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Commit 468e2366 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Implement ->{un}map callbacks for iommu-api 



This patch implements the new callbacks for the IOMMU-API
with functions that can handle different page sizes in the
IOMMU page table.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent f03152bb

arch/x86/kernel/amd_iommu.c

+29 −0
Original line number Diff line number Diff line
@@ -2552,6 +2552,33 @@ static void amd_iommu_unmap_range(struct iommu_domain *dom, 
	iommu_flush_tlb_pde(domain);

}



static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,

			 phys_addr_t paddr, int gfp_order, int iommu_prot)

{

	unsigned long page_size = 0x1000UL << gfp_order;

	struct protection_domain *domain = dom->priv;

	int prot = 0;



	if (iommu_prot & IOMMU_READ)

		prot |= IOMMU_PROT_IR;

	if (iommu_prot & IOMMU_WRITE)

		prot |= IOMMU_PROT_IW;



	return iommu_map_page(domain, iova, paddr, prot, page_size);

}



static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,

			   int gfp_order)

{

	struct protection_domain *domain = dom->priv;

	unsigned long page_size, unmap_size;



	page_size  = 0x1000UL << gfp_order;

	unmap_size = iommu_unmap_page(domain, iova, page_size);



	return get_order(unmap_size);

}



static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,

					  unsigned long iova)

{
@@ -2587,6 +2614,8 @@ static struct iommu_ops amd_iommu_ops = { 
	.domain_destroy = amd_iommu_domain_destroy,

	.attach_dev = amd_iommu_attach_device,

	.detach_dev = amd_iommu_detach_device,

	.map = amd_iommu_map,

	.unmap = amd_iommu_unmap,

	.map_range = amd_iommu_map_range,

	.unmap_range = amd_iommu_unmap_range,

	.iova_to_phys = amd_iommu_iova_to_phys,