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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 | ||
34 | #include <linux/gfp.h> | |
35 | #include <linux/export.h> | |
36 | #include <linux/mlx5/cmd.h> | |
37 | #include <linux/mlx5/qp.h> | |
38 | #include <linux/mlx5/driver.h> | |
39 | ||
40 | #include "mlx5_core.h" | |
41 | ||
42 | void mlx5_qp_event(struct mlx5_core_dev *dev, u32 qpn, int event_type) | |
43 | { | |
44 | struct mlx5_qp_table *table = &dev->priv.qp_table; | |
45 | struct mlx5_core_qp *qp; | |
46 | ||
47 | spin_lock(&table->lock); | |
48 | ||
49 | qp = radix_tree_lookup(&table->tree, qpn); | |
50 | if (qp) | |
51 | atomic_inc(&qp->refcount); | |
52 | ||
53 | spin_unlock(&table->lock); | |
54 | ||
55 | if (!qp) { | |
56 | mlx5_core_warn(dev, "Async event for bogus QP 0x%x\n", qpn); | |
57 | return; | |
58 | } | |
59 | ||
60 | qp->event(qp, event_type); | |
61 | ||
62 | if (atomic_dec_and_test(&qp->refcount)) | |
63 | complete(&qp->free); | |
64 | } | |
65 | ||
66 | int mlx5_core_create_qp(struct mlx5_core_dev *dev, | |
67 | struct mlx5_core_qp *qp, | |
68 | struct mlx5_create_qp_mbox_in *in, | |
69 | int inlen) | |
70 | { | |
71 | struct mlx5_qp_table *table = &dev->priv.qp_table; | |
72 | struct mlx5_create_qp_mbox_out out; | |
73 | struct mlx5_destroy_qp_mbox_in din; | |
74 | struct mlx5_destroy_qp_mbox_out dout; | |
75 | int err; | |
76 | ||
77 | memset(&dout, 0, sizeof(dout)); | |
78 | in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_QP); | |
79 | ||
80 | err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); | |
81 | if (err) { | |
82 | mlx5_core_warn(dev, "ret %d", err); | |
83 | return err; | |
84 | } | |
85 | ||
86 | if (out.hdr.status) { | |
87 | pr_warn("current num of QPs 0x%x\n", atomic_read(&dev->num_qps)); | |
88 | return mlx5_cmd_status_to_err(&out.hdr); | |
89 | } | |
90 | ||
91 | qp->qpn = be32_to_cpu(out.qpn) & 0xffffff; | |
92 | mlx5_core_dbg(dev, "qpn = 0x%x\n", qp->qpn); | |
93 | ||
94 | spin_lock_irq(&table->lock); | |
95 | err = radix_tree_insert(&table->tree, qp->qpn, qp); | |
96 | spin_unlock_irq(&table->lock); | |
97 | if (err) { | |
98 | mlx5_core_warn(dev, "err %d", err); | |
99 | goto err_cmd; | |
100 | } | |
101 | ||
102 | err = mlx5_debug_qp_add(dev, qp); | |
103 | if (err) | |
104 | mlx5_core_dbg(dev, "failed adding QP 0x%x to debug file system\n", | |
105 | qp->qpn); | |
106 | ||
107 | qp->pid = current->pid; | |
108 | atomic_set(&qp->refcount, 1); | |
109 | atomic_inc(&dev->num_qps); | |
110 | init_completion(&qp->free); | |
111 | ||
112 | return 0; | |
113 | ||
114 | err_cmd: | |
115 | memset(&din, 0, sizeof(din)); | |
116 | memset(&dout, 0, sizeof(dout)); | |
117 | din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP); | |
118 | din.qpn = cpu_to_be32(qp->qpn); | |
119 | mlx5_cmd_exec(dev, &din, sizeof(din), &out, sizeof(dout)); | |
120 | ||
121 | return err; | |
122 | } | |
123 | EXPORT_SYMBOL_GPL(mlx5_core_create_qp); | |
124 | ||
125 | int mlx5_core_destroy_qp(struct mlx5_core_dev *dev, | |
126 | struct mlx5_core_qp *qp) | |
127 | { | |
128 | struct mlx5_destroy_qp_mbox_in in; | |
129 | struct mlx5_destroy_qp_mbox_out out; | |
130 | struct mlx5_qp_table *table = &dev->priv.qp_table; | |
131 | unsigned long flags; | |
132 | int err; | |
133 | ||
134 | mlx5_debug_qp_remove(dev, qp); | |
135 | ||
136 | spin_lock_irqsave(&table->lock, flags); | |
137 | radix_tree_delete(&table->tree, qp->qpn); | |
138 | spin_unlock_irqrestore(&table->lock, flags); | |
139 | ||
140 | if (atomic_dec_and_test(&qp->refcount)) | |
141 | complete(&qp->free); | |
142 | wait_for_completion(&qp->free); | |
143 | ||
144 | memset(&in, 0, sizeof(in)); | |
145 | memset(&out, 0, sizeof(out)); | |
146 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP); | |
147 | in.qpn = cpu_to_be32(qp->qpn); | |
148 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); | |
149 | if (err) | |
150 | return err; | |
151 | ||
152 | if (out.hdr.status) | |
153 | return mlx5_cmd_status_to_err(&out.hdr); | |
154 | ||
155 | atomic_dec(&dev->num_qps); | |
156 | return 0; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(mlx5_core_destroy_qp); | |
159 | ||
160 | int mlx5_core_qp_modify(struct mlx5_core_dev *dev, enum mlx5_qp_state cur_state, | |
161 | enum mlx5_qp_state new_state, | |
162 | struct mlx5_modify_qp_mbox_in *in, int sqd_event, | |
163 | struct mlx5_core_qp *qp) | |
164 | { | |
165 | static const u16 optab[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE] = { | |
166 | [MLX5_QP_STATE_RST] = { | |
167 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
168 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
169 | [MLX5_QP_STATE_INIT] = MLX5_CMD_OP_RST2INIT_QP, | |
170 | }, | |
171 | [MLX5_QP_STATE_INIT] = { | |
172 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
173 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
174 | [MLX5_QP_STATE_INIT] = MLX5_CMD_OP_INIT2INIT_QP, | |
175 | [MLX5_QP_STATE_RTR] = MLX5_CMD_OP_INIT2RTR_QP, | |
176 | }, | |
177 | [MLX5_QP_STATE_RTR] = { | |
178 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
179 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
180 | [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_RTR2RTS_QP, | |
181 | }, | |
182 | [MLX5_QP_STATE_RTS] = { | |
183 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
184 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
185 | [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_RTS2RTS_QP, | |
186 | [MLX5_QP_STATE_SQD] = MLX5_CMD_OP_RTS2SQD_QP, | |
187 | }, | |
188 | [MLX5_QP_STATE_SQD] = { | |
189 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
190 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
191 | [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_SQD2RTS_QP, | |
192 | [MLX5_QP_STATE_SQD] = MLX5_CMD_OP_SQD2SQD_QP, | |
193 | }, | |
194 | [MLX5_QP_STATE_SQER] = { | |
195 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
196 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
197 | [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_SQERR2RTS_QP, | |
198 | }, | |
199 | [MLX5_QP_STATE_ERR] = { | |
200 | [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, | |
201 | [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, | |
202 | } | |
203 | }; | |
204 | ||
205 | struct mlx5_modify_qp_mbox_out out; | |
206 | int err = 0; | |
207 | u16 op; | |
208 | ||
209 | if (cur_state >= MLX5_QP_NUM_STATE || new_state >= MLX5_QP_NUM_STATE || | |
210 | !optab[cur_state][new_state]) | |
211 | return -EINVAL; | |
212 | ||
213 | memset(&out, 0, sizeof(out)); | |
214 | op = optab[cur_state][new_state]; | |
215 | in->hdr.opcode = cpu_to_be16(op); | |
216 | in->qpn = cpu_to_be32(qp->qpn); | |
217 | err = mlx5_cmd_exec(dev, in, sizeof(*in), &out, sizeof(out)); | |
218 | if (err) | |
219 | return err; | |
220 | ||
221 | return mlx5_cmd_status_to_err(&out.hdr); | |
222 | } | |
223 | EXPORT_SYMBOL_GPL(mlx5_core_qp_modify); | |
224 | ||
225 | void mlx5_init_qp_table(struct mlx5_core_dev *dev) | |
226 | { | |
227 | struct mlx5_qp_table *table = &dev->priv.qp_table; | |
228 | ||
229 | spin_lock_init(&table->lock); | |
230 | INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); | |
231 | mlx5_qp_debugfs_init(dev); | |
232 | } | |
233 | ||
234 | void mlx5_cleanup_qp_table(struct mlx5_core_dev *dev) | |
235 | { | |
236 | mlx5_qp_debugfs_cleanup(dev); | |
237 | } | |
238 | ||
239 | int mlx5_core_qp_query(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, | |
240 | struct mlx5_query_qp_mbox_out *out, int outlen) | |
241 | { | |
242 | struct mlx5_query_qp_mbox_in in; | |
243 | int err; | |
244 | ||
245 | memset(&in, 0, sizeof(in)); | |
246 | memset(out, 0, outlen); | |
247 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_QP); | |
248 | in.qpn = cpu_to_be32(qp->qpn); | |
249 | err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen); | |
250 | if (err) | |
251 | return err; | |
252 | ||
253 | if (out->hdr.status) | |
254 | return mlx5_cmd_status_to_err(&out->hdr); | |
255 | ||
256 | return err; | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(mlx5_core_qp_query); | |
259 | ||
260 | int mlx5_core_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn) | |
261 | { | |
262 | struct mlx5_alloc_xrcd_mbox_in in; | |
263 | struct mlx5_alloc_xrcd_mbox_out out; | |
264 | int err; | |
265 | ||
266 | memset(&in, 0, sizeof(in)); | |
267 | memset(&out, 0, sizeof(out)); | |
268 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_XRCD); | |
269 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); | |
270 | if (err) | |
271 | return err; | |
272 | ||
273 | if (out.hdr.status) | |
274 | err = mlx5_cmd_status_to_err(&out.hdr); | |
275 | else | |
276 | *xrcdn = be32_to_cpu(out.xrcdn); | |
277 | ||
278 | return err; | |
279 | } | |
280 | EXPORT_SYMBOL_GPL(mlx5_core_xrcd_alloc); | |
281 | ||
282 | int mlx5_core_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn) | |
283 | { | |
284 | struct mlx5_dealloc_xrcd_mbox_in in; | |
285 | struct mlx5_dealloc_xrcd_mbox_out out; | |
286 | int err; | |
287 | ||
288 | memset(&in, 0, sizeof(in)); | |
289 | memset(&out, 0, sizeof(out)); | |
290 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_XRCD); | |
291 | in.xrcdn = cpu_to_be32(xrcdn); | |
292 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); | |
293 | if (err) | |
294 | return err; | |
295 | ||
296 | if (out.hdr.status) | |
297 | err = mlx5_cmd_status_to_err(&out.hdr); | |
298 | ||
299 | return err; | |
300 | } | |
301 | EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc); |