netdev - [PATCH net-next 2/2] devlink: add enable

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Message-ID: <20221205172627.44943-3-shannon.nelson@amd.com>
Date:   Mon, 5 Dec 2022 09:26:27 -0800
From:   Shannon Nelson <shannon.nelson@....com>
To:     <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
        <jiri@...dia.com>
CC:     Shannon Nelson <shannon.nelson@....com>
Subject: [PATCH net-next 2/2] devlink: add enable_migration parameter

To go along with existing enable_eth, enable_roce,
enable_vnet, etc., we add an enable_migration parameter.

This follows from the discussion of this RFC patch
https://lore.kernel.org/netdev/20221118225656.48309-11-snelson@pensando.io/

Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
 Documentation/networking/devlink/devlink-params.rst | 4 ++++
 include/net/devlink.h                               | 4 ++++
 net/core/devlink.c                                  | 5 +++++
 3 files changed, 13 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index ed62c8a92f17..c56caad32a7c 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -141,3 +141,7 @@ own name.
      - u8
      - In a multi-bank flash device, select the FW memory bank to be
        loaded from on the next device boot/reset.
+   * - ``enable_migration``
+     - Boolean
+     - When enabled, the device driver will instantiate a live migration
+       specific auxiliary device of the devlink device.
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 8a1430196980..1d35056a558d 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -511,6 +511,7 @@ enum devlink_param_generic_id {
 	DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,
 	DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
 	DEVLINK_PARAM_GENERIC_ID_FW_BANK,
+	DEVLINK_PARAM_GENERIC_ID_ENABLE_MIGRATION,
 
 	/* add new param generic ids above here*/
 	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -572,6 +573,9 @@ enum devlink_param_generic_id {
 #define DEVLINK_PARAM_GENERIC_FW_BANK_NAME "fw_bank"
 #define DEVLINK_PARAM_GENERIC_FW_BANK_TYPE DEVLINK_PARAM_TYPE_U8
 
+#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/core/devlink.c b/net/core/devlink.c
index 6872d678be5b..0e32a4fe7a66 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -5236,6 +5236,11 @@ static const struct devlink_param devlink_param_generic[] = {
 		.name = DEVLINK_PARAM_GENERIC_FW_BANK_NAME,
 		.type = DEVLINK_PARAM_GENERIC_FW_BANK_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