4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #ifdef RTE_EXEC_ENV_LINUXAPP
44 #include <rte_ethdev.h>
45 #include <rte_memcpy.h>
46 #include <rte_string_fns.h>
47 #include <rte_memzone.h>
48 #include <rte_malloc.h>
49 #include <rte_atomic.h>
50 #include <rte_branch_prediction.h>
52 #include <rte_ether.h>
53 #include <rte_common.h>
55 #include <rte_memory.h>
59 #include "virtio_ethdev.h"
60 #include "virtio_pci.h"
61 #include "virtio_logs.h"
62 #include "virtqueue.h"
65 static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
66 static int virtio_dev_configure(struct rte_eth_dev *dev);
67 static int virtio_dev_start(struct rte_eth_dev *dev);
68 static void virtio_dev_stop(struct rte_eth_dev *dev);
69 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
70 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
71 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
72 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
73 static void virtio_dev_info_get(struct rte_eth_dev *dev,
74 struct rte_eth_dev_info *dev_info);
75 static int virtio_dev_link_update(struct rte_eth_dev *dev,
76 __rte_unused int wait_to_complete);
78 static void virtio_set_hwaddr(struct virtio_hw *hw);
79 static void virtio_get_hwaddr(struct virtio_hw *hw);
81 static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
82 static void virtio_dev_tx_queue_release(__rte_unused void *txq);
84 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
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);
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);
103 * The set of PCI devices this driver supports
105 static const struct rte_pci_id pci_id_virtio_map[] = {
107 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
108 #include "rte_pci_dev_ids.h"
110 { .vendor_id = 0, /* sentinel */ },
114 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
115 int *dlen, int pkt_num)
117 uint16_t head = vq->vq_desc_head_idx, i;
119 virtio_net_ctrl_ack status = ~0;
120 struct virtio_pmd_ctrl result;
122 ctrl->status = status;
126 "%s(): Control queue is not supported.",
131 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
132 "vq->hw->cvq = %p vq = %p",
133 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
135 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
138 memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
139 sizeof(struct virtio_pmd_ctrl));
142 * Format is enforced in qemu code:
143 * One TX packet for header;
144 * At least one TX packet per argument;
145 * One RX packet for ACK.
147 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
148 vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
149 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
151 i = vq->vq_ring.desc[head].next;
153 for (k = 0; k < pkt_num; k++) {
154 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
155 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
156 + sizeof(struct virtio_net_ctrl_hdr)
157 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
158 vq->vq_ring.desc[i].len = dlen[k];
161 i = vq->vq_ring.desc[i].next;
164 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
165 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
166 + sizeof(struct virtio_net_ctrl_hdr);
167 vq->vq_ring.desc[i].len = sizeof(ctrl->status);
170 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
172 vq_update_avail_ring(vq, head);
173 vq_update_avail_idx(vq);
175 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
177 virtqueue_notify(vq);
180 while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
185 while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
186 uint32_t idx, desc_idx, used_idx;
187 struct vring_used_elem *uep;
189 used_idx = (uint32_t)(vq->vq_used_cons_idx
190 & (vq->vq_nentries - 1));
191 uep = &vq->vq_ring.used->ring[used_idx];
192 idx = (uint32_t) uep->id;
195 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
196 desc_idx = vq->vq_ring.desc[desc_idx].next;
200 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
201 vq->vq_desc_head_idx = idx;
203 vq->vq_used_cons_idx++;
207 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
208 vq->vq_free_cnt, vq->vq_desc_head_idx);
210 memcpy(&result, vq->virtio_net_hdr_mz->addr,
211 sizeof(struct virtio_pmd_ctrl));
213 return result.status;
217 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
219 struct virtio_hw *hw = dev->data->dev_private;
220 struct virtio_pmd_ctrl ctrl;
224 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
225 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
226 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
228 dlen[0] = sizeof(uint16_t);
230 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
232 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
233 "failed, this is too late now...");
240 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
243 uint16_t vtpci_queue_idx,
245 unsigned int socket_id,
246 struct virtqueue **pvq)
248 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
249 const struct rte_memzone *mz;
252 struct virtio_hw *hw = dev->data->dev_private;
253 struct virtqueue *vq = NULL;
255 /* Write the virtqueue index to the Queue Select Field */
256 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
257 PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
260 * Read the virtqueue size from the Queue Size field
261 * Always power of 2 and if 0 virtqueue does not exist
263 vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
264 PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
268 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
270 } else if (!rte_is_power_of_2(vq_size)) {
271 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
273 } else if (nb_desc != vq_size) {
274 PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
279 if (queue_type == VTNET_RQ) {
280 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
281 dev->data->port_id, queue_idx);
282 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
283 vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
284 } else if (queue_type == VTNET_TQ) {
285 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
286 dev->data->port_id, queue_idx);
287 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
288 vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
289 } else if (queue_type == VTNET_CQ) {
290 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
292 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
293 vq_size * sizeof(struct vq_desc_extra),
294 RTE_CACHE_LINE_SIZE);
297 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
302 vq->port_id = dev->data->port_id;
303 vq->queue_id = queue_idx;
304 vq->vq_queue_index = vtpci_queue_idx;
305 vq->vq_nentries = vq_size;
306 vq->vq_free_cnt = vq_size;
309 * Reserve a memzone for vring elements
311 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
312 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
313 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
315 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
316 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
323 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
324 * and only accepts 32 bit page frame number.
325 * Check if the allocated physical memory exceeds 16TB.
327 if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
328 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
333 memset(mz->addr, 0, sizeof(mz->len));
335 vq->vq_ring_mem = mz->phys_addr;
336 vq->vq_ring_virt_mem = mz->addr;
337 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64, (uint64_t)mz->phys_addr);
338 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
339 vq->virtio_net_hdr_mz = NULL;
340 vq->virtio_net_hdr_mem = 0;
342 if (queue_type == VTNET_TQ) {
344 * For each xmit packet, allocate a virtio_net_hdr
346 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
347 dev->data->port_id, queue_idx);
348 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
349 vq_size * hw->vtnet_hdr_size,
350 socket_id, 0, RTE_CACHE_LINE_SIZE);
351 if (vq->virtio_net_hdr_mz == NULL) {
355 vq->virtio_net_hdr_mem =
356 vq->virtio_net_hdr_mz->phys_addr;
357 memset(vq->virtio_net_hdr_mz->addr, 0,
358 vq_size * hw->vtnet_hdr_size);
359 } else if (queue_type == VTNET_CQ) {
360 /* Allocate a page for control vq command, data and status */
361 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
363 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
364 PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
365 if (vq->virtio_net_hdr_mz == NULL) {
369 vq->virtio_net_hdr_mem =
370 vq->virtio_net_hdr_mz->phys_addr;
371 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
375 * Set guest physical address of the virtqueue
376 * in VIRTIO_PCI_QUEUE_PFN config register of device
378 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
379 mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
385 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
388 struct virtqueue *vq;
389 uint16_t nb_desc = 0;
391 struct virtio_hw *hw = dev->data->dev_private;
393 PMD_INIT_FUNC_TRACE();
394 ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
395 vtpci_queue_idx, nb_desc, socket_id, &vq);
397 PMD_INIT_LOG(ERR, "control vq initialization failed");
406 virtio_dev_close(struct rte_eth_dev *dev)
408 struct virtio_hw *hw = dev->data->dev_private;
409 struct rte_pci_device *pci_dev = dev->pci_dev;
411 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
414 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
415 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
418 virtio_dev_free_mbufs(dev);
422 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
424 struct virtio_hw *hw = dev->data->dev_private;
425 struct virtio_pmd_ctrl ctrl;
429 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
430 PMD_INIT_LOG(INFO, "host does not support rx control\n");
434 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
435 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
439 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
441 PMD_INIT_LOG(ERR, "Failed to enable promisc");
445 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
447 struct virtio_hw *hw = dev->data->dev_private;
448 struct virtio_pmd_ctrl ctrl;
452 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
453 PMD_INIT_LOG(INFO, "host does not support rx control\n");
457 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
458 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
462 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
464 PMD_INIT_LOG(ERR, "Failed to disable promisc");
468 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
470 struct virtio_hw *hw = dev->data->dev_private;
471 struct virtio_pmd_ctrl ctrl;
475 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
476 PMD_INIT_LOG(INFO, "host does not support rx control\n");
480 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
481 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
485 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
487 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
491 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
493 struct virtio_hw *hw = dev->data->dev_private;
494 struct virtio_pmd_ctrl ctrl;
498 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
499 PMD_INIT_LOG(INFO, "host does not support rx control\n");
503 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
504 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
508 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
510 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
514 * dev_ops for virtio, bare necessities for basic operation
516 static const struct eth_dev_ops virtio_eth_dev_ops = {
517 .dev_configure = virtio_dev_configure,
518 .dev_start = virtio_dev_start,
519 .dev_stop = virtio_dev_stop,
520 .dev_close = virtio_dev_close,
521 .promiscuous_enable = virtio_dev_promiscuous_enable,
522 .promiscuous_disable = virtio_dev_promiscuous_disable,
523 .allmulticast_enable = virtio_dev_allmulticast_enable,
524 .allmulticast_disable = virtio_dev_allmulticast_disable,
526 .dev_infos_get = virtio_dev_info_get,
527 .stats_get = virtio_dev_stats_get,
528 .stats_reset = virtio_dev_stats_reset,
529 .link_update = virtio_dev_link_update,
530 .rx_queue_setup = virtio_dev_rx_queue_setup,
531 /* meaningfull only to multiple queue */
532 .rx_queue_release = virtio_dev_rx_queue_release,
533 .tx_queue_setup = virtio_dev_tx_queue_setup,
534 /* meaningfull only to multiple queue */
535 .tx_queue_release = virtio_dev_tx_queue_release,
536 /* collect stats per queue */
537 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
538 .vlan_filter_set = virtio_vlan_filter_set,
539 .mac_addr_add = virtio_mac_addr_add,
540 .mac_addr_remove = virtio_mac_addr_remove,
541 .mac_addr_set = virtio_mac_addr_set,
545 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
546 struct rte_eth_link *link)
548 struct rte_eth_link *dst = link;
549 struct rte_eth_link *src = &(dev->data->dev_link);
551 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
552 *(uint64_t *)src) == 0)
559 * Atomically writes the link status information into global
560 * structure rte_eth_dev.
563 * - Pointer to the structure rte_eth_dev to read from.
564 * - Pointer to the buffer to be saved with the link status.
567 * - On success, zero.
568 * - On failure, negative value.
571 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
572 struct rte_eth_link *link)
574 struct rte_eth_link *dst = &(dev->data->dev_link);
575 struct rte_eth_link *src = link;
577 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
578 *(uint64_t *)src) == 0)
585 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
589 for (i = 0; i < dev->data->nb_tx_queues; i++) {
590 const struct virtqueue *txvq = dev->data->tx_queues[i];
594 stats->opackets += txvq->packets;
595 stats->obytes += txvq->bytes;
596 stats->oerrors += txvq->errors;
598 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
599 stats->q_opackets[i] = txvq->packets;
600 stats->q_obytes[i] = txvq->bytes;
604 for (i = 0; i < dev->data->nb_rx_queues; i++) {
605 const struct virtqueue *rxvq = dev->data->rx_queues[i];
609 stats->ipackets += rxvq->packets;
610 stats->ibytes += rxvq->bytes;
611 stats->ierrors += rxvq->errors;
613 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
614 stats->q_ipackets[i] = rxvq->packets;
615 stats->q_ibytes[i] = rxvq->bytes;
619 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
623 virtio_dev_stats_reset(struct rte_eth_dev *dev)
627 for (i = 0; i < dev->data->nb_tx_queues; i++) {
628 struct virtqueue *txvq = dev->data->tx_queues[i];
637 for (i = 0; i < dev->data->nb_rx_queues; i++) {
638 struct virtqueue *rxvq = dev->data->rx_queues[i];
647 dev->data->rx_mbuf_alloc_failed = 0;
651 virtio_set_hwaddr(struct virtio_hw *hw)
653 vtpci_write_dev_config(hw,
654 offsetof(struct virtio_net_config, mac),
655 &hw->mac_addr, ETHER_ADDR_LEN);
659 virtio_get_hwaddr(struct virtio_hw *hw)
661 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
662 vtpci_read_dev_config(hw,
663 offsetof(struct virtio_net_config, mac),
664 &hw->mac_addr, ETHER_ADDR_LEN);
666 eth_random_addr(&hw->mac_addr[0]);
667 virtio_set_hwaddr(hw);
672 virtio_mac_table_set(struct virtio_hw *hw,
673 const struct virtio_net_ctrl_mac *uc,
674 const struct virtio_net_ctrl_mac *mc)
676 struct virtio_pmd_ctrl ctrl;
679 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
680 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
682 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
683 memcpy(ctrl.data, uc, len[0]);
685 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
686 memcpy(ctrl.data + len[0], mc, len[1]);
688 err = virtio_send_command(hw->cvq, &ctrl, len, 2);
690 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
696 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
697 uint32_t index, uint32_t vmdq __rte_unused)
699 struct virtio_hw *hw = dev->data->dev_private;
700 const struct ether_addr *addrs = dev->data->mac_addrs;
702 struct virtio_net_ctrl_mac *uc, *mc;
704 if (index >= VIRTIO_MAX_MAC_ADDRS) {
705 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
709 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
711 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
714 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
715 const struct ether_addr *addr
716 = (i == index) ? mac_addr : addrs + i;
717 struct virtio_net_ctrl_mac *tbl
718 = is_multicast_ether_addr(addr) ? mc : uc;
720 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
723 virtio_mac_table_set(hw, uc, mc);
727 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
729 struct virtio_hw *hw = dev->data->dev_private;
730 struct ether_addr *addrs = dev->data->mac_addrs;
731 struct virtio_net_ctrl_mac *uc, *mc;
734 if (index >= VIRTIO_MAX_MAC_ADDRS) {
735 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
739 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
741 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
744 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
745 struct virtio_net_ctrl_mac *tbl;
747 if (i == index || is_zero_ether_addr(addrs + i))
750 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
751 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
754 virtio_mac_table_set(hw, uc, mc);
758 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
760 struct virtio_hw *hw = dev->data->dev_private;
762 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
764 /* Use atomic update if available */
765 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
766 struct virtio_pmd_ctrl ctrl;
767 int len = ETHER_ADDR_LEN;
769 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
770 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
772 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
773 virtio_send_command(hw->cvq, &ctrl, &len, 1);
774 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
775 virtio_set_hwaddr(hw);
779 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
781 struct virtio_hw *hw = dev->data->dev_private;
782 struct virtio_pmd_ctrl ctrl;
785 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
788 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
789 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
790 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
791 len = sizeof(vlan_id);
793 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
797 virtio_negotiate_features(struct virtio_hw *hw)
799 uint32_t host_features, mask;
801 /* checksum offload not implemented */
802 mask = VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
804 /* TSO and LRO are only available when their corresponding
805 * checksum offload feature is also negotiated.
807 mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
808 mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
809 mask |= VTNET_LRO_FEATURES;
811 /* not negotiating INDIRECT descriptor table support */
812 mask |= VIRTIO_RING_F_INDIRECT_DESC;
814 /* Prepare guest_features: feature that driver wants to support */
815 hw->guest_features = VTNET_FEATURES & ~mask;
816 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
819 /* Read device(host) feature bits */
820 host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
821 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
825 * Negotiate features: Subset of device feature bits are written back
826 * guest feature bits.
828 hw->guest_features = vtpci_negotiate_features(hw, host_features);
829 PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
833 #ifdef RTE_EXEC_ENV_LINUXAPP
835 parse_sysfs_value(const char *filename, unsigned long *val)
841 f = fopen(filename, "r");
843 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
848 if (fgets(buf, sizeof(buf), f) == NULL) {
849 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
854 *val = strtoul(buf, &end, 0);
855 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
856 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
865 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
866 unsigned int *uio_num)
870 char dirname[PATH_MAX];
872 /* depending on kernel version, uio can be located in uio/uioX
874 snprintf(dirname, sizeof(dirname),
875 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
876 loc->domain, loc->bus, loc->devid, loc->function);
877 dir = opendir(dirname);
879 /* retry with the parent directory */
880 snprintf(dirname, sizeof(dirname),
881 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
882 loc->domain, loc->bus, loc->devid, loc->function);
883 dir = opendir(dirname);
886 PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
891 /* take the first file starting with "uio" */
892 while ((e = readdir(dir)) != NULL) {
893 /* format could be uio%d ...*/
894 int shortprefix_len = sizeof("uio") - 1;
895 /* ... or uio:uio%d */
896 int longprefix_len = sizeof("uio:uio") - 1;
899 if (strncmp(e->d_name, "uio", 3) != 0)
902 /* first try uio%d */
904 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
905 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
906 snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
910 /* then try uio:uio%d */
912 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
913 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
914 snprintf(buf, buflen, "%s/uio:uio%u", dirname,
921 /* No uio resource found */
923 PMD_INIT_LOG(ERR, "Could not find uio resource");
931 virtio_has_msix(const struct rte_pci_addr *loc)
934 char dirname[PATH_MAX];
936 snprintf(dirname, sizeof(dirname),
937 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
938 loc->domain, loc->bus, loc->devid, loc->function);
940 d = opendir(dirname);
947 /* Extract I/O port numbers from sysfs */
948 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
950 char dirname[PATH_MAX];
951 char filename[PATH_MAX];
952 unsigned long start, size;
953 unsigned int uio_num;
955 if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
958 /* get portio size */
959 snprintf(filename, sizeof(filename),
960 "%s/portio/port0/size", dirname);
961 if (parse_sysfs_value(filename, &size) < 0) {
962 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
967 /* get portio start */
968 snprintf(filename, sizeof(filename),
969 "%s/portio/port0/start", dirname);
970 if (parse_sysfs_value(filename, &start) < 0) {
971 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
975 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
976 pci_dev->mem_resource[0].len = (uint64_t)size;
978 "PCI Port IO found start=0x%lx with size=0x%lx",
982 memset(dirname, 0, sizeof(dirname));
983 snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
984 pci_dev->intr_handle.fd = open(dirname, O_RDWR);
985 if (pci_dev->intr_handle.fd < 0) {
986 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
987 dirname, strerror(errno));
991 pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
992 pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
997 /* Extract port I/O numbers from proc/ioports */
998 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
1000 uint16_t start, end;
1008 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
1009 pci_dev->addr.domain,
1011 pci_dev->addr.devid,
1012 pci_dev->addr.function);
1014 fp = fopen("/proc/ioports", "r");
1016 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1020 while (getdelim(&line, &linesz, '\n', fp) > 0) {
1025 n = strcspn(ptr, ":");
1029 while (*left && isspace(*left))
1032 if (!strncmp(left, pci_id, strlen(pci_id))) {
1035 while (*ptr && isspace(*ptr))
1038 sscanf(ptr, "%04hx-%04hx", &start, &end);
1039 size = end - start + 1;
1051 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1052 pci_dev->mem_resource[0].len = (uint64_t)size;
1054 "PCI Port IO found start=0x%x with size=0x%x",
1057 /* can't support lsc interrupt without uio */
1058 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1063 /* Extract I/O port numbers from sysfs */
1064 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1066 if (virtio_resource_init_by_uio(pci_dev) == 0)
1069 return virtio_resource_init_by_ioports(pci_dev);
1074 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1076 /* nic_uio does not enable interrupts, return 0 (false). */
1080 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1082 /* no setup required */
1088 * Process Virtio Config changed interrupt and call the callback
1089 * if link state changed.
1092 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1095 struct rte_eth_dev *dev = param;
1096 struct virtio_hw *hw = dev->data->dev_private;
1099 /* Read interrupt status which clears interrupt */
1100 isr = vtpci_isr(hw);
1101 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1103 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1104 PMD_DRV_LOG(ERR, "interrupt enable failed");
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);
1115 rx_func_get(struct rte_eth_dev *eth_dev)
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;
1121 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1125 * This function is based on probe() function in virtio_pci.c
1126 * It returns 0 on success.
1129 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1131 struct virtio_hw *hw = eth_dev->data->dev_private;
1132 struct virtio_net_config *config;
1133 struct virtio_net_config local_config;
1134 uint32_t offset_conf = sizeof(config->mac);
1135 struct rte_pci_device *pci_dev;
1137 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1139 eth_dev->dev_ops = &virtio_eth_dev_ops;
1140 eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1142 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1143 rx_func_get(eth_dev);
1147 /* Allocate memory for storing MAC addresses */
1148 eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
1149 if (eth_dev->data->mac_addrs == NULL) {
1151 "Failed to allocate %d bytes needed to store MAC addresses",
1156 pci_dev = eth_dev->pci_dev;
1157 if (virtio_resource_init(pci_dev) < 0)
1160 hw->use_msix = virtio_has_msix(&pci_dev->addr);
1161 hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1163 /* Reset the device although not necessary at startup */
1166 /* Tell the host we've noticed this device. */
1167 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1169 /* Tell the host we've known how to drive the device. */
1170 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1171 virtio_negotiate_features(hw);
1173 rx_func_get(eth_dev);
1175 /* Setting up rx_header size for the device */
1176 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1177 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1179 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1181 /* Copy the permanent MAC address to: virtio_hw */
1182 virtio_get_hwaddr(hw);
1183 ether_addr_copy((struct ether_addr *) hw->mac_addr,
1184 ð_dev->data->mac_addrs[0]);
1186 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1187 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1188 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1190 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1191 config = &local_config;
1193 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1194 offset_conf += sizeof(config->status);
1197 "VIRTIO_NET_F_STATUS is not supported");
1201 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1202 offset_conf += sizeof(config->max_virtqueue_pairs);
1205 "VIRTIO_NET_F_MQ is not supported");
1206 config->max_virtqueue_pairs = 1;
1209 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
1212 (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1213 VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1215 (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1216 VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1218 virtio_dev_cq_queue_setup(eth_dev,
1219 config->max_virtqueue_pairs * 2,
1222 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1223 config->max_virtqueue_pairs);
1224 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1226 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1227 config->mac[0], config->mac[1],
1228 config->mac[2], config->mac[3],
1229 config->mac[4], config->mac[5]);
1231 hw->max_rx_queues = 1;
1232 hw->max_tx_queues = 1;
1235 eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1236 eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1238 PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d",
1239 hw->max_rx_queues, hw->max_tx_queues);
1240 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1241 eth_dev->data->port_id, pci_dev->id.vendor_id,
1242 pci_dev->id.device_id);
1244 /* Setup interrupt callback */
1245 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1246 rte_intr_callback_register(&pci_dev->intr_handle,
1247 virtio_interrupt_handler, eth_dev);
1249 virtio_dev_cq_start(eth_dev);
1254 static struct eth_driver rte_virtio_pmd = {
1256 .name = "rte_virtio_pmd",
1257 .id_table = pci_id_virtio_map,
1259 .eth_dev_init = eth_virtio_dev_init,
1260 .dev_private_size = sizeof(struct virtio_hw),
1264 * Driver initialization routine.
1265 * Invoked once at EAL init time.
1266 * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1267 * Returns 0 on success.
1270 rte_virtio_pmd_init(const char *name __rte_unused,
1271 const char *param __rte_unused)
1273 if (rte_eal_iopl_init() != 0) {
1274 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1278 rte_eth_driver_register(&rte_virtio_pmd);
1283 * Only 1 queue is supported, no queue release related operation
1286 virtio_dev_rx_queue_release(__rte_unused void *rxq)
1291 virtio_dev_tx_queue_release(__rte_unused void *txq)
1296 * Configure virtio device
1297 * It returns 0 on success.
1300 virtio_dev_configure(struct rte_eth_dev *dev)
1302 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1303 struct virtio_hw *hw = dev->data->dev_private;
1304 struct rte_pci_device *pci_dev = dev->pci_dev;
1306 PMD_INIT_LOG(DEBUG, "configure");
1308 if (rxmode->hw_ip_checksum) {
1309 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1313 hw->vlan_strip = rxmode->hw_vlan_strip;
1315 if (rxmode->hw_vlan_filter
1316 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1318 "vlan filtering not available on this host");
1322 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1323 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1324 PMD_DRV_LOG(ERR, "failed to set config vector");
1333 virtio_dev_start(struct rte_eth_dev *dev)
1335 uint16_t nb_queues, i;
1336 struct virtio_hw *hw = dev->data->dev_private;
1337 struct rte_pci_device *pci_dev = dev->pci_dev;
1339 /* check if lsc interrupt feature is enabled */
1340 if ((dev->data->dev_conf.intr_conf.lsc) &&
1341 (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1342 if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1343 PMD_DRV_LOG(ERR, "link status not supported by host");
1347 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1348 PMD_DRV_LOG(ERR, "interrupt enable failed");
1353 /* Initialize Link state */
1354 virtio_dev_link_update(dev, 0);
1356 /* On restart after stop do not touch queues */
1360 /* Do final configuration before rx/tx engine starts */
1361 virtio_dev_rxtx_start(dev);
1362 vtpci_reinit_complete(hw);
1366 /*Notify the backend
1367 *Otherwise the tap backend might already stop its queue due to fullness.
1368 *vhost backend will have no chance to be waked up
1370 nb_queues = dev->data->nb_rx_queues;
1371 if (nb_queues > 1) {
1372 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1376 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1378 for (i = 0; i < nb_queues; i++)
1379 virtqueue_notify(dev->data->rx_queues[i]);
1381 PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1383 for (i = 0; i < dev->data->nb_rx_queues; i++)
1384 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1386 for (i = 0; i < dev->data->nb_tx_queues; i++)
1387 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1392 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1394 struct rte_mbuf *buf;
1395 int i, mbuf_num = 0;
1397 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1399 "Before freeing rxq[%d] used and unused buf", i);
1400 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1402 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1403 dev->data->rx_queues[i])) != NULL) {
1404 rte_pktmbuf_free(buf);
1408 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1410 "After freeing rxq[%d] used and unused buf", i);
1411 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1414 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1416 "Before freeing txq[%d] used and unused bufs",
1418 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1421 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1422 dev->data->tx_queues[i])) != NULL) {
1423 rte_pktmbuf_free(buf);
1428 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1430 "After freeing txq[%d] used and unused buf", i);
1431 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1436 * Stop device: disable interrupt and mark link down
1439 virtio_dev_stop(struct rte_eth_dev *dev)
1441 struct rte_eth_link link;
1443 PMD_INIT_LOG(DEBUG, "stop");
1445 if (dev->data->dev_conf.intr_conf.lsc)
1446 rte_intr_disable(&dev->pci_dev->intr_handle);
1448 memset(&link, 0, sizeof(link));
1449 virtio_dev_atomic_write_link_status(dev, &link);
1453 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1455 struct rte_eth_link link, old;
1457 struct virtio_hw *hw = dev->data->dev_private;
1458 memset(&link, 0, sizeof(link));
1459 virtio_dev_atomic_read_link_status(dev, &link);
1461 link.link_duplex = FULL_DUPLEX;
1462 link.link_speed = SPEED_10G;
1464 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1465 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1466 vtpci_read_dev_config(hw,
1467 offsetof(struct virtio_net_config, status),
1468 &status, sizeof(status));
1469 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1470 link.link_status = 0;
1471 PMD_INIT_LOG(DEBUG, "Port %d is down",
1472 dev->data->port_id);
1474 link.link_status = 1;
1475 PMD_INIT_LOG(DEBUG, "Port %d is up",
1476 dev->data->port_id);
1479 link.link_status = 1; /* Link up */
1481 virtio_dev_atomic_write_link_status(dev, &link);
1483 return (old.link_status == link.link_status) ? -1 : 0;
1487 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1489 struct virtio_hw *hw = dev->data->dev_private;
1491 dev_info->driver_name = dev->driver->pci_drv.name;
1492 dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1493 dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1494 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1495 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1496 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1497 dev_info->default_txconf = (struct rte_eth_txconf) {
1498 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1503 * It enables testpmd to collect per queue stats.
1506 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1507 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1508 __rte_unused uint8_t is_rx)
1513 static struct rte_driver rte_virtio_driver = {
1515 .init = rte_virtio_pmd_init,
1518 PMD_REGISTER_DRIVER(rte_virtio_driver);