drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_atomic.h>
  46 #include <rte_branch_prediction.h>
  47 #include <rte_pci.h>
  48 #include <rte_ether.h>
  49 #include <rte_common.h>
  50 #include <rte_errno.h>
  51
  52 #include <rte_memory.h>
  53 #include <rte_eal.h>
  54 #include <rte_dev.h>
  55
  56 #include "virtio_ethdev.h"
  57 #include "virtio_pci.h"
  58 #include "virtio_logs.h"
  59 #include "virtqueue.h"
  60 #include "virtio_rxtx.h"
  61
  62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  64 static int  virtio_dev_start(struct rte_eth_dev *dev);
  65 static void virtio_dev_stop(struct rte_eth_dev *dev);
  66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  71                                 struct rte_eth_dev_info *dev_info);
  72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  73         __rte_unused int wait_to_complete);
  74
  75 static void virtio_set_hwaddr(struct virtio_hw *hw);
  76 static void virtio_get_hwaddr(struct virtio_hw *hw);
  77
  78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  79                                  struct rte_eth_stats *stats);
  80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_xstat *xstats, unsigned n);
  82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  83                                        struct rte_eth_xstat_name *xstats_names,
  84                                        unsigned limit);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 108         { .vendor_id = 0, /* sentinel */ },
 109 };
 110
 111 struct rte_virtio_xstats_name_off {
 112         char name[RTE_ETH_XSTATS_NAME_SIZE];
 113         unsigned offset;
 114 };
 115
 116 /* [rt]x_qX_ is prepended to the name string here */
 117 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 118         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 119         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 120         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 121         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 122         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 123         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 124         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 125         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 126         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 127         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 128         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 129         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 130         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 131 };
 132
 133 /* [rt]x_qX_ is prepended to the name string here */
 134 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 135         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 136         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 137         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 138         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 139         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 140         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 141         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 142         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 143         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 144         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 145         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 146         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 147         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 148 };
 149
 150 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 151                             sizeof(rte_virtio_rxq_stat_strings[0]))
 152 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 153                             sizeof(rte_virtio_txq_stat_strings[0]))
 154
 155 static int
 156 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 157                 int *dlen, int pkt_num)
 158 {
 159         uint32_t head, i;
 160         int k, sum = 0;
 161         virtio_net_ctrl_ack status = ~0;
 162         struct virtio_pmd_ctrl result;
 163         struct virtqueue *vq;
 164
 165         ctrl->status = status;
 166
 167         if (!cvq || !cvq->vq) {
 168                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 169                 return -1;
 170         }
 171         vq = cvq->vq;
 172         head = vq->vq_desc_head_idx;
 173
 174         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 175                 "vq->hw->cvq = %p vq = %p",
 176                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 177
 178         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 179                 return -1;
 180
 181         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 182                 sizeof(struct virtio_pmd_ctrl));
 183
 184         /*
 185          * Format is enforced in qemu code:
 186          * One TX packet for header;
 187          * At least one TX packet per argument;
 188          * One RX packet for ACK.
 189          */
 190         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 191         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 192         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 193         vq->vq_free_cnt--;
 194         i = vq->vq_ring.desc[head].next;
 195
 196         for (k = 0; k < pkt_num; k++) {
 197                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 198                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 199                         + sizeof(struct virtio_net_ctrl_hdr)
 200                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 201                 vq->vq_ring.desc[i].len = dlen[k];
 202                 sum += dlen[k];
 203                 vq->vq_free_cnt--;
 204                 i = vq->vq_ring.desc[i].next;
 205         }
 206
 207         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 208         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 209                         + sizeof(struct virtio_net_ctrl_hdr);
 210         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 211         vq->vq_free_cnt--;
 212
 213         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 214
 215         vq_update_avail_ring(vq, head);
 216         vq_update_avail_idx(vq);
 217
 218         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 219
 220         virtqueue_notify(vq);
 221
 222         rte_rmb();
 223         while (VIRTQUEUE_NUSED(vq) == 0) {
 224                 rte_rmb();
 225                 usleep(100);
 226         }
 227
 228         while (VIRTQUEUE_NUSED(vq)) {
 229                 uint32_t idx, desc_idx, used_idx;
 230                 struct vring_used_elem *uep;
 231
 232                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 233                                 & (vq->vq_nentries - 1));
 234                 uep = &vq->vq_ring.used->ring[used_idx];
 235                 idx = (uint32_t) uep->id;
 236                 desc_idx = idx;
 237
 238                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 239                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 240                         vq->vq_free_cnt++;
 241                 }
 242
 243                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 244                 vq->vq_desc_head_idx = idx;
 245
 246                 vq->vq_used_cons_idx++;
 247                 vq->vq_free_cnt++;
 248         }
 249
 250         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 251                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 252
 253         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 254                         sizeof(struct virtio_pmd_ctrl));
 255
 256         return result.status;
 257 }
 258
 259 static int
 260 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 261 {
 262         struct virtio_hw *hw = dev->data->dev_private;
 263         struct virtio_pmd_ctrl ctrl;
 264         int dlen[1];
 265         int ret;
 266
 267         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 268         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 269         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 270
 271         dlen[0] = sizeof(uint16_t);
 272
 273         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 274         if (ret) {
 275                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 276                           "failed, this is too late now...");
 277                 return -EINVAL;
 278         }
 279
 280         return 0;
 281 }
 282
 283 void
 284 virtio_dev_queue_release(struct virtqueue *vq)
 285 {
 286         struct virtio_hw *hw;
 287
 288         if (vq) {
 289                 hw = vq->hw;
 290                 if (vq->configured)
 291                         hw->vtpci_ops->del_queue(hw, vq);
 292
 293                 rte_free(vq->sw_ring);
 294                 rte_free(vq);
 295         }
 296 }
 297
 298 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 299                         int queue_type,
 300                         uint16_t queue_idx,
 301                         uint16_t vtpci_queue_idx,
 302                         uint16_t nb_desc,
 303                         unsigned int socket_id,
 304                         void **pvq)
 305 {
 306         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 307         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 308         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 309         unsigned int vq_size, size;
 310         struct virtio_hw *hw = dev->data->dev_private;
 311         struct virtnet_rx *rxvq = NULL;
 312         struct virtnet_tx *txvq = NULL;
 313         struct virtnet_ctl *cvq = NULL;
 314         struct virtqueue *vq;
 315         const char *queue_names[] = {"rvq", "txq", "cvq"};
 316         size_t sz_vq, sz_q = 0, sz_hdr_mz = 0;
 317         void *sw_ring = NULL;
 318         int ret;
 319
 320         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 321
 322         /*
 323          * Read the virtqueue size from the Queue Size field
 324          * Always power of 2 and if 0 virtqueue does not exist
 325          */
 326         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 327         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 328         if (vq_size == 0) {
 329                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 330                 return -EINVAL;
 331         }
 332
 333         if (!rte_is_power_of_2(vq_size)) {
 334                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 335                 return -EINVAL;
 336         }
 337
 338         snprintf(vq_name, sizeof(vq_name), "port%d_%s%d",
 339                  dev->data->port_id, queue_names[queue_type], queue_idx);
 340
 341         sz_vq = RTE_ALIGN_CEIL(sizeof(*vq) +
 342                                 vq_size * sizeof(struct vq_desc_extra),
 343                                 RTE_CACHE_LINE_SIZE);
 344         if (queue_type == VTNET_RQ) {
 345                 sz_q = sz_vq + sizeof(*rxvq);
 346         } else if (queue_type == VTNET_TQ) {
 347                 sz_q = sz_vq + sizeof(*txvq);
 348                 /*
 349                  * For each xmit packet, allocate a virtio_net_hdr
 350                  * and indirect ring elements
 351                  */
 352                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 353         } else if (queue_type == VTNET_CQ) {
 354                 sz_q = sz_vq + sizeof(*cvq);
 355                 /* Allocate a page for control vq command, data and status */
 356                 sz_hdr_mz = PAGE_SIZE;
 357         }
 358
 359         vq = rte_zmalloc_socket(vq_name, sz_q, RTE_CACHE_LINE_SIZE, socket_id);
 360         if (vq == NULL) {
 361                 PMD_INIT_LOG(ERR, "can not allocate vq");
 362                 return -ENOMEM;
 363         }
 364         vq->hw = hw;
 365         vq->vq_queue_index = vtpci_queue_idx;
 366         vq->vq_nentries = vq_size;
 367
 368         if (nb_desc == 0 || nb_desc > vq_size)
 369                 nb_desc = vq_size;
 370         vq->vq_free_cnt = nb_desc;
 371
 372         /*
 373          * Reserve a memzone for vring elements
 374          */
 375         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 376         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 377         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 378                      size, vq->vq_ring_size);
 379
 380         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, socket_id,
 381                                          0, VIRTIO_PCI_VRING_ALIGN);
 382         if (mz == NULL) {
 383                 if (rte_errno == EEXIST)
 384                         mz = rte_memzone_lookup(vq_name);
 385                 if (mz == NULL) {
 386                         ret = -ENOMEM;
 387                         goto fail_q_alloc;
 388                 }
 389         }
 390
 391         memset(mz->addr, 0, sizeof(mz->len));
 392
 393         vq->vq_ring_mem = mz->phys_addr;
 394         vq->vq_ring_virt_mem = mz->addr;
 395         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 396                      (uint64_t)mz->phys_addr);
 397         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 398                      (uint64_t)(uintptr_t)mz->addr);
 399
 400         if (sz_hdr_mz) {
 401                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_%s%d_hdr",
 402                          dev->data->port_id, queue_names[queue_type],
 403                          queue_idx);
 404                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 405                                                      socket_id, 0,
 406                                                      RTE_CACHE_LINE_SIZE);
 407                 if (hdr_mz == NULL) {
 408                         if (rte_errno == EEXIST)
 409                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 410                         if (hdr_mz == NULL) {
 411                                 ret = -ENOMEM;
 412                                 goto fail_q_alloc;
 413                         }
 414                 }
 415         }
 416
 417         if (queue_type == VTNET_RQ) {
 418                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 419                                sizeof(vq->sw_ring[0]);
 420
 421                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 422                                              RTE_CACHE_LINE_SIZE, socket_id);
 423                 if (!sw_ring) {
 424                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 425                         ret = -ENOMEM;
 426                         goto fail_q_alloc;
 427                 }
 428
 429                 vq->sw_ring = sw_ring;
 430                 rxvq = (struct virtnet_rx *)RTE_PTR_ADD(vq, sz_vq);
 431                 rxvq->vq = vq;
 432                 rxvq->port_id = dev->data->port_id;
 433                 rxvq->queue_id = queue_idx;
 434                 rxvq->mz = mz;
 435                 *pvq = rxvq;
 436         } else if (queue_type == VTNET_TQ) {
 437                 txvq = (struct virtnet_tx *)RTE_PTR_ADD(vq, sz_vq);
 438                 txvq->vq = vq;
 439                 txvq->port_id = dev->data->port_id;
 440                 txvq->queue_id = queue_idx;
 441                 txvq->mz = mz;
 442                 txvq->virtio_net_hdr_mz = hdr_mz;
 443                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 444
 445                 *pvq = txvq;
 446         } else if (queue_type == VTNET_CQ) {
 447                 cvq = (struct virtnet_ctl *)RTE_PTR_ADD(vq, sz_vq);
 448                 cvq->vq = vq;
 449                 cvq->mz = mz;
 450                 cvq->virtio_net_hdr_mz = hdr_mz;
 451                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 452                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 453                 *pvq = cvq;
 454         }
 455
 456         /* For virtio_user case (that is when dev->pci_dev is NULL), we use
 457          * virtual address. And we need properly set _offset_, please see
 458          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 459          */
 460         if (dev->pci_dev)
 461                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 462         else {
 463                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 464                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 465                 if (queue_type == VTNET_TQ)
 466                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 467                 else if (queue_type == VTNET_CQ)
 468                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 469         }
 470
 471         if (queue_type == VTNET_TQ) {
 472                 struct virtio_tx_region *txr;
 473                 unsigned int i;
 474
 475                 txr = hdr_mz->addr;
 476                 memset(txr, 0, vq_size * sizeof(*txr));
 477                 for (i = 0; i < vq_size; i++) {
 478                         struct vring_desc *start_dp = txr[i].tx_indir;
 479
 480                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 481
 482                         /* first indirect descriptor is always the tx header */
 483                         start_dp->addr = txvq->virtio_net_hdr_mem
 484                                 + i * sizeof(*txr)
 485                                 + offsetof(struct virtio_tx_region, tx_hdr);
 486
 487                         start_dp->len = hw->vtnet_hdr_size;
 488                         start_dp->flags = VRING_DESC_F_NEXT;
 489                 }
 490         }
 491
 492         if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
 493                 PMD_INIT_LOG(ERR, "setup_queue failed");
 494                 virtio_dev_queue_release(vq);
 495                 return -EINVAL;
 496         }
 497
 498         vq->configured = 1;
 499         return 0;
 500
 501 fail_q_alloc:
 502         rte_free(sw_ring);
 503         rte_memzone_free(hdr_mz);
 504         rte_memzone_free(mz);
 505         rte_free(vq);
 506
 507         return ret;
 508 }
 509
 510 static int
 511 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 512                 uint32_t socket_id)
 513 {
 514         struct virtnet_ctl *cvq;
 515         int ret;
 516         struct virtio_hw *hw = dev->data->dev_private;
 517
 518         PMD_INIT_FUNC_TRACE();
 519         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 520                         vtpci_queue_idx, 0, socket_id, (void **)&cvq);
 521         if (ret < 0) {
 522                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 523                 return ret;
 524         }
 525
 526         hw->cvq = cvq;
 527         return 0;
 528 }
 529
 530 static void
 531 virtio_free_queues(struct rte_eth_dev *dev)
 532 {
 533         unsigned int i;
 534
 535         for (i = 0; i < dev->data->nb_rx_queues; i++)
 536                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 537
 538         dev->data->nb_rx_queues = 0;
 539
 540         for (i = 0; i < dev->data->nb_tx_queues; i++)
 541                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 542
 543         dev->data->nb_tx_queues = 0;
 544 }
 545
 546 static void
 547 virtio_dev_close(struct rte_eth_dev *dev)
 548 {
 549         struct virtio_hw *hw = dev->data->dev_private;
 550
 551         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 552
 553         if (hw->started == 1)
 554                 virtio_dev_stop(dev);
 555
 556         if (hw->cvq)
 557                 virtio_dev_queue_release(hw->cvq->vq);
 558
 559         /* reset the NIC */
 560         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 561                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 562         vtpci_reset(hw);
 563         virtio_dev_free_mbufs(dev);
 564         virtio_free_queues(dev);
 565 }
 566
 567 static void
 568 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 569 {
 570         struct virtio_hw *hw = dev->data->dev_private;
 571         struct virtio_pmd_ctrl ctrl;
 572         int dlen[1];
 573         int ret;
 574
 575         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 576                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 577                 return;
 578         }
 579
 580         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 581         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 582         ctrl.data[0] = 1;
 583         dlen[0] = 1;
 584
 585         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 586         if (ret)
 587                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 588 }
 589
 590 static void
 591 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 592 {
 593         struct virtio_hw *hw = dev->data->dev_private;
 594         struct virtio_pmd_ctrl ctrl;
 595         int dlen[1];
 596         int ret;
 597
 598         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 599                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 600                 return;
 601         }
 602
 603         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 604         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 605         ctrl.data[0] = 0;
 606         dlen[0] = 1;
 607
 608         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 609         if (ret)
 610                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 611 }
 612
 613 static void
 614 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 615 {
 616         struct virtio_hw *hw = dev->data->dev_private;
 617         struct virtio_pmd_ctrl ctrl;
 618         int dlen[1];
 619         int ret;
 620
 621         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 622                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 623                 return;
 624         }
 625
 626         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 627         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 628         ctrl.data[0] = 1;
 629         dlen[0] = 1;
 630
 631         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 632         if (ret)
 633                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 634 }
 635
 636 static void
 637 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 638 {
 639         struct virtio_hw *hw = dev->data->dev_private;
 640         struct virtio_pmd_ctrl ctrl;
 641         int dlen[1];
 642         int ret;
 643
 644         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 645                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 646                 return;
 647         }
 648
 649         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 650         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 651         ctrl.data[0] = 0;
 652         dlen[0] = 1;
 653
 654         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 655         if (ret)
 656                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 657 }
 658
 659 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 660 static int
 661 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 662 {
 663         struct virtio_hw *hw = dev->data->dev_private;
 664         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 665                                  hw->vtnet_hdr_size;
 666         uint32_t frame_size = mtu + ether_hdr_len;
 667
 668         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 669                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 670                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 671                 return -EINVAL;
 672         }
 673         return 0;
 674 }
 675
 676 /*
 677  * dev_ops for virtio, bare necessities for basic operation
 678  */
 679 static const struct eth_dev_ops virtio_eth_dev_ops = {
 680         .dev_configure           = virtio_dev_configure,
 681         .dev_start               = virtio_dev_start,
 682         .dev_stop                = virtio_dev_stop,
 683         .dev_close               = virtio_dev_close,
 684         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 685         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 686         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 687         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 688         .mtu_set                 = virtio_mtu_set,
 689         .dev_infos_get           = virtio_dev_info_get,
 690         .stats_get               = virtio_dev_stats_get,
 691         .xstats_get              = virtio_dev_xstats_get,
 692         .xstats_get_names        = virtio_dev_xstats_get_names,
 693         .stats_reset             = virtio_dev_stats_reset,
 694         .xstats_reset            = virtio_dev_stats_reset,
 695         .link_update             = virtio_dev_link_update,
 696         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 697         .rx_queue_release        = virtio_dev_rx_queue_release,
 698         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 699         .tx_queue_release        = virtio_dev_tx_queue_release,
 700         /* collect stats per queue */
 701         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 702         .vlan_filter_set         = virtio_vlan_filter_set,
 703         .mac_addr_add            = virtio_mac_addr_add,
 704         .mac_addr_remove         = virtio_mac_addr_remove,
 705         .mac_addr_set            = virtio_mac_addr_set,
 706 };
 707
 708 static inline int
 709 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 710                                 struct rte_eth_link *link)
 711 {
 712         struct rte_eth_link *dst = link;
 713         struct rte_eth_link *src = &(dev->data->dev_link);
 714
 715         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 716                         *(uint64_t *)src) == 0)
 717                 return -1;
 718
 719         return 0;
 720 }
 721
 722 /**
 723  * Atomically writes the link status information into global
 724  * structure rte_eth_dev.
 725  *
 726  * @param dev
 727  *   - Pointer to the structure rte_eth_dev to read from.
 728  *   - Pointer to the buffer to be saved with the link status.
 729  *
 730  * @return
 731  *   - On success, zero.
 732  *   - On failure, negative value.
 733  */
 734 static inline int
 735 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 736                 struct rte_eth_link *link)
 737 {
 738         struct rte_eth_link *dst = &(dev->data->dev_link);
 739         struct rte_eth_link *src = link;
 740
 741         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 742                                         *(uint64_t *)src) == 0)
 743                 return -1;
 744
 745         return 0;
 746 }
 747
 748 static void
 749 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 750 {
 751         unsigned i;
 752
 753         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 754                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 755                 if (txvq == NULL)
 756                         continue;
 757
 758                 stats->opackets += txvq->stats.packets;
 759                 stats->obytes += txvq->stats.bytes;
 760                 stats->oerrors += txvq->stats.errors;
 761
 762                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 763                         stats->q_opackets[i] = txvq->stats.packets;
 764                         stats->q_obytes[i] = txvq->stats.bytes;
 765                 }
 766         }
 767
 768         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 769                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 770                 if (rxvq == NULL)
 771                         continue;
 772
 773                 stats->ipackets += rxvq->stats.packets;
 774                 stats->ibytes += rxvq->stats.bytes;
 775                 stats->ierrors += rxvq->stats.errors;
 776
 777                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 778                         stats->q_ipackets[i] = rxvq->stats.packets;
 779                         stats->q_ibytes[i] = rxvq->stats.bytes;
 780                 }
 781         }
 782
 783         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 784 }
 785
 786 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 787                                        struct rte_eth_xstat_name *xstats_names,
 788                                        __rte_unused unsigned limit)
 789 {
 790         unsigned i;
 791         unsigned count = 0;
 792         unsigned t;
 793
 794         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 795                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 796
 797         if (xstats_names != NULL) {
 798                 /* Note: limit checked in rte_eth_xstats_names() */
 799
 800                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 801                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 802                         if (rxvq == NULL)
 803                                 continue;
 804                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 805                                 snprintf(xstats_names[count].name,
 806                                         sizeof(xstats_names[count].name),
 807                                         "rx_q%u_%s", i,
 808                                         rte_virtio_rxq_stat_strings[t].name);
 809                                 count++;
 810                         }
 811                 }
 812
 813                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 814                         struct virtqueue *txvq = dev->data->tx_queues[i];
 815                         if (txvq == NULL)
 816                                 continue;
 817                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 818                                 snprintf(xstats_names[count].name,
 819                                         sizeof(xstats_names[count].name),
 820                                         "tx_q%u_%s", i,
 821                                         rte_virtio_txq_stat_strings[t].name);
 822                                 count++;
 823                         }
 824                 }
 825                 return count;
 826         }
 827         return nstats;
 828 }
 829
 830 static int
 831 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 832                       unsigned n)
 833 {
 834         unsigned i;
 835         unsigned count = 0;
 836
 837         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 838                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 839
 840         if (n < nstats)
 841                 return nstats;
 842
 843         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 844                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 845
 846                 if (rxvq == NULL)
 847                         continue;
 848
 849                 unsigned t;
 850
 851                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 852                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 853                                 rte_virtio_rxq_stat_strings[t].offset);
 854                         count++;
 855                 }
 856         }
 857
 858         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 859                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 860
 861                 if (txvq == NULL)
 862                         continue;
 863
 864                 unsigned t;
 865
 866                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 867                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 868                                 rte_virtio_txq_stat_strings[t].offset);
 869                         count++;
 870                 }
 871         }
 872
 873         return count;
 874 }
 875
 876 static void
 877 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 878 {
 879         virtio_update_stats(dev, stats);
 880 }
 881
 882 static void
 883 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 884 {
 885         unsigned int i;
 886
 887         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 888                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 889                 if (txvq == NULL)
 890                         continue;
 891
 892                 txvq->stats.packets = 0;
 893                 txvq->stats.bytes = 0;
 894                 txvq->stats.errors = 0;
 895                 txvq->stats.multicast = 0;
 896                 txvq->stats.broadcast = 0;
 897                 memset(txvq->stats.size_bins, 0,
 898                        sizeof(txvq->stats.size_bins[0]) * 8);
 899         }
 900
 901         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 902                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 903                 if (rxvq == NULL)
 904                         continue;
 905
 906                 rxvq->stats.packets = 0;
 907                 rxvq->stats.bytes = 0;
 908                 rxvq->stats.errors = 0;
 909                 rxvq->stats.multicast = 0;
 910                 rxvq->stats.broadcast = 0;
 911                 memset(rxvq->stats.size_bins, 0,
 912                        sizeof(rxvq->stats.size_bins[0]) * 8);
 913         }
 914 }
 915
 916 static void
 917 virtio_set_hwaddr(struct virtio_hw *hw)
 918 {
 919         vtpci_write_dev_config(hw,
 920                         offsetof(struct virtio_net_config, mac),
 921                         &hw->mac_addr, ETHER_ADDR_LEN);
 922 }
 923
 924 static void
 925 virtio_get_hwaddr(struct virtio_hw *hw)
 926 {
 927         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 928                 vtpci_read_dev_config(hw,
 929                         offsetof(struct virtio_net_config, mac),
 930                         &hw->mac_addr, ETHER_ADDR_LEN);
 931         } else {
 932                 eth_random_addr(&hw->mac_addr[0]);
 933                 virtio_set_hwaddr(hw);
 934         }
 935 }
 936
 937 static void
 938 virtio_mac_table_set(struct virtio_hw *hw,
 939                      const struct virtio_net_ctrl_mac *uc,
 940                      const struct virtio_net_ctrl_mac *mc)
 941 {
 942         struct virtio_pmd_ctrl ctrl;
 943         int err, len[2];
 944
 945         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 946                 PMD_DRV_LOG(INFO, "host does not support mac table");
 947                 return;
 948         }
 949
 950         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 951         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 952
 953         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 954         memcpy(ctrl.data, uc, len[0]);
 955
 956         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 957         memcpy(ctrl.data + len[0], mc, len[1]);
 958
 959         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 960         if (err != 0)
 961                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 962 }
 963
 964 static void
 965 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 966                     uint32_t index, uint32_t vmdq __rte_unused)
 967 {
 968         struct virtio_hw *hw = dev->data->dev_private;
 969         const struct ether_addr *addrs = dev->data->mac_addrs;
 970         unsigned int i;
 971         struct virtio_net_ctrl_mac *uc, *mc;
 972
 973         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 974                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 975                 return;
 976         }
 977
 978         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 979         uc->entries = 0;
 980         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 981         mc->entries = 0;
 982
 983         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 984                 const struct ether_addr *addr
 985                         = (i == index) ? mac_addr : addrs + i;
 986                 struct virtio_net_ctrl_mac *tbl
 987                         = is_multicast_ether_addr(addr) ? mc : uc;
 988
 989                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 990         }
 991
 992         virtio_mac_table_set(hw, uc, mc);
 993 }
 994
 995 static void
 996 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 997 {
 998         struct virtio_hw *hw = dev->data->dev_private;
 999         struct ether_addr *addrs = dev->data->mac_addrs;
1000         struct virtio_net_ctrl_mac *uc, *mc;
1001         unsigned int i;
1002
1003         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1004                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1005                 return;
1006         }
1007
1008         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1009         uc->entries = 0;
1010         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1011         mc->entries = 0;
1012
1013         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1014                 struct virtio_net_ctrl_mac *tbl;
1015
1016                 if (i == index || is_zero_ether_addr(addrs + i))
1017                         continue;
1018
1019                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1020                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1021         }
1022
1023         virtio_mac_table_set(hw, uc, mc);
1024 }
1025
1026 static void
1027 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1028 {
1029         struct virtio_hw *hw = dev->data->dev_private;
1030
1031         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1032
1033         /* Use atomic update if available */
1034         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1035                 struct virtio_pmd_ctrl ctrl;
1036                 int len = ETHER_ADDR_LEN;
1037
1038                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1039                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1040
1041                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1042                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1043         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1044                 virtio_set_hwaddr(hw);
1045 }
1046
1047 static int
1048 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1049 {
1050         struct virtio_hw *hw = dev->data->dev_private;
1051         struct virtio_pmd_ctrl ctrl;
1052         int len;
1053
1054         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1055                 return -ENOTSUP;
1056
1057         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1058         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1059         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1060         len = sizeof(vlan_id);
1061
1062         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1063 }
1064
1065 static int
1066 virtio_negotiate_features(struct virtio_hw *hw)
1067 {
1068         uint64_t host_features;
1069
1070         /* Prepare guest_features: feature that driver wants to support */
1071         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
1072         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1073                 hw->guest_features);
1074
1075         /* Read device(host) feature bits */
1076         host_features = hw->vtpci_ops->get_features(hw);
1077         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1078                 host_features);
1079
1080         /*
1081          * Negotiate features: Subset of device feature bits are written back
1082          * guest feature bits.
1083          */
1084         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1085         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1086                 hw->guest_features);
1087
1088         if (hw->modern) {
1089                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1090                         PMD_INIT_LOG(ERR,
1091                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1092                         return -1;
1093                 }
1094                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1095                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1096                         PMD_INIT_LOG(ERR,
1097                                 "failed to set FEATURES_OK status!");
1098                         return -1;
1099                 }
1100         }
1101
1102         return 0;
1103 }
1104
1105 /*
1106  * Process Virtio Config changed interrupt and call the callback
1107  * if link state changed.
1108  */
1109 static void
1110 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1111                          void *param)
1112 {
1113         struct rte_eth_dev *dev = param;
1114         struct virtio_hw *hw = dev->data->dev_private;
1115         uint8_t isr;
1116
1117         /* Read interrupt status which clears interrupt */
1118         isr = vtpci_isr(hw);
1119         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1120
1121         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1122                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1123
1124         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1125                 if (virtio_dev_link_update(dev, 0) == 0)
1126                         _rte_eth_dev_callback_process(dev,
1127                                                       RTE_ETH_EVENT_INTR_LSC);
1128         }
1129
1130 }
1131
1132 static void
1133 rx_func_get(struct rte_eth_dev *eth_dev)
1134 {
1135         struct virtio_hw *hw = eth_dev->data->dev_private;
1136         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1137                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1138         else
1139                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1140 }
1141
1142 static int
1143 virtio_init_device(struct rte_eth_dev *eth_dev)
1144 {
1145         struct virtio_hw *hw = eth_dev->data->dev_private;
1146         struct virtio_net_config *config;
1147         struct virtio_net_config local_config;
1148         struct rte_pci_device *pci_dev = eth_dev->pci_dev;
1149
1150         /* Reset the device although not necessary at startup */
1151         vtpci_reset(hw);
1152
1153         /* Tell the host we've noticed this device. */
1154         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1155
1156         /* Tell the host we've known how to drive the device. */
1157         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1158         if (virtio_negotiate_features(hw) < 0)
1159                 return -1;
1160
1161         /* If host does not support status then disable LSC */
1162         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1163                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1164         else
1165                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1166
1167         rte_eth_copy_pci_info(eth_dev, pci_dev);
1168
1169         rx_func_get(eth_dev);
1170
1171         /* Setting up rx_header size for the device */
1172         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1173             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1174                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1175         else
1176                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1177
1178         /* Copy the permanent MAC address to: virtio_hw */
1179         virtio_get_hwaddr(hw);
1180         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1181                         &eth_dev->data->mac_addrs[0]);
1182         PMD_INIT_LOG(DEBUG,
1183                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1184                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1185                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1186
1187         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1188                 config = &local_config;
1189
1190                 vtpci_read_dev_config(hw,
1191                         offsetof(struct virtio_net_config, mac),
1192                         &config->mac, sizeof(config->mac));
1193
1194                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1195                         vtpci_read_dev_config(hw,
1196                                 offsetof(struct virtio_net_config, status),
1197                                 &config->status, sizeof(config->status));
1198                 } else {
1199                         PMD_INIT_LOG(DEBUG,
1200                                      "VIRTIO_NET_F_STATUS is not supported");
1201                         config->status = 0;
1202                 }
1203
1204                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1205                         vtpci_read_dev_config(hw,
1206                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1207                                 &config->max_virtqueue_pairs,
1208                                 sizeof(config->max_virtqueue_pairs));
1209                 } else {
1210                         PMD_INIT_LOG(DEBUG,
1211                                      "VIRTIO_NET_F_MQ is not supported");
1212                         config->max_virtqueue_pairs = 1;
1213                 }
1214
1215                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1216
1217                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1218                                 config->max_virtqueue_pairs);
1219                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1220                 PMD_INIT_LOG(DEBUG,
1221                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1222                                 config->mac[0], config->mac[1],
1223                                 config->mac[2], config->mac[3],
1224                                 config->mac[4], config->mac[5]);
1225         } else {
1226                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1227                 hw->max_queue_pairs = 1;
1228         }
1229
1230         if (pci_dev)
1231                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1232                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1233                         pci_dev->id.device_id);
1234
1235         return 0;
1236 }
1237
1238 /*
1239  * This function is based on probe() function in virtio_pci.c
1240  * It returns 0 on success.
1241  */
1242 int
1243 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1244 {
1245         struct virtio_hw *hw = eth_dev->data->dev_private;
1246         struct rte_pci_device *pci_dev;
1247         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1248         int ret;
1249
1250         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1251
1252         eth_dev->dev_ops = &virtio_eth_dev_ops;
1253         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1254
1255         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1256                 rx_func_get(eth_dev);
1257                 return 0;
1258         }
1259
1260         /* Allocate memory for storing MAC addresses */
1261         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1262         if (eth_dev->data->mac_addrs == NULL) {
1263                 PMD_INIT_LOG(ERR,
1264                         "Failed to allocate %d bytes needed to store MAC addresses",
1265                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1266                 return -ENOMEM;
1267         }
1268
1269         pci_dev = eth_dev->pci_dev;
1270
1271         if (pci_dev) {
1272                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1273                 if (ret)
1274                         return ret;
1275         }
1276
1277         eth_dev->data->dev_flags = dev_flags;
1278
1279         /* reset device and negotiate features */
1280         ret = virtio_init_device(eth_dev);
1281         if (ret < 0)
1282                 return ret;
1283
1284         /* Setup interrupt callback  */
1285         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1286                 rte_intr_callback_register(&pci_dev->intr_handle,
1287                         virtio_interrupt_handler, eth_dev);
1288
1289         return 0;
1290 }
1291
1292 static int
1293 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1294 {
1295         struct rte_pci_device *pci_dev;
1296
1297         PMD_INIT_FUNC_TRACE();
1298
1299         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1300                 return -EPERM;
1301
1302         /* Close it anyway since there's no way to know if closed */
1303         virtio_dev_close(eth_dev);
1304
1305         pci_dev = eth_dev->pci_dev;
1306
1307         eth_dev->dev_ops = NULL;
1308         eth_dev->tx_pkt_burst = NULL;
1309         eth_dev->rx_pkt_burst = NULL;
1310
1311         rte_free(eth_dev->data->mac_addrs);
1312         eth_dev->data->mac_addrs = NULL;
1313
1314         /* reset interrupt callback  */
1315         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1316                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1317                                                 virtio_interrupt_handler,
1318                                                 eth_dev);
1319         rte_eal_pci_unmap_device(pci_dev);
1320
1321         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1322
1323         return 0;
1324 }
1325
1326 static struct eth_driver rte_virtio_pmd = {
1327         .pci_drv = {
1328                 .driver = {
1329                         .name = "net_virtio",
1330                 },
1331                 .id_table = pci_id_virtio_map,
1332                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1333                 .probe = rte_eth_dev_pci_probe,
1334                 .remove = rte_eth_dev_pci_remove,
1335         },
1336         .eth_dev_init = eth_virtio_dev_init,
1337         .eth_dev_uninit = eth_virtio_dev_uninit,
1338         .dev_private_size = sizeof(struct virtio_hw),
1339 };
1340
1341 RTE_INIT(rte_virtio_pmd_init);
1342 static void
1343 rte_virtio_pmd_init(void)
1344 {
1345         if (rte_eal_iopl_init() != 0) {
1346                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1347                 return;
1348         }
1349
1350         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1351 }
1352
1353 /*
1354  * Configure virtio device
1355  * It returns 0 on success.
1356  */
1357 static int
1358 virtio_dev_configure(struct rte_eth_dev *dev)
1359 {
1360         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1361         struct virtio_hw *hw = dev->data->dev_private;
1362         int ret;
1363
1364         PMD_INIT_LOG(DEBUG, "configure");
1365
1366         if (rxmode->hw_ip_checksum) {
1367                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1368                 return -EINVAL;
1369         }
1370
1371         /* Setup and start control queue */
1372         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1373                 ret = virtio_dev_cq_queue_setup(dev,
1374                         hw->max_queue_pairs * 2,
1375                         SOCKET_ID_ANY);
1376                 if (ret < 0)
1377                         return ret;
1378                 virtio_dev_cq_start(dev);
1379         }
1380
1381         hw->vlan_strip = rxmode->hw_vlan_strip;
1382
1383         if (rxmode->hw_vlan_filter
1384             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1385                 PMD_DRV_LOG(NOTICE,
1386                             "vlan filtering not available on this host");
1387                 return -ENOTSUP;
1388         }
1389
1390         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1391                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1392                         PMD_DRV_LOG(ERR, "failed to set config vector");
1393                         return -EBUSY;
1394                 }
1395
1396         return 0;
1397 }
1398
1399
1400 static int
1401 virtio_dev_start(struct rte_eth_dev *dev)
1402 {
1403         uint16_t nb_queues, i;
1404         struct virtio_hw *hw = dev->data->dev_private;
1405         struct virtnet_rx *rxvq;
1406         struct virtnet_tx *txvq __rte_unused;
1407
1408         /* check if lsc interrupt feature is enabled */
1409         if (dev->data->dev_conf.intr_conf.lsc) {
1410                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1411                         PMD_DRV_LOG(ERR, "link status not supported by host");
1412                         return -ENOTSUP;
1413                 }
1414
1415                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1416                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1417                         return -EIO;
1418                 }
1419         }
1420
1421         /* Initialize Link state */
1422         virtio_dev_link_update(dev, 0);
1423
1424         /* On restart after stop do not touch queues */
1425         if (hw->started)
1426                 return 0;
1427
1428         /* Do final configuration before rx/tx engine starts */
1429         virtio_dev_rxtx_start(dev);
1430         vtpci_reinit_complete(hw);
1431
1432         hw->started = 1;
1433
1434         /*Notify the backend
1435          *Otherwise the tap backend might already stop its queue due to fullness.
1436          *vhost backend will have no chance to be waked up
1437          */
1438         nb_queues = dev->data->nb_rx_queues;
1439         if (nb_queues > 1) {
1440                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1441                         return -EINVAL;
1442         }
1443
1444         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1445
1446         for (i = 0; i < nb_queues; i++) {
1447                 rxvq = dev->data->rx_queues[i];
1448                 virtqueue_notify(rxvq->vq);
1449         }
1450
1451         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1452
1453         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1454                 rxvq = dev->data->rx_queues[i];
1455                 VIRTQUEUE_DUMP(rxvq->vq);
1456         }
1457
1458         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1459                 txvq = dev->data->tx_queues[i];
1460                 VIRTQUEUE_DUMP(txvq->vq);
1461         }
1462
1463         return 0;
1464 }
1465
1466 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1467 {
1468         struct rte_mbuf *buf;
1469         int i, mbuf_num = 0;
1470
1471         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1472                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1473
1474                 PMD_INIT_LOG(DEBUG,
1475                              "Before freeing rxq[%d] used and unused buf", i);
1476                 VIRTQUEUE_DUMP(rxvq->vq);
1477
1478                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1479                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1480                         rte_pktmbuf_free(buf);
1481                         mbuf_num++;
1482                 }
1483
1484                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1485                 PMD_INIT_LOG(DEBUG,
1486                              "After freeing rxq[%d] used and unused buf", i);
1487                 VIRTQUEUE_DUMP(rxvq->vq);
1488         }
1489
1490         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1491                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1492
1493                 PMD_INIT_LOG(DEBUG,
1494                              "Before freeing txq[%d] used and unused bufs",
1495                              i);
1496                 VIRTQUEUE_DUMP(txvq->vq);
1497
1498                 mbuf_num = 0;
1499                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1500                         rte_pktmbuf_free(buf);
1501                         mbuf_num++;
1502                 }
1503
1504                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1505                 PMD_INIT_LOG(DEBUG,
1506                              "After freeing txq[%d] used and unused buf", i);
1507                 VIRTQUEUE_DUMP(txvq->vq);
1508         }
1509 }
1510
1511 /*
1512  * Stop device: disable interrupt and mark link down
1513  */
1514 static void
1515 virtio_dev_stop(struct rte_eth_dev *dev)
1516 {
1517         struct rte_eth_link link;
1518         struct virtio_hw *hw = dev->data->dev_private;
1519
1520         PMD_INIT_LOG(DEBUG, "stop");
1521
1522         hw->started = 0;
1523
1524         if (dev->data->dev_conf.intr_conf.lsc)
1525                 rte_intr_disable(&dev->pci_dev->intr_handle);
1526
1527         memset(&link, 0, sizeof(link));
1528         virtio_dev_atomic_write_link_status(dev, &link);
1529 }
1530
1531 static int
1532 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1533 {
1534         struct rte_eth_link link, old;
1535         uint16_t status;
1536         struct virtio_hw *hw = dev->data->dev_private;
1537         memset(&link, 0, sizeof(link));
1538         virtio_dev_atomic_read_link_status(dev, &link);
1539         old = link;
1540         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1541         link.link_speed  = SPEED_10G;
1542
1543         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1544                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1545                 vtpci_read_dev_config(hw,
1546                                 offsetof(struct virtio_net_config, status),
1547                                 &status, sizeof(status));
1548                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1549                         link.link_status = ETH_LINK_DOWN;
1550                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1551                                      dev->data->port_id);
1552                 } else {
1553                         link.link_status = ETH_LINK_UP;
1554                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1555                                      dev->data->port_id);
1556                 }
1557         } else {
1558                 link.link_status = ETH_LINK_UP;
1559         }
1560         virtio_dev_atomic_write_link_status(dev, &link);
1561
1562         return (old.link_status == link.link_status) ? -1 : 0;
1563 }
1564
1565 static void
1566 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1567 {
1568         struct virtio_hw *hw = dev->data->dev_private;
1569
1570         if (dev->pci_dev)
1571                 dev_info->driver_name = dev->driver->pci_drv.driver.name;
1572         else
1573                 dev_info->driver_name = "virtio_user PMD";
1574         dev_info->max_rx_queues =
1575                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1576         dev_info->max_tx_queues =
1577                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1578         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1579         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1580         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1581         dev_info->default_txconf = (struct rte_eth_txconf) {
1582                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1583         };
1584 }
1585
1586 /*
1587  * It enables testpmd to collect per queue stats.
1588  */
1589 static int
1590 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1591 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1592 __rte_unused uint8_t is_rx)
1593 {
1594         return 0;
1595 }
1596
1597 DRIVER_EXPORT_NAME(net_virtio, __COUNTER__);
1598 DRIVER_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);