Pull bugzilla-3774 into release branch

[linux-2.6-omap-h63xx.git] / arch / x86_64 / kernel / pci-dma.c

diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c
index 651ccfb06697dae54fbd96ffde647f12e98e691d..05d745ede561320a6c50d0a47c5a3cbb26cdf1f1 100644 (file)
--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -8,7 +8,7 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <asm/io.h>
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/calgary.h>
 
 int iommu_merge __read_mostly = 0;
@@ -22,8 +22,7 @@ EXPORT_SYMBOL(bad_dma_address);
 int iommu_bio_merge __read_mostly = 0;
 EXPORT_SYMBOL(iommu_bio_merge);
 
-int iommu_sac_force __read_mostly = 0;
-EXPORT_SYMBOL(iommu_sac_force);
+static int iommu_sac_force __read_mostly = 0;
 
 int no_iommu __read_mostly;
 #ifdef CONFIG_IOMMU_DEBUG
@@ -322,5 +321,22 @@ static int __init pci_iommu_init(void)
        return 0;
 }
 
+void pci_iommu_shutdown(void)
+{
+       gart_iommu_shutdown();
+}
+
+#ifdef CONFIG_PCI
+/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
+
+static __devinit void via_no_dac(struct pci_dev *dev)
+{
+       if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
+               printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
+               forbid_dac = 1;
+       }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
+#endif
 /* Must execute after PCI subsystem */
 fs_initcall(pci_iommu_init);