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,
     size_t len, uint_t flags, int (*waitfp) (caddr_t), caddr_t arg, 
     ddi_dma_lim_t * lim, ddi_dma_handle_t *handlep);

Interface Level

This interface is obsolete. ddi_dma_addr_bind_handle(9F) should be used instead.

Parameters

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

The ddi_dma_addr_setup() function 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(9F) with it.

Return Values

See ddi_dma_setup(9F) for the possible return values for this function.

Context

The ddi_dma_addr_setup() can be called from user, interrupt, or kernel context, except when waitfp is set to DDI_DMA_SLEEP, in which case it cannot be called from interrupt context.

Attributes

See attributes(5) for a description of the following attributes:

See Also

attributes(5), ddi_dma_buf_setup(9F), ddi_dma_free(9F), ddi_dma_htoc(9F), ddi_dma_setup(9F), ddi_dma_sync(9F), ddi_iopb_alloc(9F), ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S)

Writing Device Drivers