#define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file)
#define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file)
+/* with below features, vhost kernel does not need to do the checksum and TSO,
+ * these info will be passed to virtio_user through virtio net header.
+ */
+#define VHOST_KERNEL_GUEST_OFFLOADS_MASK \
+ ((1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
+ (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
+ (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
+ (1ULL << VIRTIO_NET_F_GUEST_ECN) | \
+ (1ULL << VIRTIO_NET_F_GUEST_UFO))
+
+/* with below features, when flows from virtio_user to vhost kernel
+ * (1) if flows goes up through the kernel networking stack, it does not need
+ * to verify checksum, which can save CPU cycles;
+ * (2) if flows goes through a Linux bridge and outside from an interface
+ * (kernel driver), checksum and TSO will be done by GSO in kernel or even
+ * offloaded into real physical device.
+ */
+#define VHOST_KERNEL_HOST_OFFLOADS_MASK \
+ ((1ULL << VIRTIO_NET_F_HOST_TSO4) | \
+ (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
+ (1ULL << VIRTIO_NET_F_CSUM))
+
static uint64_t max_regions = 64;
static void
return vhost_kernel_ioctl(dev->vhostfds[0], VHOST_SET_OWNER, NULL);
}
+static int
+vhost_kernel_get_features(struct virtio_user_dev *dev, uint64_t *features)
+{
+ int ret;
+ unsigned int tap_features;
+
+ ret = vhost_kernel_ioctl(dev->vhostfds[0], VHOST_GET_FEATURES, features);
+ if (ret < 0) {
+ PMD_DRV_LOG(ERR, "Failed to get features");
+ return -1;
+ }
+
+ ret = tap_support_features(&tap_features);
+ if (ret < 0) {
+ PMD_DRV_LOG(ERR, "Failed to get TAP features");
+ return -1;
+ }
+
+ /* with tap as the backend, all these features are supported
+ * but not claimed by vhost-net, so we add them back when
+ * reporting to upper layer.
+ */
+ if (tap_features & IFF_VNET_HDR) {
+ *features |= VHOST_KERNEL_GUEST_OFFLOADS_MASK;
+ *features |= VHOST_KERNEL_HOST_OFFLOADS_MASK;
+ }
+
+ /* vhost_kernel will not declare this feature, but it does
+ * support multi-queue.
+ */
+ if (tap_features & IFF_MULTI_QUEUE)
+ *features |= (1ull << VIRTIO_NET_F_MQ);
+
+ return 0;
+}
+
+static int
+vhost_kernel_set_features(struct virtio_user_dev *dev, uint64_t features)
+{
+ /* We don't need memory protection here */
+ features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
+ /* VHOST kernel does not know about below flags */
+ features &= ~VHOST_KERNEL_GUEST_OFFLOADS_MASK;
+ features &= ~VHOST_KERNEL_HOST_OFFLOADS_MASK;
+ features &= ~(1ULL << VIRTIO_NET_F_MQ);
+
+ return vhost_kernel_ioctl(dev->vhostfds[0], VHOST_SET_FEATURES, &features);
+}
+
static uint64_t vhost_req_user_to_kernel[] = {
[VHOST_USER_RESET_OWNER] = VHOST_RESET_OWNER,
- [VHOST_USER_SET_FEATURES] = VHOST_SET_FEATURES,
- [VHOST_USER_GET_FEATURES] = VHOST_GET_FEATURES,
[VHOST_USER_SET_VRING_CALL] = VHOST_SET_VRING_CALL,
[VHOST_USER_SET_VRING_NUM] = VHOST_SET_VRING_NUM,
[VHOST_USER_SET_VRING_BASE] = VHOST_SET_VRING_BASE,
return vm;
}
-/* with below features, vhost kernel does not need to do the checksum and TSO,
- * these info will be passed to virtio_user through virtio net header.
- */
-#define VHOST_KERNEL_GUEST_OFFLOADS_MASK \
- ((1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
- (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
- (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
- (1ULL << VIRTIO_NET_F_GUEST_ECN) | \
- (1ULL << VIRTIO_NET_F_GUEST_UFO))
-
-/* with below features, when flows from virtio_user to vhost kernel
- * (1) if flows goes up through the kernel networking stack, it does not need
- * to verify checksum, which can save CPU cycles;
- * (2) if flows goes through a Linux bridge and outside from an interface
- * (kernel driver), checksum and TSO will be done by GSO in kernel or even
- * offloaded into real physical device.
- */
-#define VHOST_KERNEL_HOST_OFFLOADS_MASK \
- ((1ULL << VIRTIO_NET_F_HOST_TSO4) | \
- (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
- (1ULL << VIRTIO_NET_F_CSUM))
-
-static unsigned int
-tap_support_features(void)
-{
- int tapfd;
- unsigned int tap_features;
-
- tapfd = open(PATH_NET_TUN, O_RDWR);
- if (tapfd < 0) {
- PMD_DRV_LOG(ERR, "fail to open %s: %s",
- PATH_NET_TUN, strerror(errno));
- return -1;
- }
-
- if (ioctl(tapfd, TUNGETFEATURES, &tap_features) == -1) {
- PMD_DRV_LOG(ERR, "TUNGETFEATURES failed: %s", strerror(errno));
- close(tapfd);
- return -1;
- }
-
- close(tapfd);
- return tap_features;
-}
-
static int
vhost_kernel_send_request(struct virtio_user_dev *dev,
enum vhost_user_request req,
struct vhost_memory_kernel *vm = NULL;
int vhostfd;
unsigned int queue_sel;
- unsigned int features;
PMD_DRV_LOG(INFO, "%s", vhost_msg_strings[req]);
arg = (void *)vm;
}
- if (req_kernel == VHOST_SET_FEATURES) {
- /* We don't need memory protection here */
- *(uint64_t *)arg &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
-
- /* VHOST kernel does not know about below flags */
- *(uint64_t *)arg &= ~VHOST_KERNEL_GUEST_OFFLOADS_MASK;
- *(uint64_t *)arg &= ~VHOST_KERNEL_HOST_OFFLOADS_MASK;
-
- *(uint64_t *)arg &= ~(1ULL << VIRTIO_NET_F_MQ);
- }
-
switch (req_kernel) {
case VHOST_SET_VRING_NUM:
case VHOST_SET_VRING_ADDR:
ret = ioctl(vhostfd, req_kernel, arg);
}
- if (!ret && req_kernel == VHOST_GET_FEATURES) {
- features = tap_support_features();
- /* with tap as the backend, all these features are supported
- * but not claimed by vhost-net, so we add them back when
- * reporting to upper layer.
- */
- if (features & IFF_VNET_HDR) {
- *((uint64_t *)arg) |= VHOST_KERNEL_GUEST_OFFLOADS_MASK;
- *((uint64_t *)arg) |= VHOST_KERNEL_HOST_OFFLOADS_MASK;
- }
-
- /* vhost_kernel will not declare this feature, but it does
- * support multi-queue.
- */
- if (features & IFF_MULTI_QUEUE)
- *(uint64_t *)arg |= (1ull << VIRTIO_NET_F_MQ);
- }
-
if (vm)
free(vm);
struct virtio_user_backend_ops virtio_ops_kernel = {
.setup = vhost_kernel_setup,
.set_owner = vhost_kernel_set_owner,
+ .get_features = vhost_kernel_get_features,
+ .set_features = vhost_kernel_set_features,
.send_request = vhost_kernel_send_request,
.enable_qp = vhost_kernel_enable_queue_pair
};
return 0;
}
+static int
+vhost_user_get_features(struct virtio_user_dev *dev, uint64_t *features)
+{
+ int ret;
+ struct vhost_user_msg msg = {
+ .request = VHOST_USER_GET_FEATURES,
+ .flags = VHOST_USER_VERSION,
+ };
+
+ ret = vhost_user_write(dev->vhostfd, &msg, NULL, 0);
+ if (ret < 0)
+ goto err;
+
+ ret = vhost_user_read(dev->vhostfd, &msg);
+ if (ret < 0)
+ goto err;
+
+ if (msg.request != VHOST_USER_GET_FEATURES) {
+ PMD_DRV_LOG(ERR, "Unexpected request type (%d)", msg.request);
+ goto err;
+ }
+
+ if (msg.size != sizeof(*features)) {
+ PMD_DRV_LOG(ERR, "Unexpected payload size (%u)", msg.size);
+ goto err;
+ }
+
+ *features = msg.payload.u64;
+
+ return 0;
+err:
+ PMD_DRV_LOG(ERR, "Failed to get backend features");
+
+ return -1;
+}
+
+static int
+vhost_user_set_features(struct virtio_user_dev *dev, uint64_t features)
+{
+ int ret;
+ struct vhost_user_msg msg = {
+ .request = VHOST_USER_SET_FEATURES,
+ .flags = VHOST_USER_VERSION,
+ .size = sizeof(features),
+ .payload.u64 = features,
+ };
+
+ msg.payload.u64 |= dev->device_features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
+
+ ret = vhost_user_write(dev->vhostfd, &msg, NULL, 0);
+ if (ret < 0) {
+ PMD_DRV_LOG(ERR, "Failed to set features");
+ return -1;
+ }
+
+ return 0;
+}
+
struct walk_arg {
struct vhost_memory *vm;
int *fds;
const char * const vhost_msg_strings[] = {
[VHOST_USER_RESET_OWNER] = "VHOST_RESET_OWNER",
- [VHOST_USER_SET_FEATURES] = "VHOST_SET_FEATURES",
- [VHOST_USER_GET_FEATURES] = "VHOST_GET_FEATURES",
[VHOST_USER_SET_VRING_CALL] = "VHOST_SET_VRING_CALL",
[VHOST_USER_SET_VRING_NUM] = "VHOST_SET_VRING_NUM",
[VHOST_USER_SET_VRING_BASE] = "VHOST_SET_VRING_BASE",
(1ULL << VHOST_USER_PROTOCOL_F_STATUS))))
return -ENOTSUP;
/* Fallthrough */
- case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_PROTOCOL_FEATURES:
need_reply = 1;
break;
}
switch (req) {
- case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_STATUS:
case VHOST_USER_GET_PROTOCOL_FEATURES:
if (msg.size != sizeof(m.payload.u64)) {
struct virtio_user_backend_ops virtio_ops_user = {
.setup = vhost_user_setup,
.set_owner = vhost_user_set_owner,
+ .get_features = vhost_user_get_features,
+ .set_features = vhost_user_set_features,
.send_request = vhost_user_sock,
.enable_qp = vhost_user_enable_queue_pair
};
static uint64_t vhost_req_user_to_vdpa[] = {
[VHOST_USER_RESET_OWNER] = VHOST_RESET_OWNER,
- [VHOST_USER_SET_FEATURES] = VHOST_SET_FEATURES,
- [VHOST_USER_GET_FEATURES] = VHOST_GET_FEATURES,
[VHOST_USER_SET_VRING_CALL] = VHOST_SET_VRING_CALL,
[VHOST_USER_SET_VRING_NUM] = VHOST_SET_VRING_NUM,
[VHOST_USER_SET_VRING_BASE] = VHOST_SET_VRING_BASE,
return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_OWNER, NULL);
}
+static int
+vhost_vdpa_get_features(struct virtio_user_dev *dev, uint64_t *features)
+{
+ int ret;
+
+ ret = vhost_vdpa_ioctl(dev->vhostfd, VHOST_GET_FEATURES, features);
+ if (ret) {
+ PMD_DRV_LOG(ERR, "Failed to get features");
+ return -1;
+ }
+
+ /* Multiqueue not supported for now */
+ *features &= ~(1ULL << VIRTIO_NET_F_MQ);
+
+ return 0;
+}
+
+static int
+vhost_vdpa_set_features(struct virtio_user_dev *dev, uint64_t features)
+{
+ /* WORKAROUND */
+ features |= 1ULL << VIRTIO_F_IOMMU_PLATFORM;
+
+ return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_FEATURES, &features);
+}
+
static int
vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev *dev)
{
if (req_vdpa == VHOST_SET_MEM_TABLE)
return vhost_vdpa_dma_map_all(dev);
- if (req_vdpa == VHOST_SET_FEATURES) {
- /* WORKAROUND */
- *(uint64_t *)arg |= 1ULL << VIRTIO_F_IOMMU_PLATFORM;
-
- /* Multiqueue not supported for now */
- *(uint64_t *)arg &= ~(1ULL << VIRTIO_NET_F_MQ);
- }
-
switch (req_vdpa) {
case VHOST_SET_VRING_NUM:
case VHOST_SET_VRING_ADDR:
struct virtio_user_backend_ops virtio_ops_vdpa = {
.setup = vhost_vdpa_setup,
.set_owner = vhost_vdpa_set_owner,
+ .get_features = vhost_vdpa_get_features,
+ .set_features = vhost_vdpa_set_features,
.send_request = vhost_vdpa_send_request,
.enable_qp = vhost_vdpa_enable_queue_pair,
.dma_map = vhost_vdpa_dma_map_batch,
git.droids-corp.org / dpdk.git / commitdiff