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| author | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-07 11:39:16 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-07 11:39:16 -0600 |
| commit | fe537670eab767157eecc50538bd28e8d9b0ce9f (patch) | |
| tree | 99314e763b2b8400974d5ab233c813495ed58098 /include/linux/pci-dma-compat.h | |
| parent | bc4b024a8b8bd7dceb2697299aad2bda57d065e0 (diff) | |
| download | lwn-fe537670eab767157eecc50538bd28e8d9b0ce9f.tar.gz lwn-fe537670eab767157eecc50538bd28e8d9b0ce9f.zip | |
PCI: Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h
Christoph added a generic include/linux/pci-dma-compat.h, so now there's
one place with most of the PCI DMA interfaces. Move more PCI DMA-related
things there:
- The PCI_DMA_* direction constants from linux/pci.h
- The pci_set_dma_max_seg_size() and pci_set_dma_seg_boundary()
CONFIG_PCI implementations from drivers/pci/pci.c
- The pci_set_dma_max_seg_size() and pci_set_dma_seg_boundary()
!CONFIG_PCI stubs from linux/pci.h
- The pci_set_dma_mask() and pci_set_consistent_dma_mask()
!CONFIG_PCI stubs from linux/pci.h
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.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h index eafce7b6f052..39726caef5b1 100644 --- a/include/linux/pci-dma-compat.h +++ b/include/linux/pci-dma-compat.h @@ -6,6 +6,12 @@ #include <linux/dma-mapping.h> +/* This defines the direction arg to the DMA mapping routines. */ +#define PCI_DMA_BIDIRECTIONAL 0 +#define PCI_DMA_TODEVICE 1 +#define PCI_DMA_FROMDEVICE 2 +#define PCI_DMA_NONE 3 + static inline void * pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle) @@ -113,6 +119,29 @@ static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask) { return dma_set_coherent_mask(&dev->dev, mask); } + +static inline int pci_set_dma_max_seg_size(struct pci_dev *dev, + unsigned int size) +{ + return dma_set_max_seg_size(&dev->dev, size); +} + +static inline int pci_set_dma_seg_boundary(struct pci_dev *dev, + unsigned long mask) +{ + return dma_set_seg_boundary(&dev->dev, mask); +} +#else +static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) +{ return -EIO; } +static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask) +{ return -EIO; } +static inline int pci_set_dma_max_seg_size(struct pci_dev *dev, + unsigned int size) +{ return -EIO; } +static inline int pci_set_dma_seg_boundary(struct pci_dev *dev, + unsigned long mask) +{ return -EIO; } #endif #endif |