[PATCH v7 4/4] vdpa: Support reading device features
From: Eli Cohen <hidden>
Date: 2022-03-13 17:12:54
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted>
Acked-by: Jason Wang <redacted>
Signed-off-by: Eli Cohen <redacted>
---
vdpa/vdpa.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
index c2b1207af8cf..ffda00e85c26 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)
@@ -495,14 +496,14 @@ 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