4 * Copyright(c) 2010-2014 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.
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14 * notice, this list of conditions and the following disclaimer in
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #ifdef RTE_EXEC_ENV_LINUXAPP
43 #include <rte_ethdev.h>
44 #include <rte_memcpy.h>
45 #include <rte_string_fns.h>
46 #include <rte_memzone.h>
47 #include <rte_malloc.h>
48 #include <rte_atomic.h>
49 #include <rte_branch_prediction.h>
51 #include <rte_ether.h>
52 #include <rte_common.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"
64 static int eth_virtio_dev_init(struct eth_driver *eth_drv,
65 struct rte_eth_dev *eth_dev);
66 static int virtio_dev_configure(struct rte_eth_dev *dev);
67 static int virtio_dev_start(struct rte_eth_dev *dev);
68 static void virtio_dev_stop(struct rte_eth_dev *dev);
69 static void virtio_dev_info_get(struct rte_eth_dev *dev,
70 struct rte_eth_dev_info *dev_info);
71 static int virtio_dev_link_update(struct rte_eth_dev *dev,
72 __rte_unused int wait_to_complete);
74 static void virtio_set_hwaddr(struct virtio_hw *hw);
75 static void virtio_get_hwaddr(struct virtio_hw *hw);
77 static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
78 static void virtio_dev_tx_queue_release(__rte_unused void *txq);
80 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
81 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
82 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
84 static int virtio_dev_queue_stats_mapping_set(
85 __rte_unused struct rte_eth_dev *eth_dev,
86 __rte_unused uint16_t queue_id,
87 __rte_unused uint8_t stat_idx,
88 __rte_unused uint8_t is_rx);
91 * The set of PCI devices this driver supports
93 static struct rte_pci_id pci_id_virtio_map[] = {
95 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
96 #include "rte_pci_dev_ids.h"
98 { .vendor_id = 0, /* sentinel */ },
102 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
103 int *dlen, int pkt_num)
105 uint32_t head = vq->vq_desc_head_idx, i;
107 virtio_net_ctrl_ack status = ~0;
108 struct virtio_pmd_ctrl result;
110 ctrl->status = status;
114 "%s(): Control queue is not supported.\n",
119 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
120 "vq->hw->cvq = %p vq = %p\n",
121 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
123 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
126 memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
127 sizeof(struct virtio_pmd_ctrl));
130 * Format is enforced in qemu code:
131 * One TX packet for header;
132 * At least one TX packet per argument;
133 * One RX packet for ACK.
135 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
136 vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
137 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
139 i = vq->vq_ring.desc[head].next;
141 for (k = 0; k < pkt_num; k++) {
142 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
143 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
144 + sizeof(struct virtio_net_ctrl_hdr)
145 + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
146 vq->vq_ring.desc[i].len = dlen[k];
149 i = vq->vq_ring.desc[i].next;
152 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
153 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
154 + sizeof(struct virtio_net_ctrl_hdr);
155 vq->vq_ring.desc[i].len = sizeof(ctrl->status);
158 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
160 vq_update_avail_ring(vq, head);
161 vq_update_avail_idx(vq);
163 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d\n", vq->vq_queue_index);
165 virtqueue_notify(vq);
167 while (vq->vq_used_cons_idx == vq->vq_ring.used->idx)
170 while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
171 uint32_t idx, desc_idx, used_idx;
172 struct vring_used_elem *uep;
176 used_idx = (uint32_t)(vq->vq_used_cons_idx
177 & (vq->vq_nentries - 1));
178 uep = &vq->vq_ring.used->ring[used_idx];
179 idx = (uint32_t) uep->id;
182 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
183 desc_idx = vq->vq_ring.desc[desc_idx].next;
187 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
188 vq->vq_desc_head_idx = idx;
190 vq->vq_used_cons_idx++;
194 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d\n",
195 vq->vq_free_cnt, vq->vq_desc_head_idx);
197 memcpy(&result, vq->virtio_net_hdr_mz->addr,
198 sizeof(struct virtio_pmd_ctrl));
200 return result.status;
204 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
207 = VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
208 struct virtio_pmd_ctrl ctrl;
212 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
213 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
214 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
216 dlen[0] = sizeof(uint16_t);
218 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
221 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
222 "failed, this is too late now...\n");
229 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
232 uint8_t vtpci_queue_idx,
234 unsigned int socket_id,
235 struct virtqueue **pvq)
237 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
238 const struct rte_memzone *mz;
241 struct virtio_hw *hw =
242 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
243 struct virtqueue *vq = NULL;
245 /* Write the virtqueue index to the Queue Select Field */
246 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
247 PMD_INIT_LOG(DEBUG, "selecting queue: %d\n", vtpci_queue_idx);
250 * Read the virtqueue size from the Queue Size field
251 * Always power of 2 and if 0 virtqueue does not exist
253 vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
254 PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d\n", vq_size, nb_desc);
258 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist\n", __func__);
260 } else if (!rte_is_power_of_2(vq_size)) {
261 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2\n", __func__);
263 } else if (nb_desc != vq_size) {
264 PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size\n",
269 if (queue_type == VTNET_RQ) {
270 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
271 dev->data->port_id, queue_idx);
272 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
273 vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
274 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
275 } else if (queue_type == VTNET_TQ) {
276 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
277 dev->data->port_id, queue_idx);
278 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
279 vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
280 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
281 } else if (queue_type == VTNET_CQ) {
282 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
284 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
285 vq_size * sizeof(struct vq_desc_extra),
287 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
290 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue\n", __func__);
295 vq->port_id = dev->data->port_id;
296 vq->queue_id = queue_idx;
297 vq->vq_queue_index = vtpci_queue_idx;
298 vq->vq_alignment = VIRTIO_PCI_VRING_ALIGN;
299 vq->vq_nentries = vq_size;
300 vq->vq_free_cnt = vq_size;
303 * Reserve a memzone for vring elements
305 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
306 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
307 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d\n", size, vq->vq_ring_size);
309 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
310 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
317 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
318 * and only accepts 32 bit page frame number.
319 * Check if the allocated physical memory exceeds 16TB.
321 if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
322 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!\n");
327 memset(mz->addr, 0, sizeof(mz->len));
329 vq->vq_ring_mem = mz->phys_addr;
330 vq->vq_ring_virt_mem = mz->addr;
331 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64"\n", (uint64_t)mz->phys_addr);
332 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64"\n", (uint64_t)mz->addr);
333 vq->virtio_net_hdr_mz = NULL;
334 vq->virtio_net_hdr_mem = (void *)NULL;
336 if (queue_type == VTNET_TQ) {
338 * For each xmit packet, allocate a virtio_net_hdr
340 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
341 dev->data->port_id, queue_idx);
342 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
343 vq_size * sizeof(struct virtio_net_hdr),
344 socket_id, 0, CACHE_LINE_SIZE);
345 if (vq->virtio_net_hdr_mz == NULL) {
349 vq->virtio_net_hdr_mem =
350 (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
351 memset(vq->virtio_net_hdr_mz->addr, 0,
352 vq_size * sizeof(struct virtio_net_hdr));
353 } else if (queue_type == VTNET_CQ) {
354 /* Allocate a page for control vq command, data and status */
355 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
357 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
358 PAGE_SIZE, socket_id, 0, CACHE_LINE_SIZE);
359 if (vq->virtio_net_hdr_mz == NULL) {
363 vq->virtio_net_hdr_mem =
364 (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
365 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
369 * Set guest physical address of the virtqueue
370 * in VIRTIO_PCI_QUEUE_PFN config register of device
372 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
373 mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
379 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
382 struct virtqueue *vq;
383 uint16_t nb_desc = 0;
385 struct virtio_hw *hw =
386 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
388 PMD_INIT_FUNC_TRACE();
389 ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
390 vtpci_queue_idx, nb_desc, socket_id, &vq);
393 PMD_INIT_LOG(ERR, "control vq initialization failed\n");
402 virtio_dev_close(struct rte_eth_dev *dev)
404 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
406 virtio_dev_stop(dev);
410 * dev_ops for virtio, bare necessities for basic operation
412 static struct eth_dev_ops virtio_eth_dev_ops = {
413 .dev_configure = virtio_dev_configure,
414 .dev_start = virtio_dev_start,
415 .dev_stop = virtio_dev_stop,
416 .dev_close = virtio_dev_close,
418 .dev_infos_get = virtio_dev_info_get,
419 .stats_get = virtio_dev_stats_get,
420 .stats_reset = virtio_dev_stats_reset,
421 .link_update = virtio_dev_link_update,
422 .mac_addr_add = NULL,
423 .mac_addr_remove = NULL,
424 .rx_queue_setup = virtio_dev_rx_queue_setup,
425 /* meaningfull only to multiple queue */
426 .rx_queue_release = virtio_dev_rx_queue_release,
427 .tx_queue_setup = virtio_dev_tx_queue_setup,
428 /* meaningfull only to multiple queue */
429 .tx_queue_release = virtio_dev_tx_queue_release,
430 /* collect stats per queue */
431 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
435 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
436 struct rte_eth_link *link)
438 struct rte_eth_link *dst = link;
439 struct rte_eth_link *src = &(dev->data->dev_link);
441 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
442 *(uint64_t *)src) == 0)
449 * Atomically writes the link status information into global
450 * structure rte_eth_dev.
453 * - Pointer to the structure rte_eth_dev to read from.
454 * - Pointer to the buffer to be saved with the link status.
457 * - On success, zero.
458 * - On failure, negative value.
461 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
462 struct rte_eth_link *link)
464 struct rte_eth_link *dst = &(dev->data->dev_link);
465 struct rte_eth_link *src = link;
467 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
468 *(uint64_t *)src) == 0)
475 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
477 struct virtio_hw *hw =
478 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
480 memcpy(stats, &hw->eth_stats, sizeof(*stats));
484 virtio_dev_stats_reset(struct rte_eth_dev *dev)
486 struct virtio_hw *hw =
487 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
488 /* Reset software totals */
489 memset(&hw->eth_stats, 0, sizeof(hw->eth_stats));
493 virtio_set_hwaddr(struct virtio_hw *hw)
495 vtpci_write_dev_config(hw,
496 offsetof(struct virtio_net_config, mac),
497 &hw->mac_addr, ETHER_ADDR_LEN);
501 virtio_get_hwaddr(struct virtio_hw *hw)
503 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
504 vtpci_read_dev_config(hw,
505 offsetof(struct virtio_net_config, mac),
506 &hw->mac_addr, ETHER_ADDR_LEN);
508 eth_random_addr(&hw->mac_addr[0]);
509 virtio_set_hwaddr(hw);
515 virtio_negotiate_features(struct virtio_hw *hw)
517 uint32_t guest_features, mask;
519 mask = VIRTIO_NET_F_CTRL_RX | VIRTIO_NET_F_CTRL_VLAN;
520 mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
522 /* TSO and LRO are only available when their corresponding
523 * checksum offload feature is also negotiated.
525 mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
526 mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
527 mask |= VTNET_LRO_FEATURES;
529 /* rx_mbuf should not be in multiple merged segments */
530 mask |= VIRTIO_NET_F_MRG_RXBUF;
532 /* not negotiating INDIRECT descriptor table support */
533 mask |= VIRTIO_RING_F_INDIRECT_DESC;
535 /* Prepare guest_features: feature that driver wants to support */
536 guest_features = VTNET_FEATURES & ~mask;
537 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x\n",
540 /* Read device(host) feature bits */
541 hw->host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
542 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x\n",
546 * Negotiate features: Subset of device feature bits are written back
547 * guest feature bits.
549 hw->guest_features = vtpci_negotiate_features(hw, guest_features);
550 PMD_INIT_LOG(DEBUG, "features after negotiate = %x\n",
554 #ifdef RTE_EXEC_ENV_LINUXAPP
556 parse_sysfs_value(const char *filename, unsigned long *val)
562 f = fopen(filename, "r");
564 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s\n",
569 if (fgets(buf, sizeof(buf), f) == NULL) {
570 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s\n",
575 *val = strtoul(buf, &end, 0);
576 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
577 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s\n",
586 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
588 unsigned int uio_num;
591 char dirname[PATH_MAX];
593 /* depending on kernel version, uio can be located in uio/uioX
595 snprintf(dirname, sizeof(dirname),
596 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
597 loc->domain, loc->bus, loc->devid, loc->function);
598 dir = opendir(dirname);
600 /* retry with the parent directory */
601 snprintf(dirname, sizeof(dirname),
602 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
603 loc->domain, loc->bus, loc->devid, loc->function);
604 dir = opendir(dirname);
607 PMD_INIT_LOG(ERR, "Cannot opendir %s\n", dirname);
612 /* take the first file starting with "uio" */
613 while ((e = readdir(dir)) != NULL) {
614 /* format could be uio%d ...*/
615 int shortprefix_len = sizeof("uio") - 1;
616 /* ... or uio:uio%d */
617 int longprefix_len = sizeof("uio:uio") - 1;
620 if (strncmp(e->d_name, "uio", 3) != 0)
623 /* first try uio%d */
625 uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
626 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
627 snprintf(buf, buflen, "%s/uio%u", dirname, uio_num);
631 /* then try uio:uio%d */
633 uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
634 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
635 snprintf(buf, buflen, "%s/uio:uio%u", dirname,
642 /* No uio resource found */
644 PMD_INIT_LOG(ERR, "Could not find uio resource\n");
652 virtio_has_msix(const struct rte_pci_addr *loc)
655 char dirname[PATH_MAX];
657 snprintf(dirname, sizeof(dirname),
658 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
659 loc->domain, loc->bus, loc->devid, loc->function);
661 d = opendir(dirname);
669 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
671 /* nic_uio does not enable interrupts, return 0 (false). */
677 * This function is based on probe() function in virtio_pci.c
678 * It returns 0 on success.
681 eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
682 struct rte_eth_dev *eth_dev)
684 struct virtio_net_config *config;
685 struct virtio_net_config local_config;
686 uint32_t offset_conf = sizeof(config->mac);
687 struct rte_pci_device *pci_dev;
688 struct virtio_hw *hw =
689 VIRTIO_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
691 if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr)) {
693 "MBUF HEADROOM should be enough to hold virtio net hdr\n");
697 if (!(rte_eal_get_configuration()->flags & EAL_FLG_HIGH_IOPL)) {
699 "IOPL call failed in EAL init - cannot use virtio PMD driver\n");
703 eth_dev->dev_ops = &virtio_eth_dev_ops;
704 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
705 eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
707 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
710 pci_dev = eth_dev->pci_dev;
712 hw->device_id = pci_dev->id.device_id;
713 hw->vendor_id = pci_dev->id.vendor_id;
714 #ifdef RTE_EXEC_ENV_LINUXAPP
716 char dirname[PATH_MAX];
717 char filename[PATH_MAX];
718 unsigned long start, size;
720 if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname)) < 0)
723 /* get portio size */
724 snprintf(filename, sizeof(filename),
725 "%s/portio/port0/size", dirname);
726 if (parse_sysfs_value(filename, &size) < 0) {
727 PMD_INIT_LOG(ERR, "%s(): cannot parse size\n",
732 /* get portio start */
733 snprintf(filename, sizeof(filename),
734 "%s/portio/port0/start", dirname);
735 if (parse_sysfs_value(filename, &start) < 0) {
736 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start\n",
740 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
741 pci_dev->mem_resource[0].len = (uint64_t)size;
743 "PCI Port IO found start=0x%lx with size=0x%lx\n",
747 hw->use_msix = virtio_has_msix(&pci_dev->addr);
748 hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
750 /* Reset the device although not necessary at startup */
753 /* Tell the host we've noticed this device. */
754 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
756 /* Tell the host we've known how to drive the device. */
757 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
758 virtio_negotiate_features(hw);
760 /* Setting up rx_header size for the device */
761 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
762 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
764 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
766 /* Allocate memory for storing MAC addresses */
767 eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
768 if (eth_dev->data->mac_addrs == NULL) {
770 "Failed to allocate %d bytes needed to store MAC addresses",
775 /* Copy the permanent MAC address to: virtio_hw */
776 virtio_get_hwaddr(hw);
777 ether_addr_copy((struct ether_addr *) hw->mac_addr,
778 ð_dev->data->mac_addrs[0]);
780 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
781 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
782 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
784 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
785 config = &local_config;
787 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
788 offset_conf += sizeof(config->status);
791 "VIRTIO_NET_F_STATUS is not supported\n");
795 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
796 offset_conf += sizeof(config->max_virtqueue_pairs);
799 "VIRTIO_NET_F_MQ is not supported\n");
800 config->max_virtqueue_pairs = 1;
803 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
806 (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
807 VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
809 (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
810 VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
812 virtio_dev_cq_queue_setup(eth_dev,
813 config->max_virtqueue_pairs * 2,
816 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d\n",
817 config->max_virtqueue_pairs);
818 PMD_INIT_LOG(DEBUG, "config->status=%d\n", config->status);
820 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
821 config->mac[0], config->mac[1],
822 config->mac[2], config->mac[3],
823 config->mac[4], config->mac[5]);
825 hw->max_rx_queues = 1;
826 hw->max_tx_queues = 1;
829 eth_dev->data->nb_rx_queues = hw->max_rx_queues;
830 eth_dev->data->nb_tx_queues = hw->max_tx_queues;
832 PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d\n",
833 hw->max_rx_queues, hw->max_tx_queues);
834 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
835 eth_dev->data->port_id, pci_dev->id.vendor_id,
836 pci_dev->id.device_id);
840 static struct eth_driver rte_virtio_pmd = {
842 .name = "rte_virtio_pmd",
843 .id_table = pci_id_virtio_map,
844 .drv_flags = RTE_PCI_DRV_NEED_MAPPING,
846 .eth_dev_init = eth_virtio_dev_init,
847 .dev_private_size = sizeof(struct virtio_adapter),
851 * Driver initialization routine.
852 * Invoked once at EAL init time.
853 * Register itself as the [Poll Mode] Driver of PCI virtio devices.
854 * Returns 0 on success.
857 rte_virtio_pmd_init(const char *name __rte_unused, const char *param __rte_unused)
859 rte_eth_driver_register(&rte_virtio_pmd);
864 * Only 1 queue is supported, no queue release related operation
867 virtio_dev_rx_queue_release(__rte_unused void *rxq)
872 virtio_dev_tx_queue_release(__rte_unused void *txq)
877 * Configure virtio device
878 * It returns 0 on success.
881 virtio_dev_configure(__rte_unused struct rte_eth_dev *dev)
888 virtio_dev_start(struct rte_eth_dev *dev)
890 uint16_t nb_queues, i;
892 struct virtio_hw *hw =
893 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
895 /* Tell the host we've noticed this device. */
896 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
898 /* Tell the host we've known how to drive the device. */
899 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
901 hw->adapter_stopped = 0;
903 virtio_dev_cq_start(dev);
905 /* Do final configuration before rx/tx engine starts */
906 virtio_dev_rxtx_start(dev);
908 /* Check VIRTIO_NET_F_STATUS for link status*/
909 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
910 vtpci_read_dev_config(hw,
911 offsetof(struct virtio_net_config, status),
912 &status, sizeof(status));
913 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
914 PMD_INIT_LOG(ERR, "Port: %d Link is DOWN\n", dev->data->port_id);
917 PMD_INIT_LOG(DEBUG, "Port: %d Link is UP\n", dev->data->port_id);
920 vtpci_reinit_complete(hw);
923 *Otherwise the tap backend might already stop its queue due to fullness.
924 *vhost backend will have no chance to be waked up
926 nb_queues = dev->data->nb_rx_queues;
928 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
932 PMD_INIT_LOG(DEBUG, "nb_queues=%d\n", nb_queues);
934 for (i = 0; i < nb_queues; i++)
935 virtqueue_notify(dev->data->rx_queues[i]);
937 PMD_INIT_LOG(DEBUG, "Notified backend at initialization\n");
939 for (i = 0; i < dev->data->nb_rx_queues; i++)
940 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
942 for (i = 0; i < dev->data->nb_tx_queues; i++)
943 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
948 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
950 struct rte_mbuf *buf;
953 for (i = 0; i < dev->data->nb_rx_queues; i++) {
955 "Before freeing rxq[%d] used and unused buf\n", i);
956 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
958 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
959 dev->data->rx_queues[i])) != NULL) {
960 rte_pktmbuf_free_seg(buf);
964 PMD_INIT_LOG(DEBUG, "free %d mbufs\n", mbuf_num);
966 "After freeing rxq[%d] used and unused buf\n", i);
967 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
970 for (i = 0; i < dev->data->nb_tx_queues; i++) {
972 "Before freeing txq[%d] used and unused bufs\n",
974 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
977 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
978 dev->data->tx_queues[i])) != NULL) {
979 rte_pktmbuf_free_seg(buf);
983 PMD_INIT_LOG(DEBUG, "free %d mbufs\n", mbuf_num);
984 PMD_INIT_LOG(DEBUG, "After freeing txq[%d] used and "
986 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
991 * Stop device: disable rx and tx functions to allow for reconfiguring.
994 virtio_dev_stop(struct rte_eth_dev *dev)
996 struct virtio_hw *hw =
997 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1001 virtio_dev_free_mbufs(dev);
1005 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1007 struct rte_eth_link link, old;
1009 struct virtio_hw *hw =
1010 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1011 memset(&link, 0, sizeof(link));
1012 virtio_dev_atomic_read_link_status(dev, &link);
1014 link.link_duplex = FULL_DUPLEX;
1015 link.link_speed = SPEED_10G;
1016 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1017 PMD_INIT_LOG(DEBUG, "Get link status from hw\n");
1018 vtpci_read_dev_config(hw,
1019 offsetof(struct virtio_net_config, status),
1020 &status, sizeof(status));
1021 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1022 link.link_status = 0;
1023 PMD_INIT_LOG(DEBUG, "Port %d is down\n",
1024 dev->data->port_id);
1026 link.link_status = 1;
1027 PMD_INIT_LOG(DEBUG, "Port %d is up\n",
1028 dev->data->port_id);
1031 link.link_status = 1; /* Link up */
1033 virtio_dev_atomic_write_link_status(dev, &link);
1034 if (old.link_status == link.link_status)
1041 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1043 struct virtio_hw *hw = VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1045 dev_info->driver_name = dev->driver->pci_drv.name;
1046 dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1047 dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1048 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1049 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1050 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1054 * It enables testpmd to collect per queue stats.
1057 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1058 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1059 __rte_unused uint8_t is_rx)
1064 static struct rte_driver rte_virtio_driver = {
1066 .init = rte_virtio_pmd_init,
1069 PMD_REGISTER_DRIVER(rte_virtio_driver);