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                                 xstats_names[count].id = count;
 792                                 count++;
 793                         }
 794                 }
 795
 796                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 797                         struct virtqueue *txvq = dev->data->tx_queues[i];
 798                         if (txvq == NULL)
 799                                 continue;
 800                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 801                                 snprintf(xstats_names[count].name,
 802                                         sizeof(xstats_names[count].name),
 803                                         "tx_q%u_%s", i,
 804                                         rte_virtio_txq_stat_strings[t].name);
 805                                 xstats_names[count].id = count;
 806                                 count++;
 807                         }
 808                 }
 809                 return count;
 810         }
 811         return nstats;
 812 }
 813
 814 static int
 815 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 816                       unsigned n)
 817 {
 818         unsigned i;
 819         unsigned count = 0;
 820
 821         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 822                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 823
 824         if (n < nstats)
 825                 return nstats;
 826
 827         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 828                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 829
 830                 if (rxvq == NULL)
 831                         continue;
 832
 833                 unsigned t;
 834
 835                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 836                         xstats[count].id = count;
 837                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 838                                 rte_virtio_rxq_stat_strings[t].offset);
 839                         count++;
 840                 }
 841         }
 842
 843         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 844                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 845
 846                 if (txvq == NULL)
 847                         continue;
 848
 849                 unsigned t;
 850
 851                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 852                         xstats[count].id = count;
 853                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 854                                 rte_virtio_txq_stat_strings[t].offset);
 855                         count++;
 856                 }
 857         }
 858
 859         return count;
 860 }
 861
 862 static void
 863 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 864 {
 865         virtio_update_stats(dev, stats);
 866 }
 867
 868 static void
 869 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 870 {
 871         unsigned int i;
 872
 873         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 874                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 875                 if (txvq == NULL)
 876                         continue;
 877
 878                 txvq->stats.packets = 0;
 879                 txvq->stats.bytes = 0;
 880                 txvq->stats.errors = 0;
 881                 txvq->stats.multicast = 0;
 882                 txvq->stats.broadcast = 0;
 883                 memset(txvq->stats.size_bins, 0,
 884                        sizeof(txvq->stats.size_bins[0]) * 8);
 885         }
 886
 887         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 888                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 889                 if (rxvq == NULL)
 890                         continue;
 891
 892                 rxvq->stats.packets = 0;
 893                 rxvq->stats.bytes = 0;
 894                 rxvq->stats.errors = 0;
 895                 rxvq->stats.multicast = 0;
 896                 rxvq->stats.broadcast = 0;
 897                 memset(rxvq->stats.size_bins, 0,
 898                        sizeof(rxvq->stats.size_bins[0]) * 8);
 899         }
 900 }
 901
 902 static void
 903 virtio_set_hwaddr(struct virtio_hw *hw)
 904 {
 905         vtpci_write_dev_config(hw,
 906                         offsetof(struct virtio_net_config, mac),
 907                         &hw->mac_addr, ETHER_ADDR_LEN);
 908 }
 909
 910 static void
 911 virtio_get_hwaddr(struct virtio_hw *hw)
 912 {
 913         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 914                 vtpci_read_dev_config(hw,
 915                         offsetof(struct virtio_net_config, mac),
 916                         &hw->mac_addr, ETHER_ADDR_LEN);
 917         } else {
 918                 eth_random_addr(&hw->mac_addr[0]);
 919                 virtio_set_hwaddr(hw);
 920         }
 921 }
 922
 923 static void
 924 virtio_mac_table_set(struct virtio_hw *hw,
 925                      const struct virtio_net_ctrl_mac *uc,
 926                      const struct virtio_net_ctrl_mac *mc)
 927 {
 928         struct virtio_pmd_ctrl ctrl;
 929         int err, len[2];
 930
 931         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 932                 PMD_DRV_LOG(INFO, "host does not support mac table");
 933                 return;
 934         }
 935
 936         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 937         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 938
 939         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 940         memcpy(ctrl.data, uc, len[0]);
 941
 942         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 943         memcpy(ctrl.data + len[0], mc, len[1]);
 944
 945         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 946         if (err != 0)
 947                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 948 }
 949
 950 static void
 951 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 952                     uint32_t index, uint32_t vmdq __rte_unused)
 953 {
 954         struct virtio_hw *hw = dev->data->dev_private;
 955         const struct ether_addr *addrs = dev->data->mac_addrs;
 956         unsigned int i;
 957         struct virtio_net_ctrl_mac *uc, *mc;
 958
 959         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 960                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 961                 return;
 962         }
 963
 964         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 965         uc->entries = 0;
 966         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 967         mc->entries = 0;
 968
 969         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 970                 const struct ether_addr *addr
 971                         = (i == index) ? mac_addr : addrs + i;
 972                 struct virtio_net_ctrl_mac *tbl
 973                         = is_multicast_ether_addr(addr) ? mc : uc;
 974
 975                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 976         }
 977
 978         virtio_mac_table_set(hw, uc, mc);
 979 }
 980
 981 static void
 982 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 983 {
 984         struct virtio_hw *hw = dev->data->dev_private;
 985         struct ether_addr *addrs = dev->data->mac_addrs;
 986         struct virtio_net_ctrl_mac *uc, *mc;
 987         unsigned int i;
 988
 989         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 990                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 991                 return;
 992         }
 993
 994         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 995         uc->entries = 0;
 996         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 997         mc->entries = 0;
 998
 999         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1000                 struct virtio_net_ctrl_mac *tbl;
1001
1002                 if (i == index || is_zero_ether_addr(addrs + i))
1003                         continue;
1004
1005                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1006                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1007         }
1008
1009         virtio_mac_table_set(hw, uc, mc);
1010 }
1011
1012 static void
1013 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1014 {
1015         struct virtio_hw *hw = dev->data->dev_private;
1016
1017         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1018
1019         /* Use atomic update if available */
1020         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1021                 struct virtio_pmd_ctrl ctrl;
1022                 int len = ETHER_ADDR_LEN;
1023
1024                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1025                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1026
1027                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1028                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1029         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1030                 virtio_set_hwaddr(hw);
1031 }
1032
1033 static int
1034 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1035 {
1036         struct virtio_hw *hw = dev->data->dev_private;
1037         struct virtio_pmd_ctrl ctrl;
1038         int len;
1039
1040         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1041                 return -ENOTSUP;
1042
1043         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1044         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1045         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1046         len = sizeof(vlan_id);
1047
1048         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1049 }
1050
1051 static int
1052 virtio_negotiate_features(struct virtio_hw *hw)
1053 {
1054         uint64_t host_features;
1055
1056         /* Prepare guest_features: feature that driver wants to support */
1057         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
1058         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1059                 hw->guest_features);
1060
1061         /* Read device(host) feature bits */
1062         host_features = hw->vtpci_ops->get_features(hw);
1063         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1064                 host_features);
1065
1066         /*
1067          * Negotiate features: Subset of device feature bits are written back
1068          * guest feature bits.
1069          */
1070         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1071         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1072                 hw->guest_features);
1073
1074         if (hw->modern) {
1075                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1076                         PMD_INIT_LOG(ERR,
1077                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1078                         return -1;
1079                 }
1080                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1081                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1082                         PMD_INIT_LOG(ERR,
1083                                 "failed to set FEATURES_OK status!");
1084                         return -1;
1085                 }
1086         }
1087
1088         return 0;
1089 }
1090
1091 /*
1092  * Process Virtio Config changed interrupt and call the callback
1093  * if link state changed.
1094  */
1095 static void
1096 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1097                          void *param)
1098 {
1099         struct rte_eth_dev *dev = param;
1100         struct virtio_hw *hw = dev->data->dev_private;
1101         uint8_t isr;
1102
1103         /* Read interrupt status which clears interrupt */
1104         isr = vtpci_isr(hw);
1105         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1106
1107         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1108                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1109
1110         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1111                 if (virtio_dev_link_update(dev, 0) == 0)
1112                         _rte_eth_dev_callback_process(dev,
1113                                                       RTE_ETH_EVENT_INTR_LSC);
1114         }
1115
1116 }
1117
1118 static void
1119 rx_func_get(struct rte_eth_dev *eth_dev)
1120 {
1121         struct virtio_hw *hw = eth_dev->data->dev_private;
1122         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1123                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1124         else
1125                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1126 }
1127
1128 /*
1129  * This function is based on probe() function in virtio_pci.c
1130  * It returns 0 on success.
1131  */
1132 int
1133 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1134 {
1135         struct virtio_hw *hw = eth_dev->data->dev_private;
1136         struct virtio_net_config *config;
1137         struct virtio_net_config local_config;
1138         struct rte_pci_device *pci_dev;
1139         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1140         int ret;
1141
1142         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1143
1144         eth_dev->dev_ops = &virtio_eth_dev_ops;
1145         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1146
1147         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1148                 rx_func_get(eth_dev);
1149                 return 0;
1150         }
1151
1152         /* Allocate memory for storing MAC addresses */
1153         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1154         if (eth_dev->data->mac_addrs == NULL) {
1155                 PMD_INIT_LOG(ERR,
1156                         "Failed to allocate %d bytes needed to store MAC addresses",
1157                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1158                 return -ENOMEM;
1159         }
1160
1161         pci_dev = eth_dev->pci_dev;
1162
1163         if (pci_dev) {
1164                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1165                 if (ret)
1166                         return ret;
1167         }
1168
1169         /* Reset the device although not necessary at startup */
1170         vtpci_reset(hw);
1171
1172         /* Tell the host we've noticed this device. */
1173         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1174
1175         /* Tell the host we've known how to drive the device. */
1176         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1177         if (virtio_negotiate_features(hw) < 0)
1178                 return -1;
1179
1180         /* If host does not support status then disable LSC */
1181         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1182                 dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1183
1184         rte_eth_copy_pci_info(eth_dev, pci_dev);
1185         eth_dev->data->dev_flags = dev_flags;
1186
1187         rx_func_get(eth_dev);
1188
1189         /* Setting up rx_header size for the device */
1190         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1191             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1192                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1193         else
1194                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1195
1196         /* Copy the permanent MAC address to: virtio_hw */
1197         virtio_get_hwaddr(hw);
1198         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1199                         &eth_dev->data->mac_addrs[0]);
1200         PMD_INIT_LOG(DEBUG,
1201                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1202                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1203                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1204
1205         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1206                 config = &local_config;
1207
1208                 vtpci_read_dev_config(hw,
1209                         offsetof(struct virtio_net_config, mac),
1210                         &config->mac, sizeof(config->mac));
1211
1212                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1213                         vtpci_read_dev_config(hw,
1214                                 offsetof(struct virtio_net_config, status),
1215                                 &config->status, sizeof(config->status));
1216                 } else {
1217                         PMD_INIT_LOG(DEBUG,
1218                                      "VIRTIO_NET_F_STATUS is not supported");
1219                         config->status = 0;
1220                 }
1221
1222                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1223                         vtpci_read_dev_config(hw,
1224                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1225                                 &config->max_virtqueue_pairs,
1226                                 sizeof(config->max_virtqueue_pairs));
1227                 } else {
1228                         PMD_INIT_LOG(DEBUG,
1229                                      "VIRTIO_NET_F_MQ is not supported");
1230                         config->max_virtqueue_pairs = 1;
1231                 }
1232
1233                 hw->max_rx_queues =
1234                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1235                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1236                 hw->max_tx_queues =
1237                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1238                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1239
1240                 virtio_dev_cq_queue_setup(eth_dev,
1241                                         config->max_virtqueue_pairs * 2,
1242                                         SOCKET_ID_ANY);
1243
1244                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1245                                 config->max_virtqueue_pairs);
1246                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1247                 PMD_INIT_LOG(DEBUG,
1248                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1249                                 config->mac[0], config->mac[1],
1250                                 config->mac[2], config->mac[3],
1251                                 config->mac[4], config->mac[5]);
1252         } else {
1253                 hw->max_rx_queues = 1;
1254                 hw->max_tx_queues = 1;
1255         }
1256
1257         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1258                         hw->max_rx_queues, hw->max_tx_queues);
1259         if (pci_dev)
1260                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1261                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1262                         pci_dev->id.device_id);
1263
1264         /* Setup interrupt callback  */
1265         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1266                 rte_intr_callback_register(&pci_dev->intr_handle,
1267                                    virtio_interrupt_handler, eth_dev);
1268
1269         virtio_dev_cq_start(eth_dev);
1270
1271         return 0;
1272 }
1273
1274 static int
1275 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1276 {
1277         struct rte_pci_device *pci_dev;
1278         struct virtio_hw *hw = eth_dev->data->dev_private;
1279
1280         PMD_INIT_FUNC_TRACE();
1281
1282         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1283                 return -EPERM;
1284
1285         /* Close it anyway since there's no way to know if closed */
1286         virtio_dev_close(eth_dev);
1287
1288         pci_dev = eth_dev->pci_dev;
1289
1290         eth_dev->dev_ops = NULL;
1291         eth_dev->tx_pkt_burst = NULL;
1292         eth_dev->rx_pkt_burst = NULL;
1293
1294         if (hw->cvq)
1295                 virtio_dev_queue_release(hw->cvq->vq);
1296
1297         rte_free(eth_dev->data->mac_addrs);
1298         eth_dev->data->mac_addrs = NULL;
1299
1300         /* reset interrupt callback  */
1301         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1302                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1303                                                 virtio_interrupt_handler,
1304                                                 eth_dev);
1305         rte_eal_pci_unmap_device(pci_dev);
1306
1307         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1308
1309         return 0;
1310 }
1311
1312 static struct eth_driver rte_virtio_pmd = {
1313         .pci_drv = {
1314                 .name = "rte_virtio_pmd",
1315                 .id_table = pci_id_virtio_map,
1316                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1317         },
1318         .eth_dev_init = eth_virtio_dev_init,
1319         .eth_dev_uninit = eth_virtio_dev_uninit,
1320         .dev_private_size = sizeof(struct virtio_hw),
1321 };
1322
1323 /*
1324  * Driver initialization routine.
1325  * Invoked once at EAL init time.
1326  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1327  * Returns 0 on success.
1328  */
1329 static int
1330 rte_virtio_pmd_init(const char *name __rte_unused,
1331                     const char *param __rte_unused)
1332 {
1333         if (rte_eal_iopl_init() != 0) {
1334                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1335                 return -1;
1336         }
1337
1338         rte_eth_driver_register(&rte_virtio_pmd);
1339         return 0;
1340 }
1341
1342 /*
1343  * Configure virtio device
1344  * It returns 0 on success.
1345  */
1346 static int
1347 virtio_dev_configure(struct rte_eth_dev *dev)
1348 {
1349         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1350         struct virtio_hw *hw = dev->data->dev_private;
1351
1352         PMD_INIT_LOG(DEBUG, "configure");
1353
1354         if (rxmode->hw_ip_checksum) {
1355                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1356                 return -EINVAL;
1357         }
1358
1359         hw->vlan_strip = rxmode->hw_vlan_strip;
1360
1361         if (rxmode->hw_vlan_filter
1362             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1363                 PMD_DRV_LOG(NOTICE,
1364                             "vlan filtering not available on this host");
1365                 return -ENOTSUP;
1366         }
1367
1368         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1369                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1370                         PMD_DRV_LOG(ERR, "failed to set config vector");
1371                         return -EBUSY;
1372                 }
1373
1374         return 0;
1375 }
1376
1377
1378 static int
1379 virtio_dev_start(struct rte_eth_dev *dev)
1380 {
1381         uint16_t nb_queues, i;
1382         struct virtio_hw *hw = dev->data->dev_private;
1383         struct virtnet_rx *rxvq;
1384         struct virtnet_tx *txvq __rte_unused;
1385
1386         /* check if lsc interrupt feature is enabled */
1387         if (dev->data->dev_conf.intr_conf.lsc) {
1388                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1389                         PMD_DRV_LOG(ERR, "link status not supported by host");
1390                         return -ENOTSUP;
1391                 }
1392
1393                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1394                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1395                         return -EIO;
1396                 }
1397         }
1398
1399         /* Initialize Link state */
1400         virtio_dev_link_update(dev, 0);
1401
1402         /* On restart after stop do not touch queues */
1403         if (hw->started)
1404                 return 0;
1405
1406         /* Do final configuration before rx/tx engine starts */
1407         virtio_dev_rxtx_start(dev);
1408         vtpci_reinit_complete(hw);
1409
1410         hw->started = 1;
1411
1412         /*Notify the backend
1413          *Otherwise the tap backend might already stop its queue due to fullness.
1414          *vhost backend will have no chance to be waked up
1415          */
1416         nb_queues = dev->data->nb_rx_queues;
1417         if (nb_queues > 1) {
1418                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1419                         return -EINVAL;
1420         }
1421
1422         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1423
1424         for (i = 0; i < nb_queues; i++) {
1425                 rxvq = dev->data->rx_queues[i];
1426                 virtqueue_notify(rxvq->vq);
1427         }
1428
1429         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1430
1431         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1432                 rxvq = dev->data->rx_queues[i];
1433                 VIRTQUEUE_DUMP(rxvq->vq);
1434         }
1435
1436         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1437                 txvq = dev->data->tx_queues[i];
1438                 VIRTQUEUE_DUMP(txvq->vq);
1439         }
1440
1441         return 0;
1442 }
1443
1444 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1445 {
1446         struct rte_mbuf *buf;
1447         int i, mbuf_num = 0;
1448
1449         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1450                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1451
1452                 PMD_INIT_LOG(DEBUG,
1453                              "Before freeing rxq[%d] used and unused buf", i);
1454                 VIRTQUEUE_DUMP(rxvq->vq);
1455
1456                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1457                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1458                         rte_pktmbuf_free(buf);
1459                         mbuf_num++;
1460                 }
1461
1462                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1463                 PMD_INIT_LOG(DEBUG,
1464                              "After freeing rxq[%d] used and unused buf", i);
1465                 VIRTQUEUE_DUMP(rxvq->vq);
1466         }
1467
1468         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1469                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1470
1471                 PMD_INIT_LOG(DEBUG,
1472                              "Before freeing txq[%d] used and unused bufs",
1473                              i);
1474                 VIRTQUEUE_DUMP(txvq->vq);
1475
1476                 mbuf_num = 0;
1477                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1478                         rte_pktmbuf_free(buf);
1479                         mbuf_num++;
1480                 }
1481
1482                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1483                 PMD_INIT_LOG(DEBUG,
1484                              "After freeing txq[%d] used and unused buf", i);
1485                 VIRTQUEUE_DUMP(txvq->vq);
1486         }
1487 }
1488
1489 /*
1490  * Stop device: disable interrupt and mark link down
1491  */
1492 static void
1493 virtio_dev_stop(struct rte_eth_dev *dev)
1494 {
1495         struct rte_eth_link link;
1496         struct virtio_hw *hw = dev->data->dev_private;
1497
1498         PMD_INIT_LOG(DEBUG, "stop");
1499
1500         hw->started = 0;
1501
1502         if (dev->data->dev_conf.intr_conf.lsc)
1503                 rte_intr_disable(&dev->pci_dev->intr_handle);
1504
1505         memset(&link, 0, sizeof(link));
1506         virtio_dev_atomic_write_link_status(dev, &link);
1507 }
1508
1509 static int
1510 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1511 {
1512         struct rte_eth_link link, old;
1513         uint16_t status;
1514         struct virtio_hw *hw = dev->data->dev_private;
1515         memset(&link, 0, sizeof(link));
1516         virtio_dev_atomic_read_link_status(dev, &link);
1517         old = link;
1518         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1519         link.link_speed  = SPEED_10G;
1520
1521         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1522                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1523                 vtpci_read_dev_config(hw,
1524                                 offsetof(struct virtio_net_config, status),
1525                                 &status, sizeof(status));
1526                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1527                         link.link_status = ETH_LINK_DOWN;
1528                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1529                                      dev->data->port_id);
1530                 } else {
1531                         link.link_status = ETH_LINK_UP;
1532                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1533                                      dev->data->port_id);
1534                 }
1535         } else {
1536                 link.link_status = ETH_LINK_UP;
1537         }
1538         virtio_dev_atomic_write_link_status(dev, &link);
1539
1540         return (old.link_status == link.link_status) ? -1 : 0;
1541 }
1542
1543 static void
1544 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1545 {
1546         struct virtio_hw *hw = dev->data->dev_private;
1547
1548         if (dev->pci_dev)
1549                 dev_info->driver_name = dev->driver->pci_drv.name;
1550         else
1551                 dev_info->driver_name = "virtio-user PMD";
1552         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1553         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1554         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1555         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1556         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1557         dev_info->default_txconf = (struct rte_eth_txconf) {
1558                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1559         };
1560 }
1561
1562 /*
1563  * It enables testpmd to collect per queue stats.
1564  */
1565 static int
1566 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1567 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1568 __rte_unused uint8_t is_rx)
1569 {
1570         return 0;
1571 }
1572
1573 static struct rte_driver rte_virtio_driver = {
1574         .type = PMD_PDEV,
1575         .init = rte_virtio_pmd_init,
1576 };
1577
1578 PMD_REGISTER_DRIVER(rte_virtio_driver);