Merge branch 'for-2.6.22' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus...
[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 static void *hw_qpageit_get_inc(struct hw_queue *queue)
35 {
36         void *retvalue = hw_qeit_get(queue);
37
38         queue->current_q_offset += queue->pagesize;
39         if (queue->current_q_offset > queue->queue_length) {
40                 queue->current_q_offset -= queue->pagesize;
41                 retvalue = NULL;
42         } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
43                 ehea_error("not on pageboundary");
44                 retvalue = NULL;
45         }
46         return retvalue;
47 }
48
49 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
50                           const u32 pagesize, const u32 qe_size)
51 {
52         int pages_per_kpage = PAGE_SIZE / pagesize;
53         int i, k;
54
55         if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
56                 ehea_error("pagesize conflict! kernel pagesize=%d, "
57                            "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
58                 return -EINVAL;
59         }
60
61         queue->queue_length = nr_of_pages * pagesize;
62         queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
63         if (!queue->queue_pages) {
64                 ehea_error("no mem for queue_pages");
65                 return -ENOMEM;
66         }
67
68         /*
69          * allocate pages for queue:
70          * outer loop allocates whole kernel pages (page aligned) and
71          * inner loop divides a kernel page into smaller hea queue pages
72          */
73         i = 0;
74         while (i < nr_of_pages) {
75                 u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
76                 if (!kpage)
77                         goto out_nomem;
78                 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
79                         (queue->queue_pages)[i] = (struct ehea_page*)kpage;
80                         kpage += pagesize;
81                         i++;
82                 }
83         }
84
85         queue->current_q_offset = 0;
86         queue->qe_size = qe_size;
87         queue->pagesize = pagesize;
88         queue->toggle_state = 1;
89
90         return 0;
91 out_nomem:
92         for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
93                 if (!(queue->queue_pages)[i])
94                         break;
95                 free_page((unsigned long)(queue->queue_pages)[i]);
96         }
97         return -ENOMEM;
98 }
99
100 static void hw_queue_dtor(struct hw_queue *queue)
101 {
102         int pages_per_kpage = PAGE_SIZE / queue->pagesize;
103         int i, nr_pages;
104
105         if (!queue || !queue->queue_pages)
106                 return;
107
108         nr_pages = queue->queue_length / queue->pagesize;
109
110         for (i = 0; i < nr_pages; i += pages_per_kpage)
111                 free_page((unsigned long)(queue->queue_pages)[i]);
112
113         kfree(queue->queue_pages);
114 }
115
116 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
117                                int nr_of_cqe, u64 eq_handle, u32 cq_token)
118 {
119         struct ehea_cq *cq;
120         struct h_epa epa;
121         u64 *cq_handle_ref, hret, rpage;
122         u32 act_nr_of_entries, act_pages, counter;
123         int ret;
124         void *vpage;
125
126         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
127         if (!cq) {
128                 ehea_error("no mem for cq");
129                 goto out_nomem;
130         }
131
132         cq->attr.max_nr_of_cqes = nr_of_cqe;
133         cq->attr.cq_token = cq_token;
134         cq->attr.eq_handle = eq_handle;
135
136         cq->adapter = adapter;
137
138         cq_handle_ref = &cq->fw_handle;
139         act_nr_of_entries = 0;
140         act_pages = 0;
141
142         hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
143                                         &cq->fw_handle, &cq->epas);
144         if (hret != H_SUCCESS) {
145                 ehea_error("alloc_resource_cq failed");
146                 goto out_freemem;
147         }
148
149         ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
150                             EHEA_PAGESIZE, sizeof(struct ehea_cqe));
151         if (ret)
152                 goto out_freeres;
153
154         for (counter = 0; counter < cq->attr.nr_pages; counter++) {
155                 vpage = hw_qpageit_get_inc(&cq->hw_queue);
156                 if (!vpage) {
157                         ehea_error("hw_qpageit_get_inc failed");
158                         goto out_kill_hwq;
159                 }
160
161                 rpage = virt_to_abs(vpage);
162                 hret = ehea_h_register_rpage(adapter->handle,
163                                              0, EHEA_CQ_REGISTER_ORIG,
164                                              cq->fw_handle, rpage, 1);
165                 if (hret < H_SUCCESS) {
166                         ehea_error("register_rpage_cq failed ehea_cq=%p "
167                                    "hret=%lx counter=%i act_pages=%i",
168                                    cq, hret, counter, cq->attr.nr_pages);
169                         goto out_kill_hwq;
170                 }
171
172                 if (counter == (cq->attr.nr_pages - 1)) {
173                         vpage = hw_qpageit_get_inc(&cq->hw_queue);
174
175                         if ((hret != H_SUCCESS) || (vpage)) {
176                                 ehea_error("registration of pages not "
177                                            "complete hret=%lx\n", hret);
178                                 goto out_kill_hwq;
179                         }
180                 } else {
181                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
182                                 ehea_error("CQ: registration of page failed "
183                                            "hret=%lx\n", hret);
184                                 goto out_kill_hwq;
185                         }
186                 }
187         }
188
189         hw_qeit_reset(&cq->hw_queue);
190         epa = cq->epas.kernel;
191         ehea_reset_cq_ep(cq);
192         ehea_reset_cq_n1(cq);
193
194         return cq;
195
196 out_kill_hwq:
197         hw_queue_dtor(&cq->hw_queue);
198
199 out_freeres:
200         ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
201
202 out_freemem:
203         kfree(cq);
204
205 out_nomem:
206         return NULL;
207 }
208
209 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
210 {
211         u64 hret;
212         u64 adapter_handle = cq->adapter->handle;
213
214         /* deregister all previous registered pages */
215         hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
216         if (hret != H_SUCCESS)
217                 return hret;
218
219         hw_queue_dtor(&cq->hw_queue);
220         kfree(cq);
221
222         return hret;
223 }
224
225 int ehea_destroy_cq(struct ehea_cq *cq)
226 {
227         u64 hret;
228         if (!cq)
229                 return 0;
230
231         if ((hret = ehea_destroy_cq_res(cq, NORMAL_FREE)) == H_R_STATE) {
232                 ehea_error_data(cq->adapter, cq->fw_handle);
233                 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
234         }
235
236         if (hret != H_SUCCESS) {
237                 ehea_error("destroy CQ failed");
238                 return -EIO;
239         }
240
241         return 0;
242 }
243
244 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
245                                const enum ehea_eq_type type,
246                                const u32 max_nr_of_eqes, const u8 eqe_gen)
247 {
248         int ret, i;
249         u64 hret, rpage;
250         void *vpage;
251         struct ehea_eq *eq;
252
253         eq = kzalloc(sizeof(*eq), GFP_KERNEL);
254         if (!eq) {
255                 ehea_error("no mem for eq");
256                 return NULL;
257         }
258
259         eq->adapter = adapter;
260         eq->attr.type = type;
261         eq->attr.max_nr_of_eqes = max_nr_of_eqes;
262         eq->attr.eqe_gen = eqe_gen;
263         spin_lock_init(&eq->spinlock);
264
265         hret = ehea_h_alloc_resource_eq(adapter->handle,
266                                         &eq->attr, &eq->fw_handle);
267         if (hret != H_SUCCESS) {
268                 ehea_error("alloc_resource_eq failed");
269                 goto out_freemem;
270         }
271
272         ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
273                             EHEA_PAGESIZE, sizeof(struct ehea_eqe));
274         if (ret) {
275                 ehea_error("can't allocate eq pages");
276                 goto out_freeres;
277         }
278
279         for (i = 0; i < eq->attr.nr_pages; i++) {
280                 vpage = hw_qpageit_get_inc(&eq->hw_queue);
281                 if (!vpage) {
282                         ehea_error("hw_qpageit_get_inc failed");
283                         hret = H_RESOURCE;
284                         goto out_kill_hwq;
285                 }
286
287                 rpage = virt_to_abs(vpage);
288
289                 hret = ehea_h_register_rpage(adapter->handle, 0,
290                                              EHEA_EQ_REGISTER_ORIG,
291                                              eq->fw_handle, rpage, 1);
292
293                 if (i == (eq->attr.nr_pages - 1)) {
294                         /* last page */
295                         vpage = hw_qpageit_get_inc(&eq->hw_queue);
296                         if ((hret != H_SUCCESS) || (vpage)) {
297                                 goto out_kill_hwq;
298                         }
299                 } else {
300                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
301                                 goto out_kill_hwq;
302                         }
303                 }
304         }
305
306         hw_qeit_reset(&eq->hw_queue);
307         return eq;
308
309 out_kill_hwq:
310         hw_queue_dtor(&eq->hw_queue);
311
312 out_freeres:
313         ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
314
315 out_freemem:
316         kfree(eq);
317         return NULL;
318 }
319
320 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
321 {
322         struct ehea_eqe *eqe;
323         unsigned long flags;
324
325         spin_lock_irqsave(&eq->spinlock, flags);
326         eqe = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
327         spin_unlock_irqrestore(&eq->spinlock, flags);
328
329         return eqe;
330 }
331
332 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
333 {
334         u64 hret;
335         unsigned long flags;
336
337         spin_lock_irqsave(&eq->spinlock, flags);
338
339         hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
340         spin_unlock_irqrestore(&eq->spinlock, flags);
341
342         if (hret != H_SUCCESS)
343                 return hret;
344
345         hw_queue_dtor(&eq->hw_queue);
346         kfree(eq);
347
348         return hret;
349 }
350
351 int ehea_destroy_eq(struct ehea_eq *eq)
352 {
353         u64 hret;
354         if (!eq)
355                 return 0;
356
357         if ((hret = ehea_destroy_eq_res(eq, NORMAL_FREE)) == H_R_STATE) {
358                 ehea_error_data(eq->adapter, eq->fw_handle);
359                 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
360         }
361
362         if (hret != H_SUCCESS) {
363                 ehea_error("destroy EQ failed");
364                 return -EIO;
365         }
366
367         return 0;
368 }
369
370 /**
371  * allocates memory for a queue and registers pages in phyp
372  */
373 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
374                            int nr_pages, int wqe_size, int act_nr_sges,
375                            struct ehea_adapter *adapter, int h_call_q_selector)
376 {
377         u64 hret, rpage;
378         int ret, cnt;
379         void *vpage;
380
381         ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
382         if (ret)
383                 return ret;
384
385         for (cnt = 0; cnt < nr_pages; cnt++) {
386                 vpage = hw_qpageit_get_inc(hw_queue);
387                 if (!vpage) {
388                         ehea_error("hw_qpageit_get_inc failed");
389                         goto out_kill_hwq;
390                 }
391                 rpage = virt_to_abs(vpage);
392                 hret = ehea_h_register_rpage(adapter->handle,
393                                              0, h_call_q_selector,
394                                              qp->fw_handle, rpage, 1);
395                 if (hret < H_SUCCESS) {
396                         ehea_error("register_rpage_qp failed");
397                         goto out_kill_hwq;
398                 }
399         }
400         hw_qeit_reset(hw_queue);
401         return 0;
402
403 out_kill_hwq:
404         hw_queue_dtor(hw_queue);
405         return -EIO;
406 }
407
408 static inline u32 map_wqe_size(u8 wqe_enc_size)
409 {
410         return 128 << wqe_enc_size;
411 }
412
413 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
414                                u32 pd, struct ehea_qp_init_attr *init_attr)
415 {
416         int ret;
417         u64 hret;
418         struct ehea_qp *qp;
419         u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
420         u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
421
422
423         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
424         if (!qp) {
425                 ehea_error("no mem for qp");
426                 return NULL;
427         }
428
429         qp->adapter = adapter;
430
431         hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
432                                         &qp->fw_handle, &qp->epas);
433         if (hret != H_SUCCESS) {
434                 ehea_error("ehea_h_alloc_resource_qp failed");
435                 goto out_freemem;
436         }
437
438         wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
439         wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
440         wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
441         wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
442
443         ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
444                                      wqe_size_in_bytes_sq,
445                                      init_attr->act_wqe_size_enc_sq, adapter,
446                                      0);
447         if (ret) {
448                 ehea_error("can't register for sq ret=%x", ret);
449                 goto out_freeres;
450         }
451
452         ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
453                                      init_attr->nr_rq1_pages,
454                                      wqe_size_in_bytes_rq1,
455                                      init_attr->act_wqe_size_enc_rq1,
456                                      adapter, 1);
457         if (ret) {
458                 ehea_error("can't register for rq1 ret=%x", ret);
459                 goto out_kill_hwsq;
460         }
461
462         if (init_attr->rq_count > 1) {
463                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
464                                              init_attr->nr_rq2_pages,
465                                              wqe_size_in_bytes_rq2,
466                                              init_attr->act_wqe_size_enc_rq2,
467                                              adapter, 2);
468                 if (ret) {
469                         ehea_error("can't register for rq2 ret=%x", ret);
470                         goto out_kill_hwr1q;
471                 }
472         }
473
474         if (init_attr->rq_count > 2) {
475                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
476                                              init_attr->nr_rq3_pages,
477                                              wqe_size_in_bytes_rq3,
478                                              init_attr->act_wqe_size_enc_rq3,
479                                              adapter, 3);
480                 if (ret) {
481                         ehea_error("can't register for rq3 ret=%x", ret);
482                         goto out_kill_hwr2q;
483                 }
484         }
485
486         qp->init_attr = *init_attr;
487
488         return qp;
489
490 out_kill_hwr2q:
491         hw_queue_dtor(&qp->hw_rqueue2);
492
493 out_kill_hwr1q:
494         hw_queue_dtor(&qp->hw_rqueue1);
495
496 out_kill_hwsq:
497         hw_queue_dtor(&qp->hw_squeue);
498
499 out_freeres:
500         ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
501         ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
502
503 out_freemem:
504         kfree(qp);
505         return NULL;
506 }
507
508 u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
509 {
510         u64 hret;
511         struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
512
513
514         ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
515         hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
516         if (hret != H_SUCCESS)
517                 return hret;
518
519         hw_queue_dtor(&qp->hw_squeue);
520         hw_queue_dtor(&qp->hw_rqueue1);
521
522         if (qp_attr->rq_count > 1)
523                 hw_queue_dtor(&qp->hw_rqueue2);
524         if (qp_attr->rq_count > 2)
525                 hw_queue_dtor(&qp->hw_rqueue3);
526         kfree(qp);
527
528         return hret;
529 }
530
531 int ehea_destroy_qp(struct ehea_qp *qp)
532 {
533         u64 hret;
534         if (!qp)
535                 return 0;
536
537         if ((hret = ehea_destroy_qp_res(qp, NORMAL_FREE)) == H_R_STATE) {
538                 ehea_error_data(qp->adapter, qp->fw_handle);
539                 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
540         }
541
542         if (hret != H_SUCCESS) {
543                 ehea_error("destroy QP failed");
544                 return -EIO;
545         }
546
547         return 0;
548 }
549
550 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
551 {
552         int i, k, ret;
553         u64 hret, pt_abs, start, end, nr_pages;
554         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
555         u64 *pt;
556
557         start = KERNELBASE;
558         end = (u64)high_memory;
559         nr_pages = (end - start) / EHEA_PAGESIZE;
560
561         pt =  kzalloc(PAGE_SIZE, GFP_KERNEL);
562         if (!pt) {
563                 ehea_error("no mem");
564                 ret = -ENOMEM;
565                 goto out;
566         }
567         pt_abs = virt_to_abs(pt);
568
569         hret = ehea_h_alloc_resource_mr(adapter->handle, start, end - start,
570                                         acc_ctrl, adapter->pd,
571                                         &mr->handle, &mr->lkey);
572         if (hret != H_SUCCESS) {
573                 ehea_error("alloc_resource_mr failed");
574                 ret = -EIO;
575                 goto out;
576         }
577
578         mr->vaddr = KERNELBASE;
579         k = 0;
580
581         while (nr_pages > 0) {
582                 if (nr_pages > 1) {
583                         u64 num_pages = min(nr_pages, (u64)512);
584                         for (i = 0; i < num_pages; i++)
585                                 pt[i] = virt_to_abs((void*)(((u64)start) +
586                                                             ((k++) *
587                                                              EHEA_PAGESIZE)));
588
589                         hret = ehea_h_register_rpage_mr(adapter->handle,
590                                                         mr->handle, 0,
591                                                         0, (u64)pt_abs,
592                                                         num_pages);
593                         nr_pages -= num_pages;
594                 } else {
595                         u64 abs_adr = virt_to_abs((void*)(((u64)start) +
596                                                           (k * EHEA_PAGESIZE)));
597
598                         hret = ehea_h_register_rpage_mr(adapter->handle,
599                                                         mr->handle, 0,
600                                                         0, abs_adr,1);
601                         nr_pages--;
602                 }
603
604                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) {
605                         ehea_h_free_resource(adapter->handle,
606                                              mr->handle, FORCE_FREE);
607                         ehea_error("register_rpage_mr failed");
608                         ret = -EIO;
609                         goto out;
610                 }
611         }
612
613         if (hret != H_SUCCESS) {
614                 ehea_h_free_resource(adapter->handle, mr->handle,
615                                      FORCE_FREE);
616                 ehea_error("register_rpage failed for last page");
617                 ret = -EIO;
618                 goto out;
619         }
620
621         mr->adapter = adapter;
622         ret = 0;
623 out:
624         kfree(pt);
625         return ret;
626 }
627
628 int ehea_rem_mr(struct ehea_mr *mr)
629 {
630         u64 hret;
631
632         if (!mr || !mr->adapter)
633                 return -EINVAL;
634
635         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
636                                     FORCE_FREE);
637         if (hret != H_SUCCESS) {
638                 ehea_error("destroy MR failed");
639                 return -EIO;
640         }
641
642         return 0;
643 }
644
645 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
646                  struct ehea_mr *shared_mr)
647 {
648         u64 hret;
649
650         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
651                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
652                                    adapter->pd, shared_mr);
653         if (hret != H_SUCCESS)
654                 return -EIO;
655
656         shared_mr->adapter = adapter;
657
658         return 0;
659 }
660
661 void print_error_data(u64 *data)
662 {
663         int length;
664         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
665         u64 resource = data[1];
666
667         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
668
669         if (length > EHEA_PAGESIZE)
670                 length = EHEA_PAGESIZE;
671
672         if (type == 0x8) /* Queue Pair */
673                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
674                            "port=%lX", resource, data[6], data[12], data[22]);
675
676         if (type == 0x4) /* Completion Queue */
677                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
678                            data[6]);
679
680         if (type == 0x3) /* Event Queue */
681                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
682                            data[6]);
683
684         ehea_dump(data, length, "error data");
685 }
686
687 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
688 {
689         unsigned long ret;
690         u64 *rblock;
691
692         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
693         if (!rblock) {
694                 ehea_error("Cannot allocate rblock memory.");
695                 return;
696         }
697
698         ret = ehea_h_error_data(adapter->handle,
699                                 res_handle,
700                                 rblock);
701
702         if (ret == H_R_STATE)
703                 ehea_error("No error data is available: %lX.", res_handle);
704         else if (ret == H_SUCCESS)
705                 print_error_data(rblock);
706         else
707                 ehea_error("Error data could not be fetched: %lX", res_handle);
708
709         kfree(rblock);
710 }