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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);
85 * The set of PCI devices this driver supports
87 static struct rte_pci_id pci_id_virtio_map[] = {
89 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
90 #include "rte_pci_dev_ids.h"
92 { .vendor_id = 0, /* sentinel */ },
95 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
98 uint8_t vtpci_queue_idx,
100 unsigned int socket_id,
101 struct virtqueue **pvq)
103 char vq_name[VIRTQUEUE_MAX_NAME_SZ];
104 const struct rte_memzone *mz;
107 struct virtio_hw *hw =
108 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
109 struct virtqueue *vq = NULL;
111 /* Write the virtqueue index to the Queue Select Field */
112 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
113 PMD_INIT_LOG(DEBUG, "selecting queue: %d\n", vtpci_queue_idx);
116 * Read the virtqueue size from the Queue Size field
117 * Always power of 2 and if 0 virtqueue does not exist
119 vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
120 PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d\n", vq_size, nb_desc);
124 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist\n", __func__);
126 } else if (!rte_is_power_of_2(vq_size)) {
127 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2\n", __func__);
129 } else if (nb_desc != vq_size) {
130 PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size\n",
135 if (queue_type == VTNET_RQ) {
136 rte_snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
137 dev->data->port_id, queue_idx);
138 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
139 vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
140 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
141 } else if(queue_type == VTNET_TQ) {
142 rte_snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
143 dev->data->port_id, queue_idx);
144 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
145 vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
146 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
147 } else if(queue_type == VTNET_CQ) {
148 rte_snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
149 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue),
152 memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
155 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue\n", __func__);
160 vq->port_id = dev->data->port_id;
161 vq->queue_id = queue_idx;
162 vq->vq_queue_index = vtpci_queue_idx;
163 vq->vq_alignment = VIRTIO_PCI_VRING_ALIGN;
164 vq->vq_nentries = vq_size;
165 vq->vq_free_cnt = vq_size;
168 * Reserve a memzone for vring elements
170 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
171 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
172 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d\n", size, vq->vq_ring_size);
174 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
175 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
182 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
183 * and only accepts 32 bit page frame number.
184 * Check if the allocated physical memory exceeds 16TB.
186 if ( (mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32) ) {
187 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!\n");
192 memset(mz->addr, 0, sizeof(mz->len));
194 vq->vq_ring_mem = mz->phys_addr;
195 vq->vq_ring_virt_mem = mz->addr;
196 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64"\n", (uint64_t)mz->phys_addr);
197 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64"\n", (uint64_t)mz->addr);
198 vq->virtio_net_hdr_mz = NULL;
199 vq->virtio_net_hdr_mem = (void *)NULL;
201 if (queue_type == VTNET_TQ) {
203 * For each xmit packet, allocate a virtio_net_hdr
205 rte_snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
206 dev->data->port_id, queue_idx);
207 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
208 vq_size * sizeof(struct virtio_net_hdr),
209 socket_id, 0, CACHE_LINE_SIZE);
210 if (vq->virtio_net_hdr_mz == NULL) {
214 vq->virtio_net_hdr_mem =
215 (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
216 memset(vq->virtio_net_hdr_mz->addr, 0,
217 vq_size * sizeof(struct virtio_net_hdr));
218 } else if (queue_type == VTNET_CQ) {
219 /* Allocate a page for control vq command, data and status */
220 rte_snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
222 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
223 PAGE_SIZE, socket_id, 0, CACHE_LINE_SIZE);
224 if (vq->virtio_net_hdr_mz == NULL) {
228 vq->virtio_net_hdr_mem =
229 (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
230 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
234 * Set guest physical address of the virtqueue
235 * in VIRTIO_PCI_QUEUE_PFN config register of device
237 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
238 mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
244 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev,
245 unsigned int socket_id)
247 struct virtqueue *vq;
248 uint16_t nb_desc = 0;
250 struct virtio_hw *hw =
251 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
253 PMD_INIT_FUNC_TRACE();
254 ret = virtio_dev_queue_setup(dev, VTNET_CQ, 0, VTNET_SQ_CQ_QUEUE_IDX,
255 nb_desc, socket_id, &vq);
257 PMD_INIT_LOG(ERR, "control vq initialization failed\n");
266 virtio_dev_close(struct rte_eth_dev *dev)
268 PMD_INIT_LOG(DEBUG, "virtio_dev_close");
270 virtio_dev_stop(dev);
274 * dev_ops for virtio, bare necessities for basic operation
276 static struct eth_dev_ops virtio_eth_dev_ops = {
277 .dev_configure = virtio_dev_configure,
278 .dev_start = virtio_dev_start,
279 .dev_stop = virtio_dev_stop,
280 .dev_close = virtio_dev_close,
282 .dev_infos_get = virtio_dev_info_get,
283 .stats_get = virtio_dev_stats_get,
284 .stats_reset = virtio_dev_stats_reset,
285 .link_update = virtio_dev_link_update,
286 .mac_addr_add = NULL,
287 .mac_addr_remove = NULL,
288 .rx_queue_setup = virtio_dev_rx_queue_setup,
289 /* meaningfull only to multiple queue */
290 .rx_queue_release = virtio_dev_rx_queue_release,
291 .tx_queue_setup = virtio_dev_tx_queue_setup,
292 /* meaningfull only to multiple queue */
293 .tx_queue_release = virtio_dev_tx_queue_release,
297 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
298 struct rte_eth_link *link)
300 struct rte_eth_link *dst = link;
301 struct rte_eth_link *src = &(dev->data->dev_link);
303 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
304 *(uint64_t *)src) == 0)
311 * Atomically writes the link status information into global
312 * structure rte_eth_dev.
315 * - Pointer to the structure rte_eth_dev to read from.
316 * - Pointer to the buffer to be saved with the link status.
319 * - On success, zero.
320 * - On failure, negative value.
323 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
324 struct rte_eth_link *link)
326 struct rte_eth_link *dst = &(dev->data->dev_link);
327 struct rte_eth_link *src = link;
329 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
330 *(uint64_t *)src) == 0)
337 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
339 struct virtio_hw *hw =
340 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
342 memcpy(stats, &hw->eth_stats, sizeof(*stats));
346 virtio_dev_stats_reset(struct rte_eth_dev *dev)
348 struct virtio_hw *hw =
349 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
350 /* Reset software totals */
351 memset(&hw->eth_stats, 0, sizeof(hw->eth_stats));
355 virtio_set_hwaddr(struct virtio_hw *hw)
357 vtpci_write_dev_config(hw,
358 offsetof(struct virtio_net_config, mac),
359 &hw->mac_addr, ETHER_ADDR_LEN);
363 virtio_get_hwaddr(struct virtio_hw *hw)
365 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
366 vtpci_read_dev_config(hw,
367 offsetof(struct virtio_net_config, mac),
368 &hw->mac_addr, ETHER_ADDR_LEN);
370 eth_random_addr(&hw->mac_addr[0]);
371 virtio_set_hwaddr(hw);
377 virtio_negotiate_features(struct virtio_hw *hw)
379 uint32_t guest_features, mask;
380 mask = VIRTIO_NET_F_CTRL_VQ | VIRTIO_NET_F_CTRL_RX | VIRTIO_NET_F_CTRL_VLAN;
381 mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM ;
383 /* TSO and LRO are only available when their corresponding
384 * checksum offload feature is also negotiated.
386 mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
387 mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
388 mask |= VTNET_LRO_FEATURES;
390 /* rx_mbuf should not be in multiple merged segments */
391 mask |= VIRTIO_NET_F_MRG_RXBUF;
393 /* not negotiating INDIRECT descriptor table support */
394 mask |= VIRTIO_RING_F_INDIRECT_DESC;
396 /* Prepare guest_features: feature that driver wants to support */
397 guest_features = VTNET_FEATURES & ~mask;
399 /* Read device(host) feature bits */
400 hw->host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
402 /* Negotiate features: Subset of device feature bits are written back (guest feature bits) */
403 hw->guest_features = vtpci_negotiate_features(hw, guest_features);
406 #ifdef RTE_EXEC_ENV_LINUXAPP
408 parse_sysfs_value(const char *filename, unsigned long *val)
414 if ((f = fopen(filename, "r")) == NULL) {
415 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s\n",
420 if (fgets(buf, sizeof(buf), f) == NULL) {
421 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s\n",
426 *val = strtoul(buf, &end, 0);
427 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
428 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s\n",
437 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
439 unsigned int uio_num;
442 char dirname[PATH_MAX];
444 /* depending on kernel version, uio can be located in uio/uioX
446 rte_snprintf(dirname, sizeof(dirname),
447 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
448 loc->domain, loc->bus, loc->devid, loc->function);
449 dir = opendir(dirname);
451 /* retry with the parent directory */
452 rte_snprintf(dirname, sizeof(dirname),
453 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
454 loc->domain, loc->bus, loc->devid, loc->function);
455 dir = opendir(dirname);
458 PMD_INIT_LOG(ERR, "Cannot opendir %s\n", dirname);
463 /* take the first file starting with "uio" */
464 while ((e = readdir(dir)) != NULL) {
465 /* format could be uio%d ...*/
466 int shortprefix_len = sizeof("uio") - 1;
467 /* ... or uio:uio%d */
468 int longprefix_len = sizeof("uio:uio") - 1;
471 if (strncmp(e->d_name, "uio", 3) != 0)
474 /* first try uio%d */
476 uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
477 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
478 rte_snprintf(buf, buflen, "%s/uio%u", dirname, uio_num);
482 /* then try uio:uio%d */
484 uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
485 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
486 rte_snprintf(buf, buflen, "%s/uio:uio%u", dirname,
493 /* No uio resource found */
495 PMD_INIT_LOG(ERR, "Could not find uio resource\n");
504 * This function is based on probe() function in virtio_pci.c
505 * It returns 0 on success.
508 eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
509 struct rte_eth_dev *eth_dev)
511 struct rte_pci_device *pci_dev;
512 struct virtio_hw *hw =
513 VIRTIO_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
514 if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr) ) {
516 "MBUF HEADROOM should be enough to hold virtio net hdr\n");
520 if (! (rte_eal_get_configuration()->flags & EAL_FLG_HIGH_IOPL)) {
522 "IOPL call failed in EAL init - cannot use virtio PMD driver\n");
526 eth_dev->dev_ops = &virtio_eth_dev_ops;
527 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
528 eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
530 if(rte_eal_process_type() == RTE_PROC_SECONDARY)
533 pci_dev = eth_dev->pci_dev;
535 hw->device_id = pci_dev->id.device_id;
536 hw->vendor_id = pci_dev->id.vendor_id;
537 #ifdef RTE_EXEC_ENV_LINUXAPP
539 char dirname[PATH_MAX];
540 char filename[PATH_MAX];
541 unsigned long start,size;
543 if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname)) < 0)
546 /* get portio size */
547 rte_snprintf(filename, sizeof(filename),
548 "%s/portio/port0/size", dirname);
549 if (parse_sysfs_value(filename, &size) < 0) {
550 PMD_INIT_LOG(ERR, "%s(): cannot parse size\n",
555 /* get portio start */
556 rte_snprintf(filename, sizeof(filename),
557 "%s/portio/port0/start", dirname);
558 if (parse_sysfs_value(filename, &start) < 0) {
559 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start\n",
563 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
564 pci_dev->mem_resource[0].len = (uint64_t)size;
565 PMD_INIT_LOG(DEBUG, "PCI Port IO found start=0x%lx with "
566 "size=0x%lx\n", start, size);
569 hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
571 hw->max_rx_queues = VIRTIO_MAX_RX_QUEUES;
572 hw->max_tx_queues = VIRTIO_MAX_TX_QUEUES;
574 /* Reset the device although not necessary at startup */
577 /* Tell the host we've noticed this device. */
578 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
580 /* Tell the host we've known how to drive the device. */
581 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
582 virtio_negotiate_features(hw);
584 /* Setting up rx_header size for the device */
585 if(vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
586 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
588 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
590 /* Allocate memory for storing MAC addresses */
591 eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
592 if (eth_dev->data->mac_addrs == NULL) {
594 "Failed to allocate %d bytes needed to store MAC addresses",
599 /* Copy the permanent MAC address to: virtio_hw */
600 virtio_get_hwaddr(hw);
601 ether_addr_copy((struct ether_addr *) hw->mac_addr,
602 ð_dev->data->mac_addrs[0]);
603 PMD_INIT_LOG(DEBUG, "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", hw->mac_addr[0],
604 hw->mac_addr[1],hw->mac_addr[2], hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
606 if(vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
607 virtio_dev_cq_queue_setup(eth_dev, SOCKET_ID_ANY);
609 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
610 eth_dev->data->port_id, pci_dev->id.vendor_id,
611 pci_dev->id.device_id);
615 static struct eth_driver rte_virtio_pmd = {
617 .name = "rte_virtio_pmd",
618 .id_table = pci_id_virtio_map,
620 .eth_dev_init = eth_virtio_dev_init,
621 .dev_private_size = sizeof(struct virtio_adapter),
625 * Driver initialization routine.
626 * Invoked once at EAL init time.
627 * Register itself as the [Poll Mode] Driver of PCI virtio devices.
628 * Returns 0 on success.
631 rte_virtio_pmd_init(const char *name __rte_unused, const char *param __rte_unused)
633 rte_eth_driver_register(&rte_virtio_pmd);
638 * Only 1 queue is supported, no queue release related operation
641 virtio_dev_rx_queue_release(__rte_unused void *rxq)
646 virtio_dev_tx_queue_release(__rte_unused void *txq)
651 * Configure virtio device
652 * It returns 0 on success.
655 virtio_dev_configure(__rte_unused struct rte_eth_dev *dev)
662 virtio_dev_start(struct rte_eth_dev *dev)
665 struct virtio_hw *hw =
666 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
668 /* Tell the host we've noticed this device. */
669 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
671 /* Tell the host we've known how to drive the device. */
672 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
674 hw->adapter_stopped = 0;
676 /* Do final configuration before rx/tx engine starts */
677 virtio_dev_rxtx_start(dev);
679 /* Check VIRTIO_NET_F_STATUS for link status*/
680 if(vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
681 vtpci_read_dev_config(hw,
682 offsetof(struct virtio_net_config, status),
683 &status, sizeof(status));
684 if((status & VIRTIO_NET_S_LINK_UP) == 0) {
685 PMD_INIT_LOG(ERR, "Port: %d Link is DOWN\n", dev->data->port_id);
688 PMD_INIT_LOG(DEBUG, "Port: %d Link is UP\n", dev->data->port_id);
691 vtpci_reinit_complete(hw);
694 *Otherwise the tap backend might already stop its queue due to fullness.
695 *vhost backend will have no chance to be waked up
697 virtqueue_notify(dev->data->rx_queues[0]);
698 PMD_INIT_LOG(DEBUG, "Notified backend at initialization\n");
702 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
704 struct rte_mbuf * buf;
706 PMD_INIT_LOG(DEBUG, "Before freeing rxq used and unused buf \n");
707 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[0]);
708 while( (buf =(struct rte_mbuf *)virtqueue_detatch_unused(dev->data->rx_queues[0])) != NULL) {
709 rte_pktmbuf_free_seg(buf);
712 PMD_INIT_LOG(DEBUG, "free %d mbufs\n", i);
713 PMD_INIT_LOG(DEBUG, "After freeing rxq used and unused buf\n");
714 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[0]);
715 PMD_INIT_LOG(DEBUG, "Before freeing txq used and unused bufs\n");
716 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[0]);
718 while( (buf = (struct rte_mbuf *)virtqueue_detatch_unused(dev->data->tx_queues[0])) != NULL) {
719 rte_pktmbuf_free_seg(buf);
722 PMD_INIT_LOG(DEBUG, "free %d mbufs\n", i);
723 PMD_INIT_LOG(DEBUG, "After freeing txq used and unused buf\n");
724 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[0]);
728 * Stop device: disable rx and tx functions to allow for reconfiguring.
731 virtio_dev_stop(struct rte_eth_dev *dev)
733 struct virtio_hw *hw =
734 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
738 virtio_dev_free_mbufs(dev);
742 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
744 struct rte_eth_link link, old;
746 struct virtio_hw *hw =
747 VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
748 memset(&link, 0, sizeof(link));
749 virtio_dev_atomic_read_link_status(dev, &link);
751 link.link_duplex = FULL_DUPLEX ;
752 link.link_speed = SPEED_10G ;
753 if(vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
754 PMD_INIT_LOG(DEBUG, "Get link status from hw\n");
755 vtpci_read_dev_config(hw,
756 offsetof(struct virtio_net_config, status),
757 &status, sizeof(status));
758 if((status & VIRTIO_NET_S_LINK_UP) == 0) {
759 link.link_status = 0;
760 PMD_INIT_LOG(DEBUG, "Port %d is down\n",dev->data->port_id);
762 link.link_status = 1;
763 PMD_INIT_LOG(DEBUG, "Port %d is up\n",dev->data->port_id);
766 link.link_status = 1; //Link up
768 virtio_dev_atomic_write_link_status(dev, &link);
769 if(old.link_status == link.link_status)
776 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
778 struct virtio_hw *hw = VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
779 dev_info->driver_name = dev->driver->pci_drv.name;
780 dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
781 dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
782 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
783 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
784 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
787 static struct rte_driver rte_virtio_driver = {
789 .init = rte_virtio_pmd_init,
792 PMD_REGISTER_DRIVER(rte_virtio_driver);