drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_atomic.h>
  46 #include <rte_branch_prediction.h>
  47 #include <rte_pci.h>
  48 #include <rte_ether.h>
  49 #include <rte_common.h>
  50 #include <rte_errno.h>
  51
  52 #include <rte_memory.h>
  53 #include <rte_eal.h>
  54 #include <rte_dev.h>
  55
  56 #include "virtio_ethdev.h"
  57 #include "virtio_pci.h"
  58 #include "virtio_logs.h"
  59 #include "virtqueue.h"
  60 #include "virtio_rxtx.h"
  61
  62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  64 static int  virtio_dev_start(struct rte_eth_dev *dev);
  65 static void virtio_dev_stop(struct rte_eth_dev *dev);
  66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  71                                 struct rte_eth_dev_info *dev_info);
  72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  73         __rte_unused int wait_to_complete);
  74
  75 static void virtio_set_hwaddr(struct virtio_hw *hw);
  76 static void virtio_get_hwaddr(struct virtio_hw *hw);
  77
  78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  79                                  struct rte_eth_stats *stats);
  80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_xstat *xstats, unsigned n);
  82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  83                                        struct rte_eth_xstat_name *xstats_names,
  84                                        unsigned limit);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_DEVICEID_MIN) },
 107         { .vendor_id = 0, /* sentinel */ },
 108 };
 109
 110 struct rte_virtio_xstats_name_off {
 111         char name[RTE_ETH_XSTATS_NAME_SIZE];
 112         unsigned offset;
 113 };
 114
 115 /* [rt]x_qX_ is prepended to the name string here */
 116 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 117         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 118         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 119         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 120         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 121         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 122         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 123         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 124         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 125         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 126         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 127         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 128         {"size_1024_1517_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 129         {"size_1518_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 130 };
 131
 132 /* [rt]x_qX_ is prepended to the name string here */
 133 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 134         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 135         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 136         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 137         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 138         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 139         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 140         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 141         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 142         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 143         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 144         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 145         {"size_1024_1517_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 146         {"size_1518_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 147 };
 148
 149 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 150                             sizeof(rte_virtio_rxq_stat_strings[0]))
 151 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 152                             sizeof(rte_virtio_txq_stat_strings[0]))
 153
 154 static int
 155 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 156                 int *dlen, int pkt_num)
 157 {
 158         uint32_t head, i;
 159         int k, sum = 0;
 160         virtio_net_ctrl_ack status = ~0;
 161         struct virtio_pmd_ctrl result;
 162         struct virtqueue *vq;
 163
 164         ctrl->status = status;
 165
 166         if (!cvq || !cvq->vq) {
 167                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 168                 return -1;
 169         }
 170         vq = cvq->vq;
 171         head = vq->vq_desc_head_idx;
 172
 173         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 174                 "vq->hw->cvq = %p vq = %p",
 175                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 176
 177         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 178                 return -1;
 179
 180         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 181                 sizeof(struct virtio_pmd_ctrl));
 182
 183         /*
 184          * Format is enforced in qemu code:
 185          * One TX packet for header;
 186          * At least one TX packet per argument;
 187          * One RX packet for ACK.
 188          */
 189         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 190         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 191         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 192         vq->vq_free_cnt--;
 193         i = vq->vq_ring.desc[head].next;
 194
 195         for (k = 0; k < pkt_num; k++) {
 196                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 197                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 198                         + sizeof(struct virtio_net_ctrl_hdr)
 199                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 200                 vq->vq_ring.desc[i].len = dlen[k];
 201                 sum += dlen[k];
 202                 vq->vq_free_cnt--;
 203                 i = vq->vq_ring.desc[i].next;
 204         }
 205
 206         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 207         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 208                         + sizeof(struct virtio_net_ctrl_hdr);
 209         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 210         vq->vq_free_cnt--;
 211
 212         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 213
 214         vq_update_avail_ring(vq, head);
 215         vq_update_avail_idx(vq);
 216
 217         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 218
 219         virtqueue_notify(vq);
 220
 221         rte_rmb();
 222         while (VIRTQUEUE_NUSED(vq) == 0) {
 223                 rte_rmb();
 224                 usleep(100);
 225         }
 226
 227         while (VIRTQUEUE_NUSED(vq)) {
 228                 uint32_t idx, desc_idx, used_idx;
 229                 struct vring_used_elem *uep;
 230
 231                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 232                                 & (vq->vq_nentries - 1));
 233                 uep = &vq->vq_ring.used->ring[used_idx];
 234                 idx = (uint32_t) uep->id;
 235                 desc_idx = idx;
 236
 237                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 238                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 239                         vq->vq_free_cnt++;
 240                 }
 241
 242                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 243                 vq->vq_desc_head_idx = idx;
 244
 245                 vq->vq_used_cons_idx++;
 246                 vq->vq_free_cnt++;
 247         }
 248
 249         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 250                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 251
 252         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 253                         sizeof(struct virtio_pmd_ctrl));
 254
 255         return result.status;
 256 }
 257
 258 static int
 259 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 260 {
 261         struct virtio_hw *hw = dev->data->dev_private;
 262         struct virtio_pmd_ctrl ctrl;
 263         int dlen[1];
 264         int ret;
 265
 266         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 267         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 268         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 269
 270         dlen[0] = sizeof(uint16_t);
 271
 272         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 273         if (ret) {
 274                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 275                           "failed, this is too late now...");
 276                 return -EINVAL;
 277         }
 278
 279         return 0;
 280 }
 281
 282 void
 283 virtio_dev_queue_release(struct virtqueue *vq)
 284 {
 285         struct virtio_hw *hw;
 286
 287         if (vq) {
 288                 hw = vq->hw;
 289                 if (vq->configured)
 290                         hw->vtpci_ops->del_queue(hw, vq);
 291
 292                 rte_free(vq->sw_ring);
 293                 rte_free(vq);
 294         }
 295 }
 296
 297 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 298                         int queue_type,
 299                         uint16_t queue_idx,
 300                         uint16_t vtpci_queue_idx,
 301                         uint16_t nb_desc,
 302                         unsigned int socket_id,
 303                         void **pvq)
 304 {
 305         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 306         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 307         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 308         unsigned int vq_size, size;
 309         struct virtio_hw *hw = dev->data->dev_private;
 310         struct virtnet_rx *rxvq = NULL;
 311         struct virtnet_tx *txvq = NULL;
 312         struct virtnet_ctl *cvq = NULL;
 313         struct virtqueue *vq;
 314         const char *queue_names[] = {"rvq", "txq", "cvq"};
 315         size_t sz_vq, sz_q = 0, sz_hdr_mz = 0;
 316         void *sw_ring = NULL;
 317         int ret;
 318
 319         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 320
 321         /*
 322          * Read the virtqueue size from the Queue Size field
 323          * Always power of 2 and if 0 virtqueue does not exist
 324          */
 325         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 326         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 327         if (vq_size == 0) {
 328                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 329                 return -EINVAL;
 330         }
 331
 332         if (!rte_is_power_of_2(vq_size)) {
 333                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 334                 return -EINVAL;
 335         }
 336
 337         snprintf(vq_name, sizeof(vq_name), "port%d_%s%d",
 338                  dev->data->port_id, queue_names[queue_type], queue_idx);
 339
 340         sz_vq = RTE_ALIGN_CEIL(sizeof(*vq) +
 341                                 vq_size * sizeof(struct vq_desc_extra),
 342                                 RTE_CACHE_LINE_SIZE);
 343         if (queue_type == VTNET_RQ) {
 344                 sz_q = sz_vq + sizeof(*rxvq);
 345         } else if (queue_type == VTNET_TQ) {
 346                 sz_q = sz_vq + sizeof(*txvq);
 347                 /*
 348                  * For each xmit packet, allocate a virtio_net_hdr
 349                  * and indirect ring elements
 350                  */
 351                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 352         } else if (queue_type == VTNET_CQ) {
 353                 sz_q = sz_vq + sizeof(*cvq);
 354                 /* Allocate a page for control vq command, data and status */
 355                 sz_hdr_mz = PAGE_SIZE;
 356         }
 357
 358         vq = rte_zmalloc_socket(vq_name, sz_q, RTE_CACHE_LINE_SIZE, socket_id);
 359         if (vq == NULL) {
 360                 PMD_INIT_LOG(ERR, "can not allocate vq");
 361                 return -ENOMEM;
 362         }
 363         vq->hw = hw;
 364         vq->vq_queue_index = vtpci_queue_idx;
 365         vq->vq_nentries = vq_size;
 366
 367         if (nb_desc == 0 || nb_desc > vq_size)
 368                 nb_desc = vq_size;
 369         vq->vq_free_cnt = nb_desc;
 370
 371         /*
 372          * Reserve a memzone for vring elements
 373          */
 374         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 375         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 376         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 377                      size, vq->vq_ring_size);
 378
 379         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, socket_id,
 380                                          0, VIRTIO_PCI_VRING_ALIGN);
 381         if (mz == NULL) {
 382                 if (rte_errno == EEXIST)
 383                         mz = rte_memzone_lookup(vq_name);
 384                 if (mz == NULL) {
 385                         ret = -ENOMEM;
 386                         goto fail_q_alloc;
 387                 }
 388         }
 389
 390         memset(mz->addr, 0, sizeof(mz->len));
 391
 392         vq->vq_ring_mem = mz->phys_addr;
 393         vq->vq_ring_virt_mem = mz->addr;
 394         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 395                      (uint64_t)mz->phys_addr);
 396         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 397                      (uint64_t)(uintptr_t)mz->addr);
 398
 399         if (sz_hdr_mz) {
 400                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_%s%d_hdr",
 401                          dev->data->port_id, queue_names[queue_type],
 402                          queue_idx);
 403                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 404                                                      socket_id, 0,
 405                                                      RTE_CACHE_LINE_SIZE);
 406                 if (hdr_mz == NULL) {
 407                         if (rte_errno == EEXIST)
 408                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 409                         if (hdr_mz == NULL) {
 410                                 ret = -ENOMEM;
 411                                 goto fail_q_alloc;
 412                         }
 413                 }
 414         }
 415
 416         if (queue_type == VTNET_RQ) {
 417                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 418                                sizeof(vq->sw_ring[0]);
 419
 420                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 421                                              RTE_CACHE_LINE_SIZE, socket_id);
 422                 if (!sw_ring) {
 423                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 424                         ret = -ENOMEM;
 425                         goto fail_q_alloc;
 426                 }
 427
 428                 vq->sw_ring = sw_ring;
 429                 rxvq = (struct virtnet_rx *)RTE_PTR_ADD(vq, sz_vq);
 430                 rxvq->vq = vq;
 431                 rxvq->port_id = dev->data->port_id;
 432                 rxvq->queue_id = queue_idx;
 433                 rxvq->mz = mz;
 434                 *pvq = rxvq;
 435         } else if (queue_type == VTNET_TQ) {
 436                 txvq = (struct virtnet_tx *)RTE_PTR_ADD(vq, sz_vq);
 437                 txvq->vq = vq;
 438                 txvq->port_id = dev->data->port_id;
 439                 txvq->queue_id = queue_idx;
 440                 txvq->mz = mz;
 441                 txvq->virtio_net_hdr_mz = hdr_mz;
 442                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 443
 444                 *pvq = txvq;
 445         } else if (queue_type == VTNET_CQ) {
 446                 cvq = (struct virtnet_ctl *)RTE_PTR_ADD(vq, sz_vq);
 447                 cvq->vq = vq;
 448                 cvq->mz = mz;
 449                 cvq->virtio_net_hdr_mz = hdr_mz;
 450                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 451                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 452                 *pvq = cvq;
 453         }
 454
 455         /* For virtio-user case (that is when dev->pci_dev is NULL), we use
 456          * virtual address. And we need properly set _offset_, please see
 457          * MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 458          */
 459         if (dev->pci_dev)
 460                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 461         else {
 462                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 463                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 464                 if (queue_type == VTNET_TQ)
 465                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 466                 else if (queue_type == VTNET_CQ)
 467                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 468         }
 469
 470         if (queue_type == VTNET_TQ) {
 471                 struct virtio_tx_region *txr;
 472                 unsigned int i;
 473
 474                 txr = hdr_mz->addr;
 475                 memset(txr, 0, vq_size * sizeof(*txr));
 476                 for (i = 0; i < vq_size; i++) {
 477                         struct vring_desc *start_dp = txr[i].tx_indir;
 478
 479                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 480
 481                         /* first indirect descriptor is always the tx header */
 482                         start_dp->addr = txvq->virtio_net_hdr_mem
 483                                 + i * sizeof(*txr)
 484                                 + offsetof(struct virtio_tx_region, tx_hdr);
 485
 486                         start_dp->len = hw->vtnet_hdr_size;
 487                         start_dp->flags = VRING_DESC_F_NEXT;
 488                 }
 489         }
 490
 491         if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
 492                 PMD_INIT_LOG(ERR, "setup_queue failed");
 493                 virtio_dev_queue_release(vq);
 494                 return -EINVAL;
 495         }
 496
 497         vq->configured = 1;
 498         return 0;
 499
 500 fail_q_alloc:
 501         rte_free(sw_ring);
 502         rte_memzone_free(hdr_mz);
 503         rte_memzone_free(mz);
 504         rte_free(vq);
 505
 506         return ret;
 507 }
 508
 509 static int
 510 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 511                 uint32_t socket_id)
 512 {
 513         struct virtnet_ctl *cvq;
 514         int ret;
 515         struct virtio_hw *hw = dev->data->dev_private;
 516
 517         PMD_INIT_FUNC_TRACE();
 518         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 519                         vtpci_queue_idx, 0, socket_id, (void **)&cvq);
 520         if (ret < 0) {
 521                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 522                 return ret;
 523         }
 524
 525         hw->cvq = cvq;
 526         return 0;
 527 }
 528
 529 static void
 530 virtio_free_queues(struct rte_eth_dev *dev)
 531 {
 532         unsigned int i;
 533
 534         for (i = 0; i < dev->data->nb_rx_queues; i++)
 535                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 536
 537         dev->data->nb_rx_queues = 0;
 538
 539         for (i = 0; i < dev->data->nb_tx_queues; i++)
 540                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 541
 542         dev->data->nb_tx_queues = 0;
 543 }
 544
 545 static void
 546 virtio_dev_close(struct rte_eth_dev *dev)
 547 {
 548         struct virtio_hw *hw = dev->data->dev_private;
 549
 550         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 551
 552         if (hw->started == 1)
 553                 virtio_dev_stop(dev);
 554
 555         /* reset the NIC */
 556         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 557                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 558         vtpci_reset(hw);
 559         virtio_dev_free_mbufs(dev);
 560         virtio_free_queues(dev);
 561 }
 562
 563 static void
 564 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 565 {
 566         struct virtio_hw *hw = dev->data->dev_private;
 567         struct virtio_pmd_ctrl ctrl;
 568         int dlen[1];
 569         int ret;
 570
 571         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 572                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 573                 return;
 574         }
 575
 576         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 577         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 578         ctrl.data[0] = 1;
 579         dlen[0] = 1;
 580
 581         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 582         if (ret)
 583                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 584 }
 585
 586 static void
 587 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 588 {
 589         struct virtio_hw *hw = dev->data->dev_private;
 590         struct virtio_pmd_ctrl ctrl;
 591         int dlen[1];
 592         int ret;
 593
 594         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 595                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 596                 return;
 597         }
 598
 599         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 600         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 601         ctrl.data[0] = 0;
 602         dlen[0] = 1;
 603
 604         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 605         if (ret)
 606                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 607 }
 608
 609 static void
 610 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 611 {
 612         struct virtio_hw *hw = dev->data->dev_private;
 613         struct virtio_pmd_ctrl ctrl;
 614         int dlen[1];
 615         int ret;
 616
 617         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 618                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 619                 return;
 620         }
 621
 622         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 623         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 624         ctrl.data[0] = 1;
 625         dlen[0] = 1;
 626
 627         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 628         if (ret)
 629                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 630 }
 631
 632 static void
 633 virtio_dev_allmulticast_disable(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\n");
 642                 return;
 643         }
 644
 645         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 646         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 647         ctrl.data[0] = 0;
 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 disable allmulticast");
 653 }
 654
 655 /*
 656  * dev_ops for virtio, bare necessities for basic operation
 657  */
 658 static const struct eth_dev_ops virtio_eth_dev_ops = {
 659         .dev_configure           = virtio_dev_configure,
 660         .dev_start               = virtio_dev_start,
 661         .dev_stop                = virtio_dev_stop,
 662         .dev_close               = virtio_dev_close,
 663         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 664         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 665         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 666         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 667
 668         .dev_infos_get           = virtio_dev_info_get,
 669         .stats_get               = virtio_dev_stats_get,
 670         .xstats_get              = virtio_dev_xstats_get,
 671         .xstats_get_names        = virtio_dev_xstats_get_names,
 672         .stats_reset             = virtio_dev_stats_reset,
 673         .xstats_reset            = virtio_dev_stats_reset,
 674         .link_update             = virtio_dev_link_update,
 675         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 676         .rx_queue_release        = virtio_dev_rx_queue_release,
 677         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 678         .tx_queue_release        = virtio_dev_tx_queue_release,
 679         /* collect stats per queue */
 680         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 681         .vlan_filter_set         = virtio_vlan_filter_set,
 682         .mac_addr_add            = virtio_mac_addr_add,
 683         .mac_addr_remove         = virtio_mac_addr_remove,
 684         .mac_addr_set            = virtio_mac_addr_set,
 685 };
 686
 687 static inline int
 688 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 689                                 struct rte_eth_link *link)
 690 {
 691         struct rte_eth_link *dst = link;
 692         struct rte_eth_link *src = &(dev->data->dev_link);
 693
 694         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 695                         *(uint64_t *)src) == 0)
 696                 return -1;
 697
 698         return 0;
 699 }
 700
 701 /**
 702  * Atomically writes the link status information into global
 703  * structure rte_eth_dev.
 704  *
 705  * @param dev
 706  *   - Pointer to the structure rte_eth_dev to read from.
 707  *   - Pointer to the buffer to be saved with the link status.
 708  *
 709  * @return
 710  *   - On success, zero.
 711  *   - On failure, negative value.
 712  */
 713 static inline int
 714 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 715                 struct rte_eth_link *link)
 716 {
 717         struct rte_eth_link *dst = &(dev->data->dev_link);
 718         struct rte_eth_link *src = link;
 719
 720         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 721                                         *(uint64_t *)src) == 0)
 722                 return -1;
 723
 724         return 0;
 725 }
 726
 727 static void
 728 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 729 {
 730         unsigned i;
 731
 732         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 733                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 734                 if (txvq == NULL)
 735                         continue;
 736
 737                 stats->opackets += txvq->stats.packets;
 738                 stats->obytes += txvq->stats.bytes;
 739                 stats->oerrors += txvq->stats.errors;
 740
 741                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 742                         stats->q_opackets[i] = txvq->stats.packets;
 743                         stats->q_obytes[i] = txvq->stats.bytes;
 744                 }
 745         }
 746
 747         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 748                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 749                 if (rxvq == NULL)
 750                         continue;
 751
 752                 stats->ipackets += rxvq->stats.packets;
 753                 stats->ibytes += rxvq->stats.bytes;
 754                 stats->ierrors += rxvq->stats.errors;
 755
 756                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 757                         stats->q_ipackets[i] = rxvq->stats.packets;
 758                         stats->q_ibytes[i] = rxvq->stats.bytes;
 759                 }
 760         }
 761
 762         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 763 }
 764
 765 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 766                                        struct rte_eth_xstat_name *xstats_names,
 767                                        __rte_unused unsigned limit)
 768 {
 769         unsigned i;
 770         unsigned count = 0;
 771         unsigned t;
 772
 773         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 774                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 775
 776         if (xstats_names != NULL) {
 777                 /* Note: limit checked in rte_eth_xstats_names() */
 778
 779                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 780                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 781                         if (rxvq == NULL)
 782                                 continue;
 783                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 784                                 snprintf(xstats_names[count].name,
 785                                         sizeof(xstats_names[count].name),
 786                                         "rx_q%u_%s", i,
 787                                         rte_virtio_rxq_stat_strings[t].name);
 788                                 count++;
 789                         }
 790                 }
 791
 792                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 793                         struct virtqueue *txvq = dev->data->tx_queues[i];
 794                         if (txvq == NULL)
 795                                 continue;
 796                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 797                                 snprintf(xstats_names[count].name,
 798                                         sizeof(xstats_names[count].name),
 799                                         "tx_q%u_%s", i,
 800                                         rte_virtio_txq_stat_strings[t].name);
 801                                 count++;
 802                         }
 803                 }
 804                 return count;
 805         }
 806         return nstats;
 807 }
 808
 809 static int
 810 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 811                       unsigned n)
 812 {
 813         unsigned i;
 814         unsigned count = 0;
 815
 816         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 817                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 818
 819         if (n < nstats)
 820                 return nstats;
 821
 822         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 823                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 824
 825                 if (rxvq == NULL)
 826                         continue;
 827
 828                 unsigned t;
 829
 830                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 831                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 832                                 rte_virtio_rxq_stat_strings[t].offset);
 833                         count++;
 834                 }
 835         }
 836
 837         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 838                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 839
 840                 if (txvq == NULL)
 841                         continue;
 842
 843                 unsigned t;
 844
 845                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 846                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 847                                 rte_virtio_txq_stat_strings[t].offset);
 848                         count++;
 849                 }
 850         }
 851
 852         return count;
 853 }
 854
 855 static void
 856 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 857 {
 858         virtio_update_stats(dev, stats);
 859 }
 860
 861 static void
 862 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 863 {
 864         unsigned int i;
 865
 866         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 867                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 868                 if (txvq == NULL)
 869                         continue;
 870
 871                 txvq->stats.packets = 0;
 872                 txvq->stats.bytes = 0;
 873                 txvq->stats.errors = 0;
 874                 txvq->stats.multicast = 0;
 875                 txvq->stats.broadcast = 0;
 876                 memset(txvq->stats.size_bins, 0,
 877                        sizeof(txvq->stats.size_bins[0]) * 8);
 878         }
 879
 880         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 881                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 882                 if (rxvq == NULL)
 883                         continue;
 884
 885                 rxvq->stats.packets = 0;
 886                 rxvq->stats.bytes = 0;
 887                 rxvq->stats.errors = 0;
 888                 rxvq->stats.multicast = 0;
 889                 rxvq->stats.broadcast = 0;
 890                 memset(rxvq->stats.size_bins, 0,
 891                        sizeof(rxvq->stats.size_bins[0]) * 8);
 892         }
 893 }
 894
 895 static void
 896 virtio_set_hwaddr(struct virtio_hw *hw)
 897 {
 898         vtpci_write_dev_config(hw,
 899                         offsetof(struct virtio_net_config, mac),
 900                         &hw->mac_addr, ETHER_ADDR_LEN);
 901 }
 902
 903 static void
 904 virtio_get_hwaddr(struct virtio_hw *hw)
 905 {
 906         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 907                 vtpci_read_dev_config(hw,
 908                         offsetof(struct virtio_net_config, mac),
 909                         &hw->mac_addr, ETHER_ADDR_LEN);
 910         } else {
 911                 eth_random_addr(&hw->mac_addr[0]);
 912                 virtio_set_hwaddr(hw);
 913         }
 914 }
 915
 916 static void
 917 virtio_mac_table_set(struct virtio_hw *hw,
 918                      const struct virtio_net_ctrl_mac *uc,
 919                      const struct virtio_net_ctrl_mac *mc)
 920 {
 921         struct virtio_pmd_ctrl ctrl;
 922         int err, len[2];
 923
 924         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 925                 PMD_DRV_LOG(INFO, "host does not support mac table");
 926                 return;
 927         }
 928
 929         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 930         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 931
 932         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 933         memcpy(ctrl.data, uc, len[0]);
 934
 935         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 936         memcpy(ctrl.data + len[0], mc, len[1]);
 937
 938         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 939         if (err != 0)
 940                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 941 }
 942
 943 static void
 944 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 945                     uint32_t index, uint32_t vmdq __rte_unused)
 946 {
 947         struct virtio_hw *hw = dev->data->dev_private;
 948         const struct ether_addr *addrs = dev->data->mac_addrs;
 949         unsigned int i;
 950         struct virtio_net_ctrl_mac *uc, *mc;
 951
 952         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 953                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 954                 return;
 955         }
 956
 957         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 958         uc->entries = 0;
 959         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 960         mc->entries = 0;
 961
 962         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 963                 const struct ether_addr *addr
 964                         = (i == index) ? mac_addr : addrs + i;
 965                 struct virtio_net_ctrl_mac *tbl
 966                         = is_multicast_ether_addr(addr) ? mc : uc;
 967
 968                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 969         }
 970
 971         virtio_mac_table_set(hw, uc, mc);
 972 }
 973
 974 static void
 975 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 976 {
 977         struct virtio_hw *hw = dev->data->dev_private;
 978         struct ether_addr *addrs = dev->data->mac_addrs;
 979         struct virtio_net_ctrl_mac *uc, *mc;
 980         unsigned int i;
 981
 982         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 983                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 984                 return;
 985         }
 986
 987         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 988         uc->entries = 0;
 989         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 990         mc->entries = 0;
 991
 992         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 993                 struct virtio_net_ctrl_mac *tbl;
 994
 995                 if (i == index || is_zero_ether_addr(addrs + i))
 996                         continue;
 997
 998                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 999                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1000         }
1001
1002         virtio_mac_table_set(hw, uc, mc);
1003 }
1004
1005 static void
1006 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1007 {
1008         struct virtio_hw *hw = dev->data->dev_private;
1009
1010         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1011
1012         /* Use atomic update if available */
1013         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1014                 struct virtio_pmd_ctrl ctrl;
1015                 int len = ETHER_ADDR_LEN;
1016
1017                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1018                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1019
1020                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1021                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1022         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1023                 virtio_set_hwaddr(hw);
1024 }
1025
1026 static int
1027 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1028 {
1029         struct virtio_hw *hw = dev->data->dev_private;
1030         struct virtio_pmd_ctrl ctrl;
1031         int len;
1032
1033         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1034                 return -ENOTSUP;
1035
1036         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1037         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1038         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1039         len = sizeof(vlan_id);
1040
1041         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1042 }
1043
1044 static int
1045 virtio_negotiate_features(struct virtio_hw *hw)
1046 {
1047         uint64_t host_features;
1048
1049         /* Prepare guest_features: feature that driver wants to support */
1050         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
1051         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1052                 hw->guest_features);
1053
1054         /* Read device(host) feature bits */
1055         host_features = hw->vtpci_ops->get_features(hw);
1056         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1057                 host_features);
1058
1059         /*
1060          * Negotiate features: Subset of device feature bits are written back
1061          * guest feature bits.
1062          */
1063         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1064         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1065                 hw->guest_features);
1066
1067         if (hw->modern) {
1068                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1069                         PMD_INIT_LOG(ERR,
1070                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1071                         return -1;
1072                 }
1073                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1074                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1075                         PMD_INIT_LOG(ERR,
1076                                 "failed to set FEATURES_OK status!");
1077                         return -1;
1078                 }
1079         }
1080
1081         return 0;
1082 }
1083
1084 /*
1085  * Process Virtio Config changed interrupt and call the callback
1086  * if link state changed.
1087  */
1088 static void
1089 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1090                          void *param)
1091 {
1092         struct rte_eth_dev *dev = param;
1093         struct virtio_hw *hw = dev->data->dev_private;
1094         uint8_t isr;
1095
1096         /* Read interrupt status which clears interrupt */
1097         isr = vtpci_isr(hw);
1098         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1099
1100         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1101                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1102
1103         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1104                 if (virtio_dev_link_update(dev, 0) == 0)
1105                         _rte_eth_dev_callback_process(dev,
1106                                                       RTE_ETH_EVENT_INTR_LSC);
1107         }
1108
1109 }
1110
1111 static void
1112 rx_func_get(struct rte_eth_dev *eth_dev)
1113 {
1114         struct virtio_hw *hw = eth_dev->data->dev_private;
1115         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1116                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1117         else
1118                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1119 }
1120
1121 /*
1122  * This function is based on probe() function in virtio_pci.c
1123  * It returns 0 on success.
1124  */
1125 int
1126 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1127 {
1128         struct virtio_hw *hw = eth_dev->data->dev_private;
1129         struct virtio_net_config *config;
1130         struct virtio_net_config local_config;
1131         struct rte_pci_device *pci_dev;
1132         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1133         int ret;
1134
1135         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1136
1137         eth_dev->dev_ops = &virtio_eth_dev_ops;
1138         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1139
1140         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1141                 rx_func_get(eth_dev);
1142                 return 0;
1143         }
1144
1145         /* Allocate memory for storing MAC addresses */
1146         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1147         if (eth_dev->data->mac_addrs == NULL) {
1148                 PMD_INIT_LOG(ERR,
1149                         "Failed to allocate %d bytes needed to store MAC addresses",
1150                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1151                 return -ENOMEM;
1152         }
1153
1154         pci_dev = eth_dev->pci_dev;
1155
1156         if (pci_dev) {
1157                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1158                 if (ret)
1159                         return ret;
1160         }
1161
1162         /* Reset the device although not necessary at startup */
1163         vtpci_reset(hw);
1164
1165         /* Tell the host we've noticed this device. */
1166         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1167
1168         /* Tell the host we've known how to drive the device. */
1169         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1170         if (virtio_negotiate_features(hw) < 0)
1171                 return -1;
1172
1173         /* If host does not support status then disable LSC */
1174         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1175                 dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1176
1177         rte_eth_copy_pci_info(eth_dev, pci_dev);
1178         eth_dev->data->dev_flags = dev_flags;
1179
1180         rx_func_get(eth_dev);
1181
1182         /* Setting up rx_header size for the device */
1183         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1184             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1185                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1186         else
1187                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1188
1189         /* Copy the permanent MAC address to: virtio_hw */
1190         virtio_get_hwaddr(hw);
1191         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1192                         &eth_dev->data->mac_addrs[0]);
1193         PMD_INIT_LOG(DEBUG,
1194                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1195                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1196                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1197
1198         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1199                 config = &local_config;
1200
1201                 vtpci_read_dev_config(hw,
1202                         offsetof(struct virtio_net_config, mac),
1203                         &config->mac, sizeof(config->mac));
1204
1205                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1206                         vtpci_read_dev_config(hw,
1207                                 offsetof(struct virtio_net_config, status),
1208                                 &config->status, sizeof(config->status));
1209                 } else {
1210                         PMD_INIT_LOG(DEBUG,
1211                                      "VIRTIO_NET_F_STATUS is not supported");
1212                         config->status = 0;
1213                 }
1214
1215                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1216                         vtpci_read_dev_config(hw,
1217                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1218                                 &config->max_virtqueue_pairs,
1219                                 sizeof(config->max_virtqueue_pairs));
1220                 } else {
1221                         PMD_INIT_LOG(DEBUG,
1222                                      "VIRTIO_NET_F_MQ is not supported");
1223                         config->max_virtqueue_pairs = 1;
1224                 }
1225
1226                 hw->max_rx_queues =
1227                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1228                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1229                 hw->max_tx_queues =
1230                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1231                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1232
1233                 virtio_dev_cq_queue_setup(eth_dev,
1234                                         config->max_virtqueue_pairs * 2,
1235                                         SOCKET_ID_ANY);
1236
1237                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1238                                 config->max_virtqueue_pairs);
1239                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1240                 PMD_INIT_LOG(DEBUG,
1241                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1242                                 config->mac[0], config->mac[1],
1243                                 config->mac[2], config->mac[3],
1244                                 config->mac[4], config->mac[5]);
1245         } else {
1246                 hw->max_rx_queues = 1;
1247                 hw->max_tx_queues = 1;
1248         }
1249
1250         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1251                         hw->max_rx_queues, hw->max_tx_queues);
1252         if (pci_dev)
1253                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1254                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1255                         pci_dev->id.device_id);
1256
1257         /* Setup interrupt callback  */
1258         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1259                 rte_intr_callback_register(&pci_dev->intr_handle,
1260                                    virtio_interrupt_handler, eth_dev);
1261
1262         virtio_dev_cq_start(eth_dev);
1263
1264         return 0;
1265 }
1266
1267 static int
1268 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1269 {
1270         struct rte_pci_device *pci_dev;
1271         struct virtio_hw *hw = eth_dev->data->dev_private;
1272
1273         PMD_INIT_FUNC_TRACE();
1274
1275         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1276                 return -EPERM;
1277
1278         /* Close it anyway since there's no way to know if closed */
1279         virtio_dev_close(eth_dev);
1280
1281         pci_dev = eth_dev->pci_dev;
1282
1283         eth_dev->dev_ops = NULL;
1284         eth_dev->tx_pkt_burst = NULL;
1285         eth_dev->rx_pkt_burst = NULL;
1286
1287         if (hw->cvq)
1288                 virtio_dev_queue_release(hw->cvq->vq);
1289
1290         rte_free(eth_dev->data->mac_addrs);
1291         eth_dev->data->mac_addrs = NULL;
1292
1293         /* reset interrupt callback  */
1294         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1295                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1296                                                 virtio_interrupt_handler,
1297                                                 eth_dev);
1298         rte_eal_pci_unmap_device(pci_dev);
1299
1300         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1301
1302         return 0;
1303 }
1304
1305 static struct eth_driver rte_virtio_pmd = {
1306         .pci_drv = {
1307                 .name = "rte_virtio_pmd",
1308                 .id_table = pci_id_virtio_map,
1309                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1310         },
1311         .eth_dev_init = eth_virtio_dev_init,
1312         .eth_dev_uninit = eth_virtio_dev_uninit,
1313         .dev_private_size = sizeof(struct virtio_hw),
1314 };
1315
1316 /*
1317  * Driver initialization routine.
1318  * Invoked once at EAL init time.
1319  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1320  * Returns 0 on success.
1321  */
1322 static int
1323 rte_virtio_pmd_init(const char *name __rte_unused,
1324                     const char *param __rte_unused)
1325 {
1326         if (rte_eal_iopl_init() != 0) {
1327                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1328                 return -1;
1329         }
1330
1331         rte_eth_driver_register(&rte_virtio_pmd);
1332         return 0;
1333 }
1334
1335 /*
1336  * Configure virtio device
1337  * It returns 0 on success.
1338  */
1339 static int
1340 virtio_dev_configure(struct rte_eth_dev *dev)
1341 {
1342         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1343         struct virtio_hw *hw = dev->data->dev_private;
1344
1345         PMD_INIT_LOG(DEBUG, "configure");
1346
1347         if (rxmode->hw_ip_checksum) {
1348                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1349                 return -EINVAL;
1350         }
1351
1352         hw->vlan_strip = rxmode->hw_vlan_strip;
1353
1354         if (rxmode->hw_vlan_filter
1355             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1356                 PMD_DRV_LOG(NOTICE,
1357                             "vlan filtering not available on this host");
1358                 return -ENOTSUP;
1359         }
1360
1361         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1362                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1363                         PMD_DRV_LOG(ERR, "failed to set config vector");
1364                         return -EBUSY;
1365                 }
1366
1367         return 0;
1368 }
1369
1370
1371 static int
1372 virtio_dev_start(struct rte_eth_dev *dev)
1373 {
1374         uint16_t nb_queues, i;
1375         struct virtio_hw *hw = dev->data->dev_private;
1376         struct virtnet_rx *rxvq;
1377         struct virtnet_tx *txvq __rte_unused;
1378
1379         /* check if lsc interrupt feature is enabled */
1380         if (dev->data->dev_conf.intr_conf.lsc) {
1381                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1382                         PMD_DRV_LOG(ERR, "link status not supported by host");
1383                         return -ENOTSUP;
1384                 }
1385
1386                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1387                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1388                         return -EIO;
1389                 }
1390         }
1391
1392         /* Initialize Link state */
1393         virtio_dev_link_update(dev, 0);
1394
1395         /* On restart after stop do not touch queues */
1396         if (hw->started)
1397                 return 0;
1398
1399         /* Do final configuration before rx/tx engine starts */
1400         virtio_dev_rxtx_start(dev);
1401         vtpci_reinit_complete(hw);
1402
1403         hw->started = 1;
1404
1405         /*Notify the backend
1406          *Otherwise the tap backend might already stop its queue due to fullness.
1407          *vhost backend will have no chance to be waked up
1408          */
1409         nb_queues = dev->data->nb_rx_queues;
1410         if (nb_queues > 1) {
1411                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1412                         return -EINVAL;
1413         }
1414
1415         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1416
1417         for (i = 0; i < nb_queues; i++) {
1418                 rxvq = dev->data->rx_queues[i];
1419                 virtqueue_notify(rxvq->vq);
1420         }
1421
1422         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1423
1424         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1425                 rxvq = dev->data->rx_queues[i];
1426                 VIRTQUEUE_DUMP(rxvq->vq);
1427         }
1428
1429         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1430                 txvq = dev->data->tx_queues[i];
1431                 VIRTQUEUE_DUMP(txvq->vq);
1432         }
1433
1434         return 0;
1435 }
1436
1437 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1438 {
1439         struct rte_mbuf *buf;
1440         int i, mbuf_num = 0;
1441
1442         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1443                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1444
1445                 PMD_INIT_LOG(DEBUG,
1446                              "Before freeing rxq[%d] used and unused buf", i);
1447                 VIRTQUEUE_DUMP(rxvq->vq);
1448
1449                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1450                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1451                         rte_pktmbuf_free(buf);
1452                         mbuf_num++;
1453                 }
1454
1455                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1456                 PMD_INIT_LOG(DEBUG,
1457                              "After freeing rxq[%d] used and unused buf", i);
1458                 VIRTQUEUE_DUMP(rxvq->vq);
1459         }
1460
1461         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1462                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1463
1464                 PMD_INIT_LOG(DEBUG,
1465                              "Before freeing txq[%d] used and unused bufs",
1466                              i);
1467                 VIRTQUEUE_DUMP(txvq->vq);
1468
1469                 mbuf_num = 0;
1470                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1471                         rte_pktmbuf_free(buf);
1472                         mbuf_num++;
1473                 }
1474
1475                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1476                 PMD_INIT_LOG(DEBUG,
1477                              "After freeing txq[%d] used and unused buf", i);
1478                 VIRTQUEUE_DUMP(txvq->vq);
1479         }
1480 }
1481
1482 /*
1483  * Stop device: disable interrupt and mark link down
1484  */
1485 static void
1486 virtio_dev_stop(struct rte_eth_dev *dev)
1487 {
1488         struct rte_eth_link link;
1489         struct virtio_hw *hw = dev->data->dev_private;
1490
1491         PMD_INIT_LOG(DEBUG, "stop");
1492
1493         hw->started = 0;
1494
1495         if (dev->data->dev_conf.intr_conf.lsc)
1496                 rte_intr_disable(&dev->pci_dev->intr_handle);
1497
1498         memset(&link, 0, sizeof(link));
1499         virtio_dev_atomic_write_link_status(dev, &link);
1500 }
1501
1502 static int
1503 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1504 {
1505         struct rte_eth_link link, old;
1506         uint16_t status;
1507         struct virtio_hw *hw = dev->data->dev_private;
1508         memset(&link, 0, sizeof(link));
1509         virtio_dev_atomic_read_link_status(dev, &link);
1510         old = link;
1511         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1512         link.link_speed  = SPEED_10G;
1513
1514         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1515                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1516                 vtpci_read_dev_config(hw,
1517                                 offsetof(struct virtio_net_config, status),
1518                                 &status, sizeof(status));
1519                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1520                         link.link_status = ETH_LINK_DOWN;
1521                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1522                                      dev->data->port_id);
1523                 } else {
1524                         link.link_status = ETH_LINK_UP;
1525                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1526                                      dev->data->port_id);
1527                 }
1528         } else {
1529                 link.link_status = ETH_LINK_UP;
1530         }
1531         virtio_dev_atomic_write_link_status(dev, &link);
1532
1533         return (old.link_status == link.link_status) ? -1 : 0;
1534 }
1535
1536 static void
1537 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1538 {
1539         struct virtio_hw *hw = dev->data->dev_private;
1540
1541         if (dev->pci_dev)
1542                 dev_info->driver_name = dev->driver->pci_drv.name;
1543         else
1544                 dev_info->driver_name = "virtio-user PMD";
1545         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1546         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1547         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1548         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1549         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1550         dev_info->default_txconf = (struct rte_eth_txconf) {
1551                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1552         };
1553 }
1554
1555 /*
1556  * It enables testpmd to collect per queue stats.
1557  */
1558 static int
1559 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1560 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1561 __rte_unused uint8_t is_rx)
1562 {
1563         return 0;
1564 }
1565
1566 static struct rte_driver rte_virtio_driver = {
1567         .type = PMD_PDEV,
1568         .init = rte_virtio_pmd_init,
1569 };
1570
1571 PMD_REGISTER_DRIVER(rte_virtio_driver, virtio_net);
1572 DRIVER_REGISTER_PCI_TABLE(virtio_net, pci_id_virtio_map);