On 12/22/2021 6:20 AM, Eli Cohen wrote:
Add max_supported_vqs field to struct vdpa_mgmt_dev. Upstream drivers
need to feel this value according to the device capabilities.
This value is reported back in a netlink message when showing management
devices.
Examples:
$ vdpa mgmtdev show
auxiliary/mlx5_core.sf.1:
supported_classes net
max_supported_vqs 257
$ vdpa -j mgmtdev show
{"mgmtdev":{"auxiliary/mlx5_core.sf.1":{"supported_classes":["net"],"max_supported_vqs":257}}}
$ vdpa -jp mgmtdev show
{
"mgmtdev": {
"auxiliary/mlx5_core.sf.1": {
"supported_classes": [ "net" ],
"max_supported_vqs": 257
}
}
}
Signed-off-by: Eli Cohen <[email protected]>
---
drivers/vdpa/vdpa.c | 3 +++
include/linux/vdpa.h | 1 +
include/uapi/linux/vdpa.h | 1 +
3 files changed, 5 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 462da4968270..ea22aa864dd5 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -514,6 +514,9 @@ static int vdpa_mgmtdev_fill(const struct vdpa_mgmt_dev
*mdev, struct sk_buff *m
err = -EMSGSIZE;
goto msg_err;
}
+ if (nla_put_u32(msg, VDPA_ATTR_DEV_MGMTDEV_MAX_VQS,
+ mdev->max_supported_vqs))
+ goto msg_err;
genlmsg_end(msg, hdr);
return 0;
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 47e2b780e4bc..bd75af4feaf7 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -448,6 +448,7 @@ struct vdpa_mgmt_dev {
const struct virtio_device_id *id_table;
u64 config_attr_mask;
struct list_head list;
+ u32 max_supported_vqs;
};
int vdpa_mgmtdev_register(struct vdpa_mgmt_dev *mdev);
diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
index db3738ef3beb..995257c6bf2a 100644
--- a/include/uapi/linux/vdpa.h
+++ b/include/uapi/linux/vdpa.h
@@ -44,6 +44,7 @@ enum vdpa_attr {
VDPA_ATTR_DEV_NET_CFG_MTU, /* u16 */
VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
+ VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u16 */
s/u16/u32/
-Siwei
/* new attributes must be added above here */
VDPA_ATTR_MAX,
};
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