drivers/net/enic/enic_vf_representor.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2019 Cisco Systems, Inc.  All rights reserved.
   3  */
   4
   5 #include <stdint.h>
   6 #include <stdio.h>
   7
   8 #include <rte_bus_pci.h>
   9 #include <rte_common.h>
  10 #include <rte_dev.h>
  11 #include <ethdev_driver.h>
  12 #include <ethdev_pci.h>
  13 #include <rte_flow_driver.h>
  14 #include <rte_kvargs.h>
  15 #include <rte_pci.h>
  16 #include <rte_string_fns.h>
  17
  18 #include "enic_compat.h"
  19 #include "enic.h"
  20 #include "vnic_dev.h"
  21 #include "vnic_enet.h"
  22 #include "vnic_intr.h"
  23 #include "vnic_cq.h"
  24 #include "vnic_wq.h"
  25 #include "vnic_rq.h"
  26
  27 static uint16_t enic_vf_recv_pkts(void *rx_queue,
  28                                   struct rte_mbuf **rx_pkts,
  29                                   uint16_t nb_pkts)
  30 {
  31         return enic_recv_pkts(rx_queue, rx_pkts, nb_pkts);
  32 }
  33
  34 static uint16_t enic_vf_xmit_pkts(void *tx_queue,
  35                                   struct rte_mbuf **tx_pkts,
  36                                   uint16_t nb_pkts)
  37 {
  38         return enic_xmit_pkts(tx_queue, tx_pkts, nb_pkts);
  39 }
  40
  41 static int enic_vf_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
  42         uint16_t queue_idx,
  43         uint16_t nb_desc,
  44         unsigned int socket_id,
  45         const struct rte_eth_txconf *tx_conf)
  46 {
  47         struct enic_vf_representor *vf;
  48         struct vnic_wq *wq;
  49         struct enic *pf;
  50         int err;
  51
  52         ENICPMD_FUNC_TRACE();
  53         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
  54                 return -E_RTE_SECONDARY;
  55         /* Only one queue now */
  56         if (queue_idx != 0)
  57                 return -EINVAL;
  58         vf = eth_dev->data->dev_private;
  59         pf = vf->pf;
  60         wq = &pf->wq[vf->pf_wq_idx];
  61         wq->offloads = tx_conf->offloads |
  62                 eth_dev->data->dev_conf.txmode.offloads;
  63         eth_dev->data->tx_queues[0] = (void *)wq;
  64         /* Pass vf not pf because of cq index calculation. See enic_alloc_wq */
  65         err = enic_alloc_wq(&vf->enic, queue_idx, socket_id, nb_desc);
  66         if (err) {
  67                 ENICPMD_LOG(ERR, "error in allocating wq\n");
  68                 return err;
  69         }
  70         return 0;
  71 }
  72
  73 static void enic_vf_dev_tx_queue_release(void *txq)
  74 {
  75         ENICPMD_FUNC_TRACE();
  76         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
  77                 return;
  78         enic_free_wq(txq);
  79 }
  80
  81 static int enic_vf_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
  82         uint16_t queue_idx,
  83         uint16_t nb_desc,
  84         unsigned int socket_id,
  85         const struct rte_eth_rxconf *rx_conf,
  86         struct rte_mempool *mp)
  87 {
  88         struct enic_vf_representor *vf;
  89         struct enic *pf;
  90         int ret;
  91
  92         ENICPMD_FUNC_TRACE();
  93         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
  94                 return -E_RTE_SECONDARY;
  95         /* Only 1 queue now */
  96         if (queue_idx != 0)
  97                 return -EINVAL;
  98         vf = eth_dev->data->dev_private;
  99         pf = vf->pf;
 100         eth_dev->data->rx_queues[queue_idx] =
 101                 (void *)&pf->rq[vf->pf_rq_sop_idx];
 102         ret = enic_alloc_rq(&vf->enic, queue_idx, socket_id, mp, nb_desc,
 103                             rx_conf->rx_free_thresh);
 104         if (ret) {
 105                 ENICPMD_LOG(ERR, "error in allocating rq\n");
 106                 return ret;
 107         }
 108         return 0;
 109 }
 110
 111 static void enic_vf_dev_rx_queue_release(void *rxq)
 112 {
 113         ENICPMD_FUNC_TRACE();
 114         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 115                 return;
 116         enic_free_rq(rxq);
 117 }
 118
 119 static int enic_vf_dev_configure(struct rte_eth_dev *eth_dev __rte_unused)
 120 {
 121         ENICPMD_FUNC_TRACE();
 122         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 123                 return -E_RTE_SECONDARY;
 124         return 0;
 125 }
 126
 127 static int
 128 setup_rep_vf_fwd(struct enic_vf_representor *vf)
 129 {
 130         int ret;
 131
 132         ENICPMD_FUNC_TRACE();
 133         /* Representor -> VF rule
 134          * Egress packets from this representor are on the representor's WQ.
 135          * So, loop back that WQ to VF.
 136          */
 137         ret = enic_fm_add_rep2vf_flow(vf);
 138         if (ret) {
 139                 ENICPMD_LOG(ERR, "Cannot create representor->VF flow");
 140                 return ret;
 141         }
 142         /* VF -> representor rule
 143          * Packets from VF loop back to the representor, unless they match
 144          * user-added flows.
 145          */
 146         ret = enic_fm_add_vf2rep_flow(vf);
 147         if (ret) {
 148                 ENICPMD_LOG(ERR, "Cannot create VF->representor flow");
 149                 return ret;
 150         }
 151         return 0;
 152 }
 153
 154 static int enic_vf_dev_start(struct rte_eth_dev *eth_dev)
 155 {
 156         struct enic_vf_representor *vf;
 157         struct vnic_rq *data_rq;
 158         int index, cq_idx;
 159         struct enic *pf;
 160         int ret;
 161
 162         ENICPMD_FUNC_TRACE();
 163         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 164                 return -E_RTE_SECONDARY;
 165
 166         vf = eth_dev->data->dev_private;
 167         pf = vf->pf;
 168         /* Get representor flowman for flow API and representor path */
 169         ret = enic_fm_init(&vf->enic);
 170         if (ret)
 171                 return ret;
 172         /* Set up implicit flow rules to forward between representor and VF */
 173         ret = setup_rep_vf_fwd(vf);
 174         if (ret) {
 175                 ENICPMD_LOG(ERR, "Cannot set up representor-VF flows");
 176                 return ret;
 177         }
 178         /* Remove all packet filters so no ingress packets go to VF.
 179          * When PF enables switchdev, it will ensure packet filters
 180          * are removed.  So, this is not technically needed.
 181          */
 182         ENICPMD_LOG(DEBUG, "Clear packet filters");
 183         ret = vnic_dev_packet_filter(vf->enic.vdev, 0, 0, 0, 0, 0);
 184         if (ret) {
 185                 ENICPMD_LOG(ERR, "Cannot clear packet filters");
 186                 return ret;
 187         }
 188
 189         /* Start WQ: see enic_init_vnic_resources */
 190         index = vf->pf_wq_idx;
 191         cq_idx = vf->pf_wq_cq_idx;
 192         vnic_wq_init(&pf->wq[index], cq_idx, 1, 0);
 193         vnic_cq_init(&pf->cq[cq_idx],
 194                      0 /* flow_control_enable */,
 195                      1 /* color_enable */,
 196                      0 /* cq_head */,
 197                      0 /* cq_tail */,
 198                      1 /* cq_tail_color */,
 199                      0 /* interrupt_enable */,
 200                      0 /* cq_entry_enable */,
 201                      1 /* cq_message_enable */,
 202                      0 /* interrupt offset */,
 203                      (uint64_t)pf->wq[index].cqmsg_rz->iova);
 204         /* enic_start_wq */
 205         vnic_wq_enable(&pf->wq[index]);
 206         eth_dev->data->tx_queue_state[0] = RTE_ETH_QUEUE_STATE_STARTED;
 207
 208         /* Start RQ: see enic_init_vnic_resources */
 209         index = vf->pf_rq_sop_idx;
 210         cq_idx = enic_cq_rq(vf->pf, index);
 211         vnic_rq_init(&pf->rq[index], cq_idx, 1, 0);
 212         data_rq = &pf->rq[vf->pf_rq_data_idx];
 213         if (data_rq->in_use)
 214                 vnic_rq_init(data_rq, cq_idx, 1, 0);
 215         vnic_cq_init(&pf->cq[cq_idx],
 216                      0 /* flow_control_enable */,
 217                      1 /* color_enable */,
 218                      0 /* cq_head */,
 219                      0 /* cq_tail */,
 220                      1 /* cq_tail_color */,
 221                      0,
 222                      1 /* cq_entry_enable */,
 223                      0 /* cq_message_enable */,
 224                      0,
 225                      0 /* cq_message_addr */);
 226         /* enic_enable */
 227         ret = enic_alloc_rx_queue_mbufs(pf, &pf->rq[index]);
 228         if (ret) {
 229                 ENICPMD_LOG(ERR, "Failed to alloc sop RX queue mbufs\n");
 230                 return ret;
 231         }
 232         ret = enic_alloc_rx_queue_mbufs(pf, data_rq);
 233         if (ret) {
 234                 /* Release the allocated mbufs for the sop rq*/
 235                 enic_rxmbuf_queue_release(pf, &pf->rq[index]);
 236                 ENICPMD_LOG(ERR, "Failed to alloc data RX queue mbufs\n");
 237                 return ret;
 238         }
 239         enic_start_rq(pf, vf->pf_rq_sop_idx);
 240         eth_dev->data->tx_queue_state[0] = RTE_ETH_QUEUE_STATE_STARTED;
 241         eth_dev->data->rx_queue_state[0] = RTE_ETH_QUEUE_STATE_STARTED;
 242         return 0;
 243 }
 244
 245 static int enic_vf_dev_stop(struct rte_eth_dev *eth_dev)
 246 {
 247         struct enic_vf_representor *vf;
 248         struct vnic_rq *rq;
 249         struct enic *pf;
 250
 251         ENICPMD_FUNC_TRACE();
 252         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 253                 return 0;
 254         /* Undo dev_start. Disable/clean WQ */
 255         vf = eth_dev->data->dev_private;
 256         pf = vf->pf;
 257         vnic_wq_disable(&pf->wq[vf->pf_wq_idx]);
 258         vnic_wq_clean(&pf->wq[vf->pf_wq_idx], enic_free_wq_buf);
 259         vnic_cq_clean(&pf->cq[vf->pf_wq_cq_idx]);
 260         /* Disable/clean RQ */
 261         rq = &pf->rq[vf->pf_rq_sop_idx];
 262         vnic_rq_disable(rq);
 263         vnic_rq_clean(rq, enic_free_rq_buf);
 264         rq = &pf->rq[vf->pf_rq_data_idx];
 265         if (rq->in_use) {
 266                 vnic_rq_disable(rq);
 267                 vnic_rq_clean(rq, enic_free_rq_buf);
 268         }
 269         vnic_cq_clean(&pf->cq[enic_cq_rq(vf->pf, vf->pf_rq_sop_idx)]);
 270         eth_dev->data->tx_queue_state[0] = RTE_ETH_QUEUE_STATE_STOPPED;
 271         eth_dev->data->rx_queue_state[0] = RTE_ETH_QUEUE_STATE_STOPPED;
 272         /* Clean up representor flowman */
 273         enic_fm_destroy(&vf->enic);
 274
 275         return 0;
 276 }
 277
 278 /*
 279  * "close" is no-op for now and solely exists so that rte_eth_dev_close()
 280  * can finish its own cleanup without errors.
 281  */
 282 static int enic_vf_dev_close(struct rte_eth_dev *eth_dev __rte_unused)
 283 {
 284         ENICPMD_FUNC_TRACE();
 285         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 286                 return 0;
 287         return 0;
 288 }
 289
 290 static int
 291 adjust_flow_attr(const struct rte_flow_attr *attrs,
 292                  struct rte_flow_attr *vf_attrs,
 293                  struct rte_flow_error *error)
 294 {
 295         if (!attrs) {
 296                 return rte_flow_error_set(error, EINVAL,
 297                                 RTE_FLOW_ERROR_TYPE_ATTR,
 298                                 NULL, "no attribute specified");
 299         }
 300         /*
 301          * Swap ingress and egress as the firmware view of direction
 302          * is the opposite of the representor.
 303          */
 304         *vf_attrs = *attrs;
 305         if (attrs->ingress && !attrs->egress) {
 306                 vf_attrs->ingress = 0;
 307                 vf_attrs->egress = 1;
 308                 return 0;
 309         }
 310         return rte_flow_error_set(error, ENOTSUP,
 311                         RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, NULL,
 312                         "representor only supports ingress");
 313 }
 314
 315 static int
 316 enic_vf_flow_validate(struct rte_eth_dev *dev,
 317                       const struct rte_flow_attr *attrs,
 318                       const struct rte_flow_item pattern[],
 319                       const struct rte_flow_action actions[],
 320                       struct rte_flow_error *error)
 321 {
 322         struct rte_flow_attr vf_attrs;
 323         int ret;
 324
 325         ret = adjust_flow_attr(attrs, &vf_attrs, error);
 326         if (ret)
 327                 return ret;
 328         attrs = &vf_attrs;
 329         return enic_fm_flow_ops.validate(dev, attrs, pattern, actions, error);
 330 }
 331
 332 static struct rte_flow *
 333 enic_vf_flow_create(struct rte_eth_dev *dev,
 334                     const struct rte_flow_attr *attrs,
 335                     const struct rte_flow_item pattern[],
 336                     const struct rte_flow_action actions[],
 337                     struct rte_flow_error *error)
 338 {
 339         struct rte_flow_attr vf_attrs;
 340
 341         if (adjust_flow_attr(attrs, &vf_attrs, error))
 342                 return NULL;
 343         attrs = &vf_attrs;
 344         return enic_fm_flow_ops.create(dev, attrs, pattern, actions, error);
 345 }
 346
 347 static int
 348 enic_vf_flow_destroy(struct rte_eth_dev *dev, struct rte_flow *flow,
 349                      struct rte_flow_error *error)
 350 {
 351         return enic_fm_flow_ops.destroy(dev, flow, error);
 352 }
 353
 354 static int
 355 enic_vf_flow_query(struct rte_eth_dev *dev,
 356                    struct rte_flow *flow,
 357                    const struct rte_flow_action *actions,
 358                    void *data,
 359                    struct rte_flow_error *error)
 360 {
 361         return enic_fm_flow_ops.query(dev, flow, actions, data, error);
 362 }
 363
 364 static int
 365 enic_vf_flow_flush(struct rte_eth_dev *dev,
 366                    struct rte_flow_error *error)
 367 {
 368         return enic_fm_flow_ops.flush(dev, error);
 369 }
 370
 371 static const struct rte_flow_ops enic_vf_flow_ops = {
 372         .validate = enic_vf_flow_validate,
 373         .create = enic_vf_flow_create,
 374         .destroy = enic_vf_flow_destroy,
 375         .flush = enic_vf_flow_flush,
 376         .query = enic_vf_flow_query,
 377 };
 378
 379 static int
 380 enic_vf_flow_ops_get(struct rte_eth_dev *eth_dev,
 381                      const struct rte_flow_ops **ops)
 382 {
 383         struct enic_vf_representor *vf;
 384
 385         ENICPMD_FUNC_TRACE();
 386         vf = eth_dev->data->dev_private;
 387         if (vf->enic.flow_filter_mode != FILTER_FLOWMAN) {
 388                 ENICPMD_LOG(WARNING,
 389                                 "VF representors require flowman support for rte_flow API");
 390                 return -EINVAL;
 391         }
 392
 393         *ops = &enic_vf_flow_ops;
 394         return 0;
 395 }
 396
 397 static int enic_vf_link_update(struct rte_eth_dev *eth_dev,
 398         int wait_to_complete __rte_unused)
 399 {
 400         struct enic_vf_representor *vf;
 401         struct rte_eth_link link;
 402         struct enic *pf;
 403
 404         ENICPMD_FUNC_TRACE();
 405         vf = eth_dev->data->dev_private;
 406         pf = vf->pf;
 407         /*
 408          * Link status and speed are same as PF. Update PF status and then
 409          * copy it to VF.
 410          */
 411         enic_link_update(pf->rte_dev);
 412         rte_eth_linkstatus_get(pf->rte_dev, &link);
 413         rte_eth_linkstatus_set(eth_dev, &link);
 414         return 0;
 415 }
 416
 417 static int enic_vf_stats_get(struct rte_eth_dev *eth_dev,
 418         struct rte_eth_stats *stats)
 419 {
 420         struct enic_vf_representor *vf;
 421         struct vnic_stats *vs;
 422         int err;
 423
 424         ENICPMD_FUNC_TRACE();
 425         vf = eth_dev->data->dev_private;
 426         /* Get VF stats via PF */
 427         err = vnic_dev_stats_dump(vf->enic.vdev, &vs);
 428         if (err) {
 429                 ENICPMD_LOG(ERR, "error in getting stats\n");
 430                 return err;
 431         }
 432         stats->ipackets = vs->rx.rx_frames_ok;
 433         stats->opackets = vs->tx.tx_frames_ok;
 434         stats->ibytes = vs->rx.rx_bytes_ok;
 435         stats->obytes = vs->tx.tx_bytes_ok;
 436         stats->ierrors = vs->rx.rx_errors + vs->rx.rx_drop;
 437         stats->oerrors = vs->tx.tx_errors;
 438         stats->imissed = vs->rx.rx_no_bufs;
 439         return 0;
 440 }
 441
 442 static int enic_vf_stats_reset(struct rte_eth_dev *eth_dev)
 443 {
 444         struct enic_vf_representor *vf;
 445         int err;
 446
 447         ENICPMD_FUNC_TRACE();
 448         vf = eth_dev->data->dev_private;
 449         /* Ask PF to clear VF stats */
 450         err = vnic_dev_stats_clear(vf->enic.vdev);
 451         if (err)
 452                 ENICPMD_LOG(ERR, "error in clearing stats\n");
 453         return err;
 454 }
 455
 456 static int enic_vf_dev_infos_get(struct rte_eth_dev *eth_dev,
 457         struct rte_eth_dev_info *device_info)
 458 {
 459         struct enic_vf_representor *vf;
 460         struct enic *pf;
 461
 462         ENICPMD_FUNC_TRACE();
 463         vf = eth_dev->data->dev_private;
 464         pf = vf->pf;
 465         device_info->max_rx_queues = eth_dev->data->nb_rx_queues;
 466         device_info->max_tx_queues = eth_dev->data->nb_tx_queues;
 467         device_info->min_rx_bufsize = ENIC_MIN_MTU;
 468         /* Max packet size is same as PF */
 469         device_info->max_rx_pktlen = enic_mtu_to_max_rx_pktlen(pf->max_mtu);
 470         device_info->max_mac_addrs = ENIC_UNICAST_PERFECT_FILTERS;
 471         /* No offload capa, RSS, etc. until Tx/Rx handlers are added */
 472         device_info->rx_offload_capa = 0;
 473         device_info->tx_offload_capa = 0;
 474         device_info->switch_info.name = pf->rte_dev->device->name;
 475         device_info->switch_info.domain_id = vf->switch_domain_id;
 476         device_info->switch_info.port_id = vf->vf_id;
 477         return 0;
 478 }
 479
 480 static void set_vf_packet_filter(struct enic_vf_representor *vf)
 481 {
 482         /* switchdev: packet filters are ignored */
 483         if (vf->enic.switchdev_mode)
 484                 return;
 485         /* Ask PF to apply filters on VF */
 486         vnic_dev_packet_filter(vf->enic.vdev, 1 /* unicast */, 1 /* mcast */,
 487                 1 /* bcast */, vf->promisc, vf->allmulti);
 488 }
 489
 490 static int enic_vf_promiscuous_enable(struct rte_eth_dev *eth_dev)
 491 {
 492         struct enic_vf_representor *vf;
 493
 494         ENICPMD_FUNC_TRACE();
 495         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 496                 return -E_RTE_SECONDARY;
 497         vf = eth_dev->data->dev_private;
 498         vf->promisc = 1;
 499         set_vf_packet_filter(vf);
 500         return 0;
 501 }
 502
 503 static int enic_vf_promiscuous_disable(struct rte_eth_dev *eth_dev)
 504 {
 505         struct enic_vf_representor *vf;
 506
 507         ENICPMD_FUNC_TRACE();
 508         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 509                 return -E_RTE_SECONDARY;
 510         vf = eth_dev->data->dev_private;
 511         vf->promisc = 0;
 512         set_vf_packet_filter(vf);
 513         return 0;
 514 }
 515
 516 static int enic_vf_allmulticast_enable(struct rte_eth_dev *eth_dev)
 517 {
 518         struct enic_vf_representor *vf;
 519
 520         ENICPMD_FUNC_TRACE();
 521         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 522                 return -E_RTE_SECONDARY;
 523         vf = eth_dev->data->dev_private;
 524         vf->allmulti = 1;
 525         set_vf_packet_filter(vf);
 526         return 0;
 527 }
 528
 529 static int enic_vf_allmulticast_disable(struct rte_eth_dev *eth_dev)
 530 {
 531         struct enic_vf_representor *vf;
 532
 533         ENICPMD_FUNC_TRACE();
 534         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 535                 return -E_RTE_SECONDARY;
 536         vf = eth_dev->data->dev_private;
 537         vf->allmulti = 0;
 538         set_vf_packet_filter(vf);
 539         return 0;
 540 }
 541
 542 /*
 543  * A minimal set of handlers.
 544  * The representor can get/set a small set of VF settings via "proxy" devcmd.
 545  * With proxy devcmd, the PF driver basically tells the VIC firmware to
 546  * "perform this devcmd on that VF".
 547  */
 548 static const struct eth_dev_ops enic_vf_representor_dev_ops = {
 549         .allmulticast_enable  = enic_vf_allmulticast_enable,
 550         .allmulticast_disable = enic_vf_allmulticast_disable,
 551         .dev_configure        = enic_vf_dev_configure,
 552         .dev_infos_get        = enic_vf_dev_infos_get,
 553         .dev_start            = enic_vf_dev_start,
 554         .dev_stop             = enic_vf_dev_stop,
 555         .dev_close            = enic_vf_dev_close,
 556         .flow_ops_get         = enic_vf_flow_ops_get,
 557         .link_update          = enic_vf_link_update,
 558         .promiscuous_enable   = enic_vf_promiscuous_enable,
 559         .promiscuous_disable  = enic_vf_promiscuous_disable,
 560         .stats_get            = enic_vf_stats_get,
 561         .stats_reset          = enic_vf_stats_reset,
 562         .rx_queue_setup       = enic_vf_dev_rx_queue_setup,
 563         .rx_queue_release     = enic_vf_dev_rx_queue_release,
 564         .tx_queue_setup       = enic_vf_dev_tx_queue_setup,
 565         .tx_queue_release     = enic_vf_dev_tx_queue_release,
 566 };
 567
 568 static int get_vf_config(struct enic_vf_representor *vf)
 569 {
 570         struct vnic_enet_config *c;
 571         struct enic *pf;
 572         int switch_mtu;
 573         int err;
 574
 575         c = &vf->config;
 576         pf = vf->pf;
 577         /* VF MAC */
 578         err = vnic_dev_get_mac_addr(vf->enic.vdev, vf->mac_addr.addr_bytes);
 579         if (err) {
 580                 ENICPMD_LOG(ERR, "error in getting MAC address\n");
 581                 return err;
 582         }
 583         rte_ether_addr_copy(&vf->mac_addr, vf->eth_dev->data->mac_addrs);
 584
 585         /* VF MTU per its vNIC setting */
 586         err = vnic_dev_spec(vf->enic.vdev,
 587                             offsetof(struct vnic_enet_config, mtu),
 588                             sizeof(c->mtu), &c->mtu);
 589         if (err) {
 590                 ENICPMD_LOG(ERR, "error in getting MTU\n");
 591                 return err;
 592         }
 593         /*
 594          * Blade switch (fabric interconnect) port's MTU. Assume the kernel
 595          * enic driver runs on VF. That driver automatically adjusts its MTU
 596          * according to the switch MTU.
 597          */
 598         switch_mtu = vnic_dev_mtu(pf->vdev);
 599         vf->eth_dev->data->mtu = c->mtu;
 600         if (switch_mtu > c->mtu)
 601                 vf->eth_dev->data->mtu = RTE_MIN(ENIC_MAX_MTU, switch_mtu);
 602         return 0;
 603 }
 604
 605 int enic_vf_representor_init(struct rte_eth_dev *eth_dev, void *init_params)
 606 {
 607         struct enic_vf_representor *vf, *params;
 608         struct rte_pci_device *pdev;
 609         struct enic *pf, *vf_enic;
 610         struct rte_pci_addr *addr;
 611         int ret;
 612
 613         ENICPMD_FUNC_TRACE();
 614         params = init_params;
 615         vf = eth_dev->data->dev_private;
 616         vf->switch_domain_id = params->switch_domain_id;
 617         vf->vf_id = params->vf_id;
 618         vf->eth_dev = eth_dev;
 619         vf->pf = params->pf;
 620         vf->allmulti = 1;
 621         vf->promisc = 0;
 622         pf = vf->pf;
 623         vf->enic.switchdev_mode = pf->switchdev_mode;
 624         /* Only switchdev is supported now */
 625         RTE_ASSERT(vf->enic.switchdev_mode);
 626         /* Allocate WQ, RQ, CQ for the representor */
 627         vf->pf_wq_idx = vf_wq_idx(vf);
 628         vf->pf_wq_cq_idx = vf_wq_cq_idx(vf);
 629         vf->pf_rq_sop_idx = vf_rq_sop_idx(vf);
 630         vf->pf_rq_data_idx = vf_rq_data_idx(vf);
 631         /* Remove these assertions once queue allocation has an easy-to-use
 632          * allocator API instead of index number calculations used throughout
 633          * the driver..
 634          */
 635         RTE_ASSERT(enic_cq_rq(pf, vf->pf_rq_sop_idx) == vf->pf_rq_sop_idx);
 636         RTE_ASSERT(enic_rte_rq_idx_to_sop_idx(vf->pf_rq_sop_idx) ==
 637                    vf->pf_rq_sop_idx);
 638         /* RX handlers use enic_cq_rq(sop) to get CQ, so do not save it */
 639         pf->vf_required_wq++;
 640         pf->vf_required_rq += 2; /* sop and data */
 641         pf->vf_required_cq += 2; /* 1 for rq sop and 1 for wq */
 642         ENICPMD_LOG(DEBUG, "vf_id %u wq %u rq_sop %u rq_data %u wq_cq %u rq_cq %u",
 643                 vf->vf_id, vf->pf_wq_idx, vf->pf_rq_sop_idx, vf->pf_rq_data_idx,
 644                 vf->pf_wq_cq_idx, enic_cq_rq(pf, vf->pf_rq_sop_idx));
 645         if (enic_cq_rq(pf, vf->pf_rq_sop_idx) >= pf->conf_cq_count) {
 646                 ENICPMD_LOG(ERR, "Insufficient CQs. Please ensure number of CQs (%u)"
 647                             " >= number of RQs (%u) in CIMC or UCSM",
 648                             pf->conf_cq_count, pf->conf_rq_count);
 649                 return -EINVAL;
 650         }
 651
 652         /* Check for non-existent VFs */
 653         pdev = RTE_ETH_DEV_TO_PCI(pf->rte_dev);
 654         if (vf->vf_id >= pdev->max_vfs) {
 655                 ENICPMD_LOG(ERR, "VF ID is invalid. vf_id %u max_vfs %u",
 656                             vf->vf_id, pdev->max_vfs);
 657                 return -ENODEV;
 658         }
 659
 660         eth_dev->device->driver = pf->rte_dev->device->driver;
 661         eth_dev->dev_ops = &enic_vf_representor_dev_ops;
 662         eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR |
 663                                         RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
 664         eth_dev->data->representor_id = vf->vf_id;
 665         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr_vf",
 666                 sizeof(struct rte_ether_addr) *
 667                 ENIC_UNICAST_PERFECT_FILTERS, 0);
 668         if (eth_dev->data->mac_addrs == NULL)
 669                 return -ENOMEM;
 670         /* Use 1 RX queue and 1 TX queue for representor path */
 671         eth_dev->data->nb_rx_queues = 1;
 672         eth_dev->data->nb_tx_queues = 1;
 673         eth_dev->rx_pkt_burst = &enic_vf_recv_pkts;
 674         eth_dev->tx_pkt_burst = &enic_vf_xmit_pkts;
 675         /* Initial link state copied from PF */
 676         eth_dev->data->dev_link = pf->rte_dev->data->dev_link;
 677         /* Representor vdev to perform devcmd */
 678         vf->enic.vdev = vnic_vf_rep_register(&vf->enic, pf->vdev, vf->vf_id);
 679         if (vf->enic.vdev == NULL)
 680                 return -ENOMEM;
 681         ret = vnic_dev_alloc_stats_mem(vf->enic.vdev);
 682         if (ret)
 683                 return ret;
 684         /* Get/copy VF vNIC MAC, MTU, etc. into eth_dev */
 685         ret = get_vf_config(vf);
 686         if (ret)
 687                 return ret;
 688
 689         /*
 690          * Calculate VF BDF. The firmware ensures that PF BDF is always
 691          * bus:dev.0, and VF BDFs are dev.1, dev.2, and so on.
 692          */
 693         vf->bdf = pdev->addr;
 694         vf->bdf.function += vf->vf_id + 1;
 695
 696         /* Copy a few fields used by enic_fm_flow */
 697         vf_enic = &vf->enic;
 698         vf_enic->switch_domain_id = vf->switch_domain_id;
 699         vf_enic->flow_filter_mode = pf->flow_filter_mode;
 700         vf_enic->rte_dev = eth_dev;
 701         vf_enic->dev_data = eth_dev->data;
 702         LIST_INIT(&vf_enic->flows);
 703         LIST_INIT(&vf_enic->memzone_list);
 704         rte_spinlock_init(&vf_enic->memzone_list_lock);
 705         addr = &vf->bdf;
 706         snprintf(vf_enic->bdf_name, ENICPMD_BDF_LENGTH, "%04x:%02x:%02x.%x",
 707                  addr->domain, addr->bus, addr->devid, addr->function);
 708         return 0;
 709 }
 710
 711 int enic_vf_representor_uninit(struct rte_eth_dev *eth_dev)
 712 {
 713         struct enic_vf_representor *vf;
 714
 715         ENICPMD_FUNC_TRACE();
 716         vf = eth_dev->data->dev_private;
 717         vnic_dev_unregister(vf->enic.vdev);
 718         return 0;
 719 }