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 #ident "$Id$"
  35
  36 #include <stdio.h>
  37
  38 #include <sys/stat.h>
  39 #include <sys/mman.h>
  40 #include <fcntl.h>
  41 #include <libgen.h>
  42
  43 #include <rte_pci.h>
  44 #include <rte_memzone.h>
  45 #include <rte_malloc.h>
  46 #include <rte_mbuf.h>
  47 #include <rte_string_fns.h>
  48 #include <rte_ethdev.h>
  49
  50 #include "enic_compat.h"
  51 #include "enic.h"
  52 #include "wq_enet_desc.h"
  53 #include "rq_enet_desc.h"
  54 #include "cq_enet_desc.h"
  55 #include "vnic_enet.h"
  56 #include "vnic_dev.h"
  57 #include "vnic_wq.h"
  58 #include "vnic_rq.h"
  59 #include "vnic_cq.h"
  60 #include "vnic_intr.h"
  61 #include "vnic_nic.h"
  62
  63 static inline int enic_is_sriov_vf(struct enic *enic)
  64 {
  65         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  66 }
  67
  68 static int is_zero_addr(uint8_t *addr)
  69 {
  70         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  71 }
  72
  73 static int is_mcast_addr(uint8_t *addr)
  74 {
  75         return addr[0] & 1;
  76 }
  77
  78 static int is_eth_addr_valid(uint8_t *addr)
  79 {
  80         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  81 }
  82
  83 static inline struct rte_mbuf *
  84 enic_rxmbuf_alloc(struct rte_mempool *mp)
  85 {
  86         struct rte_mbuf *m;
  87
  88         m = __rte_mbuf_raw_alloc(mp);
  89         __rte_mbuf_sanity_check_raw(m, 0);
  90         return m;
  91 }
  92
  93 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
  94 {
  95         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
  96 }
  97
  98 static void enic_free_wq_buf(__rte_unused struct vnic_wq *wq, struct vnic_wq_buf *buf)
  99 {
 100         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->os_buf;
 101
 102         rte_mempool_put(mbuf->pool, mbuf);
 103         buf->os_buf = NULL;
 104 }
 105
 106 static void enic_wq_free_buf(struct vnic_wq *wq,
 107         __rte_unused struct cq_desc *cq_desc,
 108         struct vnic_wq_buf *buf,
 109         __rte_unused void *opaque)
 110 {
 111         enic_free_wq_buf(wq, buf);
 112 }
 113
 114 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 115         __rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 116 {
 117         struct enic *enic = vnic_dev_priv(vdev);
 118
 119         vnic_wq_service(&enic->wq[q_number], cq_desc,
 120                 completed_index, enic_wq_free_buf,
 121                 opaque);
 122
 123         return 0;
 124 }
 125
 126 static void enic_log_q_error(struct enic *enic)
 127 {
 128         unsigned int i;
 129         u32 error_status;
 130
 131         for (i = 0; i < enic->wq_count; i++) {
 132                 error_status = vnic_wq_error_status(&enic->wq[i]);
 133                 if (error_status)
 134                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 135                                 error_status);
 136         }
 137
 138         for (i = 0; i < enic->rq_count; i++) {
 139                 error_status = vnic_rq_error_status(&enic->rq[i]);
 140                 if (error_status)
 141                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 142                                 error_status);
 143         }
 144 }
 145
 146 unsigned int enic_cleanup_wq(struct enic *enic, struct vnic_wq *wq)
 147 {
 148         unsigned int cq = enic_cq_wq(enic, wq->index);
 149
 150         /* Return the work done */
 151         return vnic_cq_service(&enic->cq[cq],
 152                 -1 /*wq_work_to_do*/, enic_wq_service, NULL);
 153 }
 154
 155
 156 int enic_send_pkt(struct enic *enic, struct vnic_wq *wq,
 157         struct rte_mbuf *tx_pkt, unsigned short len,
 158         uint8_t sop, uint8_t eop,
 159         uint16_t ol_flags, uint16_t vlan_tag)
 160 {
 161         struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
 162         uint16_t mss = 0;
 163         uint8_t cq_entry = eop;
 164         uint8_t vlan_tag_insert = 0;
 165         uint64_t bus_addr = (dma_addr_t)
 166             (tx_pkt->buf_physaddr + RTE_PKTMBUF_HEADROOM);
 167
 168         if (sop) {
 169                 if (ol_flags & PKT_TX_VLAN_PKT)
 170                         vlan_tag_insert = 1;
 171
 172                 if (enic->hw_ip_checksum) {
 173                         if (ol_flags & PKT_TX_IP_CKSUM)
 174                                 mss |= ENIC_CALC_IP_CKSUM;
 175
 176                         if (ol_flags & PKT_TX_TCP_UDP_CKSUM)
 177                                 mss |= ENIC_CALC_TCP_UDP_CKSUM;
 178                 }
 179         }
 180
 181         wq_enet_desc_enc(desc,
 182                 bus_addr,
 183                 len,
 184                 mss,
 185                 0 /* header_length */,
 186                 0 /* offload_mode WQ_ENET_OFFLOAD_MODE_CSUM */,
 187                 eop,
 188                 cq_entry,
 189                 0 /* fcoe_encap */,
 190                 vlan_tag_insert,
 191                 vlan_tag,
 192                 0 /* loopback */);
 193
 194         vnic_wq_post(wq, (void *)tx_pkt, bus_addr, len,
 195                 sop, eop,
 196                 1 /*desc_skip_cnt*/,
 197                 cq_entry,
 198                 0 /*compressed send*/,
 199                 0 /*wrid*/);
 200
 201         return 0;
 202 }
 203
 204 void enic_dev_stats_clear(struct enic *enic)
 205 {
 206         if (vnic_dev_stats_clear(enic->vdev))
 207                 dev_err(enic, "Error in clearing stats\n");
 208 }
 209
 210 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 211 {
 212         struct vnic_stats *stats;
 213
 214         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 215                 dev_err(enic, "Error in getting stats\n");
 216                 return;
 217         }
 218
 219         r_stats->ipackets = stats->rx.rx_frames_ok;
 220         r_stats->opackets = stats->tx.tx_frames_ok;
 221
 222         r_stats->ibytes = stats->rx.rx_bytes_ok;
 223         r_stats->obytes = stats->tx.tx_bytes_ok;
 224
 225         r_stats->ierrors = stats->rx.rx_errors;
 226         r_stats->oerrors = stats->tx.tx_errors;
 227
 228         r_stats->imcasts = stats->rx.rx_multicast_frames_ok;
 229         r_stats->rx_nombuf = stats->rx.rx_no_bufs;
 230 }
 231
 232 void enic_del_mac_address(struct enic *enic)
 233 {
 234         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 235                 dev_err(enic, "del mac addr failed\n");
 236 }
 237
 238 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 239 {
 240         int err;
 241
 242         if (!is_eth_addr_valid(mac_addr)) {
 243                 dev_err(enic, "invalid mac address\n");
 244                 return;
 245         }
 246
 247         err = vnic_dev_del_addr(enic->vdev, mac_addr);
 248         if (err) {
 249                 dev_err(enic, "del mac addr failed\n");
 250                 return;
 251         }
 252
 253         ether_addr_copy((struct ether_addr *)mac_addr,
 254                 (struct ether_addr *)enic->mac_addr);
 255
 256         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 257         if (err) {
 258                 dev_err(enic, "add mac addr failed\n");
 259                 return;
 260         }
 261 }
 262
 263 static void
 264 enic_free_rq_buf(__rte_unused struct vnic_rq *rq, struct vnic_rq_buf *buf)
 265 {
 266         if (!buf->os_buf)
 267                 return;
 268
 269         rte_pktmbuf_free((struct rte_mbuf *)buf->os_buf);
 270         buf->os_buf = NULL;
 271 }
 272
 273 void enic_init_vnic_resources(struct enic *enic)
 274 {
 275         unsigned int error_interrupt_enable = 1;
 276         unsigned int error_interrupt_offset = 0;
 277         unsigned int index = 0;
 278
 279         for (index = 0; index < enic->rq_count; index++) {
 280                 vnic_rq_init(&enic->rq[index],
 281                         enic_cq_rq(enic, index),
 282                         error_interrupt_enable,
 283                         error_interrupt_offset);
 284         }
 285
 286         for (index = 0; index < enic->wq_count; index++) {
 287                 vnic_wq_init(&enic->wq[index],
 288                         enic_cq_wq(enic, index),
 289                         error_interrupt_enable,
 290                         error_interrupt_offset);
 291         }
 292
 293         vnic_dev_stats_clear(enic->vdev);
 294
 295         for (index = 0; index < enic->cq_count; index++) {
 296                 vnic_cq_init(&enic->cq[index],
 297                         0 /* flow_control_enable */,
 298                         1 /* color_enable */,
 299                         0 /* cq_head */,
 300                         0 /* cq_tail */,
 301                         1 /* cq_tail_color */,
 302                         0 /* interrupt_enable */,
 303                         1 /* cq_entry_enable */,
 304                         0 /* cq_message_enable */,
 305                         0 /* interrupt offset */,
 306                         0 /* cq_message_addr */);
 307         }
 308
 309         vnic_intr_init(&enic->intr,
 310                 enic->config.intr_timer_usec,
 311                 enic->config.intr_timer_type,
 312                 /*mask_on_assertion*/1);
 313 }
 314
 315
 316 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 317 {
 318         struct enic *enic = vnic_dev_priv(rq->vdev);
 319         dma_addr_t dma_addr;
 320         struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
 321         uint8_t type = RQ_ENET_TYPE_ONLY_SOP;
 322         u16 split_hdr_size = vnic_get_hdr_split_size(enic->vdev);
 323         struct rte_mbuf *mbuf = enic_rxmbuf_alloc(rq->mp);
 324         struct rte_mbuf *hdr_mbuf = NULL;
 325
 326         if (!mbuf) {
 327                 dev_err(enic, "mbuf alloc in enic_rq_alloc_buf failed\n");
 328                 return -1;
 329         }
 330
 331         if (unlikely(split_hdr_size)) {
 332                 if (vnic_rq_desc_avail(rq) < 2) {
 333                         rte_mempool_put(mbuf->pool, mbuf);
 334                         return -1;
 335                 }
 336                 hdr_mbuf = enic_rxmbuf_alloc(rq->mp);
 337                 if (!hdr_mbuf) {
 338                         rte_mempool_put(mbuf->pool, mbuf);
 339                         dev_err(enic,
 340                                 "hdr_mbuf alloc in enic_rq_alloc_buf failed\n");
 341                         return -1;
 342                 }
 343
 344                 hdr_mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 345
 346                 hdr_mbuf->nb_segs = 2;
 347                 hdr_mbuf->port = enic->port_id;
 348                 hdr_mbuf->next = mbuf;
 349
 350                 dma_addr = (dma_addr_t)
 351                     (hdr_mbuf->buf_physaddr + hdr_mbuf->data_off);
 352
 353                 rq_enet_desc_enc(desc, dma_addr, type, split_hdr_size);
 354
 355                 vnic_rq_post(rq, (void *)hdr_mbuf, 0 /*os_buf_index*/, dma_addr,
 356                         (unsigned int)split_hdr_size, 0 /*wrid*/);
 357
 358                 desc = vnic_rq_next_desc(rq);
 359                 type = RQ_ENET_TYPE_NOT_SOP;
 360         } else {
 361                 mbuf->nb_segs = 1;
 362                 mbuf->port = enic->port_id;
 363         }
 364
 365         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 366         mbuf->next = NULL;
 367
 368         dma_addr = (dma_addr_t)
 369             (mbuf->buf_physaddr + mbuf->data_off);
 370
 371         rq_enet_desc_enc(desc, dma_addr, type, mbuf->buf_len);
 372
 373         vnic_rq_post(rq, (void *)mbuf, 0 /*os_buf_index*/, dma_addr,
 374                 (unsigned int)mbuf->buf_len, 0 /*wrid*/);
 375
 376         return 0;
 377 }
 378
 379 static int enic_rq_indicate_buf(struct vnic_rq *rq,
 380         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 381         int skipped, void *opaque)
 382 {
 383         struct enic *enic = vnic_dev_priv(rq->vdev);
 384         struct rte_mbuf **rx_pkt_bucket = (struct rte_mbuf **)opaque;
 385         struct rte_mbuf *rx_pkt = NULL;
 386         struct rte_mbuf *hdr_rx_pkt = NULL;
 387
 388         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 389         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 390         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 391         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 392         u8 packet_error;
 393         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
 394         u32 rss_hash;
 395
 396         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 397                 &type, &color, &q_number, &completed_index,
 398                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 399                 &csum_not_calc, &rss_hash, &bytes_written,
 400                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
 401                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 402                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 403                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 404                 &fcs_ok);
 405
 406         rx_pkt = (struct rte_mbuf *)buf->os_buf;
 407         buf->os_buf = NULL;
 408
 409         if (unlikely(packet_error)) {
 410                 dev_err(enic, "packet error\n");
 411                 rx_pkt->data_len = 0;
 412                 return 0;
 413         }
 414
 415         if (unlikely(skipped)) {
 416                 rx_pkt->data_len = 0;
 417                 return 0;
 418         }
 419
 420         if (likely(!vnic_get_hdr_split_size(enic->vdev))) {
 421                 /* No header split configured */
 422                 *rx_pkt_bucket = rx_pkt;
 423                 rx_pkt->pkt_len = bytes_written;
 424
 425                 if (ipv4) {
 426                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV4;
 427                         if (!csum_not_calc) {
 428                                 if (unlikely(!ipv4_csum_ok))
 429                                         rx_pkt->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 430
 431                                 if ((tcp || udp) && (!tcp_udp_csum_ok))
 432                                         rx_pkt->ol_flags |= PKT_RX_L4_CKSUM_BAD;
 433                         }
 434                 } else if (ipv6)
 435                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV6;
 436         } else {
 437                 /* Header split */
 438                 if (sop && !eop) {
 439                         /* This piece is header */
 440                         *rx_pkt_bucket = rx_pkt;
 441                         rx_pkt->pkt_len = bytes_written;
 442                 } else {
 443                         if (sop && eop) {
 444                                 /* The packet is smaller than split_hdr_size */
 445                                 *rx_pkt_bucket = rx_pkt;
 446                                 rx_pkt->pkt_len = bytes_written;
 447                                 if (ipv4) {
 448                                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV4;
 449                                         if (!csum_not_calc) {
 450                                                 if (unlikely(!ipv4_csum_ok))
 451                                                         rx_pkt->ol_flags |=
 452                                                             PKT_RX_IP_CKSUM_BAD;
 453
 454                                                 if ((tcp || udp) &&
 455                                                     (!tcp_udp_csum_ok))
 456                                                         rx_pkt->ol_flags |=
 457                                                             PKT_RX_L4_CKSUM_BAD;
 458                                         }
 459                                 } else if (ipv6)
 460                                         rx_pkt->packet_type = RTE_PTYPE_L3_IPV6;
 461                         } else {
 462                                 /* Payload */
 463                                 hdr_rx_pkt = *rx_pkt_bucket;
 464                                 hdr_rx_pkt->pkt_len += bytes_written;
 465                                 if (ipv4) {
 466                                         hdr_rx_pkt->packet_type =
 467                                                 RTE_PTYPE_L3_IPV4;
 468                                         if (!csum_not_calc) {
 469                                                 if (unlikely(!ipv4_csum_ok))
 470                                                         hdr_rx_pkt->ol_flags |=
 471                                                             PKT_RX_IP_CKSUM_BAD;
 472
 473                                                 if ((tcp || udp) &&
 474                                                     (!tcp_udp_csum_ok))
 475                                                         hdr_rx_pkt->ol_flags |=
 476                                                             PKT_RX_L4_CKSUM_BAD;
 477                                         }
 478                                 } else if (ipv6)
 479                                         hdr_rx_pkt->packet_type =
 480                                                 RTE_PTYPE_L3_IPV6;
 481                         }
 482                 }
 483         }
 484
 485         rx_pkt->data_len = bytes_written;
 486
 487         if (rss_hash) {
 488                 rx_pkt->ol_flags |= PKT_RX_RSS_HASH;
 489                 rx_pkt->hash.rss = rss_hash;
 490         }
 491
 492         if (vlan_tci) {
 493                 rx_pkt->ol_flags |= PKT_RX_VLAN_PKT;
 494                 rx_pkt->vlan_tci = vlan_tci;
 495         }
 496
 497         return eop;
 498 }
 499
 500 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 501         __rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 502 {
 503         struct enic *enic = vnic_dev_priv(vdev);
 504
 505         return vnic_rq_service(&enic->rq[q_number], cq_desc,
 506                 completed_index, VNIC_RQ_RETURN_DESC,
 507                 enic_rq_indicate_buf, opaque);
 508
 509 }
 510
 511 int enic_poll(struct vnic_rq *rq, struct rte_mbuf **rx_pkts,
 512         unsigned int budget, unsigned int *work_done)
 513 {
 514         struct enic *enic = vnic_dev_priv(rq->vdev);
 515         unsigned int cq = enic_cq_rq(enic, rq->index);
 516         int err = 0;
 517
 518         *work_done = vnic_cq_service(&enic->cq[cq],
 519                 budget, enic_rq_service, (void *)rx_pkts);
 520
 521         if (*work_done) {
 522                 vnic_rq_fill(rq, enic_rq_alloc_buf);
 523
 524                 /* Need at least one buffer on ring to get going */
 525                 if (vnic_rq_desc_used(rq) == 0) {
 526                         dev_err(enic, "Unable to alloc receive buffers\n");
 527                         err = -1;
 528                 }
 529         }
 530         return err;
 531 }
 532
 533 static void *
 534 enic_alloc_consistent(__rte_unused void *priv, size_t size,
 535         dma_addr_t *dma_handle, u8 *name)
 536 {
 537         void *vaddr;
 538         const struct rte_memzone *rz;
 539         *dma_handle = 0;
 540
 541         rz = rte_memzone_reserve_aligned((const char *)name,
 542                 size, 0, 0, ENIC_ALIGN);
 543         if (!rz) {
 544                 pr_err("%s : Failed to allocate memory requested for %s",
 545                         __func__, name);
 546                 return NULL;
 547         }
 548
 549         vaddr = rz->addr;
 550         *dma_handle = (dma_addr_t)rz->phys_addr;
 551
 552         return vaddr;
 553 }
 554
 555 static void
 556 enic_free_consistent(__rte_unused struct rte_pci_device *hwdev,
 557         __rte_unused size_t size,
 558         __rte_unused void *vaddr,
 559         __rte_unused dma_addr_t dma_handle)
 560 {
 561         /* Nothing to be done */
 562 }
 563
 564 static void
 565 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 566         void *arg)
 567 {
 568         struct enic *enic = pmd_priv((struct rte_eth_dev *)arg);
 569
 570         vnic_intr_return_all_credits(&enic->intr);
 571
 572         enic_log_q_error(enic);
 573 }
 574
 575 int enic_enable(struct enic *enic)
 576 {
 577         unsigned int index;
 578         struct rte_eth_dev *eth_dev = enic->rte_dev;
 579
 580         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 581         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 582         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
 583
 584         if (enic_clsf_init(enic))
 585                 dev_warning(enic, "Init of hash table for clsf failed."\
 586                         "Flow director feature will not work\n");
 587
 588         /* Fill RQ bufs */
 589         for (index = 0; index < enic->rq_count; index++) {
 590                 vnic_rq_fill(&enic->rq[index], enic_rq_alloc_buf);
 591
 592                 /* Need at least one buffer on ring to get going
 593                 */
 594                 if (vnic_rq_desc_used(&enic->rq[index]) == 0) {
 595                         dev_err(enic, "Unable to alloc receive buffers\n");
 596                         return -1;
 597                 }
 598         }
 599
 600         for (index = 0; index < enic->wq_count; index++)
 601                 vnic_wq_enable(&enic->wq[index]);
 602         for (index = 0; index < enic->rq_count; index++)
 603                 vnic_rq_enable(&enic->rq[index]);
 604
 605         vnic_dev_enable_wait(enic->vdev);
 606
 607         /* Register and enable error interrupt */
 608         rte_intr_callback_register(&(enic->pdev->intr_handle),
 609                 enic_intr_handler, (void *)enic->rte_dev);
 610
 611         rte_intr_enable(&(enic->pdev->intr_handle));
 612         vnic_intr_unmask(&enic->intr);
 613
 614         return 0;
 615 }
 616
 617 int enic_alloc_intr_resources(struct enic *enic)
 618 {
 619         int err;
 620
 621         dev_info(enic, "vNIC resources used:  "\
 622                 "wq %d rq %d cq %d intr %d\n",
 623                 enic->wq_count, enic->rq_count,
 624                 enic->cq_count, enic->intr_count);
 625
 626         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 627         if (err)
 628                 enic_free_vnic_resources(enic);
 629
 630         return err;
 631 }
 632
 633 void enic_free_rq(void *rxq)
 634 {
 635         struct vnic_rq *rq = (struct vnic_rq *)rxq;
 636         struct enic *enic = vnic_dev_priv(rq->vdev);
 637
 638         vnic_rq_free(rq);
 639         vnic_cq_free(&enic->cq[rq->index]);
 640 }
 641
 642 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 643 {
 644         vnic_wq_enable(&enic->wq[queue_idx]);
 645 }
 646
 647 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 648 {
 649         return vnic_wq_disable(&enic->wq[queue_idx]);
 650 }
 651
 652 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 653 {
 654         vnic_rq_enable(&enic->rq[queue_idx]);
 655 }
 656
 657 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 658 {
 659         return vnic_rq_disable(&enic->rq[queue_idx]);
 660 }
 661
 662 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 663         unsigned int socket_id, struct rte_mempool *mp,
 664         uint16_t nb_desc)
 665 {
 666         int err;
 667         struct vnic_rq *rq = &enic->rq[queue_idx];
 668
 669         rq->socket_id = socket_id;
 670         rq->mp = mp;
 671
 672         if (nb_desc) {
 673                 if (nb_desc > enic->config.rq_desc_count) {
 674                         dev_warning(enic,
 675                                 "RQ %d - number of rx desc in cmd line (%d)"\
 676                                 "is greater than that in the UCSM/CIMC adapter"\
 677                                 "policy.  Applying the value in the adapter "\
 678                                 "policy (%d).\n",
 679                                 queue_idx, nb_desc, enic->config.rq_desc_count);
 680                 } else if (nb_desc != enic->config.rq_desc_count) {
 681                         enic->config.rq_desc_count = nb_desc;
 682                         dev_info(enic,
 683                                 "RX Queues - effective number of descs:%d\n",
 684                                 nb_desc);
 685                 }
 686         }
 687
 688         /* Allocate queue resources */
 689         err = vnic_rq_alloc(enic->vdev, &enic->rq[queue_idx], queue_idx,
 690                 enic->config.rq_desc_count,
 691                 sizeof(struct rq_enet_desc));
 692         if (err) {
 693                 dev_err(enic, "error in allocation of rq\n");
 694                 return err;
 695         }
 696
 697         err = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 698                 socket_id, enic->config.rq_desc_count,
 699                 sizeof(struct cq_enet_rq_desc));
 700         if (err) {
 701                 vnic_rq_free(rq);
 702                 dev_err(enic, "error in allocation of cq for rq\n");
 703         }
 704
 705         return err;
 706 }
 707
 708 void enic_free_wq(void *txq)
 709 {
 710         struct vnic_wq *wq = (struct vnic_wq *)txq;
 711         struct enic *enic = vnic_dev_priv(wq->vdev);
 712
 713         vnic_wq_free(wq);
 714         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 715 }
 716
 717 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 718         unsigned int socket_id, uint16_t nb_desc)
 719 {
 720         int err;
 721         struct vnic_wq *wq = &enic->wq[queue_idx];
 722         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 723
 724         wq->socket_id = socket_id;
 725         if (nb_desc) {
 726                 if (nb_desc > enic->config.wq_desc_count) {
 727                         dev_warning(enic,
 728                                 "WQ %d - number of tx desc in cmd line (%d)"\
 729                                 "is greater than that in the UCSM/CIMC adapter"\
 730                                 "policy.  Applying the value in the adapter "\
 731                                 "policy (%d)\n",
 732                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 733                 } else if (nb_desc != enic->config.wq_desc_count) {
 734                         enic->config.wq_desc_count = nb_desc;
 735                         dev_info(enic,
 736                                 "TX Queues - effective number of descs:%d\n",
 737                                 nb_desc);
 738                 }
 739         }
 740
 741         /* Allocate queue resources */
 742         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 743                 enic->config.wq_desc_count,
 744                 sizeof(struct wq_enet_desc));
 745         if (err) {
 746                 dev_err(enic, "error in allocation of wq\n");
 747                 return err;
 748         }
 749
 750         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 751                 socket_id, enic->config.wq_desc_count,
 752                 sizeof(struct cq_enet_wq_desc));
 753         if (err) {
 754                 vnic_wq_free(wq);
 755                 dev_err(enic, "error in allocation of cq for wq\n");
 756         }
 757
 758         return err;
 759 }
 760
 761 int enic_disable(struct enic *enic)
 762 {
 763         unsigned int i;
 764         int err;
 765
 766         vnic_intr_mask(&enic->intr);
 767         (void)vnic_intr_masked(&enic->intr); /* flush write */
 768
 769         vnic_dev_disable(enic->vdev);
 770
 771         enic_clsf_destroy(enic);
 772
 773         if (!enic_is_sriov_vf(enic))
 774                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 775
 776         for (i = 0; i < enic->wq_count; i++) {
 777                 err = vnic_wq_disable(&enic->wq[i]);
 778                 if (err)
 779                         return err;
 780         }
 781         for (i = 0; i < enic->rq_count; i++) {
 782                 err = vnic_rq_disable(&enic->rq[i]);
 783                 if (err)
 784                         return err;
 785         }
 786
 787         vnic_dev_set_reset_flag(enic->vdev, 1);
 788         vnic_dev_notify_unset(enic->vdev);
 789
 790         for (i = 0; i < enic->wq_count; i++)
 791                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 792         for (i = 0; i < enic->rq_count; i++)
 793                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 794         for (i = 0; i < enic->cq_count; i++)
 795                 vnic_cq_clean(&enic->cq[i]);
 796         vnic_intr_clean(&enic->intr);
 797
 798         return 0;
 799 }
 800
 801 static int enic_dev_wait(struct vnic_dev *vdev,
 802         int (*start)(struct vnic_dev *, int),
 803         int (*finished)(struct vnic_dev *, int *),
 804         int arg)
 805 {
 806         int done;
 807         int err;
 808         int i;
 809
 810         err = start(vdev, arg);
 811         if (err)
 812                 return err;
 813
 814         /* Wait for func to complete...2 seconds max */
 815         for (i = 0; i < 2000; i++) {
 816                 err = finished(vdev, &done);
 817                 if (err)
 818                         return err;
 819                 if (done)
 820                         return 0;
 821                 usleep(1000);
 822         }
 823         return -ETIMEDOUT;
 824 }
 825
 826 static int enic_dev_open(struct enic *enic)
 827 {
 828         int err;
 829
 830         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 831                 vnic_dev_open_done, 0);
 832         if (err)
 833                 dev_err(enic_get_dev(enic),
 834                         "vNIC device open failed, err %d\n", err);
 835
 836         return err;
 837 }
 838
 839 static int enic_set_rsskey(struct enic *enic)
 840 {
 841         dma_addr_t rss_key_buf_pa;
 842         union vnic_rss_key *rss_key_buf_va = NULL;
 843         static union vnic_rss_key rss_key = {
 844                 .key = {
 845                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 846                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 847                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 848                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 849                 }
 850         };
 851         int err;
 852         u8 name[NAME_MAX];
 853
 854         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 855         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 856                 &rss_key_buf_pa, name);
 857         if (!rss_key_buf_va)
 858                 return -ENOMEM;
 859
 860         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 861
 862         err = enic_set_rss_key(enic,
 863                 rss_key_buf_pa,
 864                 sizeof(union vnic_rss_key));
 865
 866         enic_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
 867                 rss_key_buf_va, rss_key_buf_pa);
 868
 869         return err;
 870 }
 871
 872 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 873 {
 874         dma_addr_t rss_cpu_buf_pa;
 875         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 876         int i;
 877         int err;
 878         u8 name[NAME_MAX];
 879
 880         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 881         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 882                 &rss_cpu_buf_pa, name);
 883         if (!rss_cpu_buf_va)
 884                 return -ENOMEM;
 885
 886         for (i = 0; i < (1 << rss_hash_bits); i++)
 887                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
 888
 889         err = enic_set_rss_cpu(enic,
 890                 rss_cpu_buf_pa,
 891                 sizeof(union vnic_rss_cpu));
 892
 893         enic_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
 894                 rss_cpu_buf_va, rss_cpu_buf_pa);
 895
 896         return err;
 897 }
 898
 899 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 900         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 901 {
 902         const u8 tso_ipid_split_en = 0;
 903         int err;
 904
 905         /* Enable VLAN tag stripping */
 906
 907         err = enic_set_nic_cfg(enic,
 908                 rss_default_cpu, rss_hash_type,
 909                 rss_hash_bits, rss_base_cpu,
 910                 rss_enable, tso_ipid_split_en,
 911                 enic->ig_vlan_strip_en);
 912
 913         return err;
 914 }
 915
 916 int enic_set_rss_nic_cfg(struct enic *enic)
 917 {
 918         const u8 rss_default_cpu = 0;
 919         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 920             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 921             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 922             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 923         const u8 rss_hash_bits = 7;
 924         const u8 rss_base_cpu = 0;
 925         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 926
 927         if (rss_enable) {
 928                 if (!enic_set_rsskey(enic)) {
 929                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 930                                 rss_enable = 0;
 931                                 dev_warning(enic, "RSS disabled, "\
 932                                         "Failed to set RSS cpu indirection table.");
 933                         }
 934                 } else {
 935                         rss_enable = 0;
 936                         dev_warning(enic,
 937                                 "RSS disabled, Failed to set RSS key.\n");
 938                 }
 939         }
 940
 941         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 942                 rss_hash_bits, rss_base_cpu, rss_enable);
 943 }
 944
 945 int enic_setup_finish(struct enic *enic)
 946 {
 947         int ret;
 948
 949         ret = enic_set_rss_nic_cfg(enic);
 950         if (ret) {
 951                 dev_err(enic, "Failed to config nic, aborting.\n");
 952                 return -1;
 953         }
 954
 955         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 956
 957         /* Default conf */
 958         vnic_dev_packet_filter(enic->vdev,
 959                 1 /* directed  */,
 960                 1 /* multicast */,
 961                 1 /* broadcast */,
 962                 0 /* promisc   */,
 963                 1 /* allmulti  */);
 964
 965         enic->promisc = 0;
 966         enic->allmulti = 1;
 967
 968         return 0;
 969 }
 970
 971 void enic_add_packet_filter(struct enic *enic)
 972 {
 973         /* Args -> directed, multicast, broadcast, promisc, allmulti */
 974         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
 975                 enic->promisc, enic->allmulti);
 976 }
 977
 978 int enic_get_link_status(struct enic *enic)
 979 {
 980         return vnic_dev_link_status(enic->vdev);
 981 }
 982
 983 static void enic_dev_deinit(struct enic *enic)
 984 {
 985         struct rte_eth_dev *eth_dev = enic->rte_dev;
 986
 987         rte_free(eth_dev->data->mac_addrs);
 988 }
 989
 990
 991 int enic_set_vnic_res(struct enic *enic)
 992 {
 993         struct rte_eth_dev *eth_dev = enic->rte_dev;
 994
 995         if ((enic->rq_count < eth_dev->data->nb_rx_queues) ||
 996                 (enic->wq_count < eth_dev->data->nb_tx_queues)) {
 997                 dev_err(dev, "Not enough resources configured, aborting\n");
 998                 return -1;
 999         }
1000
1001         enic->rq_count = eth_dev->data->nb_rx_queues;
1002         enic->wq_count = eth_dev->data->nb_tx_queues;
1003         if (enic->cq_count < (enic->rq_count + enic->wq_count)) {
1004                 dev_err(dev, "Not enough resources configured, aborting\n");
1005                 return -1;
1006         }
1007
1008         enic->cq_count = enic->rq_count + enic->wq_count;
1009         return 0;
1010 }
1011
1012 static int enic_dev_init(struct enic *enic)
1013 {
1014         int err;
1015         struct rte_eth_dev *eth_dev = enic->rte_dev;
1016
1017         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1018
1019         /* Get vNIC configuration
1020         */
1021         err = enic_get_vnic_config(enic);
1022         if (err) {
1023                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1024                 return err;
1025         }
1026
1027         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1028         if (!eth_dev->data->mac_addrs) {
1029                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1030                 return -1;
1031         }
1032         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1033                 &eth_dev->data->mac_addrs[0]);
1034
1035
1036         /* Get available resource counts
1037         */
1038         enic_get_res_counts(enic);
1039
1040         vnic_dev_set_reset_flag(enic->vdev, 0);
1041
1042         return 0;
1043
1044 }
1045
1046 int enic_probe(struct enic *enic)
1047 {
1048         struct rte_pci_device *pdev = enic->pdev;
1049         int err = -1;
1050
1051         dev_debug(enic, " Initializing ENIC PMD version %s\n", DRV_VERSION);
1052
1053         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1054         enic->bar0.len = pdev->mem_resource[0].len;
1055
1056         /* Register vNIC device */
1057         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1058         if (!enic->vdev) {
1059                 dev_err(enic, "vNIC registration failed, aborting\n");
1060                 goto err_out;
1061         }
1062
1063         vnic_register_cbacks(enic->vdev,
1064                 enic_alloc_consistent,
1065                 enic_free_consistent);
1066
1067         /* Issue device open to get device in known state */
1068         err = enic_dev_open(enic);
1069         if (err) {
1070                 dev_err(enic, "vNIC dev open failed, aborting\n");
1071                 goto err_out_unregister;
1072         }
1073
1074         /* Set ingress vlan rewrite mode before vnic initialization */
1075         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1076                 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
1077         if (err) {
1078                 dev_err(enic,
1079                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1080                 goto err_out_dev_close;
1081         }
1082
1083         /* Issue device init to initialize the vnic-to-switch link.
1084          * We'll start with carrier off and wait for link UP
1085          * notification later to turn on carrier.  We don't need
1086          * to wait here for the vnic-to-switch link initialization
1087          * to complete; link UP notification is the indication that
1088          * the process is complete.
1089          */
1090
1091         err = vnic_dev_init(enic->vdev, 0);
1092         if (err) {
1093                 dev_err(enic, "vNIC dev init failed, aborting\n");
1094                 goto err_out_dev_close;
1095         }
1096
1097         err = enic_dev_init(enic);
1098         if (err) {
1099                 dev_err(enic, "Device initialization failed, aborting\n");
1100                 goto err_out_dev_close;
1101         }
1102
1103         return 0;
1104
1105 err_out_dev_close:
1106         vnic_dev_close(enic->vdev);
1107 err_out_unregister:
1108         vnic_dev_unregister(enic->vdev);
1109 err_out:
1110         return err;
1111 }
1112
1113 void enic_remove(struct enic *enic)
1114 {
1115         enic_dev_deinit(enic);
1116         vnic_dev_close(enic->vdev);
1117         vnic_dev_unregister(enic->vdev);
1118 }