diff options
Diffstat (limited to 'include/asm-x86_64/pci.h')
| -rw-r--r-- | include/asm-x86_64/pci.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/include/asm-x86_64/pci.h b/include/asm-x86_64/pci.h index eeb3088..fd03e15 100644 --- a/include/asm-x86_64/pci.h +++ b/include/asm-x86_64/pci.h @@ -42,18 +42,20 @@ int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); #include <asm/scatterlist.h> #include <linux/string.h> #include <asm/page.h> +#include <linux/dma-mapping.h> /* for have_iommu */ extern int iommu_setup(char *opt); -#ifdef CONFIG_GART_IOMMU /* The PCI address space does equal the physical memory * address space. The networking and block device layers use * this boolean for bounce buffer decisions * - * On AMD64 it mostly equals, but we set it to zero to tell some subsystems - * that an IOMMU is available. + * On AMD64 it mostly equals, but we set it to zero if a hardware + * IOMMU (gart) of sotware IOMMU (swiotlb) is available. */ -#define PCI_DMA_BUS_IS_PHYS (no_iommu ? 1 : 0) +#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) + +#ifdef CONFIG_GART_IOMMU /* * x86-64 always supports DAC, but sometimes it is useful to force @@ -79,7 +81,6 @@ extern int iommu_sac_force; #else /* No IOMMU */ -#define PCI_DMA_BUS_IS_PHYS 1 #define pci_dac_dma_supported(pci_dev, mask) 1 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) |