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linux-next/include/linux/pci-dma-compat.h
Christoph Hellwig 4167b2ad51 PCI: Remove NULL device handling from PCI DMA API
Historically some ISA drivers used the old PCI DMA API with a NULL pdev
argument, but these days this isn't used and not too useful due to the
per-device DMA ops, so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-01-17 18:05:51 -06:00

148 lines
4.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* 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>
/* 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)
{
return dma_alloc_coherent(&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->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->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->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->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->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->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->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->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->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->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->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->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);
}
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