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x86: unify pci iommu setup and allow swiotlb to compile for 32 bit

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swiotlb on 32 bit will be used by Xen domain 0 support.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge
2008-12-16 12:17:36 -08:00
committed by Ingo Molnar
parent 8ce7996009
commit cfb80c9eae
7 changed files with 14 additions and 5 deletions
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6
arch/x86/kernel/pci-dma.c
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@ -105,11 +105,15 @@ static void __init dma32_free_bootmem(void)
dma32_bootmem_ptr = NULL;
dma32_bootmem_size = 0;
}
#endif
void __init pci_iommu_alloc(void)
{
#ifdef CONFIG_X86_64
/* free the range so iommu could get some range less than 4G */
dma32_free_bootmem();
#endif
/*
* The order of these functions is important for
* fall-back/fail-over reasons
@ -125,8 +129,6 @@ void __init pci_iommu_alloc(void)
pci_swiotlb_init();
}
#endif
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag)
{