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Staging: zram: fix up some sysfs attribute permissions
[zen-stable.git] / drivers / infiniband / hw / ehca / ehca_qp.c
blob32fb34201aba1b27d0ee2910ba70d958f46d5eb2
1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * QP functions
5 *
6 * Authors: Joachim Fenkes <fenkes@de.ibm.com>
7 * Stefan Roscher <stefan.roscher@de.ibm.com>
8 * Waleri Fomin <fomin@de.ibm.com>
9 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
10 * Reinhard Ernst <rernst@de.ibm.com>
11 * Heiko J Schick <schickhj@de.ibm.com>
12 *
13 * Copyright (c) 2005 IBM Corporation
14 *
15 * All rights reserved.
16 *
17 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
18 * BSD.
19 *
20 * OpenIB BSD License
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions are met:
24 *
25 * Redistributions of source code must retain the above copyright notice, this
26 * list of conditions and the following disclaimer.
27 *
28 * Redistributions in binary form must reproduce the above copyright notice,
29 * this list of conditions and the following disclaimer in the documentation
30 * and/or other materials
31 * provided with the distribution.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
34 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
37 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
38 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
39 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
40 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
41 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
43 * POSSIBILITY OF SUCH DAMAGE.
44 */
45
46 #include <linux/slab.h>
47
48 #include "ehca_classes.h"
49 #include "ehca_tools.h"
50 #include "ehca_qes.h"
51 #include "ehca_iverbs.h"
52 #include "hcp_if.h"
53 #include "hipz_fns.h"
54
55 static struct kmem_cache *qp_cache;
56
57 /*
58 * attributes not supported by query qp
59 */
60 #define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_ACCESS_FLAGS | \
61 IB_QP_EN_SQD_ASYNC_NOTIFY)
62
63 /*
64 * ehca (internal) qp state values
65 */
66 enum ehca_qp_state {
67 EHCA_QPS_RESET = 1,
68 EHCA_QPS_INIT = 2,
69 EHCA_QPS_RTR = 3,
70 EHCA_QPS_RTS = 5,
71 EHCA_QPS_SQD = 6,
72 EHCA_QPS_SQE = 8,
73 EHCA_QPS_ERR = 128
74 };
75
76 /*
77 * qp state transitions as defined by IB Arch Rel 1.1 page 431
78 */
79 enum ib_qp_statetrans {
80 IB_QPST_ANY2RESET,
81 IB_QPST_ANY2ERR,
82 IB_QPST_RESET2INIT,
83 IB_QPST_INIT2RTR,
84 IB_QPST_INIT2INIT,
85 IB_QPST_RTR2RTS,
86 IB_QPST_RTS2SQD,
87 IB_QPST_RTS2RTS,
88 IB_QPST_SQD2RTS,
89 IB_QPST_SQE2RTS,
90 IB_QPST_SQD2SQD,
91 IB_QPST_MAX /* nr of transitions, this must be last!!! */
92 };
93
94 /*
95 * ib2ehca_qp_state maps IB to ehca qp_state
96 * returns ehca qp state corresponding to given ib qp state
97 */
98 static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
99 {
100 switch (ib_qp_state) {
101 case IB_QPS_RESET:
102 return EHCA_QPS_RESET;
103 case IB_QPS_INIT:
104 return EHCA_QPS_INIT;
105 case IB_QPS_RTR:
106 return EHCA_QPS_RTR;
107 case IB_QPS_RTS:
108 return EHCA_QPS_RTS;
109 case IB_QPS_SQD:
110 return EHCA_QPS_SQD;
111 case IB_QPS_SQE:
112 return EHCA_QPS_SQE;
113 case IB_QPS_ERR:
114 return EHCA_QPS_ERR;
115 default:
116 ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
117 return -EINVAL;
118 }
119 }
120
121 /*
122 * ehca2ib_qp_state maps ehca to IB qp_state
123 * returns ib qp state corresponding to given ehca qp state
124 */
125 static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
126 ehca_qp_state)
127 {
128 switch (ehca_qp_state) {
129 case EHCA_QPS_RESET:
130 return IB_QPS_RESET;
131 case EHCA_QPS_INIT:
132 return IB_QPS_INIT;
133 case EHCA_QPS_RTR:
134 return IB_QPS_RTR;
135 case EHCA_QPS_RTS:
136 return IB_QPS_RTS;
137 case EHCA_QPS_SQD:
138 return IB_QPS_SQD;
139 case EHCA_QPS_SQE:
140 return IB_QPS_SQE;
141 case EHCA_QPS_ERR:
142 return IB_QPS_ERR;
143 default:
144 ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
145 return -EINVAL;
146 }
147 }
148
149 /*
150 * ehca_qp_type used as index for req_attr and opt_attr of
151 * struct ehca_modqp_statetrans
152 */
153 enum ehca_qp_type {
154 QPT_RC = 0,
155 QPT_UC = 1,
156 QPT_UD = 2,
157 QPT_SQP = 3,
158 QPT_MAX
159 };
160
161 /*
162 * ib2ehcaqptype maps Ib to ehca qp_type
163 * returns ehca qp type corresponding to ib qp type
164 */
165 static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
166 {
167 switch (ibqptype) {
168 case IB_QPT_SMI:
169 case IB_QPT_GSI:
170 return QPT_SQP;
171 case IB_QPT_RC:
172 return QPT_RC;
173 case IB_QPT_UC:
174 return QPT_UC;
175 case IB_QPT_UD:
176 return QPT_UD;
177 default:
178 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
179 return -EINVAL;
180 }
181 }
182
183 static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
184 int ib_tostate)
185 {
186 int index = -EINVAL;
187 switch (ib_tostate) {
188 case IB_QPS_RESET:
189 index = IB_QPST_ANY2RESET;
190 break;
191 case IB_QPS_INIT:
192 switch (ib_fromstate) {
193 case IB_QPS_RESET:
194 index = IB_QPST_RESET2INIT;
195 break;
196 case IB_QPS_INIT:
197 index = IB_QPST_INIT2INIT;
198 break;
199 }
200 break;
201 case IB_QPS_RTR:
202 if (ib_fromstate == IB_QPS_INIT)
203 index = IB_QPST_INIT2RTR;
204 break;
205 case IB_QPS_RTS:
206 switch (ib_fromstate) {
207 case IB_QPS_RTR:
208 index = IB_QPST_RTR2RTS;
209 break;
210 case IB_QPS_RTS:
211 index = IB_QPST_RTS2RTS;
212 break;
213 case IB_QPS_SQD:
214 index = IB_QPST_SQD2RTS;
215 break;
216 case IB_QPS_SQE:
217 index = IB_QPST_SQE2RTS;
218 break;
219 }
220 break;
221 case IB_QPS_SQD:
222 if (ib_fromstate == IB_QPS_RTS)
223 index = IB_QPST_RTS2SQD;
224 break;
225 case IB_QPS_SQE:
226 break;
227 case IB_QPS_ERR:
228 index = IB_QPST_ANY2ERR;
229 break;
230 default:
231 break;
232 }
233 return index;
234 }
235
236 /*
237 * ibqptype2servicetype returns hcp service type corresponding to given
238 * ib qp type used by create_qp()
239 */
240 static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
241 {
242 switch (ibqptype) {
243 case IB_QPT_SMI:
244 case IB_QPT_GSI:
245 return ST_UD;
246 case IB_QPT_RC:
247 return ST_RC;
248 case IB_QPT_UC:
249 return ST_UC;
250 case IB_QPT_UD:
251 return ST_UD;
252 case IB_QPT_RAW_IPV6:
253 return -EINVAL;
254 case IB_QPT_RAW_ETHERTYPE:
255 return -EINVAL;
256 default:
257 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
258 return -EINVAL;
259 }
260 }
261
262 /*
263 * init userspace queue info from ipz_queue data
264 */
265 static inline void queue2resp(struct ipzu_queue_resp *resp,
266 struct ipz_queue *queue)
267 {
268 resp->qe_size = queue->qe_size;
269 resp->act_nr_of_sg = queue->act_nr_of_sg;
270 resp->queue_length = queue->queue_length;
271 resp->pagesize = queue->pagesize;
272 resp->toggle_state = queue->toggle_state;
273 resp->offset = queue->offset;
274 }
275
276 /*
277 * init_qp_queue initializes/constructs r/squeue and registers queue pages.
278 */
279 static inline int init_qp_queue(struct ehca_shca *shca,
280 struct ehca_pd *pd,
281 struct ehca_qp *my_qp,
282 struct ipz_queue *queue,
283 int q_type,
284 u64 expected_hret,
285 struct ehca_alloc_queue_parms *parms,
286 int wqe_size)
287 {
288 int ret, cnt, ipz_rc, nr_q_pages;
289 void *vpage;
290 u64 rpage, h_ret;
291 struct ib_device *ib_dev = &shca->ib_device;
292 struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
293
294 if (!parms->queue_size)
295 return 0;
296
297 if (parms->is_small) {
298 nr_q_pages = 1;
299 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
300 128 << parms->page_size,
301 wqe_size, parms->act_nr_sges, 1);
302 } else {
303 nr_q_pages = parms->queue_size;
304 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
305 EHCA_PAGESIZE, wqe_size,
306 parms->act_nr_sges, 0);
307 }
308
309 if (!ipz_rc) {
310 ehca_err(ib_dev, "Cannot allocate page for queue. ipz_rc=%i",
311 ipz_rc);
312 return -EBUSY;
313 }
314
315 /* register queue pages */
316 for (cnt = 0; cnt < nr_q_pages; cnt++) {
317 vpage = ipz_qpageit_get_inc(queue);
318 if (!vpage) {
319 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
320 "failed p_vpage= %p", vpage);
321 ret = -EINVAL;
322 goto init_qp_queue1;
323 }
324 rpage = virt_to_abs(vpage);
325
326 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
327 my_qp->ipz_qp_handle,
328 NULL, 0, q_type,
329 rpage, parms->is_small ? 0 : 1,
330 my_qp->galpas.kernel);
331 if (cnt == (nr_q_pages - 1)) { /* last page! */
332 if (h_ret != expected_hret) {
333 ehca_err(ib_dev, "hipz_qp_register_rpage() "
334 "h_ret=%lli", h_ret);
335 ret = ehca2ib_return_code(h_ret);
336 goto init_qp_queue1;
337 }
338 vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
339 if (vpage) {
340 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
341 "should not succeed vpage=%p", vpage);
342 ret = -EINVAL;
343 goto init_qp_queue1;
344 }
345 } else {
346 if (h_ret != H_PAGE_REGISTERED) {
347 ehca_err(ib_dev, "hipz_qp_register_rpage() "
348 "h_ret=%lli", h_ret);
349 ret = ehca2ib_return_code(h_ret);
350 goto init_qp_queue1;
351 }
352 }
353 }
354
355 ipz_qeit_reset(queue);
356
357 return 0;
358
359 init_qp_queue1:
360 ipz_queue_dtor(pd, queue);
361 return ret;
362 }
363
364 static inline int ehca_calc_wqe_size(int act_nr_sge, int is_llqp)
365 {
366 if (is_llqp)
367 return 128 << act_nr_sge;
368 else
369 return offsetof(struct ehca_wqe,
370 u.nud.sg_list[act_nr_sge]);
371 }
372
373 static void ehca_determine_small_queue(struct ehca_alloc_queue_parms *queue,
374 int req_nr_sge, int is_llqp)
375 {
376 u32 wqe_size, q_size;
377 int act_nr_sge = req_nr_sge;
378
379 if (!is_llqp)
380 /* round up #SGEs so WQE size is a power of 2 */
381 for (act_nr_sge = 4; act_nr_sge <= 252;
382 act_nr_sge = 4 + 2 * act_nr_sge)
383 if (act_nr_sge >= req_nr_sge)
384 break;
385
386 wqe_size = ehca_calc_wqe_size(act_nr_sge, is_llqp);
387 q_size = wqe_size * (queue->max_wr + 1);
388
389 if (q_size <= 512)
390 queue->page_size = 2;
391 else if (q_size <= 1024)
392 queue->page_size = 3;
393 else
394 queue->page_size = 0;
395
396 queue->is_small = (queue->page_size != 0);
397 }
398
399 /* needs to be called with cq->spinlock held */
400 void ehca_add_to_err_list(struct ehca_qp *qp, int on_sq)
401 {
402 struct list_head *list, *node;
403
404 /* TODO: support low latency QPs */
405 if (qp->ext_type == EQPT_LLQP)
406 return;
407
408 if (on_sq) {
409 list = &qp->send_cq->sqp_err_list;
410 node = &qp->sq_err_node;
411 } else {
412 list = &qp->recv_cq->rqp_err_list;
413 node = &qp->rq_err_node;
414 }
415
416 if (list_empty(node))
417 list_add_tail(node, list);
418
419 return;
420 }
421
422 static void del_from_err_list(struct ehca_cq *cq, struct list_head *node)
423 {
424 unsigned long flags;
425
426 spin_lock_irqsave(&cq->spinlock, flags);
427
428 if (!list_empty(node))
429 list_del_init(node);
430
431 spin_unlock_irqrestore(&cq->spinlock, flags);
432 }
433
434 static void reset_queue_map(struct ehca_queue_map *qmap)
435 {
436 int i;
437
438 qmap->tail = qmap->entries - 1;
439 qmap->left_to_poll = 0;
440 qmap->next_wqe_idx = 0;
441 for (i = 0; i < qmap->entries; i++) {
442 qmap->map[i].reported = 1;
443 qmap->map[i].cqe_req = 0;
444 }
445 }
446
447 /*
448 * Create an ib_qp struct that is either a QP or an SRQ, depending on
449 * the value of the is_srq parameter. If init_attr and srq_init_attr share
450 * fields, the field out of init_attr is used.
451 */
452 static struct ehca_qp *internal_create_qp(
453 struct ib_pd *pd,
454 struct ib_qp_init_attr *init_attr,
455 struct ib_srq_init_attr *srq_init_attr,
456 struct ib_udata *udata, int is_srq)
457 {
458 struct ehca_qp *my_qp, *my_srq = NULL;
459 struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
460 struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
461 ib_device);
462 struct ib_ucontext *context = NULL;
463 u64 h_ret;
464 int is_llqp = 0, has_srq = 0, is_user = 0;
465 int qp_type, max_send_sge, max_recv_sge, ret;
466
467 /* h_call's out parameters */
468 struct ehca_alloc_qp_parms parms;
469 u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
470 unsigned long flags;
471
472 if (!atomic_add_unless(&shca->num_qps, 1, shca->max_num_qps)) {
473 ehca_err(pd->device, "Unable to create QP, max number of %i "
474 "QPs reached.", shca->max_num_qps);
475 ehca_err(pd->device, "To increase the maximum number of QPs "
476 "use the number_of_qps module parameter.\n");
477 return ERR_PTR(-ENOSPC);
478 }
479
480 if (init_attr->create_flags) {
481 atomic_dec(&shca->num_qps);
482 return ERR_PTR(-EINVAL);
483 }
484
485 memset(&parms, 0, sizeof(parms));
486 qp_type = init_attr->qp_type;
487
488 if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
489 init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
490 ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
491 init_attr->sq_sig_type);
492 atomic_dec(&shca->num_qps);
493 return ERR_PTR(-EINVAL);
494 }
495
496 /* save LLQP info */
497 if (qp_type & 0x80) {
498 is_llqp = 1;
499 parms.ext_type = EQPT_LLQP;
500 parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
501 }
502 qp_type &= 0x1F;
503 init_attr->qp_type &= 0x1F;
504
505 /* handle SRQ base QPs */
506 if (init_attr->srq) {
507 my_srq = container_of(init_attr->srq, struct ehca_qp, ib_srq);
508
509 if (qp_type == IB_QPT_UC) {
510 ehca_err(pd->device, "UC with SRQ not supported");
511 atomic_dec(&shca->num_qps);
512 return ERR_PTR(-EINVAL);
513 }
514
515 has_srq = 1;
516 parms.ext_type = EQPT_SRQBASE;
517 parms.srq_qpn = my_srq->real_qp_num;
518 }
519
520 if (is_llqp && has_srq) {
521 ehca_err(pd->device, "LLQPs can't have an SRQ");
522 atomic_dec(&shca->num_qps);
523 return ERR_PTR(-EINVAL);
524 }
525
526 /* handle SRQs */
527 if (is_srq) {
528 parms.ext_type = EQPT_SRQ;
529 parms.srq_limit = srq_init_attr->attr.srq_limit;
530 if (init_attr->cap.max_recv_sge > 3) {
531 ehca_err(pd->device, "no more than three SGEs "
532 "supported for SRQ pd=%p max_sge=%x",
533 pd, init_attr->cap.max_recv_sge);
534 atomic_dec(&shca->num_qps);
535 return ERR_PTR(-EINVAL);
536 }
537 }
538
539 /* check QP type */
540 if (qp_type != IB_QPT_UD &&
541 qp_type != IB_QPT_UC &&
542 qp_type != IB_QPT_RC &&
543 qp_type != IB_QPT_SMI &&
544 qp_type != IB_QPT_GSI) {
545 ehca_err(pd->device, "wrong QP Type=%x", qp_type);
546 atomic_dec(&shca->num_qps);
547 return ERR_PTR(-EINVAL);
548 }
549
550 if (is_llqp) {
551 switch (qp_type) {
552 case IB_QPT_RC:
553 if ((init_attr->cap.max_send_wr > 255) ||
554 (init_attr->cap.max_recv_wr > 255)) {
555 ehca_err(pd->device,
556 "Invalid Number of max_sq_wr=%x "
557 "or max_rq_wr=%x for RC LLQP",
558 init_attr->cap.max_send_wr,
559 init_attr->cap.max_recv_wr);
560 atomic_dec(&shca->num_qps);
561 return ERR_PTR(-EINVAL);
562 }
563 break;
564 case IB_QPT_UD:
565 if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
566 ehca_err(pd->device, "UD LLQP not supported "
567 "by this adapter");
568 atomic_dec(&shca->num_qps);
569 return ERR_PTR(-ENOSYS);
570 }
571 if (!(init_attr->cap.max_send_sge <= 5
572 && init_attr->cap.max_send_sge >= 1
573 && init_attr->cap.max_recv_sge <= 5
574 && init_attr->cap.max_recv_sge >= 1)) {
575 ehca_err(pd->device,
576 "Invalid Number of max_send_sge=%x "
577 "or max_recv_sge=%x for UD LLQP",
578 init_attr->cap.max_send_sge,
579 init_attr->cap.max_recv_sge);
580 atomic_dec(&shca->num_qps);
581 return ERR_PTR(-EINVAL);
582 } else if (init_attr->cap.max_send_wr > 255) {
583 ehca_err(pd->device,
584 "Invalid Number of "
585 "max_send_wr=%x for UD QP_TYPE=%x",
586 init_attr->cap.max_send_wr, qp_type);
587 atomic_dec(&shca->num_qps);
588 return ERR_PTR(-EINVAL);
589 }
590 break;
591 default:
592 ehca_err(pd->device, "unsupported LL QP Type=%x",
593 qp_type);
594 atomic_dec(&shca->num_qps);
595 return ERR_PTR(-EINVAL);
596 }
597 } else {
598 int max_sge = (qp_type == IB_QPT_UD || qp_type == IB_QPT_SMI
599 || qp_type == IB_QPT_GSI) ? 250 : 252;
600
601 if (init_attr->cap.max_send_sge > max_sge
602 || init_attr->cap.max_recv_sge > max_sge) {
603 ehca_err(pd->device, "Invalid number of SGEs requested "
604 "send_sge=%x recv_sge=%x max_sge=%x",
605 init_attr->cap.max_send_sge,
606 init_attr->cap.max_recv_sge, max_sge);
607 atomic_dec(&shca->num_qps);
608 return ERR_PTR(-EINVAL);
609 }
610 }
611
612 my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
613 if (!my_qp) {
614 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
615 atomic_dec(&shca->num_qps);
616 return ERR_PTR(-ENOMEM);
617 }
618
619 if (pd->uobject && udata) {
620 is_user = 1;
621 context = pd->uobject->context;
622 }
623
624 atomic_set(&my_qp->nr_events, 0);
625 init_waitqueue_head(&my_qp->wait_completion);
626 spin_lock_init(&my_qp->spinlock_s);
627 spin_lock_init(&my_qp->spinlock_r);
628 my_qp->qp_type = qp_type;
629 my_qp->ext_type = parms.ext_type;
630 my_qp->state = IB_QPS_RESET;
631
632 if (init_attr->recv_cq)
633 my_qp->recv_cq =
634 container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
635 if (init_attr->send_cq)
636 my_qp->send_cq =
637 container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
638
639 do {
640 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
641 ret = -ENOMEM;
642 ehca_err(pd->device, "Can't reserve idr resources.");
643 goto create_qp_exit0;
644 }
645
646 write_lock_irqsave(&ehca_qp_idr_lock, flags);
647 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
648 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
649 } while (ret == -EAGAIN);
650
651 if (ret) {
652 ret = -ENOMEM;
653 ehca_err(pd->device, "Can't allocate new idr entry.");
654 goto create_qp_exit0;
655 }
656
657 if (my_qp->token > 0x1FFFFFF) {
658 ret = -EINVAL;
659 ehca_err(pd->device, "Invalid number of qp");
660 goto create_qp_exit1;
661 }
662
663 if (has_srq)
664 parms.srq_token = my_qp->token;
665
666 parms.servicetype = ibqptype2servicetype(qp_type);
667 if (parms.servicetype < 0) {
668 ret = -EINVAL;
669 ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
670 goto create_qp_exit1;
671 }
672
673 /* Always signal by WQE so we can hide circ. WQEs */
674 parms.sigtype = HCALL_SIGT_BY_WQE;
675
676 /* UD_AV CIRCUMVENTION */
677 max_send_sge = init_attr->cap.max_send_sge;
678 max_recv_sge = init_attr->cap.max_recv_sge;
679 if (parms.servicetype == ST_UD && !is_llqp) {
680 max_send_sge += 2;
681 max_recv_sge += 2;
682 }
683
684 parms.token = my_qp->token;
685 parms.eq_handle = shca->eq.ipz_eq_handle;
686 parms.pd = my_pd->fw_pd;
687 if (my_qp->send_cq)
688 parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
689 if (my_qp->recv_cq)
690 parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
691
692 parms.squeue.max_wr = init_attr->cap.max_send_wr;
693 parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
694 parms.squeue.max_sge = max_send_sge;
695 parms.rqueue.max_sge = max_recv_sge;
696
697 /* RC QPs need one more SWQE for unsolicited ack circumvention */
698 if (qp_type == IB_QPT_RC)
699 parms.squeue.max_wr++;
700
701 if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
702 if (HAS_SQ(my_qp))
703 ehca_determine_small_queue(
704 &parms.squeue, max_send_sge, is_llqp);
705 if (HAS_RQ(my_qp))
706 ehca_determine_small_queue(
707 &parms.rqueue, max_recv_sge, is_llqp);
708 parms.qp_storage =
709 (parms.squeue.is_small || parms.rqueue.is_small);
710 }
711
712 h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms, is_user);
713 if (h_ret != H_SUCCESS) {
714 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%lli",
715 h_ret);
716 ret = ehca2ib_return_code(h_ret);
717 goto create_qp_exit1;
718 }
719
720 ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
721 my_qp->ipz_qp_handle = parms.qp_handle;
722 my_qp->galpas = parms.galpas;
723
724 swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
725 rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
726
727 switch (qp_type) {
728 case IB_QPT_RC:
729 if (is_llqp) {
730 parms.squeue.act_nr_sges = 1;
731 parms.rqueue.act_nr_sges = 1;
732 }
733 /* hide the extra WQE */
734 parms.squeue.act_nr_wqes--;
735 break;
736 case IB_QPT_UD:
737 case IB_QPT_GSI:
738 case IB_QPT_SMI:
739 /* UD circumvention */
740 if (is_llqp) {
741 parms.squeue.act_nr_sges = 1;
742 parms.rqueue.act_nr_sges = 1;
743 } else {
744 parms.squeue.act_nr_sges -= 2;
745 parms.rqueue.act_nr_sges -= 2;
746 }
747
748 if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
749 parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
750 parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
751 parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
752 parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
753 ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
754 }
755
756 break;
757
758 default:
759 break;
760 }
761
762 /* initialize r/squeue and register queue pages */
763 if (HAS_SQ(my_qp)) {
764 ret = init_qp_queue(
765 shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
766 HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
767 &parms.squeue, swqe_size);
768 if (ret) {
769 ehca_err(pd->device, "Couldn't initialize squeue "
770 "and pages ret=%i", ret);
771 goto create_qp_exit2;
772 }
773
774 if (!is_user) {
775 my_qp->sq_map.entries = my_qp->ipz_squeue.queue_length /
776 my_qp->ipz_squeue.qe_size;
777 my_qp->sq_map.map = vmalloc(my_qp->sq_map.entries *
778 sizeof(struct ehca_qmap_entry));
779 if (!my_qp->sq_map.map) {
780 ehca_err(pd->device, "Couldn't allocate squeue "
781 "map ret=%i", ret);
782 goto create_qp_exit3;
783 }
784 INIT_LIST_HEAD(&my_qp->sq_err_node);
785 /* to avoid the generation of bogus flush CQEs */
786 reset_queue_map(&my_qp->sq_map);
787 }
788 }
789
790 if (HAS_RQ(my_qp)) {
791 ret = init_qp_queue(
792 shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
793 H_SUCCESS, &parms.rqueue, rwqe_size);
794 if (ret) {
795 ehca_err(pd->device, "Couldn't initialize rqueue "
796 "and pages ret=%i", ret);
797 goto create_qp_exit4;
798 }
799 if (!is_user) {
800 my_qp->rq_map.entries = my_qp->ipz_rqueue.queue_length /
801 my_qp->ipz_rqueue.qe_size;
802 my_qp->rq_map.map = vmalloc(my_qp->rq_map.entries *
803 sizeof(struct ehca_qmap_entry));
804 if (!my_qp->rq_map.map) {
805 ehca_err(pd->device, "Couldn't allocate squeue "
806 "map ret=%i", ret);
807 goto create_qp_exit5;
808 }
809 INIT_LIST_HEAD(&my_qp->rq_err_node);
810 /* to avoid the generation of bogus flush CQEs */
811 reset_queue_map(&my_qp->rq_map);
812 }
813 } else if (init_attr->srq && !is_user) {
814 /* this is a base QP, use the queue map of the SRQ */
815 my_qp->rq_map = my_srq->rq_map;
816 INIT_LIST_HEAD(&my_qp->rq_err_node);
817
818 my_qp->ipz_rqueue = my_srq->ipz_rqueue;
819 }
820
821 if (is_srq) {
822 my_qp->ib_srq.pd = &my_pd->ib_pd;
823 my_qp->ib_srq.device = my_pd->ib_pd.device;
824
825 my_qp->ib_srq.srq_context = init_attr->qp_context;
826 my_qp->ib_srq.event_handler = init_attr->event_handler;
827 } else {
828 my_qp->ib_qp.qp_num = ib_qp_num;
829 my_qp->ib_qp.pd = &my_pd->ib_pd;
830 my_qp->ib_qp.device = my_pd->ib_pd.device;
831
832 my_qp->ib_qp.recv_cq = init_attr->recv_cq;
833 my_qp->ib_qp.send_cq = init_attr->send_cq;
834
835 my_qp->ib_qp.qp_type = qp_type;
836 my_qp->ib_qp.srq = init_attr->srq;
837
838 my_qp->ib_qp.qp_context = init_attr->qp_context;
839 my_qp->ib_qp.event_handler = init_attr->event_handler;
840 }
841
842 init_attr->cap.max_inline_data = 0; /* not supported yet */
843 init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
844 init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
845 init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
846 init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
847 my_qp->init_attr = *init_attr;
848
849 if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
850 shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
851 &my_qp->ib_qp;
852 if (ehca_nr_ports < 0) {
853 /* alloc array to cache subsequent modify qp parms
854 * for autodetect mode
855 */
856 my_qp->mod_qp_parm =
857 kzalloc(EHCA_MOD_QP_PARM_MAX *
858 sizeof(*my_qp->mod_qp_parm),
859 GFP_KERNEL);
860 if (!my_qp->mod_qp_parm) {
861 ehca_err(pd->device,
862 "Could not alloc mod_qp_parm");
863 goto create_qp_exit5;
864 }
865 }
866 }
867
868 /* NOTE: define_apq0() not supported yet */
869 if (qp_type == IB_QPT_GSI) {
870 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
871 if (h_ret != H_SUCCESS) {
872 kfree(my_qp->mod_qp_parm);
873 my_qp->mod_qp_parm = NULL;
874 /* the QP pointer is no longer valid */
875 shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
876 NULL;
877 ret = ehca2ib_return_code(h_ret);
878 goto create_qp_exit6;
879 }
880 }
881
882 if (my_qp->send_cq) {
883 ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
884 if (ret) {
885 ehca_err(pd->device,
886 "Couldn't assign qp to send_cq ret=%i", ret);
887 goto create_qp_exit7;
888 }
889 }
890
891 /* copy queues, galpa data to user space */
892 if (context && udata) {
893 struct ehca_create_qp_resp resp;
894 memset(&resp, 0, sizeof(resp));
895
896 resp.qp_num = my_qp->real_qp_num;
897 resp.token = my_qp->token;
898 resp.qp_type = my_qp->qp_type;
899 resp.ext_type = my_qp->ext_type;
900 resp.qkey = my_qp->qkey;
901 resp.real_qp_num = my_qp->real_qp_num;
902
903 if (HAS_SQ(my_qp))
904 queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
905 if (HAS_RQ(my_qp))
906 queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
907 resp.fw_handle_ofs = (u32)
908 (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
909
910 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
911 ehca_err(pd->device, "Copy to udata failed");
912 ret = -EINVAL;
913 goto create_qp_exit8;
914 }
915 }
916
917 return my_qp;
918
919 create_qp_exit8:
920 ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
921
922 create_qp_exit7:
923 kfree(my_qp->mod_qp_parm);
924
925 create_qp_exit6:
926 if (HAS_RQ(my_qp) && !is_user)
927 vfree(my_qp->rq_map.map);
928
929 create_qp_exit5:
930 if (HAS_RQ(my_qp))
931 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
932
933 create_qp_exit4:
934 if (HAS_SQ(my_qp) && !is_user)
935 vfree(my_qp->sq_map.map);
936
937 create_qp_exit3:
938 if (HAS_SQ(my_qp))
939 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
940
941 create_qp_exit2:
942 hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
943
944 create_qp_exit1:
945 write_lock_irqsave(&ehca_qp_idr_lock, flags);
946 idr_remove(&ehca_qp_idr, my_qp->token);
947 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
948
949 create_qp_exit0:
950 kmem_cache_free(qp_cache, my_qp);
951 atomic_dec(&shca->num_qps);
952 return ERR_PTR(ret);
953 }
954
955 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
956 struct ib_qp_init_attr *qp_init_attr,
957 struct ib_udata *udata)
958 {
959 struct ehca_qp *ret;
960
961 ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
962 return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
963 }
964
965 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
966 struct ib_uobject *uobject);
967
968 struct ib_srq *ehca_create_srq(struct ib_pd *pd,
969 struct ib_srq_init_attr *srq_init_attr,
970 struct ib_udata *udata)
971 {
972 struct ib_qp_init_attr qp_init_attr;
973 struct ehca_qp *my_qp;
974 struct ib_srq *ret;
975 struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
976 ib_device);
977 struct hcp_modify_qp_control_block *mqpcb;
978 u64 hret, update_mask;
979
980 /* For common attributes, internal_create_qp() takes its info
981 * out of qp_init_attr, so copy all common attrs there.
982 */
983 memset(&qp_init_attr, 0, sizeof(qp_init_attr));
984 qp_init_attr.event_handler = srq_init_attr->event_handler;
985 qp_init_attr.qp_context = srq_init_attr->srq_context;
986 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
987 qp_init_attr.qp_type = IB_QPT_RC;
988 qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
989 qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
990
991 my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
992 if (IS_ERR(my_qp))
993 return (struct ib_srq *)my_qp;
994
995 /* copy back return values */
996 srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
997 srq_init_attr->attr.max_sge = 3;
998
999 /* drive SRQ into RTR state */
1000 mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1001 if (!mqpcb) {
1002 ehca_err(pd->device, "Could not get zeroed page for mqpcb "
1003 "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
1004 ret = ERR_PTR(-ENOMEM);
1005 goto create_srq1;
1006 }
1007
1008 mqpcb->qp_state = EHCA_QPS_INIT;
1009 mqpcb->prim_phys_port = 1;
1010 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1011 hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1012 my_qp->ipz_qp_handle,
1013 &my_qp->pf,
1014 update_mask,
1015 mqpcb, my_qp->galpas.kernel);
1016 if (hret != H_SUCCESS) {
1017 ehca_err(pd->device, "Could not modify SRQ to INIT "
1018 "ehca_qp=%p qp_num=%x h_ret=%lli",
1019 my_qp, my_qp->real_qp_num, hret);
1020 goto create_srq2;
1021 }
1022
1023 mqpcb->qp_enable = 1;
1024 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1025 hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1026 my_qp->ipz_qp_handle,
1027 &my_qp->pf,
1028 update_mask,
1029 mqpcb, my_qp->galpas.kernel);
1030 if (hret != H_SUCCESS) {
1031 ehca_err(pd->device, "Could not enable SRQ "
1032 "ehca_qp=%p qp_num=%x h_ret=%lli",
1033 my_qp, my_qp->real_qp_num, hret);
1034 goto create_srq2;
1035 }
1036
1037 mqpcb->qp_state = EHCA_QPS_RTR;
1038 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1039 hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1040 my_qp->ipz_qp_handle,
1041 &my_qp->pf,
1042 update_mask,
1043 mqpcb, my_qp->galpas.kernel);
1044 if (hret != H_SUCCESS) {
1045 ehca_err(pd->device, "Could not modify SRQ to RTR "
1046 "ehca_qp=%p qp_num=%x h_ret=%lli",
1047 my_qp, my_qp->real_qp_num, hret);
1048 goto create_srq2;
1049 }
1050
1051 ehca_free_fw_ctrlblock(mqpcb);
1052
1053 return &my_qp->ib_srq;
1054
1055 create_srq2:
1056 ret = ERR_PTR(ehca2ib_return_code(hret));
1057 ehca_free_fw_ctrlblock(mqpcb);
1058
1059 create_srq1:
1060 internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
1061
1062 return ret;
1063 }
1064
1065 /*
1066 * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
1067 * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
1068 * returns total number of bad wqes in bad_wqe_cnt
1069 */
1070 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
1071 int *bad_wqe_cnt)
1072 {
1073 u64 h_ret;
1074 struct ipz_queue *squeue;
1075 void *bad_send_wqe_p, *bad_send_wqe_v;
1076 u64 q_ofs;
1077 struct ehca_wqe *wqe;
1078 int qp_num = my_qp->ib_qp.qp_num;
1079
1080 /* get send wqe pointer */
1081 h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1082 my_qp->ipz_qp_handle, &my_qp->pf,
1083 &bad_send_wqe_p, NULL, 2);
1084 if (h_ret != H_SUCCESS) {
1085 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
1086 " ehca_qp=%p qp_num=%x h_ret=%lli",
1087 my_qp, qp_num, h_ret);
1088 return ehca2ib_return_code(h_ret);
1089 }
1090 bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
1091 ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
1092 qp_num, bad_send_wqe_p);
1093 /* convert wqe pointer to vadr */
1094 bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
1095 if (ehca_debug_level >= 2)
1096 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
1097 squeue = &my_qp->ipz_squeue;
1098 if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
1099 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
1100 " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
1101 return -EFAULT;
1102 }
1103
1104 /* loop sets wqe's purge bit */
1105 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1106 *bad_wqe_cnt = 0;
1107 while (wqe->optype != 0xff && wqe->wqef != 0xff) {
1108 if (ehca_debug_level >= 2)
1109 ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
1110 wqe->nr_of_data_seg = 0; /* suppress data access */
1111 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
1112 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
1113 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1114 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
1115 }
1116 /*
1117 * bad wqe will be reprocessed and ignored when pol_cq() is called,
1118 * i.e. nr of wqes with flush error status is one less
1119 */
1120 ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
1121 qp_num, (*bad_wqe_cnt)-1);
1122 wqe->wqef = 0;
1123
1124 return 0;
1125 }
1126
1127 static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
1128 struct ehca_queue_map *qmap)
1129 {
1130 void *wqe_v;
1131 u64 q_ofs;
1132 u32 wqe_idx;
1133 unsigned int tail_idx;
1134
1135 /* convert real to abs address */
1136 wqe_p = wqe_p & (~(1UL << 63));
1137
1138 wqe_v = abs_to_virt(wqe_p);
1139
1140 if (ipz_queue_abs_to_offset(ipz_queue, wqe_p, &q_ofs)) {
1141 ehca_gen_err("Invalid offset for calculating left cqes "
1142 "wqe_p=%#llx wqe_v=%p\n", wqe_p, wqe_v);
1143 return -EFAULT;
1144 }
1145
1146 tail_idx = next_index(qmap->tail, qmap->entries);
1147 wqe_idx = q_ofs / ipz_queue->qe_size;
1148
1149 /* check all processed wqes, whether a cqe is requested or not */
1150 while (tail_idx != wqe_idx) {
1151 if (qmap->map[tail_idx].cqe_req)
1152 qmap->left_to_poll++;
1153 tail_idx = next_index(tail_idx, qmap->entries);
1154 }
1155 /* save index in queue, where we have to start flushing */
1156 qmap->next_wqe_idx = wqe_idx;
1157 return 0;
1158 }
1159
1160 static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
1161 {
1162 u64 h_ret;
1163 void *send_wqe_p, *recv_wqe_p;
1164 int ret;
1165 unsigned long flags;
1166 int qp_num = my_qp->ib_qp.qp_num;
1167
1168 /* this hcall is not supported on base QPs */
1169 if (my_qp->ext_type != EQPT_SRQBASE) {
1170 /* get send and receive wqe pointer */
1171 h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1172 my_qp->ipz_qp_handle, &my_qp->pf,
1173 &send_wqe_p, &recv_wqe_p, 4);
1174 if (h_ret != H_SUCCESS) {
1175 ehca_err(&shca->ib_device, "disable_and_get_wqe() "
1176 "failed ehca_qp=%p qp_num=%x h_ret=%lli",
1177 my_qp, qp_num, h_ret);
1178 return ehca2ib_return_code(h_ret);
1179 }
1180
1181 /*
1182 * acquire lock to ensure that nobody is polling the cq which
1183 * could mean that the qmap->tail pointer is in an
1184 * inconsistent state.
1185 */
1186 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1187 ret = calc_left_cqes((u64)send_wqe_p, &my_qp->ipz_squeue,
1188 &my_qp->sq_map);
1189 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1190 if (ret)
1191 return ret;
1192
1193
1194 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1195 ret = calc_left_cqes((u64)recv_wqe_p, &my_qp->ipz_rqueue,
1196 &my_qp->rq_map);
1197 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1198 if (ret)
1199 return ret;
1200 } else {
1201 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1202 my_qp->sq_map.left_to_poll = 0;
1203 my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
1204 my_qp->sq_map.entries);
1205 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1206
1207 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1208 my_qp->rq_map.left_to_poll = 0;
1209 my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
1210 my_qp->rq_map.entries);
1211 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1212 }
1213
1214 /* this assures flush cqes being generated only for pending wqes */
1215 if ((my_qp->sq_map.left_to_poll == 0) &&
1216 (my_qp->rq_map.left_to_poll == 0)) {
1217 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1218 ehca_add_to_err_list(my_qp, 1);
1219 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1220
1221 if (HAS_RQ(my_qp)) {
1222 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1223 ehca_add_to_err_list(my_qp, 0);
1224 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock,
1225 flags);
1226 }
1227 }
1228
1229 return 0;
1230 }
1231
1232 /*
1233 * internal_modify_qp with circumvention to handle aqp0 properly
1234 * smi_reset2init indicates if this is an internal reset-to-init-call for
1235 * smi. This flag must always be zero if called from ehca_modify_qp()!
1236 * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
1237 */
1238 static int internal_modify_qp(struct ib_qp *ibqp,
1239 struct ib_qp_attr *attr,
1240 int attr_mask, int smi_reset2init)
1241 {
1242 enum ib_qp_state qp_cur_state, qp_new_state;
1243 int cnt, qp_attr_idx, ret = 0;
1244 enum ib_qp_statetrans statetrans;
1245 struct hcp_modify_qp_control_block *mqpcb;
1246 struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1247 struct ehca_shca *shca =
1248 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
1249 u64 update_mask;
1250 u64 h_ret;
1251 int bad_wqe_cnt = 0;
1252 int is_user = 0;
1253 int squeue_locked = 0;
1254 unsigned long flags = 0;
1255
1256 /* do query_qp to obtain current attr values */
1257 mqpcb = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
1258 if (!mqpcb) {
1259 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
1260 "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
1261 return -ENOMEM;
1262 }
1263
1264 h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
1265 my_qp->ipz_qp_handle,
1266 &my_qp->pf,
1267 mqpcb, my_qp->galpas.kernel);
1268 if (h_ret != H_SUCCESS) {
1269 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
1270 "ehca_qp=%p qp_num=%x h_ret=%lli",
1271 my_qp, ibqp->qp_num, h_ret);
1272 ret = ehca2ib_return_code(h_ret);
1273 goto modify_qp_exit1;
1274 }
1275 if (ibqp->uobject)
1276 is_user = 1;
1277
1278 qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
1279
1280 if (qp_cur_state == -EINVAL) { /* invalid qp state */
1281 ret = -EINVAL;
1282 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
1283 "ehca_qp=%p qp_num=%x",
1284 mqpcb->qp_state, my_qp, ibqp->qp_num);
1285 goto modify_qp_exit1;
1286 }
1287 /*
1288 * circumvention to set aqp0 initial state to init
1289 * as expected by IB spec
1290 */
1291 if (smi_reset2init == 0 &&
1292 ibqp->qp_type == IB_QPT_SMI &&
1293 qp_cur_state == IB_QPS_RESET &&
1294 (attr_mask & IB_QP_STATE) &&
1295 attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
1296 struct ib_qp_attr smiqp_attr = {
1297 .qp_state = IB_QPS_INIT,
1298 .port_num = my_qp->init_attr.port_num,
1299 .pkey_index = 0,
1300 .qkey = 0
1301 };
1302 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
1303 IB_QP_PKEY_INDEX | IB_QP_QKEY;
1304 int smirc = internal_modify_qp(
1305 ibqp, &smiqp_attr, smiqp_attr_mask, 1);
1306 if (smirc) {
1307 ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
1308 "ehca_modify_qp() rc=%i", smirc);
1309 ret = H_PARAMETER;
1310 goto modify_qp_exit1;
1311 }
1312 qp_cur_state = IB_QPS_INIT;
1313 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
1314 }
1315 /* is transmitted current state equal to "real" current state */
1316 if ((attr_mask & IB_QP_CUR_STATE) &&
1317 qp_cur_state != attr->cur_qp_state) {
1318 ret = -EINVAL;
1319 ehca_err(ibqp->device,
1320 "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
1321 " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
1322 attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
1323 goto modify_qp_exit1;
1324 }
1325
1326 ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
1327 "new qp_state=%x attribute_mask=%x",
1328 my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
1329
1330 qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
1331 if (!smi_reset2init &&
1332 !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
1333 attr_mask)) {
1334 ret = -EINVAL;
1335 ehca_err(ibqp->device,
1336 "Invalid qp transition new_state=%x cur_state=%x "
1337 "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
1338 qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
1339 goto modify_qp_exit1;
1340 }
1341
1342 mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
1343 if (mqpcb->qp_state)
1344 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1345 else {
1346 ret = -EINVAL;
1347 ehca_err(ibqp->device, "Invalid new qp state=%x "
1348 "ehca_qp=%p qp_num=%x",
1349 qp_new_state, my_qp, ibqp->qp_num);
1350 goto modify_qp_exit1;
1351 }
1352
1353 /* retrieve state transition struct to get req and opt attrs */
1354 statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
1355 if (statetrans < 0) {
1356 ret = -EINVAL;
1357 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
1358 "new_qp_state=%x State_xsition=%x ehca_qp=%p "
1359 "qp_num=%x", qp_cur_state, qp_new_state,
1360 statetrans, my_qp, ibqp->qp_num);
1361 goto modify_qp_exit1;
1362 }
1363
1364 qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
1365
1366 if (qp_attr_idx < 0) {
1367 ret = qp_attr_idx;
1368 ehca_err(ibqp->device,
1369 "Invalid QP type=%x ehca_qp=%p qp_num=%x",
1370 ibqp->qp_type, my_qp, ibqp->qp_num);
1371 goto modify_qp_exit1;
1372 }
1373
1374 ehca_dbg(ibqp->device,
1375 "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
1376 my_qp, ibqp->qp_num, statetrans);
1377
1378 /* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
1379 * in non-LL UD QPs.
1380 */
1381 if ((my_qp->qp_type == IB_QPT_UD) &&
1382 (my_qp->ext_type != EQPT_LLQP) &&
1383 (statetrans == IB_QPST_INIT2RTR) &&
1384 (shca->hw_level >= 0x22)) {
1385 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1386 mqpcb->send_grh_flag = 1;
1387 }
1388
1389 /* sqe -> rts: set purge bit of bad wqe before actual trans */
1390 if ((my_qp->qp_type == IB_QPT_UD ||
1391 my_qp->qp_type == IB_QPT_GSI ||
1392 my_qp->qp_type == IB_QPT_SMI) &&
1393 statetrans == IB_QPST_SQE2RTS) {
1394 /* mark next free wqe if kernel */
1395 if (!ibqp->uobject) {
1396 struct ehca_wqe *wqe;
1397 /* lock send queue */
1398 spin_lock_irqsave(&my_qp->spinlock_s, flags);
1399 squeue_locked = 1;
1400 /* mark next free wqe */
1401 wqe = (struct ehca_wqe *)
1402 ipz_qeit_get(&my_qp->ipz_squeue);
1403 wqe->optype = wqe->wqef = 0xff;
1404 ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
1405 ibqp->qp_num, wqe);
1406 }
1407 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
1408 if (ret) {
1409 ehca_err(ibqp->device, "prepare_sqe_rts() failed "
1410 "ehca_qp=%p qp_num=%x ret=%i",
1411 my_qp, ibqp->qp_num, ret);
1412 goto modify_qp_exit2;
1413 }
1414 }
1415
1416 /*
1417 * enable RDMA_Atomic_Control if reset->init und reliable con
1418 * this is necessary since gen2 does not provide that flag,
1419 * but pHyp requires it
1420 */
1421 if (statetrans == IB_QPST_RESET2INIT &&
1422 (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
1423 mqpcb->rdma_atomic_ctrl = 3;
1424 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
1425 }
1426 /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
1427 if (statetrans == IB_QPST_INIT2RTR &&
1428 (ibqp->qp_type == IB_QPT_UC) &&
1429 !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
1430 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
1431 update_mask |=
1432 EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1433 }
1434
1435 if (attr_mask & IB_QP_PKEY_INDEX) {
1436 if (attr->pkey_index >= 16) {
1437 ret = -EINVAL;
1438 ehca_err(ibqp->device, "Invalid pkey_index=%x. "
1439 "ehca_qp=%p qp_num=%x max_pkey_index=f",
1440 attr->pkey_index, my_qp, ibqp->qp_num);
1441 goto modify_qp_exit2;
1442 }
1443 mqpcb->prim_p_key_idx = attr->pkey_index;
1444 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
1445 }
1446 if (attr_mask & IB_QP_PORT) {
1447 struct ehca_sport *sport;
1448 struct ehca_qp *aqp1;
1449 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
1450 ret = -EINVAL;
1451 ehca_err(ibqp->device, "Invalid port=%x. "
1452 "ehca_qp=%p qp_num=%x num_ports=%x",
1453 attr->port_num, my_qp, ibqp->qp_num,
1454 shca->num_ports);
1455 goto modify_qp_exit2;
1456 }
1457 sport = &shca->sport[attr->port_num - 1];
1458 if (!sport->ibqp_sqp[IB_QPT_GSI]) {
1459 /* should not occur */
1460 ret = -EFAULT;
1461 ehca_err(ibqp->device, "AQP1 was not created for "
1462 "port=%x", attr->port_num);
1463 goto modify_qp_exit2;
1464 }
1465 aqp1 = container_of(sport->ibqp_sqp[IB_QPT_GSI],
1466 struct ehca_qp, ib_qp);
1467 if (ibqp->qp_type != IB_QPT_GSI &&
1468 ibqp->qp_type != IB_QPT_SMI &&
1469 aqp1->mod_qp_parm) {
1470 /*
1471 * firmware will reject this modify_qp() because
1472 * port is not activated/initialized fully
1473 */
1474 ret = -EFAULT;
1475 ehca_warn(ibqp->device, "Couldn't modify qp port=%x: "
1476 "either port is being activated (try again) "
1477 "or cabling issue", attr->port_num);
1478 goto modify_qp_exit2;
1479 }
1480 mqpcb->prim_phys_port = attr->port_num;
1481 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
1482 }
1483 if (attr_mask & IB_QP_QKEY) {
1484 mqpcb->qkey = attr->qkey;
1485 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
1486 }
1487 if (attr_mask & IB_QP_AV) {
1488 mqpcb->dlid = attr->ah_attr.dlid;
1489 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
1490 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
1491 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
1492 mqpcb->service_level = attr->ah_attr.sl;
1493 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
1494
1495 if (ehca_calc_ipd(shca, mqpcb->prim_phys_port,
1496 attr->ah_attr.static_rate,
1497 &mqpcb->max_static_rate)) {
1498 ret = -EINVAL;
1499 goto modify_qp_exit2;
1500 }
1501 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
1502
1503 /*
1504 * Always supply the GRH flag, even if it's zero, to give the
1505 * hypervisor a clear "yes" or "no" instead of a "perhaps"
1506 */
1507 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1508
1509 /*
1510 * only if GRH is TRUE we might consider SOURCE_GID_IDX
1511 * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1512 */
1513 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
1514 mqpcb->send_grh_flag = 1;
1515
1516 mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
1517 update_mask |=
1518 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
1519
1520 for (cnt = 0; cnt < 16; cnt++)
1521 mqpcb->dest_gid.byte[cnt] =
1522 attr->ah_attr.grh.dgid.raw[cnt];
1523
1524 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
1525 mqpcb->flow_label = attr->ah_attr.grh.flow_label;
1526 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
1527 mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
1528 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
1529 mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
1530 update_mask |=
1531 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
1532 }
1533 }
1534
1535 if (attr_mask & IB_QP_PATH_MTU) {
1536 /* store ld(MTU) */
1537 my_qp->mtu_shift = attr->path_mtu + 7;
1538 mqpcb->path_mtu = attr->path_mtu;
1539 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1540 }
1541 if (attr_mask & IB_QP_TIMEOUT) {
1542 mqpcb->timeout = attr->timeout;
1543 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1544 }
1545 if (attr_mask & IB_QP_RETRY_CNT) {
1546 mqpcb->retry_count = attr->retry_cnt;
1547 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1548 }
1549 if (attr_mask & IB_QP_RNR_RETRY) {
1550 mqpcb->rnr_retry_count = attr->rnr_retry;
1551 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1552 }
1553 if (attr_mask & IB_QP_RQ_PSN) {
1554 mqpcb->receive_psn = attr->rq_psn;
1555 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1556 }
1557 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1558 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1559 attr->max_dest_rd_atomic : 2;
1560 update_mask |=
1561 EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1562 }
1563 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1564 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1565 attr->max_rd_atomic : 2;
1566 update_mask |=
1567 EHCA_BMASK_SET
1568 (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1569 }
1570 if (attr_mask & IB_QP_ALT_PATH) {
1571 if (attr->alt_port_num < 1
1572 || attr->alt_port_num > shca->num_ports) {
1573 ret = -EINVAL;
1574 ehca_err(ibqp->device, "Invalid alt_port=%x. "
1575 "ehca_qp=%p qp_num=%x num_ports=%x",
1576 attr->alt_port_num, my_qp, ibqp->qp_num,
1577 shca->num_ports);
1578 goto modify_qp_exit2;
1579 }
1580 mqpcb->alt_phys_port = attr->alt_port_num;
1581
1582 if (attr->alt_pkey_index >= 16) {
1583 ret = -EINVAL;
1584 ehca_err(ibqp->device, "Invalid alt_pkey_index=%x. "
1585 "ehca_qp=%p qp_num=%x max_pkey_index=f",
1586 attr->pkey_index, my_qp, ibqp->qp_num);
1587 goto modify_qp_exit2;
1588 }
1589 mqpcb->alt_p_key_idx = attr->alt_pkey_index;
1590
1591 mqpcb->timeout_al = attr->alt_timeout;
1592 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1593 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1594 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1595
1596 if (ehca_calc_ipd(shca, mqpcb->alt_phys_port,
1597 attr->alt_ah_attr.static_rate,
1598 &mqpcb->max_static_rate_al)) {
1599 ret = -EINVAL;
1600 goto modify_qp_exit2;
1601 }
1602
1603 /* OpenIB doesn't support alternate retry counts - copy them */
1604 mqpcb->retry_count_al = mqpcb->retry_count;
1605 mqpcb->rnr_retry_count_al = mqpcb->rnr_retry_count;
1606
1607 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_ALT_PHYS_PORT, 1)
1608 | EHCA_BMASK_SET(MQPCB_MASK_ALT_P_KEY_IDX, 1)
1609 | EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT_AL, 1)
1610 | EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1)
1611 | EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1)
1612 | EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1)
1613 | EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1)
1614 | EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT_AL, 1)
1615 | EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT_AL, 1);
1616
1617 /*
1618 * Always supply the GRH flag, even if it's zero, to give the
1619 * hypervisor a clear "yes" or "no" instead of a "perhaps"
1620 */
1621 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1622
1623 /*
1624 * only if GRH is TRUE we might consider SOURCE_GID_IDX
1625 * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1626 */
1627 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1628 mqpcb->send_grh_flag_al = 1;
1629
1630 for (cnt = 0; cnt < 16; cnt++)
1631 mqpcb->dest_gid_al.byte[cnt] =
1632 attr->alt_ah_attr.grh.dgid.raw[cnt];
1633 mqpcb->source_gid_idx_al =
1634 attr->alt_ah_attr.grh.sgid_index;
1635 mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1636 mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1637 mqpcb->traffic_class_al =
1638 attr->alt_ah_attr.grh.traffic_class;
1639
1640 update_mask |=
1641 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1)
1642 | EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1)
1643 | EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1)
1644 | EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1) |
1645 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1646 }
1647 }
1648
1649 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1650 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1651 update_mask |=
1652 EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1653 }
1654
1655 if (attr_mask & IB_QP_SQ_PSN) {
1656 mqpcb->send_psn = attr->sq_psn;
1657 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1658 }
1659
1660 if (attr_mask & IB_QP_DEST_QPN) {
1661 mqpcb->dest_qp_nr = attr->dest_qp_num;
1662 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1663 }
1664
1665 if (attr_mask & IB_QP_PATH_MIG_STATE) {
1666 if (attr->path_mig_state != IB_MIG_REARM
1667 && attr->path_mig_state != IB_MIG_MIGRATED) {
1668 ret = -EINVAL;
1669 ehca_err(ibqp->device, "Invalid mig_state=%x",
1670 attr->path_mig_state);
1671 goto modify_qp_exit2;
1672 }
1673 mqpcb->path_migration_state = attr->path_mig_state + 1;
1674 if (attr->path_mig_state == IB_MIG_REARM)
1675 my_qp->mig_armed = 1;
1676 update_mask |=
1677 EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1678 }
1679
1680 if (attr_mask & IB_QP_CAP) {
1681 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1682 update_mask |=
1683 EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1684 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1685 update_mask |=
1686 EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1687 /* no support for max_send/recv_sge yet */
1688 }
1689
1690 if (ehca_debug_level >= 2)
1691 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1692
1693 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1694 my_qp->ipz_qp_handle,
1695 &my_qp->pf,
1696 update_mask,
1697 mqpcb, my_qp->galpas.kernel);
1698
1699 if (h_ret != H_SUCCESS) {
1700 ret = ehca2ib_return_code(h_ret);
1701 ehca_err(ibqp->device, "hipz_h_modify_qp() failed h_ret=%lli "
1702 "ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
1703 goto modify_qp_exit2;
1704 }
1705
1706 if ((my_qp->qp_type == IB_QPT_UD ||
1707 my_qp->qp_type == IB_QPT_GSI ||
1708 my_qp->qp_type == IB_QPT_SMI) &&
1709 statetrans == IB_QPST_SQE2RTS) {
1710 /* doorbell to reprocessing wqes */
1711 iosync(); /* serialize GAL register access */
1712 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1713 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1714 }
1715
1716 if (statetrans == IB_QPST_RESET2INIT ||
1717 statetrans == IB_QPST_INIT2INIT) {
1718 mqpcb->qp_enable = 1;
1719 mqpcb->qp_state = EHCA_QPS_INIT;
1720 update_mask = 0;
1721 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1722
1723 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1724 my_qp->ipz_qp_handle,
1725 &my_qp->pf,
1726 update_mask,
1727 mqpcb,
1728 my_qp->galpas.kernel);
1729
1730 if (h_ret != H_SUCCESS) {
1731 ret = ehca2ib_return_code(h_ret);
1732 ehca_err(ibqp->device, "ENABLE in context of "
1733 "RESET_2_INIT failed! Maybe you didn't get "
1734 "a LID h_ret=%lli ehca_qp=%p qp_num=%x",
1735 h_ret, my_qp, ibqp->qp_num);
1736 goto modify_qp_exit2;
1737 }
1738 }
1739 if ((qp_new_state == IB_QPS_ERR) && (qp_cur_state != IB_QPS_ERR)
1740 && !is_user) {
1741 ret = check_for_left_cqes(my_qp, shca);
1742 if (ret)
1743 goto modify_qp_exit2;
1744 }
1745
1746 if (statetrans == IB_QPST_ANY2RESET) {
1747 ipz_qeit_reset(&my_qp->ipz_rqueue);
1748 ipz_qeit_reset(&my_qp->ipz_squeue);
1749
1750 if (qp_cur_state == IB_QPS_ERR && !is_user) {
1751 del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
1752
1753 if (HAS_RQ(my_qp))
1754 del_from_err_list(my_qp->recv_cq,
1755 &my_qp->rq_err_node);
1756 }
1757 if (!is_user)
1758 reset_queue_map(&my_qp->sq_map);
1759
1760 if (HAS_RQ(my_qp) && !is_user)
1761 reset_queue_map(&my_qp->rq_map);
1762 }
1763
1764 if (attr_mask & IB_QP_QKEY)
1765 my_qp->qkey = attr->qkey;
1766
1767 modify_qp_exit2:
1768 if (squeue_locked) { /* this means: sqe -> rts */
1769 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
1770 my_qp->sqerr_purgeflag = 1;
1771 }
1772
1773 modify_qp_exit1:
1774 ehca_free_fw_ctrlblock(mqpcb);
1775
1776 return ret;
1777 }
1778
1779 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1780 struct ib_udata *udata)
1781 {
1782 int ret = 0;
1783
1784 struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
1785 ib_device);
1786 struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1787
1788 /* The if-block below caches qp_attr to be modified for GSI and SMI
1789 * qps during the initialization by ib_mad. When the respective port
1790 * is activated, ie we got an event PORT_ACTIVE, we'll replay the
1791 * cached modify calls sequence, see ehca_recover_sqs() below.
1792 * Why that is required:
1793 * 1) If one port is connected, older code requires that port one
1794 * to be connected and module option nr_ports=1 to be given by
1795 * user, which is very inconvenient for end user.
1796 * 2) Firmware accepts modify_qp() only if respective port has become
1797 * active. Older code had a wait loop of 30sec create_qp()/
1798 * define_aqp1(), which is not appropriate in practice. This
1799 * code now removes that wait loop, see define_aqp1(), and always
1800 * reports all ports to ib_mad resp. users. Only activated ports
1801 * will then usable for the users.
1802 */
1803 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1804 int port = my_qp->init_attr.port_num;
1805 struct ehca_sport *sport = &shca->sport[port - 1];
1806 unsigned long flags;
1807 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
1808 /* cache qp_attr only during init */
1809 if (my_qp->mod_qp_parm) {
1810 struct ehca_mod_qp_parm *p;
1811 if (my_qp->mod_qp_parm_idx >= EHCA_MOD_QP_PARM_MAX) {
1812 ehca_err(&shca->ib_device,
1813 "mod_qp_parm overflow state=%x port=%x"
1814 " type=%x", attr->qp_state,
1815 my_qp->init_attr.port_num,
1816 ibqp->qp_type);
1817 spin_unlock_irqrestore(&sport->mod_sqp_lock,
1818 flags);
1819 return -EINVAL;
1820 }
1821 p = &my_qp->mod_qp_parm[my_qp->mod_qp_parm_idx];
1822 p->mask = attr_mask;
1823 p->attr = *attr;
1824 my_qp->mod_qp_parm_idx++;
1825 ehca_dbg(&shca->ib_device,
1826 "Saved qp_attr for state=%x port=%x type=%x",
1827 attr->qp_state, my_qp->init_attr.port_num,
1828 ibqp->qp_type);
1829 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1830 goto out;
1831 }
1832 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1833 }
1834
1835 ret = internal_modify_qp(ibqp, attr, attr_mask, 0);
1836
1837 out:
1838 if ((ret == 0) && (attr_mask & IB_QP_STATE))
1839 my_qp->state = attr->qp_state;
1840
1841 return ret;
1842 }
1843
1844 void ehca_recover_sqp(struct ib_qp *sqp)
1845 {
1846 struct ehca_qp *my_sqp = container_of(sqp, struct ehca_qp, ib_qp);
1847 int port = my_sqp->init_attr.port_num;
1848 struct ib_qp_attr attr;
1849 struct ehca_mod_qp_parm *qp_parm;
1850 int i, qp_parm_idx, ret;
1851 unsigned long flags, wr_cnt;
1852
1853 if (!my_sqp->mod_qp_parm)
1854 return;
1855 ehca_dbg(sqp->device, "SQP port=%x qp_num=%x", port, sqp->qp_num);
1856
1857 qp_parm = my_sqp->mod_qp_parm;
1858 qp_parm_idx = my_sqp->mod_qp_parm_idx;
1859 for (i = 0; i < qp_parm_idx; i++) {
1860 attr = qp_parm[i].attr;
1861 ret = internal_modify_qp(sqp, &attr, qp_parm[i].mask, 0);
1862 if (ret) {
1863 ehca_err(sqp->device, "Could not modify SQP port=%x "
1864 "qp_num=%x ret=%x", port, sqp->qp_num, ret);
1865 goto free_qp_parm;
1866 }
1867 ehca_dbg(sqp->device, "SQP port=%x qp_num=%x in state=%x",
1868 port, sqp->qp_num, attr.qp_state);
1869 }
1870
1871 /* re-trigger posted recv wrs */
1872 wr_cnt = my_sqp->ipz_rqueue.current_q_offset /
1873 my_sqp->ipz_rqueue.qe_size;
1874 if (wr_cnt) {
1875 spin_lock_irqsave(&my_sqp->spinlock_r, flags);
1876 hipz_update_rqa(my_sqp, wr_cnt);
1877 spin_unlock_irqrestore(&my_sqp->spinlock_r, flags);
1878 ehca_dbg(sqp->device, "doorbell port=%x qp_num=%x wr_cnt=%lx",
1879 port, sqp->qp_num, wr_cnt);
1880 }
1881
1882 free_qp_parm:
1883 kfree(qp_parm);
1884 /* this prevents subsequent calls to modify_qp() to cache qp_attr */
1885 my_sqp->mod_qp_parm = NULL;
1886 }
1887
1888 int ehca_query_qp(struct ib_qp *qp,
1889 struct ib_qp_attr *qp_attr,
1890 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1891 {
1892 struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1893 struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1894 ib_device);
1895 struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1896 struct hcp_modify_qp_control_block *qpcb;
1897 int cnt, ret = 0;
1898 u64 h_ret;
1899
1900 if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1901 ehca_err(qp->device, "Invalid attribute mask "
1902 "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1903 my_qp, qp->qp_num, qp_attr_mask);
1904 return -EINVAL;
1905 }
1906
1907 qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1908 if (!qpcb) {
1909 ehca_err(qp->device, "Out of memory for qpcb "
1910 "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1911 return -ENOMEM;
1912 }
1913
1914 h_ret = hipz_h_query_qp(adapter_handle,
1915 my_qp->ipz_qp_handle,
1916 &my_qp->pf,
1917 qpcb, my_qp->galpas.kernel);
1918
1919 if (h_ret != H_SUCCESS) {
1920 ret = ehca2ib_return_code(h_ret);
1921 ehca_err(qp->device, "hipz_h_query_qp() failed "
1922 "ehca_qp=%p qp_num=%x h_ret=%lli",
1923 my_qp, qp->qp_num, h_ret);
1924 goto query_qp_exit1;
1925 }
1926
1927 qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1928 qp_attr->qp_state = qp_attr->cur_qp_state;
1929
1930 if (qp_attr->cur_qp_state == -EINVAL) {
1931 ret = -EINVAL;
1932 ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
1933 "ehca_qp=%p qp_num=%x",
1934 qpcb->qp_state, my_qp, qp->qp_num);
1935 goto query_qp_exit1;
1936 }
1937
1938 if (qp_attr->qp_state == IB_QPS_SQD)
1939 qp_attr->sq_draining = 1;
1940
1941 qp_attr->qkey = qpcb->qkey;
1942 qp_attr->path_mtu = qpcb->path_mtu;
1943 qp_attr->path_mig_state = qpcb->path_migration_state - 1;
1944 qp_attr->rq_psn = qpcb->receive_psn;
1945 qp_attr->sq_psn = qpcb->send_psn;
1946 qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1947 qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1948 qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1949 /* UD_AV CIRCUMVENTION */
1950 if (my_qp->qp_type == IB_QPT_UD) {
1951 qp_attr->cap.max_send_sge =
1952 qpcb->actual_nr_sges_in_sq_wqe - 2;
1953 qp_attr->cap.max_recv_sge =
1954 qpcb->actual_nr_sges_in_rq_wqe - 2;
1955 } else {
1956 qp_attr->cap.max_send_sge =
1957 qpcb->actual_nr_sges_in_sq_wqe;
1958 qp_attr->cap.max_recv_sge =
1959 qpcb->actual_nr_sges_in_rq_wqe;
1960 }
1961
1962 qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1963 qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1964
1965 qp_attr->pkey_index = qpcb->prim_p_key_idx;
1966 qp_attr->port_num = qpcb->prim_phys_port;
1967 qp_attr->timeout = qpcb->timeout;
1968 qp_attr->retry_cnt = qpcb->retry_count;
1969 qp_attr->rnr_retry = qpcb->rnr_retry_count;
1970
1971 qp_attr->alt_pkey_index = qpcb->alt_p_key_idx;
1972 qp_attr->alt_port_num = qpcb->alt_phys_port;
1973 qp_attr->alt_timeout = qpcb->timeout_al;
1974
1975 qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
1976 qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
1977
1978 /* primary av */
1979 qp_attr->ah_attr.sl = qpcb->service_level;
1980
1981 if (qpcb->send_grh_flag) {
1982 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1983 }
1984
1985 qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1986 qp_attr->ah_attr.dlid = qpcb->dlid;
1987 qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1988 qp_attr->ah_attr.port_num = qp_attr->port_num;
1989
1990 /* primary GRH */
1991 qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1992 qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1993 qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1994 qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1995
1996 for (cnt = 0; cnt < 16; cnt++)
1997 qp_attr->ah_attr.grh.dgid.raw[cnt] =
1998 qpcb->dest_gid.byte[cnt];
1999
2000 /* alternate AV */
2001 qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
2002 if (qpcb->send_grh_flag_al) {
2003 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
2004 }
2005
2006 qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
2007 qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
2008 qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
2009
2010 /* alternate GRH */
2011 qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
2012 qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
2013 qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
2014 qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
2015
2016 for (cnt = 0; cnt < 16; cnt++)
2017 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
2018 qpcb->dest_gid_al.byte[cnt];
2019
2020 /* return init attributes given in ehca_create_qp */
2021 if (qp_init_attr)
2022 *qp_init_attr = my_qp->init_attr;
2023
2024 if (ehca_debug_level >= 2)
2025 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
2026
2027 query_qp_exit1:
2028 ehca_free_fw_ctrlblock(qpcb);
2029
2030 return ret;
2031 }
2032
2033 int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
2034 enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
2035 {
2036 struct ehca_qp *my_qp =
2037 container_of(ibsrq, struct ehca_qp, ib_srq);
2038 struct ehca_shca *shca =
2039 container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
2040 struct hcp_modify_qp_control_block *mqpcb;
2041 u64 update_mask;
2042 u64 h_ret;
2043 int ret = 0;
2044
2045 mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2046 if (!mqpcb) {
2047 ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
2048 "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
2049 return -ENOMEM;
2050 }
2051
2052 update_mask = 0;
2053 if (attr_mask & IB_SRQ_LIMIT) {
2054 attr_mask &= ~IB_SRQ_LIMIT;
2055 update_mask |=
2056 EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
2057 | EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
2058 mqpcb->curr_srq_limit = attr->srq_limit;
2059 mqpcb->qp_aff_asyn_ev_log_reg =
2060 EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
2061 }
2062
2063 /* by now, all bits in attr_mask should have been cleared */
2064 if (attr_mask) {
2065 ehca_err(ibsrq->device, "invalid attribute mask bits set "
2066 "attr_mask=%x", attr_mask);
2067 ret = -EINVAL;
2068 goto modify_srq_exit0;
2069 }
2070
2071 if (ehca_debug_level >= 2)
2072 ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2073
2074 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
2075 NULL, update_mask, mqpcb,
2076 my_qp->galpas.kernel);
2077
2078 if (h_ret != H_SUCCESS) {
2079 ret = ehca2ib_return_code(h_ret);
2080 ehca_err(ibsrq->device, "hipz_h_modify_qp() failed h_ret=%lli "
2081 "ehca_qp=%p qp_num=%x",
2082 h_ret, my_qp, my_qp->real_qp_num);
2083 }
2084
2085 modify_srq_exit0:
2086 ehca_free_fw_ctrlblock(mqpcb);
2087
2088 return ret;
2089 }
2090
2091 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
2092 {
2093 struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
2094 struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
2095 ib_device);
2096 struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
2097 struct hcp_modify_qp_control_block *qpcb;
2098 int ret = 0;
2099 u64 h_ret;
2100
2101 qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2102 if (!qpcb) {
2103 ehca_err(srq->device, "Out of memory for qpcb "
2104 "ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
2105 return -ENOMEM;
2106 }
2107
2108 h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
2109 NULL, qpcb, my_qp->galpas.kernel);
2110
2111 if (h_ret != H_SUCCESS) {
2112 ret = ehca2ib_return_code(h_ret);
2113 ehca_err(srq->device, "hipz_h_query_qp() failed "
2114 "ehca_qp=%p qp_num=%x h_ret=%lli",
2115 my_qp, my_qp->real_qp_num, h_ret);
2116 goto query_srq_exit1;
2117 }
2118
2119 srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
2120 srq_attr->max_sge = 3;
2121 srq_attr->srq_limit = qpcb->curr_srq_limit;
2122
2123 if (ehca_debug_level >= 2)
2124 ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2125
2126 query_srq_exit1:
2127 ehca_free_fw_ctrlblock(qpcb);
2128
2129 return ret;
2130 }
2131
2132 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
2133 struct ib_uobject *uobject)
2134 {
2135 struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
2136 struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
2137 ib_pd);
2138 struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
2139 u32 qp_num = my_qp->real_qp_num;
2140 int ret;
2141 u64 h_ret;
2142 u8 port_num;
2143 int is_user = 0;
2144 enum ib_qp_type qp_type;
2145 unsigned long flags;
2146
2147 if (uobject) {
2148 is_user = 1;
2149 if (my_qp->mm_count_galpa ||
2150 my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
2151 ehca_err(dev, "Resources still referenced in "
2152 "user space qp_num=%x", qp_num);
2153 return -EINVAL;
2154 }
2155 }
2156
2157 if (my_qp->send_cq) {
2158 ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
2159 if (ret) {
2160 ehca_err(dev, "Couldn't unassign qp from "
2161 "send_cq ret=%i qp_num=%x cq_num=%x", ret,
2162 qp_num, my_qp->send_cq->cq_number);
2163 return ret;
2164 }
2165 }
2166
2167 write_lock_irqsave(&ehca_qp_idr_lock, flags);
2168 idr_remove(&ehca_qp_idr, my_qp->token);
2169 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
2170
2171 /*
2172 * SRQs will never get into an error list and do not have a recv_cq,
2173 * so we need to skip them here.
2174 */
2175 if (HAS_RQ(my_qp) && !IS_SRQ(my_qp) && !is_user)
2176 del_from_err_list(my_qp->recv_cq, &my_qp->rq_err_node);
2177
2178 if (HAS_SQ(my_qp) && !is_user)
2179 del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
2180
2181 /* now wait until all pending events have completed */
2182 wait_event(my_qp->wait_completion, !atomic_read(&my_qp->nr_events));
2183
2184 h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
2185 if (h_ret != H_SUCCESS) {
2186 ehca_err(dev, "hipz_h_destroy_qp() failed h_ret=%lli "
2187 "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
2188 return ehca2ib_return_code(h_ret);
2189 }
2190
2191 port_num = my_qp->init_attr.port_num;
2192 qp_type = my_qp->init_attr.qp_type;
2193
2194 if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
2195 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
2196 kfree(my_qp->mod_qp_parm);
2197 my_qp->mod_qp_parm = NULL;
2198 shca->sport[port_num - 1].ibqp_sqp[qp_type] = NULL;
2199 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
2200 }
2201
2202 /* no support for IB_QPT_SMI yet */
2203 if (qp_type == IB_QPT_GSI) {
2204 struct ib_event event;
2205 ehca_info(dev, "device %s: port %x is inactive.",
2206 shca->ib_device.name, port_num);
2207 event.device = &shca->ib_device;
2208 event.event = IB_EVENT_PORT_ERR;
2209 event.element.port_num = port_num;
2210 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
2211 ib_dispatch_event(&event);
2212 }
2213
2214 if (HAS_RQ(my_qp)) {
2215 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
2216 if (!is_user)
2217 vfree(my_qp->rq_map.map);
2218 }
2219 if (HAS_SQ(my_qp)) {
2220 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
2221 if (!is_user)
2222 vfree(my_qp->sq_map.map);
2223 }
2224 kmem_cache_free(qp_cache, my_qp);
2225 atomic_dec(&shca->num_qps);
2226 return 0;
2227 }
2228
2229 int ehca_destroy_qp(struct ib_qp *qp)
2230 {
2231 return internal_destroy_qp(qp->device,
2232 container_of(qp, struct ehca_qp, ib_qp),
2233 qp->uobject);
2234 }
2235
2236 int ehca_destroy_srq(struct ib_srq *srq)
2237 {
2238 return internal_destroy_qp(srq->device,
2239 container_of(srq, struct ehca_qp, ib_srq),
2240 srq->uobject);
2241 }
2242
2243 int ehca_init_qp_cache(void)
2244 {
2245 qp_cache = kmem_cache_create("ehca_cache_qp",
2246 sizeof(struct ehca_qp), 0,
2247 SLAB_HWCACHE_ALIGN,
2248 NULL);
2249 if (!qp_cache)
2250 return -ENOMEM;
2251 return 0;
2252 }
2253
2254 void ehca_cleanup_qp_cache(void)
2255 {
2256 if (qp_cache)
2257 kmem_cache_destroy(qp_cache);
2258 }