devlink: Add new "event_eq_size" generic device param

Add new device generic parameter to determine the size of the
asynchronous control events EQ.

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

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index 547c0b4..da0b5e7 100644 (file)
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -132,3 +132,6 @@ own name.
    * - ``io_eq_size``
      - u32
      - Control the size of I/O completion EQs.
+   * - ``event_eq_size``
+     - u32
+     - Control the size of asynchronous control events EQ.

diff --git a/include/net/devlink.h b/include/net/devlink.h
index b5f4acd..8d5349d 100644 (file)
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -460,6 +460,7 @@ enum devlink_param_generic_id {
        DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
        DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP,
        DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,
+       DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
 
        /* add new param generic ids above here*/
        __DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -515,6 +516,9 @@ enum devlink_param_generic_id {
 #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_EVENT_EQ_SIZE_NAME "event_eq_size"
+#define DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE DEVLINK_PARAM_TYPE_U32
+
 #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 e2e38b8..6366ce3 100644 (file)
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4471,6 +4471,11 @@ static const struct devlink_param devlink_param_generic[] = {
                .name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME,
                .type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE,
        },
+       {
+               .id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
+               .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME,
+               .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE,
+       },
 };
 
 static int devlink_param_generic_verify(const struct devlink_param *param)