Generalize 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 <pet...@redhat.com>
---
drivers/iommu/intel-iommu.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a64da83e867c..bf111e60857c 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1607,6 +1607,18 @@ 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;
@@ -3626,13 +3638,7 @@ 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;
@@ -3851,11 +3857,7 @@ 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;
}
--
2.14.3
