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34#include <linux/slab.h>
35#include <linux/errno.h>
36
37#include "mthca_dev.h"
38#include "mthca_cmd.h"
39#include "mthca_memfree.h"
40
41struct mthca_mtt {
42 struct mthca_buddy *buddy;
43 int order;
44 u32 first_seg;
45};
46
47
48
49
50struct mthca_mpt_entry {
51 __be32 flags;
52 __be32 page_size;
53 __be32 key;
54 __be32 pd;
55 __be64 start;
56 __be64 length;
57 __be32 lkey;
58 __be32 window_count;
59 __be32 window_count_limit;
60 __be64 mtt_seg;
61 __be32 mtt_sz;
62 u32 reserved[2];
63} __attribute__((packed));
64
65#define MTHCA_MPT_FLAG_SW_OWNS (0xfUL << 28)
66#define MTHCA_MPT_FLAG_MIO (1 << 17)
67#define MTHCA_MPT_FLAG_BIND_ENABLE (1 << 15)
68#define MTHCA_MPT_FLAG_PHYSICAL (1 << 9)
69#define MTHCA_MPT_FLAG_REGION (1 << 8)
70
71#define MTHCA_MTT_FLAG_PRESENT 1
72
73#define MTHCA_MPT_STATUS_SW 0xF0
74#define MTHCA_MPT_STATUS_HW 0x00
75
76#define SINAI_FMR_KEY_INC 0x1000000
77
78
79
80
81
82
83
84static u32 mthca_buddy_alloc(struct mthca_buddy *buddy, int order)
85{
86 int o;
87 int m;
88 u32 seg;
89
90 spin_lock(&buddy->lock);
91
92 for (o = order; o <= buddy->max_order; ++o)
93 if (buddy->num_free[o]) {
94 m = 1 << (buddy->max_order - o);
95 seg = find_first_bit(buddy->bits[o], m);
96 if (seg < m)
97 goto found;
98 }
99
100 spin_unlock(&buddy->lock);
101 return -1;
102
103 found:
104 clear_bit(seg, buddy->bits[o]);
105 --buddy->num_free[o];
106
107 while (o > order) {
108 --o;
109 seg <<= 1;
110 set_bit(seg ^ 1, buddy->bits[o]);
111 ++buddy->num_free[o];
112 }
113
114 spin_unlock(&buddy->lock);
115
116 seg <<= order;
117
118 return seg;
119}
120
121static void mthca_buddy_free(struct mthca_buddy *buddy, u32 seg, int order)
122{
123 seg >>= order;
124
125 spin_lock(&buddy->lock);
126
127 while (test_bit(seg ^ 1, buddy->bits[order])) {
128 clear_bit(seg ^ 1, buddy->bits[order]);
129 --buddy->num_free[order];
130 seg >>= 1;
131 ++order;
132 }
133
134 set_bit(seg, buddy->bits[order]);
135 ++buddy->num_free[order];
136
137 spin_unlock(&buddy->lock);
138}
139
140static int mthca_buddy_init(struct mthca_buddy *buddy, int max_order)
141{
142 int i, s;
143
144 buddy->max_order = max_order;
145 spin_lock_init(&buddy->lock);
146
147 buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *),
148 GFP_KERNEL);
149 buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free,
150 GFP_KERNEL);
151 if (!buddy->bits || !buddy->num_free)
152 goto err_out;
153
154 for (i = 0; i <= buddy->max_order; ++i) {
155 s = BITS_TO_LONGS(1 << (buddy->max_order - i));
156 buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL);
157 if (!buddy->bits[i])
158 goto err_out_free;
159 bitmap_zero(buddy->bits[i],
160 1 << (buddy->max_order - i));
161 }
162
163 set_bit(0, buddy->bits[buddy->max_order]);
164 buddy->num_free[buddy->max_order] = 1;
165
166 return 0;
167
168err_out_free:
169 for (i = 0; i <= buddy->max_order; ++i)
170 kfree(buddy->bits[i]);
171
172err_out:
173 kfree(buddy->bits);
174 kfree(buddy->num_free);
175
176 return -ENOMEM;
177}
178
179static void mthca_buddy_cleanup(struct mthca_buddy *buddy)
180{
181 int i;
182
183 for (i = 0; i <= buddy->max_order; ++i)
184 kfree(buddy->bits[i]);
185
186 kfree(buddy->bits);
187 kfree(buddy->num_free);
188}
189
190static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order,
191 struct mthca_buddy *buddy)
192{
193 u32 seg = mthca_buddy_alloc(buddy, order);
194
195 if (seg == -1)
196 return -1;
197
198 if (mthca_is_memfree(dev))
199 if (mthca_table_get_range(dev, dev->mr_table.mtt_table, seg,
200 seg + (1 << order) - 1)) {
201 mthca_buddy_free(buddy, seg, order);
202 seg = -1;
203 }
204
205 return seg;
206}
207
208static struct mthca_mtt *__mthca_alloc_mtt(struct mthca_dev *dev, int size,
209 struct mthca_buddy *buddy)
210{
211 struct mthca_mtt *mtt;
212 int i;
213
214 if (size <= 0)
215 return ERR_PTR(-EINVAL);
216
217 mtt = kmalloc(sizeof *mtt, GFP_KERNEL);
218 if (!mtt)
219 return ERR_PTR(-ENOMEM);
220
221 mtt->buddy = buddy;
222 mtt->order = 0;
223 for (i = dev->limits.mtt_seg_size / 8; i < size; i <<= 1)
224 ++mtt->order;
225
226 mtt->first_seg = mthca_alloc_mtt_range(dev, mtt->order, buddy);
227 if (mtt->first_seg == -1) {
228 kfree(mtt);
229 return ERR_PTR(-ENOMEM);
230 }
231
232 return mtt;
233}
234
235struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size)
236{
237 return __mthca_alloc_mtt(dev, size, &dev->mr_table.mtt_buddy);
238}
239
240void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt)
241{
242 if (!mtt)
243 return;
244
245 mthca_buddy_free(mtt->buddy, mtt->first_seg, mtt->order);
246
247 mthca_table_put_range(dev, dev->mr_table.mtt_table,
248 mtt->first_seg,
249 mtt->first_seg + (1 << mtt->order) - 1);
250
251 kfree(mtt);
252}
253
254static int __mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
255 int start_index, u64 *buffer_list, int list_len)
256{
257 struct mthca_mailbox *mailbox;
258 __be64 *mtt_entry;
259 int err = 0;
260 int i;
261
262 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
263 if (IS_ERR(mailbox))
264 return PTR_ERR(mailbox);
265 mtt_entry = mailbox->buf;
266
267 while (list_len > 0) {
268 mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
269 mtt->first_seg * dev->limits.mtt_seg_size +
270 start_index * 8);
271 mtt_entry[1] = 0;
272 for (i = 0; i < list_len && i < MTHCA_MAILBOX_SIZE / 8 - 2; ++i)
273 mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
274 MTHCA_MTT_FLAG_PRESENT);
275
276
277
278
279
280 if (i & 1)
281 mtt_entry[i + 2] = 0;
282
283 err = mthca_WRITE_MTT(dev, mailbox, (i + 1) & ~1);
284 if (err) {
285 mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
286 goto out;
287 }
288
289 list_len -= i;
290 start_index += i;
291 buffer_list += i;
292 }
293
294out:
295 mthca_free_mailbox(dev, mailbox);
296 return err;
297}
298
299int mthca_write_mtt_size(struct mthca_dev *dev)
300{
301 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
302 !(dev->mthca_flags & MTHCA_FLAG_FMR))
303
304
305
306
307
308
309 return PAGE_SIZE / sizeof (u64) - 2;
310
311
312 return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff;
313}
314
315static void mthca_tavor_write_mtt_seg(struct mthca_dev *dev,
316 struct mthca_mtt *mtt, int start_index,
317 u64 *buffer_list, int list_len)
318{
319 u64 __iomem *mtts;
320 int i;
321
322 mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * dev->limits.mtt_seg_size +
323 start_index * sizeof (u64);
324 for (i = 0; i < list_len; ++i)
325 mthca_write64_raw(cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT),
326 mtts + i);
327}
328
329static void mthca_arbel_write_mtt_seg(struct mthca_dev *dev,
330 struct mthca_mtt *mtt, int start_index,
331 u64 *buffer_list, int list_len)
332{
333 __be64 *mtts;
334 dma_addr_t dma_handle;
335 int i;
336 int s = start_index * sizeof (u64);
337
338
339 BUG_ON(s / PAGE_SIZE != (s + list_len * sizeof(u64) - 1) / PAGE_SIZE);
340
341 BUG_ON(s % dev->limits.mtt_seg_size);
342
343 mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg +
344 s / dev->limits.mtt_seg_size, &dma_handle);
345
346 BUG_ON(!mtts);
347
348 dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
349 list_len * sizeof (u64), DMA_TO_DEVICE);
350
351 for (i = 0; i < list_len; ++i)
352 mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT);
353
354 dma_sync_single_for_device(&dev->pdev->dev, dma_handle,
355 list_len * sizeof (u64), DMA_TO_DEVICE);
356}
357
358int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
359 int start_index, u64 *buffer_list, int list_len)
360{
361 int size = mthca_write_mtt_size(dev);
362 int chunk;
363
364 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
365 !(dev->mthca_flags & MTHCA_FLAG_FMR))
366 return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len);
367
368 while (list_len > 0) {
369 chunk = min(size, list_len);
370 if (mthca_is_memfree(dev))
371 mthca_arbel_write_mtt_seg(dev, mtt, start_index,
372 buffer_list, chunk);
373 else
374 mthca_tavor_write_mtt_seg(dev, mtt, start_index,
375 buffer_list, chunk);
376
377 list_len -= chunk;
378 start_index += chunk;
379 buffer_list += chunk;
380 }
381
382 return 0;
383}
384
385static inline u32 tavor_hw_index_to_key(u32 ind)
386{
387 return ind;
388}
389
390static inline u32 tavor_key_to_hw_index(u32 key)
391{
392 return key;
393}
394
395static inline u32 arbel_hw_index_to_key(u32 ind)
396{
397 return (ind >> 24) | (ind << 8);
398}
399
400static inline u32 arbel_key_to_hw_index(u32 key)
401{
402 return (key << 24) | (key >> 8);
403}
404
405static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
406{
407 if (mthca_is_memfree(dev))
408 return arbel_hw_index_to_key(ind);
409 else
410 return tavor_hw_index_to_key(ind);
411}
412
413static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
414{
415 if (mthca_is_memfree(dev))
416 return arbel_key_to_hw_index(key);
417 else
418 return tavor_key_to_hw_index(key);
419}
420
421static inline u32 adjust_key(struct mthca_dev *dev, u32 key)
422{
423 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
424 return ((key << 20) & 0x800000) | (key & 0x7fffff);
425 else
426 return key;
427}
428
429int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
430 u64 iova, u64 total_size, u32 access, struct mthca_mr *mr)
431{
432 struct mthca_mailbox *mailbox;
433 struct mthca_mpt_entry *mpt_entry;
434 u32 key;
435 int i;
436 int err;
437
438 WARN_ON(buffer_size_shift >= 32);
439
440 key = mthca_alloc(&dev->mr_table.mpt_alloc);
441 if (key == -1)
442 return -ENOMEM;
443 key = adjust_key(dev, key);
444 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
445
446 if (mthca_is_memfree(dev)) {
447 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
448 if (err)
449 goto err_out_mpt_free;
450 }
451
452 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
453 if (IS_ERR(mailbox)) {
454 err = PTR_ERR(mailbox);
455 goto err_out_table;
456 }
457 mpt_entry = mailbox->buf;
458
459 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
460 MTHCA_MPT_FLAG_MIO |
461 MTHCA_MPT_FLAG_REGION |
462 access);
463 if (!mr->mtt)
464 mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL);
465
466 mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
467 mpt_entry->key = cpu_to_be32(key);
468 mpt_entry->pd = cpu_to_be32(pd);
469 mpt_entry->start = cpu_to_be64(iova);
470 mpt_entry->length = cpu_to_be64(total_size);
471
472 memset(&mpt_entry->lkey, 0,
473 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
474
475 if (mr->mtt)
476 mpt_entry->mtt_seg =
477 cpu_to_be64(dev->mr_table.mtt_base +
478 mr->mtt->first_seg * dev->limits.mtt_seg_size);
479
480 if (0) {
481 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
482 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
483 if (i % 4 == 0)
484 printk("[%02x] ", i * 4);
485 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
486 if ((i + 1) % 4 == 0)
487 printk("\n");
488 }
489 }
490
491 err = mthca_SW2HW_MPT(dev, mailbox,
492 key & (dev->limits.num_mpts - 1));
493 if (err) {
494 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
495 goto err_out_mailbox;
496 }
497
498 mthca_free_mailbox(dev, mailbox);
499 return err;
500
501err_out_mailbox:
502 mthca_free_mailbox(dev, mailbox);
503
504err_out_table:
505 mthca_table_put(dev, dev->mr_table.mpt_table, key);
506
507err_out_mpt_free:
508 mthca_free(&dev->mr_table.mpt_alloc, key);
509 return err;
510}
511
512int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
513 u32 access, struct mthca_mr *mr)
514{
515 mr->mtt = NULL;
516 return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr);
517}
518
519int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
520 u64 *buffer_list, int buffer_size_shift,
521 int list_len, u64 iova, u64 total_size,
522 u32 access, struct mthca_mr *mr)
523{
524 int err;
525
526 mr->mtt = mthca_alloc_mtt(dev, list_len);
527 if (IS_ERR(mr->mtt))
528 return PTR_ERR(mr->mtt);
529
530 err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
531 if (err) {
532 mthca_free_mtt(dev, mr->mtt);
533 return err;
534 }
535
536 err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
537 total_size, access, mr);
538 if (err)
539 mthca_free_mtt(dev, mr->mtt);
540
541 return err;
542}
543
544
545static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
546{
547 mthca_table_put(dev, dev->mr_table.mpt_table,
548 key_to_hw_index(dev, lkey));
549
550 mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey));
551}
552
553void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
554{
555 int err;
556
557 err = mthca_HW2SW_MPT(dev, NULL,
558 key_to_hw_index(dev, mr->ibmr.lkey) &
559 (dev->limits.num_mpts - 1));
560 if (err)
561 mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
562
563 mthca_free_region(dev, mr->ibmr.lkey);
564 mthca_free_mtt(dev, mr->mtt);
565}
566
567int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
568 u32 access, struct mthca_fmr *mr)
569{
570 struct mthca_mpt_entry *mpt_entry;
571 struct mthca_mailbox *mailbox;
572 u64 mtt_seg;
573 u32 key, idx;
574 int list_len = mr->attr.max_pages;
575 int err = -ENOMEM;
576 int i;
577
578 if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
579 return -EINVAL;
580
581
582 if (mthca_is_memfree(dev) &&
583 mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
584 return -EINVAL;
585
586 mr->maps = 0;
587
588 key = mthca_alloc(&dev->mr_table.mpt_alloc);
589 if (key == -1)
590 return -ENOMEM;
591 key = adjust_key(dev, key);
592
593 idx = key & (dev->limits.num_mpts - 1);
594 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
595
596 if (mthca_is_memfree(dev)) {
597 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
598 if (err)
599 goto err_out_mpt_free;
600
601 mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
602 BUG_ON(!mr->mem.arbel.mpt);
603 } else
604 mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
605 sizeof *(mr->mem.tavor.mpt) * idx;
606
607 mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
608 if (IS_ERR(mr->mtt)) {
609 err = PTR_ERR(mr->mtt);
610 goto err_out_table;
611 }
612
613 mtt_seg = mr->mtt->first_seg * dev->limits.mtt_seg_size;
614
615 if (mthca_is_memfree(dev)) {
616 mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
617 mr->mtt->first_seg,
618 &mr->mem.arbel.dma_handle);
619 BUG_ON(!mr->mem.arbel.mtts);
620 } else
621 mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
622
623 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
624 if (IS_ERR(mailbox)) {
625 err = PTR_ERR(mailbox);
626 goto err_out_free_mtt;
627 }
628
629 mpt_entry = mailbox->buf;
630
631 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
632 MTHCA_MPT_FLAG_MIO |
633 MTHCA_MPT_FLAG_REGION |
634 access);
635
636 mpt_entry->page_size = cpu_to_be32(mr->attr.page_shift - 12);
637 mpt_entry->key = cpu_to_be32(key);
638 mpt_entry->pd = cpu_to_be32(pd);
639 memset(&mpt_entry->start, 0,
640 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
641 mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
642
643 if (0) {
644 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
645 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
646 if (i % 4 == 0)
647 printk("[%02x] ", i * 4);
648 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
649 if ((i + 1) % 4 == 0)
650 printk("\n");
651 }
652 }
653
654 err = mthca_SW2HW_MPT(dev, mailbox,
655 key & (dev->limits.num_mpts - 1));
656 if (err) {
657 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
658 goto err_out_mailbox_free;
659 }
660
661 mthca_free_mailbox(dev, mailbox);
662 return 0;
663
664err_out_mailbox_free:
665 mthca_free_mailbox(dev, mailbox);
666
667err_out_free_mtt:
668 mthca_free_mtt(dev, mr->mtt);
669
670err_out_table:
671 mthca_table_put(dev, dev->mr_table.mpt_table, key);
672
673err_out_mpt_free:
674 mthca_free(&dev->mr_table.mpt_alloc, key);
675 return err;
676}
677
678int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
679{
680 if (fmr->maps)
681 return -EBUSY;
682
683 mthca_free_region(dev, fmr->ibmr.lkey);
684 mthca_free_mtt(dev, fmr->mtt);
685
686 return 0;
687}
688
689static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
690 int list_len, u64 iova)
691{
692 int i, page_mask;
693
694 if (list_len > fmr->attr.max_pages)
695 return -EINVAL;
696
697 page_mask = (1 << fmr->attr.page_shift) - 1;
698
699
700 if (iova & page_mask)
701 return -EINVAL;
702
703
704 if (0)
705 for (i = 0; i < list_len; ++i) {
706 if (page_list[i] & ~page_mask)
707 return -EINVAL;
708 }
709
710 if (fmr->maps >= fmr->attr.max_maps)
711 return -EINVAL;
712
713 return 0;
714}
715
716
717int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
718 int list_len, u64 iova)
719{
720 struct mthca_fmr *fmr = to_mfmr(ibfmr);
721 struct mthca_dev *dev = to_mdev(ibfmr->device);
722 struct mthca_mpt_entry mpt_entry;
723 u32 key;
724 int i, err;
725
726 err = mthca_check_fmr(fmr, page_list, list_len, iova);
727 if (err)
728 return err;
729
730 ++fmr->maps;
731
732 key = tavor_key_to_hw_index(fmr->ibmr.lkey);
733 key += dev->limits.num_mpts;
734 fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
735
736 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
737
738 for (i = 0; i < list_len; ++i) {
739 __be64 mtt_entry = cpu_to_be64(page_list[i] |
740 MTHCA_MTT_FLAG_PRESENT);
741 mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
742 }
743
744 mpt_entry.lkey = cpu_to_be32(key);
745 mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
746 mpt_entry.start = cpu_to_be64(iova);
747
748 __raw_writel((__force u32) mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
749 memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
750 offsetof(struct mthca_mpt_entry, window_count) -
751 offsetof(struct mthca_mpt_entry, start));
752
753 writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
754
755 return 0;
756}
757
758int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
759 int list_len, u64 iova)
760{
761 struct mthca_fmr *fmr = to_mfmr(ibfmr);
762 struct mthca_dev *dev = to_mdev(ibfmr->device);
763 u32 key;
764 int i, err;
765
766 err = mthca_check_fmr(fmr, page_list, list_len, iova);
767 if (err)
768 return err;
769
770 ++fmr->maps;
771
772 key = arbel_key_to_hw_index(fmr->ibmr.lkey);
773 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
774 key += SINAI_FMR_KEY_INC;
775 else
776 key += dev->limits.num_mpts;
777 fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
778
779 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
780
781 wmb();
782
783 dma_sync_single_for_cpu(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
784 list_len * sizeof(u64), DMA_TO_DEVICE);
785
786 for (i = 0; i < list_len; ++i)
787 fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
788 MTHCA_MTT_FLAG_PRESENT);
789
790 dma_sync_single_for_device(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
791 list_len * sizeof(u64), DMA_TO_DEVICE);
792
793 fmr->mem.arbel.mpt->key = cpu_to_be32(key);
794 fmr->mem.arbel.mpt->lkey = cpu_to_be32(key);
795 fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
796 fmr->mem.arbel.mpt->start = cpu_to_be64(iova);
797
798 wmb();
799
800 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
801
802 wmb();
803
804 return 0;
805}
806
807void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
808{
809 if (!fmr->maps)
810 return;
811
812 fmr->maps = 0;
813
814 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
815}
816
817void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
818{
819 if (!fmr->maps)
820 return;
821
822 fmr->maps = 0;
823
824 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
825}
826
827int mthca_init_mr_table(struct mthca_dev *dev)
828{
829 phys_addr_t addr;
830 int mpts, mtts, err, i;
831
832 err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
833 dev->limits.num_mpts,
834 ~0, dev->limits.reserved_mrws);
835 if (err)
836 return err;
837
838 if (!mthca_is_memfree(dev) &&
839 (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
840 dev->limits.fmr_reserved_mtts = 0;
841 else
842 dev->mthca_flags |= MTHCA_FLAG_FMR;
843
844 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
845 mthca_dbg(dev, "Memory key throughput optimization activated.\n");
846
847 err = mthca_buddy_init(&dev->mr_table.mtt_buddy,
848 fls(dev->limits.num_mtt_segs - 1));
849
850 if (err)
851 goto err_mtt_buddy;
852
853 dev->mr_table.tavor_fmr.mpt_base = NULL;
854 dev->mr_table.tavor_fmr.mtt_base = NULL;
855
856 if (dev->limits.fmr_reserved_mtts) {
857 i = fls(dev->limits.fmr_reserved_mtts - 1);
858
859 if (i >= 31) {
860 mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n");
861 err = -EINVAL;
862 goto err_fmr_mpt;
863 }
864 mpts = mtts = 1 << i;
865 } else {
866 mtts = dev->limits.num_mtt_segs;
867 mpts = dev->limits.num_mpts;
868 }
869
870 if (!mthca_is_memfree(dev) &&
871 (dev->mthca_flags & MTHCA_FLAG_FMR)) {
872
873 addr = pci_resource_start(dev->pdev, 4) +
874 ((pci_resource_len(dev->pdev, 4) - 1) &
875 dev->mr_table.mpt_base);
876
877 dev->mr_table.tavor_fmr.mpt_base =
878 ioremap(addr, mpts * sizeof(struct mthca_mpt_entry));
879
880 if (!dev->mr_table.tavor_fmr.mpt_base) {
881 mthca_warn(dev, "MPT ioremap for FMR failed.\n");
882 err = -ENOMEM;
883 goto err_fmr_mpt;
884 }
885
886 addr = pci_resource_start(dev->pdev, 4) +
887 ((pci_resource_len(dev->pdev, 4) - 1) &
888 dev->mr_table.mtt_base);
889
890 dev->mr_table.tavor_fmr.mtt_base =
891 ioremap(addr, mtts * dev->limits.mtt_seg_size);
892 if (!dev->mr_table.tavor_fmr.mtt_base) {
893 mthca_warn(dev, "MTT ioremap for FMR failed.\n");
894 err = -ENOMEM;
895 goto err_fmr_mtt;
896 }
897 }
898
899 if (dev->limits.fmr_reserved_mtts) {
900 err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1));
901 if (err)
902 goto err_fmr_mtt_buddy;
903
904
905 err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1));
906 if (err)
907 goto err_reserve_fmr;
908
909 dev->mr_table.fmr_mtt_buddy =
910 &dev->mr_table.tavor_fmr.mtt_buddy;
911 } else
912 dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy;
913
914
915 if (dev->limits.reserved_mtts) {
916 i = fls(dev->limits.reserved_mtts - 1);
917
918 if (mthca_alloc_mtt_range(dev, i,
919 dev->mr_table.fmr_mtt_buddy) == -1) {
920 mthca_warn(dev, "MTT table of order %d is too small.\n",
921 dev->mr_table.fmr_mtt_buddy->max_order);
922 err = -ENOMEM;
923 goto err_reserve_mtts;
924 }
925 }
926
927 return 0;
928
929err_reserve_mtts:
930err_reserve_fmr:
931 if (dev->limits.fmr_reserved_mtts)
932 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
933
934err_fmr_mtt_buddy:
935 if (dev->mr_table.tavor_fmr.mtt_base)
936 iounmap(dev->mr_table.tavor_fmr.mtt_base);
937
938err_fmr_mtt:
939 if (dev->mr_table.tavor_fmr.mpt_base)
940 iounmap(dev->mr_table.tavor_fmr.mpt_base);
941
942err_fmr_mpt:
943 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
944
945err_mtt_buddy:
946 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
947
948 return err;
949}
950
951void mthca_cleanup_mr_table(struct mthca_dev *dev)
952{
953
954 if (dev->limits.fmr_reserved_mtts)
955 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
956
957 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
958
959 if (dev->mr_table.tavor_fmr.mtt_base)
960 iounmap(dev->mr_table.tavor_fmr.mtt_base);
961 if (dev->mr_table.tavor_fmr.mpt_base)
962 iounmap(dev->mr_table.tavor_fmr.mpt_base);
963
964 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
965}
966
