diff options
author | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-09 08:14:49 -0500 |
---|---|---|
committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-03-05 14:35:18 -0500 |
commit | f62bc980e6fd26434012c0d5676ecb17179d9ee4 (patch) | |
tree | 515d946a1739eb9a6bbcce215d8be62ae5695b09 /lib/dma-debug.c | |
parent | 2d62ece14fe04168a7d16688ddd2d17ac472268c (diff) |
dma-debug: add checking for map/unmap_page/single
Impact: add debug callbacks for dma_{un}map_[page|single]
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'lib/dma-debug.c')
-rw-r--r-- | lib/dma-debug.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index d0cb47a4211e..a2ed2b769685 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c | |||
@@ -566,3 +566,56 @@ out: | |||
566 | 566 | ||
567 | } | 567 | } |
568 | 568 | ||
569 | void debug_dma_map_page(struct device *dev, struct page *page, size_t offset, | ||
570 | size_t size, int direction, dma_addr_t dma_addr, | ||
571 | bool map_single) | ||
572 | { | ||
573 | struct dma_debug_entry *entry; | ||
574 | |||
575 | if (unlikely(global_disable)) | ||
576 | return; | ||
577 | |||
578 | if (unlikely(dma_mapping_error(dev, dma_addr))) | ||
579 | return; | ||
580 | |||
581 | entry = dma_entry_alloc(); | ||
582 | if (!entry) | ||
583 | return; | ||
584 | |||
585 | entry->dev = dev; | ||
586 | entry->type = dma_debug_page; | ||
587 | entry->paddr = page_to_phys(page) + offset; | ||
588 | entry->dev_addr = dma_addr; | ||
589 | entry->size = size; | ||
590 | entry->direction = direction; | ||
591 | |||
592 | if (map_single) { | ||
593 | entry->type = dma_debug_single; | ||
594 | check_for_stack(dev, page_address(page) + offset); | ||
595 | } | ||
596 | |||
597 | add_dma_entry(entry); | ||
598 | } | ||
599 | EXPORT_SYMBOL(debug_dma_map_page); | ||
600 | |||
601 | void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, | ||
602 | size_t size, int direction, bool map_single) | ||
603 | { | ||
604 | struct dma_debug_entry ref = { | ||
605 | .type = dma_debug_page, | ||
606 | .dev = dev, | ||
607 | .dev_addr = addr, | ||
608 | .size = size, | ||
609 | .direction = direction, | ||
610 | }; | ||
611 | |||
612 | if (unlikely(global_disable)) | ||
613 | return; | ||
614 | |||
615 | if (map_single) | ||
616 | ref.type = dma_debug_single; | ||
617 | |||
618 | check_unmap(&ref); | ||
619 | } | ||
620 | EXPORT_SYMBOL(debug_dma_unmap_page); | ||
621 | |||