10-18-2001
My question is: How can I give to a client a minimum guaranteed rate of 256kbit/sec? The upper limit is easy to set, but how about the guaranteed minimum rate?
Quote:
Originally posted by guest100
You don't need to set up the minimum limit. It is already set by default to 1024K
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LEARN ABOUT V7
ddi_dma_devalign
ddi_dma_devalign(9F) Kernel Functions for Drivers ddi_dma_devalign(9F)
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).
PARAMETERS
handle The DMA handle 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
ddi_dma_devalign() determines after a successful DMA mapping (see ddi_dma_setup(9F)) the minimum required data alignment and minimum DMA
transfer size.
RETURN VALUES
ddi_dma_devalign() returns:
DDI_SUCCESS The alignment and minxfr values have been filled.
DDI_FAILURE The handle was illegal.
CONTEXT
ddi_dma_devalign() can be called from user or interrupt context.
SEE ALSO
ddi_dma_setup(9F), ddi_iomin(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_dma_devalign(9F)