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iommu/core: stop converting bytes to page order back and forth

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Express sizes in bytes rather than in page order, to eliminate the
size->order->size conversions we have whenever the IOMMU API is calling
the low level drivers' map/unmap methods.

Adopt all existing drivers.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <Joerg.Roedel@amd.com>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Cc: KyongHo Cho <pullip.cho@samsung.com>
Cc: Hiroshi DOYU <hdoyu@nvidia.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Ohad Ben-Cohen
2011-11-10 11:32:25 +02:00
committed by Joerg Roedel
parent 1ea6b8f489
commit 5009065d38
6 changed files with 29 additions and 42 deletions
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11
drivers/iommu/intel-iommu.c
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@@ -3979,12 +3979,11 @@ static void intel_iommu_detach_device(struct iommu_domain *domain,
static int intel_iommu_map(struct iommu_domain *domain,
unsigned long iova, phys_addr_t hpa,
int gfp_order, int iommu_prot)
size_t size, int iommu_prot)
{
struct dmar_domain *dmar_domain = domain->priv;
u64 max_addr;
int prot = 0;
size_t size;
int ret;
if (iommu_prot & IOMMU_READ)
@@ -3994,7 +3993,6 @@ static int intel_iommu_map(struct iommu_domain *domain,
if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping)
prot |= DMA_PTE_SNP;
size = PAGE_SIZE << gfp_order;
max_addr = iova + size;
if (dmar_domain->max_addr < max_addr) {
u64 end;
@@ -4017,11 +4015,10 @@ static int intel_iommu_map(struct iommu_domain *domain,
return ret;
}
static int intel_iommu_unmap(struct iommu_domain *domain,
unsigned long iova, int gfp_order)
static size_t intel_iommu_unmap(struct iommu_domain *domain,
unsigned long iova, size_t size)
{
struct dmar_domain *dmar_domain = domain->priv;
size_t size = PAGE_SIZE << gfp_order;
int order;
order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT,
@@ -4030,7 +4027,7 @@ static int intel_iommu_unmap(struct iommu_domain *domain,
if (dmar_domain->max_addr == iova + size)
dmar_domain->max_addr = iova;
return order;
return PAGE_SIZE << order;
}
static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,