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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) Amazon.com, Inc. or its affiliates.
* All rights reserved.
*/
#include "linux/pci.h"
#include "ena_devlink.h"
#include "ena_phc.h"
static int ena_devlink_enable_phc_validate(struct devlink *devlink, u32 id,
union devlink_param_value val,
struct netlink_ext_ack *extack)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
if (!val.vbool)
return 0;
if (!ena_com_phc_supported(adapter->ena_dev)) {
NL_SET_ERR_MSG_MOD(extack, "Device doesn't support PHC");
return -EOPNOTSUPP;
}
return 0;
}
static const struct devlink_param ena_devlink_params[] = {
DEVLINK_PARAM_GENERIC(ENABLE_PHC,
BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
NULL,
NULL,
ena_devlink_enable_phc_validate),
};
void ena_devlink_params_get(struct devlink *devlink)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
union devlink_param_value val;
int err;
err = devl_param_driverinit_value_get(devlink,
DEVLINK_PARAM_GENERIC_ID_ENABLE_PHC,
&val);
if (err) {
netdev_err(adapter->netdev, "Failed to query PHC param\n");
return;
}
ena_phc_enable(adapter, val.vbool);
}
void ena_devlink_disable_phc_param(struct devlink *devlink)
{
union devlink_param_value value;
devl_lock(devlink);
value.vbool = false;
devl_param_driverinit_value_set(devlink,
DEVLINK_PARAM_GENERIC_ID_ENABLE_PHC,
value);
devl_unlock(devlink);
}
static void ena_devlink_port_register(struct devlink *devlink)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
struct devlink_port_attrs attrs = {};
attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
devlink_port_attrs_set(&adapter->devlink_port, &attrs);
devl_port_register(devlink, &adapter->devlink_port, 0);
}
static void ena_devlink_port_unregister(struct devlink *devlink)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
devl_port_unregister(&adapter->devlink_port);
}
static int ena_devlink_reload_down(struct devlink *devlink,
bool netns_change,
enum devlink_reload_action action,
enum devlink_reload_limit limit,
struct netlink_ext_ack *extack)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
if (netns_change) {
NL_SET_ERR_MSG_MOD(extack,
"Namespace change is not supported");
return -EOPNOTSUPP;
}
ena_devlink_port_unregister(devlink);
rtnl_lock();
ena_destroy_device(adapter, false);
rtnl_unlock();
return 0;
}
static int ena_devlink_reload_up(struct devlink *devlink,
enum devlink_reload_action action,
enum devlink_reload_limit limit,
u32 *actions_performed,
struct netlink_ext_ack *extack)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
int err = 0;
rtnl_lock();
/* Check that no other routine initialized the device (e.g.
* ena_fw_reset_device()). Also we're under devlink_mutex here,
* so devlink isn't freed under our feet.
*/
if (!test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
err = ena_restore_device(adapter);
rtnl_unlock();
ena_devlink_port_register(devlink);
if (!err)
*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
return err;
}
static const struct devlink_ops ena_devlink_ops = {
.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
.reload_down = ena_devlink_reload_down,
.reload_up = ena_devlink_reload_up,
};
static int ena_devlink_configure_params(struct devlink *devlink)
{
struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
union devlink_param_value value;
int rc;
rc = devlink_params_register(devlink, ena_devlink_params,
ARRAY_SIZE(ena_devlink_params));
if (rc) {
netdev_err(adapter->netdev, "Failed to register devlink params\n");
return rc;
}
devl_lock(devlink);
value.vbool = ena_phc_is_enabled(adapter);
devl_param_driverinit_value_set(devlink,
DEVLINK_PARAM_GENERIC_ID_ENABLE_PHC,
value);
devl_unlock(devlink);
return 0;
}
struct devlink *ena_devlink_alloc(struct ena_adapter *adapter)
{
struct device *dev = &adapter->pdev->dev;
struct devlink *devlink;
devlink = devlink_alloc(&ena_devlink_ops,
sizeof(struct ena_adapter *),
dev);
if (!devlink) {
netdev_err(adapter->netdev,
"Failed to allocate devlink struct\n");
return NULL;
}
ENA_DEVLINK_PRIV(devlink) = adapter;
adapter->devlink = devlink;
if (ena_devlink_configure_params(devlink))
goto free_devlink;
return devlink;
free_devlink:
devlink_free(devlink);
return NULL;
}
static void ena_devlink_configure_params_clean(struct devlink *devlink)
{
devlink_params_unregister(devlink, ena_devlink_params,
ARRAY_SIZE(ena_devlink_params));
}
void ena_devlink_free(struct devlink *devlink)
{
ena_devlink_configure_params_clean(devlink);
devlink_free(devlink);
}
void ena_devlink_register(struct devlink *devlink, struct device *dev)
{
devl_lock(devlink);
ena_devlink_port_register(devlink);
devl_register(devlink);
devl_unlock(devlink);
}
void ena_devlink_unregister(struct devlink *devlink)
{
devl_lock(devlink);
ena_devlink_port_unregister(devlink);
devl_unregister(devlink);
devl_unlock(devlink);
}
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