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1 | /* |
2 | * Copyright (c) 2013, Mellanox Technologies inc. 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/hardirq.h> | |
36 | #include <linux/mlx5/driver.h> | |
37 | #include <linux/mlx5/cmd.h> | |
38 | #include <rdma/ib_verbs.h> | |
39 | #include <linux/mlx5/cq.h> | |
40 | #include "mlx5_core.h" | |
41 | ||
42 | void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn) | |
43 | { | |
44 | struct mlx5_core_cq *cq; | |
45 | struct mlx5_cq_table *table = &dev->priv.cq_table; | |
46 | ||
47 | spin_lock(&table->lock); | |
48 | cq = radix_tree_lookup(&table->tree, cqn); | |
49 | if (likely(cq)) | |
50 | atomic_inc(&cq->refcount); | |
51 | spin_unlock(&table->lock); | |
52 | ||
53 | if (!cq) { | |
54 | mlx5_core_warn(dev, "Completion event for bogus CQ 0x%x\n", cqn); | |
55 | return; | |
56 | } | |
57 | ||
58 | ++cq->arm_sn; | |
59 | ||
60 | cq->comp(cq); | |
61 | ||
62 | if (atomic_dec_and_test(&cq->refcount)) | |
63 | complete(&cq->free); | |
64 | } | |
65 | ||
66 | void mlx5_cq_event(struct mlx5_core_dev *dev, u32 cqn, int event_type) | |
67 | { | |
68 | struct mlx5_cq_table *table = &dev->priv.cq_table; | |
69 | struct mlx5_core_cq *cq; | |
70 | ||
71 | spin_lock(&table->lock); | |
72 | ||
73 | cq = radix_tree_lookup(&table->tree, cqn); | |
74 | if (cq) | |
75 | atomic_inc(&cq->refcount); | |
76 | ||
77 | spin_unlock(&table->lock); | |
78 | ||
79 | if (!cq) { | |
80 | mlx5_core_warn(dev, "Async event for bogus CQ 0x%x\n", cqn); | |
81 | return; | |
82 | } | |
83 | ||
84 | cq->event(cq, event_type); | |
85 | ||
86 | if (atomic_dec_and_test(&cq->refcount)) | |
87 | complete(&cq->free); | |
88 | } | |
89 | ||
90 | ||
91 | int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, | |
92 | struct mlx5_create_cq_mbox_in *in, int inlen) | |
93 | { | |
94 | int err; | |
95 | struct mlx5_cq_table *table = &dev->priv.cq_table; | |
96 | struct mlx5_create_cq_mbox_out out; | |
97 | struct mlx5_destroy_cq_mbox_in din; | |
98 | struct mlx5_destroy_cq_mbox_out dout; | |
99 | ||
100 | in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_CQ); | |
101 | memset(&out, 0, sizeof(out)); | |
102 | err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); | |
103 | if (err) | |
104 | return err; | |
105 | ||
106 | if (out.hdr.status) | |
107 | return mlx5_cmd_status_to_err(&out.hdr); | |
108 | ||
109 | cq->cqn = be32_to_cpu(out.cqn) & 0xffffff; | |
110 | cq->cons_index = 0; | |
111 | cq->arm_sn = 0; | |
112 | atomic_set(&cq->refcount, 1); | |
113 | init_completion(&cq->free); | |
114 | ||
115 | spin_lock_irq(&table->lock); | |
116 | err = radix_tree_insert(&table->tree, cq->cqn, cq); | |
117 | spin_unlock_irq(&table->lock); | |
118 | if (err) | |
119 | goto err_cmd; | |
120 | ||
121 | cq->pid = current->pid; | |
122 | err = mlx5_debug_cq_add(dev, cq); | |
123 | if (err) | |
124 | mlx5_core_dbg(dev, "failed adding CP 0x%x to debug file system\n", | |
125 | cq->cqn); | |
126 | ||
127 | return 0; | |
128 | ||
129 | err_cmd: | |
130 | memset(&din, 0, sizeof(din)); | |
131 | memset(&dout, 0, sizeof(dout)); | |
132 | din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); | |
133 | mlx5_cmd_exec(dev, &din, sizeof(din), &dout, sizeof(dout)); | |
134 | return err; | |
135 | } | |
136 | EXPORT_SYMBOL(mlx5_core_create_cq); | |
137 | ||
138 | int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) | |
139 | { | |
140 | struct mlx5_cq_table *table = &dev->priv.cq_table; | |
141 | struct mlx5_destroy_cq_mbox_in in; | |
142 | struct mlx5_destroy_cq_mbox_out out; | |
143 | struct mlx5_core_cq *tmp; | |
144 | int err; | |
145 | ||
146 | spin_lock_irq(&table->lock); | |
147 | tmp = radix_tree_delete(&table->tree, cq->cqn); | |
148 | spin_unlock_irq(&table->lock); | |
149 | if (!tmp) { | |
150 | mlx5_core_warn(dev, "cq 0x%x not found in tree\n", cq->cqn); | |
151 | return -EINVAL; | |
152 | } | |
153 | if (tmp != cq) { | |
154 | mlx5_core_warn(dev, "corruption on srqn 0x%x\n", cq->cqn); | |
155 | return -EINVAL; | |
156 | } | |
157 | ||
158 | memset(&in, 0, sizeof(in)); | |
159 | memset(&out, 0, sizeof(out)); | |
160 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); | |
161 | in.cqn = cpu_to_be32(cq->cqn); | |
162 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); | |
163 | if (err) | |
164 | return err; | |
165 | ||
166 | if (out.hdr.status) | |
167 | return mlx5_cmd_status_to_err(&out.hdr); | |
168 | ||
169 | synchronize_irq(cq->irqn); | |
170 | ||
171 | mlx5_debug_cq_remove(dev, cq); | |
172 | if (atomic_dec_and_test(&cq->refcount)) | |
173 | complete(&cq->free); | |
174 | wait_for_completion(&cq->free); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | EXPORT_SYMBOL(mlx5_core_destroy_cq); | |
179 | ||
180 | int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, | |
181 | struct mlx5_query_cq_mbox_out *out) | |
182 | { | |
183 | struct mlx5_query_cq_mbox_in in; | |
184 | int err; | |
185 | ||
186 | memset(&in, 0, sizeof(in)); | |
187 | memset(out, 0, sizeof(*out)); | |
188 | ||
189 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_CQ); | |
190 | in.cqn = cpu_to_be32(cq->cqn); | |
191 | err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); | |
192 | if (err) | |
193 | return err; | |
194 | ||
195 | if (out->hdr.status) | |
196 | return mlx5_cmd_status_to_err(&out->hdr); | |
197 | ||
198 | return err; | |
199 | } | |
200 | EXPORT_SYMBOL(mlx5_core_query_cq); | |
201 | ||
202 | ||
203 | int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, | |
204 | int type, struct mlx5_cq_modify_params *params) | |
205 | { | |
206 | return -ENOSYS; | |
207 | } | |
208 | ||
209 | int mlx5_init_cq_table(struct mlx5_core_dev *dev) | |
210 | { | |
211 | struct mlx5_cq_table *table = &dev->priv.cq_table; | |
212 | int err; | |
213 | ||
214 | spin_lock_init(&table->lock); | |
215 | INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); | |
216 | err = mlx5_cq_debugfs_init(dev); | |
217 | ||
218 | return err; | |
219 | } | |
220 | ||
221 | void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev) | |
222 | { | |
223 | mlx5_cq_debugfs_cleanup(dev); | |
224 | } |