netdev - [PATCH v2 net-next 01/16] devlink: add fw bank select parameter

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Date:   Tue, 6 Dec 2022 16:44:28 -0800
From:   Shannon Nelson <shannon.nelson@....com>
To:     <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>
CC:     <drivers@...sando.io>, Shannon Nelson <shannon.nelson@....com>
Subject: [PATCH v2 net-next 01/16] devlink: add fw bank select parameter

Add a new device generic parameter to select the bank of
firmware to be used on future boot and/or resets in those
devices that have multiple firmware memory banks.  This can
be used along with the FW_LOAD_POLICY parameter, depending on
the capabilities of the particular device.

Examples:
  $ devlink dev param set pci/0000:07:00.0 name fw_bank value 1 cmode permanent
  $ devlink dev param show pci/0000:07:00.0 name fw_bank
  pci/0000:07:00.0:
    name fw_bank type generic
      values:
        cmode permanent value 1

Link: https://lore.kernel.org/netdev/CO1PR11MB508942BE965E63893DE9B86AD6129@CO1PR11MB5089.namprd11.prod.outlook.com/
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 4e01dc32bc08..7cf1cd68ff08 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -137,3 +137,7 @@ own name.
    * - ``event_eq_size``
      - u32
      - Control the size of asynchronous control events EQ.
+   * - ``fw_bank``
+     - u8
+     - Select the bank of firmware to be used on future boot and/or resets in
+       devices that have multiple firmware memory banks.
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 5f6eca5e4a40..3fa26a26fa44 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -510,6 +510,7 @@ 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_FW_BANK,
 
 	/* add new param generic ids above here*/
 	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -568,6 +569,9 @@ 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_FW_BANK_NAME "fw_bank"
+#define DEVLINK_PARAM_GENERIC_FW_BANK_TYPE DEVLINK_PARAM_TYPE_U8
+
 #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 907df7124157..25a075f0aadd 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -5221,6 +5221,11 @@ 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_FW_BANK,
+		.name = DEVLINK_PARAM_GENERIC_FW_BANK_NAME,
+		.type = DEVLINK_PARAM_GENERIC_FW_BANK_TYPE,
+	},
 };
 
 static int devlink_param_generic_verify(const struct devlink_param *param)
-- 
2.17.1