/*-
 * Copyright (c) 2013-2017, Mellanox Technologies, Ltd.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: stable/11/sys/dev/mlx5/mlx5_core/mlx5_mad.c 337115 2018-08-02 08:56:27Z hselasky $
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <dev/mlx5/driver.h>
#include "mlx5_core.h"

int mlx5_core_mad_ifc(struct mlx5_core_dev *dev, const void *inb, void *outb,
		      u16 opmod, u8 port)
{
	int outlen = MLX5_ST_SZ_BYTES(mad_ifc_out);
	int inlen = MLX5_ST_SZ_BYTES(mad_ifc_in);
	int err = -ENOMEM;
	void *data;
	void *resp;
	u32 *out;
	u32 *in;

	in = kzalloc(inlen, GFP_KERNEL);
	out = kzalloc(outlen, GFP_KERNEL);
	if (!in || !out)
		goto out;

	MLX5_SET(mad_ifc_in, in, opcode, MLX5_CMD_OP_MAD_IFC);
	MLX5_SET(mad_ifc_in, in, op_mod, opmod);
	MLX5_SET(mad_ifc_in, in, port, port);

	data = MLX5_ADDR_OF(mad_ifc_in, in, mad);
	memcpy(data, inb, MLX5_FLD_SZ_BYTES(mad_ifc_in, mad));

	err = mlx5_cmd_exec(dev, in, inlen, out, outlen);
	if (err)
		goto out;

	resp = MLX5_ADDR_OF(mad_ifc_out, out, response_mad_packet);
	memcpy(outb, resp,
	       MLX5_FLD_SZ_BYTES(mad_ifc_out, response_mad_packet));

out:
	kfree(out);
	kfree(in);
	return err;
}
EXPORT_SYMBOL_GPL(mlx5_core_mad_ifc);