Hi Adrian,
> -----Original Message-----
> From: Adrian Moreno <amore...@redhat.com>
> Sent: Thursday, July 16, 2020 1:18 AM
> To: dev@dpdk.org
> Cc: maxime.coque...@redhat.com; Wang, Zhihong <zhihong.w...@intel.com>;
> amore...@redhat.com; Xia, Chenbo <chenbo....@intel.com>
> Subject: [PATCH 3/5] net/virtio: add VIRTIO_SET_STATUS support to Virtio-user
>
> From: Maxime Coquelin <maxime.coque...@redhat.com>
>
> This patch adds support for VHOST_USER_SET_STATUS request. It is used to
> make the backend aware of Virtio devices status update.
>
> It is useful for the backend to know when the Virtio driver is done with the
> Virtio
> device configuration.
>
> Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
> Signed-off-by: Adrian Moreno <amore...@redhat.com>
> ---
> drivers/net/virtio/virtio_user/vhost.h | 6 +++++
> drivers/net/virtio/virtio_user/vhost_user.c | 10 ++++++++
> .../net/virtio/virtio_user/virtio_user_dev.c | 23 ++++++++++++++++++-
> .../net/virtio/virtio_user/virtio_user_dev.h | 1 +
> drivers/net/virtio/virtio_user_ethdev.c | 1 +
> 5 files changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/virtio/virtio_user/vhost.h
> b/drivers/net/virtio/virtio_user/vhost.h
> index 260e1c308..8f49ef457 100644
> --- a/drivers/net/virtio/virtio_user/vhost.h
> +++ b/drivers/net/virtio/virtio_user/vhost.h
> @@ -57,6 +57,10 @@ struct vhost_vring_addr { #define
> VHOST_USER_PROTOCOL_F_REPLY_ACK 3 #endif
>
> +#ifndef VHOST_USER_PROTOCOL_F_STATUS
> +#define VHOST_USER_PROTOCOL_F_STATUS 16 #endif
> +
> enum vhost_user_request {
> VHOST_USER_NONE = 0,
> VHOST_USER_GET_FEATURES = 1,
> @@ -77,6 +81,8 @@ enum vhost_user_request {
> VHOST_USER_SET_PROTOCOL_FEATURES = 16,
> VHOST_USER_GET_QUEUE_NUM = 17,
> VHOST_USER_SET_VRING_ENABLE = 18,
> + VHOST_USER_SET_STATUS = 39,
> + VHOST_USER_GET_STATUS = 40,
> VHOST_USER_MAX
> };
>
> diff --git a/drivers/net/virtio/virtio_user/vhost_user.c
> b/drivers/net/virtio/virtio_user/vhost_user.c
> index 631d0e353..2332e01d1 100644
> --- a/drivers/net/virtio/virtio_user/vhost_user.c
> +++ b/drivers/net/virtio/virtio_user/vhost_user.c
> @@ -244,6 +244,8 @@ const char * const vhost_msg_strings[] = {
> [VHOST_USER_SET_VRING_ENABLE] = "VHOST_SET_VRING_ENABLE",
> [VHOST_USER_GET_PROTOCOL_FEATURES] =
> "VHOST_USER_GET_PROTOCOL_FEATURES",
> [VHOST_USER_SET_PROTOCOL_FEATURES] =
> "VHOST_USER_SET_PROTOCOL_FEATURES",
> + [VHOST_USER_SET_STATUS] = "VHOST_SET_STATUS",
> + [VHOST_USER_GET_STATUS] = "VHOST_GET_STATUS",
> };
>
> static int
> @@ -280,6 +282,14 @@ vhost_user_sock(struct virtio_user_dev *dev,
> need_reply = 1;
> break;
>
> + case VHOST_USER_SET_STATUS:
> + if (!(dev->protocol_features &
> + (1ULL <<
> VHOST_USER_PROTOCOL_F_STATUS)))
> + return 0;
> +
> + if (has_reply_ack)
> + msg.flags |= VHOST_USER_NEED_REPLY_MASK;
> + /* Fallthrough */
There's a coding style issue here:
WARNING:PREFER_FALLTHROUGH: Prefer 'fallthrough;' over fallthrough comment.
Could you fix this?
> case VHOST_USER_SET_FEATURES:
> case VHOST_USER_SET_PROTOCOL_FEATURES:
> case VHOST_USER_SET_LOG_BASE:
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 0a6991bcc..2c400a448 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -424,7 +424,8 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
>
> #define VIRTIO_USER_SUPPORTED_PROTOCOL_FEATURES \
> (1ULL << VHOST_USER_PROTOCOL_F_MQ | \
> - 1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK)
> + 1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
> + 1ULL << VHOST_USER_PROTOCOL_F_STATUS)
>
> int
> virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, @@
> -
> 783,3 +784,23 @@ virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t
> queue_idx)
> __atomic_add_fetch(&vring->used->idx, 1,
> __ATOMIC_RELAXED);
> }
> }
> +
> +int
> +virtio_user_send_status_update(struct virtio_user_dev *dev, uint8_t
> +status) {
> + int ret;
> + uint64_t arg = status;
> +
> + /* Vhost-user only for now */
> + if (!is_vhost_user_by_type(dev->path))
> + return 0;
> +
> + if (!(dev->protocol_features & (1ULL <<
> VHOST_USER_PROTOCOL_F_STATUS)))
> + return 0;
> +
> + ret = dev->ops->send_request(dev, VHOST_USER_SET_STATUS, &arg);
> + if (ret)
> + return -1;
Do you think we should add a log here to show if SET_STAUTS failed?
Thanks!
Chenbo
> +
> + 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 10b274d19..a76d7cfaf 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -74,4 +74,5 @@ void virtio_user_handle_cq(struct virtio_user_dev *dev,
> uint16_t queue_idx); void virtio_user_handle_cq_packed(struct virtio_user_dev
> *dev,
> uint16_t queue_idx);
> uint8_t virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs);
> +int virtio_user_send_status_update(struct virtio_user_dev *dev, uint8_t
> +status);
> #endif
> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
> b/drivers/net/virtio/virtio_user_ethdev.c
> index 5b06d8e89..e52f11341 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -273,6 +273,7 @@ virtio_user_set_status(struct virtio_hw *hw, uint8_t
> status)
> else if (status == VIRTIO_CONFIG_STATUS_RESET)
> virtio_user_reset(hw);
> dev->status = status;
> + virtio_user_send_status_update(dev, status);
> }
>
> static uint8_t
> --
> 2.26.2
