1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Intel Corporation
10 #include <linux/virtio_net.h>
13 #include <rte_malloc.h>
14 #include <rte_memory.h>
15 #include <rte_bus_pci.h>
16 #include <rte_vhost.h>
19 #include <rte_spinlock.h>
21 #include <rte_kvargs.h>
22 #include <rte_devargs.h>
24 #include "base/ifcvf.h"
26 #define DRV_LOG(level, fmt, args...) \
27 rte_log(RTE_LOG_ ## level, ifcvf_vdpa_logtype, \
28 "IFCVF %s(): " fmt "\n", __func__, ##args)
31 #define PAGE_SIZE 4096
34 #define IFCVF_USED_RING_LEN(size) \
35 ((size) * sizeof(struct vring_used_elem) + sizeof(uint16_t) * 3)
37 #define IFCVF_VDPA_MODE "vdpa"
38 #define IFCVF_SW_FALLBACK_LM "sw-live-migration"
40 static const char * const ifcvf_valid_arguments[] = {
46 static int ifcvf_vdpa_logtype;
48 struct ifcvf_internal {
49 struct rte_vdpa_dev_addr dev_addr;
50 struct rte_pci_device *pdev;
52 int vfio_container_fd;
55 pthread_t tid; /* thread for notify relay */
61 rte_atomic32_t started;
62 rte_atomic32_t dev_attached;
63 rte_atomic32_t running;
66 bool sw_fallback_running;
67 /* mediated vring for sw fallback */
68 struct vring m_vring[IFCVF_MAX_QUEUES * 2];
69 /* eventfd for used ring interrupt */
70 int intr_fd[IFCVF_MAX_QUEUES * 2];
73 struct internal_list {
74 TAILQ_ENTRY(internal_list) next;
75 struct ifcvf_internal *internal;
78 TAILQ_HEAD(internal_list_head, internal_list);
79 static struct internal_list_head internal_list =
80 TAILQ_HEAD_INITIALIZER(internal_list);
82 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
84 static struct internal_list *
85 find_internal_resource_by_did(int did)
88 struct internal_list *list;
90 pthread_mutex_lock(&internal_list_lock);
92 TAILQ_FOREACH(list, &internal_list, next) {
93 if (did == list->internal->did) {
99 pthread_mutex_unlock(&internal_list_lock);
107 static struct internal_list *
108 find_internal_resource_by_dev(struct rte_pci_device *pdev)
111 struct internal_list *list;
113 pthread_mutex_lock(&internal_list_lock);
115 TAILQ_FOREACH(list, &internal_list, next) {
116 if (pdev == list->internal->pdev) {
122 pthread_mutex_unlock(&internal_list_lock);
131 ifcvf_vfio_setup(struct ifcvf_internal *internal)
133 struct rte_pci_device *dev = internal->pdev;
134 char devname[RTE_DEV_NAME_MAX_LEN] = {0};
138 internal->vfio_dev_fd = -1;
139 internal->vfio_group_fd = -1;
140 internal->vfio_container_fd = -1;
142 rte_pci_device_name(&dev->addr, devname, RTE_DEV_NAME_MAX_LEN);
143 rte_vfio_get_group_num(rte_pci_get_sysfs_path(), devname,
146 internal->vfio_container_fd = rte_vfio_container_create();
147 if (internal->vfio_container_fd < 0)
150 internal->vfio_group_fd = rte_vfio_container_group_bind(
151 internal->vfio_container_fd, iommu_group_num);
152 if (internal->vfio_group_fd < 0)
155 if (rte_pci_map_device(dev))
158 internal->vfio_dev_fd = dev->intr_handle.vfio_dev_fd;
160 for (i = 0; i < RTE_MIN(PCI_MAX_RESOURCE, IFCVF_PCI_MAX_RESOURCE);
162 internal->hw.mem_resource[i].addr =
163 internal->pdev->mem_resource[i].addr;
164 internal->hw.mem_resource[i].phys_addr =
165 internal->pdev->mem_resource[i].phys_addr;
166 internal->hw.mem_resource[i].len =
167 internal->pdev->mem_resource[i].len;
173 rte_vfio_container_destroy(internal->vfio_container_fd);
178 ifcvf_dma_map(struct ifcvf_internal *internal, int do_map)
182 struct rte_vhost_memory *mem = NULL;
183 int vfio_container_fd;
185 ret = rte_vhost_get_mem_table(internal->vid, &mem);
187 DRV_LOG(ERR, "failed to get VM memory layout.");
191 vfio_container_fd = internal->vfio_container_fd;
193 for (i = 0; i < mem->nregions; i++) {
194 struct rte_vhost_mem_region *reg;
196 reg = &mem->regions[i];
197 DRV_LOG(INFO, "%s, region %u: HVA 0x%" PRIx64 ", "
198 "GPA 0x%" PRIx64 ", size 0x%" PRIx64 ".",
199 do_map ? "DMA map" : "DMA unmap", i,
200 reg->host_user_addr, reg->guest_phys_addr, reg->size);
203 ret = rte_vfio_container_dma_map(vfio_container_fd,
204 reg->host_user_addr, reg->guest_phys_addr,
207 DRV_LOG(ERR, "DMA map failed.");
211 ret = rte_vfio_container_dma_unmap(vfio_container_fd,
212 reg->host_user_addr, reg->guest_phys_addr,
215 DRV_LOG(ERR, "DMA unmap failed.");
228 hva_to_gpa(int vid, uint64_t hva)
230 struct rte_vhost_memory *mem = NULL;
231 struct rte_vhost_mem_region *reg;
235 if (rte_vhost_get_mem_table(vid, &mem) < 0)
238 for (i = 0; i < mem->nregions; i++) {
239 reg = &mem->regions[i];
241 if (hva >= reg->host_user_addr &&
242 hva < reg->host_user_addr + reg->size) {
243 gpa = hva - reg->host_user_addr + reg->guest_phys_addr;
255 vdpa_ifcvf_start(struct ifcvf_internal *internal)
257 struct ifcvf_hw *hw = &internal->hw;
260 struct rte_vhost_vring vq;
264 nr_vring = rte_vhost_get_vring_num(vid);
265 rte_vhost_get_negotiated_features(vid, &hw->req_features);
267 for (i = 0; i < nr_vring; i++) {
268 rte_vhost_get_vhost_vring(vid, i, &vq);
269 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
271 DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
274 hw->vring[i].desc = gpa;
276 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
278 DRV_LOG(ERR, "Fail to get GPA for available ring.");
281 hw->vring[i].avail = gpa;
283 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
285 DRV_LOG(ERR, "Fail to get GPA for used ring.");
288 hw->vring[i].used = gpa;
290 hw->vring[i].size = vq.size;
291 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
292 &hw->vring[i].last_used_idx);
296 return ifcvf_start_hw(&internal->hw);
300 vdpa_ifcvf_stop(struct ifcvf_internal *internal)
302 struct ifcvf_hw *hw = &internal->hw;
306 uint64_t log_base, log_size;
312 for (i = 0; i < hw->nr_vring; i++)
313 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
314 hw->vring[i].last_used_idx);
319 rte_vhost_get_negotiated_features(vid, &features);
320 if (RTE_VHOST_NEED_LOG(features)) {
321 ifcvf_disable_logging(hw);
322 rte_vhost_get_log_base(internal->vid, &log_base, &log_size);
323 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
324 log_base, IFCVF_LOG_BASE, log_size);
326 * IFCVF marks dirty memory pages for only packet buffer,
327 * SW helps to mark the used ring as dirty after device stops.
329 for (i = 0; i < hw->nr_vring; i++) {
330 len = IFCVF_USED_RING_LEN(hw->vring[i].size);
331 rte_vhost_log_used_vring(vid, i, 0, len);
336 #define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
337 sizeof(int) * (IFCVF_MAX_QUEUES * 2 + 1))
339 vdpa_enable_vfio_intr(struct ifcvf_internal *internal, bool m_rx)
342 uint32_t i, nr_vring;
343 char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
344 struct vfio_irq_set *irq_set;
346 struct rte_vhost_vring vring;
349 nr_vring = rte_vhost_get_vring_num(internal->vid);
351 irq_set = (struct vfio_irq_set *)irq_set_buf;
352 irq_set->argsz = sizeof(irq_set_buf);
353 irq_set->count = nr_vring + 1;
354 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
355 VFIO_IRQ_SET_ACTION_TRIGGER;
356 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
358 fd_ptr = (int *)&irq_set->data;
359 fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] = internal->pdev->intr_handle.fd;
361 for (i = 0; i < nr_vring; i++)
362 internal->intr_fd[i] = -1;
364 for (i = 0; i < nr_vring; i++) {
365 rte_vhost_get_vhost_vring(internal->vid, i, &vring);
366 fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
367 if ((i & 1) == 0 && m_rx == true) {
368 fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
370 DRV_LOG(ERR, "can't setup eventfd: %s",
374 internal->intr_fd[i] = fd;
375 fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = fd;
379 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
381 DRV_LOG(ERR, "Error enabling MSI-X interrupts: %s",
390 vdpa_disable_vfio_intr(struct ifcvf_internal *internal)
393 uint32_t i, nr_vring;
394 char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
395 struct vfio_irq_set *irq_set;
397 irq_set = (struct vfio_irq_set *)irq_set_buf;
398 irq_set->argsz = sizeof(irq_set_buf);
400 irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
401 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
404 nr_vring = rte_vhost_get_vring_num(internal->vid);
405 for (i = 0; i < nr_vring; i++) {
406 if (internal->intr_fd[i] >= 0)
407 close(internal->intr_fd[i]);
408 internal->intr_fd[i] = -1;
411 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
413 DRV_LOG(ERR, "Error disabling MSI-X interrupts: %s",
422 notify_relay(void *arg)
424 int i, kickfd, epfd, nfds = 0;
426 struct epoll_event events[IFCVF_MAX_QUEUES * 2];
427 struct epoll_event ev;
430 struct rte_vhost_vring vring;
431 struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
432 struct ifcvf_hw *hw = &internal->hw;
434 q_num = rte_vhost_get_vring_num(internal->vid);
436 epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
438 DRV_LOG(ERR, "failed to create epoll instance.");
441 internal->epfd = epfd;
443 for (qid = 0; qid < q_num; qid++) {
444 ev.events = EPOLLIN | EPOLLPRI;
445 rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
446 ev.data.u64 = qid | (uint64_t)vring.kickfd << 32;
447 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
448 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
454 nfds = epoll_wait(epfd, events, q_num, -1);
458 DRV_LOG(ERR, "epoll_wait return fail\n");
462 for (i = 0; i < nfds; i++) {
463 qid = events[i].data.u32;
464 kickfd = (uint32_t)(events[i].data.u64 >> 32);
466 nbytes = read(kickfd, &buf, 8);
468 if (errno == EINTR ||
469 errno == EWOULDBLOCK ||
472 DRV_LOG(INFO, "Error reading "
479 ifcvf_notify_queue(hw, qid);
487 setup_notify_relay(struct ifcvf_internal *internal)
491 ret = pthread_create(&internal->tid, NULL, notify_relay,
494 DRV_LOG(ERR, "failed to create notify relay pthread.");
501 unset_notify_relay(struct ifcvf_internal *internal)
506 pthread_cancel(internal->tid);
507 pthread_join(internal->tid, &status);
511 if (internal->epfd >= 0)
512 close(internal->epfd);
519 update_datapath(struct ifcvf_internal *internal)
523 rte_spinlock_lock(&internal->lock);
525 if (!rte_atomic32_read(&internal->running) &&
526 (rte_atomic32_read(&internal->started) &&
527 rte_atomic32_read(&internal->dev_attached))) {
528 ret = ifcvf_dma_map(internal, 1);
532 ret = vdpa_enable_vfio_intr(internal, 0);
536 ret = vdpa_ifcvf_start(internal);
540 ret = setup_notify_relay(internal);
544 rte_atomic32_set(&internal->running, 1);
545 } else if (rte_atomic32_read(&internal->running) &&
546 (!rte_atomic32_read(&internal->started) ||
547 !rte_atomic32_read(&internal->dev_attached))) {
548 ret = unset_notify_relay(internal);
552 vdpa_ifcvf_stop(internal);
554 ret = vdpa_disable_vfio_intr(internal);
558 ret = ifcvf_dma_map(internal, 0);
562 rte_atomic32_set(&internal->running, 0);
565 rte_spinlock_unlock(&internal->lock);
568 rte_spinlock_unlock(&internal->lock);
573 m_ifcvf_start(struct ifcvf_internal *internal)
575 struct ifcvf_hw *hw = &internal->hw;
576 uint32_t i, nr_vring;
578 struct rte_vhost_vring vq;
580 uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
585 nr_vring = rte_vhost_get_vring_num(vid);
586 rte_vhost_get_negotiated_features(vid, &hw->req_features);
588 for (i = 0; i < nr_vring; i++) {
589 rte_vhost_get_vhost_vring(vid, i, &vq);
591 size = RTE_ALIGN_CEIL(vring_size(vq.size, PAGE_SIZE),
593 vring_buf = rte_zmalloc("ifcvf", size, PAGE_SIZE);
594 vring_init(&internal->m_vring[i], vq.size, vring_buf,
597 ret = rte_vfio_container_dma_map(internal->vfio_container_fd,
598 (uint64_t)(uintptr_t)vring_buf, m_vring_iova, size);
600 DRV_LOG(ERR, "mediated vring DMA map failed.");
604 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
606 DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
609 hw->vring[i].desc = gpa;
611 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
613 DRV_LOG(ERR, "Fail to get GPA for available ring.");
616 hw->vring[i].avail = gpa;
618 /* Direct I/O for Tx queue, relay for Rx queue */
620 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
622 DRV_LOG(ERR, "Fail to get GPA for used ring.");
625 hw->vring[i].used = gpa;
627 hw->vring[i].used = m_vring_iova +
628 (char *)internal->m_vring[i].used -
629 (char *)internal->m_vring[i].desc;
632 hw->vring[i].size = vq.size;
634 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
635 &hw->vring[i].last_used_idx);
637 m_vring_iova += size;
639 hw->nr_vring = nr_vring;
641 return ifcvf_start_hw(&internal->hw);
644 for (i = 0; i < nr_vring; i++)
645 if (internal->m_vring[i].desc)
646 rte_free(internal->m_vring[i].desc);
652 m_ifcvf_stop(struct ifcvf_internal *internal)
656 struct rte_vhost_vring vq;
657 struct ifcvf_hw *hw = &internal->hw;
658 uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
664 for (i = 0; i < hw->nr_vring; i++) {
665 rte_vhost_get_vhost_vring(vid, i, &vq);
666 len = IFCVF_USED_RING_LEN(vq.size);
667 rte_vhost_log_used_vring(vid, i, 0, len);
669 size = RTE_ALIGN_CEIL(vring_size(vq.size, PAGE_SIZE),
671 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
672 (uint64_t)(uintptr_t)internal->m_vring[i].desc,
675 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
676 hw->vring[i].last_used_idx);
677 rte_free(internal->m_vring[i].desc);
678 m_vring_iova += size;
685 update_used_ring(struct ifcvf_internal *internal, uint16_t qid)
687 rte_vdpa_relay_vring_used(internal->vid, qid, &internal->m_vring[qid]);
688 rte_vhost_vring_call(internal->vid, qid);
692 vring_relay(void *arg)
694 int i, vid, epfd, fd, nfds;
695 struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
696 struct rte_vhost_vring vring;
698 struct epoll_event events[IFCVF_MAX_QUEUES * 4];
699 struct epoll_event ev;
704 q_num = rte_vhost_get_vring_num(vid);
705 /* prepare the mediated vring */
706 for (qid = 0; qid < q_num; qid++)
707 rte_vhost_get_vring_base(vid, qid,
708 &internal->m_vring[qid].avail->idx,
709 &internal->m_vring[qid].used->idx);
711 /* add notify fd and interrupt fd to epoll */
712 epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
714 DRV_LOG(ERR, "failed to create epoll instance.");
717 internal->epfd = epfd;
719 for (qid = 0; qid < q_num; qid++) {
720 ev.events = EPOLLIN | EPOLLPRI;
721 rte_vhost_get_vhost_vring(vid, qid, &vring);
722 ev.data.u64 = qid << 1 | (uint64_t)vring.kickfd << 32;
723 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
724 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
729 for (qid = 0; qid < q_num; qid += 2) {
730 ev.events = EPOLLIN | EPOLLPRI;
731 /* leave a flag to mark it's for interrupt */
732 ev.data.u64 = 1 | qid << 1 |
733 (uint64_t)internal->intr_fd[qid] << 32;
734 if (epoll_ctl(epfd, EPOLL_CTL_ADD, internal->intr_fd[qid], &ev)
736 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
741 /* start relay with a first kick */
742 for (qid = 0; qid < q_num; qid++)
743 ifcvf_notify_queue(&internal->hw, qid);
745 /* listen to the events and react accordingly */
747 nfds = epoll_wait(epfd, events, q_num * 2, -1);
751 DRV_LOG(ERR, "epoll_wait return fail\n");
755 for (i = 0; i < nfds; i++) {
756 fd = (uint32_t)(events[i].data.u64 >> 32);
758 nbytes = read(fd, &buf, 8);
760 if (errno == EINTR ||
761 errno == EWOULDBLOCK ||
764 DRV_LOG(INFO, "Error reading "
771 qid = events[i].data.u32 >> 1;
773 if (events[i].data.u32 & 1)
774 update_used_ring(internal, qid);
776 ifcvf_notify_queue(&internal->hw, qid);
784 setup_vring_relay(struct ifcvf_internal *internal)
788 ret = pthread_create(&internal->tid, NULL, vring_relay,
791 DRV_LOG(ERR, "failed to create ring relay pthread.");
798 unset_vring_relay(struct ifcvf_internal *internal)
803 pthread_cancel(internal->tid);
804 pthread_join(internal->tid, &status);
808 if (internal->epfd >= 0)
809 close(internal->epfd);
816 ifcvf_sw_fallback_switchover(struct ifcvf_internal *internal)
819 int vid = internal->vid;
821 /* stop the direct IO data path */
822 unset_notify_relay(internal);
823 vdpa_ifcvf_stop(internal);
824 vdpa_disable_vfio_intr(internal);
826 ret = rte_vhost_host_notifier_ctrl(vid, false);
827 if (ret && ret != -ENOTSUP)
830 /* set up interrupt for interrupt relay */
831 ret = vdpa_enable_vfio_intr(internal, 1);
836 ret = m_ifcvf_start(internal);
840 /* set up vring relay thread */
841 ret = setup_vring_relay(internal);
845 rte_vhost_host_notifier_ctrl(vid, true);
847 internal->sw_fallback_running = true;
852 m_ifcvf_stop(internal);
854 vdpa_disable_vfio_intr(internal);
856 ifcvf_dma_map(internal, 0);
862 ifcvf_dev_config(int vid)
865 struct internal_list *list;
866 struct ifcvf_internal *internal;
868 did = rte_vhost_get_vdpa_device_id(vid);
869 list = find_internal_resource_by_did(did);
871 DRV_LOG(ERR, "Invalid device id: %d", did);
875 internal = list->internal;
877 rte_atomic32_set(&internal->dev_attached, 1);
878 update_datapath(internal);
880 if (rte_vhost_host_notifier_ctrl(vid, true) != 0)
881 DRV_LOG(NOTICE, "vDPA (%d): software relay is used.", did);
887 ifcvf_dev_close(int vid)
890 struct internal_list *list;
891 struct ifcvf_internal *internal;
893 did = rte_vhost_get_vdpa_device_id(vid);
894 list = find_internal_resource_by_did(did);
896 DRV_LOG(ERR, "Invalid device id: %d", did);
900 internal = list->internal;
902 if (internal->sw_fallback_running) {
903 /* unset ring relay */
904 unset_vring_relay(internal);
907 m_ifcvf_stop(internal);
909 /* remove interrupt setting */
910 vdpa_disable_vfio_intr(internal);
912 /* unset DMA map for guest memory */
913 ifcvf_dma_map(internal, 0);
915 internal->sw_fallback_running = false;
917 rte_atomic32_set(&internal->dev_attached, 0);
918 update_datapath(internal);
925 ifcvf_set_features(int vid)
929 struct internal_list *list;
930 struct ifcvf_internal *internal;
931 uint64_t log_base, log_size;
933 did = rte_vhost_get_vdpa_device_id(vid);
934 list = find_internal_resource_by_did(did);
936 DRV_LOG(ERR, "Invalid device id: %d", did);
940 internal = list->internal;
941 rte_vhost_get_negotiated_features(vid, &features);
943 if (!RTE_VHOST_NEED_LOG(features))
946 if (internal->sw_lm) {
947 ifcvf_sw_fallback_switchover(internal);
949 rte_vhost_get_log_base(vid, &log_base, &log_size);
950 rte_vfio_container_dma_map(internal->vfio_container_fd,
951 log_base, IFCVF_LOG_BASE, log_size);
952 ifcvf_enable_logging(&internal->hw, IFCVF_LOG_BASE, log_size);
959 ifcvf_get_vfio_group_fd(int vid)
962 struct internal_list *list;
964 did = rte_vhost_get_vdpa_device_id(vid);
965 list = find_internal_resource_by_did(did);
967 DRV_LOG(ERR, "Invalid device id: %d", did);
971 return list->internal->vfio_group_fd;
975 ifcvf_get_vfio_device_fd(int vid)
978 struct internal_list *list;
980 did = rte_vhost_get_vdpa_device_id(vid);
981 list = find_internal_resource_by_did(did);
983 DRV_LOG(ERR, "Invalid device id: %d", did);
987 return list->internal->vfio_dev_fd;
991 ifcvf_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
994 struct internal_list *list;
995 struct ifcvf_internal *internal;
996 struct vfio_region_info reg = { .argsz = sizeof(reg) };
999 did = rte_vhost_get_vdpa_device_id(vid);
1000 list = find_internal_resource_by_did(did);
1002 DRV_LOG(ERR, "Invalid device id: %d", did);
1006 internal = list->internal;
1008 reg.index = ifcvf_get_notify_region(&internal->hw);
1009 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, ®);
1011 DRV_LOG(ERR, "Get not get device region info: %s",
1016 *offset = ifcvf_get_queue_notify_off(&internal->hw, qid) + reg.offset;
1023 ifcvf_get_queue_num(int did, uint32_t *queue_num)
1025 struct internal_list *list;
1027 list = find_internal_resource_by_did(did);
1029 DRV_LOG(ERR, "Invalid device id: %d", did);
1033 *queue_num = list->internal->max_queues;
1039 ifcvf_get_vdpa_features(int did, uint64_t *features)
1041 struct internal_list *list;
1043 list = find_internal_resource_by_did(did);
1045 DRV_LOG(ERR, "Invalid device id: %d", did);
1049 *features = list->internal->features;
1054 #define VDPA_SUPPORTED_PROTOCOL_FEATURES \
1055 (1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
1056 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ | \
1057 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
1058 1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
1059 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD)
1061 ifcvf_get_protocol_features(int did __rte_unused, uint64_t *features)
1063 *features = VDPA_SUPPORTED_PROTOCOL_FEATURES;
1067 static struct rte_vdpa_dev_ops ifcvf_ops = {
1068 .get_queue_num = ifcvf_get_queue_num,
1069 .get_features = ifcvf_get_vdpa_features,
1070 .get_protocol_features = ifcvf_get_protocol_features,
1071 .dev_conf = ifcvf_dev_config,
1072 .dev_close = ifcvf_dev_close,
1073 .set_vring_state = NULL,
1074 .set_features = ifcvf_set_features,
1075 .migration_done = NULL,
1076 .get_vfio_group_fd = ifcvf_get_vfio_group_fd,
1077 .get_vfio_device_fd = ifcvf_get_vfio_device_fd,
1078 .get_notify_area = ifcvf_get_notify_area,
1082 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1084 uint16_t *n = extra_args;
1086 if (value == NULL || extra_args == NULL)
1089 *n = (uint16_t)strtoul(value, NULL, 0);
1090 if (*n == USHRT_MAX && errno == ERANGE)
1097 ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1098 struct rte_pci_device *pci_dev)
1101 struct ifcvf_internal *internal = NULL;
1102 struct internal_list *list = NULL;
1104 int sw_fallback_lm = 0;
1105 struct rte_kvargs *kvlist = NULL;
1108 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1111 kvlist = rte_kvargs_parse(pci_dev->device.devargs->args,
1112 ifcvf_valid_arguments);
1116 /* probe only when vdpa mode is specified */
1117 if (rte_kvargs_count(kvlist, IFCVF_VDPA_MODE) == 0) {
1118 rte_kvargs_free(kvlist);
1122 ret = rte_kvargs_process(kvlist, IFCVF_VDPA_MODE, &open_int,
1124 if (ret < 0 || vdpa_mode == 0) {
1125 rte_kvargs_free(kvlist);
1129 list = rte_zmalloc("ifcvf", sizeof(*list), 0);
1133 internal = rte_zmalloc("ifcvf", sizeof(*internal), 0);
1134 if (internal == NULL)
1137 internal->pdev = pci_dev;
1138 rte_spinlock_init(&internal->lock);
1140 if (ifcvf_vfio_setup(internal) < 0) {
1141 DRV_LOG(ERR, "failed to setup device %s", pci_dev->name);
1145 if (ifcvf_init_hw(&internal->hw, internal->pdev) < 0) {
1146 DRV_LOG(ERR, "failed to init device %s", pci_dev->name);
1150 internal->max_queues = IFCVF_MAX_QUEUES;
1151 features = ifcvf_get_features(&internal->hw);
1152 internal->features = (features &
1153 ~(1ULL << VIRTIO_F_IOMMU_PLATFORM)) |
1154 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) |
1155 (1ULL << VIRTIO_NET_F_CTRL_VQ) |
1156 (1ULL << VIRTIO_NET_F_STATUS) |
1157 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) |
1158 (1ULL << VHOST_F_LOG_ALL);
1160 internal->dev_addr.pci_addr = pci_dev->addr;
1161 internal->dev_addr.type = PCI_ADDR;
1162 list->internal = internal;
1164 if (rte_kvargs_count(kvlist, IFCVF_SW_FALLBACK_LM)) {
1165 ret = rte_kvargs_process(kvlist, IFCVF_SW_FALLBACK_LM,
1166 &open_int, &sw_fallback_lm);
1170 internal->sw_lm = sw_fallback_lm;
1172 internal->did = rte_vdpa_register_device(&internal->dev_addr,
1174 if (internal->did < 0) {
1175 DRV_LOG(ERR, "failed to register device %s", pci_dev->name);
1179 pthread_mutex_lock(&internal_list_lock);
1180 TAILQ_INSERT_TAIL(&internal_list, list, next);
1181 pthread_mutex_unlock(&internal_list_lock);
1183 rte_atomic32_set(&internal->started, 1);
1184 update_datapath(internal);
1186 rte_kvargs_free(kvlist);
1190 rte_kvargs_free(kvlist);
1197 ifcvf_pci_remove(struct rte_pci_device *pci_dev)
1199 struct ifcvf_internal *internal;
1200 struct internal_list *list;
1202 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1205 list = find_internal_resource_by_dev(pci_dev);
1207 DRV_LOG(ERR, "Invalid device: %s", pci_dev->name);
1211 internal = list->internal;
1212 rte_atomic32_set(&internal->started, 0);
1213 update_datapath(internal);
1215 rte_pci_unmap_device(internal->pdev);
1216 rte_vfio_container_destroy(internal->vfio_container_fd);
1217 rte_vdpa_unregister_device(internal->did);
1219 pthread_mutex_lock(&internal_list_lock);
1220 TAILQ_REMOVE(&internal_list, list, next);
1221 pthread_mutex_unlock(&internal_list_lock);
1230 * IFCVF has the same vendor ID and device ID as virtio net PCI
1231 * device, with its specific subsystem vendor ID and device ID.
1233 static const struct rte_pci_id pci_id_ifcvf_map[] = {
1234 { .class_id = RTE_CLASS_ANY_ID,
1235 .vendor_id = IFCVF_VENDOR_ID,
1236 .device_id = IFCVF_DEVICE_ID,
1237 .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
1238 .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
1241 { .vendor_id = 0, /* sentinel */
1245 static struct rte_pci_driver rte_ifcvf_vdpa = {
1246 .id_table = pci_id_ifcvf_map,
1248 .probe = ifcvf_pci_probe,
1249 .remove = ifcvf_pci_remove,
1252 RTE_PMD_REGISTER_PCI(net_ifcvf, rte_ifcvf_vdpa);
1253 RTE_PMD_REGISTER_PCI_TABLE(net_ifcvf, pci_id_ifcvf_map);
1254 RTE_PMD_REGISTER_KMOD_DEP(net_ifcvf, "* vfio-pci");
1256 RTE_INIT(ifcvf_vdpa_init_log)
1258 ifcvf_vdpa_logtype = rte_log_register("pmd.net.ifcvf_vdpa");
1259 if (ifcvf_vdpa_logtype >= 0)
1260 rte_log_set_level(ifcvf_vdpa_logtype, RTE_LOG_NOTICE);