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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / hw / ehca / ehca_mrmw.c
1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * MR/MW functions
5 *
6 * Authors: Dietmar Decker <ddecker@de.ibm.com>
7 * Christoph Raisch <raisch@de.ibm.com>
8 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
9 *
10 * Copyright (c) 2005 IBM Corporation
11 *
12 * All rights reserved.
13 *
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
15 * BSD.
16 *
17 * OpenIB BSD License
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 *
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
24 *
25 * Redistributions in binary form must reproduce the above copyright notice,
26 * this list of conditions and the following disclaimer in the documentation
27 * and/or other materials
28 * provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 #include <asm/current.h>
44
45 #include <rdma/ib_umem.h>
46
47 #include "ehca_iverbs.h"
48 #include "ehca_mrmw.h"
49 #include "hcp_if.h"
50 #include "hipz_hw.h"
51
52 #define NUM_CHUNKS(length, chunk_size) \
53 (((length) + (chunk_size - 1)) / (chunk_size))
54
55 /* max number of rpages (per hcall register_rpages) */
56 #define MAX_RPAGES 512
57
58 static struct kmem_cache *mr_cache;
59 static struct kmem_cache *mw_cache;
60
61 enum ehca_mr_pgsize {
62 EHCA_MR_PGSIZE4K = 0x1000L,
63 EHCA_MR_PGSIZE64K = 0x10000L,
64 EHCA_MR_PGSIZE1M = 0x100000L,
65 EHCA_MR_PGSIZE16M = 0x1000000L
66 };
67
68 #define EHCA_MR_PGSHIFT4K 12
69 #define EHCA_MR_PGSHIFT64K 16
70 #define EHCA_MR_PGSHIFT1M 20
71 #define EHCA_MR_PGSHIFT16M 24
72
73 static u32 ehca_encode_hwpage_size(u32 pgsize)
74 {
75 int log = ilog2(pgsize);
76 WARN_ON(log < 12 || log > 24 || log & 3);
77 return (log - 12) / 4;
78 }
79
80 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
81 {
82 return 1UL << ilog2(shca->hca_cap_mr_pgsize);
83 }
84
85 static struct ehca_mr *ehca_mr_new(void)
86 {
87 struct ehca_mr *me;
88
89 me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
90 if (me)
91 spin_lock_init(&me->mrlock);
92 else
93 ehca_gen_err("alloc failed");
94
95 return me;
96 }
97
98 static void ehca_mr_delete(struct ehca_mr *me)
99 {
100 kmem_cache_free(mr_cache, me);
101 }
102
103 static struct ehca_mw *ehca_mw_new(void)
104 {
105 struct ehca_mw *me;
106
107 me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
108 if (me)
109 spin_lock_init(&me->mwlock);
110 else
111 ehca_gen_err("alloc failed");
112
113 return me;
114 }
115
116 static void ehca_mw_delete(struct ehca_mw *me)
117 {
118 kmem_cache_free(mw_cache, me);
119 }
120
121 /*----------------------------------------------------------------------*/
122
123 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
124 {
125 struct ib_mr *ib_mr;
126 int ret;
127 struct ehca_mr *e_maxmr;
128 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
129 struct ehca_shca *shca =
130 container_of(pd->device, struct ehca_shca, ib_device);
131
132 if (shca->maxmr) {
133 e_maxmr = ehca_mr_new();
134 if (!e_maxmr) {
135 ehca_err(&shca->ib_device, "out of memory");
136 ib_mr = ERR_PTR(-ENOMEM);
137 goto get_dma_mr_exit0;
138 }
139
140 ret = ehca_reg_maxmr(shca, e_maxmr, (u64 *)KERNELBASE,
141 mr_access_flags, e_pd,
142 &e_maxmr->ib.ib_mr.lkey,
143 &e_maxmr->ib.ib_mr.rkey);
144 if (ret) {
145 ehca_mr_delete(e_maxmr);
146 ib_mr = ERR_PTR(ret);
147 goto get_dma_mr_exit0;
148 }
149 ib_mr = &e_maxmr->ib.ib_mr;
150 } else {
151 ehca_err(&shca->ib_device, "no internal max-MR exist!");
152 ib_mr = ERR_PTR(-EINVAL);
153 goto get_dma_mr_exit0;
154 }
155
156 get_dma_mr_exit0:
157 if (IS_ERR(ib_mr))
158 ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x",
159 PTR_ERR(ib_mr), pd, mr_access_flags);
160 return ib_mr;
161 } /* end ehca_get_dma_mr() */
162
163 /*----------------------------------------------------------------------*/
164
165 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
166 struct ib_phys_buf *phys_buf_array,
167 int num_phys_buf,
168 int mr_access_flags,
169 u64 *iova_start)
170 {
171 struct ib_mr *ib_mr;
172 int ret;
173 struct ehca_mr *e_mr;
174 struct ehca_shca *shca =
175 container_of(pd->device, struct ehca_shca, ib_device);
176 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
177
178 u64 size;
179
180 if ((num_phys_buf <= 0) || !phys_buf_array) {
181 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
182 "phys_buf_array=%p", num_phys_buf, phys_buf_array);
183 ib_mr = ERR_PTR(-EINVAL);
184 goto reg_phys_mr_exit0;
185 }
186 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
187 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
188 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
189 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
190 /*
191 * Remote Write Access requires Local Write Access
192 * Remote Atomic Access requires Local Write Access
193 */
194 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
195 mr_access_flags);
196 ib_mr = ERR_PTR(-EINVAL);
197 goto reg_phys_mr_exit0;
198 }
199
200 /* check physical buffer list and calculate size */
201 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
202 iova_start, &size);
203 if (ret) {
204 ib_mr = ERR_PTR(ret);
205 goto reg_phys_mr_exit0;
206 }
207 if ((size == 0) ||
208 (((u64)iova_start + size) < (u64)iova_start)) {
209 ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
210 size, iova_start);
211 ib_mr = ERR_PTR(-EINVAL);
212 goto reg_phys_mr_exit0;
213 }
214
215 e_mr = ehca_mr_new();
216 if (!e_mr) {
217 ehca_err(pd->device, "out of memory");
218 ib_mr = ERR_PTR(-ENOMEM);
219 goto reg_phys_mr_exit0;
220 }
221
222 /* register MR on HCA */
223 if (ehca_mr_is_maxmr(size, iova_start)) {
224 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
225 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
226 e_pd, &e_mr->ib.ib_mr.lkey,
227 &e_mr->ib.ib_mr.rkey);
228 if (ret) {
229 ib_mr = ERR_PTR(ret);
230 goto reg_phys_mr_exit1;
231 }
232 } else {
233 struct ehca_mr_pginfo pginfo;
234 u32 num_kpages;
235 u32 num_hwpages;
236 u64 hw_pgsize;
237
238 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
239 PAGE_SIZE);
240 /* for kernel space we try most possible pgsize */
241 hw_pgsize = ehca_get_max_hwpage_size(shca);
242 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
243 hw_pgsize);
244 memset(&pginfo, 0, sizeof(pginfo));
245 pginfo.type = EHCA_MR_PGI_PHYS;
246 pginfo.num_kpages = num_kpages;
247 pginfo.hwpage_size = hw_pgsize;
248 pginfo.num_hwpages = num_hwpages;
249 pginfo.u.phy.num_phys_buf = num_phys_buf;
250 pginfo.u.phy.phys_buf_array = phys_buf_array;
251 pginfo.next_hwpage =
252 ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
253
254 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
255 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
256 &e_mr->ib.ib_mr.rkey);
257 if (ret) {
258 ib_mr = ERR_PTR(ret);
259 goto reg_phys_mr_exit1;
260 }
261 }
262
263 /* successful registration of all pages */
264 return &e_mr->ib.ib_mr;
265
266 reg_phys_mr_exit1:
267 ehca_mr_delete(e_mr);
268 reg_phys_mr_exit0:
269 if (IS_ERR(ib_mr))
270 ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p "
271 "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
272 PTR_ERR(ib_mr), pd, phys_buf_array,
273 num_phys_buf, mr_access_flags, iova_start);
274 return ib_mr;
275 } /* end ehca_reg_phys_mr() */
276
277 /*----------------------------------------------------------------------*/
278
279 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
280 u64 virt, int mr_access_flags,
281 struct ib_udata *udata)
282 {
283 struct ib_mr *ib_mr;
284 struct ehca_mr *e_mr;
285 struct ehca_shca *shca =
286 container_of(pd->device, struct ehca_shca, ib_device);
287 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
288 struct ehca_mr_pginfo pginfo;
289 int ret, page_shift;
290 u32 num_kpages;
291 u32 num_hwpages;
292 u64 hwpage_size;
293
294 if (!pd) {
295 ehca_gen_err("bad pd=%p", pd);
296 return ERR_PTR(-EFAULT);
297 }
298
299 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
300 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
301 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
302 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
303 /*
304 * Remote Write Access requires Local Write Access
305 * Remote Atomic Access requires Local Write Access
306 */
307 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
308 mr_access_flags);
309 ib_mr = ERR_PTR(-EINVAL);
310 goto reg_user_mr_exit0;
311 }
312
313 if (length == 0 || virt + length < virt) {
314 ehca_err(pd->device, "bad input values: length=%lx "
315 "virt_base=%lx", length, virt);
316 ib_mr = ERR_PTR(-EINVAL);
317 goto reg_user_mr_exit0;
318 }
319
320 e_mr = ehca_mr_new();
321 if (!e_mr) {
322 ehca_err(pd->device, "out of memory");
323 ib_mr = ERR_PTR(-ENOMEM);
324 goto reg_user_mr_exit0;
325 }
326
327 e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
328 mr_access_flags);
329 if (IS_ERR(e_mr->umem)) {
330 ib_mr = (void *)e_mr->umem;
331 goto reg_user_mr_exit1;
332 }
333
334 if (e_mr->umem->page_size != PAGE_SIZE) {
335 ehca_err(pd->device, "page size not supported, "
336 "e_mr->umem->page_size=%x", e_mr->umem->page_size);
337 ib_mr = ERR_PTR(-EINVAL);
338 goto reg_user_mr_exit2;
339 }
340
341 /* determine number of MR pages */
342 num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
343 /* select proper hw_pgsize */
344 page_shift = PAGE_SHIFT;
345 if (e_mr->umem->hugetlb) {
346 /* determine page_shift, clamp between 4K and 16M */
347 page_shift = (fls64(length - 1) + 3) & ~3;
348 page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
349 EHCA_MR_PGSHIFT16M);
350 }
351 hwpage_size = 1UL << page_shift;
352
353 /* now that we have the desired page size, shift until it's
354 * supported, too. 4K is always supported, so this terminates.
355 */
356 while (!(hwpage_size & shca->hca_cap_mr_pgsize))
357 hwpage_size >>= 4;
358
359 reg_user_mr_fallback:
360 num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
361 /* register MR on HCA */
362 memset(&pginfo, 0, sizeof(pginfo));
363 pginfo.type = EHCA_MR_PGI_USER;
364 pginfo.hwpage_size = hwpage_size;
365 pginfo.num_kpages = num_kpages;
366 pginfo.num_hwpages = num_hwpages;
367 pginfo.u.usr.region = e_mr->umem;
368 pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
369 pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
370 (&e_mr->umem->chunk_list),
371 list);
372
373 ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
374 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
375 &e_mr->ib.ib_mr.rkey);
376 if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
377 ehca_warn(pd->device, "failed to register mr "
378 "with hwpage_size=%lx", hwpage_size);
379 ehca_info(pd->device, "try to register mr with "
380 "kpage_size=%lx", PAGE_SIZE);
381 /*
382 * this means kpages are not contiguous for a hw page
383 * try kernel page size as fallback solution
384 */
385 hwpage_size = PAGE_SIZE;
386 goto reg_user_mr_fallback;
387 }
388 if (ret) {
389 ib_mr = ERR_PTR(ret);
390 goto reg_user_mr_exit2;
391 }
392
393 /* successful registration of all pages */
394 return &e_mr->ib.ib_mr;
395
396 reg_user_mr_exit2:
397 ib_umem_release(e_mr->umem);
398 reg_user_mr_exit1:
399 ehca_mr_delete(e_mr);
400 reg_user_mr_exit0:
401 if (IS_ERR(ib_mr))
402 ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p",
403 PTR_ERR(ib_mr), pd, mr_access_flags, udata);
404 return ib_mr;
405 } /* end ehca_reg_user_mr() */
406
407 /*----------------------------------------------------------------------*/
408
409 int ehca_rereg_phys_mr(struct ib_mr *mr,
410 int mr_rereg_mask,
411 struct ib_pd *pd,
412 struct ib_phys_buf *phys_buf_array,
413 int num_phys_buf,
414 int mr_access_flags,
415 u64 *iova_start)
416 {
417 int ret;
418
419 struct ehca_shca *shca =
420 container_of(mr->device, struct ehca_shca, ib_device);
421 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
422 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
423 u64 new_size;
424 u64 *new_start;
425 u32 new_acl;
426 struct ehca_pd *new_pd;
427 u32 tmp_lkey, tmp_rkey;
428 unsigned long sl_flags;
429 u32 num_kpages = 0;
430 u32 num_hwpages = 0;
431 struct ehca_mr_pginfo pginfo;
432 u32 cur_pid = current->tgid;
433
434 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
435 (my_pd->ownpid != cur_pid)) {
436 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
437 cur_pid, my_pd->ownpid);
438 ret = -EINVAL;
439 goto rereg_phys_mr_exit0;
440 }
441
442 if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
443 /* TODO not supported, because PHYP rereg hCall needs pages */
444 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
445 "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
446 ret = -EINVAL;
447 goto rereg_phys_mr_exit0;
448 }
449
450 if (mr_rereg_mask & IB_MR_REREG_PD) {
451 if (!pd) {
452 ehca_err(mr->device, "rereg with bad pd, pd=%p "
453 "mr_rereg_mask=%x", pd, mr_rereg_mask);
454 ret = -EINVAL;
455 goto rereg_phys_mr_exit0;
456 }
457 }
458
459 if ((mr_rereg_mask &
460 ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
461 (mr_rereg_mask == 0)) {
462 ret = -EINVAL;
463 goto rereg_phys_mr_exit0;
464 }
465
466 /* check other parameters */
467 if (e_mr == shca->maxmr) {
468 /* should be impossible, however reject to be sure */
469 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
470 "shca->maxmr=%p mr->lkey=%x",
471 mr, shca->maxmr, mr->lkey);
472 ret = -EINVAL;
473 goto rereg_phys_mr_exit0;
474 }
475 if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
476 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
477 ehca_err(mr->device, "not supported for FMR, mr=%p "
478 "flags=%x", mr, e_mr->flags);
479 ret = -EINVAL;
480 goto rereg_phys_mr_exit0;
481 }
482 if (!phys_buf_array || num_phys_buf <= 0) {
483 ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
484 " phys_buf_array=%p num_phys_buf=%x",
485 mr_rereg_mask, phys_buf_array, num_phys_buf);
486 ret = -EINVAL;
487 goto rereg_phys_mr_exit0;
488 }
489 }
490 if ((mr_rereg_mask & IB_MR_REREG_ACCESS) && /* change ACL */
491 (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
492 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
493 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
494 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
495 /*
496 * Remote Write Access requires Local Write Access
497 * Remote Atomic Access requires Local Write Access
498 */
499 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
500 "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
501 ret = -EINVAL;
502 goto rereg_phys_mr_exit0;
503 }
504
505 /* set requested values dependent on rereg request */
506 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
507 new_start = e_mr->start;
508 new_size = e_mr->size;
509 new_acl = e_mr->acl;
510 new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
511
512 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
513 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
514
515 new_start = iova_start; /* change address */
516 /* check physical buffer list and calculate size */
517 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
518 num_phys_buf, iova_start,
519 &new_size);
520 if (ret)
521 goto rereg_phys_mr_exit1;
522 if ((new_size == 0) ||
523 (((u64)iova_start + new_size) < (u64)iova_start)) {
524 ehca_err(mr->device, "bad input values: new_size=%lx "
525 "iova_start=%p", new_size, iova_start);
526 ret = -EINVAL;
527 goto rereg_phys_mr_exit1;
528 }
529 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
530 new_size, PAGE_SIZE);
531 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
532 new_size, hw_pgsize);
533 memset(&pginfo, 0, sizeof(pginfo));
534 pginfo.type = EHCA_MR_PGI_PHYS;
535 pginfo.num_kpages = num_kpages;
536 pginfo.hwpage_size = hw_pgsize;
537 pginfo.num_hwpages = num_hwpages;
538 pginfo.u.phy.num_phys_buf = num_phys_buf;
539 pginfo.u.phy.phys_buf_array = phys_buf_array;
540 pginfo.next_hwpage =
541 ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
542 }
543 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
544 new_acl = mr_access_flags;
545 if (mr_rereg_mask & IB_MR_REREG_PD)
546 new_pd = container_of(pd, struct ehca_pd, ib_pd);
547
548 ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
549 new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
550 if (ret)
551 goto rereg_phys_mr_exit1;
552
553 /* successful reregistration */
554 if (mr_rereg_mask & IB_MR_REREG_PD)
555 mr->pd = pd;
556 mr->lkey = tmp_lkey;
557 mr->rkey = tmp_rkey;
558
559 rereg_phys_mr_exit1:
560 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
561 rereg_phys_mr_exit0:
562 if (ret)
563 ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p "
564 "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
565 "iova_start=%p",
566 ret, mr, mr_rereg_mask, pd, phys_buf_array,
567 num_phys_buf, mr_access_flags, iova_start);
568 return ret;
569 } /* end ehca_rereg_phys_mr() */
570
571 /*----------------------------------------------------------------------*/
572
573 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
574 {
575 int ret = 0;
576 u64 h_ret;
577 struct ehca_shca *shca =
578 container_of(mr->device, struct ehca_shca, ib_device);
579 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
580 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
581 u32 cur_pid = current->tgid;
582 unsigned long sl_flags;
583 struct ehca_mr_hipzout_parms hipzout;
584
585 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
586 (my_pd->ownpid != cur_pid)) {
587 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
588 cur_pid, my_pd->ownpid);
589 ret = -EINVAL;
590 goto query_mr_exit0;
591 }
592
593 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
594 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
595 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
596 ret = -EINVAL;
597 goto query_mr_exit0;
598 }
599
600 memset(mr_attr, 0, sizeof(struct ib_mr_attr));
601 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
602
603 h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
604 if (h_ret != H_SUCCESS) {
605 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%li mr=%p "
606 "hca_hndl=%lx mr_hndl=%lx lkey=%x",
607 h_ret, mr, shca->ipz_hca_handle.handle,
608 e_mr->ipz_mr_handle.handle, mr->lkey);
609 ret = ehca2ib_return_code(h_ret);
610 goto query_mr_exit1;
611 }
612 mr_attr->pd = mr->pd;
613 mr_attr->device_virt_addr = hipzout.vaddr;
614 mr_attr->size = hipzout.len;
615 mr_attr->lkey = hipzout.lkey;
616 mr_attr->rkey = hipzout.rkey;
617 ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
618
619 query_mr_exit1:
620 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
621 query_mr_exit0:
622 if (ret)
623 ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p",
624 ret, mr, mr_attr);
625 return ret;
626 } /* end ehca_query_mr() */
627
628 /*----------------------------------------------------------------------*/
629
630 int ehca_dereg_mr(struct ib_mr *mr)
631 {
632 int ret = 0;
633 u64 h_ret;
634 struct ehca_shca *shca =
635 container_of(mr->device, struct ehca_shca, ib_device);
636 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
637 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
638 u32 cur_pid = current->tgid;
639
640 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
641 (my_pd->ownpid != cur_pid)) {
642 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
643 cur_pid, my_pd->ownpid);
644 ret = -EINVAL;
645 goto dereg_mr_exit0;
646 }
647
648 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
649 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
650 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
651 ret = -EINVAL;
652 goto dereg_mr_exit0;
653 } else if (e_mr == shca->maxmr) {
654 /* should be impossible, however reject to be sure */
655 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
656 "shca->maxmr=%p mr->lkey=%x",
657 mr, shca->maxmr, mr->lkey);
658 ret = -EINVAL;
659 goto dereg_mr_exit0;
660 }
661
662 /* TODO: BUSY: MR still has bound window(s) */
663 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
664 if (h_ret != H_SUCCESS) {
665 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%li shca=%p "
666 "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
667 h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
668 e_mr->ipz_mr_handle.handle, mr->lkey);
669 ret = ehca2ib_return_code(h_ret);
670 goto dereg_mr_exit0;
671 }
672
673 if (e_mr->umem)
674 ib_umem_release(e_mr->umem);
675
676 /* successful deregistration */
677 ehca_mr_delete(e_mr);
678
679 dereg_mr_exit0:
680 if (ret)
681 ehca_err(mr->device, "ret=%i mr=%p", ret, mr);
682 return ret;
683 } /* end ehca_dereg_mr() */
684
685 /*----------------------------------------------------------------------*/
686
687 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
688 {
689 struct ib_mw *ib_mw;
690 u64 h_ret;
691 struct ehca_mw *e_mw;
692 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
693 struct ehca_shca *shca =
694 container_of(pd->device, struct ehca_shca, ib_device);
695 struct ehca_mw_hipzout_parms hipzout;
696
697 e_mw = ehca_mw_new();
698 if (!e_mw) {
699 ib_mw = ERR_PTR(-ENOMEM);
700 goto alloc_mw_exit0;
701 }
702
703 h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
704 e_pd->fw_pd, &hipzout);
705 if (h_ret != H_SUCCESS) {
706 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%li "
707 "shca=%p hca_hndl=%lx mw=%p",
708 h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
709 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
710 goto alloc_mw_exit1;
711 }
712 /* successful MW allocation */
713 e_mw->ipz_mw_handle = hipzout.handle;
714 e_mw->ib_mw.rkey = hipzout.rkey;
715 return &e_mw->ib_mw;
716
717 alloc_mw_exit1:
718 ehca_mw_delete(e_mw);
719 alloc_mw_exit0:
720 if (IS_ERR(ib_mw))
721 ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd);
722 return ib_mw;
723 } /* end ehca_alloc_mw() */
724
725 /*----------------------------------------------------------------------*/
726
727 int ehca_bind_mw(struct ib_qp *qp,
728 struct ib_mw *mw,
729 struct ib_mw_bind *mw_bind)
730 {
731 /* TODO: not supported up to now */
732 ehca_gen_err("bind MW currently not supported by HCAD");
733
734 return -EPERM;
735 } /* end ehca_bind_mw() */
736
737 /*----------------------------------------------------------------------*/
738
739 int ehca_dealloc_mw(struct ib_mw *mw)
740 {
741 u64 h_ret;
742 struct ehca_shca *shca =
743 container_of(mw->device, struct ehca_shca, ib_device);
744 struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
745
746 h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
747 if (h_ret != H_SUCCESS) {
748 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%li shca=%p "
749 "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
750 h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
751 e_mw->ipz_mw_handle.handle);
752 return ehca2ib_return_code(h_ret);
753 }
754 /* successful deallocation */
755 ehca_mw_delete(e_mw);
756 return 0;
757 } /* end ehca_dealloc_mw() */
758
759 /*----------------------------------------------------------------------*/
760
761 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
762 int mr_access_flags,
763 struct ib_fmr_attr *fmr_attr)
764 {
765 struct ib_fmr *ib_fmr;
766 struct ehca_shca *shca =
767 container_of(pd->device, struct ehca_shca, ib_device);
768 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
769 struct ehca_mr *e_fmr;
770 int ret;
771 u32 tmp_lkey, tmp_rkey;
772 struct ehca_mr_pginfo pginfo;
773 u64 hw_pgsize;
774
775 /* check other parameters */
776 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
777 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
778 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
779 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
780 /*
781 * Remote Write Access requires Local Write Access
782 * Remote Atomic Access requires Local Write Access
783 */
784 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
785 mr_access_flags);
786 ib_fmr = ERR_PTR(-EINVAL);
787 goto alloc_fmr_exit0;
788 }
789 if (mr_access_flags & IB_ACCESS_MW_BIND) {
790 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
791 mr_access_flags);
792 ib_fmr = ERR_PTR(-EINVAL);
793 goto alloc_fmr_exit0;
794 }
795 if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
796 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
797 "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
798 fmr_attr->max_pages, fmr_attr->max_maps,
799 fmr_attr->page_shift);
800 ib_fmr = ERR_PTR(-EINVAL);
801 goto alloc_fmr_exit0;
802 }
803
804 hw_pgsize = 1 << fmr_attr->page_shift;
805 if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) {
806 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
807 fmr_attr->page_shift);
808 ib_fmr = ERR_PTR(-EINVAL);
809 goto alloc_fmr_exit0;
810 }
811
812 e_fmr = ehca_mr_new();
813 if (!e_fmr) {
814 ib_fmr = ERR_PTR(-ENOMEM);
815 goto alloc_fmr_exit0;
816 }
817 e_fmr->flags |= EHCA_MR_FLAG_FMR;
818
819 /* register MR on HCA */
820 memset(&pginfo, 0, sizeof(pginfo));
821 pginfo.hwpage_size = hw_pgsize;
822 /*
823 * pginfo.num_hwpages==0, ie register_rpages() will not be called
824 * but deferred to map_phys_fmr()
825 */
826 ret = ehca_reg_mr(shca, e_fmr, NULL,
827 fmr_attr->max_pages * (1 << fmr_attr->page_shift),
828 mr_access_flags, e_pd, &pginfo,
829 &tmp_lkey, &tmp_rkey);
830 if (ret) {
831 ib_fmr = ERR_PTR(ret);
832 goto alloc_fmr_exit1;
833 }
834
835 /* successful */
836 e_fmr->hwpage_size = hw_pgsize;
837 e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
838 e_fmr->fmr_max_pages = fmr_attr->max_pages;
839 e_fmr->fmr_max_maps = fmr_attr->max_maps;
840 e_fmr->fmr_map_cnt = 0;
841 return &e_fmr->ib.ib_fmr;
842
843 alloc_fmr_exit1:
844 ehca_mr_delete(e_fmr);
845 alloc_fmr_exit0:
846 return ib_fmr;
847 } /* end ehca_alloc_fmr() */
848
849 /*----------------------------------------------------------------------*/
850
851 int ehca_map_phys_fmr(struct ib_fmr *fmr,
852 u64 *page_list,
853 int list_len,
854 u64 iova)
855 {
856 int ret;
857 struct ehca_shca *shca =
858 container_of(fmr->device, struct ehca_shca, ib_device);
859 struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
860 struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
861 struct ehca_mr_pginfo pginfo;
862 u32 tmp_lkey, tmp_rkey;
863
864 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
865 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
866 e_fmr, e_fmr->flags);
867 ret = -EINVAL;
868 goto map_phys_fmr_exit0;
869 }
870 ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
871 if (ret)
872 goto map_phys_fmr_exit0;
873 if (iova % e_fmr->fmr_page_size) {
874 /* only whole-numbered pages */
875 ehca_err(fmr->device, "bad iova, iova=%lx fmr_page_size=%x",
876 iova, e_fmr->fmr_page_size);
877 ret = -EINVAL;
878 goto map_phys_fmr_exit0;
879 }
880 if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
881 /* HCAD does not limit the maps, however trace this anyway */
882 ehca_info(fmr->device, "map limit exceeded, fmr=%p "
883 "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
884 fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
885 }
886
887 memset(&pginfo, 0, sizeof(pginfo));
888 pginfo.type = EHCA_MR_PGI_FMR;
889 pginfo.num_kpages = list_len;
890 pginfo.hwpage_size = e_fmr->hwpage_size;
891 pginfo.num_hwpages =
892 list_len * e_fmr->fmr_page_size / pginfo.hwpage_size;
893 pginfo.u.fmr.page_list = page_list;
894 pginfo.next_hwpage =
895 (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size;
896 pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size;
897
898 ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova,
899 list_len * e_fmr->fmr_page_size,
900 e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
901 if (ret)
902 goto map_phys_fmr_exit0;
903
904 /* successful reregistration */
905 e_fmr->fmr_map_cnt++;
906 e_fmr->ib.ib_fmr.lkey = tmp_lkey;
907 e_fmr->ib.ib_fmr.rkey = tmp_rkey;
908 return 0;
909
910 map_phys_fmr_exit0:
911 if (ret)
912 ehca_err(fmr->device, "ret=%i fmr=%p page_list=%p list_len=%x "
913 "iova=%lx", ret, fmr, page_list, list_len, iova);
914 return ret;
915 } /* end ehca_map_phys_fmr() */
916
917 /*----------------------------------------------------------------------*/
918
919 int ehca_unmap_fmr(struct list_head *fmr_list)
920 {
921 int ret = 0;
922 struct ib_fmr *ib_fmr;
923 struct ehca_shca *shca = NULL;
924 struct ehca_shca *prev_shca;
925 struct ehca_mr *e_fmr;
926 u32 num_fmr = 0;
927 u32 unmap_fmr_cnt = 0;
928
929 /* check all FMR belong to same SHCA, and check internal flag */
930 list_for_each_entry(ib_fmr, fmr_list, list) {
931 prev_shca = shca;
932 if (!ib_fmr) {
933 ehca_gen_err("bad fmr=%p in list", ib_fmr);
934 ret = -EINVAL;
935 goto unmap_fmr_exit0;
936 }
937 shca = container_of(ib_fmr->device, struct ehca_shca,
938 ib_device);
939 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
940 if ((shca != prev_shca) && prev_shca) {
941 ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
942 "prev_shca=%p e_fmr=%p",
943 shca, prev_shca, e_fmr);
944 ret = -EINVAL;
945 goto unmap_fmr_exit0;
946 }
947 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
948 ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
949 "e_fmr->flags=%x", e_fmr, e_fmr->flags);
950 ret = -EINVAL;
951 goto unmap_fmr_exit0;
952 }
953 num_fmr++;
954 }
955
956 /* loop over all FMRs to unmap */
957 list_for_each_entry(ib_fmr, fmr_list, list) {
958 unmap_fmr_cnt++;
959 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
960 shca = container_of(ib_fmr->device, struct ehca_shca,
961 ib_device);
962 ret = ehca_unmap_one_fmr(shca, e_fmr);
963 if (ret) {
964 /* unmap failed, stop unmapping of rest of FMRs */
965 ehca_err(&shca->ib_device, "unmap of one FMR failed, "
966 "stop rest, e_fmr=%p num_fmr=%x "
967 "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
968 unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
969 goto unmap_fmr_exit0;
970 }
971 }
972
973 unmap_fmr_exit0:
974 if (ret)
975 ehca_gen_err("ret=%i fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
976 ret, fmr_list, num_fmr, unmap_fmr_cnt);
977 return ret;
978 } /* end ehca_unmap_fmr() */
979
980 /*----------------------------------------------------------------------*/
981
982 int ehca_dealloc_fmr(struct ib_fmr *fmr)
983 {
984 int ret;
985 u64 h_ret;
986 struct ehca_shca *shca =
987 container_of(fmr->device, struct ehca_shca, ib_device);
988 struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
989
990 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
991 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
992 e_fmr, e_fmr->flags);
993 ret = -EINVAL;
994 goto free_fmr_exit0;
995 }
996
997 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
998 if (h_ret != H_SUCCESS) {
999 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%li e_fmr=%p "
1000 "hca_hndl=%lx fmr_hndl=%lx fmr->lkey=%x",
1001 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1002 e_fmr->ipz_mr_handle.handle, fmr->lkey);
1003 ret = ehca2ib_return_code(h_ret);
1004 goto free_fmr_exit0;
1005 }
1006 /* successful deregistration */
1007 ehca_mr_delete(e_fmr);
1008 return 0;
1009
1010 free_fmr_exit0:
1011 if (ret)
1012 ehca_err(&shca->ib_device, "ret=%i fmr=%p", ret, fmr);
1013 return ret;
1014 } /* end ehca_dealloc_fmr() */
1015
1016 /*----------------------------------------------------------------------*/
1017
1018 int ehca_reg_mr(struct ehca_shca *shca,
1019 struct ehca_mr *e_mr,
1020 u64 *iova_start,
1021 u64 size,
1022 int acl,
1023 struct ehca_pd *e_pd,
1024 struct ehca_mr_pginfo *pginfo,
1025 u32 *lkey, /*OUT*/
1026 u32 *rkey) /*OUT*/
1027 {
1028 int ret;
1029 u64 h_ret;
1030 u32 hipz_acl;
1031 struct ehca_mr_hipzout_parms hipzout;
1032
1033 ehca_mrmw_map_acl(acl, &hipz_acl);
1034 ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1035 if (ehca_use_hp_mr == 1)
1036 hipz_acl |= 0x00000001;
1037
1038 h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
1039 (u64)iova_start, size, hipz_acl,
1040 e_pd->fw_pd, &hipzout);
1041 if (h_ret != H_SUCCESS) {
1042 ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%li "
1043 "hca_hndl=%lx", h_ret, shca->ipz_hca_handle.handle);
1044 ret = ehca2ib_return_code(h_ret);
1045 goto ehca_reg_mr_exit0;
1046 }
1047
1048 e_mr->ipz_mr_handle = hipzout.handle;
1049
1050 ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1051 if (ret)
1052 goto ehca_reg_mr_exit1;
1053
1054 /* successful registration */
1055 e_mr->num_kpages = pginfo->num_kpages;
1056 e_mr->num_hwpages = pginfo->num_hwpages;
1057 e_mr->hwpage_size = pginfo->hwpage_size;
1058 e_mr->start = iova_start;
1059 e_mr->size = size;
1060 e_mr->acl = acl;
1061 *lkey = hipzout.lkey;
1062 *rkey = hipzout.rkey;
1063 return 0;
1064
1065 ehca_reg_mr_exit1:
1066 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1067 if (h_ret != H_SUCCESS) {
1068 ehca_err(&shca->ib_device, "h_ret=%li shca=%p e_mr=%p "
1069 "iova_start=%p size=%lx acl=%x e_pd=%p lkey=%x "
1070 "pginfo=%p num_kpages=%lx num_hwpages=%lx ret=%i",
1071 h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1072 hipzout.lkey, pginfo, pginfo->num_kpages,
1073 pginfo->num_hwpages, ret);
1074 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1075 "not recoverable");
1076 }
1077 ehca_reg_mr_exit0:
1078 if (ret)
1079 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1080 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1081 "num_kpages=%lx num_hwpages=%lx",
1082 ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1083 pginfo->num_kpages, pginfo->num_hwpages);
1084 return ret;
1085 } /* end ehca_reg_mr() */
1086
1087 /*----------------------------------------------------------------------*/
1088
1089 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1090 struct ehca_mr *e_mr,
1091 struct ehca_mr_pginfo *pginfo)
1092 {
1093 int ret = 0;
1094 u64 h_ret;
1095 u32 rnum;
1096 u64 rpage;
1097 u32 i;
1098 u64 *kpage;
1099
1100 if (!pginfo->num_hwpages) /* in case of fmr */
1101 return 0;
1102
1103 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1104 if (!kpage) {
1105 ehca_err(&shca->ib_device, "kpage alloc failed");
1106 ret = -ENOMEM;
1107 goto ehca_reg_mr_rpages_exit0;
1108 }
1109
1110 /* max MAX_RPAGES ehca mr pages per register call */
1111 for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1112
1113 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1114 rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1115 if (rnum == 0)
1116 rnum = MAX_RPAGES; /* last shot is full */
1117 } else
1118 rnum = MAX_RPAGES;
1119
1120 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1121 if (ret) {
1122 ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1123 "bad rc, ret=%i rnum=%x kpage=%p",
1124 ret, rnum, kpage);
1125 goto ehca_reg_mr_rpages_exit1;
1126 }
1127
1128 if (rnum > 1) {
1129 rpage = virt_to_abs(kpage);
1130 if (!rpage) {
1131 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1132 kpage, i);
1133 ret = -EFAULT;
1134 goto ehca_reg_mr_rpages_exit1;
1135 }
1136 } else
1137 rpage = *kpage;
1138
1139 h_ret = hipz_h_register_rpage_mr(
1140 shca->ipz_hca_handle, e_mr,
1141 ehca_encode_hwpage_size(pginfo->hwpage_size),
1142 0, rpage, rnum);
1143
1144 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1145 /*
1146 * check for 'registration complete'==H_SUCCESS
1147 * and for 'page registered'==H_PAGE_REGISTERED
1148 */
1149 if (h_ret != H_SUCCESS) {
1150 ehca_err(&shca->ib_device, "last "
1151 "hipz_reg_rpage_mr failed, h_ret=%li "
1152 "e_mr=%p i=%x hca_hndl=%lx mr_hndl=%lx"
1153 " lkey=%x", h_ret, e_mr, i,
1154 shca->ipz_hca_handle.handle,
1155 e_mr->ipz_mr_handle.handle,
1156 e_mr->ib.ib_mr.lkey);
1157 ret = ehca2ib_return_code(h_ret);
1158 break;
1159 } else
1160 ret = 0;
1161 } else if (h_ret != H_PAGE_REGISTERED) {
1162 ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1163 "h_ret=%li e_mr=%p i=%x lkey=%x hca_hndl=%lx "
1164 "mr_hndl=%lx", h_ret, e_mr, i,
1165 e_mr->ib.ib_mr.lkey,
1166 shca->ipz_hca_handle.handle,
1167 e_mr->ipz_mr_handle.handle);
1168 ret = ehca2ib_return_code(h_ret);
1169 break;
1170 } else
1171 ret = 0;
1172 } /* end for(i) */
1173
1174
1175 ehca_reg_mr_rpages_exit1:
1176 ehca_free_fw_ctrlblock(kpage);
1177 ehca_reg_mr_rpages_exit0:
1178 if (ret)
1179 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p pginfo=%p "
1180 "num_kpages=%lx num_hwpages=%lx", ret, shca, e_mr,
1181 pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1182 return ret;
1183 } /* end ehca_reg_mr_rpages() */
1184
1185 /*----------------------------------------------------------------------*/
1186
1187 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1188 struct ehca_mr *e_mr,
1189 u64 *iova_start,
1190 u64 size,
1191 u32 acl,
1192 struct ehca_pd *e_pd,
1193 struct ehca_mr_pginfo *pginfo,
1194 u32 *lkey, /*OUT*/
1195 u32 *rkey) /*OUT*/
1196 {
1197 int ret;
1198 u64 h_ret;
1199 u32 hipz_acl;
1200 u64 *kpage;
1201 u64 rpage;
1202 struct ehca_mr_pginfo pginfo_save;
1203 struct ehca_mr_hipzout_parms hipzout;
1204
1205 ehca_mrmw_map_acl(acl, &hipz_acl);
1206 ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1207
1208 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1209 if (!kpage) {
1210 ehca_err(&shca->ib_device, "kpage alloc failed");
1211 ret = -ENOMEM;
1212 goto ehca_rereg_mr_rereg1_exit0;
1213 }
1214
1215 pginfo_save = *pginfo;
1216 ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1217 if (ret) {
1218 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1219 "pginfo=%p type=%x num_kpages=%lx num_hwpages=%lx "
1220 "kpage=%p", e_mr, pginfo, pginfo->type,
1221 pginfo->num_kpages, pginfo->num_hwpages, kpage);
1222 goto ehca_rereg_mr_rereg1_exit1;
1223 }
1224 rpage = virt_to_abs(kpage);
1225 if (!rpage) {
1226 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1227 ret = -EFAULT;
1228 goto ehca_rereg_mr_rereg1_exit1;
1229 }
1230 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1231 (u64)iova_start, size, hipz_acl,
1232 e_pd->fw_pd, rpage, &hipzout);
1233 if (h_ret != H_SUCCESS) {
1234 /*
1235 * reregistration unsuccessful, try it again with the 3 hCalls,
1236 * e.g. this is required in case H_MR_CONDITION
1237 * (MW bound or MR is shared)
1238 */
1239 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1240 "(Rereg1), h_ret=%li e_mr=%p", h_ret, e_mr);
1241 *pginfo = pginfo_save;
1242 ret = -EAGAIN;
1243 } else if ((u64 *)hipzout.vaddr != iova_start) {
1244 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1245 "rereg_pmr, iova_start=%p iova_start_out=%lx e_mr=%p "
1246 "mr_handle=%lx lkey=%x lkey_out=%x", iova_start,
1247 hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1248 e_mr->ib.ib_mr.lkey, hipzout.lkey);
1249 ret = -EFAULT;
1250 } else {
1251 /*
1252 * successful reregistration
1253 * note: start and start_out are identical for eServer HCAs
1254 */
1255 e_mr->num_kpages = pginfo->num_kpages;
1256 e_mr->num_hwpages = pginfo->num_hwpages;
1257 e_mr->hwpage_size = pginfo->hwpage_size;
1258 e_mr->start = iova_start;
1259 e_mr->size = size;
1260 e_mr->acl = acl;
1261 *lkey = hipzout.lkey;
1262 *rkey = hipzout.rkey;
1263 }
1264
1265 ehca_rereg_mr_rereg1_exit1:
1266 ehca_free_fw_ctrlblock(kpage);
1267 ehca_rereg_mr_rereg1_exit0:
1268 if ( ret && (ret != -EAGAIN) )
1269 ehca_err(&shca->ib_device, "ret=%i lkey=%x rkey=%x "
1270 "pginfo=%p num_kpages=%lx num_hwpages=%lx",
1271 ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1272 pginfo->num_hwpages);
1273 return ret;
1274 } /* end ehca_rereg_mr_rereg1() */
1275
1276 /*----------------------------------------------------------------------*/
1277
1278 int ehca_rereg_mr(struct ehca_shca *shca,
1279 struct ehca_mr *e_mr,
1280 u64 *iova_start,
1281 u64 size,
1282 int acl,
1283 struct ehca_pd *e_pd,
1284 struct ehca_mr_pginfo *pginfo,
1285 u32 *lkey,
1286 u32 *rkey)
1287 {
1288 int ret = 0;
1289 u64 h_ret;
1290 int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1291 int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1292
1293 /* first determine reregistration hCall(s) */
1294 if ((pginfo->num_hwpages > MAX_RPAGES) ||
1295 (e_mr->num_hwpages > MAX_RPAGES) ||
1296 (pginfo->num_hwpages > e_mr->num_hwpages)) {
1297 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1298 "pginfo->num_hwpages=%lx e_mr->num_hwpages=%x",
1299 pginfo->num_hwpages, e_mr->num_hwpages);
1300 rereg_1_hcall = 0;
1301 rereg_3_hcall = 1;
1302 }
1303
1304 if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1305 rereg_1_hcall = 0;
1306 rereg_3_hcall = 1;
1307 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1308 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1309 e_mr);
1310 }
1311
1312 if (rereg_1_hcall) {
1313 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1314 acl, e_pd, pginfo, lkey, rkey);
1315 if (ret) {
1316 if (ret == -EAGAIN)
1317 rereg_3_hcall = 1;
1318 else
1319 goto ehca_rereg_mr_exit0;
1320 }
1321 }
1322
1323 if (rereg_3_hcall) {
1324 struct ehca_mr save_mr;
1325
1326 /* first deregister old MR */
1327 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1328 if (h_ret != H_SUCCESS) {
1329 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1330 "h_ret=%li e_mr=%p hca_hndl=%lx mr_hndl=%lx "
1331 "mr->lkey=%x",
1332 h_ret, e_mr, shca->ipz_hca_handle.handle,
1333 e_mr->ipz_mr_handle.handle,
1334 e_mr->ib.ib_mr.lkey);
1335 ret = ehca2ib_return_code(h_ret);
1336 goto ehca_rereg_mr_exit0;
1337 }
1338 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1339 save_mr = *e_mr;
1340 ehca_mr_deletenew(e_mr);
1341
1342 /* set some MR values */
1343 e_mr->flags = save_mr.flags;
1344 e_mr->hwpage_size = save_mr.hwpage_size;
1345 e_mr->fmr_page_size = save_mr.fmr_page_size;
1346 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1347 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1348 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1349
1350 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1351 e_pd, pginfo, lkey, rkey);
1352 if (ret) {
1353 u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1354 memcpy(&e_mr->flags, &(save_mr.flags),
1355 sizeof(struct ehca_mr) - offset);
1356 goto ehca_rereg_mr_exit0;
1357 }
1358 }
1359
1360 ehca_rereg_mr_exit0:
1361 if (ret)
1362 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1363 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1364 "num_kpages=%lx lkey=%x rkey=%x rereg_1_hcall=%x "
1365 "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1366 acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1367 rereg_1_hcall, rereg_3_hcall);
1368 return ret;
1369 } /* end ehca_rereg_mr() */
1370
1371 /*----------------------------------------------------------------------*/
1372
1373 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1374 struct ehca_mr *e_fmr)
1375 {
1376 int ret = 0;
1377 u64 h_ret;
1378 struct ehca_pd *e_pd =
1379 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1380 struct ehca_mr save_fmr;
1381 u32 tmp_lkey, tmp_rkey;
1382 struct ehca_mr_pginfo pginfo;
1383 struct ehca_mr_hipzout_parms hipzout;
1384 struct ehca_mr save_mr;
1385
1386 if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1387 /*
1388 * note: after using rereg hcall with len=0,
1389 * rereg hcall must be used again for registering pages
1390 */
1391 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1392 0, 0, e_pd->fw_pd, 0, &hipzout);
1393 if (h_ret == H_SUCCESS) {
1394 /* successful reregistration */
1395 e_fmr->start = NULL;
1396 e_fmr->size = 0;
1397 tmp_lkey = hipzout.lkey;
1398 tmp_rkey = hipzout.rkey;
1399 return 0;
1400 }
1401 /*
1402 * should not happen, because length checked above,
1403 * FMRs are not shared and no MW bound to FMRs
1404 */
1405 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1406 "(Rereg1), h_ret=%li e_fmr=%p hca_hndl=%lx "
1407 "mr_hndl=%lx lkey=%x lkey_out=%x",
1408 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1409 e_fmr->ipz_mr_handle.handle,
1410 e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1411 /* try free and rereg */
1412 }
1413
1414 /* first free old FMR */
1415 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1416 if (h_ret != H_SUCCESS) {
1417 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1418 "h_ret=%li e_fmr=%p hca_hndl=%lx mr_hndl=%lx "
1419 "lkey=%x",
1420 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1421 e_fmr->ipz_mr_handle.handle,
1422 e_fmr->ib.ib_fmr.lkey);
1423 ret = ehca2ib_return_code(h_ret);
1424 goto ehca_unmap_one_fmr_exit0;
1425 }
1426 /* clean ehca_mr_t, without changing lock */
1427 save_fmr = *e_fmr;
1428 ehca_mr_deletenew(e_fmr);
1429
1430 /* set some MR values */
1431 e_fmr->flags = save_fmr.flags;
1432 e_fmr->hwpage_size = save_fmr.hwpage_size;
1433 e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1434 e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1435 e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1436 e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1437 e_fmr->acl = save_fmr.acl;
1438
1439 memset(&pginfo, 0, sizeof(pginfo));
1440 pginfo.type = EHCA_MR_PGI_FMR;
1441 ret = ehca_reg_mr(shca, e_fmr, NULL,
1442 (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1443 e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1444 &tmp_rkey);
1445 if (ret) {
1446 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1447 memcpy(&e_fmr->flags, &(save_mr.flags),
1448 sizeof(struct ehca_mr) - offset);
1449 }
1450
1451 ehca_unmap_one_fmr_exit0:
1452 if (ret)
1453 ehca_err(&shca->ib_device, "ret=%i tmp_lkey=%x tmp_rkey=%x "
1454 "fmr_max_pages=%x",
1455 ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1456 return ret;
1457 } /* end ehca_unmap_one_fmr() */
1458
1459 /*----------------------------------------------------------------------*/
1460
1461 int ehca_reg_smr(struct ehca_shca *shca,
1462 struct ehca_mr *e_origmr,
1463 struct ehca_mr *e_newmr,
1464 u64 *iova_start,
1465 int acl,
1466 struct ehca_pd *e_pd,
1467 u32 *lkey, /*OUT*/
1468 u32 *rkey) /*OUT*/
1469 {
1470 int ret = 0;
1471 u64 h_ret;
1472 u32 hipz_acl;
1473 struct ehca_mr_hipzout_parms hipzout;
1474
1475 ehca_mrmw_map_acl(acl, &hipz_acl);
1476 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1477
1478 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1479 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1480 &hipzout);
1481 if (h_ret != H_SUCCESS) {
1482 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%li "
1483 "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1484 "e_pd=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1485 h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1486 shca->ipz_hca_handle.handle,
1487 e_origmr->ipz_mr_handle.handle,
1488 e_origmr->ib.ib_mr.lkey);
1489 ret = ehca2ib_return_code(h_ret);
1490 goto ehca_reg_smr_exit0;
1491 }
1492 /* successful registration */
1493 e_newmr->num_kpages = e_origmr->num_kpages;
1494 e_newmr->num_hwpages = e_origmr->num_hwpages;
1495 e_newmr->hwpage_size = e_origmr->hwpage_size;
1496 e_newmr->start = iova_start;
1497 e_newmr->size = e_origmr->size;
1498 e_newmr->acl = acl;
1499 e_newmr->ipz_mr_handle = hipzout.handle;
1500 *lkey = hipzout.lkey;
1501 *rkey = hipzout.rkey;
1502 return 0;
1503
1504 ehca_reg_smr_exit0:
1505 if (ret)
1506 ehca_err(&shca->ib_device, "ret=%i shca=%p e_origmr=%p "
1507 "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1508 ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1509 return ret;
1510 } /* end ehca_reg_smr() */
1511
1512 /*----------------------------------------------------------------------*/
1513
1514 /* register internal max-MR to internal SHCA */
1515 int ehca_reg_internal_maxmr(
1516 struct ehca_shca *shca,
1517 struct ehca_pd *e_pd,
1518 struct ehca_mr **e_maxmr) /*OUT*/
1519 {
1520 int ret;
1521 struct ehca_mr *e_mr;
1522 u64 *iova_start;
1523 u64 size_maxmr;
1524 struct ehca_mr_pginfo pginfo;
1525 struct ib_phys_buf ib_pbuf;
1526 u32 num_kpages;
1527 u32 num_hwpages;
1528 u64 hw_pgsize;
1529
1530 e_mr = ehca_mr_new();
1531 if (!e_mr) {
1532 ehca_err(&shca->ib_device, "out of memory");
1533 ret = -ENOMEM;
1534 goto ehca_reg_internal_maxmr_exit0;
1535 }
1536 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1537
1538 /* register internal max-MR on HCA */
1539 size_maxmr = (u64)high_memory - PAGE_OFFSET;
1540 iova_start = (u64 *)KERNELBASE;
1541 ib_pbuf.addr = 0;
1542 ib_pbuf.size = size_maxmr;
1543 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1544 PAGE_SIZE);
1545 hw_pgsize = ehca_get_max_hwpage_size(shca);
1546 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1547 hw_pgsize);
1548
1549 memset(&pginfo, 0, sizeof(pginfo));
1550 pginfo.type = EHCA_MR_PGI_PHYS;
1551 pginfo.num_kpages = num_kpages;
1552 pginfo.num_hwpages = num_hwpages;
1553 pginfo.hwpage_size = hw_pgsize;
1554 pginfo.u.phy.num_phys_buf = 1;
1555 pginfo.u.phy.phys_buf_array = &ib_pbuf;
1556
1557 ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1558 &pginfo, &e_mr->ib.ib_mr.lkey,
1559 &e_mr->ib.ib_mr.rkey);
1560 if (ret) {
1561 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1562 "e_mr=%p iova_start=%p size_maxmr=%lx num_kpages=%x "
1563 "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1564 num_kpages, num_hwpages);
1565 goto ehca_reg_internal_maxmr_exit1;
1566 }
1567
1568 /* successful registration of all pages */
1569 e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1570 e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1571 e_mr->ib.ib_mr.uobject = NULL;
1572 atomic_inc(&(e_pd->ib_pd.usecnt));
1573 atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1574 *e_maxmr = e_mr;
1575 return 0;
1576
1577 ehca_reg_internal_maxmr_exit1:
1578 ehca_mr_delete(e_mr);
1579 ehca_reg_internal_maxmr_exit0:
1580 if (ret)
1581 ehca_err(&shca->ib_device, "ret=%i shca=%p e_pd=%p e_maxmr=%p",
1582 ret, shca, e_pd, e_maxmr);
1583 return ret;
1584 } /* end ehca_reg_internal_maxmr() */
1585
1586 /*----------------------------------------------------------------------*/
1587
1588 int ehca_reg_maxmr(struct ehca_shca *shca,
1589 struct ehca_mr *e_newmr,
1590 u64 *iova_start,
1591 int acl,
1592 struct ehca_pd *e_pd,
1593 u32 *lkey,
1594 u32 *rkey)
1595 {
1596 u64 h_ret;
1597 struct ehca_mr *e_origmr = shca->maxmr;
1598 u32 hipz_acl;
1599 struct ehca_mr_hipzout_parms hipzout;
1600
1601 ehca_mrmw_map_acl(acl, &hipz_acl);
1602 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1603
1604 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1605 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1606 &hipzout);
1607 if (h_ret != H_SUCCESS) {
1608 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%li "
1609 "e_origmr=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1610 h_ret, e_origmr, shca->ipz_hca_handle.handle,
1611 e_origmr->ipz_mr_handle.handle,
1612 e_origmr->ib.ib_mr.lkey);
1613 return ehca2ib_return_code(h_ret);
1614 }
1615 /* successful registration */
1616 e_newmr->num_kpages = e_origmr->num_kpages;
1617 e_newmr->num_hwpages = e_origmr->num_hwpages;
1618 e_newmr->hwpage_size = e_origmr->hwpage_size;
1619 e_newmr->start = iova_start;
1620 e_newmr->size = e_origmr->size;
1621 e_newmr->acl = acl;
1622 e_newmr->ipz_mr_handle = hipzout.handle;
1623 *lkey = hipzout.lkey;
1624 *rkey = hipzout.rkey;
1625 return 0;
1626 } /* end ehca_reg_maxmr() */
1627
1628 /*----------------------------------------------------------------------*/
1629
1630 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1631 {
1632 int ret;
1633 struct ehca_mr *e_maxmr;
1634 struct ib_pd *ib_pd;
1635
1636 if (!shca->maxmr) {
1637 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1638 ret = -EINVAL;
1639 goto ehca_dereg_internal_maxmr_exit0;
1640 }
1641
1642 e_maxmr = shca->maxmr;
1643 ib_pd = e_maxmr->ib.ib_mr.pd;
1644 shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1645
1646 ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1647 if (ret) {
1648 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1649 "ret=%i e_maxmr=%p shca=%p lkey=%x",
1650 ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1651 shca->maxmr = e_maxmr;
1652 goto ehca_dereg_internal_maxmr_exit0;
1653 }
1654
1655 atomic_dec(&ib_pd->usecnt);
1656
1657 ehca_dereg_internal_maxmr_exit0:
1658 if (ret)
1659 ehca_err(&shca->ib_device, "ret=%i shca=%p shca->maxmr=%p",
1660 ret, shca, shca->maxmr);
1661 return ret;
1662 } /* end ehca_dereg_internal_maxmr() */
1663
1664 /*----------------------------------------------------------------------*/
1665
1666 /*
1667 * check physical buffer array of MR verbs for validness and
1668 * calculates MR size
1669 */
1670 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1671 int num_phys_buf,
1672 u64 *iova_start,
1673 u64 *size)
1674 {
1675 struct ib_phys_buf *pbuf = phys_buf_array;
1676 u64 size_count = 0;
1677 u32 i;
1678
1679 if (num_phys_buf == 0) {
1680 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1681 return -EINVAL;
1682 }
1683 /* check first buffer */
1684 if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1685 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1686 "pbuf->addr=%lx pbuf->size=%lx",
1687 iova_start, pbuf->addr, pbuf->size);
1688 return -EINVAL;
1689 }
1690 if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1691 (num_phys_buf > 1)) {
1692 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%lx "
1693 "pbuf->size=%lx", pbuf->addr, pbuf->size);
1694 return -EINVAL;
1695 }
1696
1697 for (i = 0; i < num_phys_buf; i++) {
1698 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1699 ehca_gen_err("bad address, i=%x pbuf->addr=%lx "
1700 "pbuf->size=%lx",
1701 i, pbuf->addr, pbuf->size);
1702 return -EINVAL;
1703 }
1704 if (((i > 0) && /* not 1st */
1705 (i < (num_phys_buf - 1)) && /* not last */
1706 (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1707 ehca_gen_err("bad size, i=%x pbuf->size=%lx",
1708 i, pbuf->size);
1709 return -EINVAL;
1710 }
1711 size_count += pbuf->size;
1712 pbuf++;
1713 }
1714
1715 *size = size_count;
1716 return 0;
1717 } /* end ehca_mr_chk_buf_and_calc_size() */
1718
1719 /*----------------------------------------------------------------------*/
1720
1721 /* check page list of map FMR verb for validness */
1722 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1723 u64 *page_list,
1724 int list_len)
1725 {
1726 u32 i;
1727 u64 *page;
1728
1729 if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1730 ehca_gen_err("bad list_len, list_len=%x "
1731 "e_fmr->fmr_max_pages=%x fmr=%p",
1732 list_len, e_fmr->fmr_max_pages, e_fmr);
1733 return -EINVAL;
1734 }
1735
1736 /* each page must be aligned */
1737 page = page_list;
1738 for (i = 0; i < list_len; i++) {
1739 if (*page % e_fmr->fmr_page_size) {
1740 ehca_gen_err("bad page, i=%x *page=%lx page=%p fmr=%p "
1741 "fmr_page_size=%x", i, *page, page, e_fmr,
1742 e_fmr->fmr_page_size);
1743 return -EINVAL;
1744 }
1745 page++;
1746 }
1747
1748 return 0;
1749 } /* end ehca_fmr_check_page_list() */
1750
1751 /*----------------------------------------------------------------------*/
1752
1753 /* PAGE_SIZE >= pginfo->hwpage_size */
1754 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1755 u32 number,
1756 u64 *kpage)
1757 {
1758 int ret = 0;
1759 struct ib_umem_chunk *prev_chunk;
1760 struct ib_umem_chunk *chunk;
1761 u64 pgaddr;
1762 u32 i = 0;
1763 u32 j = 0;
1764 int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1765
1766 /* loop over desired chunk entries */
1767 chunk = pginfo->u.usr.next_chunk;
1768 prev_chunk = pginfo->u.usr.next_chunk;
1769 list_for_each_entry_continue(
1770 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1771 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1772 pgaddr = page_to_pfn(sg_page(&chunk->page_list[i]))
1773 << PAGE_SHIFT ;
1774 *kpage = phys_to_abs(pgaddr +
1775 (pginfo->next_hwpage *
1776 pginfo->hwpage_size));
1777 if ( !(*kpage) ) {
1778 ehca_gen_err("pgaddr=%lx "
1779 "chunk->page_list[i]=%lx "
1780 "i=%x next_hwpage=%lx",
1781 pgaddr, (u64)sg_dma_address(
1782 &chunk->page_list[i]),
1783 i, pginfo->next_hwpage);
1784 return -EFAULT;
1785 }
1786 (pginfo->hwpage_cnt)++;
1787 (pginfo->next_hwpage)++;
1788 kpage++;
1789 if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1790 (pginfo->kpage_cnt)++;
1791 (pginfo->u.usr.next_nmap)++;
1792 pginfo->next_hwpage = 0;
1793 i++;
1794 }
1795 j++;
1796 if (j >= number) break;
1797 }
1798 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1799 (j >= number)) {
1800 pginfo->u.usr.next_nmap = 0;
1801 prev_chunk = chunk;
1802 break;
1803 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1804 pginfo->u.usr.next_nmap = 0;
1805 prev_chunk = chunk;
1806 } else if (j >= number)
1807 break;
1808 else
1809 prev_chunk = chunk;
1810 }
1811 pginfo->u.usr.next_chunk =
1812 list_prepare_entry(prev_chunk,
1813 (&(pginfo->u.usr.region->chunk_list)),
1814 list);
1815 return ret;
1816 }
1817
1818 /*
1819 * check given pages for contiguous layout
1820 * last page addr is returned in prev_pgaddr for further check
1821 */
1822 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1823 int start_idx, int end_idx,
1824 u64 *prev_pgaddr)
1825 {
1826 int t;
1827 for (t = start_idx; t <= end_idx; t++) {
1828 u64 pgaddr = page_to_pfn(sg_page(&page_list[t])) << PAGE_SHIFT;
1829 ehca_gen_dbg("chunk_page=%lx value=%016lx", pgaddr,
1830 *(u64 *)abs_to_virt(phys_to_abs(pgaddr)));
1831 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1832 ehca_gen_err("uncontiguous page found pgaddr=%lx "
1833 "prev_pgaddr=%lx page_list_i=%x",
1834 pgaddr, *prev_pgaddr, t);
1835 return -EINVAL;
1836 }
1837 *prev_pgaddr = pgaddr;
1838 }
1839 return 0;
1840 }
1841
1842 /* PAGE_SIZE < pginfo->hwpage_size */
1843 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1844 u32 number,
1845 u64 *kpage)
1846 {
1847 int ret = 0;
1848 struct ib_umem_chunk *prev_chunk;
1849 struct ib_umem_chunk *chunk;
1850 u64 pgaddr, prev_pgaddr;
1851 u32 i = 0;
1852 u32 j = 0;
1853 int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1854 int nr_kpages = kpages_per_hwpage;
1855
1856 /* loop over desired chunk entries */
1857 chunk = pginfo->u.usr.next_chunk;
1858 prev_chunk = pginfo->u.usr.next_chunk;
1859 list_for_each_entry_continue(
1860 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1861 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1862 if (nr_kpages == kpages_per_hwpage) {
1863 pgaddr = ( page_to_pfn(sg_page(&chunk->page_list[i]))
1864 << PAGE_SHIFT );
1865 *kpage = phys_to_abs(pgaddr);
1866 if ( !(*kpage) ) {
1867 ehca_gen_err("pgaddr=%lx i=%x",
1868 pgaddr, i);
1869 ret = -EFAULT;
1870 return ret;
1871 }
1872 /*
1873 * The first page in a hwpage must be aligned;
1874 * the first MR page is exempt from this rule.
1875 */
1876 if (pgaddr & (pginfo->hwpage_size - 1)) {
1877 if (pginfo->hwpage_cnt) {
1878 ehca_gen_err(
1879 "invalid alignment "
1880 "pgaddr=%lx i=%x "
1881 "mr_pgsize=%lx",
1882 pgaddr, i,
1883 pginfo->hwpage_size);
1884 ret = -EFAULT;
1885 return ret;
1886 }
1887 /* first MR page */
1888 pginfo->kpage_cnt =
1889 (pgaddr &
1890 (pginfo->hwpage_size - 1)) >>
1891 PAGE_SHIFT;
1892 nr_kpages -= pginfo->kpage_cnt;
1893 *kpage = phys_to_abs(
1894 pgaddr &
1895 ~(pginfo->hwpage_size - 1));
1896 }
1897 ehca_gen_dbg("kpage=%lx chunk_page=%lx "
1898 "value=%016lx", *kpage, pgaddr,
1899 *(u64 *)abs_to_virt(
1900 phys_to_abs(pgaddr)));
1901 prev_pgaddr = pgaddr;
1902 i++;
1903 pginfo->kpage_cnt++;
1904 pginfo->u.usr.next_nmap++;
1905 nr_kpages--;
1906 if (!nr_kpages)
1907 goto next_kpage;
1908 continue;
1909 }
1910 if (i + nr_kpages > chunk->nmap) {
1911 ret = ehca_check_kpages_per_ate(
1912 chunk->page_list, i,
1913 chunk->nmap - 1, &prev_pgaddr);
1914 if (ret) return ret;
1915 pginfo->kpage_cnt += chunk->nmap - i;
1916 pginfo->u.usr.next_nmap += chunk->nmap - i;
1917 nr_kpages -= chunk->nmap - i;
1918 break;
1919 }
1920
1921 ret = ehca_check_kpages_per_ate(chunk->page_list, i,
1922 i + nr_kpages - 1,
1923 &prev_pgaddr);
1924 if (ret) return ret;
1925 i += nr_kpages;
1926 pginfo->kpage_cnt += nr_kpages;
1927 pginfo->u.usr.next_nmap += nr_kpages;
1928 next_kpage:
1929 nr_kpages = kpages_per_hwpage;
1930 (pginfo->hwpage_cnt)++;
1931 kpage++;
1932 j++;
1933 if (j >= number) break;
1934 }
1935 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1936 (j >= number)) {
1937 pginfo->u.usr.next_nmap = 0;
1938 prev_chunk = chunk;
1939 break;
1940 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1941 pginfo->u.usr.next_nmap = 0;
1942 prev_chunk = chunk;
1943 } else if (j >= number)
1944 break;
1945 else
1946 prev_chunk = chunk;
1947 }
1948 pginfo->u.usr.next_chunk =
1949 list_prepare_entry(prev_chunk,
1950 (&(pginfo->u.usr.region->chunk_list)),
1951 list);
1952 return ret;
1953 }
1954
1955 int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
1956 u32 number,
1957 u64 *kpage)
1958 {
1959 int ret = 0;
1960 struct ib_phys_buf *pbuf;
1961 u64 num_hw, offs_hw;
1962 u32 i = 0;
1963
1964 /* loop over desired phys_buf_array entries */
1965 while (i < number) {
1966 pbuf = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
1967 num_hw = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
1968 pbuf->size, pginfo->hwpage_size);
1969 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
1970 pginfo->hwpage_size;
1971 while (pginfo->next_hwpage < offs_hw + num_hw) {
1972 /* sanity check */
1973 if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
1974 (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
1975 ehca_gen_err("kpage_cnt >= num_kpages, "
1976 "kpage_cnt=%lx num_kpages=%lx "
1977 "hwpage_cnt=%lx "
1978 "num_hwpages=%lx i=%x",
1979 pginfo->kpage_cnt,
1980 pginfo->num_kpages,
1981 pginfo->hwpage_cnt,
1982 pginfo->num_hwpages, i);
1983 return -EFAULT;
1984 }
1985 *kpage = phys_to_abs(
1986 (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
1987 (pginfo->next_hwpage * pginfo->hwpage_size));
1988 if ( !(*kpage) && pbuf->addr ) {
1989 ehca_gen_err("pbuf->addr=%lx pbuf->size=%lx "
1990 "next_hwpage=%lx", pbuf->addr,
1991 pbuf->size, pginfo->next_hwpage);
1992 return -EFAULT;
1993 }
1994 (pginfo->hwpage_cnt)++;
1995 (pginfo->next_hwpage)++;
1996 if (PAGE_SIZE >= pginfo->hwpage_size) {
1997 if (pginfo->next_hwpage %
1998 (PAGE_SIZE / pginfo->hwpage_size) == 0)
1999 (pginfo->kpage_cnt)++;
2000 } else
2001 pginfo->kpage_cnt += pginfo->hwpage_size /
2002 PAGE_SIZE;
2003 kpage++;
2004 i++;
2005 if (i >= number) break;
2006 }
2007 if (pginfo->next_hwpage >= offs_hw + num_hw) {
2008 (pginfo->u.phy.next_buf)++;
2009 pginfo->next_hwpage = 0;
2010 }
2011 }
2012 return ret;
2013 }
2014
2015 int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
2016 u32 number,
2017 u64 *kpage)
2018 {
2019 int ret = 0;
2020 u64 *fmrlist;
2021 u32 i;
2022
2023 /* loop over desired page_list entries */
2024 fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
2025 for (i = 0; i < number; i++) {
2026 *kpage = phys_to_abs((*fmrlist & ~(pginfo->hwpage_size - 1)) +
2027 pginfo->next_hwpage * pginfo->hwpage_size);
2028 if ( !(*kpage) ) {
2029 ehca_gen_err("*fmrlist=%lx fmrlist=%p "
2030 "next_listelem=%lx next_hwpage=%lx",
2031 *fmrlist, fmrlist,
2032 pginfo->u.fmr.next_listelem,
2033 pginfo->next_hwpage);
2034 return -EFAULT;
2035 }
2036 (pginfo->hwpage_cnt)++;
2037 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2038 if (pginfo->next_hwpage %
2039 (pginfo->u.fmr.fmr_pgsize /
2040 pginfo->hwpage_size) == 0) {
2041 (pginfo->kpage_cnt)++;
2042 (pginfo->u.fmr.next_listelem)++;
2043 fmrlist++;
2044 pginfo->next_hwpage = 0;
2045 } else
2046 (pginfo->next_hwpage)++;
2047 } else {
2048 unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2049 pginfo->u.fmr.fmr_pgsize;
2050 unsigned int j;
2051 u64 prev = *kpage;
2052 /* check if adrs are contiguous */
2053 for (j = 1; j < cnt_per_hwpage; j++) {
2054 u64 p = phys_to_abs(fmrlist[j] &
2055 ~(pginfo->hwpage_size - 1));
2056 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2057 ehca_gen_err("uncontiguous fmr pages "
2058 "found prev=%lx p=%lx "
2059 "idx=%x", prev, p, i + j);
2060 return -EINVAL;
2061 }
2062 prev = p;
2063 }
2064 pginfo->kpage_cnt += cnt_per_hwpage;
2065 pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2066 fmrlist += cnt_per_hwpage;
2067 }
2068 kpage++;
2069 }
2070 return ret;
2071 }
2072
2073 /* setup page buffer from page info */
2074 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2075 u32 number,
2076 u64 *kpage)
2077 {
2078 int ret;
2079
2080 switch (pginfo->type) {
2081 case EHCA_MR_PGI_PHYS:
2082 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2083 break;
2084 case EHCA_MR_PGI_USER:
2085 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2086 ehca_set_pagebuf_user1(pginfo, number, kpage) :
2087 ehca_set_pagebuf_user2(pginfo, number, kpage);
2088 break;
2089 case EHCA_MR_PGI_FMR:
2090 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2091 break;
2092 default:
2093 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2094 ret = -EFAULT;
2095 break;
2096 }
2097 return ret;
2098 } /* end ehca_set_pagebuf() */
2099
2100 /*----------------------------------------------------------------------*/
2101
2102 /*
2103 * check MR if it is a max-MR, i.e. uses whole memory
2104 * in case it's a max-MR 1 is returned, else 0
2105 */
2106 int ehca_mr_is_maxmr(u64 size,
2107 u64 *iova_start)
2108 {
2109 /* a MR is treated as max-MR only if it fits following: */
2110 if ((size == ((u64)high_memory - PAGE_OFFSET)) &&
2111 (iova_start == (void *)KERNELBASE)) {
2112 ehca_gen_dbg("this is a max-MR");
2113 return 1;
2114 } else
2115 return 0;
2116 } /* end ehca_mr_is_maxmr() */
2117
2118 /*----------------------------------------------------------------------*/
2119
2120 /* map access control for MR/MW. This routine is used for MR and MW. */
2121 void ehca_mrmw_map_acl(int ib_acl,
2122 u32 *hipz_acl)
2123 {
2124 *hipz_acl = 0;
2125 if (ib_acl & IB_ACCESS_REMOTE_READ)
2126 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2127 if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2128 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2129 if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2130 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2131 if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2132 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2133 if (ib_acl & IB_ACCESS_MW_BIND)
2134 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2135 } /* end ehca_mrmw_map_acl() */
2136
2137 /*----------------------------------------------------------------------*/
2138
2139 /* sets page size in hipz access control for MR/MW. */
2140 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2141 {
2142 *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2143 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2144
2145 /*----------------------------------------------------------------------*/
2146
2147 /*
2148 * reverse map access control for MR/MW.
2149 * This routine is used for MR and MW.
2150 */
2151 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2152 int *ib_acl) /*OUT*/
2153 {
2154 *ib_acl = 0;
2155 if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2156 *ib_acl |= IB_ACCESS_REMOTE_READ;
2157 if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2158 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2159 if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2160 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2161 if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2162 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2163 if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2164 *ib_acl |= IB_ACCESS_MW_BIND;
2165 } /* end ehca_mrmw_reverse_map_acl() */
2166
2167
2168 /*----------------------------------------------------------------------*/
2169
2170 /*
2171 * MR destructor and constructor
2172 * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2173 * except struct ib_mr and spinlock
2174 */
2175 void ehca_mr_deletenew(struct ehca_mr *mr)
2176 {
2177 mr->flags = 0;
2178 mr->num_kpages = 0;
2179 mr->num_hwpages = 0;
2180 mr->acl = 0;
2181 mr->start = NULL;
2182 mr->fmr_page_size = 0;
2183 mr->fmr_max_pages = 0;
2184 mr->fmr_max_maps = 0;
2185 mr->fmr_map_cnt = 0;
2186 memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2187 memset(&mr->galpas, 0, sizeof(mr->galpas));
2188 } /* end ehca_mr_deletenew() */
2189
2190 int ehca_init_mrmw_cache(void)
2191 {
2192 mr_cache = kmem_cache_create("ehca_cache_mr",
2193 sizeof(struct ehca_mr), 0,
2194 SLAB_HWCACHE_ALIGN,
2195 NULL);
2196 if (!mr_cache)
2197 return -ENOMEM;
2198 mw_cache = kmem_cache_create("ehca_cache_mw",
2199 sizeof(struct ehca_mw), 0,
2200 SLAB_HWCACHE_ALIGN,
2201 NULL);
2202 if (!mw_cache) {
2203 kmem_cache_destroy(mr_cache);
2204 mr_cache = NULL;
2205 return -ENOMEM;
2206 }
2207 return 0;
2208 }
2209
2210 void ehca_cleanup_mrmw_cache(void)
2211 {
2212 if (mr_cache)
2213 kmem_cache_destroy(mr_cache);
2214 if (mw_cache)
2215 kmem_cache_destroy(mw_cache);
2216 }
kernel source for telekom puls (alcatel/mediatek)