diff options
| author | Peter Xu <peterx@redhat.com> | 2018-05-04 10:34:52 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-05-15 16:31:41 +0200 |
| commit | eed91a0b85e55bcda8849d191604537b9933594f (patch) | |
| tree | 22b76575895a709732ac501e611538692937664b /drivers/iommu | |
| parent | 6c50d79f66382d78918a768374839d6d1b606d3f (diff) | |
iommu/vt-d: Introduce __mapping_notify_one()
Introduce this new helper to notify one newly created mapping on one
single IOMMU. We can further leverage this helper in the next patch.
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 749d8f235346..13190a54aba2 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1606,6 +1606,18 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, iommu_flush_dev_iotlb(domain, addr, mask); } +/* Notification for newly created mappings */ +static inline void __mapping_notify_one(struct intel_iommu *iommu, + struct dmar_domain *domain, + unsigned long pfn, unsigned int pages) +{ + /* It's a non-present to present mapping. Only flush if caching mode */ + if (cap_caching_mode(iommu->cap)) + iommu_flush_iotlb_psi(iommu, domain, pfn, pages, 0, 1); + else + iommu_flush_write_buffer(iommu); +} + static void iommu_flush_iova(struct iova_domain *iovad) { struct dmar_domain *domain; @@ -3625,13 +3637,7 @@ static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr, if (ret) goto error; - /* it's a non-present to present mapping. Only flush if caching mode */ - if (cap_caching_mode(iommu->cap)) - iommu_flush_iotlb_psi(iommu, domain, - mm_to_dma_pfn(iova_pfn), - size, 0, 1); - else - iommu_flush_write_buffer(iommu); + __mapping_notify_one(iommu, domain, mm_to_dma_pfn(iova_pfn), size); start_paddr = (phys_addr_t)iova_pfn << PAGE_SHIFT; start_paddr += paddr & ~PAGE_MASK; @@ -3819,11 +3825,7 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele return 0; } - /* it's a non-present to present mapping. Only flush if caching mode */ - if (cap_caching_mode(iommu->cap)) - iommu_flush_iotlb_psi(iommu, domain, start_vpfn, size, 0, 1); - else - iommu_flush_write_buffer(iommu); + __mapping_notify_one(iommu, domain, start_vpfn, size); return nelems; } |