ddi_dma_devalign(9f) [bsd man page]

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)

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

NAME

       ddi_dma_curwin - report current DMA window offset and size

SYNOPSIS

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

       int ddi_dma_curwin(ddi_dma_handle_t handle, off_t *offp, uint_t *lenp);

INTERFACE LEVEL

       This interface is obsolete.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

PARAMETERS

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

       offp	       A  pointer  to  a value which will be filled in with the current offset from the beginning of the object that is mapped for
		       DMA.

       lenp	       A pointer to a value which will be filled in with the size, in bytes, of the current window onto the object that is  mapped
		       for DMA.

DESCRIPTION

       ddi_dma_curwin()  reports  the  current DMA window offset and size. If a DMA mapping allows partial mapping, that is if the DDI_DMA_PARTIAL
       flag in the ddi_dma_req(9S) structure is set, its current (effective) DMA window offset and size can be obtained by a call to  ddi_dma_cur-
       win().

RETURN VALUES

       ddi_dma_curwin() returns:

       DDI_SUCCESS     The current length and offset can be established.

       DDI_FAILURE     Otherwise.

CONTEXT

       ddi_dma_curwin() 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_getwin(9F), ddi_dma_movwin(9F), ddi_dma_setup(9F), ddi_dma_req(9S)

       Writing Device Drivers

SunOS 5.10							    27 Sep 2002 						ddi_dma_curwin(9F)