#include <rte_malloc.h>
#include <rte_log.h>
+#include "iotlb.h"
#include "vhost.h"
#include "vhost_user.h"
+#define VIRTIO_MIN_MTU 68
+#define VIRTIO_MAX_MTU 65535
+
static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_NONE] = "VHOST_USER_NONE",
[VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
[VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
[VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
[VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
+ [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
+ [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
+ [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
};
-struct orig_region_map {
- int fd;
- uint64_t mapped_address;
- uint64_t mapped_size;
- uint64_t blksz;
-};
-
-#define orig_region(ptr, nregions) \
- ((struct orig_region_map *)RTE_PTR_ADD((ptr), \
- sizeof(struct virtio_memory) + \
- sizeof(struct virtio_memory_regions) * (nregions)))
-
static uint64_t
get_blk_size(int fd)
{
static void
free_mem_region(struct virtio_net *dev)
{
- struct orig_region_map *region;
- unsigned int idx;
+ uint32_t i;
+ struct rte_vhost_mem_region *reg;
if (!dev || !dev->mem)
return;
- region = orig_region(dev->mem, dev->mem->nregions);
- for (idx = 0; idx < dev->mem->nregions; idx++) {
- if (region[idx].mapped_address) {
- munmap((void *)(uintptr_t)region[idx].mapped_address,
- region[idx].mapped_size);
- close(region[idx].fd);
+ for (i = 0; i < dev->mem->nregions; i++) {
+ reg = &dev->mem->regions[i];
+ if (reg->host_user_addr) {
+ munmap(reg->mmap_addr, reg->mmap_size);
+ close(reg->fd);
}
}
}
{
if (dev->mem) {
free_mem_region(dev);
- free(dev->mem);
+ rte_free(dev->mem);
dev->mem = NULL;
}
+
+ free(dev->guest_pages);
+ dev->guest_pages = NULL;
+
if (dev->log_addr) {
munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
dev->log_addr = 0;
}
+
+ if (dev->slave_req_fd >= 0) {
+ close(dev->slave_req_fd);
+ dev->slave_req_fd = -1;
+ }
}
/*
{
if (dev->flags & VIRTIO_DEV_RUNNING) {
dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
+ dev->notify_ops->destroy_device(dev->vid);
}
cleanup_device(dev, 0);
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(void)
+vhost_user_get_features(struct virtio_net *dev)
{
- return VHOST_FEATURES;
+ uint64_t features = 0;
+
+ rte_vhost_driver_get_features(dev->ifname, &features);
+ return features;
}
/*
static int
vhost_user_set_features(struct virtio_net *dev, uint64_t features)
{
- if (features & ~VHOST_FEATURES)
+ uint64_t vhost_features = 0;
+
+ rte_vhost_driver_get_features(dev->ifname, &vhost_features);
+ if (features & ~vhost_features) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) received invalid negotiated features.\n",
+ dev->vid);
return -1;
+ }
+
+ if ((dev->flags & VIRTIO_DEV_RUNNING) && dev->features != features) {
+ if (dev->notify_ops->features_changed)
+ dev->notify_ops->features_changed(dev->vid, features);
+ }
dev->features = features;
if (dev->features &
*/
static int
vhost_user_set_vring_num(struct virtio_net *dev,
- struct vhost_vring_state *state)
+ VhostUserMsg *msg)
{
- dev->virtqueue[state->index]->size = state->num;
+ struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
+
+ vq->size = msg->payload.state.num;
+
+ if (dev->dequeue_zero_copy) {
+ vq->nr_zmbuf = 0;
+ vq->last_zmbuf_idx = 0;
+ vq->zmbuf_size = vq->size;
+ vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
+ sizeof(struct zcopy_mbuf), 0);
+ if (vq->zmbufs == NULL) {
+ RTE_LOG(WARNING, VHOST_CONFIG,
+ "failed to allocate mem for zero copy; "
+ "zero copy is force disabled\n");
+ dev->dequeue_zero_copy = 0;
+ }
+ }
+
+ vq->shadow_used_ring = rte_malloc(NULL,
+ vq->size * sizeof(struct vring_used_elem),
+ RTE_CACHE_LINE_SIZE);
+ if (!vq->shadow_used_ring) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to allocate memory for shadow used ring.\n");
+ return -1;
+ }
+
+ vq->batch_copy_elems = rte_malloc(NULL,
+ vq->size * sizeof(struct batch_copy_elem),
+ RTE_CACHE_LINE_SIZE);
+ if (!vq->batch_copy_elems) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to allocate memory for batching copy.\n");
+ return -1;
+ }
return 0;
}
struct vhost_virtqueue *old_vq, *vq;
int ret;
- /*
- * vq is allocated on pairs, we should try to do realloc
- * on first queue of one queue pair only.
- */
- if (index % VIRTIO_QNUM != 0)
- return dev;
-
old_dev = dev;
vq = old_vq = dev->virtqueue[index];
if (oldnode != newnode) {
RTE_LOG(INFO, VHOST_CONFIG,
"reallocate vq from %d to %d node\n", oldnode, newnode);
- vq = rte_malloc_socket(NULL, sizeof(*vq) * VIRTIO_QNUM, 0,
- newnode);
+ vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
if (!vq)
return dev;
- memcpy(vq, old_vq, sizeof(*vq) * VIRTIO_QNUM);
+ memcpy(vq, old_vq, sizeof(*vq));
rte_free(old_vq);
}
out:
dev->virtqueue[index] = vq;
- dev->virtqueue[index + 1] = vq + 1;
vhost_devices[dev->vid] = dev;
+ if (old_vq != vq)
+ vhost_user_iotlb_init(dev, index);
+
return dev;
}
#else
}
#endif
-/*
- * Converts QEMU virtual address to Vhost virtual address. This function is
- * used to convert the ring addresses to our address space.
- */
+/* Converts QEMU virtual address to Vhost virtual address. */
static uint64_t
-qva_to_vva(struct virtio_net *dev, uint64_t qemu_va)
+qva_to_vva(struct virtio_net *dev, uint64_t qva)
{
- struct virtio_memory_regions *region;
- uint64_t vhost_va = 0;
- uint32_t regionidx = 0;
+ struct rte_vhost_mem_region *reg;
+ uint32_t i;
/* Find the region where the address lives. */
- for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- region = &dev->mem->regions[regionidx];
- if ((qemu_va >= region->userspace_address) &&
- (qemu_va <= region->userspace_address +
- region->memory_size)) {
- vhost_va = qemu_va + region->guest_phys_address +
- region->address_offset -
- region->userspace_address;
- break;
+ for (i = 0; i < dev->mem->nregions; i++) {
+ reg = &dev->mem->regions[i];
+
+ if (qva >= reg->guest_user_addr &&
+ qva < reg->guest_user_addr + reg->size) {
+ return qva - reg->guest_user_addr +
+ reg->host_user_addr;
}
}
- return vhost_va;
+
+ return 0;
}
+
/*
- * The virtio device sends us the desc, used and avail ring addresses.
- * This function then converts these to our address space.
+ * Converts ring address to Vhost virtual address.
+ * If IOMMU is enabled, the ring address is a guest IO virtual address,
+ * else it is a QEMU virtual address.
*/
-static int
-vhost_user_set_vring_addr(struct virtio_net *dev, struct vhost_vring_addr *addr)
+static uint64_t
+ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t ra, uint64_t size)
{
- struct vhost_virtqueue *vq;
+ if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
+ uint64_t vva;
- if (dev->mem == NULL)
- return -1;
+ vva = vhost_user_iotlb_cache_find(vq, ra,
+ &size, VHOST_ACCESS_RW);
+ if (!vva)
+ vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
- /* addr->index refers to the queue index. The txq 1, rxq is 0. */
- vq = dev->virtqueue[addr->index];
+ return vva;
+ }
+
+ return qva_to_vva(dev, ra);
+}
+
+static struct virtio_net *
+translate_ring_addresses(struct virtio_net *dev, int vq_index)
+{
+ struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
+ struct vhost_vring_addr *addr = &vq->ring_addrs;
/* The addresses are converted from QEMU virtual to Vhost virtual. */
- vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
- addr->desc_user_addr);
+ if (vq->desc && vq->avail && vq->used)
+ return dev;
+
+ vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->desc_user_addr, sizeof(struct vring_desc));
if (vq->desc == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
+ RTE_LOG(DEBUG, VHOST_CONFIG,
"(%d) failed to find desc ring address.\n",
dev->vid);
- return -1;
+ return dev;
}
- dev = numa_realloc(dev, addr->index);
- vq = dev->virtqueue[addr->index];
+ dev = numa_realloc(dev, vq_index);
+ vq = dev->virtqueue[vq_index];
+ addr = &vq->ring_addrs;
- vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
- addr->avail_user_addr);
+ vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->avail_user_addr, sizeof(struct vring_avail));
if (vq->avail == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
+ RTE_LOG(DEBUG, VHOST_CONFIG,
"(%d) failed to find avail ring address.\n",
dev->vid);
- return -1;
+ return dev;
}
- vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
- addr->used_user_addr);
+ vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->used_user_addr, sizeof(struct vring_used));
if (vq->used == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
+ RTE_LOG(DEBUG, VHOST_CONFIG,
"(%d) failed to find used ring address.\n",
dev->vid);
- return -1;
+ return dev;
}
if (vq->last_used_idx != vq->used->idx) {
"last_used_idx (%u) and vq->used->idx (%u) mismatches; "
"some packets maybe resent for Tx and dropped for Rx\n",
vq->last_used_idx, vq->used->idx);
- vq->last_used_idx = vq->used->idx;
+ vq->last_used_idx = vq->used->idx;
+ vq->last_avail_idx = vq->used->idx;
}
vq->log_guest_addr = addr->log_guest_addr;
LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
dev->vid, vq->log_guest_addr);
+ return dev;
+}
+
+/*
+ * The virtio device sends us the desc, used and avail ring addresses.
+ * This function then converts these to our address space.
+ */
+static int
+vhost_user_set_vring_addr(struct virtio_net **pdev, VhostUserMsg *msg)
+{
+ struct vhost_virtqueue *vq;
+ struct vhost_vring_addr *addr = &msg->payload.addr;
+ struct virtio_net *dev = *pdev;
+
+ if (dev->mem == NULL)
+ return -1;
+
+ /* addr->index refers to the queue index. The txq 1, rxq is 0. */
+ vq = dev->virtqueue[msg->payload.addr.index];
+
+ /*
+ * Rings addresses should not be interpreted as long as the ring is not
+ * started and enabled
+ */
+ memcpy(&vq->ring_addrs, addr, sizeof(*addr));
+
+ vring_invalidate(dev, vq);
+
+ if (vq->enabled && (dev->features &
+ (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
+ dev = translate_ring_addresses(dev, msg->payload.state.index);
+ if (!dev)
+ return -1;
+
+ *pdev = dev;
+ }
+
return 0;
}
*/
static int
vhost_user_set_vring_base(struct virtio_net *dev,
- struct vhost_vring_state *state)
+ VhostUserMsg *msg)
{
- dev->virtqueue[state->index]->last_used_idx = state->num;
+ dev->virtqueue[msg->payload.state.index]->last_used_idx =
+ msg->payload.state.num;
+ dev->virtqueue[msg->payload.state.index]->last_avail_idx =
+ msg->payload.state.num;
return 0;
}
+static void
+add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
+ uint64_t host_phys_addr, uint64_t size)
+{
+ struct guest_page *page, *last_page;
+
+ if (dev->nr_guest_pages == dev->max_guest_pages) {
+ dev->max_guest_pages *= 2;
+ dev->guest_pages = realloc(dev->guest_pages,
+ dev->max_guest_pages * sizeof(*page));
+ }
+
+ if (dev->nr_guest_pages > 0) {
+ last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
+ /* merge if the two pages are continuous */
+ if (host_phys_addr == last_page->host_phys_addr +
+ last_page->size) {
+ last_page->size += size;
+ return;
+ }
+ }
+
+ page = &dev->guest_pages[dev->nr_guest_pages++];
+ page->guest_phys_addr = guest_phys_addr;
+ page->host_phys_addr = host_phys_addr;
+ page->size = size;
+}
+
+static void
+add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
+ uint64_t page_size)
+{
+ uint64_t reg_size = reg->size;
+ uint64_t host_user_addr = reg->host_user_addr;
+ uint64_t guest_phys_addr = reg->guest_phys_addr;
+ uint64_t host_phys_addr;
+ uint64_t size;
+
+ host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
+ size = page_size - (guest_phys_addr & (page_size - 1));
+ size = RTE_MIN(size, reg_size);
+
+ add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+ host_user_addr += size;
+ guest_phys_addr += size;
+ reg_size -= size;
+
+ while (reg_size > 0) {
+ size = RTE_MIN(reg_size, page_size);
+ host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
+ host_user_addr);
+ add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+
+ host_user_addr += size;
+ guest_phys_addr += size;
+ reg_size -= size;
+ }
+}
+
+#ifdef RTE_LIBRTE_VHOST_DEBUG
+/* TODO: enable it only in debug mode? */
+static void
+dump_guest_pages(struct virtio_net *dev)
+{
+ uint32_t i;
+ struct guest_page *page;
+
+ for (i = 0; i < dev->nr_guest_pages; i++) {
+ page = &dev->guest_pages[i];
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "guest physical page region %u\n"
+ "\t guest_phys_addr: %" PRIx64 "\n"
+ "\t host_phys_addr : %" PRIx64 "\n"
+ "\t size : %" PRIx64 "\n",
+ i,
+ page->guest_phys_addr,
+ page->host_phys_addr,
+ page->size);
+ }
+}
+#else
+#define dump_guest_pages(dev)
+#endif
+
static int
vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
{
struct VhostUserMemory memory = pmsg->payload.memory;
- struct virtio_memory_regions *pregion;
- uint64_t mapped_address, mapped_size;
- unsigned int idx = 0;
- struct orig_region_map *pregion_orig;
+ struct rte_vhost_mem_region *reg;
+ void *mmap_addr;
+ uint64_t mmap_size;
+ uint64_t mmap_offset;
uint64_t alignment;
-
- /* Remove from the data plane. */
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
- }
+ uint32_t i;
+ int fd;
if (dev->mem) {
free_mem_region(dev);
- free(dev->mem);
+ rte_free(dev->mem);
dev->mem = NULL;
}
- dev->mem = calloc(1,
- sizeof(struct virtio_memory) +
- sizeof(struct virtio_memory_regions) * memory.nregions +
- sizeof(struct orig_region_map) * memory.nregions);
+ dev->nr_guest_pages = 0;
+ if (!dev->guest_pages) {
+ dev->max_guest_pages = 8;
+ dev->guest_pages = malloc(dev->max_guest_pages *
+ sizeof(struct guest_page));
+ if (dev->guest_pages == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) failed to allocate memory "
+ "for dev->guest_pages\n",
+ dev->vid);
+ return -1;
+ }
+ }
+
+ dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
+ sizeof(struct rte_vhost_mem_region) * memory.nregions, 0);
if (dev->mem == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) failed to allocate memory for dev->mem\n",
}
dev->mem->nregions = memory.nregions;
- pregion_orig = orig_region(dev->mem, memory.nregions);
- for (idx = 0; idx < memory.nregions; idx++) {
- pregion = &dev->mem->regions[idx];
- pregion->guest_phys_address =
- memory.regions[idx].guest_phys_addr;
- pregion->guest_phys_address_end =
- memory.regions[idx].guest_phys_addr +
- memory.regions[idx].memory_size;
- pregion->memory_size =
- memory.regions[idx].memory_size;
- pregion->userspace_address =
- memory.regions[idx].userspace_addr;
-
- /* This is ugly */
- mapped_size = memory.regions[idx].memory_size +
- memory.regions[idx].mmap_offset;
+ for (i = 0; i < memory.nregions; i++) {
+ fd = pmsg->fds[i];
+ reg = &dev->mem->regions[i];
+
+ reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
+ reg->guest_user_addr = memory.regions[i].userspace_addr;
+ reg->size = memory.regions[i].memory_size;
+ reg->fd = fd;
+
+ mmap_offset = memory.regions[i].mmap_offset;
+ mmap_size = reg->size + mmap_offset;
/* mmap() without flag of MAP_ANONYMOUS, should be called
* with length argument aligned with hugepagesz at older
* to avoid failure, make sure in caller to keep length
* aligned.
*/
- alignment = get_blk_size(pmsg->fds[idx]);
+ alignment = get_blk_size(fd);
if (alignment == (uint64_t)-1) {
RTE_LOG(ERR, VHOST_CONFIG,
"couldn't get hugepage size through fstat\n");
goto err_mmap;
}
- mapped_size = RTE_ALIGN_CEIL(mapped_size, alignment);
-
- mapped_address = (uint64_t)(uintptr_t)mmap(NULL,
- mapped_size,
- PROT_READ | PROT_WRITE, MAP_SHARED,
- pmsg->fds[idx],
- 0);
+ mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
- RTE_LOG(INFO, VHOST_CONFIG,
- "mapped region %d fd:%d to:%p sz:0x%"PRIx64" "
- "off:0x%"PRIx64" align:0x%"PRIx64"\n",
- idx, pmsg->fds[idx], (void *)(uintptr_t)mapped_address,
- mapped_size, memory.regions[idx].mmap_offset,
- alignment);
+ mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_POPULATE, fd, 0);
- if (mapped_address == (uint64_t)(uintptr_t)MAP_FAILED) {
+ if (mmap_addr == MAP_FAILED) {
RTE_LOG(ERR, VHOST_CONFIG,
- "mmap qemu guest failed.\n");
+ "mmap region %u failed.\n", i);
goto err_mmap;
}
- pregion_orig[idx].mapped_address = mapped_address;
- pregion_orig[idx].mapped_size = mapped_size;
- pregion_orig[idx].blksz = alignment;
- pregion_orig[idx].fd = pmsg->fds[idx];
+ reg->mmap_addr = mmap_addr;
+ reg->mmap_size = mmap_size;
+ reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
+ mmap_offset;
- mapped_address += memory.regions[idx].mmap_offset;
+ if (dev->dequeue_zero_copy)
+ add_guest_pages(dev, reg, alignment);
- pregion->address_offset = mapped_address -
- pregion->guest_phys_address;
-
- if (memory.regions[idx].guest_phys_addr == 0) {
- dev->mem->base_address =
- memory.regions[idx].userspace_addr;
- dev->mem->mapped_address =
- pregion->address_offset;
- }
-
- LOG_DEBUG(VHOST_CONFIG,
- "REGION: %u GPA: %p QEMU VA: %p SIZE (%"PRIu64")\n",
- idx,
- (void *)(uintptr_t)pregion->guest_phys_address,
- (void *)(uintptr_t)pregion->userspace_address,
- pregion->memory_size);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "guest memory region %u, size: 0x%" PRIx64 "\n"
+ "\t guest physical addr: 0x%" PRIx64 "\n"
+ "\t guest virtual addr: 0x%" PRIx64 "\n"
+ "\t host virtual addr: 0x%" PRIx64 "\n"
+ "\t mmap addr : 0x%" PRIx64 "\n"
+ "\t mmap size : 0x%" PRIx64 "\n"
+ "\t mmap align: 0x%" PRIx64 "\n"
+ "\t mmap off : 0x%" PRIx64 "\n",
+ i, reg->size,
+ reg->guest_phys_addr,
+ reg->guest_user_addr,
+ reg->host_user_addr,
+ (uint64_t)(uintptr_t)mmap_addr,
+ mmap_size,
+ alignment,
+ mmap_offset);
}
+ dump_guest_pages(dev);
+
return 0;
err_mmap:
- while (idx--) {
- munmap((void *)(uintptr_t)pregion_orig[idx].mapped_address,
- pregion_orig[idx].mapped_size);
- close(pregion_orig[idx].fd);
- }
- free(dev->mem);
+ free_mem_region(dev);
+ rte_free(dev->mem);
dev->mem = NULL;
return -1;
}
static int
vq_is_ready(struct vhost_virtqueue *vq)
{
- return vq && vq->desc &&
+ return vq && vq->desc && vq->avail && vq->used &&
vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
}
static int
virtio_is_ready(struct virtio_net *dev)
{
- struct vhost_virtqueue *rvq, *tvq;
+ struct vhost_virtqueue *vq;
uint32_t i;
- for (i = 0; i < dev->virt_qp_nb; i++) {
- rvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ];
- tvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ];
+ if (dev->nr_vring == 0)
+ return 0;
- if (!vq_is_ready(rvq) || !vq_is_ready(tvq)) {
- RTE_LOG(INFO, VHOST_CONFIG,
- "virtio is not ready for processing.\n");
+ for (i = 0; i < dev->nr_vring; i++) {
+ vq = dev->virtqueue[i];
+
+ if (!vq_is_ready(vq))
return 0;
- }
}
RTE_LOG(INFO, VHOST_CONFIG,
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- uint32_t cur_qp_idx;
file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
- /*
- * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
- * we get, so we do vring queue pair allocation here.
- */
- cur_qp_idx = file.index / VIRTIO_QNUM;
- if (cur_qp_idx + 1 > dev->virt_qp_nb) {
- if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
- return;
- }
-
vq = dev->virtqueue[file.index];
- assert(vq != NULL);
-
if (vq->callfd >= 0)
close(vq->callfd);
vq->callfd = file.fd;
}
-/*
- * In vhost-user, when we receive kick message, will test whether virtio
- * device is ready for packet processing.
- */
static void
-vhost_user_set_vring_kick(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
+ struct virtio_net *dev = *pdev;
file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
+ /* Interpret ring addresses only when ring is started. */
+ dev = translate_ring_addresses(dev, file.index);
+ if (!dev)
+ return;
+
+ *pdev = dev;
+
vq = dev->virtqueue[file.index];
+
+ /*
+ * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
+ * the ring starts already enabled. Otherwise, it is enabled via
+ * the SET_VRING_ENABLE message.
+ */
+ if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
+ vq->enabled = 1;
+
if (vq->kickfd >= 0)
close(vq->kickfd);
vq->kickfd = file.fd;
+}
+
+static void
+free_zmbufs(struct vhost_virtqueue *vq)
+{
+ struct zcopy_mbuf *zmbuf, *next;
- if (virtio_is_ready(dev) && !(dev->flags & VIRTIO_DEV_RUNNING)) {
- if (notify_ops->new_device(dev->vid) == 0)
- dev->flags |= VIRTIO_DEV_RUNNING;
+ for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
+ zmbuf != NULL; zmbuf = next) {
+ next = TAILQ_NEXT(zmbuf, next);
+
+ rte_pktmbuf_free(zmbuf->mbuf);
+ TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
}
+
+ rte_free(vq->zmbufs);
}
/*
*/
static int
vhost_user_get_vring_base(struct virtio_net *dev,
- struct vhost_vring_state *state)
+ VhostUserMsg *msg)
{
+ struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
+
/* We have to stop the queue (virtio) if it is running. */
if (dev->flags & VIRTIO_DEV_RUNNING) {
dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
+ dev->notify_ops->destroy_device(dev->vid);
}
+ dev->flags &= ~VIRTIO_DEV_READY;
+
/* Here we are safe to get the last used index */
- state->num = dev->virtqueue[state->index]->last_used_idx;
+ msg->payload.state.num = vq->last_used_idx;
RTE_LOG(INFO, VHOST_CONFIG,
- "vring base idx:%d file:%d\n", state->index, state->num);
+ "vring base idx:%d file:%d\n", msg->payload.state.index,
+ msg->payload.state.num);
/*
* Based on current qemu vhost-user implementation, this message is
* sent and only sent in vhost_vring_stop.
* TODO: cleanup the vring, it isn't usable since here.
*/
- if (dev->virtqueue[state->index]->kickfd >= 0)
- close(dev->virtqueue[state->index]->kickfd);
+ if (vq->kickfd >= 0)
+ close(vq->kickfd);
+
+ vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
+
+ if (dev->dequeue_zero_copy)
+ free_zmbufs(vq);
+ rte_free(vq->shadow_used_ring);
+ vq->shadow_used_ring = NULL;
- dev->virtqueue[state->index]->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
+ rte_free(vq->batch_copy_elems);
+ vq->batch_copy_elems = NULL;
return 0;
}
*/
static int
vhost_user_set_vring_enable(struct virtio_net *dev,
- struct vhost_vring_state *state)
+ VhostUserMsg *msg)
{
- int enable = (int)state->num;
+ int enable = (int)msg->payload.state.num;
RTE_LOG(INFO, VHOST_CONFIG,
"set queue enable: %d to qp idx: %d\n",
- enable, state->index);
+ enable, msg->payload.state.index);
- if (notify_ops->vring_state_changed)
- notify_ops->vring_state_changed(dev->vid, state->index, enable);
+ if (dev->notify_ops->vring_state_changed)
+ dev->notify_ops->vring_state_changed(dev->vid,
+ msg->payload.state.index, enable);
- dev->virtqueue[state->index]->enabled = enable;
+ dev->virtqueue[msg->payload.state.index]->enabled = enable;
return 0;
}
+static void
+vhost_user_get_protocol_features(struct virtio_net *dev,
+ struct VhostUserMsg *msg)
+{
+ uint64_t features, protocol_features = VHOST_USER_PROTOCOL_FEATURES;
+
+ rte_vhost_driver_get_features(dev->ifname, &features);
+
+ /*
+ * REPLY_ACK protocol feature is only mandatory for now
+ * for IOMMU feature. If IOMMU is explicitly disabled by the
+ * application, disable also REPLY_ACK feature for older buggy
+ * Qemu versions (from v2.7.0 to v2.9.0).
+ */
+ if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
+ protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK);
+
+ msg->payload.u64 = protocol_features;
+ msg->size = sizeof(msg->payload.u64);
+}
+
static void
vhost_user_set_protocol_features(struct virtio_net *dev,
uint64_t protocol_features)
return 0;
}
+static int
+vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
+{
+ if (msg->payload.u64 < VIRTIO_MIN_MTU ||
+ msg->payload.u64 > VIRTIO_MAX_MTU) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
+ msg->payload.u64);
+
+ return -1;
+ }
+
+ dev->mtu = msg->payload.u64;
+
+ return 0;
+}
+
+static int
+vhost_user_set_req_fd(struct virtio_net *dev, struct VhostUserMsg *msg)
+{
+ int fd = msg->fds[0];
+
+ if (fd < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Invalid file descriptor for slave channel (%d)\n",
+ fd);
+ return -1;
+ }
+
+ dev->slave_req_fd = fd;
+
+ return 0;
+}
+
+static int
+is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
+{
+ struct vhost_vring_addr *ra;
+ uint64_t start, end;
+
+ start = imsg->iova;
+ end = start + imsg->size;
+
+ ra = &vq->ring_addrs;
+ if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
+ return 1;
+ if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
+ return 1;
+ if (ra->used_user_addr >= start && ra->used_user_addr < end)
+ return 1;
+
+ return 0;
+}
+
+static int
+is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
+ struct vhost_iotlb_msg *imsg)
+{
+ uint64_t istart, iend, vstart, vend;
+
+ istart = imsg->iova;
+ iend = istart + imsg->size - 1;
+
+ vstart = (uintptr_t)vq->desc;
+ vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->avail;
+ vend = vstart + sizeof(struct vring_avail);
+ vend += sizeof(uint16_t) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->used;
+ vend = vstart + sizeof(struct vring_used);
+ vend += sizeof(struct vring_used_elem) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ return 0;
+}
+
+static int
+vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg)
+{
+ struct virtio_net *dev = *pdev;
+ struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
+ uint16_t i;
+ uint64_t vva;
+
+ switch (imsg->type) {
+ case VHOST_IOTLB_UPDATE:
+ vva = qva_to_vva(dev, imsg->uaddr);
+ if (!vva)
+ return -1;
+
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
+ imsg->size, imsg->perm);
+
+ if (is_vring_iotlb_update(vq, imsg))
+ *pdev = dev = translate_ring_addresses(dev, i);
+ }
+ break;
+ case VHOST_IOTLB_INVALIDATE:
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_remove(vq, imsg->iova,
+ imsg->size);
+
+ if (is_vring_iotlb_invalidate(vq, imsg))
+ vring_invalidate(dev, vq);
+ }
+ break;
+ default:
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
+ imsg->type);
+ return -1;
+ }
+
+ return 0;
+}
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
static int
send_vhost_message(int sockfd, struct VhostUserMsg *msg)
{
- int ret;
+ if (!msg)
+ return 0;
+
+ return send_fd_message(sockfd, (char *)msg,
+ VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
+}
+static int
+send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
+{
if (!msg)
return 0;
msg->flags &= ~VHOST_USER_VERSION_MASK;
+ msg->flags &= ~VHOST_USER_NEED_REPLY;
msg->flags |= VHOST_USER_VERSION;
msg->flags |= VHOST_USER_REPLY_MASK;
- ret = send_fd_message(sockfd, (char *)msg,
- VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
+ return send_vhost_message(sockfd, msg);
+}
- return ret;
+/*
+ * Allocate a queue pair if it hasn't been allocated yet
+ */
+static int
+vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, VhostUserMsg *msg)
+{
+ uint16_t vring_idx;
+
+ switch (msg->request.master) {
+ case VHOST_USER_SET_VRING_KICK:
+ case VHOST_USER_SET_VRING_CALL:
+ case VHOST_USER_SET_VRING_ERR:
+ vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ break;
+ case VHOST_USER_SET_VRING_NUM:
+ case VHOST_USER_SET_VRING_BASE:
+ case VHOST_USER_SET_VRING_ENABLE:
+ vring_idx = msg->payload.state.index;
+ break;
+ case VHOST_USER_SET_VRING_ADDR:
+ vring_idx = msg->payload.addr.index;
+ break;
+ default:
+ return 0;
+ }
+
+ if (vring_idx >= VHOST_MAX_VRING) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "invalid vring index: %u\n", vring_idx);
+ return -1;
+ }
+
+ if (dev->virtqueue[vring_idx])
+ return 0;
+
+ return alloc_vring_queue(dev, vring_idx);
}
int
if (dev == NULL)
return -1;
+ if (!dev->notify_ops) {
+ dev->notify_ops = vhost_driver_callback_get(dev->ifname);
+ if (!dev->notify_ops) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to get callback ops for driver %s\n",
+ dev->ifname);
+ return -1;
+ }
+ }
+
ret = read_vhost_message(fd, &msg);
- if (ret <= 0 || msg.request >= VHOST_USER_MAX) {
+ if (ret <= 0 || msg.request.master >= VHOST_USER_MAX) {
if (ret < 0)
RTE_LOG(ERR, VHOST_CONFIG,
"vhost read message failed\n");
return -1;
}
- RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
- vhost_message_str[msg.request]);
- switch (msg.request) {
+ ret = 0;
+ if (msg.request.master != VHOST_USER_IOTLB_MSG)
+ RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
+ vhost_message_str[msg.request.master]);
+ else
+ RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
+ vhost_message_str[msg.request.master]);
+
+ ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to alloc queue\n");
+ return -1;
+ }
+
+ switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features();
+ msg.payload.u64 = vhost_user_get_features(dev);
msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
+ send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
vhost_user_set_features(dev, msg.payload.u64);
break;
case VHOST_USER_GET_PROTOCOL_FEATURES:
- msg.payload.u64 = VHOST_USER_PROTOCOL_FEATURES;
- msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
+ vhost_user_get_protocol_features(dev, &msg);
+ send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_PROTOCOL_FEATURES:
vhost_user_set_protocol_features(dev, msg.payload.u64);
break;
case VHOST_USER_SET_MEM_TABLE:
- vhost_user_set_mem_table(dev, &msg);
+ ret = vhost_user_set_mem_table(dev, &msg);
break;
case VHOST_USER_SET_LOG_BASE:
/* it needs a reply */
msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
+ send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
close(msg.fds[0]);
break;
case VHOST_USER_SET_VRING_NUM:
- vhost_user_set_vring_num(dev, &msg.payload.state);
+ vhost_user_set_vring_num(dev, &msg);
break;
case VHOST_USER_SET_VRING_ADDR:
- vhost_user_set_vring_addr(dev, &msg.payload.addr);
+ vhost_user_set_vring_addr(&dev, &msg);
break;
case VHOST_USER_SET_VRING_BASE:
- vhost_user_set_vring_base(dev, &msg.payload.state);
+ vhost_user_set_vring_base(dev, &msg);
break;
case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(dev, &msg.payload.state);
+ vhost_user_get_vring_base(dev, &msg);
msg.size = sizeof(msg.payload.state);
- send_vhost_message(fd, &msg);
+ send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_VRING_KICK:
- vhost_user_set_vring_kick(dev, &msg);
+ vhost_user_set_vring_kick(&dev, &msg);
break;
case VHOST_USER_SET_VRING_CALL:
vhost_user_set_vring_call(dev, &msg);
case VHOST_USER_GET_QUEUE_NUM:
msg.payload.u64 = VHOST_MAX_QUEUE_PAIRS;
msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
+ send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_VRING_ENABLE:
- vhost_user_set_vring_enable(dev, &msg.payload.state);
+ vhost_user_set_vring_enable(dev, &msg);
break;
case VHOST_USER_SEND_RARP:
vhost_user_send_rarp(dev, &msg);
break;
+ case VHOST_USER_NET_SET_MTU:
+ ret = vhost_user_net_set_mtu(dev, &msg);
+ break;
+
+ case VHOST_USER_SET_SLAVE_REQ_FD:
+ ret = vhost_user_set_req_fd(dev, &msg);
+ break;
+
+ case VHOST_USER_IOTLB_MSG:
+ ret = vhost_user_iotlb_msg(&dev, &msg);
+ break;
+
default:
+ ret = -1;
break;
}
+ if (msg.flags & VHOST_USER_NEED_REPLY) {
+ msg.payload.u64 = !!ret;
+ msg.size = sizeof(msg.payload.u64);
+ send_vhost_reply(fd, &msg);
+ }
+
+ if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
+ dev->flags |= VIRTIO_DEV_READY;
+
+ if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
+ if (dev->dequeue_zero_copy) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "dequeue zero copy is enabled\n");
+ }
+
+ if (dev->notify_ops->new_device(dev->vid) == 0)
+ dev->flags |= VIRTIO_DEV_RUNNING;
+ }
+ }
+
+ return 0;
+}
+
+int
+vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
+{
+ int ret;
+ struct VhostUserMsg msg = {
+ .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
+ .flags = VHOST_USER_VERSION,
+ .size = sizeof(msg.payload.iotlb),
+ .payload.iotlb = {
+ .iova = iova,
+ .perm = perm,
+ .type = VHOST_IOTLB_MISS,
+ },
+ };
+
+ ret = send_vhost_message(dev->slave_req_fd, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to send IOTLB miss message (%d)\n",
+ ret);
+ return ret;
+ }
+
return 0;
}
git.droids-corp.org / dpdk.git / blobdiff