[dpdk-dev] [PATCH v2 42/44] net/virtio: move Vhost-vDPA data to its backend
Xia, Chenbo
chenbo.xia at intel.com
Fri Jan 22 10:06:57 CET 2021
Hi Maxime,
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin at redhat.com>
> Sent: Wednesday, January 20, 2021 5:25 AM
> To: dev at dpdk.org; Xia, Chenbo <chenbo.xia at intel.com>; olivier.matz at 6wind.com;
> amorenoz at redhat.com; david.marchand at redhat.com
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>
> Subject: [PATCH v2 42/44] net/virtio: move Vhost-vDPA data to its backend
>
> As done earlier for Vhost-user and Vhost-kernel, this
> patch moves the Vhost-vDPA specific data to its backend
> file.
>
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
> drivers/net/virtio/virtio_user/vhost_vdpa.c | 120 +++++++++++++-----
> .../net/virtio/virtio_user/virtio_user_dev.h | 4 -
> 2 files changed, 89 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_user/vhost_vdpa.c
> b/drivers/net/virtio/virtio_user/vhost_vdpa.c
> index 5e3778b682..e2d6d3504d 100644
> --- a/drivers/net/virtio/virtio_user/vhost_vdpa.c
> +++ b/drivers/net/virtio/virtio_user/vhost_vdpa.c
> @@ -13,6 +13,11 @@
> #include "vhost.h"
> #include "virtio_user_dev.h"
>
> +struct vhost_vdpa_data {
> + int vhostfd;
> + uint64_t protocol_features;
> +};
> +
> #define VHOST_VDPA_SUPPORTED_BACKEND_FEATURES \
> (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | \
> 1ULL << VHOST_BACKEND_F_IOTLB_BATCH)
> @@ -88,27 +93,34 @@ vhost_vdpa_ioctl(int fd, uint64_t request, void *arg)
> static int
> vhost_vdpa_set_owner(struct virtio_user_dev *dev)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_OWNER, NULL);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_OWNER, NULL);
> }
>
> static int
> vhost_vdpa_get_protocol_features(struct virtio_user_dev *dev, uint64_t
> *features)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_GET_BACKEND_FEATURES,
> features);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_BACKEND_FEATURES,
> features);
> }
>
> static int
> vhost_vdpa_set_protocol_features(struct virtio_user_dev *dev, uint64_t
> features)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_BACKEND_FEATURES,
> &features);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_BACKEND_FEATURES,
> &features);
> }
>
> static int
> vhost_vdpa_get_features(struct virtio_user_dev *dev, uint64_t *features)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> int ret;
>
> - ret = vhost_vdpa_ioctl(dev->vhostfd, VHOST_GET_FEATURES, features);
> + ret = vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_FEATURES, features);
> if (ret) {
> PMD_DRV_LOG(ERR, "Failed to get features");
> return -1;
> @@ -118,15 +130,15 @@ vhost_vdpa_get_features(struct virtio_user_dev *dev,
> uint64_t *features)
> *features &= ~(1ULL << VIRTIO_NET_F_MQ);
>
> /* Negotiated vDPA backend features */
> - ret = vhost_vdpa_get_protocol_features(dev, &dev->protocol_features);
> + ret = vhost_vdpa_get_protocol_features(dev, &data->protocol_features);
> if (ret < 0) {
> PMD_DRV_LOG(ERR, "Failed to get backend features");
> return -1;
> }
>
> - dev->protocol_features &= VHOST_VDPA_SUPPORTED_BACKEND_FEATURES;
> + data->protocol_features &= VHOST_VDPA_SUPPORTED_BACKEND_FEATURES;
>
> - ret = vhost_vdpa_set_protocol_features(dev, dev->protocol_features);
> + ret = vhost_vdpa_set_protocol_features(dev, data->protocol_features);
> if (ret < 0) {
> PMD_DRV_LOG(ERR, "Failed to set backend features");
> return -1;
> @@ -138,21 +150,24 @@ vhost_vdpa_get_features(struct virtio_user_dev *dev,
> uint64_t *features)
> static int
> vhost_vdpa_set_features(struct virtio_user_dev *dev, uint64_t features)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> /* WORKAROUND */
> features |= 1ULL << VIRTIO_F_IOMMU_PLATFORM;
>
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_FEATURES, &features);
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_FEATURES, &features);
> }
>
> static int
> vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev *dev)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> struct vhost_msg msg = {};
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
> return 0;
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
> return -1;
> }
> @@ -160,7 +175,7 @@ vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev *dev)
> msg.type = VHOST_IOTLB_MSG_V2;
> msg.iotlb.type = VHOST_IOTLB_BATCH_BEGIN;
>
> - if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> + if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> PMD_DRV_LOG(ERR, "Failed to send IOTLB batch begin (%s)",
> strerror(errno));
> return -1;
> @@ -172,12 +187,13 @@ vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev *dev)
> static int
> vhost_vdpa_iotlb_batch_end(struct virtio_user_dev *dev)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> struct vhost_msg msg = {};
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
> return 0;
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
> return -1;
> }
> @@ -185,7 +201,7 @@ vhost_vdpa_iotlb_batch_end(struct virtio_user_dev *dev)
> msg.type = VHOST_IOTLB_MSG_V2;
> msg.iotlb.type = VHOST_IOTLB_BATCH_END;
>
> - if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> + if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> PMD_DRV_LOG(ERR, "Failed to send IOTLB batch end (%s)",
> strerror(errno));
> return -1;
> @@ -198,9 +214,10 @@ static int
> vhost_vdpa_dma_map(struct virtio_user_dev *dev, void *addr,
> uint64_t iova, size_t len)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> struct vhost_msg msg = {};
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
> return -1;
> }
> @@ -215,7 +232,7 @@ vhost_vdpa_dma_map(struct virtio_user_dev *dev, void *addr,
> PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", addr: %p, len: 0x%zx",
> __func__, iova, addr, len);
>
> - if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> + if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> PMD_DRV_LOG(ERR, "Failed to send IOTLB update (%s)",
> strerror(errno));
> return -1;
> @@ -228,9 +245,10 @@ static int
> vhost_vdpa_dma_unmap(struct virtio_user_dev *dev, __rte_unused void *addr,
> uint64_t iova, size_t len)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> struct vhost_msg msg = {};
>
> - if (!(dev->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> + if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)))
> {
> PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
> return -1;
> }
> @@ -243,7 +261,7 @@ vhost_vdpa_dma_unmap(struct virtio_user_dev *dev,
> __rte_unused void *addr,
> PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", len: 0x%zx",
> __func__, iova, len);
>
> - if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> + if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
> PMD_DRV_LOG(ERR, "Failed to send IOTLB invalidate (%s)",
> strerror(errno));
> return -1;
> @@ -353,55 +371,73 @@ vhost_vdpa_set_memory_table(struct virtio_user_dev *dev)
> static int
> vhost_vdpa_set_vring_enable(struct virtio_user_dev *dev, struct
> vhost_vring_state *state)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_VDPA_SET_VRING_ENABLE,
> state);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_SET_VRING_ENABLE,
> state);
> }
>
> static int
> vhost_vdpa_set_vring_num(struct virtio_user_dev *dev, struct
> vhost_vring_state *state)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_VRING_NUM, state);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_NUM, state);
> }
>
> static int
> vhost_vdpa_set_vring_base(struct virtio_user_dev *dev, struct
> vhost_vring_state *state)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_VRING_BASE, state);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_BASE, state);
> }
>
> static int
> vhost_vdpa_get_vring_base(struct virtio_user_dev *dev, struct
> vhost_vring_state *state)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_GET_VRING_BASE, state);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_VRING_BASE, state);
> }
>
> static int
> vhost_vdpa_set_vring_call(struct virtio_user_dev *dev, struct
> vhost_vring_file *file)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_VRING_CALL, file);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_CALL, file);
> }
>
> static int
> vhost_vdpa_set_vring_kick(struct virtio_user_dev *dev, struct
> vhost_vring_file *file)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_VRING_KICK, file);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_KICK, file);
> }
>
> static int
> vhost_vdpa_set_vring_addr(struct virtio_user_dev *dev, struct
> vhost_vring_addr *addr)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_SET_VRING_ADDR, addr);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_ADDR, addr);
> }
>
> static int
> vhost_vdpa_get_status(struct virtio_user_dev *dev, uint8_t *status)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_VDPA_GET_STATUS, status);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_GET_STATUS, status);
> }
>
> static int
> vhost_vdpa_set_status(struct virtio_user_dev *dev, uint8_t status)
> {
> - return vhost_vdpa_ioctl(dev->vhostfd, VHOST_VDPA_SET_STATUS, &status);
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_SET_STATUS, &status);
> }
>
> /**
> @@ -414,27 +450,49 @@ vhost_vdpa_set_status(struct virtio_user_dev *dev,
> uint8_t status)
> static int
> vhost_vdpa_setup(struct virtio_user_dev *dev)
> {
> + struct vhost_vdpa_data *data;
> uint32_t did = (uint32_t)-1;
>
> - dev->vhostfd = open(dev->path, O_RDWR);
> - if (dev->vhostfd < 0) {
> + data = malloc(sizeof(*data));
> + if (!data) {
> + PMD_DRV_LOG(ERR, "(%s) Faidle to allocate backend data", dev-
> >path);
> + return -1;
> + }
> +
> + data->vhostfd = open(dev->path, O_RDWR);
> + if (data->vhostfd < 0) {
> PMD_DRV_LOG(ERR, "Failed to open %s: %s\n",
> dev->path, strerror(errno));
> + free(data);
> return -1;
> }
>
> - if (ioctl(dev->vhostfd, VHOST_VDPA_GET_DEVICE_ID, &did) < 0 ||
> + if (ioctl(data->vhostfd, VHOST_VDPA_GET_DEVICE_ID, &did) < 0 ||
> did != VIRTIO_ID_NETWORK) {
> PMD_DRV_LOG(ERR, "Invalid vdpa device ID: %u\n", did);
> + close(data->vhostfd);
> + free(data);
> return -1;
> }
>
> + dev->backend_data = data;
> +
> return 0;
> }
>
> static int
> -vhost_vdpa_destroy(struct virtio_user_dev *dev __rte_unused)
> +vhost_vdpa_destroy(struct virtio_user_dev *dev)
> {
> + struct vhost_vdpa_data *data = dev->backend_data;
> +
> + if (!data)
> + return 0;
> +
> + close(data->vhostfd);
> +
> + free(data);
> + dev->backend_data = NULL;
> +
> return 0;
> }
>
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> index 36a9cadcad..9a6723da24 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -29,9 +29,6 @@ struct virtio_user_dev {
> enum virtio_user_backend_type backend_type;
> bool is_server; /* server or client mode */
>
> - /* for vhost_vdpa backend */
> - int vhostfd;
> -
> /* for both vhost_user and vhost_kernel */
I remember you agreed that this comment is no longer needed?
I also noticed that there're multiple calls of PMD_DRV_LOG that add
'\n' in the end, which is necessary. But, let's clean it up later..
With above fixed:
Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>
> int callfds[VIRTIO_MAX_VIRTQUEUES];
> int kickfds[VIRTIO_MAX_VIRTQUEUES];
> @@ -45,7 +42,6 @@ struct virtio_user_dev {
> uint64_t device_features; /* supported features by device */
> uint64_t frontend_features; /* enabled frontend features */
> uint64_t unsupported_features; /* unsupported features mask */
> - uint64_t protocol_features; /* negotiated protocol features */
> uint8_t status;
> uint16_t net_status;
> uint16_t port_id;
> --
> 2.29.2
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