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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2019, Intel Corporation. */
   3
   4 #include "ice_dcb_lib.h"
   5 #include "ice_dcb_nl.h"
   6
   7 /**
   8  * ice_vsi_cfg_netdev_tc - Setup the netdev TC configuration
   9  * @vsi: the VSI being configured
  10  * @ena_tc: TC map to be enabled
  11  */
  12 void ice_vsi_cfg_netdev_tc(struct ice_vsi *vsi, u8 ena_tc)
  13 {
  14         struct net_device *netdev = vsi->netdev;
  15         struct ice_pf *pf = vsi->back;
  16         struct ice_dcbx_cfg *dcbcfg;
  17         u8 netdev_tc;
  18         int i;
  19
  20         if (!netdev)
  21                 return;
  22
  23         if (!ena_tc) {
  24                 netdev_reset_tc(netdev);
  25                 return;
  26         }
  27
  28         if (netdev_set_num_tc(netdev, vsi->tc_cfg.numtc))
  29                 return;
  30
  31         dcbcfg = &pf->hw.port_info->local_dcbx_cfg;
  32
  33         ice_for_each_traffic_class(i)
  34                 if (vsi->tc_cfg.ena_tc & BIT(i))
  35                         netdev_set_tc_queue(netdev,
  36                                             vsi->tc_cfg.tc_info[i].netdev_tc,
  37                                             vsi->tc_cfg.tc_info[i].qcount_tx,
  38                                             vsi->tc_cfg.tc_info[i].qoffset);
  39
  40         for (i = 0; i < ICE_MAX_USER_PRIORITY; i++) {
  41                 u8 ets_tc = dcbcfg->etscfg.prio_table[i];
  42
  43                 /* Get the mapped netdev TC# for the UP */
  44                 netdev_tc = vsi->tc_cfg.tc_info[ets_tc].netdev_tc;
  45                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
  46         }
  47 }
  48
  49 /**
  50  * ice_dcb_get_ena_tc - return bitmap of enabled TCs
  51  * @dcbcfg: DCB config to evaluate for enabled TCs
  52  */
  53 u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg)
  54 {
  55         u8 i, num_tc, ena_tc = 1;
  56
  57         num_tc = ice_dcb_get_num_tc(dcbcfg);
  58
  59         for (i = 0; i < num_tc; i++)
  60                 ena_tc |= BIT(i);
  61
  62         return ena_tc;
  63 }
  64
  65 /**
  66  * ice_dcb_get_num_tc - Get the number of TCs from DCBX config
  67  * @dcbcfg: config to retrieve number of TCs from
  68  */
  69 u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg)
  70 {
  71         bool tc_unused = false;
  72         u8 num_tc = 0;
  73         u8 ret = 0;
  74         int i;
  75
  76         /* Scan the ETS Config Priority Table to find traffic classes
  77          * enabled and create a bitmask of enabled TCs
  78          */
  79         for (i = 0; i < CEE_DCBX_MAX_PRIO; i++)
  80                 num_tc |= BIT(dcbcfg->etscfg.prio_table[i]);
  81
  82         /* Scan bitmask for contiguous TCs starting with TC0 */
  83         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  84                 if (num_tc & BIT(i)) {
  85                         if (!tc_unused) {
  86                                 ret++;
  87                         } else {
  88                                 pr_err("Non-contiguous TCs - Disabling DCB\n");
  89                                 return 1;
  90                         }
  91                 } else {
  92                         tc_unused = true;
  93                 }
  94         }
  95
  96         /* There is always at least 1 TC */
  97         if (!ret)
  98                 ret = 1;
  99
 100         return ret;
 101 }
 102
 103 /**
 104  * ice_dcb_get_tc - Get the TC associated with the queue
 105  * @vsi: ptr to the VSI
 106  * @queue_index: queue number associated with VSI
 107  */
 108 u8 ice_dcb_get_tc(struct ice_vsi *vsi, int queue_index)
 109 {
 110         return vsi->tx_rings[queue_index]->dcb_tc;
 111 }
 112
 113 /**
 114  * ice_vsi_cfg_dcb_rings - Update rings to reflect DCB TC
 115  * @vsi: VSI owner of rings being updated
 116  */
 117 void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi)
 118 {
 119         struct ice_ring *tx_ring, *rx_ring;
 120         u16 qoffset, qcount;
 121         int i, n;
 122
 123         if (!test_bit(ICE_FLAG_DCB_ENA, vsi->back->flags)) {
 124                 /* Reset the TC information */
 125                 for (i = 0; i < vsi->num_txq; i++) {
 126                         tx_ring = vsi->tx_rings[i];
 127                         tx_ring->dcb_tc = 0;
 128                 }
 129                 for (i = 0; i < vsi->num_rxq; i++) {
 130                         rx_ring = vsi->rx_rings[i];
 131                         rx_ring->dcb_tc = 0;
 132                 }
 133                 return;
 134         }
 135
 136         ice_for_each_traffic_class(n) {
 137                 if (!(vsi->tc_cfg.ena_tc & BIT(n)))
 138                         break;
 139
 140                 qoffset = vsi->tc_cfg.tc_info[n].qoffset;
 141                 qcount = vsi->tc_cfg.tc_info[n].qcount_tx;
 142                 for (i = qoffset; i < (qoffset + qcount); i++) {
 143                         tx_ring = vsi->tx_rings[i];
 144                         rx_ring = vsi->rx_rings[i];
 145                         tx_ring->dcb_tc = n;
 146                         rx_ring->dcb_tc = n;
 147                 }
 148         }
 149 }
 150
 151 /**
 152  * ice_pf_dcb_cfg - Apply new DCB configuration
 153  * @pf: pointer to the PF struct
 154  * @new_cfg: DCBX config to apply
 155  * @locked: is the RTNL held
 156  */
 157 int ice_pf_dcb_cfg(struct ice_pf *pf, struct ice_dcbx_cfg *new_cfg, bool locked)
 158 {
 159         struct ice_aqc_port_ets_elem buf = { 0 };
 160         struct ice_dcbx_cfg *old_cfg, *curr_cfg;
 161         struct device *dev = ice_pf_to_dev(pf);
 162         int ret = ICE_DCB_NO_HW_CHG;
 163         struct ice_vsi *pf_vsi;
 164
 165         curr_cfg = &pf->hw.port_info->local_dcbx_cfg;
 166
 167         /* FW does not care if change happened */
 168         if (!pf->hw.port_info->is_sw_lldp)
 169                 ret = ICE_DCB_HW_CHG_RST;
 170
 171         /* Enable DCB tagging only when more than one TC */
 172         if (ice_dcb_get_num_tc(new_cfg) > 1) {
 173                 dev_dbg(dev, "DCB tagging enabled (num TC > 1)\n");
 174                 set_bit(ICE_FLAG_DCB_ENA, pf->flags);
 175         } else {
 176                 dev_dbg(dev, "DCB tagging disabled (num TC = 1)\n");
 177                 clear_bit(ICE_FLAG_DCB_ENA, pf->flags);
 178         }
 179
 180         if (!memcmp(new_cfg, curr_cfg, sizeof(*new_cfg))) {
 181                 dev_dbg(dev, "No change in DCB config required\n");
 182                 return ret;
 183         }
 184
 185         /* Store old config in case FW config fails */
 186         old_cfg = kmemdup(curr_cfg, sizeof(*old_cfg), GFP_KERNEL);
 187         if (!old_cfg)
 188                 return -ENOMEM;
 189
 190         dev_info(dev, "Commit DCB Configuration to the hardware\n");
 191         pf_vsi = ice_get_main_vsi(pf);
 192         if (!pf_vsi) {
 193                 dev_dbg(dev, "PF VSI doesn't exist\n");
 194                 ret = -EINVAL;
 195                 goto free_cfg;
 196         }
 197
 198         /* avoid race conditions by holding the lock while disabling and
 199          * re-enabling the VSI
 200          */
 201         if (!locked)
 202                 rtnl_lock();
 203         ice_dis_vsi(pf_vsi, true);
 204
 205         memcpy(curr_cfg, new_cfg, sizeof(*curr_cfg));
 206         memcpy(&curr_cfg->etsrec, &curr_cfg->etscfg, sizeof(curr_cfg->etsrec));
 207         memcpy(&new_cfg->etsrec, &curr_cfg->etscfg, sizeof(curr_cfg->etsrec));
 208
 209         /* Only send new config to HW if we are in SW LLDP mode. Otherwise,
 210          * the new config came from the HW in the first place.
 211          */
 212         if (pf->hw.port_info->is_sw_lldp) {
 213                 ret = ice_set_dcb_cfg(pf->hw.port_info);
 214                 if (ret) {
 215                         dev_err(dev, "Set DCB Config failed\n");
 216                         /* Restore previous settings to local config */
 217                         memcpy(curr_cfg, old_cfg, sizeof(*curr_cfg));
 218                         goto out;
 219                 }
 220         }
 221
 222         ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
 223         if (ret) {
 224                 dev_err(dev, "Query Port ETS failed\n");
 225                 goto out;
 226         }
 227
 228         ice_pf_dcb_recfg(pf);
 229
 230 out:
 231         ice_ena_vsi(pf_vsi, true);
 232         if (!locked)
 233                 rtnl_unlock();
 234 free_cfg:
 235         kfree(old_cfg);
 236         return ret;
 237 }
 238
 239 /**
 240  * ice_cfg_etsrec_defaults - Set default ETS recommended DCB config
 241  * @pi: port information structure
 242  */
 243 static void ice_cfg_etsrec_defaults(struct ice_port_info *pi)
 244 {
 245         struct ice_dcbx_cfg *dcbcfg = &pi->local_dcbx_cfg;
 246         u8 i;
 247
 248         /* Ensure ETS recommended DCB configuration is not already set */
 249         if (dcbcfg->etsrec.maxtcs)
 250                 return;
 251
 252         /* In CEE mode, set the default to 1 TC */
 253         dcbcfg->etsrec.maxtcs = 1;
 254         for (i = 0; i < ICE_MAX_TRAFFIC_CLASS; i++) {
 255                 dcbcfg->etsrec.tcbwtable[i] = i ? 0 : 100;
 256                 dcbcfg->etsrec.tsatable[i] = i ? ICE_IEEE_TSA_STRICT :
 257                                                  ICE_IEEE_TSA_ETS;
 258         }
 259 }
 260
 261 /**
 262  * ice_dcb_need_recfg - Check if DCB needs reconfig
 263  * @pf: board private structure
 264  * @old_cfg: current DCB config
 265  * @new_cfg: new DCB config
 266  */
 267 static bool
 268 ice_dcb_need_recfg(struct ice_pf *pf, struct ice_dcbx_cfg *old_cfg,
 269                    struct ice_dcbx_cfg *new_cfg)
 270 {
 271         struct device *dev = ice_pf_to_dev(pf);
 272         bool need_reconfig = false;
 273
 274         /* Check if ETS configuration has changed */
 275         if (memcmp(&new_cfg->etscfg, &old_cfg->etscfg,
 276                    sizeof(new_cfg->etscfg))) {
 277                 /* If Priority Table has changed reconfig is needed */
 278                 if (memcmp(&new_cfg->etscfg.prio_table,
 279                            &old_cfg->etscfg.prio_table,
 280                            sizeof(new_cfg->etscfg.prio_table))) {
 281                         need_reconfig = true;
 282                         dev_dbg(dev, "ETS UP2TC changed.\n");
 283                 }
 284
 285                 if (memcmp(&new_cfg->etscfg.tcbwtable,
 286                            &old_cfg->etscfg.tcbwtable,
 287                            sizeof(new_cfg->etscfg.tcbwtable)))
 288                         dev_dbg(dev, "ETS TC BW Table changed.\n");
 289
 290                 if (memcmp(&new_cfg->etscfg.tsatable,
 291                            &old_cfg->etscfg.tsatable,
 292                            sizeof(new_cfg->etscfg.tsatable)))
 293                         dev_dbg(dev, "ETS TSA Table changed.\n");
 294         }
 295
 296         /* Check if PFC configuration has changed */
 297         if (memcmp(&new_cfg->pfc, &old_cfg->pfc, sizeof(new_cfg->pfc))) {
 298                 need_reconfig = true;
 299                 dev_dbg(dev, "PFC config change detected.\n");
 300         }
 301
 302         /* Check if APP Table has changed */
 303         if (memcmp(&new_cfg->app, &old_cfg->app, sizeof(new_cfg->app))) {
 304                 need_reconfig = true;
 305                 dev_dbg(dev, "APP Table change detected.\n");
 306         }
 307
 308         dev_dbg(dev, "dcb need_reconfig=%d\n", need_reconfig);
 309         return need_reconfig;
 310 }
 311
 312 /**
 313  * ice_dcb_rebuild - rebuild DCB post reset
 314  * @pf: physical function instance
 315  */
 316 void ice_dcb_rebuild(struct ice_pf *pf)
 317 {
 318         struct ice_dcbx_cfg *local_dcbx_cfg, *desired_dcbx_cfg, *prev_cfg;
 319         struct ice_aqc_port_ets_elem buf = { 0 };
 320         struct device *dev = ice_pf_to_dev(pf);
 321         enum ice_status ret;
 322
 323         ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
 324         if (ret) {
 325                 dev_err(dev, "Query Port ETS failed\n");
 326                 goto dcb_error;
 327         }
 328
 329         /* If DCB was not enabled previously, we are done */
 330         if (!test_bit(ICE_FLAG_DCB_ENA, pf->flags))
 331                 return;
 332
 333         local_dcbx_cfg = &pf->hw.port_info->local_dcbx_cfg;
 334         desired_dcbx_cfg = &pf->hw.port_info->desired_dcbx_cfg;
 335
 336         /* Save current willing state and force FW to unwilling */
 337         local_dcbx_cfg->etscfg.willing = 0x0;
 338         local_dcbx_cfg->pfc.willing = 0x0;
 339         local_dcbx_cfg->app_mode = ICE_DCBX_APPS_NON_WILLING;
 340
 341         ice_cfg_etsrec_defaults(pf->hw.port_info);
 342         ret = ice_set_dcb_cfg(pf->hw.port_info);
 343         if (ret) {
 344                 dev_err(dev, "Failed to set DCB to unwilling\n");
 345                 goto dcb_error;
 346         }
 347
 348         /* Retrieve DCB config and ensure same as current in SW */
 349         prev_cfg = kmemdup(local_dcbx_cfg, sizeof(*prev_cfg), GFP_KERNEL);
 350         if (!prev_cfg)
 351                 goto dcb_error;
 352
 353         ice_init_dcb(&pf->hw, true);
 354         if (pf->hw.port_info->dcbx_status == ICE_DCBX_STATUS_DIS)
 355                 pf->hw.port_info->is_sw_lldp = true;
 356         else
 357                 pf->hw.port_info->is_sw_lldp = false;
 358
 359         if (ice_dcb_need_recfg(pf, prev_cfg, local_dcbx_cfg)) {
 360                 /* difference in cfg detected - disable DCB till next MIB */
 361                 dev_err(dev, "Set local MIB not accurate\n");
 362                 kfree(prev_cfg);
 363                 goto dcb_error;
 364         }
 365
 366         /* fetched config congruent to previous configuration */
 367         kfree(prev_cfg);
 368
 369         /* Set the local desired config */
 370         if (local_dcbx_cfg->dcbx_mode == ICE_DCBX_MODE_CEE)
 371                 memcpy(local_dcbx_cfg, desired_dcbx_cfg,
 372                        sizeof(*local_dcbx_cfg));
 373
 374         ice_cfg_etsrec_defaults(pf->hw.port_info);
 375         ret = ice_set_dcb_cfg(pf->hw.port_info);
 376         if (ret) {
 377                 dev_err(dev, "Failed to set desired config\n");
 378                 goto dcb_error;
 379         }
 380         dev_info(dev, "DCB restored after reset\n");
 381         ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
 382         if (ret) {
 383                 dev_err(dev, "Query Port ETS failed\n");
 384                 goto dcb_error;
 385         }
 386
 387         return;
 388
 389 dcb_error:
 390         dev_err(dev, "Disabling DCB until new settings occur\n");
 391         prev_cfg = kzalloc(sizeof(*prev_cfg), GFP_KERNEL);
 392         if (!prev_cfg)
 393                 return;
 394
 395         prev_cfg->etscfg.willing = true;
 396         prev_cfg->etscfg.tcbwtable[0] = ICE_TC_MAX_BW;
 397         prev_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS;
 398         memcpy(&prev_cfg->etsrec, &prev_cfg->etscfg, sizeof(prev_cfg->etsrec));
 399         ice_pf_dcb_cfg(pf, prev_cfg, false);
 400         kfree(prev_cfg);
 401 }
 402
 403 /**
 404  * ice_dcb_init_cfg - set the initial DCB config in SW
 405  * @pf: PF to apply config to
 406  * @locked: Is the RTNL held
 407  */
 408 static int ice_dcb_init_cfg(struct ice_pf *pf, bool locked)
 409 {
 410         struct ice_dcbx_cfg *newcfg;
 411         struct ice_port_info *pi;
 412         int ret = 0;
 413
 414         pi = pf->hw.port_info;
 415         newcfg = kmemdup(&pi->local_dcbx_cfg, sizeof(*newcfg), GFP_KERNEL);
 416         if (!newcfg)
 417                 return -ENOMEM;
 418
 419         memset(&pi->local_dcbx_cfg, 0, sizeof(*newcfg));
 420
 421         dev_info(ice_pf_to_dev(pf), "Configuring initial DCB values\n");
 422         if (ice_pf_dcb_cfg(pf, newcfg, locked))
 423                 ret = -EINVAL;
 424
 425         kfree(newcfg);
 426
 427         return ret;
 428 }
 429
 430 /**
 431  * ice_dcb_sw_default_config - Apply a default DCB config
 432  * @pf: PF to apply config to
 433  * @ets_willing: configure ets willing
 434  * @locked: was this function called with RTNL held
 435  */
 436 static int ice_dcb_sw_dflt_cfg(struct ice_pf *pf, bool ets_willing, bool locked)
 437 {
 438         struct ice_aqc_port_ets_elem buf = { 0 };
 439         struct ice_dcbx_cfg *dcbcfg;
 440         struct ice_port_info *pi;
 441         struct ice_hw *hw;
 442         int ret;
 443
 444         hw = &pf->hw;
 445         pi = hw->port_info;
 446         dcbcfg = kzalloc(sizeof(*dcbcfg), GFP_KERNEL);
 447         if (!dcbcfg)
 448                 return -ENOMEM;
 449
 450         memset(&pi->local_dcbx_cfg, 0, sizeof(*dcbcfg));
 451
 452         dcbcfg->etscfg.willing = ets_willing ? 1 : 0;
 453         dcbcfg->etscfg.maxtcs = hw->func_caps.common_cap.maxtc;
 454         dcbcfg->etscfg.tcbwtable[0] = 100;
 455         dcbcfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS;
 456
 457         memcpy(&dcbcfg->etsrec, &dcbcfg->etscfg,
 458                sizeof(dcbcfg->etsrec));
 459         dcbcfg->etsrec.willing = 0;
 460
 461         dcbcfg->pfc.willing = 1;
 462         dcbcfg->pfc.pfccap = hw->func_caps.common_cap.maxtc;
 463
 464         dcbcfg->numapps = 1;
 465         dcbcfg->app[0].selector = ICE_APP_SEL_ETHTYPE;
 466         dcbcfg->app[0].priority = 3;
 467         dcbcfg->app[0].prot_id = ICE_APP_PROT_ID_FCOE;
 468
 469         ret = ice_pf_dcb_cfg(pf, dcbcfg, locked);
 470         kfree(dcbcfg);
 471         if (ret)
 472                 return ret;
 473
 474         return ice_query_port_ets(pi, &buf, sizeof(buf), NULL);
 475 }
 476
 477 /**
 478  * ice_dcb_tc_contig - Check that TCs are contiguous
 479  * @prio_table: pointer to priority table
 480  *
 481  * Check if TCs begin with TC0 and are contiguous
 482  */
 483 static bool ice_dcb_tc_contig(u8 *prio_table)
 484 {
 485         u8 max_tc = 0;
 486         int i;
 487
 488         for (i = 0; i < CEE_DCBX_MAX_PRIO; i++) {
 489                 u8 cur_tc = prio_table[i];
 490
 491                 if (cur_tc > max_tc)
 492                         return false;
 493                 else if (cur_tc == max_tc)
 494                         max_tc++;
 495         }
 496
 497         return true;
 498 }
 499
 500 /**
 501  * ice_dcb_noncontig_cfg - Configure DCB for non-contiguous TCs
 502  * @pf: pointer to the PF struct
 503  *
 504  * If non-contiguous TCs, then configure SW DCB with TC0 and ETS non-willing
 505  */
 506 static int ice_dcb_noncontig_cfg(struct ice_pf *pf)
 507 {
 508         struct ice_dcbx_cfg *dcbcfg = &pf->hw.port_info->local_dcbx_cfg;
 509         struct device *dev = ice_pf_to_dev(pf);
 510         int ret;
 511
 512         /* Configure SW DCB default with ETS non-willing */
 513         ret = ice_dcb_sw_dflt_cfg(pf, false, true);
 514         if (ret) {
 515                 dev_err(dev, "Failed to set local DCB config %d\n", ret);
 516                 return ret;
 517         }
 518
 519         /* Reconfigure with ETS willing so that FW will send LLDP MIB event */
 520         dcbcfg->etscfg.willing = 1;
 521         ret = ice_set_dcb_cfg(pf->hw.port_info);
 522         if (ret)
 523                 dev_err(dev, "Failed to set DCB to unwilling\n");
 524
 525         return ret;
 526 }
 527
 528 /**
 529  * ice_pf_dcb_recfg - Reconfigure all VEBs and VSIs
 530  * @pf: pointer to the PF struct
 531  *
 532  * Assumed caller has already disabled all VSIs before
 533  * calling this function. Reconfiguring DCB based on
 534  * local_dcbx_cfg.
 535  */
 536 void ice_pf_dcb_recfg(struct ice_pf *pf)
 537 {
 538         struct ice_dcbx_cfg *dcbcfg = &pf->hw.port_info->local_dcbx_cfg;
 539         u8 tc_map = 0;
 540         int v, ret;
 541
 542         /* Update each VSI */
 543         ice_for_each_vsi(pf, v) {
 544                 struct ice_vsi *vsi = pf->vsi[v];
 545
 546                 if (!vsi)
 547                         continue;
 548
 549                 if (vsi->type == ICE_VSI_PF) {
 550                         tc_map = ice_dcb_get_ena_tc(dcbcfg);
 551
 552                         /* If DCBX request non-contiguous TC, then configure
 553                          * default TC
 554                          */
 555                         if (!ice_dcb_tc_contig(dcbcfg->etscfg.prio_table)) {
 556                                 tc_map = ICE_DFLT_TRAFFIC_CLASS;
 557                                 ice_dcb_noncontig_cfg(pf);
 558                         }
 559                 } else {
 560                         tc_map = ICE_DFLT_TRAFFIC_CLASS;
 561                 }
 562
 563                 ret = ice_vsi_cfg_tc(vsi, tc_map);
 564                 if (ret) {
 565                         dev_err(ice_pf_to_dev(pf), "Failed to config TC for VSI index: %d\n",
 566                                 vsi->idx);
 567                         continue;
 568                 }
 569
 570                 ice_vsi_map_rings_to_vectors(vsi);
 571                 if (vsi->type == ICE_VSI_PF)
 572                         ice_dcbnl_set_all(vsi);
 573         }
 574 }
 575
 576 /**
 577  * ice_init_pf_dcb - initialize DCB for a PF
 578  * @pf: PF to initialize DCB for
 579  * @locked: Was function called with RTNL held
 580  */
 581 int ice_init_pf_dcb(struct ice_pf *pf, bool locked)
 582 {
 583         struct device *dev = ice_pf_to_dev(pf);
 584         struct ice_port_info *port_info;
 585         struct ice_hw *hw = &pf->hw;
 586         int err;
 587
 588         port_info = hw->port_info;
 589
 590         err = ice_init_dcb(hw, false);
 591         if (err && !port_info->is_sw_lldp) {
 592                 dev_err(dev, "Error initializing DCB %d\n", err);
 593                 goto dcb_init_err;
 594         }
 595
 596         dev_info(dev,
 597                  "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n",
 598                  pf->hw.func_caps.common_cap.maxtc);
 599         if (err) {
 600                 struct ice_vsi *pf_vsi;
 601
 602                 /* FW LLDP is disabled, activate SW DCBX/LLDP mode */
 603                 dev_info(dev, "FW LLDP is disabled, DCBx/LLDP in SW mode.\n");
 604                 clear_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags);
 605                 err = ice_dcb_sw_dflt_cfg(pf, true, locked);
 606                 if (err) {
 607                         dev_err(dev,
 608                                 "Failed to set local DCB config %d\n", err);
 609                         err = -EIO;
 610                         goto dcb_init_err;
 611                 }
 612
 613                 /* If the FW DCBX engine is not running then Rx LLDP packets
 614                  * need to be redirected up the stack.
 615                  */
 616                 pf_vsi = ice_get_main_vsi(pf);
 617                 if (!pf_vsi) {
 618                         dev_err(dev, "Failed to set local DCB config\n");
 619                         err = -EIO;
 620                         goto dcb_init_err;
 621                 }
 622
 623                 ice_cfg_sw_lldp(pf_vsi, false, true);
 624
 625                 pf->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
 626                 return 0;
 627         }
 628
 629         set_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags);
 630
 631         /* DCBX in FW and LLDP enabled in FW */
 632         pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED | DCB_CAP_DCBX_VER_IEEE;
 633
 634         err = ice_dcb_init_cfg(pf, locked);
 635         if (err)
 636                 goto dcb_init_err;
 637
 638         return err;
 639
 640 dcb_init_err:
 641         dev_err(dev, "DCB init failed\n");
 642         return err;
 643 }
 644
 645 /**
 646  * ice_update_dcb_stats - Update DCB stats counters
 647  * @pf: PF whose stats needs to be updated
 648  */
 649 void ice_update_dcb_stats(struct ice_pf *pf)
 650 {
 651         struct ice_hw_port_stats *prev_ps, *cur_ps;
 652         struct ice_hw *hw = &pf->hw;
 653         u8 port;
 654         int i;
 655
 656         port = hw->port_info->lport;
 657         prev_ps = &pf->stats_prev;
 658         cur_ps = &pf->stats;
 659
 660         for (i = 0; i < 8; i++) {
 661                 ice_stat_update32(hw, GLPRT_PXOFFRXC(port, i),
 662                                   pf->stat_prev_loaded,
 663                                   &prev_ps->priority_xoff_rx[i],
 664                                   &cur_ps->priority_xoff_rx[i]);
 665                 ice_stat_update32(hw, GLPRT_PXONRXC(port, i),
 666                                   pf->stat_prev_loaded,
 667                                   &prev_ps->priority_xon_rx[i],
 668                                   &cur_ps->priority_xon_rx[i]);
 669                 ice_stat_update32(hw, GLPRT_PXONTXC(port, i),
 670                                   pf->stat_prev_loaded,
 671                                   &prev_ps->priority_xon_tx[i],
 672                                   &cur_ps->priority_xon_tx[i]);
 673                 ice_stat_update32(hw, GLPRT_PXOFFTXC(port, i),
 674                                   pf->stat_prev_loaded,
 675                                   &prev_ps->priority_xoff_tx[i],
 676                                   &cur_ps->priority_xoff_tx[i]);
 677                 ice_stat_update32(hw, GLPRT_RXON2OFFCNT(port, i),
 678                                   pf->stat_prev_loaded,
 679                                   &prev_ps->priority_xon_2_xoff[i],
 680                                   &cur_ps->priority_xon_2_xoff[i]);
 681         }
 682 }
 683
 684 /**
 685  * ice_tx_prepare_vlan_flags_dcb - prepare VLAN tagging for DCB
 686  * @tx_ring: ring to send buffer on
 687  * @first: pointer to struct ice_tx_buf
 688  */
 689 int
 690 ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring,
 691                               struct ice_tx_buf *first)
 692 {
 693         struct sk_buff *skb = first->skb;
 694
 695         if (!test_bit(ICE_FLAG_DCB_ENA, tx_ring->vsi->back->flags))
 696                 return 0;
 697
 698         /* Insert 802.1p priority into VLAN header */
 699         if ((first->tx_flags & (ICE_TX_FLAGS_HW_VLAN | ICE_TX_FLAGS_SW_VLAN)) ||
 700             skb->priority != TC_PRIO_CONTROL) {
 701                 first->tx_flags &= ~ICE_TX_FLAGS_VLAN_PR_M;
 702                 /* Mask the lower 3 bits to set the 802.1p priority */
 703                 first->tx_flags |= (skb->priority & 0x7) <<
 704                                    ICE_TX_FLAGS_VLAN_PR_S;
 705                 if (first->tx_flags & ICE_TX_FLAGS_SW_VLAN) {
 706                         struct vlan_ethhdr *vhdr;
 707                         int rc;
 708
 709                         rc = skb_cow_head(skb, 0);
 710                         if (rc < 0)
 711                                 return rc;
 712                         vhdr = (struct vlan_ethhdr *)skb->data;
 713                         vhdr->h_vlan_TCI = htons(first->tx_flags >>
 714                                                  ICE_TX_FLAGS_VLAN_S);
 715                 } else {
 716                         first->tx_flags |= ICE_TX_FLAGS_HW_VLAN;
 717                 }
 718         }
 719
 720         return 0;
 721 }
 722
 723 /**
 724  * ice_dcb_process_lldp_set_mib_change - Process MIB change
 725  * @pf: ptr to ice_pf
 726  * @event: pointer to the admin queue receive event
 727  */
 728 void
 729 ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf,
 730                                     struct ice_rq_event_info *event)
 731 {
 732         struct ice_aqc_port_ets_elem buf = { 0 };
 733         struct device *dev = ice_pf_to_dev(pf);
 734         struct ice_aqc_lldp_get_mib *mib;
 735         struct ice_dcbx_cfg tmp_dcbx_cfg;
 736         bool need_reconfig = false;
 737         struct ice_port_info *pi;
 738         struct ice_vsi *pf_vsi;
 739         u8 type;
 740         int ret;
 741
 742         /* Not DCB capable or capability disabled */
 743         if (!(test_bit(ICE_FLAG_DCB_CAPABLE, pf->flags)))
 744                 return;
 745
 746         if (pf->dcbx_cap & DCB_CAP_DCBX_HOST) {
 747                 dev_dbg(dev, "MIB Change Event in HOST mode\n");
 748                 return;
 749         }
 750
 751         pi = pf->hw.port_info;
 752         mib = (struct ice_aqc_lldp_get_mib *)&event->desc.params.raw;
 753         /* Ignore if event is not for Nearest Bridge */
 754         type = ((mib->type >> ICE_AQ_LLDP_BRID_TYPE_S) &
 755                 ICE_AQ_LLDP_BRID_TYPE_M);
 756         dev_dbg(dev, "LLDP event MIB bridge type 0x%x\n", type);
 757         if (type != ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID)
 758                 return;
 759
 760         /* Check MIB Type and return if event for Remote MIB update */
 761         type = mib->type & ICE_AQ_LLDP_MIB_TYPE_M;
 762         dev_dbg(dev, "LLDP event mib type %s\n", type ? "remote" : "local");
 763         if (type == ICE_AQ_LLDP_MIB_REMOTE) {
 764                 /* Update the remote cached instance and return */
 765                 ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_REMOTE,
 766                                          ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID,
 767                                          &pi->remote_dcbx_cfg);
 768                 if (ret) {
 769                         dev_err(dev, "Failed to get remote DCB config\n");
 770                         return;
 771                 }
 772         }
 773
 774         /* store the old configuration */
 775         tmp_dcbx_cfg = pf->hw.port_info->local_dcbx_cfg;
 776
 777         /* Reset the old DCBX configuration data */
 778         memset(&pi->local_dcbx_cfg, 0, sizeof(pi->local_dcbx_cfg));
 779
 780         /* Get updated DCBX data from firmware */
 781         ret = ice_get_dcb_cfg(pf->hw.port_info);
 782         if (ret) {
 783                 dev_err(dev, "Failed to get DCB config\n");
 784                 return;
 785         }
 786
 787         /* No change detected in DCBX configs */
 788         if (!memcmp(&tmp_dcbx_cfg, &pi->local_dcbx_cfg, sizeof(tmp_dcbx_cfg))) {
 789                 dev_dbg(dev, "No change detected in DCBX configuration.\n");
 790                 return;
 791         }
 792
 793         need_reconfig = ice_dcb_need_recfg(pf, &tmp_dcbx_cfg,
 794                                            &pi->local_dcbx_cfg);
 795         ice_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &pi->local_dcbx_cfg);
 796         if (!need_reconfig)
 797                 return;
 798
 799         /* Enable DCB tagging only when more than one TC */
 800         if (ice_dcb_get_num_tc(&pi->local_dcbx_cfg) > 1) {
 801                 dev_dbg(dev, "DCB tagging enabled (num TC > 1)\n");
 802                 set_bit(ICE_FLAG_DCB_ENA, pf->flags);
 803         } else {
 804                 dev_dbg(dev, "DCB tagging disabled (num TC = 1)\n");
 805                 clear_bit(ICE_FLAG_DCB_ENA, pf->flags);
 806         }
 807
 808         pf_vsi = ice_get_main_vsi(pf);
 809         if (!pf_vsi) {
 810                 dev_dbg(dev, "PF VSI doesn't exist\n");
 811                 return;
 812         }
 813
 814         rtnl_lock();
 815         ice_dis_vsi(pf_vsi, true);
 816
 817         ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
 818         if (ret) {
 819                 dev_err(dev, "Query Port ETS failed\n");
 820                 rtnl_unlock();
 821                 return;
 822         }
 823
 824         /* changes in configuration update VSI */
 825         ice_pf_dcb_recfg(pf);
 826
 827         ice_ena_vsi(pf_vsi, true);
 828         rtnl_unlock();
 829 }