bus_dma(9) specifies that for bus_dmamem_map() the flag BUS_DMA_COHERENT is a
hint; and that a device driver must not rely on this flag for correct
operation. All calls to bus_dmamap_sync() must still be made.
But for frame buffers this seems impractical to me and it appears in practice,
that
On Wed, 24 Aug 2011, Frank Zerangue wrote:
bus_dma(9) specifies that for bus_dmamem_map() the flag BUS_DMA_COHERENT is a
hint; and that a device driver must not rely on this flag for correct
operation. All calls to bus_dmamap_sync() must still be made.
But for frame buffers this seems
Hello,
On Wed, 24 Aug 2011 16:17:58 -0500
Frank Zerangue frank.zeran...@gmail.com wrote:
bus_dma(9) specifies that for bus_dmamem_map() the flag BUS_DMA_COHERENT is a
hint; and that a device driver must not rely on this flag for correct
operation. All calls to bus_dmamap_sync() must still
My frame buffer will be specific to my hardware and need not be portable. I
wanted to make sure I was not missing something.
Thank you Eduardo and Michael.
On Aug 24, 2011, at 5:45 PM, Michael wrote:
Hello,
On Wed, 24 Aug 2011 16:17:58 -0500
Frank Zerangue frank.zeran...@gmail.com wrote:
