From 80808d273a3f075196d1a26463f65d4c9d2891c8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 1 Mar 2021 08:44:26 +0100 Subject: [PATCH] swiotlb: split swiotlb_tbl_sync_single Split swiotlb_tbl_sync_single into two separate funtions for the to device and to cpu synchronization. Signed-off-by: Christoph Hellwig Signed-off-by: Konrad Rzeszutek Wilk --- drivers/iommu/dma-iommu.c | 12 ++++++------ drivers/xen/swiotlb-xen.c | 4 ++-- include/linux/swiotlb.h | 17 ++++------------- kernel/dma/direct.c | 8 ++++---- kernel/dma/direct.h | 4 ++-- kernel/dma/swiotlb.c | 34 +++++++++++++++------------------- 6 files changed, 33 insertions(+), 46 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 9149597410e2..3087d9fa6065 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -750,7 +750,7 @@ static void iommu_dma_sync_single_for_cpu(struct device *dev, arch_sync_dma_for_cpu(phys, size, dir); if (is_swiotlb_buffer(phys)) - swiotlb_tbl_sync_single(dev, phys, size, dir, SYNC_FOR_CPU); + swiotlb_sync_single_for_cpu(dev, phys, size, dir); } static void iommu_dma_sync_single_for_device(struct device *dev, @@ -763,7 +763,7 @@ static void iommu_dma_sync_single_for_device(struct device *dev, phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dma_handle); if (is_swiotlb_buffer(phys)) - swiotlb_tbl_sync_single(dev, phys, size, dir, SYNC_FOR_DEVICE); + swiotlb_sync_single_for_device(dev, phys, size, dir); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(phys, size, dir); @@ -784,8 +784,8 @@ static void iommu_dma_sync_sg_for_cpu(struct device *dev, arch_sync_dma_for_cpu(sg_phys(sg), sg->length, dir); if (is_swiotlb_buffer(sg_phys(sg))) - swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length, - dir, SYNC_FOR_CPU); + swiotlb_sync_single_for_cpu(dev, sg_phys(sg), + sg->length, dir); } } @@ -801,8 +801,8 @@ static void iommu_dma_sync_sg_for_device(struct device *dev, for_each_sg(sgl, sg, nelems, i) { if (is_swiotlb_buffer(sg_phys(sg))) - swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length, - dir, SYNC_FOR_DEVICE); + swiotlb_sync_single_for_device(dev, sg_phys(sg), + sg->length, dir); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(sg_phys(sg), sg->length, dir); diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index d47f1b311caa..4e8a4e14942a 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -462,7 +462,7 @@ xen_swiotlb_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr, } if (is_xen_swiotlb_buffer(dev, dma_addr)) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); + swiotlb_sync_single_for_cpu(dev, paddr, size, dir); } static void @@ -472,7 +472,7 @@ xen_swiotlb_sync_single_for_device(struct device *dev, dma_addr_t dma_addr, phys_addr_t paddr = xen_dma_to_phys(dev, dma_addr); if (is_xen_swiotlb_buffer(dev, dma_addr)) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE); + swiotlb_sync_single_for_device(dev, paddr, size, dir); if (!dev_is_dma_coherent(dev)) { if (pfn_valid(PFN_DOWN(dma_to_phys(dev, dma_addr)))) diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 59f421d041ed..0696bdc8072e 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -42,14 +42,6 @@ extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); extern int swiotlb_late_init_with_default_size(size_t default_size); extern void __init swiotlb_update_mem_attributes(void); -/* - * Enumeration for sync targets - */ -enum dma_sync_target { - SYNC_FOR_CPU = 0, - SYNC_FOR_DEVICE = 1, -}; - phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys, size_t mapping_size, size_t alloc_size, enum dma_data_direction dir, unsigned long attrs); @@ -60,11 +52,10 @@ extern void swiotlb_tbl_unmap_single(struct device *hwdev, enum dma_data_direction dir, unsigned long attrs); -extern void swiotlb_tbl_sync_single(struct device *hwdev, - phys_addr_t tlb_addr, - size_t size, enum dma_data_direction dir, - enum dma_sync_target target); - +void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir); +void swiotlb_sync_single_for_cpu(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir); dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys, size_t size, enum dma_data_direction dir, unsigned long attrs); diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 002268262c9a..f737e3347059 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -344,8 +344,8 @@ void dma_direct_sync_sg_for_device(struct device *dev, phys_addr_t paddr = dma_to_phys(dev, sg_dma_address(sg)); if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, sg->length, - dir, SYNC_FOR_DEVICE); + swiotlb_sync_single_for_device(dev, paddr, sg->length, + dir); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(paddr, sg->length, @@ -370,8 +370,8 @@ void dma_direct_sync_sg_for_cpu(struct device *dev, arch_sync_dma_for_cpu(paddr, sg->length, dir); if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, sg->length, dir, - SYNC_FOR_CPU); + swiotlb_sync_single_for_cpu(dev, paddr, sg->length, + dir); if (dir == DMA_FROM_DEVICE) arch_dma_mark_clean(paddr, sg->length); diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h index e1bf721591c0..50afc05b6f1d 100644 --- a/kernel/dma/direct.h +++ b/kernel/dma/direct.h @@ -57,7 +57,7 @@ static inline void dma_direct_sync_single_for_device(struct device *dev, phys_addr_t paddr = dma_to_phys(dev, addr); if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE); + swiotlb_sync_single_for_device(dev, paddr, size, dir); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(paddr, size, dir); @@ -74,7 +74,7 @@ static inline void dma_direct_sync_single_for_cpu(struct device *dev, } if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); + swiotlb_sync_single_for_cpu(dev, paddr, size, dir); if (dir == DMA_FROM_DEVICE) arch_dma_mark_clean(paddr, size); diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index a431c6b64e82..5fe8781be6f2 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -715,26 +715,22 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, spin_unlock_irqrestore(&io_tlb_lock, flags); } -void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr, - size_t size, enum dma_data_direction dir, - enum dma_sync_target target) +void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir) { - switch (target) { - case SYNC_FOR_CPU: - if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) - swiotlb_bounce(hwdev, tlb_addr, size, DMA_FROM_DEVICE); - else - BUG_ON(dir != DMA_TO_DEVICE); - break; - case SYNC_FOR_DEVICE: - if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)) - swiotlb_bounce(hwdev, tlb_addr, size, DMA_TO_DEVICE); - else - BUG_ON(dir != DMA_FROM_DEVICE); - break; - default: - BUG(); - } + if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) + swiotlb_bounce(dev, tlb_addr, size, DMA_TO_DEVICE); + else + BUG_ON(dir != DMA_FROM_DEVICE); +} + +void swiotlb_sync_single_for_cpu(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir) +{ + if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) + swiotlb_bounce(dev, tlb_addr, size, DMA_FROM_DEVICE); + else + BUG_ON(dir != DMA_TO_DEVICE); } /* -- 2.25.1