Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | Examples | Attributes | See Also
#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This interface is obsolete.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.
A DMA segment.
A pointer to an off_t. Upon a successful return, it is filled in with the offset. This segment is addressing within the object.
The byte length. This segment is addressing within the object.
A pointer to a DMA cookie (see ddi_dma_cookie(9S)).
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:
Successfully filled in all values.
Failed to successfully fill in all values.
The ddi_dma_segtocookie() function can be called from user, interrupt, or kernel context.
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)
Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | Examples | Attributes | See Also