diff options
| author | Vlad Dumitrescu <vdumitrescu@nvidia.com> | 2025-09-06 18:29:43 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-09 19:14:23 -0700 |
| commit | ce0b015e2619ae64b7d33fb24a6b6cadcd70c317 (patch) | |
| tree | 6253b7ba2d19791182b5e1227e29a277ada354a6 | |
| parent | Merge branch 'mptcp-make-add_addr-retransmission-timeout-adaptive' (diff) | |
| download | linux-ce0b015e2619ae64b7d33fb24a6b6cadcd70c317.tar.gz linux-ce0b015e2619ae64b7d33fb24a6b6cadcd70c317.zip | |
devlink: Add 'total_vfs' generic device param
NICs are typically configured with total_vfs=0, forcing users to rely
on external tools to enable SR-IOV (a widely used and essential feature).
Add total_vfs parameter to devlink for SR-IOV max VF configurability.
Enables standard kernel tools to manage SR-IOV, addressing the need for
flexible VF configuration.
Signed-off-by: Vlad Dumitrescu <vdumitrescu@nvidia.com>
Tested-by: Kamal Heib <kheib@redhat.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250907012953.301746-2-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | Documentation/networking/devlink/devlink-params.rst | 5 | ||||
| -rw-r--r-- | include/net/devlink.h | 4 | ||||
| -rw-r--r-- | net/devlink/param.c | 5 |
3 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst index 211b58177e12..c51da4fba7e7 100644 --- a/Documentation/networking/devlink/devlink-params.rst +++ b/Documentation/networking/devlink/devlink-params.rst @@ -143,3 +143,8 @@ own name. * - ``clock_id`` - u64 - Clock ID used by the device for registering DPLL devices and pins. + * - ``total_vfs`` + - u32 + - The max number of Virtual Functions (VFs) exposed by the PF. + after reboot/pci reset, 'sriov_totalvfs' entry under the device's sysfs + directory will report this value. diff --git a/include/net/devlink.h b/include/net/devlink.h index 5f44e702c25c..8d4362f010e4 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -530,6 +530,7 @@ enum devlink_param_generic_id { DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE, DEVLINK_PARAM_GENERIC_ID_ENABLE_PHC, DEVLINK_PARAM_GENERIC_ID_CLOCK_ID, + DEVLINK_PARAM_GENERIC_ID_TOTAL_VFS, /* add new param generic ids above here*/ __DEVLINK_PARAM_GENERIC_ID_MAX, @@ -594,6 +595,9 @@ enum devlink_param_generic_id { #define DEVLINK_PARAM_GENERIC_CLOCK_ID_NAME "clock_id" #define DEVLINK_PARAM_GENERIC_CLOCK_ID_TYPE DEVLINK_PARAM_TYPE_U64 +#define DEVLINK_PARAM_GENERIC_TOTAL_VFS_NAME "total_vfs" +#define DEVLINK_PARAM_GENERIC_TOTAL_VFS_TYPE DEVLINK_PARAM_TYPE_U32 + #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \ { \ .id = DEVLINK_PARAM_GENERIC_ID_##_id, \ diff --git a/net/devlink/param.c b/net/devlink/param.c index 41dcc86cfd94..33134940c266 100644 --- a/net/devlink/param.c +++ b/net/devlink/param.c @@ -102,6 +102,11 @@ static const struct devlink_param devlink_param_generic[] = { .name = DEVLINK_PARAM_GENERIC_CLOCK_ID_NAME, .type = DEVLINK_PARAM_GENERIC_CLOCK_ID_TYPE, }, + { + .id = DEVLINK_PARAM_GENERIC_ID_TOTAL_VFS, + .name = DEVLINK_PARAM_GENERIC_TOTAL_VFS_NAME, + .type = DEVLINK_PARAM_GENERIC_TOTAL_VFS_TYPE, + }, }; static int devlink_param_generic_verify(const struct devlink_param *param) |