Merge branches 'boards' and 'fixes' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6] / drivers / net / ehea / ehea_qmr.c
1 /*
2  *  linux/drivers/net/ehea/ehea_qmr.c
3  *
4  *  eHEA ethernet device driver for IBM eServer System p
5  *
6  *  (C) Copyright IBM Corp. 2006
7  *
8  *  Authors:
9  *       Christoph Raisch <raisch@de.ibm.com>
10  *       Jan-Bernd Themann <themann@de.ibm.com>
11  *       Thomas Klein <tklein@de.ibm.com>
12  *
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2, or (at your option)
17  * any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27  */
28
29 #include <linux/mm.h>
30 #include "ehea.h"
31 #include "ehea_phyp.h"
32 #include "ehea_qmr.h"
33
34 struct ehea_bmap *ehea_bmap = NULL;
35
36
37
38 static void *hw_qpageit_get_inc(struct hw_queue *queue)
39 {
40         void *retvalue = hw_qeit_get(queue);
41
42         queue->current_q_offset += queue->pagesize;
43         if (queue->current_q_offset > queue->queue_length) {
44                 queue->current_q_offset -= queue->pagesize;
45                 retvalue = NULL;
46         } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
47                 ehea_error("not on pageboundary");
48                 retvalue = NULL;
49         }
50         return retvalue;
51 }
52
53 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
54                           const u32 pagesize, const u32 qe_size)
55 {
56         int pages_per_kpage = PAGE_SIZE / pagesize;
57         int i, k;
58
59         if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
60                 ehea_error("pagesize conflict! kernel pagesize=%d, "
61                            "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
62                 return -EINVAL;
63         }
64
65         queue->queue_length = nr_of_pages * pagesize;
66         queue->queue_pages = kmalloc(nr_of_pages * sizeof(void *), GFP_KERNEL);
67         if (!queue->queue_pages) {
68                 ehea_error("no mem for queue_pages");
69                 return -ENOMEM;
70         }
71
72         /*
73          * allocate pages for queue:
74          * outer loop allocates whole kernel pages (page aligned) and
75          * inner loop divides a kernel page into smaller hea queue pages
76          */
77         i = 0;
78         while (i < nr_of_pages) {
79                 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
80                 if (!kpage)
81                         goto out_nomem;
82                 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
83                         (queue->queue_pages)[i] = (struct ehea_page *)kpage;
84                         kpage += pagesize;
85                         i++;
86                 }
87         }
88
89         queue->current_q_offset = 0;
90         queue->qe_size = qe_size;
91         queue->pagesize = pagesize;
92         queue->toggle_state = 1;
93
94         return 0;
95 out_nomem:
96         for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
97                 if (!(queue->queue_pages)[i])
98                         break;
99                 free_page((unsigned long)(queue->queue_pages)[i]);
100         }
101         return -ENOMEM;
102 }
103
104 static void hw_queue_dtor(struct hw_queue *queue)
105 {
106         int pages_per_kpage = PAGE_SIZE / queue->pagesize;
107         int i, nr_pages;
108
109         if (!queue || !queue->queue_pages)
110                 return;
111
112         nr_pages = queue->queue_length / queue->pagesize;
113
114         for (i = 0; i < nr_pages; i += pages_per_kpage)
115                 free_page((unsigned long)(queue->queue_pages)[i]);
116
117         kfree(queue->queue_pages);
118 }
119
120 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
121                                int nr_of_cqe, u64 eq_handle, u32 cq_token)
122 {
123         struct ehea_cq *cq;
124         struct h_epa epa;
125         u64 *cq_handle_ref, hret, rpage;
126         u32 act_nr_of_entries, act_pages, counter;
127         int ret;
128         void *vpage;
129
130         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
131         if (!cq) {
132                 ehea_error("no mem for cq");
133                 goto out_nomem;
134         }
135
136         cq->attr.max_nr_of_cqes = nr_of_cqe;
137         cq->attr.cq_token = cq_token;
138         cq->attr.eq_handle = eq_handle;
139
140         cq->adapter = adapter;
141
142         cq_handle_ref = &cq->fw_handle;
143         act_nr_of_entries = 0;
144         act_pages = 0;
145
146         hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
147                                         &cq->fw_handle, &cq->epas);
148         if (hret != H_SUCCESS) {
149                 ehea_error("alloc_resource_cq failed");
150                 goto out_freemem;
151         }
152
153         ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
154                             EHEA_PAGESIZE, sizeof(struct ehea_cqe));
155         if (ret)
156                 goto out_freeres;
157
158         for (counter = 0; counter < cq->attr.nr_pages; counter++) {
159                 vpage = hw_qpageit_get_inc(&cq->hw_queue);
160                 if (!vpage) {
161                         ehea_error("hw_qpageit_get_inc failed");
162                         goto out_kill_hwq;
163                 }
164
165                 rpage = virt_to_abs(vpage);
166                 hret = ehea_h_register_rpage(adapter->handle,
167                                              0, EHEA_CQ_REGISTER_ORIG,
168                                              cq->fw_handle, rpage, 1);
169                 if (hret < H_SUCCESS) {
170                         ehea_error("register_rpage_cq failed ehea_cq=%p "
171                                    "hret=%lx counter=%i act_pages=%i",
172                                    cq, hret, counter, cq->attr.nr_pages);
173                         goto out_kill_hwq;
174                 }
175
176                 if (counter == (cq->attr.nr_pages - 1)) {
177                         vpage = hw_qpageit_get_inc(&cq->hw_queue);
178
179                         if ((hret != H_SUCCESS) || (vpage)) {
180                                 ehea_error("registration of pages not "
181                                            "complete hret=%lx\n", hret);
182                                 goto out_kill_hwq;
183                         }
184                 } else {
185                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
186                                 ehea_error("CQ: registration of page failed "
187                                            "hret=%lx\n", hret);
188                                 goto out_kill_hwq;
189                         }
190                 }
191         }
192
193         hw_qeit_reset(&cq->hw_queue);
194         epa = cq->epas.kernel;
195         ehea_reset_cq_ep(cq);
196         ehea_reset_cq_n1(cq);
197
198         return cq;
199
200 out_kill_hwq:
201         hw_queue_dtor(&cq->hw_queue);
202
203 out_freeres:
204         ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
205
206 out_freemem:
207         kfree(cq);
208
209 out_nomem:
210         return NULL;
211 }
212
213 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
214 {
215         u64 hret;
216         u64 adapter_handle = cq->adapter->handle;
217
218         /* deregister all previous registered pages */
219         hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
220         if (hret != H_SUCCESS)
221                 return hret;
222
223         hw_queue_dtor(&cq->hw_queue);
224         kfree(cq);
225
226         return hret;
227 }
228
229 int ehea_destroy_cq(struct ehea_cq *cq)
230 {
231         u64 hret;
232         if (!cq)
233                 return 0;
234
235         hcp_epas_dtor(&cq->epas);
236         hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
237         if (hret == H_R_STATE) {
238                 ehea_error_data(cq->adapter, cq->fw_handle);
239                 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
240         }
241
242         if (hret != H_SUCCESS) {
243                 ehea_error("destroy CQ failed");
244                 return -EIO;
245         }
246
247         return 0;
248 }
249
250 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
251                                const enum ehea_eq_type type,
252                                const u32 max_nr_of_eqes, const u8 eqe_gen)
253 {
254         int ret, i;
255         u64 hret, rpage;
256         void *vpage;
257         struct ehea_eq *eq;
258
259         eq = kzalloc(sizeof(*eq), GFP_KERNEL);
260         if (!eq) {
261                 ehea_error("no mem for eq");
262                 return NULL;
263         }
264
265         eq->adapter = adapter;
266         eq->attr.type = type;
267         eq->attr.max_nr_of_eqes = max_nr_of_eqes;
268         eq->attr.eqe_gen = eqe_gen;
269         spin_lock_init(&eq->spinlock);
270
271         hret = ehea_h_alloc_resource_eq(adapter->handle,
272                                         &eq->attr, &eq->fw_handle);
273         if (hret != H_SUCCESS) {
274                 ehea_error("alloc_resource_eq failed");
275                 goto out_freemem;
276         }
277
278         ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
279                             EHEA_PAGESIZE, sizeof(struct ehea_eqe));
280         if (ret) {
281                 ehea_error("can't allocate eq pages");
282                 goto out_freeres;
283         }
284
285         for (i = 0; i < eq->attr.nr_pages; i++) {
286                 vpage = hw_qpageit_get_inc(&eq->hw_queue);
287                 if (!vpage) {
288                         ehea_error("hw_qpageit_get_inc failed");
289                         hret = H_RESOURCE;
290                         goto out_kill_hwq;
291                 }
292
293                 rpage = virt_to_abs(vpage);
294
295                 hret = ehea_h_register_rpage(adapter->handle, 0,
296                                              EHEA_EQ_REGISTER_ORIG,
297                                              eq->fw_handle, rpage, 1);
298
299                 if (i == (eq->attr.nr_pages - 1)) {
300                         /* last page */
301                         vpage = hw_qpageit_get_inc(&eq->hw_queue);
302                         if ((hret != H_SUCCESS) || (vpage))
303                                 goto out_kill_hwq;
304
305                 } else {
306                         if ((hret != H_PAGE_REGISTERED) || (!vpage))
307                                 goto out_kill_hwq;
308
309                 }
310         }
311
312         hw_qeit_reset(&eq->hw_queue);
313         return eq;
314
315 out_kill_hwq:
316         hw_queue_dtor(&eq->hw_queue);
317
318 out_freeres:
319         ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
320
321 out_freemem:
322         kfree(eq);
323         return NULL;
324 }
325
326 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
327 {
328         struct ehea_eqe *eqe;
329         unsigned long flags;
330
331         spin_lock_irqsave(&eq->spinlock, flags);
332         eqe = (struct ehea_eqe *)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
333         spin_unlock_irqrestore(&eq->spinlock, flags);
334
335         return eqe;
336 }
337
338 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
339 {
340         u64 hret;
341         unsigned long flags;
342
343         spin_lock_irqsave(&eq->spinlock, flags);
344
345         hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
346         spin_unlock_irqrestore(&eq->spinlock, flags);
347
348         if (hret != H_SUCCESS)
349                 return hret;
350
351         hw_queue_dtor(&eq->hw_queue);
352         kfree(eq);
353
354         return hret;
355 }
356
357 int ehea_destroy_eq(struct ehea_eq *eq)
358 {
359         u64 hret;
360         if (!eq)
361                 return 0;
362
363         hcp_epas_dtor(&eq->epas);
364
365         hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
366         if (hret == H_R_STATE) {
367                 ehea_error_data(eq->adapter, eq->fw_handle);
368                 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
369         }
370
371         if (hret != H_SUCCESS) {
372                 ehea_error("destroy EQ failed");
373                 return -EIO;
374         }
375
376         return 0;
377 }
378
379 /**
380  * allocates memory for a queue and registers pages in phyp
381  */
382 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
383                            int nr_pages, int wqe_size, int act_nr_sges,
384                            struct ehea_adapter *adapter, int h_call_q_selector)
385 {
386         u64 hret, rpage;
387         int ret, cnt;
388         void *vpage;
389
390         ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
391         if (ret)
392                 return ret;
393
394         for (cnt = 0; cnt < nr_pages; cnt++) {
395                 vpage = hw_qpageit_get_inc(hw_queue);
396                 if (!vpage) {
397                         ehea_error("hw_qpageit_get_inc failed");
398                         goto out_kill_hwq;
399                 }
400                 rpage = virt_to_abs(vpage);
401                 hret = ehea_h_register_rpage(adapter->handle,
402                                              0, h_call_q_selector,
403                                              qp->fw_handle, rpage, 1);
404                 if (hret < H_SUCCESS) {
405                         ehea_error("register_rpage_qp failed");
406                         goto out_kill_hwq;
407                 }
408         }
409         hw_qeit_reset(hw_queue);
410         return 0;
411
412 out_kill_hwq:
413         hw_queue_dtor(hw_queue);
414         return -EIO;
415 }
416
417 static inline u32 map_wqe_size(u8 wqe_enc_size)
418 {
419         return 128 << wqe_enc_size;
420 }
421
422 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
423                                u32 pd, struct ehea_qp_init_attr *init_attr)
424 {
425         int ret;
426         u64 hret;
427         struct ehea_qp *qp;
428         u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
429         u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
430
431
432         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
433         if (!qp) {
434                 ehea_error("no mem for qp");
435                 return NULL;
436         }
437
438         qp->adapter = adapter;
439
440         hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
441                                         &qp->fw_handle, &qp->epas);
442         if (hret != H_SUCCESS) {
443                 ehea_error("ehea_h_alloc_resource_qp failed");
444                 goto out_freemem;
445         }
446
447         wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
448         wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
449         wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
450         wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
451
452         ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
453                                      wqe_size_in_bytes_sq,
454                                      init_attr->act_wqe_size_enc_sq, adapter,
455                                      0);
456         if (ret) {
457                 ehea_error("can't register for sq ret=%x", ret);
458                 goto out_freeres;
459         }
460
461         ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
462                                      init_attr->nr_rq1_pages,
463                                      wqe_size_in_bytes_rq1,
464                                      init_attr->act_wqe_size_enc_rq1,
465                                      adapter, 1);
466         if (ret) {
467                 ehea_error("can't register for rq1 ret=%x", ret);
468                 goto out_kill_hwsq;
469         }
470
471         if (init_attr->rq_count > 1) {
472                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
473                                              init_attr->nr_rq2_pages,
474                                              wqe_size_in_bytes_rq2,
475                                              init_attr->act_wqe_size_enc_rq2,
476                                              adapter, 2);
477                 if (ret) {
478                         ehea_error("can't register for rq2 ret=%x", ret);
479                         goto out_kill_hwr1q;
480                 }
481         }
482
483         if (init_attr->rq_count > 2) {
484                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
485                                              init_attr->nr_rq3_pages,
486                                              wqe_size_in_bytes_rq3,
487                                              init_attr->act_wqe_size_enc_rq3,
488                                              adapter, 3);
489                 if (ret) {
490                         ehea_error("can't register for rq3 ret=%x", ret);
491                         goto out_kill_hwr2q;
492                 }
493         }
494
495         qp->init_attr = *init_attr;
496
497         return qp;
498
499 out_kill_hwr2q:
500         hw_queue_dtor(&qp->hw_rqueue2);
501
502 out_kill_hwr1q:
503         hw_queue_dtor(&qp->hw_rqueue1);
504
505 out_kill_hwsq:
506         hw_queue_dtor(&qp->hw_squeue);
507
508 out_freeres:
509         ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
510         ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
511
512 out_freemem:
513         kfree(qp);
514         return NULL;
515 }
516
517 u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
518 {
519         u64 hret;
520         struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
521
522
523         ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
524         hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
525         if (hret != H_SUCCESS)
526                 return hret;
527
528         hw_queue_dtor(&qp->hw_squeue);
529         hw_queue_dtor(&qp->hw_rqueue1);
530
531         if (qp_attr->rq_count > 1)
532                 hw_queue_dtor(&qp->hw_rqueue2);
533         if (qp_attr->rq_count > 2)
534                 hw_queue_dtor(&qp->hw_rqueue3);
535         kfree(qp);
536
537         return hret;
538 }
539
540 int ehea_destroy_qp(struct ehea_qp *qp)
541 {
542         u64 hret;
543         if (!qp)
544                 return 0;
545
546         hcp_epas_dtor(&qp->epas);
547
548         hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
549         if (hret == H_R_STATE) {
550                 ehea_error_data(qp->adapter, qp->fw_handle);
551                 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
552         }
553
554         if (hret != H_SUCCESS) {
555                 ehea_error("destroy QP failed");
556                 return -EIO;
557         }
558
559         return 0;
560 }
561
562 static inline int ehea_calc_index(unsigned long i, unsigned long s)
563 {
564         return (i >> s) & EHEA_INDEX_MASK;
565 }
566
567 static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap,
568                                      int dir)
569 {
570         if(!ehea_top_bmap->dir[dir]) {
571                 ehea_top_bmap->dir[dir] =
572                         kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL);
573                 if (!ehea_top_bmap->dir[dir])
574                         return -ENOMEM;
575         }
576         return 0;
577 }
578
579 static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir)
580 {
581         if(!ehea_bmap->top[top]) {
582                 ehea_bmap->top[top] =
583                         kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL);
584                 if (!ehea_bmap->top[top])
585                         return -ENOMEM;
586         }
587         return ehea_init_top_bmap(ehea_bmap->top[top], dir);
588 }
589
590 static int ehea_create_busmap_callback(unsigned long pfn,
591                                        unsigned long nr_pages, void *arg)
592 {
593         unsigned long i, mr_len, start_section, end_section;
594         start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE;
595         end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
596         mr_len = *(unsigned long *)arg;
597
598         if (!ehea_bmap)
599                 ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
600         if (!ehea_bmap)
601                 return -ENOMEM;
602
603         for (i = start_section; i < end_section; i++) {
604                 int ret;
605                 int top, dir, idx;
606                 u64 vaddr;
607
608                 top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT);
609                 dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT);
610
611                 ret = ehea_init_bmap(ehea_bmap, top, dir);
612                 if(ret)
613                         return ret;
614
615                 idx = i & EHEA_INDEX_MASK;
616                 vaddr = EHEA_BUSMAP_START + mr_len + i * EHEA_SECTSIZE;
617
618                 ehea_bmap->top[top]->dir[dir]->ent[idx] = vaddr;
619         }
620
621         mr_len += nr_pages * PAGE_SIZE;
622         *(unsigned long *)arg = mr_len;
623
624         return 0;
625 }
626
627 static unsigned long ehea_mr_len;
628
629 static DEFINE_MUTEX(ehea_busmap_mutex);
630
631 int ehea_create_busmap(void)
632 {
633         int ret;
634         mutex_lock(&ehea_busmap_mutex);
635         ehea_mr_len = 0;
636         ret = walk_memory_resource(0, 1ULL << MAX_PHYSMEM_BITS, &ehea_mr_len,
637                                    ehea_create_busmap_callback);
638         mutex_unlock(&ehea_busmap_mutex);
639         return ret;
640 }
641
642 void ehea_destroy_busmap(void)
643 {
644         int top, dir;
645         mutex_lock(&ehea_busmap_mutex);
646         if (!ehea_bmap)
647                 goto out_destroy;
648
649         for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
650                 if (!ehea_bmap->top[top])
651                         continue;
652
653                 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
654                         if (!ehea_bmap->top[top]->dir[dir])
655                                 continue;
656
657                         kfree(ehea_bmap->top[top]->dir[dir]);
658                 }
659
660                 kfree(ehea_bmap->top[top]);
661         }
662
663         kfree(ehea_bmap);
664         ehea_bmap = NULL;
665 out_destroy:    
666         mutex_unlock(&ehea_busmap_mutex);
667 }
668
669 u64 ehea_map_vaddr(void *caddr)
670 {
671         int top, dir, idx;
672         unsigned long index, offset;
673
674         if (!ehea_bmap)
675                 return EHEA_INVAL_ADDR;
676
677         index = virt_to_abs(caddr) >> SECTION_SIZE_BITS;
678         top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK;
679         if (!ehea_bmap->top[top])
680                 return EHEA_INVAL_ADDR;
681
682         dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK;
683         if (!ehea_bmap->top[top]->dir[dir])
684                 return EHEA_INVAL_ADDR;
685
686         idx = index & EHEA_INDEX_MASK;
687         if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
688                 return EHEA_INVAL_ADDR;
689
690         offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1);
691         return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset;
692 }
693
694 static inline void *ehea_calc_sectbase(int top, int dir, int idx)
695 {
696         unsigned long ret = idx;
697         ret |= dir << EHEA_DIR_INDEX_SHIFT;
698         ret |= top << EHEA_TOP_INDEX_SHIFT;
699         return abs_to_virt(ret << SECTION_SIZE_BITS);
700 }
701
702 static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt,
703                                struct ehea_adapter *adapter,
704                                struct ehea_mr *mr)
705 {
706         void *pg;
707         u64 j, m, hret;
708         unsigned long k = 0;
709         u64 pt_abs = virt_to_abs(pt);
710
711         void *sectbase = ehea_calc_sectbase(top, dir, idx);
712
713         for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) {
714
715                 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
716                         pg = sectbase + ((k++) * EHEA_PAGESIZE);
717                         pt[m] = virt_to_abs(pg);
718                 }
719                 hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0,
720                                                 0, pt_abs, EHEA_MAX_RPAGE);
721
722                 if ((hret != H_SUCCESS)
723                     && (hret != H_PAGE_REGISTERED)) {
724                         ehea_h_free_resource(adapter->handle, mr->handle,
725                                              FORCE_FREE);
726                         ehea_error("register_rpage_mr failed");
727                         return hret;
728                 }
729         }
730         return hret;
731 }
732
733 static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt,
734                                 struct ehea_adapter *adapter,
735                                 struct ehea_mr *mr)
736 {
737         u64 hret = H_SUCCESS;
738         int idx;
739
740         for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
741                 if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
742                         continue;
743                 
744                 hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr);
745                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
746                                 return hret;
747         }
748         return hret;
749 }
750
751 static u64 ehea_reg_mr_dir_sections(int top, u64 *pt,
752                                     struct ehea_adapter *adapter,
753                                     struct ehea_mr *mr)
754 {
755         u64 hret = H_SUCCESS;
756         int dir;
757
758         for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
759                 if (!ehea_bmap->top[top]->dir[dir])
760                         continue;
761
762                 hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr);
763                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
764                                 return hret;
765         }
766         return hret;
767 }
768
769 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
770 {
771         int ret;
772         u64 *pt;
773         u64 hret;
774         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
775
776         unsigned long top;
777
778         pt = kzalloc(PAGE_SIZE, GFP_KERNEL);
779         if (!pt) {
780                 ehea_error("no mem");
781                 ret = -ENOMEM;
782                 goto out;
783         }
784
785         hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START,
786                                         ehea_mr_len, acc_ctrl, adapter->pd,
787                                         &mr->handle, &mr->lkey);
788
789         if (hret != H_SUCCESS) {
790                 ehea_error("alloc_resource_mr failed");
791                 ret = -EIO;
792                 goto out;
793         }
794
795         if (!ehea_bmap) {
796                 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
797                 ehea_error("no busmap available");
798                 ret = -EIO;
799                 goto out;
800         }
801
802         for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
803                 if (!ehea_bmap->top[top])
804                         continue;
805
806                 hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr);
807                 if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
808                         break;
809         }
810
811         if (hret != H_SUCCESS) {
812                 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
813                 ehea_error("registering mr failed");
814                 ret = -EIO;
815                 goto out;
816         }
817
818         mr->vaddr = EHEA_BUSMAP_START;
819         mr->adapter = adapter;
820         ret = 0;
821 out:
822         kfree(pt);
823         return ret;
824 }
825
826 int ehea_rem_mr(struct ehea_mr *mr)
827 {
828         u64 hret;
829
830         if (!mr || !mr->adapter)
831                 return -EINVAL;
832
833         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
834                                     FORCE_FREE);
835         if (hret != H_SUCCESS) {
836                 ehea_error("destroy MR failed");
837                 return -EIO;
838         }
839
840         return 0;
841 }
842
843 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
844                  struct ehea_mr *shared_mr)
845 {
846         u64 hret;
847
848         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
849                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
850                                    adapter->pd, shared_mr);
851         if (hret != H_SUCCESS)
852                 return -EIO;
853
854         shared_mr->adapter = adapter;
855
856         return 0;
857 }
858
859 void print_error_data(u64 *data)
860 {
861         int length;
862         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
863         u64 resource = data[1];
864
865         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
866
867         if (length > EHEA_PAGESIZE)
868                 length = EHEA_PAGESIZE;
869
870         if (type == 0x8) /* Queue Pair */
871                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
872                            "port=%lX", resource, data[6], data[12], data[22]);
873
874         if (type == 0x4) /* Completion Queue */
875                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
876                            data[6]);
877
878         if (type == 0x3) /* Event Queue */
879                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
880                            data[6]);
881
882         ehea_dump(data, length, "error data");
883 }
884
885 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
886 {
887         unsigned long ret;
888         u64 *rblock;
889
890         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
891         if (!rblock) {
892                 ehea_error("Cannot allocate rblock memory.");
893                 return;
894         }
895
896         ret = ehea_h_error_data(adapter->handle,
897                                 res_handle,
898                                 rblock);
899
900         if (ret == H_R_STATE)
901                 ehea_error("No error data is available: %lX.", res_handle);
902         else if (ret == H_SUCCESS)
903                 print_error_data(rblock);
904         else
905                 ehea_error("Error data could not be fetched: %lX", res_handle);
906
907         kfree(rblock);
908 }