SKB_FRAG_DMA_MAP(9) Linux Networking SKB_FRAG_DMA_MAP(9)NAME
skb_frag_dma_map - maps a paged fragment via the DMA API
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);
the device to map the fragment to
the paged fragment to map
the offset within the fragment (starting at the fragment's own offset)
the number of bytes to map
the direction of the mapping (PCI_DMA_*)
Maps the page associated with frag to device.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SKB_FRAG_DMA_MAP(9)
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gd_frameoffset(3) GETDATA gd_frameoffset(3)NAME
gd_frameoffset -- report the starting frame of fields in a dirfile
off_t gd_frameoffset(DIRFILE *dirfile, int fragment_index);
The gd_frameoffset() function queries a dirfile(5) database specified by dirfile and returns the frame offset (see dirfile-format(5)) for
the fragment indexed by fragment_index. The frame offset of a fragment indicate the frame number of the first sample of data stored in bi-
nary files associated with RAW fields defined in the specified fragment. The frame offset of a fragment containing no RAW fields is ig-
The dirfile argument must point to a valid DIRFILE object previously created by a call to gd_open(3).
Upon successful completion, gd_frameoffset() returns the frame offset of the specified fragment. On error, it returns -1 and sets the
dirfile error to a non-zero error value. Possible error values are:
The supplied dirfile was invalid.
The supplied index was out of range.
The dirfile error may be retrieved by calling gd_error(3). A descriptive error string for the last error encountered can be obtained from
a call to gd_error_string(3).
SEE ALSO gd_alter_frameoffset(3), gd_open(3), gd_error(3), gd_error_string(3), dirfile(5), dirfile-format(5)Version 0.7.0 15 July 2010 gd_frameoffset(3)
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