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
mlx5_init_mkey_table(struct mlx5_core_dev * dev)39 void mlx5_init_mkey_table(struct mlx5_core_dev *dev)
40 {
41 struct mlx5_mkey_table *table = &dev->priv.mkey_table;
42
43 memset(table, 0, sizeof(*table));
44 rwlock_init(&table->lock);
45 INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
46 }
47
mlx5_cleanup_mkey_table(struct mlx5_core_dev * dev)48 void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev)
49 {
50 }
51
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)52 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
53 struct mlx5_core_mkey *mkey,
54 u32 *in, int inlen,
55 u32 *out, int outlen,
56 mlx5_cmd_cbk_t callback, void *context)
57 {
58 struct mlx5_mkey_table *table = &dev->priv.mkey_table;
59 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0};
60 u32 mkey_index;
61 void *mkc;
62 int err;
63 u8 key;
64
65 spin_lock_irq(&dev->priv.mkey_lock);
66 key = dev->priv.mkey_key++;
67 spin_unlock_irq(&dev->priv.mkey_lock);
68 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
69
70 MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
71 MLX5_SET(mkc, mkc, mkey_7_0, key);
72
73 if (callback)
74 return mlx5_cmd_exec_cb(dev, in, inlen, out, outlen,
75 callback, context);
76
77 err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
78 if (err)
79 return err;
80
81 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
82 mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
83 mkey->size = MLX5_GET64(mkc, mkc, len);
84 mkey->key = mlx5_idx_to_mkey(mkey_index) | key;
85 mkey->pd = MLX5_GET(mkc, mkc, pd);
86
87 mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
88 mkey_index, key, mkey->key);
89
90 /* connect to mkey tree */
91 write_lock_irq(&table->lock);
92 err = radix_tree_insert(&table->tree, mlx5_base_mkey(mkey->key), mkey);
93 write_unlock_irq(&table->lock);
94 if (err) {
95 mlx5_core_warn(dev, "failed radix tree insert of mkey 0x%x, %d\n",
96 mlx5_base_mkey(mkey->key), err);
97 mlx5_core_destroy_mkey(dev, mkey);
98 }
99
100 return err;
101 }
102 EXPORT_SYMBOL(mlx5_core_create_mkey_cb);
103
mlx5_core_create_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mkey * mkey,u32 * in,int inlen)104 int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
105 struct mlx5_core_mkey *mkey,
106 u32 *in, int inlen)
107 {
108 return mlx5_core_create_mkey_cb(dev, mkey, in, inlen,
109 NULL, 0, NULL, NULL);
110 }
111 EXPORT_SYMBOL(mlx5_core_create_mkey);
112
mlx5_core_destroy_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mkey * mkey)113 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev,
114 struct mlx5_core_mkey *mkey)
115 {
116 struct mlx5_mkey_table *table = &dev->priv.mkey_table;
117 u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0};
118 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {0};
119 struct mlx5_core_mkey *deleted_mkey;
120 unsigned long flags;
121
122 write_lock_irqsave(&table->lock, flags);
123 deleted_mkey = radix_tree_delete(&table->tree, mlx5_base_mkey(mkey->key));
124 write_unlock_irqrestore(&table->lock, flags);
125 if (!deleted_mkey) {
126 mlx5_core_dbg(dev, "failed radix tree delete of mkey 0x%x\n",
127 mlx5_base_mkey(mkey->key));
128 return -ENOENT;
129 }
130
131 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
132 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
133 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
134 }
135 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
136
mlx5_core_query_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mkey * mkey,u32 * out,int outlen)137 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey,
138 u32 *out, int outlen)
139 {
140 u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {0};
141
142 memset(out, 0, outlen);
143 MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
144 MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
145 return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
146 }
147 EXPORT_SYMBOL(mlx5_core_query_mkey);
148
mlx5_get_psv(u32 * out,int psv_index)149 static inline u32 mlx5_get_psv(u32 *out, int psv_index)
150 {
151 switch (psv_index) {
152 case 1: return MLX5_GET(create_psv_out, out, psv1_index);
153 case 2: return MLX5_GET(create_psv_out, out, psv2_index);
154 case 3: return MLX5_GET(create_psv_out, out, psv3_index);
155 default: return MLX5_GET(create_psv_out, out, psv0_index);
156 }
157 }
158
mlx5_core_create_psv(struct mlx5_core_dev * dev,u32 pdn,int npsvs,u32 * sig_index)159 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
160 int npsvs, u32 *sig_index)
161 {
162 u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0};
163 u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {0};
164 int i, err;
165
166 if (npsvs > MLX5_MAX_PSVS)
167 return -EINVAL;
168
169 MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
170 MLX5_SET(create_psv_in, in, pd, pdn);
171 MLX5_SET(create_psv_in, in, num_psv, npsvs);
172
173 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
174 if (err)
175 return err;
176
177 for (i = 0; i < npsvs; i++)
178 sig_index[i] = mlx5_get_psv(out, i);
179
180 return err;
181 }
182 EXPORT_SYMBOL(mlx5_core_create_psv);
183
mlx5_core_destroy_psv(struct mlx5_core_dev * dev,int psv_num)184 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
185 {
186 u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0};
187 u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {0};
188
189 MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
190 MLX5_SET(destroy_psv_in, in, psvn, psv_num);
191 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
192 }
193 EXPORT_SYMBOL(mlx5_core_destroy_psv);
194
