1 /*
2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008, 2014 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/mlx4/cmd.h>
35 #include <linux/mlx4/srq.h>
36 #include <linux/module.h>
37 #include <linux/gfp.h>
38
39 #include "mlx4.h"
40 #include "icm.h"
41
mlx4_srq_event(struct mlx4_dev * dev,u32 srqn,int event_type)42 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
43 {
44 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
45 struct mlx4_srq *srq;
46
47 spin_lock(&srq_table->lock);
48
49 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
50 if (srq)
51 atomic_inc(&srq->refcount);
52
53 spin_unlock(&srq_table->lock);
54
55 if (!srq) {
56 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
57 return;
58 }
59
60 srq->event(srq, event_type);
61
62 if (atomic_dec_and_test(&srq->refcount))
63 complete(&srq->free);
64 }
65
mlx4_SW2HW_SRQ(struct mlx4_dev * dev,struct mlx4_cmd_mailbox * mailbox,int srq_num)66 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
67 int srq_num)
68 {
69 return mlx4_cmd(dev, mailbox->dma, srq_num, 0,
70 MLX4_CMD_SW2HW_SRQ, MLX4_CMD_TIME_CLASS_A,
71 MLX4_CMD_WRAPPED);
72 }
73
mlx4_HW2SW_SRQ(struct mlx4_dev * dev,struct mlx4_cmd_mailbox * mailbox,int srq_num)74 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
75 int srq_num)
76 {
77 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
78 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ,
79 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
80 }
81
mlx4_ARM_SRQ(struct mlx4_dev * dev,int srq_num,int limit_watermark)82 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
83 {
84 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
85 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
86 }
87
mlx4_QUERY_SRQ(struct mlx4_dev * dev,struct mlx4_cmd_mailbox * mailbox,int srq_num)88 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
89 int srq_num)
90 {
91 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ,
92 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
93 }
94
__mlx4_srq_alloc_icm(struct mlx4_dev * dev,int * srqn)95 int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
96 {
97 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
98 int err;
99
100
101 *srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
102 if (*srqn == -1)
103 return -ENOMEM;
104
105 err = mlx4_table_get(dev, &srq_table->table, *srqn);
106 if (err)
107 goto err_out;
108
109 err = mlx4_table_get(dev, &srq_table->cmpt_table, *srqn);
110 if (err)
111 goto err_put;
112 return 0;
113
114 err_put:
115 mlx4_table_put(dev, &srq_table->table, *srqn);
116
117 err_out:
118 mlx4_bitmap_free(&srq_table->bitmap, *srqn, MLX4_NO_RR);
119 return err;
120 }
121
mlx4_srq_alloc_icm(struct mlx4_dev * dev,int * srqn)122 static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
123 {
124 u64 out_param;
125 int err;
126
127 if (mlx4_is_mfunc(dev)) {
128 err = mlx4_cmd_imm(dev, 0, &out_param, RES_SRQ,
129 RES_OP_RESERVE_AND_MAP,
130 MLX4_CMD_ALLOC_RES,
131 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
132 if (!err)
133 *srqn = get_param_l(&out_param);
134
135 return err;
136 }
137 return __mlx4_srq_alloc_icm(dev, srqn);
138 }
139
__mlx4_srq_free_icm(struct mlx4_dev * dev,int srqn)140 void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
141 {
142 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
143
144 mlx4_table_put(dev, &srq_table->cmpt_table, srqn);
145 mlx4_table_put(dev, &srq_table->table, srqn);
146 mlx4_bitmap_free(&srq_table->bitmap, srqn, MLX4_NO_RR);
147 }
148
mlx4_srq_free_icm(struct mlx4_dev * dev,int srqn)149 static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
150 {
151 u64 in_param = 0;
152
153 if (mlx4_is_mfunc(dev)) {
154 set_param_l(&in_param, srqn);
155 if (mlx4_cmd(dev, in_param, RES_SRQ, RES_OP_RESERVE_AND_MAP,
156 MLX4_CMD_FREE_RES,
157 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED))
158 mlx4_warn(dev, "Failed freeing cq:%d\n", srqn);
159 return;
160 }
161 __mlx4_srq_free_icm(dev, srqn);
162 }
163
mlx4_srq_alloc(struct mlx4_dev * dev,u32 pdn,u32 cqn,u16 xrcd,struct mlx4_mtt * mtt,u64 db_rec,struct mlx4_srq * srq)164 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd,
165 struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq)
166 {
167 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
168 struct mlx4_cmd_mailbox *mailbox;
169 struct mlx4_srq_context *srq_context;
170 u64 mtt_addr;
171 int err;
172
173 err = mlx4_srq_alloc_icm(dev, &srq->srqn);
174 if (err)
175 return err;
176
177 spin_lock_irq(&srq_table->lock);
178 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq);
179 spin_unlock_irq(&srq_table->lock);
180 if (err)
181 goto err_icm;
182
183 mailbox = mlx4_alloc_cmd_mailbox(dev);
184 if (IS_ERR(mailbox)) {
185 err = PTR_ERR(mailbox);
186 goto err_radix;
187 }
188
189 srq_context = mailbox->buf;
190 memset(srq_context, 0, sizeof *srq_context);
191
192 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
193 srq->srqn);
194 srq_context->logstride = srq->wqe_shift - 4;
195 srq_context->xrcd = cpu_to_be16(xrcd);
196 srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff);
197 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
198
199 mtt_addr = mlx4_mtt_addr(dev, mtt);
200 srq_context->mtt_base_addr_h = mtt_addr >> 32;
201 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
202 srq_context->pd = cpu_to_be32(pdn);
203 srq_context->db_rec_addr = cpu_to_be64(db_rec);
204
205 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
206 mlx4_free_cmd_mailbox(dev, mailbox);
207 if (err)
208 goto err_radix;
209
210 atomic_set(&srq->refcount, 1);
211 init_completion(&srq->free);
212
213 return 0;
214
215 err_radix:
216 spin_lock_irq(&srq_table->lock);
217 radix_tree_delete(&srq_table->tree, srq->srqn);
218 spin_unlock_irq(&srq_table->lock);
219
220 err_icm:
221 mlx4_srq_free_icm(dev, srq->srqn);
222 return err;
223 }
224 EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
225
mlx4_srq_free(struct mlx4_dev * dev,struct mlx4_srq * srq)226 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
227 {
228 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
229 int err;
230
231 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
232 if (err)
233 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
234
235 spin_lock_irq(&srq_table->lock);
236 radix_tree_delete(&srq_table->tree, srq->srqn);
237 spin_unlock_irq(&srq_table->lock);
238
239 if (atomic_dec_and_test(&srq->refcount))
240 complete(&srq->free);
241 wait_for_completion(&srq->free);
242
243 mlx4_srq_free_icm(dev, srq->srqn);
244 }
245 EXPORT_SYMBOL_GPL(mlx4_srq_free);
246
mlx4_srq_arm(struct mlx4_dev * dev,struct mlx4_srq * srq,int limit_watermark)247 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
248 {
249 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
250 }
251 EXPORT_SYMBOL_GPL(mlx4_srq_arm);
252
mlx4_srq_query(struct mlx4_dev * dev,struct mlx4_srq * srq,int * limit_watermark)253 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark)
254 {
255 struct mlx4_cmd_mailbox *mailbox;
256 struct mlx4_srq_context *srq_context;
257 int err;
258
259 mailbox = mlx4_alloc_cmd_mailbox(dev);
260 if (IS_ERR(mailbox))
261 return PTR_ERR(mailbox);
262
263 srq_context = mailbox->buf;
264
265 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn);
266 if (err)
267 goto err_out;
268 *limit_watermark = be16_to_cpu(srq_context->limit_watermark);
269
270 err_out:
271 mlx4_free_cmd_mailbox(dev, mailbox);
272 return err;
273 }
274 EXPORT_SYMBOL_GPL(mlx4_srq_query);
275
mlx4_init_srq_table(struct mlx4_dev * dev)276 int mlx4_init_srq_table(struct mlx4_dev *dev)
277 {
278 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
279 int err;
280
281 spin_lock_init(&srq_table->lock);
282 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
283 if (mlx4_is_slave(dev))
284 return 0;
285
286 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
287 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0);
288 if (err)
289 return err;
290
291 return 0;
292 }
293
mlx4_cleanup_srq_table(struct mlx4_dev * dev)294 void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
295 {
296 if (mlx4_is_slave(dev))
297 return;
298 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);
299 }
300
mlx4_srq_lookup(struct mlx4_dev * dev,u32 srqn)301 struct mlx4_srq *mlx4_srq_lookup(struct mlx4_dev *dev, u32 srqn)
302 {
303 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
304 struct mlx4_srq *srq;
305 unsigned long flags;
306
307 spin_lock_irqsave(&srq_table->lock, flags);
308 srq = radix_tree_lookup(&srq_table->tree,
309 srqn & (dev->caps.num_srqs - 1));
310 spin_unlock_irqrestore(&srq_table->lock, flags);
311
312 return srq;
313 }
314 EXPORT_SYMBOL_GPL(mlx4_srq_lookup);
315