4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
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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.
40 #include <rte_ethdev.h>
41 #include <rte_ethdev_pci.h>
42 #include <rte_memcpy.h>
43 #include <rte_string_fns.h>
44 #include <rte_memzone.h>
45 #include <rte_malloc.h>
46 #include <rte_atomic.h>
47 #include <rte_branch_prediction.h>
49 #include <rte_bus_pci.h>
50 #include <rte_ether.h>
51 #include <rte_common.h>
52 #include <rte_errno.h>
53 #include <rte_cpuflags.h>
55 #include <rte_memory.h>
59 #include "virtio_ethdev.h"
60 #include "virtio_pci.h"
61 #include "virtio_logs.h"
62 #include "virtqueue.h"
63 #include "virtio_rxtx.h"
65 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
66 static int virtio_dev_configure(struct rte_eth_dev *dev);
67 static int virtio_dev_start(struct rte_eth_dev *dev);
68 static void virtio_dev_stop(struct rte_eth_dev *dev);
69 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
70 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
71 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
72 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
73 static void virtio_dev_info_get(struct rte_eth_dev *dev,
74 struct rte_eth_dev_info *dev_info);
75 static int virtio_dev_link_update(struct rte_eth_dev *dev,
76 int wait_to_complete);
77 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
79 static void virtio_set_hwaddr(struct virtio_hw *hw);
80 static void virtio_get_hwaddr(struct virtio_hw *hw);
82 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
83 struct rte_eth_stats *stats);
84 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
85 struct rte_eth_xstat *xstats, unsigned n);
86 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
87 struct rte_eth_xstat_name *xstats_names,
89 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
90 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
91 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
92 uint16_t vlan_id, int on);
93 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
94 struct ether_addr *mac_addr,
95 uint32_t index, uint32_t vmdq);
96 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
97 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
98 struct ether_addr *mac_addr);
100 static int virtio_intr_enable(struct rte_eth_dev *dev);
101 static int virtio_intr_disable(struct rte_eth_dev *dev);
103 static int virtio_dev_queue_stats_mapping_set(
104 struct rte_eth_dev *eth_dev,
110 * The set of PCI devices this driver supports
112 static const struct rte_pci_id pci_id_virtio_map[] = {
113 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
114 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
115 { .vendor_id = 0, /* sentinel */ },
118 struct rte_virtio_xstats_name_off {
119 char name[RTE_ETH_XSTATS_NAME_SIZE];
123 /* [rt]x_qX_ is prepended to the name string here */
124 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
125 {"good_packets", offsetof(struct virtnet_rx, stats.packets)},
126 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)},
127 {"errors", offsetof(struct virtnet_rx, stats.errors)},
128 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)},
129 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)},
130 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])},
131 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])},
132 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])},
133 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])},
134 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])},
135 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])},
136 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
137 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])},
140 /* [rt]x_qX_ is prepended to the name string here */
141 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
142 {"good_packets", offsetof(struct virtnet_tx, stats.packets)},
143 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)},
144 {"errors", offsetof(struct virtnet_tx, stats.errors)},
145 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)},
146 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)},
147 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])},
148 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])},
149 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])},
150 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])},
151 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])},
152 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])},
153 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
154 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])},
157 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
158 sizeof(rte_virtio_rxq_stat_strings[0]))
159 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
160 sizeof(rte_virtio_txq_stat_strings[0]))
162 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
165 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
166 int *dlen, int pkt_num)
170 virtio_net_ctrl_ack status = ~0;
171 struct virtio_pmd_ctrl *result;
172 struct virtqueue *vq;
174 ctrl->status = status;
176 if (!cvq || !cvq->vq) {
177 PMD_INIT_LOG(ERR, "Control queue is not supported.");
181 head = vq->vq_desc_head_idx;
183 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
184 "vq->hw->cvq = %p vq = %p",
185 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
187 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
190 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
191 sizeof(struct virtio_pmd_ctrl));
194 * Format is enforced in qemu code:
195 * One TX packet for header;
196 * At least one TX packet per argument;
197 * One RX packet for ACK.
199 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
200 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
201 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
203 i = vq->vq_ring.desc[head].next;
205 for (k = 0; k < pkt_num; k++) {
206 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
207 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
208 + sizeof(struct virtio_net_ctrl_hdr)
209 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
210 vq->vq_ring.desc[i].len = dlen[k];
213 i = vq->vq_ring.desc[i].next;
216 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
217 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
218 + sizeof(struct virtio_net_ctrl_hdr);
219 vq->vq_ring.desc[i].len = sizeof(ctrl->status);
222 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
224 vq_update_avail_ring(vq, head);
225 vq_update_avail_idx(vq);
227 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
229 virtqueue_notify(vq);
232 while (VIRTQUEUE_NUSED(vq) == 0) {
237 while (VIRTQUEUE_NUSED(vq)) {
238 uint32_t idx, desc_idx, used_idx;
239 struct vring_used_elem *uep;
241 used_idx = (uint32_t)(vq->vq_used_cons_idx
242 & (vq->vq_nentries - 1));
243 uep = &vq->vq_ring.used->ring[used_idx];
244 idx = (uint32_t) uep->id;
247 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
248 desc_idx = vq->vq_ring.desc[desc_idx].next;
252 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
253 vq->vq_desc_head_idx = idx;
255 vq->vq_used_cons_idx++;
259 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
260 vq->vq_free_cnt, vq->vq_desc_head_idx);
262 result = cvq->virtio_net_hdr_mz->addr;
264 return result->status;
268 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
270 struct virtio_hw *hw = dev->data->dev_private;
271 struct virtio_pmd_ctrl ctrl;
275 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
276 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
277 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
279 dlen[0] = sizeof(uint16_t);
281 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
283 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
284 "failed, this is too late now...");
292 virtio_dev_queue_release(void *queue __rte_unused)
298 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
300 if (vtpci_queue_idx == hw->max_queue_pairs * 2)
302 else if (vtpci_queue_idx % 2 == 0)
309 virtio_get_nr_vq(struct virtio_hw *hw)
311 uint16_t nr_vq = hw->max_queue_pairs * 2;
313 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
320 virtio_init_vring(struct virtqueue *vq)
322 int size = vq->vq_nentries;
323 struct vring *vr = &vq->vq_ring;
324 uint8_t *ring_mem = vq->vq_ring_virt_mem;
326 PMD_INIT_FUNC_TRACE();
329 * Reinitialise since virtio port might have been stopped and restarted
331 memset(ring_mem, 0, vq->vq_ring_size);
332 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
333 vq->vq_used_cons_idx = 0;
334 vq->vq_desc_head_idx = 0;
335 vq->vq_avail_idx = 0;
336 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
337 vq->vq_free_cnt = vq->vq_nentries;
338 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
340 vring_desc_init(vr->desc, size);
343 * Disable device(host) interrupting guest
345 virtqueue_disable_intr(vq);
349 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
351 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
352 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
353 const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
354 unsigned int vq_size, size;
355 struct virtio_hw *hw = dev->data->dev_private;
356 struct virtnet_rx *rxvq = NULL;
357 struct virtnet_tx *txvq = NULL;
358 struct virtnet_ctl *cvq = NULL;
359 struct virtqueue *vq;
360 size_t sz_hdr_mz = 0;
361 void *sw_ring = NULL;
362 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
365 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
368 * Read the virtqueue size from the Queue Size field
369 * Always power of 2 and if 0 virtqueue does not exist
371 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
372 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
374 PMD_INIT_LOG(ERR, "virtqueue does not exist");
378 if (!rte_is_power_of_2(vq_size)) {
379 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
383 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
384 dev->data->port_id, vtpci_queue_idx);
386 size = RTE_ALIGN_CEIL(sizeof(*vq) +
387 vq_size * sizeof(struct vq_desc_extra),
388 RTE_CACHE_LINE_SIZE);
389 if (queue_type == VTNET_TQ) {
391 * For each xmit packet, allocate a virtio_net_hdr
392 * and indirect ring elements
394 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
395 } else if (queue_type == VTNET_CQ) {
396 /* Allocate a page for control vq command, data and status */
397 sz_hdr_mz = PAGE_SIZE;
400 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
403 PMD_INIT_LOG(ERR, "can not allocate vq");
406 hw->vqs[vtpci_queue_idx] = vq;
409 vq->vq_queue_index = vtpci_queue_idx;
410 vq->vq_nentries = vq_size;
413 * Reserve a memzone for vring elements
415 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
416 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
417 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
418 size, vq->vq_ring_size);
420 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
422 0, VIRTIO_PCI_VRING_ALIGN);
424 if (rte_errno == EEXIST)
425 mz = rte_memzone_lookup(vq_name);
432 memset(mz->addr, 0, mz->len);
434 vq->vq_ring_mem = mz->iova;
435 vq->vq_ring_virt_mem = mz->addr;
436 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64,
438 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
439 (uint64_t)(uintptr_t)mz->addr);
441 virtio_init_vring(vq);
444 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
445 dev->data->port_id, vtpci_queue_idx);
446 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
448 RTE_CACHE_LINE_SIZE);
449 if (hdr_mz == NULL) {
450 if (rte_errno == EEXIST)
451 hdr_mz = rte_memzone_lookup(vq_hdr_name);
452 if (hdr_mz == NULL) {
459 if (queue_type == VTNET_RQ) {
460 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
461 sizeof(vq->sw_ring[0]);
463 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
464 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
466 PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
471 vq->sw_ring = sw_ring;
474 rxvq->port_id = dev->data->port_id;
476 } else if (queue_type == VTNET_TQ) {
479 txvq->port_id = dev->data->port_id;
481 txvq->virtio_net_hdr_mz = hdr_mz;
482 txvq->virtio_net_hdr_mem = hdr_mz->iova;
483 } else if (queue_type == VTNET_CQ) {
487 cvq->virtio_net_hdr_mz = hdr_mz;
488 cvq->virtio_net_hdr_mem = hdr_mz->iova;
489 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
494 /* For virtio_user case (that is when hw->dev is NULL), we use
495 * virtual address. And we need properly set _offset_, please see
496 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
498 if (!hw->virtio_user_dev)
499 vq->offset = offsetof(struct rte_mbuf, buf_iova);
501 vq->vq_ring_mem = (uintptr_t)mz->addr;
502 vq->offset = offsetof(struct rte_mbuf, buf_addr);
503 if (queue_type == VTNET_TQ)
504 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
505 else if (queue_type == VTNET_CQ)
506 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
509 if (queue_type == VTNET_TQ) {
510 struct virtio_tx_region *txr;
514 memset(txr, 0, vq_size * sizeof(*txr));
515 for (i = 0; i < vq_size; i++) {
516 struct vring_desc *start_dp = txr[i].tx_indir;
518 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
520 /* first indirect descriptor is always the tx header */
521 start_dp->addr = txvq->virtio_net_hdr_mem
523 + offsetof(struct virtio_tx_region, tx_hdr);
525 start_dp->len = hw->vtnet_hdr_size;
526 start_dp->flags = VRING_DESC_F_NEXT;
530 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
531 PMD_INIT_LOG(ERR, "setup_queue failed");
539 rte_memzone_free(hdr_mz);
540 rte_memzone_free(mz);
547 virtio_free_queues(struct virtio_hw *hw)
549 uint16_t nr_vq = virtio_get_nr_vq(hw);
550 struct virtqueue *vq;
557 for (i = 0; i < nr_vq; i++) {
562 queue_type = virtio_get_queue_type(hw, i);
563 if (queue_type == VTNET_RQ) {
564 rte_free(vq->sw_ring);
565 rte_memzone_free(vq->rxq.mz);
566 } else if (queue_type == VTNET_TQ) {
567 rte_memzone_free(vq->txq.mz);
568 rte_memzone_free(vq->txq.virtio_net_hdr_mz);
570 rte_memzone_free(vq->cq.mz);
571 rte_memzone_free(vq->cq.virtio_net_hdr_mz);
583 virtio_alloc_queues(struct rte_eth_dev *dev)
585 struct virtio_hw *hw = dev->data->dev_private;
586 uint16_t nr_vq = virtio_get_nr_vq(hw);
590 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
592 PMD_INIT_LOG(ERR, "failed to allocate vqs");
596 for (i = 0; i < nr_vq; i++) {
597 ret = virtio_init_queue(dev, i);
599 virtio_free_queues(hw);
607 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
610 virtio_dev_close(struct rte_eth_dev *dev)
612 struct virtio_hw *hw = dev->data->dev_private;
613 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
615 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
618 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
619 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
621 virtio_queues_unbind_intr(dev);
623 if (intr_conf->lsc || intr_conf->rxq) {
624 virtio_intr_disable(dev);
625 rte_intr_efd_disable(dev->intr_handle);
626 rte_free(dev->intr_handle->intr_vec);
627 dev->intr_handle->intr_vec = NULL;
631 virtio_dev_free_mbufs(dev);
632 virtio_free_queues(hw);
636 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
638 struct virtio_hw *hw = dev->data->dev_private;
639 struct virtio_pmd_ctrl ctrl;
643 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
644 PMD_INIT_LOG(INFO, "host does not support rx control");
648 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
649 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
653 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
655 PMD_INIT_LOG(ERR, "Failed to enable promisc");
659 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
661 struct virtio_hw *hw = dev->data->dev_private;
662 struct virtio_pmd_ctrl ctrl;
666 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
667 PMD_INIT_LOG(INFO, "host does not support rx control");
671 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
672 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
676 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
678 PMD_INIT_LOG(ERR, "Failed to disable promisc");
682 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
684 struct virtio_hw *hw = dev->data->dev_private;
685 struct virtio_pmd_ctrl ctrl;
689 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
690 PMD_INIT_LOG(INFO, "host does not support rx control");
694 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
695 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
699 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
701 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
705 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
707 struct virtio_hw *hw = dev->data->dev_private;
708 struct virtio_pmd_ctrl ctrl;
712 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
713 PMD_INIT_LOG(INFO, "host does not support rx control");
717 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
718 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
722 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
724 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
727 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */
729 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
731 struct virtio_hw *hw = dev->data->dev_private;
732 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
734 uint32_t frame_size = mtu + ether_hdr_len;
735 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
737 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
739 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
740 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
741 ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
748 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
750 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
751 struct virtqueue *vq = rxvq->vq;
753 virtqueue_enable_intr(vq);
758 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
760 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
761 struct virtqueue *vq = rxvq->vq;
763 virtqueue_disable_intr(vq);
768 * dev_ops for virtio, bare necessities for basic operation
770 static const struct eth_dev_ops virtio_eth_dev_ops = {
771 .dev_configure = virtio_dev_configure,
772 .dev_start = virtio_dev_start,
773 .dev_stop = virtio_dev_stop,
774 .dev_close = virtio_dev_close,
775 .promiscuous_enable = virtio_dev_promiscuous_enable,
776 .promiscuous_disable = virtio_dev_promiscuous_disable,
777 .allmulticast_enable = virtio_dev_allmulticast_enable,
778 .allmulticast_disable = virtio_dev_allmulticast_disable,
779 .mtu_set = virtio_mtu_set,
780 .dev_infos_get = virtio_dev_info_get,
781 .stats_get = virtio_dev_stats_get,
782 .xstats_get = virtio_dev_xstats_get,
783 .xstats_get_names = virtio_dev_xstats_get_names,
784 .stats_reset = virtio_dev_stats_reset,
785 .xstats_reset = virtio_dev_stats_reset,
786 .link_update = virtio_dev_link_update,
787 .vlan_offload_set = virtio_dev_vlan_offload_set,
788 .rx_queue_setup = virtio_dev_rx_queue_setup,
789 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable,
790 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable,
791 .rx_queue_release = virtio_dev_queue_release,
792 .rx_descriptor_done = virtio_dev_rx_queue_done,
793 .tx_queue_setup = virtio_dev_tx_queue_setup,
794 .tx_queue_release = virtio_dev_queue_release,
795 /* collect stats per queue */
796 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
797 .vlan_filter_set = virtio_vlan_filter_set,
798 .mac_addr_add = virtio_mac_addr_add,
799 .mac_addr_remove = virtio_mac_addr_remove,
800 .mac_addr_set = virtio_mac_addr_set,
804 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
805 struct rte_eth_link *link)
807 struct rte_eth_link *dst = link;
808 struct rte_eth_link *src = &(dev->data->dev_link);
810 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
811 *(uint64_t *)src) == 0)
818 * Atomically writes the link status information into global
819 * structure rte_eth_dev.
822 * - Pointer to the structure rte_eth_dev to read from.
823 * - Pointer to the buffer to be saved with the link status.
826 * - On success, zero.
827 * - On failure, negative value.
830 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
831 struct rte_eth_link *link)
833 struct rte_eth_link *dst = &(dev->data->dev_link);
834 struct rte_eth_link *src = link;
836 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
837 *(uint64_t *)src) == 0)
844 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
848 for (i = 0; i < dev->data->nb_tx_queues; i++) {
849 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
853 stats->opackets += txvq->stats.packets;
854 stats->obytes += txvq->stats.bytes;
855 stats->oerrors += txvq->stats.errors;
857 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
858 stats->q_opackets[i] = txvq->stats.packets;
859 stats->q_obytes[i] = txvq->stats.bytes;
863 for (i = 0; i < dev->data->nb_rx_queues; i++) {
864 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
868 stats->ipackets += rxvq->stats.packets;
869 stats->ibytes += rxvq->stats.bytes;
870 stats->ierrors += rxvq->stats.errors;
872 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
873 stats->q_ipackets[i] = rxvq->stats.packets;
874 stats->q_ibytes[i] = rxvq->stats.bytes;
878 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
881 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
882 struct rte_eth_xstat_name *xstats_names,
883 __rte_unused unsigned limit)
889 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
890 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
892 if (xstats_names != NULL) {
893 /* Note: limit checked in rte_eth_xstats_names() */
895 for (i = 0; i < dev->data->nb_rx_queues; i++) {
896 struct virtqueue *rxvq = dev->data->rx_queues[i];
899 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
900 snprintf(xstats_names[count].name,
901 sizeof(xstats_names[count].name),
903 rte_virtio_rxq_stat_strings[t].name);
908 for (i = 0; i < dev->data->nb_tx_queues; i++) {
909 struct virtqueue *txvq = dev->data->tx_queues[i];
912 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
913 snprintf(xstats_names[count].name,
914 sizeof(xstats_names[count].name),
916 rte_virtio_txq_stat_strings[t].name);
926 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
932 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
933 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
938 for (i = 0; i < dev->data->nb_rx_queues; i++) {
939 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
946 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
947 xstats[count].value = *(uint64_t *)(((char *)rxvq) +
948 rte_virtio_rxq_stat_strings[t].offset);
949 xstats[count].id = count;
954 for (i = 0; i < dev->data->nb_tx_queues; i++) {
955 struct virtnet_tx *txvq = dev->data->tx_queues[i];
962 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
963 xstats[count].value = *(uint64_t *)(((char *)txvq) +
964 rte_virtio_txq_stat_strings[t].offset);
965 xstats[count].id = count;
974 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
976 virtio_update_stats(dev, stats);
982 virtio_dev_stats_reset(struct rte_eth_dev *dev)
986 for (i = 0; i < dev->data->nb_tx_queues; i++) {
987 struct virtnet_tx *txvq = dev->data->tx_queues[i];
991 txvq->stats.packets = 0;
992 txvq->stats.bytes = 0;
993 txvq->stats.errors = 0;
994 txvq->stats.multicast = 0;
995 txvq->stats.broadcast = 0;
996 memset(txvq->stats.size_bins, 0,
997 sizeof(txvq->stats.size_bins[0]) * 8);
1000 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1001 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1005 rxvq->stats.packets = 0;
1006 rxvq->stats.bytes = 0;
1007 rxvq->stats.errors = 0;
1008 rxvq->stats.multicast = 0;
1009 rxvq->stats.broadcast = 0;
1010 memset(rxvq->stats.size_bins, 0,
1011 sizeof(rxvq->stats.size_bins[0]) * 8);
1016 virtio_set_hwaddr(struct virtio_hw *hw)
1018 vtpci_write_dev_config(hw,
1019 offsetof(struct virtio_net_config, mac),
1020 &hw->mac_addr, ETHER_ADDR_LEN);
1024 virtio_get_hwaddr(struct virtio_hw *hw)
1026 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1027 vtpci_read_dev_config(hw,
1028 offsetof(struct virtio_net_config, mac),
1029 &hw->mac_addr, ETHER_ADDR_LEN);
1031 eth_random_addr(&hw->mac_addr[0]);
1032 virtio_set_hwaddr(hw);
1037 virtio_mac_table_set(struct virtio_hw *hw,
1038 const struct virtio_net_ctrl_mac *uc,
1039 const struct virtio_net_ctrl_mac *mc)
1041 struct virtio_pmd_ctrl ctrl;
1044 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1045 PMD_DRV_LOG(INFO, "host does not support mac table");
1049 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1050 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1052 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1053 memcpy(ctrl.data, uc, len[0]);
1055 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1056 memcpy(ctrl.data + len[0], mc, len[1]);
1058 err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1060 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1065 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1066 uint32_t index, uint32_t vmdq __rte_unused)
1068 struct virtio_hw *hw = dev->data->dev_private;
1069 const struct ether_addr *addrs = dev->data->mac_addrs;
1071 struct virtio_net_ctrl_mac *uc, *mc;
1073 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1074 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1078 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1080 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1083 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1084 const struct ether_addr *addr
1085 = (i == index) ? mac_addr : addrs + i;
1086 struct virtio_net_ctrl_mac *tbl
1087 = is_multicast_ether_addr(addr) ? mc : uc;
1089 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1092 return virtio_mac_table_set(hw, uc, mc);
1096 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1098 struct virtio_hw *hw = dev->data->dev_private;
1099 struct ether_addr *addrs = dev->data->mac_addrs;
1100 struct virtio_net_ctrl_mac *uc, *mc;
1103 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1104 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1108 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1110 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1113 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1114 struct virtio_net_ctrl_mac *tbl;
1116 if (i == index || is_zero_ether_addr(addrs + i))
1119 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1120 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1123 virtio_mac_table_set(hw, uc, mc);
1127 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1129 struct virtio_hw *hw = dev->data->dev_private;
1131 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1133 /* Use atomic update if available */
1134 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1135 struct virtio_pmd_ctrl ctrl;
1136 int len = ETHER_ADDR_LEN;
1138 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1139 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1141 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1142 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1143 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1144 virtio_set_hwaddr(hw);
1148 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1150 struct virtio_hw *hw = dev->data->dev_private;
1151 struct virtio_pmd_ctrl ctrl;
1154 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1157 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1158 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1159 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1160 len = sizeof(vlan_id);
1162 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1166 virtio_intr_enable(struct rte_eth_dev *dev)
1168 struct virtio_hw *hw = dev->data->dev_private;
1170 if (rte_intr_enable(dev->intr_handle) < 0)
1173 if (!hw->virtio_user_dev)
1174 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1180 virtio_intr_disable(struct rte_eth_dev *dev)
1182 struct virtio_hw *hw = dev->data->dev_private;
1184 if (rte_intr_disable(dev->intr_handle) < 0)
1187 if (!hw->virtio_user_dev)
1188 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1194 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1196 uint64_t host_features;
1198 /* Prepare guest_features: feature that driver wants to support */
1199 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1202 /* Read device(host) feature bits */
1203 host_features = VTPCI_OPS(hw)->get_features(hw);
1204 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1207 /* If supported, ensure MTU value is valid before acknowledging it. */
1208 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1209 struct virtio_net_config config;
1211 vtpci_read_dev_config(hw,
1212 offsetof(struct virtio_net_config, mtu),
1213 &config.mtu, sizeof(config.mtu));
1215 if (config.mtu < ETHER_MIN_MTU)
1216 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1220 * Negotiate features: Subset of device feature bits are written back
1221 * guest feature bits.
1223 hw->guest_features = req_features;
1224 hw->guest_features = vtpci_negotiate_features(hw, host_features);
1225 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1226 hw->guest_features);
1229 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1231 "VIRTIO_F_VERSION_1 features is not enabled.");
1234 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1235 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1237 "failed to set FEATURES_OK status!");
1242 hw->req_guest_features = req_features;
1248 * Process Virtio Config changed interrupt and call the callback
1249 * if link state changed.
1252 virtio_interrupt_handler(void *param)
1254 struct rte_eth_dev *dev = param;
1255 struct virtio_hw *hw = dev->data->dev_private;
1258 /* Read interrupt status which clears interrupt */
1259 isr = vtpci_isr(hw);
1260 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1262 if (virtio_intr_enable(dev) < 0)
1263 PMD_DRV_LOG(ERR, "interrupt enable failed");
1265 if (isr & VIRTIO_PCI_ISR_CONFIG) {
1266 if (virtio_dev_link_update(dev, 0) == 0)
1267 _rte_eth_dev_callback_process(dev,
1268 RTE_ETH_EVENT_INTR_LSC,
1274 /* set rx and tx handlers according to what is supported */
1276 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1278 struct virtio_hw *hw = eth_dev->data->dev_private;
1280 if (hw->use_simple_rx) {
1281 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1282 eth_dev->data->port_id);
1283 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1284 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1286 "virtio: using mergeable buffer Rx path on port %u",
1287 eth_dev->data->port_id);
1288 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1290 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1291 eth_dev->data->port_id);
1292 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1295 if (hw->use_simple_tx) {
1296 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1297 eth_dev->data->port_id);
1298 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1300 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1301 eth_dev->data->port_id);
1302 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1306 /* Only support 1:1 queue/interrupt mapping so far.
1307 * TODO: support n:1 queue/interrupt mapping when there are limited number of
1308 * interrupt vectors (<N+1).
1311 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1314 struct virtio_hw *hw = dev->data->dev_private;
1316 PMD_INIT_LOG(INFO, "queue/interrupt binding");
1317 for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1318 dev->intr_handle->intr_vec[i] = i + 1;
1319 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1320 VIRTIO_MSI_NO_VECTOR) {
1321 PMD_DRV_LOG(ERR, "failed to set queue vector");
1330 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1333 struct virtio_hw *hw = dev->data->dev_private;
1335 PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1336 for (i = 0; i < dev->data->nb_rx_queues; ++i)
1337 VTPCI_OPS(hw)->set_queue_irq(hw,
1338 hw->vqs[i * VTNET_CQ],
1339 VIRTIO_MSI_NO_VECTOR);
1343 virtio_configure_intr(struct rte_eth_dev *dev)
1345 struct virtio_hw *hw = dev->data->dev_private;
1347 if (!rte_intr_cap_multiple(dev->intr_handle)) {
1348 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1352 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1353 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1357 if (!dev->intr_handle->intr_vec) {
1358 dev->intr_handle->intr_vec =
1359 rte_zmalloc("intr_vec",
1360 hw->max_queue_pairs * sizeof(int), 0);
1361 if (!dev->intr_handle->intr_vec) {
1362 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1363 hw->max_queue_pairs);
1368 /* Re-register callback to update max_intr */
1369 rte_intr_callback_unregister(dev->intr_handle,
1370 virtio_interrupt_handler,
1372 rte_intr_callback_register(dev->intr_handle,
1373 virtio_interrupt_handler,
1376 /* DO NOT try to remove this! This function will enable msix, or QEMU
1377 * will encounter SIGSEGV when DRIVER_OK is sent.
1378 * And for legacy devices, this should be done before queue/vec binding
1379 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1380 * (22) will be ignored.
1382 if (virtio_intr_enable(dev) < 0) {
1383 PMD_DRV_LOG(ERR, "interrupt enable failed");
1387 if (virtio_queues_bind_intr(dev) < 0) {
1388 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1395 /* reset device and renegotiate features if needed */
1397 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1399 struct virtio_hw *hw = eth_dev->data->dev_private;
1400 struct virtio_net_config *config;
1401 struct virtio_net_config local_config;
1402 struct rte_pci_device *pci_dev = NULL;
1405 /* Reset the device although not necessary at startup */
1408 /* Tell the host we've noticed this device. */
1409 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1411 /* Tell the host we've known how to drive the device. */
1412 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1413 if (virtio_negotiate_features(hw, req_features) < 0)
1416 if (!hw->virtio_user_dev) {
1417 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1418 rte_eth_copy_pci_info(eth_dev, pci_dev);
1421 /* If host does not support both status and MSI-X then disable LSC */
1422 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1423 hw->use_msix != VIRTIO_MSIX_NONE)
1424 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1426 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1428 /* Setting up rx_header size for the device */
1429 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1430 vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1431 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1433 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1435 /* Copy the permanent MAC address to: virtio_hw */
1436 virtio_get_hwaddr(hw);
1437 ether_addr_copy((struct ether_addr *) hw->mac_addr,
1438 ð_dev->data->mac_addrs[0]);
1440 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1441 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1442 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1444 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1445 config = &local_config;
1447 vtpci_read_dev_config(hw,
1448 offsetof(struct virtio_net_config, mac),
1449 &config->mac, sizeof(config->mac));
1451 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1452 vtpci_read_dev_config(hw,
1453 offsetof(struct virtio_net_config, status),
1454 &config->status, sizeof(config->status));
1457 "VIRTIO_NET_F_STATUS is not supported");
1461 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1462 vtpci_read_dev_config(hw,
1463 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1464 &config->max_virtqueue_pairs,
1465 sizeof(config->max_virtqueue_pairs));
1468 "VIRTIO_NET_F_MQ is not supported");
1469 config->max_virtqueue_pairs = 1;
1472 hw->max_queue_pairs = config->max_virtqueue_pairs;
1474 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1475 vtpci_read_dev_config(hw,
1476 offsetof(struct virtio_net_config, mtu),
1478 sizeof(config->mtu));
1481 * MTU value has already been checked at negotiation
1482 * time, but check again in case it has changed since
1483 * then, which should not happen.
1485 if (config->mtu < ETHER_MIN_MTU) {
1486 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1491 hw->max_mtu = config->mtu;
1492 /* Set initial MTU to maximum one supported by vhost */
1493 eth_dev->data->mtu = config->mtu;
1496 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1497 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1500 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1501 config->max_virtqueue_pairs);
1502 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1504 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1505 config->mac[0], config->mac[1],
1506 config->mac[2], config->mac[3],
1507 config->mac[4], config->mac[5]);
1509 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1510 hw->max_queue_pairs = 1;
1513 ret = virtio_alloc_queues(eth_dev);
1517 if (eth_dev->data->dev_conf.intr_conf.rxq) {
1518 if (virtio_configure_intr(eth_dev) < 0) {
1519 PMD_INIT_LOG(ERR, "failed to configure interrupt");
1524 vtpci_reinit_complete(hw);
1527 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1528 eth_dev->data->port_id, pci_dev->id.vendor_id,
1529 pci_dev->id.device_id);
1535 * Remap the PCI device again (IO port map for legacy device and
1536 * memory map for modern device), so that the secondary process
1537 * could have the PCI initiated correctly.
1540 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1544 * We don't have to re-parse the PCI config space, since
1545 * rte_pci_map_device() makes sure the mapped address
1546 * in secondary process would equal to the one mapped in
1547 * the primary process: error will be returned if that
1548 * requirement is not met.
1550 * That said, we could simply reuse all cap pointers
1551 * (such as dev_cfg, common_cfg, etc.) parsed from the
1552 * primary process, which is stored in shared memory.
1554 if (rte_pci_map_device(pci_dev)) {
1555 PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1559 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1567 virtio_set_vtpci_ops(struct virtio_hw *hw)
1569 #ifdef RTE_VIRTIO_USER
1570 if (hw->virtio_user_dev)
1571 VTPCI_OPS(hw) = &virtio_user_ops;
1575 VTPCI_OPS(hw) = &modern_ops;
1577 VTPCI_OPS(hw) = &legacy_ops;
1581 * This function is based on probe() function in virtio_pci.c
1582 * It returns 0 on success.
1585 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1587 struct virtio_hw *hw = eth_dev->data->dev_private;
1590 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1592 eth_dev->dev_ops = &virtio_eth_dev_ops;
1594 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1595 if (!hw->virtio_user_dev) {
1596 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1601 virtio_set_vtpci_ops(hw);
1602 set_rxtx_funcs(eth_dev);
1607 /* Allocate memory for storing MAC addresses */
1608 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1609 if (eth_dev->data->mac_addrs == NULL) {
1611 "Failed to allocate %d bytes needed to store MAC addresses",
1612 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1616 hw->port_id = eth_dev->data->port_id;
1617 /* For virtio_user case the hw->virtio_user_dev is populated by
1618 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1620 if (!hw->virtio_user_dev) {
1621 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1626 /* reset device and negotiate default features */
1627 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1631 /* Setup interrupt callback */
1632 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1633 rte_intr_callback_register(eth_dev->intr_handle,
1634 virtio_interrupt_handler, eth_dev);
1639 rte_free(eth_dev->data->mac_addrs);
1644 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1646 PMD_INIT_FUNC_TRACE();
1648 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1651 virtio_dev_stop(eth_dev);
1652 virtio_dev_close(eth_dev);
1654 eth_dev->dev_ops = NULL;
1655 eth_dev->tx_pkt_burst = NULL;
1656 eth_dev->rx_pkt_burst = NULL;
1658 rte_free(eth_dev->data->mac_addrs);
1659 eth_dev->data->mac_addrs = NULL;
1661 /* reset interrupt callback */
1662 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1663 rte_intr_callback_unregister(eth_dev->intr_handle,
1664 virtio_interrupt_handler,
1666 if (eth_dev->device)
1667 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1669 PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1674 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1675 struct rte_pci_device *pci_dev)
1677 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1678 eth_virtio_dev_init);
1681 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1683 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1686 static struct rte_pci_driver rte_virtio_pmd = {
1688 .name = "net_virtio",
1690 .id_table = pci_id_virtio_map,
1692 .probe = eth_virtio_pci_probe,
1693 .remove = eth_virtio_pci_remove,
1696 RTE_INIT(rte_virtio_pmd_init);
1698 rte_virtio_pmd_init(void)
1700 if (rte_eal_iopl_init() != 0) {
1701 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1705 rte_pci_register(&rte_virtio_pmd);
1709 * Configure virtio device
1710 * It returns 0 on success.
1713 virtio_dev_configure(struct rte_eth_dev *dev)
1715 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1716 struct virtio_hw *hw = dev->data->dev_private;
1717 uint64_t req_features;
1720 PMD_INIT_LOG(DEBUG, "configure");
1721 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1723 if (dev->data->dev_conf.intr_conf.rxq) {
1724 ret = virtio_init_device(dev, hw->req_guest_features);
1729 /* The name hw_ip_checksum is a bit confusing since it can be
1730 * set by the application to request L3 and/or L4 checksums. In
1731 * case of virtio, only L4 checksum is supported.
1733 if (rxmode->hw_ip_checksum)
1734 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1736 if (rxmode->enable_lro)
1738 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1739 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1741 /* if request features changed, reinit the device */
1742 if (req_features != hw->req_guest_features) {
1743 ret = virtio_init_device(dev, req_features);
1748 if (rxmode->hw_ip_checksum &&
1749 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1751 "rx checksum not available on this host");
1755 if (rxmode->enable_lro &&
1756 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1757 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1759 "Large Receive Offload not available on this host");
1763 /* start control queue */
1764 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1765 virtio_dev_cq_start(dev);
1767 hw->vlan_strip = rxmode->hw_vlan_strip;
1769 if (rxmode->hw_vlan_filter
1770 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1772 "vlan filtering not available on this host");
1776 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1777 /* Enable vector (0) for Link State Intrerrupt */
1778 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1779 VIRTIO_MSI_NO_VECTOR) {
1780 PMD_DRV_LOG(ERR, "failed to set config vector");
1784 hw->use_simple_rx = 1;
1785 hw->use_simple_tx = 1;
1787 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1788 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1789 hw->use_simple_rx = 0;
1790 hw->use_simple_tx = 0;
1793 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1794 hw->use_simple_rx = 0;
1795 hw->use_simple_tx = 0;
1798 if (rxmode->hw_ip_checksum)
1799 hw->use_simple_rx = 0;
1806 virtio_dev_start(struct rte_eth_dev *dev)
1808 uint16_t nb_queues, i;
1809 struct virtnet_rx *rxvq;
1810 struct virtnet_tx *txvq __rte_unused;
1811 struct virtio_hw *hw = dev->data->dev_private;
1814 /* Finish the initialization of the queues */
1815 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1816 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1820 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1821 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1826 /* check if lsc interrupt feature is enabled */
1827 if (dev->data->dev_conf.intr_conf.lsc) {
1828 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1829 PMD_DRV_LOG(ERR, "link status not supported by host");
1834 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1835 * in device configure, but it could be unmapped when device is
1838 if (dev->data->dev_conf.intr_conf.lsc ||
1839 dev->data->dev_conf.intr_conf.rxq) {
1840 virtio_intr_disable(dev);
1842 if (virtio_intr_enable(dev) < 0) {
1843 PMD_DRV_LOG(ERR, "interrupt enable failed");
1848 /*Notify the backend
1849 *Otherwise the tap backend might already stop its queue due to fullness.
1850 *vhost backend will have no chance to be waked up
1852 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1853 if (hw->max_queue_pairs > 1) {
1854 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1858 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1860 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1861 rxvq = dev->data->rx_queues[i];
1862 /* Flush the old packets */
1863 virtqueue_flush(rxvq->vq);
1864 virtqueue_notify(rxvq->vq);
1867 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1868 txvq = dev->data->tx_queues[i];
1869 virtqueue_notify(txvq->vq);
1872 PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1874 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1875 rxvq = dev->data->rx_queues[i];
1876 VIRTQUEUE_DUMP(rxvq->vq);
1879 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1880 txvq = dev->data->tx_queues[i];
1881 VIRTQUEUE_DUMP(txvq->vq);
1884 set_rxtx_funcs(dev);
1887 /* Initialize Link state */
1888 virtio_dev_link_update(dev, 0);
1893 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1895 struct rte_mbuf *buf;
1896 int i, mbuf_num = 0;
1898 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1899 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1902 "Before freeing rxq[%d] used and unused buf", i);
1903 VIRTQUEUE_DUMP(rxvq->vq);
1905 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1906 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1907 rte_pktmbuf_free(buf);
1911 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1913 "After freeing rxq[%d] used and unused buf", i);
1914 VIRTQUEUE_DUMP(rxvq->vq);
1917 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1918 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1921 "Before freeing txq[%d] used and unused bufs",
1923 VIRTQUEUE_DUMP(txvq->vq);
1926 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1927 rte_pktmbuf_free(buf);
1931 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1933 "After freeing txq[%d] used and unused buf", i);
1934 VIRTQUEUE_DUMP(txvq->vq);
1939 * Stop device: disable interrupt and mark link down
1942 virtio_dev_stop(struct rte_eth_dev *dev)
1944 struct virtio_hw *hw = dev->data->dev_private;
1945 struct rte_eth_link link;
1946 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1948 PMD_INIT_LOG(DEBUG, "stop");
1950 if (intr_conf->lsc || intr_conf->rxq)
1951 virtio_intr_disable(dev);
1954 memset(&link, 0, sizeof(link));
1955 virtio_dev_atomic_write_link_status(dev, &link);
1959 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1961 struct rte_eth_link link, old;
1963 struct virtio_hw *hw = dev->data->dev_private;
1964 memset(&link, 0, sizeof(link));
1965 virtio_dev_atomic_read_link_status(dev, &link);
1967 link.link_duplex = ETH_LINK_FULL_DUPLEX;
1968 link.link_speed = SPEED_10G;
1970 if (hw->started == 0) {
1971 link.link_status = ETH_LINK_DOWN;
1972 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1973 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1974 vtpci_read_dev_config(hw,
1975 offsetof(struct virtio_net_config, status),
1976 &status, sizeof(status));
1977 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1978 link.link_status = ETH_LINK_DOWN;
1979 PMD_INIT_LOG(DEBUG, "Port %d is down",
1980 dev->data->port_id);
1982 link.link_status = ETH_LINK_UP;
1983 PMD_INIT_LOG(DEBUG, "Port %d is up",
1984 dev->data->port_id);
1987 link.link_status = ETH_LINK_UP;
1989 virtio_dev_atomic_write_link_status(dev, &link);
1991 return (old.link_status == link.link_status) ? -1 : 0;
1995 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1997 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1998 struct virtio_hw *hw = dev->data->dev_private;
2000 if (mask & ETH_VLAN_FILTER_MASK) {
2001 if (rxmode->hw_vlan_filter &&
2002 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2005 "vlan filtering not available on this host");
2011 if (mask & ETH_VLAN_STRIP_MASK)
2012 hw->vlan_strip = rxmode->hw_vlan_strip;
2018 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2020 uint64_t tso_mask, host_features;
2021 struct virtio_hw *hw = dev->data->dev_private;
2023 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2025 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
2026 dev_info->max_rx_queues =
2027 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2028 dev_info->max_tx_queues =
2029 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2030 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2031 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2032 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2033 dev_info->default_txconf = (struct rte_eth_txconf) {
2034 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2037 host_features = VTPCI_OPS(hw)->get_features(hw);
2038 dev_info->rx_offload_capa = 0;
2039 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2040 dev_info->rx_offload_capa |=
2041 DEV_RX_OFFLOAD_TCP_CKSUM |
2042 DEV_RX_OFFLOAD_UDP_CKSUM;
2044 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2045 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2046 if ((host_features & tso_mask) == tso_mask)
2047 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2049 dev_info->tx_offload_capa = 0;
2050 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2051 dev_info->tx_offload_capa |=
2052 DEV_TX_OFFLOAD_UDP_CKSUM |
2053 DEV_TX_OFFLOAD_TCP_CKSUM;
2055 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2056 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2057 if ((hw->guest_features & tso_mask) == tso_mask)
2058 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2062 * It enables testpmd to collect per queue stats.
2065 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2066 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2067 __rte_unused uint8_t is_rx)
2072 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2073 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2074 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");