Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  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 
 35 struct ehea_busmap ehea_bmap = { 0, 0, NULL };
 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 int ehea_create_busmap(void)
563 {
564         u64 vaddr = EHEA_BUSMAP_START;
565         unsigned long high_section_index = 0;
566         int i;
567 
568         /*
569          * Sections are not in ascending order -> Loop over all sections and
570          * find the highest PFN to compute the required map size.
571         */
572         ehea_bmap.valid_sections = 0;
573 
574         for (i = 0; i < NR_MEM_SECTIONS; i++)
575                 if (valid_section_nr(i))
576                         high_section_index = i;
577 
578         ehea_bmap.entries = high_section_index + 1;
579         ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr));
580 
581         if (!ehea_bmap.vaddr)
582                 return -ENOMEM;
583 
584         for (i = 0 ; i < ehea_bmap.entries; i++) {
585                 unsigned long pfn = section_nr_to_pfn(i);
586 
587                 if (pfn_valid(pfn)) {
588                         ehea_bmap.vaddr[i] = vaddr;
589                         vaddr += EHEA_SECTSIZE;
590                         ehea_bmap.valid_sections++;
591                 } else
592                         ehea_bmap.vaddr[i] = 0;
593         }
594 
595         return 0;
596 }
597 
598 void ehea_destroy_busmap(void)
599 {
600         vfree(ehea_bmap.vaddr);
601 }
602 
603 u64 ehea_map_vaddr(void *caddr)
604 {
605         u64 mapped_addr;
606         unsigned long index = __pa(caddr) >> SECTION_SIZE_BITS;
607 
608         if (likely(index < ehea_bmap.entries)) {
609                 mapped_addr = ehea_bmap.vaddr[index];
610                 if (likely(mapped_addr))
611                         mapped_addr |= (((unsigned long)caddr)
612                                         & (EHEA_SECTSIZE - 1));
613                 else
614                         mapped_addr = -1;
615         } else
616                 mapped_addr = -1;
617 
618         if (unlikely(mapped_addr == -1))
619                 if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
620                         schedule_work(&ehea_rereg_mr_task);
621 
622         return mapped_addr;
623 }
624 
625 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
626 {
627         int ret;
628         u64 *pt;
629         void *pg;
630         u64 hret, pt_abs, i, j, m, mr_len;
631         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
632 
633         mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
634 
635         pt =  kzalloc(PAGE_SIZE, GFP_KERNEL);
636         if (!pt) {
637                 ehea_error("no mem");
638                 ret = -ENOMEM;
639                 goto out;
640         }
641         pt_abs = virt_to_abs(pt);
642 
643         hret = ehea_h_alloc_resource_mr(adapter->handle,
644                                         EHEA_BUSMAP_START, mr_len,
645                                         acc_ctrl, adapter->pd,
646                                         &mr->handle, &mr->lkey);
647         if (hret != H_SUCCESS) {
648                 ehea_error("alloc_resource_mr failed");
649                 ret = -EIO;
650                 goto out;
651         }
652 
653         for (i = 0 ; i < ehea_bmap.entries; i++)
654                 if (ehea_bmap.vaddr[i]) {
655                         void *sectbase = __va(i << SECTION_SIZE_BITS);
656                         unsigned long k = 0;
657 
658                         for (j = 0; j < (EHEA_PAGES_PER_SECTION /
659                                          EHEA_MAX_RPAGE); j++) {
660 
661                                 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
662                                         pg = sectbase + ((k++) * EHEA_PAGESIZE);
663                                         pt[m] = virt_to_abs(pg);
664                                 }
665 
666                                 hret = ehea_h_register_rpage_mr(adapter->handle,
667                                                                 mr->handle,
668                                                                 0, 0, pt_abs,
669                                                                 EHEA_MAX_RPAGE);
670                                 if ((hret != H_SUCCESS)
671                                     && (hret != H_PAGE_REGISTERED)) {
672                                         ehea_h_free_resource(adapter->handle,
673                                                              mr->handle,
674                                                              FORCE_FREE);
675                                         ehea_error("register_rpage_mr failed");
676                                         ret = -EIO;
677                                         goto out;
678                                 }
679                         }
680                 }
681 
682         if (hret != H_SUCCESS) {
683                 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
684                 ehea_error("registering mr failed");
685                 ret = -EIO;
686                 goto out;
687         }
688 
689         mr->vaddr = EHEA_BUSMAP_START;
690         mr->adapter = adapter;
691         ret = 0;
692 out:
693         kfree(pt);
694         return ret;
695 }
696 
697 int ehea_rem_mr(struct ehea_mr *mr)
698 {
699         u64 hret;
700 
701         if (!mr || !mr->adapter)
702                 return -EINVAL;
703 
704         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
705                                     FORCE_FREE);
706         if (hret != H_SUCCESS) {
707                 ehea_error("destroy MR failed");
708                 return -EIO;
709         }
710 
711         return 0;
712 }
713 
714 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
715                  struct ehea_mr *shared_mr)
716 {
717         u64 hret;
718 
719         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
720                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
721                                    adapter->pd, shared_mr);
722         if (hret != H_SUCCESS)
723                 return -EIO;
724 
725         shared_mr->adapter = adapter;
726 
727         return 0;
728 }
729 
730 void print_error_data(u64 *data)
731 {
732         int length;
733         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
734         u64 resource = data[1];
735 
736         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
737 
738         if (length > EHEA_PAGESIZE)
739                 length = EHEA_PAGESIZE;
740 
741         if (type == 0x8) /* Queue Pair */
742                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
743                            "port=%lX", resource, data[6], data[12], data[22]);
744 
745         if (type == 0x4) /* Completion Queue */
746                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
747                            data[6]);
748 
749         if (type == 0x3) /* Event Queue */
750                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
751                            data[6]);
752 
753         ehea_dump(data, length, "error data");
754 }
755 
756 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
757 {
758         unsigned long ret;
759         u64 *rblock;
760 
761         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
762         if (!rblock) {
763                 ehea_error("Cannot allocate rblock memory.");
764                 return;
765         }
766 
767         ret = ehea_h_error_data(adapter->handle,
768                                 res_handle,
769                                 rblock);
770 
771         if (ret == H_R_STATE)
772                 ehea_error("No error data is available: %lX.", res_handle);
773         else if (ret == H_SUCCESS)
774                 print_error_data(rblock);
775         else
776                 ehea_error("Error data could not be fetched: %lX", res_handle);
777 
778         kfree(rblock);
779 }
780 
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