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intel-iommu: use coherent_dma_mask in alloc_coherent

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This patch fixes intel-iommu to use dev->coherent_dma_mask in
alloc_coherent. Currently, intel-iommu uses dev->dma_mask in
alloc_coherent but alloc_coherent is supposed to use
coherent_dma_mask. It could break drivers that uses smaller
coherent_dma_mask than dma_mask (though the current code works for the
majority that use the same mask for coherent_dma_mask and dma_mask).

[dwmw2: dma_mask can be bigger than 'unsigned long']
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
FUJITA Tomonori 2008-10-15 16:08:28 +09:00 committed by David Woodhouse
parent f609891f42
commit bb9e6d6507
1 changed files with 19 additions and 10 deletions
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29
drivers/pci/intel-iommu.c
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@ -1762,14 +1762,14 @@ iommu_alloc_iova(struct dmar_domain *domain, size_t size, u64 end)
static struct iova *
__intel_alloc_iova(struct device *dev, struct dmar_domain *domain,
size_t size)
size_t size, u64 dma_mask)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct iova *iova = NULL;
if ((pdev->dma_mask <= DMA_32BIT_MASK) || (dmar_forcedac)) {
iova = iommu_alloc_iova(domain, size, pdev->dma_mask);
} else {
if (dma_mask <= DMA_32BIT_MASK || dmar_forcedac)
iova = iommu_alloc_iova(domain, size, dma_mask);
else {
/*
* First try to allocate an io virtual address in
* DMA_32BIT_MASK and if that fails then try allocating
@ -1777,7 +1777,7 @@ __intel_alloc_iova(struct device *dev, struct dmar_domain *domain,
*/
iova = iommu_alloc_iova(domain, size, DMA_32BIT_MASK);
if (!iova)
iova = iommu_alloc_iova(domain, size, pdev->dma_mask);
iova = iommu_alloc_iova(domain, size, dma_mask);
}
if (!iova) {
@ -1816,8 +1816,8 @@ get_valid_domain_for_dev(struct pci_dev *pdev)
return domain;
}
dma_addr_t
intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
size_t size, int dir, u64 dma_mask)
{
struct pci_dev *pdev = to_pci_dev(hwdev);
struct dmar_domain *domain;
@ -1836,7 +1836,7 @@ intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
size = aligned_size((u64)paddr, size);
iova = __intel_alloc_iova(hwdev, domain, size);
iova = __intel_alloc_iova(hwdev, domain, size, pdev->dma_mask);
if (!iova)
goto error;
@ -1878,6 +1878,13 @@ error:
return 0;
}
dma_addr_t intel_map_single(struct device *hwdev, phys_addr_t paddr,
size_t size, int dir)
{
return __intel_map_single(hwdev, paddr, size, dir,
to_pci_dev(hwdev)->dma_mask);
}
static void flush_unmaps(void)
{
int i, j;
@ -1993,7 +2000,9 @@ void *intel_alloc_coherent(struct device *hwdev, size_t size,
return NULL;
memset(vaddr, 0, size);
*dma_handle = intel_map_single(hwdev, virt_to_bus(vaddr), size, DMA_BIDIRECTIONAL);
*dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size,
DMA_BIDIRECTIONAL,
hwdev->coherent_dma_mask);
if (*dma_handle)
return vaddr;
free_pages((unsigned long)vaddr, order);
@ -2097,7 +2106,7 @@ int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems,
size += aligned_size((u64)addr, sg->length);
}
iova = __intel_alloc_iova(hwdev, domain, size);
iova = __intel_alloc_iova(hwdev, domain, size, pdev->dma_mask);
if (!iova) {
sglist->dma_length = 0;
return 0;