nd_region->dev, rem,
|
| 635 | "pmem reserve underrun: %#llx of %#llx bytes\n",
|
| 636 | (unsigned long long) n - rem,
|
| 637 | (unsigned long long) n);
|
| 638 | return rem ? -ENXIO : 0;
|
| 639 | }
|
| 640 |
|
| 641 | return 0;
|
| 642 | }
|
| 643 |
|
| 644 | void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
|
| 645 | struct nd_mapping *nd_mapping)
|
| 646 | {
|
| 647 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 648 | struct resource *res, *_res;
|
| 649 |
|
| 650 | for_each_dpa_resource_safe(ndd, res, _res)
|
| 651 | if (strcmp(res->name, "pmem-reserve") == 0)
|
| 652 | nvdimm_free_dpa(ndd, res);
|
| 653 | }
|
| 654 |
|
| 655 | |
| 656 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id
|
| 657 | * @nd_region: the set of dimms to allocate @n more bytes from
|
| 658 | * @label_id: unique identifier for the namespace consuming this dpa range
|
| 659 | * @n: number of bytes per-dimm to add to the existing allocation
|
| 660 | *
|
| 661 | * Assumes resources are ordered. For BLK regions, first consume
|
| 662 | * BLK-only available DPA free space, then consume PMEM-aliased DPA
|
| 663 | * space starting at the highest DPA. For PMEM regions start
|
| 664 | * allocations from the start of an interleave set and end at the first
|
| 665 | * BLK allocation or the end of the interleave set, whichever comes
|
| 666 | * first.
|
| 667 | *
|
| 668 | * Returns: %0 on success on -errno on error
|
| 669 |
|
| 670 | static int grow_dpa_allocation(struct nd_region *nd_region,
|
| 671 | struct nd_label_id *label_id, resource_size_t n)
|
| 672 | {
|
| 673 | int i;
|
| 674 |
|
| 675 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 676 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 677 | resource_size_t rem = n;
|
| 678 | int rc;
|
| 679 |
|
| 680 | rem = scan_allocate(nd_region, nd_mapping, label_id, rem);
|
| 681 | dev_WARN_ONCE(&nd_region->dev, rem,
|
| 682 | "allocation underrun: %#llx of %#llx bytes\n",
|
| 683 | (unsigned long long) n - rem,
|
| 684 | (unsigned long long) n);
|
| 685 | if (rem)
|
| 686 | return -ENXIO;
|
| 687 |
|
| 688 | rc = merge_dpa(nd_region, nd_mapping, label_id);
|
| 689 | if (rc)
|
| 690 | return rc;
|
| 691 | }
|
| 692 |
|
| 693 | return 0;
|
| 694 | }
|
| 695 |
|
| 696 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
|
| 697 | struct nd_namespace_pmem *nspm, resource_size_t size)
|
| 698 | {
|
| 699 | struct resource *res = &nspm->nsio.res;
|
| 700 | resource_size_t offset = 0;
|
| 701 |
|
| 702 | if (size && !nspm->uuid) {
|
| 703 | WARN_ON_ONCE(1);
|
| 704 | size = 0;
|
| 705 | }
|
| 706 |
|
| 707 | if (size && nspm->uuid) {
|
| 708 | struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
| 709 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 710 | struct nd_label_id label_id;
|
| 711 | struct resource *res;
|
| 712 |
|
| 713 | if (!ndd) {
|
| 714 | size = 0;
|
| 715 | goto out;
|
| 716 | }
|
| 717 |
|
| 718 | nd_label_gen_id(&label_id, nspm->uuid, 0);
|
| 719 |
|
| 720 |
|
| 721 | for_each_dpa_resource(ndd, res)
|
| 722 | if (strcmp(res->name, label_id.id) == 0) {
|
| 723 | offset = (res->start - nd_mapping->start)
|
| 724 | * nd_region->ndr_mappings;
|
| 725 | goto out;
|
| 726 | }
|
| 727 |
|
| 728 | WARN_ON_ONCE(1);
|
| 729 | size = 0;
|
| 730 | }
|
| 731 |
|
| 732 | out:
|
| 733 | res->start = nd_region->ndr_start + offset;
|
| 734 | res->end = res->start + size - 1;
|
| 735 | }
|
| 736 |
|
| 737 | static bool uuid_not_set(const uuid_t *uuid, struct device *dev,
|
| 738 | const char *where)
|
| 739 | {
|
| 740 | if (!uuid) {
|
| 741 | dev_dbg(dev, "%s: uuid not set\n", where);
|
| 742 | return true;
|
| 743 | }
|
| 744 | return false;
|
| 745 | }
|
| 746 |
|
| 747 | static ssize_t __size_store(struct device *dev, unsigned long long val)
|
| 748 | {
|
| 749 | resource_size_t allocated = 0, available = 0;
|
| 750 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 751 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 752 | struct nd_mapping *nd_mapping;
|
| 753 | struct nvdimm_drvdata *ndd;
|
| 754 | struct nd_label_id label_id;
|
| 755 | u32 flags = 0, remainder;
|
| 756 | int rc, i, id = -1;
|
| 757 | uuid_t *uuid = NULL;
|
| 758 |
|
| 759 | if (dev->driver || ndns->claim)
|
| 760 | return -EBUSY;
|
| 761 |
|
| 762 | if (is_namespace_pmem(dev)) {
|
| 763 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 764 |
|
| 765 | uuid = nspm->uuid;
|
| 766 | id = nspm->id;
|
| 767 | }
|
| 768 |
|
| 769 | |
| 770 | * We need a uuid for the allocation-label and dimm(s) on which
|
| 771 | * to store the label.
|
| 772 |
|
| 773 | if (uuid_not_set(uuid, dev, __func__))
|
| 774 | return -ENXIO;
|
| 775 | if (nd_region->ndr_mappings == 0) {
|
| 776 | dev_dbg(dev, "not associated with dimm(s)\n");
|
| 777 | return -ENXIO;
|
| 778 | }
|
| 779 |
|
| 780 | div_u64_rem(val, nd_region->align, &remainder);
|
| 781 | if (remainder) {
|
| 782 | dev_dbg(dev, "%llu is not %ldK aligned\n", val,
|
| 783 | nd_region->align / SZ_1K);
|
| 784 | return -EINVAL;
|
| 785 | }
|
| 786 |
|
| 787 | nd_label_gen_id(&label_id, uuid, flags);
|
| 788 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 789 | nd_mapping = &nd_region->mapping[i];
|
| 790 | ndd = to_ndd(nd_mapping);
|
| 791 |
|
| 792 | |
| 793 | * All dimms in an interleave set, need to be enabled
|
| 794 | * for the size to be changed.
|
| 795 |
|
| 796 | if (!ndd)
|
| 797 | return -ENXIO;
|
| 798 |
|
| 799 | allocated += nvdimm_allocated_dpa(ndd, &label_id);
|
| 800 | }
|
| 801 | available = nd_region_allocatable_dpa(nd_region);
|
| 802 |
|
| 803 | if (val > available + allocated)
|
| 804 | return -ENOSPC;
|
| 805 |
|
| 806 | if (val == allocated)
|
| 807 | return 0;
|
| 808 |
|
| 809 | val = div_u64(val, nd_region->ndr_mappings);
|
| 810 | allocated = div_u64(allocated, nd_region->ndr_mappings);
|
| 811 | if (val < allocated)
|
| 812 | rc = shrink_dpa_allocation(nd_region, &label_id,
|
| 813 | allocated - val);
|
| 814 | else
|
| 815 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated);
|
| 816 |
|
| 817 | if (rc)
|
| 818 | return rc;
|
| 819 |
|
| 820 | if (is_namespace_pmem(dev)) {
|
| 821 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 822 |
|
| 823 | nd_namespace_pmem_set_resource(nd_region, nspm,
|
| 824 | val * nd_region->ndr_mappings);
|
| 825 | }
|
| 826 |
|
| 827 | |
| 828 | * Try to delete the namespace if we deleted all of its
|
| 829 | * allocation, this is not the seed or 0th device for the
|
| 830 | * region, and it is not actively claimed by a btt, pfn, or dax
|
| 831 | * instance.
|
| 832 |
|
| 833 | if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim)
|
| 834 | nd_device_unregister(dev, ND_ASYNC);
|
| 835 |
|
| 836 | return rc;
|
| 837 | }
|
| 838 |
|
| 839 | static ssize_t size_store(struct device *dev,
|
| 840 | struct device_attribute *attr, const char *buf, size_t len)
|
| 841 | {
|
| 842 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 843 | unsigned long long val;
|
| 844 | int rc;
|
| 845 |
|
| 846 | rc = kstrtoull(buf, 0, &val);
|
| 847 | if (rc)
|
| 848 | return rc;
|
| 849 |
|
| 850 | guard(device)(dev);
|
| 851 | guard(nvdimm_bus)(dev);
|
| 852 | wait_nvdimm_bus_probe_idle(dev);
|
| 853 | rc = __size_store(dev, val);
|
| 854 | if (rc >= 0)
|
| 855 | rc = nd_namespace_label_update(nd_region, dev);
|
| 856 |
|
| 857 |
|
| 858 | if (rc == 0 && val == 0 && is_namespace_pmem(dev)) {
|
| 859 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 860 |
|
| 861 | kfree(nspm->uuid);
|
| 862 | nspm->uuid = NULL;
|
| 863 | }
|
| 864 |
|
| 865 | dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
|
| 866 |
|
| 867 | return rc < 0 ? rc : len;
|
| 868 | }
|
| 869 |
|
| 870 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
|
| 871 | {
|
| 872 | struct device *dev = &ndns->dev;
|
| 873 |
|
| 874 | if (is_namespace_pmem(dev)) {
|
| 875 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 876 |
|
| 877 | return resource_size(&nspm->nsio.res);
|
| 878 | } else if (is_namespace_io(dev)) {
|
| 879 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
| 880 |
|
| 881 | return resource_size(&nsio->res);
|
| 882 | } else
|
| 883 | WARN_ONCE(1, "unknown namespace type\n");
|
| 884 | return 0;
|
| 885 | }
|
| 886 |
|
| 887 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
|
| 888 | {
|
| 889 | guard(nvdimm_bus)(&ndns->dev);
|
| 890 | return __nvdimm_namespace_capacity(ndns);
|
| 891 | }
|
| 892 | EXPORT_SYMBOL(nvdimm_namespace_capacity);
|
| 893 |
|
| 894 | bool nvdimm_namespace_locked(struct nd_namespace_common *ndns)
|
| 895 | {
|
| 896 | int i;
|
| 897 | bool locked = false;
|
| 898 | struct device *dev = &ndns->dev;
|
| 899 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 900 |
|
| 901 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 902 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 903 | struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
| 904 |
|
| 905 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) {
|
| 906 | dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm));
|
| 907 | locked = true;
|
| 908 | }
|
| 909 | }
|
| 910 | return locked;
|
| 911 | }
|
| 912 | EXPORT_SYMBOL(nvdimm_namespace_locked);
|
| 913 |
|
| 914 | static ssize_t size_show(struct device *dev,
|
| 915 | struct device_attribute *attr, char *buf)
|
| 916 | {
|
| 917 | return sprintf(buf, "%llu\n", (unsigned long long)
|
| 918 | nvdimm_namespace_capacity(to_ndns(dev)));
|
| 919 | }
|
| 920 | static DEVICE_ATTR(size, 0444, size_show, size_store);
|
| 921 |
|
| 922 | static uuid_t *namespace_to_uuid(struct device *dev)
|
| 923 | {
|
| 924 | if (is_namespace_pmem(dev)) {
|
| 925 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 926 |
|
| 927 | return nspm->uuid;
|
| 928 | }
|
| 929 | return ERR_PTR(-ENXIO);
|
| 930 | }
|
| 931 |
|
| 932 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
|
| 933 | char *buf)
|
| 934 | {
|
| 935 | uuid_t *uuid = namespace_to_uuid(dev);
|
| 936 |
|
| 937 | if (IS_ERR(uuid))
|
| 938 | return PTR_ERR(uuid);
|
| 939 | if (uuid)
|
| 940 | return sprintf(buf, "%pUb\n", uuid);
|
| 941 | return sprintf(buf, "\n");
|
| 942 | }
|
| 943 |
|
| 944 | |
| 945 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming"
|
| 946 | * @nd_region: parent region so we can updates all dimms in the set
|
| 947 | * @dev: namespace type for generating label_id
|
| 948 | * @new_uuid: incoming uuid
|
| 949 | * @old_uuid: reference to the uuid storage location in the namespace object
|
| 950 | *
|
| 951 | * Returns: %0 on success on -errno on error
|
| 952 |
|
| 953 | static int namespace_update_uuid(struct nd_region *nd_region,
|
| 954 | struct device *dev, uuid_t *new_uuid,
|
| 955 | uuid_t **old_uuid)
|
| 956 | {
|
| 957 | struct nd_label_id old_label_id;
|
| 958 | struct nd_label_id new_label_id;
|
| 959 | int i;
|
| 960 |
|
| 961 | if (!nd_is_uuid_unique(dev, new_uuid))
|
| 962 | return -EINVAL;
|
| 963 |
|
| 964 | if (*old_uuid == NULL)
|
| 965 | goto out;
|
| 966 |
|
| 967 | |
| 968 | * If we've already written a label with this uuid, then it's
|
| 969 | * too late to rename because we can't reliably update the uuid
|
| 970 | * without losing the old namespace. Userspace must delete this
|
| 971 | * namespace to abandon the old uuid.
|
| 972 |
|
| 973 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 974 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 975 |
|
| 976 | |
| 977 | * This check by itself is sufficient because old_uuid
|
| 978 | * would be NULL above if this uuid did not exist in the
|
| 979 | * currently written set.
|
| 980 | *
|
| 981 | * FIXME: can we delete uuid with zero dpa allocated?
|
| 982 |
|
| 983 | if (list_empty(&nd_mapping->labels))
|
| 984 | return -EBUSY;
|
| 985 | }
|
| 986 |
|
| 987 | nd_label_gen_id(&old_label_id, *old_uuid, 0);
|
| 988 | nd_label_gen_id(&new_label_id, new_uuid, 0);
|
| 989 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 990 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 991 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 992 | struct nd_label_ent *label_ent;
|
| 993 | struct resource *res;
|
| 994 |
|
| 995 | for_each_dpa_resource(ndd, res)
|
| 996 | if (strcmp(res->name, old_label_id.id) == 0)
|
| 997 | sprintf((void *) res->name, "%s",
|
| 998 | new_label_id.id);
|
| 999 |
|
| 1000 | mutex_lock(&nd_mapping->lock);
|
| 1001 | list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
| 1002 | struct nd_namespace_label *nd_label = label_ent->label;
|
| 1003 | struct nd_label_id label_id;
|
| 1004 | uuid_t uuid;
|
| 1005 |
|
| 1006 | if (!nd_label)
|
| 1007 | continue;
|
| 1008 | nsl_get_uuid(ndd, nd_label, &uuid);
|
| 1009 | nd_label_gen_id(&label_id, &uuid,
|
| 1010 | nsl_get_flags(ndd, nd_label));
|
| 1011 | if (strcmp(old_label_id.id, label_id.id) == 0)
|
| 1012 | set_bit(ND_LABEL_REAP, &label_ent->flags);
|
| 1013 | }
|
| 1014 | mutex_unlock(&nd_mapping->lock);
|
| 1015 | }
|
| 1016 | kfree(*old_uuid);
|
| 1017 | out:
|
| 1018 | *old_uuid = new_uuid;
|
| 1019 | return 0;
|
| 1020 | }
|
| 1021 |
|
| 1022 | static ssize_t uuid_store(struct device *dev,
|
| 1023 | struct device_attribute *attr, const char *buf, size_t len)
|
| 1024 | {
|
| 1025 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 1026 | uuid_t *uuid = NULL;
|
| 1027 | uuid_t **ns_uuid;
|
| 1028 | ssize_t rc = 0;
|
| 1029 |
|
| 1030 | if (is_namespace_pmem(dev)) {
|
| 1031 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 1032 |
|
| 1033 | ns_uuid = &nspm->uuid;
|
| 1034 | } else
|
| 1035 | return -ENXIO;
|
| 1036 |
|
| 1037 | guard(device)(dev);
|
| 1038 | guard(nvdimm_bus)(dev);
|
| 1039 | wait_nvdimm_bus_probe_idle(dev);
|
| 1040 | if (to_ndns(dev)->claim)
|
| 1041 | rc = -EBUSY;
|
| 1042 | if (rc >= 0)
|
| 1043 | rc = nd_uuid_store(dev, &uuid, buf, len);
|
| 1044 | if (rc >= 0)
|
| 1045 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid);
|
| 1046 | if (rc >= 0)
|
| 1047 | rc = nd_namespace_label_update(nd_region, dev);
|
| 1048 | else
|
| 1049 | kfree(uuid);
|
| 1050 | dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
|
| 1051 | buf[len - 1] == '\n' ? "" : "\n");
|
| 1052 |
|
| 1053 | return rc < 0 ? rc : len;
|
| 1054 | }
|
| 1055 | static DEVICE_ATTR_RW(uuid);
|
| 1056 |
|
| 1057 | static ssize_t resource_show(struct device *dev,
|
| 1058 | struct device_attribute *attr, char *buf)
|
| 1059 | {
|
| 1060 | struct resource *res;
|
| 1061 |
|
| 1062 | if (is_namespace_pmem(dev)) {
|
| 1063 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 1064 |
|
| 1065 | res = &nspm->nsio.res;
|
| 1066 | } else if (is_namespace_io(dev)) {
|
| 1067 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
| 1068 |
|
| 1069 | res = &nsio->res;
|
| 1070 | } else
|
| 1071 | return -ENXIO;
|
| 1072 |
|
| 1073 |
|
| 1074 | if (resource_size(res) == 0)
|
| 1075 | return -ENXIO;
|
| 1076 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start);
|
| 1077 | }
|
| 1078 | static DEVICE_ATTR_ADMIN_RO(resource);
|
| 1079 |
|
| 1080 | static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 };
|
| 1081 |
|
| 1082 | static ssize_t sector_size_show(struct device *dev,
|
| 1083 | struct device_attribute *attr, char *buf)
|
| 1084 | {
|
| 1085 | if (is_namespace_pmem(dev)) {
|
| 1086 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 1087 |
|
| 1088 | return nd_size_select_show(nspm->lbasize,
|
| 1089 | pmem_lbasize_supported, buf);
|
| 1090 | }
|
| 1091 | return -ENXIO;
|
| 1092 | }
|
| 1093 |
|
| 1094 | static ssize_t sector_size_store(struct device *dev,
|
| 1095 | struct device_attribute *attr, const char *buf, size_t len)
|
| 1096 | {
|
| 1097 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 1098 | const unsigned long *supported;
|
| 1099 | unsigned long *lbasize;
|
| 1100 | ssize_t rc = 0;
|
| 1101 |
|
| 1102 | if (is_namespace_pmem(dev)) {
|
| 1103 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 1104 |
|
| 1105 | lbasize = &nspm->lbasize;
|
| 1106 | supported = pmem_lbasize_supported;
|
| 1107 | } else
|
| 1108 | return -ENXIO;
|
| 1109 |
|
| 1110 | guard(device)(dev);
|
| 1111 | guard(nvdimm_bus)(dev);
|
| 1112 | if (to_ndns(dev)->claim) {
|
| 1113 | dev_dbg(dev, "namespace %s already claimed\n", dev_name(dev));
|
| 1114 | return -EBUSY;
|
| 1115 | }
|
| 1116 |
|
| 1117 | rc = nd_size_select_store(dev, buf, lbasize, supported);
|
| 1118 | if (rc < 0) {
|
| 1119 | dev_dbg(dev, "size select fail: %zd tried: %s%s", rc,
|
| 1120 | buf, buf[len - 1] == '\n' ? "" : "\n");
|
| 1121 | return rc;
|
| 1122 | }
|
| 1123 |
|
| 1124 | rc = nd_namespace_label_update(nd_region, dev);
|
| 1125 | if (rc < 0) {
|
| 1126 | dev_dbg(dev, "label update fail: %zd tried: %s%s",
|
| 1127 | rc, buf, buf[len - 1] == '\n' ? "" : "\n");
|
| 1128 | return rc;
|
| 1129 | }
|
| 1130 |
|
| 1131 | dev_dbg(dev, "wrote: %s%s", buf, buf[len - 1] == '\n' ? "" : "\n");
|
| 1132 |
|
| 1133 | return len;
|
| 1134 | }
|
| 1135 | static DEVICE_ATTR_RW(sector_size);
|
| 1136 |
|
| 1137 | static ssize_t dpa_extents_show(struct device *dev,
|
| 1138 | struct device_attribute *attr, char *buf)
|
| 1139 | {
|
| 1140 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 1141 | struct nd_label_id label_id;
|
| 1142 | uuid_t *uuid = NULL;
|
| 1143 | int count = 0, i;
|
| 1144 | u32 flags = 0;
|
| 1145 |
|
| 1146 | guard(nvdimm_bus)(dev);
|
| 1147 | if (is_namespace_pmem(dev)) {
|
| 1148 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
| 1149 |
|
| 1150 | uuid = nspm->uuid;
|
| 1151 | flags = 0;
|
| 1152 | }
|
| 1153 |
|
| 1154 | if (!uuid)
|
| 1155 | return sprintf(buf, "%d\n", count);
|
| 1156 |
|
| 1157 | nd_label_gen_id(&label_id, uuid, flags);
|
| 1158 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1159 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 1160 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1161 | struct resource *res;
|
| 1162 |
|
| 1163 | for_each_dpa_resource(ndd, res)
|
| 1164 | if (strcmp(res->name, label_id.id) == 0)
|
| 1165 | count++;
|
| 1166 | }
|
| 1167 |
|
| 1168 | return sprintf(buf, "%d\n", count);
|
| 1169 | }
|
| 1170 | static DEVICE_ATTR_RO(dpa_extents);
|
| 1171 |
|
| 1172 | static int btt_claim_class(struct device *dev)
|
| 1173 | {
|
| 1174 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 1175 | int i, loop_bitmask = 0;
|
| 1176 |
|
| 1177 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1178 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 1179 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1180 | struct nd_namespace_index *nsindex;
|
| 1181 |
|
| 1182 | |
| 1183 | * If any of the DIMMs do not support labels the only
|
| 1184 | * possible BTT format is v1.
|
| 1185 |
|
| 1186 | if (!ndd) {
|
| 1187 | loop_bitmask = 0;
|
| 1188 | break;
|
| 1189 | }
|
| 1190 |
|
| 1191 | nsindex = to_namespace_index(ndd, ndd->ns_current);
|
| 1192 | if (nsindex == NULL)
|
| 1193 | loop_bitmask |= 1;
|
| 1194 | else {
|
| 1195 |
|
| 1196 | if (__le16_to_cpu(nsindex->major) == 1
|
| 1197 | && __le16_to_cpu(nsindex->minor) == 1)
|
| 1198 | loop_bitmask |= 2;
|
| 1199 | else
|
| 1200 | loop_bitmask |= 4;
|
| 1201 | }
|
| 1202 | }
|
| 1203 | |
| 1204 | * If nsindex is null loop_bitmask's bit 0 will be set, and if an index
|
| 1205 | * block is found, a v1.1 label for any mapping will set bit 1, and a
|
| 1206 | * v1.2 label will set bit 2.
|
| 1207 | *
|
| 1208 | * At the end of the loop, at most one of the three bits must be set.
|
| 1209 | * If multiple bits were set, it means the different mappings disagree
|
| 1210 | * about their labels, and this must be cleaned up first.
|
| 1211 | *
|
| 1212 | * If all the label index blocks are found to agree, nsindex of NULL
|
| 1213 | * implies labels haven't been initialized yet, and when they will,
|
| 1214 | * they will be of the 1.2 format, so we can assume BTT2.0
|
| 1215 | *
|
| 1216 | * If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are
|
| 1217 | * found, we enforce BTT2.0
|
| 1218 | *
|
| 1219 | * If the loop was never entered, default to BTT1.1 (legacy namespaces)
|
| 1220 |
|
| 1221 | switch (loop_bitmask) {
|
| 1222 | case 0:
|
| 1223 | case 2:
|
| 1224 | return NVDIMM_CCLASS_BTT;
|
| 1225 | case 1:
|
| 1226 | case 4:
|
| 1227 | return NVDIMM_CCLASS_BTT2;
|
| 1228 | default:
|
| 1229 | return -ENXIO;
|
| 1230 | }
|
| 1231 | }
|
| 1232 |
|
| 1233 | static ssize_t holder_show(struct device *dev,
|
| 1234 | struct device_attribute *attr, char *buf)
|
| 1235 | {
|
| 1236 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 1237 | ssize_t rc;
|
| 1238 |
|
| 1239 | device_lock(dev);
|
| 1240 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : "");
|
| 1241 | device_unlock(dev);
|
| 1242 |
|
| 1243 | return rc;
|
| 1244 | }
|
| 1245 | static DEVICE_ATTR_RO(holder);
|
| 1246 |
|
| 1247 | static int __holder_class_store(struct device *dev, const char *buf)
|
| 1248 | {
|
| 1249 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 1250 |
|
| 1251 | if (dev->driver || ndns->claim)
|
| 1252 | return -EBUSY;
|
| 1253 |
|
| 1254 | if (sysfs_streq(buf, "btt")) {
|
| 1255 | int rc = btt_claim_class(dev);
|
| 1256 |
|
| 1257 | if (rc < NVDIMM_CCLASS_NONE)
|
| 1258 | return rc;
|
| 1259 | ndns->claim_class = rc;
|
| 1260 | } else if (sysfs_streq(buf, "pfn"))
|
| 1261 | ndns->claim_class = NVDIMM_CCLASS_PFN;
|
| 1262 | else if (sysfs_streq(buf, "dax"))
|
| 1263 | ndns->claim_class = NVDIMM_CCLASS_DAX;
|
| 1264 | else if (sysfs_streq(buf, ""))
|
| 1265 | ndns->claim_class = NVDIMM_CCLASS_NONE;
|
| 1266 | else
|
| 1267 | return -EINVAL;
|
| 1268 |
|
| 1269 | return 0;
|
| 1270 | }
|
| 1271 |
|
| 1272 | static ssize_t holder_class_store(struct device *dev,
|
| 1273 | struct device_attribute *attr, const char *buf, size_t len)
|
| 1274 | {
|
| 1275 | struct nd_region *nd_region = to_nd_region(dev->parent);
|
| 1276 | int rc;
|
| 1277 |
|
| 1278 | guard(device)(dev);
|
| 1279 | guard(nvdimm_bus)(dev);
|
| 1280 | wait_nvdimm_bus_probe_idle(dev);
|
| 1281 | rc = __holder_class_store(dev, buf);
|
| 1282 | if (rc >= 0)
|
| 1283 | rc = nd_namespace_label_update(nd_region, dev);
|
| 1284 | dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc);
|
| 1285 |
|
| 1286 | return rc < 0 ? rc : len;
|
| 1287 | }
|
| 1288 |
|
| 1289 | static ssize_t holder_class_show(struct device *dev,
|
| 1290 | struct device_attribute *attr, char *buf)
|
| 1291 | {
|
| 1292 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 1293 | ssize_t rc;
|
| 1294 |
|
| 1295 | device_lock(dev);
|
| 1296 | if (ndns->claim_class == NVDIMM_CCLASS_NONE)
|
| 1297 | rc = sprintf(buf, "\n");
|
| 1298 | else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) ||
|
| 1299 | (ndns->claim_class == NVDIMM_CCLASS_BTT2))
|
| 1300 | rc = sprintf(buf, "btt\n");
|
| 1301 | else if (ndns->claim_class == NVDIMM_CCLASS_PFN)
|
| 1302 | rc = sprintf(buf, "pfn\n");
|
| 1303 | else if (ndns->claim_class == NVDIMM_CCLASS_DAX)
|
| 1304 | rc = sprintf(buf, "dax\n");
|
| 1305 | else
|
| 1306 | rc = sprintf(buf, "<unknown>\n");
|
| 1307 | device_unlock(dev);
|
| 1308 |
|
| 1309 | return rc;
|
| 1310 | }
|
| 1311 | static DEVICE_ATTR_RW(holder_class);
|
| 1312 |
|
| 1313 | static ssize_t mode_show(struct device *dev,
|
| 1314 | struct device_attribute *attr, char *buf)
|
| 1315 | {
|
| 1316 | struct nd_namespace_common *ndns = to_ndns(dev);
|
| 1317 | struct device *claim;
|
| 1318 | char *mode;
|
| 1319 | ssize_t rc;
|
| 1320 |
|
| 1321 | device_lock(dev);
|
| 1322 | claim = ndns->claim;
|
| 1323 | if (claim && is_nd_btt(claim))
|
| 1324 | mode = "safe";
|
| 1325 | else if (claim && is_nd_pfn(claim))
|
| 1326 | mode = "memory";
|
| 1327 | else if (claim && is_nd_dax(claim))
|
| 1328 | mode = "dax";
|
| 1329 | else if (!claim && pmem_should_map_pages(dev))
|
| 1330 | mode = "memory";
|
| 1331 | else
|
| 1332 | mode = "raw";
|
| 1333 | rc = sprintf(buf, "%s\n", mode);
|
| 1334 | device_unlock(dev);
|
| 1335 |
|
| 1336 | return rc;
|
| 1337 | }
|
| 1338 | static DEVICE_ATTR_RO(mode);
|
| 1339 |
|
| 1340 | static ssize_t force_raw_store(struct device *dev,
|
| 1341 | struct device_attribute *attr, const char *buf, size_t len)
|
| 1342 | {
|
| 1343 | bool force_raw;
|
| 1344 | int rc = kstrtobool(buf, &force_raw);
|
| 1345 |
|
| 1346 | if (rc)
|
| 1347 | return rc;
|
| 1348 |
|
| 1349 | to_ndns(dev)->force_raw = force_raw;
|
| 1350 | return len;
|
| 1351 | }
|
| 1352 |
|
| 1353 | static ssize_t force_raw_show(struct device *dev,
|
| 1354 | struct device_attribute *attr, char *buf)
|
| 1355 | {
|
| 1356 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw);
|
| 1357 | }
|
| 1358 | static DEVICE_ATTR_RW(force_raw);
|
| 1359 |
|
| 1360 | static struct attribute *nd_namespace_attributes[] = {
|
| 1361 | &dev_attr_nstype.attr,
|
| 1362 | &dev_attr_size.attr,
|
| 1363 | &dev_attr_mode.attr,
|
| 1364 | &dev_attr_uuid.attr,
|
| 1365 | &dev_attr_holder.attr,
|
| 1366 | &dev_attr_resource.attr,
|
| 1367 | &dev_attr_alt_name.attr,
|
| 1368 | &dev_attr_force_raw.attr,
|
| 1369 | &dev_attr_sector_size.attr,
|
| 1370 | &dev_attr_dpa_extents.attr,
|
| 1371 | &dev_attr_holder_class.attr,
|
| 1372 | NULL,
|
| 1373 | };
|
| 1374 |
|
| 1375 | static umode_t namespace_visible(struct kobject *kobj,
|
| 1376 | struct attribute *a, int n)
|
| 1377 | {
|
| 1378 | struct device *dev = container_of(kobj, struct device, kobj);
|
| 1379 |
|
| 1380 | if (is_namespace_pmem(dev)) {
|
| 1381 | if (a == &dev_attr_size.attr)
|
| 1382 | return 0644;
|
| 1383 |
|
| 1384 | return a->mode;
|
| 1385 | }
|
| 1386 |
|
| 1387 |
|
| 1388 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr ||
|
| 1389 | a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr ||
|
| 1390 | a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr ||
|
| 1391 | a == &dev_attr_resource.attr)
|
| 1392 | return a->mode;
|
| 1393 |
|
| 1394 | return 0;
|
| 1395 | }
|
| 1396 |
|
| 1397 | static struct attribute_group nd_namespace_attribute_group = {
|
| 1398 | .attrs = nd_namespace_attributes,
|
| 1399 | .is_visible = namespace_visible,
|
| 1400 | };
|
| 1401 |
|
| 1402 | static const struct attribute_group *nd_namespace_attribute_groups[] = {
|
| 1403 | &nd_device_attribute_group,
|
| 1404 | &nd_namespace_attribute_group,
|
| 1405 | &nd_numa_attribute_group,
|
| 1406 | NULL,
|
| 1407 | };
|
| 1408 |
|
| 1409 | static const struct device_type namespace_io_device_type = {
|
| 1410 | .name = "nd_namespace_io",
|
| 1411 | .release = namespace_io_release,
|
| 1412 | .groups = nd_namespace_attribute_groups,
|
| 1413 | };
|
| 1414 |
|
| 1415 | static const struct device_type namespace_pmem_device_type = {
|
| 1416 | .name = "nd_namespace_pmem",
|
| 1417 | .release = namespace_pmem_release,
|
| 1418 | .groups = nd_namespace_attribute_groups,
|
| 1419 | };
|
| 1420 |
|
| 1421 | static bool is_namespace_pmem(const struct device *dev)
|
| 1422 | {
|
| 1423 | return dev ? dev->type == &namespace_pmem_device_type : false;
|
| 1424 | }
|
| 1425 |
|
| 1426 | static bool is_namespace_io(const struct device *dev)
|
| 1427 | {
|
| 1428 | return dev ? dev->type == &namespace_io_device_type : false;
|
| 1429 | }
|
| 1430 |
|
| 1431 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
|
| 1432 | {
|
| 1433 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
|
| 1434 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
|
| 1435 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL;
|
| 1436 | struct nd_namespace_common *ndns = NULL;
|
| 1437 | resource_size_t size;
|
| 1438 |
|
| 1439 | if (nd_btt || nd_pfn || nd_dax) {
|
| 1440 | if (nd_btt)
|
| 1441 | ndns = nd_btt->ndns;
|
| 1442 | else if (nd_pfn)
|
| 1443 | ndns = nd_pfn->ndns;
|
| 1444 | else if (nd_dax)
|
| 1445 | ndns = nd_dax->nd_pfn.ndns;
|
| 1446 |
|
| 1447 | if (!ndns)
|
| 1448 | return ERR_PTR(-ENODEV);
|
| 1449 |
|
| 1450 | |
| 1451 | * Flush any in-progess probes / removals in the driver
|
| 1452 | * for the raw personality of this namespace.
|
| 1453 |
|
| 1454 | device_lock(&ndns->dev);
|
| 1455 | device_unlock(&ndns->dev);
|
| 1456 | if (ndns->dev.driver) {
|
| 1457 | dev_dbg(&ndns->dev, "is active, can't bind %s\n",
|
| 1458 | dev_name(dev));
|
| 1459 | return ERR_PTR(-EBUSY);
|
| 1460 | }
|
| 1461 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev,
|
| 1462 | "host (%s) vs claim (%s) mismatch\n",
|
| 1463 | dev_name(dev),
|
| 1464 | dev_name(ndns->claim)))
|
| 1465 | return ERR_PTR(-ENXIO);
|
| 1466 | } else {
|
| 1467 | ndns = to_ndns(dev);
|
| 1468 | if (ndns->claim) {
|
| 1469 | dev_dbg(dev, "claimed by %s, failing probe\n",
|
| 1470 | dev_name(ndns->claim));
|
| 1471 |
|
| 1472 | return ERR_PTR(-ENXIO);
|
| 1473 | }
|
| 1474 | }
|
| 1475 |
|
| 1476 | if (nvdimm_namespace_locked(ndns))
|
| 1477 | return ERR_PTR(-EACCES);
|
| 1478 |
|
| 1479 | size = nvdimm_namespace_capacity(ndns);
|
| 1480 | if (size < ND_MIN_NAMESPACE_SIZE) {
|
| 1481 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n",
|
| 1482 | &size, ND_MIN_NAMESPACE_SIZE);
|
| 1483 | return ERR_PTR(-ENODEV);
|
| 1484 | }
|
| 1485 |
|
| 1486 | |
| 1487 | * Note, alignment validation for fsdax and devdax mode
|
| 1488 | * namespaces happens in nd_pfn_validate() where infoblock
|
| 1489 | * padding parameters can be applied.
|
| 1490 |
|
| 1491 | if (pmem_should_map_pages(dev)) {
|
| 1492 | struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
|
| 1493 | struct resource *res = &nsio->res;
|
| 1494 |
|
| 1495 | if (!IS_ALIGNED(res->start | (res->end + 1),
|
| 1496 | memremap_compat_align())) {
|
| 1497 | dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res);
|
| 1498 | return ERR_PTR(-EOPNOTSUPP);
|
| 1499 | }
|
| 1500 | }
|
| 1501 |
|
| 1502 | if (is_namespace_pmem(&ndns->dev)) {
|
| 1503 | struct nd_namespace_pmem *nspm;
|
| 1504 |
|
| 1505 | nspm = to_nd_namespace_pmem(&ndns->dev);
|
| 1506 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__))
|
| 1507 | return ERR_PTR(-ENODEV);
|
| 1508 | }
|
| 1509 |
|
| 1510 | return ndns;
|
| 1511 | }
|
| 1512 | EXPORT_SYMBOL(nvdimm_namespace_common_probe);
|
| 1513 |
|
| 1514 | int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
|
| 1515 | resource_size_t size)
|
| 1516 | {
|
| 1517 | return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size);
|
| 1518 | }
|
| 1519 | EXPORT_SYMBOL_GPL(devm_namespace_enable);
|
| 1520 |
|
| 1521 | void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns)
|
| 1522 | {
|
| 1523 | devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev));
|
| 1524 | }
|
| 1525 | EXPORT_SYMBOL_GPL(devm_namespace_disable);
|
| 1526 |
|
| 1527 | static struct device **create_namespace_io(struct nd_region *nd_region)
|
| 1528 | {
|
| 1529 | struct nd_namespace_io *nsio;
|
| 1530 | struct device *dev, **devs;
|
| 1531 | struct resource *res;
|
| 1532 |
|
| 1533 | nsio = kzalloc_obj(*nsio);
|
| 1534 | if (!nsio)
|
| 1535 | return NULL;
|
| 1536 |
|
| 1537 | devs = kzalloc_objs(struct device *, 2);
|
| 1538 | if (!devs) {
|
| 1539 | kfree(nsio);
|
| 1540 | return NULL;
|
| 1541 | }
|
| 1542 |
|
| 1543 | dev = &nsio->common.dev;
|
| 1544 | dev->type = &namespace_io_device_type;
|
| 1545 | dev->parent = &nd_region->dev;
|
| 1546 | res = &nsio->res;
|
| 1547 | res->name = dev_name(&nd_region->dev);
|
| 1548 | res->flags = IORESOURCE_MEM;
|
| 1549 | res->start = nd_region->ndr_start;
|
| 1550 | res->end = res->start + nd_region->ndr_size - 1;
|
| 1551 |
|
| 1552 | devs[0] = dev;
|
| 1553 | return devs;
|
| 1554 | }
|
| 1555 |
|
| 1556 | static bool has_uuid_at_pos(struct nd_region *nd_region, const uuid_t *uuid,
|
| 1557 | u64 cookie, u16 pos)
|
| 1558 | {
|
| 1559 | struct nd_namespace_label *found = NULL;
|
| 1560 | int i;
|
| 1561 |
|
| 1562 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1563 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 1564 | struct nd_interleave_set *nd_set = nd_region->nd_set;
|
| 1565 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1566 | struct nd_label_ent *label_ent;
|
| 1567 | bool found_uuid = false;
|
| 1568 |
|
| 1569 | list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
| 1570 | struct nd_namespace_label *nd_label = label_ent->label;
|
| 1571 | u16 position;
|
| 1572 |
|
| 1573 | if (!nd_label)
|
| 1574 | continue;
|
| 1575 | position = nsl_get_position(ndd, nd_label);
|
| 1576 |
|
| 1577 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie))
|
| 1578 | continue;
|
| 1579 |
|
| 1580 | if (!nsl_uuid_equal(ndd, nd_label, uuid))
|
| 1581 | continue;
|
| 1582 |
|
| 1583 | if (!nsl_validate_type_guid(ndd, nd_label,
|
| 1584 | &nd_set->type_guid))
|
| 1585 | continue;
|
| 1586 |
|
| 1587 | if (found_uuid) {
|
| 1588 | dev_dbg(ndd->dev, "duplicate entry for uuid\n");
|
| 1589 | return false;
|
| 1590 | }
|
| 1591 | found_uuid = true;
|
| 1592 | if (!nsl_validate_nlabel(nd_region, ndd, nd_label))
|
| 1593 | continue;
|
| 1594 | if (position != pos)
|
| 1595 | continue;
|
| 1596 | found = nd_label;
|
| 1597 | break;
|
| 1598 | }
|
| 1599 | if (found)
|
| 1600 | break;
|
| 1601 | }
|
| 1602 | return found != NULL;
|
| 1603 | }
|
| 1604 |
|
| 1605 | static int select_pmem_id(struct nd_region *nd_region, const uuid_t *pmem_id)
|
| 1606 | {
|
| 1607 | int i;
|
| 1608 |
|
| 1609 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1610 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 1611 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1612 | struct nd_namespace_label *nd_label = NULL;
|
| 1613 | u64 hw_start, hw_end, pmem_start, pmem_end;
|
| 1614 | struct nd_label_ent *label_ent;
|
| 1615 |
|
| 1616 | lockdep_assert_held(&nd_mapping->lock);
|
| 1617 | list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
| 1618 | nd_label = label_ent->label;
|
| 1619 | if (!nd_label)
|
| 1620 | continue;
|
| 1621 | if (nsl_uuid_equal(ndd, nd_label, pmem_id))
|
| 1622 | break;
|
| 1623 | nd_label = NULL;
|
| 1624 | }
|
| 1625 |
|
| 1626 | if (!nd_label) {
|
| 1627 | WARN_ON(1);
|
| 1628 | return -EINVAL;
|
| 1629 | }
|
| 1630 |
|
| 1631 | |
| 1632 | * Check that this label is compliant with the dpa
|
| 1633 | * range published in NFIT
|
| 1634 |
|
| 1635 | hw_start = nd_mapping->start;
|
| 1636 | hw_end = hw_start + nd_mapping->size;
|
| 1637 | pmem_start = nsl_get_dpa(ndd, nd_label);
|
| 1638 | pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label);
|
| 1639 | if (pmem_start >= hw_start && pmem_start < hw_end
|
| 1640 | && pmem_end <= hw_end && pmem_end > hw_start)
|
| 1641 | ;
|
| 1642 | else {
|
| 1643 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n",
|
| 1644 | dev_name(ndd->dev),
|
| 1645 | nsl_uuid_raw(ndd, nd_label));
|
| 1646 | return -EINVAL;
|
| 1647 | }
|
| 1648 |
|
| 1649 |
|
| 1650 | list_move(&label_ent->list, &nd_mapping->labels);
|
| 1651 | }
|
| 1652 | return 0;
|
| 1653 | }
|
| 1654 |
|
| 1655 | |
| 1656 | * create_namespace_pmem - validate interleave set labelling, retrieve label0
|
| 1657 | * @nd_region: region with mappings to validate
|
| 1658 | * @nd_mapping: container of dpa-resource-root + labels
|
| 1659 | * @nd_label: target pmem namespace label to evaluate
|
| 1660 | *
|
| 1661 | * Returns: the created &struct device on success or ERR_PTR(-errno) on error
|
| 1662 |
|
| 1663 | static struct device *create_namespace_pmem(struct nd_region *nd_region,
|
| 1664 | struct nd_mapping *nd_mapping,
|
| 1665 | struct nd_namespace_label *nd_label)
|
| 1666 | {
|
| 1667 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1668 | struct nd_namespace_index *nsindex =
|
| 1669 | to_namespace_index(ndd, ndd->ns_current);
|
| 1670 | u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex);
|
| 1671 | u64 altcookie = nd_region_interleave_set_altcookie(nd_region);
|
| 1672 | struct nd_label_ent *label_ent;
|
| 1673 | struct nd_namespace_pmem *nspm;
|
| 1674 | resource_size_t size = 0;
|
| 1675 | struct resource *res;
|
| 1676 | struct device *dev;
|
| 1677 | uuid_t uuid;
|
| 1678 | int rc = 0;
|
| 1679 | u16 i;
|
| 1680 |
|
| 1681 | if (cookie == 0) {
|
| 1682 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
|
| 1683 | return ERR_PTR(-ENXIO);
|
| 1684 | }
|
| 1685 |
|
| 1686 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) {
|
| 1687 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
|
| 1688 | nsl_uuid_raw(ndd, nd_label));
|
| 1689 | if (!nsl_validate_isetcookie(ndd, nd_label, altcookie))
|
| 1690 | return ERR_PTR(-EAGAIN);
|
| 1691 |
|
| 1692 | dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n",
|
| 1693 | nsl_uuid_raw(ndd, nd_label));
|
| 1694 | }
|
| 1695 |
|
| 1696 | nspm = kzalloc_obj(*nspm);
|
| 1697 | if (!nspm)
|
| 1698 | return ERR_PTR(-ENOMEM);
|
| 1699 |
|
| 1700 | nspm->id = -1;
|
| 1701 | dev = &nspm->nsio.common.dev;
|
| 1702 | dev->type = &namespace_pmem_device_type;
|
| 1703 | dev->parent = &nd_region->dev;
|
| 1704 | res = &nspm->nsio.res;
|
| 1705 | res->name = dev_name(&nd_region->dev);
|
| 1706 | res->flags = IORESOURCE_MEM;
|
| 1707 |
|
| 1708 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1709 | nsl_get_uuid(ndd, nd_label, &uuid);
|
| 1710 | if (has_uuid_at_pos(nd_region, &uuid, cookie, i))
|
| 1711 | continue;
|
| 1712 | if (has_uuid_at_pos(nd_region, &uuid, altcookie, i))
|
| 1713 | continue;
|
| 1714 | break;
|
| 1715 | }
|
| 1716 |
|
| 1717 | if (i < nd_region->ndr_mappings) {
|
| 1718 | struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm;
|
| 1719 |
|
| 1720 | |
| 1721 | * Give up if we don't find an instance of a uuid at each
|
| 1722 | * position (from 0 to nd_region->ndr_mappings - 1), or if we
|
| 1723 | * find a dimm with two instances of the same uuid.
|
| 1724 |
|
| 1725 | dev_err(&nd_region->dev, "%s missing label for %pUb\n",
|
| 1726 | nvdimm_name(nvdimm), nsl_uuid_raw(ndd, nd_label));
|
| 1727 | rc = -EINVAL;
|
| 1728 | goto err;
|
| 1729 | }
|
| 1730 |
|
| 1731 | |
| 1732 | * Fix up each mapping's 'labels' to have the validated pmem label for
|
| 1733 | * that position at labels[0], and NULL at labels[1]. In the process,
|
| 1734 | * check that the namespace aligns with interleave-set.
|
| 1735 |
|
| 1736 | nsl_get_uuid(ndd, nd_label, &uuid);
|
| 1737 | rc = select_pmem_id(nd_region, &uuid);
|
| 1738 | if (rc)
|
| 1739 | goto err;
|
| 1740 |
|
| 1741 |
|
| 1742 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1743 | struct nd_namespace_label *label0;
|
| 1744 | struct nvdimm_drvdata *ndd;
|
| 1745 |
|
| 1746 | nd_mapping = &nd_region->mapping[i];
|
| 1747 | label_ent = list_first_entry_or_null(&nd_mapping->labels,
|
| 1748 | typeof(*label_ent), list);
|
| 1749 | label0 = label_ent ? label_ent->label : NULL;
|
| 1750 |
|
| 1751 | if (!label0) {
|
| 1752 | WARN_ON(1);
|
| 1753 | continue;
|
| 1754 | }
|
| 1755 |
|
| 1756 | ndd = to_ndd(nd_mapping);
|
| 1757 | size += nsl_get_rawsize(ndd, label0);
|
| 1758 | if (nsl_get_position(ndd, label0) != 0)
|
| 1759 | continue;
|
| 1760 | WARN_ON(nspm->alt_name || nspm->uuid);
|
| 1761 | nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0),
|
| 1762 | NSLABEL_NAME_LEN, GFP_KERNEL);
|
| 1763 | nsl_get_uuid(ndd, label0, &uuid);
|
| 1764 | nspm->uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL);
|
| 1765 | nspm->lbasize = nsl_get_lbasize(ndd, label0);
|
| 1766 | nspm->nsio.common.claim_class =
|
| 1767 | nsl_get_claim_class(ndd, label0);
|
| 1768 | }
|
| 1769 |
|
| 1770 | if (!nspm->alt_name || !nspm->uuid) {
|
| 1771 | rc = -ENOMEM;
|
| 1772 | goto err;
|
| 1773 | }
|
| 1774 |
|
| 1775 | nd_namespace_pmem_set_resource(nd_region, nspm, size);
|
| 1776 |
|
| 1777 | return dev;
|
| 1778 | err:
|
| 1779 | namespace_pmem_release(dev);
|
| 1780 | switch (rc) {
|
| 1781 | case -EINVAL:
|
| 1782 | dev_dbg(&nd_region->dev, "invalid label(s)\n");
|
| 1783 | break;
|
| 1784 | default:
|
| 1785 | dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc);
|
| 1786 | break;
|
| 1787 | }
|
| 1788 | return ERR_PTR(rc);
|
| 1789 | }
|
| 1790 |
|
| 1791 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
|
| 1792 | {
|
| 1793 | struct nd_namespace_pmem *nspm;
|
| 1794 | struct resource *res;
|
| 1795 | struct device *dev;
|
| 1796 |
|
| 1797 | if (!is_memory(&nd_region->dev))
|
| 1798 | return NULL;
|
| 1799 |
|
| 1800 | nspm = kzalloc_obj(*nspm);
|
| 1801 | if (!nspm)
|
| 1802 | return NULL;
|
| 1803 |
|
| 1804 | dev = &nspm->nsio.common.dev;
|
| 1805 | dev->type = &namespace_pmem_device_type;
|
| 1806 | dev->parent = &nd_region->dev;
|
| 1807 | res = &nspm->nsio.res;
|
| 1808 | res->name = dev_name(&nd_region->dev);
|
| 1809 | res->flags = IORESOURCE_MEM;
|
| 1810 |
|
| 1811 | nspm->id = ida_alloc(&nd_region->ns_ida, GFP_KERNEL);
|
| 1812 | if (nspm->id < 0) {
|
| 1813 | kfree(nspm);
|
| 1814 | return NULL;
|
| 1815 | }
|
| 1816 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id);
|
| 1817 | nd_namespace_pmem_set_resource(nd_region, nspm, 0);
|
| 1818 |
|
| 1819 | return dev;
|
| 1820 | }
|
| 1821 |
|
| 1822 | static struct lock_class_key nvdimm_namespace_key;
|
| 1823 |
|
| 1824 | void nd_region_create_ns_seed(struct nd_region *nd_region)
|
| 1825 | {
|
| 1826 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
| 1827 |
|
| 1828 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO)
|
| 1829 | return;
|
| 1830 |
|
| 1831 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
|
| 1832 |
|
| 1833 | |
| 1834 | * Seed creation failures are not fatal, provisioning is simply
|
| 1835 | * disabled until memory becomes available
|
| 1836 |
|
| 1837 | if (!nd_region->ns_seed)
|
| 1838 | dev_err(&nd_region->dev, "failed to create namespace\n");
|
| 1839 | else {
|
| 1840 | device_initialize(nd_region->ns_seed);
|
| 1841 | lockdep_set_class(&nd_region->ns_seed->mutex,
|
| 1842 | &nvdimm_namespace_key);
|
| 1843 | nd_device_register(nd_region->ns_seed);
|
| 1844 | }
|
| 1845 | }
|
| 1846 |
|
| 1847 | void nd_region_create_dax_seed(struct nd_region *nd_region)
|
| 1848 | {
|
| 1849 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
| 1850 | nd_region->dax_seed = nd_dax_create(nd_region);
|
| 1851 | |
| 1852 | * Seed creation failures are not fatal, provisioning is simply
|
| 1853 | * disabled until memory becomes available
|
| 1854 |
|
| 1855 | if (!nd_region->dax_seed)
|
| 1856 | dev_err(&nd_region->dev, "failed to create dax namespace\n");
|
| 1857 | }
|
| 1858 |
|
| 1859 | void nd_region_create_pfn_seed(struct nd_region *nd_region)
|
| 1860 | {
|
| 1861 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
| 1862 | nd_region->pfn_seed = nd_pfn_create(nd_region);
|
| 1863 | |
| 1864 | * Seed creation failures are not fatal, provisioning is simply
|
| 1865 | * disabled until memory becomes available
|
| 1866 |
|
| 1867 | if (!nd_region->pfn_seed)
|
| 1868 | dev_err(&nd_region->dev, "failed to create pfn namespace\n");
|
| 1869 | }
|
| 1870 |
|
| 1871 | void nd_region_create_btt_seed(struct nd_region *nd_region)
|
| 1872 | {
|
| 1873 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
| 1874 | nd_region->btt_seed = nd_btt_create(nd_region);
|
| 1875 | |
| 1876 | * Seed creation failures are not fatal, provisioning is simply
|
| 1877 | * disabled until memory becomes available
|
| 1878 |
|
| 1879 | if (!nd_region->btt_seed)
|
| 1880 | dev_err(&nd_region->dev, "failed to create btt namespace\n");
|
| 1881 | }
|
| 1882 |
|
| 1883 | static int add_namespace_resource(struct nd_region *nd_region,
|
| 1884 | struct nd_namespace_label *nd_label, struct device **devs,
|
| 1885 | int count)
|
| 1886 | {
|
| 1887 | struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
| 1888 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1889 | int i;
|
| 1890 |
|
| 1891 | for (i = 0; i < count; i++) {
|
| 1892 | uuid_t *uuid = namespace_to_uuid(devs[i]);
|
| 1893 |
|
| 1894 | if (IS_ERR(uuid)) {
|
| 1895 | WARN_ON(1);
|
| 1896 | continue;
|
| 1897 | }
|
| 1898 |
|
| 1899 | if (!nsl_uuid_equal(ndd, nd_label, uuid))
|
| 1900 | continue;
|
| 1901 | dev_err(&nd_region->dev,
|
| 1902 | "error: conflicting extents for uuid: %pUb\n", uuid);
|
| 1903 | return -ENXIO;
|
| 1904 | }
|
| 1905 |
|
| 1906 | return i;
|
| 1907 | }
|
| 1908 |
|
| 1909 | static int cmp_dpa(const void *a, const void *b)
|
| 1910 | {
|
| 1911 | const struct device *dev_a = *(const struct device **) a;
|
| 1912 | const struct device *dev_b = *(const struct device **) b;
|
| 1913 | struct nd_namespace_pmem *nspm_a, *nspm_b;
|
| 1914 |
|
| 1915 | if (is_namespace_io(dev_a))
|
| 1916 | return 0;
|
| 1917 |
|
| 1918 | nspm_a = to_nd_namespace_pmem(dev_a);
|
| 1919 | nspm_b = to_nd_namespace_pmem(dev_b);
|
| 1920 |
|
| 1921 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start,
|
| 1922 | sizeof(resource_size_t));
|
| 1923 | }
|
| 1924 |
|
| 1925 | static struct device **scan_labels(struct nd_region *nd_region)
|
| 1926 | {
|
| 1927 | int i, count = 0;
|
| 1928 | struct device *dev, **devs;
|
| 1929 | struct nd_label_ent *label_ent, *e;
|
| 1930 | struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
| 1931 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 1932 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1;
|
| 1933 |
|
| 1934 | devs = kzalloc_objs(dev, 2);
|
| 1935 | if (!devs)
|
| 1936 | return NULL;
|
| 1937 |
|
| 1938 |
|
| 1939 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
|
| 1940 | struct nd_namespace_label *nd_label = label_ent->label;
|
| 1941 | struct device **__devs;
|
| 1942 |
|
| 1943 | if (!nd_label)
|
| 1944 | continue;
|
| 1945 |
|
| 1946 |
|
| 1947 | if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start ||
|
| 1948 | nsl_get_dpa(ndd, nd_label) > map_end)
|
| 1949 | continue;
|
| 1950 |
|
| 1951 | i = add_namespace_resource(nd_region, nd_label, devs, count);
|
| 1952 | if (i < 0)
|
| 1953 | goto err;
|
| 1954 | if (i < count)
|
| 1955 | continue;
|
| 1956 | if (count) {
|
| 1957 | __devs = kzalloc_objs(dev, count + 2);
|
| 1958 | if (!__devs)
|
| 1959 | goto err;
|
| 1960 | memcpy(__devs, devs, sizeof(dev) * count);
|
| 1961 | kfree(devs);
|
| 1962 | devs = __devs;
|
| 1963 | }
|
| 1964 |
|
| 1965 | dev = create_namespace_pmem(nd_region, nd_mapping, nd_label);
|
| 1966 | if (IS_ERR(dev)) {
|
| 1967 | switch (PTR_ERR(dev)) {
|
| 1968 | case -EAGAIN:
|
| 1969 |
|
| 1970 | continue;
|
| 1971 | default:
|
| 1972 | goto err;
|
| 1973 | }
|
| 1974 | } else
|
| 1975 | devs[count++] = dev;
|
| 1976 |
|
| 1977 | }
|
| 1978 |
|
| 1979 | dev_dbg(&nd_region->dev, "discovered %d namespace%s\n", count,
|
| 1980 | str_plural(count));
|
| 1981 |
|
| 1982 | if (count == 0) {
|
| 1983 | struct nd_namespace_pmem *nspm;
|
| 1984 |
|
| 1985 |
|
| 1986 | nd_mapping_free_labels(nd_mapping);
|
| 1987 | nspm = kzalloc_obj(*nspm);
|
| 1988 | if (!nspm)
|
| 1989 | goto err;
|
| 1990 | dev = &nspm->nsio.common.dev;
|
| 1991 | dev->type = &namespace_pmem_device_type;
|
| 1992 | nd_namespace_pmem_set_resource(nd_region, nspm, 0);
|
| 1993 | dev->parent = &nd_region->dev;
|
| 1994 | devs[count++] = dev;
|
| 1995 | } else if (is_memory(&nd_region->dev)) {
|
| 1996 |
|
| 1997 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 1998 | struct list_head *l, *e;
|
| 1999 | LIST_HEAD(list);
|
| 2000 | int j;
|
| 2001 |
|
| 2002 | nd_mapping = &nd_region->mapping[i];
|
| 2003 | if (list_empty(&nd_mapping->labels)) {
|
| 2004 | WARN_ON(1);
|
| 2005 | continue;
|
| 2006 | }
|
| 2007 |
|
| 2008 | j = count;
|
| 2009 | list_for_each_safe(l, e, &nd_mapping->labels) {
|
| 2010 | if (!j--)
|
| 2011 | break;
|
| 2012 | list_move_tail(l, &list);
|
| 2013 | }
|
| 2014 | nd_mapping_free_labels(nd_mapping);
|
| 2015 | list_splice_init(&list, &nd_mapping->labels);
|
| 2016 | }
|
| 2017 | }
|
| 2018 |
|
| 2019 | if (count > 1)
|
| 2020 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL);
|
| 2021 |
|
| 2022 | return devs;
|
| 2023 |
|
| 2024 | err:
|
| 2025 | for (i = 0; devs[i]; i++)
|
| 2026 | namespace_pmem_release(devs[i]);
|
| 2027 | kfree(devs);
|
| 2028 |
|
| 2029 | return NULL;
|
| 2030 | }
|
| 2031 |
|
| 2032 | static struct device **create_namespaces(struct nd_region *nd_region)
|
| 2033 | {
|
| 2034 | struct nd_mapping *nd_mapping;
|
| 2035 | struct device **devs;
|
| 2036 | int i;
|
| 2037 |
|
| 2038 | if (nd_region->ndr_mappings == 0)
|
| 2039 | return NULL;
|
| 2040 |
|
| 2041 |
|
| 2042 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 2043 | nd_mapping = &nd_region->mapping[i];
|
| 2044 | mutex_lock_nested(&nd_mapping->lock, i);
|
| 2045 | }
|
| 2046 |
|
| 2047 | devs = scan_labels(nd_region);
|
| 2048 |
|
| 2049 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 2050 | int reverse = nd_region->ndr_mappings - 1 - i;
|
| 2051 |
|
| 2052 | nd_mapping = &nd_region->mapping[reverse];
|
| 2053 | mutex_unlock(&nd_mapping->lock);
|
| 2054 | }
|
| 2055 |
|
| 2056 | return devs;
|
| 2057 | }
|
| 2058 |
|
| 2059 | static void deactivate_labels(void *region)
|
| 2060 | {
|
| 2061 | struct nd_region *nd_region = region;
|
| 2062 | int i;
|
| 2063 |
|
| 2064 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 2065 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 2066 | struct nvdimm_drvdata *ndd = nd_mapping->ndd;
|
| 2067 | struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
| 2068 |
|
| 2069 | mutex_lock(&nd_mapping->lock);
|
| 2070 | nd_mapping_free_labels(nd_mapping);
|
| 2071 | mutex_unlock(&nd_mapping->lock);
|
| 2072 |
|
| 2073 | put_ndd(ndd);
|
| 2074 | nd_mapping->ndd = NULL;
|
| 2075 | if (ndd)
|
| 2076 | atomic_dec(&nvdimm->busy);
|
| 2077 | }
|
| 2078 | }
|
| 2079 |
|
| 2080 | static int init_active_labels(struct nd_region *nd_region)
|
| 2081 | {
|
| 2082 | int i, rc = 0;
|
| 2083 |
|
| 2084 | for (i = 0; i < nd_region->ndr_mappings; i++) {
|
| 2085 | struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
| 2086 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
| 2087 | struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
| 2088 | struct nd_label_ent *label_ent;
|
| 2089 | int count, j;
|
| 2090 |
|
| 2091 | |
| 2092 | * If the dimm is disabled then we may need to prevent
|
| 2093 | * the region from being activated.
|
| 2094 |
|
| 2095 | if (!ndd) {
|
| 2096 | if (test_bit(NDD_LOCKED, &nvdimm->flags))
|
| 2097 | ;
|
| 2098 | else if (test_bit(NDD_LABELING, &nvdimm->flags))
|
| 2099 | ;
|
| 2100 | else
|
| 2101 | continue;
|
| 2102 |
|
| 2103 | dev_err(&nd_region->dev, "%s: is %s, failing probe\n",
|
| 2104 | dev_name(&nd_mapping->nvdimm->dev),
|
| 2105 | test_bit(NDD_LOCKED, &nvdimm->flags)
|
| 2106 | ? "locked" : "disabled");
|
| 2107 | rc = -ENXIO;
|
| 2108 | goto out;
|
| 2109 | }
|
| 2110 | nd_mapping->ndd = ndd;
|
| 2111 | atomic_inc(&nvdimm->busy);
|
| 2112 | get_ndd(ndd);
|
| 2113 |
|
| 2114 | count = nd_label_active_count(ndd);
|
| 2115 | dev_dbg(ndd->dev, "count: %d\n", count);
|
| 2116 | if (!count)
|
| 2117 | continue;
|
| 2118 | for (j = 0; j < count; j++) {
|
| 2119 | struct nd_namespace_label *label;
|
| 2120 |
|
| 2121 | label_ent = kzalloc_obj(*label_ent);
|
| 2122 | if (!label_ent)
|
| 2123 | break;
|
| 2124 | label = nd_label_active(ndd, j);
|
| 2125 | label_ent->label = label;
|
| 2126 |
|
| 2127 | mutex_lock(&nd_mapping->lock);
|
| 2128 | list_add_tail(&label_ent->list, &nd_mapping->labels);
|
| 2129 | mutex_unlock(&nd_mapping->lock);
|
| 2130 | }
|
| 2131 |
|
| 2132 | if (j < count)
|
| 2133 | break;
|
| 2134 | }
|
| 2135 |
|
| 2136 | if (i < nd_region->ndr_mappings)
|
| 2137 | rc = -ENOMEM;
|
| 2138 |
|
| 2139 | out:
|
| 2140 | if (rc) {
|
| 2141 | deactivate_labels(nd_region);
|
| 2142 | return rc;
|
| 2143 | }
|
| 2144 |
|
| 2145 | return devm_add_action_or_reset(&nd_region->dev, deactivate_labels,
|
| 2146 | nd_region);
|
| 2147 | }
|
| 2148 |
|
| 2149 | static int create_relevant_namespaces(struct nd_region *nd_region, int *type,
|
| 2150 | struct device ***devs)
|
| 2151 | {
|
| 2152 | int rc;
|
| 2153 |
|
| 2154 | guard(nvdimm_bus)(&nd_region->dev);
|
| 2155 | rc = init_active_labels(nd_region);
|
| 2156 | if (rc)
|
| 2157 | return rc;
|
| 2158 |
|
| 2159 | *type = nd_region_to_nstype(nd_region);
|
| 2160 | switch (*type) {
|
| 2161 | case ND_DEVICE_NAMESPACE_IO:
|
| 2162 | *devs = create_namespace_io(nd_region);
|
| 2163 | break;
|
| 2164 | case ND_DEVICE_NAMESPACE_PMEM:
|
| 2165 | *devs = create_namespaces(nd_region);
|
| 2166 | break;
|
| 2167 | }
|
| 2168 |
|
| 2169 | return 0;
|
| 2170 | }
|
| 2171 |
|
| 2172 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
|
| 2173 | {
|
| 2174 | struct device **devs = NULL;
|
| 2175 | int i, rc = 0, type;
|
| 2176 |
|
| 2177 | *err = 0;
|
| 2178 | rc = create_relevant_namespaces(nd_region, &type, &devs);
|
| 2179 | if (rc)
|
| 2180 | return rc;
|
| 2181 |
|
| 2182 | if (!devs)
|
| 2183 | return -ENODEV;
|
| 2184 |
|
| 2185 | for (i = 0; devs[i]; i++) {
|
| 2186 | struct device *dev = devs[i];
|
| 2187 | int id;
|
| 2188 |
|
| 2189 | if (type == ND_DEVICE_NAMESPACE_PMEM) {
|
| 2190 | struct nd_namespace_pmem *nspm;
|
| 2191 |
|
| 2192 | nspm = to_nd_namespace_pmem(dev);
|
| 2193 | id = ida_alloc(&nd_region->ns_ida, GFP_KERNEL);
|
| 2194 | nspm->id = id;
|
| 2195 | } else
|
| 2196 | id = i;
|
| 2197 |
|
| 2198 | if (id < 0)
|
| 2199 | break;
|
| 2200 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id);
|
| 2201 | device_initialize(dev);
|
| 2202 | lockdep_set_class(&dev->mutex, &nvdimm_namespace_key);
|
| 2203 | nd_device_register(dev);
|
| 2204 | }
|
| 2205 | if (i)
|
| 2206 | nd_region->ns_seed = devs[0];
|
| 2207 |
|
| 2208 | if (devs[i]) {
|
| 2209 | int j;
|
| 2210 |
|
| 2211 | for (j = i; devs[j]; j++) {
|
| 2212 | struct device *dev = devs[j];
|
| 2213 |
|
| 2214 | device_initialize(dev);
|
| 2215 | put_device(dev);
|
| 2216 | }
|
| 2217 | *err = j - i;
|
| 2218 | |
| 2219 | * All of the namespaces we tried to register failed, so
|
| 2220 | * fail region activation.
|
| 2221 |
|
| 2222 | if (*err == 0)
|
| 2223 | rc = -ENODEV;
|
| 2224 | }
|
| 2225 | kfree(devs);
|
| 2226 |
|
| 2227 | if (rc == -ENODEV)
|
| 2228 | return rc;
|
| 2229 |
|
| 2230 | return i;
|
| 2231 | }
|