1/*
2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/module.h>
34#include <linux/mlx5/driver.h>
35#include <linux/mlx5/cmd.h>
36#include "mlx5_core.h"
37
38int mlx5_core_access_reg(struct mlx5_core_dev *dev, void *data_in,
39			 int size_in, void *data_out, int size_out,
40			 u16 reg_num, int arg, int write)
41{
42	struct mlx5_access_reg_mbox_in *in = NULL;
43	struct mlx5_access_reg_mbox_out *out = NULL;
44	int err = -ENOMEM;
45
46	in = mlx5_vzalloc(sizeof(*in) + size_in);
47	if (!in)
48		return -ENOMEM;
49
50	out = mlx5_vzalloc(sizeof(*out) + size_out);
51	if (!out)
52		goto ex1;
53
54	memcpy(in->data, data_in, size_in);
55	in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ACCESS_REG);
56	in->hdr.opmod = cpu_to_be16(!write);
57	in->arg = cpu_to_be32(arg);
58	in->register_id = cpu_to_be16(reg_num);
59	err = mlx5_cmd_exec(dev, in, sizeof(*in) + size_in, out,
60			    sizeof(*out) + size_out);
61	if (err)
62		goto ex2;
63
64	if (out->hdr.status)
65		err = mlx5_cmd_status_to_err(&out->hdr);
66
67	if (!err)
68		memcpy(data_out, out->data, size_out);
69
70ex2:
71	kvfree(out);
72ex1:
73	kvfree(in);
74	return err;
75}
76EXPORT_SYMBOL_GPL(mlx5_core_access_reg);
77
78
79struct mlx5_reg_pcap {
80	u8			rsvd0;
81	u8			port_num;
82	u8			rsvd1[2];
83	__be32			caps_127_96;
84	__be32			caps_95_64;
85	__be32			caps_63_32;
86	__be32			caps_31_0;
87};
88
89int mlx5_set_port_caps(struct mlx5_core_dev *dev, u8 port_num, u32 caps)
90{
91	struct mlx5_reg_pcap in;
92	struct mlx5_reg_pcap out;
93	int err;
94
95	memset(&in, 0, sizeof(in));
96	in.caps_127_96 = cpu_to_be32(caps);
97	in.port_num = port_num;
98
99	err = mlx5_core_access_reg(dev, &in, sizeof(in), &out,
100				   sizeof(out), MLX5_REG_PCAP, 0, 1);
101
102	return err;
103}
104EXPORT_SYMBOL_GPL(mlx5_set_port_caps);
105