Проект OpenNet: MAN ddi_dma_devalign (9) Ядро (FreeBSD и Linux)

Интерактивная система просмотра системных руководств (man-ов)

ddi_dma_devalign (9)

>> ddi_dma_devalign (9) ( Solaris man: Ядро )

NAME

ddi_dma_devalign - find DMA mapping alignment and minimum transfer size

SYNOPSIS

#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



int ddi_dma_devalign(ddi_dma_handle_t handle, uint_t *alignment, 
    uint_t *minxfr);

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI). This interface is obsolete.

PARAMETERS

handle

: The DMAhandle filled in by a successful call to ddi_dma_setup(9F).

alignment

: A pointer to an unsigned integer to be filled in with the minimum required alignment for DMA. The alignment is guaranteed to be a power of two.

minxfr

: A pointer to an unsigned integer to be filled in with the minimum effective transfer size (see ddi_iomin(9F), ddi_dma_lim_sparc(9S) and ddi_dma_lim_x86(9S)). This also is guaranteed to be a power of two.

DESCRIPTION

The ddi_dma_devalign() Function determines after a successful DMA mapping (see ddi_dma_setup(9F)) the minimum required data alignment and minimum DMA transfer size.

RETURN VALUES

The ddi_dma_devalign() function returns:

DDI_SUCCESS

: The alignment and minxfr values have been filled.

DDI_FAILURE

: The handle was illegal.

CONTEXT

The ddi_dma_devalign() function can be called from user, interrupt, or kernel context.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Obsolete

Хоcтинг: