drivers/acpi/nfit/intel.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2018 Intel Corporation. All rights reserved. */
   3 #include <linux/libnvdimm.h>
   4 #include <linux/ndctl.h>
   5 #include <linux/acpi.h>
   6 #include <linux/memregion.h>
   7 #include <asm/smp.h>
   8 #include "intel.h"
   9 #include "nfit.h"
  10
  11 static ssize_t firmware_activate_noidle_show(struct device *dev,
  12                 struct device_attribute *attr, char *buf)
  13 {
  14         struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
  15         struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
  16         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
  17
  18         return sprintf(buf, "%s\n", acpi_desc->fwa_noidle ? "Y" : "N");
  19 }
  20
  21 static ssize_t firmware_activate_noidle_store(struct device *dev,
  22                 struct device_attribute *attr, const char *buf, size_t size)
  23 {
  24         struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
  25         struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
  26         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
  27         ssize_t rc;
  28         bool val;
  29
  30         rc = kstrtobool(buf, &val);
  31         if (rc)
  32                 return rc;
  33         if (val != acpi_desc->fwa_noidle)
  34                 acpi_desc->fwa_cap = NVDIMM_FWA_CAP_INVALID;
  35         acpi_desc->fwa_noidle = val;
  36         return size;
  37 }
  38 DEVICE_ATTR_RW(firmware_activate_noidle);
  39
  40 bool intel_fwa_supported(struct nvdimm_bus *nvdimm_bus)
  41 {
  42         struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
  43         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
  44         unsigned long *mask;
  45
  46         if (!test_bit(NVDIMM_BUS_FAMILY_INTEL, &nd_desc->bus_family_mask))
  47                 return false;
  48
  49         mask = &acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL];
  50         return *mask == NVDIMM_BUS_INTEL_FW_ACTIVATE_CMDMASK;
  51 }
  52
  53 static unsigned long intel_security_flags(struct nvdimm *nvdimm,
  54                 enum nvdimm_passphrase_type ptype)
  55 {
  56         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
  57         unsigned long security_flags = 0;
  58         struct {
  59                 struct nd_cmd_pkg pkg;
  60                 struct nd_intel_get_security_state cmd;
  61         } nd_cmd = {
  62                 .pkg = {
  63                         .nd_command = NVDIMM_INTEL_GET_SECURITY_STATE,
  64                         .nd_family = NVDIMM_FAMILY_INTEL,
  65                         .nd_size_out =
  66                                 sizeof(struct nd_intel_get_security_state),
  67                         .nd_fw_size =
  68                                 sizeof(struct nd_intel_get_security_state),
  69                 },
  70         };
  71         int rc;
  72
  73         if (!test_bit(NVDIMM_INTEL_GET_SECURITY_STATE, &nfit_mem->dsm_mask))
  74                 return 0;
  75
  76         /*
  77          * Short circuit the state retrieval while we are doing overwrite.
  78          * The DSM spec states that the security state is indeterminate
  79          * until the overwrite DSM completes.
  80          */
  81         if (nvdimm_in_overwrite(nvdimm) && ptype == NVDIMM_USER)
  82                 return BIT(NVDIMM_SECURITY_OVERWRITE);
  83
  84         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
  85         if (rc < 0 || nd_cmd.cmd.status) {
  86                 pr_err("%s: security state retrieval failed (%d:%#x)\n",
  87                                 nvdimm_name(nvdimm), rc, nd_cmd.cmd.status);
  88                 return 0;
  89         }
  90
  91         /* check and see if security is enabled and locked */
  92         if (ptype == NVDIMM_MASTER) {
  93                 if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_ENABLED)
  94                         set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
  95                 else
  96                         set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
  97                 if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_PLIMIT)
  98                         set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
  99                 return security_flags;
 100         }
 101
 102         if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED)
 103                 return 0;
 104
 105         if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) {
 106                 if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN ||
 107                     nd_cmd.cmd.state & ND_INTEL_SEC_STATE_PLIMIT)
 108                         set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
 109
 110                 if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED)
 111                         set_bit(NVDIMM_SECURITY_LOCKED, &security_flags);
 112                 else
 113                         set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
 114         } else
 115                 set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
 116
 117         return security_flags;
 118 }
 119
 120 static int intel_security_freeze(struct nvdimm *nvdimm)
 121 {
 122         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 123         struct {
 124                 struct nd_cmd_pkg pkg;
 125                 struct nd_intel_freeze_lock cmd;
 126         } nd_cmd = {
 127                 .pkg = {
 128                         .nd_command = NVDIMM_INTEL_FREEZE_LOCK,
 129                         .nd_family = NVDIMM_FAMILY_INTEL,
 130                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 131                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 132                 },
 133         };
 134         int rc;
 135
 136         if (!test_bit(NVDIMM_INTEL_FREEZE_LOCK, &nfit_mem->dsm_mask))
 137                 return -ENOTTY;
 138
 139         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 140         if (rc < 0)
 141                 return rc;
 142         if (nd_cmd.cmd.status)
 143                 return -EIO;
 144         return 0;
 145 }
 146
 147 static int intel_security_change_key(struct nvdimm *nvdimm,
 148                 const struct nvdimm_key_data *old_data,
 149                 const struct nvdimm_key_data *new_data,
 150                 enum nvdimm_passphrase_type ptype)
 151 {
 152         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 153         unsigned int cmd = ptype == NVDIMM_MASTER ?
 154                 NVDIMM_INTEL_SET_MASTER_PASSPHRASE :
 155                 NVDIMM_INTEL_SET_PASSPHRASE;
 156         struct {
 157                 struct nd_cmd_pkg pkg;
 158                 struct nd_intel_set_passphrase cmd;
 159         } nd_cmd = {
 160                 .pkg = {
 161                         .nd_family = NVDIMM_FAMILY_INTEL,
 162                         .nd_size_in = ND_INTEL_PASSPHRASE_SIZE * 2,
 163                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 164                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 165                         .nd_command = cmd,
 166                 },
 167         };
 168         int rc;
 169
 170         if (!test_bit(cmd, &nfit_mem->dsm_mask))
 171                 return -ENOTTY;
 172
 173         memcpy(nd_cmd.cmd.old_pass, old_data->data,
 174                         sizeof(nd_cmd.cmd.old_pass));
 175         memcpy(nd_cmd.cmd.new_pass, new_data->data,
 176                         sizeof(nd_cmd.cmd.new_pass));
 177         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 178         if (rc < 0)
 179                 return rc;
 180
 181         switch (nd_cmd.cmd.status) {
 182         case 0:
 183                 return 0;
 184         case ND_INTEL_STATUS_INVALID_PASS:
 185                 return -EINVAL;
 186         case ND_INTEL_STATUS_NOT_SUPPORTED:
 187                 return -EOPNOTSUPP;
 188         case ND_INTEL_STATUS_INVALID_STATE:
 189         default:
 190                 return -EIO;
 191         }
 192 }
 193
 194 static int __maybe_unused intel_security_unlock(struct nvdimm *nvdimm,
 195                 const struct nvdimm_key_data *key_data)
 196 {
 197         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 198         struct {
 199                 struct nd_cmd_pkg pkg;
 200                 struct nd_intel_unlock_unit cmd;
 201         } nd_cmd = {
 202                 .pkg = {
 203                         .nd_command = NVDIMM_INTEL_UNLOCK_UNIT,
 204                         .nd_family = NVDIMM_FAMILY_INTEL,
 205                         .nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
 206                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 207                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 208                 },
 209         };
 210         int rc;
 211
 212         if (!test_bit(NVDIMM_INTEL_UNLOCK_UNIT, &nfit_mem->dsm_mask))
 213                 return -ENOTTY;
 214
 215         memcpy(nd_cmd.cmd.passphrase, key_data->data,
 216                         sizeof(nd_cmd.cmd.passphrase));
 217         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 218         if (rc < 0)
 219                 return rc;
 220         switch (nd_cmd.cmd.status) {
 221         case 0:
 222                 break;
 223         case ND_INTEL_STATUS_INVALID_PASS:
 224                 return -EINVAL;
 225         default:
 226                 return -EIO;
 227         }
 228
 229         return 0;
 230 }
 231
 232 static int intel_security_disable(struct nvdimm *nvdimm,
 233                 const struct nvdimm_key_data *key_data)
 234 {
 235         int rc;
 236         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 237         struct {
 238                 struct nd_cmd_pkg pkg;
 239                 struct nd_intel_disable_passphrase cmd;
 240         } nd_cmd = {
 241                 .pkg = {
 242                         .nd_command = NVDIMM_INTEL_DISABLE_PASSPHRASE,
 243                         .nd_family = NVDIMM_FAMILY_INTEL,
 244                         .nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
 245                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 246                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 247                 },
 248         };
 249
 250         if (!test_bit(NVDIMM_INTEL_DISABLE_PASSPHRASE, &nfit_mem->dsm_mask))
 251                 return -ENOTTY;
 252
 253         memcpy(nd_cmd.cmd.passphrase, key_data->data,
 254                         sizeof(nd_cmd.cmd.passphrase));
 255         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 256         if (rc < 0)
 257                 return rc;
 258
 259         switch (nd_cmd.cmd.status) {
 260         case 0:
 261                 break;
 262         case ND_INTEL_STATUS_INVALID_PASS:
 263                 return -EINVAL;
 264         case ND_INTEL_STATUS_INVALID_STATE:
 265         default:
 266                 return -ENXIO;
 267         }
 268
 269         return 0;
 270 }
 271
 272 static int __maybe_unused intel_security_erase(struct nvdimm *nvdimm,
 273                 const struct nvdimm_key_data *key,
 274                 enum nvdimm_passphrase_type ptype)
 275 {
 276         int rc;
 277         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 278         unsigned int cmd = ptype == NVDIMM_MASTER ?
 279                 NVDIMM_INTEL_MASTER_SECURE_ERASE : NVDIMM_INTEL_SECURE_ERASE;
 280         struct {
 281                 struct nd_cmd_pkg pkg;
 282                 struct nd_intel_secure_erase cmd;
 283         } nd_cmd = {
 284                 .pkg = {
 285                         .nd_family = NVDIMM_FAMILY_INTEL,
 286                         .nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
 287                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 288                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 289                         .nd_command = cmd,
 290                 },
 291         };
 292
 293         if (!test_bit(cmd, &nfit_mem->dsm_mask))
 294                 return -ENOTTY;
 295
 296         memcpy(nd_cmd.cmd.passphrase, key->data,
 297                         sizeof(nd_cmd.cmd.passphrase));
 298         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 299         if (rc < 0)
 300                 return rc;
 301
 302         switch (nd_cmd.cmd.status) {
 303         case 0:
 304                 break;
 305         case ND_INTEL_STATUS_NOT_SUPPORTED:
 306                 return -EOPNOTSUPP;
 307         case ND_INTEL_STATUS_INVALID_PASS:
 308                 return -EINVAL;
 309         case ND_INTEL_STATUS_INVALID_STATE:
 310         default:
 311                 return -ENXIO;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static int __maybe_unused intel_security_query_overwrite(struct nvdimm *nvdimm)
 318 {
 319         int rc;
 320         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 321         struct {
 322                 struct nd_cmd_pkg pkg;
 323                 struct nd_intel_query_overwrite cmd;
 324         } nd_cmd = {
 325                 .pkg = {
 326                         .nd_command = NVDIMM_INTEL_QUERY_OVERWRITE,
 327                         .nd_family = NVDIMM_FAMILY_INTEL,
 328                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 329                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 330                 },
 331         };
 332
 333         if (!test_bit(NVDIMM_INTEL_QUERY_OVERWRITE, &nfit_mem->dsm_mask))
 334                 return -ENOTTY;
 335
 336         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 337         if (rc < 0)
 338                 return rc;
 339
 340         switch (nd_cmd.cmd.status) {
 341         case 0:
 342                 break;
 343         case ND_INTEL_STATUS_OQUERY_INPROGRESS:
 344                 return -EBUSY;
 345         default:
 346                 return -ENXIO;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static int __maybe_unused intel_security_overwrite(struct nvdimm *nvdimm,
 353                 const struct nvdimm_key_data *nkey)
 354 {
 355         int rc;
 356         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 357         struct {
 358                 struct nd_cmd_pkg pkg;
 359                 struct nd_intel_overwrite cmd;
 360         } nd_cmd = {
 361                 .pkg = {
 362                         .nd_command = NVDIMM_INTEL_OVERWRITE,
 363                         .nd_family = NVDIMM_FAMILY_INTEL,
 364                         .nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
 365                         .nd_size_out = ND_INTEL_STATUS_SIZE,
 366                         .nd_fw_size = ND_INTEL_STATUS_SIZE,
 367                 },
 368         };
 369
 370         if (!test_bit(NVDIMM_INTEL_OVERWRITE, &nfit_mem->dsm_mask))
 371                 return -ENOTTY;
 372
 373         memcpy(nd_cmd.cmd.passphrase, nkey->data,
 374                         sizeof(nd_cmd.cmd.passphrase));
 375         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 376         if (rc < 0)
 377                 return rc;
 378
 379         switch (nd_cmd.cmd.status) {
 380         case 0:
 381                 return 0;
 382         case ND_INTEL_STATUS_OVERWRITE_UNSUPPORTED:
 383                 return -ENOTSUPP;
 384         case ND_INTEL_STATUS_INVALID_PASS:
 385                 return -EINVAL;
 386         case ND_INTEL_STATUS_INVALID_STATE:
 387         default:
 388                 return -ENXIO;
 389         }
 390 }
 391
 392 static const struct nvdimm_security_ops __intel_security_ops = {
 393         .get_flags = intel_security_flags,
 394         .freeze = intel_security_freeze,
 395         .change_key = intel_security_change_key,
 396         .disable = intel_security_disable,
 397 #ifdef CONFIG_X86
 398         .unlock = intel_security_unlock,
 399         .erase = intel_security_erase,
 400         .overwrite = intel_security_overwrite,
 401         .query_overwrite = intel_security_query_overwrite,
 402 #endif
 403 };
 404
 405 const struct nvdimm_security_ops *intel_security_ops = &__intel_security_ops;
 406
 407 static int intel_bus_fwa_businfo(struct nvdimm_bus_descriptor *nd_desc,
 408                 struct nd_intel_bus_fw_activate_businfo *info)
 409 {
 410         struct {
 411                 struct nd_cmd_pkg pkg;
 412                 struct nd_intel_bus_fw_activate_businfo cmd;
 413         } nd_cmd = {
 414                 .pkg = {
 415                         .nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE_BUSINFO,
 416                         .nd_family = NVDIMM_BUS_FAMILY_INTEL,
 417                         .nd_size_out =
 418                                 sizeof(struct nd_intel_bus_fw_activate_businfo),
 419                         .nd_fw_size =
 420                                 sizeof(struct nd_intel_bus_fw_activate_businfo),
 421                 },
 422         };
 423         int rc;
 424
 425         rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd),
 426                         NULL);
 427         *info = nd_cmd.cmd;
 428         return rc;
 429 }
 430
 431 /* The fw_ops expect to be called with the nvdimm_bus_lock() held */
 432 static enum nvdimm_fwa_state intel_bus_fwa_state(
 433                 struct nvdimm_bus_descriptor *nd_desc)
 434 {
 435         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 436         struct nd_intel_bus_fw_activate_businfo info;
 437         struct device *dev = acpi_desc->dev;
 438         enum nvdimm_fwa_state state;
 439         int rc;
 440
 441         /*
 442          * It should not be possible for platform firmware to return
 443          * busy because activate is a synchronous operation. Treat it
 444          * similar to invalid, i.e. always refresh / poll the status.
 445          */
 446         switch (acpi_desc->fwa_state) {
 447         case NVDIMM_FWA_INVALID:
 448         case NVDIMM_FWA_BUSY:
 449                 break;
 450         default:
 451                 /* check if capability needs to be refreshed */
 452                 if (acpi_desc->fwa_cap == NVDIMM_FWA_CAP_INVALID)
 453                         break;
 454                 return acpi_desc->fwa_state;
 455         }
 456
 457         /* Refresh with platform firmware */
 458         rc = intel_bus_fwa_businfo(nd_desc, &info);
 459         if (rc)
 460                 return NVDIMM_FWA_INVALID;
 461
 462         switch (info.state) {
 463         case ND_INTEL_FWA_IDLE:
 464                 state = NVDIMM_FWA_IDLE;
 465                 break;
 466         case ND_INTEL_FWA_BUSY:
 467                 state = NVDIMM_FWA_BUSY;
 468                 break;
 469         case ND_INTEL_FWA_ARMED:
 470                 if (info.activate_tmo > info.max_quiesce_tmo)
 471                         state = NVDIMM_FWA_ARM_OVERFLOW;
 472                 else
 473                         state = NVDIMM_FWA_ARMED;
 474                 break;
 475         default:
 476                 dev_err_once(dev, "invalid firmware activate state %d\n",
 477                                 info.state);
 478                 return NVDIMM_FWA_INVALID;
 479         }
 480
 481         /*
 482          * Capability data is available in the same payload as state. It
 483          * is expected to be static.
 484          */
 485         if (acpi_desc->fwa_cap == NVDIMM_FWA_CAP_INVALID) {
 486                 if (info.capability & ND_INTEL_BUS_FWA_CAP_FWQUIESCE)
 487                         acpi_desc->fwa_cap = NVDIMM_FWA_CAP_QUIESCE;
 488                 else if (info.capability & ND_INTEL_BUS_FWA_CAP_OSQUIESCE) {
 489                         /*
 490                          * Skip hibernate cycle by default if platform
 491                          * indicates that it does not need devices to be
 492                          * quiesced.
 493                          */
 494                         acpi_desc->fwa_cap = NVDIMM_FWA_CAP_LIVE;
 495                 } else
 496                         acpi_desc->fwa_cap = NVDIMM_FWA_CAP_NONE;
 497         }
 498
 499         acpi_desc->fwa_state = state;
 500
 501         return state;
 502 }
 503
 504 static enum nvdimm_fwa_capability intel_bus_fwa_capability(
 505                 struct nvdimm_bus_descriptor *nd_desc)
 506 {
 507         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 508
 509         if (acpi_desc->fwa_cap > NVDIMM_FWA_CAP_INVALID)
 510                 return acpi_desc->fwa_cap;
 511
 512         if (intel_bus_fwa_state(nd_desc) > NVDIMM_FWA_INVALID)
 513                 return acpi_desc->fwa_cap;
 514
 515         return NVDIMM_FWA_CAP_INVALID;
 516 }
 517
 518 static int intel_bus_fwa_activate(struct nvdimm_bus_descriptor *nd_desc)
 519 {
 520         struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
 521         struct {
 522                 struct nd_cmd_pkg pkg;
 523                 struct nd_intel_bus_fw_activate cmd;
 524         } nd_cmd = {
 525                 .pkg = {
 526                         .nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE,
 527                         .nd_family = NVDIMM_BUS_FAMILY_INTEL,
 528                         .nd_size_in = sizeof(nd_cmd.cmd.iodev_state),
 529                         .nd_size_out =
 530                                 sizeof(struct nd_intel_bus_fw_activate),
 531                         .nd_fw_size =
 532                                 sizeof(struct nd_intel_bus_fw_activate),
 533                 },
 534                 /*
 535                  * Even though activate is run from a suspended context,
 536                  * for safety, still ask platform firmware to force
 537                  * quiesce devices by default. Let a module
 538                  * parameter override that policy.
 539                  */
 540                 .cmd = {
 541                         .iodev_state = acpi_desc->fwa_noidle
 542                                 ? ND_INTEL_BUS_FWA_IODEV_OS_IDLE
 543                                 : ND_INTEL_BUS_FWA_IODEV_FORCE_IDLE,
 544                 },
 545         };
 546         int rc;
 547
 548         switch (intel_bus_fwa_state(nd_desc)) {
 549         case NVDIMM_FWA_ARMED:
 550         case NVDIMM_FWA_ARM_OVERFLOW:
 551                 break;
 552         default:
 553                 return -ENXIO;
 554         }
 555
 556         rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd),
 557                         NULL);
 558
 559         /*
 560          * Whether the command succeeded, or failed, the agent checking
 561          * for the result needs to query the DIMMs individually.
 562          * Increment the activation count to invalidate all the DIMM
 563          * states at once (it's otherwise not possible to take
 564          * acpi_desc->init_mutex in this context)
 565          */
 566         acpi_desc->fwa_state = NVDIMM_FWA_INVALID;
 567         acpi_desc->fwa_count++;
 568
 569         dev_dbg(acpi_desc->dev, "result: %d\n", rc);
 570
 571         return rc;
 572 }
 573
 574 static const struct nvdimm_bus_fw_ops __intel_bus_fw_ops = {
 575         .activate_state = intel_bus_fwa_state,
 576         .capability = intel_bus_fwa_capability,
 577         .activate = intel_bus_fwa_activate,
 578 };
 579
 580 const struct nvdimm_bus_fw_ops *intel_bus_fw_ops = &__intel_bus_fw_ops;
 581
 582 static int intel_fwa_dimminfo(struct nvdimm *nvdimm,
 583                 struct nd_intel_fw_activate_dimminfo *info)
 584 {
 585         struct {
 586                 struct nd_cmd_pkg pkg;
 587                 struct nd_intel_fw_activate_dimminfo cmd;
 588         } nd_cmd = {
 589                 .pkg = {
 590                         .nd_command = NVDIMM_INTEL_FW_ACTIVATE_DIMMINFO,
 591                         .nd_family = NVDIMM_FAMILY_INTEL,
 592                         .nd_size_out =
 593                                 sizeof(struct nd_intel_fw_activate_dimminfo),
 594                         .nd_fw_size =
 595                                 sizeof(struct nd_intel_fw_activate_dimminfo),
 596                 },
 597         };
 598         int rc;
 599
 600         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 601         *info = nd_cmd.cmd;
 602         return rc;
 603 }
 604
 605 static enum nvdimm_fwa_state intel_fwa_state(struct nvdimm *nvdimm)
 606 {
 607         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 608         struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
 609         struct nd_intel_fw_activate_dimminfo info;
 610         int rc;
 611
 612         /*
 613          * Similar to the bus state, since activate is synchronous the
 614          * busy state should resolve within the context of 'activate'.
 615          */
 616         switch (nfit_mem->fwa_state) {
 617         case NVDIMM_FWA_INVALID:
 618         case NVDIMM_FWA_BUSY:
 619                 break;
 620         default:
 621                 /* If no activations occurred the old state is still valid */
 622                 if (nfit_mem->fwa_count == acpi_desc->fwa_count)
 623                         return nfit_mem->fwa_state;
 624         }
 625
 626         rc = intel_fwa_dimminfo(nvdimm, &info);
 627         if (rc)
 628                 return NVDIMM_FWA_INVALID;
 629
 630         switch (info.state) {
 631         case ND_INTEL_FWA_IDLE:
 632                 nfit_mem->fwa_state = NVDIMM_FWA_IDLE;
 633                 break;
 634         case ND_INTEL_FWA_BUSY:
 635                 nfit_mem->fwa_state = NVDIMM_FWA_BUSY;
 636                 break;
 637         case ND_INTEL_FWA_ARMED:
 638                 nfit_mem->fwa_state = NVDIMM_FWA_ARMED;
 639                 break;
 640         default:
 641                 nfit_mem->fwa_state = NVDIMM_FWA_INVALID;
 642                 break;
 643         }
 644
 645         switch (info.result) {
 646         case ND_INTEL_DIMM_FWA_NONE:
 647                 nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NONE;
 648                 break;
 649         case ND_INTEL_DIMM_FWA_SUCCESS:
 650                 nfit_mem->fwa_result = NVDIMM_FWA_RESULT_SUCCESS;
 651                 break;
 652         case ND_INTEL_DIMM_FWA_NOTSTAGED:
 653                 nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NOTSTAGED;
 654                 break;
 655         case ND_INTEL_DIMM_FWA_NEEDRESET:
 656                 nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NEEDRESET;
 657                 break;
 658         case ND_INTEL_DIMM_FWA_MEDIAFAILED:
 659         case ND_INTEL_DIMM_FWA_ABORT:
 660         case ND_INTEL_DIMM_FWA_NOTSUPP:
 661         case ND_INTEL_DIMM_FWA_ERROR:
 662         default:
 663                 nfit_mem->fwa_result = NVDIMM_FWA_RESULT_FAIL;
 664                 break;
 665         }
 666
 667         nfit_mem->fwa_count = acpi_desc->fwa_count;
 668
 669         return nfit_mem->fwa_state;
 670 }
 671
 672 static enum nvdimm_fwa_result intel_fwa_result(struct nvdimm *nvdimm)
 673 {
 674         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 675         struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
 676
 677         if (nfit_mem->fwa_count == acpi_desc->fwa_count
 678                         && nfit_mem->fwa_result > NVDIMM_FWA_RESULT_INVALID)
 679                 return nfit_mem->fwa_result;
 680
 681         if (intel_fwa_state(nvdimm) > NVDIMM_FWA_INVALID)
 682                 return nfit_mem->fwa_result;
 683
 684         return NVDIMM_FWA_RESULT_INVALID;
 685 }
 686
 687 static int intel_fwa_arm(struct nvdimm *nvdimm, enum nvdimm_fwa_trigger arm)
 688 {
 689         struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 690         struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
 691         struct {
 692                 struct nd_cmd_pkg pkg;
 693                 struct nd_intel_fw_activate_arm cmd;
 694         } nd_cmd = {
 695                 .pkg = {
 696                         .nd_command = NVDIMM_INTEL_FW_ACTIVATE_ARM,
 697                         .nd_family = NVDIMM_FAMILY_INTEL,
 698                         .nd_size_in = sizeof(nd_cmd.cmd.activate_arm),
 699                         .nd_size_out =
 700                                 sizeof(struct nd_intel_fw_activate_arm),
 701                         .nd_fw_size =
 702                                 sizeof(struct nd_intel_fw_activate_arm),
 703                 },
 704                 .cmd = {
 705                         .activate_arm = arm == NVDIMM_FWA_ARM
 706                                 ? ND_INTEL_DIMM_FWA_ARM
 707                                 : ND_INTEL_DIMM_FWA_DISARM,
 708                 },
 709         };
 710         int rc;
 711
 712         switch (intel_fwa_state(nvdimm)) {
 713         case NVDIMM_FWA_INVALID:
 714                 return -ENXIO;
 715         case NVDIMM_FWA_BUSY:
 716                 return -EBUSY;
 717         case NVDIMM_FWA_IDLE:
 718                 if (arm == NVDIMM_FWA_DISARM)
 719                         return 0;
 720                 break;
 721         case NVDIMM_FWA_ARMED:
 722                 if (arm == NVDIMM_FWA_ARM)
 723                         return 0;
 724                 break;
 725         default:
 726                 return -ENXIO;
 727         }
 728
 729         /*
 730          * Invalidate the bus-level state, now that we're committed to
 731          * changing the 'arm' state.
 732          */
 733         acpi_desc->fwa_state = NVDIMM_FWA_INVALID;
 734         nfit_mem->fwa_state = NVDIMM_FWA_INVALID;
 735
 736         rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
 737
 738         dev_dbg(acpi_desc->dev, "%s result: %d\n", arm == NVDIMM_FWA_ARM
 739                         ? "arm" : "disarm", rc);
 740         return rc;
 741 }
 742
 743 static const struct nvdimm_fw_ops __intel_fw_ops = {
 744         .activate_state = intel_fwa_state,
 745         .activate_result = intel_fwa_result,
 746         .arm = intel_fwa_arm,
 747 };
 748
 749 const struct nvdimm_fw_ops *intel_fw_ops = &__intel_fw_ops;