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