Merge branch 'misc-2.6.32' into release

[safe/jmp/linux-2.6] / lib / swiotlb.c

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index a012d93..ac25cd2 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -114,21 +114,11 @@ setup_io_tlb_npages(char *str)
 __setup("swiotlb=", setup_io_tlb_npages);
 /* make io_tlb_overflow tunable too? */
 
-dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
-{
-       return paddr;
-}
-
-phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
-{
-       return baddr;
-}
-
 /* Note that this doesn't work with highmem page */
 static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
                                      volatile void *address)
 {
-       return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
+       return phys_to_dma(hwdev, virt_to_phys(address));
 }
 
 static void swiotlb_print_info(unsigned long bytes)
@@ -567,7 +557,7 @@ void
 swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
                      dma_addr_t dev_addr)
 {
-       phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+       phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
 
        WARN_ON(irqs_disabled());
        if (!is_swiotlb_buffer(paddr))
@@ -591,12 +581,15 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
        printk(KERN_ERR "DMA: Out of SW-IOMMU space for %zu bytes at "
               "device %s\n", size, dev ? dev_name(dev) : "?");
 
-       if (size > io_tlb_overflow && do_panic) {
-               if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
-                       panic("DMA: Memory would be corrupted\n");
-               if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
-                       panic("DMA: Random memory would be DMAed\n");
-       }
+       if (size <= io_tlb_overflow || !do_panic)
+               return;
+
+       if (dir == DMA_BIDIRECTIONAL)
+               panic("DMA: Random memory could be DMA accessed\n");
+       if (dir == DMA_FROM_DEVICE)
+               panic("DMA: Random memory could be DMA written\n");
+       if (dir == DMA_TO_DEVICE)
+               panic("DMA: Random memory could be DMA read\n");
 }
 
 /*
@@ -612,7 +605,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
                            struct dma_attrs *attrs)
 {
        phys_addr_t phys = page_to_phys(page) + offset;
-       dma_addr_t dev_addr = swiotlb_phys_to_bus(dev, phys);
+       dma_addr_t dev_addr = phys_to_dma(dev, phys);
        void *map;
 
        BUG_ON(dir == DMA_NONE);
@@ -656,7 +649,7 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page);
 static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
                         size_t size, int dir)
 {
-       phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+       phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
 
        BUG_ON(dir == DMA_NONE);
 
@@ -699,7 +692,7 @@ static void
 swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
                    size_t size, int dir, int target)
 {
-       phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+       phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
 
        BUG_ON(dir == DMA_NONE);
 
@@ -788,7 +781,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
 
        for_each_sg(sgl, sg, nelems, i) {
                phys_addr_t paddr = sg_phys(sg);
-               dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr);
+               dma_addr_t dev_addr = phys_to_dma(hwdev, paddr);
 
                if (swiotlb_force ||
                    !dma_capable(hwdev, dev_addr, sg->length)) {