diff options
| author | Glauber Costa <gcosta@redhat.com> | 2008-04-08 13:20:53 -0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:19:57 +0200 |
| commit | bca5c09663030bdd18ab1b3ccb6671f663c3345a (patch) | |
| tree | a98960da8eb60964dda190e6df6ef890c64147eb /arch/x86/kernel/pci-dma.c | |
| parent | 116890d556af38d539597655c564a73e6eef3d9e (diff) | |
x86: move pci fixup to pci-dma.c
via_no_dac provides a fixup that is the same for both
architectures. Move it to pci-dma.c.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 91443361cb67..48cccbe51aa5 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 |