drivers/net/ethernet/mellanox/mlx5/core/mcg.c

   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/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/mlx5/driver.h>
  36 #include <linux/mlx5/cmd.h>
  37 #include <rdma/ib_verbs.h>
  38 #include "mlx5_core.h"
  39
  40 struct mlx5_attach_mcg_mbox_in {
  41         struct mlx5_inbox_hdr   hdr;
  42         __be32                  qpn;
  43         __be32                  rsvd;
  44         u8                      gid[16];
  45 };
  46
  47 struct mlx5_attach_mcg_mbox_out {
  48         struct mlx5_outbox_hdr  hdr;
  49         u8                      rsvf[8];
  50 };
  51
  52 struct mlx5_detach_mcg_mbox_in {
  53         struct mlx5_inbox_hdr   hdr;
  54         __be32                  qpn;
  55         __be32                  rsvd;
  56         u8                      gid[16];
  57 };
  58
  59 struct mlx5_detach_mcg_mbox_out {
  60         struct mlx5_outbox_hdr  hdr;
  61         u8                      rsvf[8];
  62 };
  63
  64 int mlx5_core_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn)
  65 {
  66         struct mlx5_attach_mcg_mbox_in in;
  67         struct mlx5_attach_mcg_mbox_out out;
  68         int err;
  69
  70         memset(&in, 0, sizeof(in));
  71         memset(&out, 0, sizeof(out));
  72         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ATTACH_TO_MCG);
  73         memcpy(in.gid, mgid, sizeof(*mgid));
  74         in.qpn = cpu_to_be32(qpn);
  75         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  76         if (err)
  77                 return err;
  78
  79         if (out.hdr.status)
  80                 err = mlx5_cmd_status_to_err(&out.hdr);
  81
  82         return err;
  83 }
  84 EXPORT_SYMBOL(mlx5_core_attach_mcg);
  85
  86 int mlx5_core_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn)
  87 {
  88         struct mlx5_detach_mcg_mbox_in in;
  89         struct mlx5_detach_mcg_mbox_out out;
  90         int err;
  91
  92         memset(&in, 0, sizeof(in));
  93         memset(&out, 0, sizeof(out));
  94         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DETACH_FROM_MCG);
  95         memcpy(in.gid, mgid, sizeof(*mgid));
  96         in.qpn = cpu_to_be32(qpn);
  97         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  98         if (err)
  99                 return err;
 100
 101         if (out.hdr.status)
 102                 err = mlx5_cmd_status_to_err(&out.hdr);
 103
 104         return err;
 105 }
 106 EXPORT_SYMBOL(mlx5_core_detach_mcg);