LXR linux/drivers/net/ethernet/mellanox/mlx5/core/mad.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
  39int mlx5_core_mad_ifc(struct mlx5_core_dev *dev, const void *inb, void *outb,
  40                      u16 opmod, u8 port)
  41{
  42        int outlen = MLX5_ST_SZ_BYTES(mad_ifc_out);
  43        int inlen = MLX5_ST_SZ_BYTES(mad_ifc_in);
  44        int err = -ENOMEM;
  45        void *data;
  46        void *resp;
  47        u32 *out;
  48        u32 *in;
  49
  50        in = kzalloc(inlen, GFP_KERNEL);
  51        out = kzalloc(outlen, GFP_KERNEL);
  52        if (!in || !out)
  53                goto out;
  54
  55        MLX5_SET(mad_ifc_in, in, opcode, MLX5_CMD_OP_MAD_IFC);
  56        MLX5_SET(mad_ifc_in, in, op_mod, opmod);
  57        MLX5_SET(mad_ifc_in, in, port, port);
  58
  59        data = MLX5_ADDR_OF(mad_ifc_in, in, mad);
  60        memcpy(data, inb, MLX5_FLD_SZ_BYTES(mad_ifc_in, mad));
  61
  62        err = mlx5_cmd_exec(dev, in, inlen, out, outlen);
  63        if (err)
  64                goto out;
  65
  66        resp = MLX5_ADDR_OF(mad_ifc_out, out, response_mad_packet);
  67        memcpy(outb, resp,
  68               MLX5_FLD_SZ_BYTES(mad_ifc_out, response_mad_packet));
  69
  70out:
  71        kfree(out);
  72        kfree(in);
  73        return err;
  74}
  75EXPORT_SYMBOL_GPL(mlx5_core_mad_ifc);
  76