mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-31 03:35:32 -04:00
Code Issues Packages Projects Releases Wiki Activity

devlink: add generic device max_sfs parameter

Browse Source 
Add a new generic devlink device parameter (max_sfs) to control if and
how many light-weight NIC subfunctions can be created. Subfunctions are
a light-weight network functions backed by an underlying PCI function.
Their lifecycle can already be managed by devlink, but currently users
cannot enable them in the device. They can be enabled/disabled only via
external vendor tools. This parameter allows subfunctions to be enabled
(>0) or disabled (0) via devlink. A subsequent patch will add support
for max_sfs to the mlx5 driver.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260806073037.3001886-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nikolay Aleksandrov
2026-08-06 10:30:36 +03:00
committed by Jakub Kicinski
parent 6266eeb24f
commit 26ba30221c
3 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/networking/devlink/devlink-params.rst
View File

@@ -165,3 +165,9 @@ own name.
- u32
- Controls the maximum number of MAC address filters that can be assigned
to a Virtual Function (VF).
* - ``max_sfs``
- u32
- The maximum number of subfunctions which can be created on the device.
Modifying this parameter may require a device restart and PCI bus
rescanning because the BAR layout may change. A value of 0 disables
subfunction creation.

4
include/net/devlink.h
View File

@@ -554,6 +554,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_TOTAL_VFS,
DEVLINK_PARAM_GENERIC_ID_NUM_DOORBELLS,
DEVLINK_PARAM_GENERIC_ID_MAX_MAC_PER_VF,
DEVLINK_PARAM_GENERIC_ID_MAX_SFS,
/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -627,6 +628,9 @@ enum devlink_param_generic_id {
#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_MAX_SFS_NAME "max_sfs"
#define DEVLINK_PARAM_GENERIC_MAX_SFS_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

@@ -117,6 +117,11 @@ static const struct devlink_param devlink_param_generic[] = {
.name = DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_NAME,
.type = DEVLINK_PARAM_GENERIC_MAX_MAC_PER_VF_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_MAX_SFS,
.name = DEVLINK_PARAM_GENERIC_MAX_SFS_NAME,
.type = DEVLINK_PARAM_GENERIC_MAX_SFS_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)