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devlink: Add enable_remote_dev_reset generic parameter

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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>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Moshe Shemesh 2020-10-07 09:00:53 +03:00 committed by Jakub Kicinski
parent 5ec697446f
commit 195d9dece1
3 changed files with 15 additions and 0 deletions
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6
Documentation/networking/devlink/devlink-params.rst
View File

@ -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.

4
include/net/devlink.h
View File

@ -469,6 +469,7 @@ 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,
@ -506,6 +507,9 @@ 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, \

5
net/core/devlink.c
View File

@ -3521,6 +3521,11 @@ 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)