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authorChristoph Hellwig <hch@lst.de>2016-03-07 19:40:02 +0300
committerBjorn Helgaas <bhelgaas@google.com>2016-03-07 19:40:02 +0300
commitbc4b024a8b8bd7dceb2697299aad2bda57d065e0 (patch)
tree50eb9449ba9ea1d44873079b39a6b9ec65e7680c /include/linux/pci-dma-compat.h
parent611609bcf778a5f1aa321e632ac6dae50d507096 (diff)
downloadlinux-bc4b024a8b8bd7dceb2697299aad2bda57d065e0.tar.xz
PCI: Move pci_dma_* helpers to common code
For a long time all architectures implement the pci_dma_* functions using the generic DMA API, and they all use the same header to do so. Move this header, pci-dma-compat.h, to include/linux and include it from the generic pci.h instead of having each arch duplicate this include. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/linux/pci-dma-compat.h')
-rw-r--r--include/linux/pci-dma-compat.h118
1 files changed, 118 insertions, 0 deletions
diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h
new file mode 100644
index 000000000000..eafce7b6f052
--- /dev/null
+++ b/include/linux/pci-dma-compat.h
@@ -0,0 +1,118 @@
+/* include this file if the platform implements the dma_ DMA Mapping API
+ * and wants to provide the pci_ DMA Mapping API in terms of it */
+
+#ifndef _ASM_GENERIC_PCI_DMA_COMPAT_H
+#define _ASM_GENERIC_PCI_DMA_COMPAT_H
+
+#include <linux/dma-mapping.h>
+
+static inline void *
+pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
+ dma_addr_t *dma_handle)
+{
+ return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
+}
+
+static inline void *
+pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
+ dma_addr_t *dma_handle)
+{
+ return dma_zalloc_coherent(hwdev == NULL ? NULL : &hwdev->dev,
+ size, dma_handle, GFP_ATOMIC);
+}
+
+static inline void
+pci_free_consistent(struct pci_dev *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ dma_free_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, vaddr, dma_handle);
+}
+
+static inline dma_addr_t
+pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)
+{
+ return dma_map_single(hwdev == NULL ? NULL : &hwdev->dev, ptr, size, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
+ size_t size, int direction)
+{
+ dma_unmap_single(hwdev == NULL ? NULL : &hwdev->dev, dma_addr, size, (enum dma_data_direction)direction);
+}
+
+static inline dma_addr_t
+pci_map_page(struct pci_dev *hwdev, struct page *page,
+ unsigned long offset, size_t size, int direction)
+{
+ return dma_map_page(hwdev == NULL ? NULL : &hwdev->dev, page, offset, size, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,
+ size_t size, int direction)
+{
+ dma_unmap_page(hwdev == NULL ? NULL : &hwdev->dev, dma_address, size, (enum dma_data_direction)direction);
+}
+
+static inline int
+pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
+ int nents, int direction)
+{
+ return dma_map_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
+ int nents, int direction)
+{
+ dma_unmap_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle,
+ size_t size, int direction)
+{
+ dma_sync_single_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
+ size_t size, int direction)
+{
+ dma_sync_single_for_device(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ dma_sync_sg_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
+}
+
+static inline void
+pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ dma_sync_sg_for_device(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
+}
+
+static inline int
+pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
+{
+ return dma_mapping_error(&pdev->dev, dma_addr);
+}
+
+#ifdef CONFIG_PCI
+static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
+{
+ return dma_set_mask(&dev->dev, mask);
+}
+
+static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
+{
+ return dma_set_coherent_mask(&dev->dev, mask);
+}
+#endif
+
+#endif