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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / 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 <linux/slab.h>
31 #include "ehea.h"
32 #include "ehea_phyp.h"
33 #include "ehea_qmr.h"
34
35 struct ehea_bmap *ehea_bmap = NULL;
36
37
38
39 static void *hw_qpageit_get_inc(struct hw_queue *queue)
40 {
41 void *retvalue = hw_qeit_get(queue);
42
43 queue->current_q_offset += queue->pagesize;
44 if (queue->current_q_offset > queue->queue_length) {
45 queue->current_q_offset -= queue->pagesize;
46 retvalue = NULL;
47 } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
48 ehea_error("not on pageboundary");
49 retvalue = NULL;
50 }
51 return retvalue;
52 }
53
54 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
55 const u32 pagesize, const u32 qe_size)
56 {
57 int pages_per_kpage = PAGE_SIZE / pagesize;
58 int i, k;
59
60 if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
61 ehea_error("pagesize conflict! kernel pagesize=%d, "
62 "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
63 return -EINVAL;
64 }
65
66 queue->queue_length = nr_of_pages * pagesize;
67 queue->queue_pages = kmalloc(nr_of_pages * sizeof(void *), GFP_KERNEL);
68 if (!queue->queue_pages) {
69 ehea_error("no mem for queue_pages");
70 return -ENOMEM;
71 }
72
73 /*
74 * allocate pages for queue:
75 * outer loop allocates whole kernel pages (page aligned) and
76 * inner loop divides a kernel page into smaller hea queue pages
77 */
78 i = 0;
79 while (i < nr_of_pages) {
80 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
81 if (!kpage)
82 goto out_nomem;
83 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
84 (queue->queue_pages)[i] = (struct ehea_page *)kpage;
85 kpage += pagesize;
86 i++;
87 }
88 }
89
90 queue->current_q_offset = 0;
91 queue->qe_size = qe_size;
92 queue->pagesize = pagesize;
93 queue->toggle_state = 1;
94
95 return 0;
96 out_nomem:
97 for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
98 if (!(queue->queue_pages)[i])
99 break;
100 free_page((unsigned long)(queue->queue_pages)[i]);
101 }
102 return -ENOMEM;
103 }
104
105 static void hw_queue_dtor(struct hw_queue *queue)
106 {
107 int pages_per_kpage = PAGE_SIZE / queue->pagesize;
108 int i, nr_pages;
109
110 if (!queue || !queue->queue_pages)
111 return;
112
113 nr_pages = queue->queue_length / queue->pagesize;
114
115 for (i = 0; i < nr_pages; i += pages_per_kpage)
116 free_page((unsigned long)(queue->queue_pages)[i]);
117
118 kfree(queue->queue_pages);
119 }
120
121 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
122 int nr_of_cqe, u64 eq_handle, u32 cq_token)
123 {
124 struct ehea_cq *cq;
125 struct h_epa epa;
126 u64 *cq_handle_ref, hret, rpage;
127 u32 act_nr_of_entries, act_pages, counter;
128 int ret;
129 void *vpage;
130
131 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
132 if (!cq) {
133 ehea_error("no mem for cq");
134 goto out_nomem;
135 }
136
137 cq->attr.max_nr_of_cqes = nr_of_cqe;
138 cq->attr.cq_token = cq_token;
139 cq->attr.eq_handle = eq_handle;
140
141 cq->adapter = adapter;
142
143 cq_handle_ref = &cq->fw_handle;
144 act_nr_of_entries = 0;
145 act_pages = 0;
146
147 hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
148 &cq->fw_handle, &cq->epas);
149 if (hret != H_SUCCESS) {
150 ehea_error("alloc_resource_cq failed");
151 goto out_freemem;
152 }
153
154 ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
155 EHEA_PAGESIZE, sizeof(struct ehea_cqe));
156 if (ret)
157 goto out_freeres;
158
159 for (counter = 0; counter < cq->attr.nr_pages; counter++) {
160 vpage = hw_qpageit_get_inc(&cq->hw_queue);
161 if (!vpage) {
162 ehea_error("hw_qpageit_get_inc failed");
163 goto out_kill_hwq;
164 }
165
166 rpage = virt_to_abs(vpage);
167 hret = ehea_h_register_rpage(adapter->handle,
168 0, EHEA_CQ_REGISTER_ORIG,
169 cq->fw_handle, rpage, 1);
170 if (hret < H_SUCCESS) {
171 ehea_error("register_rpage_cq failed ehea_cq=%p "
172 "hret=%llx counter=%i act_pages=%i",
173 cq, hret, counter, cq->attr.nr_pages);
174 goto out_kill_hwq;
175 }
176
177 if (counter == (cq->attr.nr_pages - 1)) {
178 vpage = hw_qpageit_get_inc(&cq->hw_queue);
179
180 if ((hret != H_SUCCESS) || (vpage)) {
181 ehea_error("registration of pages not "
182 "complete hret=%llx\n", hret);
183 goto out_kill_hwq;
184 }
185 } else {
186 if (hret != H_PAGE_REGISTERED) {
187 ehea_error("CQ: registration of page failed "
188 "hret=%llx\n", hret);
189 goto out_kill_hwq;
190 }
191 }
192 }
193
194 hw_qeit_reset(&cq->hw_queue);
195 epa = cq->epas.kernel;
196 ehea_reset_cq_ep(cq);
197 ehea_reset_cq_n1(cq);
198
199 return cq;
200
201 out_kill_hwq:
202 hw_queue_dtor(&cq->hw_queue);
203
204 out_freeres:
205 ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
206
207 out_freemem:
208 kfree(cq);
209
210 out_nomem:
211 return NULL;
212 }
213
214 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
215 {
216 u64 hret;
217 u64 adapter_handle = cq->adapter->handle;
218
219 /* deregister all previous registered pages */
220 hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
221 if (hret != H_SUCCESS)
222 return hret;
223
224 hw_queue_dtor(&cq->hw_queue);
225 kfree(cq);
226
227 return hret;
228 }
229
230 int ehea_destroy_cq(struct ehea_cq *cq)
231 {
232 u64 hret;
233 if (!cq)
234 return 0;
235
236 hcp_epas_dtor(&cq->epas);
237 hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
238 if (hret == H_R_STATE) {
239 ehea_error_data(cq->adapter, cq->fw_handle);
240 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
241 }
242
243 if (hret != H_SUCCESS) {
244 ehea_error("destroy CQ failed");
245 return -EIO;
246 }
247
248 return 0;
249 }
250
251 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
252 const enum ehea_eq_type type,
253 const u32 max_nr_of_eqes, const u8 eqe_gen)
254 {
255 int ret, i;
256 u64 hret, rpage;
257 void *vpage;
258 struct ehea_eq *eq;
259
260 eq = kzalloc(sizeof(*eq), GFP_KERNEL);
261 if (!eq) {
262 ehea_error("no mem for eq");
263 return NULL;
264 }
265
266 eq->adapter = adapter;
267 eq->attr.type = type;
268 eq->attr.max_nr_of_eqes = max_nr_of_eqes;
269 eq->attr.eqe_gen = eqe_gen;
270 spin_lock_init(&eq->spinlock);
271
272 hret = ehea_h_alloc_resource_eq(adapter->handle,
273 &eq->attr, &eq->fw_handle);
274 if (hret != H_SUCCESS) {
275 ehea_error("alloc_resource_eq failed");
276 goto out_freemem;
277 }
278
279 ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
280 EHEA_PAGESIZE, sizeof(struct ehea_eqe));
281 if (ret) {
282 ehea_error("can't allocate eq pages");
283 goto out_freeres;
284 }
285
286 for (i = 0; i < eq->attr.nr_pages; i++) {
287 vpage = hw_qpageit_get_inc(&eq->hw_queue);
288 if (!vpage) {
289 ehea_error("hw_qpageit_get_inc failed");
290 hret = H_RESOURCE;
291 goto out_kill_hwq;
292 }
293
294 rpage = virt_to_abs(vpage);
295
296 hret = ehea_h_register_rpage(adapter->handle, 0,
297 EHEA_EQ_REGISTER_ORIG,
298 eq->fw_handle, rpage, 1);
299
300 if (i == (eq->attr.nr_pages - 1)) {
301 /* last page */
302 vpage = hw_qpageit_get_inc(&eq->hw_queue);
303 if ((hret != H_SUCCESS) || (vpage))
304 goto out_kill_hwq;
305
306 } else {
307 if (hret != H_PAGE_REGISTERED)
308 goto out_kill_hwq;
309
310 }
311 }
312
313 hw_qeit_reset(&eq->hw_queue);
314 return eq;
315
316 out_kill_hwq:
317 hw_queue_dtor(&eq->hw_queue);
318
319 out_freeres:
320 ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
321
322 out_freemem:
323 kfree(eq);
324 return NULL;
325 }
326
327 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
328 {
329 struct ehea_eqe *eqe;
330 unsigned long flags;
331
332 spin_lock_irqsave(&eq->spinlock, flags);
333 eqe = (struct ehea_eqe *)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
334 spin_unlock_irqrestore(&eq->spinlock, flags);
335
336 return eqe;
337 }
338
339 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
340 {
341 u64 hret;
342 unsigned long flags;
343
344 spin_lock_irqsave(&eq->spinlock, flags);
345
346 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
347 spin_unlock_irqrestore(&eq->spinlock, flags);
348
349 if (hret != H_SUCCESS)
350 return hret;
351
352 hw_queue_dtor(&eq->hw_queue);
353 kfree(eq);
354
355 return hret;
356 }
357
358 int ehea_destroy_eq(struct ehea_eq *eq)
359 {
360 u64 hret;
361 if (!eq)
362 return 0;
363
364 hcp_epas_dtor(&eq->epas);
365
366 hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
367 if (hret == H_R_STATE) {
368 ehea_error_data(eq->adapter, eq->fw_handle);
369 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
370 }
371
372 if (hret != H_SUCCESS) {
373 ehea_error("destroy EQ failed");
374 return -EIO;
375 }
376
377 return 0;
378 }
379
380 /**
381 * allocates memory for a queue and registers pages in phyp
382 */
383 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
384 int nr_pages, int wqe_size, int act_nr_sges,
385 struct ehea_adapter *adapter, int h_call_q_selector)
386 {
387 u64 hret, rpage;
388 int ret, cnt;
389 void *vpage;
390
391 ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
392 if (ret)
393 return ret;
394
395 for (cnt = 0; cnt < nr_pages; cnt++) {
396 vpage = hw_qpageit_get_inc(hw_queue);
397 if (!vpage) {
398 ehea_error("hw_qpageit_get_inc failed");
399 goto out_kill_hwq;
400 }
401 rpage = virt_to_abs(vpage);
402 hret = ehea_h_register_rpage(adapter->handle,
403 0, h_call_q_selector,
404 qp->fw_handle, rpage, 1);
405 if (hret < H_SUCCESS) {
406 ehea_error("register_rpage_qp failed");
407 goto out_kill_hwq;
408 }
409 }
410 hw_qeit_reset(hw_queue);
411 return 0;
412
413 out_kill_hwq:
414 hw_queue_dtor(hw_queue);
415 return -EIO;
416 }
417
418 static inline u32 map_wqe_size(u8 wqe_enc_size)
419 {
420 return 128 << wqe_enc_size;
421 }
422
423 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
424 u32 pd, struct ehea_qp_init_attr *init_attr)
425 {
426 int ret;
427 u64 hret;
428 struct ehea_qp *qp;
429 u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
430 u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
431
432
433 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
434 if (!qp) {
435 ehea_error("no mem for qp");
436 return NULL;
437 }
438
439 qp->adapter = adapter;
440
441 hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
442 &qp->fw_handle, &qp->epas);
443 if (hret != H_SUCCESS) {
444 ehea_error("ehea_h_alloc_resource_qp failed");
445 goto out_freemem;
446 }
447
448 wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
449 wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
450 wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
451 wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
452
453 ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
454 wqe_size_in_bytes_sq,
455 init_attr->act_wqe_size_enc_sq, adapter,
456 0);
457 if (ret) {
458 ehea_error("can't register for sq ret=%x", ret);
459 goto out_freeres;
460 }
461
462 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
463 init_attr->nr_rq1_pages,
464 wqe_size_in_bytes_rq1,
465 init_attr->act_wqe_size_enc_rq1,
466 adapter, 1);
467 if (ret) {
468 ehea_error("can't register for rq1 ret=%x", ret);
469 goto out_kill_hwsq;
470 }
471
472 if (init_attr->rq_count > 1) {
473 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
474 init_attr->nr_rq2_pages,
475 wqe_size_in_bytes_rq2,
476 init_attr->act_wqe_size_enc_rq2,
477 adapter, 2);
478 if (ret) {
479 ehea_error("can't register for rq2 ret=%x", ret);
480 goto out_kill_hwr1q;
481 }
482 }
483
484 if (init_attr->rq_count > 2) {
485 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
486 init_attr->nr_rq3_pages,
487 wqe_size_in_bytes_rq3,
488 init_attr->act_wqe_size_enc_rq3,
489 adapter, 3);
490 if (ret) {
491 ehea_error("can't register for rq3 ret=%x", ret);
492 goto out_kill_hwr2q;
493 }
494 }
495
496 qp->init_attr = *init_attr;
497
498 return qp;
499
500 out_kill_hwr2q:
501 hw_queue_dtor(&qp->hw_rqueue2);
502
503 out_kill_hwr1q:
504 hw_queue_dtor(&qp->hw_rqueue1);
505
506 out_kill_hwsq:
507 hw_queue_dtor(&qp->hw_squeue);
508
509 out_freeres:
510 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
511 ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
512
513 out_freemem:
514 kfree(qp);
515 return NULL;
516 }
517
518 u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
519 {
520 u64 hret;
521 struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
522
523
524 ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
525 hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
526 if (hret != H_SUCCESS)
527 return hret;
528
529 hw_queue_dtor(&qp->hw_squeue);
530 hw_queue_dtor(&qp->hw_rqueue1);
531
532 if (qp_attr->rq_count > 1)
533 hw_queue_dtor(&qp->hw_rqueue2);
534 if (qp_attr->rq_count > 2)
535 hw_queue_dtor(&qp->hw_rqueue3);
536 kfree(qp);
537
538 return hret;
539 }
540
541 int ehea_destroy_qp(struct ehea_qp *qp)
542 {
543 u64 hret;
544 if (!qp)
545 return 0;
546
547 hcp_epas_dtor(&qp->epas);
548
549 hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
550 if (hret == H_R_STATE) {
551 ehea_error_data(qp->adapter, qp->fw_handle);
552 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
553 }
554
555 if (hret != H_SUCCESS) {
556 ehea_error("destroy QP failed");
557 return -EIO;
558 }
559
560 return 0;
561 }
562
563 static inline int ehea_calc_index(unsigned long i, unsigned long s)
564 {
565 return (i >> s) & EHEA_INDEX_MASK;
566 }
567
568 static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap,
569 int dir)
570 {
571 if (!ehea_top_bmap->dir[dir]) {
572 ehea_top_bmap->dir[dir] =
573 kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL);
574 if (!ehea_top_bmap->dir[dir])
575 return -ENOMEM;
576 }
577 return 0;
578 }
579
580 static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir)
581 {
582 if (!ehea_bmap->top[top]) {
583 ehea_bmap->top[top] =
584 kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL);
585 if (!ehea_bmap->top[top])
586 return -ENOMEM;
587 }
588 return ehea_init_top_bmap(ehea_bmap->top[top], dir);
589 }
590
591 static DEFINE_MUTEX(ehea_busmap_mutex);
592 static unsigned long ehea_mr_len;
593
594 #define EHEA_BUSMAP_ADD_SECT 1
595 #define EHEA_BUSMAP_REM_SECT 0
596
597 static void ehea_rebuild_busmap(void)
598 {
599 u64 vaddr = EHEA_BUSMAP_START;
600 int top, dir, idx;
601
602 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
603 struct ehea_top_bmap *ehea_top;
604 int valid_dir_entries = 0;
605
606 if (!ehea_bmap->top[top])
607 continue;
608 ehea_top = ehea_bmap->top[top];
609 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
610 struct ehea_dir_bmap *ehea_dir;
611 int valid_entries = 0;
612
613 if (!ehea_top->dir[dir])
614 continue;
615 valid_dir_entries++;
616 ehea_dir = ehea_top->dir[dir];
617 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
618 if (!ehea_dir->ent[idx])
619 continue;
620 valid_entries++;
621 ehea_dir->ent[idx] = vaddr;
622 vaddr += EHEA_SECTSIZE;
623 }
624 if (!valid_entries) {
625 ehea_top->dir[dir] = NULL;
626 kfree(ehea_dir);
627 }
628 }
629 if (!valid_dir_entries) {
630 ehea_bmap->top[top] = NULL;
631 kfree(ehea_top);
632 }
633 }
634 }
635
636 static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add)
637 {
638 unsigned long i, start_section, end_section;
639
640 if (!nr_pages)
641 return 0;
642
643 if (!ehea_bmap) {
644 ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
645 if (!ehea_bmap)
646 return -ENOMEM;
647 }
648
649 start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE;
650 end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
651 /* Mark entries as valid or invalid only; address is assigned later */
652 for (i = start_section; i < end_section; i++) {
653 u64 flag;
654 int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT);
655 int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT);
656 int idx = i & EHEA_INDEX_MASK;
657
658 if (add) {
659 int ret = ehea_init_bmap(ehea_bmap, top, dir);
660 if (ret)
661 return ret;
662 flag = 1; /* valid */
663 ehea_mr_len += EHEA_SECTSIZE;
664 } else {
665 if (!ehea_bmap->top[top])
666 continue;
667 if (!ehea_bmap->top[top]->dir[dir])
668 continue;
669 flag = 0; /* invalid */
670 ehea_mr_len -= EHEA_SECTSIZE;
671 }
672
673 ehea_bmap->top[top]->dir[dir]->ent[idx] = flag;
674 }
675 ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */
676 return 0;
677 }
678
679 int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages)
680 {
681 int ret;
682
683 mutex_lock(&ehea_busmap_mutex);
684 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
685 mutex_unlock(&ehea_busmap_mutex);
686 return ret;
687 }
688
689 int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages)
690 {
691 int ret;
692
693 mutex_lock(&ehea_busmap_mutex);
694 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT);
695 mutex_unlock(&ehea_busmap_mutex);
696 return ret;
697 }
698
699 static int ehea_is_hugepage(unsigned long pfn)
700 {
701 int page_order;
702
703 if (pfn & EHEA_HUGEPAGE_PFN_MASK)
704 return 0;
705
706 page_order = compound_order(pfn_to_page(pfn));
707 if (page_order + PAGE_SHIFT != EHEA_HUGEPAGESHIFT)
708 return 0;
709
710 return 1;
711 }
712
713 static int ehea_create_busmap_callback(unsigned long initial_pfn,
714 unsigned long total_nr_pages, void *arg)
715 {
716 int ret;
717 unsigned long pfn, start_pfn, end_pfn, nr_pages;
718
719 if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE)
720 return ehea_update_busmap(initial_pfn, total_nr_pages,
721 EHEA_BUSMAP_ADD_SECT);
722
723 /* Given chunk is >= 16GB -> check for hugepages */
724 start_pfn = initial_pfn;
725 end_pfn = initial_pfn + total_nr_pages;
726 pfn = start_pfn;
727
728 while (pfn < end_pfn) {
729 if (ehea_is_hugepage(pfn)) {
730 /* Add mem found in front of the hugepage */
731 nr_pages = pfn - start_pfn;
732 ret = ehea_update_busmap(start_pfn, nr_pages,
733 EHEA_BUSMAP_ADD_SECT);
734 if (ret)
735 return ret;
736
737 /* Skip the hugepage */
738 pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE);
739 start_pfn = pfn;
740 } else
741 pfn += (EHEA_SECTSIZE / PAGE_SIZE);
742 }
743
744 /* Add mem found behind the hugepage(s) */
745 nr_pages = pfn - start_pfn;
746 return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
747 }
748
749 int ehea_create_busmap(void)
750 {
751 int ret;
752
753 mutex_lock(&ehea_busmap_mutex);
754 ehea_mr_len = 0;
755 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
756 ehea_create_busmap_callback);
757 mutex_unlock(&ehea_busmap_mutex);
758 return ret;
759 }
760
761 void ehea_destroy_busmap(void)
762 {
763 int top, dir;
764 mutex_lock(&ehea_busmap_mutex);
765 if (!ehea_bmap)
766 goto out_destroy;
767
768 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
769 if (!ehea_bmap->top[top])
770 continue;
771
772 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
773 if (!ehea_bmap->top[top]->dir[dir])
774 continue;
775
776 kfree(ehea_bmap->top[top]->dir[dir]);
777 }
778
779 kfree(ehea_bmap->top[top]);
780 }
781
782 kfree(ehea_bmap);
783 ehea_bmap = NULL;
784 out_destroy:
785 mutex_unlock(&ehea_busmap_mutex);
786 }
787
788 u64 ehea_map_vaddr(void *caddr)
789 {
790 int top, dir, idx;
791 unsigned long index, offset;
792
793 if (!ehea_bmap)
794 return EHEA_INVAL_ADDR;
795
796 index = virt_to_abs(caddr) >> SECTION_SIZE_BITS;
797 top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK;
798 if (!ehea_bmap->top[top])
799 return EHEA_INVAL_ADDR;
800
801 dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK;
802 if (!ehea_bmap->top[top]->dir[dir])
803 return EHEA_INVAL_ADDR;
804
805 idx = index & EHEA_INDEX_MASK;
806 if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
807 return EHEA_INVAL_ADDR;
808
809 offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1);
810 return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset;
811 }
812
813 static inline void *ehea_calc_sectbase(int top, int dir, int idx)
814 {
815 unsigned long ret = idx;
816 ret |= dir << EHEA_DIR_INDEX_SHIFT;
817 ret |= top << EHEA_TOP_INDEX_SHIFT;
818 return abs_to_virt(ret << SECTION_SIZE_BITS);
819 }
820
821 static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt,
822 struct ehea_adapter *adapter,
823 struct ehea_mr *mr)
824 {
825 void *pg;
826 u64 j, m, hret;
827 unsigned long k = 0;
828 u64 pt_abs = virt_to_abs(pt);
829
830 void *sectbase = ehea_calc_sectbase(top, dir, idx);
831
832 for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) {
833
834 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
835 pg = sectbase + ((k++) * EHEA_PAGESIZE);
836 pt[m] = virt_to_abs(pg);
837 }
838 hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0,
839 0, pt_abs, EHEA_MAX_RPAGE);
840
841 if ((hret != H_SUCCESS) &&
842 (hret != H_PAGE_REGISTERED)) {
843 ehea_h_free_resource(adapter->handle, mr->handle,
844 FORCE_FREE);
845 ehea_error("register_rpage_mr failed");
846 return hret;
847 }
848 }
849 return hret;
850 }
851
852 static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt,
853 struct ehea_adapter *adapter,
854 struct ehea_mr *mr)
855 {
856 u64 hret = H_SUCCESS;
857 int idx;
858
859 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
860 if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
861 continue;
862
863 hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr);
864 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
865 return hret;
866 }
867 return hret;
868 }
869
870 static u64 ehea_reg_mr_dir_sections(int top, u64 *pt,
871 struct ehea_adapter *adapter,
872 struct ehea_mr *mr)
873 {
874 u64 hret = H_SUCCESS;
875 int dir;
876
877 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
878 if (!ehea_bmap->top[top]->dir[dir])
879 continue;
880
881 hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr);
882 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
883 return hret;
884 }
885 return hret;
886 }
887
888 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
889 {
890 int ret;
891 u64 *pt;
892 u64 hret;
893 u32 acc_ctrl = EHEA_MR_ACC_CTRL;
894
895 unsigned long top;
896
897 pt = (void *)get_zeroed_page(GFP_KERNEL);
898 if (!pt) {
899 ehea_error("no mem");
900 ret = -ENOMEM;
901 goto out;
902 }
903
904 hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START,
905 ehea_mr_len, acc_ctrl, adapter->pd,
906 &mr->handle, &mr->lkey);
907
908 if (hret != H_SUCCESS) {
909 ehea_error("alloc_resource_mr failed");
910 ret = -EIO;
911 goto out;
912 }
913
914 if (!ehea_bmap) {
915 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
916 ehea_error("no busmap available");
917 ret = -EIO;
918 goto out;
919 }
920
921 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
922 if (!ehea_bmap->top[top])
923 continue;
924
925 hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr);
926 if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
927 break;
928 }
929
930 if (hret != H_SUCCESS) {
931 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
932 ehea_error("registering mr failed");
933 ret = -EIO;
934 goto out;
935 }
936
937 mr->vaddr = EHEA_BUSMAP_START;
938 mr->adapter = adapter;
939 ret = 0;
940 out:
941 free_page((unsigned long)pt);
942 return ret;
943 }
944
945 int ehea_rem_mr(struct ehea_mr *mr)
946 {
947 u64 hret;
948
949 if (!mr || !mr->adapter)
950 return -EINVAL;
951
952 hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
953 FORCE_FREE);
954 if (hret != H_SUCCESS) {
955 ehea_error("destroy MR failed");
956 return -EIO;
957 }
958
959 return 0;
960 }
961
962 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
963 struct ehea_mr *shared_mr)
964 {
965 u64 hret;
966
967 hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
968 old_mr->vaddr, EHEA_MR_ACC_CTRL,
969 adapter->pd, shared_mr);
970 if (hret != H_SUCCESS)
971 return -EIO;
972
973 shared_mr->adapter = adapter;
974
975 return 0;
976 }
977
978 void print_error_data(u64 *data)
979 {
980 int length;
981 u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
982 u64 resource = data[1];
983
984 length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
985
986 if (length > EHEA_PAGESIZE)
987 length = EHEA_PAGESIZE;
988
989 if (type == 0x8) /* Queue Pair */
990 ehea_error("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, "
991 "port=%llX", resource, data[6], data[12], data[22]);
992
993 if (type == 0x4) /* Completion Queue */
994 ehea_error("CQ (resource=%llX) state: AER=0x%llX", resource,
995 data[6]);
996
997 if (type == 0x3) /* Event Queue */
998 ehea_error("EQ (resource=%llX) state: AER=0x%llX", resource,
999 data[6]);
1000
1001 ehea_dump(data, length, "error data");
1002 }
1003
1004 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
1005 {
1006 unsigned long ret;
1007 u64 *rblock;
1008
1009 rblock = (void *)get_zeroed_page(GFP_KERNEL);
1010 if (!rblock) {
1011 ehea_error("Cannot allocate rblock memory.");
1012 return;
1013 }
1014
1015 ret = ehea_h_error_data(adapter->handle,
1016 res_handle,
1017 rblock);
1018
1019 if (ret == H_R_STATE)
1020 ehea_error("No error data is available: %llX.", res_handle);
1021 else if (ret == H_SUCCESS)
1022 print_error_data(rblock);
1023 else
1024 ehea_error("Error data could not be fetched: %llX", res_handle);
1025
1026 free_page((unsigned long)rblock);
1027 }
kernel source for telekom puls (alcatel/mediatek)