diff options
Diffstat (limited to 'drivers/pci/p2pdma.c')
| -rw-r--r-- | drivers/pci/p2pdma.c | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 1eec7a5ec27e..771b45605853 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -792,23 +792,9 @@ void pci_p2pmem_publish(struct pci_dev *pdev, bool publish) } EXPORT_SYMBOL_GPL(pci_p2pmem_publish); -/** - * pci_p2pdma_map_sg - map a PCI peer-to-peer scatterlist for DMA - * @dev: device doing the DMA request - * @sg: scatter list to map - * @nents: elements in the scatterlist - * @dir: DMA direction - * @attrs: DMA attributes passed to dma_map_sg() (if called) - * - * Scatterlists mapped with this function should be unmapped using - * pci_p2pdma_unmap_sg_attrs(). - * - * Returns the number of SG entries mapped or 0 on error. - */ -int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, unsigned long attrs) +static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, + struct device *dev, struct scatterlist *sg, int nents) { - struct pci_p2pdma_pagemap *p2p_pgmap; struct scatterlist *s; phys_addr_t paddr; int i; @@ -824,7 +810,6 @@ int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, return 0; for_each_sg(sg, s, nents, i) { - p2p_pgmap = to_p2p_pgmap(sg_page(s)->pgmap); paddr = sg_phys(s); s->dma_address = paddr - p2p_pgmap->bus_offset; @@ -833,6 +818,28 @@ int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, return nents; } + +/** + * pci_p2pdma_map_sg - map a PCI peer-to-peer scatterlist for DMA + * @dev: device doing the DMA request + * @sg: scatter list to map + * @nents: elements in the scatterlist + * @dir: DMA direction + * @attrs: DMA attributes passed to dma_map_sg() (if called) + * + * Scatterlists mapped with this function should be unmapped using + * pci_p2pdma_unmap_sg_attrs(). + * + * Returns the number of SG entries mapped or 0 on error. + */ +int pci_p2pdma_map_sg_attrs(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, unsigned long attrs) +{ + struct pci_p2pdma_pagemap *p2p_pgmap = + to_p2p_pgmap(sg_page(sg)->pgmap); + + return __pci_p2pdma_map_sg(p2p_pgmap, dev, sg, nents); +} EXPORT_SYMBOL_GPL(pci_p2pdma_map_sg_attrs); /** |