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 TWgC02on 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Since we're touching this code, it might be a good opportunity to fix the old typo > + * dma_iova_link - Link a range of IOVA space > + * @dev: DMA device > + * @state: IOVA state > + * @phys: physical address to link > + * @offset: offset into the IOVA state to map into > + * @size: size of the buffer > + * @dir: DMA direction > + * @attrs: attributes of mapping properties > + * > + * Link a range of IOVA space for the given IOVA state without IOTLB sync. > + * This function is used to link multiple physical addresses in contigueous old typo contigueous -> contiguous > + * IOVA space without performing costly IOTLB sync. > + * > + * The caller is responsible to call to dma_iova_sync() to sync IOTLB at > + * the end of linkage. > + */ > +int dma_iova_link(struct device *dev, struct dma_iova_state *state, > + phys_addr_t phys, size_t offset, size_t size, > + enum dma_data_direction dir, unsigned long attrs) > +{ > + struct iommu_domain *domain = iommu_get_dma_domain(dev); > + struct iommu_dma_cookie *cookie = domain->iova_cookie; > + struct iova_domain *iovad = &cookie->iovad; > + size_t iova_start_pad = iova_offset(iovad, phys); > + > + if (WARN_ON_ONCE(iova_start_pad && offset > 0)) > + return -EIO; > + > + if (dev_use_swiotlb(dev, size, dir) && iova_offset(iovad, phys | size)) > + return iommu_dma_iova_link_swiotlb(dev, state, phys, offset, > + size, dir, attrs); > + > + return __dma_iova_link(dev, state->addr + offset - iova_start_pad, > + phys - iova_start_pad, > + iova_align(iovad, size + iova_start_pad), dir, attrs); > +} > +EXPORT_SYMBOL_GPL(dma_iova_link); > + > +/** > + * dma_iova_sync - Sync IOTLB > + * @dev: DMA device > + * @state: IOVA state > + * @offset: offset into the IOVA state to sync > + * @size: size of the buffer > + * > + * Sync IOTLB for the given IOVA state. This function should be called on > + * the IOVA-contigous range created by one ore more dma_iova_link() calls old typo IOVA-contigous -> IOVA-contiguous > + * to sync the IOTLB. > + */ > +int dma_iova_sync(struct device *dev, struct dma_iova_state *state, > + size_t offset, size_t size) > +{ > + struct iommu_domain *domain = iommu_get_dma_domain(dev); > + struct iommu_dma_cookie *cookie = domain->iova_cookie; > + struct iova_domain *iovad = &cookie->iovad; > + dma_addr_t addr = state->addr + offset; > + size_t iova_start_pad = iova_offset(iovad, addr); > + > + return iommu_sync_map(domain, addr - iova_start_pad, > + iova_align(iovad, size + iova_start_pad)); > +} Thanks, Alok