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net/mlx5: Handle "enable_roce" devlink param

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Register "enable_roce" param, default value is RoCE enabled.
Current configuration is stored on mlx5_core_dev and exposed to user
through the cmode runtime devlink param.
Changing configuration requires changing the cmode driverinit devlink
param and calling devlink reload.

Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Michael Guralnik 2019-11-08 23:45:24 +00:00 committed by Saeed Mahameed
parent e90cde0d76
commit cc9defcbb8
4 changed files with 59 additions and 0 deletions
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21
Documentation/networking/device_drivers/mellanox/mlx5.rst
View File

@ -154,6 +154,27 @@ User command examples:
values:
cmode runtime value smfs
enable_roce: RoCE enablement state
----------------------------------
RoCE enablement state controls driver support for RoCE traffic.
When RoCE is disabled, there is no gid table, only raw ethernet QPs are supported and traffic on the well known UDP RoCE port is handled as raw ethernet traffic.
To change RoCE enablement state a user must change the driverinit cmode value and run devlink reload.
User command examples:
- Disable RoCE::
$ devlink dev param set pci/0000:06:00.0 name enable_roce value false cmode driverinit
$ devlink dev reload pci/0000:06:00.0
- Read RoCE enablement state::
$ devlink dev param show pci/0000:06:00.0 name enable_roce
pci/0000:06:00.0:
name enable_roce type generic
values:
cmode driverinit value true
Devlink health reporters
========================

5
Documentation/networking/devlink-params-mlx5.txt
View File

@ -10,3 +10,8 @@ flow_steering_mode [DEVICE, DRIVER-SPECIFIC]
without firmware intervention.
Type: String
Configuration mode: runtime
enable_roce [DEVICE, GENERIC]
Enable handling of RoCE traffic in the device.
Defaultly enabled.
Configuration mode: driverinit

22
drivers/net/ethernet/mellanox/mlx5/core/devlink.c
View File

@ -177,12 +177,29 @@ enum mlx5_devlink_param_id {
MLX5_DEVLINK_PARAM_FLOW_STEERING_MODE,
};
static int mlx5_devlink_enable_roce_validate(struct devlink *devlink, u32 id,
union devlink_param_value val,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_priv(devlink);
bool new_state = val.vbool;
if (new_state && !MLX5_CAP_GEN(dev, roce)) {
NL_SET_ERR_MSG_MOD(extack, "Device doesn't support RoCE");
return -EOPNOTSUPP;
}
return 0;
}
static const struct devlink_param mlx5_devlink_params[] = {
DEVLINK_PARAM_DRIVER(MLX5_DEVLINK_PARAM_FLOW_STEERING_MODE,
"flow_steering_mode", DEVLINK_PARAM_TYPE_STRING,
BIT(DEVLINK_PARAM_CMODE_RUNTIME),
mlx5_devlink_fs_mode_get, mlx5_devlink_fs_mode_set,
mlx5_devlink_fs_mode_validate),
DEVLINK_PARAM_GENERIC(ENABLE_ROCE, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
NULL, NULL, mlx5_devlink_enable_roce_validate),
};
static void mlx5_devlink_set_params_init_values(struct devlink *devlink)
@ -197,6 +214,11 @@ static void mlx5_devlink_set_params_init_values(struct devlink *devlink)
devlink_param_driverinit_value_set(devlink,
MLX5_DEVLINK_PARAM_FLOW_STEERING_MODE,
value);
value.vbool = MLX5_CAP_GEN(dev, roce);
devlink_param_driverinit_value_set(devlink,
DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
value);
}
int mlx5_devlink_register(struct devlink *devlink, struct device *dev)

11
include/linux/mlx5/driver.h
View File

@ -1191,4 +1191,15 @@ enum {
MLX5_TRIGGERED_CMD_COMP = (u64)1 << 32,
};
static inline bool mlx5_is_roce_enabled(struct mlx5_core_dev *dev)
{
struct devlink *devlink = priv_to_devlink(dev);
union devlink_param_value val;
devlink_param_driverinit_value_get(devlink,
DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
&val);
return val.vbool;
}
#endif /* MLX5_DRIVER_H */