drivers/net/ethernet/mellanox/mlx5/core/pd.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 "mlx5_core.h"
  38
  39 struct mlx5_alloc_pd_mbox_in {
  40         struct mlx5_inbox_hdr   hdr;
  41         u8                      rsvd[8];
  42 };
  43
  44 struct mlx5_alloc_pd_mbox_out {
  45         struct mlx5_outbox_hdr  hdr;
  46         __be32                  pdn;
  47         u8                      rsvd[4];
  48 };
  49
  50 struct mlx5_dealloc_pd_mbox_in {
  51         struct mlx5_inbox_hdr   hdr;
  52         __be32                  pdn;
  53         u8                      rsvd[4];
  54 };
  55
  56 struct mlx5_dealloc_pd_mbox_out {
  57         struct mlx5_outbox_hdr  hdr;
  58         u8                      rsvd[8];
  59 };
  60
  61 int mlx5_core_alloc_pd(struct mlx5_core_dev *dev, u32 *pdn)
  62 {
  63         struct mlx5_alloc_pd_mbox_in    in;
  64         struct mlx5_alloc_pd_mbox_out   out;
  65         int err;
  66
  67         memset(&in, 0, sizeof(in));
  68         memset(&out, 0, sizeof(out));
  69         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_PD);
  70         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  71         if (err)
  72                 return err;
  73
  74         if (out.hdr.status)
  75                 return mlx5_cmd_status_to_err(&out.hdr);
  76
  77         *pdn = be32_to_cpu(out.pdn) & 0xffffff;
  78         return err;
  79 }
  80 EXPORT_SYMBOL(mlx5_core_alloc_pd);
  81
  82 int mlx5_core_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn)
  83 {
  84         struct mlx5_dealloc_pd_mbox_in  in;
  85         struct mlx5_dealloc_pd_mbox_out out;
  86         int err;
  87
  88         memset(&in, 0, sizeof(in));
  89         memset(&out, 0, sizeof(out));
  90         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_PD);
  91         in.pdn = cpu_to_be32(pdn);
  92         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
  93         if (err)
  94                 return err;
  95
  96         if (out.hdr.status)
  97                 return mlx5_cmd_status_to_err(&out.hdr);
  98
  99         return err;
 100 }
 101 EXPORT_SYMBOL(mlx5_core_dealloc_pd);