Date: Thu, 09 Mar 2000 22:58:32 -0800 From: Mike Smith <msmith@freebsd.org> To: alpha@freebsd.org Subject: problem with bus_dmamap_destroy? Message-ID: <200003100658.WAA00620@mass.cdrom.com>
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Just wondering if anyone's seen a problem with bus_dmamap_destroy()
hanging on the Alpha. I've tracked down a hang when unloading the Mylex
driver which doesn't maifest on the i386.
error = bus_dma_tag_create(sc->mlx_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, MLX_NSEG, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->mlx_buffer_dmat);
...
bus_dmamap_create(sc->mlx_buffer_dmat, 0, &mc->mc_dmamap);
...
bus_dmamap_destroy(sc->mlx_buffer_dmat, mc->mc_dmamap);
I've had someone suggest that the lowaddr parameter should be 0; is this
actually correct? (The DMA mapping does otherwise seem to work...)
Any "been there, done that" suggestions before I dig into this?
Thanks.
--
\\ Give a man a fish, and you feed him for a day. \\ Mike Smith
\\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org
\\ and he'll hate you for a lifetime. \\ msmith@cdrom.com
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