LXR linux/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
  39struct mlx5_alloc_pd_mbox_in {
  40        struct mlx5_inbox_hdr   hdr;
  41        u8                      rsvd[8];
  42};
  43
  44struct mlx5_alloc_pd_mbox_out {
  45        struct mlx5_outbox_hdr  hdr;
  46        __be32                  pdn;
  47        u8                      rsvd[4];
  48};
  49
  50struct mlx5_dealloc_pd_mbox_in {
  51        struct mlx5_inbox_hdr   hdr;
  52        __be32                  pdn;
  53        u8                      rsvd[4];
  54};
  55
  56struct mlx5_dealloc_pd_mbox_out {
  57        struct mlx5_outbox_hdr  hdr;
  58        u8                      rsvd[8];
  59};
  60
  61int 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}
  80EXPORT_SYMBOL(mlx5_core_alloc_pd);
  81
  82int 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}
 101EXPORT_SYMBOL(mlx5_core_dealloc_pd);
 102