skb_frag_dma_map (9) Linux Manual Page

skb_frag_dma_map – maps a paged fragment via the DMA API

Synopsis

dma_addr_t skb_frag_dma_map(struct device * dev, const skb_frag_t * frag, size_t offset, size_t size, enum dma_data_direction dir);

Arguments

dev

the device to map the fragment to

frag

the paged fragment to map

offset

the offset within the fragment (starting at the fragment’s own offset)

size

the number of bytes to map

dir

the direction of the mapping (PCI_DMA_*)

Description

Maps the page associated with frag to device.

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