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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[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 /* max number of rpages (per hcall register_rpages) */
55 #define MAX_RPAGES 512
56
57 static struct kmem_cache *mr_cache;
58 static struct kmem_cache *mw_cache;
59
60 enum ehca_mr_pgsize {
61 EHCA_MR_PGSIZE4K = 0x1000L,
62 EHCA_MR_PGSIZE64K = 0x10000L,
63 EHCA_MR_PGSIZE1M = 0x100000L,
64 EHCA_MR_PGSIZE16M = 0x1000000L
65 };
66
67 static u32 ehca_encode_hwpage_size(u32 pgsize)
68 {
69 u32 idx = 0;
70 pgsize >>= 12;
71 /*
72 * map mr page size into hw code:
73 * 0, 1, 2, 3 for 4K, 64K, 1M, 64M
74 */
75 while (!(pgsize & 1)) {
76 idx++;
77 pgsize >>= 4;
78 }
79 return idx;
80 }
81
82 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
83 {
84 if (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)
85 return EHCA_MR_PGSIZE16M;
86 return EHCA_MR_PGSIZE4K;
87 }
88
89 static struct ehca_mr *ehca_mr_new(void)
90 {
91 struct ehca_mr *me;
92
93 me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
94 if (me)
95 spin_lock_init(&me->mrlock);
96 else
97 ehca_gen_err("alloc failed");
98
99 return me;
100 }
101
102 static void ehca_mr_delete(struct ehca_mr *me)
103 {
104 kmem_cache_free(mr_cache, me);
105 }
106
107 static struct ehca_mw *ehca_mw_new(void)
108 {
109 struct ehca_mw *me;
110
111 me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
112 if (me)
113 spin_lock_init(&me->mwlock);
114 else
115 ehca_gen_err("alloc failed");
116
117 return me;
118 }
119
120 static void ehca_mw_delete(struct ehca_mw *me)
121 {
122 kmem_cache_free(mw_cache, me);
123 }
124
125 /*----------------------------------------------------------------------*/
126
127 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
128 {
129 struct ib_mr *ib_mr;
130 int ret;
131 struct ehca_mr *e_maxmr;
132 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
133 struct ehca_shca *shca =
134 container_of(pd->device, struct ehca_shca, ib_device);
135
136 if (shca->maxmr) {
137 e_maxmr = ehca_mr_new();
138 if (!e_maxmr) {
139 ehca_err(&shca->ib_device, "out of memory");
140 ib_mr = ERR_PTR(-ENOMEM);
141 goto get_dma_mr_exit0;
142 }
143
144 ret = ehca_reg_maxmr(shca, e_maxmr, (u64 *)KERNELBASE,
145 mr_access_flags, e_pd,
146 &e_maxmr->ib.ib_mr.lkey,
147 &e_maxmr->ib.ib_mr.rkey);
148 if (ret) {
149 ehca_mr_delete(e_maxmr);
150 ib_mr = ERR_PTR(ret);
151 goto get_dma_mr_exit0;
152 }
153 ib_mr = &e_maxmr->ib.ib_mr;
154 } else {
155 ehca_err(&shca->ib_device, "no internal max-MR exist!");
156 ib_mr = ERR_PTR(-EINVAL);
157 goto get_dma_mr_exit0;
158 }
159
160 get_dma_mr_exit0:
161 if (IS_ERR(ib_mr))
162 ehca_err(&shca->ib_device, "rc=%lx pd=%p mr_access_flags=%x ",
163 PTR_ERR(ib_mr), pd, mr_access_flags);
164 return ib_mr;
165 } /* end ehca_get_dma_mr() */
166
167 /*----------------------------------------------------------------------*/
168
169 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
170 struct ib_phys_buf *phys_buf_array,
171 int num_phys_buf,
172 int mr_access_flags,
173 u64 *iova_start)
174 {
175 struct ib_mr *ib_mr;
176 int ret;
177 struct ehca_mr *e_mr;
178 struct ehca_shca *shca =
179 container_of(pd->device, struct ehca_shca, ib_device);
180 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
181
182 u64 size;
183
184 if ((num_phys_buf <= 0) || !phys_buf_array) {
185 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
186 "phys_buf_array=%p", num_phys_buf, phys_buf_array);
187 ib_mr = ERR_PTR(-EINVAL);
188 goto reg_phys_mr_exit0;
189 }
190 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
191 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
192 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
193 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
194 /*
195 * Remote Write Access requires Local Write Access
196 * Remote Atomic Access requires Local Write Access
197 */
198 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
199 mr_access_flags);
200 ib_mr = ERR_PTR(-EINVAL);
201 goto reg_phys_mr_exit0;
202 }
203
204 /* check physical buffer list and calculate size */
205 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
206 iova_start, &size);
207 if (ret) {
208 ib_mr = ERR_PTR(ret);
209 goto reg_phys_mr_exit0;
210 }
211 if ((size == 0) ||
212 (((u64)iova_start + size) < (u64)iova_start)) {
213 ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
214 size, iova_start);
215 ib_mr = ERR_PTR(-EINVAL);
216 goto reg_phys_mr_exit0;
217 }
218
219 e_mr = ehca_mr_new();
220 if (!e_mr) {
221 ehca_err(pd->device, "out of memory");
222 ib_mr = ERR_PTR(-ENOMEM);
223 goto reg_phys_mr_exit0;
224 }
225
226 /* register MR on HCA */
227 if (ehca_mr_is_maxmr(size, iova_start)) {
228 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
229 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
230 e_pd, &e_mr->ib.ib_mr.lkey,
231 &e_mr->ib.ib_mr.rkey);
232 if (ret) {
233 ib_mr = ERR_PTR(ret);
234 goto reg_phys_mr_exit1;
235 }
236 } else {
237 struct ehca_mr_pginfo pginfo;
238 u32 num_kpages;
239 u32 num_hwpages;
240 u64 hw_pgsize;
241
242 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
243 PAGE_SIZE);
244 /* for kernel space we try most possible pgsize */
245 hw_pgsize = ehca_get_max_hwpage_size(shca);
246 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
247 hw_pgsize);
248 memset(&pginfo, 0, sizeof(pginfo));
249 pginfo.type = EHCA_MR_PGI_PHYS;
250 pginfo.num_kpages = num_kpages;
251 pginfo.hwpage_size = hw_pgsize;
252 pginfo.num_hwpages = num_hwpages;
253 pginfo.u.phy.num_phys_buf = num_phys_buf;
254 pginfo.u.phy.phys_buf_array = phys_buf_array;
255 pginfo.next_hwpage =
256 ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
257
258 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
259 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
260 &e_mr->ib.ib_mr.rkey);
261 if (ret) {
262 ib_mr = ERR_PTR(ret);
263 goto reg_phys_mr_exit1;
264 }
265 }
266
267 /* successful registration of all pages */
268 return &e_mr->ib.ib_mr;
269
270 reg_phys_mr_exit1:
271 ehca_mr_delete(e_mr);
272 reg_phys_mr_exit0:
273 if (IS_ERR(ib_mr))
274 ehca_err(pd->device, "rc=%lx pd=%p phys_buf_array=%p "
275 "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
276 PTR_ERR(ib_mr), pd, phys_buf_array,
277 num_phys_buf, mr_access_flags, iova_start);
278 return ib_mr;
279 } /* end ehca_reg_phys_mr() */
280
281 /*----------------------------------------------------------------------*/
282
283 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
284 u64 virt, int mr_access_flags,
285 struct ib_udata *udata)
286 {
287 struct ib_mr *ib_mr;
288 struct ehca_mr *e_mr;
289 struct ehca_shca *shca =
290 container_of(pd->device, struct ehca_shca, ib_device);
291 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
292 struct ehca_mr_pginfo pginfo;
293 int ret;
294 u32 num_kpages;
295 u32 num_hwpages;
296 u64 hwpage_size;
297
298 if (!pd) {
299 ehca_gen_err("bad pd=%p", pd);
300 return ERR_PTR(-EFAULT);
301 }
302
303 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
304 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
305 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
306 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
307 /*
308 * Remote Write Access requires Local Write Access
309 * Remote Atomic Access requires Local Write Access
310 */
311 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
312 mr_access_flags);
313 ib_mr = ERR_PTR(-EINVAL);
314 goto reg_user_mr_exit0;
315 }
316
317 if (length == 0 || virt + length < virt) {
318 ehca_err(pd->device, "bad input values: length=%lx "
319 "virt_base=%lx", length, virt);
320 ib_mr = ERR_PTR(-EINVAL);
321 goto reg_user_mr_exit0;
322 }
323
324 e_mr = ehca_mr_new();
325 if (!e_mr) {
326 ehca_err(pd->device, "out of memory");
327 ib_mr = ERR_PTR(-ENOMEM);
328 goto reg_user_mr_exit0;
329 }
330
331 e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
332 mr_access_flags);
333 if (IS_ERR(e_mr->umem)) {
334 ib_mr = (void *)e_mr->umem;
335 goto reg_user_mr_exit1;
336 }
337
338 if (e_mr->umem->page_size != PAGE_SIZE) {
339 ehca_err(pd->device, "page size not supported, "
340 "e_mr->umem->page_size=%x", e_mr->umem->page_size);
341 ib_mr = ERR_PTR(-EINVAL);
342 goto reg_user_mr_exit2;
343 }
344
345 /* determine number of MR pages */
346 num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
347 /* select proper hw_pgsize */
348 if (ehca_mr_largepage &&
349 (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)) {
350 if (length <= EHCA_MR_PGSIZE4K
351 && PAGE_SIZE == EHCA_MR_PGSIZE4K)
352 hwpage_size = EHCA_MR_PGSIZE4K;
353 else if (length <= EHCA_MR_PGSIZE64K)
354 hwpage_size = EHCA_MR_PGSIZE64K;
355 else if (length <= EHCA_MR_PGSIZE1M)
356 hwpage_size = EHCA_MR_PGSIZE1M;
357 else
358 hwpage_size = EHCA_MR_PGSIZE16M;
359 } else
360 hwpage_size = EHCA_MR_PGSIZE4K;
361 ehca_dbg(pd->device, "hwpage_size=%lx", hwpage_size);
362
363 reg_user_mr_fallback:
364 num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
365 /* register MR on HCA */
366 memset(&pginfo, 0, sizeof(pginfo));
367 pginfo.type = EHCA_MR_PGI_USER;
368 pginfo.hwpage_size = hwpage_size;
369 pginfo.num_kpages = num_kpages;
370 pginfo.num_hwpages = num_hwpages;
371 pginfo.u.usr.region = e_mr->umem;
372 pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
373 pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
374 (&e_mr->umem->chunk_list),
375 list);
376
377 ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
378 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
379 &e_mr->ib.ib_mr.rkey);
380 if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
381 ehca_warn(pd->device, "failed to register mr "
382 "with hwpage_size=%lx", hwpage_size);
383 ehca_info(pd->device, "try to register mr with "
384 "kpage_size=%lx", PAGE_SIZE);
385 /*
386 * this means kpages are not contiguous for a hw page
387 * try kernel page size as fallback solution
388 */
389 hwpage_size = PAGE_SIZE;
390 goto reg_user_mr_fallback;
391 }
392 if (ret) {
393 ib_mr = ERR_PTR(ret);
394 goto reg_user_mr_exit2;
395 }
396
397 /* successful registration of all pages */
398 return &e_mr->ib.ib_mr;
399
400 reg_user_mr_exit2:
401 ib_umem_release(e_mr->umem);
402 reg_user_mr_exit1:
403 ehca_mr_delete(e_mr);
404 reg_user_mr_exit0:
405 if (IS_ERR(ib_mr))
406 ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x"
407 " udata=%p",
408 PTR_ERR(ib_mr), pd, mr_access_flags, udata);
409 return ib_mr;
410 } /* end ehca_reg_user_mr() */
411
412 /*----------------------------------------------------------------------*/
413
414 int ehca_rereg_phys_mr(struct ib_mr *mr,
415 int mr_rereg_mask,
416 struct ib_pd *pd,
417 struct ib_phys_buf *phys_buf_array,
418 int num_phys_buf,
419 int mr_access_flags,
420 u64 *iova_start)
421 {
422 int ret;
423
424 struct ehca_shca *shca =
425 container_of(mr->device, struct ehca_shca, ib_device);
426 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
427 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
428 u64 new_size;
429 u64 *new_start;
430 u32 new_acl;
431 struct ehca_pd *new_pd;
432 u32 tmp_lkey, tmp_rkey;
433 unsigned long sl_flags;
434 u32 num_kpages = 0;
435 u32 num_hwpages = 0;
436 struct ehca_mr_pginfo pginfo;
437 u32 cur_pid = current->tgid;
438
439 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
440 (my_pd->ownpid != cur_pid)) {
441 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
442 cur_pid, my_pd->ownpid);
443 ret = -EINVAL;
444 goto rereg_phys_mr_exit0;
445 }
446
447 if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
448 /* TODO not supported, because PHYP rereg hCall needs pages */
449 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
450 "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
451 ret = -EINVAL;
452 goto rereg_phys_mr_exit0;
453 }
454
455 if (mr_rereg_mask & IB_MR_REREG_PD) {
456 if (!pd) {
457 ehca_err(mr->device, "rereg with bad pd, pd=%p "
458 "mr_rereg_mask=%x", pd, mr_rereg_mask);
459 ret = -EINVAL;
460 goto rereg_phys_mr_exit0;
461 }
462 }
463
464 if ((mr_rereg_mask &
465 ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
466 (mr_rereg_mask == 0)) {
467 ret = -EINVAL;
468 goto rereg_phys_mr_exit0;
469 }
470
471 /* check other parameters */
472 if (e_mr == shca->maxmr) {
473 /* should be impossible, however reject to be sure */
474 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
475 "shca->maxmr=%p mr->lkey=%x",
476 mr, shca->maxmr, mr->lkey);
477 ret = -EINVAL;
478 goto rereg_phys_mr_exit0;
479 }
480 if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
481 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
482 ehca_err(mr->device, "not supported for FMR, mr=%p "
483 "flags=%x", mr, e_mr->flags);
484 ret = -EINVAL;
485 goto rereg_phys_mr_exit0;
486 }
487 if (!phys_buf_array || num_phys_buf <= 0) {
488 ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
489 " phys_buf_array=%p num_phys_buf=%x",
490 mr_rereg_mask, phys_buf_array, num_phys_buf);
491 ret = -EINVAL;
492 goto rereg_phys_mr_exit0;
493 }
494 }
495 if ((mr_rereg_mask & IB_MR_REREG_ACCESS) && /* change ACL */
496 (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
497 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
498 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
499 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
500 /*
501 * Remote Write Access requires Local Write Access
502 * Remote Atomic Access requires Local Write Access
503 */
504 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
505 "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
506 ret = -EINVAL;
507 goto rereg_phys_mr_exit0;
508 }
509
510 /* set requested values dependent on rereg request */
511 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
512 new_start = e_mr->start;
513 new_size = e_mr->size;
514 new_acl = e_mr->acl;
515 new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
516
517 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
518 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
519
520 new_start = iova_start; /* change address */
521 /* check physical buffer list and calculate size */
522 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
523 num_phys_buf, iova_start,
524 &new_size);
525 if (ret)
526 goto rereg_phys_mr_exit1;
527 if ((new_size == 0) ||
528 (((u64)iova_start + new_size) < (u64)iova_start)) {
529 ehca_err(mr->device, "bad input values: new_size=%lx "
530 "iova_start=%p", new_size, iova_start);
531 ret = -EINVAL;
532 goto rereg_phys_mr_exit1;
533 }
534 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
535 new_size, PAGE_SIZE);
536 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
537 new_size, hw_pgsize);
538 memset(&pginfo, 0, sizeof(pginfo));
539 pginfo.type = EHCA_MR_PGI_PHYS;
540 pginfo.num_kpages = num_kpages;
541 pginfo.hwpage_size = hw_pgsize;
542 pginfo.num_hwpages = num_hwpages;
543 pginfo.u.phy.num_phys_buf = num_phys_buf;
544 pginfo.u.phy.phys_buf_array = phys_buf_array;
545 pginfo.next_hwpage =
546 ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
547 }
548 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
549 new_acl = mr_access_flags;
550 if (mr_rereg_mask & IB_MR_REREG_PD)
551 new_pd = container_of(pd, struct ehca_pd, ib_pd);
552
553 ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
554 new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
555 if (ret)
556 goto rereg_phys_mr_exit1;
557
558 /* successful reregistration */
559 if (mr_rereg_mask & IB_MR_REREG_PD)
560 mr->pd = pd;
561 mr->lkey = tmp_lkey;
562 mr->rkey = tmp_rkey;
563
564 rereg_phys_mr_exit1:
565 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
566 rereg_phys_mr_exit0:
567 if (ret)
568 ehca_err(mr->device, "ret=%x mr=%p mr_rereg_mask=%x pd=%p "
569 "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
570 "iova_start=%p",
571 ret, mr, mr_rereg_mask, pd, phys_buf_array,
572 num_phys_buf, mr_access_flags, iova_start);
573 return ret;
574 } /* end ehca_rereg_phys_mr() */
575
576 /*----------------------------------------------------------------------*/
577
578 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
579 {
580 int ret = 0;
581 u64 h_ret;
582 struct ehca_shca *shca =
583 container_of(mr->device, struct ehca_shca, ib_device);
584 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
585 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
586 u32 cur_pid = current->tgid;
587 unsigned long sl_flags;
588 struct ehca_mr_hipzout_parms hipzout;
589
590 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
591 (my_pd->ownpid != cur_pid)) {
592 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
593 cur_pid, my_pd->ownpid);
594 ret = -EINVAL;
595 goto query_mr_exit0;
596 }
597
598 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
599 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
600 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
601 ret = -EINVAL;
602 goto query_mr_exit0;
603 }
604
605 memset(mr_attr, 0, sizeof(struct ib_mr_attr));
606 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
607
608 h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
609 if (h_ret != H_SUCCESS) {
610 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lx mr=%p "
611 "hca_hndl=%lx mr_hndl=%lx lkey=%x",
612 h_ret, mr, shca->ipz_hca_handle.handle,
613 e_mr->ipz_mr_handle.handle, mr->lkey);
614 ret = ehca2ib_return_code(h_ret);
615 goto query_mr_exit1;
616 }
617 mr_attr->pd = mr->pd;
618 mr_attr->device_virt_addr = hipzout.vaddr;
619 mr_attr->size = hipzout.len;
620 mr_attr->lkey = hipzout.lkey;
621 mr_attr->rkey = hipzout.rkey;
622 ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
623
624 query_mr_exit1:
625 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
626 query_mr_exit0:
627 if (ret)
628 ehca_err(mr->device, "ret=%x mr=%p mr_attr=%p",
629 ret, mr, mr_attr);
630 return ret;
631 } /* end ehca_query_mr() */
632
633 /*----------------------------------------------------------------------*/
634
635 int ehca_dereg_mr(struct ib_mr *mr)
636 {
637 int ret = 0;
638 u64 h_ret;
639 struct ehca_shca *shca =
640 container_of(mr->device, struct ehca_shca, ib_device);
641 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
642 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
643 u32 cur_pid = current->tgid;
644
645 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
646 (my_pd->ownpid != cur_pid)) {
647 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
648 cur_pid, my_pd->ownpid);
649 ret = -EINVAL;
650 goto dereg_mr_exit0;
651 }
652
653 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
654 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
655 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
656 ret = -EINVAL;
657 goto dereg_mr_exit0;
658 } else if (e_mr == shca->maxmr) {
659 /* should be impossible, however reject to be sure */
660 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
661 "shca->maxmr=%p mr->lkey=%x",
662 mr, shca->maxmr, mr->lkey);
663 ret = -EINVAL;
664 goto dereg_mr_exit0;
665 }
666
667 /* TODO: BUSY: MR still has bound window(s) */
668 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
669 if (h_ret != H_SUCCESS) {
670 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lx shca=%p "
671 "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
672 h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
673 e_mr->ipz_mr_handle.handle, mr->lkey);
674 ret = ehca2ib_return_code(h_ret);
675 goto dereg_mr_exit0;
676 }
677
678 if (e_mr->umem)
679 ib_umem_release(e_mr->umem);
680
681 /* successful deregistration */
682 ehca_mr_delete(e_mr);
683
684 dereg_mr_exit0:
685 if (ret)
686 ehca_err(mr->device, "ret=%x mr=%p", ret, mr);
687 return ret;
688 } /* end ehca_dereg_mr() */
689
690 /*----------------------------------------------------------------------*/
691
692 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
693 {
694 struct ib_mw *ib_mw;
695 u64 h_ret;
696 struct ehca_mw *e_mw;
697 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
698 struct ehca_shca *shca =
699 container_of(pd->device, struct ehca_shca, ib_device);
700 struct ehca_mw_hipzout_parms hipzout;
701
702 e_mw = ehca_mw_new();
703 if (!e_mw) {
704 ib_mw = ERR_PTR(-ENOMEM);
705 goto alloc_mw_exit0;
706 }
707
708 h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
709 e_pd->fw_pd, &hipzout);
710 if (h_ret != H_SUCCESS) {
711 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lx "
712 "shca=%p hca_hndl=%lx mw=%p",
713 h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
714 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
715 goto alloc_mw_exit1;
716 }
717 /* successful MW allocation */
718 e_mw->ipz_mw_handle = hipzout.handle;
719 e_mw->ib_mw.rkey = hipzout.rkey;
720 return &e_mw->ib_mw;
721
722 alloc_mw_exit1:
723 ehca_mw_delete(e_mw);
724 alloc_mw_exit0:
725 if (IS_ERR(ib_mw))
726 ehca_err(pd->device, "rc=%lx pd=%p", PTR_ERR(ib_mw), pd);
727 return ib_mw;
728 } /* end ehca_alloc_mw() */
729
730 /*----------------------------------------------------------------------*/
731
732 int ehca_bind_mw(struct ib_qp *qp,
733 struct ib_mw *mw,
734 struct ib_mw_bind *mw_bind)
735 {
736 /* TODO: not supported up to now */
737 ehca_gen_err("bind MW currently not supported by HCAD");
738
739 return -EPERM;
740 } /* end ehca_bind_mw() */
741
742 /*----------------------------------------------------------------------*/
743
744 int ehca_dealloc_mw(struct ib_mw *mw)
745 {
746 u64 h_ret;
747 struct ehca_shca *shca =
748 container_of(mw->device, struct ehca_shca, ib_device);
749 struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
750
751 h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
752 if (h_ret != H_SUCCESS) {
753 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lx shca=%p "
754 "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
755 h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
756 e_mw->ipz_mw_handle.handle);
757 return ehca2ib_return_code(h_ret);
758 }
759 /* successful deallocation */
760 ehca_mw_delete(e_mw);
761 return 0;
762 } /* end ehca_dealloc_mw() */
763
764 /*----------------------------------------------------------------------*/
765
766 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
767 int mr_access_flags,
768 struct ib_fmr_attr *fmr_attr)
769 {
770 struct ib_fmr *ib_fmr;
771 struct ehca_shca *shca =
772 container_of(pd->device, struct ehca_shca, ib_device);
773 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
774 struct ehca_mr *e_fmr;
775 int ret;
776 u32 tmp_lkey, tmp_rkey;
777 struct ehca_mr_pginfo pginfo;
778 u64 hw_pgsize;
779
780 /* check other parameters */
781 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
782 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
783 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
784 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
785 /*
786 * Remote Write Access requires Local Write Access
787 * Remote Atomic Access requires Local Write Access
788 */
789 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
790 mr_access_flags);
791 ib_fmr = ERR_PTR(-EINVAL);
792 goto alloc_fmr_exit0;
793 }
794 if (mr_access_flags & IB_ACCESS_MW_BIND) {
795 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
796 mr_access_flags);
797 ib_fmr = ERR_PTR(-EINVAL);
798 goto alloc_fmr_exit0;
799 }
800 if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
801 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
802 "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
803 fmr_attr->max_pages, fmr_attr->max_maps,
804 fmr_attr->page_shift);
805 ib_fmr = ERR_PTR(-EINVAL);
806 goto alloc_fmr_exit0;
807 }
808 hw_pgsize = ehca_get_max_hwpage_size(shca);
809 if ((1 << fmr_attr->page_shift) != hw_pgsize) {
810 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
811 fmr_attr->page_shift);
812 ib_fmr = ERR_PTR(-EINVAL);
813 goto alloc_fmr_exit0;
814 }
815
816 e_fmr = ehca_mr_new();
817 if (!e_fmr) {
818 ib_fmr = ERR_PTR(-ENOMEM);
819 goto alloc_fmr_exit0;
820 }
821 e_fmr->flags |= EHCA_MR_FLAG_FMR;
822
823 /* register MR on HCA */
824 memset(&pginfo, 0, sizeof(pginfo));
825 /*
826 * pginfo.num_hwpages==0, ie register_rpages() will not be called
827 * but deferred to map_phys_fmr()
828 */
829 ret = ehca_reg_mr(shca, e_fmr, NULL,
830 fmr_attr->max_pages * (1 << fmr_attr->page_shift),
831 mr_access_flags, e_pd, &pginfo,
832 &tmp_lkey, &tmp_rkey);
833 if (ret) {
834 ib_fmr = ERR_PTR(ret);
835 goto alloc_fmr_exit1;
836 }
837
838 /* successful */
839 e_fmr->hwpage_size = hw_pgsize;
840 e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
841 e_fmr->fmr_max_pages = fmr_attr->max_pages;
842 e_fmr->fmr_max_maps = fmr_attr->max_maps;
843 e_fmr->fmr_map_cnt = 0;
844 return &e_fmr->ib.ib_fmr;
845
846 alloc_fmr_exit1:
847 ehca_mr_delete(e_fmr);
848 alloc_fmr_exit0:
849 if (IS_ERR(ib_fmr))
850 ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x "
851 "fmr_attr=%p", PTR_ERR(ib_fmr), pd,
852 mr_access_flags, fmr_attr);
853 return ib_fmr;
854 } /* end ehca_alloc_fmr() */
855
856 /*----------------------------------------------------------------------*/
857
858 int ehca_map_phys_fmr(struct ib_fmr *fmr,
859 u64 *page_list,
860 int list_len,
861 u64 iova)
862 {
863 int ret;
864 struct ehca_shca *shca =
865 container_of(fmr->device, struct ehca_shca, ib_device);
866 struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
867 struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
868 struct ehca_mr_pginfo pginfo;
869 u32 tmp_lkey, tmp_rkey;
870
871 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
872 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
873 e_fmr, e_fmr->flags);
874 ret = -EINVAL;
875 goto map_phys_fmr_exit0;
876 }
877 ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
878 if (ret)
879 goto map_phys_fmr_exit0;
880 if (iova % e_fmr->fmr_page_size) {
881 /* only whole-numbered pages */
882 ehca_err(fmr->device, "bad iova, iova=%lx fmr_page_size=%x",
883 iova, e_fmr->fmr_page_size);
884 ret = -EINVAL;
885 goto map_phys_fmr_exit0;
886 }
887 if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
888 /* HCAD does not limit the maps, however trace this anyway */
889 ehca_info(fmr->device, "map limit exceeded, fmr=%p "
890 "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
891 fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
892 }
893
894 memset(&pginfo, 0, sizeof(pginfo));
895 pginfo.type = EHCA_MR_PGI_FMR;
896 pginfo.num_kpages = list_len;
897 pginfo.hwpage_size = e_fmr->hwpage_size;
898 pginfo.num_hwpages =
899 list_len * e_fmr->fmr_page_size / pginfo.hwpage_size;
900 pginfo.u.fmr.page_list = page_list;
901 pginfo.next_hwpage =
902 (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size;
903 pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size;
904
905 ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova,
906 list_len * e_fmr->fmr_page_size,
907 e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
908 if (ret)
909 goto map_phys_fmr_exit0;
910
911 /* successful reregistration */
912 e_fmr->fmr_map_cnt++;
913 e_fmr->ib.ib_fmr.lkey = tmp_lkey;
914 e_fmr->ib.ib_fmr.rkey = tmp_rkey;
915 return 0;
916
917 map_phys_fmr_exit0:
918 if (ret)
919 ehca_err(fmr->device, "ret=%x fmr=%p page_list=%p list_len=%x "
920 "iova=%lx", ret, fmr, page_list, list_len, iova);
921 return ret;
922 } /* end ehca_map_phys_fmr() */
923
924 /*----------------------------------------------------------------------*/
925
926 int ehca_unmap_fmr(struct list_head *fmr_list)
927 {
928 int ret = 0;
929 struct ib_fmr *ib_fmr;
930 struct ehca_shca *shca = NULL;
931 struct ehca_shca *prev_shca;
932 struct ehca_mr *e_fmr;
933 u32 num_fmr = 0;
934 u32 unmap_fmr_cnt = 0;
935
936 /* check all FMR belong to same SHCA, and check internal flag */
937 list_for_each_entry(ib_fmr, fmr_list, list) {
938 prev_shca = shca;
939 if (!ib_fmr) {
940 ehca_gen_err("bad fmr=%p in list", ib_fmr);
941 ret = -EINVAL;
942 goto unmap_fmr_exit0;
943 }
944 shca = container_of(ib_fmr->device, struct ehca_shca,
945 ib_device);
946 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
947 if ((shca != prev_shca) && prev_shca) {
948 ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
949 "prev_shca=%p e_fmr=%p",
950 shca, prev_shca, e_fmr);
951 ret = -EINVAL;
952 goto unmap_fmr_exit0;
953 }
954 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
955 ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
956 "e_fmr->flags=%x", e_fmr, e_fmr->flags);
957 ret = -EINVAL;
958 goto unmap_fmr_exit0;
959 }
960 num_fmr++;
961 }
962
963 /* loop over all FMRs to unmap */
964 list_for_each_entry(ib_fmr, fmr_list, list) {
965 unmap_fmr_cnt++;
966 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
967 shca = container_of(ib_fmr->device, struct ehca_shca,
968 ib_device);
969 ret = ehca_unmap_one_fmr(shca, e_fmr);
970 if (ret) {
971 /* unmap failed, stop unmapping of rest of FMRs */
972 ehca_err(&shca->ib_device, "unmap of one FMR failed, "
973 "stop rest, e_fmr=%p num_fmr=%x "
974 "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
975 unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
976 goto unmap_fmr_exit0;
977 }
978 }
979
980 unmap_fmr_exit0:
981 if (ret)
982 ehca_gen_err("ret=%x fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
983 ret, fmr_list, num_fmr, unmap_fmr_cnt);
984 return ret;
985 } /* end ehca_unmap_fmr() */
986
987 /*----------------------------------------------------------------------*/
988
989 int ehca_dealloc_fmr(struct ib_fmr *fmr)
990 {
991 int ret;
992 u64 h_ret;
993 struct ehca_shca *shca =
994 container_of(fmr->device, struct ehca_shca, ib_device);
995 struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
996
997 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
998 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
999 e_fmr, e_fmr->flags);
1000 ret = -EINVAL;
1001 goto free_fmr_exit0;
1002 }
1003
1004 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1005 if (h_ret != H_SUCCESS) {
1006 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lx e_fmr=%p "
1007 "hca_hndl=%lx fmr_hndl=%lx fmr->lkey=%x",
1008 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1009 e_fmr->ipz_mr_handle.handle, fmr->lkey);
1010 ret = ehca2ib_return_code(h_ret);
1011 goto free_fmr_exit0;
1012 }
1013 /* successful deregistration */
1014 ehca_mr_delete(e_fmr);
1015 return 0;
1016
1017 free_fmr_exit0:
1018 if (ret)
1019 ehca_err(&shca->ib_device, "ret=%x fmr=%p", ret, fmr);
1020 return ret;
1021 } /* end ehca_dealloc_fmr() */
1022
1023 /*----------------------------------------------------------------------*/
1024
1025 int ehca_reg_mr(struct ehca_shca *shca,
1026 struct ehca_mr *e_mr,
1027 u64 *iova_start,
1028 u64 size,
1029 int acl,
1030 struct ehca_pd *e_pd,
1031 struct ehca_mr_pginfo *pginfo,
1032 u32 *lkey, /*OUT*/
1033 u32 *rkey) /*OUT*/
1034 {
1035 int ret;
1036 u64 h_ret;
1037 u32 hipz_acl;
1038 struct ehca_mr_hipzout_parms hipzout;
1039
1040 ehca_mrmw_map_acl(acl, &hipz_acl);
1041 ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1042 if (ehca_use_hp_mr == 1)
1043 hipz_acl |= 0x00000001;
1044
1045 h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
1046 (u64)iova_start, size, hipz_acl,
1047 e_pd->fw_pd, &hipzout);
1048 if (h_ret != H_SUCCESS) {
1049 ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%lx "
1050 "hca_hndl=%lx", h_ret, shca->ipz_hca_handle.handle);
1051 ret = ehca2ib_return_code(h_ret);
1052 goto ehca_reg_mr_exit0;
1053 }
1054
1055 e_mr->ipz_mr_handle = hipzout.handle;
1056
1057 ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1058 if (ret)
1059 goto ehca_reg_mr_exit1;
1060
1061 /* successful registration */
1062 e_mr->num_kpages = pginfo->num_kpages;
1063 e_mr->num_hwpages = pginfo->num_hwpages;
1064 e_mr->hwpage_size = pginfo->hwpage_size;
1065 e_mr->start = iova_start;
1066 e_mr->size = size;
1067 e_mr->acl = acl;
1068 *lkey = hipzout.lkey;
1069 *rkey = hipzout.rkey;
1070 return 0;
1071
1072 ehca_reg_mr_exit1:
1073 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1074 if (h_ret != H_SUCCESS) {
1075 ehca_err(&shca->ib_device, "h_ret=%lx shca=%p e_mr=%p "
1076 "iova_start=%p size=%lx acl=%x e_pd=%p lkey=%x "
1077 "pginfo=%p num_kpages=%lx num_hwpages=%lx ret=%x",
1078 h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1079 hipzout.lkey, pginfo, pginfo->num_kpages,
1080 pginfo->num_hwpages, ret);
1081 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1082 "not recoverable");
1083 }
1084 ehca_reg_mr_exit0:
1085 if (ret)
1086 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
1087 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1088 "num_kpages=%lx num_hwpages=%lx",
1089 ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1090 pginfo->num_kpages, pginfo->num_hwpages);
1091 return ret;
1092 } /* end ehca_reg_mr() */
1093
1094 /*----------------------------------------------------------------------*/
1095
1096 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1097 struct ehca_mr *e_mr,
1098 struct ehca_mr_pginfo *pginfo)
1099 {
1100 int ret = 0;
1101 u64 h_ret;
1102 u32 rnum;
1103 u64 rpage;
1104 u32 i;
1105 u64 *kpage;
1106
1107 if (!pginfo->num_hwpages) /* in case of fmr */
1108 return 0;
1109
1110 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1111 if (!kpage) {
1112 ehca_err(&shca->ib_device, "kpage alloc failed");
1113 ret = -ENOMEM;
1114 goto ehca_reg_mr_rpages_exit0;
1115 }
1116
1117 /* max MAX_RPAGES ehca mr pages per register call */
1118 for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1119
1120 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1121 rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1122 if (rnum == 0)
1123 rnum = MAX_RPAGES; /* last shot is full */
1124 } else
1125 rnum = MAX_RPAGES;
1126
1127 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1128 if (ret) {
1129 ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1130 "bad rc, ret=%x rnum=%x kpage=%p",
1131 ret, rnum, kpage);
1132 goto ehca_reg_mr_rpages_exit1;
1133 }
1134
1135 if (rnum > 1) {
1136 rpage = virt_to_abs(kpage);
1137 if (!rpage) {
1138 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1139 kpage, i);
1140 ret = -EFAULT;
1141 goto ehca_reg_mr_rpages_exit1;
1142 }
1143 } else
1144 rpage = *kpage;
1145
1146 h_ret = hipz_h_register_rpage_mr(
1147 shca->ipz_hca_handle, e_mr,
1148 ehca_encode_hwpage_size(pginfo->hwpage_size),
1149 0, rpage, rnum);
1150
1151 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1152 /*
1153 * check for 'registration complete'==H_SUCCESS
1154 * and for 'page registered'==H_PAGE_REGISTERED
1155 */
1156 if (h_ret != H_SUCCESS) {
1157 ehca_err(&shca->ib_device, "last "
1158 "hipz_reg_rpage_mr failed, h_ret=%lx "
1159 "e_mr=%p i=%x hca_hndl=%lx mr_hndl=%lx"
1160 " lkey=%x", h_ret, e_mr, i,
1161 shca->ipz_hca_handle.handle,
1162 e_mr->ipz_mr_handle.handle,
1163 e_mr->ib.ib_mr.lkey);
1164 ret = ehca2ib_return_code(h_ret);
1165 break;
1166 } else
1167 ret = 0;
1168 } else if (h_ret != H_PAGE_REGISTERED) {
1169 ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1170 "h_ret=%lx e_mr=%p i=%x lkey=%x hca_hndl=%lx "
1171 "mr_hndl=%lx", h_ret, e_mr, i,
1172 e_mr->ib.ib_mr.lkey,
1173 shca->ipz_hca_handle.handle,
1174 e_mr->ipz_mr_handle.handle);
1175 ret = ehca2ib_return_code(h_ret);
1176 break;
1177 } else
1178 ret = 0;
1179 } /* end for(i) */
1180
1181
1182 ehca_reg_mr_rpages_exit1:
1183 ehca_free_fw_ctrlblock(kpage);
1184 ehca_reg_mr_rpages_exit0:
1185 if (ret)
1186 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p pginfo=%p "
1187 "num_kpages=%lx num_hwpages=%lx", ret, shca, e_mr,
1188 pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1189 return ret;
1190 } /* end ehca_reg_mr_rpages() */
1191
1192 /*----------------------------------------------------------------------*/
1193
1194 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1195 struct ehca_mr *e_mr,
1196 u64 *iova_start,
1197 u64 size,
1198 u32 acl,
1199 struct ehca_pd *e_pd,
1200 struct ehca_mr_pginfo *pginfo,
1201 u32 *lkey, /*OUT*/
1202 u32 *rkey) /*OUT*/
1203 {
1204 int ret;
1205 u64 h_ret;
1206 u32 hipz_acl;
1207 u64 *kpage;
1208 u64 rpage;
1209 struct ehca_mr_pginfo pginfo_save;
1210 struct ehca_mr_hipzout_parms hipzout;
1211
1212 ehca_mrmw_map_acl(acl, &hipz_acl);
1213 ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1214
1215 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1216 if (!kpage) {
1217 ehca_err(&shca->ib_device, "kpage alloc failed");
1218 ret = -ENOMEM;
1219 goto ehca_rereg_mr_rereg1_exit0;
1220 }
1221
1222 pginfo_save = *pginfo;
1223 ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1224 if (ret) {
1225 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1226 "pginfo=%p type=%x num_kpages=%lx num_hwpages=%lx "
1227 "kpage=%p", e_mr, pginfo, pginfo->type,
1228 pginfo->num_kpages, pginfo->num_hwpages, kpage);
1229 goto ehca_rereg_mr_rereg1_exit1;
1230 }
1231 rpage = virt_to_abs(kpage);
1232 if (!rpage) {
1233 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1234 ret = -EFAULT;
1235 goto ehca_rereg_mr_rereg1_exit1;
1236 }
1237 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1238 (u64)iova_start, size, hipz_acl,
1239 e_pd->fw_pd, rpage, &hipzout);
1240 if (h_ret != H_SUCCESS) {
1241 /*
1242 * reregistration unsuccessful, try it again with the 3 hCalls,
1243 * e.g. this is required in case H_MR_CONDITION
1244 * (MW bound or MR is shared)
1245 */
1246 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1247 "(Rereg1), h_ret=%lx e_mr=%p", h_ret, e_mr);
1248 *pginfo = pginfo_save;
1249 ret = -EAGAIN;
1250 } else if ((u64 *)hipzout.vaddr != iova_start) {
1251 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1252 "rereg_pmr, iova_start=%p iova_start_out=%lx e_mr=%p "
1253 "mr_handle=%lx lkey=%x lkey_out=%x", iova_start,
1254 hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1255 e_mr->ib.ib_mr.lkey, hipzout.lkey);
1256 ret = -EFAULT;
1257 } else {
1258 /*
1259 * successful reregistration
1260 * note: start and start_out are identical for eServer HCAs
1261 */
1262 e_mr->num_kpages = pginfo->num_kpages;
1263 e_mr->num_hwpages = pginfo->num_hwpages;
1264 e_mr->hwpage_size = pginfo->hwpage_size;
1265 e_mr->start = iova_start;
1266 e_mr->size = size;
1267 e_mr->acl = acl;
1268 *lkey = hipzout.lkey;
1269 *rkey = hipzout.rkey;
1270 }
1271
1272 ehca_rereg_mr_rereg1_exit1:
1273 ehca_free_fw_ctrlblock(kpage);
1274 ehca_rereg_mr_rereg1_exit0:
1275 if ( ret && (ret != -EAGAIN) )
1276 ehca_err(&shca->ib_device, "ret=%x lkey=%x rkey=%x "
1277 "pginfo=%p num_kpages=%lx num_hwpages=%lx",
1278 ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1279 pginfo->num_hwpages);
1280 return ret;
1281 } /* end ehca_rereg_mr_rereg1() */
1282
1283 /*----------------------------------------------------------------------*/
1284
1285 int ehca_rereg_mr(struct ehca_shca *shca,
1286 struct ehca_mr *e_mr,
1287 u64 *iova_start,
1288 u64 size,
1289 int acl,
1290 struct ehca_pd *e_pd,
1291 struct ehca_mr_pginfo *pginfo,
1292 u32 *lkey,
1293 u32 *rkey)
1294 {
1295 int ret = 0;
1296 u64 h_ret;
1297 int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1298 int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1299
1300 /* first determine reregistration hCall(s) */
1301 if ((pginfo->num_hwpages > MAX_RPAGES) ||
1302 (e_mr->num_hwpages > MAX_RPAGES) ||
1303 (pginfo->num_hwpages > e_mr->num_hwpages)) {
1304 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1305 "pginfo->num_hwpages=%lx e_mr->num_hwpages=%x",
1306 pginfo->num_hwpages, e_mr->num_hwpages);
1307 rereg_1_hcall = 0;
1308 rereg_3_hcall = 1;
1309 }
1310
1311 if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1312 rereg_1_hcall = 0;
1313 rereg_3_hcall = 1;
1314 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1315 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1316 e_mr);
1317 }
1318
1319 if (rereg_1_hcall) {
1320 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1321 acl, e_pd, pginfo, lkey, rkey);
1322 if (ret) {
1323 if (ret == -EAGAIN)
1324 rereg_3_hcall = 1;
1325 else
1326 goto ehca_rereg_mr_exit0;
1327 }
1328 }
1329
1330 if (rereg_3_hcall) {
1331 struct ehca_mr save_mr;
1332
1333 /* first deregister old MR */
1334 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1335 if (h_ret != H_SUCCESS) {
1336 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1337 "h_ret=%lx e_mr=%p hca_hndl=%lx mr_hndl=%lx "
1338 "mr->lkey=%x",
1339 h_ret, e_mr, shca->ipz_hca_handle.handle,
1340 e_mr->ipz_mr_handle.handle,
1341 e_mr->ib.ib_mr.lkey);
1342 ret = ehca2ib_return_code(h_ret);
1343 goto ehca_rereg_mr_exit0;
1344 }
1345 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1346 save_mr = *e_mr;
1347 ehca_mr_deletenew(e_mr);
1348
1349 /* set some MR values */
1350 e_mr->flags = save_mr.flags;
1351 e_mr->hwpage_size = save_mr.hwpage_size;
1352 e_mr->fmr_page_size = save_mr.fmr_page_size;
1353 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1354 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1355 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1356
1357 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1358 e_pd, pginfo, lkey, rkey);
1359 if (ret) {
1360 u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1361 memcpy(&e_mr->flags, &(save_mr.flags),
1362 sizeof(struct ehca_mr) - offset);
1363 goto ehca_rereg_mr_exit0;
1364 }
1365 }
1366
1367 ehca_rereg_mr_exit0:
1368 if (ret)
1369 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
1370 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1371 "num_kpages=%lx lkey=%x rkey=%x rereg_1_hcall=%x "
1372 "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1373 acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1374 rereg_1_hcall, rereg_3_hcall);
1375 return ret;
1376 } /* end ehca_rereg_mr() */
1377
1378 /*----------------------------------------------------------------------*/
1379
1380 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1381 struct ehca_mr *e_fmr)
1382 {
1383 int ret = 0;
1384 u64 h_ret;
1385 struct ehca_pd *e_pd =
1386 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1387 struct ehca_mr save_fmr;
1388 u32 tmp_lkey, tmp_rkey;
1389 struct ehca_mr_pginfo pginfo;
1390 struct ehca_mr_hipzout_parms hipzout;
1391 struct ehca_mr save_mr;
1392
1393 if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1394 /*
1395 * note: after using rereg hcall with len=0,
1396 * rereg hcall must be used again for registering pages
1397 */
1398 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1399 0, 0, e_pd->fw_pd, 0, &hipzout);
1400 if (h_ret == H_SUCCESS) {
1401 /* successful reregistration */
1402 e_fmr->start = NULL;
1403 e_fmr->size = 0;
1404 tmp_lkey = hipzout.lkey;
1405 tmp_rkey = hipzout.rkey;
1406 return 0;
1407 }
1408 /*
1409 * should not happen, because length checked above,
1410 * FMRs are not shared and no MW bound to FMRs
1411 */
1412 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1413 "(Rereg1), h_ret=%lx e_fmr=%p hca_hndl=%lx "
1414 "mr_hndl=%lx lkey=%x lkey_out=%x",
1415 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1416 e_fmr->ipz_mr_handle.handle,
1417 e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1418 /* try free and rereg */
1419 }
1420
1421 /* first free old FMR */
1422 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1423 if (h_ret != H_SUCCESS) {
1424 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1425 "h_ret=%lx e_fmr=%p hca_hndl=%lx mr_hndl=%lx "
1426 "lkey=%x",
1427 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1428 e_fmr->ipz_mr_handle.handle,
1429 e_fmr->ib.ib_fmr.lkey);
1430 ret = ehca2ib_return_code(h_ret);
1431 goto ehca_unmap_one_fmr_exit0;
1432 }
1433 /* clean ehca_mr_t, without changing lock */
1434 save_fmr = *e_fmr;
1435 ehca_mr_deletenew(e_fmr);
1436
1437 /* set some MR values */
1438 e_fmr->flags = save_fmr.flags;
1439 e_fmr->hwpage_size = save_fmr.hwpage_size;
1440 e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1441 e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1442 e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1443 e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1444 e_fmr->acl = save_fmr.acl;
1445
1446 memset(&pginfo, 0, sizeof(pginfo));
1447 pginfo.type = EHCA_MR_PGI_FMR;
1448 ret = ehca_reg_mr(shca, e_fmr, NULL,
1449 (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1450 e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1451 &tmp_rkey);
1452 if (ret) {
1453 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1454 memcpy(&e_fmr->flags, &(save_mr.flags),
1455 sizeof(struct ehca_mr) - offset);
1456 }
1457
1458 ehca_unmap_one_fmr_exit0:
1459 if (ret)
1460 ehca_err(&shca->ib_device, "ret=%x tmp_lkey=%x tmp_rkey=%x "
1461 "fmr_max_pages=%x",
1462 ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1463 return ret;
1464 } /* end ehca_unmap_one_fmr() */
1465
1466 /*----------------------------------------------------------------------*/
1467
1468 int ehca_reg_smr(struct ehca_shca *shca,
1469 struct ehca_mr *e_origmr,
1470 struct ehca_mr *e_newmr,
1471 u64 *iova_start,
1472 int acl,
1473 struct ehca_pd *e_pd,
1474 u32 *lkey, /*OUT*/
1475 u32 *rkey) /*OUT*/
1476 {
1477 int ret = 0;
1478 u64 h_ret;
1479 u32 hipz_acl;
1480 struct ehca_mr_hipzout_parms hipzout;
1481
1482 ehca_mrmw_map_acl(acl, &hipz_acl);
1483 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1484
1485 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1486 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1487 &hipzout);
1488 if (h_ret != H_SUCCESS) {
1489 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
1490 "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1491 "e_pd=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1492 h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1493 shca->ipz_hca_handle.handle,
1494 e_origmr->ipz_mr_handle.handle,
1495 e_origmr->ib.ib_mr.lkey);
1496 ret = ehca2ib_return_code(h_ret);
1497 goto ehca_reg_smr_exit0;
1498 }
1499 /* successful registration */
1500 e_newmr->num_kpages = e_origmr->num_kpages;
1501 e_newmr->num_hwpages = e_origmr->num_hwpages;
1502 e_newmr->hwpage_size = e_origmr->hwpage_size;
1503 e_newmr->start = iova_start;
1504 e_newmr->size = e_origmr->size;
1505 e_newmr->acl = acl;
1506 e_newmr->ipz_mr_handle = hipzout.handle;
1507 *lkey = hipzout.lkey;
1508 *rkey = hipzout.rkey;
1509 return 0;
1510
1511 ehca_reg_smr_exit0:
1512 if (ret)
1513 ehca_err(&shca->ib_device, "ret=%x shca=%p e_origmr=%p "
1514 "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1515 ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1516 return ret;
1517 } /* end ehca_reg_smr() */
1518
1519 /*----------------------------------------------------------------------*/
1520
1521 /* register internal max-MR to internal SHCA */
1522 int ehca_reg_internal_maxmr(
1523 struct ehca_shca *shca,
1524 struct ehca_pd *e_pd,
1525 struct ehca_mr **e_maxmr) /*OUT*/
1526 {
1527 int ret;
1528 struct ehca_mr *e_mr;
1529 u64 *iova_start;
1530 u64 size_maxmr;
1531 struct ehca_mr_pginfo pginfo;
1532 struct ib_phys_buf ib_pbuf;
1533 u32 num_kpages;
1534 u32 num_hwpages;
1535 u64 hw_pgsize;
1536
1537 e_mr = ehca_mr_new();
1538 if (!e_mr) {
1539 ehca_err(&shca->ib_device, "out of memory");
1540 ret = -ENOMEM;
1541 goto ehca_reg_internal_maxmr_exit0;
1542 }
1543 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1544
1545 /* register internal max-MR on HCA */
1546 size_maxmr = (u64)high_memory - PAGE_OFFSET;
1547 iova_start = (u64 *)KERNELBASE;
1548 ib_pbuf.addr = 0;
1549 ib_pbuf.size = size_maxmr;
1550 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1551 PAGE_SIZE);
1552 hw_pgsize = ehca_get_max_hwpage_size(shca);
1553 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1554 hw_pgsize);
1555
1556 memset(&pginfo, 0, sizeof(pginfo));
1557 pginfo.type = EHCA_MR_PGI_PHYS;
1558 pginfo.num_kpages = num_kpages;
1559 pginfo.num_hwpages = num_hwpages;
1560 pginfo.hwpage_size = hw_pgsize;
1561 pginfo.u.phy.num_phys_buf = 1;
1562 pginfo.u.phy.phys_buf_array = &ib_pbuf;
1563
1564 ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1565 &pginfo, &e_mr->ib.ib_mr.lkey,
1566 &e_mr->ib.ib_mr.rkey);
1567 if (ret) {
1568 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1569 "e_mr=%p iova_start=%p size_maxmr=%lx num_kpages=%x "
1570 "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1571 num_kpages, num_hwpages);
1572 goto ehca_reg_internal_maxmr_exit1;
1573 }
1574
1575 /* successful registration of all pages */
1576 e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1577 e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1578 e_mr->ib.ib_mr.uobject = NULL;
1579 atomic_inc(&(e_pd->ib_pd.usecnt));
1580 atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1581 *e_maxmr = e_mr;
1582 return 0;
1583
1584 ehca_reg_internal_maxmr_exit1:
1585 ehca_mr_delete(e_mr);
1586 ehca_reg_internal_maxmr_exit0:
1587 if (ret)
1588 ehca_err(&shca->ib_device, "ret=%x shca=%p e_pd=%p e_maxmr=%p",
1589 ret, shca, e_pd, e_maxmr);
1590 return ret;
1591 } /* end ehca_reg_internal_maxmr() */
1592
1593 /*----------------------------------------------------------------------*/
1594
1595 int ehca_reg_maxmr(struct ehca_shca *shca,
1596 struct ehca_mr *e_newmr,
1597 u64 *iova_start,
1598 int acl,
1599 struct ehca_pd *e_pd,
1600 u32 *lkey,
1601 u32 *rkey)
1602 {
1603 u64 h_ret;
1604 struct ehca_mr *e_origmr = shca->maxmr;
1605 u32 hipz_acl;
1606 struct ehca_mr_hipzout_parms hipzout;
1607
1608 ehca_mrmw_map_acl(acl, &hipz_acl);
1609 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1610
1611 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1612 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1613 &hipzout);
1614 if (h_ret != H_SUCCESS) {
1615 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
1616 "e_origmr=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1617 h_ret, e_origmr, shca->ipz_hca_handle.handle,
1618 e_origmr->ipz_mr_handle.handle,
1619 e_origmr->ib.ib_mr.lkey);
1620 return ehca2ib_return_code(h_ret);
1621 }
1622 /* successful registration */
1623 e_newmr->num_kpages = e_origmr->num_kpages;
1624 e_newmr->num_hwpages = e_origmr->num_hwpages;
1625 e_newmr->hwpage_size = e_origmr->hwpage_size;
1626 e_newmr->start = iova_start;
1627 e_newmr->size = e_origmr->size;
1628 e_newmr->acl = acl;
1629 e_newmr->ipz_mr_handle = hipzout.handle;
1630 *lkey = hipzout.lkey;
1631 *rkey = hipzout.rkey;
1632 return 0;
1633 } /* end ehca_reg_maxmr() */
1634
1635 /*----------------------------------------------------------------------*/
1636
1637 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1638 {
1639 int ret;
1640 struct ehca_mr *e_maxmr;
1641 struct ib_pd *ib_pd;
1642
1643 if (!shca->maxmr) {
1644 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1645 ret = -EINVAL;
1646 goto ehca_dereg_internal_maxmr_exit0;
1647 }
1648
1649 e_maxmr = shca->maxmr;
1650 ib_pd = e_maxmr->ib.ib_mr.pd;
1651 shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1652
1653 ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1654 if (ret) {
1655 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1656 "ret=%x e_maxmr=%p shca=%p lkey=%x",
1657 ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1658 shca->maxmr = e_maxmr;
1659 goto ehca_dereg_internal_maxmr_exit0;
1660 }
1661
1662 atomic_dec(&ib_pd->usecnt);
1663
1664 ehca_dereg_internal_maxmr_exit0:
1665 if (ret)
1666 ehca_err(&shca->ib_device, "ret=%x shca=%p shca->maxmr=%p",
1667 ret, shca, shca->maxmr);
1668 return ret;
1669 } /* end ehca_dereg_internal_maxmr() */
1670
1671 /*----------------------------------------------------------------------*/
1672
1673 /*
1674 * check physical buffer array of MR verbs for validness and
1675 * calculates MR size
1676 */
1677 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1678 int num_phys_buf,
1679 u64 *iova_start,
1680 u64 *size)
1681 {
1682 struct ib_phys_buf *pbuf = phys_buf_array;
1683 u64 size_count = 0;
1684 u32 i;
1685
1686 if (num_phys_buf == 0) {
1687 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1688 return -EINVAL;
1689 }
1690 /* check first buffer */
1691 if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1692 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1693 "pbuf->addr=%lx pbuf->size=%lx",
1694 iova_start, pbuf->addr, pbuf->size);
1695 return -EINVAL;
1696 }
1697 if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1698 (num_phys_buf > 1)) {
1699 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%lx "
1700 "pbuf->size=%lx", pbuf->addr, pbuf->size);
1701 return -EINVAL;
1702 }
1703
1704 for (i = 0; i < num_phys_buf; i++) {
1705 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1706 ehca_gen_err("bad address, i=%x pbuf->addr=%lx "
1707 "pbuf->size=%lx",
1708 i, pbuf->addr, pbuf->size);
1709 return -EINVAL;
1710 }
1711 if (((i > 0) && /* not 1st */
1712 (i < (num_phys_buf - 1)) && /* not last */
1713 (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1714 ehca_gen_err("bad size, i=%x pbuf->size=%lx",
1715 i, pbuf->size);
1716 return -EINVAL;
1717 }
1718 size_count += pbuf->size;
1719 pbuf++;
1720 }
1721
1722 *size = size_count;
1723 return 0;
1724 } /* end ehca_mr_chk_buf_and_calc_size() */
1725
1726 /*----------------------------------------------------------------------*/
1727
1728 /* check page list of map FMR verb for validness */
1729 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1730 u64 *page_list,
1731 int list_len)
1732 {
1733 u32 i;
1734 u64 *page;
1735
1736 if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1737 ehca_gen_err("bad list_len, list_len=%x "
1738 "e_fmr->fmr_max_pages=%x fmr=%p",
1739 list_len, e_fmr->fmr_max_pages, e_fmr);
1740 return -EINVAL;
1741 }
1742
1743 /* each page must be aligned */
1744 page = page_list;
1745 for (i = 0; i < list_len; i++) {
1746 if (*page % e_fmr->fmr_page_size) {
1747 ehca_gen_err("bad page, i=%x *page=%lx page=%p fmr=%p "
1748 "fmr_page_size=%x", i, *page, page, e_fmr,
1749 e_fmr->fmr_page_size);
1750 return -EINVAL;
1751 }
1752 page++;
1753 }
1754
1755 return 0;
1756 } /* end ehca_fmr_check_page_list() */
1757
1758 /*----------------------------------------------------------------------*/
1759
1760 /* PAGE_SIZE >= pginfo->hwpage_size */
1761 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1762 u32 number,
1763 u64 *kpage)
1764 {
1765 int ret = 0;
1766 struct ib_umem_chunk *prev_chunk;
1767 struct ib_umem_chunk *chunk;
1768 u64 pgaddr;
1769 u32 i = 0;
1770 u32 j = 0;
1771 int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1772
1773 /* loop over desired chunk entries */
1774 chunk = pginfo->u.usr.next_chunk;
1775 prev_chunk = pginfo->u.usr.next_chunk;
1776 list_for_each_entry_continue(
1777 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1778 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1779 pgaddr = page_to_pfn(chunk->page_list[i].page)
1780 << PAGE_SHIFT ;
1781 *kpage = phys_to_abs(pgaddr +
1782 (pginfo->next_hwpage *
1783 pginfo->hwpage_size));
1784 if ( !(*kpage) ) {
1785 ehca_gen_err("pgaddr=%lx "
1786 "chunk->page_list[i]=%lx "
1787 "i=%x next_hwpage=%lx",
1788 pgaddr, (u64)sg_dma_address(
1789 &chunk->page_list[i]),
1790 i, pginfo->next_hwpage);
1791 return -EFAULT;
1792 }
1793 (pginfo->hwpage_cnt)++;
1794 (pginfo->next_hwpage)++;
1795 kpage++;
1796 if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1797 (pginfo->kpage_cnt)++;
1798 (pginfo->u.usr.next_nmap)++;
1799 pginfo->next_hwpage = 0;
1800 i++;
1801 }
1802 j++;
1803 if (j >= number) break;
1804 }
1805 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1806 (j >= number)) {
1807 pginfo->u.usr.next_nmap = 0;
1808 prev_chunk = chunk;
1809 break;
1810 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1811 pginfo->u.usr.next_nmap = 0;
1812 prev_chunk = chunk;
1813 } else if (j >= number)
1814 break;
1815 else
1816 prev_chunk = chunk;
1817 }
1818 pginfo->u.usr.next_chunk =
1819 list_prepare_entry(prev_chunk,
1820 (&(pginfo->u.usr.region->chunk_list)),
1821 list);
1822 return ret;
1823 }
1824
1825 /*
1826 * check given pages for contiguous layout
1827 * last page addr is returned in prev_pgaddr for further check
1828 */
1829 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1830 int start_idx, int end_idx,
1831 u64 *prev_pgaddr)
1832 {
1833 int t;
1834 for (t = start_idx; t <= end_idx; t++) {
1835 u64 pgaddr = page_to_pfn(page_list[t].page) << PAGE_SHIFT;
1836 ehca_gen_dbg("chunk_page=%lx value=%016lx", pgaddr,
1837 *(u64 *)abs_to_virt(phys_to_abs(pgaddr)));
1838 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1839 ehca_gen_err("uncontiguous page found pgaddr=%lx "
1840 "prev_pgaddr=%lx page_list_i=%x",
1841 pgaddr, *prev_pgaddr, t);
1842 return -EINVAL;
1843 }
1844 *prev_pgaddr = pgaddr;
1845 }
1846 return 0;
1847 }
1848
1849 /* PAGE_SIZE < pginfo->hwpage_size */
1850 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1851 u32 number,
1852 u64 *kpage)
1853 {
1854 int ret = 0;
1855 struct ib_umem_chunk *prev_chunk;
1856 struct ib_umem_chunk *chunk;
1857 u64 pgaddr, prev_pgaddr;
1858 u32 i = 0;
1859 u32 j = 0;
1860 int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1861 int nr_kpages = kpages_per_hwpage;
1862
1863 /* loop over desired chunk entries */
1864 chunk = pginfo->u.usr.next_chunk;
1865 prev_chunk = pginfo->u.usr.next_chunk;
1866 list_for_each_entry_continue(
1867 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1868 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1869 if (nr_kpages == kpages_per_hwpage) {
1870 pgaddr = ( page_to_pfn(chunk->page_list[i].page)
1871 << PAGE_SHIFT );
1872 *kpage = phys_to_abs(pgaddr);
1873 if ( !(*kpage) ) {
1874 ehca_gen_err("pgaddr=%lx i=%x",
1875 pgaddr, i);
1876 ret = -EFAULT;
1877 return ret;
1878 }
1879 /*
1880 * The first page in a hwpage must be aligned;
1881 * the first MR page is exempt from this rule.
1882 */
1883 if (pgaddr & (pginfo->hwpage_size - 1)) {
1884 if (pginfo->hwpage_cnt) {
1885 ehca_gen_err(
1886 "invalid alignment "
1887 "pgaddr=%lx i=%x "
1888 "mr_pgsize=%lx",
1889 pgaddr, i,
1890 pginfo->hwpage_size);
1891 ret = -EFAULT;
1892 return ret;
1893 }
1894 /* first MR page */
1895 pginfo->kpage_cnt =
1896 (pgaddr &
1897 (pginfo->hwpage_size - 1)) >>
1898 PAGE_SHIFT;
1899 nr_kpages -= pginfo->kpage_cnt;
1900 *kpage = phys_to_abs(
1901 pgaddr &
1902 ~(pginfo->hwpage_size - 1));
1903 }
1904 ehca_gen_dbg("kpage=%lx chunk_page=%lx "
1905 "value=%016lx", *kpage, pgaddr,
1906 *(u64 *)abs_to_virt(
1907 phys_to_abs(pgaddr)));
1908 prev_pgaddr = pgaddr;
1909 i++;
1910 pginfo->kpage_cnt++;
1911 pginfo->u.usr.next_nmap++;
1912 nr_kpages--;
1913 if (!nr_kpages)
1914 goto next_kpage;
1915 continue;
1916 }
1917 if (i + nr_kpages > chunk->nmap) {
1918 ret = ehca_check_kpages_per_ate(
1919 chunk->page_list, i,
1920 chunk->nmap - 1, &prev_pgaddr);
1921 if (ret) return ret;
1922 pginfo->kpage_cnt += chunk->nmap - i;
1923 pginfo->u.usr.next_nmap += chunk->nmap - i;
1924 nr_kpages -= chunk->nmap - i;
1925 break;
1926 }
1927
1928 ret = ehca_check_kpages_per_ate(chunk->page_list, i,
1929 i + nr_kpages - 1,
1930 &prev_pgaddr);
1931 if (ret) return ret;
1932 i += nr_kpages;
1933 pginfo->kpage_cnt += nr_kpages;
1934 pginfo->u.usr.next_nmap += nr_kpages;
1935 next_kpage:
1936 nr_kpages = kpages_per_hwpage;
1937 (pginfo->hwpage_cnt)++;
1938 kpage++;
1939 j++;
1940 if (j >= number) break;
1941 }
1942 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1943 (j >= number)) {
1944 pginfo->u.usr.next_nmap = 0;
1945 prev_chunk = chunk;
1946 break;
1947 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1948 pginfo->u.usr.next_nmap = 0;
1949 prev_chunk = chunk;
1950 } else if (j >= number)
1951 break;
1952 else
1953 prev_chunk = chunk;
1954 }
1955 pginfo->u.usr.next_chunk =
1956 list_prepare_entry(prev_chunk,
1957 (&(pginfo->u.usr.region->chunk_list)),
1958 list);
1959 return ret;
1960 }
1961
1962 int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
1963 u32 number,
1964 u64 *kpage)
1965 {
1966 int ret = 0;
1967 struct ib_phys_buf *pbuf;
1968 u64 num_hw, offs_hw;
1969 u32 i = 0;
1970
1971 /* loop over desired phys_buf_array entries */
1972 while (i < number) {
1973 pbuf = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
1974 num_hw = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
1975 pbuf->size, pginfo->hwpage_size);
1976 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
1977 pginfo->hwpage_size;
1978 while (pginfo->next_hwpage < offs_hw + num_hw) {
1979 /* sanity check */
1980 if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
1981 (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
1982 ehca_gen_err("kpage_cnt >= num_kpages, "
1983 "kpage_cnt=%lx num_kpages=%lx "
1984 "hwpage_cnt=%lx "
1985 "num_hwpages=%lx i=%x",
1986 pginfo->kpage_cnt,
1987 pginfo->num_kpages,
1988 pginfo->hwpage_cnt,
1989 pginfo->num_hwpages, i);
1990 return -EFAULT;
1991 }
1992 *kpage = phys_to_abs(
1993 (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
1994 (pginfo->next_hwpage * pginfo->hwpage_size));
1995 if ( !(*kpage) && pbuf->addr ) {
1996 ehca_gen_err("pbuf->addr=%lx pbuf->size=%lx "
1997 "next_hwpage=%lx", pbuf->addr,
1998 pbuf->size, pginfo->next_hwpage);
1999 return -EFAULT;
2000 }
2001 (pginfo->hwpage_cnt)++;
2002 (pginfo->next_hwpage)++;
2003 if (PAGE_SIZE >= pginfo->hwpage_size) {
2004 if (pginfo->next_hwpage %
2005 (PAGE_SIZE / pginfo->hwpage_size) == 0)
2006 (pginfo->kpage_cnt)++;
2007 } else
2008 pginfo->kpage_cnt += pginfo->hwpage_size /
2009 PAGE_SIZE;
2010 kpage++;
2011 i++;
2012 if (i >= number) break;
2013 }
2014 if (pginfo->next_hwpage >= offs_hw + num_hw) {
2015 (pginfo->u.phy.next_buf)++;
2016 pginfo->next_hwpage = 0;
2017 }
2018 }
2019 return ret;
2020 }
2021
2022 int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
2023 u32 number,
2024 u64 *kpage)
2025 {
2026 int ret = 0;
2027 u64 *fmrlist;
2028 u32 i;
2029
2030 /* loop over desired page_list entries */
2031 fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
2032 for (i = 0; i < number; i++) {
2033 *kpage = phys_to_abs((*fmrlist & ~(pginfo->hwpage_size - 1)) +
2034 pginfo->next_hwpage * pginfo->hwpage_size);
2035 if ( !(*kpage) ) {
2036 ehca_gen_err("*fmrlist=%lx fmrlist=%p "
2037 "next_listelem=%lx next_hwpage=%lx",
2038 *fmrlist, fmrlist,
2039 pginfo->u.fmr.next_listelem,
2040 pginfo->next_hwpage);
2041 return -EFAULT;
2042 }
2043 (pginfo->hwpage_cnt)++;
2044 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2045 if (pginfo->next_hwpage %
2046 (pginfo->u.fmr.fmr_pgsize /
2047 pginfo->hwpage_size) == 0) {
2048 (pginfo->kpage_cnt)++;
2049 (pginfo->u.fmr.next_listelem)++;
2050 fmrlist++;
2051 pginfo->next_hwpage = 0;
2052 } else
2053 (pginfo->next_hwpage)++;
2054 } else {
2055 unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2056 pginfo->u.fmr.fmr_pgsize;
2057 unsigned int j;
2058 u64 prev = *kpage;
2059 /* check if adrs are contiguous */
2060 for (j = 1; j < cnt_per_hwpage; j++) {
2061 u64 p = phys_to_abs(fmrlist[j] &
2062 ~(pginfo->hwpage_size - 1));
2063 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2064 ehca_gen_err("uncontiguous fmr pages "
2065 "found prev=%lx p=%lx "
2066 "idx=%x", prev, p, i + j);
2067 return -EINVAL;
2068 }
2069 prev = p;
2070 }
2071 pginfo->kpage_cnt += cnt_per_hwpage;
2072 pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2073 fmrlist += cnt_per_hwpage;
2074 }
2075 kpage++;
2076 }
2077 return ret;
2078 }
2079
2080 /* setup page buffer from page info */
2081 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2082 u32 number,
2083 u64 *kpage)
2084 {
2085 int ret;
2086
2087 switch (pginfo->type) {
2088 case EHCA_MR_PGI_PHYS:
2089 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2090 break;
2091 case EHCA_MR_PGI_USER:
2092 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2093 ehca_set_pagebuf_user1(pginfo, number, kpage) :
2094 ehca_set_pagebuf_user2(pginfo, number, kpage);
2095 break;
2096 case EHCA_MR_PGI_FMR:
2097 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2098 break;
2099 default:
2100 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2101 ret = -EFAULT;
2102 break;
2103 }
2104 return ret;
2105 } /* end ehca_set_pagebuf() */
2106
2107 /*----------------------------------------------------------------------*/
2108
2109 /*
2110 * check MR if it is a max-MR, i.e. uses whole memory
2111 * in case it's a max-MR 1 is returned, else 0
2112 */
2113 int ehca_mr_is_maxmr(u64 size,
2114 u64 *iova_start)
2115 {
2116 /* a MR is treated as max-MR only if it fits following: */
2117 if ((size == ((u64)high_memory - PAGE_OFFSET)) &&
2118 (iova_start == (void *)KERNELBASE)) {
2119 ehca_gen_dbg("this is a max-MR");
2120 return 1;
2121 } else
2122 return 0;
2123 } /* end ehca_mr_is_maxmr() */
2124
2125 /*----------------------------------------------------------------------*/
2126
2127 /* map access control for MR/MW. This routine is used for MR and MW. */
2128 void ehca_mrmw_map_acl(int ib_acl,
2129 u32 *hipz_acl)
2130 {
2131 *hipz_acl = 0;
2132 if (ib_acl & IB_ACCESS_REMOTE_READ)
2133 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2134 if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2135 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2136 if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2137 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2138 if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2139 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2140 if (ib_acl & IB_ACCESS_MW_BIND)
2141 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2142 } /* end ehca_mrmw_map_acl() */
2143
2144 /*----------------------------------------------------------------------*/
2145
2146 /* sets page size in hipz access control for MR/MW. */
2147 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2148 {
2149 *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2150 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2151
2152 /*----------------------------------------------------------------------*/
2153
2154 /*
2155 * reverse map access control for MR/MW.
2156 * This routine is used for MR and MW.
2157 */
2158 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2159 int *ib_acl) /*OUT*/
2160 {
2161 *ib_acl = 0;
2162 if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2163 *ib_acl |= IB_ACCESS_REMOTE_READ;
2164 if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2165 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2166 if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2167 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2168 if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2169 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2170 if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2171 *ib_acl |= IB_ACCESS_MW_BIND;
2172 } /* end ehca_mrmw_reverse_map_acl() */
2173
2174
2175 /*----------------------------------------------------------------------*/
2176
2177 /*
2178 * MR destructor and constructor
2179 * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2180 * except struct ib_mr and spinlock
2181 */
2182 void ehca_mr_deletenew(struct ehca_mr *mr)
2183 {
2184 mr->flags = 0;
2185 mr->num_kpages = 0;
2186 mr->num_hwpages = 0;
2187 mr->acl = 0;
2188 mr->start = NULL;
2189 mr->fmr_page_size = 0;
2190 mr->fmr_max_pages = 0;
2191 mr->fmr_max_maps = 0;
2192 mr->fmr_map_cnt = 0;
2193 memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2194 memset(&mr->galpas, 0, sizeof(mr->galpas));
2195 } /* end ehca_mr_deletenew() */
2196
2197 int ehca_init_mrmw_cache(void)
2198 {
2199 mr_cache = kmem_cache_create("ehca_cache_mr",
2200 sizeof(struct ehca_mr), 0,
2201 SLAB_HWCACHE_ALIGN,
2202 NULL);
2203 if (!mr_cache)
2204 return -ENOMEM;
2205 mw_cache = kmem_cache_create("ehca_cache_mw",
2206 sizeof(struct ehca_mw), 0,
2207 SLAB_HWCACHE_ALIGN,
2208 NULL);
2209 if (!mw_cache) {
2210 kmem_cache_destroy(mr_cache);
2211 mr_cache = NULL;
2212 return -ENOMEM;
2213 }
2214 return 0;
2215 }
2216
2217 void ehca_cleanup_mrmw_cache(void)
2218 {
2219 if (mr_cache)
2220 kmem_cache_destroy(mr_cache);
2221 if (mw_cache)
2222 kmem_cache_destroy(mw_cache);
2223 }
kernel source for telekom puls (alcatel/mediatek)