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 } 830