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

NAME

       ddi_dma_buf_setup - easier DMA setup for use with buffer structures

SYNOPSIS

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

       int  ddi_dma_buf_setup(dev_info_t  *dip,  struct  buf  *bp,  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       This interface is obsolete.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_buf_bind_handle(9F) should be used instead.

PARAMETERS

       dip	       A pointer to the device's dev_info structure.

       bp	       A pointer to a system buffer structure (see buf(9S)).

       flags	       Flags that go into a 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 avail-
		       able, 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_buf_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_buf_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.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Stability Level 	     |Obsolete			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5),  ddi_dma_addr_setup(9F),	ddi_dma_free(9F),  ddi_dma_htoc(9F),  ddi_dma_setup(9F),  ddi_dma_sync(9F),  physio(9F),  buf(9S),
       ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S)

       Writing Device Drivers

SunOS 5.10							    27 Sep 2002 					     ddi_dma_buf_setup(9F)