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| author | marius <marius@FreeBSD.org> | 2008-11-19 22:09:03 +0000 |
|---|---|---|
| committer | marius <marius@FreeBSD.org> | 2008-11-19 22:09:03 +0000 |
| commit | fd213ef8e29e5b912cedf5f66e5eb00c96893c00 (patch) | |
| tree | e1e56b97926247afd1f8a10df81e58253fcabd65 /sys/dev/dcons | |
| parent | 26ef99f3eb54f1828a50aceb37318f39cf3480ec (diff) | |
| download | FreeBSD-src-fd213ef8e29e5b912cedf5f66e5eb00c96893c00.zip FreeBSD-src-fd213ef8e29e5b912cedf5f66e5eb00c96893c00.tar.gz | |
Given that the buffer dcons_crom(4) exposes is used for both input
and output, set BUS_DMA_COHERENT when creating the DMA map used for
loading the buffer. As a side-effect this solves locking issues on
sparc64 when dcons(4) calls bus_dmamap_sync(9) while in an interrupt
filter, which are executed in a critical section, and iommu(4) has
to use a sleep lock when taking advantage of the streaming buffer.
Reported and tested by: kensmith
Approved by: simokawa
Diffstat (limited to 'sys/dev/dcons')
| -rw-r--r-- | sys/dev/dcons/dcons_crom.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/dcons/dcons_crom.c b/sys/dev/dcons/dcons_crom.c index 290bb1e..0b2b707 100644 --- a/sys/dev/dcons/dcons_crom.c +++ b/sys/dev/dcons/dcons_crom.c @@ -229,7 +229,7 @@ dcons_crom_attach(device_t dev) /*lockarg*/&Giant, #endif &sc->dma_tag); - bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map); + bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map); bus_dmamap_load(sc->dma_tag, sc->dma_map, (void *)dcons_conf->buf, dcons_conf->size, dmamap_cb, sc, 0); |
