Messages in this thread Patch in this message | | | From | Shay Drory <> | Subject | [PATCH net-next 3/4] devlink: Add new cpu_affinity generic device param | Date | Tue, 22 Feb 2022 12:58:11 +0200 |
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Add new device generic parameter to configure device affinity.
A user who wishes to customize the affinity of the device can do it using below example.
$ devlink dev param set auxiliary/mlx5_core.sf.4 name cpu_affinity \ value [cpu_bitmask] cmode driverinit $ devlink dev reload pci/0000:06:00.0
At this point devlink instance will use the customize affinity.
Signed-off-by: Shay Drory <shayd@nvidia.com> --- Documentation/networking/devlink/devlink-params.rst | 5 +++++ include/net/devlink.h | 4 ++++ net/core/devlink.c | 5 +++++ 3 files changed, 14 insertions(+)
diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst index 4e01dc32bc08..2f9f5baf4373 100644 --- a/Documentation/networking/devlink/devlink-params.rst +++ b/Documentation/networking/devlink/devlink-params.rst @@ -137,3 +137,8 @@ own name. * - ``event_eq_size`` - u32 - Control the size of asynchronous control events EQ. + * - ``cpu_affinity`` + - Bitfield + - control the cpu affinity of the device. user is able to change cpu + affinity also via procfs interface (/proc/irq/\*/smp_affinity). This will + overwrite the devlink setting. diff --git a/include/net/devlink.h b/include/net/devlink.h index f411482f716d..595a4d54a2bd 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -466,6 +466,7 @@ enum devlink_param_generic_id { DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP, DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE, DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE, + DEVLINK_PARAM_GENERIC_ID_CPU_AFFINITY, /* add new param generic ids above here*/ __DEVLINK_PARAM_GENERIC_ID_MAX, @@ -524,6 +525,9 @@ enum devlink_param_generic_id { #define DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME "event_eq_size" #define DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE DEVLINK_PARAM_TYPE_U32 +#define DEVLINK_PARAM_GENERIC_CPU_AFFINITY_NAME "cpu_affinity" +#define DEVLINK_PARAM_GENERIC_CPU_AFFINITY_TYPE DEVLINK_PARAM_TYPE_BITFIELD + #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \ { \ .id = DEVLINK_PARAM_GENERIC_ID_##_id, \ diff --git a/net/core/devlink.c b/net/core/devlink.c index 3d7e27abc487..d2dfd9a88eb1 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -4477,6 +4477,11 @@ static const struct devlink_param devlink_param_generic[] = { .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME, .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE, }, + { + .id = DEVLINK_PARAM_GENERIC_ID_CPU_AFFINITY, + .name = DEVLINK_PARAM_GENERIC_CPU_AFFINITY_NAME, + .type = DEVLINK_PARAM_GENERIC_CPU_AFFINITY_TYPE, + }, }; static int devlink_param_generic_verify(const struct devlink_param *param) -- 2.21.3
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