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snd_dma_program(9) [centos man page]

SND_DMA_PROGRAM(9)					      Miscellaneous Functions						SND_DMA_PROGRAM(9)

NAME
snd_dma_program - program an ISA DMA transfer SYNOPSIS
void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); ARGUMENTS
dma the dma number addr the physical address of the buffer size the DMA transfer size mode the DMA transfer mode, DMA_MODE_XXX DESCRIPTION
Programs an ISA DMA transfer for the given buffer. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SND_DMA_PROGRAM(9)

Check Out this Related Man Page

ddi_iomin(9F)						   Kernel Functions for Drivers 					     ddi_iomin(9F)

NAME
ddi_iomin - find minimum alignment and transfer size for DMA SYNOPSIS
#include <sys/conf.h> #include <sys/ddi.h> #include <sys/sunddi.h> int ddi_iomin(dev_info_t *dip, int initial, int streaming); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
dip A pointer to the device's dev_info structure. initial The initial minimum DMA transfer size in bytes. This may be zero or an appropriate dlim_minxfer value for device's ddi_dma_lim structure (see ddi_dma_lim_sparc(9S) or ddi_dma_lim_x86(9S)). This value must be a power of two. streaming This argument, if non-zero, indicates that the returned value should be modified to account for streaming mode accesses (see ddi_dma_req(9S) for a discussion of streaming versus non-streaming access mode). DESCRIPTION
ddi_iomin(), finds out the minimum DMA transfer size for the device pointed to by dip. This provides a mechanism by which a driver can determine the effects of underlying caches as well as intervening bus adapters on the granularity of a DMA transfer. RETURN VALUES
ddi_iomin() returns the minimum DMA transfer size for the calling device, or it returns zero, which means that you cannot get there from here. CONTEXT
This function can be called from user or interrupt context. SEE ALSO
ddi_dma_devalign(9F), ddi_dma_setup(9F), ddi_dma_sync(9F), ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S) Writing Device Drivers SunOS 5.10 1 Feb 1994 ddi_iomin(9F)
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