Solaris DDI specific (Solaris DDI).
The ddi_dma_cookie_t structure contains DMA address information required to program a DMA engine. It is filled in by a call to ddi_dma_getwin(9F), ddi_dma_addr_bind_handle(9F), or ddi_dma_buf_bind_handle(9F) to get device specific DMA transfer information for a DMA request or a DMA window.
uint64_t dmac_laddress; /* 64 bit address */ uint32_t dmac_address; /* 32 bit address */ size_t dmac_size; /* transfer size */ uint_t dmac_type; /* bus specific type bits */
dmac_laddress specifies a 64–bit I/O address appropriate for programming the device's DMA engine. If a device has a 64-bit DMA address register a driver should use this field to program the DMA engine. dmac_address specifies a 32–bit I/O address. It should be used for devices which have a 32-bit DMA address register. The I/O address range that the device can address and other DMA attributes have to be specified in a ddi_dma_attr(9S) structure.
dmac_size describes the length of the transfer in bytes.
dmac_type contains bus specific type bits, if appropriate. For example, a device on a VME bus will have VME address modifier bits placed here.