1 /*-
2 * Copyright (c) 2013-2018, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <dev/mlx5/driver.h>
31 #include "mlx5_core.h"
32
33 static int mlx5_relaxed_ordering_write;
34 SYSCTL_INT(_hw_mlx5, OID_AUTO, relaxed_ordering_write, CTLFLAG_RWTUN,
35 &mlx5_relaxed_ordering_write, 0,
36 "Set to enable relaxed ordering for PCIe writes");
37
mlx5_init_mr_table(struct mlx5_core_dev * dev)38 void mlx5_init_mr_table(struct mlx5_core_dev *dev)
39 {
40 struct mlx5_mr_table *table = &dev->priv.mr_table;
41
42 memset(table, 0, sizeof(*table));
43 spin_lock_init(&table->lock);
44 INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
45 }
46
mlx5_cleanup_mr_table(struct mlx5_core_dev * dev)47 void mlx5_cleanup_mr_table(struct mlx5_core_dev *dev)
48 {
49 }
50
mlx5_core_create_mkey_cb(struct mlx5_core_dev * dev,struct mlx5_core_mr * mkey,struct mlx5_async_ctx * async_ctx,u32 * in,int inlen,u32 * out,int outlen,mlx5_async_cbk_t callback,struct mlx5_async_work * context)51 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
52 struct mlx5_core_mr *mkey,
53 struct mlx5_async_ctx *async_ctx, u32 *in,
54 int inlen, u32 *out, int outlen,
55 mlx5_async_cbk_t callback,
56 struct mlx5_async_work *context)
57 {
58 struct mlx5_mr_table *table = &dev->priv.mr_table;
59 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0};
60 u32 mkey_index;
61 void *mkc;
62 unsigned long flags;
63 int err;
64 u8 key;
65
66 spin_lock_irq(&dev->priv.mkey_lock);
67 key = dev->priv.mkey_key++;
68 spin_unlock_irq(&dev->priv.mkey_lock);
69 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
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 (mlx5_relaxed_ordering_write != 0) {
74 if (MLX5_CAP_GEN(dev, relaxed_ordering_write))
75 MLX5_SET(mkc, mkc, relaxed_ordering_write, 1);
76 else
77 return (-EPROTONOSUPPORT);
78 }
79
80 if (callback)
81 return mlx5_cmd_exec_cb(async_ctx, in, inlen, out, outlen,
82 callback, context);
83
84 err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
85 if (err) {
86 mlx5_core_dbg(dev, "cmd exec failed %d\n", err);
87 return err;
88 }
89
90 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
91 mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
92 mkey->size = MLX5_GET64(mkc, mkc, len);
93 mkey->key = mlx5_idx_to_mkey(mkey_index) | key;
94 mkey->pd = MLX5_GET(mkc, mkc, pd);
95
96 mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
97 mkey_index, key, mkey->key);
98
99 /* connect to MR tree */
100 spin_lock_irqsave(&table->lock, flags);
101 err = radix_tree_insert(&table->tree, mlx5_mkey_to_idx(mkey->key), mkey);
102 spin_unlock_irqrestore(&table->lock, flags);
103 if (err) {
104 mlx5_core_warn(dev, "failed radix tree insert of mr 0x%x, %d\n",
105 mkey->key, err);
106 mlx5_core_destroy_mkey(dev, mkey);
107 }
108
109 return err;
110 }
111 EXPORT_SYMBOL(mlx5_core_create_mkey_cb);
112
mlx5_core_create_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mkey,u32 * in,int inlen)113 int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
114 struct mlx5_core_mr *mkey,
115 u32 *in, int inlen)
116 {
117 return mlx5_core_create_mkey_cb(dev, mkey, NULL, in, inlen,
118 NULL, 0, NULL, NULL);
119 }
120 EXPORT_SYMBOL(mlx5_core_create_mkey);
121
mlx5_core_destroy_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mkey)122 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mkey)
123 {
124 struct mlx5_mr_table *table = &dev->priv.mr_table;
125 u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0};
126 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {0};
127 struct mlx5_core_mr *deleted_mr;
128 unsigned long flags;
129
130 spin_lock_irqsave(&table->lock, flags);
131 deleted_mr = radix_tree_delete(&table->tree, mlx5_mkey_to_idx(mkey->key));
132 spin_unlock_irqrestore(&table->lock, flags);
133 if (!deleted_mr) {
134 mlx5_core_warn(dev, "failed radix tree delete of mr 0x%x\n", mkey->key);
135 return -ENOENT;
136 }
137
138 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
139 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
140
141 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
142 }
143 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
144
mlx5_core_query_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mkey,u32 * out,int outlen)145 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mkey,
146 u32 *out, int outlen)
147 {
148 u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {0};
149
150 memset(out, 0, outlen);
151 MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
152 MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
153
154 return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
155 }
156 EXPORT_SYMBOL(mlx5_core_query_mkey);
157
mlx5_core_dump_fill_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * _mkey,u32 * mkey)158 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *_mkey,
159 u32 *mkey)
160 {
161 u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {0};
162 u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {0};
163 int err;
164
165 MLX5_SET(query_special_contexts_in, in, opcode,
166 MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
167 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
168 if (!err)
169 *mkey = MLX5_GET(query_special_contexts_out, out, dump_fill_mkey);
170
171 return err;
172 }
173 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
174
mlx5_get_psv(u32 * out,int psv_index)175 static inline u32 mlx5_get_psv(u32 *out, int psv_index)
176 {
177 switch (psv_index) {
178 case 1: return MLX5_GET(create_psv_out, out, psv1_index);
179 case 2: return MLX5_GET(create_psv_out, out, psv2_index);
180 case 3: return MLX5_GET(create_psv_out, out, psv3_index);
181 default: return MLX5_GET(create_psv_out, out, psv0_index);
182 }
183 }
184
mlx5_core_create_psv(struct mlx5_core_dev * dev,u32 pdn,int npsvs,u32 * sig_index)185 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
186 int npsvs, u32 *sig_index)
187 {
188 u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0};
189 u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {0};
190 int i, err;
191
192 if (npsvs > MLX5_MAX_PSVS)
193 return -EINVAL;
194
195 MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
196 MLX5_SET(create_psv_in, in, pd, pdn);
197 MLX5_SET(create_psv_in, in, num_psv, npsvs);
198 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
199 if (err) {
200 mlx5_core_err(dev, "create_psv cmd exec failed %d\n", err);
201 return err;
202 }
203
204 for (i = 0; i < npsvs; i++)
205 sig_index[i] = mlx5_get_psv(out, i);
206
207 return err;
208 }
209 EXPORT_SYMBOL(mlx5_core_create_psv);
210
mlx5_core_destroy_psv(struct mlx5_core_dev * dev,int psv_num)211 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
212 {
213 u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0};
214 u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {0};
215
216 MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
217 MLX5_SET(destroy_psv_in, in, psvn, psv_num);
218 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
219 }
220 EXPORT_SYMBOL(mlx5_core_destroy_psv);
221