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