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 <linux/slab.h>
44 #include <rdma/ib_umem.h>
45
46 #include "ehca_iverbs.h"
47 #include "ehca_mrmw.h"
48 #include "hcp_if.h"
49 #include "hipz_hw.h"
50
51 #define NUM_CHUNKS(length, chunk_size) \
52 (((length) + (chunk_size - 1)) / (chunk_size))
53
54 /* max number of rpages (per hcall register_rpages) */
55 #define MAX_RPAGES 512
56
57 /* DMEM toleration management */
58 #define EHCA_SECTSHIFT SECTION_SIZE_BITS
59 #define EHCA_SECTSIZE (1UL << EHCA_SECTSHIFT)
60 #define EHCA_HUGEPAGESHIFT 34
61 #define EHCA_HUGEPAGE_SIZE (1UL << EHCA_HUGEPAGESHIFT)
62 #define EHCA_HUGEPAGE_PFN_MASK ((EHCA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT)
63 #define EHCA_INVAL_ADDR 0xFFFFFFFFFFFFFFFFULL
64 #define EHCA_DIR_INDEX_SHIFT 13 /* 8k Entries in 64k block */
65 #define EHCA_TOP_INDEX_SHIFT (EHCA_DIR_INDEX_SHIFT * 2)
66 #define EHCA_MAP_ENTRIES (1 << EHCA_DIR_INDEX_SHIFT)
67 #define EHCA_TOP_MAP_SIZE (0x10000) /* currently fixed map size */
68 #define EHCA_DIR_MAP_SIZE (0x10000)
69 #define EHCA_ENT_MAP_SIZE (0x10000)
70 #define EHCA_INDEX_MASK (EHCA_MAP_ENTRIES - 1)
71
72 static unsigned long ehca_mr_len;
73
74 /*
75 * Memory map data structures
76 */
77 struct ehca_dir_bmap {
78 u64 ent[EHCA_MAP_ENTRIES];
79 };
80 struct ehca_top_bmap {
81 struct ehca_dir_bmap *dir[EHCA_MAP_ENTRIES];
82 };
83 struct ehca_bmap {
84 struct ehca_top_bmap *top[EHCA_MAP_ENTRIES];
85 };
86
87 static struct ehca_bmap *ehca_bmap;
88
89 static struct kmem_cache *mr_cache;
90 static struct kmem_cache *mw_cache;
91
92 enum ehca_mr_pgsize {
93 EHCA_MR_PGSIZE4K = 0x1000L,
94 EHCA_MR_PGSIZE64K = 0x10000L,
95 EHCA_MR_PGSIZE1M = 0x100000L,
96 EHCA_MR_PGSIZE16M = 0x1000000L
97 };
98
99 #define EHCA_MR_PGSHIFT4K 12
100 #define EHCA_MR_PGSHIFT64K 16
101 #define EHCA_MR_PGSHIFT1M 20
102 #define EHCA_MR_PGSHIFT16M 24
103
104 static u64 ehca_map_vaddr(void *caddr);
105
ehca_encode_hwpage_size(u32 pgsize)106 static u32 ehca_encode_hwpage_size(u32 pgsize)
107 {
108 int log = ilog2(pgsize);
109 WARN_ON(log < 12 || log > 24 || log & 3);
110 return (log - 12) / 4;
111 }
112
ehca_get_max_hwpage_size(struct ehca_shca * shca)113 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
114 {
115 return rounddown_pow_of_two(shca->hca_cap_mr_pgsize);
116 }
117
ehca_mr_new(void)118 static struct ehca_mr *ehca_mr_new(void)
119 {
120 struct ehca_mr *me;
121
122 me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
123 if (me)
124 spin_lock_init(&me->mrlock);
125 else
126 ehca_gen_err("alloc failed");
127
128 return me;
129 }
130
ehca_mr_delete(struct ehca_mr * me)131 static void ehca_mr_delete(struct ehca_mr *me)
132 {
133 kmem_cache_free(mr_cache, me);
134 }
135
ehca_mw_new(void)136 static struct ehca_mw *ehca_mw_new(void)
137 {
138 struct ehca_mw *me;
139
140 me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
141 if (me)
142 spin_lock_init(&me->mwlock);
143 else
144 ehca_gen_err("alloc failed");
145
146 return me;
147 }
148
ehca_mw_delete(struct ehca_mw * me)149 static void ehca_mw_delete(struct ehca_mw *me)
150 {
151 kmem_cache_free(mw_cache, me);
152 }
153
154 /*----------------------------------------------------------------------*/
155
ehca_get_dma_mr(struct ib_pd * pd,int mr_access_flags)156 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
157 {
158 struct ib_mr *ib_mr;
159 int ret;
160 struct ehca_mr *e_maxmr;
161 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
162 struct ehca_shca *shca =
163 container_of(pd->device, struct ehca_shca, ib_device);
164
165 if (shca->maxmr) {
166 e_maxmr = ehca_mr_new();
167 if (!e_maxmr) {
168 ehca_err(&shca->ib_device, "out of memory");
169 ib_mr = ERR_PTR(-ENOMEM);
170 goto get_dma_mr_exit0;
171 }
172
173 ret = ehca_reg_maxmr(shca, e_maxmr,
174 (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)),
175 mr_access_flags, e_pd,
176 &e_maxmr->ib.ib_mr.lkey,
177 &e_maxmr->ib.ib_mr.rkey);
178 if (ret) {
179 ehca_mr_delete(e_maxmr);
180 ib_mr = ERR_PTR(ret);
181 goto get_dma_mr_exit0;
182 }
183 ib_mr = &e_maxmr->ib.ib_mr;
184 } else {
185 ehca_err(&shca->ib_device, "no internal max-MR exist!");
186 ib_mr = ERR_PTR(-EINVAL);
187 goto get_dma_mr_exit0;
188 }
189
190 get_dma_mr_exit0:
191 if (IS_ERR(ib_mr))
192 ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x",
193 PTR_ERR(ib_mr), pd, mr_access_flags);
194 return ib_mr;
195 } /* end ehca_get_dma_mr() */
196
197 /*----------------------------------------------------------------------*/
198
ehca_reg_phys_mr(struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)199 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
200 struct ib_phys_buf *phys_buf_array,
201 int num_phys_buf,
202 int mr_access_flags,
203 u64 *iova_start)
204 {
205 struct ib_mr *ib_mr;
206 int ret;
207 struct ehca_mr *e_mr;
208 struct ehca_shca *shca =
209 container_of(pd->device, struct ehca_shca, ib_device);
210 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
211
212 u64 size;
213
214 if ((num_phys_buf <= 0) || !phys_buf_array) {
215 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
216 "phys_buf_array=%p", num_phys_buf, phys_buf_array);
217 ib_mr = ERR_PTR(-EINVAL);
218 goto reg_phys_mr_exit0;
219 }
220 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
221 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
222 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
223 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
224 /*
225 * Remote Write Access requires Local Write Access
226 * Remote Atomic Access requires Local Write Access
227 */
228 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
229 mr_access_flags);
230 ib_mr = ERR_PTR(-EINVAL);
231 goto reg_phys_mr_exit0;
232 }
233
234 /* check physical buffer list and calculate size */
235 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
236 iova_start, &size);
237 if (ret) {
238 ib_mr = ERR_PTR(ret);
239 goto reg_phys_mr_exit0;
240 }
241 if ((size == 0) ||
242 (((u64)iova_start + size) < (u64)iova_start)) {
243 ehca_err(pd->device, "bad input values: size=%llx iova_start=%p",
244 size, iova_start);
245 ib_mr = ERR_PTR(-EINVAL);
246 goto reg_phys_mr_exit0;
247 }
248
249 e_mr = ehca_mr_new();
250 if (!e_mr) {
251 ehca_err(pd->device, "out of memory");
252 ib_mr = ERR_PTR(-ENOMEM);
253 goto reg_phys_mr_exit0;
254 }
255
256 /* register MR on HCA */
257 if (ehca_mr_is_maxmr(size, iova_start)) {
258 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
259 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
260 e_pd, &e_mr->ib.ib_mr.lkey,
261 &e_mr->ib.ib_mr.rkey);
262 if (ret) {
263 ib_mr = ERR_PTR(ret);
264 goto reg_phys_mr_exit1;
265 }
266 } else {
267 struct ehca_mr_pginfo pginfo;
268 u32 num_kpages;
269 u32 num_hwpages;
270 u64 hw_pgsize;
271
272 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
273 PAGE_SIZE);
274 /* for kernel space we try most possible pgsize */
275 hw_pgsize = ehca_get_max_hwpage_size(shca);
276 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
277 hw_pgsize);
278 memset(&pginfo, 0, sizeof(pginfo));
279 pginfo.type = EHCA_MR_PGI_PHYS;
280 pginfo.num_kpages = num_kpages;
281 pginfo.hwpage_size = hw_pgsize;
282 pginfo.num_hwpages = num_hwpages;
283 pginfo.u.phy.num_phys_buf = num_phys_buf;
284 pginfo.u.phy.phys_buf_array = phys_buf_array;
285 pginfo.next_hwpage =
286 ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
287
288 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
289 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
290 &e_mr->ib.ib_mr.rkey, EHCA_REG_MR);
291 if (ret) {
292 ib_mr = ERR_PTR(ret);
293 goto reg_phys_mr_exit1;
294 }
295 }
296
297 /* successful registration of all pages */
298 return &e_mr->ib.ib_mr;
299
300 reg_phys_mr_exit1:
301 ehca_mr_delete(e_mr);
302 reg_phys_mr_exit0:
303 if (IS_ERR(ib_mr))
304 ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p "
305 "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
306 PTR_ERR(ib_mr), pd, phys_buf_array,
307 num_phys_buf, mr_access_flags, iova_start);
308 return ib_mr;
309 } /* end ehca_reg_phys_mr() */
310
311 /*----------------------------------------------------------------------*/
312
ehca_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int mr_access_flags,struct ib_udata * udata)313 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
314 u64 virt, int mr_access_flags,
315 struct ib_udata *udata)
316 {
317 struct ib_mr *ib_mr;
318 struct ehca_mr *e_mr;
319 struct ehca_shca *shca =
320 container_of(pd->device, struct ehca_shca, ib_device);
321 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
322 struct ehca_mr_pginfo pginfo;
323 int ret, page_shift;
324 u32 num_kpages;
325 u32 num_hwpages;
326 u64 hwpage_size;
327
328 if (!pd) {
329 ehca_gen_err("bad pd=%p", pd);
330 return ERR_PTR(-EFAULT);
331 }
332
333 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
334 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
335 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
336 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
337 /*
338 * Remote Write Access requires Local Write Access
339 * Remote Atomic Access requires Local Write Access
340 */
341 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
342 mr_access_flags);
343 ib_mr = ERR_PTR(-EINVAL);
344 goto reg_user_mr_exit0;
345 }
346
347 if (length == 0 || virt + length < virt) {
348 ehca_err(pd->device, "bad input values: length=%llx "
349 "virt_base=%llx", length, virt);
350 ib_mr = ERR_PTR(-EINVAL);
351 goto reg_user_mr_exit0;
352 }
353
354 e_mr = ehca_mr_new();
355 if (!e_mr) {
356 ehca_err(pd->device, "out of memory");
357 ib_mr = ERR_PTR(-ENOMEM);
358 goto reg_user_mr_exit0;
359 }
360
361 e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
362 mr_access_flags, 0);
363 if (IS_ERR(e_mr->umem)) {
364 ib_mr = (void *)e_mr->umem;
365 goto reg_user_mr_exit1;
366 }
367
368 if (e_mr->umem->page_size != PAGE_SIZE) {
369 ehca_err(pd->device, "page size not supported, "
370 "e_mr->umem->page_size=%x", e_mr->umem->page_size);
371 ib_mr = ERR_PTR(-EINVAL);
372 goto reg_user_mr_exit2;
373 }
374
375 /* determine number of MR pages */
376 num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
377 /* select proper hw_pgsize */
378 page_shift = PAGE_SHIFT;
379 if (e_mr->umem->hugetlb) {
380 /* determine page_shift, clamp between 4K and 16M */
381 page_shift = (fls64(length - 1) + 3) & ~3;
382 page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
383 EHCA_MR_PGSHIFT16M);
384 }
385 hwpage_size = 1UL << page_shift;
386
387 /* now that we have the desired page size, shift until it's
388 * supported, too. 4K is always supported, so this terminates.
389 */
390 while (!(hwpage_size & shca->hca_cap_mr_pgsize))
391 hwpage_size >>= 4;
392
393 reg_user_mr_fallback:
394 num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
395 /* register MR on HCA */
396 memset(&pginfo, 0, sizeof(pginfo));
397 pginfo.type = EHCA_MR_PGI_USER;
398 pginfo.hwpage_size = hwpage_size;
399 pginfo.num_kpages = num_kpages;
400 pginfo.num_hwpages = num_hwpages;
401 pginfo.u.usr.region = e_mr->umem;
402 pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
403 pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
404 (&e_mr->umem->chunk_list),
405 list);
406
407 ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
408 e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
409 &e_mr->ib.ib_mr.rkey, EHCA_REG_MR);
410 if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
411 ehca_warn(pd->device, "failed to register mr "
412 "with hwpage_size=%llx", hwpage_size);
413 ehca_info(pd->device, "try to register mr with "
414 "kpage_size=%lx", PAGE_SIZE);
415 /*
416 * this means kpages are not contiguous for a hw page
417 * try kernel page size as fallback solution
418 */
419 hwpage_size = PAGE_SIZE;
420 goto reg_user_mr_fallback;
421 }
422 if (ret) {
423 ib_mr = ERR_PTR(ret);
424 goto reg_user_mr_exit2;
425 }
426
427 /* successful registration of all pages */
428 return &e_mr->ib.ib_mr;
429
430 reg_user_mr_exit2:
431 ib_umem_release(e_mr->umem);
432 reg_user_mr_exit1:
433 ehca_mr_delete(e_mr);
434 reg_user_mr_exit0:
435 if (IS_ERR(ib_mr))
436 ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p",
437 PTR_ERR(ib_mr), pd, mr_access_flags, udata);
438 return ib_mr;
439 } /* end ehca_reg_user_mr() */
440
441 /*----------------------------------------------------------------------*/
442
ehca_rereg_phys_mr(struct ib_mr * mr,int mr_rereg_mask,struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)443 int ehca_rereg_phys_mr(struct ib_mr *mr,
444 int mr_rereg_mask,
445 struct ib_pd *pd,
446 struct ib_phys_buf *phys_buf_array,
447 int num_phys_buf,
448 int mr_access_flags,
449 u64 *iova_start)
450 {
451 int ret;
452
453 struct ehca_shca *shca =
454 container_of(mr->device, struct ehca_shca, ib_device);
455 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
456 u64 new_size;
457 u64 *new_start;
458 u32 new_acl;
459 struct ehca_pd *new_pd;
460 u32 tmp_lkey, tmp_rkey;
461 unsigned long sl_flags;
462 u32 num_kpages = 0;
463 u32 num_hwpages = 0;
464 struct ehca_mr_pginfo pginfo;
465
466 if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
467 /* TODO not supported, because PHYP rereg hCall needs pages */
468 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
469 "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
470 ret = -EINVAL;
471 goto rereg_phys_mr_exit0;
472 }
473
474 if (mr_rereg_mask & IB_MR_REREG_PD) {
475 if (!pd) {
476 ehca_err(mr->device, "rereg with bad pd, pd=%p "
477 "mr_rereg_mask=%x", pd, mr_rereg_mask);
478 ret = -EINVAL;
479 goto rereg_phys_mr_exit0;
480 }
481 }
482
483 if ((mr_rereg_mask &
484 ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
485 (mr_rereg_mask == 0)) {
486 ret = -EINVAL;
487 goto rereg_phys_mr_exit0;
488 }
489
490 /* check other parameters */
491 if (e_mr == shca->maxmr) {
492 /* should be impossible, however reject to be sure */
493 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
494 "shca->maxmr=%p mr->lkey=%x",
495 mr, shca->maxmr, mr->lkey);
496 ret = -EINVAL;
497 goto rereg_phys_mr_exit0;
498 }
499 if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
500 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
501 ehca_err(mr->device, "not supported for FMR, mr=%p "
502 "flags=%x", mr, e_mr->flags);
503 ret = -EINVAL;
504 goto rereg_phys_mr_exit0;
505 }
506 if (!phys_buf_array || num_phys_buf <= 0) {
507 ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
508 " phys_buf_array=%p num_phys_buf=%x",
509 mr_rereg_mask, phys_buf_array, num_phys_buf);
510 ret = -EINVAL;
511 goto rereg_phys_mr_exit0;
512 }
513 }
514 if ((mr_rereg_mask & IB_MR_REREG_ACCESS) && /* change ACL */
515 (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
516 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
517 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
518 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
519 /*
520 * Remote Write Access requires Local Write Access
521 * Remote Atomic Access requires Local Write Access
522 */
523 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
524 "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
525 ret = -EINVAL;
526 goto rereg_phys_mr_exit0;
527 }
528
529 /* set requested values dependent on rereg request */
530 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
531 new_start = e_mr->start;
532 new_size = e_mr->size;
533 new_acl = e_mr->acl;
534 new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
535
536 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
537 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
538
539 new_start = iova_start; /* change address */
540 /* check physical buffer list and calculate size */
541 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
542 num_phys_buf, iova_start,
543 &new_size);
544 if (ret)
545 goto rereg_phys_mr_exit1;
546 if ((new_size == 0) ||
547 (((u64)iova_start + new_size) < (u64)iova_start)) {
548 ehca_err(mr->device, "bad input values: new_size=%llx "
549 "iova_start=%p", new_size, iova_start);
550 ret = -EINVAL;
551 goto rereg_phys_mr_exit1;
552 }
553 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
554 new_size, PAGE_SIZE);
555 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
556 new_size, hw_pgsize);
557 memset(&pginfo, 0, sizeof(pginfo));
558 pginfo.type = EHCA_MR_PGI_PHYS;
559 pginfo.num_kpages = num_kpages;
560 pginfo.hwpage_size = hw_pgsize;
561 pginfo.num_hwpages = num_hwpages;
562 pginfo.u.phy.num_phys_buf = num_phys_buf;
563 pginfo.u.phy.phys_buf_array = phys_buf_array;
564 pginfo.next_hwpage =
565 ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
566 }
567 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
568 new_acl = mr_access_flags;
569 if (mr_rereg_mask & IB_MR_REREG_PD)
570 new_pd = container_of(pd, struct ehca_pd, ib_pd);
571
572 ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
573 new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
574 if (ret)
575 goto rereg_phys_mr_exit1;
576
577 /* successful reregistration */
578 if (mr_rereg_mask & IB_MR_REREG_PD)
579 mr->pd = pd;
580 mr->lkey = tmp_lkey;
581 mr->rkey = tmp_rkey;
582
583 rereg_phys_mr_exit1:
584 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
585 rereg_phys_mr_exit0:
586 if (ret)
587 ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p "
588 "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
589 "iova_start=%p",
590 ret, mr, mr_rereg_mask, pd, phys_buf_array,
591 num_phys_buf, mr_access_flags, iova_start);
592 return ret;
593 } /* end ehca_rereg_phys_mr() */
594
595 /*----------------------------------------------------------------------*/
596
ehca_query_mr(struct ib_mr * mr,struct ib_mr_attr * mr_attr)597 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
598 {
599 int ret = 0;
600 u64 h_ret;
601 struct ehca_shca *shca =
602 container_of(mr->device, struct ehca_shca, ib_device);
603 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
604 unsigned long sl_flags;
605 struct ehca_mr_hipzout_parms hipzout;
606
607 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
608 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
609 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
610 ret = -EINVAL;
611 goto query_mr_exit0;
612 }
613
614 memset(mr_attr, 0, sizeof(struct ib_mr_attr));
615 spin_lock_irqsave(&e_mr->mrlock, sl_flags);
616
617 h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
618 if (h_ret != H_SUCCESS) {
619 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lli mr=%p "
620 "hca_hndl=%llx mr_hndl=%llx lkey=%x",
621 h_ret, mr, shca->ipz_hca_handle.handle,
622 e_mr->ipz_mr_handle.handle, mr->lkey);
623 ret = ehca2ib_return_code(h_ret);
624 goto query_mr_exit1;
625 }
626 mr_attr->pd = mr->pd;
627 mr_attr->device_virt_addr = hipzout.vaddr;
628 mr_attr->size = hipzout.len;
629 mr_attr->lkey = hipzout.lkey;
630 mr_attr->rkey = hipzout.rkey;
631 ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
632
633 query_mr_exit1:
634 spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
635 query_mr_exit0:
636 if (ret)
637 ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p",
638 ret, mr, mr_attr);
639 return ret;
640 } /* end ehca_query_mr() */
641
642 /*----------------------------------------------------------------------*/
643
ehca_dereg_mr(struct ib_mr * mr)644 int ehca_dereg_mr(struct ib_mr *mr)
645 {
646 int ret = 0;
647 u64 h_ret;
648 struct ehca_shca *shca =
649 container_of(mr->device, struct ehca_shca, ib_device);
650 struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
651
652 if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
653 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
654 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
655 ret = -EINVAL;
656 goto dereg_mr_exit0;
657 } else if (e_mr == shca->maxmr) {
658 /* should be impossible, however reject to be sure */
659 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
660 "shca->maxmr=%p mr->lkey=%x",
661 mr, shca->maxmr, mr->lkey);
662 ret = -EINVAL;
663 goto dereg_mr_exit0;
664 }
665
666 /* TODO: BUSY: MR still has bound window(s) */
667 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
668 if (h_ret != H_SUCCESS) {
669 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lli shca=%p "
670 "e_mr=%p hca_hndl=%llx mr_hndl=%llx mr->lkey=%x",
671 h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
672 e_mr->ipz_mr_handle.handle, mr->lkey);
673 ret = ehca2ib_return_code(h_ret);
674 goto dereg_mr_exit0;
675 }
676
677 if (e_mr->umem)
678 ib_umem_release(e_mr->umem);
679
680 /* successful deregistration */
681 ehca_mr_delete(e_mr);
682
683 dereg_mr_exit0:
684 if (ret)
685 ehca_err(mr->device, "ret=%i mr=%p", ret, mr);
686 return ret;
687 } /* end ehca_dereg_mr() */
688
689 /*----------------------------------------------------------------------*/
690
ehca_alloc_mw(struct ib_pd * pd,enum ib_mw_type type)691 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
692 {
693 struct ib_mw *ib_mw;
694 u64 h_ret;
695 struct ehca_mw *e_mw;
696 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
697 struct ehca_shca *shca =
698 container_of(pd->device, struct ehca_shca, ib_device);
699 struct ehca_mw_hipzout_parms hipzout;
700
701 if (type != IB_MW_TYPE_1)
702 return ERR_PTR(-EINVAL);
703
704 e_mw = ehca_mw_new();
705 if (!e_mw) {
706 ib_mw = ERR_PTR(-ENOMEM);
707 goto alloc_mw_exit0;
708 }
709
710 h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
711 e_pd->fw_pd, &hipzout);
712 if (h_ret != H_SUCCESS) {
713 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lli "
714 "shca=%p hca_hndl=%llx mw=%p",
715 h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
716 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
717 goto alloc_mw_exit1;
718 }
719 /* successful MW allocation */
720 e_mw->ipz_mw_handle = hipzout.handle;
721 e_mw->ib_mw.rkey = hipzout.rkey;
722 return &e_mw->ib_mw;
723
724 alloc_mw_exit1:
725 ehca_mw_delete(e_mw);
726 alloc_mw_exit0:
727 if (IS_ERR(ib_mw))
728 ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd);
729 return ib_mw;
730 } /* end ehca_alloc_mw() */
731
732 /*----------------------------------------------------------------------*/
733
ehca_bind_mw(struct ib_qp * qp,struct ib_mw * mw,struct ib_mw_bind * mw_bind)734 int ehca_bind_mw(struct ib_qp *qp,
735 struct ib_mw *mw,
736 struct ib_mw_bind *mw_bind)
737 {
738 /* TODO: not supported up to now */
739 ehca_gen_err("bind MW currently not supported by HCAD");
740
741 return -EPERM;
742 } /* end ehca_bind_mw() */
743
744 /*----------------------------------------------------------------------*/
745
ehca_dealloc_mw(struct ib_mw * mw)746 int ehca_dealloc_mw(struct ib_mw *mw)
747 {
748 u64 h_ret;
749 struct ehca_shca *shca =
750 container_of(mw->device, struct ehca_shca, ib_device);
751 struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
752
753 h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
754 if (h_ret != H_SUCCESS) {
755 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lli shca=%p "
756 "mw=%p rkey=%x hca_hndl=%llx mw_hndl=%llx",
757 h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
758 e_mw->ipz_mw_handle.handle);
759 return ehca2ib_return_code(h_ret);
760 }
761 /* successful deallocation */
762 ehca_mw_delete(e_mw);
763 return 0;
764 } /* end ehca_dealloc_mw() */
765
766 /*----------------------------------------------------------------------*/
767
ehca_alloc_fmr(struct ib_pd * pd,int mr_access_flags,struct ib_fmr_attr * fmr_attr)768 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
769 int mr_access_flags,
770 struct ib_fmr_attr *fmr_attr)
771 {
772 struct ib_fmr *ib_fmr;
773 struct ehca_shca *shca =
774 container_of(pd->device, struct ehca_shca, ib_device);
775 struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
776 struct ehca_mr *e_fmr;
777 int ret;
778 u32 tmp_lkey, tmp_rkey;
779 struct ehca_mr_pginfo pginfo;
780 u64 hw_pgsize;
781
782 /* check other parameters */
783 if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
784 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
785 ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
786 !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
787 /*
788 * Remote Write Access requires Local Write Access
789 * Remote Atomic Access requires Local Write Access
790 */
791 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
792 mr_access_flags);
793 ib_fmr = ERR_PTR(-EINVAL);
794 goto alloc_fmr_exit0;
795 }
796 if (mr_access_flags & IB_ACCESS_MW_BIND) {
797 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
798 mr_access_flags);
799 ib_fmr = ERR_PTR(-EINVAL);
800 goto alloc_fmr_exit0;
801 }
802 if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
803 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
804 "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
805 fmr_attr->max_pages, fmr_attr->max_maps,
806 fmr_attr->page_shift);
807 ib_fmr = ERR_PTR(-EINVAL);
808 goto alloc_fmr_exit0;
809 }
810
811 hw_pgsize = 1 << fmr_attr->page_shift;
812 if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) {
813 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
814 fmr_attr->page_shift);
815 ib_fmr = ERR_PTR(-EINVAL);
816 goto alloc_fmr_exit0;
817 }
818
819 e_fmr = ehca_mr_new();
820 if (!e_fmr) {
821 ib_fmr = ERR_PTR(-ENOMEM);
822 goto alloc_fmr_exit0;
823 }
824 e_fmr->flags |= EHCA_MR_FLAG_FMR;
825
826 /* register MR on HCA */
827 memset(&pginfo, 0, sizeof(pginfo));
828 pginfo.hwpage_size = hw_pgsize;
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, EHCA_REG_MR);
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
ehca_map_phys_fmr(struct ib_fmr * fmr,u64 * page_list,int list_len,u64 iova)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=%llx 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=%llx", ret, fmr, page_list, list_len, iova);
921 return ret;
922 } /* end ehca_map_phys_fmr() */
923
924 /*----------------------------------------------------------------------*/
925
ehca_unmap_fmr(struct list_head * fmr_list)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 shca = container_of(ib_fmr->device, struct ehca_shca,
940 ib_device);
941 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
942 if ((shca != prev_shca) && prev_shca) {
943 ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
944 "prev_shca=%p e_fmr=%p",
945 shca, prev_shca, e_fmr);
946 ret = -EINVAL;
947 goto unmap_fmr_exit0;
948 }
949 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
950 ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
951 "e_fmr->flags=%x", e_fmr, e_fmr->flags);
952 ret = -EINVAL;
953 goto unmap_fmr_exit0;
954 }
955 num_fmr++;
956 }
957
958 /* loop over all FMRs to unmap */
959 list_for_each_entry(ib_fmr, fmr_list, list) {
960 unmap_fmr_cnt++;
961 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
962 shca = container_of(ib_fmr->device, struct ehca_shca,
963 ib_device);
964 ret = ehca_unmap_one_fmr(shca, e_fmr);
965 if (ret) {
966 /* unmap failed, stop unmapping of rest of FMRs */
967 ehca_err(&shca->ib_device, "unmap of one FMR failed, "
968 "stop rest, e_fmr=%p num_fmr=%x "
969 "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
970 unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
971 goto unmap_fmr_exit0;
972 }
973 }
974
975 unmap_fmr_exit0:
976 if (ret)
977 ehca_gen_err("ret=%i fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
978 ret, fmr_list, num_fmr, unmap_fmr_cnt);
979 return ret;
980 } /* end ehca_unmap_fmr() */
981
982 /*----------------------------------------------------------------------*/
983
ehca_dealloc_fmr(struct ib_fmr * fmr)984 int ehca_dealloc_fmr(struct ib_fmr *fmr)
985 {
986 int ret;
987 u64 h_ret;
988 struct ehca_shca *shca =
989 container_of(fmr->device, struct ehca_shca, ib_device);
990 struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
991
992 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
993 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
994 e_fmr, e_fmr->flags);
995 ret = -EINVAL;
996 goto free_fmr_exit0;
997 }
998
999 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1000 if (h_ret != H_SUCCESS) {
1001 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lli e_fmr=%p "
1002 "hca_hndl=%llx fmr_hndl=%llx fmr->lkey=%x",
1003 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1004 e_fmr->ipz_mr_handle.handle, fmr->lkey);
1005 ret = ehca2ib_return_code(h_ret);
1006 goto free_fmr_exit0;
1007 }
1008 /* successful deregistration */
1009 ehca_mr_delete(e_fmr);
1010 return 0;
1011
1012 free_fmr_exit0:
1013 if (ret)
1014 ehca_err(&shca->ib_device, "ret=%i fmr=%p", ret, fmr);
1015 return ret;
1016 } /* end ehca_dealloc_fmr() */
1017
1018 /*----------------------------------------------------------------------*/
1019
1020 static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca,
1021 struct ehca_mr *e_mr,
1022 struct ehca_mr_pginfo *pginfo);
1023
ehca_reg_mr(struct ehca_shca * shca,struct ehca_mr * e_mr,u64 * iova_start,u64 size,int acl,struct ehca_pd * e_pd,struct ehca_mr_pginfo * pginfo,u32 * lkey,u32 * rkey,enum ehca_reg_type reg_type)1024 int ehca_reg_mr(struct ehca_shca *shca,
1025 struct ehca_mr *e_mr,
1026 u64 *iova_start,
1027 u64 size,
1028 int acl,
1029 struct ehca_pd *e_pd,
1030 struct ehca_mr_pginfo *pginfo,
1031 u32 *lkey, /*OUT*/
1032 u32 *rkey, /*OUT*/
1033 enum ehca_reg_type reg_type)
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=%lli "
1050 "hca_hndl=%llx", 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 if (reg_type == EHCA_REG_BUSMAP_MR)
1058 ret = ehca_reg_bmap_mr_rpages(shca, e_mr, pginfo);
1059 else if (reg_type == EHCA_REG_MR)
1060 ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1061 else
1062 ret = -EINVAL;
1063
1064 if (ret)
1065 goto ehca_reg_mr_exit1;
1066
1067 /* successful registration */
1068 e_mr->num_kpages = pginfo->num_kpages;
1069 e_mr->num_hwpages = pginfo->num_hwpages;
1070 e_mr->hwpage_size = pginfo->hwpage_size;
1071 e_mr->start = iova_start;
1072 e_mr->size = size;
1073 e_mr->acl = acl;
1074 *lkey = hipzout.lkey;
1075 *rkey = hipzout.rkey;
1076 return 0;
1077
1078 ehca_reg_mr_exit1:
1079 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1080 if (h_ret != H_SUCCESS) {
1081 ehca_err(&shca->ib_device, "h_ret=%lli shca=%p e_mr=%p "
1082 "iova_start=%p size=%llx acl=%x e_pd=%p lkey=%x "
1083 "pginfo=%p num_kpages=%llx num_hwpages=%llx ret=%i",
1084 h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1085 hipzout.lkey, pginfo, pginfo->num_kpages,
1086 pginfo->num_hwpages, ret);
1087 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1088 "not recoverable");
1089 }
1090 ehca_reg_mr_exit0:
1091 if (ret)
1092 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1093 "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p "
1094 "num_kpages=%llx num_hwpages=%llx",
1095 ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1096 pginfo->num_kpages, pginfo->num_hwpages);
1097 return ret;
1098 } /* end ehca_reg_mr() */
1099
1100 /*----------------------------------------------------------------------*/
1101
ehca_reg_mr_rpages(struct ehca_shca * shca,struct ehca_mr * e_mr,struct ehca_mr_pginfo * pginfo)1102 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1103 struct ehca_mr *e_mr,
1104 struct ehca_mr_pginfo *pginfo)
1105 {
1106 int ret = 0;
1107 u64 h_ret;
1108 u32 rnum;
1109 u64 rpage;
1110 u32 i;
1111 u64 *kpage;
1112
1113 if (!pginfo->num_hwpages) /* in case of fmr */
1114 return 0;
1115
1116 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1117 if (!kpage) {
1118 ehca_err(&shca->ib_device, "kpage alloc failed");
1119 ret = -ENOMEM;
1120 goto ehca_reg_mr_rpages_exit0;
1121 }
1122
1123 /* max MAX_RPAGES ehca mr pages per register call */
1124 for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1125
1126 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1127 rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1128 if (rnum == 0)
1129 rnum = MAX_RPAGES; /* last shot is full */
1130 } else
1131 rnum = MAX_RPAGES;
1132
1133 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1134 if (ret) {
1135 ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1136 "bad rc, ret=%i rnum=%x kpage=%p",
1137 ret, rnum, kpage);
1138 goto ehca_reg_mr_rpages_exit1;
1139 }
1140
1141 if (rnum > 1) {
1142 rpage = __pa(kpage);
1143 if (!rpage) {
1144 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1145 kpage, i);
1146 ret = -EFAULT;
1147 goto ehca_reg_mr_rpages_exit1;
1148 }
1149 } else
1150 rpage = *kpage;
1151
1152 h_ret = hipz_h_register_rpage_mr(
1153 shca->ipz_hca_handle, e_mr,
1154 ehca_encode_hwpage_size(pginfo->hwpage_size),
1155 0, rpage, rnum);
1156
1157 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1158 /*
1159 * check for 'registration complete'==H_SUCCESS
1160 * and for 'page registered'==H_PAGE_REGISTERED
1161 */
1162 if (h_ret != H_SUCCESS) {
1163 ehca_err(&shca->ib_device, "last "
1164 "hipz_reg_rpage_mr failed, h_ret=%lli "
1165 "e_mr=%p i=%x hca_hndl=%llx mr_hndl=%llx"
1166 " lkey=%x", h_ret, e_mr, i,
1167 shca->ipz_hca_handle.handle,
1168 e_mr->ipz_mr_handle.handle,
1169 e_mr->ib.ib_mr.lkey);
1170 ret = ehca2ib_return_code(h_ret);
1171 break;
1172 } else
1173 ret = 0;
1174 } else if (h_ret != H_PAGE_REGISTERED) {
1175 ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1176 "h_ret=%lli e_mr=%p i=%x lkey=%x hca_hndl=%llx "
1177 "mr_hndl=%llx", h_ret, e_mr, i,
1178 e_mr->ib.ib_mr.lkey,
1179 shca->ipz_hca_handle.handle,
1180 e_mr->ipz_mr_handle.handle);
1181 ret = ehca2ib_return_code(h_ret);
1182 break;
1183 } else
1184 ret = 0;
1185 } /* end for(i) */
1186
1187
1188 ehca_reg_mr_rpages_exit1:
1189 ehca_free_fw_ctrlblock(kpage);
1190 ehca_reg_mr_rpages_exit0:
1191 if (ret)
1192 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p pginfo=%p "
1193 "num_kpages=%llx num_hwpages=%llx", ret, shca, e_mr,
1194 pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1195 return ret;
1196 } /* end ehca_reg_mr_rpages() */
1197
1198 /*----------------------------------------------------------------------*/
1199
ehca_rereg_mr_rereg1(struct ehca_shca * shca,struct ehca_mr * e_mr,u64 * iova_start,u64 size,u32 acl,struct ehca_pd * e_pd,struct ehca_mr_pginfo * pginfo,u32 * lkey,u32 * rkey)1200 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1201 struct ehca_mr *e_mr,
1202 u64 *iova_start,
1203 u64 size,
1204 u32 acl,
1205 struct ehca_pd *e_pd,
1206 struct ehca_mr_pginfo *pginfo,
1207 u32 *lkey, /*OUT*/
1208 u32 *rkey) /*OUT*/
1209 {
1210 int ret;
1211 u64 h_ret;
1212 u32 hipz_acl;
1213 u64 *kpage;
1214 u64 rpage;
1215 struct ehca_mr_pginfo pginfo_save;
1216 struct ehca_mr_hipzout_parms hipzout;
1217
1218 ehca_mrmw_map_acl(acl, &hipz_acl);
1219 ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1220
1221 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1222 if (!kpage) {
1223 ehca_err(&shca->ib_device, "kpage alloc failed");
1224 ret = -ENOMEM;
1225 goto ehca_rereg_mr_rereg1_exit0;
1226 }
1227
1228 pginfo_save = *pginfo;
1229 ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1230 if (ret) {
1231 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1232 "pginfo=%p type=%x num_kpages=%llx num_hwpages=%llx "
1233 "kpage=%p", e_mr, pginfo, pginfo->type,
1234 pginfo->num_kpages, pginfo->num_hwpages, kpage);
1235 goto ehca_rereg_mr_rereg1_exit1;
1236 }
1237 rpage = __pa(kpage);
1238 if (!rpage) {
1239 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1240 ret = -EFAULT;
1241 goto ehca_rereg_mr_rereg1_exit1;
1242 }
1243 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1244 (u64)iova_start, size, hipz_acl,
1245 e_pd->fw_pd, rpage, &hipzout);
1246 if (h_ret != H_SUCCESS) {
1247 /*
1248 * reregistration unsuccessful, try it again with the 3 hCalls,
1249 * e.g. this is required in case H_MR_CONDITION
1250 * (MW bound or MR is shared)
1251 */
1252 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1253 "(Rereg1), h_ret=%lli e_mr=%p", h_ret, e_mr);
1254 *pginfo = pginfo_save;
1255 ret = -EAGAIN;
1256 } else if ((u64 *)hipzout.vaddr != iova_start) {
1257 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1258 "rereg_pmr, iova_start=%p iova_start_out=%llx e_mr=%p "
1259 "mr_handle=%llx lkey=%x lkey_out=%x", iova_start,
1260 hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1261 e_mr->ib.ib_mr.lkey, hipzout.lkey);
1262 ret = -EFAULT;
1263 } else {
1264 /*
1265 * successful reregistration
1266 * note: start and start_out are identical for eServer HCAs
1267 */
1268 e_mr->num_kpages = pginfo->num_kpages;
1269 e_mr->num_hwpages = pginfo->num_hwpages;
1270 e_mr->hwpage_size = pginfo->hwpage_size;
1271 e_mr->start = iova_start;
1272 e_mr->size = size;
1273 e_mr->acl = acl;
1274 *lkey = hipzout.lkey;
1275 *rkey = hipzout.rkey;
1276 }
1277
1278 ehca_rereg_mr_rereg1_exit1:
1279 ehca_free_fw_ctrlblock(kpage);
1280 ehca_rereg_mr_rereg1_exit0:
1281 if ( ret && (ret != -EAGAIN) )
1282 ehca_err(&shca->ib_device, "ret=%i lkey=%x rkey=%x "
1283 "pginfo=%p num_kpages=%llx num_hwpages=%llx",
1284 ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1285 pginfo->num_hwpages);
1286 return ret;
1287 } /* end ehca_rereg_mr_rereg1() */
1288
1289 /*----------------------------------------------------------------------*/
1290
ehca_rereg_mr(struct ehca_shca * shca,struct ehca_mr * e_mr,u64 * iova_start,u64 size,int acl,struct ehca_pd * e_pd,struct ehca_mr_pginfo * pginfo,u32 * lkey,u32 * rkey)1291 int ehca_rereg_mr(struct ehca_shca *shca,
1292 struct ehca_mr *e_mr,
1293 u64 *iova_start,
1294 u64 size,
1295 int acl,
1296 struct ehca_pd *e_pd,
1297 struct ehca_mr_pginfo *pginfo,
1298 u32 *lkey,
1299 u32 *rkey)
1300 {
1301 int ret = 0;
1302 u64 h_ret;
1303 int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1304 int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1305
1306 /* first determine reregistration hCall(s) */
1307 if ((pginfo->num_hwpages > MAX_RPAGES) ||
1308 (e_mr->num_hwpages > MAX_RPAGES) ||
1309 (pginfo->num_hwpages > e_mr->num_hwpages)) {
1310 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1311 "pginfo->num_hwpages=%llx e_mr->num_hwpages=%x",
1312 pginfo->num_hwpages, e_mr->num_hwpages);
1313 rereg_1_hcall = 0;
1314 rereg_3_hcall = 1;
1315 }
1316
1317 if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1318 rereg_1_hcall = 0;
1319 rereg_3_hcall = 1;
1320 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1321 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1322 e_mr);
1323 }
1324
1325 if (rereg_1_hcall) {
1326 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1327 acl, e_pd, pginfo, lkey, rkey);
1328 if (ret) {
1329 if (ret == -EAGAIN)
1330 rereg_3_hcall = 1;
1331 else
1332 goto ehca_rereg_mr_exit0;
1333 }
1334 }
1335
1336 if (rereg_3_hcall) {
1337 struct ehca_mr save_mr;
1338
1339 /* first deregister old MR */
1340 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1341 if (h_ret != H_SUCCESS) {
1342 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1343 "h_ret=%lli e_mr=%p hca_hndl=%llx mr_hndl=%llx "
1344 "mr->lkey=%x",
1345 h_ret, e_mr, shca->ipz_hca_handle.handle,
1346 e_mr->ipz_mr_handle.handle,
1347 e_mr->ib.ib_mr.lkey);
1348 ret = ehca2ib_return_code(h_ret);
1349 goto ehca_rereg_mr_exit0;
1350 }
1351 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1352 save_mr = *e_mr;
1353 ehca_mr_deletenew(e_mr);
1354
1355 /* set some MR values */
1356 e_mr->flags = save_mr.flags;
1357 e_mr->hwpage_size = save_mr.hwpage_size;
1358 e_mr->fmr_page_size = save_mr.fmr_page_size;
1359 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1360 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1361 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1362
1363 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1364 e_pd, pginfo, lkey, rkey, EHCA_REG_MR);
1365 if (ret) {
1366 u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1367 memcpy(&e_mr->flags, &(save_mr.flags),
1368 sizeof(struct ehca_mr) - offset);
1369 goto ehca_rereg_mr_exit0;
1370 }
1371 }
1372
1373 ehca_rereg_mr_exit0:
1374 if (ret)
1375 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1376 "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p "
1377 "num_kpages=%llx lkey=%x rkey=%x rereg_1_hcall=%x "
1378 "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1379 acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1380 rereg_1_hcall, rereg_3_hcall);
1381 return ret;
1382 } /* end ehca_rereg_mr() */
1383
1384 /*----------------------------------------------------------------------*/
1385
ehca_unmap_one_fmr(struct ehca_shca * shca,struct ehca_mr * e_fmr)1386 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1387 struct ehca_mr *e_fmr)
1388 {
1389 int ret = 0;
1390 u64 h_ret;
1391 struct ehca_pd *e_pd =
1392 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1393 struct ehca_mr save_fmr;
1394 u32 tmp_lkey, tmp_rkey;
1395 struct ehca_mr_pginfo pginfo;
1396 struct ehca_mr_hipzout_parms hipzout;
1397 struct ehca_mr save_mr;
1398
1399 if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1400 /*
1401 * note: after using rereg hcall with len=0,
1402 * rereg hcall must be used again for registering pages
1403 */
1404 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1405 0, 0, e_pd->fw_pd, 0, &hipzout);
1406 if (h_ret == H_SUCCESS) {
1407 /* successful reregistration */
1408 e_fmr->start = NULL;
1409 e_fmr->size = 0;
1410 tmp_lkey = hipzout.lkey;
1411 tmp_rkey = hipzout.rkey;
1412 return 0;
1413 }
1414 /*
1415 * should not happen, because length checked above,
1416 * FMRs are not shared and no MW bound to FMRs
1417 */
1418 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1419 "(Rereg1), h_ret=%lli e_fmr=%p hca_hndl=%llx "
1420 "mr_hndl=%llx lkey=%x lkey_out=%x",
1421 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1422 e_fmr->ipz_mr_handle.handle,
1423 e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1424 /* try free and rereg */
1425 }
1426
1427 /* first free old FMR */
1428 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1429 if (h_ret != H_SUCCESS) {
1430 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1431 "h_ret=%lli e_fmr=%p hca_hndl=%llx mr_hndl=%llx "
1432 "lkey=%x",
1433 h_ret, e_fmr, shca->ipz_hca_handle.handle,
1434 e_fmr->ipz_mr_handle.handle,
1435 e_fmr->ib.ib_fmr.lkey);
1436 ret = ehca2ib_return_code(h_ret);
1437 goto ehca_unmap_one_fmr_exit0;
1438 }
1439 /* clean ehca_mr_t, without changing lock */
1440 save_fmr = *e_fmr;
1441 ehca_mr_deletenew(e_fmr);
1442
1443 /* set some MR values */
1444 e_fmr->flags = save_fmr.flags;
1445 e_fmr->hwpage_size = save_fmr.hwpage_size;
1446 e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1447 e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1448 e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1449 e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1450 e_fmr->acl = save_fmr.acl;
1451
1452 memset(&pginfo, 0, sizeof(pginfo));
1453 pginfo.type = EHCA_MR_PGI_FMR;
1454 ret = ehca_reg_mr(shca, e_fmr, NULL,
1455 (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1456 e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1457 &tmp_rkey, EHCA_REG_MR);
1458 if (ret) {
1459 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1460 memcpy(&e_fmr->flags, &(save_mr.flags),
1461 sizeof(struct ehca_mr) - offset);
1462 }
1463
1464 ehca_unmap_one_fmr_exit0:
1465 if (ret)
1466 ehca_err(&shca->ib_device, "ret=%i tmp_lkey=%x tmp_rkey=%x "
1467 "fmr_max_pages=%x",
1468 ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1469 return ret;
1470 } /* end ehca_unmap_one_fmr() */
1471
1472 /*----------------------------------------------------------------------*/
1473
ehca_reg_smr(struct ehca_shca * shca,struct ehca_mr * e_origmr,struct ehca_mr * e_newmr,u64 * iova_start,int acl,struct ehca_pd * e_pd,u32 * lkey,u32 * rkey)1474 int ehca_reg_smr(struct ehca_shca *shca,
1475 struct ehca_mr *e_origmr,
1476 struct ehca_mr *e_newmr,
1477 u64 *iova_start,
1478 int acl,
1479 struct ehca_pd *e_pd,
1480 u32 *lkey, /*OUT*/
1481 u32 *rkey) /*OUT*/
1482 {
1483 int ret = 0;
1484 u64 h_ret;
1485 u32 hipz_acl;
1486 struct ehca_mr_hipzout_parms hipzout;
1487
1488 ehca_mrmw_map_acl(acl, &hipz_acl);
1489 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1490
1491 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1492 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1493 &hipzout);
1494 if (h_ret != H_SUCCESS) {
1495 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli "
1496 "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1497 "e_pd=%p hca_hndl=%llx mr_hndl=%llx lkey=%x",
1498 h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1499 shca->ipz_hca_handle.handle,
1500 e_origmr->ipz_mr_handle.handle,
1501 e_origmr->ib.ib_mr.lkey);
1502 ret = ehca2ib_return_code(h_ret);
1503 goto ehca_reg_smr_exit0;
1504 }
1505 /* successful registration */
1506 e_newmr->num_kpages = e_origmr->num_kpages;
1507 e_newmr->num_hwpages = e_origmr->num_hwpages;
1508 e_newmr->hwpage_size = e_origmr->hwpage_size;
1509 e_newmr->start = iova_start;
1510 e_newmr->size = e_origmr->size;
1511 e_newmr->acl = acl;
1512 e_newmr->ipz_mr_handle = hipzout.handle;
1513 *lkey = hipzout.lkey;
1514 *rkey = hipzout.rkey;
1515 return 0;
1516
1517 ehca_reg_smr_exit0:
1518 if (ret)
1519 ehca_err(&shca->ib_device, "ret=%i shca=%p e_origmr=%p "
1520 "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1521 ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1522 return ret;
1523 } /* end ehca_reg_smr() */
1524
1525 /*----------------------------------------------------------------------*/
ehca_calc_sectbase(int top,int dir,int idx)1526 static inline void *ehca_calc_sectbase(int top, int dir, int idx)
1527 {
1528 unsigned long ret = idx;
1529 ret |= dir << EHCA_DIR_INDEX_SHIFT;
1530 ret |= top << EHCA_TOP_INDEX_SHIFT;
1531 return __va(ret << SECTION_SIZE_BITS);
1532 }
1533
1534 #define ehca_bmap_valid(entry) \
1535 ((u64)entry != (u64)EHCA_INVAL_ADDR)
1536
ehca_reg_mr_section(int top,int dir,int idx,u64 * kpage,struct ehca_shca * shca,struct ehca_mr * mr,struct ehca_mr_pginfo * pginfo)1537 static u64 ehca_reg_mr_section(int top, int dir, int idx, u64 *kpage,
1538 struct ehca_shca *shca, struct ehca_mr *mr,
1539 struct ehca_mr_pginfo *pginfo)
1540 {
1541 u64 h_ret = 0;
1542 unsigned long page = 0;
1543 u64 rpage = __pa(kpage);
1544 int page_count;
1545
1546 void *sectbase = ehca_calc_sectbase(top, dir, idx);
1547 if ((unsigned long)sectbase & (pginfo->hwpage_size - 1)) {
1548 ehca_err(&shca->ib_device, "reg_mr_section will probably fail:"
1549 "hwpage_size does not fit to "
1550 "section start address");
1551 }
1552 page_count = EHCA_SECTSIZE / pginfo->hwpage_size;
1553
1554 while (page < page_count) {
1555 u64 rnum;
1556 for (rnum = 0; (rnum < MAX_RPAGES) && (page < page_count);
1557 rnum++) {
1558 void *pg = sectbase + ((page++) * pginfo->hwpage_size);
1559 kpage[rnum] = __pa(pg);
1560 }
1561
1562 h_ret = hipz_h_register_rpage_mr(shca->ipz_hca_handle, mr,
1563 ehca_encode_hwpage_size(pginfo->hwpage_size),
1564 0, rpage, rnum);
1565
1566 if ((h_ret != H_SUCCESS) && (h_ret != H_PAGE_REGISTERED)) {
1567 ehca_err(&shca->ib_device, "register_rpage_mr failed");
1568 return h_ret;
1569 }
1570 }
1571 return h_ret;
1572 }
1573
ehca_reg_mr_sections(int top,int dir,u64 * kpage,struct ehca_shca * shca,struct ehca_mr * mr,struct ehca_mr_pginfo * pginfo)1574 static u64 ehca_reg_mr_sections(int top, int dir, u64 *kpage,
1575 struct ehca_shca *shca, struct ehca_mr *mr,
1576 struct ehca_mr_pginfo *pginfo)
1577 {
1578 u64 hret = H_SUCCESS;
1579 int idx;
1580
1581 for (idx = 0; idx < EHCA_MAP_ENTRIES; idx++) {
1582 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]->ent[idx]))
1583 continue;
1584
1585 hret = ehca_reg_mr_section(top, dir, idx, kpage, shca, mr,
1586 pginfo);
1587 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
1588 return hret;
1589 }
1590 return hret;
1591 }
1592
ehca_reg_mr_dir_sections(int top,u64 * kpage,struct ehca_shca * shca,struct ehca_mr * mr,struct ehca_mr_pginfo * pginfo)1593 static u64 ehca_reg_mr_dir_sections(int top, u64 *kpage, struct ehca_shca *shca,
1594 struct ehca_mr *mr,
1595 struct ehca_mr_pginfo *pginfo)
1596 {
1597 u64 hret = H_SUCCESS;
1598 int dir;
1599
1600 for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) {
1601 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
1602 continue;
1603
1604 hret = ehca_reg_mr_sections(top, dir, kpage, shca, mr, pginfo);
1605 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
1606 return hret;
1607 }
1608 return hret;
1609 }
1610
1611 /* register internal max-MR to internal SHCA */
ehca_reg_internal_maxmr(struct ehca_shca * shca,struct ehca_pd * e_pd,struct ehca_mr ** e_maxmr)1612 int ehca_reg_internal_maxmr(
1613 struct ehca_shca *shca,
1614 struct ehca_pd *e_pd,
1615 struct ehca_mr **e_maxmr) /*OUT*/
1616 {
1617 int ret;
1618 struct ehca_mr *e_mr;
1619 u64 *iova_start;
1620 u64 size_maxmr;
1621 struct ehca_mr_pginfo pginfo;
1622 struct ib_phys_buf ib_pbuf;
1623 u32 num_kpages;
1624 u32 num_hwpages;
1625 u64 hw_pgsize;
1626
1627 if (!ehca_bmap) {
1628 ret = -EFAULT;
1629 goto ehca_reg_internal_maxmr_exit0;
1630 }
1631
1632 e_mr = ehca_mr_new();
1633 if (!e_mr) {
1634 ehca_err(&shca->ib_device, "out of memory");
1635 ret = -ENOMEM;
1636 goto ehca_reg_internal_maxmr_exit0;
1637 }
1638 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1639
1640 /* register internal max-MR on HCA */
1641 size_maxmr = ehca_mr_len;
1642 iova_start = (u64 *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START));
1643 ib_pbuf.addr = 0;
1644 ib_pbuf.size = size_maxmr;
1645 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1646 PAGE_SIZE);
1647 hw_pgsize = ehca_get_max_hwpage_size(shca);
1648 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1649 hw_pgsize);
1650
1651 memset(&pginfo, 0, sizeof(pginfo));
1652 pginfo.type = EHCA_MR_PGI_PHYS;
1653 pginfo.num_kpages = num_kpages;
1654 pginfo.num_hwpages = num_hwpages;
1655 pginfo.hwpage_size = hw_pgsize;
1656 pginfo.u.phy.num_phys_buf = 1;
1657 pginfo.u.phy.phys_buf_array = &ib_pbuf;
1658
1659 ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1660 &pginfo, &e_mr->ib.ib_mr.lkey,
1661 &e_mr->ib.ib_mr.rkey, EHCA_REG_BUSMAP_MR);
1662 if (ret) {
1663 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1664 "e_mr=%p iova_start=%p size_maxmr=%llx num_kpages=%x "
1665 "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1666 num_kpages, num_hwpages);
1667 goto ehca_reg_internal_maxmr_exit1;
1668 }
1669
1670 /* successful registration of all pages */
1671 e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1672 e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1673 e_mr->ib.ib_mr.uobject = NULL;
1674 atomic_inc(&(e_pd->ib_pd.usecnt));
1675 atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1676 *e_maxmr = e_mr;
1677 return 0;
1678
1679 ehca_reg_internal_maxmr_exit1:
1680 ehca_mr_delete(e_mr);
1681 ehca_reg_internal_maxmr_exit0:
1682 if (ret)
1683 ehca_err(&shca->ib_device, "ret=%i shca=%p e_pd=%p e_maxmr=%p",
1684 ret, shca, e_pd, e_maxmr);
1685 return ret;
1686 } /* end ehca_reg_internal_maxmr() */
1687
1688 /*----------------------------------------------------------------------*/
1689
ehca_reg_maxmr(struct ehca_shca * shca,struct ehca_mr * e_newmr,u64 * iova_start,int acl,struct ehca_pd * e_pd,u32 * lkey,u32 * rkey)1690 int ehca_reg_maxmr(struct ehca_shca *shca,
1691 struct ehca_mr *e_newmr,
1692 u64 *iova_start,
1693 int acl,
1694 struct ehca_pd *e_pd,
1695 u32 *lkey,
1696 u32 *rkey)
1697 {
1698 u64 h_ret;
1699 struct ehca_mr *e_origmr = shca->maxmr;
1700 u32 hipz_acl;
1701 struct ehca_mr_hipzout_parms hipzout;
1702
1703 ehca_mrmw_map_acl(acl, &hipz_acl);
1704 ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1705
1706 h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1707 (u64)iova_start, hipz_acl, e_pd->fw_pd,
1708 &hipzout);
1709 if (h_ret != H_SUCCESS) {
1710 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli "
1711 "e_origmr=%p hca_hndl=%llx mr_hndl=%llx lkey=%x",
1712 h_ret, e_origmr, shca->ipz_hca_handle.handle,
1713 e_origmr->ipz_mr_handle.handle,
1714 e_origmr->ib.ib_mr.lkey);
1715 return ehca2ib_return_code(h_ret);
1716 }
1717 /* successful registration */
1718 e_newmr->num_kpages = e_origmr->num_kpages;
1719 e_newmr->num_hwpages = e_origmr->num_hwpages;
1720 e_newmr->hwpage_size = e_origmr->hwpage_size;
1721 e_newmr->start = iova_start;
1722 e_newmr->size = e_origmr->size;
1723 e_newmr->acl = acl;
1724 e_newmr->ipz_mr_handle = hipzout.handle;
1725 *lkey = hipzout.lkey;
1726 *rkey = hipzout.rkey;
1727 return 0;
1728 } /* end ehca_reg_maxmr() */
1729
1730 /*----------------------------------------------------------------------*/
1731
ehca_dereg_internal_maxmr(struct ehca_shca * shca)1732 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1733 {
1734 int ret;
1735 struct ehca_mr *e_maxmr;
1736 struct ib_pd *ib_pd;
1737
1738 if (!shca->maxmr) {
1739 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1740 ret = -EINVAL;
1741 goto ehca_dereg_internal_maxmr_exit0;
1742 }
1743
1744 e_maxmr = shca->maxmr;
1745 ib_pd = e_maxmr->ib.ib_mr.pd;
1746 shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1747
1748 ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1749 if (ret) {
1750 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1751 "ret=%i e_maxmr=%p shca=%p lkey=%x",
1752 ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1753 shca->maxmr = e_maxmr;
1754 goto ehca_dereg_internal_maxmr_exit0;
1755 }
1756
1757 atomic_dec(&ib_pd->usecnt);
1758
1759 ehca_dereg_internal_maxmr_exit0:
1760 if (ret)
1761 ehca_err(&shca->ib_device, "ret=%i shca=%p shca->maxmr=%p",
1762 ret, shca, shca->maxmr);
1763 return ret;
1764 } /* end ehca_dereg_internal_maxmr() */
1765
1766 /*----------------------------------------------------------------------*/
1767
1768 /*
1769 * check physical buffer array of MR verbs for validness and
1770 * calculates MR size
1771 */
ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf * phys_buf_array,int num_phys_buf,u64 * iova_start,u64 * size)1772 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1773 int num_phys_buf,
1774 u64 *iova_start,
1775 u64 *size)
1776 {
1777 struct ib_phys_buf *pbuf = phys_buf_array;
1778 u64 size_count = 0;
1779 u32 i;
1780
1781 if (num_phys_buf == 0) {
1782 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1783 return -EINVAL;
1784 }
1785 /* check first buffer */
1786 if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1787 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1788 "pbuf->addr=%llx pbuf->size=%llx",
1789 iova_start, pbuf->addr, pbuf->size);
1790 return -EINVAL;
1791 }
1792 if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1793 (num_phys_buf > 1)) {
1794 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%llx "
1795 "pbuf->size=%llx", pbuf->addr, pbuf->size);
1796 return -EINVAL;
1797 }
1798
1799 for (i = 0; i < num_phys_buf; i++) {
1800 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1801 ehca_gen_err("bad address, i=%x pbuf->addr=%llx "
1802 "pbuf->size=%llx",
1803 i, pbuf->addr, pbuf->size);
1804 return -EINVAL;
1805 }
1806 if (((i > 0) && /* not 1st */
1807 (i < (num_phys_buf - 1)) && /* not last */
1808 (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1809 ehca_gen_err("bad size, i=%x pbuf->size=%llx",
1810 i, pbuf->size);
1811 return -EINVAL;
1812 }
1813 size_count += pbuf->size;
1814 pbuf++;
1815 }
1816
1817 *size = size_count;
1818 return 0;
1819 } /* end ehca_mr_chk_buf_and_calc_size() */
1820
1821 /*----------------------------------------------------------------------*/
1822
1823 /* check page list of map FMR verb for validness */
ehca_fmr_check_page_list(struct ehca_mr * e_fmr,u64 * page_list,int list_len)1824 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1825 u64 *page_list,
1826 int list_len)
1827 {
1828 u32 i;
1829 u64 *page;
1830
1831 if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1832 ehca_gen_err("bad list_len, list_len=%x "
1833 "e_fmr->fmr_max_pages=%x fmr=%p",
1834 list_len, e_fmr->fmr_max_pages, e_fmr);
1835 return -EINVAL;
1836 }
1837
1838 /* each page must be aligned */
1839 page = page_list;
1840 for (i = 0; i < list_len; i++) {
1841 if (*page % e_fmr->fmr_page_size) {
1842 ehca_gen_err("bad page, i=%x *page=%llx page=%p fmr=%p "
1843 "fmr_page_size=%x", i, *page, page, e_fmr,
1844 e_fmr->fmr_page_size);
1845 return -EINVAL;
1846 }
1847 page++;
1848 }
1849
1850 return 0;
1851 } /* end ehca_fmr_check_page_list() */
1852
1853 /*----------------------------------------------------------------------*/
1854
1855 /* PAGE_SIZE >= pginfo->hwpage_size */
ehca_set_pagebuf_user1(struct ehca_mr_pginfo * pginfo,u32 number,u64 * kpage)1856 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1857 u32 number,
1858 u64 *kpage)
1859 {
1860 int ret = 0;
1861 struct ib_umem_chunk *prev_chunk;
1862 struct ib_umem_chunk *chunk;
1863 u64 pgaddr;
1864 u32 i = 0;
1865 u32 j = 0;
1866 int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1867
1868 /* loop over desired chunk entries */
1869 chunk = pginfo->u.usr.next_chunk;
1870 prev_chunk = pginfo->u.usr.next_chunk;
1871 list_for_each_entry_continue(
1872 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1873 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1874 pgaddr = page_to_pfn(sg_page(&chunk->page_list[i]))
1875 << PAGE_SHIFT ;
1876 *kpage = pgaddr + (pginfo->next_hwpage *
1877 pginfo->hwpage_size);
1878 if ( !(*kpage) ) {
1879 ehca_gen_err("pgaddr=%llx "
1880 "chunk->page_list[i]=%llx "
1881 "i=%x next_hwpage=%llx",
1882 pgaddr, (u64)sg_dma_address(
1883 &chunk->page_list[i]),
1884 i, pginfo->next_hwpage);
1885 return -EFAULT;
1886 }
1887 (pginfo->hwpage_cnt)++;
1888 (pginfo->next_hwpage)++;
1889 kpage++;
1890 if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1891 (pginfo->kpage_cnt)++;
1892 (pginfo->u.usr.next_nmap)++;
1893 pginfo->next_hwpage = 0;
1894 i++;
1895 }
1896 j++;
1897 if (j >= number) break;
1898 }
1899 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1900 (j >= number)) {
1901 pginfo->u.usr.next_nmap = 0;
1902 prev_chunk = chunk;
1903 break;
1904 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1905 pginfo->u.usr.next_nmap = 0;
1906 prev_chunk = chunk;
1907 } else if (j >= number)
1908 break;
1909 else
1910 prev_chunk = chunk;
1911 }
1912 pginfo->u.usr.next_chunk =
1913 list_prepare_entry(prev_chunk,
1914 (&(pginfo->u.usr.region->chunk_list)),
1915 list);
1916 return ret;
1917 }
1918
1919 /*
1920 * check given pages for contiguous layout
1921 * last page addr is returned in prev_pgaddr for further check
1922 */
ehca_check_kpages_per_ate(struct scatterlist * page_list,int start_idx,int end_idx,u64 * prev_pgaddr)1923 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1924 int start_idx, int end_idx,
1925 u64 *prev_pgaddr)
1926 {
1927 int t;
1928 for (t = start_idx; t <= end_idx; t++) {
1929 u64 pgaddr = page_to_pfn(sg_page(&page_list[t])) << PAGE_SHIFT;
1930 if (ehca_debug_level >= 3)
1931 ehca_gen_dbg("chunk_page=%llx value=%016llx", pgaddr,
1932 *(u64 *)__va(pgaddr));
1933 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1934 ehca_gen_err("uncontiguous page found pgaddr=%llx "
1935 "prev_pgaddr=%llx page_list_i=%x",
1936 pgaddr, *prev_pgaddr, t);
1937 return -EINVAL;
1938 }
1939 *prev_pgaddr = pgaddr;
1940 }
1941 return 0;
1942 }
1943
1944 /* PAGE_SIZE < pginfo->hwpage_size */
ehca_set_pagebuf_user2(struct ehca_mr_pginfo * pginfo,u32 number,u64 * kpage)1945 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1946 u32 number,
1947 u64 *kpage)
1948 {
1949 int ret = 0;
1950 struct ib_umem_chunk *prev_chunk;
1951 struct ib_umem_chunk *chunk;
1952 u64 pgaddr, prev_pgaddr;
1953 u32 i = 0;
1954 u32 j = 0;
1955 int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1956 int nr_kpages = kpages_per_hwpage;
1957
1958 /* loop over desired chunk entries */
1959 chunk = pginfo->u.usr.next_chunk;
1960 prev_chunk = pginfo->u.usr.next_chunk;
1961 list_for_each_entry_continue(
1962 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1963 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1964 if (nr_kpages == kpages_per_hwpage) {
1965 pgaddr = ( page_to_pfn(sg_page(&chunk->page_list[i]))
1966 << PAGE_SHIFT );
1967 *kpage = pgaddr;
1968 if ( !(*kpage) ) {
1969 ehca_gen_err("pgaddr=%llx i=%x",
1970 pgaddr, i);
1971 ret = -EFAULT;
1972 return ret;
1973 }
1974 /*
1975 * The first page in a hwpage must be aligned;
1976 * the first MR page is exempt from this rule.
1977 */
1978 if (pgaddr & (pginfo->hwpage_size - 1)) {
1979 if (pginfo->hwpage_cnt) {
1980 ehca_gen_err(
1981 "invalid alignment "
1982 "pgaddr=%llx i=%x "
1983 "mr_pgsize=%llx",
1984 pgaddr, i,
1985 pginfo->hwpage_size);
1986 ret = -EFAULT;
1987 return ret;
1988 }
1989 /* first MR page */
1990 pginfo->kpage_cnt =
1991 (pgaddr &
1992 (pginfo->hwpage_size - 1)) >>
1993 PAGE_SHIFT;
1994 nr_kpages -= pginfo->kpage_cnt;
1995 *kpage = pgaddr &
1996 ~(pginfo->hwpage_size - 1);
1997 }
1998 if (ehca_debug_level >= 3) {
1999 u64 val = *(u64 *)__va(pgaddr);
2000 ehca_gen_dbg("kpage=%llx chunk_page=%llx "
2001 "value=%016llx",
2002 *kpage, pgaddr, val);
2003 }
2004 prev_pgaddr = pgaddr;
2005 i++;
2006 pginfo->kpage_cnt++;
2007 pginfo->u.usr.next_nmap++;
2008 nr_kpages--;
2009 if (!nr_kpages)
2010 goto next_kpage;
2011 continue;
2012 }
2013 if (i + nr_kpages > chunk->nmap) {
2014 ret = ehca_check_kpages_per_ate(
2015 chunk->page_list, i,
2016 chunk->nmap - 1, &prev_pgaddr);
2017 if (ret) return ret;
2018 pginfo->kpage_cnt += chunk->nmap - i;
2019 pginfo->u.usr.next_nmap += chunk->nmap - i;
2020 nr_kpages -= chunk->nmap - i;
2021 break;
2022 }
2023
2024 ret = ehca_check_kpages_per_ate(chunk->page_list, i,
2025 i + nr_kpages - 1,
2026 &prev_pgaddr);
2027 if (ret) return ret;
2028 i += nr_kpages;
2029 pginfo->kpage_cnt += nr_kpages;
2030 pginfo->u.usr.next_nmap += nr_kpages;
2031 next_kpage:
2032 nr_kpages = kpages_per_hwpage;
2033 (pginfo->hwpage_cnt)++;
2034 kpage++;
2035 j++;
2036 if (j >= number) break;
2037 }
2038 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
2039 (j >= number)) {
2040 pginfo->u.usr.next_nmap = 0;
2041 prev_chunk = chunk;
2042 break;
2043 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
2044 pginfo->u.usr.next_nmap = 0;
2045 prev_chunk = chunk;
2046 } else if (j >= number)
2047 break;
2048 else
2049 prev_chunk = chunk;
2050 }
2051 pginfo->u.usr.next_chunk =
2052 list_prepare_entry(prev_chunk,
2053 (&(pginfo->u.usr.region->chunk_list)),
2054 list);
2055 return ret;
2056 }
2057
ehca_set_pagebuf_phys(struct ehca_mr_pginfo * pginfo,u32 number,u64 * kpage)2058 static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
2059 u32 number, u64 *kpage)
2060 {
2061 int ret = 0;
2062 struct ib_phys_buf *pbuf;
2063 u64 num_hw, offs_hw;
2064 u32 i = 0;
2065
2066 /* loop over desired phys_buf_array entries */
2067 while (i < number) {
2068 pbuf = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
2069 num_hw = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
2070 pbuf->size, pginfo->hwpage_size);
2071 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
2072 pginfo->hwpage_size;
2073 while (pginfo->next_hwpage < offs_hw + num_hw) {
2074 /* sanity check */
2075 if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
2076 (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
2077 ehca_gen_err("kpage_cnt >= num_kpages, "
2078 "kpage_cnt=%llx num_kpages=%llx "
2079 "hwpage_cnt=%llx "
2080 "num_hwpages=%llx i=%x",
2081 pginfo->kpage_cnt,
2082 pginfo->num_kpages,
2083 pginfo->hwpage_cnt,
2084 pginfo->num_hwpages, i);
2085 return -EFAULT;
2086 }
2087 *kpage = (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
2088 (pginfo->next_hwpage * pginfo->hwpage_size);
2089 if ( !(*kpage) && pbuf->addr ) {
2090 ehca_gen_err("pbuf->addr=%llx pbuf->size=%llx "
2091 "next_hwpage=%llx", pbuf->addr,
2092 pbuf->size, pginfo->next_hwpage);
2093 return -EFAULT;
2094 }
2095 (pginfo->hwpage_cnt)++;
2096 (pginfo->next_hwpage)++;
2097 if (PAGE_SIZE >= pginfo->hwpage_size) {
2098 if (pginfo->next_hwpage %
2099 (PAGE_SIZE / pginfo->hwpage_size) == 0)
2100 (pginfo->kpage_cnt)++;
2101 } else
2102 pginfo->kpage_cnt += pginfo->hwpage_size /
2103 PAGE_SIZE;
2104 kpage++;
2105 i++;
2106 if (i >= number) break;
2107 }
2108 if (pginfo->next_hwpage >= offs_hw + num_hw) {
2109 (pginfo->u.phy.next_buf)++;
2110 pginfo->next_hwpage = 0;
2111 }
2112 }
2113 return ret;
2114 }
2115
ehca_set_pagebuf_fmr(struct ehca_mr_pginfo * pginfo,u32 number,u64 * kpage)2116 static int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
2117 u32 number, u64 *kpage)
2118 {
2119 int ret = 0;
2120 u64 *fmrlist;
2121 u32 i;
2122
2123 /* loop over desired page_list entries */
2124 fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
2125 for (i = 0; i < number; i++) {
2126 *kpage = (*fmrlist & ~(pginfo->hwpage_size - 1)) +
2127 pginfo->next_hwpage * pginfo->hwpage_size;
2128 if ( !(*kpage) ) {
2129 ehca_gen_err("*fmrlist=%llx fmrlist=%p "
2130 "next_listelem=%llx next_hwpage=%llx",
2131 *fmrlist, fmrlist,
2132 pginfo->u.fmr.next_listelem,
2133 pginfo->next_hwpage);
2134 return -EFAULT;
2135 }
2136 (pginfo->hwpage_cnt)++;
2137 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2138 if (pginfo->next_hwpage %
2139 (pginfo->u.fmr.fmr_pgsize /
2140 pginfo->hwpage_size) == 0) {
2141 (pginfo->kpage_cnt)++;
2142 (pginfo->u.fmr.next_listelem)++;
2143 fmrlist++;
2144 pginfo->next_hwpage = 0;
2145 } else
2146 (pginfo->next_hwpage)++;
2147 } else {
2148 unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2149 pginfo->u.fmr.fmr_pgsize;
2150 unsigned int j;
2151 u64 prev = *kpage;
2152 /* check if adrs are contiguous */
2153 for (j = 1; j < cnt_per_hwpage; j++) {
2154 u64 p = fmrlist[j] & ~(pginfo->hwpage_size - 1);
2155 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2156 ehca_gen_err("uncontiguous fmr pages "
2157 "found prev=%llx p=%llx "
2158 "idx=%x", prev, p, i + j);
2159 return -EINVAL;
2160 }
2161 prev = p;
2162 }
2163 pginfo->kpage_cnt += cnt_per_hwpage;
2164 pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2165 fmrlist += cnt_per_hwpage;
2166 }
2167 kpage++;
2168 }
2169 return ret;
2170 }
2171
2172 /* setup page buffer from page info */
ehca_set_pagebuf(struct ehca_mr_pginfo * pginfo,u32 number,u64 * kpage)2173 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2174 u32 number,
2175 u64 *kpage)
2176 {
2177 int ret;
2178
2179 switch (pginfo->type) {
2180 case EHCA_MR_PGI_PHYS:
2181 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2182 break;
2183 case EHCA_MR_PGI_USER:
2184 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2185 ehca_set_pagebuf_user1(pginfo, number, kpage) :
2186 ehca_set_pagebuf_user2(pginfo, number, kpage);
2187 break;
2188 case EHCA_MR_PGI_FMR:
2189 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2190 break;
2191 default:
2192 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2193 ret = -EFAULT;
2194 break;
2195 }
2196 return ret;
2197 } /* end ehca_set_pagebuf() */
2198
2199 /*----------------------------------------------------------------------*/
2200
2201 /*
2202 * check MR if it is a max-MR, i.e. uses whole memory
2203 * in case it's a max-MR 1 is returned, else 0
2204 */
ehca_mr_is_maxmr(u64 size,u64 * iova_start)2205 int ehca_mr_is_maxmr(u64 size,
2206 u64 *iova_start)
2207 {
2208 /* a MR is treated as max-MR only if it fits following: */
2209 if ((size == ehca_mr_len) &&
2210 (iova_start == (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)))) {
2211 ehca_gen_dbg("this is a max-MR");
2212 return 1;
2213 } else
2214 return 0;
2215 } /* end ehca_mr_is_maxmr() */
2216
2217 /*----------------------------------------------------------------------*/
2218
2219 /* map access control for MR/MW. This routine is used for MR and MW. */
ehca_mrmw_map_acl(int ib_acl,u32 * hipz_acl)2220 void ehca_mrmw_map_acl(int ib_acl,
2221 u32 *hipz_acl)
2222 {
2223 *hipz_acl = 0;
2224 if (ib_acl & IB_ACCESS_REMOTE_READ)
2225 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2226 if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2227 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2228 if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2229 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2230 if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2231 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2232 if (ib_acl & IB_ACCESS_MW_BIND)
2233 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2234 } /* end ehca_mrmw_map_acl() */
2235
2236 /*----------------------------------------------------------------------*/
2237
2238 /* sets page size in hipz access control for MR/MW. */
ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize,u32 * hipz_acl)2239 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2240 {
2241 *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2242 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2243
2244 /*----------------------------------------------------------------------*/
2245
2246 /*
2247 * reverse map access control for MR/MW.
2248 * This routine is used for MR and MW.
2249 */
ehca_mrmw_reverse_map_acl(const u32 * hipz_acl,int * ib_acl)2250 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2251 int *ib_acl) /*OUT*/
2252 {
2253 *ib_acl = 0;
2254 if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2255 *ib_acl |= IB_ACCESS_REMOTE_READ;
2256 if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2257 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2258 if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2259 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2260 if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2261 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2262 if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2263 *ib_acl |= IB_ACCESS_MW_BIND;
2264 } /* end ehca_mrmw_reverse_map_acl() */
2265
2266
2267 /*----------------------------------------------------------------------*/
2268
2269 /*
2270 * MR destructor and constructor
2271 * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2272 * except struct ib_mr and spinlock
2273 */
ehca_mr_deletenew(struct ehca_mr * mr)2274 void ehca_mr_deletenew(struct ehca_mr *mr)
2275 {
2276 mr->flags = 0;
2277 mr->num_kpages = 0;
2278 mr->num_hwpages = 0;
2279 mr->acl = 0;
2280 mr->start = NULL;
2281 mr->fmr_page_size = 0;
2282 mr->fmr_max_pages = 0;
2283 mr->fmr_max_maps = 0;
2284 mr->fmr_map_cnt = 0;
2285 memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2286 memset(&mr->galpas, 0, sizeof(mr->galpas));
2287 } /* end ehca_mr_deletenew() */
2288
ehca_init_mrmw_cache(void)2289 int ehca_init_mrmw_cache(void)
2290 {
2291 mr_cache = kmem_cache_create("ehca_cache_mr",
2292 sizeof(struct ehca_mr), 0,
2293 SLAB_HWCACHE_ALIGN,
2294 NULL);
2295 if (!mr_cache)
2296 return -ENOMEM;
2297 mw_cache = kmem_cache_create("ehca_cache_mw",
2298 sizeof(struct ehca_mw), 0,
2299 SLAB_HWCACHE_ALIGN,
2300 NULL);
2301 if (!mw_cache) {
2302 kmem_cache_destroy(mr_cache);
2303 mr_cache = NULL;
2304 return -ENOMEM;
2305 }
2306 return 0;
2307 }
2308
ehca_cleanup_mrmw_cache(void)2309 void ehca_cleanup_mrmw_cache(void)
2310 {
2311 if (mr_cache)
2312 kmem_cache_destroy(mr_cache);
2313 if (mw_cache)
2314 kmem_cache_destroy(mw_cache);
2315 }
2316
ehca_init_top_bmap(struct ehca_top_bmap * ehca_top_bmap,int dir)2317 static inline int ehca_init_top_bmap(struct ehca_top_bmap *ehca_top_bmap,
2318 int dir)
2319 {
2320 if (!ehca_bmap_valid(ehca_top_bmap->dir[dir])) {
2321 ehca_top_bmap->dir[dir] =
2322 kmalloc(sizeof(struct ehca_dir_bmap), GFP_KERNEL);
2323 if (!ehca_top_bmap->dir[dir])
2324 return -ENOMEM;
2325 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2326 memset(ehca_top_bmap->dir[dir], 0xFF, EHCA_ENT_MAP_SIZE);
2327 }
2328 return 0;
2329 }
2330
ehca_init_bmap(struct ehca_bmap * ehca_bmap,int top,int dir)2331 static inline int ehca_init_bmap(struct ehca_bmap *ehca_bmap, int top, int dir)
2332 {
2333 if (!ehca_bmap_valid(ehca_bmap->top[top])) {
2334 ehca_bmap->top[top] =
2335 kmalloc(sizeof(struct ehca_top_bmap), GFP_KERNEL);
2336 if (!ehca_bmap->top[top])
2337 return -ENOMEM;
2338 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2339 memset(ehca_bmap->top[top], 0xFF, EHCA_DIR_MAP_SIZE);
2340 }
2341 return ehca_init_top_bmap(ehca_bmap->top[top], dir);
2342 }
2343
ehca_calc_index(unsigned long i,unsigned long s)2344 static inline int ehca_calc_index(unsigned long i, unsigned long s)
2345 {
2346 return (i >> s) & EHCA_INDEX_MASK;
2347 }
2348
ehca_destroy_busmap(void)2349 void ehca_destroy_busmap(void)
2350 {
2351 int top, dir;
2352
2353 if (!ehca_bmap)
2354 return;
2355
2356 for (top = 0; top < EHCA_MAP_ENTRIES; top++) {
2357 if (!ehca_bmap_valid(ehca_bmap->top[top]))
2358 continue;
2359 for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) {
2360 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
2361 continue;
2362
2363 kfree(ehca_bmap->top[top]->dir[dir]);
2364 }
2365
2366 kfree(ehca_bmap->top[top]);
2367 }
2368
2369 kfree(ehca_bmap);
2370 ehca_bmap = NULL;
2371 }
2372
ehca_update_busmap(unsigned long pfn,unsigned long nr_pages)2373 static int ehca_update_busmap(unsigned long pfn, unsigned long nr_pages)
2374 {
2375 unsigned long i, start_section, end_section;
2376 int top, dir, idx;
2377
2378 if (!nr_pages)
2379 return 0;
2380
2381 if (!ehca_bmap) {
2382 ehca_bmap = kmalloc(sizeof(struct ehca_bmap), GFP_KERNEL);
2383 if (!ehca_bmap)
2384 return -ENOMEM;
2385 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2386 memset(ehca_bmap, 0xFF, EHCA_TOP_MAP_SIZE);
2387 }
2388
2389 start_section = (pfn * PAGE_SIZE) / EHCA_SECTSIZE;
2390 end_section = ((pfn + nr_pages) * PAGE_SIZE) / EHCA_SECTSIZE;
2391 for (i = start_section; i < end_section; i++) {
2392 int ret;
2393 top = ehca_calc_index(i, EHCA_TOP_INDEX_SHIFT);
2394 dir = ehca_calc_index(i, EHCA_DIR_INDEX_SHIFT);
2395 idx = i & EHCA_INDEX_MASK;
2396
2397 ret = ehca_init_bmap(ehca_bmap, top, dir);
2398 if (ret) {
2399 ehca_destroy_busmap();
2400 return ret;
2401 }
2402 ehca_bmap->top[top]->dir[dir]->ent[idx] = ehca_mr_len;
2403 ehca_mr_len += EHCA_SECTSIZE;
2404 }
2405 return 0;
2406 }
2407
ehca_is_hugepage(unsigned long pfn)2408 static int ehca_is_hugepage(unsigned long pfn)
2409 {
2410 int page_order;
2411
2412 if (pfn & EHCA_HUGEPAGE_PFN_MASK)
2413 return 0;
2414
2415 page_order = compound_order(pfn_to_page(pfn));
2416 if (page_order + PAGE_SHIFT != EHCA_HUGEPAGESHIFT)
2417 return 0;
2418
2419 return 1;
2420 }
2421
ehca_create_busmap_callback(unsigned long initial_pfn,unsigned long total_nr_pages,void * arg)2422 static int ehca_create_busmap_callback(unsigned long initial_pfn,
2423 unsigned long total_nr_pages, void *arg)
2424 {
2425 int ret;
2426 unsigned long pfn, start_pfn, end_pfn, nr_pages;
2427
2428 if ((total_nr_pages * PAGE_SIZE) < EHCA_HUGEPAGE_SIZE)
2429 return ehca_update_busmap(initial_pfn, total_nr_pages);
2430
2431 /* Given chunk is >= 16GB -> check for hugepages */
2432 start_pfn = initial_pfn;
2433 end_pfn = initial_pfn + total_nr_pages;
2434 pfn = start_pfn;
2435
2436 while (pfn < end_pfn) {
2437 if (ehca_is_hugepage(pfn)) {
2438 /* Add mem found in front of the hugepage */
2439 nr_pages = pfn - start_pfn;
2440 ret = ehca_update_busmap(start_pfn, nr_pages);
2441 if (ret)
2442 return ret;
2443 /* Skip the hugepage */
2444 pfn += (EHCA_HUGEPAGE_SIZE / PAGE_SIZE);
2445 start_pfn = pfn;
2446 } else
2447 pfn += (EHCA_SECTSIZE / PAGE_SIZE);
2448 }
2449
2450 /* Add mem found behind the hugepage(s) */
2451 nr_pages = pfn - start_pfn;
2452 return ehca_update_busmap(start_pfn, nr_pages);
2453 }
2454
ehca_create_busmap(void)2455 int ehca_create_busmap(void)
2456 {
2457 int ret;
2458
2459 ehca_mr_len = 0;
2460 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
2461 ehca_create_busmap_callback);
2462 return ret;
2463 }
2464
ehca_reg_bmap_mr_rpages(struct ehca_shca * shca,struct ehca_mr * e_mr,struct ehca_mr_pginfo * pginfo)2465 static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca,
2466 struct ehca_mr *e_mr,
2467 struct ehca_mr_pginfo *pginfo)
2468 {
2469 int top;
2470 u64 hret, *kpage;
2471
2472 kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2473 if (!kpage) {
2474 ehca_err(&shca->ib_device, "kpage alloc failed");
2475 return -ENOMEM;
2476 }
2477 for (top = 0; top < EHCA_MAP_ENTRIES; top++) {
2478 if (!ehca_bmap_valid(ehca_bmap->top[top]))
2479 continue;
2480 hret = ehca_reg_mr_dir_sections(top, kpage, shca, e_mr, pginfo);
2481 if ((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
2482 break;
2483 }
2484
2485 ehca_free_fw_ctrlblock(kpage);
2486
2487 if (hret == H_SUCCESS)
2488 return 0; /* Everything is fine */
2489 else {
2490 ehca_err(&shca->ib_device, "ehca_reg_bmap_mr_rpages failed, "
2491 "h_ret=%lli e_mr=%p top=%x lkey=%x "
2492 "hca_hndl=%llx mr_hndl=%llx", hret, e_mr, top,
2493 e_mr->ib.ib_mr.lkey,
2494 shca->ipz_hca_handle.handle,
2495 e_mr->ipz_mr_handle.handle);
2496 return ehca2ib_return_code(hret);
2497 }
2498 }
2499
ehca_map_vaddr(void * caddr)2500 static u64 ehca_map_vaddr(void *caddr)
2501 {
2502 int top, dir, idx;
2503 unsigned long abs_addr, offset;
2504 u64 entry;
2505
2506 if (!ehca_bmap)
2507 return EHCA_INVAL_ADDR;
2508
2509 abs_addr = __pa(caddr);
2510 top = ehca_calc_index(abs_addr, EHCA_TOP_INDEX_SHIFT + EHCA_SECTSHIFT);
2511 if (!ehca_bmap_valid(ehca_bmap->top[top]))
2512 return EHCA_INVAL_ADDR;
2513
2514 dir = ehca_calc_index(abs_addr, EHCA_DIR_INDEX_SHIFT + EHCA_SECTSHIFT);
2515 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
2516 return EHCA_INVAL_ADDR;
2517
2518 idx = ehca_calc_index(abs_addr, EHCA_SECTSHIFT);
2519
2520 entry = ehca_bmap->top[top]->dir[dir]->ent[idx];
2521 if (ehca_bmap_valid(entry)) {
2522 offset = (unsigned long)caddr & (EHCA_SECTSIZE - 1);
2523 return entry | offset;
2524 } else
2525 return EHCA_INVAL_ADDR;
2526 }
2527
ehca_dma_mapping_error(struct ib_device * dev,u64 dma_addr)2528 static int ehca_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2529 {
2530 return dma_addr == EHCA_INVAL_ADDR;
2531 }
2532
ehca_dma_map_single(struct ib_device * dev,void * cpu_addr,size_t size,enum dma_data_direction direction)2533 static u64 ehca_dma_map_single(struct ib_device *dev, void *cpu_addr,
2534 size_t size, enum dma_data_direction direction)
2535 {
2536 if (cpu_addr)
2537 return ehca_map_vaddr(cpu_addr);
2538 else
2539 return EHCA_INVAL_ADDR;
2540 }
2541
ehca_dma_unmap_single(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)2542 static void ehca_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size,
2543 enum dma_data_direction direction)
2544 {
2545 /* This is only a stub; nothing to be done here */
2546 }
2547
ehca_dma_map_page(struct ib_device * dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction)2548 static u64 ehca_dma_map_page(struct ib_device *dev, struct page *page,
2549 unsigned long offset, size_t size,
2550 enum dma_data_direction direction)
2551 {
2552 u64 addr;
2553
2554 if (offset + size > PAGE_SIZE)
2555 return EHCA_INVAL_ADDR;
2556
2557 addr = ehca_map_vaddr(page_address(page));
2558 if (!ehca_dma_mapping_error(dev, addr))
2559 addr += offset;
2560
2561 return addr;
2562 }
2563
ehca_dma_unmap_page(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)2564 static void ehca_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size,
2565 enum dma_data_direction direction)
2566 {
2567 /* This is only a stub; nothing to be done here */
2568 }
2569
ehca_dma_map_sg(struct ib_device * dev,struct scatterlist * sgl,int nents,enum dma_data_direction direction)2570 static int ehca_dma_map_sg(struct ib_device *dev, struct scatterlist *sgl,
2571 int nents, enum dma_data_direction direction)
2572 {
2573 struct scatterlist *sg;
2574 int i;
2575
2576 for_each_sg(sgl, sg, nents, i) {
2577 u64 addr;
2578 addr = ehca_map_vaddr(sg_virt(sg));
2579 if (ehca_dma_mapping_error(dev, addr))
2580 return 0;
2581
2582 sg->dma_address = addr;
2583 sg->dma_length = sg->length;
2584 }
2585 return nents;
2586 }
2587
ehca_dma_unmap_sg(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction)2588 static void ehca_dma_unmap_sg(struct ib_device *dev, struct scatterlist *sg,
2589 int nents, enum dma_data_direction direction)
2590 {
2591 /* This is only a stub; nothing to be done here */
2592 }
2593
ehca_dma_address(struct ib_device * dev,struct scatterlist * sg)2594 static u64 ehca_dma_address(struct ib_device *dev, struct scatterlist *sg)
2595 {
2596 return sg->dma_address;
2597 }
2598
ehca_dma_len(struct ib_device * dev,struct scatterlist * sg)2599 static unsigned int ehca_dma_len(struct ib_device *dev, struct scatterlist *sg)
2600 {
2601 return sg->length;
2602 }
2603
ehca_dma_sync_single_for_cpu(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)2604 static void ehca_dma_sync_single_for_cpu(struct ib_device *dev, u64 addr,
2605 size_t size,
2606 enum dma_data_direction dir)
2607 {
2608 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2609 }
2610
ehca_dma_sync_single_for_device(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)2611 static void ehca_dma_sync_single_for_device(struct ib_device *dev, u64 addr,
2612 size_t size,
2613 enum dma_data_direction dir)
2614 {
2615 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2616 }
2617
ehca_dma_alloc_coherent(struct ib_device * dev,size_t size,u64 * dma_handle,gfp_t flag)2618 static void *ehca_dma_alloc_coherent(struct ib_device *dev, size_t size,
2619 u64 *dma_handle, gfp_t flag)
2620 {
2621 struct page *p;
2622 void *addr = NULL;
2623 u64 dma_addr;
2624
2625 p = alloc_pages(flag, get_order(size));
2626 if (p) {
2627 addr = page_address(p);
2628 dma_addr = ehca_map_vaddr(addr);
2629 if (ehca_dma_mapping_error(dev, dma_addr)) {
2630 free_pages((unsigned long)addr, get_order(size));
2631 return NULL;
2632 }
2633 if (dma_handle)
2634 *dma_handle = dma_addr;
2635 return addr;
2636 }
2637 return NULL;
2638 }
2639
ehca_dma_free_coherent(struct ib_device * dev,size_t size,void * cpu_addr,u64 dma_handle)2640 static void ehca_dma_free_coherent(struct ib_device *dev, size_t size,
2641 void *cpu_addr, u64 dma_handle)
2642 {
2643 if (cpu_addr && size)
2644 free_pages((unsigned long)cpu_addr, get_order(size));
2645 }
2646
2647
2648 struct ib_dma_mapping_ops ehca_dma_mapping_ops = {
2649 .mapping_error = ehca_dma_mapping_error,
2650 .map_single = ehca_dma_map_single,
2651 .unmap_single = ehca_dma_unmap_single,
2652 .map_page = ehca_dma_map_page,
2653 .unmap_page = ehca_dma_unmap_page,
2654 .map_sg = ehca_dma_map_sg,
2655 .unmap_sg = ehca_dma_unmap_sg,
2656 .dma_address = ehca_dma_address,
2657 .dma_len = ehca_dma_len,
2658 .sync_single_for_cpu = ehca_dma_sync_single_for_cpu,
2659 .sync_single_for_device = ehca_dma_sync_single_for_device,
2660 .alloc_coherent = ehca_dma_alloc_coherent,
2661 .free_coherent = ehca_dma_free_coherent,
2662 };
2663