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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 u32 idx = 0;
76 pgsize >>= 12;
77 /*
78 * map mr page size into hw code:
79 * 0, 1, 2, 3 for 4K, 64K, 1M, 64M
80 */
81 while (!(pgsize & 1)) {
82 idx++;
83 pgsize >>= 4;
84 }
85 return idx;
86 }
87
88 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
89 {
90 if (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)
91 return EHCA_MR_PGSIZE16M;
92 return EHCA_MR_PGSIZE4K;
93 }
94
95 static struct ehca_mr *ehca_mr_new(void)
96 {
97 struct ehca_mr *me;
98
99 me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
100 if (me)
101 spin_lock_init(&me->mrlock);
102 else
103 ehca_gen_err("alloc failed");
104
105 return me;
106 }
107
108 static void ehca_mr_delete(struct ehca_mr *me)
109 {
110 kmem_cache_free(mr_cache, me);
111 }
112
113 static struct ehca_mw *ehca_mw_new(void)
114 {
115 struct ehca_mw *me;
116
117 me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
118 if (me)
119 spin_lock_init(&me->mwlock);
120 else
121 ehca_gen_err("alloc failed");
122
123 return me;
124 }
125
126 static void ehca_mw_delete(struct ehca_mw *me)
127 {
128 kmem_cache_free(mw_cache, me);
129 }
130
131 /*----------------------------------------------------------------------*/
132
133 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
134 {
135 struct ib_mr *ib_mr;
136 int ret;
137 struct ehca_mr *e_maxmr;
138 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
139 struct ehca_shca *shca =
140 container_of(pd->device, struct ehca_shca, ib_device);
141
142 if (shca->maxmr) {
143 e_maxmr = ehca_mr_new();
144 if (!e_maxmr) {
145 ehca_err(&shca->ib_device, "out of memory");
146 ib_mr = ERR_PTR(-ENOMEM);
147 goto get_dma_mr_exit0;
148 }
149
150 ret = ehca_reg_maxmr(shca, e_maxmr, (u64 *)KERNELBASE,
151 mr_access_flags, e_pd,
152 &e_maxmr->ib.ib_mr.lkey,
153 &e_maxmr->ib.ib_mr.rkey);
154 if (ret) {
155 ehca_mr_delete(e_maxmr);
156 ib_mr = ERR_PTR(ret);
157 goto get_dma_mr_exit0;
158 }
159 ib_mr = &e_maxmr->ib.ib_mr;
160 } else {
161 ehca_err(&shca->ib_device, "no internal max-MR exist!");
162 ib_mr = ERR_PTR(-EINVAL);
163 goto get_dma_mr_exit0;
164 }
165
166 get_dma_mr_exit0:
167 if (IS_ERR(ib_mr))
168 ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x",
169 PTR_ERR(ib_mr), pd, mr_access_flags);
170 return ib_mr;
171 } /* end ehca_get_dma_mr() */
172
173 /*----------------------------------------------------------------------*/
174
175 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
176 struct ib_phys_buf *phys_buf_array,
177 int num_phys_buf,
178 int mr_access_flags,
179 u64 *iova_start)
180 {
181 struct ib_mr *ib_mr;
182 int ret;
183 struct ehca_mr *e_mr;
184 struct ehca_shca *shca =
185 container_of(pd->device, struct ehca_shca, ib_device);
186 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
187
188 u64 size;
189
190 if ((num_phys_buf <= 0) || !phys_buf_array) {
191 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
192 "phys_buf_array=%p", num_phys_buf, phys_buf_array);
193 ib_mr = ERR_PTR(-EINVAL);
194 goto reg_phys_mr_exit0;
195 }
196 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
197 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
198 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
199 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
200 /*
201 * Remote Write Access requires Local Write Access
202 * Remote Atomic Access requires Local Write Access
203 */
204 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
205 mr_access_flags);
206 ib_mr = ERR_PTR(-EINVAL);
207 goto reg_phys_mr_exit0;
208 }
209
210 /* check physical buffer list and calculate size */
211 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
212 iova_start, &size);
213 if (ret) {
214 ib_mr = ERR_PTR(ret);
215 goto reg_phys_mr_exit0;
216 }
217 if ((size == 0) ||
218 (((u64)iova_start + size) < (u64)iova_start)) {
219 ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
220 size, iova_start);
221 ib_mr = ERR_PTR(-EINVAL);
222 goto reg_phys_mr_exit0;
223 }
224
225 e_mr = ehca_mr_new();
226 if (!e_mr) {
227 ehca_err(pd->device, "out of memory");
228 ib_mr = ERR_PTR(-ENOMEM);
229 goto reg_phys_mr_exit0;
230 }
231
232 /* register MR on HCA */
233 if (ehca_mr_is_maxmr(size, iova_start)) {
234 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
235 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
236 e_pd, &e_mr->ib.ib_mr.lkey,
237 &e_mr->ib.ib_mr.rkey);
238 if (ret) {
239 ib_mr = ERR_PTR(ret);
240 goto reg_phys_mr_exit1;
241 }
242 } else {
243 struct ehca_mr_pginfo pginfo;
244 u32 num_kpages;
245 u32 num_hwpages;
246 u64 hw_pgsize;
247
248 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
249 PAGE_SIZE);
250 /* for kernel space we try most possible pgsize */
251 hw_pgsize = ehca_get_max_hwpage_size(shca);
252 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
253 hw_pgsize);
254 memset(&pginfo, 0, sizeof(pginfo));
255 pginfo.type = EHCA_MR_PGI_PHYS;
256 pginfo.num_kpages = num_kpages;
257 pginfo.hwpage_size = hw_pgsize;
258 pginfo.num_hwpages = num_hwpages;
259 pginfo.u.phy.num_phys_buf = num_phys_buf;
260 pginfo.u.phy.phys_buf_array = phys_buf_array;
261 pginfo.next_hwpage =
262 ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
263
264 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
265 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
266 &e_mr->ib.ib_mr.rkey);
267 if (ret) {
268 ib_mr = ERR_PTR(ret);
269 goto reg_phys_mr_exit1;
270 }
271 }
272
273 /* successful registration of all pages */
274 return &e_mr->ib.ib_mr;
275
276 reg_phys_mr_exit1:
277 ehca_mr_delete(e_mr);
278 reg_phys_mr_exit0:
279 if (IS_ERR(ib_mr))
280 ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p "
281 "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
282 PTR_ERR(ib_mr), pd, phys_buf_array,
283 num_phys_buf, mr_access_flags, iova_start);
284 return ib_mr;
285 } /* end ehca_reg_phys_mr() */
286
287 /*----------------------------------------------------------------------*/
288
289 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
290 u64 virt, int mr_access_flags,
291 struct ib_udata *udata)
292 {
293 struct ib_mr *ib_mr;
294 struct ehca_mr *e_mr;
295 struct ehca_shca *shca =
296 container_of(pd->device, struct ehca_shca, ib_device);
297 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
298 struct ehca_mr_pginfo pginfo;
299 int ret;
300 u32 num_kpages;
301 u32 num_hwpages;
302 u64 hwpage_size;
303
304 if (!pd) {
305 ehca_gen_err("bad pd=%p", pd);
306 return ERR_PTR(-EFAULT);
307 }
308
309 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
310 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
311 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
312 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
313 /*
314 * Remote Write Access requires Local Write Access
315 * Remote Atomic Access requires Local Write Access
316 */
317 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
318 mr_access_flags);
319 ib_mr = ERR_PTR(-EINVAL);
320 goto reg_user_mr_exit0;
321 }
322
323 if (length == 0 || virt + length < virt) {
324 ehca_err(pd->device, "bad input values: length=%lx "
325 "virt_base=%lx", length, virt);
326 ib_mr = ERR_PTR(-EINVAL);
327 goto reg_user_mr_exit0;
328 }
329
330 e_mr = ehca_mr_new();
331 if (!e_mr) {
332 ehca_err(pd->device, "out of memory");
333 ib_mr = ERR_PTR(-ENOMEM);
334 goto reg_user_mr_exit0;
335 }
336
337 e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
338 mr_access_flags);
339 if (IS_ERR(e_mr->umem)) {
340 ib_mr = (void *)e_mr->umem;
341 goto reg_user_mr_exit1;
342 }
343
344 if (e_mr->umem->page_size != PAGE_SIZE) {
345 ehca_err(pd->device, "page size not supported, "
346 "e_mr->umem->page_size=%x", e_mr->umem->page_size);
347 ib_mr = ERR_PTR(-EINVAL);
348 goto reg_user_mr_exit2;
349 }
350
351 /* determine number of MR pages */
352 num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
353 /* select proper hw_pgsize */
354 if (ehca_mr_largepage &&
355 (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)) {
356 int page_shift = PAGE_SHIFT;
357 if (e_mr->umem->hugetlb) {
358 /* determine page_shift, clamp between 4K and 16M */
359 page_shift = (fls64(length - 1) + 3) & ~3;
360 page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
361 EHCA_MR_PGSHIFT16M);
362 }
363 hwpage_size = 1UL << page_shift;
364 } else
365 hwpage_size = EHCA_MR_PGSIZE4K; /* ehca1 only supports 4k */
366 ehca_dbg(pd->device, "hwpage_size=%lx", hwpage_size);
367
368 reg_user_mr_fallback:
369 num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
370 /* register MR on HCA */
371 memset(&pginfo, 0, sizeof(pginfo));
372 pginfo.type = EHCA_MR_PGI_USER;
373 pginfo.hwpage_size = hwpage_size;
374 pginfo.num_kpages = num_kpages;
375 pginfo.num_hwpages = num_hwpages;
376 pginfo.u.usr.region = e_mr->umem;
377 pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
378 pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
379 (&e_mr->umem->chunk_list),
380 list);
381
382 ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
383 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
384 &e_mr->ib.ib_mr.rkey);
385 if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
386 ehca_warn(pd->device, "failed to register mr "
387 "with hwpage_size=%lx", hwpage_size);
388 ehca_info(pd->device, "try to register mr with "
389 "kpage_size=%lx", PAGE_SIZE);
390 /*
391 * this means kpages are not contiguous for a hw page
392 * try kernel page size as fallback solution
393 */
394 hwpage_size = PAGE_SIZE;
395 goto reg_user_mr_fallback;
396 }
397 if (ret) {
398 ib_mr = ERR_PTR(ret);
399 goto reg_user_mr_exit2;
400 }
401
402 /* successful registration of all pages */
403 return &e_mr->ib.ib_mr;
404
405 reg_user_mr_exit2:
406 ib_umem_release(e_mr->umem);
407 reg_user_mr_exit1:
408 ehca_mr_delete(e_mr);
409 reg_user_mr_exit0:
410 if (IS_ERR(ib_mr))
411 ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p",
412 PTR_ERR(ib_mr), pd, mr_access_flags, udata);
413 return ib_mr;
414 } /* end ehca_reg_user_mr() */
415
416 /*----------------------------------------------------------------------*/
417
418 int ehca_rereg_phys_mr(struct ib_mr *mr,
419 int mr_rereg_mask,
420 struct ib_pd *pd,
421 struct ib_phys_buf *phys_buf_array,
422 int num_phys_buf,
423 int mr_access_flags,
424 u64 *iova_start)
425 {
426 int ret;
427
428 struct ehca_shca *shca =
429 container_of(mr->device, struct ehca_shca, ib_device);
430 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
431 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
432 u64 new_size;
433 u64 *new_start;
434 u32 new_acl;
435 struct ehca_pd *new_pd;
436 u32 tmp_lkey, tmp_rkey;
437 unsigned long sl_flags;
438 u32 num_kpages = 0;
439 u32 num_hwpages = 0;
440 struct ehca_mr_pginfo pginfo;
441 u32 cur_pid = current->tgid;
442
443 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
444 (my_pd->ownpid != cur_pid)) {
445 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
446 cur_pid, my_pd->ownpid);
447 ret = -EINVAL;
448 goto rereg_phys_mr_exit0;
449 }
450
451 if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
452 /* TODO not supported, because PHYP rereg hCall needs pages */
453 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
454 "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
455 ret = -EINVAL;
456 goto rereg_phys_mr_exit0;
457 }
458
459 if (mr_rereg_mask & IB_MR_REREG_PD) {
460 if (!pd) {
461 ehca_err(mr->device, "rereg with bad pd, pd=%p "
462 "mr_rereg_mask=%x", pd, mr_rereg_mask);
463 ret = -EINVAL;
464 goto rereg_phys_mr_exit0;
465 }
466 }
467
468 if ((mr_rereg_mask &
469 ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
470 (mr_rereg_mask == 0)) {
471 ret = -EINVAL;
472 goto rereg_phys_mr_exit0;
473 }
474
475 /* check other parameters */
476 if (e_mr == shca->maxmr) {
477 /* should be impossible, however reject to be sure */
478 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
479 "shca->maxmr=%p mr->lkey=%x",
480 mr, shca->maxmr, mr->lkey);
481 ret = -EINVAL;
482 goto rereg_phys_mr_exit0;
483 }
484 if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
485 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
486 ehca_err(mr->device, "not supported for FMR, mr=%p "
487 "flags=%x", mr, e_mr->flags);
488 ret = -EINVAL;
489 goto rereg_phys_mr_exit0;
490 }
491 if (!phys_buf_array || num_phys_buf <= 0) {
492 ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
493 " phys_buf_array=%p num_phys_buf=%x",
494 mr_rereg_mask, phys_buf_array, num_phys_buf);
495 ret = -EINVAL;
496 goto rereg_phys_mr_exit0;
497 }
498 }
499 if ((mr_rereg_mask & IB_MR_REREG_ACCESS) && /* change ACL */
500 (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
501 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
502 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
503 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
504 /*
505 * Remote Write Access requires Local Write Access
506 * Remote Atomic Access requires Local Write Access
507 */
508 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
509 "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
510 ret = -EINVAL;
511 goto rereg_phys_mr_exit0;
512 }
513
514 /* set requested values dependent on rereg request */
515 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
516 new_start = e_mr->start;
517 new_size = e_mr->size;
518 new_acl = e_mr->acl;
519 new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
520
521 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
522 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
523
524 new_start = iova_start; /* change address */
525 /* check physical buffer list and calculate size */
526 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
527 num_phys_buf, iova_start,
528 &new_size);
529 if (ret)
530 goto rereg_phys_mr_exit1;
531 if ((new_size == 0) ||
532 (((u64)iova_start + new_size) < (u64)iova_start)) {
533 ehca_err(mr->device, "bad input values: new_size=%lx "
534 "iova_start=%p", new_size, iova_start);
535 ret = -EINVAL;
536 goto rereg_phys_mr_exit1;
537 }
538 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
539 new_size, PAGE_SIZE);
540 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
541 new_size, hw_pgsize);
542 memset(&pginfo, 0, sizeof(pginfo));
543 pginfo.type = EHCA_MR_PGI_PHYS;
544 pginfo.num_kpages = num_kpages;
545 pginfo.hwpage_size = hw_pgsize;
546 pginfo.num_hwpages = num_hwpages;
547 pginfo.u.phy.num_phys_buf = num_phys_buf;
548 pginfo.u.phy.phys_buf_array = phys_buf_array;
549 pginfo.next_hwpage =
550 ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
551 }
552 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
553 new_acl = mr_access_flags;
554 if (mr_rereg_mask & IB_MR_REREG_PD)
555 new_pd = container_of(pd, struct ehca_pd, ib_pd);
556
557 ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
558 new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
559 if (ret)
560 goto rereg_phys_mr_exit1;
561
562 /* successful reregistration */
563 if (mr_rereg_mask & IB_MR_REREG_PD)
564 mr->pd = pd;
565 mr->lkey = tmp_lkey;
566 mr->rkey = tmp_rkey;
567
568 rereg_phys_mr_exit1:
569 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
570 rereg_phys_mr_exit0:
571 if (ret)
572 ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p "
573 "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
574 "iova_start=%p",
575 ret, mr, mr_rereg_mask, pd, phys_buf_array,
576 num_phys_buf, mr_access_flags, iova_start);
577 return ret;
578 } /* end ehca_rereg_phys_mr() */
579
580 /*----------------------------------------------------------------------*/
581
582 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
583 {
584 int ret = 0;
585 u64 h_ret;
586 struct ehca_shca *shca =
587 container_of(mr->device, struct ehca_shca, ib_device);
588 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
589 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
590 u32 cur_pid = current->tgid;
591 unsigned long sl_flags;
592 struct ehca_mr_hipzout_parms hipzout;
593
594 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
595 (my_pd->ownpid != cur_pid)) {
596 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
597 cur_pid, my_pd->ownpid);
598 ret = -EINVAL;
599 goto query_mr_exit0;
600 }
601
602 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
603 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
604 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
605 ret = -EINVAL;
606 goto query_mr_exit0;
607 }
608
609 memset(mr_attr, 0, sizeof(struct ib_mr_attr));
610 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
611
612 h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
613 if (h_ret != H_SUCCESS) {
614 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%li mr=%p "
615 "hca_hndl=%lx mr_hndl=%lx lkey=%x",
616 h_ret, mr, shca->ipz_hca_handle.handle,
617 e_mr->ipz_mr_handle.handle, mr->lkey);
618 ret = ehca2ib_return_code(h_ret);
619 goto query_mr_exit1;
620 }
621 mr_attr->pd = mr->pd;
622 mr_attr->device_virt_addr = hipzout.vaddr;
623 mr_attr->size = hipzout.len;
624 mr_attr->lkey = hipzout.lkey;
625 mr_attr->rkey = hipzout.rkey;
626 ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
627
628 query_mr_exit1:
629 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
630 query_mr_exit0:
631 if (ret)
632 ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p",
633 ret, mr, mr_attr);
634 return ret;
635 } /* end ehca_query_mr() */
636
637 /*----------------------------------------------------------------------*/
638
639 int ehca_dereg_mr(struct ib_mr *mr)
640 {
641 int ret = 0;
642 u64 h_ret;
643 struct ehca_shca *shca =
644 container_of(mr->device, struct ehca_shca, ib_device);
645 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
646 struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
647 u32 cur_pid = current->tgid;
648
649 if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
650 (my_pd->ownpid != cur_pid)) {
651 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
652 cur_pid, my_pd->ownpid);
653 ret = -EINVAL;
654 goto dereg_mr_exit0;
655 }
656
657 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
658 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
659 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
660 ret = -EINVAL;
661 goto dereg_mr_exit0;
662 } else if (e_mr == shca->maxmr) {
663 /* should be impossible, however reject to be sure */
664 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
665 "shca->maxmr=%p mr->lkey=%x",
666 mr, shca->maxmr, mr->lkey);
667 ret = -EINVAL;
668 goto dereg_mr_exit0;
669 }
670
671 /* TODO: BUSY: MR still has bound window(s) */
672 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
673 if (h_ret != H_SUCCESS) {
674 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%li shca=%p "
675 "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
676 h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
677 e_mr->ipz_mr_handle.handle, mr->lkey);
678 ret = ehca2ib_return_code(h_ret);
679 goto dereg_mr_exit0;
680 }
681
682 if (e_mr->umem)
683 ib_umem_release(e_mr->umem);
684
685 /* successful deregistration */
686 ehca_mr_delete(e_mr);
687
688 dereg_mr_exit0:
689 if (ret)
690 ehca_err(mr->device, "ret=%i mr=%p", ret, mr);
691 return ret;
692 } /* end ehca_dereg_mr() */
693
694 /*----------------------------------------------------------------------*/
695
696 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
697 {
698 struct ib_mw *ib_mw;
699 u64 h_ret;
700 struct ehca_mw *e_mw;
701 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
702 struct ehca_shca *shca =
703 container_of(pd->device, struct ehca_shca, ib_device);
704 struct ehca_mw_hipzout_parms hipzout;
705
706 e_mw = ehca_mw_new();
707 if (!e_mw) {
708 ib_mw = ERR_PTR(-ENOMEM);
709 goto alloc_mw_exit0;
710 }
711
712 h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
713 e_pd->fw_pd, &hipzout);
714 if (h_ret != H_SUCCESS) {
715 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%li "
716 "shca=%p hca_hndl=%lx mw=%p",
717 h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
718 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
719 goto alloc_mw_exit1;
720 }
721 /* successful MW allocation */
722 e_mw->ipz_mw_handle = hipzout.handle;
723 e_mw->ib_mw.rkey = hipzout.rkey;
724 return &e_mw->ib_mw;
725
726 alloc_mw_exit1:
727 ehca_mw_delete(e_mw);
728 alloc_mw_exit0:
729 if (IS_ERR(ib_mw))
730 ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd);
731 return ib_mw;
732 } /* end ehca_alloc_mw() */
733
734 /*----------------------------------------------------------------------*/
735
736 int ehca_bind_mw(struct ib_qp *qp,
737 struct ib_mw *mw,
738 struct ib_mw_bind *mw_bind)
739 {
740 /* TODO: not supported up to now */
741 ehca_gen_err("bind MW currently not supported by HCAD");
742
743 return -EPERM;
744 } /* end ehca_bind_mw() */
745
746 /*----------------------------------------------------------------------*/
747
748 int ehca_dealloc_mw(struct ib_mw *mw)
749 {
750 u64 h_ret;
751 struct ehca_shca *shca =
752 container_of(mw->device, struct ehca_shca, ib_device);
753 struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
754
755 h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
756 if (h_ret != H_SUCCESS) {
757 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%li shca=%p "
758 "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
759 h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
760 e_mw->ipz_mw_handle.handle);
761 return ehca2ib_return_code(h_ret);
762 }
763 /* successful deallocation */
764 ehca_mw_delete(e_mw);
765 return 0;
766 } /* end ehca_dealloc_mw() */
767
768 /*----------------------------------------------------------------------*/
769
770 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
771 int mr_access_flags,
772 struct ib_fmr_attr *fmr_attr)
773 {
774 struct ib_fmr *ib_fmr;
775 struct ehca_shca *shca =
776 container_of(pd->device, struct ehca_shca, ib_device);
777 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
778 struct ehca_mr *e_fmr;
779 int ret;
780 u32 tmp_lkey, tmp_rkey;
781 struct ehca_mr_pginfo pginfo;
782 u64 hw_pgsize;
783
784 /* check other parameters */
785 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
786 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
787 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
788 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
789 /*
790 * Remote Write Access requires Local Write Access
791 * Remote Atomic Access requires Local Write Access
792 */
793 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
794 mr_access_flags);
795 ib_fmr = ERR_PTR(-EINVAL);
796 goto alloc_fmr_exit0;
797 }
798 if (mr_access_flags & IB_ACCESS_MW_BIND) {
799 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
800 mr_access_flags);
801 ib_fmr = ERR_PTR(-EINVAL);
802 goto alloc_fmr_exit0;
803 }
804 if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
805 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
806 "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
807 fmr_attr->max_pages, fmr_attr->max_maps,
808 fmr_attr->page_shift);
809 ib_fmr = ERR_PTR(-EINVAL);
810 goto alloc_fmr_exit0;
811 }
812 hw_pgsize = ehca_get_max_hwpage_size(shca);
813 if ((1 << fmr_attr->page_shift) != hw_pgsize) {
814 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
815 fmr_attr->page_shift);
816 ib_fmr = ERR_PTR(-EINVAL);
817 goto alloc_fmr_exit0;
818 }
819
820 e_fmr = ehca_mr_new();
821 if (!e_fmr) {
822 ib_fmr = ERR_PTR(-ENOMEM);
823 goto alloc_fmr_exit0;
824 }
825 e_fmr->flags |= EHCA_MR_FLAG_FMR;
826
827 /* register MR on HCA */
828 memset(&pginfo, 0, sizeof(pginfo));
829 /*
830 * pginfo.num_hwpages==0, ie register_rpages() will not be called
831 * but deferred to map_phys_fmr()
832 */
833 ret = ehca_reg_mr(shca, e_fmr, NULL,
834 fmr_attr->max_pages * (1 << fmr_attr->page_shift),
835 mr_access_flags, e_pd, &pginfo,
836 &tmp_lkey, &tmp_rkey);
837 if (ret) {
838 ib_fmr = ERR_PTR(ret);
839 goto alloc_fmr_exit1;
840 }
841
842 /* successful */
843 e_fmr->hwpage_size = hw_pgsize;
844 e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
845 e_fmr->fmr_max_pages = fmr_attr->max_pages;
846 e_fmr->fmr_max_maps = fmr_attr->max_maps;
847 e_fmr->fmr_map_cnt = 0;
848 return &e_fmr->ib.ib_fmr;
849
850 alloc_fmr_exit1:
851 ehca_mr_delete(e_fmr);
852 alloc_fmr_exit0:
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=%i 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=%i 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=%li 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=%i 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=%li "
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=%li 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=%i",
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=%i 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=%i 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=%li "
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=%li 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=%i 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=%li 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=%i 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=%li 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=%i 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=%li 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=%li 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=%i 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=%li "
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=%i 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=%i 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=%li "
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=%i 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=%i 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)