cvs commit: src/sys/i386/i386 busdma_machdep.c
hiten at unixdaemons.com
Mon Apr 7 10:03:12 PDT 2003
Jake Burkholder (Mon, Apr 07, 2003 at 09:08:32AM -0700) wrote:
> jake 2003/04/07 09:08:32 PDT
> FreeBSD src repository
> Modified files:
> sys/i386/i386 busdma_machdep.c
> Add support for bounce buffers to _bus_dmamap_load_buffer, which is the
> backend for bus_dmamap_load_mbuf and bus_dmamap_load_uio.
> - Increaes MAX_BPAGES to 512. Less than this causes fxp to quickly runs out
> of bounce pages.
> - Add an argument to reserve_bounce_pages indicating wether this operation
> should fail or be queued for later processing if we run out of memory.
> The EINPROGRESS return value is not handled properly by consumers of
> - If bounce buffers are required allocate minimum 1 bounce page at map
> creation time. If maxsize was small previously this could get truncated
> to 0 and the drivers would quickly run out of bounce pages.
> - Fix a bug handling the return value of alloc_bounce_pages at map creation
> time. It returns the number of pages allocated, not 0 on success.
> - Use bus_addr_t for physical addresses to avoid truncation.
> - Assert that the map is non-null and not the no bounce map in
Thank you very much!
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