/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2020 Mellanox Technologies, Ltd
 */
#include <stdio.h>

#include <rte_errno.h>
#include <rte_ether.h>
#include <ethdev_driver.h>
#include <rte_interrupts.h>

#include <mlx5_glue.h>
#include <mlx5_devx_cmds.h>
#include <mlx5_common.h>
#include <mlx5_win_ext.h>
#include <mlx5_malloc.h>
#include <mlx5.h>
#include <mlx5_utils.h>

/**
 * Get MAC address by querying netdevice.
 *
 * @param[in] dev
 *   Pointer to Ethernet device.
 * @param[out] mac
 *   MAC address output buffer.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_get_mac(struct rte_eth_dev *dev, uint8_t (*mac)[RTE_ETHER_ADDR_LEN])
{
	struct mlx5_priv *priv;
	mlx5_context_st *context_obj;

	if (!dev) {
		rte_errno = EINVAL;
		return -rte_errno;
	}
	priv = dev->data->dev_private;
	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
	memcpy(mac, context_obj->mlx5_dev.eth_mac, RTE_ETHER_ADDR_LEN);
	return 0;
}

/**
 * Get interface name from private structure.
 *
 *
 * @param[in] dev
 *   Pointer to Ethernet device.
 * @param[out] ifname
 *   Interface name output buffer.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[MLX5_NAMESIZE])
{
	struct mlx5_priv *priv;
	mlx5_context_st *context_obj;

	if (!dev) {
		rte_errno = EINVAL;
		return -rte_errno;
	}
	priv = dev->data->dev_private;
	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
	strncpy(*ifname, context_obj->mlx5_dev.name, MLX5_NAMESIZE);
	return 0;
}

/**
 * Get device MTU.
 *
 * @param dev
 *   Pointer to Ethernet device.
 * @param[out] mtu
 *   MTU value output buffer.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
{
	struct mlx5_priv *priv;
	mlx5_context_st *context_obj;

	if (!dev) {
		rte_errno = EINVAL;
		return -rte_errno;
	}
	priv = dev->data->dev_private;
	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
	*mtu = context_obj->mlx5_dev.mtu_bytes;
	return 0;
}

/**
 * Set device MTU.
 *
 * @param dev
 *   Pointer to Ethernet device.
 * @param mtu
 *   MTU value to set.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(mtu);
	return -ENOTSUP;
}

/*
 * Unregister callback handler safely. The handler may be active
 * while we are trying to unregister it, in this case code -EAGAIN
 * is returned by rte_intr_callback_unregister(). This routine checks
 * the return code and tries to unregister handler again.
 *
 * @param handle
 *   interrupt handle
 * @param cb_fn
 *   pointer to callback routine
 * @cb_arg
 *   opaque callback parameter
 */
void
mlx5_intr_callback_unregister(const struct rte_intr_handle *handle,
			      rte_intr_callback_fn cb_fn, void *cb_arg)
{
	RTE_SET_USED(handle);
	RTE_SET_USED(cb_fn);
	RTE_SET_USED(cb_arg);
}

/**
 * DPDK callback to get flow control status.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] fc_conf
 *   Flow control output buffer.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(fc_conf);
	return -ENOTSUP;
}

/**
 * DPDK callback to modify flow control parameters.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[in] fc_conf
 *   Flow control parameters.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(fc_conf);
	return -ENOTSUP;
}

/**
 * Query the number of statistics provided by ETHTOOL.
 *
 * @param dev
 *   Pointer to Ethernet device.
 *
 * @return
 *   Number of statistics on success, negative errno value otherwise and
 *   rte_errno is set.
 */
int
mlx5_os_get_stats_n(struct rte_eth_dev *dev)
{
	RTE_SET_USED(dev);
	return -ENOTSUP;
}

/**
 * Init the structures to read device counters.
 *
 * @param dev
 *   Pointer to Ethernet device.
 */
void
mlx5_os_stats_init(struct rte_eth_dev *dev)
{
	RTE_SET_USED(dev);
}

/**
 * Read device counters table.
 *
 * @param dev
 *   Pointer to Ethernet device.
 * @param[out] stats
 *   Counters table output buffer.
 *
 * @return
 *   0 on success and stats is filled, negative errno value otherwise and
 *   rte_errno is set.
 */
int
mlx5_os_read_dev_counters(struct rte_eth_dev *dev, uint64_t *stats)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(stats);
	return -ENOTSUP;
}

/**
 * DPDK callback to retrieve physical link information.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion.
 *
 * @return
 *   0 if link status was not updated, positive if it was, a negative errno
 *   value otherwise and rte_errno is set.
 */
int
mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
{
	RTE_SET_USED(wait_to_complete);
	struct mlx5_priv *priv;
	mlx5_context_st *context_obj;
	struct rte_eth_link dev_link;
	int ret;

	ret = 0;
	if (!dev) {
		rte_errno = EINVAL;
		return -rte_errno;
	}
	priv = dev->data->dev_private;
	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1000 * 1000);
	dev_link.link_status =
	      (context_obj->mlx5_dev.link_state == 1 && !mlx5_is_removed(dev))
	      ? 1 : 0;
	dev_link.link_duplex = 1;
	if (dev->data->dev_link.link_speed != dev_link.link_speed ||
	    dev->data->dev_link.link_duplex != dev_link.link_duplex ||
	    dev->data->dev_link.link_autoneg != dev_link.link_autoneg ||
	    dev->data->dev_link.link_status != dev_link.link_status)
		ret = 1;
	else
		ret = 0;
	dev->data->dev_link = dev_link;
	return ret;
}

/**
 * DPDK callback to bring the link DOWN.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, a negative errno value otherwise
 */
int
mlx5_set_link_down(struct rte_eth_dev *dev)
{
	RTE_SET_USED(dev);
	return -ENOTSUP;
}

/**
 * DPDK callback to bring the link UP.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, a negative errno value otherwise
 */
int
mlx5_set_link_up(struct rte_eth_dev *dev)
{
	RTE_SET_USED(dev);
	return -ENOTSUP;
}

/**
 * DPDK callback to retrieve plug-in module EEPROM information (type and size).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] modinfo
 *   Storage for plug-in module EEPROM information.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_get_module_info(struct rte_eth_dev *dev,
		     struct rte_eth_dev_module_info *modinfo)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(modinfo);
	return -ENOTSUP;
}

/**
 * DPDK callback to retrieve plug-in module EEPROM data.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] info
 *   Storage for plug-in module EEPROM data.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int mlx5_get_module_eeprom(struct rte_eth_dev *dev,
			   struct rte_dev_eeprom_info *info)
{
	RTE_SET_USED(dev);
	RTE_SET_USED(info);
	return -ENOTSUP;
}

/**
 * Get device current raw clock counter
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] time
 *   Current raw clock counter of the device.
 *
 * @return
 *   0 if the clock has correctly been read
 *   The value of errno in case of error
 */
int
mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock)
{
	int err;
	struct mlx5_devx_clock mlx5_clock;
	struct mlx5_priv *priv = dev->data->dev_private;
	mlx5_context_st *context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;

	err = mlx5_glue->query_rt_values(context_obj, &mlx5_clock);
	if (err != 0) {
		DRV_LOG(WARNING, "Could not query the clock");
		return err;
	}
	*clock = *(uint64_t volatile *)mlx5_clock.p_iseg_internal_timer;
	return 0;
}

/**
 * Check if mlx5 device was removed.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   1 when device is removed, otherwise 0.
 */
int
mlx5_is_removed(struct rte_eth_dev *dev)
{
	struct mlx5_priv *priv = dev->data->dev_private;
	mlx5_context_st *context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;

	if (*context_obj->shutdown_event_obj.p_flag)
		return 1;
	return 0;
}

/*
 * Query dropless_rq private flag value provided by ETHTOOL.
 *
 * @param dev
 *   Pointer to Ethernet device.
 *
 * @return
 *   - 0 on success, flag is not set.
 *   - 1 on success, flag is set.
 *   - negative errno value otherwise and rte_errno is set.
 */
int mlx5_get_flag_dropless_rq(struct rte_eth_dev *dev)
{
	RTE_SET_USED(dev);
	return -ENOTSUP;
}