New upstream version 18.08upstream/18.08

Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 793 insertions, 0 deletions

diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
new file mode 100644
index 00000000..88d81403
--- /dev/null
+++ b/drivers/net/ifc/ifcvf_vdpa.c
@@ -0,0 +1,793 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/epoll.h>
+
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_bus_pci.h>
+#include <rte_vhost.h>
+#include <rte_vdpa.h>
+#include <rte_vfio.h>
+#include <rte_spinlock.h>
+#include <rte_log.h>
+
+#include "base/ifcvf.h"
+
+#define DRV_LOG(level, fmt, args...) \
+	rte_log(RTE_LOG_ ## level, ifcvf_vdpa_logtype, \
+		"%s(): " fmt "\n", __func__, ##args)
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+
+static int ifcvf_vdpa_logtype;
+
+struct ifcvf_internal {
+	struct rte_vdpa_dev_addr dev_addr;
+	struct rte_pci_device *pdev;
+	struct ifcvf_hw hw;
+	int vfio_container_fd;
+	int vfio_group_fd;
+	int vfio_dev_fd;
+	pthread_t tid;	/* thread for notify relay */
+	int epfd;
+	int vid;
+	int did;
+	uint16_t max_queues;
+	uint64_t features;
+	rte_atomic32_t started;
+	rte_atomic32_t dev_attached;
+	rte_atomic32_t running;
+	rte_spinlock_t lock;
+};
+
+struct internal_list {
+	TAILQ_ENTRY(internal_list) next;
+	struct ifcvf_internal *internal;
+};
+
+TAILQ_HEAD(internal_list_head, internal_list);
+static struct internal_list_head internal_list =
+	TAILQ_HEAD_INITIALIZER(internal_list);
+
+static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static struct internal_list *
+find_internal_resource_by_did(int did)
+{
+	int found = 0;
+	struct internal_list *list;
+
+	pthread_mutex_lock(&internal_list_lock);
+
+	TAILQ_FOREACH(list, &internal_list, next) {
+		if (did == list->internal->did) {
+			found = 1;
+			break;
+		}
+	}
+
+	pthread_mutex_unlock(&internal_list_lock);
+
+	if (!found)
+		return NULL;
+
+	return list;
+}
+
+static struct internal_list *
+find_internal_resource_by_dev(struct rte_pci_device *pdev)
+{
+	int found = 0;
+	struct internal_list *list;
+
+	pthread_mutex_lock(&internal_list_lock);
+
+	TAILQ_FOREACH(list, &internal_list, next) {
+		if (pdev == list->internal->pdev) {
+			found = 1;
+			break;
+		}
+	}
+
+	pthread_mutex_unlock(&internal_list_lock);
+
+	if (!found)
+		return NULL;
+
+	return list;
+}
+
+static int
+ifcvf_vfio_setup(struct ifcvf_internal *internal)
+{
+	struct rte_pci_device *dev = internal->pdev;
+	char devname[RTE_DEV_NAME_MAX_LEN] = {0};
+	int iommu_group_num;
+	int ret = 0;
+	int i;
+
+	internal->vfio_dev_fd = -1;
+	internal->vfio_group_fd = -1;
+	internal->vfio_container_fd = -1;
+
+	rte_pci_device_name(&dev->addr, devname, RTE_DEV_NAME_MAX_LEN);
+	rte_vfio_get_group_num(rte_pci_get_sysfs_path(), devname,
+			&iommu_group_num);
+
+	internal->vfio_container_fd = rte_vfio_container_create();
+	if (internal->vfio_container_fd < 0)
+		return -1;
+
+	internal->vfio_group_fd = rte_vfio_container_group_bind(
+			internal->vfio_container_fd, iommu_group_num);
+	if (internal->vfio_group_fd < 0)
+		goto err;
+
+	if (rte_pci_map_device(dev))
+		goto err;
+
+	internal->vfio_dev_fd = dev->intr_handle.vfio_dev_fd;
+
+	for (i = 0; i < RTE_MIN(PCI_MAX_RESOURCE, IFCVF_PCI_MAX_RESOURCE);
+			i++) {
+		internal->hw.mem_resource[i].addr =
+			internal->pdev->mem_resource[i].addr;
+		internal->hw.mem_resource[i].phys_addr =
+			internal->pdev->mem_resource[i].phys_addr;
+		internal->hw.mem_resource[i].len =
+			internal->pdev->mem_resource[i].len;
+	}
+	ret = ifcvf_init_hw(&internal->hw, internal->pdev);
+
+	return ret;
+
+err:
+	rte_vfio_container_destroy(internal->vfio_container_fd);
+	return -1;
+}
+
+static int
+ifcvf_dma_map(struct ifcvf_internal *internal, int do_map)
+{
+	uint32_t i;
+	int ret;
+	struct rte_vhost_memory *mem = NULL;
+	int vfio_container_fd;
+
+	ret = rte_vhost_get_mem_table(internal->vid, &mem);
+	if (ret < 0) {
+		DRV_LOG(ERR, "failed to get VM memory layout.");
+		goto exit;
+	}
+
+	vfio_container_fd = internal->vfio_container_fd;
+
+	for (i = 0; i < mem->nregions; i++) {
+		struct rte_vhost_mem_region *reg;
+
+		reg = &mem->regions[i];
+		DRV_LOG(INFO, "%s, region %u: HVA 0x%" PRIx64 ", "
+			"GPA 0x%" PRIx64 ", size 0x%" PRIx64 ".",
+			do_map ? "DMA map" : "DMA unmap", i,
+			reg->host_user_addr, reg->guest_phys_addr, reg->size);
+
+		if (do_map) {
+			ret = rte_vfio_container_dma_map(vfio_container_fd,
+				reg->host_user_addr, reg->guest_phys_addr,
+				reg->size);
+			if (ret < 0) {
+				DRV_LOG(ERR, "DMA map failed.");
+				goto exit;
+			}
+		} else {
+			ret = rte_vfio_container_dma_unmap(vfio_container_fd,
+				reg->host_user_addr, reg->guest_phys_addr,
+				reg->size);
+			if (ret < 0) {
+				DRV_LOG(ERR, "DMA unmap failed.");
+				goto exit;
+			}
+		}
+	}
+
+exit:
+	if (mem)
+		free(mem);
+	return ret;
+}
+
+static uint64_t
+qva_to_gpa(int vid, uint64_t qva)
+{
+	struct rte_vhost_memory *mem = NULL;
+	struct rte_vhost_mem_region *reg;
+	uint32_t i;
+	uint64_t gpa = 0;
+
+	if (rte_vhost_get_mem_table(vid, &mem) < 0)
+		goto exit;
+
+	for (i = 0; i < mem->nregions; i++) {
+		reg = &mem->regions[i];
+
+		if (qva >= reg->host_user_addr &&
+				qva < reg->host_user_addr + reg->size) {
+			gpa = qva - reg->host_user_addr + reg->guest_phys_addr;
+			break;
+		}
+	}
+
+exit:
+	if (mem)
+		free(mem);
+	return gpa;
+}
+
+static int
+vdpa_ifcvf_start(struct ifcvf_internal *internal)
+{
+	struct ifcvf_hw *hw = &internal->hw;
+	int i, nr_vring;
+	int vid;
+	struct rte_vhost_vring vq;
+	uint64_t gpa;
+
+	vid = internal->vid;
+	nr_vring = rte_vhost_get_vring_num(vid);
+	rte_vhost_get_negotiated_features(vid, &hw->req_features);
+
+	for (i = 0; i < nr_vring; i++) {
+		rte_vhost_get_vhost_vring(vid, i, &vq);
+		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
+		if (gpa == 0) {
+			DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
+			return -1;
+		}
+		hw->vring[i].desc = gpa;
+
+		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
+		if (gpa == 0) {
+			DRV_LOG(ERR, "Fail to get GPA for available ring.");
+			return -1;
+		}
+		hw->vring[i].avail = gpa;
+
+		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
+		if (gpa == 0) {
+			DRV_LOG(ERR, "Fail to get GPA for used ring.");
+			return -1;
+		}
+		hw->vring[i].used = gpa;
+
+		hw->vring[i].size = vq.size;
+		rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
+				&hw->vring[i].last_used_idx);
+	}
+	hw->nr_vring = i;
+
+	return ifcvf_start_hw(&internal->hw);
+}
+
+static void
+vdpa_ifcvf_stop(struct ifcvf_internal *internal)
+{
+	struct ifcvf_hw *hw = &internal->hw;
+	uint32_t i;
+	int vid;
+
+	vid = internal->vid;
+	ifcvf_stop_hw(hw);
+
+	for (i = 0; i < hw->nr_vring; i++)
+		rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
+				hw->vring[i].last_used_idx);
+}
+
+#define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
+		sizeof(int) * (IFCVF_MAX_QUEUES * 2 + 1))
+static int
+vdpa_enable_vfio_intr(struct ifcvf_internal *internal)
+{
+	int ret;
+	uint32_t i, nr_vring;
+	char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
+	struct vfio_irq_set *irq_set;
+	int *fd_ptr;
+	struct rte_vhost_vring vring;
+
+	nr_vring = rte_vhost_get_vring_num(internal->vid);
+
+	irq_set = (struct vfio_irq_set *)irq_set_buf;
+	irq_set->argsz = sizeof(irq_set_buf);
+	irq_set->count = nr_vring + 1;
+	irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
+			 VFIO_IRQ_SET_ACTION_TRIGGER;
+	irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
+	irq_set->start = 0;
+	fd_ptr = (int *)&irq_set->data;
+	fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] = internal->pdev->intr_handle.fd;
+
+	for (i = 0; i < nr_vring; i++) {
+		rte_vhost_get_vhost_vring(internal->vid, i, &vring);
+		fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
+	}
+
+	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+	if (ret) {
+		DRV_LOG(ERR, "Error enabling MSI-X interrupts: %s",
+				strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+vdpa_disable_vfio_intr(struct ifcvf_internal *internal)
+{
+	int ret;
+	char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
+	struct vfio_irq_set *irq_set;
+
+	irq_set = (struct vfio_irq_set *)irq_set_buf;
+	irq_set->argsz = sizeof(irq_set_buf);
+	irq_set->count = 0;
+	irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
+	irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
+	irq_set->start = 0;
+
+	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+	if (ret) {
+		DRV_LOG(ERR, "Error disabling MSI-X interrupts: %s",
+				strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+static void *
+notify_relay(void *arg)
+{
+	int i, kickfd, epfd, nfds = 0;
+	uint32_t qid, q_num;
+	struct epoll_event events[IFCVF_MAX_QUEUES * 2];
+	struct epoll_event ev;
+	uint64_t buf;
+	int nbytes;
+	struct rte_vhost_vring vring;
+	struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
+	struct ifcvf_hw *hw = &internal->hw;
+
+	q_num = rte_vhost_get_vring_num(internal->vid);
+
+	epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
+	if (epfd < 0) {
+		DRV_LOG(ERR, "failed to create epoll instance.");
+		return NULL;
+	}
+	internal->epfd = epfd;
+
+	for (qid = 0; qid < q_num; qid++) {
+		ev.events = EPOLLIN | EPOLLPRI;
+		rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
+		ev.data.u64 = qid | (uint64_t)vring.kickfd << 32;
+		if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
+			DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
+			return NULL;
+		}
+	}
+
+	for (;;) {
+		nfds = epoll_wait(epfd, events, q_num, -1);
+		if (nfds < 0) {
+			if (errno == EINTR)
+				continue;
+			DRV_LOG(ERR, "epoll_wait return fail\n");
+			return NULL;
+		}
+
+		for (i = 0; i < nfds; i++) {
+			qid = events[i].data.u32;
+			kickfd = (uint32_t)(events[i].data.u64 >> 32);
+			do {
+				nbytes = read(kickfd, &buf, 8);
+				if (nbytes < 0) {
+					if (errno == EINTR ||
+					    errno == EWOULDBLOCK ||
+					    errno == EAGAIN)
+						continue;
+					DRV_LOG(INFO, "Error reading "
+						"kickfd: %s",
+						strerror(errno));
+				}
+				break;
+			} while (1);
+
+			ifcvf_notify_queue(hw, qid);
+		}
+	}
+
+	return NULL;
+}
+
+static int
+setup_notify_relay(struct ifcvf_internal *internal)
+{
+	int ret;
+
+	ret = pthread_create(&internal->tid, NULL, notify_relay,
+			(void *)internal);
+	if (ret) {
+		DRV_LOG(ERR, "failed to create notify relay pthread.");
+		return -1;
+	}
+	return 0;
+}
+
+static int
+unset_notify_relay(struct ifcvf_internal *internal)
+{
+	void *status;
+
+	if (internal->tid) {
+		pthread_cancel(internal->tid);
+		pthread_join(internal->tid, &status);
+	}
+	internal->tid = 0;
+
+	if (internal->epfd >= 0)
+		close(internal->epfd);
+	internal->epfd = -1;
+
+	return 0;
+}
+
+static int
+update_datapath(struct ifcvf_internal *internal)
+{
+	int ret;
+
+	rte_spinlock_lock(&internal->lock);
+
+	if (!rte_atomic32_read(&internal->running) &&
+	    (rte_atomic32_read(&internal->started) &&
+	     rte_atomic32_read(&internal->dev_attached))) {
+		ret = ifcvf_dma_map(internal, 1);
+		if (ret)
+			goto err;
+
+		ret = vdpa_enable_vfio_intr(internal);
+		if (ret)
+			goto err;
+
+		ret = setup_notify_relay(internal);
+		if (ret)
+			goto err;
+
+		ret = vdpa_ifcvf_start(internal);
+		if (ret)
+			goto err;
+
+		rte_atomic32_set(&internal->running, 1);
+	} else if (rte_atomic32_read(&internal->running) &&
+		   (!rte_atomic32_read(&internal->started) ||
+		    !rte_atomic32_read(&internal->dev_attached))) {
+		vdpa_ifcvf_stop(internal);
+
+		ret = unset_notify_relay(internal);
+		if (ret)
+			goto err;
+
+		ret = vdpa_disable_vfio_intr(internal);
+		if (ret)
+			goto err;
+
+		ret = ifcvf_dma_map(internal, 0);
+		if (ret)
+			goto err;
+
+		rte_atomic32_set(&internal->running, 0);
+	}
+
+	rte_spinlock_unlock(&internal->lock);
+	return 0;
+err:
+	rte_spinlock_unlock(&internal->lock);
+	return ret;
+}
+
+static int
+ifcvf_dev_config(int vid)
+{
+	int did;
+	struct internal_list *list;
+	struct ifcvf_internal *internal;
+
+	did = rte_vhost_get_vdpa_device_id(vid);
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	internal = list->internal;
+	internal->vid = vid;
+	rte_atomic32_set(&internal->dev_attached, 1);
+	update_datapath(internal);
+
+	return 0;
+}
+
+static int
+ifcvf_dev_close(int vid)
+{
+	int did;
+	struct internal_list *list;
+	struct ifcvf_internal *internal;
+
+	did = rte_vhost_get_vdpa_device_id(vid);
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	internal = list->internal;
+	rte_atomic32_set(&internal->dev_attached, 0);
+	update_datapath(internal);
+
+	return 0;
+}
+
+static int
+ifcvf_get_vfio_group_fd(int vid)
+{
+	int did;
+	struct internal_list *list;
+
+	did = rte_vhost_get_vdpa_device_id(vid);
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	return list->internal->vfio_group_fd;
+}
+
+static int
+ifcvf_get_vfio_device_fd(int vid)
+{
+	int did;
+	struct internal_list *list;
+
+	did = rte_vhost_get_vdpa_device_id(vid);
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	return list->internal->vfio_dev_fd;
+}
+
+static int
+ifcvf_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
+{
+	int did;
+	struct internal_list *list;
+	struct ifcvf_internal *internal;
+	struct vfio_region_info reg = { .argsz = sizeof(reg) };
+	int ret;
+
+	did = rte_vhost_get_vdpa_device_id(vid);
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	internal = list->internal;
+
+	reg.index = ifcvf_get_notify_region(&internal->hw);
+	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, &reg);
+	if (ret) {
+		DRV_LOG(ERR, "Get not get device region info: %s",
+				strerror(errno));
+		return -1;
+	}
+
+	*offset = ifcvf_get_queue_notify_off(&internal->hw, qid) + reg.offset;
+	*size = 0x1000;
+
+	return 0;
+}
+
+static int
+ifcvf_get_queue_num(int did, uint32_t *queue_num)
+{
+	struct internal_list *list;
+
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	*queue_num = list->internal->max_queues;
+
+	return 0;
+}
+
+static int
+ifcvf_get_vdpa_features(int did, uint64_t *features)
+{
+	struct internal_list *list;
+
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	*features = list->internal->features;
+
+	return 0;
+}
+
+#define VDPA_SUPPORTED_PROTOCOL_FEATURES \
+		(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
+		 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ | \
+		 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
+		 1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
+		 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD)
+static int
+ifcvf_get_protocol_features(int did __rte_unused, uint64_t *features)
+{
+	*features = VDPA_SUPPORTED_PROTOCOL_FEATURES;
+	return 0;
+}
+
+struct rte_vdpa_dev_ops ifcvf_ops = {
+	.get_queue_num = ifcvf_get_queue_num,
+	.get_features = ifcvf_get_vdpa_features,
+	.get_protocol_features = ifcvf_get_protocol_features,
+	.dev_conf = ifcvf_dev_config,
+	.dev_close = ifcvf_dev_close,
+	.set_vring_state = NULL,
+	.set_features = NULL,
+	.migration_done = NULL,
+	.get_vfio_group_fd = ifcvf_get_vfio_group_fd,
+	.get_vfio_device_fd = ifcvf_get_vfio_device_fd,
+	.get_notify_area = ifcvf_get_notify_area,
+};
+
+static int
+ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+		struct rte_pci_device *pci_dev)
+{
+	uint64_t features;
+	struct ifcvf_internal *internal = NULL;
+	struct internal_list *list = NULL;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
+	list = rte_zmalloc("ifcvf", sizeof(*list), 0);
+	if (list == NULL)
+		goto error;
+
+	internal = rte_zmalloc("ifcvf", sizeof(*internal), 0);
+	if (internal == NULL)
+		goto error;
+
+	internal->pdev = pci_dev;
+	rte_spinlock_init(&internal->lock);
+	if (ifcvf_vfio_setup(internal) < 0)
+		return -1;
+
+	internal->max_queues = IFCVF_MAX_QUEUES;
+	features = ifcvf_get_features(&internal->hw);
+	internal->features = (features &
+		~(1ULL << VIRTIO_F_IOMMU_PLATFORM)) |
+		(1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
+
+	internal->dev_addr.pci_addr = pci_dev->addr;
+	internal->dev_addr.type = PCI_ADDR;
+	list->internal = internal;
+
+	pthread_mutex_lock(&internal_list_lock);
+	TAILQ_INSERT_TAIL(&internal_list, list, next);
+	pthread_mutex_unlock(&internal_list_lock);
+
+	internal->did = rte_vdpa_register_device(&internal->dev_addr,
+				&ifcvf_ops);
+	if (internal->did < 0)
+		goto error;
+
+	rte_atomic32_set(&internal->started, 1);
+	update_datapath(internal);
+
+	return 0;
+
+error:
+	rte_free(list);
+	rte_free(internal);
+	return -1;
+}
+
+static int
+ifcvf_pci_remove(struct rte_pci_device *pci_dev)
+{
+	struct ifcvf_internal *internal;
+	struct internal_list *list;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
+	list = find_internal_resource_by_dev(pci_dev);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device: %s", pci_dev->name);
+		return -1;
+	}
+
+	internal = list->internal;
+	rte_atomic32_set(&internal->started, 0);
+	update_datapath(internal);
+
+	rte_pci_unmap_device(internal->pdev);
+	rte_vfio_container_destroy(internal->vfio_container_fd);
+	rte_vdpa_unregister_device(internal->did);
+
+	pthread_mutex_lock(&internal_list_lock);
+	TAILQ_REMOVE(&internal_list, list, next);
+	pthread_mutex_unlock(&internal_list_lock);
+
+	rte_free(list);
+	rte_free(internal);
+
+	return 0;
+}
+
+/*
+ * IFCVF has the same vendor ID and device ID as virtio net PCI
+ * device, with its specific subsystem vendor ID and device ID.
+ */
+static const struct rte_pci_id pci_id_ifcvf_map[] = {
+	{ .class_id = RTE_CLASS_ANY_ID,
+	  .vendor_id = IFCVF_VENDOR_ID,
+	  .device_id = IFCVF_DEVICE_ID,
+	  .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
+	  .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
+	},
+
+	{ .vendor_id = 0, /* sentinel */
+	},
+};
+
+static struct rte_pci_driver rte_ifcvf_vdpa = {
+	.id_table = pci_id_ifcvf_map,
+	.drv_flags = 0,
+	.probe = ifcvf_pci_probe,
+	.remove = ifcvf_pci_remove,
+};
+
+RTE_PMD_REGISTER_PCI(net_ifcvf, rte_ifcvf_vdpa);
+RTE_PMD_REGISTER_PCI_TABLE(net_ifcvf, pci_id_ifcvf_map);
+RTE_PMD_REGISTER_KMOD_DEP(net_ifcvf, "* vfio-pci");
+
+RTE_INIT(ifcvf_vdpa_init_log)
+{
+	ifcvf_vdpa_logtype = rte_log_register("pmd.net.ifcvf_vdpa");
+	if (ifcvf_vdpa_logtype >= 0)
+		rte_log_set_level(ifcvf_vdpa_logtype, RTE_LOG_NOTICE);
+}