ddi_dma_coff(9f) [sunos man page]

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

NAME

       ddi_dma_coff - convert a DMA cookie to an offset within a DMA handle

SYNOPSIS

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

       int ddi_dma_coff(ddi_dma_handle_t handle, ddi_dma_cookie_t *cookiep, off_t *offp);

INTERFACE LEVEL

       Solaris SPARC DDI (Solaris SPARC DDI).

PARAMETERS

       handle	       The handle filled in by a call to ddi_dma_setup(9F).

       cookiep	       A pointer to a DMA cookie (see ddi_dma_cookie(9S)) that contains the appropriate address, length and bus type to be used in
		       programming the DMA engine.

       offp	       A pointer to an offset to be filled in.

DESCRIPTION

       ddi_dma_coff() converts the values in DMA cookie pointed to by cookiep to an offset (in bytes) from the beginning of the  object  that  the
       DMA handle has mapped.

       ddi_dma_coff() allows a driver to update a DMA cookie with values it reads from its device's DMA engine after a transfer completes and con-
       vert that value into an offset into the object that is mapped for DMA.

RETURN VALUES

       ddi_dma_coff() returns:

       DDI_SUCCESS     Successfully filled in offp.

       DDI_FAILURE     Failed to successfully fill in offp.

CONTEXT

       ddi_dma_coff() can be called from user or interrupt context.

SEE ALSO

       ddi_dma_setup(9F), ddi_dma_sync(9F), ddi_dma_cookie(9S)

       Writing Device Drivers

SunOS 5.10							    4 Nov 1991							  ddi_dma_coff(9F)

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

NAME

       ddi_dma_htoc - convert a DMA handle to a DMA address cookie

SYNOPSIS

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

       int ddi_dma_htoc(ddi_dma_handle_t handle, off_t off, ddi_dma_cookie_t *cookiep);

INTERFACE LEVEL

       This interface is obsolete.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

PARAMETERS

       handle	       The handle filled in by a call to ddi_dma_setup(9F).

       off	       An offset into the object that handle maps.

       cookiep	       A pointer to a ddi_dma_cookie(9S) structure.

DESCRIPTION

       ddi_dma_htoc()  takes  a  DMA handle (established by ddi_dma_setup(9F)), and fills in the cookie pointed to by cookiep with the appropriate
       address, length, and bus type to be used to program the DMA engine.

RETURN VALUES

       ddi_dma_htoc() returns:

       DDI_SUCCESS     Successfully filled in the cookie pointed to by cookiep.

       DDI_FAILURE     Failed to successfully fill in the cookie.

CONTEXT

       ddi_dma_htoc() can be called from user or interrupt context.

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_bind_handle(9F), ddi_dma_addr_setup(9F), ddi_dma_buf_bind_handle(9F), ddi_dma_buf_setup(9F), ddi_dma_setup(9F),
       ddi_dma_sync(9F), ddi_dma_cookie(9S)

       Writing Device Drivers

SunOS 5.10							    27 Sep 2002 						  ddi_dma_htoc(9F)