Ping
> ----------------------------------------------------------------------
> This patch introduces new function to get rss device config and adds code to
> forward the RSS control command to backend through hw control queue if
> RSS feature is negotiated.
> This patch will help to negotiate VIRTIO_NET_F_RSS feature if vhost-vdpa
> backend supports RSS in HW.
>
> Signed-off-by: Srujana Challa <scha...@marvell.com>
> ---
> .../net/virtio/virtio_user/virtio_user_dev.c | 31 ++++++++++++++++++-
> .../net/virtio/virtio_user/virtio_user_dev.h | 2 ++
> drivers/net/virtio/virtio_user_ethdev.c | 3 ++
> 3 files changed, 35 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 578877d089..b0937c9df9 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -304,6 +304,24 @@ virtio_user_dev_init_max_queue_pairs(struct
> virtio_user_dev *dev, uint32_t user_
> return 0;
> }
>
> +int
> +virtio_user_dev_get_rss_config(struct virtio_user_dev *dev, void *dst,
> +size_t offset, int length) {
> + int ret = 0;
> +
> + if (!(dev->device_features & (1ULL << VIRTIO_NET_F_RSS)))
> + return -ENOTSUP;
> +
> + if (!dev->ops->get_config)
> + return -ENOTSUP;
> +
> + ret = dev->ops->get_config(dev, dst, offset, length);
> + if (ret)
> + PMD_DRV_LOG(ERR, "(%s) Failed to get rss config in device",
> +dev->path);
> +
> + return ret;
> +}
> +
> int
> virtio_user_dev_set_mac(struct virtio_user_dev *dev) { @@ -687,7 +705,8
> @@ virtio_user_free_vrings(struct virtio_user_dev *dev)
> 1ULL << VIRTIO_F_IN_ORDER | \
> 1ULL << VIRTIO_F_VERSION_1 | \
> 1ULL << VIRTIO_F_RING_PACKED | \
> - 1ULL << VIRTIO_F_NOTIFICATION_DATA)
> + 1ULL << VIRTIO_F_NOTIFICATION_DATA | \
> + 1ULL << VIRTIO_NET_F_RSS)
>
> int
> virtio_user_dev_init(struct virtio_user_dev *dev, char *path, uint16_t
> queues, @@ -903,6 +922,11 @@ virtio_user_handle_ctrl_msg_split(struct
> virtio_user_dev *dev, struct vring *vri
>
> queues = *(uint16_t *)(uintptr_t)vring->desc[idx_data].addr;
> status = virtio_user_handle_mq(dev, queues);
> + } else if (hdr->class == VIRTIO_NET_CTRL_MQ && hdr->cmd ==
> VIRTIO_NET_CTRL_MQ_RSS_CONFIG) {
> + struct virtio_net_ctrl_rss *rss;
> +
> + rss = (struct virtio_net_ctrl_rss *)(uintptr_t)vring-
> >desc[idx_data].addr;
> + status = virtio_user_handle_mq(dev, rss->max_tx_vq);
> } else if (hdr->class == VIRTIO_NET_CTRL_RX ||
> hdr->class == VIRTIO_NET_CTRL_MAC ||
> hdr->class == VIRTIO_NET_CTRL_VLAN) { @@ -964,6
> +988,11 @@ virtio_user_handle_ctrl_msg_packed(struct virtio_user_dev
> *dev,
> queues = *(uint16_t *)(uintptr_t)
> vring->desc[idx_data].addr;
> status = virtio_user_handle_mq(dev, queues);
> + } else if (hdr->class == VIRTIO_NET_CTRL_MQ && hdr->cmd ==
> VIRTIO_NET_CTRL_MQ_RSS_CONFIG) {
> + struct virtio_net_ctrl_rss *rss;
> +
> + rss = (struct virtio_net_ctrl_rss *)(uintptr_t)vring-
> >desc[idx_data].addr;
> + status = virtio_user_handle_mq(dev, rss->max_tx_vq);
> } else if (hdr->class == VIRTIO_NET_CTRL_RX ||
> hdr->class == VIRTIO_NET_CTRL_MAC ||
> hdr->class == VIRTIO_NET_CTRL_VLAN) { diff --git
> a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> index 29ec386da5..39b3eec0f2 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -86,6 +86,8 @@ int virtio_user_dev_update_status(struct
> virtio_user_dev *dev); int virtio_user_dev_update_link_state(struct
> virtio_user_dev *dev); int virtio_user_dev_set_mac(struct virtio_user_dev
> *dev); int virtio_user_dev_get_mac(struct virtio_user_dev *dev);
> +int virtio_user_dev_get_rss_config(struct virtio_user_dev *dev, void *dst,
> size_t offset,
> + int length);
> void virtio_user_dev_delayed_disconnect_handler(void *param); int
> virtio_user_dev_server_reconnect(struct virtio_user_dev *dev); extern const
> char * const virtio_user_backend_strings[]; diff --git
> a/drivers/net/virtio/virtio_user_ethdev.c
> b/drivers/net/virtio/virtio_user_ethdev.c
> index 241465ecdd..6c10e8f6c0 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -52,6 +52,9 @@ virtio_user_read_dev_config(struct virtio_hw *hw,
> size_t offset,
>
> if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
> *(uint16_t *)dst = dev->max_queue_pairs;
> +
> + if (offset >= offsetof(struct virtio_net_config, rss_max_key_size))
> + virtio_user_dev_get_rss_config(dev, dst, offset, length);
> }
>
> static void
> --
> 2.25.1
