summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mellanox/mlx5/core/mr.c
blob: 0670165afd5fda40aaf1f0a9dc54e570210f9739 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/cmd.h>
#include "mlx5_core.h"

void mlx5_init_mkey_table(struct mlx5_core_dev *dev)
{
	struct mlx5_mkey_table *table = &dev->priv.mkey_table;

	memset(table, 0, sizeof(*table));
	rwlock_init(&table->lock);
	INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
}

void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev)
{
}

int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
			     struct mlx5_core_mkey *mkey,
			     u32 *in, int inlen,
			     u32 *out, int outlen,
			     mlx5_cmd_cbk_t callback, void *context)
{
	struct mlx5_mkey_table *table = &dev->priv.mkey_table;
	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0};
	u32 mkey_index;
	void *mkc;
	int err;
	u8 key;

	spin_lock_irq(&dev->priv.mkey_lock);
	key = dev->priv.mkey_key++;
	spin_unlock_irq(&dev->priv.mkey_lock);
	mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);

	MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
	MLX5_SET(mkc, mkc, mkey_7_0, key);

	if (callback)
		return mlx5_cmd_exec_cb(dev, in, inlen, out, outlen,
					callback, context);

	err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
	if (err)
		return err;

	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
	mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
	mkey->size = MLX5_GET64(mkc, mkc, len);
	mkey->key = mlx5_idx_to_mkey(mkey_index) | key;
	mkey->pd = MLX5_GET(mkc, mkc, pd);

	mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
		      mkey_index, key, mkey->key);

	/* connect to mkey tree */
	write_lock_irq(&table->lock);
	err = radix_tree_insert(&table->tree, mlx5_base_mkey(mkey->key), mkey);
	write_unlock_irq(&table->lock);
	if (err) {
		mlx5_core_warn(dev, "failed radix tree insert of mkey 0x%x, %d\n",
			       mlx5_base_mkey(mkey->key), err);
		mlx5_core_destroy_mkey(dev, mkey);
	}

	return err;
}
EXPORT_SYMBOL(mlx5_core_create_mkey_cb);

int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
			  struct mlx5_core_mkey *mkey,
			  u32 *in, int inlen)
{
	return mlx5_core_create_mkey_cb(dev, mkey, in, inlen,
					NULL, 0, NULL, NULL);
}
EXPORT_SYMBOL(mlx5_core_create_mkey);

int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev,
			   struct mlx5_core_mkey *mkey)
{
	struct mlx5_mkey_table *table = &dev->priv.mkey_table;
	u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0};
	u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)]   = {0};
	struct mlx5_core_mkey *deleted_mkey;
	unsigned long flags;

	write_lock_irqsave(&table->lock, flags);
	deleted_mkey = radix_tree_delete(&table->tree, mlx5_base_mkey(mkey->key));
	write_unlock_irqrestore(&table->lock, flags);
	if (!deleted_mkey) {
		mlx5_core_dbg(dev, "failed radix tree delete of mkey 0x%x\n",
			      mlx5_base_mkey(mkey->key));
		return -ENOENT;
	}

	MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
	MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
}
EXPORT_SYMBOL(mlx5_core_destroy_mkey);

int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey,
			 u32 *out, int outlen)
{
	u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {0};

	memset(out, 0, outlen);
	MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
	MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
	return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
}
EXPORT_SYMBOL(mlx5_core_query_mkey);

static inline u32 mlx5_get_psv(u32 *out, int psv_index)
{
	switch (psv_index) {
	case 1: return MLX5_GET(create_psv_out, out, psv1_index);
	case 2: return MLX5_GET(create_psv_out, out, psv2_index);
	case 3: return MLX5_GET(create_psv_out, out, psv3_index);
	default: return MLX5_GET(create_psv_out, out, psv0_index);
	}
}

int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
			 int npsvs, u32 *sig_index)
{
	u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0};
	u32 in[MLX5_ST_SZ_DW(create_psv_in)]   = {0};
	int i, err;

	if (npsvs > MLX5_MAX_PSVS)
		return -EINVAL;

	MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
	MLX5_SET(create_psv_in, in, pd, pdn);
	MLX5_SET(create_psv_in, in, num_psv, npsvs);

	err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
	if (err)
		return err;

	for (i = 0; i < npsvs; i++)
		sig_index[i] = mlx5_get_psv(out, i);

	return err;
}
EXPORT_SYMBOL(mlx5_core_create_psv);

int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
{
	u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0};
	u32 in[MLX5_ST_SZ_DW(destroy_psv_in)]   = {0};

	MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
	MLX5_SET(destroy_psv_in, in, psvn, psv_num);
	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
}
EXPORT_SYMBOL(mlx5_core_destroy_psv);