include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6.git] / drivers / infiniband / hw / ehca / ehca_qp.c
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_ETY:
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 }