UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge git://git.infradead.org/~dwmw2/iommu-2.6.31 

* git://git.infradead.org/~dwmw2/iommu-2.6.31:
  intel-iommu: Fix enabling snooping feature by mistake
  intel-iommu: Mask physical address to correct page size in intel_map_single()
  intel-iommu: Correct sglist size calculation.
This commit is contained in:
Linus Torvalds 2009-08-07 10:44:11 -07:00
parent da758ddede c5b1525533
commit ff1649ff78
1 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/pci/intel-iommu.c
View File

@ -1505,7 +1505,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
}
set_bit(num, iommu->domain_ids);
set_bit(iommu->seq_id, &domain->iommu_bmp);
iommu->domains[num] = domain;
id = num;
}
@ -1648,6 +1647,14 @@ static int domain_context_mapped(struct pci_dev *pdev)
tmp->devfn);
}
/* Returns a number of VTD pages, but aligned to MM page size */
static inline unsigned long aligned_nrpages(unsigned long host_addr,
size_t size)
{
host_addr &= ~PAGE_MASK;
return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT;
}
static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
struct scatterlist *sg, unsigned long phys_pfn,
unsigned long nr_pages, int prot)
@ -1675,7 +1682,7 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
uint64_t tmp;
if (!sg_res) {
sg_res = (sg->offset + sg->length + VTD_PAGE_SIZE - 1) >> VTD_PAGE_SHIFT;
sg_res = aligned_nrpages(sg->offset, sg->length);
sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset;
sg->dma_length = sg->length;
pteval = page_to_phys(sg_page(sg)) | prot;
@ -2415,14 +2422,6 @@ error:
return ret;
}
/* Returns a number of VTD pages, but aligned to MM page size */
static inline unsigned long aligned_nrpages(unsigned long host_addr,
size_t size)
{
host_addr &= ~PAGE_MASK;
return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT;
}
/* This takes a number of _MM_ pages, not VTD pages */
static struct iova *intel_alloc_iova(struct device *dev,
struct dmar_domain *domain,
@ -2551,6 +2550,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
int prot = 0;
int ret;
struct intel_iommu *iommu;
unsigned long paddr_pfn = paddr >> PAGE_SHIFT;
BUG_ON(dir == DMA_NONE);
@ -2585,7 +2585,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
* is not a big problem
*/
ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo),
paddr >> VTD_PAGE_SHIFT, size, prot);
mm_to_dma_pfn(paddr_pfn), size, prot);
if (ret)
goto error;
@ -2875,7 +2875,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
start_vpfn = mm_to_dma_pfn(iova->pfn_lo);
ret = domain_sg_mapping(domain, start_vpfn, sglist, mm_to_dma_pfn(size), prot);
ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot);
if (unlikely(ret)) {
/* clear the page */
dma_pte_clear_range(domain, start_vpfn,
@ -3408,6 +3408,7 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
domain->iommu_count = 0;
domain->iommu_coherency = 0;
domain->iommu_snooping = 0;
domain->max_addr = 0;
/* always allocate the top pgd */