drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c

   1 /* Broadcom NetXtreme-C/E network driver.
   2  *
   3  * Copyright (c) 2014-2016 Broadcom Corporation
   4  * Copyright (c) 2016-2017 Broadcom Limited
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation.
   9  */
  10
  11 #include <linux/netdevice.h>
  12 #include <linux/types.h>
  13 #include <linux/errno.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/pci.h>
  17 #include <linux/etherdevice.h>
  18 #include <rdma/ib_verbs.h>
  19 #include "bnxt_hsi.h"
  20 #include "bnxt.h"
  21 #include "bnxt_hwrm.h"
  22 #include "bnxt_dcb.h"
  23
  24 #ifdef CONFIG_BNXT_DCB
  25 static int bnxt_queue_to_tc(struct bnxt *bp, u8 queue_id)
  26 {
  27         int i, j;
  28
  29         for (i = 0; i < bp->max_tc; i++) {
  30                 if (bp->q_info[i].queue_id == queue_id) {
  31                         for (j = 0; j < bp->max_tc; j++) {
  32                                 if (bp->tc_to_qidx[j] == i)
  33                                         return j;
  34                         }
  35                 }
  36         }
  37         return -EINVAL;
  38 }
  39
  40 static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
  41 {
  42         struct hwrm_queue_pri2cos_cfg_input *req;
  43         u8 *pri2cos;
  44         int rc, i;
  45
  46         rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_CFG);
  47         if (rc)
  48                 return rc;
  49
  50         req->flags = cpu_to_le32(QUEUE_PRI2COS_CFG_REQ_FLAGS_PATH_BIDIR |
  51                                  QUEUE_PRI2COS_CFG_REQ_FLAGS_IVLAN);
  52
  53         pri2cos = &req->pri0_cos_queue_id;
  54         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  55                 u8 qidx;
  56
  57                 req->enables |= cpu_to_le32(
  58                         QUEUE_PRI2COS_CFG_REQ_ENABLES_PRI0_COS_QUEUE_ID << i);
  59
  60                 qidx = bp->tc_to_qidx[ets->prio_tc[i]];
  61                 pri2cos[i] = bp->q_info[qidx].queue_id;
  62         }
  63         return hwrm_req_send(bp, req);
  64 }
  65
  66 static int bnxt_hwrm_queue_pri2cos_qcfg(struct bnxt *bp, struct ieee_ets *ets)
  67 {
  68         struct hwrm_queue_pri2cos_qcfg_output *resp;
  69         struct hwrm_queue_pri2cos_qcfg_input *req;
  70         int rc;
  71
  72         rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_QCFG);
  73         if (rc)
  74                 return rc;
  75
  76         req->flags = cpu_to_le32(QUEUE_PRI2COS_QCFG_REQ_FLAGS_IVLAN);
  77         resp = hwrm_req_hold(bp, req);
  78         rc = hwrm_req_send(bp, req);
  79         if (!rc) {
  80                 u8 *pri2cos = &resp->pri0_cos_queue_id;
  81                 int i;
  82
  83                 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  84                         u8 queue_id = pri2cos[i];
  85                         int tc;
  86
  87                         tc = bnxt_queue_to_tc(bp, queue_id);
  88                         if (tc >= 0)
  89                                 ets->prio_tc[i] = tc;
  90                 }
  91         }
  92         hwrm_req_drop(bp, req);
  93         return rc;
  94 }
  95
  96 static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
  97                                       u8 max_tc)
  98 {
  99         struct hwrm_queue_cos2bw_cfg_input *req;
 100         struct bnxt_cos2bw_cfg cos2bw;
 101         int rc, i;
 102
 103         rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_CFG);
 104         if (rc)
 105                 return rc;
 106
 107         for (i = 0; i < max_tc; i++) {
 108                 u8 qidx = bp->tc_to_qidx[i];
 109
 110                 req->enables |= cpu_to_le32(
 111                         QUEUE_COS2BW_CFG_REQ_ENABLES_COS_QUEUE_ID0_VALID <<
 112                         qidx);
 113
 114                 memset(&cos2bw, 0, sizeof(cos2bw));
 115                 cos2bw.queue_id = bp->q_info[qidx].queue_id;
 116                 if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_STRICT) {
 117                         cos2bw.tsa =
 118                                 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP;
 119                         cos2bw.pri_lvl = i;
 120                 } else {
 121                         cos2bw.tsa =
 122                                 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_ETS;
 123                         cos2bw.bw_weight = ets->tc_tx_bw[i];
 124                         /* older firmware requires min_bw to be set to the
 125                          * same weight value in percent.
 126                          */
 127                         cos2bw.min_bw =
 128                                 cpu_to_le32((ets->tc_tx_bw[i] * 100) |
 129                                             BW_VALUE_UNIT_PERCENT1_100);
 130                 }
 131                 if (qidx == 0) {
 132                         req->queue_id0 = cos2bw.queue_id;
 133                         req->queue_id0_min_bw = cos2bw.min_bw;
 134                         req->queue_id0_max_bw = cos2bw.max_bw;
 135                         req->queue_id0_tsa_assign = cos2bw.tsa;
 136                         req->queue_id0_pri_lvl = cos2bw.pri_lvl;
 137                         req->queue_id0_bw_weight = cos2bw.bw_weight;
 138                 } else {
 139                         memcpy(&req->cfg[i - 1], &cos2bw.cfg, sizeof(cos2bw.cfg));
 140                 }
 141         }
 142         return hwrm_req_send(bp, req);
 143 }
 144
 145 static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
 146 {
 147         struct hwrm_queue_cos2bw_qcfg_output *resp;
 148         struct hwrm_queue_cos2bw_qcfg_input *req;
 149         struct bnxt_cos2bw_cfg cos2bw;
 150         int rc, i;
 151
 152         rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_QCFG);
 153         if (rc)
 154                 return rc;
 155
 156         resp = hwrm_req_hold(bp, req);
 157         rc = hwrm_req_send(bp, req);
 158         if (rc) {
 159                 hwrm_req_drop(bp, req);
 160                 return rc;
 161         }
 162
 163         for (i = 0; i < bp->max_tc; i++) {
 164                 int tc;
 165
 166                 if (i == 0) {
 167                         cos2bw.queue_id = resp->queue_id0;
 168                         cos2bw.min_bw = resp->queue_id0_min_bw;
 169                         cos2bw.max_bw = resp->queue_id0_max_bw;
 170                         cos2bw.tsa = resp->queue_id0_tsa_assign;
 171                         cos2bw.pri_lvl = resp->queue_id0_pri_lvl;
 172                         cos2bw.bw_weight = resp->queue_id0_bw_weight;
 173                 } else {
 174                         memcpy(&cos2bw.cfg, &resp->cfg[i - 1], sizeof(cos2bw.cfg));
 175                 }
 176
 177                 tc = bnxt_queue_to_tc(bp, cos2bw.queue_id);
 178                 if (tc < 0)
 179                         continue;
 180
 181                 if (cos2bw.tsa ==
 182                     QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP) {
 183                         ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_STRICT;
 184                 } else {
 185                         ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_ETS;
 186                         ets->tc_tx_bw[tc] = cos2bw.bw_weight;
 187                 }
 188         }
 189         hwrm_req_drop(bp, req);
 190         return 0;
 191 }
 192
 193 static int bnxt_queue_remap(struct bnxt *bp, unsigned int lltc_mask)
 194 {
 195         unsigned long qmap = 0;
 196         int max = bp->max_tc;
 197         int i, j, rc;
 198
 199         /* Assign lossless TCs first */
 200         for (i = 0, j = 0; i < max; ) {
 201                 if (lltc_mask & (1 << i)) {
 202                         if (BNXT_LLQ(bp->q_info[j].queue_profile)) {
 203                                 bp->tc_to_qidx[i] = j;
 204                                 __set_bit(j, &qmap);
 205                                 i++;
 206                         }
 207                         j++;
 208                         continue;
 209                 }
 210                 i++;
 211         }
 212
 213         for (i = 0, j = 0; i < max; i++) {
 214                 if (lltc_mask & (1 << i))
 215                         continue;
 216                 j = find_next_zero_bit(&qmap, max, j);
 217                 bp->tc_to_qidx[i] = j;
 218                 __set_bit(j, &qmap);
 219                 j++;
 220         }
 221
 222         if (netif_running(bp->dev)) {
 223                 bnxt_close_nic(bp, false, false);
 224                 rc = bnxt_open_nic(bp, false, false);
 225                 if (rc) {
 226                         netdev_warn(bp->dev, "failed to open NIC, rc = %d\n", rc);
 227                         return rc;
 228                 }
 229         }
 230         if (bp->ieee_ets) {
 231                 int tc = bp->num_tc;
 232
 233                 if (!tc)
 234                         tc = 1;
 235                 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, bp->ieee_ets, tc);
 236                 if (rc) {
 237                         netdev_warn(bp->dev, "failed to config BW, rc = %d\n", rc);
 238                         return rc;
 239                 }
 240                 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, bp->ieee_ets);
 241                 if (rc) {
 242                         netdev_warn(bp->dev, "failed to config prio, rc = %d\n", rc);
 243                         return rc;
 244                 }
 245         }
 246         return 0;
 247 }
 248
 249 static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
 250 {
 251         struct hwrm_queue_pfcenable_cfg_input *req;
 252         struct ieee_ets *my_ets = bp->ieee_ets;
 253         unsigned int tc_mask = 0, pri_mask = 0;
 254         u8 i, pri, lltc_count = 0;
 255         bool need_q_remap = false;
 256         int rc;
 257
 258         if (!my_ets)
 259                 return -EINVAL;
 260
 261         for (i = 0; i < bp->max_tc; i++) {
 262                 for (pri = 0; pri < IEEE_8021QAZ_MAX_TCS; pri++) {
 263                         if ((pfc->pfc_en & (1 << pri)) &&
 264                             (my_ets->prio_tc[pri] == i)) {
 265                                 pri_mask |= 1 << pri;
 266                                 tc_mask |= 1 << i;
 267                         }
 268                 }
 269                 if (tc_mask & (1 << i))
 270                         lltc_count++;
 271         }
 272         if (lltc_count > bp->max_lltc)
 273                 return -EINVAL;
 274
 275         for (i = 0; i < bp->max_tc; i++) {
 276                 if (tc_mask & (1 << i)) {
 277                         u8 qidx = bp->tc_to_qidx[i];
 278
 279                         if (!BNXT_LLQ(bp->q_info[qidx].queue_profile)) {
 280                                 need_q_remap = true;
 281                                 break;
 282                         }
 283                 }
 284         }
 285
 286         if (need_q_remap)
 287                 bnxt_queue_remap(bp, tc_mask);
 288
 289         rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_CFG);
 290         if (rc)
 291                 return rc;
 292
 293         req->flags = cpu_to_le32(pri_mask);
 294         return hwrm_req_send(bp, req);
 295 }
 296
 297 static int bnxt_hwrm_queue_pfc_qcfg(struct bnxt *bp, struct ieee_pfc *pfc)
 298 {
 299         struct hwrm_queue_pfcenable_qcfg_output *resp;
 300         struct hwrm_queue_pfcenable_qcfg_input *req;
 301         u8 pri_mask;
 302         int rc;
 303
 304         rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_QCFG);
 305         if (rc)
 306                 return rc;
 307
 308         resp = hwrm_req_hold(bp, req);
 309         rc = hwrm_req_send(bp, req);
 310         if (rc) {
 311                 hwrm_req_drop(bp, req);
 312                 return rc;
 313         }
 314
 315         pri_mask = le32_to_cpu(resp->flags);
 316         pfc->pfc_en = pri_mask;
 317         hwrm_req_drop(bp, req);
 318         return 0;
 319 }
 320
 321 static int bnxt_hwrm_set_dcbx_app(struct bnxt *bp, struct dcb_app *app,
 322                                   bool add)
 323 {
 324         struct hwrm_fw_set_structured_data_input *set;
 325         struct hwrm_fw_get_structured_data_input *get;
 326         struct hwrm_struct_data_dcbx_app *fw_app;
 327         struct hwrm_struct_hdr *data;
 328         dma_addr_t mapping;
 329         size_t data_len;
 330         int rc, n, i;
 331
 332         if (bp->hwrm_spec_code < 0x10601)
 333                 return 0;
 334
 335         rc = hwrm_req_init(bp, get, HWRM_FW_GET_STRUCTURED_DATA);
 336         if (rc)
 337                 return rc;
 338
 339         hwrm_req_hold(bp, get);
 340         hwrm_req_alloc_flags(bp, get, GFP_KERNEL | __GFP_ZERO);
 341
 342         n = IEEE_8021QAZ_MAX_TCS;
 343         data_len = sizeof(*data) + sizeof(*fw_app) * n;
 344         data = hwrm_req_dma_slice(bp, get, data_len, &mapping);
 345         if (!data) {
 346                 rc = -ENOMEM;
 347                 goto set_app_exit;
 348         }
 349
 350         get->dest_data_addr = cpu_to_le64(mapping);
 351         get->structure_id = cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP);
 352         get->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
 353         get->count = 0;
 354         rc = hwrm_req_send(bp, get);
 355         if (rc)
 356                 goto set_app_exit;
 357
 358         fw_app = (struct hwrm_struct_data_dcbx_app *)(data + 1);
 359
 360         if (data->struct_id != cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP)) {
 361                 rc = -ENODEV;
 362                 goto set_app_exit;
 363         }
 364
 365         n = data->count;
 366         for (i = 0; i < n; i++, fw_app++) {
 367                 if (fw_app->protocol_id == cpu_to_be16(app->protocol) &&
 368                     fw_app->protocol_selector == app->selector &&
 369                     fw_app->priority == app->priority) {
 370                         if (add)
 371                                 goto set_app_exit;
 372                         else
 373                                 break;
 374                 }
 375         }
 376         if (add) {
 377                 /* append */
 378                 n++;
 379                 fw_app->protocol_id = cpu_to_be16(app->protocol);
 380                 fw_app->protocol_selector = app->selector;
 381                 fw_app->priority = app->priority;
 382                 fw_app->valid = 1;
 383         } else {
 384                 size_t len = 0;
 385
 386                 /* not found, nothing to delete */
 387                 if (n == i)
 388                         goto set_app_exit;
 389
 390                 len = (n - 1 - i) * sizeof(*fw_app);
 391                 if (len)
 392                         memmove(fw_app, fw_app + 1, len);
 393                 n--;
 394                 memset(fw_app + n, 0, sizeof(*fw_app));
 395         }
 396         data->count = n;
 397         data->len = cpu_to_le16(sizeof(*fw_app) * n);
 398         data->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
 399
 400         rc = hwrm_req_init(bp, set, HWRM_FW_SET_STRUCTURED_DATA);
 401         if (rc)
 402                 goto set_app_exit;
 403
 404         set->src_data_addr = cpu_to_le64(mapping);
 405         set->data_len = cpu_to_le16(sizeof(*data) + sizeof(*fw_app) * n);
 406         set->hdr_cnt = 1;
 407         rc = hwrm_req_send(bp, set);
 408
 409 set_app_exit:
 410         hwrm_req_drop(bp, get); /* dropping get request and associated slice */
 411         return rc;
 412 }
 413
 414 static int bnxt_hwrm_queue_dscp_qcaps(struct bnxt *bp)
 415 {
 416         struct hwrm_queue_dscp_qcaps_output *resp;
 417         struct hwrm_queue_dscp_qcaps_input *req;
 418         int rc;
 419
 420         bp->max_dscp_value = 0;
 421         if (bp->hwrm_spec_code < 0x10800 || BNXT_VF(bp))
 422                 return 0;
 423
 424         rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP_QCAPS);
 425         if (rc)
 426                 return rc;
 427
 428         resp = hwrm_req_hold(bp, req);
 429         rc = hwrm_req_send_silent(bp, req);
 430         if (!rc) {
 431                 bp->max_dscp_value = (1 << resp->num_dscp_bits) - 1;
 432                 if (bp->max_dscp_value < 0x3f)
 433                         bp->max_dscp_value = 0;
 434         }
 435         hwrm_req_drop(bp, req);
 436         return rc;
 437 }
 438
 439 static int bnxt_hwrm_queue_dscp2pri_cfg(struct bnxt *bp, struct dcb_app *app,
 440                                         bool add)
 441 {
 442         struct hwrm_queue_dscp2pri_cfg_input *req;
 443         struct bnxt_dscp2pri_entry *dscp2pri;
 444         dma_addr_t mapping;
 445         int rc;
 446
 447         if (bp->hwrm_spec_code < 0x10800)
 448                 return 0;
 449
 450         rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP2PRI_CFG);
 451         if (rc)
 452                 return rc;
 453
 454         dscp2pri = hwrm_req_dma_slice(bp, req, sizeof(*dscp2pri), &mapping);
 455         if (!dscp2pri) {
 456                 hwrm_req_drop(bp, req);
 457                 return -ENOMEM;
 458         }
 459
 460         req->src_data_addr = cpu_to_le64(mapping);
 461         dscp2pri->dscp = app->protocol;
 462         if (add)
 463                 dscp2pri->mask = 0x3f;
 464         else
 465                 dscp2pri->mask = 0;
 466         dscp2pri->pri = app->priority;
 467         req->entry_cnt = cpu_to_le16(1);
 468         rc = hwrm_req_send(bp, req);
 469         return rc;
 470 }
 471
 472 static int bnxt_ets_validate(struct bnxt *bp, struct ieee_ets *ets, u8 *tc)
 473 {
 474         int total_ets_bw = 0;
 475         bool zero = false;
 476         u8 max_tc = 0;
 477         int i;
 478
 479         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
 480                 if (ets->prio_tc[i] > bp->max_tc) {
 481                         netdev_err(bp->dev, "priority to TC mapping exceeds TC count %d\n",
 482                                    ets->prio_tc[i]);
 483                         return -EINVAL;
 484                 }
 485                 if (ets->prio_tc[i] > max_tc)
 486                         max_tc = ets->prio_tc[i];
 487
 488                 if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && i > bp->max_tc)
 489                         return -EINVAL;
 490
 491                 switch (ets->tc_tsa[i]) {
 492                 case IEEE_8021QAZ_TSA_STRICT:
 493                         break;
 494                 case IEEE_8021QAZ_TSA_ETS:
 495                         total_ets_bw += ets->tc_tx_bw[i];
 496                         zero = zero || !ets->tc_tx_bw[i];
 497                         break;
 498                 default:
 499                         return -ENOTSUPP;
 500                 }
 501         }
 502         if (total_ets_bw > 100) {
 503                 netdev_warn(bp->dev, "rejecting ETS config exceeding available bandwidth\n");
 504                 return -EINVAL;
 505         }
 506         if (zero && total_ets_bw == 100) {
 507                 netdev_warn(bp->dev, "rejecting ETS config starving a TC\n");
 508                 return -EINVAL;
 509         }
 510
 511         if (max_tc >= bp->max_tc)
 512                 *tc = bp->max_tc;
 513         else
 514                 *tc = max_tc + 1;
 515         return 0;
 516 }
 517
 518 static int bnxt_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
 519 {
 520         struct bnxt *bp = netdev_priv(dev);
 521         struct ieee_ets *my_ets = bp->ieee_ets;
 522         int rc;
 523
 524         ets->ets_cap = bp->max_tc;
 525
 526         if (!my_ets) {
 527                 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
 528                         return 0;
 529
 530                 my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
 531                 if (!my_ets)
 532                         return -ENOMEM;
 533                 rc = bnxt_hwrm_queue_cos2bw_qcfg(bp, my_ets);
 534                 if (rc)
 535                         goto error;
 536                 rc = bnxt_hwrm_queue_pri2cos_qcfg(bp, my_ets);
 537                 if (rc)
 538                         goto error;
 539
 540                 /* cache result */
 541                 bp->ieee_ets = my_ets;
 542         }
 543
 544         ets->cbs = my_ets->cbs;
 545         memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
 546         memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
 547         memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
 548         memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
 549         return 0;
 550 error:
 551         kfree(my_ets);
 552         return rc;
 553 }
 554
 555 static int bnxt_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
 556 {
 557         struct bnxt *bp = netdev_priv(dev);
 558         struct ieee_ets *my_ets = bp->ieee_ets;
 559         u8 max_tc = 0;
 560         int rc, i;
 561
 562         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 563             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 564                 return -EINVAL;
 565
 566         rc = bnxt_ets_validate(bp, ets, &max_tc);
 567         if (!rc) {
 568                 if (!my_ets) {
 569                         my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
 570                         if (!my_ets)
 571                                 return -ENOMEM;
 572                         /* initialize PRI2TC mappings to invalid value */
 573                         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 574                                 my_ets->prio_tc[i] = IEEE_8021QAZ_MAX_TCS;
 575                         bp->ieee_ets = my_ets;
 576                 }
 577                 rc = bnxt_setup_mq_tc(dev, max_tc);
 578                 if (rc)
 579                         return rc;
 580                 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, ets, max_tc);
 581                 if (rc)
 582                         return rc;
 583                 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, ets);
 584                 if (rc)
 585                         return rc;
 586                 memcpy(my_ets, ets, sizeof(*my_ets));
 587         }
 588         return rc;
 589 }
 590
 591 static int bnxt_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
 592 {
 593         struct bnxt *bp = netdev_priv(dev);
 594         __le64 *stats = bp->port_stats.hw_stats;
 595         struct ieee_pfc *my_pfc = bp->ieee_pfc;
 596         long rx_off, tx_off;
 597         int i, rc;
 598
 599         pfc->pfc_cap = bp->max_lltc;
 600
 601         if (!my_pfc) {
 602                 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
 603                         return 0;
 604
 605                 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
 606                 if (!my_pfc)
 607                         return 0;
 608                 bp->ieee_pfc = my_pfc;
 609                 rc = bnxt_hwrm_queue_pfc_qcfg(bp, my_pfc);
 610                 if (rc)
 611                         return 0;
 612         }
 613
 614         pfc->pfc_en = my_pfc->pfc_en;
 615         pfc->mbc = my_pfc->mbc;
 616         pfc->delay = my_pfc->delay;
 617
 618         if (!stats)
 619                 return 0;
 620
 621         rx_off = BNXT_RX_STATS_OFFSET(rx_pfc_ena_frames_pri0);
 622         tx_off = BNXT_TX_STATS_OFFSET(tx_pfc_ena_frames_pri0);
 623         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++, rx_off++, tx_off++) {
 624                 pfc->requests[i] = le64_to_cpu(*(stats + tx_off));
 625                 pfc->indications[i] = le64_to_cpu(*(stats + rx_off));
 626         }
 627
 628         return 0;
 629 }
 630
 631 static int bnxt_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
 632 {
 633         struct bnxt *bp = netdev_priv(dev);
 634         struct ieee_pfc *my_pfc = bp->ieee_pfc;
 635         int rc;
 636
 637         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 638             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST) ||
 639             (bp->phy_flags & BNXT_PHY_FL_NO_PAUSE))
 640                 return -EINVAL;
 641
 642         if (!my_pfc) {
 643                 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
 644                 if (!my_pfc)
 645                         return -ENOMEM;
 646                 bp->ieee_pfc = my_pfc;
 647         }
 648         rc = bnxt_hwrm_queue_pfc_cfg(bp, pfc);
 649         if (!rc)
 650                 memcpy(my_pfc, pfc, sizeof(*my_pfc));
 651
 652         return rc;
 653 }
 654
 655 static int bnxt_dcbnl_ieee_dscp_app_prep(struct bnxt *bp, struct dcb_app *app)
 656 {
 657         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP) {
 658                 if (!bp->max_dscp_value)
 659                         return -ENOTSUPP;
 660                 if (app->protocol > bp->max_dscp_value)
 661                         return -EINVAL;
 662         }
 663         return 0;
 664 }
 665
 666 static int bnxt_dcbnl_ieee_setapp(struct net_device *dev, struct dcb_app *app)
 667 {
 668         struct bnxt *bp = netdev_priv(dev);
 669         int rc;
 670
 671         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 672             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 673                 return -EINVAL;
 674
 675         rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
 676         if (rc)
 677                 return rc;
 678
 679         rc = dcb_ieee_setapp(dev, app);
 680         if (rc)
 681                 return rc;
 682
 683         if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
 684              app->protocol == ETH_P_IBOE) ||
 685             (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
 686              app->protocol == ROCE_V2_UDP_DPORT))
 687                 rc = bnxt_hwrm_set_dcbx_app(bp, app, true);
 688
 689         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
 690                 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, true);
 691
 692         return rc;
 693 }
 694
 695 static int bnxt_dcbnl_ieee_delapp(struct net_device *dev, struct dcb_app *app)
 696 {
 697         struct bnxt *bp = netdev_priv(dev);
 698         int rc;
 699
 700         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 701             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 702                 return -EINVAL;
 703
 704         rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
 705         if (rc)
 706                 return rc;
 707
 708         rc = dcb_ieee_delapp(dev, app);
 709         if (rc)
 710                 return rc;
 711         if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
 712              app->protocol == ETH_P_IBOE) ||
 713             (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
 714              app->protocol == ROCE_V2_UDP_DPORT))
 715                 rc = bnxt_hwrm_set_dcbx_app(bp, app, false);
 716
 717         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
 718                 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, false);
 719
 720         return rc;
 721 }
 722
 723 static u8 bnxt_dcbnl_getdcbx(struct net_device *dev)
 724 {
 725         struct bnxt *bp = netdev_priv(dev);
 726
 727         return bp->dcbx_cap;
 728 }
 729
 730 static u8 bnxt_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 731 {
 732         struct bnxt *bp = netdev_priv(dev);
 733
 734         /* All firmware DCBX settings are set in NVRAM */
 735         if (bp->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
 736                 return 1;
 737
 738         if (mode & DCB_CAP_DCBX_HOST) {
 739                 if (BNXT_VF(bp) || (bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
 740                         return 1;
 741
 742                 /* only support IEEE */
 743                 if ((mode & DCB_CAP_DCBX_VER_CEE) ||
 744                     !(mode & DCB_CAP_DCBX_VER_IEEE))
 745                         return 1;
 746         }
 747
 748         if (mode == bp->dcbx_cap)
 749                 return 0;
 750
 751         bp->dcbx_cap = mode;
 752         return 0;
 753 }
 754
 755 static const struct dcbnl_rtnl_ops dcbnl_ops = {
 756         .ieee_getets    = bnxt_dcbnl_ieee_getets,
 757         .ieee_setets    = bnxt_dcbnl_ieee_setets,
 758         .ieee_getpfc    = bnxt_dcbnl_ieee_getpfc,
 759         .ieee_setpfc    = bnxt_dcbnl_ieee_setpfc,
 760         .ieee_setapp    = bnxt_dcbnl_ieee_setapp,
 761         .ieee_delapp    = bnxt_dcbnl_ieee_delapp,
 762         .getdcbx        = bnxt_dcbnl_getdcbx,
 763         .setdcbx        = bnxt_dcbnl_setdcbx,
 764 };
 765
 766 void bnxt_dcb_init(struct bnxt *bp)
 767 {
 768         bp->dcbx_cap = 0;
 769         if (bp->hwrm_spec_code < 0x10501)
 770                 return;
 771
 772         bnxt_hwrm_queue_dscp_qcaps(bp);
 773         bp->dcbx_cap = DCB_CAP_DCBX_VER_IEEE;
 774         if (BNXT_PF(bp) && !(bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
 775                 bp->dcbx_cap |= DCB_CAP_DCBX_HOST;
 776         else if (bp->fw_cap & BNXT_FW_CAP_DCBX_AGENT)
 777                 bp->dcbx_cap |= DCB_CAP_DCBX_LLD_MANAGED;
 778         bp->dev->dcbnl_ops = &dcbnl_ops;
 779 }
 780
 781 void bnxt_dcb_free(struct bnxt *bp)
 782 {
 783         kfree(bp->ieee_pfc);
 784         kfree(bp->ieee_ets);
 785         bp->ieee_pfc = NULL;
 786         bp->ieee_ets = NULL;
 787 }
 788
 789 #else
 790
 791 void bnxt_dcb_init(struct bnxt *bp)
 792 {
 793 }
 794
 795 void bnxt_dcb_free(struct bnxt *bp)
 796 {
 797 }
 798
 799 #endif