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IB/mthca: Replace dma_sync_single() use with proper functions
[firewire-audio.git] / drivers / infiniband / hw / mthca / mthca_mr.c
blob065b208998761b30f50c726c74de0dbfcfe05330
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
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
41 struct mthca_mtt {
42 struct mthca_buddy *buddy;
43 int order;
44 u32 first_seg;
45 };
46
47 /*
48 * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
49 */
50 struct 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; /* Arbel only */
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 * Buddy allocator for MTT segments (currently not very efficient
80 * since it doesn't keep a free list and just searches linearly
81 * through the bitmaps)
82 */
83
84 static 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
121 static 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
140 static 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 = kzalloc((buddy->max_order + 1) * sizeof (int *),
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
168 err_out_free:
169 for (i = 0; i <= buddy->max_order; ++i)
170 kfree(buddy->bits[i]);
171
172 err_out:
173 kfree(buddy->bits);
174 kfree(buddy->num_free);
175
176 return -ENOMEM;
177 }
178
179 static 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
190 static 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
208 static 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
235 struct 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
240 void 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
254 static 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 u8 status;
261 int i;
262
263 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
264 if (IS_ERR(mailbox))
265 return PTR_ERR(mailbox);
266 mtt_entry = mailbox->buf;
267
268 while (list_len > 0) {
269 mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
270 mtt->first_seg * dev->limits.mtt_seg_size +
271 start_index * 8);
272 mtt_entry[1] = 0;
273 for (i = 0; i < list_len && i < MTHCA_MAILBOX_SIZE / 8 - 2; ++i)
274 mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
275 MTHCA_MTT_FLAG_PRESENT);
276
277 /*
278 * If we have an odd number of entries to write, add
279 * one more dummy entry for firmware efficiency.
280 */
281 if (i & 1)
282 mtt_entry[i + 2] = 0;
283
284 err = mthca_WRITE_MTT(dev, mailbox, (i + 1) & ~1, &status);
285 if (err) {
286 mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
287 goto out;
288 }
289 if (status) {
290 mthca_warn(dev, "WRITE_MTT returned status 0x%02x\n",
291 status);
292 err = -EINVAL;
293 goto out;
294 }
295
296 list_len -= i;
297 start_index += i;
298 buffer_list += i;
299 }
300
301 out:
302 mthca_free_mailbox(dev, mailbox);
303 return err;
304 }
305
306 int mthca_write_mtt_size(struct mthca_dev *dev)
307 {
308 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
309 !(dev->mthca_flags & MTHCA_FLAG_FMR))
310 /*
311 * Be friendly to WRITE_MTT command
312 * and leave two empty slots for the
313 * index and reserved fields of the
314 * mailbox.
315 */
316 return PAGE_SIZE / sizeof (u64) - 2;
317
318 /* For Arbel, all MTTs must fit in the same page. */
319 return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff;
320 }
321
322 static void mthca_tavor_write_mtt_seg(struct mthca_dev *dev,
323 struct mthca_mtt *mtt, int start_index,
324 u64 *buffer_list, int list_len)
325 {
326 u64 __iomem *mtts;
327 int i;
328
329 mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * dev->limits.mtt_seg_size +
330 start_index * sizeof (u64);
331 for (i = 0; i < list_len; ++i)
332 mthca_write64_raw(cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT),
333 mtts + i);
334 }
335
336 static void mthca_arbel_write_mtt_seg(struct mthca_dev *dev,
337 struct mthca_mtt *mtt, int start_index,
338 u64 *buffer_list, int list_len)
339 {
340 __be64 *mtts;
341 dma_addr_t dma_handle;
342 int i;
343 int s = start_index * sizeof (u64);
344
345 /* For Arbel, all MTTs must fit in the same page. */
346 BUG_ON(s / PAGE_SIZE != (s + list_len * sizeof(u64) - 1) / PAGE_SIZE);
347 /* Require full segments */
348 BUG_ON(s % dev->limits.mtt_seg_size);
349
350 mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg +
351 s / dev->limits.mtt_seg_size, &dma_handle);
352
353 BUG_ON(!mtts);
354
355 dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
356 list_len * sizeof (u64), DMA_TO_DEVICE);
357
358 for (i = 0; i < list_len; ++i)
359 mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT);
360
361 dma_sync_single_for_device(&dev->pdev->dev, dma_handle,
362 list_len * sizeof (u64), DMA_TO_DEVICE);
363 }
364
365 int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
366 int start_index, u64 *buffer_list, int list_len)
367 {
368 int size = mthca_write_mtt_size(dev);
369 int chunk;
370
371 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
372 !(dev->mthca_flags & MTHCA_FLAG_FMR))
373 return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len);
374
375 while (list_len > 0) {
376 chunk = min(size, list_len);
377 if (mthca_is_memfree(dev))
378 mthca_arbel_write_mtt_seg(dev, mtt, start_index,
379 buffer_list, chunk);
380 else
381 mthca_tavor_write_mtt_seg(dev, mtt, start_index,
382 buffer_list, chunk);
383
384 list_len -= chunk;
385 start_index += chunk;
386 buffer_list += chunk;
387 }
388
389 return 0;
390 }
391
392 static inline u32 tavor_hw_index_to_key(u32 ind)
393 {
394 return ind;
395 }
396
397 static inline u32 tavor_key_to_hw_index(u32 key)
398 {
399 return key;
400 }
401
402 static inline u32 arbel_hw_index_to_key(u32 ind)
403 {
404 return (ind >> 24) | (ind << 8);
405 }
406
407 static inline u32 arbel_key_to_hw_index(u32 key)
408 {
409 return (key << 24) | (key >> 8);
410 }
411
412 static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
413 {
414 if (mthca_is_memfree(dev))
415 return arbel_hw_index_to_key(ind);
416 else
417 return tavor_hw_index_to_key(ind);
418 }
419
420 static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
421 {
422 if (mthca_is_memfree(dev))
423 return arbel_key_to_hw_index(key);
424 else
425 return tavor_key_to_hw_index(key);
426 }
427
428 static inline u32 adjust_key(struct mthca_dev *dev, u32 key)
429 {
430 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
431 return ((key << 20) & 0x800000) | (key & 0x7fffff);
432 else
433 return key;
434 }
435
436 int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
437 u64 iova, u64 total_size, u32 access, struct mthca_mr *mr)
438 {
439 struct mthca_mailbox *mailbox;
440 struct mthca_mpt_entry *mpt_entry;
441 u32 key;
442 int i;
443 int err;
444 u8 status;
445
446 WARN_ON(buffer_size_shift >= 32);
447
448 key = mthca_alloc(&dev->mr_table.mpt_alloc);
449 if (key == -1)
450 return -ENOMEM;
451 key = adjust_key(dev, key);
452 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
453
454 if (mthca_is_memfree(dev)) {
455 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
456 if (err)
457 goto err_out_mpt_free;
458 }
459
460 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
461 if (IS_ERR(mailbox)) {
462 err = PTR_ERR(mailbox);
463 goto err_out_table;
464 }
465 mpt_entry = mailbox->buf;
466
467 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
468 MTHCA_MPT_FLAG_MIO |
469 MTHCA_MPT_FLAG_REGION |
470 access);
471 if (!mr->mtt)
472 mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL);
473
474 mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
475 mpt_entry->key = cpu_to_be32(key);
476 mpt_entry->pd = cpu_to_be32(pd);
477 mpt_entry->start = cpu_to_be64(iova);
478 mpt_entry->length = cpu_to_be64(total_size);
479
480 memset(&mpt_entry->lkey, 0,
481 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
482
483 if (mr->mtt)
484 mpt_entry->mtt_seg =
485 cpu_to_be64(dev->mr_table.mtt_base +
486 mr->mtt->first_seg * dev->limits.mtt_seg_size);
487
488 if (0) {
489 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
490 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
491 if (i % 4 == 0)
492 printk("[%02x] ", i * 4);
493 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
494 if ((i + 1) % 4 == 0)
495 printk("\n");
496 }
497 }
498
499 err = mthca_SW2HW_MPT(dev, mailbox,
500 key & (dev->limits.num_mpts - 1),
501 &status);
502 if (err) {
503 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
504 goto err_out_mailbox;
505 } else if (status) {
506 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
507 status);
508 err = -EINVAL;
509 goto err_out_mailbox;
510 }
511
512 mthca_free_mailbox(dev, mailbox);
513 return err;
514
515 err_out_mailbox:
516 mthca_free_mailbox(dev, mailbox);
517
518 err_out_table:
519 mthca_table_put(dev, dev->mr_table.mpt_table, key);
520
521 err_out_mpt_free:
522 mthca_free(&dev->mr_table.mpt_alloc, key);
523 return err;
524 }
525
526 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
527 u32 access, struct mthca_mr *mr)
528 {
529 mr->mtt = NULL;
530 return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr);
531 }
532
533 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
534 u64 *buffer_list, int buffer_size_shift,
535 int list_len, u64 iova, u64 total_size,
536 u32 access, struct mthca_mr *mr)
537 {
538 int err;
539
540 mr->mtt = mthca_alloc_mtt(dev, list_len);
541 if (IS_ERR(mr->mtt))
542 return PTR_ERR(mr->mtt);
543
544 err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
545 if (err) {
546 mthca_free_mtt(dev, mr->mtt);
547 return err;
548 }
549
550 err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
551 total_size, access, mr);
552 if (err)
553 mthca_free_mtt(dev, mr->mtt);
554
555 return err;
556 }
557
558 /* Free mr or fmr */
559 static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
560 {
561 mthca_table_put(dev, dev->mr_table.mpt_table,
562 key_to_hw_index(dev, lkey));
563
564 mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey));
565 }
566
567 void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
568 {
569 int err;
570 u8 status;
571
572 err = mthca_HW2SW_MPT(dev, NULL,
573 key_to_hw_index(dev, mr->ibmr.lkey) &
574 (dev->limits.num_mpts - 1),
575 &status);
576 if (err)
577 mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
578 else if (status)
579 mthca_warn(dev, "HW2SW_MPT returned status 0x%02x\n",
580 status);
581
582 mthca_free_region(dev, mr->ibmr.lkey);
583 mthca_free_mtt(dev, mr->mtt);
584 }
585
586 int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
587 u32 access, struct mthca_fmr *mr)
588 {
589 struct mthca_mpt_entry *mpt_entry;
590 struct mthca_mailbox *mailbox;
591 u64 mtt_seg;
592 u32 key, idx;
593 u8 status;
594 int list_len = mr->attr.max_pages;
595 int err = -ENOMEM;
596 int i;
597
598 if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
599 return -EINVAL;
600
601 /* For Arbel, all MTTs must fit in the same page. */
602 if (mthca_is_memfree(dev) &&
603 mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
604 return -EINVAL;
605
606 mr->maps = 0;
607
608 key = mthca_alloc(&dev->mr_table.mpt_alloc);
609 if (key == -1)
610 return -ENOMEM;
611 key = adjust_key(dev, key);
612
613 idx = key & (dev->limits.num_mpts - 1);
614 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
615
616 if (mthca_is_memfree(dev)) {
617 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
618 if (err)
619 goto err_out_mpt_free;
620
621 mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
622 BUG_ON(!mr->mem.arbel.mpt);
623 } else
624 mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
625 sizeof *(mr->mem.tavor.mpt) * idx;
626
627 mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
628 if (IS_ERR(mr->mtt)) {
629 err = PTR_ERR(mr->mtt);
630 goto err_out_table;
631 }
632
633 mtt_seg = mr->mtt->first_seg * dev->limits.mtt_seg_size;
634
635 if (mthca_is_memfree(dev)) {
636 mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
637 mr->mtt->first_seg,
638 &mr->mem.arbel.dma_handle);
639 BUG_ON(!mr->mem.arbel.mtts);
640 } else
641 mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
642
643 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
644 if (IS_ERR(mailbox)) {
645 err = PTR_ERR(mailbox);
646 goto err_out_free_mtt;
647 }
648
649 mpt_entry = mailbox->buf;
650
651 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
652 MTHCA_MPT_FLAG_MIO |
653 MTHCA_MPT_FLAG_REGION |
654 access);
655
656 mpt_entry->page_size = cpu_to_be32(mr->attr.page_shift - 12);
657 mpt_entry->key = cpu_to_be32(key);
658 mpt_entry->pd = cpu_to_be32(pd);
659 memset(&mpt_entry->start, 0,
660 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
661 mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
662
663 if (0) {
664 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
665 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
666 if (i % 4 == 0)
667 printk("[%02x] ", i * 4);
668 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
669 if ((i + 1) % 4 == 0)
670 printk("\n");
671 }
672 }
673
674 err = mthca_SW2HW_MPT(dev, mailbox,
675 key & (dev->limits.num_mpts - 1),
676 &status);
677 if (err) {
678 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
679 goto err_out_mailbox_free;
680 }
681 if (status) {
682 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
683 status);
684 err = -EINVAL;
685 goto err_out_mailbox_free;
686 }
687
688 mthca_free_mailbox(dev, mailbox);
689 return 0;
690
691 err_out_mailbox_free:
692 mthca_free_mailbox(dev, mailbox);
693
694 err_out_free_mtt:
695 mthca_free_mtt(dev, mr->mtt);
696
697 err_out_table:
698 mthca_table_put(dev, dev->mr_table.mpt_table, key);
699
700 err_out_mpt_free:
701 mthca_free(&dev->mr_table.mpt_alloc, key);
702 return err;
703 }
704
705 int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
706 {
707 if (fmr->maps)
708 return -EBUSY;
709
710 mthca_free_region(dev, fmr->ibmr.lkey);
711 mthca_free_mtt(dev, fmr->mtt);
712
713 return 0;
714 }
715
716 static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
717 int list_len, u64 iova)
718 {
719 int i, page_mask;
720
721 if (list_len > fmr->attr.max_pages)
722 return -EINVAL;
723
724 page_mask = (1 << fmr->attr.page_shift) - 1;
725
726 /* We are getting page lists, so va must be page aligned. */
727 if (iova & page_mask)
728 return -EINVAL;
729
730 /* Trust the user not to pass misaligned data in page_list */
731 if (0)
732 for (i = 0; i < list_len; ++i) {
733 if (page_list[i] & ~page_mask)
734 return -EINVAL;
735 }
736
737 if (fmr->maps >= fmr->attr.max_maps)
738 return -EINVAL;
739
740 return 0;
741 }
742
743
744 int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
745 int list_len, u64 iova)
746 {
747 struct mthca_fmr *fmr = to_mfmr(ibfmr);
748 struct mthca_dev *dev = to_mdev(ibfmr->device);
749 struct mthca_mpt_entry mpt_entry;
750 u32 key;
751 int i, err;
752
753 err = mthca_check_fmr(fmr, page_list, list_len, iova);
754 if (err)
755 return err;
756
757 ++fmr->maps;
758
759 key = tavor_key_to_hw_index(fmr->ibmr.lkey);
760 key += dev->limits.num_mpts;
761 fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
762
763 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
764
765 for (i = 0; i < list_len; ++i) {
766 __be64 mtt_entry = cpu_to_be64(page_list[i] |
767 MTHCA_MTT_FLAG_PRESENT);
768 mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
769 }
770
771 mpt_entry.lkey = cpu_to_be32(key);
772 mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
773 mpt_entry.start = cpu_to_be64(iova);
774
775 __raw_writel((__force u32) mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
776 memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
777 offsetof(struct mthca_mpt_entry, window_count) -
778 offsetof(struct mthca_mpt_entry, start));
779
780 writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
781
782 return 0;
783 }
784
785 int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
786 int list_len, u64 iova)
787 {
788 struct mthca_fmr *fmr = to_mfmr(ibfmr);
789 struct mthca_dev *dev = to_mdev(ibfmr->device);
790 u32 key;
791 int i, err;
792
793 err = mthca_check_fmr(fmr, page_list, list_len, iova);
794 if (err)
795 return err;
796
797 ++fmr->maps;
798
799 key = arbel_key_to_hw_index(fmr->ibmr.lkey);
800 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
801 key += SINAI_FMR_KEY_INC;
802 else
803 key += dev->limits.num_mpts;
804 fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
805
806 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
807
808 wmb();
809
810 dma_sync_single_for_cpu(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
811 list_len * sizeof(u64), DMA_TO_DEVICE);
812
813 for (i = 0; i < list_len; ++i)
814 fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
815 MTHCA_MTT_FLAG_PRESENT);
816
817 dma_sync_single_for_device(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
818 list_len * sizeof(u64), DMA_TO_DEVICE);
819
820 fmr->mem.arbel.mpt->key = cpu_to_be32(key);
821 fmr->mem.arbel.mpt->lkey = cpu_to_be32(key);
822 fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
823 fmr->mem.arbel.mpt->start = cpu_to_be64(iova);
824
825 wmb();
826
827 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
828
829 wmb();
830
831 return 0;
832 }
833
834 void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
835 {
836 if (!fmr->maps)
837 return;
838
839 fmr->maps = 0;
840
841 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
842 }
843
844 void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
845 {
846 if (!fmr->maps)
847 return;
848
849 fmr->maps = 0;
850
851 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
852 }
853
854 int mthca_init_mr_table(struct mthca_dev *dev)
855 {
856 unsigned long addr;
857 int mpts, mtts, err, i;
858
859 err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
860 dev->limits.num_mpts,
861 ~0, dev->limits.reserved_mrws);
862 if (err)
863 return err;
864
865 if (!mthca_is_memfree(dev) &&
866 (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
867 dev->limits.fmr_reserved_mtts = 0;
868 else
869 dev->mthca_flags |= MTHCA_FLAG_FMR;
870
871 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
872 mthca_dbg(dev, "Memory key throughput optimization activated.\n");
873
874 err = mthca_buddy_init(&dev->mr_table.mtt_buddy,
875 fls(dev->limits.num_mtt_segs - 1));
876
877 if (err)
878 goto err_mtt_buddy;
879
880 dev->mr_table.tavor_fmr.mpt_base = NULL;
881 dev->mr_table.tavor_fmr.mtt_base = NULL;
882
883 if (dev->limits.fmr_reserved_mtts) {
884 i = fls(dev->limits.fmr_reserved_mtts - 1);
885
886 if (i >= 31) {
887 mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n");
888 err = -EINVAL;
889 goto err_fmr_mpt;
890 }
891 mpts = mtts = 1 << i;
892 } else {
893 mtts = dev->limits.num_mtt_segs;
894 mpts = dev->limits.num_mpts;
895 }
896
897 if (!mthca_is_memfree(dev) &&
898 (dev->mthca_flags & MTHCA_FLAG_FMR)) {
899
900 addr = pci_resource_start(dev->pdev, 4) +
901 ((pci_resource_len(dev->pdev, 4) - 1) &
902 dev->mr_table.mpt_base);
903
904 dev->mr_table.tavor_fmr.mpt_base =
905 ioremap(addr, mpts * sizeof(struct mthca_mpt_entry));
906
907 if (!dev->mr_table.tavor_fmr.mpt_base) {
908 mthca_warn(dev, "MPT ioremap for FMR failed.\n");
909 err = -ENOMEM;
910 goto err_fmr_mpt;
911 }
912
913 addr = pci_resource_start(dev->pdev, 4) +
914 ((pci_resource_len(dev->pdev, 4) - 1) &
915 dev->mr_table.mtt_base);
916
917 dev->mr_table.tavor_fmr.mtt_base =
918 ioremap(addr, mtts * dev->limits.mtt_seg_size);
919 if (!dev->mr_table.tavor_fmr.mtt_base) {
920 mthca_warn(dev, "MTT ioremap for FMR failed.\n");
921 err = -ENOMEM;
922 goto err_fmr_mtt;
923 }
924 }
925
926 if (dev->limits.fmr_reserved_mtts) {
927 err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1));
928 if (err)
929 goto err_fmr_mtt_buddy;
930
931 /* Prevent regular MRs from using FMR keys */
932 err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1));
933 if (err)
934 goto err_reserve_fmr;
935
936 dev->mr_table.fmr_mtt_buddy =
937 &dev->mr_table.tavor_fmr.mtt_buddy;
938 } else
939 dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy;
940
941 /* FMR table is always the first, take reserved MTTs out of there */
942 if (dev->limits.reserved_mtts) {
943 i = fls(dev->limits.reserved_mtts - 1);
944
945 if (mthca_alloc_mtt_range(dev, i,
946 dev->mr_table.fmr_mtt_buddy) == -1) {
947 mthca_warn(dev, "MTT table of order %d is too small.\n",
948 dev->mr_table.fmr_mtt_buddy->max_order);
949 err = -ENOMEM;
950 goto err_reserve_mtts;
951 }
952 }
953
954 return 0;
955
956 err_reserve_mtts:
957 err_reserve_fmr:
958 if (dev->limits.fmr_reserved_mtts)
959 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
960
961 err_fmr_mtt_buddy:
962 if (dev->mr_table.tavor_fmr.mtt_base)
963 iounmap(dev->mr_table.tavor_fmr.mtt_base);
964
965 err_fmr_mtt:
966 if (dev->mr_table.tavor_fmr.mpt_base)
967 iounmap(dev->mr_table.tavor_fmr.mpt_base);
968
969 err_fmr_mpt:
970 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
971
972 err_mtt_buddy:
973 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
974
975 return err;
976 }
977
978 void mthca_cleanup_mr_table(struct mthca_dev *dev)
979 {
980 /* XXX check if any MRs are still allocated? */
981 if (dev->limits.fmr_reserved_mtts)
982 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
983
984 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
985
986 if (dev->mr_table.tavor_fmr.mtt_base)
987 iounmap(dev->mr_table.tavor_fmr.mtt_base);
988 if (dev->mr_table.tavor_fmr.mpt_base)
989 iounmap(dev->mr_table.tavor_fmr.mpt_base);
990
991 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
992 }
AMDTP streaming driver for the Linux FireWire stack (Juju)