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authorJoerg Roedel <joerg.roedel@amd.com>2009-01-09 14:14:49 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-03-05 20:35:18 +0100
commitf62bc980e6fd26434012c0d5676ecb17179d9ee4 (patch)
tree515d946a1739eb9a6bbcce215d8be62ae5695b09 /lib
parent2d62ece14fe04168a7d16688ddd2d17ac472268c (diff)
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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')
-rw-r--r--lib/dma-debug.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d0cb47a4211..a2ed2b76968 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -566,3 +566,56 @@ out:
}
+void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
+ size_t size, int direction, dma_addr_t dma_addr,
+ bool map_single)
+{
+ struct dma_debug_entry *entry;
+
+ if (unlikely(global_disable))
+ return;
+
+ if (unlikely(dma_mapping_error(dev, dma_addr)))
+ return;
+
+ entry = dma_entry_alloc();
+ if (!entry)
+ return;
+
+ entry->dev = dev;
+ entry->type = dma_debug_page;
+ entry->paddr = page_to_phys(page) + offset;
+ entry->dev_addr = dma_addr;
+ entry->size = size;
+ entry->direction = direction;
+
+ if (map_single) {
+ entry->type = dma_debug_single;
+ check_for_stack(dev, page_address(page) + offset);
+ }
+
+ add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_dma_map_page);
+
+void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, int direction, bool map_single)
+{
+ struct dma_debug_entry ref = {
+ .type = dma_debug_page,
+ .dev = dev,
+ .dev_addr = addr,
+ .size = size,
+ .direction = direction,
+ };
+
+ if (unlikely(global_disable))
+ return;
+
+ if (map_single)
+ ref.type = dma_debug_single;
+
+ check_unmap(&ref);
+}
+EXPORT_SYMBOL(debug_dma_unmap_page);
+