mlx5_mad.c revision 337115 
1/*-
2 * Copyright (c) 2013-2017, Mellanox Technologies, Ltd.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: stable/11/sys/dev/mlx5/mlx5_core/mlx5_mad.c 337115 2018-08-02 08:56:27Z hselasky $
26 */
27
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <dev/mlx5/driver.h>
31#include "mlx5_core.h"
32
33int mlx5_core_mad_ifc(struct mlx5_core_dev *dev, const void *inb, void *outb,
34		      u16 opmod, u8 port)
35{
36	int outlen = MLX5_ST_SZ_BYTES(mad_ifc_out);
37	int inlen = MLX5_ST_SZ_BYTES(mad_ifc_in);
38	int err = -ENOMEM;
39	void *data;
40	void *resp;
41	u32 *out;
42	u32 *in;
43
44	in = kzalloc(inlen, GFP_KERNEL);
45	out = kzalloc(outlen, GFP_KERNEL);
46	if (!in || !out)
47		goto out;
48
49	MLX5_SET(mad_ifc_in, in, opcode, MLX5_CMD_OP_MAD_IFC);
50	MLX5_SET(mad_ifc_in, in, op_mod, opmod);
51	MLX5_SET(mad_ifc_in, in, port, port);
52
53	data = MLX5_ADDR_OF(mad_ifc_in, in, mad);
54	memcpy(data, inb, MLX5_FLD_SZ_BYTES(mad_ifc_in, mad));
55
56	err = mlx5_cmd_exec(dev, in, inlen, out, outlen);
57	if (err)
58		goto out;
59
60	resp = MLX5_ADDR_OF(mad_ifc_out, out, response_mad_packet);
61	memcpy(outb, resp,
62	       MLX5_FLD_SZ_BYTES(mad_ifc_out, response_mad_packet));
63
64out:
65	kfree(out);
66	kfree(in);
67	return err;
68}
69EXPORT_SYMBOL_GPL(mlx5_core_mad_ifc);
70