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intel-iommu: Make dma_pte_clear_range() take pfns as argument 

Noting that this is now an _inclusive_ range.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-06-27 22:09:11 +01:00
parent 04b18e65dd
commit 595badf5d6
1 changed files with 19 additions and 13 deletions
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32
drivers/pci/intel-iommu.c
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@ -56,6 +56,7 @@
#define MAX_AGAW_WIDTH 64
#define DOMAIN_MAX_ADDR(gaw) ((((u64)1) << gaw) - 1)
#define DOMAIN_MAX_PFN(gaw) ((((u64)1) << (gaw-VTD_PAGE_SHIFT)) - 1)
#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
#define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32))
@ -777,17 +778,17 @@ static void dma_pte_clear_one(struct dmar_domain *domain, unsigned long pfn)
}
/* clear last level pte, a tlb flush should be followed */
static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end)
static void dma_pte_clear_range(struct dmar_domain *domain,
unsigned long start_pfn,
unsigned long last_pfn)
{
unsigned long start_pfn = IOVA_PFN(start);
unsigned long end_pfn = IOVA_PFN(end-1);
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width);
BUG_ON(addr_width < BITS_PER_LONG && end_pfn >> addr_width);
BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width);
/* we don't need lock here; nobody else touches the iova range */
while (start_pfn <= end_pfn) {
while (start_pfn <= last_pfn) {
dma_pte_clear_one(domain, start_pfn);
start_pfn++;
}
@ -1424,7 +1425,7 @@ static void domain_exit(struct dmar_domain *domain)
end = end & (~PAGE_MASK);
/* clear ptes */
dma_pte_clear_range(domain, 0, end);
dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
/* free page tables */
dma_pte_free_pagetable(domain, 0, end);
@ -1890,7 +1891,8 @@ static int iommu_domain_identity_map(struct dmar_domain *domain,
* RMRR range might have overlap with physical memory range,
* clear it first
*/
dma_pte_clear_range(domain, base, base + size);
dma_pte_clear_range(domain, base >> VTD_PAGE_SHIFT,
(base + size - 1) >> VTD_PAGE_SHIFT);
return domain_page_mapping(domain, base, base, size,
DMA_PTE_READ|DMA_PTE_WRITE);
@ -2618,7 +2620,8 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
pci_name(pdev), size, (unsigned long long)start_addr);
/* clear the whole page */
dma_pte_clear_range(domain, start_addr, start_addr + size);
dma_pte_clear_range(domain, start_addr >> VTD_PAGE_SHIFT,
(start_addr + size - 1) >> VTD_PAGE_SHIFT);
/* free page tables */
dma_pte_free_pagetable(domain, start_addr, start_addr + size);
if (intel_iommu_strict) {
@ -2710,7 +2713,8 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
start_addr = iova->pfn_lo << PAGE_SHIFT;
/* clear the whole page */
dma_pte_clear_range(domain, start_addr, start_addr + size);
dma_pte_clear_range(domain, start_addr >> VTD_PAGE_SHIFT,
(start_addr + size - 1) >> VTD_PAGE_SHIFT);
/* free page tables */
dma_pte_free_pagetable(domain, start_addr, start_addr + size);
@ -2792,8 +2796,9 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
size, prot);
if (ret) {
/* clear the page */
dma_pte_clear_range(domain, start_addr,
start_addr + offset);
dma_pte_clear_range(domain,
start_addr >> VTD_PAGE_SHIFT,
(start_addr + offset - 1) >> VTD_PAGE_SHIFT);
/* free page tables */
dma_pte_free_pagetable(domain, start_addr,
start_addr + offset);
@ -3382,7 +3387,7 @@ static void vm_domain_exit(struct dmar_domain *domain)
end = end & (~VTD_PAGE_MASK);
/* clear ptes */
dma_pte_clear_range(domain, 0, end);
dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
/* free page tables */
dma_pte_free_pagetable(domain, 0, end);
@ -3526,7 +3531,8 @@ static void intel_iommu_unmap_range(struct iommu_domain *domain,
/* The address might not be aligned */
base = iova & VTD_PAGE_MASK;
size = VTD_PAGE_ALIGN(size);
dma_pte_clear_range(dmar_domain, base, base + size);
dma_pte_clear_range(dmar_domain, base >> VTD_PAGE_SHIFT,
(base + size - 1) >> VTD_PAGE_SHIFT);
if (dmar_domain->max_addr == base + size)
dmar_domain->max_addr = base;