From: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Date: Mon, 9 Sep 2019 00:54:18 +0100
Subject: devlink: add 'reset_dev_on_drv_probe' param
Patch-mainline: v5.4-rc1
Git-commit: 5bbd21df5a075a59ab53030d25f9848ccca93d73
References: bsc#1154353
Add the 'reset_dev_on_drv_probe' devlink parameter, controlling the
device reset policy on driver probe.
This parameter is useful in conjunction with the existing
'fw_load_policy' parameter.
Signed-off-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
Documentation/networking/devlink-params.txt | 14 ++++++++++++++
include/net/devlink.h | 5 +++++
include/uapi/linux/devlink.h | 7 +++++++
net/core/devlink.c | 5 +++++
4 files changed, 31 insertions(+)
--- a/Documentation/networking/devlink-params.txt
+++ b/Documentation/networking/devlink-params.txt
@@ -51,3 +51,17 @@ fw_load_policy [DEVICE, GENERIC]
* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK (2)
Load firmware currently available on host's disk.
Type: u8
+
+reset_dev_on_drv_probe [DEVICE, GENERIC]
+ Controls the device's reset policy on driver probe.
+ Valid values:
+ * DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN (0)
+ Unknown or invalid value.
+ * DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS (1)
+ Always reset device on driver probe.
+ * DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER (2)
+ Never reset device on driver probe.
+ * DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK (3)
+ Reset only if device firmware can be found in the
+ filesystem.
+ Type: u8
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -398,6 +398,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
+ DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -428,6 +429,10 @@ enum devlink_param_generic_id {
#define DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME "fw_load_policy"
#define DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE DEVLINK_PARAM_TYPE_U8
+#define DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME \
+ "reset_dev_on_drv_probe"
+#define DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE DEVLINK_PARAM_TYPE_U8
+
#define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \
{ \
.id = DEVLINK_PARAM_GENERIC_ID_##_id, \
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -205,6 +205,13 @@ enum devlink_param_fw_load_policy_value
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK,
};
+enum devlink_param_reset_dev_on_drv_probe_value {
+ DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN,
+ DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS,
+ DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER,
+ DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK,
+};
+
enum {
DEVLINK_ATTR_STATS_RX_PACKETS, /* u64 */
DEVLINK_ATTR_STATS_RX_BYTES, /* u64 */
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2852,6 +2852,11 @@ static const struct devlink_param devlin
.name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
.type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
},
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
+ .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
+ .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
+ },
};
static int devlink_param_generic_verify(const struct devlink_param *param)