Re: [dpdk-dev] [PATCH v3 3/4] net/virtio: add GET_STATUS support to virtio-user

["Xia, Chenbo" <chenbo.xia@intel.com>]

> -----Original Message-----
> From: Adrian Moreno <amorenoz@redhat.com>
> Sent: Wednesday, August 5, 2020 10:45 PM
> To: dev@dpdk.org
> Cc: Wang, Zhihong <zhihong.wang@intel.com>; Xia, Chenbo
> <chenbo.xia@intel.com>; maxime.coquelin@redhat.com; Adrian Moreno
> <amorenoz@redhat.com>
> Subject: [PATCH v3 3/4] net/virtio: add GET_STATUS support to virtio-user
> 
> This patch adds support for VHOST_USER_GET_STATUS request.
> 
> Only vhost-user backed is supported for now
> 
> Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
> ---
>  drivers/net/virtio/virtio_user/vhost_user.c   |  2 +
>  .../net/virtio/virtio_user/virtio_user_dev.c  | 44 +++++++++++++++++++
>  .../net/virtio/virtio_user/virtio_user_dev.h  |  1 +
>  drivers/net/virtio/virtio_user_ethdev.c       |  2 +
>  4 files changed, 49 insertions(+)
> 
> diff --git a/drivers/net/virtio/virtio_user/vhost_user.c
> b/drivers/net/virtio/virtio_user/vhost_user.c
> index 337e51199..12b6c7dbc 100644
> --- a/drivers/net/virtio/virtio_user/vhost_user.c
> +++ b/drivers/net/virtio/virtio_user/vhost_user.c
> @@ -279,6 +279,7 @@ vhost_user_sock(struct virtio_user_dev *dev,
>  	switch (req) {
>  	case VHOST_USER_GET_FEATURES:
>  	case VHOST_USER_GET_PROTOCOL_FEATURES:
> +	case VHOST_USER_GET_STATUS:
>  		need_reply = 1;
>  		break;
> 
> @@ -373,6 +374,7 @@ vhost_user_sock(struct virtio_user_dev *dev,
> 
>  		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)) {
>  				PMD_DRV_LOG(ERR, "Received bad msg size");
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 670fc9d40..2a0c86108 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -807,3 +807,47 @@ virtio_user_send_status_update(struct virtio_user_dev
> *dev, uint8_t status)
> 
>  	return 0;
>  }
> +
> +int
> +virtio_user_update_status(struct virtio_user_dev *dev)
> +{
> +	uint64_t ret;
> +	int err;
> +
> +	/* Vhost-user only for now */
> +	if (!is_vhost_user_by_type(dev->path))
> +		return 0;
> +
> +	if (!(dev->protocol_features & (1UL <<
> VHOST_USER_PROTOCOL_F_STATUS)))
> +		return 0;
> +
> +	err = dev->ops->send_request(dev, VHOST_USER_GET_STATUS, &ret);
> +	if (err) {
> +		PMD_INIT_LOG(ERR, "VHOST_USER_GET_STATUS failed (%d): %s", err,
> +			     strerror(errno));
> +		return -1;
> +	}
> +	if (ret > UINT8_MAX) {
> +		PMD_INIT_LOG(ERR, "Invalid VHOST_USER_GET_STATUS response 0x%"
> PRIx64 "\n", ret);
> +		return -1;
> +	}
> +
> +	dev->status = ret;
> +	PMD_INIT_LOG(DEBUG, "Updated Device Status(0x%08x):\n"
> +			"\t-RESET: %u\n"
> +			"\t-ACKNOWLEDGE: %u\n"
> +			"\t-DRIVER: %u\n"
> +			"\t-DRIVER_OK: %u\n"
> +			"\t-FEATURES_OK: %u\n"
> +			"\t-DEVICE_NEED_RESET: %u\n"
> +			"\t-FAILED: %u\n",
> +			dev->status,
> +			(dev->status == VIRTIO_CONFIG_STATUS_RESET),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_ACK),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_DRIVER),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_FEATURES_OK),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_DEV_NEED_RESET),
> +			!!(dev->status & VIRTIO_CONFIG_STATUS_FAILED));
> +	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 835ab64ae..9377d5ba6 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -73,4 +73,5 @@ 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);
> +int virtio_user_update_status(struct virtio_user_dev *dev);
>  #endif
> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
> b/drivers/net/virtio/virtio_user_ethdev.c
> index 785882e06..87f6cb695 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -280,6 +280,8 @@ virtio_user_get_status(struct virtio_hw *hw)
>  {
>  	struct virtio_user_dev *dev = virtio_user_get_dev(hw);
> 
> +	virtio_user_update_status(dev);
> +
>  	return dev->status;
>  }
> 
> --
> 2.26.2

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>