1 | /* |
2 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2007, 2008 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 | |
35 | #include <linux/mlx4/cmd.h> |
36 | #include <linux/mlx4/srq.h> |
37 | #include <linux/export.h> |
38 | #include <linux/gfp.h> |
39 | |
40 | #include "mlx4.h" |
41 | #include "icm.h" |
42 | |
43 | void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type) |
44 | { |
45 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
46 | struct mlx4_srq *srq; |
47 | |
48 | rcu_read_lock(); |
49 | srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1)); |
50 | rcu_read_unlock(); |
51 | if (srq) |
52 | refcount_inc(r: &srq->refcount); |
53 | else { |
54 | mlx4_warn(dev, "Async event for bogus SRQ %08x\n" , srqn); |
55 | return; |
56 | } |
57 | |
58 | srq->event(srq, event_type); |
59 | |
60 | if (refcount_dec_and_test(r: &srq->refcount)) |
61 | complete(&srq->free); |
62 | } |
63 | |
64 | static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
65 | int srq_num) |
66 | { |
67 | return mlx4_cmd(dev, in_param: mailbox->dma, in_modifier: srq_num, op_modifier: 0, |
68 | op: MLX4_CMD_SW2HW_SRQ, timeout: MLX4_CMD_TIME_CLASS_A, |
69 | native: MLX4_CMD_WRAPPED); |
70 | } |
71 | |
72 | static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
73 | int srq_num) |
74 | { |
75 | return mlx4_cmd_box(dev, in_param: 0, out_param: mailbox ? mailbox->dma : 0, in_modifier: srq_num, |
76 | op_modifier: mailbox ? 0 : 1, op: MLX4_CMD_HW2SW_SRQ, |
77 | timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED); |
78 | } |
79 | |
80 | static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark) |
81 | { |
82 | return mlx4_cmd(dev, in_param: limit_watermark, in_modifier: srq_num, op_modifier: 0, op: MLX4_CMD_ARM_SRQ, |
83 | timeout: MLX4_CMD_TIME_CLASS_B, native: MLX4_CMD_WRAPPED); |
84 | } |
85 | |
86 | static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
87 | int srq_num) |
88 | { |
89 | return mlx4_cmd_box(dev, in_param: 0, out_param: mailbox->dma, in_modifier: srq_num, op_modifier: 0, op: MLX4_CMD_QUERY_SRQ, |
90 | timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED); |
91 | } |
92 | |
93 | int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) |
94 | { |
95 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
96 | int err; |
97 | |
98 | |
99 | *srqn = mlx4_bitmap_alloc(bitmap: &srq_table->bitmap); |
100 | if (*srqn == -1) |
101 | return -ENOMEM; |
102 | |
103 | err = mlx4_table_get(dev, table: &srq_table->table, obj: *srqn); |
104 | if (err) |
105 | goto err_out; |
106 | |
107 | err = mlx4_table_get(dev, table: &srq_table->cmpt_table, obj: *srqn); |
108 | if (err) |
109 | goto err_put; |
110 | return 0; |
111 | |
112 | err_put: |
113 | mlx4_table_put(dev, table: &srq_table->table, obj: *srqn); |
114 | |
115 | err_out: |
116 | mlx4_bitmap_free(bitmap: &srq_table->bitmap, obj: *srqn, use_rr: MLX4_NO_RR); |
117 | return err; |
118 | } |
119 | |
120 | static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) |
121 | { |
122 | u64 out_param; |
123 | int err; |
124 | |
125 | if (mlx4_is_mfunc(dev)) { |
126 | err = mlx4_cmd_imm(dev, in_param: 0, out_param: &out_param, in_modifier: RES_SRQ, |
127 | op_modifier: RES_OP_RESERVE_AND_MAP, |
128 | op: MLX4_CMD_ALLOC_RES, |
129 | timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED); |
130 | if (!err) |
131 | *srqn = get_param_l(arg: &out_param); |
132 | |
133 | return err; |
134 | } |
135 | return __mlx4_srq_alloc_icm(dev, srqn); |
136 | } |
137 | |
138 | void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) |
139 | { |
140 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
141 | |
142 | mlx4_table_put(dev, table: &srq_table->cmpt_table, obj: srqn); |
143 | mlx4_table_put(dev, table: &srq_table->table, obj: srqn); |
144 | mlx4_bitmap_free(bitmap: &srq_table->bitmap, obj: srqn, use_rr: MLX4_NO_RR); |
145 | } |
146 | |
147 | static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) |
148 | { |
149 | u64 in_param = 0; |
150 | |
151 | if (mlx4_is_mfunc(dev)) { |
152 | set_param_l(arg: &in_param, val: srqn); |
153 | if (mlx4_cmd(dev, in_param, in_modifier: RES_SRQ, op_modifier: RES_OP_RESERVE_AND_MAP, |
154 | op: MLX4_CMD_FREE_RES, |
155 | timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED)) |
156 | mlx4_warn(dev, "Failed freeing cq:%d\n" , srqn); |
157 | return; |
158 | } |
159 | __mlx4_srq_free_icm(dev, srqn); |
160 | } |
161 | |
162 | int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd, |
163 | struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq) |
164 | { |
165 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
166 | struct mlx4_cmd_mailbox *mailbox; |
167 | struct mlx4_srq_context *srq_context; |
168 | u64 mtt_addr; |
169 | int err; |
170 | |
171 | err = mlx4_srq_alloc_icm(dev, srqn: &srq->srqn); |
172 | if (err) |
173 | return err; |
174 | |
175 | spin_lock_irq(lock: &srq_table->lock); |
176 | err = radix_tree_insert(&srq_table->tree, index: srq->srqn, srq); |
177 | spin_unlock_irq(lock: &srq_table->lock); |
178 | if (err) |
179 | goto err_icm; |
180 | |
181 | mailbox = mlx4_alloc_cmd_mailbox(dev); |
182 | if (IS_ERR(ptr: mailbox)) { |
183 | err = PTR_ERR(ptr: mailbox); |
184 | goto err_radix; |
185 | } |
186 | |
187 | srq_context = mailbox->buf; |
188 | srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) | |
189 | srq->srqn); |
190 | srq_context->logstride = srq->wqe_shift - 4; |
191 | srq_context->xrcd = cpu_to_be16(xrcd); |
192 | srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff); |
193 | srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; |
194 | |
195 | mtt_addr = mlx4_mtt_addr(dev, mtt); |
196 | srq_context->mtt_base_addr_h = mtt_addr >> 32; |
197 | srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); |
198 | srq_context->pd = cpu_to_be32(pdn); |
199 | srq_context->db_rec_addr = cpu_to_be64(db_rec); |
200 | |
201 | err = mlx4_SW2HW_SRQ(dev, mailbox, srq_num: srq->srqn); |
202 | mlx4_free_cmd_mailbox(dev, mailbox); |
203 | if (err) |
204 | goto err_radix; |
205 | |
206 | refcount_set(r: &srq->refcount, n: 1); |
207 | init_completion(x: &srq->free); |
208 | |
209 | return 0; |
210 | |
211 | err_radix: |
212 | spin_lock_irq(lock: &srq_table->lock); |
213 | radix_tree_delete(&srq_table->tree, srq->srqn); |
214 | spin_unlock_irq(lock: &srq_table->lock); |
215 | |
216 | err_icm: |
217 | mlx4_srq_free_icm(dev, srqn: srq->srqn); |
218 | return err; |
219 | } |
220 | EXPORT_SYMBOL_GPL(mlx4_srq_alloc); |
221 | |
222 | void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq) |
223 | { |
224 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
225 | int err; |
226 | |
227 | err = mlx4_HW2SW_SRQ(dev, NULL, srq_num: srq->srqn); |
228 | if (err) |
229 | mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n" , err, srq->srqn); |
230 | |
231 | spin_lock_irq(lock: &srq_table->lock); |
232 | radix_tree_delete(&srq_table->tree, srq->srqn); |
233 | spin_unlock_irq(lock: &srq_table->lock); |
234 | |
235 | if (refcount_dec_and_test(r: &srq->refcount)) |
236 | complete(&srq->free); |
237 | wait_for_completion(&srq->free); |
238 | |
239 | mlx4_srq_free_icm(dev, srqn: srq->srqn); |
240 | } |
241 | EXPORT_SYMBOL_GPL(mlx4_srq_free); |
242 | |
243 | int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark) |
244 | { |
245 | return mlx4_ARM_SRQ(dev, srq_num: srq->srqn, limit_watermark); |
246 | } |
247 | EXPORT_SYMBOL_GPL(mlx4_srq_arm); |
248 | |
249 | int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark) |
250 | { |
251 | struct mlx4_cmd_mailbox *mailbox; |
252 | struct mlx4_srq_context *srq_context; |
253 | int err; |
254 | |
255 | mailbox = mlx4_alloc_cmd_mailbox(dev); |
256 | if (IS_ERR(ptr: mailbox)) |
257 | return PTR_ERR(ptr: mailbox); |
258 | |
259 | srq_context = mailbox->buf; |
260 | |
261 | err = mlx4_QUERY_SRQ(dev, mailbox, srq_num: srq->srqn); |
262 | if (err) |
263 | goto err_out; |
264 | *limit_watermark = be16_to_cpu(srq_context->limit_watermark); |
265 | |
266 | err_out: |
267 | mlx4_free_cmd_mailbox(dev, mailbox); |
268 | return err; |
269 | } |
270 | EXPORT_SYMBOL_GPL(mlx4_srq_query); |
271 | |
272 | int mlx4_init_srq_table(struct mlx4_dev *dev) |
273 | { |
274 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
275 | |
276 | spin_lock_init(&srq_table->lock); |
277 | INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC); |
278 | if (mlx4_is_slave(dev)) |
279 | return 0; |
280 | |
281 | return mlx4_bitmap_init(bitmap: &srq_table->bitmap, num: dev->caps.num_srqs, |
282 | mask: dev->caps.num_srqs - 1, reserved_bot: dev->caps.reserved_srqs, resetrved_top: 0); |
283 | } |
284 | |
285 | void mlx4_cleanup_srq_table(struct mlx4_dev *dev) |
286 | { |
287 | if (mlx4_is_slave(dev)) |
288 | return; |
289 | mlx4_bitmap_cleanup(bitmap: &mlx4_priv(dev)->srq_table.bitmap); |
290 | } |
291 | |
292 | struct mlx4_srq *mlx4_srq_lookup(struct mlx4_dev *dev, u32 srqn) |
293 | { |
294 | struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; |
295 | struct mlx4_srq *srq; |
296 | |
297 | rcu_read_lock(); |
298 | srq = radix_tree_lookup(&srq_table->tree, |
299 | srqn & (dev->caps.num_srqs - 1)); |
300 | rcu_read_unlock(); |
301 | |
302 | return srq; |
303 | } |
304 | EXPORT_SYMBOL_GPL(mlx4_srq_lookup); |
305 | |