4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
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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
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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
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24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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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);
77 static void virtio_set_hwaddr(struct virtio_hw *hw);
78 static void virtio_get_hwaddr(struct virtio_hw *hw);
80 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
81 struct rte_eth_stats *stats);
82 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
83 struct rte_eth_xstat *xstats, unsigned n);
84 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
85 struct rte_eth_xstat_name *xstats_names,
87 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
88 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
89 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
90 uint16_t vlan_id, int on);
91 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
92 struct ether_addr *mac_addr,
93 uint32_t index, uint32_t vmdq);
94 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
95 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
96 struct ether_addr *mac_addr);
98 static int virtio_dev_queue_stats_mapping_set(
99 struct rte_eth_dev *eth_dev,
105 * The set of PCI devices this driver supports
107 static const struct rte_pci_id pci_id_virtio_map[] = {
108 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
109 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
110 { .vendor_id = 0, /* sentinel */ },
113 struct rte_virtio_xstats_name_off {
114 char name[RTE_ETH_XSTATS_NAME_SIZE];
118 /* [rt]x_qX_ is prepended to the name string here */
119 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
120 {"good_packets", offsetof(struct virtnet_rx, stats.packets)},
121 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)},
122 {"errors", offsetof(struct virtnet_rx, stats.errors)},
123 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)},
124 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)},
125 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])},
126 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])},
127 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])},
128 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])},
129 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])},
130 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])},
131 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
132 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])},
135 /* [rt]x_qX_ is prepended to the name string here */
136 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
137 {"good_packets", offsetof(struct virtnet_tx, stats.packets)},
138 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)},
139 {"errors", offsetof(struct virtnet_tx, stats.errors)},
140 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)},
141 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)},
142 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])},
143 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])},
144 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])},
145 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])},
146 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])},
147 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])},
148 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
149 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])},
152 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
153 sizeof(rte_virtio_rxq_stat_strings[0]))
154 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
155 sizeof(rte_virtio_txq_stat_strings[0]))
157 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
160 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
161 int *dlen, int pkt_num)
165 virtio_net_ctrl_ack status = ~0;
166 struct virtio_pmd_ctrl *result;
167 struct virtqueue *vq;
169 ctrl->status = status;
171 if (!cvq || !cvq->vq) {
172 PMD_INIT_LOG(ERR, "Control queue is not supported.");
176 head = vq->vq_desc_head_idx;
178 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
179 "vq->hw->cvq = %p vq = %p",
180 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
182 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
185 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
186 sizeof(struct virtio_pmd_ctrl));
189 * Format is enforced in qemu code:
190 * One TX packet for header;
191 * At least one TX packet per argument;
192 * One RX packet for ACK.
194 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
195 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
196 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
198 i = vq->vq_ring.desc[head].next;
200 for (k = 0; k < pkt_num; k++) {
201 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
202 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
203 + sizeof(struct virtio_net_ctrl_hdr)
204 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
205 vq->vq_ring.desc[i].len = dlen[k];
208 i = vq->vq_ring.desc[i].next;
211 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
212 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
213 + sizeof(struct virtio_net_ctrl_hdr);
214 vq->vq_ring.desc[i].len = sizeof(ctrl->status);
217 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
219 vq_update_avail_ring(vq, head);
220 vq_update_avail_idx(vq);
222 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
224 virtqueue_notify(vq);
227 while (VIRTQUEUE_NUSED(vq) == 0) {
232 while (VIRTQUEUE_NUSED(vq)) {
233 uint32_t idx, desc_idx, used_idx;
234 struct vring_used_elem *uep;
236 used_idx = (uint32_t)(vq->vq_used_cons_idx
237 & (vq->vq_nentries - 1));
238 uep = &vq->vq_ring.used->ring[used_idx];
239 idx = (uint32_t) uep->id;
242 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
243 desc_idx = vq->vq_ring.desc[desc_idx].next;
247 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
248 vq->vq_desc_head_idx = idx;
250 vq->vq_used_cons_idx++;
254 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
255 vq->vq_free_cnt, vq->vq_desc_head_idx);
257 result = cvq->virtio_net_hdr_mz->addr;
259 return result->status;
263 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
265 struct virtio_hw *hw = dev->data->dev_private;
266 struct virtio_pmd_ctrl ctrl;
270 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
271 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
272 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
274 dlen[0] = sizeof(uint16_t);
276 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
278 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
279 "failed, this is too late now...");
287 virtio_dev_queue_release(void *queue __rte_unused)
293 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
295 if (vtpci_queue_idx == hw->max_queue_pairs * 2)
297 else if (vtpci_queue_idx % 2 == 0)
304 virtio_get_nr_vq(struct virtio_hw *hw)
306 uint16_t nr_vq = hw->max_queue_pairs * 2;
308 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
315 virtio_init_vring(struct virtqueue *vq)
317 int size = vq->vq_nentries;
318 struct vring *vr = &vq->vq_ring;
319 uint8_t *ring_mem = vq->vq_ring_virt_mem;
321 PMD_INIT_FUNC_TRACE();
324 * Reinitialise since virtio port might have been stopped and restarted
326 memset(ring_mem, 0, vq->vq_ring_size);
327 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
328 vq->vq_used_cons_idx = 0;
329 vq->vq_desc_head_idx = 0;
330 vq->vq_avail_idx = 0;
331 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
332 vq->vq_free_cnt = vq->vq_nentries;
333 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
335 vring_desc_init(vr->desc, size);
338 * Disable device(host) interrupting guest
340 virtqueue_disable_intr(vq);
344 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
346 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
347 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
348 const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
349 unsigned int vq_size, size;
350 struct virtio_hw *hw = dev->data->dev_private;
351 struct virtnet_rx *rxvq = NULL;
352 struct virtnet_tx *txvq = NULL;
353 struct virtnet_ctl *cvq = NULL;
354 struct virtqueue *vq;
355 size_t sz_hdr_mz = 0;
356 void *sw_ring = NULL;
357 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
360 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
363 * Read the virtqueue size from the Queue Size field
364 * Always power of 2 and if 0 virtqueue does not exist
366 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
367 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
369 PMD_INIT_LOG(ERR, "virtqueue does not exist");
373 if (!rte_is_power_of_2(vq_size)) {
374 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
378 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
379 dev->data->port_id, vtpci_queue_idx);
381 size = RTE_ALIGN_CEIL(sizeof(*vq) +
382 vq_size * sizeof(struct vq_desc_extra),
383 RTE_CACHE_LINE_SIZE);
384 if (queue_type == VTNET_TQ) {
386 * For each xmit packet, allocate a virtio_net_hdr
387 * and indirect ring elements
389 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
390 } else if (queue_type == VTNET_CQ) {
391 /* Allocate a page for control vq command, data and status */
392 sz_hdr_mz = PAGE_SIZE;
395 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
398 PMD_INIT_LOG(ERR, "can not allocate vq");
401 hw->vqs[vtpci_queue_idx] = vq;
404 vq->vq_queue_index = vtpci_queue_idx;
405 vq->vq_nentries = vq_size;
408 * Reserve a memzone for vring elements
410 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
411 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
412 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
413 size, vq->vq_ring_size);
415 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
417 0, VIRTIO_PCI_VRING_ALIGN);
419 if (rte_errno == EEXIST)
420 mz = rte_memzone_lookup(vq_name);
427 memset(mz->addr, 0, mz->len);
429 vq->vq_ring_mem = mz->phys_addr;
430 vq->vq_ring_virt_mem = mz->addr;
431 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64,
432 (uint64_t)mz->phys_addr);
433 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
434 (uint64_t)(uintptr_t)mz->addr);
436 virtio_init_vring(vq);
439 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
440 dev->data->port_id, vtpci_queue_idx);
441 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
443 RTE_CACHE_LINE_SIZE);
444 if (hdr_mz == NULL) {
445 if (rte_errno == EEXIST)
446 hdr_mz = rte_memzone_lookup(vq_hdr_name);
447 if (hdr_mz == NULL) {
454 if (queue_type == VTNET_RQ) {
455 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
456 sizeof(vq->sw_ring[0]);
458 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
459 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
461 PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
466 vq->sw_ring = sw_ring;
469 rxvq->port_id = dev->data->port_id;
471 } else if (queue_type == VTNET_TQ) {
474 txvq->port_id = dev->data->port_id;
476 txvq->virtio_net_hdr_mz = hdr_mz;
477 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
478 } else if (queue_type == VTNET_CQ) {
482 cvq->virtio_net_hdr_mz = hdr_mz;
483 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
484 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
489 /* For virtio_user case (that is when hw->dev is NULL), we use
490 * virtual address. And we need properly set _offset_, please see
491 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
493 if (!hw->virtio_user_dev)
494 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
496 vq->vq_ring_mem = (uintptr_t)mz->addr;
497 vq->offset = offsetof(struct rte_mbuf, buf_addr);
498 if (queue_type == VTNET_TQ)
499 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
500 else if (queue_type == VTNET_CQ)
501 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
504 if (queue_type == VTNET_TQ) {
505 struct virtio_tx_region *txr;
509 memset(txr, 0, vq_size * sizeof(*txr));
510 for (i = 0; i < vq_size; i++) {
511 struct vring_desc *start_dp = txr[i].tx_indir;
513 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
515 /* first indirect descriptor is always the tx header */
516 start_dp->addr = txvq->virtio_net_hdr_mem
518 + offsetof(struct virtio_tx_region, tx_hdr);
520 start_dp->len = hw->vtnet_hdr_size;
521 start_dp->flags = VRING_DESC_F_NEXT;
525 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
526 PMD_INIT_LOG(ERR, "setup_queue failed");
534 rte_memzone_free(hdr_mz);
535 rte_memzone_free(mz);
542 virtio_free_queues(struct virtio_hw *hw)
544 uint16_t nr_vq = virtio_get_nr_vq(hw);
545 struct virtqueue *vq;
552 for (i = 0; i < nr_vq; i++) {
557 queue_type = virtio_get_queue_type(hw, i);
558 if (queue_type == VTNET_RQ) {
559 rte_free(vq->sw_ring);
560 rte_memzone_free(vq->rxq.mz);
561 } else if (queue_type == VTNET_TQ) {
562 rte_memzone_free(vq->txq.mz);
563 rte_memzone_free(vq->txq.virtio_net_hdr_mz);
565 rte_memzone_free(vq->cq.mz);
566 rte_memzone_free(vq->cq.virtio_net_hdr_mz);
578 virtio_alloc_queues(struct rte_eth_dev *dev)
580 struct virtio_hw *hw = dev->data->dev_private;
581 uint16_t nr_vq = virtio_get_nr_vq(hw);
585 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
587 PMD_INIT_LOG(ERR, "failed to allocate vqs");
591 for (i = 0; i < nr_vq; i++) {
592 ret = virtio_init_queue(dev, i);
594 virtio_free_queues(hw);
602 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
605 virtio_dev_close(struct rte_eth_dev *dev)
607 struct virtio_hw *hw = dev->data->dev_private;
608 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
610 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
613 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
614 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
616 virtio_queues_unbind_intr(dev);
618 if (intr_conf->lsc || intr_conf->rxq) {
619 rte_intr_disable(dev->intr_handle);
620 rte_intr_efd_disable(dev->intr_handle);
621 rte_free(dev->intr_handle->intr_vec);
622 dev->intr_handle->intr_vec = NULL;
626 virtio_dev_free_mbufs(dev);
627 virtio_free_queues(hw);
631 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
633 struct virtio_hw *hw = dev->data->dev_private;
634 struct virtio_pmd_ctrl ctrl;
638 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
639 PMD_INIT_LOG(INFO, "host does not support rx control");
643 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
644 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
648 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
650 PMD_INIT_LOG(ERR, "Failed to enable promisc");
654 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
656 struct virtio_hw *hw = dev->data->dev_private;
657 struct virtio_pmd_ctrl ctrl;
661 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
662 PMD_INIT_LOG(INFO, "host does not support rx control");
666 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
667 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
671 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
673 PMD_INIT_LOG(ERR, "Failed to disable promisc");
677 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
679 struct virtio_hw *hw = dev->data->dev_private;
680 struct virtio_pmd_ctrl ctrl;
684 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
685 PMD_INIT_LOG(INFO, "host does not support rx control");
689 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
690 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
694 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
696 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
700 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
702 struct virtio_hw *hw = dev->data->dev_private;
703 struct virtio_pmd_ctrl ctrl;
707 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
708 PMD_INIT_LOG(INFO, "host does not support rx control");
712 ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
713 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
717 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
719 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
722 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */
724 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
726 struct virtio_hw *hw = dev->data->dev_private;
727 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
729 uint32_t frame_size = mtu + ether_hdr_len;
730 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
732 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
734 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
735 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
736 ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
743 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
745 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
746 struct virtqueue *vq = rxvq->vq;
748 virtqueue_enable_intr(vq);
753 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
755 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
756 struct virtqueue *vq = rxvq->vq;
758 virtqueue_disable_intr(vq);
763 * dev_ops for virtio, bare necessities for basic operation
765 static const struct eth_dev_ops virtio_eth_dev_ops = {
766 .dev_configure = virtio_dev_configure,
767 .dev_start = virtio_dev_start,
768 .dev_stop = virtio_dev_stop,
769 .dev_close = virtio_dev_close,
770 .promiscuous_enable = virtio_dev_promiscuous_enable,
771 .promiscuous_disable = virtio_dev_promiscuous_disable,
772 .allmulticast_enable = virtio_dev_allmulticast_enable,
773 .allmulticast_disable = virtio_dev_allmulticast_disable,
774 .mtu_set = virtio_mtu_set,
775 .dev_infos_get = virtio_dev_info_get,
776 .stats_get = virtio_dev_stats_get,
777 .xstats_get = virtio_dev_xstats_get,
778 .xstats_get_names = virtio_dev_xstats_get_names,
779 .stats_reset = virtio_dev_stats_reset,
780 .xstats_reset = virtio_dev_stats_reset,
781 .link_update = virtio_dev_link_update,
782 .rx_queue_setup = virtio_dev_rx_queue_setup,
783 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable,
784 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable,
785 .rx_queue_release = virtio_dev_queue_release,
786 .rx_descriptor_done = virtio_dev_rx_queue_done,
787 .tx_queue_setup = virtio_dev_tx_queue_setup,
788 .tx_queue_release = virtio_dev_queue_release,
789 /* collect stats per queue */
790 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
791 .vlan_filter_set = virtio_vlan_filter_set,
792 .mac_addr_add = virtio_mac_addr_add,
793 .mac_addr_remove = virtio_mac_addr_remove,
794 .mac_addr_set = virtio_mac_addr_set,
798 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
799 struct rte_eth_link *link)
801 struct rte_eth_link *dst = link;
802 struct rte_eth_link *src = &(dev->data->dev_link);
804 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
805 *(uint64_t *)src) == 0)
812 * Atomically writes the link status information into global
813 * structure rte_eth_dev.
816 * - Pointer to the structure rte_eth_dev to read from.
817 * - Pointer to the buffer to be saved with the link status.
820 * - On success, zero.
821 * - On failure, negative value.
824 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
825 struct rte_eth_link *link)
827 struct rte_eth_link *dst = &(dev->data->dev_link);
828 struct rte_eth_link *src = link;
830 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
831 *(uint64_t *)src) == 0)
838 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
842 for (i = 0; i < dev->data->nb_tx_queues; i++) {
843 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
847 stats->opackets += txvq->stats.packets;
848 stats->obytes += txvq->stats.bytes;
849 stats->oerrors += txvq->stats.errors;
851 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
852 stats->q_opackets[i] = txvq->stats.packets;
853 stats->q_obytes[i] = txvq->stats.bytes;
857 for (i = 0; i < dev->data->nb_rx_queues; i++) {
858 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
862 stats->ipackets += rxvq->stats.packets;
863 stats->ibytes += rxvq->stats.bytes;
864 stats->ierrors += rxvq->stats.errors;
866 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
867 stats->q_ipackets[i] = rxvq->stats.packets;
868 stats->q_ibytes[i] = rxvq->stats.bytes;
872 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
875 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
876 struct rte_eth_xstat_name *xstats_names,
877 __rte_unused unsigned limit)
883 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
884 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
886 if (xstats_names != NULL) {
887 /* Note: limit checked in rte_eth_xstats_names() */
889 for (i = 0; i < dev->data->nb_rx_queues; i++) {
890 struct virtqueue *rxvq = dev->data->rx_queues[i];
893 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
894 snprintf(xstats_names[count].name,
895 sizeof(xstats_names[count].name),
897 rte_virtio_rxq_stat_strings[t].name);
902 for (i = 0; i < dev->data->nb_tx_queues; i++) {
903 struct virtqueue *txvq = dev->data->tx_queues[i];
906 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
907 snprintf(xstats_names[count].name,
908 sizeof(xstats_names[count].name),
910 rte_virtio_txq_stat_strings[t].name);
920 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
926 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
927 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
932 for (i = 0; i < dev->data->nb_rx_queues; i++) {
933 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
940 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
941 xstats[count].value = *(uint64_t *)(((char *)rxvq) +
942 rte_virtio_rxq_stat_strings[t].offset);
943 xstats[count].id = count;
948 for (i = 0; i < dev->data->nb_tx_queues; i++) {
949 struct virtnet_tx *txvq = dev->data->tx_queues[i];
956 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
957 xstats[count].value = *(uint64_t *)(((char *)txvq) +
958 rte_virtio_txq_stat_strings[t].offset);
959 xstats[count].id = count;
968 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
970 virtio_update_stats(dev, stats);
976 virtio_dev_stats_reset(struct rte_eth_dev *dev)
980 for (i = 0; i < dev->data->nb_tx_queues; i++) {
981 struct virtnet_tx *txvq = dev->data->tx_queues[i];
985 txvq->stats.packets = 0;
986 txvq->stats.bytes = 0;
987 txvq->stats.errors = 0;
988 txvq->stats.multicast = 0;
989 txvq->stats.broadcast = 0;
990 memset(txvq->stats.size_bins, 0,
991 sizeof(txvq->stats.size_bins[0]) * 8);
994 for (i = 0; i < dev->data->nb_rx_queues; i++) {
995 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
999 rxvq->stats.packets = 0;
1000 rxvq->stats.bytes = 0;
1001 rxvq->stats.errors = 0;
1002 rxvq->stats.multicast = 0;
1003 rxvq->stats.broadcast = 0;
1004 memset(rxvq->stats.size_bins, 0,
1005 sizeof(rxvq->stats.size_bins[0]) * 8);
1010 virtio_set_hwaddr(struct virtio_hw *hw)
1012 vtpci_write_dev_config(hw,
1013 offsetof(struct virtio_net_config, mac),
1014 &hw->mac_addr, ETHER_ADDR_LEN);
1018 virtio_get_hwaddr(struct virtio_hw *hw)
1020 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1021 vtpci_read_dev_config(hw,
1022 offsetof(struct virtio_net_config, mac),
1023 &hw->mac_addr, ETHER_ADDR_LEN);
1025 eth_random_addr(&hw->mac_addr[0]);
1026 virtio_set_hwaddr(hw);
1031 virtio_mac_table_set(struct virtio_hw *hw,
1032 const struct virtio_net_ctrl_mac *uc,
1033 const struct virtio_net_ctrl_mac *mc)
1035 struct virtio_pmd_ctrl ctrl;
1038 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1039 PMD_DRV_LOG(INFO, "host does not support mac table");
1043 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1044 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1046 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1047 memcpy(ctrl.data, uc, len[0]);
1049 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1050 memcpy(ctrl.data + len[0], mc, len[1]);
1052 err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1054 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1059 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1060 uint32_t index, uint32_t vmdq __rte_unused)
1062 struct virtio_hw *hw = dev->data->dev_private;
1063 const struct ether_addr *addrs = dev->data->mac_addrs;
1065 struct virtio_net_ctrl_mac *uc, *mc;
1067 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1068 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1072 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1074 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1077 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1078 const struct ether_addr *addr
1079 = (i == index) ? mac_addr : addrs + i;
1080 struct virtio_net_ctrl_mac *tbl
1081 = is_multicast_ether_addr(addr) ? mc : uc;
1083 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1086 return virtio_mac_table_set(hw, uc, mc);
1090 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1092 struct virtio_hw *hw = dev->data->dev_private;
1093 struct ether_addr *addrs = dev->data->mac_addrs;
1094 struct virtio_net_ctrl_mac *uc, *mc;
1097 if (index >= VIRTIO_MAX_MAC_ADDRS) {
1098 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1102 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1104 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1107 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1108 struct virtio_net_ctrl_mac *tbl;
1110 if (i == index || is_zero_ether_addr(addrs + i))
1113 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1114 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1117 virtio_mac_table_set(hw, uc, mc);
1121 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1123 struct virtio_hw *hw = dev->data->dev_private;
1125 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1127 /* Use atomic update if available */
1128 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1129 struct virtio_pmd_ctrl ctrl;
1130 int len = ETHER_ADDR_LEN;
1132 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1133 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1135 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1136 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1137 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1138 virtio_set_hwaddr(hw);
1142 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1144 struct virtio_hw *hw = dev->data->dev_private;
1145 struct virtio_pmd_ctrl ctrl;
1148 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1151 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1152 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1153 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1154 len = sizeof(vlan_id);
1156 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1160 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1162 uint64_t host_features;
1164 /* Prepare guest_features: feature that driver wants to support */
1165 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1168 /* Read device(host) feature bits */
1169 host_features = VTPCI_OPS(hw)->get_features(hw);
1170 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1173 /* If supported, ensure MTU value is valid before acknowledging it. */
1174 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1175 struct virtio_net_config config;
1177 vtpci_read_dev_config(hw,
1178 offsetof(struct virtio_net_config, mtu),
1179 &config.mtu, sizeof(config.mtu));
1181 if (config.mtu < ETHER_MIN_MTU)
1182 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1186 * Negotiate features: Subset of device feature bits are written back
1187 * guest feature bits.
1189 hw->guest_features = req_features;
1190 hw->guest_features = vtpci_negotiate_features(hw, host_features);
1191 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1192 hw->guest_features);
1195 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1197 "VIRTIO_F_VERSION_1 features is not enabled.");
1200 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1201 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1203 "failed to set FEATURES_OK status!");
1208 hw->req_guest_features = req_features;
1214 * Process Virtio Config changed interrupt and call the callback
1215 * if link state changed.
1218 virtio_interrupt_handler(void *param)
1220 struct rte_eth_dev *dev = param;
1221 struct virtio_hw *hw = dev->data->dev_private;
1224 /* Read interrupt status which clears interrupt */
1225 isr = vtpci_isr(hw);
1226 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1228 if (rte_intr_enable(dev->intr_handle) < 0)
1229 PMD_DRV_LOG(ERR, "interrupt enable failed");
1231 if (isr & VIRTIO_PCI_ISR_CONFIG) {
1232 if (virtio_dev_link_update(dev, 0) == 0)
1233 _rte_eth_dev_callback_process(dev,
1234 RTE_ETH_EVENT_INTR_LSC,
1240 /* set rx and tx handlers according to what is supported */
1242 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1244 struct virtio_hw *hw = eth_dev->data->dev_private;
1246 if (hw->use_simple_rx) {
1247 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1248 eth_dev->data->port_id);
1249 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1250 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1252 "virtio: using mergeable buffer Rx path on port %u",
1253 eth_dev->data->port_id);
1254 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1256 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1257 eth_dev->data->port_id);
1258 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1261 if (hw->use_simple_tx) {
1262 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1263 eth_dev->data->port_id);
1264 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1266 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1267 eth_dev->data->port_id);
1268 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1272 /* Only support 1:1 queue/interrupt mapping so far.
1273 * TODO: support n:1 queue/interrupt mapping when there are limited number of
1274 * interrupt vectors (<N+1).
1277 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1280 struct virtio_hw *hw = dev->data->dev_private;
1282 PMD_INIT_LOG(INFO, "queue/interrupt binding");
1283 for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1284 dev->intr_handle->intr_vec[i] = i + 1;
1285 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1286 VIRTIO_MSI_NO_VECTOR) {
1287 PMD_DRV_LOG(ERR, "failed to set queue vector");
1296 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1299 struct virtio_hw *hw = dev->data->dev_private;
1301 PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1302 for (i = 0; i < dev->data->nb_rx_queues; ++i)
1303 VTPCI_OPS(hw)->set_queue_irq(hw,
1304 hw->vqs[i * VTNET_CQ],
1305 VIRTIO_MSI_NO_VECTOR);
1309 virtio_configure_intr(struct rte_eth_dev *dev)
1311 struct virtio_hw *hw = dev->data->dev_private;
1313 if (!rte_intr_cap_multiple(dev->intr_handle)) {
1314 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1318 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1319 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1323 if (!dev->intr_handle->intr_vec) {
1324 dev->intr_handle->intr_vec =
1325 rte_zmalloc("intr_vec",
1326 hw->max_queue_pairs * sizeof(int), 0);
1327 if (!dev->intr_handle->intr_vec) {
1328 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1329 hw->max_queue_pairs);
1334 /* Re-register callback to update max_intr */
1335 rte_intr_callback_unregister(dev->intr_handle,
1336 virtio_interrupt_handler,
1338 rte_intr_callback_register(dev->intr_handle,
1339 virtio_interrupt_handler,
1342 /* DO NOT try to remove this! This function will enable msix, or QEMU
1343 * will encounter SIGSEGV when DRIVER_OK is sent.
1344 * And for legacy devices, this should be done before queue/vec binding
1345 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1346 * (22) will be ignored.
1348 if (rte_intr_enable(dev->intr_handle) < 0) {
1349 PMD_DRV_LOG(ERR, "interrupt enable failed");
1353 if (virtio_queues_bind_intr(dev) < 0) {
1354 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1361 /* reset device and renegotiate features if needed */
1363 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1365 struct virtio_hw *hw = eth_dev->data->dev_private;
1366 struct virtio_net_config *config;
1367 struct virtio_net_config local_config;
1368 struct rte_pci_device *pci_dev = NULL;
1371 /* Reset the device although not necessary at startup */
1374 /* Tell the host we've noticed this device. */
1375 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1377 /* Tell the host we've known how to drive the device. */
1378 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1379 if (virtio_negotiate_features(hw, req_features) < 0)
1382 if (!hw->virtio_user_dev) {
1383 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1384 rte_eth_copy_pci_info(eth_dev, pci_dev);
1387 eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
1388 /* If host does not support both status and MSI-X then disable LSC */
1389 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1390 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1392 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1394 /* Setting up rx_header size for the device */
1395 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1396 vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1397 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1399 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1401 /* Copy the permanent MAC address to: virtio_hw */
1402 virtio_get_hwaddr(hw);
1403 ether_addr_copy((struct ether_addr *) hw->mac_addr,
1404 ð_dev->data->mac_addrs[0]);
1406 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1407 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1408 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1410 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1411 config = &local_config;
1413 vtpci_read_dev_config(hw,
1414 offsetof(struct virtio_net_config, mac),
1415 &config->mac, sizeof(config->mac));
1417 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1418 vtpci_read_dev_config(hw,
1419 offsetof(struct virtio_net_config, status),
1420 &config->status, sizeof(config->status));
1423 "VIRTIO_NET_F_STATUS is not supported");
1427 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1428 vtpci_read_dev_config(hw,
1429 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1430 &config->max_virtqueue_pairs,
1431 sizeof(config->max_virtqueue_pairs));
1434 "VIRTIO_NET_F_MQ is not supported");
1435 config->max_virtqueue_pairs = 1;
1438 hw->max_queue_pairs = config->max_virtqueue_pairs;
1440 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1441 vtpci_read_dev_config(hw,
1442 offsetof(struct virtio_net_config, mtu),
1444 sizeof(config->mtu));
1447 * MTU value has already been checked at negotiation
1448 * time, but check again in case it has changed since
1449 * then, which should not happen.
1451 if (config->mtu < ETHER_MIN_MTU) {
1452 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1457 hw->max_mtu = config->mtu;
1458 /* Set initial MTU to maximum one supported by vhost */
1459 eth_dev->data->mtu = config->mtu;
1462 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1463 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1466 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1467 config->max_virtqueue_pairs);
1468 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1470 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1471 config->mac[0], config->mac[1],
1472 config->mac[2], config->mac[3],
1473 config->mac[4], config->mac[5]);
1475 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1476 hw->max_queue_pairs = 1;
1479 ret = virtio_alloc_queues(eth_dev);
1483 if (eth_dev->data->dev_conf.intr_conf.rxq) {
1484 if (virtio_configure_intr(eth_dev) < 0) {
1485 PMD_INIT_LOG(ERR, "failed to configure interrupt");
1490 vtpci_reinit_complete(hw);
1493 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1494 eth_dev->data->port_id, pci_dev->id.vendor_id,
1495 pci_dev->id.device_id);
1501 * Remap the PCI device again (IO port map for legacy device and
1502 * memory map for modern device), so that the secondary process
1503 * could have the PCI initiated correctly.
1506 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1510 * We don't have to re-parse the PCI config space, since
1511 * rte_pci_map_device() makes sure the mapped address
1512 * in secondary process would equal to the one mapped in
1513 * the primary process: error will be returned if that
1514 * requirement is not met.
1516 * That said, we could simply reuse all cap pointers
1517 * (such as dev_cfg, common_cfg, etc.) parsed from the
1518 * primary process, which is stored in shared memory.
1520 if (rte_pci_map_device(pci_dev)) {
1521 PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1525 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1533 virtio_set_vtpci_ops(struct virtio_hw *hw)
1535 #ifdef RTE_VIRTIO_USER
1536 if (hw->virtio_user_dev)
1537 VTPCI_OPS(hw) = &virtio_user_ops;
1541 VTPCI_OPS(hw) = &modern_ops;
1543 VTPCI_OPS(hw) = &legacy_ops;
1547 * This function is based on probe() function in virtio_pci.c
1548 * It returns 0 on success.
1551 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1553 struct virtio_hw *hw = eth_dev->data->dev_private;
1556 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1558 eth_dev->dev_ops = &virtio_eth_dev_ops;
1560 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1561 if (!hw->virtio_user_dev) {
1562 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1567 virtio_set_vtpci_ops(hw);
1568 set_rxtx_funcs(eth_dev);
1573 /* Allocate memory for storing MAC addresses */
1574 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1575 if (eth_dev->data->mac_addrs == NULL) {
1577 "Failed to allocate %d bytes needed to store MAC addresses",
1578 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1582 hw->port_id = eth_dev->data->port_id;
1583 /* For virtio_user case the hw->virtio_user_dev is populated by
1584 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1586 if (!hw->virtio_user_dev) {
1587 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1592 /* reset device and negotiate default features */
1593 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1597 /* Setup interrupt callback */
1598 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1599 rte_intr_callback_register(eth_dev->intr_handle,
1600 virtio_interrupt_handler, eth_dev);
1606 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1608 PMD_INIT_FUNC_TRACE();
1610 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1613 virtio_dev_stop(eth_dev);
1614 virtio_dev_close(eth_dev);
1616 eth_dev->dev_ops = NULL;
1617 eth_dev->tx_pkt_burst = NULL;
1618 eth_dev->rx_pkt_burst = NULL;
1620 rte_free(eth_dev->data->mac_addrs);
1621 eth_dev->data->mac_addrs = NULL;
1623 /* reset interrupt callback */
1624 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1625 rte_intr_callback_unregister(eth_dev->intr_handle,
1626 virtio_interrupt_handler,
1628 if (eth_dev->device)
1629 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1631 PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1636 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1637 struct rte_pci_device *pci_dev)
1639 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1640 eth_virtio_dev_init);
1643 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1645 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1648 static struct rte_pci_driver rte_virtio_pmd = {
1650 .name = "net_virtio",
1652 .id_table = pci_id_virtio_map,
1654 .probe = eth_virtio_pci_probe,
1655 .remove = eth_virtio_pci_remove,
1658 RTE_INIT(rte_virtio_pmd_init);
1660 rte_virtio_pmd_init(void)
1662 if (rte_eal_iopl_init() != 0) {
1663 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1667 rte_pci_register(&rte_virtio_pmd);
1671 * Configure virtio device
1672 * It returns 0 on success.
1675 virtio_dev_configure(struct rte_eth_dev *dev)
1677 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1678 struct virtio_hw *hw = dev->data->dev_private;
1679 uint64_t req_features;
1682 PMD_INIT_LOG(DEBUG, "configure");
1683 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1685 if (dev->data->dev_conf.intr_conf.rxq) {
1686 ret = virtio_init_device(dev, hw->req_guest_features);
1691 /* The name hw_ip_checksum is a bit confusing since it can be
1692 * set by the application to request L3 and/or L4 checksums. In
1693 * case of virtio, only L4 checksum is supported.
1695 if (rxmode->hw_ip_checksum)
1696 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1698 if (rxmode->enable_lro)
1700 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1701 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1703 /* if request features changed, reinit the device */
1704 if (req_features != hw->req_guest_features) {
1705 ret = virtio_init_device(dev, req_features);
1710 if (rxmode->hw_ip_checksum &&
1711 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1713 "rx checksum not available on this host");
1717 if (rxmode->enable_lro &&
1718 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1719 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1721 "Large Receive Offload not available on this host");
1725 /* start control queue */
1726 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1727 virtio_dev_cq_start(dev);
1729 hw->vlan_strip = rxmode->hw_vlan_strip;
1731 if (rxmode->hw_vlan_filter
1732 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1734 "vlan filtering not available on this host");
1738 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1739 /* Enable vector (0) for Link State Intrerrupt */
1740 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1741 VIRTIO_MSI_NO_VECTOR) {
1742 PMD_DRV_LOG(ERR, "failed to set config vector");
1746 hw->use_simple_rx = 1;
1747 hw->use_simple_tx = 1;
1749 #if defined RTE_ARCH_ARM64 || defined CONFIG_RTE_ARCH_ARM
1750 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1751 hw->use_simple_rx = 0;
1752 hw->use_simple_tx = 0;
1755 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1756 hw->use_simple_rx = 0;
1757 hw->use_simple_tx = 0;
1760 if (rxmode->hw_ip_checksum)
1761 hw->use_simple_rx = 0;
1768 virtio_dev_start(struct rte_eth_dev *dev)
1770 uint16_t nb_queues, i;
1771 struct virtnet_rx *rxvq;
1772 struct virtnet_tx *txvq __rte_unused;
1773 struct virtio_hw *hw = dev->data->dev_private;
1776 /* Finish the initialization of the queues */
1777 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1778 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1782 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1783 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1788 /* check if lsc interrupt feature is enabled */
1789 if (dev->data->dev_conf.intr_conf.lsc) {
1790 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1791 PMD_DRV_LOG(ERR, "link status not supported by host");
1796 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1797 * in device configure, but it could be unmapped when device is
1800 if (dev->data->dev_conf.intr_conf.lsc ||
1801 dev->data->dev_conf.intr_conf.rxq) {
1802 rte_intr_disable(dev->intr_handle);
1804 if (rte_intr_enable(dev->intr_handle) < 0) {
1805 PMD_DRV_LOG(ERR, "interrupt enable failed");
1810 /*Notify the backend
1811 *Otherwise the tap backend might already stop its queue due to fullness.
1812 *vhost backend will have no chance to be waked up
1814 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1815 if (hw->max_queue_pairs > 1) {
1816 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1820 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1822 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1823 rxvq = dev->data->rx_queues[i];
1824 virtqueue_notify(rxvq->vq);
1827 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1828 txvq = dev->data->tx_queues[i];
1829 virtqueue_notify(txvq->vq);
1832 PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1834 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1835 rxvq = dev->data->rx_queues[i];
1836 VIRTQUEUE_DUMP(rxvq->vq);
1839 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1840 txvq = dev->data->tx_queues[i];
1841 VIRTQUEUE_DUMP(txvq->vq);
1844 set_rxtx_funcs(dev);
1847 /* Initialize Link state */
1848 virtio_dev_link_update(dev, 0);
1853 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1855 struct rte_mbuf *buf;
1856 int i, mbuf_num = 0;
1858 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1859 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1862 "Before freeing rxq[%d] used and unused buf", i);
1863 VIRTQUEUE_DUMP(rxvq->vq);
1865 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1866 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1867 rte_pktmbuf_free(buf);
1871 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1873 "After freeing rxq[%d] used and unused buf", i);
1874 VIRTQUEUE_DUMP(rxvq->vq);
1877 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1878 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1881 "Before freeing txq[%d] used and unused bufs",
1883 VIRTQUEUE_DUMP(txvq->vq);
1886 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1887 rte_pktmbuf_free(buf);
1891 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1893 "After freeing txq[%d] used and unused buf", i);
1894 VIRTQUEUE_DUMP(txvq->vq);
1899 * Stop device: disable interrupt and mark link down
1902 virtio_dev_stop(struct rte_eth_dev *dev)
1904 struct virtio_hw *hw = dev->data->dev_private;
1905 struct rte_eth_link link;
1906 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1908 PMD_INIT_LOG(DEBUG, "stop");
1910 if (intr_conf->lsc || intr_conf->rxq)
1911 rte_intr_disable(dev->intr_handle);
1914 memset(&link, 0, sizeof(link));
1915 virtio_dev_atomic_write_link_status(dev, &link);
1919 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1921 struct rte_eth_link link, old;
1923 struct virtio_hw *hw = dev->data->dev_private;
1924 memset(&link, 0, sizeof(link));
1925 virtio_dev_atomic_read_link_status(dev, &link);
1927 link.link_duplex = ETH_LINK_FULL_DUPLEX;
1928 link.link_speed = SPEED_10G;
1930 if (hw->started == 0) {
1931 link.link_status = ETH_LINK_DOWN;
1932 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1933 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1934 vtpci_read_dev_config(hw,
1935 offsetof(struct virtio_net_config, status),
1936 &status, sizeof(status));
1937 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1938 link.link_status = ETH_LINK_DOWN;
1939 PMD_INIT_LOG(DEBUG, "Port %d is down",
1940 dev->data->port_id);
1942 link.link_status = ETH_LINK_UP;
1943 PMD_INIT_LOG(DEBUG, "Port %d is up",
1944 dev->data->port_id);
1947 link.link_status = ETH_LINK_UP;
1949 virtio_dev_atomic_write_link_status(dev, &link);
1951 return (old.link_status == link.link_status) ? -1 : 0;
1955 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1957 uint64_t tso_mask, host_features;
1958 struct virtio_hw *hw = dev->data->dev_private;
1960 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1962 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
1963 dev_info->max_rx_queues =
1964 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1965 dev_info->max_tx_queues =
1966 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1967 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1968 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1969 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1970 dev_info->default_txconf = (struct rte_eth_txconf) {
1971 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1974 host_features = VTPCI_OPS(hw)->get_features(hw);
1975 dev_info->rx_offload_capa = 0;
1976 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1977 dev_info->rx_offload_capa |=
1978 DEV_RX_OFFLOAD_TCP_CKSUM |
1979 DEV_RX_OFFLOAD_UDP_CKSUM;
1981 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1982 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1983 if ((host_features & tso_mask) == tso_mask)
1984 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1986 dev_info->tx_offload_capa = 0;
1987 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1988 dev_info->tx_offload_capa |=
1989 DEV_TX_OFFLOAD_UDP_CKSUM |
1990 DEV_TX_OFFLOAD_TCP_CKSUM;
1992 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1993 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1994 if ((hw->guest_features & tso_mask) == tso_mask)
1995 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1999 * It enables testpmd to collect per queue stats.
2002 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2003 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2004 __rte_unused uint8_t is_rx)
2009 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2010 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2011 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");