mr.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/mlx5/driver.h>
 35#include <linux/mlx5/qp.h>
 36#include "mlx5_core.h"
 37
 38int mlx5_core_create_mkey(struct mlx5_core_dev *dev, u32 *mkey, u32 *in,
 39			  int inlen)
 40{
 41	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
 42	u32 mkey_index;
 43	int err;
 44
 45	MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
 46
 47	err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
 48	if (err)
 49		return err;
 50
 51	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
 52	*mkey = MLX5_GET(create_mkey_in, in, memory_key_mkey_entry.mkey_7_0) |
 53		mlx5_idx_to_mkey(mkey_index);
 54
 55	mlx5_core_dbg(dev, "out 0x%x, mkey 0x%x\n", mkey_index, *mkey);
 56	return 0;
 57}
 58EXPORT_SYMBOL(mlx5_core_create_mkey);
 59
 60int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, u32 mkey)
 61{
 62	u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
 63
 64	MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
 65	MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
 66	return mlx5_cmd_exec_in(dev, destroy_mkey, in);
 67}
 68EXPORT_SYMBOL(mlx5_core_destroy_mkey);
 69
 70int mlx5_core_query_mkey(struct mlx5_core_dev *dev, u32 mkey, u32 *out,
 71			 int outlen)
 72{
 73	u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {};
 74
 75	memset(out, 0, outlen);
 76	MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
 77	MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
 78	return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
 79}
 80EXPORT_SYMBOL(mlx5_core_query_mkey);
 81
 82static inline u32 mlx5_get_psv(u32 *out, int psv_index)
 83{
 84	switch (psv_index) {
 85	case 1: return MLX5_GET(create_psv_out, out, psv1_index);
 86	case 2: return MLX5_GET(create_psv_out, out, psv2_index);
 87	case 3: return MLX5_GET(create_psv_out, out, psv3_index);
 88	default: return MLX5_GET(create_psv_out, out, psv0_index);
 89	}
 90}
 91
 92int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 93			 int npsvs, u32 *sig_index)
 94{
 95	u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {};
 96	u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {};
 97	int i, err;
 98
 99	if (npsvs > MLX5_MAX_PSVS)
100		return -EINVAL;
101
102	MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
103	MLX5_SET(create_psv_in, in, pd, pdn);
104	MLX5_SET(create_psv_in, in, num_psv, npsvs);
105
106	err = mlx5_cmd_exec_inout(dev, create_psv, in, out);
107	if (err)
108		return err;
109
110	for (i = 0; i < npsvs; i++)
111		sig_index[i] = mlx5_get_psv(out, i);
112
113	return err;
114}
115EXPORT_SYMBOL(mlx5_core_create_psv);
116
117int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
118{
119	u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {};
120
121	MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
122	MLX5_SET(destroy_psv_in, in, psvn, psv_num);
123	return mlx5_cmd_exec_in(dev, destroy_psv, in);
124}
125EXPORT_SYMBOL(mlx5_core_destroy_psv);
126
127__be32 mlx5_core_get_terminate_scatter_list_mkey(struct mlx5_core_dev *dev)
128{
129	u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
130	u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {};
131	u32 mkey;
132
133	if (!MLX5_CAP_GEN(dev, terminate_scatter_list_mkey))
134		return MLX5_TERMINATE_SCATTER_LIST_LKEY;
135
136	MLX5_SET(query_special_contexts_in, in, opcode,
137		 MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
138	if (mlx5_cmd_exec_inout(dev, query_special_contexts, in, out))
139		return MLX5_TERMINATE_SCATTER_LIST_LKEY;
140
141	mkey = MLX5_GET(query_special_contexts_out, out,
142			terminate_scatter_list_mkey);
143	return cpu_to_be32(mkey);
144}
145EXPORT_SYMBOL(mlx5_core_get_terminate_scatter_list_mkey);