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

With some cleanup of intel_unmap_page(), intel_unmap_sg() and
vm_domain_exit() to no longer play with 64-bit addresses.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-06-28 00:27:49 +01:00
parent 6660c63a79
commit d794dc9b30
1 changed files with 29 additions and 41 deletions
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70
drivers/pci/intel-iommu.c
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@ -796,11 +796,10 @@ static void dma_pte_clear_range(struct dmar_domain *domain,
/* free page table pages. last level pte should already be cleared */
static void dma_pte_free_pagetable(struct dmar_domain *domain,
u64 start, u64 end)
unsigned long start_pfn,
unsigned long last_pfn)
{
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
unsigned long start_pfn = start >> VTD_PAGE_SHIFT;
unsigned long last_pfn = (end-1) >> VTD_PAGE_SHIFT;
struct dma_pte *pte;
int total = agaw_to_level(domain->agaw);
int level;
@ -832,7 +831,7 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
level++;
}
/* free pgd */
if (start == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) {
if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) {
free_pgtable_page(domain->pgd);
domain->pgd = NULL;
}
@ -1416,7 +1415,6 @@ static void domain_exit(struct dmar_domain *domain)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
u64 end;
/* Domain 0 is reserved, so dont process it */
if (!domain)
@ -1425,14 +1423,12 @@ static void domain_exit(struct dmar_domain *domain)
domain_remove_dev_info(domain);
/* destroy iovas */
put_iova_domain(&domain->iovad);
end = DOMAIN_MAX_ADDR(domain->gaw);
end = end & (~PAGE_MASK);
/* clear ptes */
dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
/* free page tables */
dma_pte_free_pagetable(domain, 0, end);
dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
for_each_active_iommu(iommu, drhd)
if (test_bit(iommu->seq_id, &domain->iommu_bmp))
@ -2601,7 +2597,7 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dmar_domain *domain;
unsigned long start_addr;
unsigned long start_pfn, last_pfn;
struct iova *iova;
struct intel_iommu *iommu;
@ -2617,20 +2613,22 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
if (!iova)
return;
start_addr = iova->pfn_lo << PAGE_SHIFT;
size = aligned_size((u64)dev_addr, size);
start_pfn = mm_to_dma_pfn(iova->pfn_lo);
last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1;
pr_debug("Device %s unmapping: %zx@%llx\n",
pci_name(pdev), size, (unsigned long long)start_addr);
pr_debug("Device %s unmapping: pfn %lx-%lx\n",
pci_name(pdev), start_pfn, last_pfn);
/* clear the whole page */
dma_pte_clear_range(domain, start_addr >> VTD_PAGE_SHIFT,
(start_addr + size - 1) >> VTD_PAGE_SHIFT);
dma_pte_clear_range(domain, start_pfn, last_pfn);
/* free page tables */
dma_pte_free_pagetable(domain, start_addr, start_addr + size);
dma_pte_free_pagetable(domain, start_pfn, last_pfn);
if (intel_iommu_strict) {
iommu_flush_iotlb_psi(iommu, domain->id, start_addr,
size >> VTD_PAGE_SHIFT);
iommu_flush_iotlb_psi(iommu, domain->id,
start_pfn << VTD_PAGE_SHIFT,
last_pfn - start_pfn + 1);
/* free iova */
__free_iova(&domain->iovad, iova);
} else {
@ -2688,14 +2686,10 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
int nelems, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
int i;
struct pci_dev *pdev = to_pci_dev(hwdev);
struct dmar_domain *domain;
unsigned long start_addr;
unsigned long start_pfn, last_pfn;
struct iova *iova;
size_t size = 0;
phys_addr_t addr;
struct scatterlist *sg;
struct intel_iommu *iommu;
if (iommu_no_mapping(pdev))
@ -2709,21 +2703,19 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
iova = find_iova(&domain->iovad, IOVA_PFN(sglist[0].dma_address));
if (!iova)
return;
for_each_sg(sglist, sg, nelems, i) {
addr = page_to_phys(sg_page(sg)) + sg->offset;
size += aligned_size((u64)addr, sg->length);
}
start_addr = iova->pfn_lo << PAGE_SHIFT;
start_pfn = mm_to_dma_pfn(iova->pfn_lo);
last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1;
/* clear the whole page */
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);
dma_pte_clear_range(domain, start_pfn, last_pfn);
iommu_flush_iotlb_psi(iommu, domain->id, start_addr,
size >> VTD_PAGE_SHIFT);
/* free page tables */
dma_pte_free_pagetable(domain, start_pfn, last_pfn);
iommu_flush_iotlb_psi(iommu, domain->id,
start_pfn << VTD_PAGE_SHIFT,
(last_pfn - start_pfn + 1));
/* free iova */
__free_iova(&domain->iovad, iova);
@ -2804,8 +2796,8 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
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);
dma_pte_free_pagetable(domain, start_addr >> VTD_PAGE_SHIFT,
(start_addr + offset - 1) >> VTD_PAGE_SHIFT);
/* free iova */
__free_iova(&domain->iovad, iova);
return 0;
@ -3378,8 +3370,6 @@ static void iommu_free_vm_domain(struct dmar_domain *domain)
static void vm_domain_exit(struct dmar_domain *domain)
{
u64 end;
/* Domain 0 is reserved, so dont process it */
if (!domain)
return;
@ -3387,14 +3377,12 @@ static void vm_domain_exit(struct dmar_domain *domain)
vm_domain_remove_all_dev_info(domain);
/* destroy iovas */
put_iova_domain(&domain->iovad);
end = DOMAIN_MAX_ADDR(domain->gaw);
end = end & (~VTD_PAGE_MASK);
/* clear ptes */
dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
/* free page tables */
dma_pte_free_pagetable(domain, 0, end);
dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw));
iommu_free_vm_domain(domain);
free_domain_mem(domain);