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
  39 int 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
  70 out:
  71         kfree(out);
  72         kfree(in);
  73         return err;
  74 }
  75 EXPORT_SYMBOL_GPL(mlx5_core_mad_ifc);