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_ethdev_pci.h>
  42 #include <rte_memcpy.h>
  43 #include <rte_string_fns.h>
  44 #include <rte_memzone.h>
  45 #include <rte_malloc.h>
  46 #include <rte_atomic.h>
  47 #include <rte_branch_prediction.h>
  48 #include <rte_pci.h>
  49 #include <rte_bus_pci.h>
  50 #include <rte_ether.h>
  51 #include <rte_common.h>
  52 #include <rte_errno.h>
  53 #include <rte_cpuflags.h>
  54
  55 #include <rte_memory.h>
  56 #include <rte_eal.h>
  57 #include <rte_dev.h>
  58
  59 #include "virtio_ethdev.h"
  60 #include "virtio_pci.h"
  61 #include "virtio_logs.h"
  62 #include "virtqueue.h"
  63 #include "virtio_rxtx.h"
  64
  65 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  66 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  67 static int  virtio_dev_start(struct rte_eth_dev *dev);
  68 static void virtio_dev_stop(struct rte_eth_dev *dev);
  69 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  70 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  71 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  72 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  73 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  74                                 struct rte_eth_dev_info *dev_info);
  75 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  76         int wait_to_complete);
  77 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  78
  79 static void virtio_set_hwaddr(struct virtio_hw *hw);
  80 static void virtio_get_hwaddr(struct virtio_hw *hw);
  81
  82 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  83                                  struct rte_eth_stats *stats);
  84 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  85                                  struct rte_eth_xstat *xstats, unsigned n);
  86 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  87                                        struct rte_eth_xstat_name *xstats_names,
  88                                        unsigned limit);
  89 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  90 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  91 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  92                                 uint16_t vlan_id, int on);
  93 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr,
  95                                 uint32_t index, uint32_t vmdq);
  96 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  97 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  98                                 struct ether_addr *mac_addr);
  99
 100 static int virtio_dev_queue_stats_mapping_set(
 101         struct rte_eth_dev *eth_dev,
 102         uint16_t queue_id,
 103         uint8_t stat_idx,
 104         uint8_t is_rx);
 105
 106 /*
 107  * The set of PCI devices this driver supports
 108  */
 109 static const struct rte_pci_id pci_id_virtio_map[] = {
 110         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 111         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 112         { .vendor_id = 0, /* sentinel */ },
 113 };
 114
 115 struct rte_virtio_xstats_name_off {
 116         char name[RTE_ETH_XSTATS_NAME_SIZE];
 117         unsigned offset;
 118 };
 119
 120 /* [rt]x_qX_ is prepended to the name string here */
 121 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 122         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 123         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 124         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 125         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 126         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 127         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 128         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 129         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 130         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 131         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 132         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 133         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 134         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 135 };
 136
 137 /* [rt]x_qX_ is prepended to the name string here */
 138 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 139         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 140         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 141         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 142         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 143         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 144         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 145         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 146         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 147         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 148         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 149         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 150         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 151         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 152 };
 153
 154 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 155                             sizeof(rte_virtio_rxq_stat_strings[0]))
 156 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 157                             sizeof(rte_virtio_txq_stat_strings[0]))
 158
 159 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 160
 161 static int
 162 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 163                 int *dlen, int pkt_num)
 164 {
 165         uint32_t head, i;
 166         int k, sum = 0;
 167         virtio_net_ctrl_ack status = ~0;
 168         struct virtio_pmd_ctrl *result;
 169         struct virtqueue *vq;
 170
 171         ctrl->status = status;
 172
 173         if (!cvq || !cvq->vq) {
 174                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 175                 return -1;
 176         }
 177         vq = cvq->vq;
 178         head = vq->vq_desc_head_idx;
 179
 180         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 181                 "vq->hw->cvq = %p vq = %p",
 182                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 183
 184         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 185                 return -1;
 186
 187         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 188                 sizeof(struct virtio_pmd_ctrl));
 189
 190         /*
 191          * Format is enforced in qemu code:
 192          * One TX packet for header;
 193          * At least one TX packet per argument;
 194          * One RX packet for ACK.
 195          */
 196         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 197         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 198         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 199         vq->vq_free_cnt--;
 200         i = vq->vq_ring.desc[head].next;
 201
 202         for (k = 0; k < pkt_num; k++) {
 203                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 204                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 205                         + sizeof(struct virtio_net_ctrl_hdr)
 206                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 207                 vq->vq_ring.desc[i].len = dlen[k];
 208                 sum += dlen[k];
 209                 vq->vq_free_cnt--;
 210                 i = vq->vq_ring.desc[i].next;
 211         }
 212
 213         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 214         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 215                         + sizeof(struct virtio_net_ctrl_hdr);
 216         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 217         vq->vq_free_cnt--;
 218
 219         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 220
 221         vq_update_avail_ring(vq, head);
 222         vq_update_avail_idx(vq);
 223
 224         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 225
 226         virtqueue_notify(vq);
 227
 228         rte_rmb();
 229         while (VIRTQUEUE_NUSED(vq) == 0) {
 230                 rte_rmb();
 231                 usleep(100);
 232         }
 233
 234         while (VIRTQUEUE_NUSED(vq)) {
 235                 uint32_t idx, desc_idx, used_idx;
 236                 struct vring_used_elem *uep;
 237
 238                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 239                                 & (vq->vq_nentries - 1));
 240                 uep = &vq->vq_ring.used->ring[used_idx];
 241                 idx = (uint32_t) uep->id;
 242                 desc_idx = idx;
 243
 244                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 245                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 246                         vq->vq_free_cnt++;
 247                 }
 248
 249                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 250                 vq->vq_desc_head_idx = idx;
 251
 252                 vq->vq_used_cons_idx++;
 253                 vq->vq_free_cnt++;
 254         }
 255
 256         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 257                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 258
 259         result = cvq->virtio_net_hdr_mz->addr;
 260
 261         return result->status;
 262 }
 263
 264 static int
 265 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 266 {
 267         struct virtio_hw *hw = dev->data->dev_private;
 268         struct virtio_pmd_ctrl ctrl;
 269         int dlen[1];
 270         int ret;
 271
 272         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 273         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 274         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 275
 276         dlen[0] = sizeof(uint16_t);
 277
 278         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 279         if (ret) {
 280                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 281                           "failed, this is too late now...");
 282                 return -EINVAL;
 283         }
 284
 285         return 0;
 286 }
 287
 288 static void
 289 virtio_dev_queue_release(void *queue __rte_unused)
 290 {
 291         /* do nothing */
 292 }
 293
 294 static int
 295 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 296 {
 297         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 298                 return VTNET_CQ;
 299         else if (vtpci_queue_idx % 2 == 0)
 300                 return VTNET_RQ;
 301         else
 302                 return VTNET_TQ;
 303 }
 304
 305 static uint16_t
 306 virtio_get_nr_vq(struct virtio_hw *hw)
 307 {
 308         uint16_t nr_vq = hw->max_queue_pairs * 2;
 309
 310         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 311                 nr_vq += 1;
 312
 313         return nr_vq;
 314 }
 315
 316 static void
 317 virtio_init_vring(struct virtqueue *vq)
 318 {
 319         int size = vq->vq_nentries;
 320         struct vring *vr = &vq->vq_ring;
 321         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 322
 323         PMD_INIT_FUNC_TRACE();
 324
 325         /*
 326          * Reinitialise since virtio port might have been stopped and restarted
 327          */
 328         memset(ring_mem, 0, vq->vq_ring_size);
 329         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 330         vq->vq_used_cons_idx = 0;
 331         vq->vq_desc_head_idx = 0;
 332         vq->vq_avail_idx = 0;
 333         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 334         vq->vq_free_cnt = vq->vq_nentries;
 335         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 336
 337         vring_desc_init(vr->desc, size);
 338
 339         /*
 340          * Disable device(host) interrupting guest
 341          */
 342         virtqueue_disable_intr(vq);
 343 }
 344
 345 static int
 346 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 347 {
 348         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 349         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 350         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 351         unsigned int vq_size, size;
 352         struct virtio_hw *hw = dev->data->dev_private;
 353         struct virtnet_rx *rxvq = NULL;
 354         struct virtnet_tx *txvq = NULL;
 355         struct virtnet_ctl *cvq = NULL;
 356         struct virtqueue *vq;
 357         size_t sz_hdr_mz = 0;
 358         void *sw_ring = NULL;
 359         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 360         int ret;
 361
 362         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 363
 364         /*
 365          * Read the virtqueue size from the Queue Size field
 366          * Always power of 2 and if 0 virtqueue does not exist
 367          */
 368         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 369         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 370         if (vq_size == 0) {
 371                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 372                 return -EINVAL;
 373         }
 374
 375         if (!rte_is_power_of_2(vq_size)) {
 376                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 377                 return -EINVAL;
 378         }
 379
 380         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 381                  dev->data->port_id, vtpci_queue_idx);
 382
 383         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 384                                 vq_size * sizeof(struct vq_desc_extra),
 385                                 RTE_CACHE_LINE_SIZE);
 386         if (queue_type == VTNET_TQ) {
 387                 /*
 388                  * For each xmit packet, allocate a virtio_net_hdr
 389                  * and indirect ring elements
 390                  */
 391                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 392         } else if (queue_type == VTNET_CQ) {
 393                 /* Allocate a page for control vq command, data and status */
 394                 sz_hdr_mz = PAGE_SIZE;
 395         }
 396
 397         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 398                                 SOCKET_ID_ANY);
 399         if (vq == NULL) {
 400                 PMD_INIT_LOG(ERR, "can not allocate vq");
 401                 return -ENOMEM;
 402         }
 403         hw->vqs[vtpci_queue_idx] = vq;
 404
 405         vq->hw = hw;
 406         vq->vq_queue_index = vtpci_queue_idx;
 407         vq->vq_nentries = vq_size;
 408
 409         /*
 410          * Reserve a memzone for vring elements
 411          */
 412         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 413         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 414         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 415                      size, vq->vq_ring_size);
 416
 417         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 418                                          SOCKET_ID_ANY,
 419                                          0, VIRTIO_PCI_VRING_ALIGN);
 420         if (mz == NULL) {
 421                 if (rte_errno == EEXIST)
 422                         mz = rte_memzone_lookup(vq_name);
 423                 if (mz == NULL) {
 424                         ret = -ENOMEM;
 425                         goto fail_q_alloc;
 426                 }
 427         }
 428
 429         memset(mz->addr, 0, mz->len);
 430
 431         vq->vq_ring_mem = mz->iova;
 432         vq->vq_ring_virt_mem = mz->addr;
 433         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 434                      (uint64_t)mz->iova);
 435         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 436                      (uint64_t)(uintptr_t)mz->addr);
 437
 438         virtio_init_vring(vq);
 439
 440         if (sz_hdr_mz) {
 441                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 442                          dev->data->port_id, vtpci_queue_idx);
 443                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 444                                                      SOCKET_ID_ANY, 0,
 445                                                      RTE_CACHE_LINE_SIZE);
 446                 if (hdr_mz == NULL) {
 447                         if (rte_errno == EEXIST)
 448                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 449                         if (hdr_mz == NULL) {
 450                                 ret = -ENOMEM;
 451                                 goto fail_q_alloc;
 452                         }
 453                 }
 454         }
 455
 456         if (queue_type == VTNET_RQ) {
 457                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 458                                sizeof(vq->sw_ring[0]);
 459
 460                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 461                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 462                 if (!sw_ring) {
 463                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 464                         ret = -ENOMEM;
 465                         goto fail_q_alloc;
 466                 }
 467
 468                 vq->sw_ring = sw_ring;
 469                 rxvq = &vq->rxq;
 470                 rxvq->vq = vq;
 471                 rxvq->port_id = dev->data->port_id;
 472                 rxvq->mz = mz;
 473         } else if (queue_type == VTNET_TQ) {
 474                 txvq = &vq->txq;
 475                 txvq->vq = vq;
 476                 txvq->port_id = dev->data->port_id;
 477                 txvq->mz = mz;
 478                 txvq->virtio_net_hdr_mz = hdr_mz;
 479                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 480         } else if (queue_type == VTNET_CQ) {
 481                 cvq = &vq->cq;
 482                 cvq->vq = vq;
 483                 cvq->mz = mz;
 484                 cvq->virtio_net_hdr_mz = hdr_mz;
 485                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 486                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 487
 488                 hw->cvq = cvq;
 489         }
 490
 491         /* For virtio_user case (that is when hw->dev is NULL), we use
 492          * virtual address. And we need properly set _offset_, please see
 493          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 494          */
 495         if (!hw->virtio_user_dev)
 496                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 497         else {
 498                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 499                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 500                 if (queue_type == VTNET_TQ)
 501                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 502                 else if (queue_type == VTNET_CQ)
 503                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 504         }
 505
 506         if (queue_type == VTNET_TQ) {
 507                 struct virtio_tx_region *txr;
 508                 unsigned int i;
 509
 510                 txr = hdr_mz->addr;
 511                 memset(txr, 0, vq_size * sizeof(*txr));
 512                 for (i = 0; i < vq_size; i++) {
 513                         struct vring_desc *start_dp = txr[i].tx_indir;
 514
 515                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 516
 517                         /* first indirect descriptor is always the tx header */
 518                         start_dp->addr = txvq->virtio_net_hdr_mem
 519                                 + i * sizeof(*txr)
 520                                 + offsetof(struct virtio_tx_region, tx_hdr);
 521
 522                         start_dp->len = hw->vtnet_hdr_size;
 523                         start_dp->flags = VRING_DESC_F_NEXT;
 524                 }
 525         }
 526
 527         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 528                 PMD_INIT_LOG(ERR, "setup_queue failed");
 529                 return -EINVAL;
 530         }
 531
 532         return 0;
 533
 534 fail_q_alloc:
 535         rte_free(sw_ring);
 536         rte_memzone_free(hdr_mz);
 537         rte_memzone_free(mz);
 538         rte_free(vq);
 539
 540         return ret;
 541 }
 542
 543 static void
 544 virtio_free_queues(struct virtio_hw *hw)
 545 {
 546         uint16_t nr_vq = virtio_get_nr_vq(hw);
 547         struct virtqueue *vq;
 548         int queue_type;
 549         uint16_t i;
 550
 551         if (hw->vqs == NULL)
 552                 return;
 553
 554         for (i = 0; i < nr_vq; i++) {
 555                 vq = hw->vqs[i];
 556                 if (!vq)
 557                         continue;
 558
 559                 queue_type = virtio_get_queue_type(hw, i);
 560                 if (queue_type == VTNET_RQ) {
 561                         rte_free(vq->sw_ring);
 562                         rte_memzone_free(vq->rxq.mz);
 563                 } else if (queue_type == VTNET_TQ) {
 564                         rte_memzone_free(vq->txq.mz);
 565                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 566                 } else {
 567                         rte_memzone_free(vq->cq.mz);
 568                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 569                 }
 570
 571                 rte_free(vq);
 572                 hw->vqs[i] = NULL;
 573         }
 574
 575         rte_free(hw->vqs);
 576         hw->vqs = NULL;
 577 }
 578
 579 static int
 580 virtio_alloc_queues(struct rte_eth_dev *dev)
 581 {
 582         struct virtio_hw *hw = dev->data->dev_private;
 583         uint16_t nr_vq = virtio_get_nr_vq(hw);
 584         uint16_t i;
 585         int ret;
 586
 587         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 588         if (!hw->vqs) {
 589                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 590                 return -ENOMEM;
 591         }
 592
 593         for (i = 0; i < nr_vq; i++) {
 594                 ret = virtio_init_queue(dev, i);
 595                 if (ret < 0) {
 596                         virtio_free_queues(hw);
 597                         return ret;
 598                 }
 599         }
 600
 601         return 0;
 602 }
 603
 604 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 605
 606 static void
 607 virtio_dev_close(struct rte_eth_dev *dev)
 608 {
 609         struct virtio_hw *hw = dev->data->dev_private;
 610         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 611
 612         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 613
 614         /* reset the NIC */
 615         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 616                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 617         if (intr_conf->rxq)
 618                 virtio_queues_unbind_intr(dev);
 619
 620         if (intr_conf->lsc || intr_conf->rxq) {
 621                 rte_intr_disable(dev->intr_handle);
 622                 rte_intr_efd_disable(dev->intr_handle);
 623                 rte_free(dev->intr_handle->intr_vec);
 624                 dev->intr_handle->intr_vec = NULL;
 625         }
 626
 627         vtpci_reset(hw);
 628         virtio_dev_free_mbufs(dev);
 629         virtio_free_queues(hw);
 630 }
 631
 632 static void
 633 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 634 {
 635         struct virtio_hw *hw = dev->data->dev_private;
 636         struct virtio_pmd_ctrl ctrl;
 637         int dlen[1];
 638         int ret;
 639
 640         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 641                 PMD_INIT_LOG(INFO, "host does not support rx control");
 642                 return;
 643         }
 644
 645         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 646         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 647         ctrl.data[0] = 1;
 648         dlen[0] = 1;
 649
 650         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 651         if (ret)
 652                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 653 }
 654
 655 static void
 656 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 657 {
 658         struct virtio_hw *hw = dev->data->dev_private;
 659         struct virtio_pmd_ctrl ctrl;
 660         int dlen[1];
 661         int ret;
 662
 663         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 664                 PMD_INIT_LOG(INFO, "host does not support rx control");
 665                 return;
 666         }
 667
 668         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 669         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 670         ctrl.data[0] = 0;
 671         dlen[0] = 1;
 672
 673         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 674         if (ret)
 675                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 676 }
 677
 678 static void
 679 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 680 {
 681         struct virtio_hw *hw = dev->data->dev_private;
 682         struct virtio_pmd_ctrl ctrl;
 683         int dlen[1];
 684         int ret;
 685
 686         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 687                 PMD_INIT_LOG(INFO, "host does not support rx control");
 688                 return;
 689         }
 690
 691         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 692         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 693         ctrl.data[0] = 1;
 694         dlen[0] = 1;
 695
 696         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 697         if (ret)
 698                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 699 }
 700
 701 static void
 702 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 703 {
 704         struct virtio_hw *hw = dev->data->dev_private;
 705         struct virtio_pmd_ctrl ctrl;
 706         int dlen[1];
 707         int ret;
 708
 709         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 710                 PMD_INIT_LOG(INFO, "host does not support rx control");
 711                 return;
 712         }
 713
 714         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 715         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 716         ctrl.data[0] = 0;
 717         dlen[0] = 1;
 718
 719         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 720         if (ret)
 721                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 722 }
 723
 724 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 725 static int
 726 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 727 {
 728         struct virtio_hw *hw = dev->data->dev_private;
 729         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 730                                  hw->vtnet_hdr_size;
 731         uint32_t frame_size = mtu + ether_hdr_len;
 732         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 733
 734         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 735
 736         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 737                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 738                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 739                 return -EINVAL;
 740         }
 741         return 0;
 742 }
 743
 744 static int
 745 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 746 {
 747         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 748         struct virtqueue *vq = rxvq->vq;
 749
 750         virtqueue_enable_intr(vq);
 751         return 0;
 752 }
 753
 754 static int
 755 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 756 {
 757         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 758         struct virtqueue *vq = rxvq->vq;
 759
 760         virtqueue_disable_intr(vq);
 761         return 0;
 762 }
 763
 764 /*
 765  * dev_ops for virtio, bare necessities for basic operation
 766  */
 767 static const struct eth_dev_ops virtio_eth_dev_ops = {
 768         .dev_configure           = virtio_dev_configure,
 769         .dev_start               = virtio_dev_start,
 770         .dev_stop                = virtio_dev_stop,
 771         .dev_close               = virtio_dev_close,
 772         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 773         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 774         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 775         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 776         .mtu_set                 = virtio_mtu_set,
 777         .dev_infos_get           = virtio_dev_info_get,
 778         .stats_get               = virtio_dev_stats_get,
 779         .xstats_get              = virtio_dev_xstats_get,
 780         .xstats_get_names        = virtio_dev_xstats_get_names,
 781         .stats_reset             = virtio_dev_stats_reset,
 782         .xstats_reset            = virtio_dev_stats_reset,
 783         .link_update             = virtio_dev_link_update,
 784         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 785         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 786         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 787         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 788         .rx_queue_release        = virtio_dev_queue_release,
 789         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 790         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 791         .tx_queue_release        = virtio_dev_queue_release,
 792         /* collect stats per queue */
 793         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 794         .vlan_filter_set         = virtio_vlan_filter_set,
 795         .mac_addr_add            = virtio_mac_addr_add,
 796         .mac_addr_remove         = virtio_mac_addr_remove,
 797         .mac_addr_set            = virtio_mac_addr_set,
 798 };
 799
 800 static inline int
 801 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 802                                 struct rte_eth_link *link)
 803 {
 804         struct rte_eth_link *dst = link;
 805         struct rte_eth_link *src = &(dev->data->dev_link);
 806
 807         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 808                         *(uint64_t *)src) == 0)
 809                 return -1;
 810
 811         return 0;
 812 }
 813
 814 /**
 815  * Atomically writes the link status information into global
 816  * structure rte_eth_dev.
 817  *
 818  * @param dev
 819  *   - Pointer to the structure rte_eth_dev to read from.
 820  *   - Pointer to the buffer to be saved with the link status.
 821  *
 822  * @return
 823  *   - On success, zero.
 824  *   - On failure, negative value.
 825  */
 826 static inline int
 827 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 828                 struct rte_eth_link *link)
 829 {
 830         struct rte_eth_link *dst = &(dev->data->dev_link);
 831         struct rte_eth_link *src = link;
 832
 833         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 834                                         *(uint64_t *)src) == 0)
 835                 return -1;
 836
 837         return 0;
 838 }
 839
 840 static void
 841 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 842 {
 843         unsigned i;
 844
 845         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 846                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 847                 if (txvq == NULL)
 848                         continue;
 849
 850                 stats->opackets += txvq->stats.packets;
 851                 stats->obytes += txvq->stats.bytes;
 852                 stats->oerrors += txvq->stats.errors;
 853
 854                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 855                         stats->q_opackets[i] = txvq->stats.packets;
 856                         stats->q_obytes[i] = txvq->stats.bytes;
 857                 }
 858         }
 859
 860         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 861                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 862                 if (rxvq == NULL)
 863                         continue;
 864
 865                 stats->ipackets += rxvq->stats.packets;
 866                 stats->ibytes += rxvq->stats.bytes;
 867                 stats->ierrors += rxvq->stats.errors;
 868
 869                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 870                         stats->q_ipackets[i] = rxvq->stats.packets;
 871                         stats->q_ibytes[i] = rxvq->stats.bytes;
 872                 }
 873         }
 874
 875         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 876 }
 877
 878 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 879                                        struct rte_eth_xstat_name *xstats_names,
 880                                        __rte_unused unsigned limit)
 881 {
 882         unsigned i;
 883         unsigned count = 0;
 884         unsigned t;
 885
 886         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 887                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 888
 889         if (xstats_names != NULL) {
 890                 /* Note: limit checked in rte_eth_xstats_names() */
 891
 892                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 893                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 894                         if (rxvq == NULL)
 895                                 continue;
 896                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 897                                 snprintf(xstats_names[count].name,
 898                                         sizeof(xstats_names[count].name),
 899                                         "rx_q%u_%s", i,
 900                                         rte_virtio_rxq_stat_strings[t].name);
 901                                 count++;
 902                         }
 903                 }
 904
 905                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 906                         struct virtqueue *txvq = dev->data->tx_queues[i];
 907                         if (txvq == NULL)
 908                                 continue;
 909                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 910                                 snprintf(xstats_names[count].name,
 911                                         sizeof(xstats_names[count].name),
 912                                         "tx_q%u_%s", i,
 913                                         rte_virtio_txq_stat_strings[t].name);
 914                                 count++;
 915                         }
 916                 }
 917                 return count;
 918         }
 919         return nstats;
 920 }
 921
 922 static int
 923 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 924                       unsigned n)
 925 {
 926         unsigned i;
 927         unsigned count = 0;
 928
 929         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 930                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 931
 932         if (n < nstats)
 933                 return nstats;
 934
 935         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 936                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 937
 938                 if (rxvq == NULL)
 939                         continue;
 940
 941                 unsigned t;
 942
 943                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 944                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 945                                 rte_virtio_rxq_stat_strings[t].offset);
 946                         xstats[count].id = count;
 947                         count++;
 948                 }
 949         }
 950
 951         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 952                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 953
 954                 if (txvq == NULL)
 955                         continue;
 956
 957                 unsigned t;
 958
 959                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 960                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 961                                 rte_virtio_txq_stat_strings[t].offset);
 962                         xstats[count].id = count;
 963                         count++;
 964                 }
 965         }
 966
 967         return count;
 968 }
 969
 970 static int
 971 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 972 {
 973         virtio_update_stats(dev, stats);
 974
 975         return 0;
 976 }
 977
 978 static void
 979 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 980 {
 981         unsigned int i;
 982
 983         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 984                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 985                 if (txvq == NULL)
 986                         continue;
 987
 988                 txvq->stats.packets = 0;
 989                 txvq->stats.bytes = 0;
 990                 txvq->stats.errors = 0;
 991                 txvq->stats.multicast = 0;
 992                 txvq->stats.broadcast = 0;
 993                 memset(txvq->stats.size_bins, 0,
 994                        sizeof(txvq->stats.size_bins[0]) * 8);
 995         }
 996
 997         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 998                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 999                 if (rxvq == NULL)
1000                         continue;
1001
1002                 rxvq->stats.packets = 0;
1003                 rxvq->stats.bytes = 0;
1004                 rxvq->stats.errors = 0;
1005                 rxvq->stats.multicast = 0;
1006                 rxvq->stats.broadcast = 0;
1007                 memset(rxvq->stats.size_bins, 0,
1008                        sizeof(rxvq->stats.size_bins[0]) * 8);
1009         }
1010 }
1011
1012 static void
1013 virtio_set_hwaddr(struct virtio_hw *hw)
1014 {
1015         vtpci_write_dev_config(hw,
1016                         offsetof(struct virtio_net_config, mac),
1017                         &hw->mac_addr, ETHER_ADDR_LEN);
1018 }
1019
1020 static void
1021 virtio_get_hwaddr(struct virtio_hw *hw)
1022 {
1023         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1024                 vtpci_read_dev_config(hw,
1025                         offsetof(struct virtio_net_config, mac),
1026                         &hw->mac_addr, ETHER_ADDR_LEN);
1027         } else {
1028                 eth_random_addr(&hw->mac_addr[0]);
1029                 virtio_set_hwaddr(hw);
1030         }
1031 }
1032
1033 static int
1034 virtio_mac_table_set(struct virtio_hw *hw,
1035                      const struct virtio_net_ctrl_mac *uc,
1036                      const struct virtio_net_ctrl_mac *mc)
1037 {
1038         struct virtio_pmd_ctrl ctrl;
1039         int err, len[2];
1040
1041         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1042                 PMD_DRV_LOG(INFO, "host does not support mac table");
1043                 return -1;
1044         }
1045
1046         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1047         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1048
1049         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1050         memcpy(ctrl.data, uc, len[0]);
1051
1052         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1053         memcpy(ctrl.data + len[0], mc, len[1]);
1054
1055         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1056         if (err != 0)
1057                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1058         return err;
1059 }
1060
1061 static int
1062 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1063                     uint32_t index, uint32_t vmdq __rte_unused)
1064 {
1065         struct virtio_hw *hw = dev->data->dev_private;
1066         const struct ether_addr *addrs = dev->data->mac_addrs;
1067         unsigned int i;
1068         struct virtio_net_ctrl_mac *uc, *mc;
1069
1070         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1071                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1072                 return -EINVAL;
1073         }
1074
1075         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1076         uc->entries = 0;
1077         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1078         mc->entries = 0;
1079
1080         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1081                 const struct ether_addr *addr
1082                         = (i == index) ? mac_addr : addrs + i;
1083                 struct virtio_net_ctrl_mac *tbl
1084                         = is_multicast_ether_addr(addr) ? mc : uc;
1085
1086                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1087         }
1088
1089         return virtio_mac_table_set(hw, uc, mc);
1090 }
1091
1092 static void
1093 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1094 {
1095         struct virtio_hw *hw = dev->data->dev_private;
1096         struct ether_addr *addrs = dev->data->mac_addrs;
1097         struct virtio_net_ctrl_mac *uc, *mc;
1098         unsigned int i;
1099
1100         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1101                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1102                 return;
1103         }
1104
1105         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1106         uc->entries = 0;
1107         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1108         mc->entries = 0;
1109
1110         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1111                 struct virtio_net_ctrl_mac *tbl;
1112
1113                 if (i == index || is_zero_ether_addr(addrs + i))
1114                         continue;
1115
1116                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1117                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1118         }
1119
1120         virtio_mac_table_set(hw, uc, mc);
1121 }
1122
1123 static void
1124 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1125 {
1126         struct virtio_hw *hw = dev->data->dev_private;
1127
1128         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1129
1130         /* Use atomic update if available */
1131         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1132                 struct virtio_pmd_ctrl ctrl;
1133                 int len = ETHER_ADDR_LEN;
1134
1135                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1136                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1137
1138                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1139                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1140         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1141                 virtio_set_hwaddr(hw);
1142 }
1143
1144 static int
1145 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1146 {
1147         struct virtio_hw *hw = dev->data->dev_private;
1148         struct virtio_pmd_ctrl ctrl;
1149         int len;
1150
1151         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1152                 return -ENOTSUP;
1153
1154         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1155         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1156         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1157         len = sizeof(vlan_id);
1158
1159         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1160 }
1161
1162 static int
1163 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1164 {
1165         uint64_t host_features;
1166
1167         /* Prepare guest_features: feature that driver wants to support */
1168         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1169                 req_features);
1170
1171         /* Read device(host) feature bits */
1172         host_features = VTPCI_OPS(hw)->get_features(hw);
1173         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1174                 host_features);
1175
1176         /* If supported, ensure MTU value is valid before acknowledging it. */
1177         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1178                 struct virtio_net_config config;
1179
1180                 vtpci_read_dev_config(hw,
1181                         offsetof(struct virtio_net_config, mtu),
1182                         &config.mtu, sizeof(config.mtu));
1183
1184                 if (config.mtu < ETHER_MIN_MTU)
1185                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1186         }
1187
1188         /*
1189          * Negotiate features: Subset of device feature bits are written back
1190          * guest feature bits.
1191          */
1192         hw->guest_features = req_features;
1193         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1194         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1195                 hw->guest_features);
1196
1197         if (hw->modern) {
1198                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1199                         PMD_INIT_LOG(ERR,
1200                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1201                         return -1;
1202                 }
1203                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1204                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1205                         PMD_INIT_LOG(ERR,
1206                                 "failed to set FEATURES_OK status!");
1207                         return -1;
1208                 }
1209         }
1210
1211         hw->req_guest_features = req_features;
1212
1213         return 0;
1214 }
1215
1216 /*
1217  * Process Virtio Config changed interrupt and call the callback
1218  * if link state changed.
1219  */
1220 void
1221 virtio_interrupt_handler(void *param)
1222 {
1223         struct rte_eth_dev *dev = param;
1224         struct virtio_hw *hw = dev->data->dev_private;
1225         uint8_t isr;
1226
1227         /* Read interrupt status which clears interrupt */
1228         isr = vtpci_isr(hw);
1229         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1230
1231         if (rte_intr_enable(dev->intr_handle) < 0)
1232                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1233
1234         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1235                 if (virtio_dev_link_update(dev, 0) == 0)
1236                         _rte_eth_dev_callback_process(dev,
1237                                                       RTE_ETH_EVENT_INTR_LSC,
1238                                                       NULL, NULL);
1239         }
1240
1241 }
1242
1243 /* set rx and tx handlers according to what is supported */
1244 static void
1245 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1246 {
1247         struct virtio_hw *hw = eth_dev->data->dev_private;
1248
1249         if (hw->use_simple_rx) {
1250                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1251                         eth_dev->data->port_id);
1252                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1253         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1254                 PMD_INIT_LOG(INFO,
1255                         "virtio: using mergeable buffer Rx path on port %u",
1256                         eth_dev->data->port_id);
1257                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1258         } else {
1259                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1260                         eth_dev->data->port_id);
1261                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1262         }
1263
1264         if (hw->use_simple_tx) {
1265                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1266                         eth_dev->data->port_id);
1267                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1268         } else {
1269                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1270                         eth_dev->data->port_id);
1271                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1272         }
1273 }
1274
1275 /* Only support 1:1 queue/interrupt mapping so far.
1276  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1277  * interrupt vectors (<N+1).
1278  */
1279 static int
1280 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1281 {
1282         uint32_t i;
1283         struct virtio_hw *hw = dev->data->dev_private;
1284
1285         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1286         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1287                 dev->intr_handle->intr_vec[i] = i + 1;
1288                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1289                                                  VIRTIO_MSI_NO_VECTOR) {
1290                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1291                         return -EBUSY;
1292                 }
1293         }
1294
1295         return 0;
1296 }
1297
1298 static void
1299 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1300 {
1301         uint32_t i;
1302         struct virtio_hw *hw = dev->data->dev_private;
1303
1304         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1305         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1306                 VTPCI_OPS(hw)->set_queue_irq(hw,
1307                                              hw->vqs[i * VTNET_CQ],
1308                                              VIRTIO_MSI_NO_VECTOR);
1309 }
1310
1311 static int
1312 virtio_configure_intr(struct rte_eth_dev *dev)
1313 {
1314         struct virtio_hw *hw = dev->data->dev_private;
1315
1316         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1317                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1318                 return -ENOTSUP;
1319         }
1320
1321         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1322                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1323                 return -1;
1324         }
1325
1326         if (!dev->intr_handle->intr_vec) {
1327                 dev->intr_handle->intr_vec =
1328                         rte_zmalloc("intr_vec",
1329                                     hw->max_queue_pairs * sizeof(int), 0);
1330                 if (!dev->intr_handle->intr_vec) {
1331                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1332                                      hw->max_queue_pairs);
1333                         return -ENOMEM;
1334                 }
1335         }
1336
1337         /* Re-register callback to update max_intr */
1338         rte_intr_callback_unregister(dev->intr_handle,
1339                                      virtio_interrupt_handler,
1340                                      dev);
1341         rte_intr_callback_register(dev->intr_handle,
1342                                    virtio_interrupt_handler,
1343                                    dev);
1344
1345         /* DO NOT try to remove this! This function will enable msix, or QEMU
1346          * will encounter SIGSEGV when DRIVER_OK is sent.
1347          * And for legacy devices, this should be done before queue/vec binding
1348          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1349          * (22) will be ignored.
1350          */
1351         if (rte_intr_enable(dev->intr_handle) < 0) {
1352                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1353                 return -1;
1354         }
1355
1356         if (virtio_queues_bind_intr(dev) < 0) {
1357                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1358                 return -1;
1359         }
1360
1361         return 0;
1362 }
1363
1364 /* reset device and renegotiate features if needed */
1365 static int
1366 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1367 {
1368         struct virtio_hw *hw = eth_dev->data->dev_private;
1369         struct virtio_net_config *config;
1370         struct virtio_net_config local_config;
1371         struct rte_pci_device *pci_dev = NULL;
1372         int ret;
1373
1374         /* Reset the device although not necessary at startup */
1375         vtpci_reset(hw);
1376
1377         /* Tell the host we've noticed this device. */
1378         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1379
1380         /* Tell the host we've known how to drive the device. */
1381         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1382         if (virtio_negotiate_features(hw, req_features) < 0)
1383                 return -1;
1384
1385         if (!hw->virtio_user_dev) {
1386                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1387                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1388         }
1389
1390         /* If host does not support both status and MSI-X then disable LSC */
1391         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1392                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1393         else
1394                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1395
1396         /* Setting up rx_header size for the device */
1397         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1398             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1399                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1400         else
1401                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1402
1403         /* Copy the permanent MAC address to: virtio_hw */
1404         virtio_get_hwaddr(hw);
1405         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1406                         &eth_dev->data->mac_addrs[0]);
1407         PMD_INIT_LOG(DEBUG,
1408                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1409                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1410                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1411
1412         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1413                 config = &local_config;
1414
1415                 vtpci_read_dev_config(hw,
1416                         offsetof(struct virtio_net_config, mac),
1417                         &config->mac, sizeof(config->mac));
1418
1419                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1420                         vtpci_read_dev_config(hw,
1421                                 offsetof(struct virtio_net_config, status),
1422                                 &config->status, sizeof(config->status));
1423                 } else {
1424                         PMD_INIT_LOG(DEBUG,
1425                                      "VIRTIO_NET_F_STATUS is not supported");
1426                         config->status = 0;
1427                 }
1428
1429                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1430                         vtpci_read_dev_config(hw,
1431                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1432                                 &config->max_virtqueue_pairs,
1433                                 sizeof(config->max_virtqueue_pairs));
1434                 } else {
1435                         PMD_INIT_LOG(DEBUG,
1436                                      "VIRTIO_NET_F_MQ is not supported");
1437                         config->max_virtqueue_pairs = 1;
1438                 }
1439
1440                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1441
1442                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1443                         vtpci_read_dev_config(hw,
1444                                 offsetof(struct virtio_net_config, mtu),
1445                                 &config->mtu,
1446                                 sizeof(config->mtu));
1447
1448                         /*
1449                          * MTU value has already been checked at negotiation
1450                          * time, but check again in case it has changed since
1451                          * then, which should not happen.
1452                          */
1453                         if (config->mtu < ETHER_MIN_MTU) {
1454                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1455                                                 config->mtu);
1456                                 return -1;
1457                         }
1458
1459                         hw->max_mtu = config->mtu;
1460                         /* Set initial MTU to maximum one supported by vhost */
1461                         eth_dev->data->mtu = config->mtu;
1462
1463                 } else {
1464                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1465                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1466                 }
1467
1468                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1469                                 config->max_virtqueue_pairs);
1470                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1471                 PMD_INIT_LOG(DEBUG,
1472                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1473                                 config->mac[0], config->mac[1],
1474                                 config->mac[2], config->mac[3],
1475                                 config->mac[4], config->mac[5]);
1476         } else {
1477                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1478                 hw->max_queue_pairs = 1;
1479         }
1480
1481         ret = virtio_alloc_queues(eth_dev);
1482         if (ret < 0)
1483                 return ret;
1484
1485         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1486                 if (virtio_configure_intr(eth_dev) < 0) {
1487                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1488                         return -1;
1489                 }
1490         }
1491
1492         vtpci_reinit_complete(hw);
1493
1494         if (pci_dev)
1495                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1496                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1497                         pci_dev->id.device_id);
1498
1499         return 0;
1500 }
1501
1502 /*
1503  * Remap the PCI device again (IO port map for legacy device and
1504  * memory map for modern device), so that the secondary process
1505  * could have the PCI initiated correctly.
1506  */
1507 static int
1508 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1509 {
1510         if (hw->modern) {
1511                 /*
1512                  * We don't have to re-parse the PCI config space, since
1513                  * rte_pci_map_device() makes sure the mapped address
1514                  * in secondary process would equal to the one mapped in
1515                  * the primary process: error will be returned if that
1516                  * requirement is not met.
1517                  *
1518                  * That said, we could simply reuse all cap pointers
1519                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1520                  * primary process, which is stored in shared memory.
1521                  */
1522                 if (rte_pci_map_device(pci_dev)) {
1523                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1524                         return -1;
1525                 }
1526         } else {
1527                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1528                         return -1;
1529         }
1530
1531         return 0;
1532 }
1533
1534 static void
1535 virtio_set_vtpci_ops(struct virtio_hw *hw)
1536 {
1537 #ifdef RTE_VIRTIO_USER
1538         if (hw->virtio_user_dev)
1539                 VTPCI_OPS(hw) = &virtio_user_ops;
1540         else
1541 #endif
1542         if (hw->modern)
1543                 VTPCI_OPS(hw) = &modern_ops;
1544         else
1545                 VTPCI_OPS(hw) = &legacy_ops;
1546 }
1547
1548 /*
1549  * This function is based on probe() function in virtio_pci.c
1550  * It returns 0 on success.
1551  */
1552 int
1553 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1554 {
1555         struct virtio_hw *hw = eth_dev->data->dev_private;
1556         int ret;
1557
1558         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1559
1560         eth_dev->dev_ops = &virtio_eth_dev_ops;
1561
1562         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1563                 if (!hw->virtio_user_dev) {
1564                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1565                         if (ret)
1566                                 return ret;
1567                 }
1568
1569                 virtio_set_vtpci_ops(hw);
1570                 set_rxtx_funcs(eth_dev);
1571
1572                 return 0;
1573         }
1574
1575         /* Allocate memory for storing MAC addresses */
1576         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1577         if (eth_dev->data->mac_addrs == NULL) {
1578                 PMD_INIT_LOG(ERR,
1579                         "Failed to allocate %d bytes needed to store MAC addresses",
1580                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1581                 return -ENOMEM;
1582         }
1583
1584         hw->port_id = eth_dev->data->port_id;
1585         /* For virtio_user case the hw->virtio_user_dev is populated by
1586          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1587          */
1588         if (!hw->virtio_user_dev) {
1589                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1590                 if (ret)
1591                         return ret;
1592         }
1593
1594         /* reset device and negotiate default features */
1595         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1596         if (ret < 0)
1597                 return ret;
1598
1599         /* Setup interrupt callback  */
1600         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1601                 rte_intr_callback_register(eth_dev->intr_handle,
1602                         virtio_interrupt_handler, eth_dev);
1603
1604         return 0;
1605 }
1606
1607 static int
1608 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1609 {
1610         PMD_INIT_FUNC_TRACE();
1611
1612         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1613                 return -EPERM;
1614
1615         virtio_dev_stop(eth_dev);
1616         virtio_dev_close(eth_dev);
1617
1618         eth_dev->dev_ops = NULL;
1619         eth_dev->tx_pkt_burst = NULL;
1620         eth_dev->rx_pkt_burst = NULL;
1621
1622         rte_free(eth_dev->data->mac_addrs);
1623         eth_dev->data->mac_addrs = NULL;
1624
1625         /* reset interrupt callback  */
1626         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1627                 rte_intr_callback_unregister(eth_dev->intr_handle,
1628                                                 virtio_interrupt_handler,
1629                                                 eth_dev);
1630         if (eth_dev->device)
1631                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1632
1633         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1634
1635         return 0;
1636 }
1637
1638 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1639         struct rte_pci_device *pci_dev)
1640 {
1641         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1642                 eth_virtio_dev_init);
1643 }
1644
1645 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1646 {
1647         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1648 }
1649
1650 static struct rte_pci_driver rte_virtio_pmd = {
1651         .driver = {
1652                 .name = "net_virtio",
1653         },
1654         .id_table = pci_id_virtio_map,
1655         .drv_flags = 0,
1656         .probe = eth_virtio_pci_probe,
1657         .remove = eth_virtio_pci_remove,
1658 };
1659
1660 RTE_INIT(rte_virtio_pmd_init);
1661 static void
1662 rte_virtio_pmd_init(void)
1663 {
1664         if (rte_eal_iopl_init() != 0) {
1665                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1666                 return;
1667         }
1668
1669         rte_pci_register(&rte_virtio_pmd);
1670 }
1671
1672 /*
1673  * Configure virtio device
1674  * It returns 0 on success.
1675  */
1676 static int
1677 virtio_dev_configure(struct rte_eth_dev *dev)
1678 {
1679         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1680         struct virtio_hw *hw = dev->data->dev_private;
1681         uint64_t req_features;
1682         int ret;
1683
1684         PMD_INIT_LOG(DEBUG, "configure");
1685         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1686
1687         if (dev->data->dev_conf.intr_conf.rxq) {
1688                 ret = virtio_init_device(dev, hw->req_guest_features);
1689                 if (ret < 0)
1690                         return ret;
1691         }
1692
1693         /* The name hw_ip_checksum is a bit confusing since it can be
1694          * set by the application to request L3 and/or L4 checksums. In
1695          * case of virtio, only L4 checksum is supported.
1696          */
1697         if (rxmode->hw_ip_checksum)
1698                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1699
1700         if (rxmode->enable_lro)
1701                 req_features |=
1702                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1703                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1704
1705         /* if request features changed, reinit the device */
1706         if (req_features != hw->req_guest_features) {
1707                 ret = virtio_init_device(dev, req_features);
1708                 if (ret < 0)
1709                         return ret;
1710         }
1711
1712         if (rxmode->hw_ip_checksum &&
1713                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1714                 PMD_DRV_LOG(ERR,
1715                         "rx checksum not available on this host");
1716                 return -ENOTSUP;
1717         }
1718
1719         if (rxmode->enable_lro &&
1720                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1721                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1722                 PMD_DRV_LOG(ERR,
1723                         "Large Receive Offload not available on this host");
1724                 return -ENOTSUP;
1725         }
1726
1727         /* start control queue */
1728         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1729                 virtio_dev_cq_start(dev);
1730
1731         hw->vlan_strip = rxmode->hw_vlan_strip;
1732
1733         if (rxmode->hw_vlan_filter
1734             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1735                 PMD_DRV_LOG(ERR,
1736                             "vlan filtering not available on this host");
1737                 return -ENOTSUP;
1738         }
1739
1740         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1741                 /* Enable vector (0) for Link State Intrerrupt */
1742                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1743                                 VIRTIO_MSI_NO_VECTOR) {
1744                         PMD_DRV_LOG(ERR, "failed to set config vector");
1745                         return -EBUSY;
1746                 }
1747
1748         hw->use_simple_rx = 1;
1749         hw->use_simple_tx = 1;
1750
1751 #if defined RTE_ARCH_ARM64 || defined CONFIG_RTE_ARCH_ARM
1752         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1753                 hw->use_simple_rx = 0;
1754                 hw->use_simple_tx = 0;
1755         }
1756 #endif
1757         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1758                 hw->use_simple_rx = 0;
1759                 hw->use_simple_tx = 0;
1760         }
1761
1762         if (rxmode->hw_ip_checksum)
1763                 hw->use_simple_rx = 0;
1764
1765         return 0;
1766 }
1767
1768
1769 static int
1770 virtio_dev_start(struct rte_eth_dev *dev)
1771 {
1772         uint16_t nb_queues, i;
1773         struct virtnet_rx *rxvq;
1774         struct virtnet_tx *txvq __rte_unused;
1775         struct virtio_hw *hw = dev->data->dev_private;
1776         int ret;
1777
1778         /* Finish the initialization of the queues */
1779         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1780                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1781                 if (ret < 0)
1782                         return ret;
1783         }
1784         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1785                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1786                 if (ret < 0)
1787                         return ret;
1788         }
1789
1790         /* check if lsc interrupt feature is enabled */
1791         if (dev->data->dev_conf.intr_conf.lsc) {
1792                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1793                         PMD_DRV_LOG(ERR, "link status not supported by host");
1794                         return -ENOTSUP;
1795                 }
1796         }
1797
1798         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1799          * in device configure, but it could be unmapped  when device is
1800          * stopped.
1801          */
1802         if (dev->data->dev_conf.intr_conf.lsc ||
1803             dev->data->dev_conf.intr_conf.rxq) {
1804                 rte_intr_disable(dev->intr_handle);
1805
1806                 if (rte_intr_enable(dev->intr_handle) < 0) {
1807                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1808                         return -EIO;
1809                 }
1810         }
1811
1812         /*Notify the backend
1813          *Otherwise the tap backend might already stop its queue due to fullness.
1814          *vhost backend will have no chance to be waked up
1815          */
1816         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1817         if (hw->max_queue_pairs > 1) {
1818                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1819                         return -EINVAL;
1820         }
1821
1822         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1823
1824         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1825                 rxvq = dev->data->rx_queues[i];
1826                 /* Flush the old packets */
1827                 virtqueue_flush(rxvq->vq);
1828                 virtqueue_notify(rxvq->vq);
1829         }
1830
1831         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1832                 txvq = dev->data->tx_queues[i];
1833                 virtqueue_notify(txvq->vq);
1834         }
1835
1836         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1837
1838         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1839                 rxvq = dev->data->rx_queues[i];
1840                 VIRTQUEUE_DUMP(rxvq->vq);
1841         }
1842
1843         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1844                 txvq = dev->data->tx_queues[i];
1845                 VIRTQUEUE_DUMP(txvq->vq);
1846         }
1847
1848         set_rxtx_funcs(dev);
1849         hw->started = 1;
1850
1851         /* Initialize Link state */
1852         virtio_dev_link_update(dev, 0);
1853
1854         return 0;
1855 }
1856
1857 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1858 {
1859         struct rte_mbuf *buf;
1860         int i, mbuf_num = 0;
1861
1862         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1863                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1864
1865                 PMD_INIT_LOG(DEBUG,
1866                              "Before freeing rxq[%d] used and unused buf", i);
1867                 VIRTQUEUE_DUMP(rxvq->vq);
1868
1869                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1870                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1871                         rte_pktmbuf_free(buf);
1872                         mbuf_num++;
1873                 }
1874
1875                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1876                 PMD_INIT_LOG(DEBUG,
1877                              "After freeing rxq[%d] used and unused buf", i);
1878                 VIRTQUEUE_DUMP(rxvq->vq);
1879         }
1880
1881         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1882                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1883
1884                 PMD_INIT_LOG(DEBUG,
1885                              "Before freeing txq[%d] used and unused bufs",
1886                              i);
1887                 VIRTQUEUE_DUMP(txvq->vq);
1888
1889                 mbuf_num = 0;
1890                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1891                         rte_pktmbuf_free(buf);
1892                         mbuf_num++;
1893                 }
1894
1895                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1896                 PMD_INIT_LOG(DEBUG,
1897                              "After freeing txq[%d] used and unused buf", i);
1898                 VIRTQUEUE_DUMP(txvq->vq);
1899         }
1900 }
1901
1902 /*
1903  * Stop device: disable interrupt and mark link down
1904  */
1905 static void
1906 virtio_dev_stop(struct rte_eth_dev *dev)
1907 {
1908         struct virtio_hw *hw = dev->data->dev_private;
1909         struct rte_eth_link link;
1910         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1911
1912         PMD_INIT_LOG(DEBUG, "stop");
1913
1914         if (intr_conf->lsc || intr_conf->rxq)
1915                 rte_intr_disable(dev->intr_handle);
1916
1917         hw->started = 0;
1918         memset(&link, 0, sizeof(link));
1919         virtio_dev_atomic_write_link_status(dev, &link);
1920 }
1921
1922 static int
1923 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1924 {
1925         struct rte_eth_link link, old;
1926         uint16_t status;
1927         struct virtio_hw *hw = dev->data->dev_private;
1928         memset(&link, 0, sizeof(link));
1929         virtio_dev_atomic_read_link_status(dev, &link);
1930         old = link;
1931         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1932         link.link_speed  = SPEED_10G;
1933
1934         if (hw->started == 0) {
1935                 link.link_status = ETH_LINK_DOWN;
1936         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1937                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1938                 vtpci_read_dev_config(hw,
1939                                 offsetof(struct virtio_net_config, status),
1940                                 &status, sizeof(status));
1941                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1942                         link.link_status = ETH_LINK_DOWN;
1943                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1944                                      dev->data->port_id);
1945                 } else {
1946                         link.link_status = ETH_LINK_UP;
1947                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1948                                      dev->data->port_id);
1949                 }
1950         } else {
1951                 link.link_status = ETH_LINK_UP;
1952         }
1953         virtio_dev_atomic_write_link_status(dev, &link);
1954
1955         return (old.link_status == link.link_status) ? -1 : 0;
1956 }
1957
1958 static int
1959 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1960 {
1961         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1962         struct virtio_hw *hw = dev->data->dev_private;
1963
1964         if (mask & ETH_VLAN_FILTER_MASK) {
1965                 if (rxmode->hw_vlan_filter &&
1966                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1967
1968                         PMD_DRV_LOG(NOTICE,
1969                                 "vlan filtering not available on this host");
1970
1971                         return -ENOTSUP;
1972                 }
1973         }
1974
1975         if (mask & ETH_VLAN_STRIP_MASK)
1976                 hw->vlan_strip = rxmode->hw_vlan_strip;
1977
1978         return 0;
1979 }
1980
1981 static void
1982 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1983 {
1984         uint64_t tso_mask, host_features;
1985         struct virtio_hw *hw = dev->data->dev_private;
1986
1987         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1988
1989         dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
1990         dev_info->max_rx_queues =
1991                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1992         dev_info->max_tx_queues =
1993                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1994         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1995         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1996         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1997         dev_info->default_txconf = (struct rte_eth_txconf) {
1998                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1999         };
2000
2001         host_features = VTPCI_OPS(hw)->get_features(hw);
2002         dev_info->rx_offload_capa = 0;
2003         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2004                 dev_info->rx_offload_capa |=
2005                         DEV_RX_OFFLOAD_TCP_CKSUM |
2006                         DEV_RX_OFFLOAD_UDP_CKSUM;
2007         }
2008         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2009                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2010         if ((host_features & tso_mask) == tso_mask)
2011                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2012
2013         dev_info->tx_offload_capa = 0;
2014         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2015                 dev_info->tx_offload_capa |=
2016                         DEV_TX_OFFLOAD_UDP_CKSUM |
2017                         DEV_TX_OFFLOAD_TCP_CKSUM;
2018         }
2019         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2020                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2021         if ((hw->guest_features & tso_mask) == tso_mask)
2022                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2023 }
2024
2025 /*
2026  * It enables testpmd to collect per queue stats.
2027  */
2028 static int
2029 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2030 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2031 __rte_unused uint8_t is_rx)
2032 {
2033         return 0;
2034 }
2035
2036 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2037 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2038 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");