diff options
| -rw-r--r-- | arch/x86_64/kernel/pci-dma.c | 5 | ||||
| -rw-r--r-- | arch/x86_64/kernel/pci-gart.c | 20 | ||||
| -rw-r--r-- | arch/x86_64/kernel/reboot.c | 4 | ||||
| -rw-r--r-- | include/asm-x86_64/proto.h | 7 |
4 files changed, 36 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c index 90f6315d02d..be8dce40f65 100644 --- a/arch/x86_64/kernel/pci-dma.c +++ b/arch/x86_64/kernel/pci-dma.c @@ -321,6 +321,11 @@ 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 */ diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c index e587b65e754..12acafdca79 100644 --- a/arch/x86_64/kernel/pci-gart.c +++ b/arch/x86_64/kernel/pci-gart.c @@ -571,6 +571,26 @@ static const struct dma_mapping_ops gart_dma_ops = { .unmap_sg = gart_unmap_sg, }; +void gart_iommu_shutdown(void) +{ + struct pci_dev *dev; + int i; + + if (no_agp && (dma_ops != &gart_dma_ops)) + return; + + for (i = 0; i < num_k8_northbridges; i++) { + u32 ctl; + + dev = k8_northbridges[i]; + pci_read_config_dword(dev, 0x90, &ctl); + + ctl &= ~1; + + pci_write_config_dword(dev, 0x90, ctl); + } +} + void __init gart_iommu_init(void) { struct agp_kern_info info; diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c index 7503068e788..e6e65c2c63e 100644 --- a/arch/x86_64/kernel/reboot.c +++ b/arch/x86_64/kernel/reboot.c @@ -16,6 +16,7 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/apic.h> +#include <asm/proto.h> /* * Power off function, if any @@ -81,6 +82,7 @@ static inline void kb_wait(void) void machine_shutdown(void) { unsigned long flags; + /* Stop the cpus and apics */ #ifdef CONFIG_SMP int reboot_cpu_id; @@ -111,6 +113,8 @@ void machine_shutdown(void) disable_IO_APIC(); local_irq_restore(flags); + + pci_iommu_shutdown(); } void machine_emergency_restart(void) diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h index 85255db1e82..b70aa0ccbe2 100644 --- a/include/asm-x86_64/proto.h +++ b/include/asm-x86_64/proto.h @@ -85,11 +85,13 @@ extern int exception_trace; extern unsigned cpu_khz; extern unsigned tsc_khz; +extern void pci_iommu_shutdown(void); extern void no_iommu_init(void); extern int force_iommu, no_iommu; extern int iommu_detected; #ifdef CONFIG_IOMMU extern void gart_iommu_init(void); +extern void gart_iommu_shutdown(void); extern void __init gart_parse_options(char *); extern void iommu_hole_init(void); extern int fallback_aper_order; @@ -101,6 +103,11 @@ extern int fix_aperture; #else #define iommu_aperture 0 #define iommu_aperture_allowed 0 + +static inline void gart_iommu_shutdown(void) +{ +} + #endif extern int reboot_force; |