drivers/net/ethernet/mellanox/mlx5/core/dpll.c - pub/scm/linux/kernel/git/geert/linux-m68k - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 /* Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */

 #include <linux/dpll.h>
 #include <linux/mlx5/driver.h>

 /* This structure represents a reference to DPLL, one is created
  * per mdev instance.
  */
 struct mlx5_dpll {
 	struct dpll_device *dpll;
 	struct dpll_pin *dpll_pin;
 	struct mlx5_core_dev *mdev;
 	struct workqueue_struct *wq;
 	struct delayed_work work;
 	struct {
 		bool valid;
 		enum dpll_lock_status lock_status;
 		enum dpll_pin_state pin_state;
 	} last;
 	struct notifier_block mdev_nb;
 	struct net_device *tracking_netdev;
 };

 static int mlx5_dpll_clock_id_get(struct mlx5_core_dev *mdev, u64 *clock_id)
 {
 	u32 out[MLX5_ST_SZ_DW(msecq_reg)] = {};
 	u32 in[MLX5_ST_SZ_DW(msecq_reg)] = {};
 	int err;

 	err = mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
 				   MLX5_REG_MSECQ, 0, 0);
 	if (err)
 		return err;
 	*clock_id = MLX5_GET64(msecq_reg, out, local_clock_identity);
 	return 0;
 }

 struct mlx5_dpll_synce_status {
 	enum mlx5_msees_admin_status admin_status;
 	enum mlx5_msees_oper_status oper_status;
 	bool ho_acq;
 	bool oper_freq_measure;
 	enum mlx5_msees_failure_reason failure_reason;
 	s32 frequency_diff;
 };

 static int
 mlx5_dpll_synce_status_get(struct mlx5_core_dev *mdev,
 			   struct mlx5_dpll_synce_status *synce_status)
 {
 	u32 out[MLX5_ST_SZ_DW(msees_reg)] = {};
 	u32 in[MLX5_ST_SZ_DW(msees_reg)] = {};
 	int err;

 	err = mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
 				   MLX5_REG_MSEES, 0, 0);
 	if (err)
 		return err;
 	synce_status->admin_status = MLX5_GET(msees_reg, out, admin_status);
 	synce_status->oper_status = MLX5_GET(msees_reg, out, oper_status);
 	synce_status->ho_acq = MLX5_GET(msees_reg, out, ho_acq);
 	synce_status->oper_freq_measure = MLX5_GET(msees_reg, out, oper_freq_measure);
 	synce_status->failure_reason = MLX5_GET(msees_reg, out, failure_reason);
 	synce_status->frequency_diff = MLX5_GET(msees_reg, out, frequency_diff);
 	return 0;
 }

 static int
 mlx5_dpll_synce_status_set(struct mlx5_core_dev *mdev,
 			   enum mlx5_msees_admin_status admin_status)
 {
 	u32 out[MLX5_ST_SZ_DW(msees_reg)] = {};
 	u32 in[MLX5_ST_SZ_DW(msees_reg)] = {};

 	MLX5_SET(msees_reg, in, field_select,
 		 MLX5_MSEES_FIELD_SELECT_ENABLE |
 		 MLX5_MSEES_FIELD_SELECT_ADMIN_FREQ_MEASURE |
 		 MLX5_MSEES_FIELD_SELECT_ADMIN_STATUS);
 	MLX5_SET(msees_reg, in, admin_status, admin_status);
 	MLX5_SET(msees_reg, in, admin_freq_measure, true);
 	return mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
 				    MLX5_REG_MSEES, 0, 1);
 }

 static enum dpll_lock_status
 mlx5_dpll_lock_status_get(struct mlx5_dpll_synce_status *synce_status)
 {
 	switch (synce_status->oper_status) {
 	case MLX5_MSEES_OPER_STATUS_SELF_TRACK:
 		fallthrough;
 	case MLX5_MSEES_OPER_STATUS_OTHER_TRACK:
 		return synce_status->ho_acq ? DPLL_LOCK_STATUS_LOCKED_HO_ACQ :
 					      DPLL_LOCK_STATUS_LOCKED;
 	case MLX5_MSEES_OPER_STATUS_HOLDOVER:
 		fallthrough;
 	case MLX5_MSEES_OPER_STATUS_FAIL_HOLDOVER:
 		return DPLL_LOCK_STATUS_HOLDOVER;
 	default:
 		return DPLL_LOCK_STATUS_UNLOCKED;
 	}
 }

 static enum dpll_lock_status_error
 mlx5_dpll_lock_status_error_get(struct mlx5_dpll_synce_status *synce_status)
 {
 	switch (synce_status->oper_status) {
 	case MLX5_MSEES_OPER_STATUS_FAIL_HOLDOVER:
 		fallthrough;
 	case MLX5_MSEES_OPER_STATUS_FAIL_FREE_RUNNING:
 		switch (synce_status->failure_reason) {
 		case MLX5_MSEES_FAILURE_REASON_PORT_DOWN:
 			return DPLL_LOCK_STATUS_ERROR_MEDIA_DOWN;
 		case MLX5_MSEES_FAILURE_REASON_TOO_HIGH_FREQUENCY_DIFF:
 			return DPLL_LOCK_STATUS_ERROR_FRACTIONAL_FREQUENCY_OFFSET_TOO_HIGH;
 		default:
 			return DPLL_LOCK_STATUS_ERROR_UNDEFINED;
 		}
 	default:
 		return DPLL_LOCK_STATUS_ERROR_NONE;
 	}
 }

 static enum dpll_pin_state
 mlx5_dpll_pin_state_get(struct mlx5_dpll_synce_status *synce_status)
 {
 	return (synce_status->admin_status == MLX5_MSEES_ADMIN_STATUS_TRACK &&
 		(synce_status->oper_status == MLX5_MSEES_OPER_STATUS_SELF_TRACK ||
 		 synce_status->oper_status == MLX5_MSEES_OPER_STATUS_OTHER_TRACK)) ?
 	       DPLL_PIN_STATE_CONNECTED : DPLL_PIN_STATE_DISCONNECTED;
 }

 static int
 mlx5_dpll_pin_ffo_get(struct mlx5_dpll_synce_status *synce_status,
 		      s64 *ffo)
 {
 	if (!synce_status->oper_freq_measure)
 		return -ENODATA;
 	*ffo = synce_status->frequency_diff;
 	return 0;
 }

 static int
 mlx5_dpll_device_lock_status_get(const struct dpll_device *dpll, void *priv,
 				 enum dpll_lock_status *status,
 				 enum dpll_lock_status_error *status_error,
 				 struct netlink_ext_ack *extack)
 {
 	struct mlx5_dpll_synce_status synce_status;
 	struct mlx5_dpll *mdpll = priv;
 	int err;

 	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
 	if (err)
 		return err;
 	*status = mlx5_dpll_lock_status_get(&synce_status);
 	*status_error = mlx5_dpll_lock_status_error_get(&synce_status);
 	return 0;
 }

 static int mlx5_dpll_device_mode_get(const struct dpll_device *dpll,
 				     void *priv, enum dpll_mode *mode,
 				     struct netlink_ext_ack *extack)
 {
 	*mode = DPLL_MODE_MANUAL;
 	return 0;
 }

 static const struct dpll_device_ops mlx5_dpll_device_ops = {
 	.lock_status_get = mlx5_dpll_device_lock_status_get,
 	.mode_get = mlx5_dpll_device_mode_get,
 };

 static int mlx5_dpll_pin_direction_get(const struct dpll_pin *pin,
 				       void *pin_priv,
 				       const struct dpll_device *dpll,
 				       void *dpll_priv,
 				       enum dpll_pin_direction *direction,
 				       struct netlink_ext_ack *extack)
 {
 	*direction = DPLL_PIN_DIRECTION_INPUT;
 	return 0;
 }

 static int mlx5_dpll_state_on_dpll_get(const struct dpll_pin *pin,
 				       void *pin_priv,
 				       const struct dpll_device *dpll,
 				       void *dpll_priv,
 				       enum dpll_pin_state *state,
 				       struct netlink_ext_ack *extack)
 {
 	struct mlx5_dpll_synce_status synce_status;
 	struct mlx5_dpll *mdpll = pin_priv;
 	int err;

 	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
 	if (err)
 		return err;
 	*state = mlx5_dpll_pin_state_get(&synce_status);
 	return 0;
 }

 static int mlx5_dpll_state_on_dpll_set(const struct dpll_pin *pin,
 				       void *pin_priv,
 				       const struct dpll_device *dpll,
 				       void *dpll_priv,
 				       enum dpll_pin_state state,
 				       struct netlink_ext_ack *extack)
 {
 	struct mlx5_dpll *mdpll = pin_priv;

 	return mlx5_dpll_synce_status_set(mdpll->mdev,
 					  state == DPLL_PIN_STATE_CONNECTED ?
 					  MLX5_MSEES_ADMIN_STATUS_TRACK :
 					  MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
 }

 static int mlx5_dpll_ffo_get(const struct dpll_pin *pin, void *pin_priv,
 			     const struct dpll_device *dpll, void *dpll_priv,
 			     s64 *ffo, struct netlink_ext_ack *extack)
 {
 	struct mlx5_dpll_synce_status synce_status;
 	struct mlx5_dpll *mdpll = pin_priv;
 	int err;

 	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
 	if (err)
 		return err;
 	return mlx5_dpll_pin_ffo_get(&synce_status, ffo);
 }

 static const struct dpll_pin_ops mlx5_dpll_pins_ops = {
 	.direction_get = mlx5_dpll_pin_direction_get,
 	.state_on_dpll_get = mlx5_dpll_state_on_dpll_get,
 	.state_on_dpll_set = mlx5_dpll_state_on_dpll_set,
 	.ffo_get = mlx5_dpll_ffo_get,
 };

 static const struct dpll_pin_properties mlx5_dpll_pin_properties = {
 	.type = DPLL_PIN_TYPE_SYNCE_ETH_PORT,
 	.capabilities = DPLL_PIN_CAPABILITIES_STATE_CAN_CHANGE,
 };

 #define MLX5_DPLL_PERIODIC_WORK_INTERVAL 500 /* ms */

 static void mlx5_dpll_periodic_work_queue(struct mlx5_dpll *mdpll)
 {
 	queue_delayed_work(mdpll->wq, &mdpll->work,
 			   msecs_to_jiffies(MLX5_DPLL_PERIODIC_WORK_INTERVAL));
 }

 static void mlx5_dpll_periodic_work(struct work_struct *work)
 {
 	struct mlx5_dpll *mdpll = container_of(work, struct mlx5_dpll,
 					       work.work);
 	struct mlx5_dpll_synce_status synce_status;
 	enum dpll_lock_status lock_status;
 	enum dpll_pin_state pin_state;
 	int err;

 	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
 	if (err)
 		goto err_out;
 	lock_status = mlx5_dpll_lock_status_get(&synce_status);
 	pin_state = mlx5_dpll_pin_state_get(&synce_status);

 	if (!mdpll->last.valid)
 		goto invalid_out;

 	if (mdpll->last.lock_status != lock_status)
 		dpll_device_change_ntf(mdpll->dpll);
 	if (mdpll->last.pin_state != pin_state)
 		dpll_pin_change_ntf(mdpll->dpll_pin);

 invalid_out:
 	mdpll->last.lock_status = lock_status;
 	mdpll->last.pin_state = pin_state;
 	mdpll->last.valid = true;
 err_out:
 	mlx5_dpll_periodic_work_queue(mdpll);
 }

 static void mlx5_dpll_netdev_dpll_pin_set(struct mlx5_dpll *mdpll,
 					  struct net_device *netdev)
 {
 	if (mdpll->tracking_netdev)
 		return;
 	dpll_netdev_pin_set(netdev, mdpll->dpll_pin);
 	mdpll->tracking_netdev = netdev;
 }

 static void mlx5_dpll_netdev_dpll_pin_clear(struct mlx5_dpll *mdpll)
 {
 	if (!mdpll->tracking_netdev)
 		return;
 	dpll_netdev_pin_clear(mdpll->tracking_netdev);
 	mdpll->tracking_netdev = NULL;
 }

 static int mlx5_dpll_mdev_notifier_event(struct notifier_block *nb,
 					 unsigned long event, void *data)
 {
 	struct mlx5_dpll *mdpll = container_of(nb, struct mlx5_dpll, mdev_nb);
 	struct net_device *netdev = data;

 	switch (event) {
 	case MLX5_DRIVER_EVENT_UPLINK_NETDEV:
 		if (netdev)
 			mlx5_dpll_netdev_dpll_pin_set(mdpll, netdev);
 		else
 			mlx5_dpll_netdev_dpll_pin_clear(mdpll);
 		break;
 	default:
 		return NOTIFY_DONE;
 	}

 	return NOTIFY_OK;
 }

 static void mlx5_dpll_mdev_netdev_track(struct mlx5_dpll *mdpll,
 					struct mlx5_core_dev *mdev)
 {
 	mdpll->mdev_nb.notifier_call = mlx5_dpll_mdev_notifier_event;
 	mlx5_blocking_notifier_register(mdev, &mdpll->mdev_nb);
 	mlx5_core_uplink_netdev_event_replay(mdev);
 }

 static void mlx5_dpll_mdev_netdev_untrack(struct mlx5_dpll *mdpll,
 					  struct mlx5_core_dev *mdev)
 {
 	mlx5_blocking_notifier_unregister(mdev, &mdpll->mdev_nb);
 	mlx5_dpll_netdev_dpll_pin_clear(mdpll);
 }

 static int mlx5_dpll_probe(struct auxiliary_device *adev,
 			   const struct auxiliary_device_id *id)
 {
 	struct mlx5_adev *edev = container_of(adev, struct mlx5_adev, adev);
 	struct mlx5_core_dev *mdev = edev->mdev;
 	struct mlx5_dpll *mdpll;
 	u64 clock_id;
 	int err;

 	err = mlx5_dpll_synce_status_set(mdev,
 					 MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
 	if (err)
 		return err;

 	err = mlx5_dpll_clock_id_get(mdev, &clock_id);
 	if (err)
 		return err;

 	mdpll = kzalloc(sizeof(*mdpll), GFP_KERNEL);
 	if (!mdpll)
 		return -ENOMEM;
 	mdpll->mdev = mdev;
 	auxiliary_set_drvdata(adev, mdpll);

 	/* Multiple mdev instances might share one DPLL device. */
 	mdpll->dpll = dpll_device_get(clock_id, 0, THIS_MODULE);
 	if (IS_ERR(mdpll->dpll)) {
 		err = PTR_ERR(mdpll->dpll);
 		goto err_free_mdpll;
 	}

 	err = dpll_device_register(mdpll->dpll, DPLL_TYPE_EEC,
 				   &mlx5_dpll_device_ops, mdpll);
 	if (err)
 		goto err_put_dpll_device;

 	/* Multiple mdev instances might share one DPLL pin. */
 	mdpll->dpll_pin = dpll_pin_get(clock_id, mlx5_get_dev_index(mdev),
 				       THIS_MODULE, &mlx5_dpll_pin_properties);
 	if (IS_ERR(mdpll->dpll_pin)) {
 		err = PTR_ERR(mdpll->dpll_pin);
 		goto err_unregister_dpll_device;
 	}

 	err = dpll_pin_register(mdpll->dpll, mdpll->dpll_pin,
 				&mlx5_dpll_pins_ops, mdpll);
 	if (err)
 		goto err_put_dpll_pin;

 	mdpll->wq = create_singlethread_workqueue("mlx5_dpll");
 	if (!mdpll->wq) {
 		err = -ENOMEM;
 		goto err_unregister_dpll_pin;
 	}

 	mlx5_dpll_mdev_netdev_track(mdpll, mdev);

 	INIT_DELAYED_WORK(&mdpll->work, &mlx5_dpll_periodic_work);
 	mlx5_dpll_periodic_work_queue(mdpll);

 	return 0;

 err_unregister_dpll_pin:
 	dpll_pin_unregister(mdpll->dpll, mdpll->dpll_pin,
 			    &mlx5_dpll_pins_ops, mdpll);
 err_put_dpll_pin:
 	dpll_pin_put(mdpll->dpll_pin);
 err_unregister_dpll_device:
 	dpll_device_unregister(mdpll->dpll, &mlx5_dpll_device_ops, mdpll);
 err_put_dpll_device:
 	dpll_device_put(mdpll->dpll);
 err_free_mdpll:
 	kfree(mdpll);
 	return err;
 }

 static void mlx5_dpll_remove(struct auxiliary_device *adev)
 {
 	struct mlx5_dpll *mdpll = auxiliary_get_drvdata(adev);
 	struct mlx5_core_dev *mdev = mdpll->mdev;

 	cancel_delayed_work_sync(&mdpll->work);
 	mlx5_dpll_mdev_netdev_untrack(mdpll, mdev);
 	destroy_workqueue(mdpll->wq);
 	dpll_pin_unregister(mdpll->dpll, mdpll->dpll_pin,
 			    &mlx5_dpll_pins_ops, mdpll);
 	dpll_pin_put(mdpll->dpll_pin);
 	dpll_device_unregister(mdpll->dpll, &mlx5_dpll_device_ops, mdpll);
 	dpll_device_put(mdpll->dpll);
 	kfree(mdpll);

 	mlx5_dpll_synce_status_set(mdev,
 				   MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
 }

 static int mlx5_dpll_suspend(struct auxiliary_device *adev, pm_message_t state)
 {
 	return 0;
 }

 static int mlx5_dpll_resume(struct auxiliary_device *adev)
 {
 	return 0;
 }

 static const struct auxiliary_device_id mlx5_dpll_id_table[] = {
 	{ .name = MLX5_ADEV_NAME ".dpll", },
 	{},
 };

 MODULE_DEVICE_TABLE(auxiliary, mlx5_dpll_id_table);

 static struct auxiliary_driver mlx5_dpll_driver = {
 	.name = "dpll",
 	.probe = mlx5_dpll_probe,
 	.remove = mlx5_dpll_remove,
 	.suspend = mlx5_dpll_suspend,
 	.resume = mlx5_dpll_resume,
 	.id_table = mlx5_dpll_id_table,
 };

 static int __init mlx5_dpll_init(void)
 {
 	return auxiliary_driver_register(&mlx5_dpll_driver);
 }

 static void __exit mlx5_dpll_exit(void)
 {
 	auxiliary_driver_unregister(&mlx5_dpll_driver);
 }

 module_init(mlx5_dpll_init);
 module_exit(mlx5_dpll_exit);

 MODULE_AUTHOR("Jiri Pirko <jiri@nvidia.com>");
 MODULE_DESCRIPTION("Mellanox 5th generation network adapters (ConnectX series) DPLL driver");
 MODULE_LICENSE("Dual BSD/GPL");
	// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
	/* Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */

	#include <linux/dpll.h>
	#include <linux/mlx5/driver.h>

	/* This structure represents a reference to DPLL, one is created
	* per mdev instance.
	*/
	struct mlx5_dpll {
	struct dpll_device *dpll;
	struct dpll_pin *dpll_pin;
	struct mlx5_core_dev *mdev;
	struct workqueue_struct *wq;
	struct delayed_work work;
	struct {
	bool valid;
	enum dpll_lock_status lock_status;
	enum dpll_pin_state pin_state;
	} last;
	struct notifier_block mdev_nb;
	struct net_device *tracking_netdev;
	};

	static int mlx5_dpll_clock_id_get(struct mlx5_core_dev mdev, u64 clock_id)
	{
	u32 out[MLX5_ST_SZ_DW(msecq_reg)] = {};
	u32 in[MLX5_ST_SZ_DW(msecq_reg)] = {};
	int err;

	err = mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
	MLX5_REG_MSECQ, 0, 0);
	if (err)
	return err;
	*clock_id = MLX5_GET64(msecq_reg, out, local_clock_identity);
	return 0;
	}

	struct mlx5_dpll_synce_status {
	enum mlx5_msees_admin_status admin_status;
	enum mlx5_msees_oper_status oper_status;
	bool ho_acq;
	bool oper_freq_measure;
	enum mlx5_msees_failure_reason failure_reason;
	s32 frequency_diff;
	};

	static int
	mlx5_dpll_synce_status_get(struct mlx5_core_dev *mdev,
	struct mlx5_dpll_synce_status *synce_status)
	{
	u32 out[MLX5_ST_SZ_DW(msees_reg)] = {};
	u32 in[MLX5_ST_SZ_DW(msees_reg)] = {};
	int err;

	err = mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
	MLX5_REG_MSEES, 0, 0);
	if (err)
	return err;
	synce_status->admin_status = MLX5_GET(msees_reg, out, admin_status);
	synce_status->oper_status = MLX5_GET(msees_reg, out, oper_status);
	synce_status->ho_acq = MLX5_GET(msees_reg, out, ho_acq);
	synce_status->oper_freq_measure = MLX5_GET(msees_reg, out, oper_freq_measure);
	synce_status->failure_reason = MLX5_GET(msees_reg, out, failure_reason);
	synce_status->frequency_diff = MLX5_GET(msees_reg, out, frequency_diff);
	return 0;
	}

	static int
	mlx5_dpll_synce_status_set(struct mlx5_core_dev *mdev,
	enum mlx5_msees_admin_status admin_status)
	{
	u32 out[MLX5_ST_SZ_DW(msees_reg)] = {};
	u32 in[MLX5_ST_SZ_DW(msees_reg)] = {};

	MLX5_SET(msees_reg, in, field_select,
	MLX5_MSEES_FIELD_SELECT_ENABLE \|
	MLX5_MSEES_FIELD_SELECT_ADMIN_FREQ_MEASURE \|
	MLX5_MSEES_FIELD_SELECT_ADMIN_STATUS);
	MLX5_SET(msees_reg, in, admin_status, admin_status);
	MLX5_SET(msees_reg, in, admin_freq_measure, true);
	return mlx5_core_access_reg(mdev, in, sizeof(in), out, sizeof(out),
	MLX5_REG_MSEES, 0, 1);
	}

	static enum dpll_lock_status
	mlx5_dpll_lock_status_get(struct mlx5_dpll_synce_status *synce_status)
	{
	switch (synce_status->oper_status) {
	case MLX5_MSEES_OPER_STATUS_SELF_TRACK:
	fallthrough;
	case MLX5_MSEES_OPER_STATUS_OTHER_TRACK:
	return synce_status->ho_acq ? DPLL_LOCK_STATUS_LOCKED_HO_ACQ :
	DPLL_LOCK_STATUS_LOCKED;
	case MLX5_MSEES_OPER_STATUS_HOLDOVER:
	fallthrough;
	case MLX5_MSEES_OPER_STATUS_FAIL_HOLDOVER:
	return DPLL_LOCK_STATUS_HOLDOVER;
	default:
	return DPLL_LOCK_STATUS_UNLOCKED;
	}
	}

	static enum dpll_lock_status_error
	mlx5_dpll_lock_status_error_get(struct mlx5_dpll_synce_status *synce_status)
	{
	switch (synce_status->oper_status) {
	case MLX5_MSEES_OPER_STATUS_FAIL_HOLDOVER:
	fallthrough;
	case MLX5_MSEES_OPER_STATUS_FAIL_FREE_RUNNING:
	switch (synce_status->failure_reason) {
	case MLX5_MSEES_FAILURE_REASON_PORT_DOWN:
	return DPLL_LOCK_STATUS_ERROR_MEDIA_DOWN;
	case MLX5_MSEES_FAILURE_REASON_TOO_HIGH_FREQUENCY_DIFF:
	return DPLL_LOCK_STATUS_ERROR_FRACTIONAL_FREQUENCY_OFFSET_TOO_HIGH;
	default:
	return DPLL_LOCK_STATUS_ERROR_UNDEFINED;
	}
	default:
	return DPLL_LOCK_STATUS_ERROR_NONE;
	}
	}

	static enum dpll_pin_state
	mlx5_dpll_pin_state_get(struct mlx5_dpll_synce_status *synce_status)
	{
	return (synce_status->admin_status == MLX5_MSEES_ADMIN_STATUS_TRACK &&
	(synce_status->oper_status == MLX5_MSEES_OPER_STATUS_SELF_TRACK \|\|
	synce_status->oper_status == MLX5_MSEES_OPER_STATUS_OTHER_TRACK)) ?
	DPLL_PIN_STATE_CONNECTED : DPLL_PIN_STATE_DISCONNECTED;
	}

	static int
	mlx5_dpll_pin_ffo_get(struct mlx5_dpll_synce_status *synce_status,
	s64 *ffo)
	{
	if (!synce_status->oper_freq_measure)
	return -ENODATA;
	*ffo = synce_status->frequency_diff;
	return 0;
	}

	static int
	mlx5_dpll_device_lock_status_get(const struct dpll_device dpll, void priv,
	enum dpll_lock_status *status,
	enum dpll_lock_status_error *status_error,
	struct netlink_ext_ack *extack)
	{
	struct mlx5_dpll_synce_status synce_status;
	struct mlx5_dpll *mdpll = priv;
	int err;

	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
	if (err)
	return err;
	*status = mlx5_dpll_lock_status_get(&synce_status);
	*status_error = mlx5_dpll_lock_status_error_get(&synce_status);
	return 0;
	}

	static int mlx5_dpll_device_mode_get(const struct dpll_device *dpll,
	void priv, enum dpll_mode mode,
	struct netlink_ext_ack *extack)
	{
	*mode = DPLL_MODE_MANUAL;
	return 0;
	}

	static const struct dpll_device_ops mlx5_dpll_device_ops = {
	.lock_status_get = mlx5_dpll_device_lock_status_get,
	.mode_get = mlx5_dpll_device_mode_get,
	};

	static int mlx5_dpll_pin_direction_get(const struct dpll_pin *pin,
	void *pin_priv,
	const struct dpll_device *dpll,
	void *dpll_priv,
	enum dpll_pin_direction *direction,
	struct netlink_ext_ack *extack)
	{
	*direction = DPLL_PIN_DIRECTION_INPUT;
	return 0;
	}

	static int mlx5_dpll_state_on_dpll_get(const struct dpll_pin *pin,
	void *pin_priv,
	const struct dpll_device *dpll,
	void *dpll_priv,
	enum dpll_pin_state *state,
	struct netlink_ext_ack *extack)
	{
	struct mlx5_dpll_synce_status synce_status;
	struct mlx5_dpll *mdpll = pin_priv;
	int err;

	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
	if (err)
	return err;
	*state = mlx5_dpll_pin_state_get(&synce_status);
	return 0;
	}

	static int mlx5_dpll_state_on_dpll_set(const struct dpll_pin *pin,
	void *pin_priv,
	const struct dpll_device *dpll,
	void *dpll_priv,
	enum dpll_pin_state state,
	struct netlink_ext_ack *extack)
	{
	struct mlx5_dpll *mdpll = pin_priv;

	return mlx5_dpll_synce_status_set(mdpll->mdev,
	state == DPLL_PIN_STATE_CONNECTED ?
	MLX5_MSEES_ADMIN_STATUS_TRACK :
	MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
	}

	static int mlx5_dpll_ffo_get(const struct dpll_pin pin, void pin_priv,
	const struct dpll_device dpll, void dpll_priv,
	s64 ffo, struct netlink_ext_ack extack)
	{
	struct mlx5_dpll_synce_status synce_status;
	struct mlx5_dpll *mdpll = pin_priv;
	int err;

	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
	if (err)
	return err;
	return mlx5_dpll_pin_ffo_get(&synce_status, ffo);
	}

	static const struct dpll_pin_ops mlx5_dpll_pins_ops = {
	.direction_get = mlx5_dpll_pin_direction_get,
	.state_on_dpll_get = mlx5_dpll_state_on_dpll_get,
	.state_on_dpll_set = mlx5_dpll_state_on_dpll_set,
	.ffo_get = mlx5_dpll_ffo_get,
	};

	static const struct dpll_pin_properties mlx5_dpll_pin_properties = {
	.type = DPLL_PIN_TYPE_SYNCE_ETH_PORT,
	.capabilities = DPLL_PIN_CAPABILITIES_STATE_CAN_CHANGE,
	};

	#define MLX5_DPLL_PERIODIC_WORK_INTERVAL 500 /* ms */

	static void mlx5_dpll_periodic_work_queue(struct mlx5_dpll *mdpll)
	{
	queue_delayed_work(mdpll->wq, &mdpll->work,
	msecs_to_jiffies(MLX5_DPLL_PERIODIC_WORK_INTERVAL));
	}

	static void mlx5_dpll_periodic_work(struct work_struct *work)
	{
	struct mlx5_dpll *mdpll = container_of(work, struct mlx5_dpll,
	work.work);
	struct mlx5_dpll_synce_status synce_status;
	enum dpll_lock_status lock_status;
	enum dpll_pin_state pin_state;
	int err;

	err = mlx5_dpll_synce_status_get(mdpll->mdev, &synce_status);
	if (err)
	goto err_out;
	lock_status = mlx5_dpll_lock_status_get(&synce_status);
	pin_state = mlx5_dpll_pin_state_get(&synce_status);

	if (!mdpll->last.valid)
	goto invalid_out;

	if (mdpll->last.lock_status != lock_status)
	dpll_device_change_ntf(mdpll->dpll);
	if (mdpll->last.pin_state != pin_state)
	dpll_pin_change_ntf(mdpll->dpll_pin);

	invalid_out:
	mdpll->last.lock_status = lock_status;
	mdpll->last.pin_state = pin_state;
	mdpll->last.valid = true;
	err_out:
	mlx5_dpll_periodic_work_queue(mdpll);
	}

	static void mlx5_dpll_netdev_dpll_pin_set(struct mlx5_dpll *mdpll,
	struct net_device *netdev)
	{
	if (mdpll->tracking_netdev)
	return;
	dpll_netdev_pin_set(netdev, mdpll->dpll_pin);
	mdpll->tracking_netdev = netdev;
	}

	static void mlx5_dpll_netdev_dpll_pin_clear(struct mlx5_dpll *mdpll)
	{
	if (!mdpll->tracking_netdev)
	return;
	dpll_netdev_pin_clear(mdpll->tracking_netdev);
	mdpll->tracking_netdev = NULL;
	}

	static int mlx5_dpll_mdev_notifier_event(struct notifier_block *nb,
	unsigned long event, void *data)
	{
	struct mlx5_dpll *mdpll = container_of(nb, struct mlx5_dpll, mdev_nb);
	struct net_device *netdev = data;

	switch (event) {
	case MLX5_DRIVER_EVENT_UPLINK_NETDEV:
	if (netdev)
	mlx5_dpll_netdev_dpll_pin_set(mdpll, netdev);
	else
	mlx5_dpll_netdev_dpll_pin_clear(mdpll);
	break;
	default:
	return NOTIFY_DONE;
	}

	return NOTIFY_OK;
	}

	static void mlx5_dpll_mdev_netdev_track(struct mlx5_dpll *mdpll,
	struct mlx5_core_dev *mdev)
	{
	mdpll->mdev_nb.notifier_call = mlx5_dpll_mdev_notifier_event;
	mlx5_blocking_notifier_register(mdev, &mdpll->mdev_nb);
	mlx5_core_uplink_netdev_event_replay(mdev);
	}

	static void mlx5_dpll_mdev_netdev_untrack(struct mlx5_dpll *mdpll,
	struct mlx5_core_dev *mdev)
	{
	mlx5_blocking_notifier_unregister(mdev, &mdpll->mdev_nb);
	mlx5_dpll_netdev_dpll_pin_clear(mdpll);
	}

	static int mlx5_dpll_probe(struct auxiliary_device *adev,
	const struct auxiliary_device_id *id)
	{
	struct mlx5_adev *edev = container_of(adev, struct mlx5_adev, adev);
	struct mlx5_core_dev *mdev = edev->mdev;
	struct mlx5_dpll *mdpll;
	u64 clock_id;
	int err;

	err = mlx5_dpll_synce_status_set(mdev,
	MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
	if (err)
	return err;

	err = mlx5_dpll_clock_id_get(mdev, &clock_id);
	if (err)
	return err;

	mdpll = kzalloc(sizeof(*mdpll), GFP_KERNEL);
	if (!mdpll)
	return -ENOMEM;
	mdpll->mdev = mdev;
	auxiliary_set_drvdata(adev, mdpll);

	/* Multiple mdev instances might share one DPLL device. */
	mdpll->dpll = dpll_device_get(clock_id, 0, THIS_MODULE);
	if (IS_ERR(mdpll->dpll)) {
	err = PTR_ERR(mdpll->dpll);
	goto err_free_mdpll;
	}

	err = dpll_device_register(mdpll->dpll, DPLL_TYPE_EEC,
	&mlx5_dpll_device_ops, mdpll);
	if (err)
	goto err_put_dpll_device;

	/* Multiple mdev instances might share one DPLL pin. */
	mdpll->dpll_pin = dpll_pin_get(clock_id, mlx5_get_dev_index(mdev),
	THIS_MODULE, &mlx5_dpll_pin_properties);
	if (IS_ERR(mdpll->dpll_pin)) {
	err = PTR_ERR(mdpll->dpll_pin);
	goto err_unregister_dpll_device;
	}

	err = dpll_pin_register(mdpll->dpll, mdpll->dpll_pin,
	&mlx5_dpll_pins_ops, mdpll);
	if (err)
	goto err_put_dpll_pin;

	mdpll->wq = create_singlethread_workqueue("mlx5_dpll");
	if (!mdpll->wq) {
	err = -ENOMEM;
	goto err_unregister_dpll_pin;
	}

	mlx5_dpll_mdev_netdev_track(mdpll, mdev);

	INIT_DELAYED_WORK(&mdpll->work, &mlx5_dpll_periodic_work);
	mlx5_dpll_periodic_work_queue(mdpll);

	return 0;

	err_unregister_dpll_pin:
	dpll_pin_unregister(mdpll->dpll, mdpll->dpll_pin,
	&mlx5_dpll_pins_ops, mdpll);
	err_put_dpll_pin:
	dpll_pin_put(mdpll->dpll_pin);
	err_unregister_dpll_device:
	dpll_device_unregister(mdpll->dpll, &mlx5_dpll_device_ops, mdpll);
	err_put_dpll_device:
	dpll_device_put(mdpll->dpll);
	err_free_mdpll:
	kfree(mdpll);
	return err;
	}

	static void mlx5_dpll_remove(struct auxiliary_device *adev)
	{
	struct mlx5_dpll *mdpll = auxiliary_get_drvdata(adev);
	struct mlx5_core_dev *mdev = mdpll->mdev;

	cancel_delayed_work_sync(&mdpll->work);
	mlx5_dpll_mdev_netdev_untrack(mdpll, mdev);
	destroy_workqueue(mdpll->wq);
	dpll_pin_unregister(mdpll->dpll, mdpll->dpll_pin,
	&mlx5_dpll_pins_ops, mdpll);
	dpll_pin_put(mdpll->dpll_pin);
	dpll_device_unregister(mdpll->dpll, &mlx5_dpll_device_ops, mdpll);
	dpll_device_put(mdpll->dpll);
	kfree(mdpll);

	mlx5_dpll_synce_status_set(mdev,
	MLX5_MSEES_ADMIN_STATUS_FREE_RUNNING);
	}

	static int mlx5_dpll_suspend(struct auxiliary_device *adev, pm_message_t state)
	{
	return 0;
	}

	static int mlx5_dpll_resume(struct auxiliary_device *adev)
	{
	return 0;
	}

	static const struct auxiliary_device_id mlx5_dpll_id_table[] = {
	{ .name = MLX5_ADEV_NAME ".dpll", },
	{},
	};

	MODULE_DEVICE_TABLE(auxiliary, mlx5_dpll_id_table);

	static struct auxiliary_driver mlx5_dpll_driver = {
	.name = "dpll",
	.probe = mlx5_dpll_probe,
	.remove = mlx5_dpll_remove,
	.suspend = mlx5_dpll_suspend,
	.resume = mlx5_dpll_resume,
	.id_table = mlx5_dpll_id_table,
	};

	static int __init mlx5_dpll_init(void)
	{
	return auxiliary_driver_register(&mlx5_dpll_driver);
	}

	static void __exit mlx5_dpll_exit(void)
	{
	auxiliary_driver_unregister(&mlx5_dpll_driver);
	}

	module_init(mlx5_dpll_init);
	module_exit(mlx5_dpll_exit);

	MODULE_AUTHOR("Jiri Pirko <jiri@nvidia.com>");
	MODULE_DESCRIPTION("Mellanox 5th generation network adapters (ConnectX series) DPLL driver");
	MODULE_LICENSE("Dual BSD/GPL");