drivers/infiniband/hw/mlx5/mad.c

   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
  38 enum {
  39         MLX5_IB_VENDOR_CLASS1 = 0x9,
  40         MLX5_IB_VENDOR_CLASS2 = 0xa
  41 };
  42
  43 int 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
  60 int 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
 112 int 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
 135 out:
 136         kfree(in_mad);
 137         kfree(out_mad);
 138         return err;
 139 }