text: /*
   * Copyright (c) 2013, Mellanox Technologies inc.  All rights reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/mlx5/driver.h>
  #include <linux/mlx5/cmd.h>
  #include <rdma/ib_verbs.h>
  #include "mlx5_core.h"
  
  struct mlx5_attach_mcg_mbox_in {
  	struct mlx5_inbox_hdr	hdr;
  	__be32			qpn;
  	__be32			rsvd;
  	u8			gid[16];
  };
  
  struct mlx5_attach_mcg_mbox_out {
  	struct mlx5_outbox_hdr	hdr;
  	u8			rsvf[8];
  };
  
  struct mlx5_detach_mcg_mbox_in {
  	struct mlx5_inbox_hdr	hdr;
  	__be32			qpn;
  	__be32			rsvd;
  	u8			gid[16];
  };
  
  struct mlx5_detach_mcg_mbox_out {
  	struct mlx5_outbox_hdr	hdr;
  	u8			rsvf[8];
  };
  
  int mlx5_core_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn)
  {
  	struct mlx5_attach_mcg_mbox_in in;
  	struct mlx5_attach_mcg_mbox_out out;
  	int err;
  
  	memset(&in, 0, sizeof(in));
  	memset(&out, 0, sizeof(out));
  	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ATTACH_TO_MCG);
  	memcpy(in.gid, mgid, sizeof(*mgid));
  	in.qpn = cpu_to_be32(qpn);
  	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  	if (err)
  		return err;
  
  	if (out.hdr.status)
  		err = mlx5_cmd_status_to_err(&out.hdr);
  
  	return err;
  }
  EXPORT_SYMBOL(mlx5_core_attach_mcg);
  
  int mlx5_core_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn)
  {
  	struct mlx5_detach_mcg_mbox_in in;
  	struct mlx5_detach_mcg_mbox_out out;
  	int err;
  
  	memset(&in, 0, sizeof(in));
  	memset(&out, 0, sizeof(out));
  	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DETACH_FROM_MCG);
  	memcpy(in.gid, mgid, sizeof(*mgid));
  	in.qpn = cpu_to_be32(qpn);
  	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  	if (err)
  		return err;
  
  	if (out.hdr.status)
  		err = mlx5_cmd_status_to_err(&out.hdr);
  
  	return err;
  }
  EXPORT_SYMBOL(mlx5_core_detach_mcg);
  