drivers/net/ethernet/intel/i40e/i40e_ddp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
   3
   4 #include <linux/firmware.h>
   5 #include "i40e.h"
   6
   7 #define I40_DDP_FLASH_REGION            100
   8 #define I40E_PROFILE_INFO_SIZE          48
   9 #define I40E_MAX_PROFILE_NUM            16
  10 #define I40E_PROFILE_LIST_SIZE          \
  11         (I40E_PROFILE_INFO_SIZE * I40E_MAX_PROFILE_NUM + 4)
  12 #define I40E_DDP_PROFILE_PATH           "intel/i40e/ddp/"
  13 #define I40E_DDP_PROFILE_NAME_MAX       64
  14
  15 struct i40e_ddp_profile_list {
  16         u32 p_count;
  17         struct i40e_profile_info p_info[];
  18 };
  19
  20 struct i40e_ddp_old_profile_list {
  21         struct list_head list;
  22         size_t old_ddp_size;
  23         u8 old_ddp_buf[];
  24 };
  25
  26 /**
  27  * i40e_ddp_profiles_eq - checks if DDP profiles are the equivalent
  28  * @a: new profile info
  29  * @b: old profile info
  30  *
  31  * checks if DDP profiles are the equivalent.
  32  * Returns true if profiles are the same.
  33  **/
  34 static bool i40e_ddp_profiles_eq(struct i40e_profile_info *a,
  35                                  struct i40e_profile_info *b)
  36 {
  37         return a->track_id == b->track_id &&
  38                 !memcmp(&a->version, &b->version, sizeof(a->version)) &&
  39                 !memcmp(&a->name, &b->name, I40E_DDP_NAME_SIZE);
  40 }
  41
  42 /**
  43  * i40e_ddp_does_profile_exist - checks if DDP profile loaded already
  44  * @hw: HW data structure
  45  * @pinfo: DDP profile information structure
  46  *
  47  * checks if DDP profile loaded already.
  48  * Returns >0 if the profile exists.
  49  * Returns  0 if the profile is absent.
  50  * Returns <0 if error.
  51  **/
  52 static int i40e_ddp_does_profile_exist(struct i40e_hw *hw,
  53                                        struct i40e_profile_info *pinfo)
  54 {
  55         struct i40e_ddp_profile_list *profile_list;
  56         u8 buff[I40E_PROFILE_LIST_SIZE];
  57         int status;
  58         int i;
  59
  60         status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
  61                                       NULL);
  62         if (status)
  63                 return -1;
  64
  65         profile_list = (struct i40e_ddp_profile_list *)buff;
  66         for (i = 0; i < profile_list->p_count; i++) {
  67                 if (i40e_ddp_profiles_eq(pinfo, &profile_list->p_info[i]))
  68                         return 1;
  69         }
  70         return 0;
  71 }
  72
  73 /**
  74  * i40e_ddp_profiles_overlap - checks if DDP profiles overlap.
  75  * @new: new profile info
  76  * @old: old profile info
  77  *
  78  * checks if DDP profiles overlap.
  79  * Returns true if profiles are overlap.
  80  **/
  81 static bool i40e_ddp_profiles_overlap(struct i40e_profile_info *new,
  82                                       struct i40e_profile_info *old)
  83 {
  84         unsigned int group_id_old = FIELD_GET(0x00FF0000, old->track_id);
  85         unsigned int group_id_new = FIELD_GET(0x00FF0000, new->track_id);
  86
  87         /* 0x00 group must be only the first */
  88         if (group_id_new == 0)
  89                 return true;
  90         /* 0xFF group is compatible with anything else */
  91         if (group_id_new == 0xFF || group_id_old == 0xFF)
  92                 return false;
  93         /* otherwise only profiles from the same group are compatible*/
  94         return group_id_old != group_id_new;
  95 }
  96
  97 /**
  98  * i40e_ddp_does_profile_overlap - checks if DDP overlaps with existing one.
  99  * @hw: HW data structure
 100  * @pinfo: DDP profile information structure
 101  *
 102  * checks if DDP profile overlaps with existing one.
 103  * Returns >0 if the profile overlaps.
 104  * Returns  0 if the profile is ok.
 105  * Returns <0 if error.
 106  **/
 107 static int i40e_ddp_does_profile_overlap(struct i40e_hw *hw,
 108                                          struct i40e_profile_info *pinfo)
 109 {
 110         struct i40e_ddp_profile_list *profile_list;
 111         u8 buff[I40E_PROFILE_LIST_SIZE];
 112         int status;
 113         int i;
 114
 115         status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
 116                                       NULL);
 117         if (status)
 118                 return -EIO;
 119
 120         profile_list = (struct i40e_ddp_profile_list *)buff;
 121         for (i = 0; i < profile_list->p_count; i++) {
 122                 if (i40e_ddp_profiles_overlap(pinfo,
 123                                               &profile_list->p_info[i]))
 124                         return 1;
 125         }
 126         return 0;
 127 }
 128
 129 /**
 130  * i40e_add_pinfo
 131  * @hw: pointer to the hardware structure
 132  * @profile: pointer to the profile segment of the package
 133  * @profile_info_sec: buffer for information section
 134  * @track_id: package tracking id
 135  *
 136  * Register a profile to the list of loaded profiles.
 137  */
 138 static int
 139 i40e_add_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
 140                u8 *profile_info_sec, u32 track_id)
 141 {
 142         struct i40e_profile_section_header *sec;
 143         struct i40e_profile_info *pinfo;
 144         u32 offset = 0, info = 0;
 145         int status;
 146
 147         sec = (struct i40e_profile_section_header *)profile_info_sec;
 148         sec->tbl_size = 1;
 149         sec->data_end = sizeof(struct i40e_profile_section_header) +
 150                         sizeof(struct i40e_profile_info);
 151         sec->section.type = SECTION_TYPE_INFO;
 152         sec->section.offset = sizeof(struct i40e_profile_section_header);
 153         sec->section.size = sizeof(struct i40e_profile_info);
 154         pinfo = (struct i40e_profile_info *)(profile_info_sec +
 155                                              sec->section.offset);
 156         pinfo->track_id = track_id;
 157         pinfo->version = profile->version;
 158         pinfo->op = I40E_DDP_ADD_TRACKID;
 159
 160         /* Clear reserved field */
 161         memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
 162         memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
 163
 164         status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
 165                                    track_id, &offset, &info, NULL);
 166         return status;
 167 }
 168
 169 /**
 170  * i40e_del_pinfo - delete DDP profile info from NIC
 171  * @hw: HW data structure
 172  * @profile: DDP profile segment to be deleted
 173  * @profile_info_sec: DDP profile section header
 174  * @track_id: track ID of the profile for deletion
 175  *
 176  * Removes DDP profile from the NIC.
 177  **/
 178 static int
 179 i40e_del_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
 180                u8 *profile_info_sec, u32 track_id)
 181 {
 182         struct i40e_profile_section_header *sec;
 183         struct i40e_profile_info *pinfo;
 184         u32 offset = 0, info = 0;
 185         int status;
 186
 187         sec = (struct i40e_profile_section_header *)profile_info_sec;
 188         sec->tbl_size = 1;
 189         sec->data_end = sizeof(struct i40e_profile_section_header) +
 190                         sizeof(struct i40e_profile_info);
 191         sec->section.type = SECTION_TYPE_INFO;
 192         sec->section.offset = sizeof(struct i40e_profile_section_header);
 193         sec->section.size = sizeof(struct i40e_profile_info);
 194         pinfo = (struct i40e_profile_info *)(profile_info_sec +
 195                                              sec->section.offset);
 196         pinfo->track_id = track_id;
 197         pinfo->version = profile->version;
 198         pinfo->op = I40E_DDP_REMOVE_TRACKID;
 199
 200         /* Clear reserved field */
 201         memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
 202         memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
 203
 204         status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
 205                                    track_id, &offset, &info, NULL);
 206         return status;
 207 }
 208
 209 /**
 210  * i40e_ddp_is_pkg_hdr_valid - performs basic pkg header integrity checks
 211  * @netdev: net device structure (for logging purposes)
 212  * @pkg_hdr: pointer to package header
 213  * @size_huge: size of the whole DDP profile package in size_t
 214  *
 215  * Checks correctness of pkg header: Version, size too big/small, and
 216  * all segment offsets alignment and boundaries. This function lets
 217  * reject non DDP profile file to be loaded by administrator mistake.
 218  **/
 219 static bool i40e_ddp_is_pkg_hdr_valid(struct net_device *netdev,
 220                                       struct i40e_package_header *pkg_hdr,
 221                                       size_t size_huge)
 222 {
 223         u32 size = 0xFFFFFFFFU & size_huge;
 224         u32 pkg_hdr_size;
 225         u32 segment;
 226
 227         if (!pkg_hdr)
 228                 return false;
 229
 230         if (pkg_hdr->version.major > 0) {
 231                 struct i40e_ddp_version ver = pkg_hdr->version;
 232
 233                 netdev_err(netdev, "Unsupported DDP profile version %u.%u.%u.%u",
 234                            ver.major, ver.minor, ver.update, ver.draft);
 235                 return false;
 236         }
 237         if (size_huge > size) {
 238                 netdev_err(netdev, "Invalid DDP profile - size is bigger than 4G");
 239                 return false;
 240         }
 241         if (size < (sizeof(struct i40e_package_header) + sizeof(u32) +
 242                 sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
 243                 netdev_err(netdev, "Invalid DDP profile - size is too small.");
 244                 return false;
 245         }
 246
 247         pkg_hdr_size = sizeof(u32) * (pkg_hdr->segment_count + 2U);
 248         if (size < pkg_hdr_size) {
 249                 netdev_err(netdev, "Invalid DDP profile - too many segments");
 250                 return false;
 251         }
 252         for (segment = 0; segment < pkg_hdr->segment_count; ++segment) {
 253                 u32 offset = pkg_hdr->segment_offset[segment];
 254
 255                 if (0xFU & offset) {
 256                         netdev_err(netdev,
 257                                    "Invalid DDP profile %u segment alignment",
 258                                    segment);
 259                         return false;
 260                 }
 261                 if (pkg_hdr_size > offset || offset >= size) {
 262                         netdev_err(netdev,
 263                                    "Invalid DDP profile %u segment offset",
 264                                    segment);
 265                         return false;
 266                 }
 267         }
 268
 269         return true;
 270 }
 271
 272 /**
 273  * i40e_ddp_load - performs DDP loading
 274  * @netdev: net device structure
 275  * @data: buffer containing recipe file
 276  * @size: size of the buffer
 277  * @is_add: true when loading profile, false when rolling back the previous one
 278  *
 279  * Checks correctness and loads DDP profile to the NIC. The function is
 280  * also used for rolling back previously loaded profile.
 281  **/
 282 static int i40e_ddp_load(struct net_device *netdev, const u8 *data, size_t size,
 283                          bool is_add)
 284 {
 285         u8 profile_info_sec[sizeof(struct i40e_profile_section_header) +
 286                             sizeof(struct i40e_profile_info)];
 287         struct i40e_metadata_segment *metadata_hdr;
 288         struct i40e_profile_segment *profile_hdr;
 289         struct i40e_profile_info pinfo;
 290         struct i40e_package_header *pkg_hdr;
 291         struct i40e_netdev_priv *np = netdev_priv(netdev);
 292         struct i40e_vsi *vsi = np->vsi;
 293         struct i40e_pf *pf = vsi->back;
 294         u32 track_id;
 295         int istatus;
 296         int status;
 297
 298         pkg_hdr = (struct i40e_package_header *)data;
 299         if (!i40e_ddp_is_pkg_hdr_valid(netdev, pkg_hdr, size))
 300                 return -EINVAL;
 301
 302         if (size < (sizeof(struct i40e_package_header) + sizeof(u32) +
 303                     sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
 304                 netdev_err(netdev, "Invalid DDP recipe size.");
 305                 return -EINVAL;
 306         }
 307
 308         /* Find beginning of segment data in buffer */
 309         metadata_hdr = (struct i40e_metadata_segment *)
 310                 i40e_find_segment_in_package(SEGMENT_TYPE_METADATA, pkg_hdr);
 311         if (!metadata_hdr) {
 312                 netdev_err(netdev, "Failed to find metadata segment in DDP recipe.");
 313                 return -EINVAL;
 314         }
 315
 316         track_id = metadata_hdr->track_id;
 317         profile_hdr = (struct i40e_profile_segment *)
 318                 i40e_find_segment_in_package(SEGMENT_TYPE_I40E, pkg_hdr);
 319         if (!profile_hdr) {
 320                 netdev_err(netdev, "Failed to find profile segment in DDP recipe.");
 321                 return -EINVAL;
 322         }
 323
 324         pinfo.track_id = track_id;
 325         pinfo.version = profile_hdr->version;
 326         if (is_add)
 327                 pinfo.op = I40E_DDP_ADD_TRACKID;
 328         else
 329                 pinfo.op = I40E_DDP_REMOVE_TRACKID;
 330
 331         memcpy(pinfo.name, profile_hdr->name, I40E_DDP_NAME_SIZE);
 332
 333         /* Check if profile data already exists*/
 334         istatus = i40e_ddp_does_profile_exist(&pf->hw, &pinfo);
 335         if (istatus < 0) {
 336                 netdev_err(netdev, "Failed to fetch loaded profiles.");
 337                 return istatus;
 338         }
 339         if (is_add) {
 340                 if (istatus > 0) {
 341                         netdev_err(netdev, "DDP profile already loaded.");
 342                         return -EINVAL;
 343                 }
 344                 istatus = i40e_ddp_does_profile_overlap(&pf->hw, &pinfo);
 345                 if (istatus < 0) {
 346                         netdev_err(netdev, "Failed to fetch loaded profiles.");
 347                         return istatus;
 348                 }
 349                 if (istatus > 0) {
 350                         netdev_err(netdev, "DDP profile overlaps with existing one.");
 351                         return -EINVAL;
 352                 }
 353         } else {
 354                 if (istatus == 0) {
 355                         netdev_err(netdev,
 356                                    "DDP profile for deletion does not exist.");
 357                         return -EINVAL;
 358                 }
 359         }
 360
 361         /* Load profile data */
 362         if (is_add) {
 363                 status = i40e_write_profile(&pf->hw, profile_hdr, track_id);
 364                 if (status) {
 365                         if (status == -ENODEV) {
 366                                 netdev_err(netdev,
 367                                            "Profile is not supported by the device.");
 368                                 return -EPERM;
 369                         }
 370                         netdev_err(netdev, "Failed to write DDP profile.");
 371                         return -EIO;
 372                 }
 373         } else {
 374                 status = i40e_rollback_profile(&pf->hw, profile_hdr, track_id);
 375                 if (status) {
 376                         netdev_err(netdev, "Failed to remove DDP profile.");
 377                         return -EIO;
 378                 }
 379         }
 380
 381         /* Add/remove profile to/from profile list in FW */
 382         if (is_add) {
 383                 status = i40e_add_pinfo(&pf->hw, profile_hdr, profile_info_sec,
 384                                         track_id);
 385                 if (status) {
 386                         netdev_err(netdev, "Failed to add DDP profile info.");
 387                         return -EIO;
 388                 }
 389         } else {
 390                 status = i40e_del_pinfo(&pf->hw, profile_hdr, profile_info_sec,
 391                                         track_id);
 392                 if (status) {
 393                         netdev_err(netdev, "Failed to restore DDP profile info.");
 394                         return -EIO;
 395                 }
 396         }
 397
 398         return 0;
 399 }
 400
 401 /**
 402  * i40e_ddp_restore - restore previously loaded profile and remove from list
 403  * @pf: PF data struct
 404  *
 405  * Restores previously loaded profile stored on the list in driver memory.
 406  * After rolling back removes entry from the list.
 407  **/
 408 static int i40e_ddp_restore(struct i40e_pf *pf)
 409 {
 410         struct i40e_ddp_old_profile_list *entry;
 411         struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
 412         int status = 0;
 413
 414         if (!list_empty(&pf->ddp_old_prof)) {
 415                 entry = list_first_entry(&pf->ddp_old_prof,
 416                                          struct i40e_ddp_old_profile_list,
 417                                          list);
 418                 status = i40e_ddp_load(netdev, entry->old_ddp_buf,
 419                                        entry->old_ddp_size, false);
 420                 list_del(&entry->list);
 421                 kfree(entry);
 422         }
 423         return status;
 424 }
 425
 426 /**
 427  * i40e_ddp_flash - callback function for ethtool flash feature
 428  * @netdev: net device structure
 429  * @flash: kernel flash structure
 430  *
 431  * Ethtool callback function used for loading and unloading DDP profiles.
 432  **/
 433 int i40e_ddp_flash(struct net_device *netdev, struct ethtool_flash *flash)
 434 {
 435         const struct firmware *ddp_config;
 436         struct i40e_netdev_priv *np = netdev_priv(netdev);
 437         struct i40e_vsi *vsi = np->vsi;
 438         struct i40e_pf *pf = vsi->back;
 439         int status = 0;
 440
 441         /* Check for valid region first */
 442         if (flash->region != I40_DDP_FLASH_REGION) {
 443                 netdev_err(netdev, "Requested firmware region is not recognized by this driver.");
 444                 return -EINVAL;
 445         }
 446         if (pf->hw.bus.func != 0) {
 447                 netdev_err(netdev, "Any DDP operation is allowed only on Phy0 NIC interface");
 448                 return -EINVAL;
 449         }
 450
 451         /* If the user supplied "-" instead of file name rollback previously
 452          * stored profile.
 453          */
 454         if (strncmp(flash->data, "-", 2) != 0) {
 455                 struct i40e_ddp_old_profile_list *list_entry;
 456                 char profile_name[sizeof(I40E_DDP_PROFILE_PATH)
 457                                   + I40E_DDP_PROFILE_NAME_MAX];
 458
 459                 scnprintf(profile_name, sizeof(profile_name), "%s%s",
 460                           I40E_DDP_PROFILE_PATH, flash->data);
 461
 462                 /* Load DDP recipe. */
 463                 status = request_firmware(&ddp_config, profile_name,
 464                                           &netdev->dev);
 465                 if (status) {
 466                         netdev_err(netdev, "DDP recipe file request failed.");
 467                         return status;
 468                 }
 469
 470                 status = i40e_ddp_load(netdev, ddp_config->data,
 471                                        ddp_config->size, true);
 472
 473                 if (!status) {
 474                         list_entry =
 475                           kzalloc(sizeof(struct i40e_ddp_old_profile_list) +
 476                                   ddp_config->size, GFP_KERNEL);
 477                         if (!list_entry) {
 478                                 netdev_info(netdev, "Failed to allocate memory for previous DDP profile data.");
 479                                 netdev_info(netdev, "New profile loaded but roll-back will be impossible.");
 480                         } else {
 481                                 memcpy(list_entry->old_ddp_buf,
 482                                        ddp_config->data, ddp_config->size);
 483                                 list_entry->old_ddp_size = ddp_config->size;
 484                                 list_add(&list_entry->list, &pf->ddp_old_prof);
 485                         }
 486                 }
 487
 488                 release_firmware(ddp_config);
 489         } else {
 490                 if (!list_empty(&pf->ddp_old_prof)) {
 491                         status = i40e_ddp_restore(pf);
 492                 } else {
 493                         netdev_warn(netdev, "There is no DDP profile to restore.");
 494                         status = -ENOENT;
 495                 }
 496         }
 497         return status;
 498 }