./_Man_Solaris_2.5_html/html9f/ddi_dma_addr

Manual page for ddi_dma_addr_setup(9F)

ddi_dma_addr_setup - easier DMA setup for use with virtual addresses

SYNOPSIS

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

int ddi_dma_addr_setup(dev_info_t *dip, struct as *as, caddr_t addr, u_int len,
u_int flags, int (*waitfp )(caddr_t), caddr_t arg, ddi_dma_lim_t *lim ,
ddi_dma_handle_t *handlep);

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).

ARGUMENTS

dip: A pointer to the device's dev_info structure.
as: A pointer to an address space structure. Should be set to NULL, which implies kernel address space.
addr: Virtual address of the memory object.
len: Length of the memory object in bytes.
flags: Flags that would go into the ddi_dma_req structure (see ddi_dma_req.9s
waitfp: The address of a function to call back later if resources aren't available now. The special function addresses DDI_DMA_SLEEP and DDI_DMA_DONTWAIT (see ddi_dma_req.9s are taken to mean, respectively, wait until resources are available or, do not wait at all and do not schedule a callback.
arg: Argument to be passed to a callback function, if such a function is specified.
lim: A pointer to a DMA limits structure for this device (see ddi_dma_lim_sparc.9s or ddi_dma_lim_x86.9s If this pointer is NULL, a default set of DMA limits is assumed.
handlep: Pointer to a DMA handle. See ddi_dma_setup.9f for a discussion of handle.

DESCRIPTION

ddi_dma_addr_setup() is an interface to ddi_dma_setup.9f It uses its arguments to construct an appropriate ddi_dma_req structure and calls ddi_dma_setup() with it.

RETURN VALUES

See ddi_dma_setup.9f for the possible return values for this function.

CONTEXT

ddi_dma_addr_setup() can be called from user or interrupt context, except when waitfp is set to DDI_DMA_SLEEP, in which case it can be called from user context only.