Commit 47402385 authored by Shay Drory's avatar Shay Drory Committed by Saeed Mahameed
Browse files

devlink: Add new "io_eq_size" generic device param 



Add new device generic parameter to determine the size of the
I/O completion EQs.

For example, to reduce I/O EQ size to 64, execute:
$ devlink dev param set pci/0000:06:00.0 \
              name io_eq_size value 64 cmode driverinit
$ devlink dev reload pci/0000:06:00.0

Signed-off-by: default avatarShay Drory <shayd@nvidia.com>
Reviewed-by: default avatarMoshe Shemesh <moshe@nvidia.com>
Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent f4f2970d

Documentation/networking/devlink/devlink-params.rst

+3 −0
Original line number Diff line number Diff line
@@ -129,3 +129,6 @@ own name. 
       will NACK any attempt of other host to reset the device. This parameter

       is useful for setups where a device is shared by different hosts, such

       as multi-host setup.

   * - ``io_eq_size``

     - u32

     - Control the size of I/O completion EQs.

include/net/devlink.h

+4 −0
Original line number Diff line number Diff line
@@ -459,6 +459,7 @@ enum devlink_param_generic_id { 
	DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,

	DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,

	DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP,

	DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,



	/* add new param generic ids above here*/

	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -511,6 +512,9 @@ enum devlink_param_generic_id { 
#define DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME "enable_iwarp"

#define DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE DEVLINK_PARAM_TYPE_BOOL



#define DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME "io_eq_size"

#define DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE DEVLINK_PARAM_TYPE_U32



#define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate)	\

{									\

	.id = DEVLINK_PARAM_GENERIC_ID_##_id,				\

net/core/devlink.c

+5 −0
Original line number Diff line number Diff line
@@ -4466,6 +4466,11 @@ static const struct devlink_param devlink_param_generic[] = { 
		.name = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME,

		.type = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE,

	},

	{

		.id = DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,

		.name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME,

		.type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE,

	},

};



static int devlink_param_generic_verify(const struct devlink_param *param)