drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <stdio.h>
  36
  37 #include <sys/stat.h>
  38 #include <sys/mman.h>
  39 #include <fcntl.h>
  40 #include <libgen.h>
  41
  42 #include <rte_pci.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_mbuf.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_ethdev.h>
  48
  49 #include "enic_compat.h"
  50 #include "enic.h"
  51 #include "wq_enet_desc.h"
  52 #include "rq_enet_desc.h"
  53 #include "cq_enet_desc.h"
  54 #include "vnic_enet.h"
  55 #include "vnic_dev.h"
  56 #include "vnic_wq.h"
  57 #include "vnic_rq.h"
  58 #include "vnic_cq.h"
  59 #include "vnic_intr.h"
  60 #include "vnic_nic.h"
  61
  62 static inline int enic_is_sriov_vf(struct enic *enic)
  63 {
  64         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  65 }
  66
  67 static int is_zero_addr(uint8_t *addr)
  68 {
  69         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  70 }
  71
  72 static int is_mcast_addr(uint8_t *addr)
  73 {
  74         return addr[0] & 1;
  75 }
  76
  77 static int is_eth_addr_valid(uint8_t *addr)
  78 {
  79         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  80 }
  81
  82 static inline struct rte_mbuf *
  83 enic_rxmbuf_alloc(struct rte_mempool *mp)
  84 {
  85         struct rte_mbuf *m;
  86
  87         m = __rte_mbuf_raw_alloc(mp);
  88         __rte_mbuf_sanity_check_raw(m, 0);
  89         return m;
  90 }
  91
  92 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
  93 {
  94         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
  95 }
  96
  97 static void enic_free_wq_buf(__rte_unused struct vnic_wq *wq, struct vnic_wq_buf *buf)
  98 {
  99         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->os_buf;
 100
 101         rte_mempool_put(mbuf->pool, mbuf);
 102         buf->os_buf = NULL;
 103 }
 104
 105 static void enic_wq_free_buf(struct vnic_wq *wq,
 106         __rte_unused struct cq_desc *cq_desc,
 107         struct vnic_wq_buf *buf,
 108         __rte_unused void *opaque)
 109 {
 110         enic_free_wq_buf(wq, buf);
 111 }
 112
 113 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 114         __rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 115 {
 116         struct enic *enic = vnic_dev_priv(vdev);
 117
 118         vnic_wq_service(&enic->wq[q_number], cq_desc,
 119                 completed_index, enic_wq_free_buf,
 120                 opaque);
 121
 122         return 0;
 123 }
 124
 125 static void enic_log_q_error(struct enic *enic)
 126 {
 127         unsigned int i;
 128         u32 error_status;
 129
 130         for (i = 0; i < enic->wq_count; i++) {
 131                 error_status = vnic_wq_error_status(&enic->wq[i]);
 132                 if (error_status)
 133                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 134                                 error_status);
 135         }
 136
 137         for (i = 0; i < enic->rq_count; i++) {
 138                 error_status = vnic_rq_error_status(&enic->rq[i]);
 139                 if (error_status)
 140                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 141                                 error_status);
 142         }
 143 }
 144
 145 unsigned int enic_cleanup_wq(struct enic *enic, struct vnic_wq *wq)
 146 {
 147         unsigned int cq = enic_cq_wq(enic, wq->index);
 148
 149         /* Return the work done */
 150         return vnic_cq_service(&enic->cq[cq],
 151                 -1 /*wq_work_to_do*/, enic_wq_service, NULL);
 152 }
 153
 154
 155 int enic_send_pkt(struct enic *enic, struct vnic_wq *wq,
 156         struct rte_mbuf *tx_pkt, unsigned short len,
 157         uint8_t sop, uint8_t eop,
 158         uint16_t ol_flags, uint16_t vlan_tag)
 159 {
 160         struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
 161         uint16_t mss = 0;
 162         uint8_t cq_entry = eop;
 163         uint8_t vlan_tag_insert = 0;
 164         uint64_t bus_addr = (dma_addr_t)
 165             (tx_pkt->buf_physaddr + RTE_PKTMBUF_HEADROOM);
 166
 167         if (sop) {
 168                 if (ol_flags & PKT_TX_VLAN_PKT)
 169                         vlan_tag_insert = 1;
 170
 171                 if (enic->hw_ip_checksum) {
 172                         if (ol_flags & PKT_TX_IP_CKSUM)
 173                                 mss |= ENIC_CALC_IP_CKSUM;
 174
 175                         if (ol_flags & PKT_TX_TCP_UDP_CKSUM)
 176                                 mss |= ENIC_CALC_TCP_UDP_CKSUM;
 177                 }
 178         }
 179
 180         wq_enet_desc_enc(desc,
 181                 bus_addr,
 182                 len,
 183                 mss,
 184                 0 /* header_length */,
 185                 0 /* offload_mode WQ_ENET_OFFLOAD_MODE_CSUM */,
 186                 eop,
 187                 cq_entry,
 188                 0 /* fcoe_encap */,
 189                 vlan_tag_insert,
 190                 vlan_tag,
 191                 0 /* loopback */);
 192
 193         vnic_wq_post(wq, (void *)tx_pkt, bus_addr, len,
 194                 sop, eop,
 195                 1 /*desc_skip_cnt*/,
 196                 cq_entry,
 197                 0 /*compressed send*/,
 198                 0 /*wrid*/);
 199
 200         return 0;
 201 }
 202
 203 void enic_dev_stats_clear(struct enic *enic)
 204 {
 205         if (vnic_dev_stats_clear(enic->vdev))
 206                 dev_err(enic, "Error in clearing stats\n");
 207 }
 208
 209 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 210 {
 211         struct vnic_stats *stats;
 212
 213         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 214                 dev_err(enic, "Error in getting stats\n");
 215                 return;
 216         }
 217
 218         r_stats->ipackets = stats->rx.rx_frames_ok;
 219         r_stats->opackets = stats->tx.tx_frames_ok;
 220
 221         r_stats->ibytes = stats->rx.rx_bytes_ok;
 222         r_stats->obytes = stats->tx.tx_bytes_ok;
 223
 224         r_stats->ierrors = stats->rx.rx_errors;
 225         r_stats->oerrors = stats->tx.tx_errors;
 226
 227         r_stats->imcasts = stats->rx.rx_multicast_frames_ok;
 228         r_stats->rx_nombuf = stats->rx.rx_no_bufs;
 229 }
 230
 231 void enic_del_mac_address(struct enic *enic)
 232 {
 233         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 234                 dev_err(enic, "del mac addr failed\n");
 235 }
 236
 237 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 238 {
 239         int err;
 240
 241         if (!is_eth_addr_valid(mac_addr)) {
 242                 dev_err(enic, "invalid mac address\n");
 243                 return;
 244         }
 245
 246         err = vnic_dev_del_addr(enic->vdev, mac_addr);
 247         if (err) {
 248                 dev_err(enic, "del mac addr failed\n");
 249                 return;
 250         }
 251
 252         ether_addr_copy((struct ether_addr *)mac_addr,
 253                 (struct ether_addr *)enic->mac_addr);
 254
 255         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 256         if (err) {
 257                 dev_err(enic, "add mac addr failed\n");
 258                 return;
 259         }
 260 }
 261
 262 static void
 263 enic_free_rq_buf(__rte_unused struct vnic_rq *rq, struct vnic_rq_buf *buf)
 264 {
 265         if (!buf->os_buf)
 266                 return;
 267
 268         rte_pktmbuf_free((struct rte_mbuf *)buf->os_buf);
 269         buf->os_buf = NULL;
 270 }
 271
 272 void enic_init_vnic_resources(struct enic *enic)
 273 {
 274         unsigned int error_interrupt_enable = 1;
 275         unsigned int error_interrupt_offset = 0;
 276         unsigned int index = 0;
 277
 278         for (index = 0; index < enic->rq_count; index++) {
 279                 vnic_rq_init(&enic->rq[index],
 280                         enic_cq_rq(enic, index),
 281                         error_interrupt_enable,
 282                         error_interrupt_offset);
 283         }
 284
 285         for (index = 0; index < enic->wq_count; index++) {
 286                 vnic_wq_init(&enic->wq[index],
 287                         enic_cq_wq(enic, index),
 288                         error_interrupt_enable,
 289                         error_interrupt_offset);
 290         }
 291
 292         vnic_dev_stats_clear(enic->vdev);
 293
 294         for (index = 0; index < enic->cq_count; index++) {
 295                 vnic_cq_init(&enic->cq[index],
 296                         0 /* flow_control_enable */,
 297                         1 /* color_enable */,
 298                         0 /* cq_head */,
 299                         0 /* cq_tail */,
 300                         1 /* cq_tail_color */,
 301                         0 /* interrupt_enable */,
 302                         1 /* cq_entry_enable */,
 303                         0 /* cq_message_enable */,
 304                         0 /* interrupt offset */,
 305                         0 /* cq_message_addr */);
 306         }
 307
 308         vnic_intr_init(&enic->intr,
 309                 enic->config.intr_timer_usec,
 310                 enic->config.intr_timer_type,
 311                 /*mask_on_assertion*/1);
 312 }
 313
 314
 315 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 316 {
 317         struct enic *enic = vnic_dev_priv(rq->vdev);
 318         dma_addr_t dma_addr;
 319         struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
 320         uint8_t type = RQ_ENET_TYPE_ONLY_SOP;
 321         u16 split_hdr_size = vnic_get_hdr_split_size(enic->vdev);
 322         struct rte_mbuf *mbuf = enic_rxmbuf_alloc(rq->mp);
 323         struct rte_mbuf *hdr_mbuf = NULL;
 324
 325         if (!mbuf) {
 326                 dev_err(enic, "mbuf alloc in enic_rq_alloc_buf failed\n");
 327                 return -1;
 328         }
 329
 330         if (unlikely(split_hdr_size)) {
 331                 if (vnic_rq_desc_avail(rq) < 2) {
 332                         rte_mempool_put(mbuf->pool, mbuf);
 333                         return -1;
 334                 }
 335                 hdr_mbuf = enic_rxmbuf_alloc(rq->mp);
 336                 if (!hdr_mbuf) {
 337                         rte_mempool_put(mbuf->pool, mbuf);
 338                         dev_err(enic,
 339                                 "hdr_mbuf alloc in enic_rq_alloc_buf failed\n");
 340                         return -1;
 341                 }
 342
 343                 hdr_mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 344
 345                 hdr_mbuf->nb_segs = 2;
 346                 hdr_mbuf->port = enic->port_id;
 347                 hdr_mbuf->next = mbuf;
 348
 349                 dma_addr = (dma_addr_t)
 350                     (hdr_mbuf->buf_physaddr + hdr_mbuf->data_off);
 351
 352                 rq_enet_desc_enc(desc, dma_addr, type, split_hdr_size);
 353
 354                 vnic_rq_post(rq, (void *)hdr_mbuf, 0 /*os_buf_index*/, dma_addr,
 355                         (unsigned int)split_hdr_size, 0 /*wrid*/);
 356
 357                 desc = vnic_rq_next_desc(rq);
 358                 type = RQ_ENET_TYPE_NOT_SOP;
 359         } else {
 360                 mbuf->nb_segs = 1;
 361                 mbuf->port = enic->port_id;
 362         }
 363
 364         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 365         mbuf->next = NULL;
 366
 367         dma_addr = (dma_addr_t)
 368             (mbuf->buf_physaddr + mbuf->data_off);
 369
 370         rq_enet_desc_enc(desc, dma_addr, type, mbuf->buf_len);
 371
 372         vnic_rq_post(rq, (void *)mbuf, 0 /*os_buf_index*/, dma_addr,
 373                 (unsigned int)mbuf->buf_len, 0 /*wrid*/);
 374
 375         return 0;
 376 }
 377
 378 static int enic_rq_indicate_buf(struct vnic_rq *rq,
 379         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 380         int skipped, void *opaque)
 381 {
 382         struct enic *enic = vnic_dev_priv(rq->vdev);
 383         struct rte_mbuf **rx_pkt_bucket = (struct rte_mbuf **)opaque;
 384         struct rte_mbuf *rx_pkt = NULL;
 385         struct rte_mbuf *hdr_rx_pkt = NULL;
 386
 387         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 388         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 389         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 390         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 391         u8 packet_error;
 392         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
 393         u32 rss_hash;
 394
 395         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 396                 &type, &color, &q_number, &completed_index,
 397                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 398                 &csum_not_calc, &rss_hash, &bytes_written,
 399                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
 400                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 401                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 402                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 403                 &fcs_ok);
 404
 405         rx_pkt = (struct rte_mbuf *)buf->os_buf;
 406         buf->os_buf = NULL;
 407
 408         if (unlikely(packet_error)) {
 409                 dev_err(enic, "packet error\n");
 410                 rx_pkt->data_len = 0;
 411                 return 0;
 412         }
 413
 414         if (unlikely(skipped)) {
 415                 rx_pkt->data_len = 0;
 416                 return 0;
 417         }
 418
 419         if (likely(!vnic_get_hdr_split_size(enic->vdev))) {
 420                 /* No header split configured */
 421                 *rx_pkt_bucket = rx_pkt;
 422                 rx_pkt->pkt_len = bytes_written;
 423
 424                 if (ipv4) {
 425                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV4;
 426                         if (!csum_not_calc) {
 427                                 if (unlikely(!ipv4_csum_ok))
 428                                         rx_pkt->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 429
 430                                 if ((tcp || udp) && (!tcp_udp_csum_ok))
 431                                         rx_pkt->ol_flags |= PKT_RX_L4_CKSUM_BAD;
 432                         }
 433                 } else if (ipv6)
 434                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV6;
 435         } else {
 436                 /* Header split */
 437                 if (sop && !eop) {
 438                         /* This piece is header */
 439                         *rx_pkt_bucket = rx_pkt;
 440                         rx_pkt->pkt_len = bytes_written;
 441                 } else {
 442                         if (sop && eop) {
 443                                 /* The packet is smaller than split_hdr_size */
 444                                 *rx_pkt_bucket = rx_pkt;
 445                                 rx_pkt->pkt_len = bytes_written;
 446                                 if (ipv4) {
 447                                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV4;
 448                                         if (!csum_not_calc) {
 449                                                 if (unlikely(!ipv4_csum_ok))
 450                                                         rx_pkt->ol_flags |=
 451                                                             PKT_RX_IP_CKSUM_BAD;
 452
 453                                                 if ((tcp || udp) &&
 454                                                     (!tcp_udp_csum_ok))
 455                                                         rx_pkt->ol_flags |=
 456                                                             PKT_RX_L4_CKSUM_BAD;
 457                                         }
 458                                 } else if (ipv6)
 459                                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV6;
 460                         } else {
 461                                 /* Payload */
 462                                 hdr_rx_pkt = *rx_pkt_bucket;
 463                                 hdr_rx_pkt->pkt_len += bytes_written;
 464                                 if (ipv4) {
 465                                         hdr_rx_pkt->packet_type =
 466                                                 RTE_PTYPE_L3_IPV4;
 467                                         if (!csum_not_calc) {
 468                                                 if (unlikely(!ipv4_csum_ok))
 469                                                         hdr_rx_pkt->ol_flags |=
 470                                                             PKT_RX_IP_CKSUM_BAD;
 471
 472                                                 if ((tcp || udp) &&
 473                                                     (!tcp_udp_csum_ok))
 474                                                         hdr_rx_pkt->ol_flags |=
 475                                                             PKT_RX_L4_CKSUM_BAD;
 476                                         }
 477                                 } else if (ipv6)
 478                                         hdr_rx_pkt->packet_type =
 479                                                 RTE_PTYPE_L3_IPV6;
 480                         }
 481                 }
 482         }
 483
 484         rx_pkt->data_len = bytes_written;
 485
 486         if (rss_hash) {
 487                 rx_pkt->ol_flags |= PKT_RX_RSS_HASH;
 488                 rx_pkt->hash.rss = rss_hash;
 489         }
 490
 491         if (vlan_tci) {
 492                 rx_pkt->ol_flags |= PKT_RX_VLAN_PKT;
 493                 rx_pkt->vlan_tci = vlan_tci;
 494         }
 495
 496         return eop;
 497 }
 498
 499 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 500         __rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 501 {
 502         struct enic *enic = vnic_dev_priv(vdev);
 503
 504         return vnic_rq_service(&enic->rq[q_number], cq_desc,
 505                 completed_index, VNIC_RQ_RETURN_DESC,
 506                 enic_rq_indicate_buf, opaque);
 507
 508 }
 509
 510 int enic_poll(struct vnic_rq *rq, struct rte_mbuf **rx_pkts,
 511         unsigned int budget, unsigned int *work_done)
 512 {
 513         struct enic *enic = vnic_dev_priv(rq->vdev);
 514         unsigned int cq = enic_cq_rq(enic, rq->index);
 515         int err = 0;
 516
 517         *work_done = vnic_cq_service(&enic->cq[cq],
 518                 budget, enic_rq_service, (void *)rx_pkts);
 519
 520         if (*work_done) {
 521                 vnic_rq_fill(rq, enic_rq_alloc_buf);
 522
 523                 /* Need at least one buffer on ring to get going */
 524                 if (vnic_rq_desc_used(rq) == 0) {
 525                         dev_err(enic, "Unable to alloc receive buffers\n");
 526                         err = -1;
 527                 }
 528         }
 529         return err;
 530 }
 531
 532 static void *
 533 enic_alloc_consistent(__rte_unused void *priv, size_t size,
 534         dma_addr_t *dma_handle, u8 *name)
 535 {
 536         void *vaddr;
 537         const struct rte_memzone *rz;
 538         *dma_handle = 0;
 539
 540         rz = rte_memzone_reserve_aligned((const char *)name,
 541                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 542         if (!rz) {
 543                 pr_err("%s : Failed to allocate memory requested for %s",
 544                         __func__, name);
 545                 return NULL;
 546         }
 547
 548         vaddr = rz->addr;
 549         *dma_handle = (dma_addr_t)rz->phys_addr;
 550
 551         return vaddr;
 552 }
 553
 554 static void
 555 enic_free_consistent(__rte_unused struct rte_pci_device *hwdev,
 556         __rte_unused size_t size,
 557         __rte_unused void *vaddr,
 558         __rte_unused dma_addr_t dma_handle)
 559 {
 560         /* Nothing to be done */
 561 }
 562
 563 static void
 564 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 565         void *arg)
 566 {
 567         struct enic *enic = pmd_priv((struct rte_eth_dev *)arg);
 568
 569         vnic_intr_return_all_credits(&enic->intr);
 570
 571         enic_log_q_error(enic);
 572 }
 573
 574 int enic_enable(struct enic *enic)
 575 {
 576         unsigned int index;
 577         struct rte_eth_dev *eth_dev = enic->rte_dev;
 578
 579         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 580         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 581         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
 582
 583         if (enic_clsf_init(enic))
 584                 dev_warning(enic, "Init of hash table for clsf failed."\
 585                         "Flow director feature will not work\n");
 586
 587         /* Fill RQ bufs */
 588         for (index = 0; index < enic->rq_count; index++) {
 589                 vnic_rq_fill(&enic->rq[index], enic_rq_alloc_buf);
 590
 591                 /* Need at least one buffer on ring to get going
 592                 */
 593                 if (vnic_rq_desc_used(&enic->rq[index]) == 0) {
 594                         dev_err(enic, "Unable to alloc receive buffers\n");
 595                         return -1;
 596                 }
 597         }
 598
 599         for (index = 0; index < enic->wq_count; index++)
 600                 vnic_wq_enable(&enic->wq[index]);
 601         for (index = 0; index < enic->rq_count; index++)
 602                 vnic_rq_enable(&enic->rq[index]);
 603
 604         vnic_dev_enable_wait(enic->vdev);
 605
 606         /* Register and enable error interrupt */
 607         rte_intr_callback_register(&(enic->pdev->intr_handle),
 608                 enic_intr_handler, (void *)enic->rte_dev);
 609
 610         rte_intr_enable(&(enic->pdev->intr_handle));
 611         vnic_intr_unmask(&enic->intr);
 612
 613         return 0;
 614 }
 615
 616 int enic_alloc_intr_resources(struct enic *enic)
 617 {
 618         int err;
 619
 620         dev_info(enic, "vNIC resources used:  "\
 621                 "wq %d rq %d cq %d intr %d\n",
 622                 enic->wq_count, enic->rq_count,
 623                 enic->cq_count, enic->intr_count);
 624
 625         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 626         if (err)
 627                 enic_free_vnic_resources(enic);
 628
 629         return err;
 630 }
 631
 632 void enic_free_rq(void *rxq)
 633 {
 634         struct vnic_rq *rq = (struct vnic_rq *)rxq;
 635         struct enic *enic = vnic_dev_priv(rq->vdev);
 636
 637         vnic_rq_free(rq);
 638         vnic_cq_free(&enic->cq[rq->index]);
 639 }
 640
 641 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 642 {
 643         vnic_wq_enable(&enic->wq[queue_idx]);
 644 }
 645
 646 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 647 {
 648         return vnic_wq_disable(&enic->wq[queue_idx]);
 649 }
 650
 651 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 652 {
 653         vnic_rq_enable(&enic->rq[queue_idx]);
 654 }
 655
 656 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 657 {
 658         return vnic_rq_disable(&enic->rq[queue_idx]);
 659 }
 660
 661 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 662         unsigned int socket_id, struct rte_mempool *mp,
 663         uint16_t nb_desc)
 664 {
 665         int err;
 666         struct vnic_rq *rq = &enic->rq[queue_idx];
 667
 668         rq->socket_id = socket_id;
 669         rq->mp = mp;
 670
 671         if (nb_desc) {
 672                 if (nb_desc > enic->config.rq_desc_count) {
 673                         dev_warning(enic,
 674                                 "RQ %d - number of rx desc in cmd line (%d)"\
 675                                 "is greater than that in the UCSM/CIMC adapter"\
 676                                 "policy.  Applying the value in the adapter "\
 677                                 "policy (%d).\n",
 678                                 queue_idx, nb_desc, enic->config.rq_desc_count);
 679                 } else if (nb_desc != enic->config.rq_desc_count) {
 680                         enic->config.rq_desc_count = nb_desc;
 681                         dev_info(enic,
 682                                 "RX Queues - effective number of descs:%d\n",
 683                                 nb_desc);
 684                 }
 685         }
 686
 687         /* Allocate queue resources */
 688         err = vnic_rq_alloc(enic->vdev, &enic->rq[queue_idx], queue_idx,
 689                 enic->config.rq_desc_count,
 690                 sizeof(struct rq_enet_desc));
 691         if (err) {
 692                 dev_err(enic, "error in allocation of rq\n");
 693                 return err;
 694         }
 695
 696         err = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 697                 socket_id, enic->config.rq_desc_count,
 698                 sizeof(struct cq_enet_rq_desc));
 699         if (err) {
 700                 vnic_rq_free(rq);
 701                 dev_err(enic, "error in allocation of cq for rq\n");
 702         }
 703
 704         return err;
 705 }
 706
 707 void enic_free_wq(void *txq)
 708 {
 709         struct vnic_wq *wq = (struct vnic_wq *)txq;
 710         struct enic *enic = vnic_dev_priv(wq->vdev);
 711
 712         vnic_wq_free(wq);
 713         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 714 }
 715
 716 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 717         unsigned int socket_id, uint16_t nb_desc)
 718 {
 719         int err;
 720         struct vnic_wq *wq = &enic->wq[queue_idx];
 721         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 722
 723         wq->socket_id = socket_id;
 724         if (nb_desc) {
 725                 if (nb_desc > enic->config.wq_desc_count) {
 726                         dev_warning(enic,
 727                                 "WQ %d - number of tx desc in cmd line (%d)"\
 728                                 "is greater than that in the UCSM/CIMC adapter"\
 729                                 "policy.  Applying the value in the adapter "\
 730                                 "policy (%d)\n",
 731                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 732                 } else if (nb_desc != enic->config.wq_desc_count) {
 733                         enic->config.wq_desc_count = nb_desc;
 734                         dev_info(enic,
 735                                 "TX Queues - effective number of descs:%d\n",
 736                                 nb_desc);
 737                 }
 738         }
 739
 740         /* Allocate queue resources */
 741         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 742                 enic->config.wq_desc_count,
 743                 sizeof(struct wq_enet_desc));
 744         if (err) {
 745                 dev_err(enic, "error in allocation of wq\n");
 746                 return err;
 747         }
 748
 749         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 750                 socket_id, enic->config.wq_desc_count,
 751                 sizeof(struct cq_enet_wq_desc));
 752         if (err) {
 753                 vnic_wq_free(wq);
 754                 dev_err(enic, "error in allocation of cq for wq\n");
 755         }
 756
 757         return err;
 758 }
 759
 760 int enic_disable(struct enic *enic)
 761 {
 762         unsigned int i;
 763         int err;
 764
 765         vnic_intr_mask(&enic->intr);
 766         (void)vnic_intr_masked(&enic->intr); /* flush write */
 767
 768         vnic_dev_disable(enic->vdev);
 769
 770         enic_clsf_destroy(enic);
 771
 772         if (!enic_is_sriov_vf(enic))
 773                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 774
 775         for (i = 0; i < enic->wq_count; i++) {
 776                 err = vnic_wq_disable(&enic->wq[i]);
 777                 if (err)
 778                         return err;
 779         }
 780         for (i = 0; i < enic->rq_count; i++) {
 781                 err = vnic_rq_disable(&enic->rq[i]);
 782                 if (err)
 783                         return err;
 784         }
 785
 786         vnic_dev_set_reset_flag(enic->vdev, 1);
 787         vnic_dev_notify_unset(enic->vdev);
 788
 789         for (i = 0; i < enic->wq_count; i++)
 790                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 791         for (i = 0; i < enic->rq_count; i++)
 792                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 793         for (i = 0; i < enic->cq_count; i++)
 794                 vnic_cq_clean(&enic->cq[i]);
 795         vnic_intr_clean(&enic->intr);
 796
 797         return 0;
 798 }
 799
 800 static int enic_dev_wait(struct vnic_dev *vdev,
 801         int (*start)(struct vnic_dev *, int),
 802         int (*finished)(struct vnic_dev *, int *),
 803         int arg)
 804 {
 805         int done;
 806         int err;
 807         int i;
 808
 809         err = start(vdev, arg);
 810         if (err)
 811                 return err;
 812
 813         /* Wait for func to complete...2 seconds max */
 814         for (i = 0; i < 2000; i++) {
 815                 err = finished(vdev, &done);
 816                 if (err)
 817                         return err;
 818                 if (done)
 819                         return 0;
 820                 usleep(1000);
 821         }
 822         return -ETIMEDOUT;
 823 }
 824
 825 static int enic_dev_open(struct enic *enic)
 826 {
 827         int err;
 828
 829         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 830                 vnic_dev_open_done, 0);
 831         if (err)
 832                 dev_err(enic_get_dev(enic),
 833                         "vNIC device open failed, err %d\n", err);
 834
 835         return err;
 836 }
 837
 838 static int enic_set_rsskey(struct enic *enic)
 839 {
 840         dma_addr_t rss_key_buf_pa;
 841         union vnic_rss_key *rss_key_buf_va = NULL;
 842         static union vnic_rss_key rss_key = {
 843                 .key = {
 844                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 845                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 846                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 847                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 848                 }
 849         };
 850         int err;
 851         u8 name[NAME_MAX];
 852
 853         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 854         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 855                 &rss_key_buf_pa, name);
 856         if (!rss_key_buf_va)
 857                 return -ENOMEM;
 858
 859         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 860
 861         err = enic_set_rss_key(enic,
 862                 rss_key_buf_pa,
 863                 sizeof(union vnic_rss_key));
 864
 865         enic_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
 866                 rss_key_buf_va, rss_key_buf_pa);
 867
 868         return err;
 869 }
 870
 871 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 872 {
 873         dma_addr_t rss_cpu_buf_pa;
 874         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 875         int i;
 876         int err;
 877         u8 name[NAME_MAX];
 878
 879         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 880         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 881                 &rss_cpu_buf_pa, name);
 882         if (!rss_cpu_buf_va)
 883                 return -ENOMEM;
 884
 885         for (i = 0; i < (1 << rss_hash_bits); i++)
 886                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
 887
 888         err = enic_set_rss_cpu(enic,
 889                 rss_cpu_buf_pa,
 890                 sizeof(union vnic_rss_cpu));
 891
 892         enic_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
 893                 rss_cpu_buf_va, rss_cpu_buf_pa);
 894
 895         return err;
 896 }
 897
 898 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 899         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 900 {
 901         const u8 tso_ipid_split_en = 0;
 902         int err;
 903
 904         /* Enable VLAN tag stripping */
 905
 906         err = enic_set_nic_cfg(enic,
 907                 rss_default_cpu, rss_hash_type,
 908                 rss_hash_bits, rss_base_cpu,
 909                 rss_enable, tso_ipid_split_en,
 910                 enic->ig_vlan_strip_en);
 911
 912         return err;
 913 }
 914
 915 int enic_set_rss_nic_cfg(struct enic *enic)
 916 {
 917         const u8 rss_default_cpu = 0;
 918         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 919             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 920             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 921             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 922         const u8 rss_hash_bits = 7;
 923         const u8 rss_base_cpu = 0;
 924         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 925
 926         if (rss_enable) {
 927                 if (!enic_set_rsskey(enic)) {
 928                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 929                                 rss_enable = 0;
 930                                 dev_warning(enic, "RSS disabled, "\
 931                                         "Failed to set RSS cpu indirection table.");
 932                         }
 933                 } else {
 934                         rss_enable = 0;
 935                         dev_warning(enic,
 936                                 "RSS disabled, Failed to set RSS key.\n");
 937                 }
 938         }
 939
 940         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 941                 rss_hash_bits, rss_base_cpu, rss_enable);
 942 }
 943
 944 int enic_setup_finish(struct enic *enic)
 945 {
 946         int ret;
 947
 948         ret = enic_set_rss_nic_cfg(enic);
 949         if (ret) {
 950                 dev_err(enic, "Failed to config nic, aborting.\n");
 951                 return -1;
 952         }
 953
 954         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 955
 956         /* Default conf */
 957         vnic_dev_packet_filter(enic->vdev,
 958                 1 /* directed  */,
 959                 1 /* multicast */,
 960                 1 /* broadcast */,
 961                 0 /* promisc   */,
 962                 1 /* allmulti  */);
 963
 964         enic->promisc = 0;
 965         enic->allmulti = 1;
 966
 967         return 0;
 968 }
 969
 970 void enic_add_packet_filter(struct enic *enic)
 971 {
 972         /* Args -> directed, multicast, broadcast, promisc, allmulti */
 973         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
 974                 enic->promisc, enic->allmulti);
 975 }
 976
 977 int enic_get_link_status(struct enic *enic)
 978 {
 979         return vnic_dev_link_status(enic->vdev);
 980 }
 981
 982 static void enic_dev_deinit(struct enic *enic)
 983 {
 984         struct rte_eth_dev *eth_dev = enic->rte_dev;
 985
 986         rte_free(eth_dev->data->mac_addrs);
 987 }
 988
 989
 990 int enic_set_vnic_res(struct enic *enic)
 991 {
 992         struct rte_eth_dev *eth_dev = enic->rte_dev;
 993
 994         if ((enic->rq_count < eth_dev->data->nb_rx_queues) ||
 995                 (enic->wq_count < eth_dev->data->nb_tx_queues)) {
 996                 dev_err(dev, "Not enough resources configured, aborting\n");
 997                 return -1;
 998         }
 999
1000         enic->rq_count = eth_dev->data->nb_rx_queues;
1001         enic->wq_count = eth_dev->data->nb_tx_queues;
1002         if (enic->cq_count < (enic->rq_count + enic->wq_count)) {
1003                 dev_err(dev, "Not enough resources configured, aborting\n");
1004                 return -1;
1005         }
1006
1007         enic->cq_count = enic->rq_count + enic->wq_count;
1008         return 0;
1009 }
1010
1011 static int enic_dev_init(struct enic *enic)
1012 {
1013         int err;
1014         struct rte_eth_dev *eth_dev = enic->rte_dev;
1015
1016         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1017
1018         /* Get vNIC configuration
1019         */
1020         err = enic_get_vnic_config(enic);
1021         if (err) {
1022                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1023                 return err;
1024         }
1025
1026         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1027         if (!eth_dev->data->mac_addrs) {
1028                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1029                 return -1;
1030         }
1031         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1032                 &eth_dev->data->mac_addrs[0]);
1033
1034
1035         /* Get available resource counts
1036         */
1037         enic_get_res_counts(enic);
1038
1039         vnic_dev_set_reset_flag(enic->vdev, 0);
1040
1041         return 0;
1042
1043 }
1044
1045 int enic_probe(struct enic *enic)
1046 {
1047         struct rte_pci_device *pdev = enic->pdev;
1048         int err = -1;
1049
1050         dev_debug(enic, " Initializing ENIC PMD version %s\n", DRV_VERSION);
1051
1052         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1053         enic->bar0.len = pdev->mem_resource[0].len;
1054
1055         /* Register vNIC device */
1056         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1057         if (!enic->vdev) {
1058                 dev_err(enic, "vNIC registration failed, aborting\n");
1059                 goto err_out;
1060         }
1061
1062         vnic_register_cbacks(enic->vdev,
1063                 enic_alloc_consistent,
1064                 enic_free_consistent);
1065
1066         /* Issue device open to get device in known state */
1067         err = enic_dev_open(enic);
1068         if (err) {
1069                 dev_err(enic, "vNIC dev open failed, aborting\n");
1070                 goto err_out_unregister;
1071         }
1072
1073         /* Set ingress vlan rewrite mode before vnic initialization */
1074         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1075                 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
1076         if (err) {
1077                 dev_err(enic,
1078                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1079                 goto err_out_dev_close;
1080         }
1081
1082         /* Issue device init to initialize the vnic-to-switch link.
1083          * We'll start with carrier off and wait for link UP
1084          * notification later to turn on carrier.  We don't need
1085          * to wait here for the vnic-to-switch link initialization
1086          * to complete; link UP notification is the indication that
1087          * the process is complete.
1088          */
1089
1090         err = vnic_dev_init(enic->vdev, 0);
1091         if (err) {
1092                 dev_err(enic, "vNIC dev init failed, aborting\n");
1093                 goto err_out_dev_close;
1094         }
1095
1096         err = enic_dev_init(enic);
1097         if (err) {
1098                 dev_err(enic, "Device initialization failed, aborting\n");
1099                 goto err_out_dev_close;
1100         }
1101
1102         return 0;
1103
1104 err_out_dev_close:
1105         vnic_dev_close(enic->vdev);
1106 err_out_unregister:
1107         vnic_dev_unregister(enic->vdev);
1108 err_out:
1109         return err;
1110 }
1111
1112 void enic_remove(struct enic *enic)
1113 {
1114         enic_dev_deinit(enic);
1115         vnic_dev_close(enic->vdev);
1116         vnic_dev_unregister(enic->vdev);
1117 }