cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mr.c (4069B)

      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/mlx5/driver.h>
     35#include "mlx5_core.h"
     36
     37int mlx5_core_create_mkey(struct mlx5_core_dev *dev, u32 *mkey, u32 *in,
     38			  int inlen)
     39{
     40	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
     41	u32 mkey_index;
     42	int err;
     43
     44	MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
     45
     46	err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
     47	if (err)
     48		return err;
     49
     50	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
     51	*mkey = MLX5_GET(create_mkey_in, in, memory_key_mkey_entry.mkey_7_0) |
     52		mlx5_idx_to_mkey(mkey_index);
     53
     54	mlx5_core_dbg(dev, "out 0x%x, mkey 0x%x\n", mkey_index, *mkey);
     55	return 0;
     56}
     57EXPORT_SYMBOL(mlx5_core_create_mkey);
     58
     59int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, u32 mkey)
     60{
     61	u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
     62
     63	MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
     64	MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
     65	return mlx5_cmd_exec_in(dev, destroy_mkey, in);
     66}
     67EXPORT_SYMBOL(mlx5_core_destroy_mkey);
     68
     69int mlx5_core_query_mkey(struct mlx5_core_dev *dev, u32 mkey, u32 *out,
     70			 int outlen)
     71{
     72	u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {};
     73
     74	memset(out, 0, outlen);
     75	MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
     76	MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
     77	return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
     78}
     79EXPORT_SYMBOL(mlx5_core_query_mkey);
     80
     81static inline u32 mlx5_get_psv(u32 *out, int psv_index)
     82{
     83	switch (psv_index) {
     84	case 1: return MLX5_GET(create_psv_out, out, psv1_index);
     85	case 2: return MLX5_GET(create_psv_out, out, psv2_index);
     86	case 3: return MLX5_GET(create_psv_out, out, psv3_index);
     87	default: return MLX5_GET(create_psv_out, out, psv0_index);
     88	}
     89}
     90
     91int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
     92			 int npsvs, u32 *sig_index)
     93{
     94	u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {};
     95	u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {};
     96	int i, err;
     97
     98	if (npsvs > MLX5_MAX_PSVS)
     99		return -EINVAL;
    100
    101	MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
    102	MLX5_SET(create_psv_in, in, pd, pdn);
    103	MLX5_SET(create_psv_in, in, num_psv, npsvs);
    104
    105	err = mlx5_cmd_exec_inout(dev, create_psv, in, out);
    106	if (err)
    107		return err;
    108
    109	for (i = 0; i < npsvs; i++)
    110		sig_index[i] = mlx5_get_psv(out, i);
    111
    112	return err;
    113}
    114EXPORT_SYMBOL(mlx5_core_create_psv);
    115
    116int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
    117{
    118	u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {};
    119
    120	MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
    121	MLX5_SET(destroy_psv_in, in, psvn, psv_num);
    122	return mlx5_cmd_exec_in(dev, destroy_psv, in);
    123}
    124EXPORT_SYMBOL(mlx5_core_destroy_psv);