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/mlx5/cmd.h>
34#include <rdma/ib_mad.h>
35#include <rdma/ib_smi.h>
36#include "mlx5_ib.h"
37
38enum {
39	MLX5_IB_VENDOR_CLASS1 = 0x9,
40	MLX5_IB_VENDOR_CLASS2 = 0xa
41};
42
43int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey, int ignore_bkey,
44		 u8 port, struct ib_wc *in_wc, struct ib_grh *in_grh,
45		 void *in_mad, void *response_mad)
46{
47	u8 op_modifier = 0;
48
49	/* Key check traps can't be generated unless we have in_wc to
50	 * tell us where to send the trap.
51	 */
52	if (ignore_mkey || !in_wc)
53		op_modifier |= 0x1;
54	if (ignore_bkey || !in_wc)
55		op_modifier |= 0x2;
56
57	return mlx5_core_mad_ifc(dev->mdev, in_mad, response_mad, op_modifier, port);
58}
59
60int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
61			struct ib_wc *in_wc, struct ib_grh *in_grh,
62			struct ib_mad *in_mad, struct ib_mad *out_mad)
63{
64	u16 slid;
65	int err;
66
67	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
68
69	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
70		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
71
72	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
73	    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
74		if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
75		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
76		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
77			return IB_MAD_RESULT_SUCCESS;
78
79		/* Don't process SMInfo queries -- the SMA can't handle them.
80		 */
81		if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
82			return IB_MAD_RESULT_SUCCESS;
83	} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
84		   in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS1   ||
85		   in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS2   ||
86		   in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
87		if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
88		    in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
89			return IB_MAD_RESULT_SUCCESS;
90	} else {
91		return IB_MAD_RESULT_SUCCESS;
92	}
93
94	err = mlx5_MAD_IFC(to_mdev(ibdev),
95			   mad_flags & IB_MAD_IGNORE_MKEY,
96			   mad_flags & IB_MAD_IGNORE_BKEY,
97			   port_num, in_wc, in_grh, in_mad, out_mad);
98	if (err)
99		return IB_MAD_RESULT_FAILURE;
100
101	/* set return bit in status of directed route responses */
102	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
103		out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
104
105	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
106		/* no response for trap repress */
107		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
108
109	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
110}
111
112int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port)
113{
114	struct ib_smp *in_mad  = NULL;
115	struct ib_smp *out_mad = NULL;
116	int err = -ENOMEM;
117	u16 packet_error;
118
119	in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
120	out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
121	if (!in_mad || !out_mad)
122		goto out;
123
124	init_query_mad(in_mad);
125	in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
126	in_mad->attr_mod = cpu_to_be32(port);
127
128	err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
129
130	packet_error = be16_to_cpu(out_mad->status);
131
132	dev->mdev->caps.gen.ext_port_cap[port - 1] = (!err && !packet_error) ?
133		MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0;
134
135out:
136	kfree(in_mad);
137	kfree(out_mad);
138	return err;
139}
140