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_mr_table(struct mlx5_core_dev * dev)39 void mlx5_init_mr_table(struct mlx5_core_dev *dev)
40 {
41 struct mlx5_mr_table *table = &dev->priv.mr_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_mr_table(struct mlx5_core_dev * dev)48 void mlx5_cleanup_mr_table(struct mlx5_core_dev *dev)
49 {
50 }
51
mlx5_core_create_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mr,struct mlx5_create_mkey_mbox_in * in,int inlen,mlx5_cmd_cbk_t callback,void * context,struct mlx5_create_mkey_mbox_out * out)52 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
53 struct mlx5_create_mkey_mbox_in *in, int inlen,
54 mlx5_cmd_cbk_t callback, void *context,
55 struct mlx5_create_mkey_mbox_out *out)
56 {
57 struct mlx5_mr_table *table = &dev->priv.mr_table;
58 struct mlx5_create_mkey_mbox_out lout;
59 int err;
60 u8 key;
61
62 memset(&lout, 0, sizeof(lout));
63 spin_lock_irq(&dev->priv.mkey_lock);
64 key = dev->priv.mkey_key++;
65 spin_unlock_irq(&dev->priv.mkey_lock);
66 in->seg.qpn_mkey7_0 |= cpu_to_be32(key);
67 in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY);
68 if (callback) {
69 err = mlx5_cmd_exec_cb(dev, in, inlen, out, sizeof(*out),
70 callback, context);
71 return err;
72 } else {
73 err = mlx5_cmd_exec(dev, in, inlen, &lout, sizeof(lout));
74 }
75
76 if (err) {
77 mlx5_core_dbg(dev, "cmd exec failed %d\n", err);
78 return err;
79 }
80
81 if (lout.hdr.status) {
82 mlx5_core_dbg(dev, "status %d\n", lout.hdr.status);
83 return mlx5_cmd_status_to_err(&lout.hdr);
84 }
85
86 mr->iova = be64_to_cpu(in->seg.start_addr);
87 mr->size = be64_to_cpu(in->seg.len);
88 mr->key = mlx5_idx_to_mkey(be32_to_cpu(lout.mkey) & 0xffffff) | key;
89 mr->pd = be32_to_cpu(in->seg.flags_pd) & 0xffffff;
90
91 mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
92 be32_to_cpu(lout.mkey), key, mr->key);
93
94 /* connect to MR tree */
95 write_lock_irq(&table->lock);
96 err = radix_tree_insert(&table->tree, mlx5_base_mkey(mr->key), mr);
97 write_unlock_irq(&table->lock);
98 if (err) {
99 mlx5_core_warn(dev, "failed radix tree insert of mr 0x%x, %d\n",
100 mlx5_base_mkey(mr->key), err);
101 mlx5_core_destroy_mkey(dev, mr);
102 }
103
104 return err;
105 }
106 EXPORT_SYMBOL(mlx5_core_create_mkey);
107
mlx5_core_destroy_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mr)108 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
109 {
110 struct mlx5_mr_table *table = &dev->priv.mr_table;
111 struct mlx5_destroy_mkey_mbox_in in;
112 struct mlx5_destroy_mkey_mbox_out out;
113 struct mlx5_core_mr *deleted_mr;
114 unsigned long flags;
115 int err;
116
117 memset(&in, 0, sizeof(in));
118 memset(&out, 0, sizeof(out));
119
120 write_lock_irqsave(&table->lock, flags);
121 deleted_mr = radix_tree_delete(&table->tree, mlx5_base_mkey(mr->key));
122 write_unlock_irqrestore(&table->lock, flags);
123 if (!deleted_mr) {
124 mlx5_core_warn(dev, "failed radix tree delete of mr 0x%x\n",
125 mlx5_base_mkey(mr->key));
126 return -ENOENT;
127 }
128
129 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY);
130 in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
131 err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
132 if (err)
133 return err;
134
135 if (out.hdr.status)
136 return mlx5_cmd_status_to_err(&out.hdr);
137
138 return err;
139 }
140 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
141
mlx5_core_query_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mr,struct mlx5_query_mkey_mbox_out * out,int outlen)142 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
143 struct mlx5_query_mkey_mbox_out *out, int outlen)
144 {
145 struct mlx5_query_mkey_mbox_in in;
146 int err;
147
148 memset(&in, 0, sizeof(in));
149 memset(out, 0, outlen);
150
151 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY);
152 in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
153 err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
154 if (err)
155 return err;
156
157 if (out->hdr.status)
158 return mlx5_cmd_status_to_err(&out->hdr);
159
160 return err;
161 }
162 EXPORT_SYMBOL(mlx5_core_query_mkey);
163
mlx5_core_dump_fill_mkey(struct mlx5_core_dev * dev,struct mlx5_core_mr * mr,u32 * mkey)164 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
165 u32 *mkey)
166 {
167 struct mlx5_query_special_ctxs_mbox_in in;
168 struct mlx5_query_special_ctxs_mbox_out out;
169 int err;
170
171 memset(&in, 0, sizeof(in));
172 memset(&out, 0, sizeof(out));
173
174 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
175 err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
176 if (err)
177 return err;
178
179 if (out.hdr.status)
180 return mlx5_cmd_status_to_err(&out.hdr);
181
182 *mkey = be32_to_cpu(out.dump_fill_mkey);
183
184 return err;
185 }
186 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
187
mlx5_core_create_psv(struct mlx5_core_dev * dev,u32 pdn,int npsvs,u32 * sig_index)188 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
189 int npsvs, u32 *sig_index)
190 {
191 struct mlx5_allocate_psv_in in;
192 struct mlx5_allocate_psv_out out;
193 int i, err;
194
195 if (npsvs > MLX5_MAX_PSVS)
196 return -EINVAL;
197
198 memset(&in, 0, sizeof(in));
199 memset(&out, 0, sizeof(out));
200
201 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_PSV);
202 in.npsv_pd = cpu_to_be32((npsvs << 28) | pdn);
203 err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
204 if (err) {
205 mlx5_core_err(dev, "cmd exec failed %d\n", err);
206 return err;
207 }
208
209 if (out.hdr.status) {
210 mlx5_core_err(dev, "create_psv bad status %d\n",
211 out.hdr.status);
212 return mlx5_cmd_status_to_err(&out.hdr);
213 }
214
215 for (i = 0; i < npsvs; i++)
216 sig_index[i] = be32_to_cpu(out.psv_idx[i]) & 0xffffff;
217
218 return err;
219 }
220 EXPORT_SYMBOL(mlx5_core_create_psv);
221
mlx5_core_destroy_psv(struct mlx5_core_dev * dev,int psv_num)222 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
223 {
224 struct mlx5_destroy_psv_in in;
225 struct mlx5_destroy_psv_out out;
226 int err;
227
228 memset(&in, 0, sizeof(in));
229 memset(&out, 0, sizeof(out));
230
231 in.psv_number = cpu_to_be32(psv_num);
232 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_PSV);
233 err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
234 if (err) {
235 mlx5_core_err(dev, "destroy_psv cmd exec failed %d\n", err);
236 goto out;
237 }
238
239 if (out.hdr.status) {
240 mlx5_core_err(dev, "destroy_psv bad status %d\n",
241 out.hdr.status);
242 err = mlx5_cmd_status_to_err(&out.hdr);
243 goto out;
244 }
245
246 out:
247 return err;
248 }
249 EXPORT_SYMBOL(mlx5_core_destroy_psv);
250