Date: Mon, 7 Apr 2003 13:03:06 -0400 From: Hiten Pandya <hiten@unixdaemons.com> To: Jake Burkholder <jake@freebsd.org> Cc: cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/i386/i386 busdma_machdep.c Message-ID: <20030407170306.GA159@unixdaemons.com> In-Reply-To: <200304071608.h37G8WvI004534@repoman.freebsd.org> References: <200304071608.h37G8WvI004534@repoman.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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 > Log: > 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 > bus_dmamap_load_mbuf. > - 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 > add_bounce_pages. Thank you very much! -- Hiten
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030407170306.GA159>