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_dcb.h"
  22
  23 #ifdef CONFIG_BNXT_DCB
  24 static int bnxt_queue_to_tc(struct bnxt *bp, u8 queue_id)
  25 {
  26         int i, j;
  27
  28         for (i = 0; i < bp->max_tc; i++) {
  29                 if (bp->q_info[i].queue_id == queue_id) {
  30                         for (j = 0; j < bp->max_tc; j++) {
  31                                 if (bp->tc_to_qidx[j] == i)
  32                                         return j;
  33                         }
  34                 }
  35         }
  36         return -EINVAL;
  37 }
  38
  39 static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
  40 {
  41         struct hwrm_queue_pri2cos_cfg_input req = {0};
  42         u8 *pri2cos;
  43         int i;
  44
  45         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PRI2COS_CFG, -1, -1);
  46         req.flags = cpu_to_le32(QUEUE_PRI2COS_CFG_REQ_FLAGS_PATH_BIDIR |
  47                                 QUEUE_PRI2COS_CFG_REQ_FLAGS_IVLAN);
  48
  49         pri2cos = &req.pri0_cos_queue_id;
  50         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  51                 u8 qidx;
  52
  53                 req.enables |= cpu_to_le32(
  54                         QUEUE_PRI2COS_CFG_REQ_ENABLES_PRI0_COS_QUEUE_ID << i);
  55
  56                 qidx = bp->tc_to_qidx[ets->prio_tc[i]];
  57                 pri2cos[i] = bp->q_info[qidx].queue_id;
  58         }
  59         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
  60 }
  61
  62 static int bnxt_hwrm_queue_pri2cos_qcfg(struct bnxt *bp, struct ieee_ets *ets)
  63 {
  64         struct hwrm_queue_pri2cos_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
  65         struct hwrm_queue_pri2cos_qcfg_input req = {0};
  66         int rc = 0;
  67
  68         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
  69         req.flags = cpu_to_le32(QUEUE_PRI2COS_QCFG_REQ_FLAGS_IVLAN);
  70
  71         mutex_lock(&bp->hwrm_cmd_lock);
  72         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
  73         if (!rc) {
  74                 u8 *pri2cos = &resp->pri0_cos_queue_id;
  75                 int i;
  76
  77                 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  78                         u8 queue_id = pri2cos[i];
  79                         int tc;
  80
  81                         tc = bnxt_queue_to_tc(bp, queue_id);
  82                         if (tc >= 0)
  83                                 ets->prio_tc[i] = tc;
  84                 }
  85         }
  86         mutex_unlock(&bp->hwrm_cmd_lock);
  87         return rc;
  88 }
  89
  90 static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
  91                                       u8 max_tc)
  92 {
  93         struct hwrm_queue_cos2bw_cfg_input req = {0};
  94         struct bnxt_cos2bw_cfg cos2bw;
  95         void *data;
  96         int i;
  97
  98         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_COS2BW_CFG, -1, -1);
  99         for (i = 0; i < max_tc; i++) {
 100                 u8 qidx = bp->tc_to_qidx[i];
 101
 102                 req.enables |= cpu_to_le32(
 103                         QUEUE_COS2BW_CFG_REQ_ENABLES_COS_QUEUE_ID0_VALID <<
 104                         qidx);
 105
 106                 memset(&cos2bw, 0, sizeof(cos2bw));
 107                 cos2bw.queue_id = bp->q_info[qidx].queue_id;
 108                 if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_STRICT) {
 109                         cos2bw.tsa =
 110                                 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP;
 111                         cos2bw.pri_lvl = i;
 112                 } else {
 113                         cos2bw.tsa =
 114                                 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_ETS;
 115                         cos2bw.bw_weight = ets->tc_tx_bw[i];
 116                         /* older firmware requires min_bw to be set to the
 117                          * same weight value in percent.
 118                          */
 119                         cos2bw.min_bw =
 120                                 cpu_to_le32((ets->tc_tx_bw[i] * 100) |
 121                                             BW_VALUE_UNIT_PERCENT1_100);
 122                 }
 123                 data = &req.unused_0 + qidx * (sizeof(cos2bw) - 4);
 124                 memcpy(data, &cos2bw.queue_id, sizeof(cos2bw) - 4);
 125                 if (qidx == 0) {
 126                         req.queue_id0 = cos2bw.queue_id;
 127                         req.unused_0 = 0;
 128                 }
 129         }
 130         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 131 }
 132
 133 static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
 134 {
 135         struct hwrm_queue_cos2bw_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
 136         struct hwrm_queue_cos2bw_qcfg_input req = {0};
 137         struct bnxt_cos2bw_cfg cos2bw;
 138         void *data;
 139         int rc, i;
 140
 141         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_COS2BW_QCFG, -1, -1);
 142
 143         mutex_lock(&bp->hwrm_cmd_lock);
 144         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 145         if (rc) {
 146                 mutex_unlock(&bp->hwrm_cmd_lock);
 147                 return rc;
 148         }
 149
 150         data = &resp->queue_id0 + offsetof(struct bnxt_cos2bw_cfg, queue_id);
 151         for (i = 0; i < bp->max_tc; i++, data += sizeof(cos2bw) - 4) {
 152                 int tc;
 153
 154                 memcpy(&cos2bw.queue_id, data, sizeof(cos2bw) - 4);
 155                 if (i == 0)
 156                         cos2bw.queue_id = resp->queue_id0;
 157
 158                 tc = bnxt_queue_to_tc(bp, cos2bw.queue_id);
 159                 if (tc < 0)
 160                         continue;
 161
 162                 if (cos2bw.tsa ==
 163                     QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP) {
 164                         ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_STRICT;
 165                 } else {
 166                         ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_ETS;
 167                         ets->tc_tx_bw[tc] = cos2bw.bw_weight;
 168                 }
 169         }
 170         mutex_unlock(&bp->hwrm_cmd_lock);
 171         return 0;
 172 }
 173
 174 static int bnxt_queue_remap(struct bnxt *bp, unsigned int lltc_mask)
 175 {
 176         unsigned long qmap = 0;
 177         int max = bp->max_tc;
 178         int i, j, rc;
 179
 180         /* Assign lossless TCs first */
 181         for (i = 0, j = 0; i < max; ) {
 182                 if (lltc_mask & (1 << i)) {
 183                         if (BNXT_LLQ(bp->q_info[j].queue_profile)) {
 184                                 bp->tc_to_qidx[i] = j;
 185                                 __set_bit(j, &qmap);
 186                                 i++;
 187                         }
 188                         j++;
 189                         continue;
 190                 }
 191                 i++;
 192         }
 193
 194         for (i = 0, j = 0; i < max; i++) {
 195                 if (lltc_mask & (1 << i))
 196                         continue;
 197                 j = find_next_zero_bit(&qmap, max, j);
 198                 bp->tc_to_qidx[i] = j;
 199                 __set_bit(j, &qmap);
 200                 j++;
 201         }
 202
 203         if (netif_running(bp->dev)) {
 204                 bnxt_close_nic(bp, false, false);
 205                 rc = bnxt_open_nic(bp, false, false);
 206                 if (rc) {
 207                         netdev_warn(bp->dev, "failed to open NIC, rc = %d\n", rc);
 208                         return rc;
 209                 }
 210         }
 211         if (bp->ieee_ets) {
 212                 int tc = netdev_get_num_tc(bp->dev);
 213
 214                 if (!tc)
 215                         tc = 1;
 216                 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, bp->ieee_ets, tc);
 217                 if (rc) {
 218                         netdev_warn(bp->dev, "failed to config BW, rc = %d\n", rc);
 219                         return rc;
 220                 }
 221                 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, bp->ieee_ets);
 222                 if (rc) {
 223                         netdev_warn(bp->dev, "failed to config prio, rc = %d\n", rc);
 224                         return rc;
 225                 }
 226         }
 227         return 0;
 228 }
 229
 230 static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
 231 {
 232         struct hwrm_queue_pfcenable_cfg_input req = {0};
 233         struct ieee_ets *my_ets = bp->ieee_ets;
 234         unsigned int tc_mask = 0, pri_mask = 0;
 235         u8 i, pri, lltc_count = 0;
 236         bool need_q_remap = false;
 237
 238         if (!my_ets)
 239                 return -EINVAL;
 240
 241         for (i = 0; i < bp->max_tc; i++) {
 242                 for (pri = 0; pri < IEEE_8021QAZ_MAX_TCS; pri++) {
 243                         if ((pfc->pfc_en & (1 << pri)) &&
 244                             (my_ets->prio_tc[pri] == i)) {
 245                                 pri_mask |= 1 << pri;
 246                                 tc_mask |= 1 << i;
 247                         }
 248                 }
 249                 if (tc_mask & (1 << i))
 250                         lltc_count++;
 251         }
 252         if (lltc_count > bp->max_lltc)
 253                 return -EINVAL;
 254
 255         for (i = 0; i < bp->max_tc; i++) {
 256                 if (tc_mask & (1 << i)) {
 257                         u8 qidx = bp->tc_to_qidx[i];
 258
 259                         if (!BNXT_LLQ(bp->q_info[qidx].queue_profile)) {
 260                                 need_q_remap = true;
 261                                 break;
 262                         }
 263                 }
 264         }
 265
 266         if (need_q_remap)
 267                 bnxt_queue_remap(bp, tc_mask);
 268
 269         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PFCENABLE_CFG, -1, -1);
 270         req.flags = cpu_to_le32(pri_mask);
 271         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 272 }
 273
 274 static int bnxt_hwrm_queue_pfc_qcfg(struct bnxt *bp, struct ieee_pfc *pfc)
 275 {
 276         struct hwrm_queue_pfcenable_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
 277         struct hwrm_queue_pfcenable_qcfg_input req = {0};
 278         u8 pri_mask;
 279         int rc;
 280
 281         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PFCENABLE_QCFG, -1, -1);
 282
 283         mutex_lock(&bp->hwrm_cmd_lock);
 284         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 285         if (rc) {
 286                 mutex_unlock(&bp->hwrm_cmd_lock);
 287                 return rc;
 288         }
 289
 290         pri_mask = le32_to_cpu(resp->flags);
 291         pfc->pfc_en = pri_mask;
 292         mutex_unlock(&bp->hwrm_cmd_lock);
 293         return 0;
 294 }
 295
 296 static int bnxt_hwrm_set_dcbx_app(struct bnxt *bp, struct dcb_app *app,
 297                                   bool add)
 298 {
 299         struct hwrm_fw_set_structured_data_input set = {0};
 300         struct hwrm_fw_get_structured_data_input get = {0};
 301         struct hwrm_struct_data_dcbx_app *fw_app;
 302         struct hwrm_struct_hdr *data;
 303         dma_addr_t mapping;
 304         size_t data_len;
 305         int rc, n, i;
 306
 307         if (bp->hwrm_spec_code < 0x10601)
 308                 return 0;
 309
 310         n = IEEE_8021QAZ_MAX_TCS;
 311         data_len = sizeof(*data) + sizeof(*fw_app) * n;
 312         data = dma_alloc_coherent(&bp->pdev->dev, data_len, &mapping,
 313                                   GFP_KERNEL);
 314         if (!data)
 315                 return -ENOMEM;
 316
 317         bnxt_hwrm_cmd_hdr_init(bp, &get, HWRM_FW_GET_STRUCTURED_DATA, -1, -1);
 318         get.dest_data_addr = cpu_to_le64(mapping);
 319         get.structure_id = cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP);
 320         get.subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
 321         get.count = 0;
 322         rc = hwrm_send_message(bp, &get, sizeof(get), HWRM_CMD_TIMEOUT);
 323         if (rc)
 324                 goto set_app_exit;
 325
 326         fw_app = (struct hwrm_struct_data_dcbx_app *)(data + 1);
 327
 328         if (data->struct_id != cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP)) {
 329                 rc = -ENODEV;
 330                 goto set_app_exit;
 331         }
 332
 333         n = data->count;
 334         for (i = 0; i < n; i++, fw_app++) {
 335                 if (fw_app->protocol_id == cpu_to_be16(app->protocol) &&
 336                     fw_app->protocol_selector == app->selector &&
 337                     fw_app->priority == app->priority) {
 338                         if (add)
 339                                 goto set_app_exit;
 340                         else
 341                                 break;
 342                 }
 343         }
 344         if (add) {
 345                 /* append */
 346                 n++;
 347                 fw_app->protocol_id = cpu_to_be16(app->protocol);
 348                 fw_app->protocol_selector = app->selector;
 349                 fw_app->priority = app->priority;
 350                 fw_app->valid = 1;
 351         } else {
 352                 size_t len = 0;
 353
 354                 /* not found, nothing to delete */
 355                 if (n == i)
 356                         goto set_app_exit;
 357
 358                 len = (n - 1 - i) * sizeof(*fw_app);
 359                 if (len)
 360                         memmove(fw_app, fw_app + 1, len);
 361                 n--;
 362                 memset(fw_app + n, 0, sizeof(*fw_app));
 363         }
 364         data->count = n;
 365         data->len = cpu_to_le16(sizeof(*fw_app) * n);
 366         data->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
 367
 368         bnxt_hwrm_cmd_hdr_init(bp, &set, HWRM_FW_SET_STRUCTURED_DATA, -1, -1);
 369         set.src_data_addr = cpu_to_le64(mapping);
 370         set.data_len = cpu_to_le16(sizeof(*data) + sizeof(*fw_app) * n);
 371         set.hdr_cnt = 1;
 372         rc = hwrm_send_message(bp, &set, sizeof(set), HWRM_CMD_TIMEOUT);
 373
 374 set_app_exit:
 375         dma_free_coherent(&bp->pdev->dev, data_len, data, mapping);
 376         return rc;
 377 }
 378
 379 static int bnxt_hwrm_queue_dscp_qcaps(struct bnxt *bp)
 380 {
 381         struct hwrm_queue_dscp_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
 382         struct hwrm_queue_dscp_qcaps_input req = {0};
 383         int rc;
 384
 385         bp->max_dscp_value = 0;
 386         if (bp->hwrm_spec_code < 0x10800 || BNXT_VF(bp))
 387                 return 0;
 388
 389         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_DSCP_QCAPS, -1, -1);
 390         mutex_lock(&bp->hwrm_cmd_lock);
 391         rc = _hwrm_send_message_silent(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 392         if (!rc) {
 393                 bp->max_dscp_value = (1 << resp->num_dscp_bits) - 1;
 394                 if (bp->max_dscp_value < 0x3f)
 395                         bp->max_dscp_value = 0;
 396         }
 397
 398         mutex_unlock(&bp->hwrm_cmd_lock);
 399         return rc;
 400 }
 401
 402 static int bnxt_hwrm_queue_dscp2pri_cfg(struct bnxt *bp, struct dcb_app *app,
 403                                         bool add)
 404 {
 405         struct hwrm_queue_dscp2pri_cfg_input req = {0};
 406         struct bnxt_dscp2pri_entry *dscp2pri;
 407         dma_addr_t mapping;
 408         int rc;
 409
 410         if (bp->hwrm_spec_code < 0x10800)
 411                 return 0;
 412
 413         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_DSCP2PRI_CFG, -1, -1);
 414         dscp2pri = dma_alloc_coherent(&bp->pdev->dev, sizeof(*dscp2pri),
 415                                       &mapping, GFP_KERNEL);
 416         if (!dscp2pri)
 417                 return -ENOMEM;
 418
 419         req.src_data_addr = cpu_to_le64(mapping);
 420         dscp2pri->dscp = app->protocol;
 421         if (add)
 422                 dscp2pri->mask = 0x3f;
 423         else
 424                 dscp2pri->mask = 0;
 425         dscp2pri->pri = app->priority;
 426         req.entry_cnt = cpu_to_le16(1);
 427         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 428         dma_free_coherent(&bp->pdev->dev, sizeof(*dscp2pri), dscp2pri,
 429                           mapping);
 430         return rc;
 431 }
 432
 433 static int bnxt_ets_validate(struct bnxt *bp, struct ieee_ets *ets, u8 *tc)
 434 {
 435         int total_ets_bw = 0;
 436         bool zero = false;
 437         u8 max_tc = 0;
 438         int i;
 439
 440         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
 441                 if (ets->prio_tc[i] > bp->max_tc) {
 442                         netdev_err(bp->dev, "priority to TC mapping exceeds TC count %d\n",
 443                                    ets->prio_tc[i]);
 444                         return -EINVAL;
 445                 }
 446                 if (ets->prio_tc[i] > max_tc)
 447                         max_tc = ets->prio_tc[i];
 448
 449                 if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && i > bp->max_tc)
 450                         return -EINVAL;
 451
 452                 switch (ets->tc_tsa[i]) {
 453                 case IEEE_8021QAZ_TSA_STRICT:
 454                         break;
 455                 case IEEE_8021QAZ_TSA_ETS:
 456                         total_ets_bw += ets->tc_tx_bw[i];
 457                         zero = zero || !ets->tc_tx_bw[i];
 458                         break;
 459                 default:
 460                         return -ENOTSUPP;
 461                 }
 462         }
 463         if (total_ets_bw > 100) {
 464                 netdev_warn(bp->dev, "rejecting ETS config exceeding available bandwidth\n");
 465                 return -EINVAL;
 466         }
 467         if (zero && total_ets_bw == 100) {
 468                 netdev_warn(bp->dev, "rejecting ETS config starving a TC\n");
 469                 return -EINVAL;
 470         }
 471
 472         if (max_tc >= bp->max_tc)
 473                 *tc = bp->max_tc;
 474         else
 475                 *tc = max_tc + 1;
 476         return 0;
 477 }
 478
 479 static int bnxt_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
 480 {
 481         struct bnxt *bp = netdev_priv(dev);
 482         struct ieee_ets *my_ets = bp->ieee_ets;
 483         int rc;
 484
 485         ets->ets_cap = bp->max_tc;
 486
 487         if (!my_ets) {
 488                 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
 489                         return 0;
 490
 491                 my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
 492                 if (!my_ets)
 493                         return -ENOMEM;
 494                 rc = bnxt_hwrm_queue_cos2bw_qcfg(bp, my_ets);
 495                 if (rc)
 496                         goto error;
 497                 rc = bnxt_hwrm_queue_pri2cos_qcfg(bp, my_ets);
 498                 if (rc)
 499                         goto error;
 500
 501                 /* cache result */
 502                 bp->ieee_ets = my_ets;
 503         }
 504
 505         ets->cbs = my_ets->cbs;
 506         memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
 507         memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
 508         memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
 509         memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
 510         return 0;
 511 error:
 512         kfree(my_ets);
 513         return rc;
 514 }
 515
 516 static int bnxt_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
 517 {
 518         struct bnxt *bp = netdev_priv(dev);
 519         struct ieee_ets *my_ets = bp->ieee_ets;
 520         u8 max_tc = 0;
 521         int rc, i;
 522
 523         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 524             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 525                 return -EINVAL;
 526
 527         rc = bnxt_ets_validate(bp, ets, &max_tc);
 528         if (!rc) {
 529                 if (!my_ets) {
 530                         my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
 531                         if (!my_ets)
 532                                 return -ENOMEM;
 533                         /* initialize PRI2TC mappings to invalid value */
 534                         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 535                                 my_ets->prio_tc[i] = IEEE_8021QAZ_MAX_TCS;
 536                         bp->ieee_ets = my_ets;
 537                 }
 538                 rc = bnxt_setup_mq_tc(dev, max_tc);
 539                 if (rc)
 540                         return rc;
 541                 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, ets, max_tc);
 542                 if (rc)
 543                         return rc;
 544                 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, ets);
 545                 if (rc)
 546                         return rc;
 547                 memcpy(my_ets, ets, sizeof(*my_ets));
 548         }
 549         return rc;
 550 }
 551
 552 static int bnxt_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
 553 {
 554         struct bnxt *bp = netdev_priv(dev);
 555         __le64 *stats = bp->port_stats.hw_stats;
 556         struct ieee_pfc *my_pfc = bp->ieee_pfc;
 557         long rx_off, tx_off;
 558         int i, rc;
 559
 560         pfc->pfc_cap = bp->max_lltc;
 561
 562         if (!my_pfc) {
 563                 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
 564                         return 0;
 565
 566                 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
 567                 if (!my_pfc)
 568                         return 0;
 569                 bp->ieee_pfc = my_pfc;
 570                 rc = bnxt_hwrm_queue_pfc_qcfg(bp, my_pfc);
 571                 if (rc)
 572                         return 0;
 573         }
 574
 575         pfc->pfc_en = my_pfc->pfc_en;
 576         pfc->mbc = my_pfc->mbc;
 577         pfc->delay = my_pfc->delay;
 578
 579         if (!stats)
 580                 return 0;
 581
 582         rx_off = BNXT_RX_STATS_OFFSET(rx_pfc_ena_frames_pri0);
 583         tx_off = BNXT_TX_STATS_OFFSET(tx_pfc_ena_frames_pri0);
 584         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++, rx_off++, tx_off++) {
 585                 pfc->requests[i] = le64_to_cpu(*(stats + tx_off));
 586                 pfc->indications[i] = le64_to_cpu(*(stats + rx_off));
 587         }
 588
 589         return 0;
 590 }
 591
 592 static int bnxt_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
 593 {
 594         struct bnxt *bp = netdev_priv(dev);
 595         struct ieee_pfc *my_pfc = bp->ieee_pfc;
 596         int rc;
 597
 598         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 599             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 600                 return -EINVAL;
 601
 602         if (!my_pfc) {
 603                 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
 604                 if (!my_pfc)
 605                         return -ENOMEM;
 606                 bp->ieee_pfc = my_pfc;
 607         }
 608         rc = bnxt_hwrm_queue_pfc_cfg(bp, pfc);
 609         if (!rc)
 610                 memcpy(my_pfc, pfc, sizeof(*my_pfc));
 611
 612         return rc;
 613 }
 614
 615 static int bnxt_dcbnl_ieee_dscp_app_prep(struct bnxt *bp, struct dcb_app *app)
 616 {
 617         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP) {
 618                 if (!bp->max_dscp_value)
 619                         return -ENOTSUPP;
 620                 if (app->protocol > bp->max_dscp_value)
 621                         return -EINVAL;
 622         }
 623         return 0;
 624 }
 625
 626 static int bnxt_dcbnl_ieee_setapp(struct net_device *dev, struct dcb_app *app)
 627 {
 628         struct bnxt *bp = netdev_priv(dev);
 629         int rc;
 630
 631         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 632             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 633                 return -EINVAL;
 634
 635         rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
 636         if (rc)
 637                 return rc;
 638
 639         rc = dcb_ieee_setapp(dev, app);
 640         if (rc)
 641                 return rc;
 642
 643         if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
 644              app->protocol == ETH_P_IBOE) ||
 645             (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
 646              app->protocol == ROCE_V2_UDP_DPORT))
 647                 rc = bnxt_hwrm_set_dcbx_app(bp, app, true);
 648
 649         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
 650                 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, true);
 651
 652         return rc;
 653 }
 654
 655 static int bnxt_dcbnl_ieee_delapp(struct net_device *dev, struct dcb_app *app)
 656 {
 657         struct bnxt *bp = netdev_priv(dev);
 658         int rc;
 659
 660         if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
 661             !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
 662                 return -EINVAL;
 663
 664         rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
 665         if (rc)
 666                 return rc;
 667
 668         rc = dcb_ieee_delapp(dev, app);
 669         if (rc)
 670                 return rc;
 671         if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
 672              app->protocol == ETH_P_IBOE) ||
 673             (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
 674              app->protocol == ROCE_V2_UDP_DPORT))
 675                 rc = bnxt_hwrm_set_dcbx_app(bp, app, false);
 676
 677         if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
 678                 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, false);
 679
 680         return rc;
 681 }
 682
 683 static u8 bnxt_dcbnl_getdcbx(struct net_device *dev)
 684 {
 685         struct bnxt *bp = netdev_priv(dev);
 686
 687         return bp->dcbx_cap;
 688 }
 689
 690 static u8 bnxt_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 691 {
 692         struct bnxt *bp = netdev_priv(dev);
 693
 694         /* All firmware DCBX settings are set in NVRAM */
 695         if (bp->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
 696                 return 1;
 697
 698         if (mode & DCB_CAP_DCBX_HOST) {
 699                 if (BNXT_VF(bp) || (bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
 700                         return 1;
 701
 702                 /* only support IEEE */
 703                 if ((mode & DCB_CAP_DCBX_VER_CEE) ||
 704                     !(mode & DCB_CAP_DCBX_VER_IEEE))
 705                         return 1;
 706         }
 707
 708         if (mode == bp->dcbx_cap)
 709                 return 0;
 710
 711         bp->dcbx_cap = mode;
 712         return 0;
 713 }
 714
 715 static const struct dcbnl_rtnl_ops dcbnl_ops = {
 716         .ieee_getets    = bnxt_dcbnl_ieee_getets,
 717         .ieee_setets    = bnxt_dcbnl_ieee_setets,
 718         .ieee_getpfc    = bnxt_dcbnl_ieee_getpfc,
 719         .ieee_setpfc    = bnxt_dcbnl_ieee_setpfc,
 720         .ieee_setapp    = bnxt_dcbnl_ieee_setapp,
 721         .ieee_delapp    = bnxt_dcbnl_ieee_delapp,
 722         .getdcbx        = bnxt_dcbnl_getdcbx,
 723         .setdcbx        = bnxt_dcbnl_setdcbx,
 724 };
 725
 726 void bnxt_dcb_init(struct bnxt *bp)
 727 {
 728         bp->dcbx_cap = 0;
 729         if (bp->hwrm_spec_code < 0x10501)
 730                 return;
 731
 732         bnxt_hwrm_queue_dscp_qcaps(bp);
 733         bp->dcbx_cap = DCB_CAP_DCBX_VER_IEEE;
 734         if (BNXT_PF(bp) && !(bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
 735                 bp->dcbx_cap |= DCB_CAP_DCBX_HOST;
 736         else if (bp->fw_cap & BNXT_FW_CAP_DCBX_AGENT)
 737                 bp->dcbx_cap |= DCB_CAP_DCBX_LLD_MANAGED;
 738         bp->dev->dcbnl_ops = &dcbnl_ops;
 739 }
 740
 741 void bnxt_dcb_free(struct bnxt *bp)
 742 {
 743         kfree(bp->ieee_pfc);
 744         kfree(bp->ieee_ets);
 745         bp->ieee_pfc = NULL;
 746         bp->ieee_ets = NULL;
 747 }
 748
 749 #else
 750
 751 void bnxt_dcb_init(struct bnxt *bp)
 752 {
 753 }
 754
 755 void bnxt_dcb_free(struct bnxt *bp)
 756 {
 757 }
 758
 759 #endif