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_ether.h>
50 #include <rte_common.h>
51 #include <rte_errno.h>
52 #include <rte_cpuflags.h>
54 #include <rte_memory.h>
58 #include "virtio_ethdev.h"
59 #include "virtio_pci.h"
60 #include "virtio_logs.h"
61 #include "virtqueue.h"
62 #include "virtio_rxtx.h"
64 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
65 static int virtio_dev_configure(struct rte_eth_dev *dev);
66 static int virtio_dev_start(struct rte_eth_dev *dev);
67 static void virtio_dev_stop(struct rte_eth_dev *dev);
68 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
69 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
70 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
71 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
72 static void virtio_dev_info_get(struct rte_eth_dev *dev,
73 struct rte_eth_dev_info *dev_info);
74 static int virtio_dev_link_update(struct rte_eth_dev *dev,
75 int wait_to_complete);
76 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
78 static void virtio_set_hwaddr(struct virtio_hw *hw);
79 static void virtio_get_hwaddr(struct virtio_hw *hw);
81 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
82 struct rte_eth_stats *stats);
83 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
84 struct rte_eth_xstat *xstats, unsigned n);
85 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
86 struct rte_eth_xstat_name *xstats_names,
88 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
89 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
90 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
91 uint16_t vlan_id, int on);
92 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
93 struct ether_addr *mac_addr,
94 uint32_t index, uint32_t vmdq);
95 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
96 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
97 struct ether_addr *mac_addr);
99 static int virtio_dev_queue_stats_mapping_set(
100 struct rte_eth_dev *eth_dev,
106 * The set of PCI devices this driver supports
108 static const struct rte_pci_id pci_id_virtio_map[] = {
109 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
110 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
111 { .vendor_id = 0, /* sentinel */ },
114 struct rte_virtio_xstats_name_off {
115 char name[RTE_ETH_XSTATS_NAME_SIZE];
119 /* [rt]x_qX_ is prepended to the name string here */
120 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
121 {"good_packets", offsetof(struct virtnet_rx, stats.packets)},
122 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)},
123 {"errors", offsetof(struct virtnet_rx, stats.errors)},
124 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)},
125 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)},
126 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])},
127 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])},
128 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])},
129 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])},
130 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])},
131 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])},
132 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
133 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])},
136 /* [rt]x_qX_ is prepended to the name string here */
137 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
138 {"good_packets", offsetof(struct virtnet_tx, stats.packets)},
139 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)},
140 {"errors", offsetof(struct virtnet_tx, stats.errors)},
141 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)},
142 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)},
143 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])},
144 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])},
145 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])},
146 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])},
147 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])},
148 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])},
149 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
150 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])},
153 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
154 sizeof(rte_virtio_rxq_stat_strings[0]))
155 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
156 sizeof(rte_virtio_txq_stat_strings[0]))
158 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
161 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
162 int *dlen, int pkt_num)
166 virtio_net_ctrl_ack status = ~0;
167 struct virtio_pmd_ctrl *result;
168 struct virtqueue *vq;
170 ctrl->status = status;
172 if (!cvq || !cvq->vq) {
173 PMD_INIT_LOG(ERR, "Control queue is not supported.");
177 head = vq->vq_desc_head_idx;
179 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
180 "vq->hw->cvq = %p vq = %p",
181 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
183 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
186 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
187 sizeof(struct virtio_pmd_ctrl));
190 * Format is enforced in qemu code:
191 * One TX packet for header;
192 * At least one TX packet per argument;
193 * One RX packet for ACK.
195 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
196 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
197 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
199 i = vq->vq_ring.desc[head].next;
201 for (k = 0; k < pkt_num; k++) {
202 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
203 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
204 + sizeof(struct virtio_net_ctrl_hdr)
205 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
206 vq->vq_ring.desc[i].len = dlen[k];
209 i = vq->vq_ring.desc[i].next;
212 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
213 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
214 + sizeof(struct virtio_net_ctrl_hdr);
215 vq->vq_ring.desc[i].len = sizeof(ctrl->status);
218 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
220 vq_update_avail_ring(vq, head);
221 vq_update_avail_idx(vq);
223 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
225 virtqueue_notify(vq);
228 while (VIRTQUEUE_NUSED(vq) == 0) {
233 while (VIRTQUEUE_NUSED(vq)) {
234 uint32_t idx, desc_idx, used_idx;
235 struct vring_used_elem *uep;
237 used_idx = (uint32_t)(vq->vq_used_cons_idx
238 & (vq->vq_nentries - 1));
239 uep = &vq->vq_ring.used->ring[used_idx];
240 idx = (uint32_t) uep->id;
243 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
244 desc_idx = vq->vq_ring.desc[desc_idx].next;
248 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
249 vq->vq_desc_head_idx = idx;
251 vq->vq_used_cons_idx++;
255 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
256 vq->vq_free_cnt, vq->vq_desc_head_idx);
258 result = cvq->virtio_net_hdr_mz->addr;
260 return result->status;
264 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
266 struct virtio_hw *hw = dev->data->dev_private;
267 struct virtio_pmd_ctrl ctrl;
271 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
272 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
273 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
275 dlen[0] = sizeof(uint16_t);
277 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
279 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
280 "failed, this is too late now...");
288 virtio_dev_queue_release(void *queue __rte_unused)
294 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
296 if (vtpci_queue_idx == hw->max_queue_pairs * 2)
298 else if (vtpci_queue_idx % 2 == 0)
305 virtio_get_nr_vq(struct virtio_hw *hw)
307 uint16_t nr_vq = hw->max_queue_pairs * 2;
309 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
316 virtio_init_vring(struct virtqueue *vq)
318 int size = vq->vq_nentries;
319 struct vring *vr = &vq->vq_ring;
320 uint8_t *ring_mem = vq->vq_ring_virt_mem;
322 PMD_INIT_FUNC_TRACE();
325 * Reinitialise since virtio port might have been stopped and restarted
327 memset(ring_mem, 0, vq->vq_ring_size);
328 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
329 vq->vq_used_cons_idx = 0;
330 vq->vq_desc_head_idx = 0;
331 vq->vq_avail_idx = 0;
332 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
333 vq->vq_free_cnt = vq->vq_nentries;
334 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
336 vring_desc_init(vr->desc, size);
339 * Disable device(host) interrupting guest
341 virtqueue_disable_intr(vq);
345 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
347 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
348 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
349 const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
350 unsigned int vq_size, size;
351 struct virtio_hw *hw = dev->data->dev_private;
352 struct virtnet_rx *rxvq = NULL;
353 struct virtnet_tx *txvq = NULL;
354 struct virtnet_ctl *cvq = NULL;
355 struct virtqueue *vq;
356 size_t sz_hdr_mz = 0;
357 void *sw_ring = NULL;
358 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
361 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
364 * Read the virtqueue size from the Queue Size field
365 * Always power of 2 and if 0 virtqueue does not exist
367 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
368 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
370 PMD_INIT_LOG(ERR, "virtqueue does not exist");
374 if (!rte_is_power_of_2(vq_size)) {
375 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
379 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
380 dev->data->port_id, vtpci_queue_idx);
382 size = RTE_ALIGN_CEIL(sizeof(*vq) +
383 vq_size * sizeof(struct vq_desc_extra),
384 RTE_CACHE_LINE_SIZE);
385 if (queue_type == VTNET_TQ) {
387 * For each xmit packet, allocate a virtio_net_hdr
388 * and indirect ring elements
390 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
391 } else if (queue_type == VTNET_CQ) {
392 /* Allocate a page for control vq command, data and status */
393 sz_hdr_mz = PAGE_SIZE;
396 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
399 PMD_INIT_LOG(ERR, "can not allocate vq");
402 hw->vqs[vtpci_queue_idx] = vq;
405 vq->vq_queue_index = vtpci_queue_idx;
406 vq->vq_nentries = vq_size;
409 * Reserve a memzone for vring elements
411 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
412 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
413 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
414 size, vq->vq_ring_size);
416 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
418 0, VIRTIO_PCI_VRING_ALIGN);
420 if (rte_errno == EEXIST)
421 mz = rte_memzone_lookup(vq_name);
428 memset(mz->addr, 0, mz->len);
430 vq->vq_ring_mem = mz->phys_addr;
431 vq->vq_ring_virt_mem = mz->addr;
432 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64,
433 (uint64_t)mz->phys_addr);
434 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
435 (uint64_t)(uintptr_t)mz->addr);
437 virtio_init_vring(vq);
440 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
441 dev->data->port_id, vtpci_queue_idx);
442 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
444 RTE_CACHE_LINE_SIZE);
445 if (hdr_mz == NULL) {
446 if (rte_errno == EEXIST)
447 hdr_mz = rte_memzone_lookup(vq_hdr_name);
448 if (hdr_mz == NULL) {
455 if (queue_type == VTNET_RQ) {
456 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
457 sizeof(vq->sw_ring[0]);
459 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
460 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
462 PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
467 vq->sw_ring = sw_ring;
470 rxvq->port_id = dev->data->port_id;
472 } else if (queue_type == VTNET_TQ) {
475 txvq->port_id = dev->data->port_id;
477 txvq->virtio_net_hdr_mz = hdr_mz;
478 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
479 } else if (queue_type == VTNET_CQ) {
483 cvq->virtio_net_hdr_mz = hdr_mz;
484 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
485 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
490 /* For virtio_user case (that is when hw->dev is NULL), we use
491 * virtual address. And we need properly set _offset_, please see
492 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
494 if (!hw->virtio_user_dev)
495 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
497 vq->vq_ring_mem = (uintptr_t)mz->addr;
498 vq->offset = offsetof(struct rte_mbuf, buf_addr);
499 if (queue_type == VTNET_TQ)
500 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
501 else if (queue_type == VTNET_CQ)
502 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
505 if (queue_type == VTNET_TQ) {
506 struct virtio_tx_region *txr;
510 memset(txr, 0, vq_size * sizeof(*txr));
511 for (i = 0; i < vq_size; i++) {
512 struct vring_desc *start_dp = txr[i].tx_indir;
514 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
516 /* first indirect descriptor is always the tx header */
517 start_dp->addr = txvq->virtio_net_hdr_mem
519 + offsetof(struct virtio_tx_region, tx_hdr);
521 start_dp->len = hw->vtnet_hdr_size;
522 start_dp->flags = VRING_DESC_F_NEXT;
526 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
527 PMD_INIT_LOG(ERR, "setup_queue failed");
535 rte_memzone_free(hdr_mz);
536 rte_memzone_free(mz);
543 virtio_free_queues(struct virtio_hw *hw)
545 uint16_t nr_vq = virtio_get_nr_vq(hw);
546 struct virtqueue *vq;
553 for (i = 0; i < nr_vq; i++) {
558 queue_type = virtio_get_queue_type(hw, i);
559 if (queue_type == VTNET_RQ) {
560 rte_free(vq->sw_ring);
561 rte_memzone_free(vq->rxq.mz);
562 } else if (queue_type == VTNET_TQ) {
563 rte_memzone_free(vq->txq.mz);
564 rte_memzone_free(vq->txq.virtio_net_hdr_mz);
566 rte_memzone_free(vq->cq.mz);
567 rte_memzone_free(vq->cq.virtio_net_hdr_mz);
579 virtio_alloc_queues(struct rte_eth_dev *dev)
581 struct virtio_hw *hw = dev->data->dev_private;
582 uint16_t nr_vq = virtio_get_nr_vq(hw);
586 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
588 PMD_INIT_LOG(ERR, "failed to allocate vqs");
592 for (i = 0; i < nr_vq; i++) {
593 ret = virtio_init_queue(dev, i);
595 virtio_free_queues(hw);
603 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
606 virtio_dev_close(struct rte_eth_dev *dev)
608 struct virtio_hw *hw = dev->data->dev_private;
609 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
611 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
614 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
615 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
617 virtio_queues_unbind_intr(dev);
619 if (intr_conf->lsc || intr_conf->rxq) {
620 rte_intr_disable(dev->intr_handle);
621 rte_intr_efd_disable(dev->intr_handle);
622 rte_free(dev->intr_handle->intr_vec);
623 dev->intr_handle->intr_vec = NULL;
627 virtio_dev_free_mbufs(dev);
628 virtio_free_queues(hw);
632 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
634 struct virtio_hw *hw = dev->data->dev_private;
635 struct virtio_pmd_ctrl ctrl;
639 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
640 PMD_INIT_LOG(INFO, "host does not support rx control");
644 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
645 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
649 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
651 PMD_INIT_LOG(ERR, "Failed to enable promisc");
655 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
657 struct virtio_hw *hw = dev->data->dev_private;
658 struct virtio_pmd_ctrl ctrl;
662 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
663 PMD_INIT_LOG(INFO, "host does not support rx control");
667 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
668 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
672 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
674 PMD_INIT_LOG(ERR, "Failed to disable promisc");
678 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
680 struct virtio_hw *hw = dev->data->dev_private;
681 struct virtio_pmd_ctrl ctrl;
685 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
686 PMD_INIT_LOG(INFO, "host does not support rx control");
690 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
691 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
695 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
697 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
701 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
703 struct virtio_hw *hw = dev->data->dev_private;
704 struct virtio_pmd_ctrl ctrl;
708 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
709 PMD_INIT_LOG(INFO, "host does not support rx control");
713 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
714 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
718 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
720 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
723 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */
725 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
727 struct virtio_hw *hw = dev->data->dev_private;
728 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
730 uint32_t frame_size = mtu + ether_hdr_len;
731 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
733 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
735 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
736 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
737 ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
744 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
746 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
747 struct virtqueue *vq = rxvq->vq;
749 virtqueue_enable_intr(vq);
754 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
756 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
757 struct virtqueue *vq = rxvq->vq;
759 virtqueue_disable_intr(vq);
764 * dev_ops for virtio, bare necessities for basic operation
766 static const struct eth_dev_ops virtio_eth_dev_ops = {
767 .dev_configure = virtio_dev_configure,
768 .dev_start = virtio_dev_start,
769 .dev_stop = virtio_dev_stop,
770 .dev_close = virtio_dev_close,
771 .promiscuous_enable = virtio_dev_promiscuous_enable,
772 .promiscuous_disable = virtio_dev_promiscuous_disable,
773 .allmulticast_enable = virtio_dev_allmulticast_enable,
774 .allmulticast_disable = virtio_dev_allmulticast_disable,
775 .mtu_set = virtio_mtu_set,
776 .dev_infos_get = virtio_dev_info_get,
777 .stats_get = virtio_dev_stats_get,
778 .xstats_get = virtio_dev_xstats_get,
779 .xstats_get_names = virtio_dev_xstats_get_names,
780 .stats_reset = virtio_dev_stats_reset,
781 .xstats_reset = virtio_dev_stats_reset,
782 .link_update = virtio_dev_link_update,
783 .vlan_offload_set = virtio_dev_vlan_offload_set,
784 .rx_queue_setup = virtio_dev_rx_queue_setup,
785 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable,
786 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable,
787 .rx_queue_release = virtio_dev_queue_release,
788 .rx_descriptor_done = virtio_dev_rx_queue_done,
789 .tx_queue_setup = virtio_dev_tx_queue_setup,
790 .tx_queue_release = virtio_dev_queue_release,
791 /* collect stats per queue */
792 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
793 .vlan_filter_set = virtio_vlan_filter_set,
794 .mac_addr_add = virtio_mac_addr_add,
795 .mac_addr_remove = virtio_mac_addr_remove,
796 .mac_addr_set = virtio_mac_addr_set,
800 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
801 struct rte_eth_link *link)
803 struct rte_eth_link *dst = link;
804 struct rte_eth_link *src = &(dev->data->dev_link);
806 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
807 *(uint64_t *)src) == 0)
814 * Atomically writes the link status information into global
815 * structure rte_eth_dev.
818 * - Pointer to the structure rte_eth_dev to read from.
819 * - Pointer to the buffer to be saved with the link status.
822 * - On success, zero.
823 * - On failure, negative value.
826 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
827 struct rte_eth_link *link)
829 struct rte_eth_link *dst = &(dev->data->dev_link);
830 struct rte_eth_link *src = link;
832 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
833 *(uint64_t *)src) == 0)
840 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
844 for (i = 0; i < dev->data->nb_tx_queues; i++) {
845 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
849 stats->opackets += txvq->stats.packets;
850 stats->obytes += txvq->stats.bytes;
851 stats->oerrors += txvq->stats.errors;
853 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
854 stats->q_opackets[i] = txvq->stats.packets;
855 stats->q_obytes[i] = txvq->stats.bytes;
859 for (i = 0; i < dev->data->nb_rx_queues; i++) {
860 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
864 stats->ipackets += rxvq->stats.packets;
865 stats->ibytes += rxvq->stats.bytes;
866 stats->ierrors += rxvq->stats.errors;
868 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
869 stats->q_ipackets[i] = rxvq->stats.packets;
870 stats->q_ibytes[i] = rxvq->stats.bytes;
874 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
877 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
878 struct rte_eth_xstat_name *xstats_names,
879 __rte_unused unsigned limit)
885 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
886 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
888 if (xstats_names != NULL) {
889 /* Note: limit checked in rte_eth_xstats_names() */
891 for (i = 0; i < dev->data->nb_rx_queues; i++) {
892 struct virtqueue *rxvq = dev->data->rx_queues[i];
895 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
896 snprintf(xstats_names[count].name,
897 sizeof(xstats_names[count].name),
899 rte_virtio_rxq_stat_strings[t].name);
904 for (i = 0; i < dev->data->nb_tx_queues; i++) {
905 struct virtqueue *txvq = dev->data->tx_queues[i];
908 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
909 snprintf(xstats_names[count].name,
910 sizeof(xstats_names[count].name),
912 rte_virtio_txq_stat_strings[t].name);
922 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
928 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
929 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
934 for (i = 0; i < dev->data->nb_rx_queues; i++) {
935 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
942 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
943 xstats[count].value = *(uint64_t *)(((char *)rxvq) +
944 rte_virtio_rxq_stat_strings[t].offset);
945 xstats[count].id = count;
950 for (i = 0; i < dev->data->nb_tx_queues; i++) {
951 struct virtnet_tx *txvq = dev->data->tx_queues[i];
958 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
959 xstats[count].value = *(uint64_t *)(((char *)txvq) +
960 rte_virtio_txq_stat_strings[t].offset);
961 xstats[count].id = count;
970 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
972 virtio_update_stats(dev, stats);
978 virtio_dev_stats_reset(struct rte_eth_dev *dev)
982 for (i = 0; i < dev->data->nb_tx_queues; i++) {
983 struct virtnet_tx *txvq = dev->data->tx_queues[i];
987 txvq->stats.packets = 0;
988 txvq->stats.bytes = 0;
989 txvq->stats.errors = 0;
990 txvq->stats.multicast = 0;
991 txvq->stats.broadcast = 0;
992 memset(txvq->stats.size_bins, 0,
993 sizeof(txvq->stats.size_bins[0]) * 8);
996 for (i = 0; i < dev->data->nb_rx_queues; i++) {
997 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1001 rxvq->stats.packets = 0;
1002 rxvq->stats.bytes = 0;
1003 rxvq->stats.errors = 0;
1004 rxvq->stats.multicast = 0;
1005 rxvq->stats.broadcast = 0;
1006 memset(rxvq->stats.size_bins, 0,
1007 sizeof(rxvq->stats.size_bins[0]) * 8);
1012 virtio_set_hwaddr(struct virtio_hw *hw)
1014 vtpci_write_dev_config(hw,
1015 offsetof(struct virtio_net_config, mac),
1016 &hw->mac_addr, ETHER_ADDR_LEN);
1020 virtio_get_hwaddr(struct virtio_hw *hw)
1022 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1023 vtpci_read_dev_config(hw,
1024 offsetof(struct virtio_net_config, mac),
1025 &hw->mac_addr, ETHER_ADDR_LEN);
1027 eth_random_addr(&hw->mac_addr[0]);
1028 virtio_set_hwaddr(hw);
1033 virtio_mac_table_set(struct virtio_hw *hw,
1034 const struct virtio_net_ctrl_mac *uc,
1035 const struct virtio_net_ctrl_mac *mc)
1037 struct virtio_pmd_ctrl ctrl;
1040 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1041 PMD_DRV_LOG(INFO, "host does not support mac table");
1045 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1046 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1048 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1049 memcpy(ctrl.data, uc, len[0]);
1051 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1052 memcpy(ctrl.data + len[0], mc, len[1]);
1054 err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1056 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1061 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1062 uint32_t index, uint32_t vmdq __rte_unused)
1064 struct virtio_hw *hw = dev->data->dev_private;
1065 const struct ether_addr *addrs = dev->data->mac_addrs;
1067 struct virtio_net_ctrl_mac *uc, *mc;
1069 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1070 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1074 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1076 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1079 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1080 const struct ether_addr *addr
1081 = (i == index) ? mac_addr : addrs + i;
1082 struct virtio_net_ctrl_mac *tbl
1083 = is_multicast_ether_addr(addr) ? mc : uc;
1085 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1088 return virtio_mac_table_set(hw, uc, mc);
1092 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1094 struct virtio_hw *hw = dev->data->dev_private;
1095 struct ether_addr *addrs = dev->data->mac_addrs;
1096 struct virtio_net_ctrl_mac *uc, *mc;
1099 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1100 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1104 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1106 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1109 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1110 struct virtio_net_ctrl_mac *tbl;
1112 if (i == index || is_zero_ether_addr(addrs + i))
1115 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1116 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1119 virtio_mac_table_set(hw, uc, mc);
1123 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1125 struct virtio_hw *hw = dev->data->dev_private;
1127 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1129 /* Use atomic update if available */
1130 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1131 struct virtio_pmd_ctrl ctrl;
1132 int len = ETHER_ADDR_LEN;
1134 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1135 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1137 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1138 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1139 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1140 virtio_set_hwaddr(hw);
1144 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1146 struct virtio_hw *hw = dev->data->dev_private;
1147 struct virtio_pmd_ctrl ctrl;
1150 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1153 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1154 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1155 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1156 len = sizeof(vlan_id);
1158 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1162 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1164 uint64_t host_features;
1166 /* Prepare guest_features: feature that driver wants to support */
1167 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1170 /* Read device(host) feature bits */
1171 host_features = VTPCI_OPS(hw)->get_features(hw);
1172 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1175 /* If supported, ensure MTU value is valid before acknowledging it. */
1176 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1177 struct virtio_net_config config;
1179 vtpci_read_dev_config(hw,
1180 offsetof(struct virtio_net_config, mtu),
1181 &config.mtu, sizeof(config.mtu));
1183 if (config.mtu < ETHER_MIN_MTU)
1184 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1188 * Negotiate features: Subset of device feature bits are written back
1189 * guest feature bits.
1191 hw->guest_features = req_features;
1192 hw->guest_features = vtpci_negotiate_features(hw, host_features);
1193 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1194 hw->guest_features);
1197 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1199 "VIRTIO_F_VERSION_1 features is not enabled.");
1202 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1203 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1205 "failed to set FEATURES_OK status!");
1210 hw->req_guest_features = req_features;
1216 * Process Virtio Config changed interrupt and call the callback
1217 * if link state changed.
1220 virtio_interrupt_handler(void *param)
1222 struct rte_eth_dev *dev = param;
1223 struct virtio_hw *hw = dev->data->dev_private;
1226 /* Read interrupt status which clears interrupt */
1227 isr = vtpci_isr(hw);
1228 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1230 if (rte_intr_enable(dev->intr_handle) < 0)
1231 PMD_DRV_LOG(ERR, "interrupt enable failed");
1233 if (isr & VIRTIO_PCI_ISR_CONFIG) {
1234 if (virtio_dev_link_update(dev, 0) == 0)
1235 _rte_eth_dev_callback_process(dev,
1236 RTE_ETH_EVENT_INTR_LSC,
1242 /* set rx and tx handlers according to what is supported */
1244 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1246 struct virtio_hw *hw = eth_dev->data->dev_private;
1248 if (hw->use_simple_rx) {
1249 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1250 eth_dev->data->port_id);
1251 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1252 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1254 "virtio: using mergeable buffer Rx path on port %u",
1255 eth_dev->data->port_id);
1256 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1258 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1259 eth_dev->data->port_id);
1260 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1263 if (hw->use_simple_tx) {
1264 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1265 eth_dev->data->port_id);
1266 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1268 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1269 eth_dev->data->port_id);
1270 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1274 /* Only support 1:1 queue/interrupt mapping so far.
1275 * TODO: support n:1 queue/interrupt mapping when there are limited number of
1276 * interrupt vectors (<N+1).
1279 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1282 struct virtio_hw *hw = dev->data->dev_private;
1284 PMD_INIT_LOG(INFO, "queue/interrupt binding");
1285 for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1286 dev->intr_handle->intr_vec[i] = i + 1;
1287 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1288 VIRTIO_MSI_NO_VECTOR) {
1289 PMD_DRV_LOG(ERR, "failed to set queue vector");
1298 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1301 struct virtio_hw *hw = dev->data->dev_private;
1303 PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1304 for (i = 0; i < dev->data->nb_rx_queues; ++i)
1305 VTPCI_OPS(hw)->set_queue_irq(hw,
1306 hw->vqs[i * VTNET_CQ],
1307 VIRTIO_MSI_NO_VECTOR);
1311 virtio_configure_intr(struct rte_eth_dev *dev)
1313 struct virtio_hw *hw = dev->data->dev_private;
1315 if (!rte_intr_cap_multiple(dev->intr_handle)) {
1316 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1320 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1321 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1325 if (!dev->intr_handle->intr_vec) {
1326 dev->intr_handle->intr_vec =
1327 rte_zmalloc("intr_vec",
1328 hw->max_queue_pairs * sizeof(int), 0);
1329 if (!dev->intr_handle->intr_vec) {
1330 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1331 hw->max_queue_pairs);
1336 /* Re-register callback to update max_intr */
1337 rte_intr_callback_unregister(dev->intr_handle,
1338 virtio_interrupt_handler,
1340 rte_intr_callback_register(dev->intr_handle,
1341 virtio_interrupt_handler,
1344 /* DO NOT try to remove this! This function will enable msix, or QEMU
1345 * will encounter SIGSEGV when DRIVER_OK is sent.
1346 * And for legacy devices, this should be done before queue/vec binding
1347 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1348 * (22) will be ignored.
1350 if (rte_intr_enable(dev->intr_handle) < 0) {
1351 PMD_DRV_LOG(ERR, "interrupt enable failed");
1355 if (virtio_queues_bind_intr(dev) < 0) {
1356 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1363 /* reset device and renegotiate features if needed */
1365 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1367 struct virtio_hw *hw = eth_dev->data->dev_private;
1368 struct virtio_net_config *config;
1369 struct virtio_net_config local_config;
1370 struct rte_pci_device *pci_dev = NULL;
1373 /* Reset the device although not necessary at startup */
1376 /* Tell the host we've noticed this device. */
1377 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1379 /* Tell the host we've known how to drive the device. */
1380 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1381 if (virtio_negotiate_features(hw, req_features) < 0)
1384 if (!hw->virtio_user_dev) {
1385 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1386 rte_eth_copy_pci_info(eth_dev, pci_dev);
1389 /* If host does not support both status and MSI-X then disable LSC */
1390 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1391 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1393 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1395 /* Setting up rx_header size for the device */
1396 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1397 vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1398 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1400 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1402 /* Copy the permanent MAC address to: virtio_hw */
1403 virtio_get_hwaddr(hw);
1404 ether_addr_copy((struct ether_addr *) hw->mac_addr,
1405 ð_dev->data->mac_addrs[0]);
1407 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1408 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1409 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1411 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1412 config = &local_config;
1414 vtpci_read_dev_config(hw,
1415 offsetof(struct virtio_net_config, mac),
1416 &config->mac, sizeof(config->mac));
1418 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1419 vtpci_read_dev_config(hw,
1420 offsetof(struct virtio_net_config, status),
1421 &config->status, sizeof(config->status));
1424 "VIRTIO_NET_F_STATUS is not supported");
1428 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1429 vtpci_read_dev_config(hw,
1430 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1431 &config->max_virtqueue_pairs,
1432 sizeof(config->max_virtqueue_pairs));
1435 "VIRTIO_NET_F_MQ is not supported");
1436 config->max_virtqueue_pairs = 1;
1439 hw->max_queue_pairs = config->max_virtqueue_pairs;
1441 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1442 vtpci_read_dev_config(hw,
1443 offsetof(struct virtio_net_config, mtu),
1445 sizeof(config->mtu));
1448 * MTU value has already been checked at negotiation
1449 * time, but check again in case it has changed since
1450 * then, which should not happen.
1452 if (config->mtu < ETHER_MIN_MTU) {
1453 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1458 hw->max_mtu = config->mtu;
1459 /* Set initial MTU to maximum one supported by vhost */
1460 eth_dev->data->mtu = config->mtu;
1463 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1464 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1467 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1468 config->max_virtqueue_pairs);
1469 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1471 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1472 config->mac[0], config->mac[1],
1473 config->mac[2], config->mac[3],
1474 config->mac[4], config->mac[5]);
1476 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1477 hw->max_queue_pairs = 1;
1480 ret = virtio_alloc_queues(eth_dev);
1484 if (eth_dev->data->dev_conf.intr_conf.rxq) {
1485 if (virtio_configure_intr(eth_dev) < 0) {
1486 PMD_INIT_LOG(ERR, "failed to configure interrupt");
1491 vtpci_reinit_complete(hw);
1494 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1495 eth_dev->data->port_id, pci_dev->id.vendor_id,
1496 pci_dev->id.device_id);
1502 * Remap the PCI device again (IO port map for legacy device and
1503 * memory map for modern device), so that the secondary process
1504 * could have the PCI initiated correctly.
1507 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1511 * We don't have to re-parse the PCI config space, since
1512 * rte_pci_map_device() makes sure the mapped address
1513 * in secondary process would equal to the one mapped in
1514 * the primary process: error will be returned if that
1515 * requirement is not met.
1517 * That said, we could simply reuse all cap pointers
1518 * (such as dev_cfg, common_cfg, etc.) parsed from the
1519 * primary process, which is stored in shared memory.
1521 if (rte_pci_map_device(pci_dev)) {
1522 PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1526 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1534 virtio_set_vtpci_ops(struct virtio_hw *hw)
1536 #ifdef RTE_VIRTIO_USER
1537 if (hw->virtio_user_dev)
1538 VTPCI_OPS(hw) = &virtio_user_ops;
1542 VTPCI_OPS(hw) = &modern_ops;
1544 VTPCI_OPS(hw) = &legacy_ops;
1548 * This function is based on probe() function in virtio_pci.c
1549 * It returns 0 on success.
1552 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1554 struct virtio_hw *hw = eth_dev->data->dev_private;
1557 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1559 eth_dev->dev_ops = &virtio_eth_dev_ops;
1561 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1562 if (!hw->virtio_user_dev) {
1563 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1568 virtio_set_vtpci_ops(hw);
1569 set_rxtx_funcs(eth_dev);
1574 /* Allocate memory for storing MAC addresses */
1575 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1576 if (eth_dev->data->mac_addrs == NULL) {
1578 "Failed to allocate %d bytes needed to store MAC addresses",
1579 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1583 hw->port_id = eth_dev->data->port_id;
1584 /* For virtio_user case the hw->virtio_user_dev is populated by
1585 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1587 if (!hw->virtio_user_dev) {
1588 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1593 /* reset device and negotiate default features */
1594 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1598 /* Setup interrupt callback */
1599 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1600 rte_intr_callback_register(eth_dev->intr_handle,
1601 virtio_interrupt_handler, eth_dev);
1607 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1609 PMD_INIT_FUNC_TRACE();
1611 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1614 virtio_dev_stop(eth_dev);
1615 virtio_dev_close(eth_dev);
1617 eth_dev->dev_ops = NULL;
1618 eth_dev->tx_pkt_burst = NULL;
1619 eth_dev->rx_pkt_burst = NULL;
1621 rte_free(eth_dev->data->mac_addrs);
1622 eth_dev->data->mac_addrs = NULL;
1624 /* reset interrupt callback */
1625 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1626 rte_intr_callback_unregister(eth_dev->intr_handle,
1627 virtio_interrupt_handler,
1629 if (eth_dev->device)
1630 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1632 PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1637 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1638 struct rte_pci_device *pci_dev)
1640 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1641 eth_virtio_dev_init);
1644 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1646 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1649 static struct rte_pci_driver rte_virtio_pmd = {
1651 .name = "net_virtio",
1653 .id_table = pci_id_virtio_map,
1655 .probe = eth_virtio_pci_probe,
1656 .remove = eth_virtio_pci_remove,
1659 RTE_INIT(rte_virtio_pmd_init);
1661 rte_virtio_pmd_init(void)
1663 if (rte_eal_iopl_init() != 0) {
1664 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1668 rte_pci_register(&rte_virtio_pmd);
1672 * Configure virtio device
1673 * It returns 0 on success.
1676 virtio_dev_configure(struct rte_eth_dev *dev)
1678 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1679 struct virtio_hw *hw = dev->data->dev_private;
1680 uint64_t req_features;
1683 PMD_INIT_LOG(DEBUG, "configure");
1684 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1686 if (dev->data->dev_conf.intr_conf.rxq) {
1687 ret = virtio_init_device(dev, hw->req_guest_features);
1692 /* The name hw_ip_checksum is a bit confusing since it can be
1693 * set by the application to request L3 and/or L4 checksums. In
1694 * case of virtio, only L4 checksum is supported.
1696 if (rxmode->hw_ip_checksum)
1697 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1699 if (rxmode->enable_lro)
1701 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1702 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1704 /* if request features changed, reinit the device */
1705 if (req_features != hw->req_guest_features) {
1706 ret = virtio_init_device(dev, req_features);
1711 if (rxmode->hw_ip_checksum &&
1712 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1714 "rx checksum not available on this host");
1718 if (rxmode->enable_lro &&
1719 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1720 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1722 "Large Receive Offload not available on this host");
1726 /* start control queue */
1727 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1728 virtio_dev_cq_start(dev);
1730 hw->vlan_strip = rxmode->hw_vlan_strip;
1732 if (rxmode->hw_vlan_filter
1733 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1735 "vlan filtering not available on this host");
1739 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1740 /* Enable vector (0) for Link State Intrerrupt */
1741 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1742 VIRTIO_MSI_NO_VECTOR) {
1743 PMD_DRV_LOG(ERR, "failed to set config vector");
1747 hw->use_simple_rx = 1;
1748 hw->use_simple_tx = 1;
1750 #if defined RTE_ARCH_ARM64 || defined CONFIG_RTE_ARCH_ARM
1751 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1752 hw->use_simple_rx = 0;
1753 hw->use_simple_tx = 0;
1756 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1757 hw->use_simple_rx = 0;
1758 hw->use_simple_tx = 0;
1761 if (rxmode->hw_ip_checksum)
1762 hw->use_simple_rx = 0;
1769 virtio_dev_start(struct rte_eth_dev *dev)
1771 uint16_t nb_queues, i;
1772 struct virtnet_rx *rxvq;
1773 struct virtnet_tx *txvq __rte_unused;
1774 struct virtio_hw *hw = dev->data->dev_private;
1777 /* Finish the initialization of the queues */
1778 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1779 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1783 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1784 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1789 /* check if lsc interrupt feature is enabled */
1790 if (dev->data->dev_conf.intr_conf.lsc) {
1791 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1792 PMD_DRV_LOG(ERR, "link status not supported by host");
1797 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1798 * in device configure, but it could be unmapped when device is
1801 if (dev->data->dev_conf.intr_conf.lsc ||
1802 dev->data->dev_conf.intr_conf.rxq) {
1803 rte_intr_disable(dev->intr_handle);
1805 if (rte_intr_enable(dev->intr_handle) < 0) {
1806 PMD_DRV_LOG(ERR, "interrupt enable failed");
1811 /*Notify the backend
1812 *Otherwise the tap backend might already stop its queue due to fullness.
1813 *vhost backend will have no chance to be waked up
1815 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1816 if (hw->max_queue_pairs > 1) {
1817 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1821 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1823 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1824 rxvq = dev->data->rx_queues[i];
1825 /* Flush the old packets */
1826 virtqueue_flush(rxvq->vq);
1827 virtqueue_notify(rxvq->vq);
1830 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1831 txvq = dev->data->tx_queues[i];
1832 virtqueue_notify(txvq->vq);
1835 PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1837 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1838 rxvq = dev->data->rx_queues[i];
1839 VIRTQUEUE_DUMP(rxvq->vq);
1842 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1843 txvq = dev->data->tx_queues[i];
1844 VIRTQUEUE_DUMP(txvq->vq);
1847 set_rxtx_funcs(dev);
1850 /* Initialize Link state */
1851 virtio_dev_link_update(dev, 0);
1856 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1858 struct rte_mbuf *buf;
1859 int i, mbuf_num = 0;
1861 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1862 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1865 "Before freeing rxq[%d] used and unused buf", i);
1866 VIRTQUEUE_DUMP(rxvq->vq);
1868 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1869 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1870 rte_pktmbuf_free(buf);
1874 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1876 "After freeing rxq[%d] used and unused buf", i);
1877 VIRTQUEUE_DUMP(rxvq->vq);
1880 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1881 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1884 "Before freeing txq[%d] used and unused bufs",
1886 VIRTQUEUE_DUMP(txvq->vq);
1889 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1890 rte_pktmbuf_free(buf);
1894 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1896 "After freeing txq[%d] used and unused buf", i);
1897 VIRTQUEUE_DUMP(txvq->vq);
1902 * Stop device: disable interrupt and mark link down
1905 virtio_dev_stop(struct rte_eth_dev *dev)
1907 struct virtio_hw *hw = dev->data->dev_private;
1908 struct rte_eth_link link;
1909 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1911 PMD_INIT_LOG(DEBUG, "stop");
1913 if (intr_conf->lsc || intr_conf->rxq)
1914 rte_intr_disable(dev->intr_handle);
1917 memset(&link, 0, sizeof(link));
1918 virtio_dev_atomic_write_link_status(dev, &link);
1922 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1924 struct rte_eth_link link, old;
1926 struct virtio_hw *hw = dev->data->dev_private;
1927 memset(&link, 0, sizeof(link));
1928 virtio_dev_atomic_read_link_status(dev, &link);
1930 link.link_duplex = ETH_LINK_FULL_DUPLEX;
1931 link.link_speed = SPEED_10G;
1933 if (hw->started == 0) {
1934 link.link_status = ETH_LINK_DOWN;
1935 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1936 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1937 vtpci_read_dev_config(hw,
1938 offsetof(struct virtio_net_config, status),
1939 &status, sizeof(status));
1940 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1941 link.link_status = ETH_LINK_DOWN;
1942 PMD_INIT_LOG(DEBUG, "Port %d is down",
1943 dev->data->port_id);
1945 link.link_status = ETH_LINK_UP;
1946 PMD_INIT_LOG(DEBUG, "Port %d is up",
1947 dev->data->port_id);
1950 link.link_status = ETH_LINK_UP;
1952 virtio_dev_atomic_write_link_status(dev, &link);
1954 return (old.link_status == link.link_status) ? -1 : 0;
1958 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1960 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1961 struct virtio_hw *hw = dev->data->dev_private;
1963 if (mask & ETH_VLAN_FILTER_MASK) {
1964 if (rxmode->hw_vlan_filter &&
1965 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1968 "vlan filtering not available on this host");
1974 if (mask & ETH_VLAN_STRIP_MASK)
1975 hw->vlan_strip = rxmode->hw_vlan_strip;
1981 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1983 uint64_t tso_mask, host_features;
1984 struct virtio_hw *hw = dev->data->dev_private;
1986 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1988 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
1989 dev_info->max_rx_queues =
1990 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1991 dev_info->max_tx_queues =
1992 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1993 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1994 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1995 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1996 dev_info->default_txconf = (struct rte_eth_txconf) {
1997 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2000 host_features = VTPCI_OPS(hw)->get_features(hw);
2001 dev_info->rx_offload_capa = 0;
2002 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2003 dev_info->rx_offload_capa |=
2004 DEV_RX_OFFLOAD_TCP_CKSUM |
2005 DEV_RX_OFFLOAD_UDP_CKSUM;
2007 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2008 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2009 if ((host_features & tso_mask) == tso_mask)
2010 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2012 dev_info->tx_offload_capa = 0;
2013 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2014 dev_info->tx_offload_capa |=
2015 DEV_TX_OFFLOAD_UDP_CKSUM |
2016 DEV_TX_OFFLOAD_TCP_CKSUM;
2018 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2019 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2020 if ((hw->guest_features & tso_mask) == tso_mask)
2021 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2025 * It enables testpmd to collect per queue stats.
2028 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2029 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2030 __rte_unused uint8_t is_rx)
2035 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2036 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2037 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");