Thomas Gleixner | 5b497af | 2019-05-29 07:18:09 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 4 | */ |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/device.h> |
Dan Williams | 6ff3e91 | 2016-10-05 14:04:15 -0700 | [diff] [blame] | 7 | #include <linux/sort.h> |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 8 | #include <linux/slab.h> |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 9 | #include <linux/list.h> |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 10 | #include <linux/nd.h> |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 11 | #include "nd-core.h" |
Dan Williams | ca6a4657 | 2017-01-13 20:36:58 -0800 | [diff] [blame] | 12 | #include "pmem.h" |
Dan Williams | 6acd7d5 | 2020-02-27 21:39:23 -0800 | [diff] [blame] | 13 | #include "pfn.h" |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 14 | #include "nd.h" |
| 15 | |
| 16 | static void namespace_io_release(struct device *dev) |
| 17 | { |
| 18 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 19 | |
| 20 | kfree(nsio); |
| 21 | } |
| 22 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 23 | static void namespace_pmem_release(struct device *dev) |
| 24 | { |
| 25 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 26 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 27 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 28 | if (nspm->id >= 0) |
| 29 | ida_simple_remove(&nd_region->ns_ida, nspm->id); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 30 | kfree(nspm->alt_name); |
| 31 | kfree(nspm->uuid); |
| 32 | kfree(nspm); |
| 33 | } |
| 34 | |
Dan Williams | 78c81cc | 2019-11-06 19:56:41 -0800 | [diff] [blame] | 35 | static bool is_namespace_pmem(const struct device *dev); |
Dan Williams | 78c81cc | 2019-11-06 19:56:41 -0800 | [diff] [blame] | 36 | static bool is_namespace_io(const struct device *dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 37 | |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 38 | static int is_uuid_busy(struct device *dev, void *data) |
| 39 | { |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 40 | uuid_t *uuid1 = data, *uuid2 = NULL; |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 41 | |
| 42 | if (is_namespace_pmem(dev)) { |
| 43 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 44 | |
| 45 | uuid2 = nspm->uuid; |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 46 | } else if (is_nd_btt(dev)) { |
| 47 | struct nd_btt *nd_btt = to_nd_btt(dev); |
| 48 | |
| 49 | uuid2 = nd_btt->uuid; |
| 50 | } else if (is_nd_pfn(dev)) { |
| 51 | struct nd_pfn *nd_pfn = to_nd_pfn(dev); |
| 52 | |
| 53 | uuid2 = nd_pfn->uuid; |
| 54 | } |
| 55 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 56 | if (uuid2 && uuid_equal(uuid1, uuid2)) |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 57 | return -EBUSY; |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static int is_namespace_uuid_busy(struct device *dev, void *data) |
| 63 | { |
Dan Williams | c9e582a | 2017-05-29 23:12:19 -0700 | [diff] [blame] | 64 | if (is_nd_region(dev)) |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 65 | return device_for_each_child(dev, data, is_uuid_busy); |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * nd_is_uuid_unique - verify that no other namespace has @uuid |
| 71 | * @dev: any device on a nvdimm_bus |
| 72 | * @uuid: uuid to check |
| 73 | */ |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 74 | bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid) |
Dan Williams | e07ecd7 | 2016-01-05 18:37:23 -0800 | [diff] [blame] | 75 | { |
| 76 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); |
| 77 | |
| 78 | if (!nvdimm_bus) |
| 79 | return false; |
| 80 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); |
| 81 | if (device_for_each_child(&nvdimm_bus->dev, uuid, |
| 82 | is_namespace_uuid_busy) != 0) |
| 83 | return false; |
| 84 | return true; |
| 85 | } |
| 86 | |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 87 | bool pmem_should_map_pages(struct device *dev) |
| 88 | { |
| 89 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | fa7d2e6 | 2019-01-24 17:33:06 -0800 | [diff] [blame] | 90 | struct nd_namespace_common *ndns = to_ndns(dev); |
Dan Williams | cfe30b8 | 2016-03-03 09:38:00 -0800 | [diff] [blame] | 91 | struct nd_namespace_io *nsio; |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 92 | |
| 93 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) |
| 94 | return false; |
| 95 | |
| 96 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) |
| 97 | return false; |
| 98 | |
| 99 | if (is_nd_pfn(dev) || is_nd_btt(dev)) |
| 100 | return false; |
| 101 | |
Dan Williams | fa7d2e6 | 2019-01-24 17:33:06 -0800 | [diff] [blame] | 102 | if (ndns->force_raw) |
| 103 | return false; |
| 104 | |
Dan Williams | cfe30b8 | 2016-03-03 09:38:00 -0800 | [diff] [blame] | 105 | nsio = to_nd_namespace_io(dev); |
| 106 | if (region_intersects(nsio->res.start, resource_size(&nsio->res), |
| 107 | IORESOURCE_SYSTEM_RAM, |
| 108 | IORES_DESC_NONE) == REGION_MIXED) |
| 109 | return false; |
| 110 | |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 111 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 112 | } |
| 113 | EXPORT_SYMBOL(pmem_should_map_pages); |
| 114 | |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 115 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns) |
| 116 | { |
| 117 | if (is_namespace_pmem(&ndns->dev)) { |
| 118 | struct nd_namespace_pmem *nspm; |
| 119 | |
| 120 | nspm = to_nd_namespace_pmem(&ndns->dev); |
| 121 | if (nspm->lbasize == 0 || nspm->lbasize == 512) |
| 122 | /* default */; |
| 123 | else if (nspm->lbasize == 4096) |
| 124 | return 4096; |
| 125 | else |
| 126 | dev_WARN(&ndns->dev, "unsupported sector size: %ld\n", |
| 127 | nspm->lbasize); |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * There is no namespace label (is_namespace_io()), or the label |
| 132 | * indicates the default sector size. |
| 133 | */ |
| 134 | return 512; |
| 135 | } |
| 136 | EXPORT_SYMBOL(pmem_sector_size); |
| 137 | |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 138 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
| 139 | char *name) |
| 140 | { |
| 141 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 142 | const char *suffix = NULL; |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 143 | |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 144 | if (ndns->claim && is_nd_btt(ndns->claim)) |
| 145 | suffix = "s"; |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 146 | |
Dan Williams | 004f1af | 2015-08-24 19:20:23 -0400 | [diff] [blame] | 147 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
Dan Williams | 0122073 | 2016-10-05 09:09:44 -0700 | [diff] [blame] | 148 | int nsidx = 0; |
| 149 | |
| 150 | if (is_namespace_pmem(&ndns->dev)) { |
| 151 | struct nd_namespace_pmem *nspm; |
| 152 | |
| 153 | nspm = to_nd_namespace_pmem(&ndns->dev); |
| 154 | nsidx = nspm->id; |
| 155 | } |
| 156 | |
| 157 | if (nsidx) |
| 158 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, |
| 159 | suffix ? suffix : ""); |
| 160 | else |
| 161 | sprintf(name, "pmem%d%s", nd_region->id, |
| 162 | suffix ? suffix : ""); |
Vishal Verma | 5212e11 | 2015-06-25 04:20:32 -0400 | [diff] [blame] | 163 | } else { |
| 164 | return NULL; |
| 165 | } |
| 166 | |
| 167 | return name; |
| 168 | } |
| 169 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); |
| 170 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 171 | const uuid_t *nd_dev_to_uuid(struct device *dev) |
Vishal Verma | 6ec6895 | 2015-07-29 14:58:09 -0600 | [diff] [blame] | 172 | { |
Andy Shevchenko | 36a40c3 | 2022-06-07 18:25:25 +0300 | [diff] [blame] | 173 | if (dev && is_namespace_pmem(dev)) { |
Vishal Verma | 6ec6895 | 2015-07-29 14:58:09 -0600 | [diff] [blame] | 174 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 175 | |
| 176 | return nspm->uuid; |
Andy Shevchenko | 36a40c3 | 2022-06-07 18:25:25 +0300 | [diff] [blame] | 177 | } |
| 178 | return &uuid_null; |
Vishal Verma | 6ec6895 | 2015-07-29 14:58:09 -0600 | [diff] [blame] | 179 | } |
| 180 | EXPORT_SYMBOL(nd_dev_to_uuid); |
| 181 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 182 | static ssize_t nstype_show(struct device *dev, |
| 183 | struct device_attribute *attr, char *buf) |
| 184 | { |
| 185 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 186 | |
| 187 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); |
| 188 | } |
| 189 | static DEVICE_ATTR_RO(nstype); |
| 190 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 191 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
| 192 | const size_t len) |
| 193 | { |
| 194 | char *input, *pos, *alt_name, **ns_altname; |
| 195 | ssize_t rc; |
| 196 | |
| 197 | if (is_namespace_pmem(dev)) { |
| 198 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 199 | |
| 200 | ns_altname = &nspm->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 201 | } else |
| 202 | return -ENXIO; |
| 203 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 204 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 205 | return -EBUSY; |
| 206 | |
Andy Shevchenko | 3d9cbe3 | 2018-06-11 16:47:21 +0300 | [diff] [blame] | 207 | input = kstrndup(buf, len, GFP_KERNEL); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 208 | if (!input) |
| 209 | return -ENOMEM; |
| 210 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 211 | pos = strim(input); |
| 212 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { |
| 213 | rc = -EINVAL; |
| 214 | goto out; |
| 215 | } |
| 216 | |
| 217 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); |
| 218 | if (!alt_name) { |
| 219 | rc = -ENOMEM; |
| 220 | goto out; |
| 221 | } |
| 222 | kfree(*ns_altname); |
| 223 | *ns_altname = alt_name; |
| 224 | sprintf(*ns_altname, "%s", pos); |
| 225 | rc = len; |
| 226 | |
| 227 | out: |
| 228 | kfree(input); |
| 229 | return rc; |
| 230 | } |
| 231 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 232 | static int nd_namespace_label_update(struct nd_region *nd_region, |
| 233 | struct device *dev) |
| 234 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 235 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 236 | "namespace must be idle during label update\n"); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 237 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 238 | return 0; |
| 239 | |
| 240 | /* |
| 241 | * Only allow label writes that will result in a valid namespace |
| 242 | * or deletion of an existing namespace. |
| 243 | */ |
| 244 | if (is_namespace_pmem(dev)) { |
| 245 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 246 | resource_size_t size = resource_size(&nspm->nsio.res); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 247 | |
| 248 | if (size == 0 && nspm->uuid) |
| 249 | /* delete allocation */; |
| 250 | else if (!nspm->uuid) |
| 251 | return 0; |
| 252 | |
| 253 | return nd_pmem_namespace_label_update(nd_region, nspm, size); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 254 | } else |
| 255 | return -ENXIO; |
| 256 | } |
| 257 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 258 | static ssize_t alt_name_store(struct device *dev, |
| 259 | struct device_attribute *attr, const char *buf, size_t len) |
| 260 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 261 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 262 | ssize_t rc; |
| 263 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 264 | device_lock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 265 | nvdimm_bus_lock(dev); |
| 266 | wait_nvdimm_bus_probe_idle(dev); |
| 267 | rc = __alt_name_store(dev, buf, len); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 268 | if (rc >= 0) |
| 269 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 270 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 271 | nvdimm_bus_unlock(dev); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 272 | device_unlock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 273 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 274 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static ssize_t alt_name_show(struct device *dev, |
| 278 | struct device_attribute *attr, char *buf) |
| 279 | { |
| 280 | char *ns_altname; |
| 281 | |
| 282 | if (is_namespace_pmem(dev)) { |
| 283 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 284 | |
| 285 | ns_altname = nspm->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 286 | } else |
| 287 | return -ENXIO; |
| 288 | |
| 289 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); |
| 290 | } |
| 291 | static DEVICE_ATTR_RW(alt_name); |
| 292 | |
| 293 | static int scan_free(struct nd_region *nd_region, |
| 294 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 295 | resource_size_t n) |
| 296 | { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 297 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 298 | int rc = 0; |
| 299 | |
| 300 | while (n) { |
| 301 | struct resource *res, *last; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 302 | |
| 303 | last = NULL; |
| 304 | for_each_dpa_resource(ndd, res) |
| 305 | if (strcmp(res->name, label_id->id) == 0) |
| 306 | last = res; |
| 307 | res = last; |
| 308 | if (!res) |
| 309 | return 0; |
| 310 | |
| 311 | if (n >= resource_size(res)) { |
| 312 | n -= resource_size(res); |
| 313 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); |
| 314 | nvdimm_free_dpa(ndd, res); |
| 315 | /* retry with last resource deleted */ |
| 316 | continue; |
| 317 | } |
| 318 | |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 319 | rc = adjust_resource(res, res->start, resource_size(res) - n); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 320 | if (rc == 0) |
| 321 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 322 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | return rc; |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id |
| 331 | * @nd_region: the set of dimms to reclaim @n bytes from |
| 332 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 333 | * @n: number of bytes per-dimm to release |
| 334 | * |
| 335 | * Assumes resources are ordered. Starting from the end try to |
| 336 | * adjust_resource() the allocation to @n, but if @n is larger than the |
| 337 | * allocation delete it and find the 'new' last allocation in the label |
| 338 | * set. |
| 339 | */ |
| 340 | static int shrink_dpa_allocation(struct nd_region *nd_region, |
| 341 | struct nd_label_id *label_id, resource_size_t n) |
| 342 | { |
| 343 | int i; |
| 344 | |
| 345 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 346 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 347 | int rc; |
| 348 | |
| 349 | rc = scan_free(nd_region, nd_mapping, label_id, n); |
| 350 | if (rc) |
| 351 | return rc; |
| 352 | } |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, |
| 358 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, |
| 359 | resource_size_t n) |
| 360 | { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 361 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 362 | struct resource *res; |
| 363 | int rc = 0; |
| 364 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 365 | /* first resource allocation for this label-id or dimm */ |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 366 | res = nvdimm_allocate_dpa(ndd, label_id, nd_mapping->start, n); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 367 | if (!res) |
| 368 | rc = -EBUSY; |
| 369 | |
| 370 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); |
| 371 | return rc ? n : 0; |
| 372 | } |
| 373 | |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 374 | |
| 375 | /** |
| 376 | * space_valid() - validate free dpa space against constraints |
| 377 | * @nd_region: hosting region of the free space |
| 378 | * @ndd: dimm device data for debug |
| 379 | * @label_id: namespace id to allocate space |
| 380 | * @prev: potential allocation that precedes free space |
| 381 | * @next: allocation that follows the given free space range |
| 382 | * @exist: first allocation with same id in the mapping |
| 383 | * @n: range that must satisfied for pmem allocations |
| 384 | * @valid: free space range to validate |
| 385 | * |
| 386 | * BLK-space is valid as long as it does not precede a PMEM |
| 387 | * allocation in a given region. PMEM-space must be contiguous |
Jason Wang | 23a2d0c | 2022-08-03 04:19:18 +0800 | [diff] [blame] | 388 | * and adjacent to an existing allocation (if one |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 389 | * exists). If reserving PMEM any space is valid. |
| 390 | */ |
| 391 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, |
| 392 | struct nd_label_id *label_id, struct resource *prev, |
| 393 | struct resource *next, struct resource *exist, |
| 394 | resource_size_t n, struct resource *valid) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 395 | { |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 396 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
Dan Williams | 2522afb | 2020-01-30 12:06:23 -0800 | [diff] [blame] | 397 | unsigned long align; |
| 398 | |
| 399 | align = nd_region->align / nd_region->ndr_mappings; |
| 400 | valid->start = ALIGN(valid->start, align); |
| 401 | valid->end = ALIGN_DOWN(valid->end + 1, align) - 1; |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 402 | |
| 403 | if (valid->start >= valid->end) |
| 404 | goto invalid; |
| 405 | |
| 406 | if (is_reserve) |
| 407 | return; |
| 408 | |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 409 | /* allocation needs to be contiguous, so this is all or nothing */ |
| 410 | if (resource_size(valid) < n) |
| 411 | goto invalid; |
| 412 | |
| 413 | /* we've got all the space we need and no existing allocation */ |
| 414 | if (!exist) |
| 415 | return; |
| 416 | |
| 417 | /* allocation needs to be contiguous with the existing namespace */ |
| 418 | if (valid->start == exist->end + 1 |
| 419 | || valid->end == exist->start - 1) |
| 420 | return; |
| 421 | |
| 422 | invalid: |
| 423 | /* truncate @valid size to 0 */ |
| 424 | valid->end = valid->start - 1; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | enum alloc_loc { |
| 428 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, |
| 429 | }; |
| 430 | |
| 431 | static resource_size_t scan_allocate(struct nd_region *nd_region, |
| 432 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 433 | resource_size_t n) |
| 434 | { |
| 435 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 436 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 437 | struct resource *res, *exist = NULL, valid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 438 | const resource_size_t to_allocate = n; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 439 | int first; |
| 440 | |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 441 | for_each_dpa_resource(ndd, res) |
| 442 | if (strcmp(label_id->id, res->name) == 0) |
| 443 | exist = res; |
| 444 | |
| 445 | valid.start = nd_mapping->start; |
| 446 | valid.end = mapping_end; |
| 447 | valid.name = "free space"; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 448 | retry: |
| 449 | first = 0; |
| 450 | for_each_dpa_resource(ndd, res) { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 451 | struct resource *next = res->sibling, *new_res = NULL; |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 452 | resource_size_t allocate, available = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 453 | enum alloc_loc loc = ALLOC_ERR; |
| 454 | const char *action; |
| 455 | int rc = 0; |
| 456 | |
| 457 | /* ignore resources outside this nd_mapping */ |
| 458 | if (res->start > mapping_end) |
| 459 | continue; |
| 460 | if (res->end < nd_mapping->start) |
| 461 | continue; |
| 462 | |
| 463 | /* space at the beginning of the mapping */ |
| 464 | if (!first++ && res->start > nd_mapping->start) { |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 465 | valid.start = nd_mapping->start; |
| 466 | valid.end = res->start - 1; |
| 467 | space_valid(nd_region, ndd, label_id, NULL, next, exist, |
| 468 | to_allocate, &valid); |
| 469 | available = resource_size(&valid); |
| 470 | if (available) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 471 | loc = ALLOC_BEFORE; |
| 472 | } |
| 473 | |
| 474 | /* space between allocations */ |
| 475 | if (!loc && next) { |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 476 | valid.start = res->start + resource_size(res); |
| 477 | valid.end = min(mapping_end, next->start - 1); |
| 478 | space_valid(nd_region, ndd, label_id, res, next, exist, |
| 479 | to_allocate, &valid); |
| 480 | available = resource_size(&valid); |
| 481 | if (available) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 482 | loc = ALLOC_MID; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | /* space at the end of the mapping */ |
| 486 | if (!loc && !next) { |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 487 | valid.start = res->start + resource_size(res); |
| 488 | valid.end = mapping_end; |
| 489 | space_valid(nd_region, ndd, label_id, res, next, exist, |
| 490 | to_allocate, &valid); |
| 491 | available = resource_size(&valid); |
| 492 | if (available) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 493 | loc = ALLOC_AFTER; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | if (!loc || !available) |
| 497 | continue; |
| 498 | allocate = min(available, n); |
| 499 | switch (loc) { |
| 500 | case ALLOC_BEFORE: |
| 501 | if (strcmp(res->name, label_id->id) == 0) { |
| 502 | /* adjust current resource up */ |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 503 | rc = adjust_resource(res, res->start - allocate, |
| 504 | resource_size(res) + allocate); |
| 505 | action = "cur grow up"; |
| 506 | } else |
| 507 | action = "allocate"; |
| 508 | break; |
| 509 | case ALLOC_MID: |
| 510 | if (strcmp(next->name, label_id->id) == 0) { |
| 511 | /* adjust next resource up */ |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 512 | rc = adjust_resource(next, next->start |
| 513 | - allocate, resource_size(next) |
| 514 | + allocate); |
| 515 | new_res = next; |
| 516 | action = "next grow up"; |
| 517 | } else if (strcmp(res->name, label_id->id) == 0) { |
| 518 | action = "grow down"; |
| 519 | } else |
| 520 | action = "allocate"; |
| 521 | break; |
| 522 | case ALLOC_AFTER: |
| 523 | if (strcmp(res->name, label_id->id) == 0) |
| 524 | action = "grow down"; |
| 525 | else |
| 526 | action = "allocate"; |
| 527 | break; |
| 528 | default: |
| 529 | return n; |
| 530 | } |
| 531 | |
| 532 | if (strcmp(action, "allocate") == 0) { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 533 | new_res = nvdimm_allocate_dpa(ndd, label_id, |
Dan Williams | 762d067 | 2016-10-04 16:09:59 -0700 | [diff] [blame] | 534 | valid.start, allocate); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 535 | if (!new_res) |
| 536 | rc = -EBUSY; |
| 537 | } else if (strcmp(action, "grow down") == 0) { |
| 538 | /* adjust current resource down */ |
| 539 | rc = adjust_resource(res, res->start, resource_size(res) |
| 540 | + allocate); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 541 | if (rc == 0) |
| 542 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | if (!new_res) |
| 546 | new_res = res; |
| 547 | |
| 548 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", |
| 549 | action, loc, rc); |
| 550 | |
| 551 | if (rc) |
| 552 | return n; |
| 553 | |
| 554 | n -= allocate; |
| 555 | if (n) { |
| 556 | /* |
| 557 | * Retry scan with newly inserted resources. |
| 558 | * For example, if we did an ALLOC_BEFORE |
| 559 | * insertion there may also have been space |
| 560 | * available for an ALLOC_AFTER insertion, so we |
| 561 | * need to check this same resource again |
| 562 | */ |
| 563 | goto retry; |
| 564 | } else |
| 565 | return 0; |
| 566 | } |
| 567 | |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 568 | if (n == to_allocate) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 569 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
| 570 | return n; |
| 571 | } |
| 572 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 573 | static int merge_dpa(struct nd_region *nd_region, |
| 574 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) |
| 575 | { |
| 576 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 577 | struct resource *res; |
| 578 | |
| 579 | if (strncmp("pmem", label_id->id, 4) == 0) |
| 580 | return 0; |
| 581 | retry: |
| 582 | for_each_dpa_resource(ndd, res) { |
| 583 | int rc; |
| 584 | struct resource *next = res->sibling; |
| 585 | resource_size_t end = res->start + resource_size(res); |
| 586 | |
| 587 | if (!next || strcmp(res->name, label_id->id) != 0 |
| 588 | || strcmp(next->name, label_id->id) != 0 |
| 589 | || end != next->start) |
| 590 | continue; |
| 591 | end += resource_size(next); |
| 592 | nvdimm_free_dpa(ndd, next); |
| 593 | rc = adjust_resource(res, res->start, end - res->start); |
| 594 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); |
| 595 | if (rc) |
| 596 | return rc; |
| 597 | res->flags |= DPA_RESOURCE_ADJUSTED; |
| 598 | goto retry; |
| 599 | } |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
Keith Busch | 12e3129 | 2018-07-24 15:07:57 -0600 | [diff] [blame] | 604 | int __reserve_free_pmem(struct device *dev, void *data) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 605 | { |
| 606 | struct nvdimm *nvdimm = data; |
| 607 | struct nd_region *nd_region; |
| 608 | struct nd_label_id label_id; |
| 609 | int i; |
| 610 | |
Dan Williams | c9e582a | 2017-05-29 23:12:19 -0700 | [diff] [blame] | 611 | if (!is_memory(dev)) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 612 | return 0; |
| 613 | |
| 614 | nd_region = to_nd_region(dev); |
| 615 | if (nd_region->ndr_mappings == 0) |
| 616 | return 0; |
| 617 | |
| 618 | memset(&label_id, 0, sizeof(label_id)); |
| 619 | strcat(label_id.id, "pmem-reserve"); |
| 620 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 621 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 622 | resource_size_t n, rem = 0; |
| 623 | |
| 624 | if (nd_mapping->nvdimm != nvdimm) |
| 625 | continue; |
| 626 | |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 627 | n = nd_pmem_available_dpa(nd_region, nd_mapping); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 628 | if (n == 0) |
| 629 | return 0; |
| 630 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); |
| 631 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 632 | "pmem reserve underrun: %#llx of %#llx bytes\n", |
| 633 | (unsigned long long) n - rem, |
| 634 | (unsigned long long) n); |
| 635 | return rem ? -ENXIO : 0; |
| 636 | } |
| 637 | |
| 638 | return 0; |
| 639 | } |
| 640 | |
Keith Busch | 12e3129 | 2018-07-24 15:07:57 -0600 | [diff] [blame] | 641 | void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 642 | struct nd_mapping *nd_mapping) |
| 643 | { |
| 644 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 645 | struct resource *res, *_res; |
| 646 | |
| 647 | for_each_dpa_resource_safe(ndd, res, _res) |
| 648 | if (strcmp(res->name, "pmem-reserve") == 0) |
| 649 | nvdimm_free_dpa(ndd, res); |
| 650 | } |
| 651 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 652 | /** |
| 653 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id |
| 654 | * @nd_region: the set of dimms to allocate @n more bytes from |
| 655 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 656 | * @n: number of bytes per-dimm to add to the existing allocation |
| 657 | * |
| 658 | * Assumes resources are ordered. For BLK regions, first consume |
| 659 | * BLK-only available DPA free space, then consume PMEM-aliased DPA |
| 660 | * space starting at the highest DPA. For PMEM regions start |
| 661 | * allocations from the start of an interleave set and end at the first |
| 662 | * BLK allocation or the end of the interleave set, whichever comes |
| 663 | * first. |
| 664 | */ |
| 665 | static int grow_dpa_allocation(struct nd_region *nd_region, |
| 666 | struct nd_label_id *label_id, resource_size_t n) |
| 667 | { |
| 668 | int i; |
| 669 | |
| 670 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 671 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 672 | resource_size_t rem = n; |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 673 | int rc; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 674 | |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 675 | rem = scan_allocate(nd_region, nd_mapping, label_id, rem); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 676 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 677 | "allocation underrun: %#llx of %#llx bytes\n", |
| 678 | (unsigned long long) n - rem, |
| 679 | (unsigned long long) n); |
| 680 | if (rem) |
| 681 | return -ENXIO; |
| 682 | |
| 683 | rc = merge_dpa(nd_region, nd_mapping, label_id); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 684 | if (rc) |
| 685 | return rc; |
| 686 | } |
| 687 | |
| 688 | return 0; |
| 689 | } |
| 690 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 691 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 692 | struct nd_namespace_pmem *nspm, resource_size_t size) |
| 693 | { |
| 694 | struct resource *res = &nspm->nsio.res; |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 695 | resource_size_t offset = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 696 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 697 | if (size && !nspm->uuid) { |
| 698 | WARN_ON_ONCE(1); |
| 699 | size = 0; |
| 700 | } |
| 701 | |
| 702 | if (size && nspm->uuid) { |
| 703 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 704 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 705 | struct nd_label_id label_id; |
| 706 | struct resource *res; |
| 707 | |
| 708 | if (!ndd) { |
| 709 | size = 0; |
| 710 | goto out; |
| 711 | } |
| 712 | |
| 713 | nd_label_gen_id(&label_id, nspm->uuid, 0); |
| 714 | |
| 715 | /* calculate a spa offset from the dpa allocation offset */ |
| 716 | for_each_dpa_resource(ndd, res) |
| 717 | if (strcmp(res->name, label_id.id) == 0) { |
| 718 | offset = (res->start - nd_mapping->start) |
| 719 | * nd_region->ndr_mappings; |
| 720 | goto out; |
| 721 | } |
| 722 | |
| 723 | WARN_ON_ONCE(1); |
| 724 | size = 0; |
| 725 | } |
| 726 | |
| 727 | out: |
| 728 | res->start = nd_region->ndr_start + offset; |
| 729 | res->end = res->start + size - 1; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 730 | } |
| 731 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 732 | static bool uuid_not_set(const uuid_t *uuid, struct device *dev, |
| 733 | const char *where) |
Dmitry Krivenok | bd26d0d | 2015-12-02 00:48:12 +0300 | [diff] [blame] | 734 | { |
| 735 | if (!uuid) { |
| 736 | dev_dbg(dev, "%s: uuid not set\n", where); |
| 737 | return true; |
| 738 | } |
| 739 | return false; |
| 740 | } |
| 741 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 742 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
| 743 | { |
| 744 | resource_size_t allocated = 0, available = 0; |
| 745 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | 1f19b98 | 2017-01-09 17:30:49 -0800 | [diff] [blame] | 746 | struct nd_namespace_common *ndns = to_ndns(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 747 | struct nd_mapping *nd_mapping; |
| 748 | struct nvdimm_drvdata *ndd; |
| 749 | struct nd_label_id label_id; |
| 750 | u32 flags = 0, remainder; |
Dan Williams | 9d032f4 | 2017-01-25 00:54:07 +0530 | [diff] [blame] | 751 | int rc, i, id = -1; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 752 | uuid_t *uuid = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 753 | |
Dan Williams | 1f19b98 | 2017-01-09 17:30:49 -0800 | [diff] [blame] | 754 | if (dev->driver || ndns->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 755 | return -EBUSY; |
| 756 | |
| 757 | if (is_namespace_pmem(dev)) { |
| 758 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 759 | |
| 760 | uuid = nspm->uuid; |
Dan Williams | 9d032f4 | 2017-01-25 00:54:07 +0530 | [diff] [blame] | 761 | id = nspm->id; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | /* |
| 765 | * We need a uuid for the allocation-label and dimm(s) on which |
| 766 | * to store the label. |
| 767 | */ |
Dmitry Krivenok | bd26d0d | 2015-12-02 00:48:12 +0300 | [diff] [blame] | 768 | if (uuid_not_set(uuid, dev, __func__)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 769 | return -ENXIO; |
Dmitry Krivenok | bd26d0d | 2015-12-02 00:48:12 +0300 | [diff] [blame] | 770 | if (nd_region->ndr_mappings == 0) { |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 771 | dev_dbg(dev, "not associated with dimm(s)\n"); |
Dmitry Krivenok | bd26d0d | 2015-12-02 00:48:12 +0300 | [diff] [blame] | 772 | return -ENXIO; |
| 773 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 774 | |
Dan Williams | 2522afb | 2020-01-30 12:06:23 -0800 | [diff] [blame] | 775 | div_u64_rem(val, nd_region->align, &remainder); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 776 | if (remainder) { |
Aneesh Kumar K.V | 5b26db9 | 2019-09-05 21:16:02 +0530 | [diff] [blame] | 777 | dev_dbg(dev, "%llu is not %ldK aligned\n", val, |
Dan Williams | 2522afb | 2020-01-30 12:06:23 -0800 | [diff] [blame] | 778 | nd_region->align / SZ_1K); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 779 | return -EINVAL; |
| 780 | } |
| 781 | |
| 782 | nd_label_gen_id(&label_id, uuid, flags); |
| 783 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 784 | nd_mapping = &nd_region->mapping[i]; |
| 785 | ndd = to_ndd(nd_mapping); |
| 786 | |
| 787 | /* |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 788 | * All dimms in an interleave set, need to be enabled |
| 789 | * for the size to be changed. |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 790 | */ |
| 791 | if (!ndd) |
| 792 | return -ENXIO; |
| 793 | |
| 794 | allocated += nvdimm_allocated_dpa(ndd, &label_id); |
| 795 | } |
Keith Busch | 12e3129 | 2018-07-24 15:07:57 -0600 | [diff] [blame] | 796 | available = nd_region_allocatable_dpa(nd_region); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 797 | |
| 798 | if (val > available + allocated) |
| 799 | return -ENOSPC; |
| 800 | |
| 801 | if (val == allocated) |
| 802 | return 0; |
| 803 | |
| 804 | val = div_u64(val, nd_region->ndr_mappings); |
| 805 | allocated = div_u64(allocated, nd_region->ndr_mappings); |
| 806 | if (val < allocated) |
| 807 | rc = shrink_dpa_allocation(nd_region, &label_id, |
| 808 | allocated - val); |
| 809 | else |
| 810 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); |
| 811 | |
| 812 | if (rc) |
| 813 | return rc; |
| 814 | |
| 815 | if (is_namespace_pmem(dev)) { |
| 816 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 817 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 818 | nd_namespace_pmem_set_resource(nd_region, nspm, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 819 | val * nd_region->ndr_mappings); |
| 820 | } |
| 821 | |
Dan Williams | 1f19b98 | 2017-01-09 17:30:49 -0800 | [diff] [blame] | 822 | /* |
| 823 | * Try to delete the namespace if we deleted all of its |
Dan Williams | 9d032f4 | 2017-01-25 00:54:07 +0530 | [diff] [blame] | 824 | * allocation, this is not the seed or 0th device for the |
| 825 | * region, and it is not actively claimed by a btt, pfn, or dax |
| 826 | * instance. |
Dan Williams | 1f19b98 | 2017-01-09 17:30:49 -0800 | [diff] [blame] | 827 | */ |
Dan Williams | 9d032f4 | 2017-01-25 00:54:07 +0530 | [diff] [blame] | 828 | if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
Dan Williams | 1f19b98 | 2017-01-09 17:30:49 -0800 | [diff] [blame] | 829 | nd_device_unregister(dev, ND_ASYNC); |
| 830 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 831 | return rc; |
| 832 | } |
| 833 | |
| 834 | static ssize_t size_store(struct device *dev, |
| 835 | struct device_attribute *attr, const char *buf, size_t len) |
| 836 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 837 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 838 | unsigned long long val; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 839 | int rc; |
| 840 | |
| 841 | rc = kstrtoull(buf, 0, &val); |
| 842 | if (rc) |
| 843 | return rc; |
| 844 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 845 | device_lock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 846 | nvdimm_bus_lock(dev); |
| 847 | wait_nvdimm_bus_probe_idle(dev); |
| 848 | rc = __size_store(dev, val); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 849 | if (rc >= 0) |
| 850 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 851 | |
Andy Shevchenko | 53fc595 | 2022-06-07 18:37:50 +0300 | [diff] [blame] | 852 | /* setting size zero == 'delete namespace' */ |
| 853 | if (rc == 0 && val == 0 && is_namespace_pmem(dev)) { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 854 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 855 | |
Andy Shevchenko | 53fc595 | 2022-06-07 18:37:50 +0300 | [diff] [blame] | 856 | kfree(nspm->uuid); |
| 857 | nspm->uuid = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 858 | } |
| 859 | |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 860 | dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 861 | |
| 862 | nvdimm_bus_unlock(dev); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 863 | device_unlock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 864 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 865 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 866 | } |
| 867 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 868 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 869 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 870 | struct device *dev = &ndns->dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 871 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 872 | if (is_namespace_pmem(dev)) { |
| 873 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 874 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 875 | return resource_size(&nspm->nsio.res); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 876 | } else if (is_namespace_io(dev)) { |
| 877 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 878 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 879 | return resource_size(&nsio->res); |
| 880 | } else |
| 881 | WARN_ONCE(1, "unknown namespace type\n"); |
| 882 | return 0; |
| 883 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 884 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 885 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
| 886 | { |
| 887 | resource_size_t size; |
| 888 | |
| 889 | nvdimm_bus_lock(&ndns->dev); |
| 890 | size = __nvdimm_namespace_capacity(ndns); |
| 891 | nvdimm_bus_unlock(&ndns->dev); |
| 892 | |
| 893 | return size; |
| 894 | } |
| 895 | EXPORT_SYMBOL(nvdimm_namespace_capacity); |
| 896 | |
Dan Williams | 08e6b3c | 2018-06-13 09:08:36 -0700 | [diff] [blame] | 897 | bool nvdimm_namespace_locked(struct nd_namespace_common *ndns) |
| 898 | { |
| 899 | int i; |
| 900 | bool locked = false; |
| 901 | struct device *dev = &ndns->dev; |
| 902 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 903 | |
| 904 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 905 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 906 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 907 | |
| 908 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) { |
| 909 | dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm)); |
| 910 | locked = true; |
| 911 | } |
| 912 | } |
| 913 | return locked; |
| 914 | } |
| 915 | EXPORT_SYMBOL(nvdimm_namespace_locked); |
| 916 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 917 | static ssize_t size_show(struct device *dev, |
| 918 | struct device_attribute *attr, char *buf) |
| 919 | { |
| 920 | return sprintf(buf, "%llu\n", (unsigned long long) |
| 921 | nvdimm_namespace_capacity(to_ndns(dev))); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 922 | } |
Fabian Frederick | b44fe76 | 2016-12-04 10:54:08 -0800 | [diff] [blame] | 923 | static DEVICE_ATTR(size, 0444, size_show, size_store); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 924 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 925 | static uuid_t *namespace_to_uuid(struct device *dev) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 926 | { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 927 | if (is_namespace_pmem(dev)) { |
| 928 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 929 | |
Dan Williams | f95b4bc | 2016-09-21 18:16:21 -0700 | [diff] [blame] | 930 | return nspm->uuid; |
Dan Williams | fadc38a | 2022-03-09 19:49:32 -0800 | [diff] [blame] | 931 | } |
| 932 | return ERR_PTR(-ENXIO); |
Dan Williams | f95b4bc | 2016-09-21 18:16:21 -0700 | [diff] [blame] | 933 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 934 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 935 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
| 936 | char *buf) |
Dan Williams | f95b4bc | 2016-09-21 18:16:21 -0700 | [diff] [blame] | 937 | { |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 938 | uuid_t *uuid = namespace_to_uuid(dev); |
Dan Williams | f95b4bc | 2016-09-21 18:16:21 -0700 | [diff] [blame] | 939 | |
| 940 | if (IS_ERR(uuid)) |
| 941 | return PTR_ERR(uuid); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 942 | if (uuid) |
| 943 | return sprintf(buf, "%pUb\n", uuid); |
| 944 | return sprintf(buf, "\n"); |
| 945 | } |
| 946 | |
| 947 | /** |
| 948 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" |
| 949 | * @nd_region: parent region so we can updates all dimms in the set |
| 950 | * @dev: namespace type for generating label_id |
| 951 | * @new_uuid: incoming uuid |
| 952 | * @old_uuid: reference to the uuid storage location in the namespace object |
| 953 | */ |
| 954 | static int namespace_update_uuid(struct nd_region *nd_region, |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 955 | struct device *dev, uuid_t *new_uuid, |
| 956 | uuid_t **old_uuid) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 957 | { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 958 | struct nd_label_id old_label_id; |
| 959 | struct nd_label_id new_label_id; |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 960 | int i; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 961 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 962 | if (!nd_is_uuid_unique(dev, new_uuid)) |
| 963 | return -EINVAL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 964 | |
| 965 | if (*old_uuid == NULL) |
| 966 | goto out; |
| 967 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 968 | /* |
| 969 | * If we've already written a label with this uuid, then it's |
| 970 | * too late to rename because we can't reliably update the uuid |
| 971 | * without losing the old namespace. Userspace must delete this |
| 972 | * namespace to abandon the old uuid. |
| 973 | */ |
| 974 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 975 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 976 | |
| 977 | /* |
| 978 | * This check by itself is sufficient because old_uuid |
| 979 | * would be NULL above if this uuid did not exist in the |
| 980 | * currently written set. |
| 981 | * |
| 982 | * FIXME: can we delete uuid with zero dpa allocated? |
| 983 | */ |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 984 | if (list_empty(&nd_mapping->labels)) |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 985 | return -EBUSY; |
| 986 | } |
| 987 | |
Dan Williams | fadc38a | 2022-03-09 19:49:32 -0800 | [diff] [blame] | 988 | nd_label_gen_id(&old_label_id, *old_uuid, 0); |
| 989 | nd_label_gen_id(&new_label_id, new_uuid, 0); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 990 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 991 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 992 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | c4703ce | 2019-04-30 21:51:21 -0700 | [diff] [blame] | 993 | struct nd_label_ent *label_ent; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 994 | struct resource *res; |
| 995 | |
| 996 | for_each_dpa_resource(ndd, res) |
| 997 | if (strcmp(res->name, old_label_id.id) == 0) |
| 998 | sprintf((void *) res->name, "%s", |
| 999 | new_label_id.id); |
Dan Williams | c4703ce | 2019-04-30 21:51:21 -0700 | [diff] [blame] | 1000 | |
| 1001 | mutex_lock(&nd_mapping->lock); |
| 1002 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
| 1003 | struct nd_namespace_label *nd_label = label_ent->label; |
| 1004 | struct nd_label_id label_id; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1005 | uuid_t uuid; |
Dan Williams | c4703ce | 2019-04-30 21:51:21 -0700 | [diff] [blame] | 1006 | |
| 1007 | if (!nd_label) |
| 1008 | continue; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1009 | nsl_get_uuid(ndd, nd_label, &uuid); |
| 1010 | nd_label_gen_id(&label_id, &uuid, |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1011 | nsl_get_flags(ndd, nd_label)); |
Dan Williams | c4703ce | 2019-04-30 21:51:21 -0700 | [diff] [blame] | 1012 | if (strcmp(old_label_id.id, label_id.id) == 0) |
| 1013 | set_bit(ND_LABEL_REAP, &label_ent->flags); |
| 1014 | } |
| 1015 | mutex_unlock(&nd_mapping->lock); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1016 | } |
| 1017 | kfree(*old_uuid); |
| 1018 | out: |
| 1019 | *old_uuid = new_uuid; |
| 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | static ssize_t uuid_store(struct device *dev, |
| 1024 | struct device_attribute *attr, const char *buf, size_t len) |
| 1025 | { |
| 1026 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1027 | uuid_t *uuid = NULL; |
| 1028 | uuid_t **ns_uuid; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1029 | ssize_t rc = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1030 | |
| 1031 | if (is_namespace_pmem(dev)) { |
| 1032 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1033 | |
| 1034 | ns_uuid = &nspm->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1035 | } else |
| 1036 | return -ENXIO; |
| 1037 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1038 | device_lock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1039 | nvdimm_bus_lock(dev); |
| 1040 | wait_nvdimm_bus_probe_idle(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1041 | if (to_ndns(dev)->claim) |
| 1042 | rc = -EBUSY; |
| 1043 | if (rc >= 0) |
| 1044 | rc = nd_uuid_store(dev, &uuid, buf, len); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1045 | if (rc >= 0) |
| 1046 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1047 | if (rc >= 0) |
| 1048 | rc = nd_namespace_label_update(nd_region, dev); |
| 1049 | else |
| 1050 | kfree(uuid); |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1051 | dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf, |
| 1052 | buf[len - 1] == '\n' ? "" : "\n"); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1053 | nvdimm_bus_unlock(dev); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1054 | device_unlock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1055 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1056 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1057 | } |
| 1058 | static DEVICE_ATTR_RW(uuid); |
| 1059 | |
| 1060 | static ssize_t resource_show(struct device *dev, |
| 1061 | struct device_attribute *attr, char *buf) |
| 1062 | { |
| 1063 | struct resource *res; |
| 1064 | |
| 1065 | if (is_namespace_pmem(dev)) { |
| 1066 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1067 | |
| 1068 | res = &nspm->nsio.res; |
| 1069 | } else if (is_namespace_io(dev)) { |
| 1070 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 1071 | |
| 1072 | res = &nsio->res; |
| 1073 | } else |
| 1074 | return -ENXIO; |
| 1075 | |
| 1076 | /* no address to convey if the namespace has no allocation */ |
| 1077 | if (resource_size(res) == 0) |
| 1078 | return -ENXIO; |
| 1079 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); |
| 1080 | } |
Dan Williams | 5cf81ce | 2020-07-20 15:08:13 -0700 | [diff] [blame] | 1081 | static DEVICE_ATTR_ADMIN_RO(resource); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1082 | |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 1083 | static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
| 1084 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1085 | static ssize_t sector_size_show(struct device *dev, |
| 1086 | struct device_attribute *attr, char *buf) |
| 1087 | { |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 1088 | if (is_namespace_pmem(dev)) { |
| 1089 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1090 | |
Dan Williams | b2c48f9 | 2017-08-11 17:36:54 -0700 | [diff] [blame] | 1091 | return nd_size_select_show(nspm->lbasize, |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 1092 | pmem_lbasize_supported, buf); |
| 1093 | } |
| 1094 | return -ENXIO; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | static ssize_t sector_size_store(struct device *dev, |
| 1098 | struct device_attribute *attr, const char *buf, size_t len) |
| 1099 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1100 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 1101 | const unsigned long *supported; |
| 1102 | unsigned long *lbasize; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1103 | ssize_t rc = 0; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1104 | |
Dan Williams | fadc38a | 2022-03-09 19:49:32 -0800 | [diff] [blame] | 1105 | if (is_namespace_pmem(dev)) { |
Dan Williams | f979b13 | 2017-06-04 12:12:07 +0900 | [diff] [blame] | 1106 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1107 | |
| 1108 | lbasize = &nspm->lbasize; |
| 1109 | supported = pmem_lbasize_supported; |
| 1110 | } else |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1111 | return -ENXIO; |
| 1112 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1113 | device_lock(dev); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1114 | nvdimm_bus_lock(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1115 | if (to_ndns(dev)->claim) |
| 1116 | rc = -EBUSY; |
| 1117 | if (rc >= 0) |
Dan Williams | b2c48f9 | 2017-08-11 17:36:54 -0700 | [diff] [blame] | 1118 | rc = nd_size_select_store(dev, buf, lbasize, supported); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1119 | if (rc >= 0) |
| 1120 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1121 | dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote", |
| 1122 | buf, buf[len - 1] == '\n' ? "" : "\n"); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1123 | nvdimm_bus_unlock(dev); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1124 | device_unlock(dev); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1125 | |
| 1126 | return rc ? rc : len; |
| 1127 | } |
| 1128 | static DEVICE_ATTR_RW(sector_size); |
| 1129 | |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1130 | static ssize_t dpa_extents_show(struct device *dev, |
| 1131 | struct device_attribute *attr, char *buf) |
| 1132 | { |
| 1133 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 1134 | struct nd_label_id label_id; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1135 | uuid_t *uuid = NULL; |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1136 | int count = 0, i; |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1137 | u32 flags = 0; |
| 1138 | |
| 1139 | nvdimm_bus_lock(dev); |
| 1140 | if (is_namespace_pmem(dev)) { |
| 1141 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1142 | |
| 1143 | uuid = nspm->uuid; |
| 1144 | flags = 0; |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | if (!uuid) |
| 1148 | goto out; |
| 1149 | |
| 1150 | nd_label_gen_id(&label_id, uuid, flags); |
| 1151 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1152 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1153 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1154 | struct resource *res; |
| 1155 | |
| 1156 | for_each_dpa_resource(ndd, res) |
| 1157 | if (strcmp(res->name, label_id.id) == 0) |
| 1158 | count++; |
| 1159 | } |
| 1160 | out: |
| 1161 | nvdimm_bus_unlock(dev); |
| 1162 | |
| 1163 | return sprintf(buf, "%d\n", count); |
| 1164 | } |
| 1165 | static DEVICE_ATTR_RO(dpa_extents); |
| 1166 | |
Vishal Verma | 14e4945 | 2017-06-28 14:25:00 -0600 | [diff] [blame] | 1167 | static int btt_claim_class(struct device *dev) |
| 1168 | { |
| 1169 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 1170 | int i, loop_bitmask = 0; |
| 1171 | |
| 1172 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1173 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1174 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1175 | struct nd_namespace_index *nsindex; |
| 1176 | |
Dan Williams | 33a5608 | 2017-09-18 14:48:58 -0700 | [diff] [blame] | 1177 | /* |
| 1178 | * If any of the DIMMs do not support labels the only |
| 1179 | * possible BTT format is v1. |
| 1180 | */ |
| 1181 | if (!ndd) { |
| 1182 | loop_bitmask = 0; |
| 1183 | break; |
| 1184 | } |
| 1185 | |
Vishal Verma | 14e4945 | 2017-06-28 14:25:00 -0600 | [diff] [blame] | 1186 | nsindex = to_namespace_index(ndd, ndd->ns_current); |
| 1187 | if (nsindex == NULL) |
| 1188 | loop_bitmask |= 1; |
| 1189 | else { |
| 1190 | /* check whether existing labels are v1.1 or v1.2 */ |
| 1191 | if (__le16_to_cpu(nsindex->major) == 1 |
| 1192 | && __le16_to_cpu(nsindex->minor) == 1) |
| 1193 | loop_bitmask |= 2; |
| 1194 | else |
| 1195 | loop_bitmask |= 4; |
| 1196 | } |
| 1197 | } |
| 1198 | /* |
| 1199 | * If nsindex is null loop_bitmask's bit 0 will be set, and if an index |
| 1200 | * block is found, a v1.1 label for any mapping will set bit 1, and a |
| 1201 | * v1.2 label will set bit 2. |
| 1202 | * |
| 1203 | * At the end of the loop, at most one of the three bits must be set. |
| 1204 | * If multiple bits were set, it means the different mappings disagree |
| 1205 | * about their labels, and this must be cleaned up first. |
| 1206 | * |
| 1207 | * If all the label index blocks are found to agree, nsindex of NULL |
| 1208 | * implies labels haven't been initialized yet, and when they will, |
| 1209 | * they will be of the 1.2 format, so we can assume BTT2.0 |
| 1210 | * |
| 1211 | * If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are |
| 1212 | * found, we enforce BTT2.0 |
| 1213 | * |
| 1214 | * If the loop was never entered, default to BTT1.1 (legacy namespaces) |
| 1215 | */ |
| 1216 | switch (loop_bitmask) { |
| 1217 | case 0: |
| 1218 | case 2: |
| 1219 | return NVDIMM_CCLASS_BTT; |
| 1220 | case 1: |
| 1221 | case 4: |
| 1222 | return NVDIMM_CCLASS_BTT2; |
| 1223 | default: |
| 1224 | return -ENXIO; |
| 1225 | } |
| 1226 | } |
| 1227 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1228 | static ssize_t holder_show(struct device *dev, |
| 1229 | struct device_attribute *attr, char *buf) |
| 1230 | { |
| 1231 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1232 | ssize_t rc; |
| 1233 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1234 | device_lock(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1235 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1236 | device_unlock(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1237 | |
| 1238 | return rc; |
| 1239 | } |
| 1240 | static DEVICE_ATTR_RO(holder); |
| 1241 | |
Ira Weiny | ab84b77 | 2019-11-14 19:06:34 -0800 | [diff] [blame] | 1242 | static int __holder_class_store(struct device *dev, const char *buf) |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1243 | { |
| 1244 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1245 | |
| 1246 | if (dev->driver || ndns->claim) |
| 1247 | return -EBUSY; |
| 1248 | |
Ira Weiny | ab84b77 | 2019-11-14 19:06:34 -0800 | [diff] [blame] | 1249 | if (sysfs_streq(buf, "btt")) { |
| 1250 | int rc = btt_claim_class(dev); |
| 1251 | |
| 1252 | if (rc < NVDIMM_CCLASS_NONE) |
| 1253 | return rc; |
| 1254 | ndns->claim_class = rc; |
| 1255 | } else if (sysfs_streq(buf, "pfn")) |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1256 | ndns->claim_class = NVDIMM_CCLASS_PFN; |
Dan Williams | 075c3fd | 2019-03-04 12:14:04 -0800 | [diff] [blame] | 1257 | else if (sysfs_streq(buf, "dax")) |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1258 | ndns->claim_class = NVDIMM_CCLASS_DAX; |
Dan Williams | 075c3fd | 2019-03-04 12:14:04 -0800 | [diff] [blame] | 1259 | else if (sysfs_streq(buf, "")) |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1260 | ndns->claim_class = NVDIMM_CCLASS_NONE; |
| 1261 | else |
| 1262 | return -EINVAL; |
| 1263 | |
| 1264 | return 0; |
| 1265 | } |
| 1266 | |
| 1267 | static ssize_t holder_class_store(struct device *dev, |
| 1268 | struct device_attribute *attr, const char *buf, size_t len) |
| 1269 | { |
| 1270 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Ira Weiny | ab84b77 | 2019-11-14 19:06:34 -0800 | [diff] [blame] | 1271 | int rc; |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1272 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1273 | device_lock(dev); |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1274 | nvdimm_bus_lock(dev); |
| 1275 | wait_nvdimm_bus_probe_idle(dev); |
| 1276 | rc = __holder_class_store(dev, buf); |
| 1277 | if (rc >= 0) |
| 1278 | rc = nd_namespace_label_update(nd_region, dev); |
Ira Weiny | ab84b77 | 2019-11-14 19:06:34 -0800 | [diff] [blame] | 1279 | dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc); |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1280 | nvdimm_bus_unlock(dev); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1281 | device_unlock(dev); |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1282 | |
| 1283 | return rc < 0 ? rc : len; |
| 1284 | } |
| 1285 | |
| 1286 | static ssize_t holder_class_show(struct device *dev, |
| 1287 | struct device_attribute *attr, char *buf) |
| 1288 | { |
| 1289 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1290 | ssize_t rc; |
| 1291 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1292 | device_lock(dev); |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1293 | if (ndns->claim_class == NVDIMM_CCLASS_NONE) |
| 1294 | rc = sprintf(buf, "\n"); |
Vishal Verma | 14e4945 | 2017-06-28 14:25:00 -0600 | [diff] [blame] | 1295 | else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || |
| 1296 | (ndns->claim_class == NVDIMM_CCLASS_BTT2)) |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1297 | rc = sprintf(buf, "btt\n"); |
| 1298 | else if (ndns->claim_class == NVDIMM_CCLASS_PFN) |
| 1299 | rc = sprintf(buf, "pfn\n"); |
| 1300 | else if (ndns->claim_class == NVDIMM_CCLASS_DAX) |
| 1301 | rc = sprintf(buf, "dax\n"); |
| 1302 | else |
| 1303 | rc = sprintf(buf, "<unknown>\n"); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1304 | device_unlock(dev); |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1305 | |
| 1306 | return rc; |
| 1307 | } |
| 1308 | static DEVICE_ATTR_RW(holder_class); |
| 1309 | |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1310 | static ssize_t mode_show(struct device *dev, |
| 1311 | struct device_attribute *attr, char *buf) |
| 1312 | { |
| 1313 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1314 | struct device *claim; |
| 1315 | char *mode; |
| 1316 | ssize_t rc; |
| 1317 | |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1318 | device_lock(dev); |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1319 | claim = ndns->claim; |
Dan Williams | 9c41242 | 2016-01-23 15:34:10 -0800 | [diff] [blame] | 1320 | if (claim && is_nd_btt(claim)) |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1321 | mode = "safe"; |
Dan Williams | 9c41242 | 2016-01-23 15:34:10 -0800 | [diff] [blame] | 1322 | else if (claim && is_nd_pfn(claim)) |
| 1323 | mode = "memory"; |
Dan Williams | cd03412 | 2016-03-11 10:15:36 -0800 | [diff] [blame] | 1324 | else if (claim && is_nd_dax(claim)) |
| 1325 | mode = "dax"; |
Dan Williams | 9c41242 | 2016-01-23 15:34:10 -0800 | [diff] [blame] | 1326 | else if (!claim && pmem_should_map_pages(dev)) |
| 1327 | mode = "memory"; |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1328 | else |
| 1329 | mode = "raw"; |
| 1330 | rc = sprintf(buf, "%s\n", mode); |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1331 | device_unlock(dev); |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1332 | |
| 1333 | return rc; |
| 1334 | } |
| 1335 | static DEVICE_ATTR_RO(mode); |
| 1336 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1337 | static ssize_t force_raw_store(struct device *dev, |
| 1338 | struct device_attribute *attr, const char *buf, size_t len) |
| 1339 | { |
| 1340 | bool force_raw; |
| 1341 | int rc = strtobool(buf, &force_raw); |
| 1342 | |
| 1343 | if (rc) |
| 1344 | return rc; |
| 1345 | |
| 1346 | to_ndns(dev)->force_raw = force_raw; |
| 1347 | return len; |
| 1348 | } |
| 1349 | |
| 1350 | static ssize_t force_raw_show(struct device *dev, |
| 1351 | struct device_attribute *attr, char *buf) |
| 1352 | { |
| 1353 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); |
| 1354 | } |
| 1355 | static DEVICE_ATTR_RW(force_raw); |
| 1356 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1357 | static struct attribute *nd_namespace_attributes[] = { |
| 1358 | &dev_attr_nstype.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1359 | &dev_attr_size.attr, |
Dan Williams | 0731de0 | 2015-12-14 15:34:15 -0800 | [diff] [blame] | 1360 | &dev_attr_mode.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1361 | &dev_attr_uuid.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1362 | &dev_attr_holder.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1363 | &dev_attr_resource.attr, |
| 1364 | &dev_attr_alt_name.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1365 | &dev_attr_force_raw.attr, |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1366 | &dev_attr_sector_size.attr, |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1367 | &dev_attr_dpa_extents.attr, |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1368 | &dev_attr_holder_class.attr, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1369 | NULL, |
| 1370 | }; |
| 1371 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1372 | static umode_t namespace_visible(struct kobject *kobj, |
| 1373 | struct attribute *a, int n) |
| 1374 | { |
| 1375 | struct device *dev = container_of(kobj, struct device, kobj); |
| 1376 | |
Dan Williams | fadc38a | 2022-03-09 19:49:32 -0800 | [diff] [blame] | 1377 | if (is_namespace_pmem(dev)) { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1378 | if (a == &dev_attr_size.attr) |
Fabian Frederick | b44fe76 | 2016-12-04 10:54:08 -0800 | [diff] [blame] | 1379 | return 0644; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1380 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1381 | return a->mode; |
| 1382 | } |
| 1383 | |
Dan Williams | 13f445d | 2021-01-12 23:35:50 -0800 | [diff] [blame] | 1384 | /* base is_namespace_io() attributes */ |
| 1385 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr || |
| 1386 | a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr || |
| 1387 | a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr || |
| 1388 | a == &dev_attr_resource.attr) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1389 | return a->mode; |
| 1390 | |
| 1391 | return 0; |
| 1392 | } |
| 1393 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1394 | static struct attribute_group nd_namespace_attribute_group = { |
| 1395 | .attrs = nd_namespace_attributes, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1396 | .is_visible = namespace_visible, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1397 | }; |
| 1398 | |
| 1399 | static const struct attribute_group *nd_namespace_attribute_groups[] = { |
| 1400 | &nd_device_attribute_group, |
| 1401 | &nd_namespace_attribute_group, |
Toshi Kani | 74ae66c | 2015-06-19 12:18:34 -0600 | [diff] [blame] | 1402 | &nd_numa_attribute_group, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1403 | NULL, |
| 1404 | }; |
| 1405 | |
Dan Williams | 78c81cc | 2019-11-06 19:56:41 -0800 | [diff] [blame] | 1406 | static const struct device_type namespace_io_device_type = { |
| 1407 | .name = "nd_namespace_io", |
| 1408 | .release = namespace_io_release, |
| 1409 | .groups = nd_namespace_attribute_groups, |
| 1410 | }; |
| 1411 | |
| 1412 | static const struct device_type namespace_pmem_device_type = { |
| 1413 | .name = "nd_namespace_pmem", |
| 1414 | .release = namespace_pmem_release, |
| 1415 | .groups = nd_namespace_attribute_groups, |
| 1416 | }; |
| 1417 | |
Dan Williams | 78c81cc | 2019-11-06 19:56:41 -0800 | [diff] [blame] | 1418 | static bool is_namespace_pmem(const struct device *dev) |
| 1419 | { |
| 1420 | return dev ? dev->type == &namespace_pmem_device_type : false; |
| 1421 | } |
| 1422 | |
Dan Williams | 78c81cc | 2019-11-06 19:56:41 -0800 | [diff] [blame] | 1423 | static bool is_namespace_io(const struct device *dev) |
| 1424 | { |
| 1425 | return dev ? dev->type == &namespace_io_device_type : false; |
| 1426 | } |
| 1427 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1428 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
| 1429 | { |
| 1430 | 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] | 1431 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
Dan Williams | cd03412 | 2016-03-11 10:15:36 -0800 | [diff] [blame] | 1432 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1433 | struct nd_namespace_common *ndns = NULL; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1434 | resource_size_t size; |
| 1435 | |
Dan Williams | cd03412 | 2016-03-11 10:15:36 -0800 | [diff] [blame] | 1436 | if (nd_btt || nd_pfn || nd_dax) { |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1437 | if (nd_btt) |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame] | 1438 | ndns = nd_btt->ndns; |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1439 | else if (nd_pfn) |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame] | 1440 | ndns = nd_pfn->ndns; |
Dan Williams | cd03412 | 2016-03-11 10:15:36 -0800 | [diff] [blame] | 1441 | else if (nd_dax) |
| 1442 | ndns = nd_dax->nd_pfn.ndns; |
Dan Williams | e145574 | 2015-07-30 17:57:47 -0400 | [diff] [blame] | 1443 | |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1444 | if (!ndns) |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1445 | return ERR_PTR(-ENODEV); |
| 1446 | |
| 1447 | /* |
| 1448 | * Flush any in-progess probes / removals in the driver |
| 1449 | * for the raw personality of this namespace. |
| 1450 | */ |
Dan Williams | 81beea5 | 2022-04-21 08:33:39 -0700 | [diff] [blame] | 1451 | device_lock(&ndns->dev); |
| 1452 | device_unlock(&ndns->dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1453 | if (ndns->dev.driver) { |
| 1454 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1455 | dev_name(dev)); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1456 | return ERR_PTR(-EBUSY); |
| 1457 | } |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1458 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1459 | "host (%s) vs claim (%s) mismatch\n", |
Dan Williams | 0bfb8dd | 2016-04-13 17:06:48 -0700 | [diff] [blame] | 1460 | dev_name(dev), |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1461 | dev_name(ndns->claim))) |
| 1462 | return ERR_PTR(-ENXIO); |
| 1463 | } else { |
| 1464 | ndns = to_ndns(dev); |
| 1465 | if (ndns->claim) { |
| 1466 | dev_dbg(dev, "claimed by %s, failing probe\n", |
| 1467 | dev_name(ndns->claim)); |
| 1468 | |
| 1469 | return ERR_PTR(-ENXIO); |
| 1470 | } |
| 1471 | } |
| 1472 | |
Dan Williams | 08e6b3c | 2018-06-13 09:08:36 -0700 | [diff] [blame] | 1473 | if (nvdimm_namespace_locked(ndns)) |
| 1474 | return ERR_PTR(-EACCES); |
| 1475 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1476 | size = nvdimm_namespace_capacity(ndns); |
| 1477 | if (size < ND_MIN_NAMESPACE_SIZE) { |
| 1478 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", |
| 1479 | &size, ND_MIN_NAMESPACE_SIZE); |
| 1480 | return ERR_PTR(-ENODEV); |
| 1481 | } |
| 1482 | |
Dan Williams | 6acd7d5 | 2020-02-27 21:39:23 -0800 | [diff] [blame] | 1483 | /* |
| 1484 | * Note, alignment validation for fsdax and devdax mode |
| 1485 | * namespaces happens in nd_pfn_validate() where infoblock |
| 1486 | * padding parameters can be applied. |
| 1487 | */ |
| 1488 | if (pmem_should_map_pages(dev)) { |
| 1489 | struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev); |
| 1490 | struct resource *res = &nsio->res; |
| 1491 | |
| 1492 | if (!IS_ALIGNED(res->start | (res->end + 1), |
| 1493 | memremap_compat_align())) { |
| 1494 | dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res); |
| 1495 | return ERR_PTR(-EOPNOTSUPP); |
| 1496 | } |
| 1497 | } |
| 1498 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1499 | if (is_namespace_pmem(&ndns->dev)) { |
| 1500 | struct nd_namespace_pmem *nspm; |
| 1501 | |
| 1502 | nspm = to_nd_namespace_pmem(&ndns->dev); |
Dmitry Krivenok | bd26d0d | 2015-12-02 00:48:12 +0300 | [diff] [blame] | 1503 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1504 | return ERR_PTR(-ENODEV); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1505 | } |
| 1506 | |
| 1507 | return ndns; |
| 1508 | } |
| 1509 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); |
| 1510 | |
Aneesh Kumar K.V | 8f4b01f | 2019-10-31 16:27:41 +0530 | [diff] [blame] | 1511 | int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns, |
| 1512 | resource_size_t size) |
| 1513 | { |
Aneesh Kumar K.V | 8f4b01f | 2019-10-31 16:27:41 +0530 | [diff] [blame] | 1514 | return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size); |
| 1515 | } |
| 1516 | EXPORT_SYMBOL_GPL(devm_namespace_enable); |
| 1517 | |
| 1518 | void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns) |
| 1519 | { |
Aneesh Kumar K.V | 8f4b01f | 2019-10-31 16:27:41 +0530 | [diff] [blame] | 1520 | devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev)); |
| 1521 | } |
| 1522 | EXPORT_SYMBOL_GPL(devm_namespace_disable); |
| 1523 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1524 | static struct device **create_namespace_io(struct nd_region *nd_region) |
| 1525 | { |
| 1526 | struct nd_namespace_io *nsio; |
| 1527 | struct device *dev, **devs; |
| 1528 | struct resource *res; |
| 1529 | |
| 1530 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); |
| 1531 | if (!nsio) |
| 1532 | return NULL; |
| 1533 | |
| 1534 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 1535 | if (!devs) { |
| 1536 | kfree(nsio); |
| 1537 | return NULL; |
| 1538 | } |
| 1539 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1540 | dev = &nsio->common.dev; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1541 | dev->type = &namespace_io_device_type; |
| 1542 | dev->parent = &nd_region->dev; |
| 1543 | res = &nsio->res; |
| 1544 | res->name = dev_name(&nd_region->dev); |
| 1545 | res->flags = IORESOURCE_MEM; |
| 1546 | res->start = nd_region->ndr_start; |
| 1547 | res->end = res->start + nd_region->ndr_size - 1; |
| 1548 | |
| 1549 | devs[0] = dev; |
| 1550 | return devs; |
| 1551 | } |
| 1552 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1553 | static bool has_uuid_at_pos(struct nd_region *nd_region, const uuid_t *uuid, |
| 1554 | u64 cookie, u16 pos) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1555 | { |
| 1556 | struct nd_namespace_label *found = NULL; |
| 1557 | int i; |
| 1558 | |
| 1559 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1560 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
Dan Williams | faec6f8 | 2017-06-06 11:10:51 -0700 | [diff] [blame] | 1561 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
| 1562 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1563 | struct nd_label_ent *label_ent; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1564 | bool found_uuid = false; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1565 | |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1566 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
| 1567 | struct nd_namespace_label *nd_label = label_ent->label; |
Dan Williams | 8172db9 | 2021-09-08 22:11:42 -0700 | [diff] [blame] | 1568 | u16 position; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1569 | |
| 1570 | if (!nd_label) |
| 1571 | continue; |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1572 | position = nsl_get_position(ndd, nd_label); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1573 | |
Dan Williams | 9761b02 | 2021-08-24 09:05:35 -0700 | [diff] [blame] | 1574 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1575 | continue; |
| 1576 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1577 | if (!nsl_uuid_equal(ndd, nd_label, uuid)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1578 | continue; |
| 1579 | |
Dan Williams | 8b03aa0 | 2021-08-24 09:06:02 -0700 | [diff] [blame] | 1580 | if (!nsl_validate_type_guid(ndd, nd_label, |
| 1581 | &nd_set->type_guid)) |
Dan Williams | faec6f8 | 2017-06-06 11:10:51 -0700 | [diff] [blame] | 1582 | continue; |
Dan Williams | faec6f8 | 2017-06-06 11:10:51 -0700 | [diff] [blame] | 1583 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1584 | if (found_uuid) { |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1585 | dev_dbg(ndd->dev, "duplicate entry for uuid\n"); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1586 | return false; |
| 1587 | } |
| 1588 | found_uuid = true; |
Dan Williams | 8172db9 | 2021-09-08 22:11:42 -0700 | [diff] [blame] | 1589 | if (!nsl_validate_nlabel(nd_region, ndd, nd_label)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1590 | continue; |
| 1591 | if (position != pos) |
| 1592 | continue; |
| 1593 | found = nd_label; |
| 1594 | break; |
| 1595 | } |
| 1596 | if (found) |
| 1597 | break; |
| 1598 | } |
| 1599 | return found != NULL; |
| 1600 | } |
| 1601 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1602 | static int select_pmem_id(struct nd_region *nd_region, const uuid_t *pmem_id) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1603 | { |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1604 | int i; |
| 1605 | |
| 1606 | if (!pmem_id) |
| 1607 | return -ENODEV; |
| 1608 | |
| 1609 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1610 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1611 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1612 | struct nd_namespace_label *nd_label = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1613 | u64 hw_start, hw_end, pmem_start, pmem_end; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1614 | struct nd_label_ent *label_ent; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1615 | |
Dan Williams | 9cf8bd5 | 2016-12-15 20:04:31 -0800 | [diff] [blame] | 1616 | lockdep_assert_held(&nd_mapping->lock); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1617 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
| 1618 | nd_label = label_ent->label; |
| 1619 | if (!nd_label) |
| 1620 | continue; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1621 | if (nsl_uuid_equal(ndd, nd_label, pmem_id)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1622 | break; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1623 | nd_label = NULL; |
| 1624 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1625 | |
| 1626 | if (!nd_label) { |
| 1627 | WARN_ON(1); |
| 1628 | return -EINVAL; |
| 1629 | } |
| 1630 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 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; |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1637 | pmem_start = nsl_get_dpa(ndd, nd_label); |
| 1638 | pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label); |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1639 | if (pmem_start >= hw_start && pmem_start < hw_end |
| 1640 | && pmem_end <= hw_end && pmem_end > hw_start) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1641 | /* pass */; |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1642 | else { |
| 1643 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1644 | dev_name(ndd->dev), |
| 1645 | nsl_uuid_raw(ndd, nd_label)); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1646 | return -EINVAL; |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1647 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1648 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1649 | /* move recently validated label to the front of the list */ |
| 1650 | list_move(&label_ent->list, &nd_mapping->labels); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1651 | } |
| 1652 | return 0; |
| 1653 | } |
| 1654 | |
| 1655 | /** |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1656 | * create_namespace_pmem - validate interleave set labelling, retrieve label0 |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1657 | * @nd_region: region with mappings to validate |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1658 | * @nspm: target namespace to create |
| 1659 | * @nd_label: target pmem namespace label to evaluate |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1660 | */ |
Colin Ian King | 65853a1 | 2017-10-05 10:55:57 +0100 | [diff] [blame] | 1661 | static struct device *create_namespace_pmem(struct nd_region *nd_region, |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1662 | struct nd_mapping *nd_mapping, |
| 1663 | struct nd_namespace_label *nd_label) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1664 | { |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1665 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1666 | struct nd_namespace_index *nsindex = |
| 1667 | to_namespace_index(ndd, ndd->ns_current); |
Dan Williams | c12c48c | 2017-06-04 10:59:15 +0900 | [diff] [blame] | 1668 | u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
Dan Williams | 86ef58a | 2017-02-28 18:32:48 -0800 | [diff] [blame] | 1669 | u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1670 | struct nd_label_ent *label_ent; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1671 | struct nd_namespace_pmem *nspm; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1672 | resource_size_t size = 0; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1673 | struct resource *res; |
| 1674 | struct device *dev; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1675 | uuid_t uuid; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1676 | int rc = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1677 | u16 i; |
| 1678 | |
Dan Williams | 4765218 | 2016-09-15 18:08:05 -0700 | [diff] [blame] | 1679 | if (cookie == 0) { |
| 1680 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1681 | return ERR_PTR(-ENXIO); |
Dan Williams | 4765218 | 2016-09-15 18:08:05 -0700 | [diff] [blame] | 1682 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1683 | |
Dan Williams | 9761b02 | 2021-08-24 09:05:35 -0700 | [diff] [blame] | 1684 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) { |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1685 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1686 | nsl_uuid_raw(ndd, nd_label)); |
Dan Williams | 9761b02 | 2021-08-24 09:05:35 -0700 | [diff] [blame] | 1687 | if (!nsl_validate_isetcookie(ndd, nd_label, altcookie)) |
Dan Williams | 86ef58a | 2017-02-28 18:32:48 -0800 | [diff] [blame] | 1688 | return ERR_PTR(-EAGAIN); |
| 1689 | |
| 1690 | dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1691 | nsl_uuid_raw(ndd, nd_label)); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1692 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1693 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1694 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
| 1695 | if (!nspm) |
| 1696 | return ERR_PTR(-ENOMEM); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1697 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1698 | nspm->id = -1; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1699 | dev = &nspm->nsio.common.dev; |
| 1700 | dev->type = &namespace_pmem_device_type; |
| 1701 | dev->parent = &nd_region->dev; |
| 1702 | res = &nspm->nsio.res; |
| 1703 | res->name = dev_name(&nd_region->dev); |
| 1704 | res->flags = IORESOURCE_MEM; |
| 1705 | |
Dan Williams | 86ef58a | 2017-02-28 18:32:48 -0800 | [diff] [blame] | 1706 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1707 | nsl_get_uuid(ndd, nd_label, &uuid); |
| 1708 | if (has_uuid_at_pos(nd_region, &uuid, cookie, i)) |
Dan Williams | 86ef58a | 2017-02-28 18:32:48 -0800 | [diff] [blame] | 1709 | continue; |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1710 | if (has_uuid_at_pos(nd_region, &uuid, altcookie, i)) |
Dan Williams | 86ef58a | 2017-02-28 18:32:48 -0800 | [diff] [blame] | 1711 | continue; |
| 1712 | break; |
| 1713 | } |
| 1714 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1715 | if (i < nd_region->ndr_mappings) { |
Dan Williams | 4f86722 | 2018-04-06 16:37:21 -0700 | [diff] [blame] | 1716 | struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1717 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1718 | /* |
| 1719 | * Give up if we don't find an instance of a uuid at each |
| 1720 | * position (from 0 to nd_region->ndr_mappings - 1), or if we |
| 1721 | * find a dimm with two instances of the same uuid. |
| 1722 | */ |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1723 | dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1724 | nvdimm_name(nvdimm), nsl_uuid_raw(ndd, nd_label)); |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1725 | rc = -EINVAL; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1726 | goto err; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1727 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1728 | |
| 1729 | /* |
| 1730 | * Fix up each mapping's 'labels' to have the validated pmem label for |
| 1731 | * that position at labels[0], and NULL at labels[1]. In the process, |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 1732 | * check that the namespace aligns with interleave-set. |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1733 | */ |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1734 | nsl_get_uuid(ndd, nd_label, &uuid); |
| 1735 | rc = select_pmem_id(nd_region, &uuid); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1736 | if (rc) |
| 1737 | goto err; |
| 1738 | |
| 1739 | /* Calculate total size and populate namespace properties from label0 */ |
| 1740 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1741 | struct nd_namespace_label *label0; |
Dan Williams | b3fde74 | 2017-06-04 10:18:39 +0900 | [diff] [blame] | 1742 | struct nvdimm_drvdata *ndd; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1743 | |
| 1744 | nd_mapping = &nd_region->mapping[i]; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1745 | label_ent = list_first_entry_or_null(&nd_mapping->labels, |
| 1746 | typeof(*label_ent), list); |
Aneesh Kumar K.V | 86aa666 | 2019-08-09 13:17:26 +0530 | [diff] [blame] | 1747 | label0 = label_ent ? label_ent->label : NULL; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1748 | |
| 1749 | if (!label0) { |
| 1750 | WARN_ON(1); |
| 1751 | continue; |
| 1752 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1753 | |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1754 | ndd = to_ndd(nd_mapping); |
| 1755 | size += nsl_get_rawsize(ndd, label0); |
| 1756 | if (nsl_get_position(ndd, label0) != 0) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1757 | continue; |
| 1758 | WARN_ON(nspm->alt_name || nspm->uuid); |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1759 | nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0), |
| 1760 | NSLABEL_NAME_LEN, GFP_KERNEL); |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1761 | nsl_get_uuid(ndd, label0, &uuid); |
| 1762 | nspm->uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL); |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1763 | nspm->lbasize = nsl_get_lbasize(ndd, label0); |
Dan Williams | a6e6d72 | 2021-08-24 09:06:07 -0700 | [diff] [blame] | 1764 | nspm->nsio.common.claim_class = |
| 1765 | nsl_get_claim_class(ndd, label0); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1766 | } |
| 1767 | |
| 1768 | if (!nspm->alt_name || !nspm->uuid) { |
| 1769 | rc = -ENOMEM; |
| 1770 | goto err; |
| 1771 | } |
| 1772 | |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 1773 | nd_namespace_pmem_set_resource(nd_region, nspm, size); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1774 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1775 | return dev; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1776 | err: |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1777 | namespace_pmem_release(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1778 | switch (rc) { |
| 1779 | case -EINVAL: |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1780 | dev_dbg(&nd_region->dev, "invalid label(s)\n"); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1781 | break; |
| 1782 | case -ENODEV: |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1783 | dev_dbg(&nd_region->dev, "label not found\n"); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1784 | break; |
| 1785 | default: |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 1786 | dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1787 | break; |
| 1788 | } |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1789 | return ERR_PTR(rc); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1790 | } |
| 1791 | |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1792 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
| 1793 | { |
| 1794 | struct nd_namespace_pmem *nspm; |
| 1795 | struct resource *res; |
| 1796 | struct device *dev; |
| 1797 | |
Dan Williams | c9e582a | 2017-05-29 23:12:19 -0700 | [diff] [blame] | 1798 | if (!is_memory(&nd_region->dev)) |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1799 | return NULL; |
| 1800 | |
| 1801 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
| 1802 | if (!nspm) |
| 1803 | return NULL; |
| 1804 | |
| 1805 | dev = &nspm->nsio.common.dev; |
| 1806 | dev->type = &namespace_pmem_device_type; |
| 1807 | dev->parent = &nd_region->dev; |
| 1808 | res = &nspm->nsio.res; |
| 1809 | res->name = dev_name(&nd_region->dev); |
| 1810 | res->flags = IORESOURCE_MEM; |
| 1811 | |
| 1812 | nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); |
| 1813 | if (nspm->id < 0) { |
| 1814 | kfree(nspm); |
| 1815 | return NULL; |
| 1816 | } |
| 1817 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1818 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
| 1819 | |
| 1820 | return dev; |
| 1821 | } |
| 1822 | |
Dan Williams | 4a0079b | 2022-04-21 08:33:29 -0700 | [diff] [blame] | 1823 | static struct lock_class_key nvdimm_namespace_key; |
| 1824 | |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1825 | void nd_region_create_ns_seed(struct nd_region *nd_region) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1826 | { |
| 1827 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1828 | |
| 1829 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) |
| 1830 | return; |
| 1831 | |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 1832 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region); |
Dan Williams | 98a29c3 | 2016-09-30 15:28:27 -0700 | [diff] [blame] | 1833 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1834 | /* |
| 1835 | * Seed creation failures are not fatal, provisioning is simply |
| 1836 | * disabled until memory becomes available |
| 1837 | */ |
| 1838 | if (!nd_region->ns_seed) |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 1839 | dev_err(&nd_region->dev, "failed to create namespace\n"); |
Dan Williams | 4a0079b | 2022-04-21 08:33:29 -0700 | [diff] [blame] | 1840 | else { |
| 1841 | device_initialize(nd_region->ns_seed); |
| 1842 | lockdep_set_class(&nd_region->ns_seed->mutex, |
| 1843 | &nvdimm_namespace_key); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1844 | nd_device_register(nd_region->ns_seed); |
Dan Williams | 4a0079b | 2022-04-21 08:33:29 -0700 | [diff] [blame] | 1845 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1846 | } |
| 1847 | |
Dan Williams | cd03412 | 2016-03-11 10:15:36 -0800 | [diff] [blame] | 1848 | void nd_region_create_dax_seed(struct nd_region *nd_region) |
| 1849 | { |
| 1850 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1851 | nd_region->dax_seed = nd_dax_create(nd_region); |
| 1852 | /* |
| 1853 | * Seed creation failures are not fatal, provisioning is simply |
| 1854 | * disabled until memory becomes available |
| 1855 | */ |
| 1856 | if (!nd_region->dax_seed) |
| 1857 | dev_err(&nd_region->dev, "failed to create dax namespace\n"); |
| 1858 | } |
| 1859 | |
Dan Williams | 2dc4333 | 2015-12-13 11:41:36 -0800 | [diff] [blame] | 1860 | void nd_region_create_pfn_seed(struct nd_region *nd_region) |
| 1861 | { |
| 1862 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1863 | nd_region->pfn_seed = nd_pfn_create(nd_region); |
| 1864 | /* |
| 1865 | * Seed creation failures are not fatal, provisioning is simply |
| 1866 | * disabled until memory becomes available |
| 1867 | */ |
| 1868 | if (!nd_region->pfn_seed) |
| 1869 | dev_err(&nd_region->dev, "failed to create pfn namespace\n"); |
| 1870 | } |
| 1871 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame] | 1872 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
| 1873 | { |
| 1874 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1875 | nd_region->btt_seed = nd_btt_create(nd_region); |
| 1876 | /* |
| 1877 | * Seed creation failures are not fatal, provisioning is simply |
| 1878 | * disabled until memory becomes available |
| 1879 | */ |
| 1880 | if (!nd_region->btt_seed) |
| 1881 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); |
| 1882 | } |
| 1883 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1884 | static int add_namespace_resource(struct nd_region *nd_region, |
| 1885 | struct nd_namespace_label *nd_label, struct device **devs, |
| 1886 | int count) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1887 | { |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1888 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1889 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1890 | int i; |
| 1891 | |
| 1892 | for (i = 0; i < count; i++) { |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1893 | uuid_t *uuid = namespace_to_uuid(devs[i]); |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1894 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1895 | if (IS_ERR(uuid)) { |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1896 | WARN_ON(1); |
| 1897 | continue; |
| 1898 | } |
| 1899 | |
Dan Williams | d1c6e08 | 2021-09-08 22:11:37 -0700 | [diff] [blame] | 1900 | if (!nsl_uuid_equal(ndd, nd_label, uuid)) |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1901 | continue; |
Dan Williams | fadc38a | 2022-03-09 19:49:32 -0800 | [diff] [blame] | 1902 | dev_err(&nd_region->dev, |
| 1903 | "error: conflicting extents for uuid: %pUb\n", uuid); |
| 1904 | return -ENXIO; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1905 | } |
| 1906 | |
| 1907 | return i; |
| 1908 | } |
| 1909 | |
Dan Williams | 6ff3e91 | 2016-10-05 14:04:15 -0700 | [diff] [blame] | 1910 | static int cmp_dpa(const void *a, const void *b) |
| 1911 | { |
| 1912 | const struct device *dev_a = *(const struct device **) a; |
| 1913 | const struct device *dev_b = *(const struct device **) b; |
Dan Williams | 6ff3e91 | 2016-10-05 14:04:15 -0700 | [diff] [blame] | 1914 | struct nd_namespace_pmem *nspm_a, *nspm_b; |
| 1915 | |
| 1916 | if (is_namespace_io(dev_a)) |
| 1917 | return 0; |
| 1918 | |
Dan Williams | 6ff3e91 | 2016-10-05 14:04:15 -0700 | [diff] [blame] | 1919 | nspm_a = to_nd_namespace_pmem(dev_a); |
| 1920 | nspm_b = to_nd_namespace_pmem(dev_b); |
| 1921 | |
| 1922 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, |
| 1923 | sizeof(resource_size_t)); |
| 1924 | } |
| 1925 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1926 | static struct device **scan_labels(struct nd_region *nd_region) |
| 1927 | { |
Dan Williams | c969e24 | 2016-10-05 15:54:46 -0700 | [diff] [blame] | 1928 | int i, count = 0; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1929 | struct device *dev, **devs = NULL; |
| 1930 | struct nd_label_ent *label_ent, *e; |
Dan Williams | c969e24 | 2016-10-05 15:54:46 -0700 | [diff] [blame] | 1931 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1932 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
Dan Williams | c969e24 | 2016-10-05 15:54:46 -0700 | [diff] [blame] | 1933 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1934 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1935 | /* "safe" because create_namespace_pmem() might list_move() label_ent */ |
| 1936 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1937 | struct nd_namespace_label *nd_label = label_ent->label; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1938 | struct device **__devs; |
| 1939 | |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1940 | if (!nd_label) |
| 1941 | continue; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1942 | |
Dan Williams | c969e24 | 2016-10-05 15:54:46 -0700 | [diff] [blame] | 1943 | /* skip labels that describe extents outside of the region */ |
Dan Williams | b4366a8 | 2021-08-24 09:05:30 -0700 | [diff] [blame] | 1944 | if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start || |
| 1945 | nsl_get_dpa(ndd, nd_label) > map_end) |
| 1946 | continue; |
Dan Williams | c969e24 | 2016-10-05 15:54:46 -0700 | [diff] [blame] | 1947 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1948 | i = add_namespace_resource(nd_region, nd_label, devs, count); |
| 1949 | if (i < 0) |
| 1950 | goto err; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1951 | if (i < count) |
| 1952 | continue; |
| 1953 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); |
| 1954 | if (!__devs) |
| 1955 | goto err; |
| 1956 | memcpy(__devs, devs, sizeof(dev) * count); |
| 1957 | kfree(devs); |
| 1958 | devs = __devs; |
| 1959 | |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 1960 | dev = create_namespace_pmem(nd_region, nd_mapping, nd_label); |
Dan Williams | faec6f8 | 2017-06-06 11:10:51 -0700 | [diff] [blame] | 1961 | if (IS_ERR(dev)) { |
| 1962 | switch (PTR_ERR(dev)) { |
| 1963 | case -EAGAIN: |
| 1964 | /* skip invalid labels */ |
| 1965 | continue; |
| 1966 | case -ENODEV: |
| 1967 | /* fallthrough to seed creation */ |
| 1968 | break; |
| 1969 | default: |
| 1970 | goto err; |
| 1971 | } |
| 1972 | } else |
| 1973 | devs[count++] = dev; |
| 1974 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1975 | } |
| 1976 | |
Dan Williams | 3b6c6c0 | 2022-03-09 19:49:48 -0800 | [diff] [blame] | 1977 | dev_dbg(&nd_region->dev, "discovered %d namespace%s\n", count, |
| 1978 | count == 1 ? "" : "s"); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1979 | |
| 1980 | if (count == 0) { |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 1981 | struct nd_namespace_pmem *nspm; |
| 1982 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1983 | /* Publish a zero-sized namespace for userspace to configure. */ |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 1984 | nd_mapping_free_labels(nd_mapping); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1985 | |
| 1986 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); |
| 1987 | if (!devs) |
| 1988 | goto err; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1989 | |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 1990 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
| 1991 | if (!nspm) |
| 1992 | goto err; |
| 1993 | dev = &nspm->nsio.common.dev; |
| 1994 | dev->type = &namespace_pmem_device_type; |
| 1995 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1996 | dev->parent = &nd_region->dev; |
| 1997 | devs[count++] = dev; |
Dan Williams | c9e582a | 2017-05-29 23:12:19 -0700 | [diff] [blame] | 1998 | } else if (is_memory(&nd_region->dev)) { |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 1999 | /* clean unselected labels */ |
| 2000 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 2001 | struct list_head *l, *e; |
| 2002 | LIST_HEAD(list); |
| 2003 | int j; |
| 2004 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2005 | nd_mapping = &nd_region->mapping[i]; |
| 2006 | if (list_empty(&nd_mapping->labels)) { |
| 2007 | WARN_ON(1); |
| 2008 | continue; |
| 2009 | } |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 2010 | |
| 2011 | j = count; |
| 2012 | list_for_each_safe(l, e, &nd_mapping->labels) { |
| 2013 | if (!j--) |
| 2014 | break; |
| 2015 | list_move_tail(l, &list); |
| 2016 | } |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2017 | nd_mapping_free_labels(nd_mapping); |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 2018 | list_splice_init(&list, &nd_mapping->labels); |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2019 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2020 | } |
| 2021 | |
Dan Williams | 6ff3e91 | 2016-10-05 14:04:15 -0700 | [diff] [blame] | 2022 | if (count > 1) |
| 2023 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); |
| 2024 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2025 | return devs; |
| 2026 | |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2027 | err: |
Dan Carpenter | 75d2971 | 2016-10-12 09:34:29 +0300 | [diff] [blame] | 2028 | if (devs) { |
| 2029 | for (i = 0; devs[i]; i++) |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 2030 | namespace_pmem_release(devs[i]); |
Dan Carpenter | 75d2971 | 2016-10-12 09:34:29 +0300 | [diff] [blame] | 2031 | kfree(devs); |
| 2032 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2033 | return NULL; |
| 2034 | } |
| 2035 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2036 | static struct device **create_namespaces(struct nd_region *nd_region) |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2037 | { |
Colin Ian King | 59858d3 | 2018-01-30 17:47:07 +0000 | [diff] [blame] | 2038 | struct nd_mapping *nd_mapping; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2039 | struct device **devs; |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2040 | int i; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2041 | |
| 2042 | if (nd_region->ndr_mappings == 0) |
| 2043 | return NULL; |
| 2044 | |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2045 | /* lock down all mappings while we scan labels */ |
| 2046 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 2047 | nd_mapping = &nd_region->mapping[i]; |
| 2048 | mutex_lock_nested(&nd_mapping->lock, i); |
| 2049 | } |
| 2050 | |
| 2051 | devs = scan_labels(nd_region); |
| 2052 | |
| 2053 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 2054 | int reverse = nd_region->ndr_mappings - 1 - i; |
| 2055 | |
| 2056 | nd_mapping = &nd_region->mapping[reverse]; |
| 2057 | mutex_unlock(&nd_mapping->lock); |
| 2058 | } |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2059 | |
| 2060 | return devs; |
| 2061 | } |
| 2062 | |
Dan Williams | a2d1c7a | 2019-09-05 21:15:57 +0530 | [diff] [blame] | 2063 | static void deactivate_labels(void *region) |
| 2064 | { |
| 2065 | struct nd_region *nd_region = region; |
| 2066 | int i; |
| 2067 | |
| 2068 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 2069 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 2070 | struct nvdimm_drvdata *ndd = nd_mapping->ndd; |
| 2071 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 2072 | |
| 2073 | mutex_lock(&nd_mapping->lock); |
| 2074 | nd_mapping_free_labels(nd_mapping); |
| 2075 | mutex_unlock(&nd_mapping->lock); |
| 2076 | |
| 2077 | put_ndd(ndd); |
| 2078 | nd_mapping->ndd = NULL; |
| 2079 | if (ndd) |
| 2080 | atomic_dec(&nvdimm->busy); |
| 2081 | } |
| 2082 | } |
| 2083 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2084 | static int init_active_labels(struct nd_region *nd_region) |
| 2085 | { |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2086 | int i, rc = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2087 | |
| 2088 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 2089 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 2090 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 2091 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2092 | struct nd_label_ent *label_ent; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2093 | int count, j; |
| 2094 | |
| 2095 | /* |
Dan Williams | 9d62ed9 | 2017-05-04 11:47:22 -0700 | [diff] [blame] | 2096 | * If the dimm is disabled then we may need to prevent |
| 2097 | * the region from being activated. |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2098 | */ |
| 2099 | if (!ndd) { |
Dan Williams | 9d62ed9 | 2017-05-04 11:47:22 -0700 | [diff] [blame] | 2100 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) |
| 2101 | /* fail, label data may be unreadable */; |
Dan Williams | a0e3745 | 2020-01-30 12:06:18 -0800 | [diff] [blame] | 2102 | else if (test_bit(NDD_LABELING, &nvdimm->flags)) |
Dan Williams | 9d62ed9 | 2017-05-04 11:47:22 -0700 | [diff] [blame] | 2103 | /* fail, labels needed to disambiguate dpa */; |
| 2104 | else |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2105 | continue; |
Dan Williams | 9d62ed9 | 2017-05-04 11:47:22 -0700 | [diff] [blame] | 2106 | |
| 2107 | dev_err(&nd_region->dev, "%s: is %s, failing probe\n", |
| 2108 | dev_name(&nd_mapping->nvdimm->dev), |
| 2109 | test_bit(NDD_LOCKED, &nvdimm->flags) |
| 2110 | ? "locked" : "disabled"); |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2111 | rc = -ENXIO; |
| 2112 | goto out; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2113 | } |
| 2114 | nd_mapping->ndd = ndd; |
| 2115 | atomic_inc(&nvdimm->busy); |
| 2116 | get_ndd(ndd); |
| 2117 | |
| 2118 | count = nd_label_active_count(ndd); |
Dan Williams | 426824d | 2018-03-05 16:39:31 -0800 | [diff] [blame] | 2119 | dev_dbg(ndd->dev, "count: %d\n", count); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2120 | if (!count) |
| 2121 | continue; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2122 | for (j = 0; j < count; j++) { |
| 2123 | struct nd_namespace_label *label; |
| 2124 | |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2125 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
| 2126 | if (!label_ent) |
| 2127 | break; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2128 | label = nd_label_active(ndd, j); |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2129 | label_ent->label = label; |
| 2130 | |
| 2131 | mutex_lock(&nd_mapping->lock); |
| 2132 | list_add_tail(&label_ent->list, &nd_mapping->labels); |
| 2133 | mutex_unlock(&nd_mapping->lock); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2134 | } |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2135 | |
Dan Williams | a2d1c7a | 2019-09-05 21:15:57 +0530 | [diff] [blame] | 2136 | if (j < count) |
| 2137 | break; |
| 2138 | } |
Dan Williams | ae8219f | 2016-09-19 16:04:21 -0700 | [diff] [blame] | 2139 | |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2140 | if (i < nd_region->ndr_mappings) |
| 2141 | rc = -ENOMEM; |
| 2142 | |
| 2143 | out: |
| 2144 | if (rc) { |
Dan Williams | a2d1c7a | 2019-09-05 21:15:57 +0530 | [diff] [blame] | 2145 | deactivate_labels(nd_region); |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2146 | return rc; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2147 | } |
| 2148 | |
Dan Williams | a2d1c7a | 2019-09-05 21:15:57 +0530 | [diff] [blame] | 2149 | return devm_add_action_or_reset(&nd_region->dev, deactivate_labels, |
Dan Williams | d9cee9f | 2021-07-30 09:46:04 -0700 | [diff] [blame] | 2150 | nd_region); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2151 | } |
| 2152 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2153 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
| 2154 | { |
| 2155 | struct device **devs = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2156 | int i, rc = 0, type; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2157 | |
| 2158 | *err = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2159 | nvdimm_bus_lock(&nd_region->dev); |
| 2160 | rc = init_active_labels(nd_region); |
| 2161 | if (rc) { |
| 2162 | nvdimm_bus_unlock(&nd_region->dev); |
| 2163 | return rc; |
| 2164 | } |
| 2165 | |
| 2166 | type = nd_region_to_nstype(nd_region); |
| 2167 | switch (type) { |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2168 | case ND_DEVICE_NAMESPACE_IO: |
| 2169 | devs = create_namespace_io(nd_region); |
| 2170 | break; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2171 | case ND_DEVICE_NAMESPACE_PMEM: |
Dan Williams | 8a5f50d | 2016-09-22 15:42:59 -0700 | [diff] [blame] | 2172 | devs = create_namespaces(nd_region); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2173 | break; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2174 | default: |
| 2175 | break; |
| 2176 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 2177 | nvdimm_bus_unlock(&nd_region->dev); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2178 | |
| 2179 | if (!devs) |
| 2180 | return -ENODEV; |
| 2181 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2182 | for (i = 0; devs[i]; i++) { |
| 2183 | struct device *dev = devs[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2184 | int id; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2185 | |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 2186 | if (type == ND_DEVICE_NAMESPACE_PMEM) { |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 2187 | struct nd_namespace_pmem *nspm; |
| 2188 | |
| 2189 | nspm = to_nd_namespace_pmem(dev); |
| 2190 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, |
Dan Williams | 84bd369 | 2022-03-09 19:49:37 -0800 | [diff] [blame] | 2191 | GFP_KERNEL); |
Dan Williams | 0e3b0d1 | 2016-10-06 23:13:15 -0700 | [diff] [blame] | 2192 | nspm->id = id; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2193 | } else |
| 2194 | id = i; |
| 2195 | |
| 2196 | if (id < 0) |
| 2197 | break; |
| 2198 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); |
Dan Williams | 4a0079b | 2022-04-21 08:33:29 -0700 | [diff] [blame] | 2199 | device_initialize(dev); |
| 2200 | lockdep_set_class(&dev->mutex, &nvdimm_namespace_key); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2201 | nd_device_register(dev); |
| 2202 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2203 | if (i) |
| 2204 | nd_region->ns_seed = devs[0]; |
| 2205 | |
| 2206 | if (devs[i]) { |
| 2207 | int j; |
| 2208 | |
| 2209 | for (j = i; devs[j]; j++) { |
| 2210 | struct device *dev = devs[j]; |
| 2211 | |
| 2212 | device_initialize(dev); |
| 2213 | put_device(dev); |
| 2214 | } |
| 2215 | *err = j - i; |
| 2216 | /* |
| 2217 | * All of the namespaces we tried to register failed, so |
| 2218 | * fail region activation. |
| 2219 | */ |
| 2220 | if (*err == 0) |
| 2221 | rc = -ENODEV; |
| 2222 | } |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2223 | kfree(devs); |
| 2224 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 2225 | if (rc == -ENODEV) |
| 2226 | return rc; |
| 2227 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 2228 | return i; |
| 2229 | } |