1/*
  2 * Copyright (c) 2013, Mellanox Technologies inc.  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		 int 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.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}