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Commit | Line | Data |
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b518d3e6 | 1 | /* |
fe314195 | 2 | * Copyright(c) 2016 Intel Corporation. |
b518d3e6 DD |
3 | * |
4 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
5 | * redistributing this file, you may do so under either license. | |
6 | * | |
7 | * GPL LICENSE SUMMARY | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * BSD LICENSE | |
19 | * | |
20 | * Redistribution and use in source and binary forms, with or without | |
21 | * modification, are permitted provided that the following conditions | |
22 | * are met: | |
23 | * | |
24 | * - Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * - Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * - Neither the name of Intel Corporation nor the names of its | |
31 | * contributors may be used to endorse or promote products derived | |
32 | * from this software without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
45 | * | |
46 | */ | |
47 | ||
3b0b3fb3 | 48 | #include <linux/hash.h> |
0acb0cc7 DD |
49 | #include <linux/bitops.h> |
50 | #include <linux/lockdep.h> | |
515667f8 DD |
51 | #include <linux/vmalloc.h> |
52 | #include <linux/slab.h> | |
53 | #include <rdma/ib_verbs.h> | |
b518d3e6 | 54 | #include "qp.h" |
515667f8 | 55 | #include "vt.h" |
3b0b3fb3 | 56 | #include "trace.h" |
b518d3e6 | 57 | |
bfbac097 DD |
58 | /* |
59 | * Note that it is OK to post send work requests in the SQE and ERR | |
60 | * states; rvt_do_send() will process them and generate error | |
61 | * completions as per IB 1.2 C10-96. | |
62 | */ | |
63 | const int ib_rvt_state_ops[IB_QPS_ERR + 1] = { | |
64 | [IB_QPS_RESET] = 0, | |
65 | [IB_QPS_INIT] = RVT_POST_RECV_OK, | |
66 | [IB_QPS_RTR] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK, | |
67 | [IB_QPS_RTS] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
68 | RVT_POST_SEND_OK | RVT_PROCESS_SEND_OK | | |
69 | RVT_PROCESS_NEXT_SEND_OK, | |
70 | [IB_QPS_SQD] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
71 | RVT_POST_SEND_OK | RVT_PROCESS_SEND_OK, | |
72 | [IB_QPS_SQE] = RVT_POST_RECV_OK | RVT_PROCESS_RECV_OK | | |
73 | RVT_POST_SEND_OK | RVT_FLUSH_SEND, | |
74 | [IB_QPS_ERR] = RVT_POST_RECV_OK | RVT_FLUSH_RECV | | |
75 | RVT_POST_SEND_OK | RVT_FLUSH_SEND, | |
76 | }; | |
77 | EXPORT_SYMBOL(ib_rvt_state_ops); | |
78 | ||
d2b8d4da MM |
79 | static void get_map_page(struct rvt_qpn_table *qpt, |
80 | struct rvt_qpn_map *map, | |
81 | gfp_t gfp) | |
0acb0cc7 | 82 | { |
d2b8d4da | 83 | unsigned long page = get_zeroed_page(gfp); |
0acb0cc7 DD |
84 | |
85 | /* | |
86 | * Free the page if someone raced with us installing it. | |
87 | */ | |
88 | ||
89 | spin_lock(&qpt->lock); | |
90 | if (map->page) | |
91 | free_page(page); | |
92 | else | |
93 | map->page = (void *)page; | |
94 | spin_unlock(&qpt->lock); | |
95 | } | |
96 | ||
97 | /** | |
98 | * init_qpn_table - initialize the QP number table for a device | |
99 | * @qpt: the QPN table | |
100 | */ | |
101 | static int init_qpn_table(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt) | |
102 | { | |
103 | u32 offset, i; | |
104 | struct rvt_qpn_map *map; | |
105 | int ret = 0; | |
106 | ||
fef2efd6 | 107 | if (!(rdi->dparms.qpn_res_end >= rdi->dparms.qpn_res_start)) |
0acb0cc7 DD |
108 | return -EINVAL; |
109 | ||
110 | spin_lock_init(&qpt->lock); | |
111 | ||
112 | qpt->last = rdi->dparms.qpn_start; | |
113 | qpt->incr = rdi->dparms.qpn_inc << rdi->dparms.qos_shift; | |
114 | ||
115 | /* | |
116 | * Drivers may want some QPs beyond what we need for verbs let them use | |
117 | * our qpn table. No need for two. Lets go ahead and mark the bitmaps | |
118 | * for those. The reserved range must be *after* the range which verbs | |
119 | * will pick from. | |
120 | */ | |
121 | ||
122 | /* Figure out number of bit maps needed before reserved range */ | |
123 | qpt->nmaps = rdi->dparms.qpn_res_start / RVT_BITS_PER_PAGE; | |
124 | ||
125 | /* This should always be zero */ | |
126 | offset = rdi->dparms.qpn_res_start & RVT_BITS_PER_PAGE_MASK; | |
127 | ||
128 | /* Starting with the first reserved bit map */ | |
129 | map = &qpt->map[qpt->nmaps]; | |
130 | ||
131 | rvt_pr_info(rdi, "Reserving QPNs from 0x%x to 0x%x for non-verbs use\n", | |
132 | rdi->dparms.qpn_res_start, rdi->dparms.qpn_res_end); | |
fef2efd6 | 133 | for (i = rdi->dparms.qpn_res_start; i <= rdi->dparms.qpn_res_end; i++) { |
0acb0cc7 | 134 | if (!map->page) { |
d2b8d4da | 135 | get_map_page(qpt, map, GFP_KERNEL); |
0acb0cc7 DD |
136 | if (!map->page) { |
137 | ret = -ENOMEM; | |
138 | break; | |
139 | } | |
140 | } | |
141 | set_bit(offset, map->page); | |
142 | offset++; | |
143 | if (offset == RVT_BITS_PER_PAGE) { | |
144 | /* next page */ | |
145 | qpt->nmaps++; | |
146 | map++; | |
147 | offset = 0; | |
148 | } | |
149 | } | |
150 | return ret; | |
151 | } | |
152 | ||
153 | /** | |
154 | * free_qpn_table - free the QP number table for a device | |
155 | * @qpt: the QPN table | |
156 | */ | |
157 | static void free_qpn_table(struct rvt_qpn_table *qpt) | |
158 | { | |
159 | int i; | |
160 | ||
161 | for (i = 0; i < ARRAY_SIZE(qpt->map); i++) | |
162 | free_page((unsigned long)qpt->map[i].page); | |
163 | } | |
164 | ||
90793f71 DD |
165 | /** |
166 | * rvt_driver_qp_init - Init driver qp resources | |
167 | * @rdi: rvt dev strucutre | |
168 | * | |
169 | * Return: 0 on success | |
170 | */ | |
0acb0cc7 DD |
171 | int rvt_driver_qp_init(struct rvt_dev_info *rdi) |
172 | { | |
173 | int i; | |
174 | int ret = -ENOMEM; | |
175 | ||
0acb0cc7 DD |
176 | if (!rdi->dparms.qp_table_size) |
177 | return -EINVAL; | |
178 | ||
179 | /* | |
180 | * If driver is not doing any QP allocation then make sure it is | |
181 | * providing the necessary QP functions. | |
182 | */ | |
515667f8 DD |
183 | if (!rdi->driver_f.free_all_qps || |
184 | !rdi->driver_f.qp_priv_alloc || | |
185 | !rdi->driver_f.qp_priv_free || | |
186 | !rdi->driver_f.notify_qp_reset) | |
0acb0cc7 DD |
187 | return -EINVAL; |
188 | ||
189 | /* allocate parent object */ | |
d1b697b6 MH |
190 | rdi->qp_dev = kzalloc_node(sizeof(*rdi->qp_dev), GFP_KERNEL, |
191 | rdi->dparms.node); | |
0acb0cc7 DD |
192 | if (!rdi->qp_dev) |
193 | return -ENOMEM; | |
194 | ||
195 | /* allocate hash table */ | |
196 | rdi->qp_dev->qp_table_size = rdi->dparms.qp_table_size; | |
197 | rdi->qp_dev->qp_table_bits = ilog2(rdi->dparms.qp_table_size); | |
198 | rdi->qp_dev->qp_table = | |
d1b697b6 MH |
199 | kmalloc_node(rdi->qp_dev->qp_table_size * |
200 | sizeof(*rdi->qp_dev->qp_table), | |
201 | GFP_KERNEL, rdi->dparms.node); | |
0acb0cc7 DD |
202 | if (!rdi->qp_dev->qp_table) |
203 | goto no_qp_table; | |
204 | ||
205 | for (i = 0; i < rdi->qp_dev->qp_table_size; i++) | |
206 | RCU_INIT_POINTER(rdi->qp_dev->qp_table[i], NULL); | |
207 | ||
208 | spin_lock_init(&rdi->qp_dev->qpt_lock); | |
209 | ||
210 | /* initialize qpn map */ | |
211 | if (init_qpn_table(rdi, &rdi->qp_dev->qpn_table)) | |
212 | goto fail_table; | |
213 | ||
515667f8 DD |
214 | spin_lock_init(&rdi->n_qps_lock); |
215 | ||
216 | return 0; | |
0acb0cc7 DD |
217 | |
218 | fail_table: | |
219 | kfree(rdi->qp_dev->qp_table); | |
220 | free_qpn_table(&rdi->qp_dev->qpn_table); | |
221 | ||
222 | no_qp_table: | |
223 | kfree(rdi->qp_dev); | |
224 | ||
225 | return ret; | |
226 | } | |
227 | ||
228 | /** | |
229 | * free_all_qps - check for QPs still in use | |
230 | * @qpt: the QP table to empty | |
231 | * | |
232 | * There should not be any QPs still in use. | |
233 | * Free memory for table. | |
234 | */ | |
515667f8 | 235 | static unsigned rvt_free_all_qps(struct rvt_dev_info *rdi) |
0acb0cc7 DD |
236 | { |
237 | unsigned long flags; | |
238 | struct rvt_qp *qp; | |
239 | unsigned n, qp_inuse = 0; | |
240 | spinlock_t *ql; /* work around too long line below */ | |
241 | ||
515667f8 DD |
242 | if (rdi->driver_f.free_all_qps) |
243 | qp_inuse = rdi->driver_f.free_all_qps(rdi); | |
0acb0cc7 | 244 | |
4e74080b DD |
245 | qp_inuse += rvt_mcast_tree_empty(rdi); |
246 | ||
0acb0cc7 | 247 | if (!rdi->qp_dev) |
515667f8 | 248 | return qp_inuse; |
0acb0cc7 DD |
249 | |
250 | ql = &rdi->qp_dev->qpt_lock; | |
515667f8 | 251 | spin_lock_irqsave(ql, flags); |
0acb0cc7 DD |
252 | for (n = 0; n < rdi->qp_dev->qp_table_size; n++) { |
253 | qp = rcu_dereference_protected(rdi->qp_dev->qp_table[n], | |
254 | lockdep_is_held(ql)); | |
255 | RCU_INIT_POINTER(rdi->qp_dev->qp_table[n], NULL); | |
515667f8 DD |
256 | |
257 | for (; qp; qp = rcu_dereference_protected(qp->next, | |
258 | lockdep_is_held(ql))) | |
0acb0cc7 | 259 | qp_inuse++; |
0acb0cc7 DD |
260 | } |
261 | spin_unlock_irqrestore(ql, flags); | |
262 | synchronize_rcu(); | |
263 | return qp_inuse; | |
264 | } | |
265 | ||
90793f71 DD |
266 | /** |
267 | * rvt_qp_exit - clean up qps on device exit | |
268 | * @rdi: rvt dev structure | |
269 | * | |
270 | * Check for qp leaks and free resources. | |
271 | */ | |
0acb0cc7 DD |
272 | void rvt_qp_exit(struct rvt_dev_info *rdi) |
273 | { | |
515667f8 | 274 | u32 qps_inuse = rvt_free_all_qps(rdi); |
0acb0cc7 | 275 | |
0acb0cc7 DD |
276 | if (qps_inuse) |
277 | rvt_pr_err(rdi, "QP memory leak! %u still in use\n", | |
278 | qps_inuse); | |
279 | if (!rdi->qp_dev) | |
280 | return; | |
281 | ||
282 | kfree(rdi->qp_dev->qp_table); | |
283 | free_qpn_table(&rdi->qp_dev->qpn_table); | |
284 | kfree(rdi->qp_dev); | |
285 | } | |
286 | ||
515667f8 DD |
287 | static inline unsigned mk_qpn(struct rvt_qpn_table *qpt, |
288 | struct rvt_qpn_map *map, unsigned off) | |
289 | { | |
290 | return (map - qpt->map) * RVT_BITS_PER_PAGE + off; | |
291 | } | |
292 | ||
f1badc71 DD |
293 | /** |
294 | * alloc_qpn - Allocate the next available qpn or zero/one for QP type | |
295 | * IB_QPT_SMI/IB_QPT_GSI | |
296 | *@rdi: rvt device info structure | |
297 | *@qpt: queue pair number table pointer | |
298 | *@port_num: IB port number, 1 based, comes from core | |
299 | * | |
300 | * Return: The queue pair number | |
515667f8 DD |
301 | */ |
302 | static int alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, | |
f1badc71 | 303 | enum ib_qp_type type, u8 port_num, gfp_t gfp) |
515667f8 DD |
304 | { |
305 | u32 i, offset, max_scan, qpn; | |
306 | struct rvt_qpn_map *map; | |
307 | u32 ret; | |
308 | ||
309 | if (rdi->driver_f.alloc_qpn) | |
b7b3cf44 | 310 | return rdi->driver_f.alloc_qpn(rdi, qpt, type, port_num, gfp); |
515667f8 DD |
311 | |
312 | if (type == IB_QPT_SMI || type == IB_QPT_GSI) { | |
313 | unsigned n; | |
314 | ||
315 | ret = type == IB_QPT_GSI; | |
f1badc71 | 316 | n = 1 << (ret + 2 * (port_num - 1)); |
515667f8 DD |
317 | spin_lock(&qpt->lock); |
318 | if (qpt->flags & n) | |
319 | ret = -EINVAL; | |
320 | else | |
321 | qpt->flags |= n; | |
322 | spin_unlock(&qpt->lock); | |
323 | goto bail; | |
324 | } | |
325 | ||
326 | qpn = qpt->last + qpt->incr; | |
327 | if (qpn >= RVT_QPN_MAX) | |
328 | qpn = qpt->incr | ((qpt->last & 1) ^ 1); | |
329 | /* offset carries bit 0 */ | |
330 | offset = qpn & RVT_BITS_PER_PAGE_MASK; | |
331 | map = &qpt->map[qpn / RVT_BITS_PER_PAGE]; | |
332 | max_scan = qpt->nmaps - !offset; | |
333 | for (i = 0;;) { | |
334 | if (unlikely(!map->page)) { | |
d2b8d4da | 335 | get_map_page(qpt, map, gfp); |
515667f8 DD |
336 | if (unlikely(!map->page)) |
337 | break; | |
338 | } | |
339 | do { | |
340 | if (!test_and_set_bit(offset, map->page)) { | |
341 | qpt->last = qpn; | |
342 | ret = qpn; | |
343 | goto bail; | |
344 | } | |
345 | offset += qpt->incr; | |
346 | /* | |
347 | * This qpn might be bogus if offset >= BITS_PER_PAGE. | |
348 | * That is OK. It gets re-assigned below | |
349 | */ | |
350 | qpn = mk_qpn(qpt, map, offset); | |
351 | } while (offset < RVT_BITS_PER_PAGE && qpn < RVT_QPN_MAX); | |
352 | /* | |
353 | * In order to keep the number of pages allocated to a | |
354 | * minimum, we scan the all existing pages before increasing | |
355 | * the size of the bitmap table. | |
356 | */ | |
357 | if (++i > max_scan) { | |
358 | if (qpt->nmaps == RVT_QPNMAP_ENTRIES) | |
359 | break; | |
360 | map = &qpt->map[qpt->nmaps++]; | |
361 | /* start at incr with current bit 0 */ | |
362 | offset = qpt->incr | (offset & 1); | |
363 | } else if (map < &qpt->map[qpt->nmaps]) { | |
364 | ++map; | |
365 | /* start at incr with current bit 0 */ | |
366 | offset = qpt->incr | (offset & 1); | |
367 | } else { | |
368 | map = &qpt->map[0]; | |
369 | /* wrap to first map page, invert bit 0 */ | |
370 | offset = qpt->incr | ((offset & 1) ^ 1); | |
371 | } | |
501edc42 BW |
372 | /* there can be no set bits in low-order QoS bits */ |
373 | WARN_ON(offset & (BIT(rdi->dparms.qos_shift) - 1)); | |
515667f8 DD |
374 | qpn = mk_qpn(qpt, map, offset); |
375 | } | |
376 | ||
377 | ret = -ENOMEM; | |
378 | ||
379 | bail: | |
380 | return ret; | |
381 | } | |
382 | ||
383 | static void free_qpn(struct rvt_qpn_table *qpt, u32 qpn) | |
384 | { | |
385 | struct rvt_qpn_map *map; | |
386 | ||
387 | map = qpt->map + qpn / RVT_BITS_PER_PAGE; | |
388 | if (map->page) | |
389 | clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page); | |
390 | } | |
391 | ||
79a225be DD |
392 | /** |
393 | * rvt_clear_mr_refs - Drop help mr refs | |
394 | * @qp: rvt qp data structure | |
395 | * @clr_sends: If shoudl clear send side or not | |
396 | */ | |
397 | static void rvt_clear_mr_refs(struct rvt_qp *qp, int clr_sends) | |
398 | { | |
399 | unsigned n; | |
8b103e9c | 400 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); |
79a225be DD |
401 | |
402 | if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) | |
403 | rvt_put_ss(&qp->s_rdma_read_sge); | |
404 | ||
405 | rvt_put_ss(&qp->r_sge); | |
406 | ||
407 | if (clr_sends) { | |
408 | while (qp->s_last != qp->s_head) { | |
409 | struct rvt_swqe *wqe = rvt_get_swqe_ptr(qp, qp->s_last); | |
410 | unsigned i; | |
411 | ||
412 | for (i = 0; i < wqe->wr.num_sge; i++) { | |
413 | struct rvt_sge *sge = &wqe->sg_list[i]; | |
414 | ||
415 | rvt_put_mr(sge->mr); | |
416 | } | |
417 | if (qp->ibqp.qp_type == IB_QPT_UD || | |
418 | qp->ibqp.qp_type == IB_QPT_SMI || | |
419 | qp->ibqp.qp_type == IB_QPT_GSI) | |
420 | atomic_dec(&ibah_to_rvtah( | |
421 | wqe->ud_wr.ah)->refcount); | |
422 | if (++qp->s_last >= qp->s_size) | |
423 | qp->s_last = 0; | |
424 | smp_wmb(); /* see qp_set_savail */ | |
425 | } | |
426 | if (qp->s_rdma_mr) { | |
427 | rvt_put_mr(qp->s_rdma_mr); | |
428 | qp->s_rdma_mr = NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | if (qp->ibqp.qp_type != IB_QPT_RC) | |
433 | return; | |
434 | ||
8b103e9c | 435 | for (n = 0; n < rvt_max_atomic(rdi); n++) { |
79a225be DD |
436 | struct rvt_ack_entry *e = &qp->s_ack_queue[n]; |
437 | ||
fe508272 | 438 | if (e->rdma_sge.mr) { |
79a225be DD |
439 | rvt_put_mr(e->rdma_sge.mr); |
440 | e->rdma_sge.mr = NULL; | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | /** | |
446 | * rvt_remove_qp - remove qp form table | |
447 | * @rdi: rvt dev struct | |
448 | * @qp: qp to remove | |
449 | * | |
450 | * Remove the QP from the table so it can't be found asynchronously by | |
451 | * the receive routine. | |
452 | */ | |
453 | static void rvt_remove_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp) | |
454 | { | |
455 | struct rvt_ibport *rvp = rdi->ports[qp->port_num - 1]; | |
456 | u32 n = hash_32(qp->ibqp.qp_num, rdi->qp_dev->qp_table_bits); | |
457 | unsigned long flags; | |
458 | int removed = 1; | |
459 | ||
460 | spin_lock_irqsave(&rdi->qp_dev->qpt_lock, flags); | |
461 | ||
462 | if (rcu_dereference_protected(rvp->qp[0], | |
463 | lockdep_is_held(&rdi->qp_dev->qpt_lock)) == qp) { | |
464 | RCU_INIT_POINTER(rvp->qp[0], NULL); | |
465 | } else if (rcu_dereference_protected(rvp->qp[1], | |
466 | lockdep_is_held(&rdi->qp_dev->qpt_lock)) == qp) { | |
467 | RCU_INIT_POINTER(rvp->qp[1], NULL); | |
468 | } else { | |
469 | struct rvt_qp *q; | |
470 | struct rvt_qp __rcu **qpp; | |
471 | ||
472 | removed = 0; | |
473 | qpp = &rdi->qp_dev->qp_table[n]; | |
474 | for (; (q = rcu_dereference_protected(*qpp, | |
475 | lockdep_is_held(&rdi->qp_dev->qpt_lock))) != NULL; | |
476 | qpp = &q->next) { | |
477 | if (q == qp) { | |
478 | RCU_INIT_POINTER(*qpp, | |
479 | rcu_dereference_protected(qp->next, | |
480 | lockdep_is_held(&rdi->qp_dev->qpt_lock))); | |
481 | removed = 1; | |
482 | trace_rvt_qpremove(qp, n); | |
483 | break; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
488 | spin_unlock_irqrestore(&rdi->qp_dev->qpt_lock, flags); | |
489 | if (removed) { | |
490 | synchronize_rcu(); | |
491 | if (atomic_dec_and_test(&qp->refcount)) | |
492 | wake_up(&qp->wait); | |
493 | } | |
494 | } | |
495 | ||
515667f8 DD |
496 | /** |
497 | * reset_qp - initialize the QP state to the reset state | |
498 | * @qp: the QP to reset | |
499 | * @type: the QP type | |
3b0b3fb3 | 500 | * r and s lock are required to be held by the caller |
515667f8 | 501 | */ |
79a225be | 502 | static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
5a9cf6f2 | 503 | enum ib_qp_type type) |
c0a67f6b BVA |
504 | __releases(&qp->s_lock) |
505 | __releases(&qp->s_hlock) | |
506 | __releases(&qp->r_lock) | |
507 | __acquires(&qp->r_lock) | |
508 | __acquires(&qp->s_hlock) | |
509 | __acquires(&qp->s_lock) | |
515667f8 | 510 | { |
3b0b3fb3 DD |
511 | if (qp->state != IB_QPS_RESET) { |
512 | qp->state = IB_QPS_RESET; | |
513 | ||
514 | /* Let drivers flush their waitlist */ | |
515 | rdi->driver_f.flush_qp_waiters(qp); | |
516 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT); | |
517 | spin_unlock(&qp->s_lock); | |
46a80d62 | 518 | spin_unlock(&qp->s_hlock); |
3b0b3fb3 DD |
519 | spin_unlock_irq(&qp->r_lock); |
520 | ||
521 | /* Stop the send queue and the retry timer */ | |
522 | rdi->driver_f.stop_send_queue(qp); | |
3b0b3fb3 DD |
523 | |
524 | /* Wait for things to stop */ | |
525 | rdi->driver_f.quiesce_qp(qp); | |
526 | ||
527 | /* take qp out the hash and wait for it to be unused */ | |
528 | rvt_remove_qp(rdi, qp); | |
529 | wait_event(qp->wait, !atomic_read(&qp->refcount)); | |
530 | ||
531 | /* grab the lock b/c it was locked at call time */ | |
532 | spin_lock_irq(&qp->r_lock); | |
46a80d62 | 533 | spin_lock(&qp->s_hlock); |
3b0b3fb3 DD |
534 | spin_lock(&qp->s_lock); |
535 | ||
536 | rvt_clear_mr_refs(qp, 1); | |
537 | } | |
515667f8 DD |
538 | |
539 | /* | |
3b0b3fb3 DD |
540 | * Let the driver do any tear down it needs to for a qp |
541 | * that has been reset | |
515667f8 DD |
542 | */ |
543 | rdi->driver_f.notify_qp_reset(qp); | |
544 | ||
3b0b3fb3 DD |
545 | qp->remote_qpn = 0; |
546 | qp->qkey = 0; | |
547 | qp->qp_access_flags = 0; | |
515667f8 DD |
548 | qp->s_flags &= RVT_S_SIGNAL_REQ_WR; |
549 | qp->s_hdrwords = 0; | |
550 | qp->s_wqe = NULL; | |
551 | qp->s_draining = 0; | |
552 | qp->s_next_psn = 0; | |
553 | qp->s_last_psn = 0; | |
554 | qp->s_sending_psn = 0; | |
555 | qp->s_sending_hpsn = 0; | |
556 | qp->s_psn = 0; | |
557 | qp->r_psn = 0; | |
558 | qp->r_msn = 0; | |
559 | if (type == IB_QPT_RC) { | |
560 | qp->s_state = IB_OPCODE_RC_SEND_LAST; | |
561 | qp->r_state = IB_OPCODE_RC_SEND_LAST; | |
562 | } else { | |
563 | qp->s_state = IB_OPCODE_UC_SEND_LAST; | |
564 | qp->r_state = IB_OPCODE_UC_SEND_LAST; | |
565 | } | |
566 | qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE; | |
567 | qp->r_nak_state = 0; | |
568 | qp->r_aflags = 0; | |
569 | qp->r_flags = 0; | |
570 | qp->s_head = 0; | |
571 | qp->s_tail = 0; | |
572 | qp->s_cur = 0; | |
573 | qp->s_acked = 0; | |
574 | qp->s_last = 0; | |
575 | qp->s_ssn = 1; | |
576 | qp->s_lsn = 0; | |
577 | qp->s_mig_state = IB_MIG_MIGRATED; | |
515667f8 DD |
578 | qp->r_head_ack_queue = 0; |
579 | qp->s_tail_ack_queue = 0; | |
580 | qp->s_num_rd_atomic = 0; | |
581 | if (qp->r_rq.wq) { | |
582 | qp->r_rq.wq->head = 0; | |
583 | qp->r_rq.wq->tail = 0; | |
584 | } | |
585 | qp->r_sge.num_sge = 0; | |
856cc4c2 | 586 | atomic_set(&qp->s_reserved_used, 0); |
515667f8 DD |
587 | } |
588 | ||
b518d3e6 DD |
589 | /** |
590 | * rvt_create_qp - create a queue pair for a device | |
591 | * @ibpd: the protection domain who's device we create the queue pair for | |
592 | * @init_attr: the attributes of the queue pair | |
593 | * @udata: user data for libibverbs.so | |
594 | * | |
515667f8 DD |
595 | * Queue pair creation is mostly an rvt issue. However, drivers have their own |
596 | * unique idea of what queue pair numbers mean. For instance there is a reserved | |
597 | * range for PSM. | |
598 | * | |
90793f71 | 599 | * Return: the queue pair on success, otherwise returns an errno. |
b518d3e6 DD |
600 | * |
601 | * Called by the ib_create_qp() core verbs function. | |
602 | */ | |
603 | struct ib_qp *rvt_create_qp(struct ib_pd *ibpd, | |
604 | struct ib_qp_init_attr *init_attr, | |
605 | struct ib_udata *udata) | |
606 | { | |
515667f8 DD |
607 | struct rvt_qp *qp; |
608 | int err; | |
609 | struct rvt_swqe *swq = NULL; | |
610 | size_t sz; | |
611 | size_t sg_list_sz; | |
612 | struct ib_qp *ret = ERR_PTR(-ENOMEM); | |
613 | struct rvt_dev_info *rdi = ib_to_rvt(ibpd->device); | |
614 | void *priv = NULL; | |
d2b8d4da | 615 | gfp_t gfp; |
afcf8f76 | 616 | size_t sqsize; |
515667f8 DD |
617 | |
618 | if (!rdi) | |
619 | return ERR_PTR(-EINVAL); | |
620 | ||
621 | if (init_attr->cap.max_send_sge > rdi->dparms.props.max_sge || | |
622 | init_attr->cap.max_send_wr > rdi->dparms.props.max_qp_wr || | |
d2b8d4da | 623 | init_attr->create_flags & ~(IB_QP_CREATE_USE_GFP_NOIO)) |
515667f8 DD |
624 | return ERR_PTR(-EINVAL); |
625 | ||
d2b8d4da MM |
626 | /* GFP_NOIO is applicable to RC QP's only */ |
627 | ||
628 | if (init_attr->create_flags & IB_QP_CREATE_USE_GFP_NOIO && | |
629 | init_attr->qp_type != IB_QPT_RC) | |
630 | return ERR_PTR(-EINVAL); | |
631 | ||
632 | gfp = init_attr->create_flags & IB_QP_CREATE_USE_GFP_NOIO ? | |
633 | GFP_NOIO : GFP_KERNEL; | |
634 | ||
515667f8 DD |
635 | /* Check receive queue parameters if no SRQ is specified. */ |
636 | if (!init_attr->srq) { | |
637 | if (init_attr->cap.max_recv_sge > rdi->dparms.props.max_sge || | |
638 | init_attr->cap.max_recv_wr > rdi->dparms.props.max_qp_wr) | |
639 | return ERR_PTR(-EINVAL); | |
640 | ||
641 | if (init_attr->cap.max_send_sge + | |
642 | init_attr->cap.max_send_wr + | |
643 | init_attr->cap.max_recv_sge + | |
644 | init_attr->cap.max_recv_wr == 0) | |
645 | return ERR_PTR(-EINVAL); | |
646 | } | |
afcf8f76 | 647 | sqsize = |
856cc4c2 MM |
648 | init_attr->cap.max_send_wr + 1 + |
649 | rdi->dparms.reserved_operations; | |
515667f8 DD |
650 | switch (init_attr->qp_type) { |
651 | case IB_QPT_SMI: | |
652 | case IB_QPT_GSI: | |
653 | if (init_attr->port_num == 0 || | |
654 | init_attr->port_num > ibpd->device->phys_port_cnt) | |
655 | return ERR_PTR(-EINVAL); | |
656 | case IB_QPT_UC: | |
657 | case IB_QPT_RC: | |
658 | case IB_QPT_UD: | |
659 | sz = sizeof(struct rvt_sge) * | |
660 | init_attr->cap.max_send_sge + | |
661 | sizeof(struct rvt_swqe); | |
d2b8d4da MM |
662 | if (gfp == GFP_NOIO) |
663 | swq = __vmalloc( | |
afcf8f76 | 664 | sqsize * sz, |
654b6436 | 665 | gfp | __GFP_ZERO, PAGE_KERNEL); |
d2b8d4da | 666 | else |
654b6436 | 667 | swq = vzalloc_node( |
afcf8f76 | 668 | sqsize * sz, |
d1b697b6 | 669 | rdi->dparms.node); |
515667f8 DD |
670 | if (!swq) |
671 | return ERR_PTR(-ENOMEM); | |
672 | ||
673 | sz = sizeof(*qp); | |
674 | sg_list_sz = 0; | |
675 | if (init_attr->srq) { | |
676 | struct rvt_srq *srq = ibsrq_to_rvtsrq(init_attr->srq); | |
677 | ||
678 | if (srq->rq.max_sge > 1) | |
679 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
680 | (srq->rq.max_sge - 1); | |
681 | } else if (init_attr->cap.max_recv_sge > 1) | |
682 | sg_list_sz = sizeof(*qp->r_sg_list) * | |
683 | (init_attr->cap.max_recv_sge - 1); | |
d1b697b6 | 684 | qp = kzalloc_node(sz + sg_list_sz, gfp, rdi->dparms.node); |
515667f8 DD |
685 | if (!qp) |
686 | goto bail_swq; | |
687 | ||
688 | RCU_INIT_POINTER(qp->next, NULL); | |
8b103e9c MM |
689 | if (init_attr->qp_type == IB_QPT_RC) { |
690 | qp->s_ack_queue = | |
691 | kzalloc_node( | |
692 | sizeof(*qp->s_ack_queue) * | |
693 | rvt_max_atomic(rdi), | |
694 | gfp, | |
695 | rdi->dparms.node); | |
696 | if (!qp->s_ack_queue) | |
697 | goto bail_qp; | |
698 | } | |
515667f8 DD |
699 | |
700 | /* | |
701 | * Driver needs to set up it's private QP structure and do any | |
702 | * initialization that is needed. | |
703 | */ | |
d2b8d4da | 704 | priv = rdi->driver_f.qp_priv_alloc(rdi, qp, gfp); |
c755f4af MM |
705 | if (IS_ERR(priv)) { |
706 | ret = priv; | |
515667f8 | 707 | goto bail_qp; |
c755f4af | 708 | } |
515667f8 DD |
709 | qp->priv = priv; |
710 | qp->timeout_jiffies = | |
711 | usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / | |
712 | 1000UL); | |
713 | if (init_attr->srq) { | |
714 | sz = 0; | |
715 | } else { | |
716 | qp->r_rq.size = init_attr->cap.max_recv_wr + 1; | |
717 | qp->r_rq.max_sge = init_attr->cap.max_recv_sge; | |
718 | sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) + | |
719 | sizeof(struct rvt_rwqe); | |
d2b8d4da MM |
720 | if (udata) |
721 | qp->r_rq.wq = vmalloc_user( | |
722 | sizeof(struct rvt_rwq) + | |
723 | qp->r_rq.size * sz); | |
724 | else if (gfp == GFP_NOIO) | |
725 | qp->r_rq.wq = __vmalloc( | |
726 | sizeof(struct rvt_rwq) + | |
727 | qp->r_rq.size * sz, | |
654b6436 | 728 | gfp | __GFP_ZERO, PAGE_KERNEL); |
d2b8d4da | 729 | else |
654b6436 | 730 | qp->r_rq.wq = vzalloc_node( |
d2b8d4da | 731 | sizeof(struct rvt_rwq) + |
d1b697b6 MH |
732 | qp->r_rq.size * sz, |
733 | rdi->dparms.node); | |
515667f8 DD |
734 | if (!qp->r_rq.wq) |
735 | goto bail_driver_priv; | |
736 | } | |
737 | ||
738 | /* | |
739 | * ib_create_qp() will initialize qp->ibqp | |
740 | * except for qp->ibqp.qp_num. | |
741 | */ | |
742 | spin_lock_init(&qp->r_lock); | |
46a80d62 | 743 | spin_lock_init(&qp->s_hlock); |
515667f8 DD |
744 | spin_lock_init(&qp->s_lock); |
745 | spin_lock_init(&qp->r_rq.lock); | |
746 | atomic_set(&qp->refcount, 0); | |
d9f87239 | 747 | atomic_set(&qp->local_ops_pending, 0); |
515667f8 DD |
748 | init_waitqueue_head(&qp->wait); |
749 | init_timer(&qp->s_timer); | |
750 | qp->s_timer.data = (unsigned long)qp; | |
751 | INIT_LIST_HEAD(&qp->rspwait); | |
752 | qp->state = IB_QPS_RESET; | |
753 | qp->s_wq = swq; | |
afcf8f76 | 754 | qp->s_size = sqsize; |
46a80d62 | 755 | qp->s_avail = init_attr->cap.max_send_wr; |
515667f8 DD |
756 | qp->s_max_sge = init_attr->cap.max_send_sge; |
757 | if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR) | |
758 | qp->s_flags = RVT_S_SIGNAL_REQ_WR; | |
759 | ||
760 | err = alloc_qpn(rdi, &rdi->qp_dev->qpn_table, | |
761 | init_attr->qp_type, | |
d2b8d4da | 762 | init_attr->port_num, gfp); |
515667f8 DD |
763 | if (err < 0) { |
764 | ret = ERR_PTR(err); | |
765 | goto bail_rq_wq; | |
766 | } | |
767 | qp->ibqp.qp_num = err; | |
768 | qp->port_num = init_attr->port_num; | |
5a9cf6f2 | 769 | rvt_reset_qp(rdi, qp, init_attr->qp_type); |
515667f8 DD |
770 | break; |
771 | ||
772 | default: | |
773 | /* Don't support raw QPs */ | |
774 | return ERR_PTR(-EINVAL); | |
775 | } | |
776 | ||
777 | init_attr->cap.max_inline_data = 0; | |
778 | ||
779 | /* | |
780 | * Return the address of the RWQ as the offset to mmap. | |
bfbac097 | 781 | * See rvt_mmap() for details. |
515667f8 DD |
782 | */ |
783 | if (udata && udata->outlen >= sizeof(__u64)) { | |
784 | if (!qp->r_rq.wq) { | |
785 | __u64 offset = 0; | |
786 | ||
787 | err = ib_copy_to_udata(udata, &offset, | |
788 | sizeof(offset)); | |
789 | if (err) { | |
790 | ret = ERR_PTR(err); | |
791 | goto bail_qpn; | |
792 | } | |
793 | } else { | |
794 | u32 s = sizeof(struct rvt_rwq) + qp->r_rq.size * sz; | |
795 | ||
796 | qp->ip = rvt_create_mmap_info(rdi, s, | |
797 | ibpd->uobject->context, | |
798 | qp->r_rq.wq); | |
799 | if (!qp->ip) { | |
800 | ret = ERR_PTR(-ENOMEM); | |
801 | goto bail_qpn; | |
802 | } | |
803 | ||
804 | err = ib_copy_to_udata(udata, &qp->ip->offset, | |
805 | sizeof(qp->ip->offset)); | |
806 | if (err) { | |
807 | ret = ERR_PTR(err); | |
808 | goto bail_ip; | |
809 | } | |
810 | } | |
ef086c0d | 811 | qp->pid = current->pid; |
515667f8 DD |
812 | } |
813 | ||
814 | spin_lock(&rdi->n_qps_lock); | |
815 | if (rdi->n_qps_allocated == rdi->dparms.props.max_qp) { | |
816 | spin_unlock(&rdi->n_qps_lock); | |
817 | ret = ERR_PTR(-ENOMEM); | |
818 | goto bail_ip; | |
819 | } | |
820 | ||
821 | rdi->n_qps_allocated++; | |
bfee5e32 VM |
822 | /* |
823 | * Maintain a busy_jiffies variable that will be added to the timeout | |
824 | * period in mod_retry_timer and add_retry_timer. This busy jiffies | |
825 | * is scaled by the number of rc qps created for the device to reduce | |
826 | * the number of timeouts occurring when there is a large number of | |
827 | * qps. busy_jiffies is incremented every rc qp scaling interval. | |
828 | * The scaling interval is selected based on extensive performance | |
829 | * evaluation of targeted workloads. | |
830 | */ | |
831 | if (init_attr->qp_type == IB_QPT_RC) { | |
832 | rdi->n_rc_qps++; | |
833 | rdi->busy_jiffies = rdi->n_rc_qps / RC_QP_SCALING_INTERVAL; | |
834 | } | |
515667f8 DD |
835 | spin_unlock(&rdi->n_qps_lock); |
836 | ||
837 | if (qp->ip) { | |
838 | spin_lock_irq(&rdi->pending_lock); | |
839 | list_add(&qp->ip->pending_mmaps, &rdi->pending_mmaps); | |
840 | spin_unlock_irq(&rdi->pending_lock); | |
841 | } | |
842 | ||
843 | ret = &qp->ibqp; | |
844 | ||
b518d3e6 | 845 | /* |
515667f8 DD |
846 | * We have our QP and its good, now keep track of what types of opcodes |
847 | * can be processed on this QP. We do this by keeping track of what the | |
848 | * 3 high order bits of the opcode are. | |
b518d3e6 | 849 | */ |
515667f8 DD |
850 | switch (init_attr->qp_type) { |
851 | case IB_QPT_SMI: | |
852 | case IB_QPT_GSI: | |
853 | case IB_QPT_UD: | |
b218f786 | 854 | qp->allowed_ops = IB_OPCODE_UD; |
515667f8 DD |
855 | break; |
856 | case IB_QPT_RC: | |
b218f786 | 857 | qp->allowed_ops = IB_OPCODE_RC; |
515667f8 DD |
858 | break; |
859 | case IB_QPT_UC: | |
b218f786 | 860 | qp->allowed_ops = IB_OPCODE_UC; |
515667f8 DD |
861 | break; |
862 | default: | |
863 | ret = ERR_PTR(-EINVAL); | |
864 | goto bail_ip; | |
865 | } | |
866 | ||
867 | return ret; | |
868 | ||
869 | bail_ip: | |
870 | kref_put(&qp->ip->ref, rvt_release_mmap_info); | |
871 | ||
872 | bail_qpn: | |
873 | free_qpn(&rdi->qp_dev->qpn_table, qp->ibqp.qp_num); | |
874 | ||
875 | bail_rq_wq: | |
876 | vfree(qp->r_rq.wq); | |
877 | ||
878 | bail_driver_priv: | |
879 | rdi->driver_f.qp_priv_free(rdi, qp); | |
880 | ||
881 | bail_qp: | |
8b103e9c | 882 | kfree(qp->s_ack_queue); |
515667f8 DD |
883 | kfree(qp); |
884 | ||
885 | bail_swq: | |
886 | vfree(swq); | |
887 | ||
888 | return ret; | |
b518d3e6 DD |
889 | } |
890 | ||
3b0b3fb3 DD |
891 | /** |
892 | * rvt_error_qp - put a QP into the error state | |
893 | * @qp: the QP to put into the error state | |
894 | * @err: the receive completion error to signal if a RWQE is active | |
895 | * | |
896 | * Flushes both send and receive work queues. | |
90793f71 DD |
897 | * |
898 | * Return: true if last WQE event should be generated. | |
3b0b3fb3 DD |
899 | * The QP r_lock and s_lock should be held and interrupts disabled. |
900 | * If we are already in error state, just return. | |
901 | */ | |
902 | int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err) | |
903 | { | |
904 | struct ib_wc wc; | |
905 | int ret = 0; | |
906 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
907 | ||
908 | if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET) | |
909 | goto bail; | |
910 | ||
911 | qp->state = IB_QPS_ERR; | |
912 | ||
913 | if (qp->s_flags & (RVT_S_TIMER | RVT_S_WAIT_RNR)) { | |
914 | qp->s_flags &= ~(RVT_S_TIMER | RVT_S_WAIT_RNR); | |
915 | del_timer(&qp->s_timer); | |
916 | } | |
917 | ||
918 | if (qp->s_flags & RVT_S_ANY_WAIT_SEND) | |
919 | qp->s_flags &= ~RVT_S_ANY_WAIT_SEND; | |
920 | ||
921 | rdi->driver_f.notify_error_qp(qp); | |
922 | ||
923 | /* Schedule the sending tasklet to drain the send work queue. */ | |
46a80d62 | 924 | if (ACCESS_ONCE(qp->s_last) != qp->s_head) |
3b0b3fb3 DD |
925 | rdi->driver_f.schedule_send(qp); |
926 | ||
927 | rvt_clear_mr_refs(qp, 0); | |
928 | ||
929 | memset(&wc, 0, sizeof(wc)); | |
930 | wc.qp = &qp->ibqp; | |
931 | wc.opcode = IB_WC_RECV; | |
932 | ||
933 | if (test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) { | |
934 | wc.wr_id = qp->r_wr_id; | |
935 | wc.status = err; | |
936 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
937 | } | |
938 | wc.status = IB_WC_WR_FLUSH_ERR; | |
939 | ||
940 | if (qp->r_rq.wq) { | |
941 | struct rvt_rwq *wq; | |
942 | u32 head; | |
943 | u32 tail; | |
944 | ||
945 | spin_lock(&qp->r_rq.lock); | |
946 | ||
947 | /* sanity check pointers before trusting them */ | |
948 | wq = qp->r_rq.wq; | |
949 | head = wq->head; | |
950 | if (head >= qp->r_rq.size) | |
951 | head = 0; | |
952 | tail = wq->tail; | |
953 | if (tail >= qp->r_rq.size) | |
954 | tail = 0; | |
955 | while (tail != head) { | |
956 | wc.wr_id = rvt_get_rwqe_ptr(&qp->r_rq, tail)->wr_id; | |
957 | if (++tail >= qp->r_rq.size) | |
958 | tail = 0; | |
959 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
960 | } | |
961 | wq->tail = tail; | |
962 | ||
963 | spin_unlock(&qp->r_rq.lock); | |
964 | } else if (qp->ibqp.event_handler) { | |
965 | ret = 1; | |
966 | } | |
967 | ||
968 | bail: | |
969 | return ret; | |
970 | } | |
971 | EXPORT_SYMBOL(rvt_error_qp); | |
972 | ||
973 | /* | |
974 | * Put the QP into the hash table. | |
975 | * The hash table holds a reference to the QP. | |
976 | */ | |
977 | static void rvt_insert_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp) | |
978 | { | |
979 | struct rvt_ibport *rvp = rdi->ports[qp->port_num - 1]; | |
980 | unsigned long flags; | |
981 | ||
982 | atomic_inc(&qp->refcount); | |
983 | spin_lock_irqsave(&rdi->qp_dev->qpt_lock, flags); | |
984 | ||
985 | if (qp->ibqp.qp_num <= 1) { | |
986 | rcu_assign_pointer(rvp->qp[qp->ibqp.qp_num], qp); | |
987 | } else { | |
988 | u32 n = hash_32(qp->ibqp.qp_num, rdi->qp_dev->qp_table_bits); | |
989 | ||
990 | qp->next = rdi->qp_dev->qp_table[n]; | |
991 | rcu_assign_pointer(rdi->qp_dev->qp_table[n], qp); | |
992 | trace_rvt_qpinsert(qp, n); | |
993 | } | |
994 | ||
995 | spin_unlock_irqrestore(&rdi->qp_dev->qpt_lock, flags); | |
996 | } | |
997 | ||
b518d3e6 DD |
998 | /** |
999 | * qib_modify_qp - modify the attributes of a queue pair | |
1000 | * @ibqp: the queue pair who's attributes we're modifying | |
1001 | * @attr: the new attributes | |
1002 | * @attr_mask: the mask of attributes to modify | |
1003 | * @udata: user data for libibverbs.so | |
1004 | * | |
90793f71 | 1005 | * Return: 0 on success, otherwise returns an errno. |
b518d3e6 DD |
1006 | */ |
1007 | int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, | |
1008 | int attr_mask, struct ib_udata *udata) | |
1009 | { | |
3b0b3fb3 DD |
1010 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); |
1011 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); | |
1012 | enum ib_qp_state cur_state, new_state; | |
1013 | struct ib_event ev; | |
1014 | int lastwqe = 0; | |
1015 | int mig = 0; | |
1016 | int pmtu = 0; /* for gcc warning only */ | |
1017 | enum rdma_link_layer link; | |
1018 | ||
1019 | link = rdma_port_get_link_layer(ibqp->device, qp->port_num); | |
1020 | ||
1021 | spin_lock_irq(&qp->r_lock); | |
46a80d62 | 1022 | spin_lock(&qp->s_hlock); |
3b0b3fb3 DD |
1023 | spin_lock(&qp->s_lock); |
1024 | ||
1025 | cur_state = attr_mask & IB_QP_CUR_STATE ? | |
1026 | attr->cur_qp_state : qp->state; | |
1027 | new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; | |
1028 | ||
1029 | if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, | |
1030 | attr_mask, link)) | |
1031 | goto inval; | |
1032 | ||
e85ec33d IW |
1033 | if (rdi->driver_f.check_modify_qp && |
1034 | rdi->driver_f.check_modify_qp(qp, attr, attr_mask, udata)) | |
1035 | goto inval; | |
1036 | ||
3b0b3fb3 DD |
1037 | if (attr_mask & IB_QP_AV) { |
1038 | if (attr->ah_attr.dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) | |
1039 | goto inval; | |
1040 | if (rvt_check_ah(qp->ibqp.device, &attr->ah_attr)) | |
1041 | goto inval; | |
1042 | } | |
1043 | ||
1044 | if (attr_mask & IB_QP_ALT_PATH) { | |
1045 | if (attr->alt_ah_attr.dlid >= | |
1046 | be16_to_cpu(IB_MULTICAST_LID_BASE)) | |
1047 | goto inval; | |
1048 | if (rvt_check_ah(qp->ibqp.device, &attr->alt_ah_attr)) | |
1049 | goto inval; | |
1050 | if (attr->alt_pkey_index >= rvt_get_npkeys(rdi)) | |
1051 | goto inval; | |
1052 | } | |
1053 | ||
1054 | if (attr_mask & IB_QP_PKEY_INDEX) | |
1055 | if (attr->pkey_index >= rvt_get_npkeys(rdi)) | |
1056 | goto inval; | |
1057 | ||
1058 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
1059 | if (attr->min_rnr_timer > 31) | |
1060 | goto inval; | |
1061 | ||
1062 | if (attr_mask & IB_QP_PORT) | |
1063 | if (qp->ibqp.qp_type == IB_QPT_SMI || | |
1064 | qp->ibqp.qp_type == IB_QPT_GSI || | |
1065 | attr->port_num == 0 || | |
1066 | attr->port_num > ibqp->device->phys_port_cnt) | |
1067 | goto inval; | |
1068 | ||
1069 | if (attr_mask & IB_QP_DEST_QPN) | |
1070 | if (attr->dest_qp_num > RVT_QPN_MASK) | |
1071 | goto inval; | |
1072 | ||
1073 | if (attr_mask & IB_QP_RETRY_CNT) | |
1074 | if (attr->retry_cnt > 7) | |
1075 | goto inval; | |
1076 | ||
1077 | if (attr_mask & IB_QP_RNR_RETRY) | |
1078 | if (attr->rnr_retry > 7) | |
1079 | goto inval; | |
1080 | ||
b518d3e6 | 1081 | /* |
3b0b3fb3 DD |
1082 | * Don't allow invalid path_mtu values. OK to set greater |
1083 | * than the active mtu (or even the max_cap, if we have tuned | |
1084 | * that to a small mtu. We'll set qp->path_mtu | |
1085 | * to the lesser of requested attribute mtu and active, | |
1086 | * for packetizing messages. | |
1087 | * Note that the QP port has to be set in INIT and MTU in RTR. | |
b518d3e6 | 1088 | */ |
3b0b3fb3 DD |
1089 | if (attr_mask & IB_QP_PATH_MTU) { |
1090 | pmtu = rdi->driver_f.get_pmtu_from_attr(rdi, qp, attr); | |
1091 | if (pmtu < 0) | |
1092 | goto inval; | |
1093 | } | |
1094 | ||
1095 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
1096 | if (attr->path_mig_state == IB_MIG_REARM) { | |
1097 | if (qp->s_mig_state == IB_MIG_ARMED) | |
1098 | goto inval; | |
1099 | if (new_state != IB_QPS_RTS) | |
1100 | goto inval; | |
1101 | } else if (attr->path_mig_state == IB_MIG_MIGRATED) { | |
1102 | if (qp->s_mig_state == IB_MIG_REARM) | |
1103 | goto inval; | |
1104 | if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD) | |
1105 | goto inval; | |
1106 | if (qp->s_mig_state == IB_MIG_ARMED) | |
1107 | mig = 1; | |
1108 | } else { | |
1109 | goto inval; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
1114 | if (attr->max_dest_rd_atomic > rdi->dparms.max_rdma_atomic) | |
1115 | goto inval; | |
1116 | ||
1117 | switch (new_state) { | |
1118 | case IB_QPS_RESET: | |
1119 | if (qp->state != IB_QPS_RESET) | |
1120 | rvt_reset_qp(rdi, qp, ibqp->qp_type); | |
1121 | break; | |
1122 | ||
1123 | case IB_QPS_RTR: | |
1124 | /* Allow event to re-trigger if QP set to RTR more than once */ | |
1125 | qp->r_flags &= ~RVT_R_COMM_EST; | |
1126 | qp->state = new_state; | |
1127 | break; | |
1128 | ||
1129 | case IB_QPS_SQD: | |
1130 | qp->s_draining = qp->s_last != qp->s_cur; | |
1131 | qp->state = new_state; | |
1132 | break; | |
1133 | ||
1134 | case IB_QPS_SQE: | |
1135 | if (qp->ibqp.qp_type == IB_QPT_RC) | |
1136 | goto inval; | |
1137 | qp->state = new_state; | |
1138 | break; | |
1139 | ||
1140 | case IB_QPS_ERR: | |
1141 | lastwqe = rvt_error_qp(qp, IB_WC_WR_FLUSH_ERR); | |
1142 | break; | |
1143 | ||
1144 | default: | |
1145 | qp->state = new_state; | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | if (attr_mask & IB_QP_PKEY_INDEX) | |
1150 | qp->s_pkey_index = attr->pkey_index; | |
1151 | ||
1152 | if (attr_mask & IB_QP_PORT) | |
1153 | qp->port_num = attr->port_num; | |
1154 | ||
1155 | if (attr_mask & IB_QP_DEST_QPN) | |
1156 | qp->remote_qpn = attr->dest_qp_num; | |
1157 | ||
1158 | if (attr_mask & IB_QP_SQ_PSN) { | |
1159 | qp->s_next_psn = attr->sq_psn & rdi->dparms.psn_modify_mask; | |
1160 | qp->s_psn = qp->s_next_psn; | |
1161 | qp->s_sending_psn = qp->s_next_psn; | |
1162 | qp->s_last_psn = qp->s_next_psn - 1; | |
1163 | qp->s_sending_hpsn = qp->s_last_psn; | |
1164 | } | |
1165 | ||
1166 | if (attr_mask & IB_QP_RQ_PSN) | |
1167 | qp->r_psn = attr->rq_psn & rdi->dparms.psn_modify_mask; | |
1168 | ||
1169 | if (attr_mask & IB_QP_ACCESS_FLAGS) | |
1170 | qp->qp_access_flags = attr->qp_access_flags; | |
1171 | ||
1172 | if (attr_mask & IB_QP_AV) { | |
1173 | qp->remote_ah_attr = attr->ah_attr; | |
1174 | qp->s_srate = attr->ah_attr.static_rate; | |
1175 | qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); | |
1176 | } | |
1177 | ||
1178 | if (attr_mask & IB_QP_ALT_PATH) { | |
1179 | qp->alt_ah_attr = attr->alt_ah_attr; | |
1180 | qp->s_alt_pkey_index = attr->alt_pkey_index; | |
1181 | } | |
1182 | ||
1183 | if (attr_mask & IB_QP_PATH_MIG_STATE) { | |
1184 | qp->s_mig_state = attr->path_mig_state; | |
1185 | if (mig) { | |
1186 | qp->remote_ah_attr = qp->alt_ah_attr; | |
1187 | qp->port_num = qp->alt_ah_attr.port_num; | |
1188 | qp->s_pkey_index = qp->s_alt_pkey_index; | |
3b0b3fb3 DD |
1189 | } |
1190 | } | |
1191 | ||
1192 | if (attr_mask & IB_QP_PATH_MTU) { | |
1193 | qp->pmtu = rdi->driver_f.mtu_from_qp(rdi, qp, pmtu); | |
1194 | qp->path_mtu = rdi->driver_f.mtu_to_path_mtu(qp->pmtu); | |
46a80d62 | 1195 | qp->log_pmtu = ilog2(qp->pmtu); |
3b0b3fb3 DD |
1196 | } |
1197 | ||
1198 | if (attr_mask & IB_QP_RETRY_CNT) { | |
1199 | qp->s_retry_cnt = attr->retry_cnt; | |
1200 | qp->s_retry = attr->retry_cnt; | |
1201 | } | |
1202 | ||
1203 | if (attr_mask & IB_QP_RNR_RETRY) { | |
1204 | qp->s_rnr_retry_cnt = attr->rnr_retry; | |
1205 | qp->s_rnr_retry = attr->rnr_retry; | |
1206 | } | |
1207 | ||
1208 | if (attr_mask & IB_QP_MIN_RNR_TIMER) | |
1209 | qp->r_min_rnr_timer = attr->min_rnr_timer; | |
1210 | ||
1211 | if (attr_mask & IB_QP_TIMEOUT) { | |
1212 | qp->timeout = attr->timeout; | |
1213 | qp->timeout_jiffies = | |
1214 | usecs_to_jiffies((4096UL * (1UL << qp->timeout)) / | |
1215 | 1000UL); | |
1216 | } | |
1217 | ||
1218 | if (attr_mask & IB_QP_QKEY) | |
1219 | qp->qkey = attr->qkey; | |
1220 | ||
1221 | if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) | |
1222 | qp->r_max_rd_atomic = attr->max_dest_rd_atomic; | |
1223 | ||
1224 | if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) | |
1225 | qp->s_max_rd_atomic = attr->max_rd_atomic; | |
1226 | ||
e85ec33d IW |
1227 | if (rdi->driver_f.modify_qp) |
1228 | rdi->driver_f.modify_qp(qp, attr, attr_mask, udata); | |
1229 | ||
3b0b3fb3 | 1230 | spin_unlock(&qp->s_lock); |
46a80d62 | 1231 | spin_unlock(&qp->s_hlock); |
3b0b3fb3 DD |
1232 | spin_unlock_irq(&qp->r_lock); |
1233 | ||
1234 | if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) | |
1235 | rvt_insert_qp(rdi, qp); | |
1236 | ||
1237 | if (lastwqe) { | |
1238 | ev.device = qp->ibqp.device; | |
1239 | ev.element.qp = &qp->ibqp; | |
1240 | ev.event = IB_EVENT_QP_LAST_WQE_REACHED; | |
1241 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
1242 | } | |
1243 | if (mig) { | |
1244 | ev.device = qp->ibqp.device; | |
1245 | ev.element.qp = &qp->ibqp; | |
1246 | ev.event = IB_EVENT_PATH_MIG; | |
1247 | qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); | |
1248 | } | |
1249 | return 0; | |
1250 | ||
1251 | inval: | |
1252 | spin_unlock(&qp->s_lock); | |
46a80d62 | 1253 | spin_unlock(&qp->s_hlock); |
3b0b3fb3 DD |
1254 | spin_unlock_irq(&qp->r_lock); |
1255 | return -EINVAL; | |
b518d3e6 DD |
1256 | } |
1257 | ||
79a225be DD |
1258 | /** rvt_free_qpn - Free a qpn from the bit map |
1259 | * @qpt: QP table | |
1260 | * @qpn: queue pair number to free | |
1261 | */ | |
1262 | static void rvt_free_qpn(struct rvt_qpn_table *qpt, u32 qpn) | |
1263 | { | |
1264 | struct rvt_qpn_map *map; | |
1265 | ||
1266 | map = qpt->map + qpn / RVT_BITS_PER_PAGE; | |
1267 | if (map->page) | |
1268 | clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page); | |
1269 | } | |
1270 | ||
b518d3e6 DD |
1271 | /** |
1272 | * rvt_destroy_qp - destroy a queue pair | |
1273 | * @ibqp: the queue pair to destroy | |
1274 | * | |
b518d3e6 DD |
1275 | * Note that this can be called while the QP is actively sending or |
1276 | * receiving! | |
90793f71 DD |
1277 | * |
1278 | * Return: 0 on success. | |
b518d3e6 DD |
1279 | */ |
1280 | int rvt_destroy_qp(struct ib_qp *ibqp) | |
1281 | { | |
5a17ad11 DD |
1282 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1283 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
b518d3e6 | 1284 | |
5a17ad11 | 1285 | spin_lock_irq(&qp->r_lock); |
46a80d62 | 1286 | spin_lock(&qp->s_hlock); |
5a17ad11 DD |
1287 | spin_lock(&qp->s_lock); |
1288 | rvt_reset_qp(rdi, qp, ibqp->qp_type); | |
1289 | spin_unlock(&qp->s_lock); | |
46a80d62 | 1290 | spin_unlock(&qp->s_hlock); |
5a17ad11 DD |
1291 | spin_unlock_irq(&qp->r_lock); |
1292 | ||
1293 | /* qpn is now available for use again */ | |
1294 | rvt_free_qpn(&rdi->qp_dev->qpn_table, qp->ibqp.qp_num); | |
1295 | ||
1296 | spin_lock(&rdi->n_qps_lock); | |
1297 | rdi->n_qps_allocated--; | |
bfee5e32 VM |
1298 | if (qp->ibqp.qp_type == IB_QPT_RC) { |
1299 | rdi->n_rc_qps--; | |
1300 | rdi->busy_jiffies = rdi->n_rc_qps / RC_QP_SCALING_INTERVAL; | |
1301 | } | |
5a17ad11 DD |
1302 | spin_unlock(&rdi->n_qps_lock); |
1303 | ||
1304 | if (qp->ip) | |
1305 | kref_put(&qp->ip->ref, rvt_release_mmap_info); | |
1306 | else | |
1307 | vfree(qp->r_rq.wq); | |
1308 | vfree(qp->s_wq); | |
1309 | rdi->driver_f.qp_priv_free(rdi, qp); | |
8b103e9c | 1310 | kfree(qp->s_ack_queue); |
5a17ad11 DD |
1311 | kfree(qp); |
1312 | return 0; | |
b518d3e6 DD |
1313 | } |
1314 | ||
90793f71 DD |
1315 | /** |
1316 | * rvt_query_qp - query an ipbq | |
1317 | * @ibqp: IB qp to query | |
1318 | * @attr: attr struct to fill in | |
1319 | * @attr_mask: attr mask ignored | |
1320 | * @init_attr: struct to fill in | |
1321 | * | |
1322 | * Return: always 0 | |
1323 | */ | |
b518d3e6 DD |
1324 | int rvt_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, |
1325 | int attr_mask, struct ib_qp_init_attr *init_attr) | |
1326 | { | |
74d2d500 HC |
1327 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1328 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
1329 | ||
1330 | attr->qp_state = qp->state; | |
1331 | attr->cur_qp_state = attr->qp_state; | |
1332 | attr->path_mtu = qp->path_mtu; | |
1333 | attr->path_mig_state = qp->s_mig_state; | |
1334 | attr->qkey = qp->qkey; | |
1335 | attr->rq_psn = qp->r_psn & rdi->dparms.psn_mask; | |
1336 | attr->sq_psn = qp->s_next_psn & rdi->dparms.psn_mask; | |
1337 | attr->dest_qp_num = qp->remote_qpn; | |
1338 | attr->qp_access_flags = qp->qp_access_flags; | |
856cc4c2 MM |
1339 | attr->cap.max_send_wr = qp->s_size - 1 - |
1340 | rdi->dparms.reserved_operations; | |
74d2d500 HC |
1341 | attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1; |
1342 | attr->cap.max_send_sge = qp->s_max_sge; | |
1343 | attr->cap.max_recv_sge = qp->r_rq.max_sge; | |
1344 | attr->cap.max_inline_data = 0; | |
1345 | attr->ah_attr = qp->remote_ah_attr; | |
1346 | attr->alt_ah_attr = qp->alt_ah_attr; | |
1347 | attr->pkey_index = qp->s_pkey_index; | |
1348 | attr->alt_pkey_index = qp->s_alt_pkey_index; | |
1349 | attr->en_sqd_async_notify = 0; | |
1350 | attr->sq_draining = qp->s_draining; | |
1351 | attr->max_rd_atomic = qp->s_max_rd_atomic; | |
1352 | attr->max_dest_rd_atomic = qp->r_max_rd_atomic; | |
1353 | attr->min_rnr_timer = qp->r_min_rnr_timer; | |
1354 | attr->port_num = qp->port_num; | |
1355 | attr->timeout = qp->timeout; | |
1356 | attr->retry_cnt = qp->s_retry_cnt; | |
1357 | attr->rnr_retry = qp->s_rnr_retry_cnt; | |
1358 | attr->alt_port_num = qp->alt_ah_attr.port_num; | |
1359 | attr->alt_timeout = qp->alt_timeout; | |
1360 | ||
1361 | init_attr->event_handler = qp->ibqp.event_handler; | |
1362 | init_attr->qp_context = qp->ibqp.qp_context; | |
1363 | init_attr->send_cq = qp->ibqp.send_cq; | |
1364 | init_attr->recv_cq = qp->ibqp.recv_cq; | |
1365 | init_attr->srq = qp->ibqp.srq; | |
1366 | init_attr->cap = attr->cap; | |
1367 | if (qp->s_flags & RVT_S_SIGNAL_REQ_WR) | |
1368 | init_attr->sq_sig_type = IB_SIGNAL_REQ_WR; | |
1369 | else | |
1370 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
1371 | init_attr->qp_type = qp->ibqp.qp_type; | |
1372 | init_attr->port_num = qp->port_num; | |
1373 | return 0; | |
b518d3e6 | 1374 | } |
8cf4020b DD |
1375 | |
1376 | /** | |
1377 | * rvt_post_receive - post a receive on a QP | |
1378 | * @ibqp: the QP to post the receive on | |
1379 | * @wr: the WR to post | |
1380 | * @bad_wr: the first bad WR is put here | |
1381 | * | |
1382 | * This may be called from interrupt context. | |
90793f71 DD |
1383 | * |
1384 | * Return: 0 on success otherwise errno | |
8cf4020b DD |
1385 | */ |
1386 | int rvt_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, | |
1387 | struct ib_recv_wr **bad_wr) | |
1388 | { | |
120bdafa DD |
1389 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1390 | struct rvt_rwq *wq = qp->r_rq.wq; | |
1391 | unsigned long flags; | |
000a830e AE |
1392 | int qp_err_flush = (ib_rvt_state_ops[qp->state] & RVT_FLUSH_RECV) && |
1393 | !qp->ibqp.srq; | |
8cf4020b | 1394 | |
120bdafa DD |
1395 | /* Check that state is OK to post receive. */ |
1396 | if (!(ib_rvt_state_ops[qp->state] & RVT_POST_RECV_OK) || !wq) { | |
1397 | *bad_wr = wr; | |
1398 | return -EINVAL; | |
1399 | } | |
1400 | ||
1401 | for (; wr; wr = wr->next) { | |
1402 | struct rvt_rwqe *wqe; | |
1403 | u32 next; | |
1404 | int i; | |
1405 | ||
1406 | if ((unsigned)wr->num_sge > qp->r_rq.max_sge) { | |
1407 | *bad_wr = wr; | |
1408 | return -EINVAL; | |
1409 | } | |
1410 | ||
1411 | spin_lock_irqsave(&qp->r_rq.lock, flags); | |
1412 | next = wq->head + 1; | |
1413 | if (next >= qp->r_rq.size) | |
1414 | next = 0; | |
1415 | if (next == wq->tail) { | |
1416 | spin_unlock_irqrestore(&qp->r_rq.lock, flags); | |
1417 | *bad_wr = wr; | |
1418 | return -ENOMEM; | |
1419 | } | |
000a830e AE |
1420 | if (unlikely(qp_err_flush)) { |
1421 | struct ib_wc wc; | |
1422 | ||
1423 | memset(&wc, 0, sizeof(wc)); | |
1424 | wc.qp = &qp->ibqp; | |
1425 | wc.opcode = IB_WC_RECV; | |
1426 | wc.wr_id = wr->wr_id; | |
1427 | wc.status = IB_WC_WR_FLUSH_ERR; | |
1428 | rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1); | |
1429 | } else { | |
1430 | wqe = rvt_get_rwqe_ptr(&qp->r_rq, wq->head); | |
1431 | wqe->wr_id = wr->wr_id; | |
1432 | wqe->num_sge = wr->num_sge; | |
1433 | for (i = 0; i < wr->num_sge; i++) | |
1434 | wqe->sg_list[i] = wr->sg_list[i]; | |
1435 | /* | |
1436 | * Make sure queue entry is written | |
1437 | * before the head index. | |
1438 | */ | |
1439 | smp_wmb(); | |
1440 | wq->head = next; | |
1441 | } | |
120bdafa DD |
1442 | spin_unlock_irqrestore(&qp->r_rq.lock, flags); |
1443 | } | |
1444 | return 0; | |
8cf4020b DD |
1445 | } |
1446 | ||
46a80d62 | 1447 | /** |
afcf8f76 MM |
1448 | * rvt_qp_valid_operation - validate post send wr request |
1449 | * @qp - the qp | |
1450 | * @post-parms - the post send table for the driver | |
1451 | * @wr - the work request | |
46a80d62 | 1452 | * |
afcf8f76 MM |
1453 | * The routine validates the operation based on the |
1454 | * validation table an returns the length of the operation | |
1455 | * which can extend beyond the ib_send_bw. Operation | |
1456 | * dependent flags key atomic operation validation. | |
1457 | * | |
1458 | * There is an exception for UD qps that validates the pd and | |
1459 | * overrides the length to include the additional UD specific | |
1460 | * length. | |
1461 | * | |
1462 | * Returns a negative error or the length of the work request | |
1463 | * for building the swqe. | |
1464 | */ | |
1465 | static inline int rvt_qp_valid_operation( | |
1466 | struct rvt_qp *qp, | |
1467 | const struct rvt_operation_params *post_parms, | |
1468 | struct ib_send_wr *wr) | |
1469 | { | |
1470 | int len; | |
1471 | ||
1472 | if (wr->opcode >= RVT_OPERATION_MAX || !post_parms[wr->opcode].length) | |
1473 | return -EINVAL; | |
1474 | if (!(post_parms[wr->opcode].qpt_support & BIT(qp->ibqp.qp_type))) | |
1475 | return -EINVAL; | |
1476 | if ((post_parms[wr->opcode].flags & RVT_OPERATION_PRIV) && | |
1477 | ibpd_to_rvtpd(qp->ibqp.pd)->user) | |
1478 | return -EINVAL; | |
1479 | if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC_SGE && | |
1480 | (wr->num_sge == 0 || | |
1481 | wr->sg_list[0].length < sizeof(u64) || | |
1482 | wr->sg_list[0].addr & (sizeof(u64) - 1))) | |
1483 | return -EINVAL; | |
1484 | if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC && | |
1485 | !qp->s_max_rd_atomic) | |
1486 | return -EINVAL; | |
1487 | len = post_parms[wr->opcode].length; | |
1488 | /* UD specific */ | |
1489 | if (qp->ibqp.qp_type != IB_QPT_UC && | |
1490 | qp->ibqp.qp_type != IB_QPT_RC) { | |
1491 | if (qp->ibqp.pd != ud_wr(wr)->ah->pd) | |
1492 | return -EINVAL; | |
1493 | len = sizeof(struct ib_ud_wr); | |
1494 | } | |
1495 | return len; | |
1496 | } | |
1497 | ||
1498 | /** | |
856cc4c2 | 1499 | * rvt_qp_is_avail - determine queue capacity |
46a80d62 | 1500 | * @qp - the qp |
856cc4c2 MM |
1501 | * @rdi - the rdmavt device |
1502 | * @reserved_op - is reserved operation | |
46a80d62 MM |
1503 | * |
1504 | * This assumes the s_hlock is held but the s_last | |
1505 | * qp variable is uncontrolled. | |
afcf8f76 | 1506 | * |
856cc4c2 MM |
1507 | * For non reserved operations, the qp->s_avail |
1508 | * may be changed. | |
1509 | * | |
1510 | * The return value is zero or a -ENOMEM. | |
46a80d62 | 1511 | */ |
856cc4c2 MM |
1512 | static inline int rvt_qp_is_avail( |
1513 | struct rvt_qp *qp, | |
1514 | struct rvt_dev_info *rdi, | |
1515 | bool reserved_op) | |
46a80d62 MM |
1516 | { |
1517 | u32 slast; | |
856cc4c2 MM |
1518 | u32 avail; |
1519 | u32 reserved_used; | |
1520 | ||
1521 | /* see rvt_qp_wqe_unreserve() */ | |
1522 | smp_mb__before_atomic(); | |
1523 | reserved_used = atomic_read(&qp->s_reserved_used); | |
1524 | if (unlikely(reserved_op)) { | |
1525 | /* see rvt_qp_wqe_unreserve() */ | |
1526 | smp_mb__before_atomic(); | |
1527 | if (reserved_used >= rdi->dparms.reserved_operations) | |
1528 | return -ENOMEM; | |
1529 | return 0; | |
1530 | } | |
1531 | /* non-reserved operations */ | |
1532 | if (likely(qp->s_avail)) | |
1533 | return 0; | |
46a80d62 MM |
1534 | smp_read_barrier_depends(); /* see rc.c */ |
1535 | slast = ACCESS_ONCE(qp->s_last); | |
1536 | if (qp->s_head >= slast) | |
856cc4c2 | 1537 | avail = qp->s_size - (qp->s_head - slast); |
46a80d62 | 1538 | else |
856cc4c2 MM |
1539 | avail = slast - qp->s_head; |
1540 | ||
1541 | /* see rvt_qp_wqe_unreserve() */ | |
1542 | smp_mb__before_atomic(); | |
1543 | reserved_used = atomic_read(&qp->s_reserved_used); | |
1544 | avail = avail - 1 - | |
1545 | (rdi->dparms.reserved_operations - reserved_used); | |
1546 | /* insure we don't assign a negative s_avail */ | |
1547 | if ((s32)avail <= 0) | |
1548 | return -ENOMEM; | |
1549 | qp->s_avail = avail; | |
1550 | if (WARN_ON(qp->s_avail > | |
1551 | (qp->s_size - 1 - rdi->dparms.reserved_operations))) | |
1552 | rvt_pr_err(rdi, | |
1553 | "More avail entries than QP RB size.\nQP: %u, size: %u, avail: %u\nhead: %u, tail: %u, cur: %u, acked: %u, last: %u", | |
1554 | qp->ibqp.qp_num, qp->s_size, qp->s_avail, | |
1555 | qp->s_head, qp->s_tail, qp->s_cur, | |
1556 | qp->s_acked, qp->s_last); | |
1557 | return 0; | |
46a80d62 MM |
1558 | } |
1559 | ||
bfbac097 DD |
1560 | /** |
1561 | * rvt_post_one_wr - post one RC, UC, or UD send work request | |
1562 | * @qp: the QP to post on | |
1563 | * @wr: the work request to send | |
1564 | */ | |
91702b4a MM |
1565 | static int rvt_post_one_wr(struct rvt_qp *qp, |
1566 | struct ib_send_wr *wr, | |
1567 | int *call_send) | |
bfbac097 DD |
1568 | { |
1569 | struct rvt_swqe *wqe; | |
1570 | u32 next; | |
1571 | int i; | |
1572 | int j; | |
1573 | int acc; | |
1574 | struct rvt_lkey_table *rkt; | |
1575 | struct rvt_pd *pd; | |
1576 | struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); | |
46a80d62 MM |
1577 | u8 log_pmtu; |
1578 | int ret; | |
2821c509 | 1579 | size_t cplen; |
856cc4c2 | 1580 | bool reserved_op; |
d9b13c20 | 1581 | int local_ops_delayed = 0; |
bfbac097 | 1582 | |
afcf8f76 MM |
1583 | BUILD_BUG_ON(IB_QPT_MAX >= (sizeof(u32) * BITS_PER_BYTE)); |
1584 | ||
bfbac097 DD |
1585 | /* IB spec says that num_sge == 0 is OK. */ |
1586 | if (unlikely(wr->num_sge > qp->s_max_sge)) | |
1587 | return -EINVAL; | |
1588 | ||
2821c509 MM |
1589 | ret = rvt_qp_valid_operation(qp, rdi->post_parms, wr); |
1590 | if (ret < 0) | |
1591 | return ret; | |
1592 | cplen = ret; | |
1593 | ||
d9f87239 | 1594 | /* |
d9b13c20 JX |
1595 | * Local operations include fast register and local invalidate. |
1596 | * Fast register needs to be processed immediately because the | |
1597 | * registered lkey may be used by following work requests and the | |
1598 | * lkey needs to be valid at the time those requests are posted. | |
1599 | * Local invalidate can be processed immediately if fencing is | |
1600 | * not required and no previous local invalidate ops are pending. | |
1601 | * Signaled local operations that have been processed immediately | |
1602 | * need to have requests with "completion only" flags set posted | |
1603 | * to the send queue in order to generate completions. | |
d9f87239 | 1604 | */ |
d9b13c20 | 1605 | if ((rdi->post_parms[wr->opcode].flags & RVT_OPERATION_LOCAL)) { |
d9f87239 JX |
1606 | switch (wr->opcode) { |
1607 | case IB_WR_REG_MR: | |
d9b13c20 JX |
1608 | ret = rvt_fast_reg_mr(qp, |
1609 | reg_wr(wr)->mr, | |
1610 | reg_wr(wr)->key, | |
1611 | reg_wr(wr)->access); | |
1612 | if (ret || !(wr->send_flags & IB_SEND_SIGNALED)) | |
1613 | return ret; | |
1614 | break; | |
d9f87239 | 1615 | case IB_WR_LOCAL_INV: |
d9b13c20 JX |
1616 | if ((wr->send_flags & IB_SEND_FENCE) || |
1617 | atomic_read(&qp->local_ops_pending)) { | |
1618 | local_ops_delayed = 1; | |
1619 | } else { | |
1620 | ret = rvt_invalidate_rkey( | |
1621 | qp, wr->ex.invalidate_rkey); | |
1622 | if (ret || !(wr->send_flags & IB_SEND_SIGNALED)) | |
1623 | return ret; | |
1624 | } | |
1625 | break; | |
d9f87239 JX |
1626 | default: |
1627 | return -EINVAL; | |
1628 | } | |
1629 | } | |
1630 | ||
856cc4c2 MM |
1631 | reserved_op = rdi->post_parms[wr->opcode].flags & |
1632 | RVT_OPERATION_USE_RESERVE; | |
46a80d62 | 1633 | /* check for avail */ |
856cc4c2 MM |
1634 | ret = rvt_qp_is_avail(qp, rdi, reserved_op); |
1635 | if (ret) | |
1636 | return ret; | |
bfbac097 DD |
1637 | next = qp->s_head + 1; |
1638 | if (next >= qp->s_size) | |
1639 | next = 0; | |
60c30f57 | 1640 | |
bfbac097 DD |
1641 | rkt = &rdi->lkey_table; |
1642 | pd = ibpd_to_rvtpd(qp->ibqp.pd); | |
1643 | wqe = rvt_get_swqe_ptr(qp, qp->s_head); | |
1644 | ||
2821c509 MM |
1645 | /* cplen has length from above */ |
1646 | memcpy(&wqe->wr, wr, cplen); | |
bfbac097 DD |
1647 | |
1648 | wqe->length = 0; | |
1649 | j = 0; | |
1650 | if (wr->num_sge) { | |
1651 | acc = wr->opcode >= IB_WR_RDMA_READ ? | |
1652 | IB_ACCESS_LOCAL_WRITE : 0; | |
1653 | for (i = 0; i < wr->num_sge; i++) { | |
1654 | u32 length = wr->sg_list[i].length; | |
1655 | int ok; | |
1656 | ||
1657 | if (length == 0) | |
1658 | continue; | |
1659 | ok = rvt_lkey_ok(rkt, pd, &wqe->sg_list[j], | |
1660 | &wr->sg_list[i], acc); | |
46a80d62 MM |
1661 | if (!ok) { |
1662 | ret = -EINVAL; | |
bfbac097 | 1663 | goto bail_inval_free; |
46a80d62 | 1664 | } |
bfbac097 DD |
1665 | wqe->length += length; |
1666 | j++; | |
1667 | } | |
1668 | wqe->wr.num_sge = j; | |
1669 | } | |
46a80d62 MM |
1670 | |
1671 | /* general part of wqe valid - allow for driver checks */ | |
1672 | if (rdi->driver_f.check_send_wqe) { | |
1673 | ret = rdi->driver_f.check_send_wqe(qp, wqe); | |
91702b4a | 1674 | if (ret < 0) |
bfbac097 | 1675 | goto bail_inval_free; |
91702b4a MM |
1676 | if (ret) |
1677 | *call_send = ret; | |
46a80d62 MM |
1678 | } |
1679 | ||
1680 | log_pmtu = qp->log_pmtu; | |
1681 | if (qp->ibqp.qp_type != IB_QPT_UC && | |
1682 | qp->ibqp.qp_type != IB_QPT_RC) { | |
1683 | struct rvt_ah *ah = ibah_to_rvtah(wqe->ud_wr.ah); | |
1684 | ||
1685 | log_pmtu = ah->log_pmtu; | |
bfbac097 DD |
1686 | atomic_inc(&ibah_to_rvtah(ud_wr(wr)->ah)->refcount); |
1687 | } | |
46a80d62 | 1688 | |
d9f87239 | 1689 | if (rdi->post_parms[wr->opcode].flags & RVT_OPERATION_LOCAL) { |
d9b13c20 JX |
1690 | if (local_ops_delayed) |
1691 | atomic_inc(&qp->local_ops_pending); | |
1692 | else | |
1693 | wqe->wr.send_flags |= RVT_SEND_COMPLETION_ONLY; | |
d9f87239 JX |
1694 | wqe->ssn = 0; |
1695 | wqe->psn = 0; | |
1696 | wqe->lpsn = 0; | |
1697 | } else { | |
1698 | wqe->ssn = qp->s_ssn++; | |
1699 | wqe->psn = qp->s_next_psn; | |
1700 | wqe->lpsn = wqe->psn + | |
1701 | (wqe->length ? | |
1702 | ((wqe->length - 1) >> log_pmtu) : | |
1703 | 0); | |
1704 | qp->s_next_psn = wqe->lpsn + 1; | |
1705 | } | |
e16689e4 | 1706 | trace_rvt_post_one_wr(qp, wqe); |
856cc4c2 MM |
1707 | if (unlikely(reserved_op)) |
1708 | rvt_qp_wqe_reserve(qp, wqe); | |
1709 | else | |
1710 | qp->s_avail--; | |
46a80d62 | 1711 | smp_wmb(); /* see request builders */ |
bfbac097 DD |
1712 | qp->s_head = next; |
1713 | ||
1714 | return 0; | |
1715 | ||
1716 | bail_inval_free: | |
1717 | /* release mr holds */ | |
1718 | while (j) { | |
1719 | struct rvt_sge *sge = &wqe->sg_list[--j]; | |
1720 | ||
1721 | rvt_put_mr(sge->mr); | |
1722 | } | |
46a80d62 | 1723 | return ret; |
bfbac097 DD |
1724 | } |
1725 | ||
8cf4020b DD |
1726 | /** |
1727 | * rvt_post_send - post a send on a QP | |
1728 | * @ibqp: the QP to post the send on | |
1729 | * @wr: the list of work requests to post | |
1730 | * @bad_wr: the first bad WR is put here | |
1731 | * | |
1732 | * This may be called from interrupt context. | |
90793f71 DD |
1733 | * |
1734 | * Return: 0 on success else errno | |
8cf4020b DD |
1735 | */ |
1736 | int rvt_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, | |
1737 | struct ib_send_wr **bad_wr) | |
1738 | { | |
bfbac097 DD |
1739 | struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); |
1740 | struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); | |
1741 | unsigned long flags = 0; | |
1742 | int call_send; | |
1743 | unsigned nreq = 0; | |
1744 | int err = 0; | |
1745 | ||
46a80d62 | 1746 | spin_lock_irqsave(&qp->s_hlock, flags); |
bfbac097 | 1747 | |
8cf4020b | 1748 | /* |
bfbac097 DD |
1749 | * Ensure QP state is such that we can send. If not bail out early, |
1750 | * there is no need to do this every time we post a send. | |
8cf4020b | 1751 | */ |
bfbac097 | 1752 | if (unlikely(!(ib_rvt_state_ops[qp->state] & RVT_POST_SEND_OK))) { |
46a80d62 | 1753 | spin_unlock_irqrestore(&qp->s_hlock, flags); |
bfbac097 DD |
1754 | return -EINVAL; |
1755 | } | |
8cf4020b | 1756 | |
bfbac097 DD |
1757 | /* |
1758 | * If the send queue is empty, and we only have a single WR then just go | |
1759 | * ahead and kick the send engine into gear. Otherwise we will always | |
1760 | * just schedule the send to happen later. | |
1761 | */ | |
1762 | call_send = qp->s_head == ACCESS_ONCE(qp->s_last) && !wr->next; | |
1763 | ||
1764 | for (; wr; wr = wr->next) { | |
91702b4a | 1765 | err = rvt_post_one_wr(qp, wr, &call_send); |
bfbac097 DD |
1766 | if (unlikely(err)) { |
1767 | *bad_wr = wr; | |
1768 | goto bail; | |
1769 | } | |
1770 | nreq++; | |
1771 | } | |
1772 | bail: | |
46a80d62 MM |
1773 | spin_unlock_irqrestore(&qp->s_hlock, flags); |
1774 | if (nreq) { | |
1775 | if (call_send) | |
46a80d62 | 1776 | rdi->driver_f.do_send(qp); |
e6d2e017 JJ |
1777 | else |
1778 | rdi->driver_f.schedule_send_no_lock(qp); | |
46a80d62 | 1779 | } |
bfbac097 | 1780 | return err; |
8cf4020b DD |
1781 | } |
1782 | ||
1783 | /** | |
1784 | * rvt_post_srq_receive - post a receive on a shared receive queue | |
1785 | * @ibsrq: the SRQ to post the receive on | |
1786 | * @wr: the list of work requests to post | |
1787 | * @bad_wr: A pointer to the first WR to cause a problem is put here | |
1788 | * | |
1789 | * This may be called from interrupt context. | |
90793f71 DD |
1790 | * |
1791 | * Return: 0 on success else errno | |
8cf4020b DD |
1792 | */ |
1793 | int rvt_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, | |
1794 | struct ib_recv_wr **bad_wr) | |
1795 | { | |
b8f881b9 JJ |
1796 | struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq); |
1797 | struct rvt_rwq *wq; | |
1798 | unsigned long flags; | |
1799 | ||
1800 | for (; wr; wr = wr->next) { | |
1801 | struct rvt_rwqe *wqe; | |
1802 | u32 next; | |
1803 | int i; | |
1804 | ||
1805 | if ((unsigned)wr->num_sge > srq->rq.max_sge) { | |
1806 | *bad_wr = wr; | |
1807 | return -EINVAL; | |
1808 | } | |
1809 | ||
1810 | spin_lock_irqsave(&srq->rq.lock, flags); | |
1811 | wq = srq->rq.wq; | |
1812 | next = wq->head + 1; | |
1813 | if (next >= srq->rq.size) | |
1814 | next = 0; | |
1815 | if (next == wq->tail) { | |
1816 | spin_unlock_irqrestore(&srq->rq.lock, flags); | |
1817 | *bad_wr = wr; | |
1818 | return -ENOMEM; | |
1819 | } | |
1820 | ||
1821 | wqe = rvt_get_rwqe_ptr(&srq->rq, wq->head); | |
1822 | wqe->wr_id = wr->wr_id; | |
1823 | wqe->num_sge = wr->num_sge; | |
1824 | for (i = 0; i < wr->num_sge; i++) | |
1825 | wqe->sg_list[i] = wr->sg_list[i]; | |
1826 | /* Make sure queue entry is written before the head index. */ | |
1827 | smp_wmb(); | |
1828 | wq->head = next; | |
1829 | spin_unlock_irqrestore(&srq->rq.lock, flags); | |
1830 | } | |
1831 | return 0; | |
8cf4020b | 1832 | } |