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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-01-05 14:36:12 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-06 13:06:50 (GMT) |
| commit | 4d9b977ca674dd40cfc1409a75cb73fca2cee423 (patch) | |
| tree | 417f80889ab49c61c2258b157cfe993bdf8d8357 /arch/ia64/kernel | |
| parent | c82e4417ace9a3a4dddf3332379c771c41040040 (diff) | |
| download | linux-fsl-qoriq-4d9b977ca674dd40cfc1409a75cb73fca2cee423.tar.xz | |
set up dma_ops appropriately
This patch introduces a global pointer, dma_ops, which points to an
appropriate dma_mapping_ops that the kernel should use. This is a
common way to handle multiple dma_mapping_ops (X86, POWER, and SPARC).
dma_ops is set in platform_dma_init. We also set it by hand where
machvec_init is callev via subsys_initcall.
- IA64_DIG_VTD uses vtd_dma_ops.
- IA64_HP_ZX1 uses sba_dma_ops.
- IA64_HP_ZX1_SWIOTLB uses hwsw_dma_ops.
- IA64_SGI_SN2 uses sn_dma_ops.
- The rest use swiotlb_dma_ops.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/dma-mapping.c | 4 | ||||
| -rw-r--r-- | arch/ia64/kernel/pci-dma.c | 6 | ||||
| -rw-r--r-- | arch/ia64/kernel/pci-swiotlb.c | 6 |
4 files changed, 14 insertions, 4 deletions
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile index bc1f62a..f2778f2 100644 --- a/arch/ia64/kernel/Makefile +++ b/arch/ia64/kernel/Makefile @@ -7,7 +7,7 @@ extra-y := head.o init_task.o vmlinux.lds obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \ irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \ salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \ - unwind.o mca.o mca_asm.o topology.o + unwind.o mca.o mca_asm.o topology.o dma-mapping.o obj-$(CONFIG_IA64_BRL_EMU) += brl_emu.o obj-$(CONFIG_IA64_GENERIC) += acpi-ext.o diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c new file mode 100644 index 0000000..876665a --- /dev/null +++ b/arch/ia64/kernel/dma-mapping.c @@ -0,0 +1,4 @@ +#include <linux/dma-mapping.h> + +struct dma_mapping_ops *dma_ops; +EXPORT_SYMBOL(dma_ops); diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c index f8c38bd..1c1224b 100644 --- a/arch/ia64/kernel/pci-dma.c +++ b/arch/ia64/kernel/pci-dma.c @@ -41,8 +41,11 @@ struct device fallback_dev = { .dma_mask = &fallback_dev.coherent_dma_mask, }; +extern struct dma_mapping_ops vtd_dma_ops; + void __init pci_iommu_alloc(void) { + dma_ops = &vtd_dma_ops; /* * The order of these functions is important for * fall-back/fail-over reasons @@ -76,9 +79,6 @@ iommu_dma_init(void) return; } -struct dma_mapping_ops *dma_ops; -EXPORT_SYMBOL(dma_ops); - int iommu_dma_supported(struct device *dev, u64 mask) { struct dma_mapping_ops *ops = get_dma_ops(dev); diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c index b62fb93..9f172c8 100644 --- a/arch/ia64/kernel/pci-swiotlb.c +++ b/arch/ia64/kernel/pci-swiotlb.c @@ -37,6 +37,12 @@ struct dma_mapping_ops swiotlb_dma_ops = { .mapping_error = swiotlb_dma_mapping_error, }; +void swiotlb_dma_init(void) +{ + dma_ops = &swiotlb_dma_ops; + swiotlb_init(); +} + void __init pci_swiotlb_init(void) { if (!iommu_detected) { |