drivers/net/ethernet/intel/ice/ice_devlink.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2020, Intel Corporation. */
   3
   4 #include "ice.h"
   5 #include "ice_lib.h"
   6 #include "ice_devlink.h"
   7 #include "ice_fw_update.h"
   8
   9 /* context for devlink info version reporting */
  10 struct ice_info_ctx {
  11         char buf[128];
  12         struct ice_orom_info pending_orom;
  13         struct ice_nvm_info pending_nvm;
  14         struct ice_netlist_info pending_netlist;
  15         struct ice_hw_dev_caps dev_caps;
  16 };
  17
  18 /* The following functions are used to format specific strings for various
  19  * devlink info versions. The ctx parameter is used to provide the storage
  20  * buffer, as well as any ancillary information calculated when the info
  21  * request was made.
  22  *
  23  * If a version does not exist, for example when attempting to get the
  24  * inactive version of flash when there is no pending update, the function
  25  * should leave the buffer in the ctx structure empty and return 0.
  26  */
  27
  28 static void ice_info_get_dsn(struct ice_pf *pf, struct ice_info_ctx *ctx)
  29 {
  30         u8 dsn[8];
  31
  32         /* Copy the DSN into an array in Big Endian format */
  33         put_unaligned_be64(pci_get_dsn(pf->pdev), dsn);
  34
  35         snprintf(ctx->buf, sizeof(ctx->buf), "%8phD", dsn);
  36 }
  37
  38 static int ice_info_pba(struct ice_pf *pf, struct ice_info_ctx *ctx)
  39 {
  40         struct ice_hw *hw = &pf->hw;
  41         enum ice_status status;
  42
  43         status = ice_read_pba_string(hw, (u8 *)ctx->buf, sizeof(ctx->buf));
  44         if (status)
  45                 /* We failed to locate the PBA, so just skip this entry */
  46                 dev_dbg(ice_pf_to_dev(pf), "Failed to read Product Board Assembly string, status %s\n",
  47                         ice_stat_str(status));
  48
  49         return 0;
  50 }
  51
  52 static int ice_info_fw_mgmt(struct ice_pf *pf, struct ice_info_ctx *ctx)
  53 {
  54         struct ice_hw *hw = &pf->hw;
  55
  56         snprintf(ctx->buf, sizeof(ctx->buf), "%u.%u.%u", hw->fw_maj_ver, hw->fw_min_ver,
  57                  hw->fw_patch);
  58
  59         return 0;
  60 }
  61
  62 static int ice_info_fw_api(struct ice_pf *pf, struct ice_info_ctx *ctx)
  63 {
  64         struct ice_hw *hw = &pf->hw;
  65
  66         snprintf(ctx->buf, sizeof(ctx->buf), "%u.%u", hw->api_maj_ver, hw->api_min_ver);
  67
  68         return 0;
  69 }
  70
  71 static int ice_info_fw_build(struct ice_pf *pf, struct ice_info_ctx *ctx)
  72 {
  73         struct ice_hw *hw = &pf->hw;
  74
  75         snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", hw->fw_build);
  76
  77         return 0;
  78 }
  79
  80 static int ice_info_orom_ver(struct ice_pf *pf, struct ice_info_ctx *ctx)
  81 {
  82         struct ice_orom_info *orom = &pf->hw.flash.orom;
  83
  84         snprintf(ctx->buf, sizeof(ctx->buf), "%u.%u.%u", orom->major, orom->build, orom->patch);
  85
  86         return 0;
  87 }
  88
  89 static int
  90 ice_info_pending_orom_ver(struct ice_pf __always_unused *pf, struct ice_info_ctx *ctx)
  91 {
  92         struct ice_orom_info *orom = &ctx->pending_orom;
  93
  94         if (ctx->dev_caps.common_cap.nvm_update_pending_orom)
  95                 snprintf(ctx->buf, sizeof(ctx->buf), "%u.%u.%u",
  96                          orom->major, orom->build, orom->patch);
  97
  98         return 0;
  99 }
 100
 101 static int ice_info_nvm_ver(struct ice_pf *pf, struct ice_info_ctx *ctx)
 102 {
 103         struct ice_nvm_info *nvm = &pf->hw.flash.nvm;
 104
 105         snprintf(ctx->buf, sizeof(ctx->buf), "%x.%02x", nvm->major, nvm->minor);
 106
 107         return 0;
 108 }
 109
 110 static int
 111 ice_info_pending_nvm_ver(struct ice_pf __always_unused *pf, struct ice_info_ctx *ctx)
 112 {
 113         struct ice_nvm_info *nvm = &ctx->pending_nvm;
 114
 115         if (ctx->dev_caps.common_cap.nvm_update_pending_nvm)
 116                 snprintf(ctx->buf, sizeof(ctx->buf), "%x.%02x", nvm->major, nvm->minor);
 117
 118         return 0;
 119 }
 120
 121 static int ice_info_eetrack(struct ice_pf *pf, struct ice_info_ctx *ctx)
 122 {
 123         struct ice_nvm_info *nvm = &pf->hw.flash.nvm;
 124
 125         snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", nvm->eetrack);
 126
 127         return 0;
 128 }
 129
 130 static int
 131 ice_info_pending_eetrack(struct ice_pf __always_unused *pf, struct ice_info_ctx *ctx)
 132 {
 133         struct ice_nvm_info *nvm = &ctx->pending_nvm;
 134
 135         if (ctx->dev_caps.common_cap.nvm_update_pending_nvm)
 136                 snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", nvm->eetrack);
 137
 138         return 0;
 139 }
 140
 141 static int ice_info_ddp_pkg_name(struct ice_pf *pf, struct ice_info_ctx *ctx)
 142 {
 143         struct ice_hw *hw = &pf->hw;
 144
 145         snprintf(ctx->buf, sizeof(ctx->buf), "%s", hw->active_pkg_name);
 146
 147         return 0;
 148 }
 149
 150 static int ice_info_ddp_pkg_version(struct ice_pf *pf, struct ice_info_ctx *ctx)
 151 {
 152         struct ice_pkg_ver *pkg = &pf->hw.active_pkg_ver;
 153
 154         snprintf(ctx->buf, sizeof(ctx->buf), "%u.%u.%u.%u", pkg->major, pkg->minor, pkg->update,
 155                  pkg->draft);
 156
 157         return 0;
 158 }
 159
 160 static int ice_info_ddp_pkg_bundle_id(struct ice_pf *pf, struct ice_info_ctx *ctx)
 161 {
 162         snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", pf->hw.active_track_id);
 163
 164         return 0;
 165 }
 166
 167 static int ice_info_netlist_ver(struct ice_pf *pf, struct ice_info_ctx *ctx)
 168 {
 169         struct ice_netlist_info *netlist = &pf->hw.flash.netlist;
 170
 171         /* The netlist version fields are BCD formatted */
 172         snprintf(ctx->buf, sizeof(ctx->buf), "%x.%x.%x-%x.%x.%x", netlist->major, netlist->minor,
 173                  netlist->type >> 16, netlist->type & 0xFFFF, netlist->rev,
 174                  netlist->cust_ver);
 175
 176         return 0;
 177 }
 178
 179 static int ice_info_netlist_build(struct ice_pf *pf, struct ice_info_ctx *ctx)
 180 {
 181         struct ice_netlist_info *netlist = &pf->hw.flash.netlist;
 182
 183         snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", netlist->hash);
 184
 185         return 0;
 186 }
 187
 188 static int
 189 ice_info_pending_netlist_ver(struct ice_pf __always_unused *pf, struct ice_info_ctx *ctx)
 190 {
 191         struct ice_netlist_info *netlist = &ctx->pending_netlist;
 192
 193         /* The netlist version fields are BCD formatted */
 194         if (ctx->dev_caps.common_cap.nvm_update_pending_netlist)
 195                 snprintf(ctx->buf, sizeof(ctx->buf), "%x.%x.%x-%x.%x.%x",
 196                          netlist->major, netlist->minor,
 197                          netlist->type >> 16, netlist->type & 0xFFFF, netlist->rev,
 198                          netlist->cust_ver);
 199
 200         return 0;
 201 }
 202
 203 static int
 204 ice_info_pending_netlist_build(struct ice_pf __always_unused *pf, struct ice_info_ctx *ctx)
 205 {
 206         struct ice_netlist_info *netlist = &ctx->pending_netlist;
 207
 208         if (ctx->dev_caps.common_cap.nvm_update_pending_netlist)
 209                 snprintf(ctx->buf, sizeof(ctx->buf), "0x%08x", netlist->hash);
 210
 211         return 0;
 212 }
 213
 214 #define fixed(key, getter) { ICE_VERSION_FIXED, key, getter, NULL }
 215 #define running(key, getter) { ICE_VERSION_RUNNING, key, getter, NULL }
 216 #define stored(key, getter, fallback) { ICE_VERSION_STORED, key, getter, fallback }
 217
 218 /* The combined() macro inserts both the running entry as well as a stored
 219  * entry. The running entry will always report the version from the active
 220  * handler. The stored entry will first try the pending handler, and fallback
 221  * to the active handler if the pending function does not report a version.
 222  * The pending handler should check the status of a pending update for the
 223  * relevant flash component. It should only fill in the buffer in the case
 224  * where a valid pending version is available. This ensures that the related
 225  * stored and running versions remain in sync, and that stored versions are
 226  * correctly reported as expected.
 227  */
 228 #define combined(key, active, pending) \
 229         running(key, active), \
 230         stored(key, pending, active)
 231
 232 enum ice_version_type {
 233         ICE_VERSION_FIXED,
 234         ICE_VERSION_RUNNING,
 235         ICE_VERSION_STORED,
 236 };
 237
 238 static const struct ice_devlink_version {
 239         enum ice_version_type type;
 240         const char *key;
 241         int (*getter)(struct ice_pf *pf, struct ice_info_ctx *ctx);
 242         int (*fallback)(struct ice_pf *pf, struct ice_info_ctx *ctx);
 243 } ice_devlink_versions[] = {
 244         fixed(DEVLINK_INFO_VERSION_GENERIC_BOARD_ID, ice_info_pba),
 245         running(DEVLINK_INFO_VERSION_GENERIC_FW_MGMT, ice_info_fw_mgmt),
 246         running("fw.mgmt.api", ice_info_fw_api),
 247         running("fw.mgmt.build", ice_info_fw_build),
 248         combined(DEVLINK_INFO_VERSION_GENERIC_FW_UNDI, ice_info_orom_ver, ice_info_pending_orom_ver),
 249         combined("fw.psid.api", ice_info_nvm_ver, ice_info_pending_nvm_ver),
 250         combined(DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID, ice_info_eetrack, ice_info_pending_eetrack),
 251         running("fw.app.name", ice_info_ddp_pkg_name),
 252         running(DEVLINK_INFO_VERSION_GENERIC_FW_APP, ice_info_ddp_pkg_version),
 253         running("fw.app.bundle_id", ice_info_ddp_pkg_bundle_id),
 254         combined("fw.netlist", ice_info_netlist_ver, ice_info_pending_netlist_ver),
 255         combined("fw.netlist.build", ice_info_netlist_build, ice_info_pending_netlist_build),
 256 };
 257
 258 /**
 259  * ice_devlink_info_get - .info_get devlink handler
 260  * @devlink: devlink instance structure
 261  * @req: the devlink info request
 262  * @extack: extended netdev ack structure
 263  *
 264  * Callback for the devlink .info_get operation. Reports information about the
 265  * device.
 266  *
 267  * Return: zero on success or an error code on failure.
 268  */
 269 static int ice_devlink_info_get(struct devlink *devlink,
 270                                 struct devlink_info_req *req,
 271                                 struct netlink_ext_ack *extack)
 272 {
 273         struct ice_pf *pf = devlink_priv(devlink);
 274         struct device *dev = ice_pf_to_dev(pf);
 275         struct ice_hw *hw = &pf->hw;
 276         struct ice_info_ctx *ctx;
 277         enum ice_status status;
 278         size_t i;
 279         int err;
 280
 281         err = ice_wait_for_reset(pf, 10 * HZ);
 282         if (err) {
 283                 NL_SET_ERR_MSG_MOD(extack, "Device is busy resetting");
 284                 return err;
 285         }
 286
 287         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 288         if (!ctx)
 289                 return -ENOMEM;
 290
 291         /* discover capabilities first */
 292         status = ice_discover_dev_caps(hw, &ctx->dev_caps);
 293         if (status) {
 294                 dev_dbg(dev, "Failed to discover device capabilities, status %s aq_err %s\n",
 295                         ice_stat_str(status), ice_aq_str(hw->adminq.sq_last_status));
 296                 NL_SET_ERR_MSG_MOD(extack, "Unable to discover device capabilities");
 297                 err = -EIO;
 298                 goto out_free_ctx;
 299         }
 300
 301         if (ctx->dev_caps.common_cap.nvm_update_pending_orom) {
 302                 status = ice_get_inactive_orom_ver(hw, &ctx->pending_orom);
 303                 if (status) {
 304                         dev_dbg(dev, "Unable to read inactive Option ROM version data, status %s aq_err %s\n",
 305                                 ice_stat_str(status), ice_aq_str(hw->adminq.sq_last_status));
 306
 307                         /* disable display of pending Option ROM */
 308                         ctx->dev_caps.common_cap.nvm_update_pending_orom = false;
 309                 }
 310         }
 311
 312         if (ctx->dev_caps.common_cap.nvm_update_pending_nvm) {
 313                 status = ice_get_inactive_nvm_ver(hw, &ctx->pending_nvm);
 314                 if (status) {
 315                         dev_dbg(dev, "Unable to read inactive NVM version data, status %s aq_err %s\n",
 316                                 ice_stat_str(status), ice_aq_str(hw->adminq.sq_last_status));
 317
 318                         /* disable display of pending Option ROM */
 319                         ctx->dev_caps.common_cap.nvm_update_pending_nvm = false;
 320                 }
 321         }
 322
 323         if (ctx->dev_caps.common_cap.nvm_update_pending_netlist) {
 324                 status = ice_get_inactive_netlist_ver(hw, &ctx->pending_netlist);
 325                 if (status) {
 326                         dev_dbg(dev, "Unable to read inactive Netlist version data, status %s aq_err %s\n",
 327                                 ice_stat_str(status), ice_aq_str(hw->adminq.sq_last_status));
 328
 329                         /* disable display of pending Option ROM */
 330                         ctx->dev_caps.common_cap.nvm_update_pending_netlist = false;
 331                 }
 332         }
 333
 334         err = devlink_info_driver_name_put(req, KBUILD_MODNAME);
 335         if (err) {
 336                 NL_SET_ERR_MSG_MOD(extack, "Unable to set driver name");
 337                 goto out_free_ctx;
 338         }
 339
 340         ice_info_get_dsn(pf, ctx);
 341
 342         err = devlink_info_serial_number_put(req, ctx->buf);
 343         if (err) {
 344                 NL_SET_ERR_MSG_MOD(extack, "Unable to set serial number");
 345                 goto out_free_ctx;
 346         }
 347
 348         for (i = 0; i < ARRAY_SIZE(ice_devlink_versions); i++) {
 349                 enum ice_version_type type = ice_devlink_versions[i].type;
 350                 const char *key = ice_devlink_versions[i].key;
 351
 352                 memset(ctx->buf, 0, sizeof(ctx->buf));
 353
 354                 err = ice_devlink_versions[i].getter(pf, ctx);
 355                 if (err) {
 356                         NL_SET_ERR_MSG_MOD(extack, "Unable to obtain version info");
 357                         goto out_free_ctx;
 358                 }
 359
 360                 /* If the default getter doesn't report a version, use the
 361                  * fallback function. This is primarily useful in the case of
 362                  * "stored" versions that want to report the same value as the
 363                  * running version in the normal case of no pending update.
 364                  */
 365                 if (ctx->buf[0] == '\0' && ice_devlink_versions[i].fallback) {
 366                         err = ice_devlink_versions[i].fallback(pf, ctx);
 367                         if (err) {
 368                                 NL_SET_ERR_MSG_MOD(extack, "Unable to obtain version info");
 369                                 goto out_free_ctx;
 370                         }
 371                 }
 372
 373                 /* Do not report missing versions */
 374                 if (ctx->buf[0] == '\0')
 375                         continue;
 376
 377                 switch (type) {
 378                 case ICE_VERSION_FIXED:
 379                         err = devlink_info_version_fixed_put(req, key, ctx->buf);
 380                         if (err) {
 381                                 NL_SET_ERR_MSG_MOD(extack, "Unable to set fixed version");
 382                                 goto out_free_ctx;
 383                         }
 384                         break;
 385                 case ICE_VERSION_RUNNING:
 386                         err = devlink_info_version_running_put(req, key, ctx->buf);
 387                         if (err) {
 388                                 NL_SET_ERR_MSG_MOD(extack, "Unable to set running version");
 389                                 goto out_free_ctx;
 390                         }
 391                         break;
 392                 case ICE_VERSION_STORED:
 393                         err = devlink_info_version_stored_put(req, key, ctx->buf);
 394                         if (err) {
 395                                 NL_SET_ERR_MSG_MOD(extack, "Unable to set stored version");
 396                                 goto out_free_ctx;
 397                         }
 398                         break;
 399                 }
 400         }
 401
 402 out_free_ctx:
 403         kfree(ctx);
 404         return err;
 405 }
 406
 407 /**
 408  * ice_devlink_flash_update - Update firmware stored in flash on the device
 409  * @devlink: pointer to devlink associated with device to update
 410  * @params: flash update parameters
 411  * @extack: netlink extended ACK structure
 412  *
 413  * Perform a device flash update. The bulk of the update logic is contained
 414  * within the ice_flash_pldm_image function.
 415  *
 416  * Returns: zero on success, or an error code on failure.
 417  */
 418 static int
 419 ice_devlink_flash_update(struct devlink *devlink,
 420                          struct devlink_flash_update_params *params,
 421                          struct netlink_ext_ack *extack)
 422 {
 423         struct ice_pf *pf = devlink_priv(devlink);
 424         struct ice_hw *hw = &pf->hw;
 425         u8 preservation;
 426         int err;
 427
 428         if (!params->overwrite_mask) {
 429                 /* preserve all settings and identifiers */
 430                 preservation = ICE_AQC_NVM_PRESERVE_ALL;
 431         } else if (params->overwrite_mask == DEVLINK_FLASH_OVERWRITE_SETTINGS) {
 432                 /* overwrite settings, but preserve the vital device identifiers */
 433                 preservation = ICE_AQC_NVM_PRESERVE_SELECTED;
 434         } else if (params->overwrite_mask == (DEVLINK_FLASH_OVERWRITE_SETTINGS |
 435                                               DEVLINK_FLASH_OVERWRITE_IDENTIFIERS)) {
 436                 /* overwrite both settings and identifiers, preserve nothing */
 437                 preservation = ICE_AQC_NVM_NO_PRESERVATION;
 438         } else {
 439                 NL_SET_ERR_MSG_MOD(extack, "Requested overwrite mask is not supported");
 440                 return -EOPNOTSUPP;
 441         }
 442
 443         if (!hw->dev_caps.common_cap.nvm_unified_update) {
 444                 NL_SET_ERR_MSG_MOD(extack, "Current firmware does not support unified update");
 445                 return -EOPNOTSUPP;
 446         }
 447
 448         err = ice_check_for_pending_update(pf, NULL, extack);
 449         if (err)
 450                 return err;
 451
 452         devlink_flash_update_status_notify(devlink, "Preparing to flash", NULL, 0, 0);
 453
 454         return ice_flash_pldm_image(pf, params->fw, preservation, extack);
 455 }
 456
 457 static const struct devlink_ops ice_devlink_ops = {
 458         .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
 459         .info_get = ice_devlink_info_get,
 460         .flash_update = ice_devlink_flash_update,
 461 };
 462
 463 static void ice_devlink_free(void *devlink_ptr)
 464 {
 465         devlink_free((struct devlink *)devlink_ptr);
 466 }
 467
 468 /**
 469  * ice_allocate_pf - Allocate devlink and return PF structure pointer
 470  * @dev: the device to allocate for
 471  *
 472  * Allocate a devlink instance for this device and return the private area as
 473  * the PF structure. The devlink memory is kept track of through devres by
 474  * adding an action to remove it when unwinding.
 475  */
 476 struct ice_pf *ice_allocate_pf(struct device *dev)
 477 {
 478         struct devlink *devlink;
 479
 480         devlink = devlink_alloc(&ice_devlink_ops, sizeof(struct ice_pf), dev);
 481         if (!devlink)
 482                 return NULL;
 483
 484         /* Add an action to teardown the devlink when unwinding the driver */
 485         if (devm_add_action(dev, ice_devlink_free, devlink)) {
 486                 devlink_free(devlink);
 487                 return NULL;
 488         }
 489
 490         return devlink_priv(devlink);
 491 }
 492
 493 /**
 494  * ice_devlink_register - Register devlink interface for this PF
 495  * @pf: the PF to register the devlink for.
 496  *
 497  * Register the devlink instance associated with this physical function.
 498  *
 499  * Return: zero on success or an error code on failure.
 500  */
 501 int ice_devlink_register(struct ice_pf *pf)
 502 {
 503         struct devlink *devlink = priv_to_devlink(pf);
 504         struct device *dev = ice_pf_to_dev(pf);
 505         int err;
 506
 507         err = devlink_register(devlink);
 508         if (err) {
 509                 dev_err(dev, "devlink registration failed: %d\n", err);
 510                 return err;
 511         }
 512
 513         return 0;
 514 }
 515
 516 /**
 517  * ice_devlink_unregister - Unregister devlink resources for this PF.
 518  * @pf: the PF structure to cleanup
 519  *
 520  * Releases resources used by devlink and cleans up associated memory.
 521  */
 522 void ice_devlink_unregister(struct ice_pf *pf)
 523 {
 524         devlink_unregister(priv_to_devlink(pf));
 525 }
 526
 527 /**
 528  * ice_devlink_create_port - Create a devlink port for this VSI
 529  * @vsi: the VSI to create a port for
 530  *
 531  * Create and register a devlink_port for this VSI.
 532  *
 533  * Return: zero on success or an error code on failure.
 534  */
 535 int ice_devlink_create_port(struct ice_vsi *vsi)
 536 {
 537         struct devlink_port_attrs attrs = {};
 538         struct ice_port_info *pi;
 539         struct devlink *devlink;
 540         struct device *dev;
 541         struct ice_pf *pf;
 542         int err;
 543
 544         /* Currently we only create devlink_port instances for PF VSIs */
 545         if (vsi->type != ICE_VSI_PF)
 546                 return -EINVAL;
 547
 548         pf = vsi->back;
 549         devlink = priv_to_devlink(pf);
 550         dev = ice_pf_to_dev(pf);
 551         pi = pf->hw.port_info;
 552
 553         attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
 554         attrs.phys.port_number = pi->lport;
 555         devlink_port_attrs_set(&vsi->devlink_port, &attrs);
 556         err = devlink_port_register(devlink, &vsi->devlink_port, vsi->idx);
 557         if (err) {
 558                 dev_err(dev, "devlink_port_register failed: %d\n", err);
 559                 return err;
 560         }
 561
 562         vsi->devlink_port_registered = true;
 563
 564         return 0;
 565 }
 566
 567 /**
 568  * ice_devlink_destroy_port - Destroy the devlink_port for this VSI
 569  * @vsi: the VSI to cleanup
 570  *
 571  * Unregisters the devlink_port structure associated with this VSI.
 572  */
 573 void ice_devlink_destroy_port(struct ice_vsi *vsi)
 574 {
 575         if (!vsi->devlink_port_registered)
 576                 return;
 577
 578         devlink_port_type_clear(&vsi->devlink_port);
 579         devlink_port_unregister(&vsi->devlink_port);
 580
 581         vsi->devlink_port_registered = false;
 582 }
 583
 584 /**
 585  * ice_devlink_nvm_snapshot - Capture a snapshot of the Shadow RAM contents
 586  * @devlink: the devlink instance
 587  * @ops: the devlink region being snapshotted
 588  * @extack: extended ACK response structure
 589  * @data: on exit points to snapshot data buffer
 590  *
 591  * This function is called in response to the DEVLINK_CMD_REGION_TRIGGER for
 592  * the shadow-ram devlink region. It captures a snapshot of the shadow ram
 593  * contents. This snapshot can later be viewed via the devlink-region
 594  * interface.
 595  *
 596  * @returns zero on success, and updates the data pointer. Returns a non-zero
 597  * error code on failure.
 598  */
 599 static int ice_devlink_nvm_snapshot(struct devlink *devlink,
 600                                     const struct devlink_region_ops *ops,
 601                                     struct netlink_ext_ack *extack, u8 **data)
 602 {
 603         struct ice_pf *pf = devlink_priv(devlink);
 604         struct device *dev = ice_pf_to_dev(pf);
 605         struct ice_hw *hw = &pf->hw;
 606         enum ice_status status;
 607         void *nvm_data;
 608         u32 nvm_size;
 609
 610         nvm_size = hw->flash.flash_size;
 611         nvm_data = vzalloc(nvm_size);
 612         if (!nvm_data)
 613                 return -ENOMEM;
 614
 615         status = ice_acquire_nvm(hw, ICE_RES_READ);
 616         if (status) {
 617                 dev_dbg(dev, "ice_acquire_nvm failed, err %d aq_err %d\n",
 618                         status, hw->adminq.sq_last_status);
 619                 NL_SET_ERR_MSG_MOD(extack, "Failed to acquire NVM semaphore");
 620                 vfree(nvm_data);
 621                 return -EIO;
 622         }
 623
 624         status = ice_read_flat_nvm(hw, 0, &nvm_size, nvm_data, false);
 625         if (status) {
 626                 dev_dbg(dev, "ice_read_flat_nvm failed after reading %u bytes, err %d aq_err %d\n",
 627                         nvm_size, status, hw->adminq.sq_last_status);
 628                 NL_SET_ERR_MSG_MOD(extack, "Failed to read NVM contents");
 629                 ice_release_nvm(hw);
 630                 vfree(nvm_data);
 631                 return -EIO;
 632         }
 633
 634         ice_release_nvm(hw);
 635
 636         *data = nvm_data;
 637
 638         return 0;
 639 }
 640
 641 /**
 642  * ice_devlink_devcaps_snapshot - Capture snapshot of device capabilities
 643  * @devlink: the devlink instance
 644  * @ops: the devlink region being snapshotted
 645  * @extack: extended ACK response structure
 646  * @data: on exit points to snapshot data buffer
 647  *
 648  * This function is called in response to the DEVLINK_CMD_REGION_TRIGGER for
 649  * the device-caps devlink region. It captures a snapshot of the device
 650  * capabilities reported by firmware.
 651  *
 652  * @returns zero on success, and updates the data pointer. Returns a non-zero
 653  * error code on failure.
 654  */
 655 static int
 656 ice_devlink_devcaps_snapshot(struct devlink *devlink,
 657                              const struct devlink_region_ops *ops,
 658                              struct netlink_ext_ack *extack, u8 **data)
 659 {
 660         struct ice_pf *pf = devlink_priv(devlink);
 661         struct device *dev = ice_pf_to_dev(pf);
 662         struct ice_hw *hw = &pf->hw;
 663         enum ice_status status;
 664         void *devcaps;
 665
 666         devcaps = vzalloc(ICE_AQ_MAX_BUF_LEN);
 667         if (!devcaps)
 668                 return -ENOMEM;
 669
 670         status = ice_aq_list_caps(hw, devcaps, ICE_AQ_MAX_BUF_LEN, NULL,
 671                                   ice_aqc_opc_list_dev_caps, NULL);
 672         if (status) {
 673                 dev_dbg(dev, "ice_aq_list_caps: failed to read device capabilities, err %d aq_err %d\n",
 674                         status, hw->adminq.sq_last_status);
 675                 NL_SET_ERR_MSG_MOD(extack, "Failed to read device capabilities");
 676                 vfree(devcaps);
 677                 return -EIO;
 678         }
 679
 680         *data = (u8 *)devcaps;
 681
 682         return 0;
 683 }
 684
 685 static const struct devlink_region_ops ice_nvm_region_ops = {
 686         .name = "nvm-flash",
 687         .destructor = vfree,
 688         .snapshot = ice_devlink_nvm_snapshot,
 689 };
 690
 691 static const struct devlink_region_ops ice_devcaps_region_ops = {
 692         .name = "device-caps",
 693         .destructor = vfree,
 694         .snapshot = ice_devlink_devcaps_snapshot,
 695 };
 696
 697 /**
 698  * ice_devlink_init_regions - Initialize devlink regions
 699  * @pf: the PF device structure
 700  *
 701  * Create devlink regions used to enable access to dump the contents of the
 702  * flash memory on the device.
 703  */
 704 void ice_devlink_init_regions(struct ice_pf *pf)
 705 {
 706         struct devlink *devlink = priv_to_devlink(pf);
 707         struct device *dev = ice_pf_to_dev(pf);
 708         u64 nvm_size;
 709
 710         nvm_size = pf->hw.flash.flash_size;
 711         pf->nvm_region = devlink_region_create(devlink, &ice_nvm_region_ops, 1,
 712                                                nvm_size);
 713         if (IS_ERR(pf->nvm_region)) {
 714                 dev_err(dev, "failed to create NVM devlink region, err %ld\n",
 715                         PTR_ERR(pf->nvm_region));
 716                 pf->nvm_region = NULL;
 717         }
 718
 719         pf->devcaps_region = devlink_region_create(devlink,
 720                                                    &ice_devcaps_region_ops, 10,
 721                                                    ICE_AQ_MAX_BUF_LEN);
 722         if (IS_ERR(pf->devcaps_region)) {
 723                 dev_err(dev, "failed to create device-caps devlink region, err %ld\n",
 724                         PTR_ERR(pf->devcaps_region));
 725                 pf->devcaps_region = NULL;
 726         }
 727 }
 728
 729 /**
 730  * ice_devlink_destroy_regions - Destroy devlink regions
 731  * @pf: the PF device structure
 732  *
 733  * Remove previously created regions for this PF.
 734  */
 735 void ice_devlink_destroy_regions(struct ice_pf *pf)
 736 {
 737         if (pf->nvm_region)
 738                 devlink_region_destroy(pf->nvm_region);
 739         if (pf->devcaps_region)
 740                 devlink_region_destroy(pf->devcaps_region);
 741 }