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Commit fad25926 authored by Mitchel Humpherys's avatar Mitchel Humpherys Committed by Patrick Daly
Browse files

iommu: export iommu_pgsize 



It can be useful in IOMMU drivers.  Export it.

Change-Id: I4c423d256312250f1e33ca8d64dfe1626f008b5e
Signed-off-by: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent ff8e21c9

drivers/iommu/iommu.c

+7 −5
Original line number Diff line number Diff line
@@ -1275,7 +1275,7 @@ phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, 
	return domain->ops->iova_to_phys_hard(domain, iova);

}



static size_t iommu_pgsize(struct iommu_domain *domain,

size_t iommu_pgsize(unsigned long pgsize_bitmap,

		    unsigned long addr_merge, size_t size)

{

	unsigned int pgsize_idx;
@@ -1295,7 +1295,7 @@ static size_t iommu_pgsize(struct iommu_domain *domain, 
	pgsize = (1UL << (pgsize_idx + 1)) - 1;



	/* throw away page sizes not supported by the hardware */

	pgsize &= domain->pgsize_bitmap;

	pgsize &= pgsize_bitmap;



	/* make sure we're still sane */

	BUG_ON(!pgsize);
@@ -1340,7 +1340,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, 
	pr_debug("map: iova 0x%lx pa %pa size 0x%zx\n", iova, &paddr, size);



	while (size) {

		size_t pgsize = iommu_pgsize(domain, iova | paddr, size);

		size_t pgsize = iommu_pgsize(domain->pgsize_bitmap,

						iova | paddr, size);



		pr_debug("mapping: iova 0x%lx pa %pa pgsize 0x%zx\n",

			 iova, &paddr, pgsize);
@@ -1398,7 +1399,8 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) 
	 * or we hit an area that isn't mapped.

	 */

	while (unmapped < size) {

		size_t pgsize = iommu_pgsize(domain, iova, size - unmapped);

		size_t pgsize = iommu_pgsize(domain->pgsize_bitmap,

						iova, size - unmapped);



		unmapped_page = domain->ops->unmap(domain, iova, pgsize);

		if (!unmapped_page)

include/linux/iommu.h

+2 −0
Original line number Diff line number Diff line
@@ -245,6 +245,8 @@ extern int iommu_attach_device(struct iommu_domain *domain, 
extern void iommu_detach_device(struct iommu_domain *domain,

				struct device *dev);

extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);

extern size_t iommu_pgsize(unsigned long pgsize_bitmap,

			   unsigned long addr_merge, size_t size);

extern int iommu_map(struct iommu_domain *domain, unsigned long iova,

		     phys_addr_t paddr, size_t size, int prot);

extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,