Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/nd.h> |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 17 | #include "nd-core.h" |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 18 | #include "nd.h" |
| 19 | |
| 20 | static void namespace_io_release(struct device *dev) |
| 21 | { |
| 22 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 23 | |
| 24 | kfree(nsio); |
| 25 | } |
| 26 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 27 | static void namespace_pmem_release(struct device *dev) |
| 28 | { |
| 29 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 30 | |
| 31 | kfree(nspm->alt_name); |
| 32 | kfree(nspm->uuid); |
| 33 | kfree(nspm); |
| 34 | } |
| 35 | |
| 36 | static void namespace_blk_release(struct device *dev) |
| 37 | { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 38 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 39 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 40 | |
| 41 | if (nsblk->id >= 0) |
| 42 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); |
| 43 | kfree(nsblk->alt_name); |
| 44 | kfree(nsblk->uuid); |
| 45 | kfree(nsblk->res); |
| 46 | kfree(nsblk); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 47 | } |
| 48 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 49 | static struct device_type namespace_io_device_type = { |
| 50 | .name = "nd_namespace_io", |
| 51 | .release = namespace_io_release, |
| 52 | }; |
| 53 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 54 | static struct device_type namespace_pmem_device_type = { |
| 55 | .name = "nd_namespace_pmem", |
| 56 | .release = namespace_pmem_release, |
| 57 | }; |
| 58 | |
| 59 | static struct device_type namespace_blk_device_type = { |
| 60 | .name = "nd_namespace_blk", |
| 61 | .release = namespace_blk_release, |
| 62 | }; |
| 63 | |
| 64 | static bool is_namespace_pmem(struct device *dev) |
| 65 | { |
| 66 | return dev ? dev->type == &namespace_pmem_device_type : false; |
| 67 | } |
| 68 | |
| 69 | static bool is_namespace_blk(struct device *dev) |
| 70 | { |
| 71 | return dev ? dev->type == &namespace_blk_device_type : false; |
| 72 | } |
| 73 | |
| 74 | static bool is_namespace_io(struct device *dev) |
| 75 | { |
| 76 | return dev ? dev->type == &namespace_io_device_type : false; |
| 77 | } |
| 78 | |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 79 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
| 80 | char *name) |
| 81 | { |
| 82 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); |
| 83 | const char *suffix = ""; |
| 84 | |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 85 | if (ndns->claim) { |
| 86 | if (is_nd_btt(ndns->claim)) |
| 87 | suffix = "s"; |
| 88 | else if (is_nd_pfn(ndns->claim)) |
| 89 | suffix = "m"; |
| 90 | else |
| 91 | dev_WARN_ONCE(&ndns->dev, 1, |
| 92 | "unknown claim type by %s\n", |
| 93 | dev_name(ndns->claim)); |
| 94 | } |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 95 | |
| 96 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) |
| 97 | sprintf(name, "pmem%d%s", nd_region->id, suffix); |
| 98 | else if (is_namespace_blk(&ndns->dev)) { |
| 99 | struct nd_namespace_blk *nsblk; |
| 100 | |
| 101 | nsblk = to_nd_namespace_blk(&ndns->dev); |
| 102 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, suffix); |
| 103 | } else { |
| 104 | return NULL; |
| 105 | } |
| 106 | |
| 107 | return name; |
| 108 | } |
| 109 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); |
| 110 | |
Vishal Verma | 6ec6895 | 2015-07-29 14:58:09 -0600 | [diff] [blame] | 111 | const u8 *nd_dev_to_uuid(struct device *dev) |
| 112 | { |
| 113 | static const u8 null_uuid[16]; |
| 114 | |
| 115 | if (!dev) |
| 116 | return null_uuid; |
| 117 | |
| 118 | if (is_namespace_pmem(dev)) { |
| 119 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 120 | |
| 121 | return nspm->uuid; |
| 122 | } else if (is_namespace_blk(dev)) { |
| 123 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 124 | |
| 125 | return nsblk->uuid; |
| 126 | } else |
| 127 | return null_uuid; |
| 128 | } |
| 129 | EXPORT_SYMBOL(nd_dev_to_uuid); |
| 130 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 131 | static ssize_t nstype_show(struct device *dev, |
| 132 | struct device_attribute *attr, char *buf) |
| 133 | { |
| 134 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 135 | |
| 136 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); |
| 137 | } |
| 138 | static DEVICE_ATTR_RO(nstype); |
| 139 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 140 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
| 141 | const size_t len) |
| 142 | { |
| 143 | char *input, *pos, *alt_name, **ns_altname; |
| 144 | ssize_t rc; |
| 145 | |
| 146 | if (is_namespace_pmem(dev)) { |
| 147 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 148 | |
| 149 | ns_altname = &nspm->alt_name; |
| 150 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 151 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 152 | |
| 153 | ns_altname = &nsblk->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 154 | } else |
| 155 | return -ENXIO; |
| 156 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 157 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 158 | return -EBUSY; |
| 159 | |
| 160 | input = kmemdup(buf, len + 1, GFP_KERNEL); |
| 161 | if (!input) |
| 162 | return -ENOMEM; |
| 163 | |
| 164 | input[len] = '\0'; |
| 165 | pos = strim(input); |
| 166 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { |
| 167 | rc = -EINVAL; |
| 168 | goto out; |
| 169 | } |
| 170 | |
| 171 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); |
| 172 | if (!alt_name) { |
| 173 | rc = -ENOMEM; |
| 174 | goto out; |
| 175 | } |
| 176 | kfree(*ns_altname); |
| 177 | *ns_altname = alt_name; |
| 178 | sprintf(*ns_altname, "%s", pos); |
| 179 | rc = len; |
| 180 | |
| 181 | out: |
| 182 | kfree(input); |
| 183 | return rc; |
| 184 | } |
| 185 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 186 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
| 187 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 188 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 189 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 190 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 191 | struct nd_label_id label_id; |
| 192 | resource_size_t size = 0; |
| 193 | struct resource *res; |
| 194 | |
| 195 | if (!nsblk->uuid) |
| 196 | return 0; |
| 197 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
| 198 | for_each_dpa_resource(ndd, res) |
| 199 | if (strcmp(res->name, label_id.id) == 0) |
| 200 | size += resource_size(res); |
| 201 | return size; |
| 202 | } |
| 203 | |
Ross Zwisler | 047fc8a | 2015-06-25 04:21:02 -0400 | [diff] [blame] | 204 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
| 205 | { |
| 206 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
| 207 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 208 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 209 | struct nd_label_id label_id; |
| 210 | struct resource *res; |
| 211 | int count, i; |
| 212 | |
| 213 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) |
| 214 | return false; |
| 215 | |
| 216 | count = 0; |
| 217 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
| 218 | for_each_dpa_resource(ndd, res) { |
| 219 | if (strcmp(res->name, label_id.id) != 0) |
| 220 | continue; |
| 221 | /* |
| 222 | * Resources with unacknoweldged adjustments indicate a |
| 223 | * failure to update labels |
| 224 | */ |
| 225 | if (res->flags & DPA_RESOURCE_ADJUSTED) |
| 226 | return false; |
| 227 | count++; |
| 228 | } |
| 229 | |
| 230 | /* These values match after a successful label update */ |
| 231 | if (count != nsblk->num_resources) |
| 232 | return false; |
| 233 | |
| 234 | for (i = 0; i < nsblk->num_resources; i++) { |
| 235 | struct resource *found = NULL; |
| 236 | |
| 237 | for_each_dpa_resource(ndd, res) |
| 238 | if (res == nsblk->res[i]) { |
| 239 | found = res; |
| 240 | break; |
| 241 | } |
| 242 | /* stale resource */ |
| 243 | if (!found) |
| 244 | return false; |
| 245 | } |
| 246 | |
| 247 | return true; |
| 248 | } |
| 249 | |
| 250 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
| 251 | { |
| 252 | resource_size_t size; |
| 253 | |
| 254 | nvdimm_bus_lock(&nsblk->common.dev); |
| 255 | size = __nd_namespace_blk_validate(nsblk); |
| 256 | nvdimm_bus_unlock(&nsblk->common.dev); |
| 257 | |
| 258 | return size; |
| 259 | } |
| 260 | EXPORT_SYMBOL(nd_namespace_blk_validate); |
| 261 | |
| 262 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 263 | static int nd_namespace_label_update(struct nd_region *nd_region, |
| 264 | struct device *dev) |
| 265 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 266 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 267 | "namespace must be idle during label update\n"); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 268 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 269 | return 0; |
| 270 | |
| 271 | /* |
| 272 | * Only allow label writes that will result in a valid namespace |
| 273 | * or deletion of an existing namespace. |
| 274 | */ |
| 275 | if (is_namespace_pmem(dev)) { |
| 276 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 277 | resource_size_t size = resource_size(&nspm->nsio.res); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 278 | |
| 279 | if (size == 0 && nspm->uuid) |
| 280 | /* delete allocation */; |
| 281 | else if (!nspm->uuid) |
| 282 | return 0; |
| 283 | |
| 284 | return nd_pmem_namespace_label_update(nd_region, nspm, size); |
| 285 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 286 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 287 | resource_size_t size = nd_namespace_blk_size(nsblk); |
| 288 | |
| 289 | if (size == 0 && nsblk->uuid) |
| 290 | /* delete allocation */; |
| 291 | else if (!nsblk->uuid || !nsblk->lbasize) |
| 292 | return 0; |
| 293 | |
| 294 | return nd_blk_namespace_label_update(nd_region, nsblk, size); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 295 | } else |
| 296 | return -ENXIO; |
| 297 | } |
| 298 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 299 | static ssize_t alt_name_store(struct device *dev, |
| 300 | struct device_attribute *attr, const char *buf, size_t len) |
| 301 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 302 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 303 | ssize_t rc; |
| 304 | |
| 305 | device_lock(dev); |
| 306 | nvdimm_bus_lock(dev); |
| 307 | wait_nvdimm_bus_probe_idle(dev); |
| 308 | rc = __alt_name_store(dev, buf, len); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 309 | if (rc >= 0) |
| 310 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 311 | dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc); |
| 312 | nvdimm_bus_unlock(dev); |
| 313 | device_unlock(dev); |
| 314 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 315 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | static ssize_t alt_name_show(struct device *dev, |
| 319 | struct device_attribute *attr, char *buf) |
| 320 | { |
| 321 | char *ns_altname; |
| 322 | |
| 323 | if (is_namespace_pmem(dev)) { |
| 324 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 325 | |
| 326 | ns_altname = nspm->alt_name; |
| 327 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 328 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 329 | |
| 330 | ns_altname = nsblk->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 331 | } else |
| 332 | return -ENXIO; |
| 333 | |
| 334 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); |
| 335 | } |
| 336 | static DEVICE_ATTR_RW(alt_name); |
| 337 | |
| 338 | static int scan_free(struct nd_region *nd_region, |
| 339 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 340 | resource_size_t n) |
| 341 | { |
| 342 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; |
| 343 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 344 | int rc = 0; |
| 345 | |
| 346 | while (n) { |
| 347 | struct resource *res, *last; |
| 348 | resource_size_t new_start; |
| 349 | |
| 350 | last = NULL; |
| 351 | for_each_dpa_resource(ndd, res) |
| 352 | if (strcmp(res->name, label_id->id) == 0) |
| 353 | last = res; |
| 354 | res = last; |
| 355 | if (!res) |
| 356 | return 0; |
| 357 | |
| 358 | if (n >= resource_size(res)) { |
| 359 | n -= resource_size(res); |
| 360 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); |
| 361 | nvdimm_free_dpa(ndd, res); |
| 362 | /* retry with last resource deleted */ |
| 363 | continue; |
| 364 | } |
| 365 | |
| 366 | /* |
| 367 | * Keep BLK allocations relegated to high DPA as much as |
| 368 | * possible |
| 369 | */ |
| 370 | if (is_blk) |
| 371 | new_start = res->start + n; |
| 372 | else |
| 373 | new_start = res->start; |
| 374 | |
| 375 | rc = adjust_resource(res, new_start, resource_size(res) - n); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 376 | if (rc == 0) |
| 377 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 378 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
| 379 | break; |
| 380 | } |
| 381 | |
| 382 | return rc; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id |
| 387 | * @nd_region: the set of dimms to reclaim @n bytes from |
| 388 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 389 | * @n: number of bytes per-dimm to release |
| 390 | * |
| 391 | * Assumes resources are ordered. Starting from the end try to |
| 392 | * adjust_resource() the allocation to @n, but if @n is larger than the |
| 393 | * allocation delete it and find the 'new' last allocation in the label |
| 394 | * set. |
| 395 | */ |
| 396 | static int shrink_dpa_allocation(struct nd_region *nd_region, |
| 397 | struct nd_label_id *label_id, resource_size_t n) |
| 398 | { |
| 399 | int i; |
| 400 | |
| 401 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 402 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 403 | int rc; |
| 404 | |
| 405 | rc = scan_free(nd_region, nd_mapping, label_id, n); |
| 406 | if (rc) |
| 407 | return rc; |
| 408 | } |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, |
| 414 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, |
| 415 | resource_size_t n) |
| 416 | { |
| 417 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; |
| 418 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 419 | resource_size_t first_dpa; |
| 420 | struct resource *res; |
| 421 | int rc = 0; |
| 422 | |
| 423 | /* allocate blk from highest dpa first */ |
| 424 | if (is_blk) |
| 425 | first_dpa = nd_mapping->start + nd_mapping->size - n; |
| 426 | else |
| 427 | first_dpa = nd_mapping->start; |
| 428 | |
| 429 | /* first resource allocation for this label-id or dimm */ |
| 430 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); |
| 431 | if (!res) |
| 432 | rc = -EBUSY; |
| 433 | |
| 434 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); |
| 435 | return rc ? n : 0; |
| 436 | } |
| 437 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 438 | static bool space_valid(bool is_pmem, bool is_reserve, |
| 439 | struct nd_label_id *label_id, struct resource *res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 440 | { |
| 441 | /* |
| 442 | * For BLK-space any space is valid, for PMEM-space, it must be |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 443 | * contiguous with an existing allocation unless we are |
| 444 | * reserving pmem. |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 445 | */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 446 | if (is_reserve || !is_pmem) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 447 | return true; |
| 448 | if (!res || strcmp(res->name, label_id->id) == 0) |
| 449 | return true; |
| 450 | return false; |
| 451 | } |
| 452 | |
| 453 | enum alloc_loc { |
| 454 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, |
| 455 | }; |
| 456 | |
| 457 | static resource_size_t scan_allocate(struct nd_region *nd_region, |
| 458 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 459 | resource_size_t n) |
| 460 | { |
| 461 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 462 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 463 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
| 464 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 465 | const resource_size_t to_allocate = n; |
| 466 | struct resource *res; |
| 467 | int first; |
| 468 | |
| 469 | retry: |
| 470 | first = 0; |
| 471 | for_each_dpa_resource(ndd, res) { |
| 472 | resource_size_t allocate, available = 0, free_start, free_end; |
| 473 | struct resource *next = res->sibling, *new_res = NULL; |
| 474 | enum alloc_loc loc = ALLOC_ERR; |
| 475 | const char *action; |
| 476 | int rc = 0; |
| 477 | |
| 478 | /* ignore resources outside this nd_mapping */ |
| 479 | if (res->start > mapping_end) |
| 480 | continue; |
| 481 | if (res->end < nd_mapping->start) |
| 482 | continue; |
| 483 | |
| 484 | /* space at the beginning of the mapping */ |
| 485 | if (!first++ && res->start > nd_mapping->start) { |
| 486 | free_start = nd_mapping->start; |
| 487 | available = res->start - free_start; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 488 | if (space_valid(is_pmem, is_reserve, label_id, NULL)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 489 | loc = ALLOC_BEFORE; |
| 490 | } |
| 491 | |
| 492 | /* space between allocations */ |
| 493 | if (!loc && next) { |
| 494 | free_start = res->start + resource_size(res); |
| 495 | free_end = min(mapping_end, next->start - 1); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 496 | if (space_valid(is_pmem, is_reserve, label_id, res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 497 | && free_start < free_end) { |
| 498 | available = free_end + 1 - free_start; |
| 499 | loc = ALLOC_MID; |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /* space at the end of the mapping */ |
| 504 | if (!loc && !next) { |
| 505 | free_start = res->start + resource_size(res); |
| 506 | free_end = mapping_end; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 507 | if (space_valid(is_pmem, is_reserve, label_id, res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 508 | && free_start < free_end) { |
| 509 | available = free_end + 1 - free_start; |
| 510 | loc = ALLOC_AFTER; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | if (!loc || !available) |
| 515 | continue; |
| 516 | allocate = min(available, n); |
| 517 | switch (loc) { |
| 518 | case ALLOC_BEFORE: |
| 519 | if (strcmp(res->name, label_id->id) == 0) { |
| 520 | /* adjust current resource up */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 521 | if (is_pmem && !is_reserve) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 522 | return n; |
| 523 | rc = adjust_resource(res, res->start - allocate, |
| 524 | resource_size(res) + allocate); |
| 525 | action = "cur grow up"; |
| 526 | } else |
| 527 | action = "allocate"; |
| 528 | break; |
| 529 | case ALLOC_MID: |
| 530 | if (strcmp(next->name, label_id->id) == 0) { |
| 531 | /* adjust next resource up */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 532 | if (is_pmem && !is_reserve) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 533 | return n; |
| 534 | rc = adjust_resource(next, next->start |
| 535 | - allocate, resource_size(next) |
| 536 | + allocate); |
| 537 | new_res = next; |
| 538 | action = "next grow up"; |
| 539 | } else if (strcmp(res->name, label_id->id) == 0) { |
| 540 | action = "grow down"; |
| 541 | } else |
| 542 | action = "allocate"; |
| 543 | break; |
| 544 | case ALLOC_AFTER: |
| 545 | if (strcmp(res->name, label_id->id) == 0) |
| 546 | action = "grow down"; |
| 547 | else |
| 548 | action = "allocate"; |
| 549 | break; |
| 550 | default: |
| 551 | return n; |
| 552 | } |
| 553 | |
| 554 | if (strcmp(action, "allocate") == 0) { |
| 555 | /* BLK allocate bottom up */ |
| 556 | if (!is_pmem) |
| 557 | free_start += available - allocate; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 558 | else if (!is_reserve && free_start != nd_mapping->start) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 559 | return n; |
| 560 | |
| 561 | new_res = nvdimm_allocate_dpa(ndd, label_id, |
| 562 | free_start, allocate); |
| 563 | if (!new_res) |
| 564 | rc = -EBUSY; |
| 565 | } else if (strcmp(action, "grow down") == 0) { |
| 566 | /* adjust current resource down */ |
| 567 | rc = adjust_resource(res, res->start, resource_size(res) |
| 568 | + allocate); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 569 | if (rc == 0) |
| 570 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | if (!new_res) |
| 574 | new_res = res; |
| 575 | |
| 576 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", |
| 577 | action, loc, rc); |
| 578 | |
| 579 | if (rc) |
| 580 | return n; |
| 581 | |
| 582 | n -= allocate; |
| 583 | if (n) { |
| 584 | /* |
| 585 | * Retry scan with newly inserted resources. |
| 586 | * For example, if we did an ALLOC_BEFORE |
| 587 | * insertion there may also have been space |
| 588 | * available for an ALLOC_AFTER insertion, so we |
| 589 | * need to check this same resource again |
| 590 | */ |
| 591 | goto retry; |
| 592 | } else |
| 593 | return 0; |
| 594 | } |
| 595 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 596 | /* |
| 597 | * If we allocated nothing in the BLK case it may be because we are in |
| 598 | * an initial "pmem-reserve pass". Only do an initial BLK allocation |
| 599 | * when none of the DPA space is reserved. |
| 600 | */ |
| 601 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 602 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
| 603 | return n; |
| 604 | } |
| 605 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 606 | static int merge_dpa(struct nd_region *nd_region, |
| 607 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) |
| 608 | { |
| 609 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 610 | struct resource *res; |
| 611 | |
| 612 | if (strncmp("pmem", label_id->id, 4) == 0) |
| 613 | return 0; |
| 614 | retry: |
| 615 | for_each_dpa_resource(ndd, res) { |
| 616 | int rc; |
| 617 | struct resource *next = res->sibling; |
| 618 | resource_size_t end = res->start + resource_size(res); |
| 619 | |
| 620 | if (!next || strcmp(res->name, label_id->id) != 0 |
| 621 | || strcmp(next->name, label_id->id) != 0 |
| 622 | || end != next->start) |
| 623 | continue; |
| 624 | end += resource_size(next); |
| 625 | nvdimm_free_dpa(ndd, next); |
| 626 | rc = adjust_resource(res, res->start, end - res->start); |
| 627 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); |
| 628 | if (rc) |
| 629 | return rc; |
| 630 | res->flags |= DPA_RESOURCE_ADJUSTED; |
| 631 | goto retry; |
| 632 | } |
| 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int __reserve_free_pmem(struct device *dev, void *data) |
| 638 | { |
| 639 | struct nvdimm *nvdimm = data; |
| 640 | struct nd_region *nd_region; |
| 641 | struct nd_label_id label_id; |
| 642 | int i; |
| 643 | |
| 644 | if (!is_nd_pmem(dev)) |
| 645 | return 0; |
| 646 | |
| 647 | nd_region = to_nd_region(dev); |
| 648 | if (nd_region->ndr_mappings == 0) |
| 649 | return 0; |
| 650 | |
| 651 | memset(&label_id, 0, sizeof(label_id)); |
| 652 | strcat(label_id.id, "pmem-reserve"); |
| 653 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 654 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 655 | resource_size_t n, rem = 0; |
| 656 | |
| 657 | if (nd_mapping->nvdimm != nvdimm) |
| 658 | continue; |
| 659 | |
| 660 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); |
| 661 | if (n == 0) |
| 662 | return 0; |
| 663 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); |
| 664 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 665 | "pmem reserve underrun: %#llx of %#llx bytes\n", |
| 666 | (unsigned long long) n - rem, |
| 667 | (unsigned long long) n); |
| 668 | return rem ? -ENXIO : 0; |
| 669 | } |
| 670 | |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
| 675 | struct nd_mapping *nd_mapping) |
| 676 | { |
| 677 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 678 | struct resource *res, *_res; |
| 679 | |
| 680 | for_each_dpa_resource_safe(ndd, res, _res) |
| 681 | if (strcmp(res->name, "pmem-reserve") == 0) |
| 682 | nvdimm_free_dpa(ndd, res); |
| 683 | } |
| 684 | |
| 685 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, |
| 686 | struct nd_mapping *nd_mapping) |
| 687 | { |
| 688 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 689 | int rc; |
| 690 | |
| 691 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, |
| 692 | __reserve_free_pmem); |
| 693 | if (rc) |
| 694 | release_free_pmem(nvdimm_bus, nd_mapping); |
| 695 | return rc; |
| 696 | } |
| 697 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 698 | /** |
| 699 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id |
| 700 | * @nd_region: the set of dimms to allocate @n more bytes from |
| 701 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 702 | * @n: number of bytes per-dimm to add to the existing allocation |
| 703 | * |
| 704 | * Assumes resources are ordered. For BLK regions, first consume |
| 705 | * BLK-only available DPA free space, then consume PMEM-aliased DPA |
| 706 | * space starting at the highest DPA. For PMEM regions start |
| 707 | * allocations from the start of an interleave set and end at the first |
| 708 | * BLK allocation or the end of the interleave set, whichever comes |
| 709 | * first. |
| 710 | */ |
| 711 | static int grow_dpa_allocation(struct nd_region *nd_region, |
| 712 | struct nd_label_id *label_id, resource_size_t n) |
| 713 | { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 714 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
| 715 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 716 | int i; |
| 717 | |
| 718 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 719 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 720 | resource_size_t rem = n; |
| 721 | int rc, j; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 722 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 723 | /* |
| 724 | * In the BLK case try once with all unallocated PMEM |
| 725 | * reserved, and once without |
| 726 | */ |
| 727 | for (j = is_pmem; j < 2; j++) { |
| 728 | bool blk_only = j == 0; |
| 729 | |
| 730 | if (blk_only) { |
| 731 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); |
| 732 | if (rc) |
| 733 | return rc; |
| 734 | } |
| 735 | rem = scan_allocate(nd_region, nd_mapping, |
| 736 | label_id, rem); |
| 737 | if (blk_only) |
| 738 | release_free_pmem(nvdimm_bus, nd_mapping); |
| 739 | |
| 740 | /* try again and allow encroachments into PMEM */ |
| 741 | if (rem == 0) |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 746 | "allocation underrun: %#llx of %#llx bytes\n", |
| 747 | (unsigned long long) n - rem, |
| 748 | (unsigned long long) n); |
| 749 | if (rem) |
| 750 | return -ENXIO; |
| 751 | |
| 752 | rc = merge_dpa(nd_region, nd_mapping, label_id); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 753 | if (rc) |
| 754 | return rc; |
| 755 | } |
| 756 | |
| 757 | return 0; |
| 758 | } |
| 759 | |
| 760 | static void nd_namespace_pmem_set_size(struct nd_region *nd_region, |
| 761 | struct nd_namespace_pmem *nspm, resource_size_t size) |
| 762 | { |
| 763 | struct resource *res = &nspm->nsio.res; |
| 764 | |
| 765 | res->start = nd_region->ndr_start; |
| 766 | res->end = nd_region->ndr_start + size - 1; |
| 767 | } |
| 768 | |
| 769 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
| 770 | { |
| 771 | resource_size_t allocated = 0, available = 0; |
| 772 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 773 | struct nd_mapping *nd_mapping; |
| 774 | struct nvdimm_drvdata *ndd; |
| 775 | struct nd_label_id label_id; |
| 776 | u32 flags = 0, remainder; |
| 777 | u8 *uuid = NULL; |
| 778 | int rc, i; |
| 779 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 780 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 781 | return -EBUSY; |
| 782 | |
| 783 | if (is_namespace_pmem(dev)) { |
| 784 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 785 | |
| 786 | uuid = nspm->uuid; |
| 787 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 788 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 789 | |
| 790 | uuid = nsblk->uuid; |
| 791 | flags = NSLABEL_FLAG_LOCAL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | /* |
| 795 | * We need a uuid for the allocation-label and dimm(s) on which |
| 796 | * to store the label. |
| 797 | */ |
| 798 | if (!uuid || nd_region->ndr_mappings == 0) |
| 799 | return -ENXIO; |
| 800 | |
| 801 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); |
| 802 | if (remainder) { |
| 803 | dev_dbg(dev, "%llu is not %dK aligned\n", val, |
| 804 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); |
| 805 | return -EINVAL; |
| 806 | } |
| 807 | |
| 808 | nd_label_gen_id(&label_id, uuid, flags); |
| 809 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 810 | nd_mapping = &nd_region->mapping[i]; |
| 811 | ndd = to_ndd(nd_mapping); |
| 812 | |
| 813 | /* |
| 814 | * All dimms in an interleave set, or the base dimm for a blk |
| 815 | * region, need to be enabled for the size to be changed. |
| 816 | */ |
| 817 | if (!ndd) |
| 818 | return -ENXIO; |
| 819 | |
| 820 | allocated += nvdimm_allocated_dpa(ndd, &label_id); |
| 821 | } |
| 822 | available = nd_region_available_dpa(nd_region); |
| 823 | |
| 824 | if (val > available + allocated) |
| 825 | return -ENOSPC; |
| 826 | |
| 827 | if (val == allocated) |
| 828 | return 0; |
| 829 | |
| 830 | val = div_u64(val, nd_region->ndr_mappings); |
| 831 | allocated = div_u64(allocated, nd_region->ndr_mappings); |
| 832 | if (val < allocated) |
| 833 | rc = shrink_dpa_allocation(nd_region, &label_id, |
| 834 | allocated - val); |
| 835 | else |
| 836 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); |
| 837 | |
| 838 | if (rc) |
| 839 | return rc; |
| 840 | |
| 841 | if (is_namespace_pmem(dev)) { |
| 842 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 843 | |
| 844 | nd_namespace_pmem_set_size(nd_region, nspm, |
| 845 | val * nd_region->ndr_mappings); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 846 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 847 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 848 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 849 | /* |
| 850 | * Try to delete the namespace if we deleted all of its |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 851 | * allocation, this is not the seed device for the |
| 852 | * region, and it is not actively claimed by a btt |
| 853 | * instance. |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 854 | */ |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 855 | if (val == 0 && nd_region->ns_seed != dev |
| 856 | && !nsblk->common.claim) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 857 | nd_device_unregister(dev, ND_ASYNC); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | return rc; |
| 861 | } |
| 862 | |
| 863 | static ssize_t size_store(struct device *dev, |
| 864 | struct device_attribute *attr, const char *buf, size_t len) |
| 865 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 866 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 867 | unsigned long long val; |
| 868 | u8 **uuid = NULL; |
| 869 | int rc; |
| 870 | |
| 871 | rc = kstrtoull(buf, 0, &val); |
| 872 | if (rc) |
| 873 | return rc; |
| 874 | |
| 875 | device_lock(dev); |
| 876 | nvdimm_bus_lock(dev); |
| 877 | wait_nvdimm_bus_probe_idle(dev); |
| 878 | rc = __size_store(dev, val); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 879 | if (rc >= 0) |
| 880 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 881 | |
| 882 | if (is_namespace_pmem(dev)) { |
| 883 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 884 | |
| 885 | uuid = &nspm->uuid; |
| 886 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 887 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 888 | |
| 889 | uuid = &nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | if (rc == 0 && val == 0 && uuid) { |
| 893 | /* setting size zero == 'delete namespace' */ |
| 894 | kfree(*uuid); |
| 895 | *uuid = NULL; |
| 896 | } |
| 897 | |
| 898 | dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0 |
| 899 | ? "fail" : "success", rc); |
| 900 | |
| 901 | nvdimm_bus_unlock(dev); |
| 902 | device_unlock(dev); |
| 903 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 904 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 905 | } |
| 906 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 907 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 908 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 909 | struct device *dev = &ndns->dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 910 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 911 | if (is_namespace_pmem(dev)) { |
| 912 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 913 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 914 | return resource_size(&nspm->nsio.res); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 915 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 916 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 917 | } else if (is_namespace_io(dev)) { |
| 918 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 919 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 920 | return resource_size(&nsio->res); |
| 921 | } else |
| 922 | WARN_ONCE(1, "unknown namespace type\n"); |
| 923 | return 0; |
| 924 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 925 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 926 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
| 927 | { |
| 928 | resource_size_t size; |
| 929 | |
| 930 | nvdimm_bus_lock(&ndns->dev); |
| 931 | size = __nvdimm_namespace_capacity(ndns); |
| 932 | nvdimm_bus_unlock(&ndns->dev); |
| 933 | |
| 934 | return size; |
| 935 | } |
| 936 | EXPORT_SYMBOL(nvdimm_namespace_capacity); |
| 937 | |
| 938 | static ssize_t size_show(struct device *dev, |
| 939 | struct device_attribute *attr, char *buf) |
| 940 | { |
| 941 | return sprintf(buf, "%llu\n", (unsigned long long) |
| 942 | nvdimm_namespace_capacity(to_ndns(dev))); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 943 | } |
| 944 | static DEVICE_ATTR(size, S_IRUGO, size_show, size_store); |
| 945 | |
| 946 | static ssize_t uuid_show(struct device *dev, |
| 947 | struct device_attribute *attr, char *buf) |
| 948 | { |
| 949 | u8 *uuid; |
| 950 | |
| 951 | if (is_namespace_pmem(dev)) { |
| 952 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 953 | |
| 954 | uuid = nspm->uuid; |
| 955 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 956 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 957 | |
| 958 | uuid = nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 959 | } else |
| 960 | return -ENXIO; |
| 961 | |
| 962 | if (uuid) |
| 963 | return sprintf(buf, "%pUb\n", uuid); |
| 964 | return sprintf(buf, "\n"); |
| 965 | } |
| 966 | |
| 967 | /** |
| 968 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" |
| 969 | * @nd_region: parent region so we can updates all dimms in the set |
| 970 | * @dev: namespace type for generating label_id |
| 971 | * @new_uuid: incoming uuid |
| 972 | * @old_uuid: reference to the uuid storage location in the namespace object |
| 973 | */ |
| 974 | static int namespace_update_uuid(struct nd_region *nd_region, |
| 975 | struct device *dev, u8 *new_uuid, u8 **old_uuid) |
| 976 | { |
| 977 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; |
| 978 | struct nd_label_id old_label_id; |
| 979 | struct nd_label_id new_label_id; |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 980 | int i; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 981 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 982 | if (!nd_is_uuid_unique(dev, new_uuid)) |
| 983 | return -EINVAL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 984 | |
| 985 | if (*old_uuid == NULL) |
| 986 | goto out; |
| 987 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 988 | /* |
| 989 | * If we've already written a label with this uuid, then it's |
| 990 | * too late to rename because we can't reliably update the uuid |
| 991 | * without losing the old namespace. Userspace must delete this |
| 992 | * namespace to abandon the old uuid. |
| 993 | */ |
| 994 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 995 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 996 | |
| 997 | /* |
| 998 | * This check by itself is sufficient because old_uuid |
| 999 | * would be NULL above if this uuid did not exist in the |
| 1000 | * currently written set. |
| 1001 | * |
| 1002 | * FIXME: can we delete uuid with zero dpa allocated? |
| 1003 | */ |
| 1004 | if (nd_mapping->labels) |
| 1005 | return -EBUSY; |
| 1006 | } |
| 1007 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1008 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
| 1009 | nd_label_gen_id(&new_label_id, new_uuid, flags); |
| 1010 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1011 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1012 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1013 | struct resource *res; |
| 1014 | |
| 1015 | for_each_dpa_resource(ndd, res) |
| 1016 | if (strcmp(res->name, old_label_id.id) == 0) |
| 1017 | sprintf((void *) res->name, "%s", |
| 1018 | new_label_id.id); |
| 1019 | } |
| 1020 | kfree(*old_uuid); |
| 1021 | out: |
| 1022 | *old_uuid = new_uuid; |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
| 1026 | static ssize_t uuid_store(struct device *dev, |
| 1027 | struct device_attribute *attr, const char *buf, size_t len) |
| 1028 | { |
| 1029 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 1030 | u8 *uuid = NULL; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1031 | ssize_t rc = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1032 | u8 **ns_uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1033 | |
| 1034 | if (is_namespace_pmem(dev)) { |
| 1035 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1036 | |
| 1037 | ns_uuid = &nspm->uuid; |
| 1038 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1039 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 1040 | |
| 1041 | ns_uuid = &nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1042 | } else |
| 1043 | return -ENXIO; |
| 1044 | |
| 1045 | device_lock(dev); |
| 1046 | nvdimm_bus_lock(dev); |
| 1047 | wait_nvdimm_bus_probe_idle(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1048 | if (to_ndns(dev)->claim) |
| 1049 | rc = -EBUSY; |
| 1050 | if (rc >= 0) |
| 1051 | rc = nd_uuid_store(dev, &uuid, buf, len); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1052 | if (rc >= 0) |
| 1053 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1054 | if (rc >= 0) |
| 1055 | rc = nd_namespace_label_update(nd_region, dev); |
| 1056 | else |
| 1057 | kfree(uuid); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1058 | dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, |
| 1059 | rc, buf, buf[len - 1] == '\n' ? "" : "\n"); |
| 1060 | nvdimm_bus_unlock(dev); |
| 1061 | device_unlock(dev); |
| 1062 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1063 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1064 | } |
| 1065 | static DEVICE_ATTR_RW(uuid); |
| 1066 | |
| 1067 | static ssize_t resource_show(struct device *dev, |
| 1068 | struct device_attribute *attr, char *buf) |
| 1069 | { |
| 1070 | struct resource *res; |
| 1071 | |
| 1072 | if (is_namespace_pmem(dev)) { |
| 1073 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1074 | |
| 1075 | res = &nspm->nsio.res; |
| 1076 | } else if (is_namespace_io(dev)) { |
| 1077 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 1078 | |
| 1079 | res = &nsio->res; |
| 1080 | } else |
| 1081 | return -ENXIO; |
| 1082 | |
| 1083 | /* no address to convey if the namespace has no allocation */ |
| 1084 | if (resource_size(res) == 0) |
| 1085 | return -ENXIO; |
| 1086 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); |
| 1087 | } |
| 1088 | static DEVICE_ATTR_RO(resource); |
| 1089 | |
Vishal Verma | fcae695 | 2015-06-25 04:22:39 -0400 | [diff] [blame] | 1090 | static const unsigned long ns_lbasize_supported[] = { 512, 520, 528, |
| 1091 | 4096, 4104, 4160, 4224, 0 }; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1092 | |
| 1093 | static ssize_t sector_size_show(struct device *dev, |
| 1094 | struct device_attribute *attr, char *buf) |
| 1095 | { |
| 1096 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 1097 | |
| 1098 | if (!is_namespace_blk(dev)) |
| 1099 | return -ENXIO; |
| 1100 | |
| 1101 | return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf); |
| 1102 | } |
| 1103 | |
| 1104 | static ssize_t sector_size_store(struct device *dev, |
| 1105 | struct device_attribute *attr, const char *buf, size_t len) |
| 1106 | { |
| 1107 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1108 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1109 | ssize_t rc = 0; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1110 | |
| 1111 | if (!is_namespace_blk(dev)) |
| 1112 | return -ENXIO; |
| 1113 | |
| 1114 | device_lock(dev); |
| 1115 | nvdimm_bus_lock(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1116 | if (to_ndns(dev)->claim) |
| 1117 | rc = -EBUSY; |
| 1118 | if (rc >= 0) |
| 1119 | rc = nd_sector_size_store(dev, buf, &nsblk->lbasize, |
| 1120 | ns_lbasize_supported); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1121 | if (rc >= 0) |
| 1122 | rc = nd_namespace_label_update(nd_region, dev); |
| 1123 | dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__, |
| 1124 | rc, rc < 0 ? "tried" : "wrote", buf, |
| 1125 | buf[len - 1] == '\n' ? "" : "\n"); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1126 | nvdimm_bus_unlock(dev); |
| 1127 | device_unlock(dev); |
| 1128 | |
| 1129 | return rc ? rc : len; |
| 1130 | } |
| 1131 | static DEVICE_ATTR_RW(sector_size); |
| 1132 | |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1133 | static ssize_t dpa_extents_show(struct device *dev, |
| 1134 | struct device_attribute *attr, char *buf) |
| 1135 | { |
| 1136 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 1137 | struct nd_label_id label_id; |
| 1138 | int count = 0, i; |
| 1139 | u8 *uuid = NULL; |
| 1140 | u32 flags = 0; |
| 1141 | |
| 1142 | nvdimm_bus_lock(dev); |
| 1143 | if (is_namespace_pmem(dev)) { |
| 1144 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1145 | |
| 1146 | uuid = nspm->uuid; |
| 1147 | flags = 0; |
| 1148 | } else if (is_namespace_blk(dev)) { |
| 1149 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 1150 | |
| 1151 | uuid = nsblk->uuid; |
| 1152 | flags = NSLABEL_FLAG_LOCAL; |
| 1153 | } |
| 1154 | |
| 1155 | if (!uuid) |
| 1156 | goto out; |
| 1157 | |
| 1158 | nd_label_gen_id(&label_id, uuid, flags); |
| 1159 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1160 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1161 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1162 | struct resource *res; |
| 1163 | |
| 1164 | for_each_dpa_resource(ndd, res) |
| 1165 | if (strcmp(res->name, label_id.id) == 0) |
| 1166 | count++; |
| 1167 | } |
| 1168 | out: |
| 1169 | nvdimm_bus_unlock(dev); |
| 1170 | |
| 1171 | return sprintf(buf, "%d\n", count); |
| 1172 | } |
| 1173 | static DEVICE_ATTR_RO(dpa_extents); |
| 1174 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1175 | static ssize_t holder_show(struct device *dev, |
| 1176 | struct device_attribute *attr, char *buf) |
| 1177 | { |
| 1178 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1179 | ssize_t rc; |
| 1180 | |
| 1181 | device_lock(dev); |
| 1182 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
| 1183 | device_unlock(dev); |
| 1184 | |
| 1185 | return rc; |
| 1186 | } |
| 1187 | static DEVICE_ATTR_RO(holder); |
| 1188 | |
| 1189 | static ssize_t force_raw_store(struct device *dev, |
| 1190 | struct device_attribute *attr, const char *buf, size_t len) |
| 1191 | { |
| 1192 | bool force_raw; |
| 1193 | int rc = strtobool(buf, &force_raw); |
| 1194 | |
| 1195 | if (rc) |
| 1196 | return rc; |
| 1197 | |
| 1198 | to_ndns(dev)->force_raw = force_raw; |
| 1199 | return len; |
| 1200 | } |
| 1201 | |
| 1202 | static ssize_t force_raw_show(struct device *dev, |
| 1203 | struct device_attribute *attr, char *buf) |
| 1204 | { |
| 1205 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); |
| 1206 | } |
| 1207 | static DEVICE_ATTR_RW(force_raw); |
| 1208 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1209 | static struct attribute *nd_namespace_attributes[] = { |
| 1210 | &dev_attr_nstype.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1211 | &dev_attr_size.attr, |
| 1212 | &dev_attr_uuid.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1213 | &dev_attr_holder.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1214 | &dev_attr_resource.attr, |
| 1215 | &dev_attr_alt_name.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1216 | &dev_attr_force_raw.attr, |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1217 | &dev_attr_sector_size.attr, |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1218 | &dev_attr_dpa_extents.attr, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1219 | NULL, |
| 1220 | }; |
| 1221 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1222 | static umode_t namespace_visible(struct kobject *kobj, |
| 1223 | struct attribute *a, int n) |
| 1224 | { |
| 1225 | struct device *dev = container_of(kobj, struct device, kobj); |
| 1226 | |
| 1227 | if (a == &dev_attr_resource.attr) { |
| 1228 | if (is_namespace_blk(dev)) |
| 1229 | return 0; |
| 1230 | return a->mode; |
| 1231 | } |
| 1232 | |
| 1233 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { |
| 1234 | if (a == &dev_attr_size.attr) |
| 1235 | return S_IWUSR | S_IRUGO; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1236 | |
| 1237 | if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr) |
| 1238 | return 0; |
| 1239 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1240 | return a->mode; |
| 1241 | } |
| 1242 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1243 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
| 1244 | || a == &dev_attr_holder.attr |
| 1245 | || a == &dev_attr_force_raw.attr) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1246 | return a->mode; |
| 1247 | |
| 1248 | return 0; |
| 1249 | } |
| 1250 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1251 | static struct attribute_group nd_namespace_attribute_group = { |
| 1252 | .attrs = nd_namespace_attributes, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1253 | .is_visible = namespace_visible, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1254 | }; |
| 1255 | |
| 1256 | static const struct attribute_group *nd_namespace_attribute_groups[] = { |
| 1257 | &nd_device_attribute_group, |
| 1258 | &nd_namespace_attribute_group, |
Toshi Kani | 74ae66c | 2015-06-19 12:18:34 -0600 | [diff] [blame] | 1259 | &nd_numa_attribute_group, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1260 | NULL, |
| 1261 | }; |
| 1262 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1263 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
| 1264 | { |
| 1265 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 1266 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1267 | struct nd_namespace_common *ndns; |
| 1268 | resource_size_t size; |
| 1269 | |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 1270 | if (nd_btt || nd_pfn) { |
| 1271 | struct device *host = NULL; |
| 1272 | |
| 1273 | if (nd_btt) { |
| 1274 | host = &nd_btt->dev; |
| 1275 | ndns = nd_btt->ndns; |
| 1276 | } else if (nd_pfn) { |
| 1277 | host = &nd_pfn->dev; |
| 1278 | ndns = nd_pfn->ndns; |
| 1279 | } |
| 1280 | |
| 1281 | if (!ndns || !host) |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1282 | return ERR_PTR(-ENODEV); |
| 1283 | |
| 1284 | /* |
| 1285 | * Flush any in-progess probes / removals in the driver |
| 1286 | * for the raw personality of this namespace. |
| 1287 | */ |
| 1288 | device_lock(&ndns->dev); |
| 1289 | device_unlock(&ndns->dev); |
| 1290 | if (ndns->dev.driver) { |
| 1291 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 1292 | dev_name(host)); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1293 | return ERR_PTR(-EBUSY); |
| 1294 | } |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 1295 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != host, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1296 | "host (%s) vs claim (%s) mismatch\n", |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame^] | 1297 | dev_name(host), |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1298 | dev_name(ndns->claim))) |
| 1299 | return ERR_PTR(-ENXIO); |
| 1300 | } else { |
| 1301 | ndns = to_ndns(dev); |
| 1302 | if (ndns->claim) { |
| 1303 | dev_dbg(dev, "claimed by %s, failing probe\n", |
| 1304 | dev_name(ndns->claim)); |
| 1305 | |
| 1306 | return ERR_PTR(-ENXIO); |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | size = nvdimm_namespace_capacity(ndns); |
| 1311 | if (size < ND_MIN_NAMESPACE_SIZE) { |
| 1312 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", |
| 1313 | &size, ND_MIN_NAMESPACE_SIZE); |
| 1314 | return ERR_PTR(-ENODEV); |
| 1315 | } |
| 1316 | |
| 1317 | if (is_namespace_pmem(&ndns->dev)) { |
| 1318 | struct nd_namespace_pmem *nspm; |
| 1319 | |
| 1320 | nspm = to_nd_namespace_pmem(&ndns->dev); |
| 1321 | if (!nspm->uuid) { |
| 1322 | dev_dbg(&ndns->dev, "%s: uuid not set\n", __func__); |
| 1323 | return ERR_PTR(-ENODEV); |
| 1324 | } |
| 1325 | } else if (is_namespace_blk(&ndns->dev)) { |
Ross Zwisler | 047fc8a | 2015-06-25 04:21:02 -0400 | [diff] [blame] | 1326 | struct nd_namespace_blk *nsblk; |
| 1327 | |
| 1328 | nsblk = to_nd_namespace_blk(&ndns->dev); |
| 1329 | if (!nd_namespace_blk_validate(nsblk)) |
| 1330 | return ERR_PTR(-ENODEV); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1331 | } |
| 1332 | |
| 1333 | return ndns; |
| 1334 | } |
| 1335 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); |
| 1336 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1337 | static struct device **create_namespace_io(struct nd_region *nd_region) |
| 1338 | { |
| 1339 | struct nd_namespace_io *nsio; |
| 1340 | struct device *dev, **devs; |
| 1341 | struct resource *res; |
| 1342 | |
| 1343 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); |
| 1344 | if (!nsio) |
| 1345 | return NULL; |
| 1346 | |
| 1347 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 1348 | if (!devs) { |
| 1349 | kfree(nsio); |
| 1350 | return NULL; |
| 1351 | } |
| 1352 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1353 | dev = &nsio->common.dev; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1354 | dev->type = &namespace_io_device_type; |
| 1355 | dev->parent = &nd_region->dev; |
| 1356 | res = &nsio->res; |
| 1357 | res->name = dev_name(&nd_region->dev); |
| 1358 | res->flags = IORESOURCE_MEM; |
| 1359 | res->start = nd_region->ndr_start; |
| 1360 | res->end = res->start + nd_region->ndr_size - 1; |
| 1361 | |
| 1362 | devs[0] = dev; |
| 1363 | return devs; |
| 1364 | } |
| 1365 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1366 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
| 1367 | u64 cookie, u16 pos) |
| 1368 | { |
| 1369 | struct nd_namespace_label *found = NULL; |
| 1370 | int i; |
| 1371 | |
| 1372 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1373 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1374 | struct nd_namespace_label *nd_label; |
| 1375 | bool found_uuid = false; |
| 1376 | int l; |
| 1377 | |
| 1378 | for_each_label(l, nd_label, nd_mapping->labels) { |
| 1379 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); |
| 1380 | u16 position = __le16_to_cpu(nd_label->position); |
| 1381 | u16 nlabel = __le16_to_cpu(nd_label->nlabel); |
| 1382 | |
| 1383 | if (isetcookie != cookie) |
| 1384 | continue; |
| 1385 | |
| 1386 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) |
| 1387 | continue; |
| 1388 | |
| 1389 | if (found_uuid) { |
| 1390 | dev_dbg(to_ndd(nd_mapping)->dev, |
| 1391 | "%s duplicate entry for uuid\n", |
| 1392 | __func__); |
| 1393 | return false; |
| 1394 | } |
| 1395 | found_uuid = true; |
| 1396 | if (nlabel != nd_region->ndr_mappings) |
| 1397 | continue; |
| 1398 | if (position != pos) |
| 1399 | continue; |
| 1400 | found = nd_label; |
| 1401 | break; |
| 1402 | } |
| 1403 | if (found) |
| 1404 | break; |
| 1405 | } |
| 1406 | return found != NULL; |
| 1407 | } |
| 1408 | |
| 1409 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) |
| 1410 | { |
| 1411 | struct nd_namespace_label *select = NULL; |
| 1412 | int i; |
| 1413 | |
| 1414 | if (!pmem_id) |
| 1415 | return -ENODEV; |
| 1416 | |
| 1417 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1418 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1419 | struct nd_namespace_label *nd_label; |
| 1420 | u64 hw_start, hw_end, pmem_start, pmem_end; |
| 1421 | int l; |
| 1422 | |
| 1423 | for_each_label(l, nd_label, nd_mapping->labels) |
| 1424 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
| 1425 | break; |
| 1426 | |
| 1427 | if (!nd_label) { |
| 1428 | WARN_ON(1); |
| 1429 | return -EINVAL; |
| 1430 | } |
| 1431 | |
| 1432 | select = nd_label; |
| 1433 | /* |
| 1434 | * Check that this label is compliant with the dpa |
| 1435 | * range published in NFIT |
| 1436 | */ |
| 1437 | hw_start = nd_mapping->start; |
| 1438 | hw_end = hw_start + nd_mapping->size; |
| 1439 | pmem_start = __le64_to_cpu(select->dpa); |
| 1440 | pmem_end = pmem_start + __le64_to_cpu(select->rawsize); |
| 1441 | if (pmem_start == hw_start && pmem_end <= hw_end) |
| 1442 | /* pass */; |
| 1443 | else |
| 1444 | return -EINVAL; |
| 1445 | |
| 1446 | nd_mapping->labels[0] = select; |
| 1447 | nd_mapping->labels[1] = NULL; |
| 1448 | } |
| 1449 | return 0; |
| 1450 | } |
| 1451 | |
| 1452 | /** |
| 1453 | * find_pmem_label_set - validate interleave set labelling, retrieve label0 |
| 1454 | * @nd_region: region with mappings to validate |
| 1455 | */ |
| 1456 | static int find_pmem_label_set(struct nd_region *nd_region, |
| 1457 | struct nd_namespace_pmem *nspm) |
| 1458 | { |
| 1459 | u64 cookie = nd_region_interleave_set_cookie(nd_region); |
| 1460 | struct nd_namespace_label *nd_label; |
| 1461 | u8 select_id[NSLABEL_UUID_LEN]; |
| 1462 | resource_size_t size = 0; |
| 1463 | u8 *pmem_id = NULL; |
| 1464 | int rc = -ENODEV, l; |
| 1465 | u16 i; |
| 1466 | |
| 1467 | if (cookie == 0) |
| 1468 | return -ENXIO; |
| 1469 | |
| 1470 | /* |
| 1471 | * Find a complete set of labels by uuid. By definition we can start |
| 1472 | * with any mapping as the reference label |
| 1473 | */ |
| 1474 | for_each_label(l, nd_label, nd_region->mapping[0].labels) { |
| 1475 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); |
| 1476 | |
| 1477 | if (isetcookie != cookie) |
| 1478 | continue; |
| 1479 | |
| 1480 | for (i = 0; nd_region->ndr_mappings; i++) |
| 1481 | if (!has_uuid_at_pos(nd_region, nd_label->uuid, |
| 1482 | cookie, i)) |
| 1483 | break; |
| 1484 | if (i < nd_region->ndr_mappings) { |
| 1485 | /* |
| 1486 | * Give up if we don't find an instance of a |
| 1487 | * uuid at each position (from 0 to |
| 1488 | * nd_region->ndr_mappings - 1), or if we find a |
| 1489 | * dimm with two instances of the same uuid. |
| 1490 | */ |
| 1491 | rc = -EINVAL; |
| 1492 | goto err; |
| 1493 | } else if (pmem_id) { |
| 1494 | /* |
| 1495 | * If there is more than one valid uuid set, we |
| 1496 | * need userspace to clean this up. |
| 1497 | */ |
| 1498 | rc = -EBUSY; |
| 1499 | goto err; |
| 1500 | } |
| 1501 | memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN); |
| 1502 | pmem_id = select_id; |
| 1503 | } |
| 1504 | |
| 1505 | /* |
| 1506 | * Fix up each mapping's 'labels' to have the validated pmem label for |
| 1507 | * that position at labels[0], and NULL at labels[1]. In the process, |
| 1508 | * check that the namespace aligns with interleave-set. We know |
| 1509 | * that it does not overlap with any blk namespaces by virtue of |
| 1510 | * the dimm being enabled (i.e. nd_label_reserve_dpa() |
| 1511 | * succeeded). |
| 1512 | */ |
| 1513 | rc = select_pmem_id(nd_region, pmem_id); |
| 1514 | if (rc) |
| 1515 | goto err; |
| 1516 | |
| 1517 | /* Calculate total size and populate namespace properties from label0 */ |
| 1518 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1519 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1520 | struct nd_namespace_label *label0 = nd_mapping->labels[0]; |
| 1521 | |
| 1522 | size += __le64_to_cpu(label0->rawsize); |
| 1523 | if (__le16_to_cpu(label0->position) != 0) |
| 1524 | continue; |
| 1525 | WARN_ON(nspm->alt_name || nspm->uuid); |
| 1526 | nspm->alt_name = kmemdup((void __force *) label0->name, |
| 1527 | NSLABEL_NAME_LEN, GFP_KERNEL); |
| 1528 | nspm->uuid = kmemdup((void __force *) label0->uuid, |
| 1529 | NSLABEL_UUID_LEN, GFP_KERNEL); |
| 1530 | } |
| 1531 | |
| 1532 | if (!nspm->alt_name || !nspm->uuid) { |
| 1533 | rc = -ENOMEM; |
| 1534 | goto err; |
| 1535 | } |
| 1536 | |
| 1537 | nd_namespace_pmem_set_size(nd_region, nspm, size); |
| 1538 | |
| 1539 | return 0; |
| 1540 | err: |
| 1541 | switch (rc) { |
| 1542 | case -EINVAL: |
| 1543 | dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__); |
| 1544 | break; |
| 1545 | case -ENODEV: |
| 1546 | dev_dbg(&nd_region->dev, "%s: label not found\n", __func__); |
| 1547 | break; |
| 1548 | default: |
| 1549 | dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n", |
| 1550 | __func__, rc); |
| 1551 | break; |
| 1552 | } |
| 1553 | return rc; |
| 1554 | } |
| 1555 | |
| 1556 | static struct device **create_namespace_pmem(struct nd_region *nd_region) |
| 1557 | { |
| 1558 | struct nd_namespace_pmem *nspm; |
| 1559 | struct device *dev, **devs; |
| 1560 | struct resource *res; |
| 1561 | int rc; |
| 1562 | |
| 1563 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
| 1564 | if (!nspm) |
| 1565 | return NULL; |
| 1566 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1567 | dev = &nspm->nsio.common.dev; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1568 | dev->type = &namespace_pmem_device_type; |
| 1569 | dev->parent = &nd_region->dev; |
| 1570 | res = &nspm->nsio.res; |
| 1571 | res->name = dev_name(&nd_region->dev); |
| 1572 | res->flags = IORESOURCE_MEM; |
| 1573 | rc = find_pmem_label_set(nd_region, nspm); |
| 1574 | if (rc == -ENODEV) { |
| 1575 | int i; |
| 1576 | |
| 1577 | /* Pass, try to permit namespace creation... */ |
| 1578 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1579 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1580 | |
| 1581 | kfree(nd_mapping->labels); |
| 1582 | nd_mapping->labels = NULL; |
| 1583 | } |
| 1584 | |
| 1585 | /* Publish a zero-sized namespace for userspace to configure. */ |
| 1586 | nd_namespace_pmem_set_size(nd_region, nspm, 0); |
| 1587 | |
| 1588 | rc = 0; |
| 1589 | } else if (rc) |
| 1590 | goto err; |
| 1591 | |
| 1592 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 1593 | if (!devs) |
| 1594 | goto err; |
| 1595 | |
| 1596 | devs[0] = dev; |
| 1597 | return devs; |
| 1598 | |
| 1599 | err: |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1600 | namespace_pmem_release(&nspm->nsio.common.dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1601 | return NULL; |
| 1602 | } |
| 1603 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1604 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
| 1605 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, |
| 1606 | resource_size_t start) |
| 1607 | { |
| 1608 | struct nd_label_id label_id; |
| 1609 | struct resource *res; |
| 1610 | |
| 1611 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
| 1612 | res = krealloc(nsblk->res, |
| 1613 | sizeof(void *) * (nsblk->num_resources + 1), |
| 1614 | GFP_KERNEL); |
| 1615 | if (!res) |
| 1616 | return NULL; |
| 1617 | nsblk->res = (struct resource **) res; |
| 1618 | for_each_dpa_resource(ndd, res) |
| 1619 | if (strcmp(res->name, label_id.id) == 0 |
| 1620 | && res->start == start) { |
| 1621 | nsblk->res[nsblk->num_resources++] = res; |
| 1622 | return res; |
| 1623 | } |
| 1624 | return NULL; |
| 1625 | } |
| 1626 | |
| 1627 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) |
| 1628 | { |
| 1629 | struct nd_namespace_blk *nsblk; |
| 1630 | struct device *dev; |
| 1631 | |
| 1632 | if (!is_nd_blk(&nd_region->dev)) |
| 1633 | return NULL; |
| 1634 | |
| 1635 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1636 | if (!nsblk) |
| 1637 | return NULL; |
| 1638 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1639 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1640 | dev->type = &namespace_blk_device_type; |
| 1641 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); |
| 1642 | if (nsblk->id < 0) { |
| 1643 | kfree(nsblk); |
| 1644 | return NULL; |
| 1645 | } |
| 1646 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); |
| 1647 | dev->parent = &nd_region->dev; |
| 1648 | dev->groups = nd_namespace_attribute_groups; |
| 1649 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1650 | return &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1651 | } |
| 1652 | |
| 1653 | void nd_region_create_blk_seed(struct nd_region *nd_region) |
| 1654 | { |
| 1655 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1656 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); |
| 1657 | /* |
| 1658 | * Seed creation failures are not fatal, provisioning is simply |
| 1659 | * disabled until memory becomes available |
| 1660 | */ |
| 1661 | if (!nd_region->ns_seed) |
| 1662 | dev_err(&nd_region->dev, "failed to create blk namespace\n"); |
| 1663 | else |
| 1664 | nd_device_register(nd_region->ns_seed); |
| 1665 | } |
| 1666 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1667 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
| 1668 | { |
| 1669 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1670 | nd_region->btt_seed = nd_btt_create(nd_region); |
| 1671 | /* |
| 1672 | * Seed creation failures are not fatal, provisioning is simply |
| 1673 | * disabled until memory becomes available |
| 1674 | */ |
| 1675 | if (!nd_region->btt_seed) |
| 1676 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); |
| 1677 | } |
| 1678 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1679 | static struct device **create_namespace_blk(struct nd_region *nd_region) |
| 1680 | { |
| 1681 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 1682 | struct nd_namespace_label *nd_label; |
| 1683 | struct device *dev, **devs = NULL; |
| 1684 | struct nd_namespace_blk *nsblk; |
| 1685 | struct nvdimm_drvdata *ndd; |
| 1686 | int i, l, count = 0; |
| 1687 | struct resource *res; |
| 1688 | |
| 1689 | if (nd_region->ndr_mappings == 0) |
| 1690 | return NULL; |
| 1691 | |
| 1692 | ndd = to_ndd(nd_mapping); |
| 1693 | for_each_label(l, nd_label, nd_mapping->labels) { |
| 1694 | u32 flags = __le32_to_cpu(nd_label->flags); |
| 1695 | char *name[NSLABEL_NAME_LEN]; |
| 1696 | struct device **__devs; |
| 1697 | |
| 1698 | if (flags & NSLABEL_FLAG_LOCAL) |
| 1699 | /* pass */; |
| 1700 | else |
| 1701 | continue; |
| 1702 | |
| 1703 | for (i = 0; i < count; i++) { |
| 1704 | nsblk = to_nd_namespace_blk(devs[i]); |
| 1705 | if (memcmp(nsblk->uuid, nd_label->uuid, |
| 1706 | NSLABEL_UUID_LEN) == 0) { |
| 1707 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
| 1708 | __le64_to_cpu(nd_label->dpa)); |
| 1709 | if (!res) |
| 1710 | goto err; |
| 1711 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1712 | dev_name(&nsblk->common.dev)); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1713 | break; |
| 1714 | } |
| 1715 | } |
| 1716 | if (i < count) |
| 1717 | continue; |
| 1718 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); |
| 1719 | if (!__devs) |
| 1720 | goto err; |
| 1721 | memcpy(__devs, devs, sizeof(dev) * count); |
| 1722 | kfree(devs); |
| 1723 | devs = __devs; |
| 1724 | |
| 1725 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1726 | if (!nsblk) |
| 1727 | goto err; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1728 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1729 | dev->type = &namespace_blk_device_type; |
| 1730 | dev->parent = &nd_region->dev; |
| 1731 | dev_set_name(dev, "namespace%d.%d", nd_region->id, count); |
| 1732 | devs[count++] = dev; |
| 1733 | nsblk->id = -1; |
| 1734 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); |
| 1735 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, |
| 1736 | GFP_KERNEL); |
| 1737 | if (!nsblk->uuid) |
| 1738 | goto err; |
| 1739 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); |
| 1740 | if (name[0]) |
| 1741 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, |
| 1742 | GFP_KERNEL); |
| 1743 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
| 1744 | __le64_to_cpu(nd_label->dpa)); |
| 1745 | if (!res) |
| 1746 | goto err; |
| 1747 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1748 | dev_name(&nsblk->common.dev)); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1749 | } |
| 1750 | |
| 1751 | dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n", |
| 1752 | __func__, count, count == 1 ? "" : "s"); |
| 1753 | |
| 1754 | if (count == 0) { |
| 1755 | /* Publish a zero-sized namespace for userspace to configure. */ |
| 1756 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1757 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1758 | |
| 1759 | kfree(nd_mapping->labels); |
| 1760 | nd_mapping->labels = NULL; |
| 1761 | } |
| 1762 | |
| 1763 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); |
| 1764 | if (!devs) |
| 1765 | goto err; |
| 1766 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1767 | if (!nsblk) |
| 1768 | goto err; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1769 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1770 | dev->type = &namespace_blk_device_type; |
| 1771 | dev->parent = &nd_region->dev; |
| 1772 | devs[count++] = dev; |
| 1773 | } |
| 1774 | |
| 1775 | return devs; |
| 1776 | |
| 1777 | err: |
| 1778 | for (i = 0; i < count; i++) { |
| 1779 | nsblk = to_nd_namespace_blk(devs[i]); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1780 | namespace_blk_release(&nsblk->common.dev); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1781 | } |
| 1782 | kfree(devs); |
| 1783 | return NULL; |
| 1784 | } |
| 1785 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1786 | static int init_active_labels(struct nd_region *nd_region) |
| 1787 | { |
| 1788 | int i; |
| 1789 | |
| 1790 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1791 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1792 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1793 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 1794 | int count, j; |
| 1795 | |
| 1796 | /* |
| 1797 | * If the dimm is disabled then prevent the region from |
| 1798 | * being activated if it aliases DPA. |
| 1799 | */ |
| 1800 | if (!ndd) { |
| 1801 | if ((nvdimm->flags & NDD_ALIASING) == 0) |
| 1802 | return 0; |
| 1803 | dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", |
| 1804 | dev_name(&nd_mapping->nvdimm->dev)); |
| 1805 | return -ENXIO; |
| 1806 | } |
| 1807 | nd_mapping->ndd = ndd; |
| 1808 | atomic_inc(&nvdimm->busy); |
| 1809 | get_ndd(ndd); |
| 1810 | |
| 1811 | count = nd_label_active_count(ndd); |
| 1812 | dev_dbg(ndd->dev, "%s: %d\n", __func__, count); |
| 1813 | if (!count) |
| 1814 | continue; |
| 1815 | nd_mapping->labels = kcalloc(count + 1, sizeof(void *), |
| 1816 | GFP_KERNEL); |
| 1817 | if (!nd_mapping->labels) |
| 1818 | return -ENOMEM; |
| 1819 | for (j = 0; j < count; j++) { |
| 1820 | struct nd_namespace_label *label; |
| 1821 | |
| 1822 | label = nd_label_active(ndd, j); |
| 1823 | nd_mapping->labels[j] = label; |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1830 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
| 1831 | { |
| 1832 | struct device **devs = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1833 | int i, rc = 0, type; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1834 | |
| 1835 | *err = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1836 | nvdimm_bus_lock(&nd_region->dev); |
| 1837 | rc = init_active_labels(nd_region); |
| 1838 | if (rc) { |
| 1839 | nvdimm_bus_unlock(&nd_region->dev); |
| 1840 | return rc; |
| 1841 | } |
| 1842 | |
| 1843 | type = nd_region_to_nstype(nd_region); |
| 1844 | switch (type) { |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1845 | case ND_DEVICE_NAMESPACE_IO: |
| 1846 | devs = create_namespace_io(nd_region); |
| 1847 | break; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1848 | case ND_DEVICE_NAMESPACE_PMEM: |
| 1849 | devs = create_namespace_pmem(nd_region); |
| 1850 | break; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1851 | case ND_DEVICE_NAMESPACE_BLK: |
| 1852 | devs = create_namespace_blk(nd_region); |
| 1853 | break; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1854 | default: |
| 1855 | break; |
| 1856 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1857 | nvdimm_bus_unlock(&nd_region->dev); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1858 | |
| 1859 | if (!devs) |
| 1860 | return -ENODEV; |
| 1861 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1862 | for (i = 0; devs[i]; i++) { |
| 1863 | struct device *dev = devs[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1864 | int id; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1865 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1866 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
| 1867 | struct nd_namespace_blk *nsblk; |
| 1868 | |
| 1869 | nsblk = to_nd_namespace_blk(dev); |
| 1870 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, |
| 1871 | GFP_KERNEL); |
| 1872 | nsblk->id = id; |
| 1873 | } else |
| 1874 | id = i; |
| 1875 | |
| 1876 | if (id < 0) |
| 1877 | break; |
| 1878 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1879 | dev->groups = nd_namespace_attribute_groups; |
| 1880 | nd_device_register(dev); |
| 1881 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1882 | if (i) |
| 1883 | nd_region->ns_seed = devs[0]; |
| 1884 | |
| 1885 | if (devs[i]) { |
| 1886 | int j; |
| 1887 | |
| 1888 | for (j = i; devs[j]; j++) { |
| 1889 | struct device *dev = devs[j]; |
| 1890 | |
| 1891 | device_initialize(dev); |
| 1892 | put_device(dev); |
| 1893 | } |
| 1894 | *err = j - i; |
| 1895 | /* |
| 1896 | * All of the namespaces we tried to register failed, so |
| 1897 | * fail region activation. |
| 1898 | */ |
| 1899 | if (*err == 0) |
| 1900 | rc = -ENODEV; |
| 1901 | } |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1902 | kfree(devs); |
| 1903 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1904 | if (rc == -ENODEV) |
| 1905 | return rc; |
| 1906 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1907 | return i; |
| 1908 | } |