2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/slab.h>
35 #include <linux/errno.h>
37 #include "mthca_dev.h"
38 #include "mthca_cmd.h"
39 #include "mthca_memfree.h"
42 struct mthca_buddy *buddy;
48 * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
50 struct mthca_mpt_entry {
59 __be32 window_count_limit;
61 __be32 mtt_sz; /* Arbel only */
63 } __attribute__((packed));
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)
71 #define MTHCA_MTT_FLAG_PRESENT 1
73 #define MTHCA_MPT_STATUS_SW 0xF0
74 #define MTHCA_MPT_STATUS_HW 0x00
76 #define SINAI_FMR_KEY_INC 0x1000000
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)
84 static u32 mthca_buddy_alloc(struct mthca_buddy *buddy, int order)
90 spin_lock(&buddy->lock);
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);
100 spin_unlock(&buddy->lock);
104 clear_bit(seg, buddy->bits[o]);
105 --buddy->num_free[o];
110 set_bit(seg ^ 1, buddy->bits[o]);
111 ++buddy->num_free[o];
114 spin_unlock(&buddy->lock);
121 static void mthca_buddy_free(struct mthca_buddy *buddy, u32 seg, int order)
125 spin_lock(&buddy->lock);
127 while (test_bit(seg ^ 1, buddy->bits[order])) {
128 clear_bit(seg ^ 1, buddy->bits[order]);
129 --buddy->num_free[order];
134 set_bit(seg, buddy->bits[order]);
135 ++buddy->num_free[order];
137 spin_unlock(&buddy->lock);
140 static int mthca_buddy_init(struct mthca_buddy *buddy, int max_order)
144 buddy->max_order = max_order;
145 spin_lock_init(&buddy->lock);
147 buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *),
149 buddy->num_free = kzalloc((buddy->max_order + 1) * sizeof (int *),
151 if (!buddy->bits || !buddy->num_free)
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);
159 bitmap_zero(buddy->bits[i],
160 1 << (buddy->max_order - i));
163 set_bit(0, buddy->bits[buddy->max_order]);
164 buddy->num_free[buddy->max_order] = 1;
169 for (i = 0; i <= buddy->max_order; ++i)
170 kfree(buddy->bits[i]);
174 kfree(buddy->num_free);
179 static void mthca_buddy_cleanup(struct mthca_buddy *buddy)
183 for (i = 0; i <= buddy->max_order; ++i)
184 kfree(buddy->bits[i]);
187 kfree(buddy->num_free);
190 static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order,
191 struct mthca_buddy *buddy)
193 u32 seg = mthca_buddy_alloc(buddy, order);
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);
208 static struct mthca_mtt *__mthca_alloc_mtt(struct mthca_dev *dev, int size,
209 struct mthca_buddy *buddy)
211 struct mthca_mtt *mtt;
215 return ERR_PTR(-EINVAL);
217 mtt = kmalloc(sizeof *mtt, GFP_KERNEL);
219 return ERR_PTR(-ENOMEM);
223 for (i = MTHCA_MTT_SEG_SIZE / 8; i < size; i <<= 1)
226 mtt->first_seg = mthca_alloc_mtt_range(dev, mtt->order, buddy);
227 if (mtt->first_seg == -1) {
229 return ERR_PTR(-ENOMEM);
235 struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size)
237 return __mthca_alloc_mtt(dev, size, &dev->mr_table.mtt_buddy);
240 void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt)
245 mthca_buddy_free(mtt->buddy, mtt->first_seg, mtt->order);
247 mthca_table_put_range(dev, dev->mr_table.mtt_table,
249 mtt->first_seg + (1 << mtt->order) - 1);
254 static int __mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
255 int start_index, u64 *buffer_list, int list_len)
257 struct mthca_mailbox *mailbox;
263 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
265 return PTR_ERR(mailbox);
266 mtt_entry = mailbox->buf;
268 while (list_len > 0) {
269 mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
270 mtt->first_seg * MTHCA_MTT_SEG_SIZE +
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);
278 * If we have an odd number of entries to write, add
279 * one more dummy entry for firmware efficiency.
282 mtt_entry[i + 2] = 0;
284 err = mthca_WRITE_MTT(dev, mailbox, (i + 1) & ~1, &status);
286 mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
290 mthca_warn(dev, "WRITE_MTT returned status 0x%02x\n",
302 mthca_free_mailbox(dev, mailbox);
306 int mthca_write_mtt_size(struct mthca_dev *dev)
308 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
309 !(dev->mthca_flags & MTHCA_FLAG_FMR))
311 * Be friendly to WRITE_MTT command
312 * and leave two empty slots for the
313 * index and reserved fields of the
316 return PAGE_SIZE / sizeof (u64) - 2;
318 /* For Arbel, all MTTs must fit in the same page. */
319 return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff;
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)
329 mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * MTHCA_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),
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)
341 dma_addr_t dma_handle;
343 int s = start_index * sizeof (u64);
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 % MTHCA_MTT_SEG_SIZE);
350 mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg +
351 s / MTHCA_MTT_SEG_SIZE, &dma_handle);
355 for (i = 0; i < list_len; ++i)
356 mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT);
358 dma_sync_single(&dev->pdev->dev, dma_handle, list_len * sizeof (u64), DMA_TO_DEVICE);
361 int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
362 int start_index, u64 *buffer_list, int list_len)
364 int size = mthca_write_mtt_size(dev);
367 if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
368 !(dev->mthca_flags & MTHCA_FLAG_FMR))
369 return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len);
371 while (list_len > 0) {
372 chunk = min(size, list_len);
373 if (mthca_is_memfree(dev))
374 mthca_arbel_write_mtt_seg(dev, mtt, start_index,
377 mthca_tavor_write_mtt_seg(dev, mtt, start_index,
381 start_index += chunk;
382 buffer_list += chunk;
388 static inline u32 tavor_hw_index_to_key(u32 ind)
393 static inline u32 tavor_key_to_hw_index(u32 key)
398 static inline u32 arbel_hw_index_to_key(u32 ind)
400 return (ind >> 24) | (ind << 8);
403 static inline u32 arbel_key_to_hw_index(u32 key)
405 return (key << 24) | (key >> 8);
408 static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
410 if (mthca_is_memfree(dev))
411 return arbel_hw_index_to_key(ind);
413 return tavor_hw_index_to_key(ind);
416 static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
418 if (mthca_is_memfree(dev))
419 return arbel_key_to_hw_index(key);
421 return tavor_key_to_hw_index(key);
424 static inline u32 adjust_key(struct mthca_dev *dev, u32 key)
426 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
427 return ((key << 20) & 0x800000) | (key & 0x7fffff);
432 int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
433 u64 iova, u64 total_size, u32 access, struct mthca_mr *mr)
435 struct mthca_mailbox *mailbox;
436 struct mthca_mpt_entry *mpt_entry;
442 WARN_ON(buffer_size_shift >= 32);
444 key = mthca_alloc(&dev->mr_table.mpt_alloc);
447 key = adjust_key(dev, key);
448 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
450 if (mthca_is_memfree(dev)) {
451 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
453 goto err_out_mpt_free;
456 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
457 if (IS_ERR(mailbox)) {
458 err = PTR_ERR(mailbox);
461 mpt_entry = mailbox->buf;
463 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
465 MTHCA_MPT_FLAG_REGION |
468 mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL);
470 mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
471 mpt_entry->key = cpu_to_be32(key);
472 mpt_entry->pd = cpu_to_be32(pd);
473 mpt_entry->start = cpu_to_be64(iova);
474 mpt_entry->length = cpu_to_be64(total_size);
476 memset(&mpt_entry->lkey, 0,
477 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
481 cpu_to_be64(dev->mr_table.mtt_base +
482 mr->mtt->first_seg * MTHCA_MTT_SEG_SIZE);
485 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
486 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
488 printk("[%02x] ", i * 4);
489 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
490 if ((i + 1) % 4 == 0)
495 err = mthca_SW2HW_MPT(dev, mailbox,
496 key & (dev->limits.num_mpts - 1),
499 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
500 goto err_out_mailbox;
502 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
505 goto err_out_mailbox;
508 mthca_free_mailbox(dev, mailbox);
512 mthca_free_mailbox(dev, mailbox);
515 mthca_table_put(dev, dev->mr_table.mpt_table, key);
518 mthca_free(&dev->mr_table.mpt_alloc, key);
522 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
523 u32 access, struct mthca_mr *mr)
526 return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr);
529 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
530 u64 *buffer_list, int buffer_size_shift,
531 int list_len, u64 iova, u64 total_size,
532 u32 access, struct mthca_mr *mr)
536 mr->mtt = mthca_alloc_mtt(dev, list_len);
538 return PTR_ERR(mr->mtt);
540 err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
542 mthca_free_mtt(dev, mr->mtt);
546 err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
547 total_size, access, mr);
549 mthca_free_mtt(dev, mr->mtt);
555 static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
557 mthca_table_put(dev, dev->mr_table.mpt_table,
558 key_to_hw_index(dev, lkey));
560 mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey));
563 void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
568 err = mthca_HW2SW_MPT(dev, NULL,
569 key_to_hw_index(dev, mr->ibmr.lkey) &
570 (dev->limits.num_mpts - 1),
573 mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
575 mthca_warn(dev, "HW2SW_MPT returned status 0x%02x\n",
578 mthca_free_region(dev, mr->ibmr.lkey);
579 mthca_free_mtt(dev, mr->mtt);
582 int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
583 u32 access, struct mthca_fmr *mr)
585 struct mthca_mpt_entry *mpt_entry;
586 struct mthca_mailbox *mailbox;
590 int list_len = mr->attr.max_pages;
594 if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
597 /* For Arbel, all MTTs must fit in the same page. */
598 if (mthca_is_memfree(dev) &&
599 mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
604 key = mthca_alloc(&dev->mr_table.mpt_alloc);
607 key = adjust_key(dev, key);
609 idx = key & (dev->limits.num_mpts - 1);
610 mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
612 if (mthca_is_memfree(dev)) {
613 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
615 goto err_out_mpt_free;
617 mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
618 BUG_ON(!mr->mem.arbel.mpt);
620 mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
621 sizeof *(mr->mem.tavor.mpt) * idx;
623 mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
624 if (IS_ERR(mr->mtt)) {
625 err = PTR_ERR(mr->mtt);
629 mtt_seg = mr->mtt->first_seg * MTHCA_MTT_SEG_SIZE;
631 if (mthca_is_memfree(dev)) {
632 mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
634 &mr->mem.arbel.dma_handle);
635 BUG_ON(!mr->mem.arbel.mtts);
637 mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
639 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
640 if (IS_ERR(mailbox)) {
641 err = PTR_ERR(mailbox);
642 goto err_out_free_mtt;
645 mpt_entry = mailbox->buf;
647 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
649 MTHCA_MPT_FLAG_REGION |
652 mpt_entry->page_size = cpu_to_be32(mr->attr.page_shift - 12);
653 mpt_entry->key = cpu_to_be32(key);
654 mpt_entry->pd = cpu_to_be32(pd);
655 memset(&mpt_entry->start, 0,
656 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
657 mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
660 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
661 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
663 printk("[%02x] ", i * 4);
664 printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
665 if ((i + 1) % 4 == 0)
670 err = mthca_SW2HW_MPT(dev, mailbox,
671 key & (dev->limits.num_mpts - 1),
674 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
675 goto err_out_mailbox_free;
678 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
681 goto err_out_mailbox_free;
684 mthca_free_mailbox(dev, mailbox);
687 err_out_mailbox_free:
688 mthca_free_mailbox(dev, mailbox);
691 mthca_free_mtt(dev, mr->mtt);
694 mthca_table_put(dev, dev->mr_table.mpt_table, key);
697 mthca_free(&dev->mr_table.mpt_alloc, key);
701 int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
706 mthca_free_region(dev, fmr->ibmr.lkey);
707 mthca_free_mtt(dev, fmr->mtt);
712 static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
713 int list_len, u64 iova)
717 if (list_len > fmr->attr.max_pages)
720 page_mask = (1 << fmr->attr.page_shift) - 1;
722 /* We are getting page lists, so va must be page aligned. */
723 if (iova & page_mask)
726 /* Trust the user not to pass misaligned data in page_list */
728 for (i = 0; i < list_len; ++i) {
729 if (page_list[i] & ~page_mask)
733 if (fmr->maps >= fmr->attr.max_maps)
740 int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
741 int list_len, u64 iova)
743 struct mthca_fmr *fmr = to_mfmr(ibfmr);
744 struct mthca_dev *dev = to_mdev(ibfmr->device);
745 struct mthca_mpt_entry mpt_entry;
749 err = mthca_check_fmr(fmr, page_list, list_len, iova);
755 key = tavor_key_to_hw_index(fmr->ibmr.lkey);
756 key += dev->limits.num_mpts;
757 fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
759 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
761 for (i = 0; i < list_len; ++i) {
762 __be64 mtt_entry = cpu_to_be64(page_list[i] |
763 MTHCA_MTT_FLAG_PRESENT);
764 mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
767 mpt_entry.lkey = cpu_to_be32(key);
768 mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
769 mpt_entry.start = cpu_to_be64(iova);
771 __raw_writel((__force u32) mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
772 memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
773 offsetof(struct mthca_mpt_entry, window_count) -
774 offsetof(struct mthca_mpt_entry, start));
776 writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
781 int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
782 int list_len, u64 iova)
784 struct mthca_fmr *fmr = to_mfmr(ibfmr);
785 struct mthca_dev *dev = to_mdev(ibfmr->device);
789 err = mthca_check_fmr(fmr, page_list, list_len, iova);
795 key = arbel_key_to_hw_index(fmr->ibmr.lkey);
796 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
797 key += SINAI_FMR_KEY_INC;
799 key += dev->limits.num_mpts;
800 fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
802 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
806 for (i = 0; i < list_len; ++i)
807 fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
808 MTHCA_MTT_FLAG_PRESENT);
810 dma_sync_single(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
811 list_len * sizeof(u64), DMA_TO_DEVICE);
813 fmr->mem.arbel.mpt->key = cpu_to_be32(key);
814 fmr->mem.arbel.mpt->lkey = cpu_to_be32(key);
815 fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
816 fmr->mem.arbel.mpt->start = cpu_to_be64(iova);
820 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
827 void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
834 writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
837 void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
844 *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
847 int mthca_init_mr_table(struct mthca_dev *dev)
850 int mpts, mtts, err, i;
852 err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
853 dev->limits.num_mpts,
854 ~0, dev->limits.reserved_mrws);
858 if (!mthca_is_memfree(dev) &&
859 (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
860 dev->limits.fmr_reserved_mtts = 0;
862 dev->mthca_flags |= MTHCA_FLAG_FMR;
864 if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
865 mthca_dbg(dev, "Memory key throughput optimization activated.\n");
867 err = mthca_buddy_init(&dev->mr_table.mtt_buddy,
868 fls(dev->limits.num_mtt_segs - 1));
873 dev->mr_table.tavor_fmr.mpt_base = NULL;
874 dev->mr_table.tavor_fmr.mtt_base = NULL;
876 if (dev->limits.fmr_reserved_mtts) {
877 i = fls(dev->limits.fmr_reserved_mtts - 1);
880 mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n");
884 mpts = mtts = 1 << i;
886 mtts = dev->limits.num_mtt_segs;
887 mpts = dev->limits.num_mpts;
890 if (!mthca_is_memfree(dev) &&
891 (dev->mthca_flags & MTHCA_FLAG_FMR)) {
893 addr = pci_resource_start(dev->pdev, 4) +
894 ((pci_resource_len(dev->pdev, 4) - 1) &
895 dev->mr_table.mpt_base);
897 dev->mr_table.tavor_fmr.mpt_base =
898 ioremap(addr, mpts * sizeof(struct mthca_mpt_entry));
900 if (!dev->mr_table.tavor_fmr.mpt_base) {
901 mthca_warn(dev, "MPT ioremap for FMR failed.\n");
906 addr = pci_resource_start(dev->pdev, 4) +
907 ((pci_resource_len(dev->pdev, 4) - 1) &
908 dev->mr_table.mtt_base);
910 dev->mr_table.tavor_fmr.mtt_base =
911 ioremap(addr, mtts * MTHCA_MTT_SEG_SIZE);
912 if (!dev->mr_table.tavor_fmr.mtt_base) {
913 mthca_warn(dev, "MTT ioremap for FMR failed.\n");
919 if (dev->limits.fmr_reserved_mtts) {
920 err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1));
922 goto err_fmr_mtt_buddy;
924 /* Prevent regular MRs from using FMR keys */
925 err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1));
927 goto err_reserve_fmr;
929 dev->mr_table.fmr_mtt_buddy =
930 &dev->mr_table.tavor_fmr.mtt_buddy;
932 dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy;
934 /* FMR table is always the first, take reserved MTTs out of there */
935 if (dev->limits.reserved_mtts) {
936 i = fls(dev->limits.reserved_mtts - 1);
938 if (mthca_alloc_mtt_range(dev, i,
939 dev->mr_table.fmr_mtt_buddy) == -1) {
940 mthca_warn(dev, "MTT table of order %d is too small.\n",
941 dev->mr_table.fmr_mtt_buddy->max_order);
943 goto err_reserve_mtts;
951 if (dev->limits.fmr_reserved_mtts)
952 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
955 if (dev->mr_table.tavor_fmr.mtt_base)
956 iounmap(dev->mr_table.tavor_fmr.mtt_base);
959 if (dev->mr_table.tavor_fmr.mpt_base)
960 iounmap(dev->mr_table.tavor_fmr.mpt_base);
963 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
966 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
971 void mthca_cleanup_mr_table(struct mthca_dev *dev)
973 /* XXX check if any MRs are still allocated? */
974 if (dev->limits.fmr_reserved_mtts)
975 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
977 mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
979 if (dev->mr_table.tavor_fmr.mtt_base)
980 iounmap(dev->mr_table.tavor_fmr.mtt_base);
981 if (dev->mr_table.tavor_fmr.mpt_base)
982 iounmap(dev->mr_table.tavor_fmr.mpt_base);
984 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);