netdev - [PATCH v3 net-next 01/14] devlink: add enable

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Date:   Fri, 17 Feb 2023 14:55:45 -0800
From:   Shannon Nelson <shannon.nelson@....com>
To:     <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>
CC:     <drivers@...sando.io>, <brett.creeley@....com>,
        Shannon Nelson <shannon.nelson@....com>
Subject: [PATCH v3 net-next 01/14] devlink: add enable_migration parameter

Add a new device generic parameter to enable/disable support
for live migration in the devlink device.  This is intended
primarily for a core device that supports other ports/VFs/SFs.
Those dependent ports may need their own migratable parameter
for individual enable/disable control.

Examples:
  $ devlink dev param set pci/0000:07:00.0 name enable_migration value true cmode runtime
  $ devlink dev param show pci/0000:07:00.0 name enable_migration
  pci/0000:07:00.0:
    name enable_migration type generic
      values:
        cmode runtime value true

Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
 Documentation/networking/devlink/devlink-params.rst | 3 +++
 include/net/devlink.h                               | 4 ++++
 net/devlink/leftover.c                              | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index 4e01dc32bc08..900216fd56b9 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -137,3 +137,6 @@ own name.
    * - ``event_eq_size``
      - u32
      - Control the size of asynchronous control events EQ.
+   * - ``enable_migration``
+     - Boolean
+     - Enable/disable support for live migration in the devlink device.
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 6a942e70e451..bd85a3ff3774 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -513,6 +513,7 @@ 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_ENABLE_MIGRATION,
 
 	/* add new param generic ids above here*/
 	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -571,6 +572,9 @@ 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_ENABLE_MIGRATION_NAME "enable_migration"
+#define DEVLINK_PARAM_GENERIC_ENABLE_MIGRATION_TYPE DEVLINK_PARAM_TYPE_BOOL
+
 #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate)	\
 {									\
 	.id = DEVLINK_PARAM_GENERIC_ID_##_id,				\
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 3569706c49e1..2e56dfadd37b 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -3923,6 +3923,11 @@ 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_ENABLE_MIGRATION,
+		.name = DEVLINK_PARAM_GENERIC_ENABLE_MIGRATION_NAME,
+		.type = DEVLINK_PARAM_GENERIC_ENABLE_MIGRATION_TYPE,
+	},
 };
 
 static int devlink_param_generic_verify(const struct devlink_param *param)
-- 
2.17.1