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ddi_dma_segtocookie - convert a DMA segment to a DMA address cookie

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



int ddi_dma_segtocookie(ddi_dma_seg_t seg, off_t *offp, off_t *lenp,
 ddi_dma_cookie_t *cookiep);

This interface is obsolete.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

seg

offp

lenp

cookiep

The ddi_dma_segtocookie() function takes a DMA segment 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. ddi_dma_segtocookie() also fills in *offp and *lenp, which specify the range within the object.

The ddi_dma_segtocookie() function returns:

DDI_SUCCESS

DDI_FAILURE

The ddi_dma_segtocookie() function can be called from user, interrupt, or kernel context.

Example 1 ddi_dma_segtocookie() example

for (win = NULL; (retw = ddi_dma_nextwin(handle, win, &nwin)) !=
 DDI_DMA_DONE; win = nwin) {
 if (retw != DDI_SUCCESS) {
 /* do error handling */
 } else {
 for (seg = NULL; (rets = ddi_dma_nextseg(nwin, seg, &nseg)) !=
 DDI_DMA_DONE; seg = nseg) {
 if (rets != DDI_SUCCESS) {

 /* do error handling */ 
 } else {
 ddi_dma_segtocookie(nseg, &off, &len, &cookie);

 /* program DMA engine */
 }
 }
 }
}

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Stability Level	Obsolete

attributes(5), ddi_dma_nextcookie(9F). ddi_dma_nextseg(9F), ddi_dma_nextwin(9F), ddi_dma_sync(9F), ddi_dma_cookie(9S)

Writing Device Drivers