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Message-Id: <20180418044130.12339-3-peterx@redhat.com> Date: Wed, 18 Apr 2018 12:41:29 +0800 From: Peter Xu <peterx@...hat.com> To: linux-kernel@...r.kernel.org Cc: Alex Williamson <alex.williamson@...hat.com>, Joerg Roedel <joro@...tes.org>, David Woodhouse <dwmw2@...radead.org>, peterx@...hat.com Subject: [PATCH 2/3] intel-iommu: generalize __mapping_notify_one() 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 <peterx@...hat.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
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