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_intr_enable(struct rte_eth_dev *dev);
 101 static int virtio_intr_disable(struct rte_eth_dev *dev);
 102
 103 static int virtio_dev_queue_stats_mapping_set(
 104         struct rte_eth_dev *eth_dev,
 105         uint16_t queue_id,
 106         uint8_t stat_idx,
 107         uint8_t is_rx);
 108
 109 /*
 110  * The set of PCI devices this driver supports
 111  */
 112 static const struct rte_pci_id pci_id_virtio_map[] = {
 113         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 114         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 115         { .vendor_id = 0, /* sentinel */ },
 116 };
 117
 118 struct rte_virtio_xstats_name_off {
 119         char name[RTE_ETH_XSTATS_NAME_SIZE];
 120         unsigned offset;
 121 };
 122
 123 /* [rt]x_qX_ is prepended to the name string here */
 124 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 125         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 126         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 127         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 128         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 129         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 130         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 131         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 132         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 133         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 134         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 135         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 136         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 137         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 138 };
 139
 140 /* [rt]x_qX_ is prepended to the name string here */
 141 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 142         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 143         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 144         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 145         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 146         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 147         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 148         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 149         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 150         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 151         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 152         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 153         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 154         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 155 };
 156
 157 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 158                             sizeof(rte_virtio_rxq_stat_strings[0]))
 159 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 160                             sizeof(rte_virtio_txq_stat_strings[0]))
 161
 162 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 163
 164 static int
 165 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 166                 int *dlen, int pkt_num)
 167 {
 168         uint32_t head, i;
 169         int k, sum = 0;
 170         virtio_net_ctrl_ack status = ~0;
 171         struct virtio_pmd_ctrl *result;
 172         struct virtqueue *vq;
 173
 174         ctrl->status = status;
 175
 176         if (!cvq || !cvq->vq) {
 177                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 178                 return -1;
 179         }
 180         vq = cvq->vq;
 181         head = vq->vq_desc_head_idx;
 182
 183         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 184                 "vq->hw->cvq = %p vq = %p",
 185                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 186
 187         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 188                 return -1;
 189
 190         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 191                 sizeof(struct virtio_pmd_ctrl));
 192
 193         /*
 194          * Format is enforced in qemu code:
 195          * One TX packet for header;
 196          * At least one TX packet per argument;
 197          * One RX packet for ACK.
 198          */
 199         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 200         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 201         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 202         vq->vq_free_cnt--;
 203         i = vq->vq_ring.desc[head].next;
 204
 205         for (k = 0; k < pkt_num; k++) {
 206                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 207                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 208                         + sizeof(struct virtio_net_ctrl_hdr)
 209                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 210                 vq->vq_ring.desc[i].len = dlen[k];
 211                 sum += dlen[k];
 212                 vq->vq_free_cnt--;
 213                 i = vq->vq_ring.desc[i].next;
 214         }
 215
 216         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 217         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 218                         + sizeof(struct virtio_net_ctrl_hdr);
 219         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 220         vq->vq_free_cnt--;
 221
 222         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 223
 224         vq_update_avail_ring(vq, head);
 225         vq_update_avail_idx(vq);
 226
 227         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 228
 229         virtqueue_notify(vq);
 230
 231         rte_rmb();
 232         while (VIRTQUEUE_NUSED(vq) == 0) {
 233                 rte_rmb();
 234                 usleep(100);
 235         }
 236
 237         while (VIRTQUEUE_NUSED(vq)) {
 238                 uint32_t idx, desc_idx, used_idx;
 239                 struct vring_used_elem *uep;
 240
 241                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 242                                 & (vq->vq_nentries - 1));
 243                 uep = &vq->vq_ring.used->ring[used_idx];
 244                 idx = (uint32_t) uep->id;
 245                 desc_idx = idx;
 246
 247                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 248                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 249                         vq->vq_free_cnt++;
 250                 }
 251
 252                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 253                 vq->vq_desc_head_idx = idx;
 254
 255                 vq->vq_used_cons_idx++;
 256                 vq->vq_free_cnt++;
 257         }
 258
 259         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 260                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 261
 262         result = cvq->virtio_net_hdr_mz->addr;
 263
 264         return result->status;
 265 }
 266
 267 static int
 268 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 269 {
 270         struct virtio_hw *hw = dev->data->dev_private;
 271         struct virtio_pmd_ctrl ctrl;
 272         int dlen[1];
 273         int ret;
 274
 275         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 276         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 277         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 278
 279         dlen[0] = sizeof(uint16_t);
 280
 281         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 282         if (ret) {
 283                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 284                           "failed, this is too late now...");
 285                 return -EINVAL;
 286         }
 287
 288         return 0;
 289 }
 290
 291 static void
 292 virtio_dev_queue_release(void *queue __rte_unused)
 293 {
 294         /* do nothing */
 295 }
 296
 297 static uint16_t
 298 virtio_get_nr_vq(struct virtio_hw *hw)
 299 {
 300         uint16_t nr_vq = hw->max_queue_pairs * 2;
 301
 302         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 303                 nr_vq += 1;
 304
 305         return nr_vq;
 306 }
 307
 308 static void
 309 virtio_init_vring(struct virtqueue *vq)
 310 {
 311         int size = vq->vq_nentries;
 312         struct vring *vr = &vq->vq_ring;
 313         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 314
 315         PMD_INIT_FUNC_TRACE();
 316
 317         /*
 318          * Reinitialise since virtio port might have been stopped and restarted
 319          */
 320         memset(ring_mem, 0, vq->vq_ring_size);
 321         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 322         vq->vq_used_cons_idx = 0;
 323         vq->vq_desc_head_idx = 0;
 324         vq->vq_avail_idx = 0;
 325         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 326         vq->vq_free_cnt = vq->vq_nentries;
 327         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 328
 329         vring_desc_init(vr->desc, size);
 330
 331         /*
 332          * Disable device(host) interrupting guest
 333          */
 334         virtqueue_disable_intr(vq);
 335 }
 336
 337 static int
 338 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 339 {
 340         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 341         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 342         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 343         unsigned int vq_size, size;
 344         struct virtio_hw *hw = dev->data->dev_private;
 345         struct virtnet_rx *rxvq = NULL;
 346         struct virtnet_tx *txvq = NULL;
 347         struct virtnet_ctl *cvq = NULL;
 348         struct virtqueue *vq;
 349         size_t sz_hdr_mz = 0;
 350         void *sw_ring = NULL;
 351         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 352         int ret;
 353
 354         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 355
 356         /*
 357          * Read the virtqueue size from the Queue Size field
 358          * Always power of 2 and if 0 virtqueue does not exist
 359          */
 360         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 361         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 362         if (vq_size == 0) {
 363                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 364                 return -EINVAL;
 365         }
 366
 367         if (!rte_is_power_of_2(vq_size)) {
 368                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 369                 return -EINVAL;
 370         }
 371
 372         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 373                  dev->data->port_id, vtpci_queue_idx);
 374
 375         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 376                                 vq_size * sizeof(struct vq_desc_extra),
 377                                 RTE_CACHE_LINE_SIZE);
 378         if (queue_type == VTNET_TQ) {
 379                 /*
 380                  * For each xmit packet, allocate a virtio_net_hdr
 381                  * and indirect ring elements
 382                  */
 383                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 384         } else if (queue_type == VTNET_CQ) {
 385                 /* Allocate a page for control vq command, data and status */
 386                 sz_hdr_mz = PAGE_SIZE;
 387         }
 388
 389         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 390                                 SOCKET_ID_ANY);
 391         if (vq == NULL) {
 392                 PMD_INIT_LOG(ERR, "can not allocate vq");
 393                 return -ENOMEM;
 394         }
 395         hw->vqs[vtpci_queue_idx] = vq;
 396
 397         vq->hw = hw;
 398         vq->vq_queue_index = vtpci_queue_idx;
 399         vq->vq_nentries = vq_size;
 400
 401         /*
 402          * Reserve a memzone for vring elements
 403          */
 404         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 405         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 406         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 407                      size, vq->vq_ring_size);
 408
 409         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 410                                          SOCKET_ID_ANY,
 411                                          0, VIRTIO_PCI_VRING_ALIGN);
 412         if (mz == NULL) {
 413                 if (rte_errno == EEXIST)
 414                         mz = rte_memzone_lookup(vq_name);
 415                 if (mz == NULL) {
 416                         ret = -ENOMEM;
 417                         goto fail_q_alloc;
 418                 }
 419         }
 420
 421         memset(mz->addr, 0, mz->len);
 422
 423         vq->vq_ring_mem = mz->iova;
 424         vq->vq_ring_virt_mem = mz->addr;
 425         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 426                      (uint64_t)mz->iova);
 427         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 428                      (uint64_t)(uintptr_t)mz->addr);
 429
 430         virtio_init_vring(vq);
 431
 432         if (sz_hdr_mz) {
 433                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 434                          dev->data->port_id, vtpci_queue_idx);
 435                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 436                                                      SOCKET_ID_ANY, 0,
 437                                                      RTE_CACHE_LINE_SIZE);
 438                 if (hdr_mz == NULL) {
 439                         if (rte_errno == EEXIST)
 440                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 441                         if (hdr_mz == NULL) {
 442                                 ret = -ENOMEM;
 443                                 goto fail_q_alloc;
 444                         }
 445                 }
 446         }
 447
 448         if (queue_type == VTNET_RQ) {
 449                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 450                                sizeof(vq->sw_ring[0]);
 451
 452                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 453                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 454                 if (!sw_ring) {
 455                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 456                         ret = -ENOMEM;
 457                         goto fail_q_alloc;
 458                 }
 459
 460                 vq->sw_ring = sw_ring;
 461                 rxvq = &vq->rxq;
 462                 rxvq->vq = vq;
 463                 rxvq->port_id = dev->data->port_id;
 464                 rxvq->mz = mz;
 465         } else if (queue_type == VTNET_TQ) {
 466                 txvq = &vq->txq;
 467                 txvq->vq = vq;
 468                 txvq->port_id = dev->data->port_id;
 469                 txvq->mz = mz;
 470                 txvq->virtio_net_hdr_mz = hdr_mz;
 471                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 472         } else if (queue_type == VTNET_CQ) {
 473                 cvq = &vq->cq;
 474                 cvq->vq = vq;
 475                 cvq->mz = mz;
 476                 cvq->virtio_net_hdr_mz = hdr_mz;
 477                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 478                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 479
 480                 hw->cvq = cvq;
 481         }
 482
 483         /* For virtio_user case (that is when hw->dev is NULL), we use
 484          * virtual address. And we need properly set _offset_, please see
 485          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 486          */
 487         if (!hw->virtio_user_dev)
 488                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 489         else {
 490                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 491                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 492                 if (queue_type == VTNET_TQ)
 493                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 494                 else if (queue_type == VTNET_CQ)
 495                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 496         }
 497
 498         if (queue_type == VTNET_TQ) {
 499                 struct virtio_tx_region *txr;
 500                 unsigned int i;
 501
 502                 txr = hdr_mz->addr;
 503                 memset(txr, 0, vq_size * sizeof(*txr));
 504                 for (i = 0; i < vq_size; i++) {
 505                         struct vring_desc *start_dp = txr[i].tx_indir;
 506
 507                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 508
 509                         /* first indirect descriptor is always the tx header */
 510                         start_dp->addr = txvq->virtio_net_hdr_mem
 511                                 + i * sizeof(*txr)
 512                                 + offsetof(struct virtio_tx_region, tx_hdr);
 513
 514                         start_dp->len = hw->vtnet_hdr_size;
 515                         start_dp->flags = VRING_DESC_F_NEXT;
 516                 }
 517         }
 518
 519         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 520                 PMD_INIT_LOG(ERR, "setup_queue failed");
 521                 return -EINVAL;
 522         }
 523
 524         return 0;
 525
 526 fail_q_alloc:
 527         rte_free(sw_ring);
 528         rte_memzone_free(hdr_mz);
 529         rte_memzone_free(mz);
 530         rte_free(vq);
 531
 532         return ret;
 533 }
 534
 535 static void
 536 virtio_free_queues(struct virtio_hw *hw)
 537 {
 538         uint16_t nr_vq = virtio_get_nr_vq(hw);
 539         struct virtqueue *vq;
 540         int queue_type;
 541         uint16_t i;
 542
 543         if (hw->vqs == NULL)
 544                 return;
 545
 546         for (i = 0; i < nr_vq; i++) {
 547                 vq = hw->vqs[i];
 548                 if (!vq)
 549                         continue;
 550
 551                 queue_type = virtio_get_queue_type(hw, i);
 552                 if (queue_type == VTNET_RQ) {
 553                         rte_free(vq->sw_ring);
 554                         rte_memzone_free(vq->rxq.mz);
 555                 } else if (queue_type == VTNET_TQ) {
 556                         rte_memzone_free(vq->txq.mz);
 557                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 558                 } else {
 559                         rte_memzone_free(vq->cq.mz);
 560                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 561                 }
 562
 563                 rte_free(vq);
 564                 hw->vqs[i] = NULL;
 565         }
 566
 567         rte_free(hw->vqs);
 568         hw->vqs = NULL;
 569 }
 570
 571 static int
 572 virtio_alloc_queues(struct rte_eth_dev *dev)
 573 {
 574         struct virtio_hw *hw = dev->data->dev_private;
 575         uint16_t nr_vq = virtio_get_nr_vq(hw);
 576         uint16_t i;
 577         int ret;
 578
 579         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 580         if (!hw->vqs) {
 581                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 582                 return -ENOMEM;
 583         }
 584
 585         for (i = 0; i < nr_vq; i++) {
 586                 ret = virtio_init_queue(dev, i);
 587                 if (ret < 0) {
 588                         virtio_free_queues(hw);
 589                         return ret;
 590                 }
 591         }
 592
 593         return 0;
 594 }
 595
 596 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 597
 598 static void
 599 virtio_dev_close(struct rte_eth_dev *dev)
 600 {
 601         struct virtio_hw *hw = dev->data->dev_private;
 602         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 603
 604         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 605
 606         /* reset the NIC */
 607         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 608                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 609         if (intr_conf->rxq)
 610                 virtio_queues_unbind_intr(dev);
 611
 612         if (intr_conf->lsc || intr_conf->rxq) {
 613                 virtio_intr_disable(dev);
 614                 rte_intr_efd_disable(dev->intr_handle);
 615                 rte_free(dev->intr_handle->intr_vec);
 616                 dev->intr_handle->intr_vec = NULL;
 617         }
 618
 619         vtpci_reset(hw);
 620         virtio_dev_free_mbufs(dev);
 621         virtio_free_queues(hw);
 622 }
 623
 624 static void
 625 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 626 {
 627         struct virtio_hw *hw = dev->data->dev_private;
 628         struct virtio_pmd_ctrl ctrl;
 629         int dlen[1];
 630         int ret;
 631
 632         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 633                 PMD_INIT_LOG(INFO, "host does not support rx control");
 634                 return;
 635         }
 636
 637         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 638         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 639         ctrl.data[0] = 1;
 640         dlen[0] = 1;
 641
 642         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 643         if (ret)
 644                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 645 }
 646
 647 static void
 648 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 649 {
 650         struct virtio_hw *hw = dev->data->dev_private;
 651         struct virtio_pmd_ctrl ctrl;
 652         int dlen[1];
 653         int ret;
 654
 655         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 656                 PMD_INIT_LOG(INFO, "host does not support rx control");
 657                 return;
 658         }
 659
 660         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 661         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 662         ctrl.data[0] = 0;
 663         dlen[0] = 1;
 664
 665         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 666         if (ret)
 667                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 668 }
 669
 670 static void
 671 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 672 {
 673         struct virtio_hw *hw = dev->data->dev_private;
 674         struct virtio_pmd_ctrl ctrl;
 675         int dlen[1];
 676         int ret;
 677
 678         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 679                 PMD_INIT_LOG(INFO, "host does not support rx control");
 680                 return;
 681         }
 682
 683         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 684         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 685         ctrl.data[0] = 1;
 686         dlen[0] = 1;
 687
 688         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 689         if (ret)
 690                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 691 }
 692
 693 static void
 694 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 695 {
 696         struct virtio_hw *hw = dev->data->dev_private;
 697         struct virtio_pmd_ctrl ctrl;
 698         int dlen[1];
 699         int ret;
 700
 701         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 702                 PMD_INIT_LOG(INFO, "host does not support rx control");
 703                 return;
 704         }
 705
 706         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 707         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 708         ctrl.data[0] = 0;
 709         dlen[0] = 1;
 710
 711         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 712         if (ret)
 713                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 714 }
 715
 716 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 717 static int
 718 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 719 {
 720         struct virtio_hw *hw = dev->data->dev_private;
 721         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 722                                  hw->vtnet_hdr_size;
 723         uint32_t frame_size = mtu + ether_hdr_len;
 724         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 725
 726         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 727
 728         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 729                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 730                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 731                 return -EINVAL;
 732         }
 733         return 0;
 734 }
 735
 736 static int
 737 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 738 {
 739         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 740         struct virtqueue *vq = rxvq->vq;
 741
 742         virtqueue_enable_intr(vq);
 743         return 0;
 744 }
 745
 746 static int
 747 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 748 {
 749         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 750         struct virtqueue *vq = rxvq->vq;
 751
 752         virtqueue_disable_intr(vq);
 753         return 0;
 754 }
 755
 756 /*
 757  * dev_ops for virtio, bare necessities for basic operation
 758  */
 759 static const struct eth_dev_ops virtio_eth_dev_ops = {
 760         .dev_configure           = virtio_dev_configure,
 761         .dev_start               = virtio_dev_start,
 762         .dev_stop                = virtio_dev_stop,
 763         .dev_close               = virtio_dev_close,
 764         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 765         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 766         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 767         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 768         .mtu_set                 = virtio_mtu_set,
 769         .dev_infos_get           = virtio_dev_info_get,
 770         .stats_get               = virtio_dev_stats_get,
 771         .xstats_get              = virtio_dev_xstats_get,
 772         .xstats_get_names        = virtio_dev_xstats_get_names,
 773         .stats_reset             = virtio_dev_stats_reset,
 774         .xstats_reset            = virtio_dev_stats_reset,
 775         .link_update             = virtio_dev_link_update,
 776         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 777         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 778         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 779         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 780         .rx_queue_release        = virtio_dev_queue_release,
 781         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 782         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 783         .tx_queue_release        = virtio_dev_queue_release,
 784         /* collect stats per queue */
 785         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 786         .vlan_filter_set         = virtio_vlan_filter_set,
 787         .mac_addr_add            = virtio_mac_addr_add,
 788         .mac_addr_remove         = virtio_mac_addr_remove,
 789         .mac_addr_set            = virtio_mac_addr_set,
 790 };
 791
 792 static inline int
 793 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 794                                 struct rte_eth_link *link)
 795 {
 796         struct rte_eth_link *dst = link;
 797         struct rte_eth_link *src = &(dev->data->dev_link);
 798
 799         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 800                         *(uint64_t *)src) == 0)
 801                 return -1;
 802
 803         return 0;
 804 }
 805
 806 /**
 807  * Atomically writes the link status information into global
 808  * structure rte_eth_dev.
 809  *
 810  * @param dev
 811  *   - Pointer to the structure rte_eth_dev to read from.
 812  *   - Pointer to the buffer to be saved with the link status.
 813  *
 814  * @return
 815  *   - On success, zero.
 816  *   - On failure, negative value.
 817  */
 818 static inline int
 819 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 820                 struct rte_eth_link *link)
 821 {
 822         struct rte_eth_link *dst = &(dev->data->dev_link);
 823         struct rte_eth_link *src = link;
 824
 825         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 826                                         *(uint64_t *)src) == 0)
 827                 return -1;
 828
 829         return 0;
 830 }
 831
 832 static void
 833 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 834 {
 835         unsigned i;
 836
 837         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 838                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 839                 if (txvq == NULL)
 840                         continue;
 841
 842                 stats->opackets += txvq->stats.packets;
 843                 stats->obytes += txvq->stats.bytes;
 844                 stats->oerrors += txvq->stats.errors;
 845
 846                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 847                         stats->q_opackets[i] = txvq->stats.packets;
 848                         stats->q_obytes[i] = txvq->stats.bytes;
 849                 }
 850         }
 851
 852         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 853                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 854                 if (rxvq == NULL)
 855                         continue;
 856
 857                 stats->ipackets += rxvq->stats.packets;
 858                 stats->ibytes += rxvq->stats.bytes;
 859                 stats->ierrors += rxvq->stats.errors;
 860
 861                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 862                         stats->q_ipackets[i] = rxvq->stats.packets;
 863                         stats->q_ibytes[i] = rxvq->stats.bytes;
 864                 }
 865         }
 866
 867         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 868 }
 869
 870 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 871                                        struct rte_eth_xstat_name *xstats_names,
 872                                        __rte_unused unsigned limit)
 873 {
 874         unsigned i;
 875         unsigned count = 0;
 876         unsigned t;
 877
 878         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 879                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 880
 881         if (xstats_names != NULL) {
 882                 /* Note: limit checked in rte_eth_xstats_names() */
 883
 884                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 885                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 886                         if (rxvq == NULL)
 887                                 continue;
 888                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 889                                 snprintf(xstats_names[count].name,
 890                                         sizeof(xstats_names[count].name),
 891                                         "rx_q%u_%s", i,
 892                                         rte_virtio_rxq_stat_strings[t].name);
 893                                 count++;
 894                         }
 895                 }
 896
 897                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 898                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 899                         if (txvq == NULL)
 900                                 continue;
 901                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 902                                 snprintf(xstats_names[count].name,
 903                                         sizeof(xstats_names[count].name),
 904                                         "tx_q%u_%s", i,
 905                                         rte_virtio_txq_stat_strings[t].name);
 906                                 count++;
 907                         }
 908                 }
 909                 return count;
 910         }
 911         return nstats;
 912 }
 913
 914 static int
 915 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 916                       unsigned n)
 917 {
 918         unsigned i;
 919         unsigned count = 0;
 920
 921         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 922                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 923
 924         if (n < nstats)
 925                 return nstats;
 926
 927         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 928                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 929
 930                 if (rxvq == NULL)
 931                         continue;
 932
 933                 unsigned t;
 934
 935                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 936                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 937                                 rte_virtio_rxq_stat_strings[t].offset);
 938                         xstats[count].id = count;
 939                         count++;
 940                 }
 941         }
 942
 943         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 944                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 945
 946                 if (txvq == NULL)
 947                         continue;
 948
 949                 unsigned t;
 950
 951                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 952                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 953                                 rte_virtio_txq_stat_strings[t].offset);
 954                         xstats[count].id = count;
 955                         count++;
 956                 }
 957         }
 958
 959         return count;
 960 }
 961
 962 static int
 963 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 964 {
 965         virtio_update_stats(dev, stats);
 966
 967         return 0;
 968 }
 969
 970 static void
 971 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 972 {
 973         unsigned int i;
 974
 975         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 976                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 977                 if (txvq == NULL)
 978                         continue;
 979
 980                 txvq->stats.packets = 0;
 981                 txvq->stats.bytes = 0;
 982                 txvq->stats.errors = 0;
 983                 txvq->stats.multicast = 0;
 984                 txvq->stats.broadcast = 0;
 985                 memset(txvq->stats.size_bins, 0,
 986                        sizeof(txvq->stats.size_bins[0]) * 8);
 987         }
 988
 989         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 990                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 991                 if (rxvq == NULL)
 992                         continue;
 993
 994                 rxvq->stats.packets = 0;
 995                 rxvq->stats.bytes = 0;
 996                 rxvq->stats.errors = 0;
 997                 rxvq->stats.multicast = 0;
 998                 rxvq->stats.broadcast = 0;
 999                 memset(rxvq->stats.size_bins, 0,
1000                        sizeof(rxvq->stats.size_bins[0]) * 8);
1001         }
1002 }
1003
1004 static void
1005 virtio_set_hwaddr(struct virtio_hw *hw)
1006 {
1007         vtpci_write_dev_config(hw,
1008                         offsetof(struct virtio_net_config, mac),
1009                         &hw->mac_addr, ETHER_ADDR_LEN);
1010 }
1011
1012 static void
1013 virtio_get_hwaddr(struct virtio_hw *hw)
1014 {
1015         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1016                 vtpci_read_dev_config(hw,
1017                         offsetof(struct virtio_net_config, mac),
1018                         &hw->mac_addr, ETHER_ADDR_LEN);
1019         } else {
1020                 eth_random_addr(&hw->mac_addr[0]);
1021                 virtio_set_hwaddr(hw);
1022         }
1023 }
1024
1025 static int
1026 virtio_mac_table_set(struct virtio_hw *hw,
1027                      const struct virtio_net_ctrl_mac *uc,
1028                      const struct virtio_net_ctrl_mac *mc)
1029 {
1030         struct virtio_pmd_ctrl ctrl;
1031         int err, len[2];
1032
1033         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1034                 PMD_DRV_LOG(INFO, "host does not support mac table");
1035                 return -1;
1036         }
1037
1038         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1039         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1040
1041         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1042         memcpy(ctrl.data, uc, len[0]);
1043
1044         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1045         memcpy(ctrl.data + len[0], mc, len[1]);
1046
1047         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1048         if (err != 0)
1049                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1050         return err;
1051 }
1052
1053 static int
1054 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1055                     uint32_t index, uint32_t vmdq __rte_unused)
1056 {
1057         struct virtio_hw *hw = dev->data->dev_private;
1058         const struct ether_addr *addrs = dev->data->mac_addrs;
1059         unsigned int i;
1060         struct virtio_net_ctrl_mac *uc, *mc;
1061
1062         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1063                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1064                 return -EINVAL;
1065         }
1066
1067         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1068         uc->entries = 0;
1069         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1070         mc->entries = 0;
1071
1072         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1073                 const struct ether_addr *addr
1074                         = (i == index) ? mac_addr : addrs + i;
1075                 struct virtio_net_ctrl_mac *tbl
1076                         = is_multicast_ether_addr(addr) ? mc : uc;
1077
1078                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1079         }
1080
1081         return virtio_mac_table_set(hw, uc, mc);
1082 }
1083
1084 static void
1085 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1086 {
1087         struct virtio_hw *hw = dev->data->dev_private;
1088         struct ether_addr *addrs = dev->data->mac_addrs;
1089         struct virtio_net_ctrl_mac *uc, *mc;
1090         unsigned int i;
1091
1092         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1093                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1094                 return;
1095         }
1096
1097         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1098         uc->entries = 0;
1099         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1100         mc->entries = 0;
1101
1102         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1103                 struct virtio_net_ctrl_mac *tbl;
1104
1105                 if (i == index || is_zero_ether_addr(addrs + i))
1106                         continue;
1107
1108                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1109                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1110         }
1111
1112         virtio_mac_table_set(hw, uc, mc);
1113 }
1114
1115 static void
1116 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1117 {
1118         struct virtio_hw *hw = dev->data->dev_private;
1119
1120         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1121
1122         /* Use atomic update if available */
1123         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1124                 struct virtio_pmd_ctrl ctrl;
1125                 int len = ETHER_ADDR_LEN;
1126
1127                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1128                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1129
1130                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1131                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1132         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1133                 virtio_set_hwaddr(hw);
1134 }
1135
1136 static int
1137 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1138 {
1139         struct virtio_hw *hw = dev->data->dev_private;
1140         struct virtio_pmd_ctrl ctrl;
1141         int len;
1142
1143         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1144                 return -ENOTSUP;
1145
1146         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1147         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1148         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1149         len = sizeof(vlan_id);
1150
1151         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1152 }
1153
1154 static int
1155 virtio_intr_enable(struct rte_eth_dev *dev)
1156 {
1157         struct virtio_hw *hw = dev->data->dev_private;
1158
1159         if (rte_intr_enable(dev->intr_handle) < 0)
1160                 return -1;
1161
1162         if (!hw->virtio_user_dev)
1163                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1164
1165         return 0;
1166 }
1167
1168 static int
1169 virtio_intr_disable(struct rte_eth_dev *dev)
1170 {
1171         struct virtio_hw *hw = dev->data->dev_private;
1172
1173         if (rte_intr_disable(dev->intr_handle) < 0)
1174                 return -1;
1175
1176         if (!hw->virtio_user_dev)
1177                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1178
1179         return 0;
1180 }
1181
1182 static int
1183 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1184 {
1185         uint64_t host_features;
1186
1187         /* Prepare guest_features: feature that driver wants to support */
1188         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1189                 req_features);
1190
1191         /* Read device(host) feature bits */
1192         host_features = VTPCI_OPS(hw)->get_features(hw);
1193         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1194                 host_features);
1195
1196         /* If supported, ensure MTU value is valid before acknowledging it. */
1197         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1198                 struct virtio_net_config config;
1199
1200                 vtpci_read_dev_config(hw,
1201                         offsetof(struct virtio_net_config, mtu),
1202                         &config.mtu, sizeof(config.mtu));
1203
1204                 if (config.mtu < ETHER_MIN_MTU)
1205                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1206         }
1207
1208         /*
1209          * Negotiate features: Subset of device feature bits are written back
1210          * guest feature bits.
1211          */
1212         hw->guest_features = req_features;
1213         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1214         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1215                 hw->guest_features);
1216
1217         if (hw->modern) {
1218                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1219                         PMD_INIT_LOG(ERR,
1220                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1221                         return -1;
1222                 }
1223                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1224                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1225                         PMD_INIT_LOG(ERR,
1226                                 "failed to set FEATURES_OK status!");
1227                         return -1;
1228                 }
1229         }
1230
1231         hw->req_guest_features = req_features;
1232
1233         return 0;
1234 }
1235
1236 /*
1237  * Process Virtio Config changed interrupt and call the callback
1238  * if link state changed.
1239  */
1240 void
1241 virtio_interrupt_handler(void *param)
1242 {
1243         struct rte_eth_dev *dev = param;
1244         struct virtio_hw *hw = dev->data->dev_private;
1245         uint8_t isr;
1246
1247         /* Read interrupt status which clears interrupt */
1248         isr = vtpci_isr(hw);
1249         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1250
1251         if (virtio_intr_enable(dev) < 0)
1252                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1253
1254         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1255                 if (virtio_dev_link_update(dev, 0) == 0)
1256                         _rte_eth_dev_callback_process(dev,
1257                                                       RTE_ETH_EVENT_INTR_LSC,
1258                                                       NULL, NULL);
1259         }
1260
1261 }
1262
1263 /* set rx and tx handlers according to what is supported */
1264 static void
1265 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1266 {
1267         struct virtio_hw *hw = eth_dev->data->dev_private;
1268
1269         if (hw->use_simple_rx) {
1270                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1271                         eth_dev->data->port_id);
1272                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1273         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1274                 PMD_INIT_LOG(INFO,
1275                         "virtio: using mergeable buffer Rx path on port %u",
1276                         eth_dev->data->port_id);
1277                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1278         } else {
1279                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1280                         eth_dev->data->port_id);
1281                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1282         }
1283
1284         if (hw->use_simple_tx) {
1285                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1286                         eth_dev->data->port_id);
1287                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1288         } else {
1289                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1290                         eth_dev->data->port_id);
1291                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1292         }
1293 }
1294
1295 /* Only support 1:1 queue/interrupt mapping so far.
1296  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1297  * interrupt vectors (<N+1).
1298  */
1299 static int
1300 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1301 {
1302         uint32_t i;
1303         struct virtio_hw *hw = dev->data->dev_private;
1304
1305         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1306         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1307                 dev->intr_handle->intr_vec[i] = i + 1;
1308                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1309                                                  VIRTIO_MSI_NO_VECTOR) {
1310                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1311                         return -EBUSY;
1312                 }
1313         }
1314
1315         return 0;
1316 }
1317
1318 static void
1319 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1320 {
1321         uint32_t i;
1322         struct virtio_hw *hw = dev->data->dev_private;
1323
1324         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1325         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1326                 VTPCI_OPS(hw)->set_queue_irq(hw,
1327                                              hw->vqs[i * VTNET_CQ],
1328                                              VIRTIO_MSI_NO_VECTOR);
1329 }
1330
1331 static int
1332 virtio_configure_intr(struct rte_eth_dev *dev)
1333 {
1334         struct virtio_hw *hw = dev->data->dev_private;
1335
1336         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1337                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1338                 return -ENOTSUP;
1339         }
1340
1341         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1342                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1343                 return -1;
1344         }
1345
1346         if (!dev->intr_handle->intr_vec) {
1347                 dev->intr_handle->intr_vec =
1348                         rte_zmalloc("intr_vec",
1349                                     hw->max_queue_pairs * sizeof(int), 0);
1350                 if (!dev->intr_handle->intr_vec) {
1351                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1352                                      hw->max_queue_pairs);
1353                         return -ENOMEM;
1354                 }
1355         }
1356
1357         /* Re-register callback to update max_intr */
1358         rte_intr_callback_unregister(dev->intr_handle,
1359                                      virtio_interrupt_handler,
1360                                      dev);
1361         rte_intr_callback_register(dev->intr_handle,
1362                                    virtio_interrupt_handler,
1363                                    dev);
1364
1365         /* DO NOT try to remove this! This function will enable msix, or QEMU
1366          * will encounter SIGSEGV when DRIVER_OK is sent.
1367          * And for legacy devices, this should be done before queue/vec binding
1368          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1369          * (22) will be ignored.
1370          */
1371         if (virtio_intr_enable(dev) < 0) {
1372                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1373                 return -1;
1374         }
1375
1376         if (virtio_queues_bind_intr(dev) < 0) {
1377                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1378                 return -1;
1379         }
1380
1381         return 0;
1382 }
1383
1384 /* reset device and renegotiate features if needed */
1385 static int
1386 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1387 {
1388         struct virtio_hw *hw = eth_dev->data->dev_private;
1389         struct virtio_net_config *config;
1390         struct virtio_net_config local_config;
1391         struct rte_pci_device *pci_dev = NULL;
1392         int ret;
1393
1394         /* Reset the device although not necessary at startup */
1395         vtpci_reset(hw);
1396
1397         if (hw->vqs) {
1398                 virtio_dev_free_mbufs(eth_dev);
1399                 virtio_free_queues(hw);
1400         }
1401
1402         /* Tell the host we've noticed this device. */
1403         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1404
1405         /* Tell the host we've known how to drive the device. */
1406         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1407         if (virtio_negotiate_features(hw, req_features) < 0)
1408                 return -1;
1409
1410         if (!hw->virtio_user_dev) {
1411                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1412                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1413         }
1414
1415         /* If host does not support both status and MSI-X then disable LSC */
1416         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1417             hw->use_msix != VIRTIO_MSIX_NONE)
1418                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1419         else
1420                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1421
1422         /* Setting up rx_header size for the device */
1423         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1424             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1425                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1426         else
1427                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1428
1429         /* Copy the permanent MAC address to: virtio_hw */
1430         virtio_get_hwaddr(hw);
1431         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1432                         &eth_dev->data->mac_addrs[0]);
1433         PMD_INIT_LOG(DEBUG,
1434                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1435                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1436                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1437
1438         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1439                 config = &local_config;
1440
1441                 vtpci_read_dev_config(hw,
1442                         offsetof(struct virtio_net_config, mac),
1443                         &config->mac, sizeof(config->mac));
1444
1445                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1446                         vtpci_read_dev_config(hw,
1447                                 offsetof(struct virtio_net_config, status),
1448                                 &config->status, sizeof(config->status));
1449                 } else {
1450                         PMD_INIT_LOG(DEBUG,
1451                                      "VIRTIO_NET_F_STATUS is not supported");
1452                         config->status = 0;
1453                 }
1454
1455                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1456                         vtpci_read_dev_config(hw,
1457                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1458                                 &config->max_virtqueue_pairs,
1459                                 sizeof(config->max_virtqueue_pairs));
1460                 } else {
1461                         PMD_INIT_LOG(DEBUG,
1462                                      "VIRTIO_NET_F_MQ is not supported");
1463                         config->max_virtqueue_pairs = 1;
1464                 }
1465
1466                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1467
1468                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1469                         vtpci_read_dev_config(hw,
1470                                 offsetof(struct virtio_net_config, mtu),
1471                                 &config->mtu,
1472                                 sizeof(config->mtu));
1473
1474                         /*
1475                          * MTU value has already been checked at negotiation
1476                          * time, but check again in case it has changed since
1477                          * then, which should not happen.
1478                          */
1479                         if (config->mtu < ETHER_MIN_MTU) {
1480                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1481                                                 config->mtu);
1482                                 return -1;
1483                         }
1484
1485                         hw->max_mtu = config->mtu;
1486                         /* Set initial MTU to maximum one supported by vhost */
1487                         eth_dev->data->mtu = config->mtu;
1488
1489                 } else {
1490                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1491                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1492                 }
1493
1494                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1495                                 config->max_virtqueue_pairs);
1496                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1497                 PMD_INIT_LOG(DEBUG,
1498                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1499                                 config->mac[0], config->mac[1],
1500                                 config->mac[2], config->mac[3],
1501                                 config->mac[4], config->mac[5]);
1502         } else {
1503                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1504                 hw->max_queue_pairs = 1;
1505         }
1506
1507         ret = virtio_alloc_queues(eth_dev);
1508         if (ret < 0)
1509                 return ret;
1510
1511         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1512                 if (virtio_configure_intr(eth_dev) < 0) {
1513                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1514                         return -1;
1515                 }
1516         }
1517
1518         vtpci_reinit_complete(hw);
1519
1520         if (pci_dev)
1521                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1522                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1523                         pci_dev->id.device_id);
1524
1525         return 0;
1526 }
1527
1528 /*
1529  * Remap the PCI device again (IO port map for legacy device and
1530  * memory map for modern device), so that the secondary process
1531  * could have the PCI initiated correctly.
1532  */
1533 static int
1534 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1535 {
1536         if (hw->modern) {
1537                 /*
1538                  * We don't have to re-parse the PCI config space, since
1539                  * rte_pci_map_device() makes sure the mapped address
1540                  * in secondary process would equal to the one mapped in
1541                  * the primary process: error will be returned if that
1542                  * requirement is not met.
1543                  *
1544                  * That said, we could simply reuse all cap pointers
1545                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1546                  * primary process, which is stored in shared memory.
1547                  */
1548                 if (rte_pci_map_device(pci_dev)) {
1549                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1550                         return -1;
1551                 }
1552         } else {
1553                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1554                         return -1;
1555         }
1556
1557         return 0;
1558 }
1559
1560 static void
1561 virtio_set_vtpci_ops(struct virtio_hw *hw)
1562 {
1563 #ifdef RTE_VIRTIO_USER
1564         if (hw->virtio_user_dev)
1565                 VTPCI_OPS(hw) = &virtio_user_ops;
1566         else
1567 #endif
1568         if (hw->modern)
1569                 VTPCI_OPS(hw) = &modern_ops;
1570         else
1571                 VTPCI_OPS(hw) = &legacy_ops;
1572 }
1573
1574 /*
1575  * This function is based on probe() function in virtio_pci.c
1576  * It returns 0 on success.
1577  */
1578 int
1579 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1580 {
1581         struct virtio_hw *hw = eth_dev->data->dev_private;
1582         int ret;
1583
1584         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1585
1586         eth_dev->dev_ops = &virtio_eth_dev_ops;
1587
1588         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1589                 if (!hw->virtio_user_dev) {
1590                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1591                         if (ret)
1592                                 return ret;
1593                 }
1594
1595                 virtio_set_vtpci_ops(hw);
1596                 set_rxtx_funcs(eth_dev);
1597
1598                 return 0;
1599         }
1600
1601         /* Allocate memory for storing MAC addresses */
1602         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1603         if (eth_dev->data->mac_addrs == NULL) {
1604                 PMD_INIT_LOG(ERR,
1605                         "Failed to allocate %d bytes needed to store MAC addresses",
1606                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1607                 return -ENOMEM;
1608         }
1609
1610         hw->port_id = eth_dev->data->port_id;
1611         /* For virtio_user case the hw->virtio_user_dev is populated by
1612          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1613          */
1614         if (!hw->virtio_user_dev) {
1615                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1616                 if (ret)
1617                         goto out;
1618         }
1619
1620         /* reset device and negotiate default features */
1621         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1622         if (ret < 0)
1623                 goto out;
1624
1625         /* Setup interrupt callback  */
1626         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1627                 rte_intr_callback_register(eth_dev->intr_handle,
1628                         virtio_interrupt_handler, eth_dev);
1629
1630         return 0;
1631
1632 out:
1633         rte_free(eth_dev->data->mac_addrs);
1634         return ret;
1635 }
1636
1637 static int
1638 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1639 {
1640         PMD_INIT_FUNC_TRACE();
1641
1642         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1643                 return -EPERM;
1644
1645         virtio_dev_stop(eth_dev);
1646         virtio_dev_close(eth_dev);
1647
1648         eth_dev->dev_ops = NULL;
1649         eth_dev->tx_pkt_burst = NULL;
1650         eth_dev->rx_pkt_burst = NULL;
1651
1652         rte_free(eth_dev->data->mac_addrs);
1653         eth_dev->data->mac_addrs = NULL;
1654
1655         /* reset interrupt callback  */
1656         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1657                 rte_intr_callback_unregister(eth_dev->intr_handle,
1658                                                 virtio_interrupt_handler,
1659                                                 eth_dev);
1660         if (eth_dev->device)
1661                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1662
1663         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1664
1665         return 0;
1666 }
1667
1668 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1669         struct rte_pci_device *pci_dev)
1670 {
1671         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1672                 eth_virtio_dev_init);
1673 }
1674
1675 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1676 {
1677         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1678 }
1679
1680 static struct rte_pci_driver rte_virtio_pmd = {
1681         .driver = {
1682                 .name = "net_virtio",
1683         },
1684         .id_table = pci_id_virtio_map,
1685         .drv_flags = 0,
1686         .probe = eth_virtio_pci_probe,
1687         .remove = eth_virtio_pci_remove,
1688 };
1689
1690 RTE_INIT(rte_virtio_pmd_init);
1691 static void
1692 rte_virtio_pmd_init(void)
1693 {
1694         if (rte_eal_iopl_init() != 0) {
1695                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1696                 return;
1697         }
1698
1699         rte_pci_register(&rte_virtio_pmd);
1700 }
1701
1702 /*
1703  * Configure virtio device
1704  * It returns 0 on success.
1705  */
1706 static int
1707 virtio_dev_configure(struct rte_eth_dev *dev)
1708 {
1709         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1710         struct virtio_hw *hw = dev->data->dev_private;
1711         uint64_t req_features;
1712         int ret;
1713
1714         PMD_INIT_LOG(DEBUG, "configure");
1715         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1716
1717         if (dev->data->dev_conf.intr_conf.rxq) {
1718                 ret = virtio_init_device(dev, hw->req_guest_features);
1719                 if (ret < 0)
1720                         return ret;
1721         }
1722
1723         /* The name hw_ip_checksum is a bit confusing since it can be
1724          * set by the application to request L3 and/or L4 checksums. In
1725          * case of virtio, only L4 checksum is supported.
1726          */
1727         if (rxmode->hw_ip_checksum)
1728                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1729
1730         if (rxmode->enable_lro)
1731                 req_features |=
1732                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1733                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1734
1735         /* if request features changed, reinit the device */
1736         if (req_features != hw->req_guest_features) {
1737                 ret = virtio_init_device(dev, req_features);
1738                 if (ret < 0)
1739                         return ret;
1740         }
1741
1742         if (rxmode->hw_ip_checksum &&
1743                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1744                 PMD_DRV_LOG(ERR,
1745                         "rx checksum not available on this host");
1746                 return -ENOTSUP;
1747         }
1748
1749         if (rxmode->enable_lro &&
1750                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1751                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1752                 PMD_DRV_LOG(ERR,
1753                         "Large Receive Offload not available on this host");
1754                 return -ENOTSUP;
1755         }
1756
1757         /* start control queue */
1758         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1759                 virtio_dev_cq_start(dev);
1760
1761         hw->vlan_strip = rxmode->hw_vlan_strip;
1762
1763         if (rxmode->hw_vlan_filter
1764             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1765                 PMD_DRV_LOG(ERR,
1766                             "vlan filtering not available on this host");
1767                 return -ENOTSUP;
1768         }
1769
1770         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1771                 /* Enable vector (0) for Link State Intrerrupt */
1772                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1773                                 VIRTIO_MSI_NO_VECTOR) {
1774                         PMD_DRV_LOG(ERR, "failed to set config vector");
1775                         return -EBUSY;
1776                 }
1777
1778         hw->use_simple_rx = 1;
1779         hw->use_simple_tx = 1;
1780
1781 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1782         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1783                 hw->use_simple_rx = 0;
1784                 hw->use_simple_tx = 0;
1785         }
1786 #endif
1787         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1788                 hw->use_simple_rx = 0;
1789                 hw->use_simple_tx = 0;
1790         }
1791
1792         if (rxmode->hw_ip_checksum)
1793                 hw->use_simple_rx = 0;
1794
1795         return 0;
1796 }
1797
1798
1799 static int
1800 virtio_dev_start(struct rte_eth_dev *dev)
1801 {
1802         uint16_t nb_queues, i;
1803         struct virtnet_rx *rxvq;
1804         struct virtnet_tx *txvq __rte_unused;
1805         struct virtio_hw *hw = dev->data->dev_private;
1806         int ret;
1807
1808         /* Finish the initialization of the queues */
1809         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1810                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1811                 if (ret < 0)
1812                         return ret;
1813         }
1814         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1815                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1816                 if (ret < 0)
1817                         return ret;
1818         }
1819
1820         /* check if lsc interrupt feature is enabled */
1821         if (dev->data->dev_conf.intr_conf.lsc) {
1822                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1823                         PMD_DRV_LOG(ERR, "link status not supported by host");
1824                         return -ENOTSUP;
1825                 }
1826         }
1827
1828         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1829          * in device configure, but it could be unmapped  when device is
1830          * stopped.
1831          */
1832         if (dev->data->dev_conf.intr_conf.lsc ||
1833             dev->data->dev_conf.intr_conf.rxq) {
1834                 virtio_intr_disable(dev);
1835
1836                 if (virtio_intr_enable(dev) < 0) {
1837                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1838                         return -EIO;
1839                 }
1840         }
1841
1842         /*Notify the backend
1843          *Otherwise the tap backend might already stop its queue due to fullness.
1844          *vhost backend will have no chance to be waked up
1845          */
1846         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1847         if (hw->max_queue_pairs > 1) {
1848                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1849                         return -EINVAL;
1850         }
1851
1852         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1853
1854         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1855                 rxvq = dev->data->rx_queues[i];
1856                 /* Flush the old packets */
1857                 virtqueue_rxvq_flush(rxvq->vq);
1858                 virtqueue_notify(rxvq->vq);
1859         }
1860
1861         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1862                 txvq = dev->data->tx_queues[i];
1863                 virtqueue_notify(txvq->vq);
1864         }
1865
1866         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1867
1868         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1869                 rxvq = dev->data->rx_queues[i];
1870                 VIRTQUEUE_DUMP(rxvq->vq);
1871         }
1872
1873         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1874                 txvq = dev->data->tx_queues[i];
1875                 VIRTQUEUE_DUMP(txvq->vq);
1876         }
1877
1878         set_rxtx_funcs(dev);
1879         hw->started = 1;
1880
1881         /* Initialize Link state */
1882         virtio_dev_link_update(dev, 0);
1883
1884         return 0;
1885 }
1886
1887 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1888 {
1889         struct rte_mbuf *buf;
1890         int i, mbuf_num = 0;
1891
1892         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1893                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1894
1895                 if (rxvq == NULL || rxvq->vq == NULL)
1896                         continue;
1897
1898                 PMD_INIT_LOG(DEBUG,
1899                              "Before freeing rxq[%d] used and unused buf", i);
1900                 VIRTQUEUE_DUMP(rxvq->vq);
1901
1902                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1903                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1904                         rte_pktmbuf_free(buf);
1905                         mbuf_num++;
1906                 }
1907
1908                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1909                 PMD_INIT_LOG(DEBUG,
1910                              "After freeing rxq[%d] used and unused buf", i);
1911                 VIRTQUEUE_DUMP(rxvq->vq);
1912         }
1913
1914         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1915                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1916
1917                 if (txvq == NULL || txvq->vq == NULL)
1918                         continue;
1919
1920                 PMD_INIT_LOG(DEBUG,
1921                              "Before freeing txq[%d] used and unused bufs",
1922                              i);
1923                 VIRTQUEUE_DUMP(txvq->vq);
1924
1925                 mbuf_num = 0;
1926                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1927                         rte_pktmbuf_free(buf);
1928                         mbuf_num++;
1929                 }
1930
1931                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1932                 PMD_INIT_LOG(DEBUG,
1933                              "After freeing txq[%d] used and unused buf", i);
1934                 VIRTQUEUE_DUMP(txvq->vq);
1935         }
1936 }
1937
1938 /*
1939  * Stop device: disable interrupt and mark link down
1940  */
1941 static void
1942 virtio_dev_stop(struct rte_eth_dev *dev)
1943 {
1944         struct virtio_hw *hw = dev->data->dev_private;
1945         struct rte_eth_link link;
1946         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1947
1948         PMD_INIT_LOG(DEBUG, "stop");
1949
1950         if (intr_conf->lsc || intr_conf->rxq)
1951                 virtio_intr_disable(dev);
1952
1953         hw->started = 0;
1954         memset(&link, 0, sizeof(link));
1955         virtio_dev_atomic_write_link_status(dev, &link);
1956 }
1957
1958 static int
1959 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1960 {
1961         struct rte_eth_link link, old;
1962         uint16_t status;
1963         struct virtio_hw *hw = dev->data->dev_private;
1964         memset(&link, 0, sizeof(link));
1965         virtio_dev_atomic_read_link_status(dev, &link);
1966         old = link;
1967         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1968         link.link_speed  = SPEED_10G;
1969
1970         if (hw->started == 0) {
1971                 link.link_status = ETH_LINK_DOWN;
1972         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1973                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1974                 vtpci_read_dev_config(hw,
1975                                 offsetof(struct virtio_net_config, status),
1976                                 &status, sizeof(status));
1977                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1978                         link.link_status = ETH_LINK_DOWN;
1979                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1980                                      dev->data->port_id);
1981                 } else {
1982                         link.link_status = ETH_LINK_UP;
1983                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1984                                      dev->data->port_id);
1985                 }
1986         } else {
1987                 link.link_status = ETH_LINK_UP;
1988         }
1989         virtio_dev_atomic_write_link_status(dev, &link);
1990
1991         return (old.link_status == link.link_status) ? -1 : 0;
1992 }
1993
1994 static int
1995 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1996 {
1997         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1998         struct virtio_hw *hw = dev->data->dev_private;
1999
2000         if (mask & ETH_VLAN_FILTER_MASK) {
2001                 if (rxmode->hw_vlan_filter &&
2002                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2003
2004                         PMD_DRV_LOG(NOTICE,
2005                                 "vlan filtering not available on this host");
2006
2007                         return -ENOTSUP;
2008                 }
2009         }
2010
2011         if (mask & ETH_VLAN_STRIP_MASK)
2012                 hw->vlan_strip = rxmode->hw_vlan_strip;
2013
2014         return 0;
2015 }
2016
2017 static void
2018 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2019 {
2020         uint64_t tso_mask, host_features;
2021         struct virtio_hw *hw = dev->data->dev_private;
2022
2023         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2024
2025         dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
2026         dev_info->max_rx_queues =
2027                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2028         dev_info->max_tx_queues =
2029                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2030         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2031         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2032         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2033         dev_info->default_txconf = (struct rte_eth_txconf) {
2034                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2035         };
2036
2037         host_features = VTPCI_OPS(hw)->get_features(hw);
2038         dev_info->rx_offload_capa = 0;
2039         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2040                 dev_info->rx_offload_capa |=
2041                         DEV_RX_OFFLOAD_TCP_CKSUM |
2042                         DEV_RX_OFFLOAD_UDP_CKSUM;
2043         }
2044         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2045                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2046         if ((host_features & tso_mask) == tso_mask)
2047                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2048
2049         dev_info->tx_offload_capa = 0;
2050         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2051                 dev_info->tx_offload_capa |=
2052                         DEV_TX_OFFLOAD_UDP_CKSUM |
2053                         DEV_TX_OFFLOAD_TCP_CKSUM;
2054         }
2055         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2056                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2057         if ((hw->guest_features & tso_mask) == tso_mask)
2058                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2059 }
2060
2061 /*
2062  * It enables testpmd to collect per queue stats.
2063  */
2064 static int
2065 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2066 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2067 __rte_unused uint8_t is_rx)
2068 {
2069         return 0;
2070 }
2071
2072 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2073 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2074 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");