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
 107 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 108 #include "rte_pci_dev_ids.h"
 109
 110 { .vendor_id = 0, /* sentinel */ },
 111 };
 112
 113 struct rte_virtio_xstats_name_off {
 114         char name[RTE_ETH_XSTATS_NAME_SIZE];
 115         unsigned offset;
 116 };
 117
 118 /* [rt]x_qX_ is prepended to the name string here */
 119 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 120         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 121         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 122         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 123         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 124         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 125         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 126         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 127         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 128         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 129         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 130         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 131         {"size_1024_1517_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 132         {"size_1518_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 133 };
 134
 135 /* [rt]x_qX_ is prepended to the name string here */
 136 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 137         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 138         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 139         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 140         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 141         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 142         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 143         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 144         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 145         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 146         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 147         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 148         {"size_1024_1517_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 149         {"size_1518_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 150 };
 151
 152 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 153                             sizeof(rte_virtio_rxq_stat_strings[0]))
 154 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 155                             sizeof(rte_virtio_txq_stat_strings[0]))
 156
 157 static int
 158 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 159                 int *dlen, int pkt_num)
 160 {
 161         uint32_t head, i;
 162         int k, sum = 0;
 163         virtio_net_ctrl_ack status = ~0;
 164         struct virtio_pmd_ctrl result;
 165         struct virtqueue *vq;
 166
 167         ctrl->status = status;
 168
 169         if (!cvq && !cvq->vq) {
 170                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 171                 return -1;
 172         }
 173         vq = cvq->vq;
 174         head = vq->vq_desc_head_idx;
 175
 176         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 177                 "vq->hw->cvq = %p vq = %p",
 178                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 179
 180         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 181                 return -1;
 182
 183         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 184                 sizeof(struct virtio_pmd_ctrl));
 185
 186         /*
 187          * Format is enforced in qemu code:
 188          * One TX packet for header;
 189          * At least one TX packet per argument;
 190          * One RX packet for ACK.
 191          */
 192         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 193         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 194         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 195         vq->vq_free_cnt--;
 196         i = vq->vq_ring.desc[head].next;
 197
 198         for (k = 0; k < pkt_num; k++) {
 199                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 200                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 201                         + sizeof(struct virtio_net_ctrl_hdr)
 202                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 203                 vq->vq_ring.desc[i].len = dlen[k];
 204                 sum += dlen[k];
 205                 vq->vq_free_cnt--;
 206                 i = vq->vq_ring.desc[i].next;
 207         }
 208
 209         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 210         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 211                         + sizeof(struct virtio_net_ctrl_hdr);
 212         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 213         vq->vq_free_cnt--;
 214
 215         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 216
 217         vq_update_avail_ring(vq, head);
 218         vq_update_avail_idx(vq);
 219
 220         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 221
 222         virtqueue_notify(vq);
 223
 224         rte_rmb();
 225         while (VIRTQUEUE_NUSED(vq) == 0) {
 226                 rte_rmb();
 227                 usleep(100);
 228         }
 229
 230         while (VIRTQUEUE_NUSED(vq)) {
 231                 uint32_t idx, desc_idx, used_idx;
 232                 struct vring_used_elem *uep;
 233
 234                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 235                                 & (vq->vq_nentries - 1));
 236                 uep = &vq->vq_ring.used->ring[used_idx];
 237                 idx = (uint32_t) uep->id;
 238                 desc_idx = idx;
 239
 240                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 241                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 242                         vq->vq_free_cnt++;
 243                 }
 244
 245                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 246                 vq->vq_desc_head_idx = idx;
 247
 248                 vq->vq_used_cons_idx++;
 249                 vq->vq_free_cnt++;
 250         }
 251
 252         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 253                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 254
 255         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 256                         sizeof(struct virtio_pmd_ctrl));
 257
 258         return result.status;
 259 }
 260
 261 static int
 262 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 263 {
 264         struct virtio_hw *hw = dev->data->dev_private;
 265         struct virtio_pmd_ctrl ctrl;
 266         int dlen[1];
 267         int ret;
 268
 269         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 270         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 271         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 272
 273         dlen[0] = sizeof(uint16_t);
 274
 275         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 276         if (ret) {
 277                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 278                           "failed, this is too late now...");
 279                 return -EINVAL;
 280         }
 281
 282         return 0;
 283 }
 284
 285 void
 286 virtio_dev_queue_release(struct virtqueue *vq)
 287 {
 288         struct virtio_hw *hw;
 289
 290         if (vq) {
 291                 hw = vq->hw;
 292                 if (vq->configured)
 293                         hw->vtpci_ops->del_queue(hw, vq);
 294
 295                 rte_free(vq->sw_ring);
 296                 rte_free(vq);
 297         }
 298 }
 299
 300 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 301                         int queue_type,
 302                         uint16_t queue_idx,
 303                         uint16_t vtpci_queue_idx,
 304                         uint16_t nb_desc,
 305                         unsigned int socket_id,
 306                         void **pvq)
 307 {
 308         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 309         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 310         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 311         unsigned int vq_size, size;
 312         struct virtio_hw *hw = dev->data->dev_private;
 313         struct virtnet_rx *rxvq = NULL;
 314         struct virtnet_tx *txvq = NULL;
 315         struct virtnet_ctl *cvq = NULL;
 316         struct virtqueue *vq;
 317         const char *queue_names[] = {"rvq", "txq", "cvq"};
 318         size_t sz_vq, sz_q = 0, sz_hdr_mz = 0;
 319         void *sw_ring = NULL;
 320         int ret;
 321
 322         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 323
 324         /*
 325          * Read the virtqueue size from the Queue Size field
 326          * Always power of 2 and if 0 virtqueue does not exist
 327          */
 328         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 329         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 330         if (vq_size == 0) {
 331                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 332                 return -EINVAL;
 333         }
 334
 335         if (!rte_is_power_of_2(vq_size)) {
 336                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 337                 return -EINVAL;
 338         }
 339
 340         snprintf(vq_name, sizeof(vq_name), "port%d_%s%d",
 341                  dev->data->port_id, queue_names[queue_type], queue_idx);
 342
 343         sz_vq = RTE_ALIGN_CEIL(sizeof(*vq) +
 344                                 vq_size * sizeof(struct vq_desc_extra),
 345                                 RTE_CACHE_LINE_SIZE);
 346         if (queue_type == VTNET_RQ) {
 347                 sz_q = sz_vq + sizeof(*rxvq);
 348         } else if (queue_type == VTNET_TQ) {
 349                 sz_q = sz_vq + sizeof(*txvq);
 350                 /*
 351                  * For each xmit packet, allocate a virtio_net_hdr
 352                  * and indirect ring elements
 353                  */
 354                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 355         } else if (queue_type == VTNET_CQ) {
 356                 sz_q = sz_vq + sizeof(*cvq);
 357                 /* Allocate a page for control vq command, data and status */
 358                 sz_hdr_mz = PAGE_SIZE;
 359         }
 360
 361         vq = rte_zmalloc_socket(vq_name, sz_q, RTE_CACHE_LINE_SIZE, socket_id);
 362         if (vq == NULL) {
 363                 PMD_INIT_LOG(ERR, "can not allocate vq");
 364                 return -ENOMEM;
 365         }
 366         vq->hw = hw;
 367         vq->vq_queue_index = vtpci_queue_idx;
 368         vq->vq_nentries = vq_size;
 369
 370         if (nb_desc == 0 || nb_desc > vq_size)
 371                 nb_desc = vq_size;
 372         vq->vq_free_cnt = nb_desc;
 373
 374         /*
 375          * Reserve a memzone for vring elements
 376          */
 377         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 378         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 379         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 380                      size, vq->vq_ring_size);
 381
 382         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, socket_id,
 383                                          0, VIRTIO_PCI_VRING_ALIGN);
 384         if (mz == NULL) {
 385                 if (rte_errno == EEXIST)
 386                         mz = rte_memzone_lookup(vq_name);
 387                 if (mz == NULL) {
 388                         ret = -ENOMEM;
 389                         goto fail_q_alloc;
 390                 }
 391         }
 392
 393         memset(mz->addr, 0, sizeof(mz->len));
 394
 395         vq->vq_ring_mem = mz->phys_addr;
 396         vq->vq_ring_virt_mem = mz->addr;
 397         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 398                      (uint64_t)mz->phys_addr);
 399         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 400                      (uint64_t)(uintptr_t)mz->addr);
 401
 402         if (sz_hdr_mz) {
 403                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_%s%d_hdr",
 404                          dev->data->port_id, queue_names[queue_type],
 405                          queue_idx);
 406                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 407                                                      socket_id, 0,
 408                                                      RTE_CACHE_LINE_SIZE);
 409                 if (hdr_mz == NULL) {
 410                         if (rte_errno == EEXIST)
 411                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 412                         if (hdr_mz == NULL) {
 413                                 ret = -ENOMEM;
 414                                 goto fail_q_alloc;
 415                         }
 416                 }
 417         }
 418
 419         if (queue_type == VTNET_RQ) {
 420                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 421                                sizeof(vq->sw_ring[0]);
 422
 423                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 424                                              RTE_CACHE_LINE_SIZE, socket_id);
 425                 if (!sw_ring) {
 426                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 427                         ret = -ENOMEM;
 428                         goto fail_q_alloc;
 429                 }
 430
 431                 vq->sw_ring = sw_ring;
 432                 rxvq = (struct virtnet_rx *)RTE_PTR_ADD(vq, sz_vq);
 433                 rxvq->vq = vq;
 434                 rxvq->port_id = dev->data->port_id;
 435                 rxvq->queue_id = queue_idx;
 436                 rxvq->mz = mz;
 437                 *pvq = rxvq;
 438         } else if (queue_type == VTNET_TQ) {
 439                 txvq = (struct virtnet_tx *)RTE_PTR_ADD(vq, sz_vq);
 440                 txvq->vq = vq;
 441                 txvq->port_id = dev->data->port_id;
 442                 txvq->queue_id = queue_idx;
 443                 txvq->mz = mz;
 444                 txvq->virtio_net_hdr_mz = hdr_mz;
 445                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 446
 447                 *pvq = txvq;
 448         } else if (queue_type == VTNET_CQ) {
 449                 cvq = (struct virtnet_ctl *)RTE_PTR_ADD(vq, sz_vq);
 450                 cvq->vq = vq;
 451                 cvq->mz = mz;
 452                 cvq->virtio_net_hdr_mz = hdr_mz;
 453                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 454                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 455                 *pvq = cvq;
 456         }
 457
 458         /* For virtio-user case (that is when dev->pci_dev is NULL), we use
 459          * virtual address. And we need properly set _offset_, please see
 460          * MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 461          */
 462         if (dev->pci_dev)
 463                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 464         else {
 465                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 466                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 467                 if (queue_type == VTNET_TQ)
 468                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 469                 else if (queue_type == VTNET_CQ)
 470                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 471         }
 472
 473         if (queue_type == VTNET_TQ) {
 474                 struct virtio_tx_region *txr;
 475                 unsigned int i;
 476
 477                 txr = hdr_mz->addr;
 478                 memset(txr, 0, vq_size * sizeof(*txr));
 479                 for (i = 0; i < vq_size; i++) {
 480                         struct vring_desc *start_dp = txr[i].tx_indir;
 481
 482                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 483
 484                         /* first indirect descriptor is always the tx header */
 485                         start_dp->addr = txvq->virtio_net_hdr_mem
 486                                 + i * sizeof(*txr)
 487                                 + offsetof(struct virtio_tx_region, tx_hdr);
 488
 489                         start_dp->len = hw->vtnet_hdr_size;
 490                         start_dp->flags = VRING_DESC_F_NEXT;
 491                 }
 492         }
 493
 494         if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
 495                 PMD_INIT_LOG(ERR, "setup_queue failed");
 496                 virtio_dev_queue_release(vq);
 497                 return -EINVAL;
 498         }
 499
 500         vq->configured = 1;
 501         return 0;
 502
 503 fail_q_alloc:
 504         rte_free(sw_ring);
 505         rte_memzone_free(hdr_mz);
 506         rte_memzone_free(mz);
 507         rte_free(vq);
 508
 509         return ret;
 510 }
 511
 512 static int
 513 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 514                 uint32_t socket_id)
 515 {
 516         struct virtnet_ctl *cvq;
 517         int ret;
 518         struct virtio_hw *hw = dev->data->dev_private;
 519
 520         PMD_INIT_FUNC_TRACE();
 521         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 522                         vtpci_queue_idx, 0, socket_id, (void **)&cvq);
 523         if (ret < 0) {
 524                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 525                 return ret;
 526         }
 527
 528         hw->cvq = cvq;
 529         return 0;
 530 }
 531
 532 static void
 533 virtio_free_queues(struct rte_eth_dev *dev)
 534 {
 535         unsigned int i;
 536
 537         for (i = 0; i < dev->data->nb_rx_queues; i++)
 538                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 539
 540         dev->data->nb_rx_queues = 0;
 541
 542         for (i = 0; i < dev->data->nb_tx_queues; i++)
 543                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 544
 545         dev->data->nb_tx_queues = 0;
 546 }
 547
 548 static void
 549 virtio_dev_close(struct rte_eth_dev *dev)
 550 {
 551         struct virtio_hw *hw = dev->data->dev_private;
 552
 553         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 554
 555         if (hw->started == 1)
 556                 virtio_dev_stop(dev);
 557
 558         /* reset the NIC */
 559         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 560                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 561         vtpci_reset(hw);
 562         virtio_dev_free_mbufs(dev);
 563         virtio_free_queues(dev);
 564 }
 565
 566 static void
 567 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 568 {
 569         struct virtio_hw *hw = dev->data->dev_private;
 570         struct virtio_pmd_ctrl ctrl;
 571         int dlen[1];
 572         int ret;
 573
 574         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 575                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 576                 return;
 577         }
 578
 579         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 580         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 581         ctrl.data[0] = 1;
 582         dlen[0] = 1;
 583
 584         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 585         if (ret)
 586                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 587 }
 588
 589 static void
 590 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 591 {
 592         struct virtio_hw *hw = dev->data->dev_private;
 593         struct virtio_pmd_ctrl ctrl;
 594         int dlen[1];
 595         int ret;
 596
 597         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 598                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 599                 return;
 600         }
 601
 602         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 603         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 604         ctrl.data[0] = 0;
 605         dlen[0] = 1;
 606
 607         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 608         if (ret)
 609                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 610 }
 611
 612 static void
 613 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 614 {
 615         struct virtio_hw *hw = dev->data->dev_private;
 616         struct virtio_pmd_ctrl ctrl;
 617         int dlen[1];
 618         int ret;
 619
 620         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 621                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 622                 return;
 623         }
 624
 625         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 626         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 627         ctrl.data[0] = 1;
 628         dlen[0] = 1;
 629
 630         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 631         if (ret)
 632                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 633 }
 634
 635 static void
 636 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 637 {
 638         struct virtio_hw *hw = dev->data->dev_private;
 639         struct virtio_pmd_ctrl ctrl;
 640         int dlen[1];
 641         int ret;
 642
 643         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 644                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 645                 return;
 646         }
 647
 648         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 649         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 650         ctrl.data[0] = 0;
 651         dlen[0] = 1;
 652
 653         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 654         if (ret)
 655                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 656 }
 657
 658 /*
 659  * dev_ops for virtio, bare necessities for basic operation
 660  */
 661 static const struct eth_dev_ops virtio_eth_dev_ops = {
 662         .dev_configure           = virtio_dev_configure,
 663         .dev_start               = virtio_dev_start,
 664         .dev_stop                = virtio_dev_stop,
 665         .dev_close               = virtio_dev_close,
 666         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 667         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 668         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 669         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 670
 671         .dev_infos_get           = virtio_dev_info_get,
 672         .stats_get               = virtio_dev_stats_get,
 673         .xstats_get              = virtio_dev_xstats_get,
 674         .xstats_get_names        = virtio_dev_xstats_get_names,
 675         .stats_reset             = virtio_dev_stats_reset,
 676         .xstats_reset            = virtio_dev_stats_reset,
 677         .link_update             = virtio_dev_link_update,
 678         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 679         .rx_queue_release        = virtio_dev_rx_queue_release,
 680         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 681         .tx_queue_release        = virtio_dev_tx_queue_release,
 682         /* collect stats per queue */
 683         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 684         .vlan_filter_set         = virtio_vlan_filter_set,
 685         .mac_addr_add            = virtio_mac_addr_add,
 686         .mac_addr_remove         = virtio_mac_addr_remove,
 687         .mac_addr_set            = virtio_mac_addr_set,
 688 };
 689
 690 static inline int
 691 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 692                                 struct rte_eth_link *link)
 693 {
 694         struct rte_eth_link *dst = link;
 695         struct rte_eth_link *src = &(dev->data->dev_link);
 696
 697         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 698                         *(uint64_t *)src) == 0)
 699                 return -1;
 700
 701         return 0;
 702 }
 703
 704 /**
 705  * Atomically writes the link status information into global
 706  * structure rte_eth_dev.
 707  *
 708  * @param dev
 709  *   - Pointer to the structure rte_eth_dev to read from.
 710  *   - Pointer to the buffer to be saved with the link status.
 711  *
 712  * @return
 713  *   - On success, zero.
 714  *   - On failure, negative value.
 715  */
 716 static inline int
 717 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 718                 struct rte_eth_link *link)
 719 {
 720         struct rte_eth_link *dst = &(dev->data->dev_link);
 721         struct rte_eth_link *src = link;
 722
 723         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 724                                         *(uint64_t *)src) == 0)
 725                 return -1;
 726
 727         return 0;
 728 }
 729
 730 static void
 731 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 732 {
 733         unsigned i;
 734
 735         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 736                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 737                 if (txvq == NULL)
 738                         continue;
 739
 740                 stats->opackets += txvq->stats.packets;
 741                 stats->obytes += txvq->stats.bytes;
 742                 stats->oerrors += txvq->stats.errors;
 743
 744                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 745                         stats->q_opackets[i] = txvq->stats.packets;
 746                         stats->q_obytes[i] = txvq->stats.bytes;
 747                 }
 748         }
 749
 750         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 751                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 752                 if (rxvq == NULL)
 753                         continue;
 754
 755                 stats->ipackets += rxvq->stats.packets;
 756                 stats->ibytes += rxvq->stats.bytes;
 757                 stats->ierrors += rxvq->stats.errors;
 758
 759                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 760                         stats->q_ipackets[i] = rxvq->stats.packets;
 761                         stats->q_ibytes[i] = rxvq->stats.bytes;
 762                 }
 763         }
 764
 765         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 766 }
 767
 768 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 769                                        struct rte_eth_xstat_name *xstats_names,
 770                                        __rte_unused unsigned limit)
 771 {
 772         unsigned i;
 773         unsigned count = 0;
 774         unsigned t;
 775
 776         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 777                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 778
 779         if (xstats_names != NULL) {
 780                 /* Note: limit checked in rte_eth_xstats_names() */
 781
 782                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 783                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 784                         if (rxvq == NULL)
 785                                 continue;
 786                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 787                                 snprintf(xstats_names[count].name,
 788                                         sizeof(xstats_names[count].name),
 789                                         "rx_q%u_%s", i,
 790                                         rte_virtio_rxq_stat_strings[t].name);
 791                                 count++;
 792                         }
 793                 }
 794
 795                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 796                         struct virtqueue *txvq = dev->data->tx_queues[i];
 797                         if (txvq == NULL)
 798                                 continue;
 799                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 800                                 snprintf(xstats_names[count].name,
 801                                         sizeof(xstats_names[count].name),
 802                                         "tx_q%u_%s", i,
 803                                         rte_virtio_txq_stat_strings[t].name);
 804                                 count++;
 805                         }
 806                 }
 807                 return count;
 808         }
 809         return nstats;
 810 }
 811
 812 static int
 813 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 814                       unsigned n)
 815 {
 816         unsigned i;
 817         unsigned count = 0;
 818
 819         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 820                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 821
 822         if (n < nstats)
 823                 return nstats;
 824
 825         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 826                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 827
 828                 if (rxvq == NULL)
 829                         continue;
 830
 831                 unsigned t;
 832
 833                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 834                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 835                                 rte_virtio_rxq_stat_strings[t].offset);
 836                         count++;
 837                 }
 838         }
 839
 840         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 841                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 842
 843                 if (txvq == NULL)
 844                         continue;
 845
 846                 unsigned t;
 847
 848                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 849                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 850                                 rte_virtio_txq_stat_strings[t].offset);
 851                         count++;
 852                 }
 853         }
 854
 855         return count;
 856 }
 857
 858 static void
 859 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 860 {
 861         virtio_update_stats(dev, stats);
 862 }
 863
 864 static void
 865 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 866 {
 867         unsigned int i;
 868
 869         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 870                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 871                 if (txvq == NULL)
 872                         continue;
 873
 874                 txvq->stats.packets = 0;
 875                 txvq->stats.bytes = 0;
 876                 txvq->stats.errors = 0;
 877                 txvq->stats.multicast = 0;
 878                 txvq->stats.broadcast = 0;
 879                 memset(txvq->stats.size_bins, 0,
 880                        sizeof(txvq->stats.size_bins[0]) * 8);
 881         }
 882
 883         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 884                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 885                 if (rxvq == NULL)
 886                         continue;
 887
 888                 rxvq->stats.packets = 0;
 889                 rxvq->stats.bytes = 0;
 890                 rxvq->stats.errors = 0;
 891                 rxvq->stats.multicast = 0;
 892                 rxvq->stats.broadcast = 0;
 893                 memset(rxvq->stats.size_bins, 0,
 894                        sizeof(rxvq->stats.size_bins[0]) * 8);
 895         }
 896 }
 897
 898 static void
 899 virtio_set_hwaddr(struct virtio_hw *hw)
 900 {
 901         vtpci_write_dev_config(hw,
 902                         offsetof(struct virtio_net_config, mac),
 903                         &hw->mac_addr, ETHER_ADDR_LEN);
 904 }
 905
 906 static void
 907 virtio_get_hwaddr(struct virtio_hw *hw)
 908 {
 909         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 910                 vtpci_read_dev_config(hw,
 911                         offsetof(struct virtio_net_config, mac),
 912                         &hw->mac_addr, ETHER_ADDR_LEN);
 913         } else {
 914                 eth_random_addr(&hw->mac_addr[0]);
 915                 virtio_set_hwaddr(hw);
 916         }
 917 }
 918
 919 static void
 920 virtio_mac_table_set(struct virtio_hw *hw,
 921                      const struct virtio_net_ctrl_mac *uc,
 922                      const struct virtio_net_ctrl_mac *mc)
 923 {
 924         struct virtio_pmd_ctrl ctrl;
 925         int err, len[2];
 926
 927         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 928                 PMD_DRV_LOG(INFO, "host does not support mac table");
 929                 return;
 930         }
 931
 932         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 933         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 934
 935         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 936         memcpy(ctrl.data, uc, len[0]);
 937
 938         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 939         memcpy(ctrl.data + len[0], mc, len[1]);
 940
 941         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 942         if (err != 0)
 943                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 944 }
 945
 946 static void
 947 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 948                     uint32_t index, uint32_t vmdq __rte_unused)
 949 {
 950         struct virtio_hw *hw = dev->data->dev_private;
 951         const struct ether_addr *addrs = dev->data->mac_addrs;
 952         unsigned int i;
 953         struct virtio_net_ctrl_mac *uc, *mc;
 954
 955         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 956                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 957                 return;
 958         }
 959
 960         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 961         uc->entries = 0;
 962         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 963         mc->entries = 0;
 964
 965         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 966                 const struct ether_addr *addr
 967                         = (i == index) ? mac_addr : addrs + i;
 968                 struct virtio_net_ctrl_mac *tbl
 969                         = is_multicast_ether_addr(addr) ? mc : uc;
 970
 971                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 972         }
 973
 974         virtio_mac_table_set(hw, uc, mc);
 975 }
 976
 977 static void
 978 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 979 {
 980         struct virtio_hw *hw = dev->data->dev_private;
 981         struct ether_addr *addrs = dev->data->mac_addrs;
 982         struct virtio_net_ctrl_mac *uc, *mc;
 983         unsigned int i;
 984
 985         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 986                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 987                 return;
 988         }
 989
 990         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 991         uc->entries = 0;
 992         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 993         mc->entries = 0;
 994
 995         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 996                 struct virtio_net_ctrl_mac *tbl;
 997
 998                 if (i == index || is_zero_ether_addr(addrs + i))
 999                         continue;
1000
1001                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1002                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1003         }
1004
1005         virtio_mac_table_set(hw, uc, mc);
1006 }
1007
1008 static void
1009 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1010 {
1011         struct virtio_hw *hw = dev->data->dev_private;
1012
1013         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1014
1015         /* Use atomic update if available */
1016         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1017                 struct virtio_pmd_ctrl ctrl;
1018                 int len = ETHER_ADDR_LEN;
1019
1020                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1021                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1022
1023                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1024                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1025         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1026                 virtio_set_hwaddr(hw);
1027 }
1028
1029 static int
1030 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1031 {
1032         struct virtio_hw *hw = dev->data->dev_private;
1033         struct virtio_pmd_ctrl ctrl;
1034         int len;
1035
1036         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1037                 return -ENOTSUP;
1038
1039         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1040         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1041         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1042         len = sizeof(vlan_id);
1043
1044         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1045 }
1046
1047 static int
1048 virtio_negotiate_features(struct virtio_hw *hw)
1049 {
1050         uint64_t host_features;
1051
1052         /* Prepare guest_features: feature that driver wants to support */
1053         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
1054         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1055                 hw->guest_features);
1056
1057         /* Read device(host) feature bits */
1058         host_features = hw->vtpci_ops->get_features(hw);
1059         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1060                 host_features);
1061
1062         /*
1063          * Negotiate features: Subset of device feature bits are written back
1064          * guest feature bits.
1065          */
1066         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1067         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1068                 hw->guest_features);
1069
1070         if (hw->modern) {
1071                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1072                         PMD_INIT_LOG(ERR,
1073                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1074                         return -1;
1075                 }
1076                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1077                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1078                         PMD_INIT_LOG(ERR,
1079                                 "failed to set FEATURES_OK status!");
1080                         return -1;
1081                 }
1082         }
1083
1084         return 0;
1085 }
1086
1087 /*
1088  * Process Virtio Config changed interrupt and call the callback
1089  * if link state changed.
1090  */
1091 static void
1092 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1093                          void *param)
1094 {
1095         struct rte_eth_dev *dev = param;
1096         struct virtio_hw *hw = dev->data->dev_private;
1097         uint8_t isr;
1098
1099         /* Read interrupt status which clears interrupt */
1100         isr = vtpci_isr(hw);
1101         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1102
1103         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1104                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1105
1106         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1107                 if (virtio_dev_link_update(dev, 0) == 0)
1108                         _rte_eth_dev_callback_process(dev,
1109                                                       RTE_ETH_EVENT_INTR_LSC);
1110         }
1111
1112 }
1113
1114 static void
1115 rx_func_get(struct rte_eth_dev *eth_dev)
1116 {
1117         struct virtio_hw *hw = eth_dev->data->dev_private;
1118         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1119                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1120         else
1121                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1122 }
1123
1124 /*
1125  * This function is based on probe() function in virtio_pci.c
1126  * It returns 0 on success.
1127  */
1128 int
1129 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1130 {
1131         struct virtio_hw *hw = eth_dev->data->dev_private;
1132         struct virtio_net_config *config;
1133         struct virtio_net_config local_config;
1134         struct rte_pci_device *pci_dev;
1135         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1136         int ret;
1137
1138         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1139
1140         eth_dev->dev_ops = &virtio_eth_dev_ops;
1141         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1142
1143         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1144                 rx_func_get(eth_dev);
1145                 return 0;
1146         }
1147
1148         /* Allocate memory for storing MAC addresses */
1149         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1150         if (eth_dev->data->mac_addrs == NULL) {
1151                 PMD_INIT_LOG(ERR,
1152                         "Failed to allocate %d bytes needed to store MAC addresses",
1153                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1154                 return -ENOMEM;
1155         }
1156
1157         pci_dev = eth_dev->pci_dev;
1158
1159         if (pci_dev) {
1160                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1161                 if (ret)
1162                         return ret;
1163         }
1164
1165         /* Reset the device although not necessary at startup */
1166         vtpci_reset(hw);
1167
1168         /* Tell the host we've noticed this device. */
1169         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1170
1171         /* Tell the host we've known how to drive the device. */
1172         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1173         if (virtio_negotiate_features(hw) < 0)
1174                 return -1;
1175
1176         /* If host does not support status then disable LSC */
1177         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1178                 dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1179
1180         rte_eth_copy_pci_info(eth_dev, pci_dev);
1181         eth_dev->data->dev_flags = dev_flags;
1182
1183         rx_func_get(eth_dev);
1184
1185         /* Setting up rx_header size for the device */
1186         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1187             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1188                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1189         else
1190                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1191
1192         /* Copy the permanent MAC address to: virtio_hw */
1193         virtio_get_hwaddr(hw);
1194         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1195                         &eth_dev->data->mac_addrs[0]);
1196         PMD_INIT_LOG(DEBUG,
1197                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1198                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1199                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1200
1201         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1202                 config = &local_config;
1203
1204                 vtpci_read_dev_config(hw,
1205                         offsetof(struct virtio_net_config, mac),
1206                         &config->mac, sizeof(config->mac));
1207
1208                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1209                         vtpci_read_dev_config(hw,
1210                                 offsetof(struct virtio_net_config, status),
1211                                 &config->status, sizeof(config->status));
1212                 } else {
1213                         PMD_INIT_LOG(DEBUG,
1214                                      "VIRTIO_NET_F_STATUS is not supported");
1215                         config->status = 0;
1216                 }
1217
1218                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1219                         vtpci_read_dev_config(hw,
1220                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1221                                 &config->max_virtqueue_pairs,
1222                                 sizeof(config->max_virtqueue_pairs));
1223                 } else {
1224                         PMD_INIT_LOG(DEBUG,
1225                                      "VIRTIO_NET_F_MQ is not supported");
1226                         config->max_virtqueue_pairs = 1;
1227                 }
1228
1229                 hw->max_rx_queues =
1230                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1231                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1232                 hw->max_tx_queues =
1233                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1234                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1235
1236                 virtio_dev_cq_queue_setup(eth_dev,
1237                                         config->max_virtqueue_pairs * 2,
1238                                         SOCKET_ID_ANY);
1239
1240                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1241                                 config->max_virtqueue_pairs);
1242                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1243                 PMD_INIT_LOG(DEBUG,
1244                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1245                                 config->mac[0], config->mac[1],
1246                                 config->mac[2], config->mac[3],
1247                                 config->mac[4], config->mac[5]);
1248         } else {
1249                 hw->max_rx_queues = 1;
1250                 hw->max_tx_queues = 1;
1251         }
1252
1253         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1254                         hw->max_rx_queues, hw->max_tx_queues);
1255         if (pci_dev)
1256                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1257                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1258                         pci_dev->id.device_id);
1259
1260         /* Setup interrupt callback  */
1261         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1262                 rte_intr_callback_register(&pci_dev->intr_handle,
1263                                    virtio_interrupt_handler, eth_dev);
1264
1265         virtio_dev_cq_start(eth_dev);
1266
1267         return 0;
1268 }
1269
1270 static int
1271 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1272 {
1273         struct rte_pci_device *pci_dev;
1274         struct virtio_hw *hw = eth_dev->data->dev_private;
1275
1276         PMD_INIT_FUNC_TRACE();
1277
1278         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1279                 return -EPERM;
1280
1281         /* Close it anyway since there's no way to know if closed */
1282         virtio_dev_close(eth_dev);
1283
1284         pci_dev = eth_dev->pci_dev;
1285
1286         eth_dev->dev_ops = NULL;
1287         eth_dev->tx_pkt_burst = NULL;
1288         eth_dev->rx_pkt_burst = NULL;
1289
1290         if (hw->cvq)
1291                 virtio_dev_queue_release(hw->cvq->vq);
1292
1293         rte_free(eth_dev->data->mac_addrs);
1294         eth_dev->data->mac_addrs = NULL;
1295
1296         /* reset interrupt callback  */
1297         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1298                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1299                                                 virtio_interrupt_handler,
1300                                                 eth_dev);
1301         rte_eal_pci_unmap_device(pci_dev);
1302
1303         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1304
1305         return 0;
1306 }
1307
1308 static struct eth_driver rte_virtio_pmd = {
1309         .pci_drv = {
1310                 .name = "rte_virtio_pmd",
1311                 .id_table = pci_id_virtio_map,
1312                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1313         },
1314         .eth_dev_init = eth_virtio_dev_init,
1315         .eth_dev_uninit = eth_virtio_dev_uninit,
1316         .dev_private_size = sizeof(struct virtio_hw),
1317 };
1318
1319 /*
1320  * Driver initialization routine.
1321  * Invoked once at EAL init time.
1322  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1323  * Returns 0 on success.
1324  */
1325 static int
1326 rte_virtio_pmd_init(const char *name __rte_unused,
1327                     const char *param __rte_unused)
1328 {
1329         if (rte_eal_iopl_init() != 0) {
1330                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1331                 return -1;
1332         }
1333
1334         rte_eth_driver_register(&rte_virtio_pmd);
1335         return 0;
1336 }
1337
1338 /*
1339  * Configure virtio device
1340  * It returns 0 on success.
1341  */
1342 static int
1343 virtio_dev_configure(struct rte_eth_dev *dev)
1344 {
1345         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1346         struct virtio_hw *hw = dev->data->dev_private;
1347
1348         PMD_INIT_LOG(DEBUG, "configure");
1349
1350         if (rxmode->hw_ip_checksum) {
1351                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1352                 return -EINVAL;
1353         }
1354
1355         hw->vlan_strip = rxmode->hw_vlan_strip;
1356
1357         if (rxmode->hw_vlan_filter
1358             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1359                 PMD_DRV_LOG(NOTICE,
1360                             "vlan filtering not available on this host");
1361                 return -ENOTSUP;
1362         }
1363
1364         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1365                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1366                         PMD_DRV_LOG(ERR, "failed to set config vector");
1367                         return -EBUSY;
1368                 }
1369
1370         return 0;
1371 }
1372
1373
1374 static int
1375 virtio_dev_start(struct rte_eth_dev *dev)
1376 {
1377         uint16_t nb_queues, i;
1378         struct virtio_hw *hw = dev->data->dev_private;
1379         struct virtnet_rx *rxvq;
1380         struct virtnet_tx *txvq __rte_unused;
1381
1382         /* check if lsc interrupt feature is enabled */
1383         if (dev->data->dev_conf.intr_conf.lsc) {
1384                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1385                         PMD_DRV_LOG(ERR, "link status not supported by host");
1386                         return -ENOTSUP;
1387                 }
1388
1389                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1390                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1391                         return -EIO;
1392                 }
1393         }
1394
1395         /* Initialize Link state */
1396         virtio_dev_link_update(dev, 0);
1397
1398         /* On restart after stop do not touch queues */
1399         if (hw->started)
1400                 return 0;
1401
1402         /* Do final configuration before rx/tx engine starts */
1403         virtio_dev_rxtx_start(dev);
1404         vtpci_reinit_complete(hw);
1405
1406         hw->started = 1;
1407
1408         /*Notify the backend
1409          *Otherwise the tap backend might already stop its queue due to fullness.
1410          *vhost backend will have no chance to be waked up
1411          */
1412         nb_queues = dev->data->nb_rx_queues;
1413         if (nb_queues > 1) {
1414                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1415                         return -EINVAL;
1416         }
1417
1418         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1419
1420         for (i = 0; i < nb_queues; i++) {
1421                 rxvq = dev->data->rx_queues[i];
1422                 virtqueue_notify(rxvq->vq);
1423         }
1424
1425         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1426
1427         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1428                 rxvq = dev->data->rx_queues[i];
1429                 VIRTQUEUE_DUMP(rxvq->vq);
1430         }
1431
1432         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1433                 txvq = dev->data->tx_queues[i];
1434                 VIRTQUEUE_DUMP(txvq->vq);
1435         }
1436
1437         return 0;
1438 }
1439
1440 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1441 {
1442         struct rte_mbuf *buf;
1443         int i, mbuf_num = 0;
1444
1445         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1446                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1447
1448                 PMD_INIT_LOG(DEBUG,
1449                              "Before freeing rxq[%d] used and unused buf", i);
1450                 VIRTQUEUE_DUMP(rxvq->vq);
1451
1452                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1453                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1454                         rte_pktmbuf_free(buf);
1455                         mbuf_num++;
1456                 }
1457
1458                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1459                 PMD_INIT_LOG(DEBUG,
1460                              "After freeing rxq[%d] used and unused buf", i);
1461                 VIRTQUEUE_DUMP(rxvq->vq);
1462         }
1463
1464         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1465                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1466
1467                 PMD_INIT_LOG(DEBUG,
1468                              "Before freeing txq[%d] used and unused bufs",
1469                              i);
1470                 VIRTQUEUE_DUMP(txvq->vq);
1471
1472                 mbuf_num = 0;
1473                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1474                         rte_pktmbuf_free(buf);
1475                         mbuf_num++;
1476                 }
1477
1478                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1479                 PMD_INIT_LOG(DEBUG,
1480                              "After freeing txq[%d] used and unused buf", i);
1481                 VIRTQUEUE_DUMP(txvq->vq);
1482         }
1483 }
1484
1485 /*
1486  * Stop device: disable interrupt and mark link down
1487  */
1488 static void
1489 virtio_dev_stop(struct rte_eth_dev *dev)
1490 {
1491         struct rte_eth_link link;
1492         struct virtio_hw *hw = dev->data->dev_private;
1493
1494         PMD_INIT_LOG(DEBUG, "stop");
1495
1496         hw->started = 0;
1497
1498         if (dev->data->dev_conf.intr_conf.lsc)
1499                 rte_intr_disable(&dev->pci_dev->intr_handle);
1500
1501         memset(&link, 0, sizeof(link));
1502         virtio_dev_atomic_write_link_status(dev, &link);
1503 }
1504
1505 static int
1506 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1507 {
1508         struct rte_eth_link link, old;
1509         uint16_t status;
1510         struct virtio_hw *hw = dev->data->dev_private;
1511         memset(&link, 0, sizeof(link));
1512         virtio_dev_atomic_read_link_status(dev, &link);
1513         old = link;
1514         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1515         link.link_speed  = SPEED_10G;
1516
1517         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1518                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1519                 vtpci_read_dev_config(hw,
1520                                 offsetof(struct virtio_net_config, status),
1521                                 &status, sizeof(status));
1522                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1523                         link.link_status = ETH_LINK_DOWN;
1524                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1525                                      dev->data->port_id);
1526                 } else {
1527                         link.link_status = ETH_LINK_UP;
1528                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1529                                      dev->data->port_id);
1530                 }
1531         } else {
1532                 link.link_status = ETH_LINK_UP;
1533         }
1534         virtio_dev_atomic_write_link_status(dev, &link);
1535
1536         return (old.link_status == link.link_status) ? -1 : 0;
1537 }
1538
1539 static void
1540 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1541 {
1542         struct virtio_hw *hw = dev->data->dev_private;
1543
1544         if (dev->pci_dev)
1545                 dev_info->driver_name = dev->driver->pci_drv.name;
1546         else
1547                 dev_info->driver_name = "virtio-user PMD";
1548         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1549         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1550         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1551         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1552         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1553         dev_info->default_txconf = (struct rte_eth_txconf) {
1554                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1555         };
1556 }
1557
1558 /*
1559  * It enables testpmd to collect per queue stats.
1560  */
1561 static int
1562 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1563 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1564 __rte_unused uint8_t is_rx)
1565 {
1566         return 0;
1567 }
1568
1569 static struct rte_driver rte_virtio_driver = {
1570         .type = PMD_PDEV,
1571         .init = rte_virtio_pmd_init,
1572 };
1573
1574 PMD_REGISTER_DRIVER(rte_virtio_driver);