diff options
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6aacfa4..63b8c02 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -459,6 +459,7 @@ static void flush_unmaps_timeout(unsigned long data); struct deferred_flush_entry { struct iova *iova; + unsigned long nrpages; struct dmar_domain *domain; struct page *freelist; }; @@ -3542,6 +3543,7 @@ static void flush_unmaps(struct deferred_flush_data *flush_data) struct deferred_flush_entry *entry = &flush_table->entries[j]; struct iova *iova = entry->iova; + unsigned long nrpages = entry->nrpages; struct dmar_domain *domain = entry->domain; struct page *freelist = entry->freelist; @@ -3549,10 +3551,9 @@ static void flush_unmaps(struct deferred_flush_data *flush_data) if (cap_caching_mode(iommu->cap)) iommu_flush_iotlb_psi(iommu, domain, mm_to_dma_pfn(iova->pfn_lo), - mm_to_dma_pfn(iova_size(iova)), - !freelist, 0); + nrpages, !freelist, 0); else { - mask = ilog2(mm_to_dma_pfn(iova_size(iova))); + mask = ilog2(nrpages); iommu_flush_dev_iotlb(domain, (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); } @@ -3576,7 +3577,8 @@ static void flush_unmaps_timeout(unsigned long cpuid) spin_unlock_irqrestore(&flush_data->lock, flags); } -static void add_unmap(struct dmar_domain *dom, struct iova *iova, struct page *freelist) +static void add_unmap(struct dmar_domain *dom, struct iova *iova, + unsigned long nrpages, struct page *freelist) { unsigned long flags; int entry_id, iommu_id; @@ -3610,6 +3612,7 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova, struct page *f entry = &flush_data->tables[iommu_id].entries[entry_id]; entry->domain = dom; entry->iova = iova; + entry->nrpages = nrpages; entry->freelist = freelist; if (!flush_data->timer_on) { @@ -3622,10 +3625,11 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova, struct page *f put_cpu(); } -static void intel_unmap(struct device *dev, dma_addr_t dev_addr) +static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) { struct dmar_domain *domain; unsigned long start_pfn, last_pfn; + unsigned long nrpages; struct iova *iova; struct intel_iommu *iommu; struct page *freelist; @@ -3643,8 +3647,9 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr) (unsigned long long)dev_addr)) return; + nrpages = aligned_nrpages(dev_addr, size); start_pfn = mm_to_dma_pfn(iova->pfn_lo); - last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; + last_pfn = start_pfn + nrpages - 1; pr_debug("Device %s unmapping: pfn %lx-%lx\n", dev_name(dev), start_pfn, last_pfn); @@ -3653,12 +3658,12 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr) if (intel_iommu_strict) { iommu_flush_iotlb_psi(iommu, domain, start_pfn, - last_pfn - start_pfn + 1, !freelist, 0); + nrpages, !freelist, 0); /* free iova */ __free_iova(&domain->iovad, iova); dma_free_pagelist(freelist); } else { - add_unmap(domain, iova, freelist); + add_unmap(domain, iova, nrpages, freelist); /* * queue up the release of the unmap to save the 1/6th of the * cpu used up by the iotlb flush operation... @@ -3670,7 +3675,7 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - intel_unmap(dev, dev_addr); + intel_unmap(dev, dev_addr, size); } static void *intel_alloc_coherent(struct device *dev, size_t size, @@ -3729,7 +3734,7 @@ static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, size = PAGE_ALIGN(size); order = get_order(size); - intel_unmap(dev, dma_handle); + intel_unmap(dev, dma_handle, size); if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) __free_pages(page, order); } @@ -3738,7 +3743,16 @@ static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction dir, struct dma_attrs *attrs) { - intel_unmap(dev, sglist[0].dma_address); + dma_addr_t startaddr = sg_dma_address(sglist) & PAGE_MASK; + unsigned long nrpages = 0; + struct scatterlist *sg; + int i; + + for_each_sg(sglist, sg, nelems, i) { + nrpages += aligned_nrpages(sg_dma_address(sg), sg_dma_len(sg)); + } + + intel_unmap(dev, startaddr, nrpages << VTD_PAGE_SHIFT); } static int intel_nontranslate_map_sg(struct device *hddev, |