diff options
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 18 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma_32.c | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma_64.c | 15 | ||||
| -rw-r--r-- | include/asm-x86/dma-mapping.h | 2 |
4 files changed, 19 insertions, 29 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 91443361cb6..48cccbe51aa 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -1,12 +1,16 @@ #include <linux/dma-mapping.h> #include <linux/dmar.h> #include <linux/bootmem.h> +#include <linux/pci.h> #include <asm/proto.h> #include <asm/dma.h> #include <asm/gart.h> #include <asm/calgary.h> +int forbid_dac __read_mostly; +EXPORT_SYMBOL(forbid_dac); + const struct dma_mapping_ops *dma_ops; EXPORT_SYMBOL(dma_ops); @@ -121,3 +125,17 @@ void pci_iommu_shutdown(void) } /* Must execute after PCI subsystem */ fs_initcall(pci_iommu_init); + +#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 diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c index 9e8297657c3..6543bb30b65 100644 --- a/arch/x86/kernel/pci-dma_32.c +++ b/arch/x86/kernel/pci-dma_32.c @@ -157,9 +157,6 @@ EXPORT_SYMBOL(dma_mark_declared_memory_occupied); #ifdef CONFIG_PCI /* Many VIA bridges seem to corrupt data for DAC. Disable it here */ -int forbid_dac; -EXPORT_SYMBOL(forbid_dac); - int dma_supported(struct device *dev, u64 mask) { @@ -182,16 +179,6 @@ dma_supported(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_supported); - -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); - static int check_iommu(char *s) { if (!strcmp(s, "usedac")) { diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c index 6b204cc4289..7820675a688 100644 --- a/arch/x86/kernel/pci-dma_64.c +++ b/arch/x86/kernel/pci-dma_64.c @@ -161,8 +161,6 @@ void dma_free_coherent(struct device *dev, size_t size, } EXPORT_SYMBOL(dma_free_coherent); -static int forbid_dac __read_mostly; - int dma_supported(struct device *dev, u64 mask) { #ifdef CONFIG_PCI @@ -270,16 +268,3 @@ static __init int iommu_setup(char *p) return 0; } early_param("iommu", iommu_setup); - -#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 diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h index 914846d0bea..d82517de1e7 100644 --- a/include/asm-x86/dma-mapping.h +++ b/include/asm-x86/dma-mapping.h @@ -14,6 +14,7 @@ extern dma_addr_t bad_dma_address; extern int iommu_merge; extern struct device fallback_dev; extern int panic_on_overflow; +extern int forbid_dac; struct dma_mapping_ops { int (*mapping_error)(dma_addr_t dma_addr); @@ -223,6 +224,5 @@ dma_release_declared_memory(struct device *dev); extern void * dma_mark_declared_memory_occupied(struct device *dev, dma_addr_t device_addr, size_t size); -extern int forbid_dac; #endif /* CONFIG_X86_32 */ #endif |