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Date: Sat, 12 Sep 2020 11:21:56 +0800 From: Lu Baolu <baolu.lu@...ux.intel.com> To: Joerg Roedel <joro@...tes.org>, Tom Murphy <murphyt7@....ie>, David Woodhouse <dwmw2@...radead.org>, Christoph Hellwig <hch@...radead.org> Cc: Ashok Raj <ashok.raj@...el.com>, Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>, Intel-gfx@...ts.freedesktop.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, Lu Baolu <baolu.lu@...ux.intel.com> Subject: [PATCH v3 2/6] iommu: Add iommu_dma_free_cpu_cached_iovas() From: Tom Murphy <murphyt7@....ie> Add a iommu_dma_free_cpu_cached_iovas function to allow drivers which use the dma-iommu ops to free cached cpu iovas. Signed-off-by: Tom Murphy <murphyt7@....ie> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com> --- drivers/iommu/dma-iommu.c | 9 +++++++++ include/linux/dma-iommu.h | 8 ++++++++ 2 files changed, 17 insertions(+) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 82c071b2d5c8..d06411bd5e08 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -50,6 +50,15 @@ struct iommu_dma_cookie { struct iommu_domain *fq_domain; }; +void iommu_dma_free_cpu_cached_iovas(unsigned int cpu, + struct iommu_domain *domain) +{ + struct iommu_dma_cookie *cookie = domain->iova_cookie; + struct iova_domain *iovad = &cookie->iovad; + + free_cpu_cached_iovas(cpu, iovad); +} + static void iommu_dma_entry_dtor(unsigned long data) { struct page *freelist = (struct page *)data; diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h index 2112f21f73d8..706b68d1359b 100644 --- a/include/linux/dma-iommu.h +++ b/include/linux/dma-iommu.h @@ -37,6 +37,9 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc, void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); +void iommu_dma_free_cpu_cached_iovas(unsigned int cpu, + struct iommu_domain *domain); + #else /* CONFIG_IOMMU_DMA */ struct iommu_domain; @@ -78,5 +81,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he { } +static inline void iommu_dma_free_cpu_cached_iovas(unsigned int cpu, + struct iommu_domain *domain) +{ +} + #endif /* CONFIG_IOMMU_DMA */ #endif /* __DMA_IOMMU_H */ -- 2.17.1
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