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Message-ID: <20211208070006.13100-2-shayd@nvidia.com>
Date: Wed, 8 Dec 2021 09:00:01 +0200
From: Shay Drory <shayd@...dia.com>
To: "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
CC: <jiri@...dia.com>, <saeedm@...dia.com>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, Shay Drory <shayd@...dia.com>,
Moshe Shemesh <moshe@...dia.com>
Subject: [PATCH net-next v2 1/6] 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: Shay Drory <shayd@...dia.com>
Reviewed-by: Moshe Shemesh <moshe@...dia.com>
---
Documentation/networking/devlink/devlink-params.rst | 3 +++
include/net/devlink.h | 4 ++++
net/core/devlink.c | 5 +++++
3 files changed, 12 insertions(+)
diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index b7dfe693a332..cd9342305a13 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -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``
+ - u16
+ - Control the size of I/O completion EQs.
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 3276a29f2b81..61efa45b8786 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -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_U16
+
#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 db3b52110cf2..0d4e63d11585 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -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)
--
2.21.3
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