On Mon, Feb 21, 2022 at 9:18 PM Eli Cohen <elic@xxxxxxxxxx> wrote:
>
> When showing the available management devices, check if
> VDPA_ATTR_DEV_SUPPORTED_FEATURES feature is available and print the
> supported features for a management device.
>
> Examples:
> $ vdpa mgmtdev show
> auxiliary/mlx5_core.sf.1:
> supported_classes net
> max_supported_vqs 257
> dev_features CSUM GUEST_CSUM MTU HOST_TSO4 HOST_TSO6 STATUS CTRL_VQ MQ \
> CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
>
> $ vdpa -jp mgmtdev show
> {
> "mgmtdev": {
> "auxiliary/mlx5_core.sf.1": {
> "supported_classes": [ "net" ],
> "max_supported_vqs": 257,
> "dev_features": [
> "CSUM","GUEST_CSUM","MTU","HOST_TSO4","HOST_TSO6","STATUS","CTRL_VQ","MQ",\
> "CTRL_MAC_ADDR","VERSION_1","ACCESS_PLATFORM" ]
> }
> }
> }
>
> Reviewed-by: Si-Wei Liu <si-wei.liu@xxxxxxxxxx>
> Signed-off-by: Eli Cohen <elic@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
> ---
> vdpa/include/uapi/linux/vdpa.h | 1 +
> vdpa/vdpa.c | 15 +++++++++++++--
> 2 files changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/vdpa/include/uapi/linux/vdpa.h b/vdpa/include/uapi/linux/vdpa.h
> index a3ebf4d4d9b8..96ccbf305d14 100644
> --- a/vdpa/include/uapi/linux/vdpa.h
> +++ b/vdpa/include/uapi/linux/vdpa.h
> @@ -42,6 +42,7 @@ enum vdpa_attr {
>
> VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
> VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */
> + VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */
>
> /* new attributes must be added above here */
> VDPA_ATTR_MAX,
> diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
> index 22064c755baa..bdc366880ab9 100644
> --- a/vdpa/vdpa.c
> +++ b/vdpa/vdpa.c
> @@ -84,6 +84,7 @@ static const enum mnl_attr_data_type vdpa_policy[VDPA_ATTR_MAX + 1] = {
> [VDPA_ATTR_DEV_MAX_VQ_SIZE] = MNL_TYPE_U16,
> [VDPA_ATTR_DEV_NEGOTIATED_FEATURES] = MNL_TYPE_U64,
> [VDPA_ATTR_DEV_MGMTDEV_MAX_VQS] = MNL_TYPE_U32,
> + [VDPA_ATTR_DEV_SUPPORTED_FEATURES] = MNL_TYPE_U64,
> };
>
> static int attr_cb(const struct nlattr *attr, void *data)
> @@ -494,14 +495,14 @@ static void print_features(struct vdpa *vdpa, uint64_t features, bool mgmtdevf,
> static void pr_out_mgmtdev_show(struct vdpa *vdpa, const struct nlmsghdr *nlh,
> struct nlattr **tb)
> {
> + uint64_t classes = 0;
> const char *class;
> unsigned int i;
>
> pr_out_handle_start(vdpa, tb);
>
> if (tb[VDPA_ATTR_MGMTDEV_SUPPORTED_CLASSES]) {
> - uint64_t classes = mnl_attr_get_u64(tb[VDPA_ATTR_MGMTDEV_SUPPORTED_CLASSES]);
> -
> + classes = mnl_attr_get_u64(tb[VDPA_ATTR_MGMTDEV_SUPPORTED_CLASSES]);
> pr_out_array_start(vdpa, "supported_classes");
>
> for (i = 1; i < 64; i++) {
> @@ -523,6 +524,16 @@ static void pr_out_mgmtdev_show(struct vdpa *vdpa, const struct nlmsghdr *nlh,
> print_uint(PRINT_ANY, "max_supported_vqs", " max_supported_vqs %d", num_vqs);
> }
>
> + if (tb[VDPA_ATTR_DEV_SUPPORTED_FEATURES]) {
> + uint64_t features;
> +
> + features = mnl_attr_get_u64(tb[VDPA_ATTR_DEV_SUPPORTED_FEATURES]);
> + if (classes & BIT(VIRTIO_ID_NET))
> + print_features(vdpa, features, true, VIRTIO_ID_NET);
> + else
> + print_features(vdpa, features, true, 0);
> + }
> +
> pr_out_handle_end(vdpa);
> }
>
> --
> 2.35.1
>
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