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Subject[PATCH net-next RFC v5 11/15] devlink: Add enable_remote_dev_reset generic parameter
Date
The enable_remote_dev_reset devlink param flags that the host admin
allows device resets that can be initiated by other hosts. This
parameter is useful for setups where a device is shared by different
hosts, such as multi-host setup. Once the user set this parameter to
false, the driver should NACK any attempt to reset the device while the
driver is loaded.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
Documentation/networking/devlink/devlink-params.rst | 6 ++++++
include/net/devlink.h | 4 ++++
net/core/devlink.c | 5 +++++
3 files changed, 15 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-params.rst b/Documentation/networking/devlink/devlink-params.rst
index d075fd090b3d..54c9f107c4b0 100644
--- a/Documentation/networking/devlink/devlink-params.rst
+++ b/Documentation/networking/devlink/devlink-params.rst
@@ -108,3 +108,9 @@ own name.
* - ``region_snapshot_enable``
- Boolean
- Enable capture of ``devlink-region`` snapshots.
+ * - ``enable_remote_dev_reset``
+ - Boolean
+ - Enable device reset by remote host. When cleared, the device driver
+ will NACK any attempt of other host to reset the device. This parameter
+ is useful for setups where a device is shared by different hosts, such
+ as multi-host setup.
diff --git a/include/net/devlink.h b/include/net/devlink.h
index f09f55a47d09..8ab5ac5c365f 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -445,6 +445,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
+ DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,

/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -482,6 +483,9 @@ enum devlink_param_generic_id {
#define DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME "enable_roce"
#define DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE DEVLINK_PARAM_TYPE_BOOL

+#define DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME "enable_remote_dev_reset"
+#define DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_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 71aeda259e6a..565fa786d01f 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3458,6 +3458,11 @@ static const struct devlink_param devlink_param_generic[] = {
.name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
.type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
},
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
+ },
};

static int devlink_param_generic_verify(const struct devlink_param *param)
--
2.17.1
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