blob: d522e905f460585364a659d8f8cfb2c11d818d14 [file] [log] [blame]
Jan-Bernd Themann7a291082006-09-13 17:44:31 +02001/*
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
Al Virod7fe0f22006-12-03 23:15:30 -050029#include <linux/mm.h>
Jan-Bernd Themann7a291082006-09-13 17:44:31 +020030#include "ehea.h"
31#include "ehea_phyp.h"
32#include "ehea_qmr.h"
33
Thomas Klein44c82152007-07-11 16:32:00 +020034
35struct ehea_busmap ehea_bmap = { 0, 0, NULL };
Thomas Klein44c82152007-07-11 16:32:00 +020036
37
Jan-Bernd Themann7a291082006-09-13 17:44:31 +020038static 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
53static 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;
Doug Maxeyf67c6272008-01-31 20:20:51 -060066 queue->queue_pages = kmalloc(nr_of_pages * sizeof(void *), GFP_KERNEL);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +020067 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) {
Doug Maxeyf67c6272008-01-31 20:20:51 -060079 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +020080 if (!kpage)
81 goto out_nomem;
82 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
Doug Maxeyf67c6272008-01-31 20:20:51 -060083 (queue->queue_pages)[i] = (struct ehea_page *)kpage;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +020084 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;
95out_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
104static 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
120struct 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
200out_kill_hwq:
201 hw_queue_dtor(&cq->hw_queue);
202
203out_freeres:
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100204 ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200205
206out_freemem:
207 kfree(cq);
208
209out_nomem:
210 return NULL;
211}
212
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100213u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
214{
215 u64 hret;
216 u64 adapter_handle = cq->adapter->handle;
217
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200218 /* deregister all previous registered pages */
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100219 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
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200229int ehea_destroy_cq(struct ehea_cq *cq)
230{
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100231 u64 hret;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200232 if (!cq)
233 return 0;
234
Jan-Bernd Themann28721c82007-08-22 16:21:28 +0200235 hcp_epas_dtor(&cq->epas);
Doug Maxeyf67c6272008-01-31 20:20:51 -0600236 hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
237 if (hret == H_R_STATE) {
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100238 ehea_error_data(cq->adapter, cq->fw_handle);
239 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
240 }
Thomas Klein1b5135d2006-11-03 17:47:20 +0100241
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200242 if (hret != H_SUCCESS) {
243 ehea_error("destroy CQ failed");
244 return -EIO;
245 }
246
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200247 return 0;
248}
249
250struct 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);
Doug Maxeyf67c6272008-01-31 20:20:51 -0600302 if ((hret != H_SUCCESS) || (vpage))
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200303 goto out_kill_hwq;
Doug Maxeyf67c6272008-01-31 20:20:51 -0600304
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200305 } else {
Doug Maxeyf67c6272008-01-31 20:20:51 -0600306 if ((hret != H_PAGE_REGISTERED) || (!vpage))
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200307 goto out_kill_hwq;
Doug Maxeyf67c6272008-01-31 20:20:51 -0600308
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200309 }
310 }
311
312 hw_qeit_reset(&eq->hw_queue);
313 return eq;
314
315out_kill_hwq:
316 hw_queue_dtor(&eq->hw_queue);
317
318out_freeres:
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100319 ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200320
321out_freemem:
322 kfree(eq);
323 return NULL;
324}
325
326struct 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);
Doug Maxeyf67c6272008-01-31 20:20:51 -0600332 eqe = (struct ehea_eqe *)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200333 spin_unlock_irqrestore(&eq->spinlock, flags);
334
335 return eqe;
336}
337
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100338u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200339{
340 u64 hret;
341 unsigned long flags;
342
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200343 spin_lock_irqsave(&eq->spinlock, flags);
344
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100345 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200346 spin_unlock_irqrestore(&eq->spinlock, flags);
347
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100348 if (hret != H_SUCCESS)
349 return hret;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200350
351 hw_queue_dtor(&eq->hw_queue);
352 kfree(eq);
353
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100354 return hret;
355}
356
357int ehea_destroy_eq(struct ehea_eq *eq)
358{
359 u64 hret;
360 if (!eq)
361 return 0;
362
Jan-Bernd Themann28721c82007-08-22 16:21:28 +0200363 hcp_epas_dtor(&eq->epas);
364
Doug Maxeyf67c6272008-01-31 20:20:51 -0600365 hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
366 if (hret == H_R_STATE) {
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100367 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;
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200374 }
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100375
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200376 return 0;
377}
378
379/**
380 * allocates memory for a queue and registers pages in phyp
381 */
382int 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
412out_kill_hwq:
413 hw_queue_dtor(hw_queue);
414 return -EIO;
415}
416
417static inline u32 map_wqe_size(u8 wqe_enc_size)
418{
419 return 128 << wqe_enc_size;
420}
421
422struct 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
499out_kill_hwr2q:
500 hw_queue_dtor(&qp->hw_rqueue2);
501
502out_kill_hwr1q:
503 hw_queue_dtor(&qp->hw_rqueue1);
504
505out_kill_hwsq:
506 hw_queue_dtor(&qp->hw_squeue);
507
508out_freeres:
509 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100510 ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200511
512out_freemem:
513 kfree(qp);
514 return NULL;
515}
516
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100517u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200518{
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200519 u64 hret;
520 struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200521
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200522
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200523 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;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200527
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200528 hw_queue_dtor(&qp->hw_squeue);
529 hw_queue_dtor(&qp->hw_rqueue1);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200530
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200531 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);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200536
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200537 return hret;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200538}
539
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100540int ehea_destroy_qp(struct ehea_qp *qp)
541{
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200542 u64 hret;
543 if (!qp)
544 return 0;
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100545
Jan-Bernd Themann28721c82007-08-22 16:21:28 +0200546 hcp_epas_dtor(&qp->epas);
547
Doug Maxeyf67c6272008-01-31 20:20:51 -0600548 hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
549 if (hret == H_R_STATE) {
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200550 ehea_error_data(qp->adapter, qp->fw_handle);
551 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
552 }
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100553
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200554 if (hret != H_SUCCESS) {
555 ehea_error("destroy QP failed");
556 return -EIO;
557 }
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100558
Jan-Bernd Themannd1d25aa2007-07-02 13:00:46 +0200559 return 0;
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100560}
561
Doug Maxeyf67c6272008-01-31 20:20:51 -0600562int ehea_create_busmap(void)
Thomas Klein44c82152007-07-11 16:32:00 +0200563{
564 u64 vaddr = EHEA_BUSMAP_START;
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200565 unsigned long high_section_index = 0;
Thomas Klein44c82152007-07-11 16:32:00 +0200566 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++)
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200575 if (valid_section_nr(i))
576 high_section_index = i;
Thomas Klein44c82152007-07-11 16:32:00 +0200577
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200578 ehea_bmap.entries = high_section_index + 1;
Thomas Klein44c82152007-07-11 16:32:00 +0200579 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;
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200590 ehea_bmap.valid_sections++;
Thomas Klein44c82152007-07-11 16:32:00 +0200591 } else
592 ehea_bmap.vaddr[i] = 0;
593 }
594
595 return 0;
596}
597
Doug Maxeyf67c6272008-01-31 20:20:51 -0600598void ehea_destroy_busmap(void)
Thomas Klein44c82152007-07-11 16:32:00 +0200599{
600 vfree(ehea_bmap.vaddr);
601}
602
603u64 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))
Jan-Bernd Themann3bf76b82007-10-08 16:01:33 +0200620 schedule_work(&ehea_rereg_mr_task);
Thomas Klein44c82152007-07-11 16:32:00 +0200621
622 return mapped_addr;
623}
624
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100625int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200626{
Thomas Klein44c82152007-07-11 16:32:00 +0200627 int ret;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200628 u64 *pt;
Thomas Klein44c82152007-07-11 16:32:00 +0200629 void *pg;
630 u64 hret, pt_abs, i, j, m, mr_len;
631 u32 acc_ctrl = EHEA_MR_ACC_CTRL;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200632
Thomas Klein44c82152007-07-11 16:32:00 +0200633 mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200634
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200635 pt = kzalloc(PAGE_SIZE, GFP_KERNEL);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200636 if (!pt) {
637 ehea_error("no mem");
638 ret = -ENOMEM;
639 goto out;
640 }
641 pt_abs = virt_to_abs(pt);
642
Thomas Klein44c82152007-07-11 16:32:00 +0200643 hret = ehea_h_alloc_resource_mr(adapter->handle,
644 EHEA_BUSMAP_START, mr_len,
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200645 acc_ctrl, adapter->pd,
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100646 &mr->handle, &mr->lkey);
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200647 if (hret != H_SUCCESS) {
648 ehea_error("alloc_resource_mr failed");
649 ret = -EIO;
650 goto out;
651 }
652
Thomas Klein44c82152007-07-11 16:32:00 +0200653 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;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200657
Jan-Bernd Themann2c694482007-10-01 16:33:18 +0200658 for (j = 0; j < (EHEA_PAGES_PER_SECTION /
659 EHEA_MAX_RPAGE); j++) {
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200660
Thomas Klein44c82152007-07-11 16:32:00 +0200661 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
662 pg = sectbase + ((k++) * EHEA_PAGESIZE);
663 pt[m] = virt_to_abs(pg);
664 }
Thomas Kleina1d261c2006-11-03 17:48:23 +0100665
Thomas Klein44c82152007-07-11 16:32:00 +0200666 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 }
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200680 }
681
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200682 if (hret != H_SUCCESS) {
Thomas Klein44c82152007-07-11 16:32:00 +0200683 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
684 ehea_error("registering mr failed");
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200685 ret = -EIO;
686 goto out;
687 }
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100688
Thomas Klein44c82152007-07-11 16:32:00 +0200689 mr->vaddr = EHEA_BUSMAP_START;
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100690 mr->adapter = adapter;
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200691 ret = 0;
692out:
693 kfree(pt);
694 return ret;
695}
696
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100697int 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
714int 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
Jan-Bernd Themannd2db9ee2007-02-09 09:10:51 +0100730void 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];
Jan-Bernd Themann7a291082006-09-13 17:44:31 +0200735
Jan-Bernd Themannd2db9ee2007-02-09 09:10:51 +0100736 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
Jan-Bernd Themanne542aa62007-03-22 17:50:24 +0100745 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
Jan-Bernd Themannd2db9ee2007-02-09 09:10:51 +0100753 ehea_dump(data, length, "error data");
754}
755
756void 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}