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devlink: Add new "max_mac_per_vf" generic device param

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Add a new device generic parameter to controls the maximum
number of MAC filters allowed per VF.

For example, to limit a VF to 3 MAC addresses:
 $ devlink dev param set pci/0000:3b:00.0 name max_mac_per_vf \
        value 3 \
        cmode runtime

Signed-off-by: Mohammad Heib <mheib@redhat.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Mohammad Heib
2025-10-25 16:08:58 +03:00
committed by Tony Nguyen
parent 13068e9d57
commit 9352d40c8b
3 changed files with 13 additions and 0 deletions
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4
Documentation/networking/devlink/devlink-params.rst
View File

@@ -151,3 +151,7 @@ own name.
* - ``num_doorbells``
- u32
- Controls the number of doorbells used by the device.
* - ``max_mac_per_vf``
- u32
- Controls the maximum number of MAC address filters that can be assigned
to a Virtual Function (VF).

4
include/net/devlink.h
View File

@@ -532,6 +532,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_CLOCK_ID,
DEVLINK_PARAM_GENERIC_ID_TOTAL_VFS,
DEVLINK_PARAM_GENERIC_ID_NUM_DOORBELLS,
DEVLINK_PARAM_GENERIC_ID_MAX_MAC_PER_VF,
/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -602,6 +603,9 @@ enum devlink_param_generic_id {
#define DEVLINK_PARAM_GENERIC_NUM_DOORBELLS_NAME "num_doorbells"
#define DEVLINK_PARAM_GENERIC_NUM_DOORBELLS_TYPE DEVLINK_PARAM_TYPE_U32
#define DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_NAME "max_mac_per_vf"
#define DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_TYPE DEVLINK_PARAM_TYPE_U32
#define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \
{ \
.id = DEVLINK_PARAM_GENERIC_ID_##_id, \

5
net/devlink/param.c
View File

@@ -112,6 +112,11 @@ static const struct devlink_param devlink_param_generic[] = {
.name = DEVLINK_PARAM_GENERIC_NUM_DOORBELLS_NAME,
.type = DEVLINK_PARAM_GENERIC_NUM_DOORBELLS_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_MAX_MAC_PER_VF,
.name = DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_NAME,
.type = DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)