diff options
| author | yongari <yongari@FreeBSD.org> | 2011-01-10 17:45:09 +0000 |
|---|---|---|
| committer | yongari <yongari@FreeBSD.org> | 2011-01-10 17:45:09 +0000 |
| commit | b398f2bdb6d1a71b07d3f3df592691a156443f21 (patch) | |
| tree | a9655fd9227f02e18d7ceadfd434c869002bf0bb /sys/dev/bge | |
| parent | dafab263540342d71fe700d3506b22fe04902235 (diff) | |
| download | FreeBSD-src-b398f2bdb6d1a71b07d3f3df592691a156443f21.zip FreeBSD-src-b398f2bdb6d1a71b07d3f3df592691a156443f21.tar.gz | |
Apply DMA address space restriction to controllers that have 4GB
DMA boundary bug and runs with PCI-X mode. watchdog timeout was
observed on BCM5704 which lives behind certain PCI-X bridge(e.g.
AMD 8131 PCI-X bridge). It's still not clear whether the root
cause came from that PCI-X bridge or not. The watchdog timeout
indicates the issue is in TX path. If the bridge reorders TX
mailbox write accesses it would generate all kinds of problems but
I'm not sure. This should be revisited.
Tested by: Michael L. Squires (mikes <> siralan dot org)
Diffstat (limited to 'sys/dev/bge')
| -rw-r--r-- | sys/dev/bge/if_bge.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/dev/bge/if_bge.c b/sys/dev/bge/if_bge.c index 3f9d6d2..9bec08b 100644 --- a/sys/dev/bge/if_bge.c +++ b/sys/dev/bge/if_bge.c @@ -2473,8 +2473,18 @@ bge_dma_alloc(struct bge_softc *sc) /* Create parent tag for buffers. */ boundary = 0; - if ((sc->bge_flags & BGE_FLAG_4G_BNDRY_BUG) != 0) + if ((sc->bge_flags & BGE_FLAG_4G_BNDRY_BUG) != 0) { boundary = BGE_DMA_BNDRY; + /* + * XXX + * watchdog timeout issue was observed on BCM5704 which + * lives behind PCI-X bridge(e.g AMD 8131 PCI-X bridge). + * Limiting DMA address space to 32bits seems to address + * it. + */ + if (sc->bge_flags & BGE_FLAG_PCIX) + lowaddr = BUS_SPACE_MAXADDR_32BIT; + } error = bus_dma_tag_create(bus_get_dma_tag(sc->bge_dev), 1, boundary, lowaddr, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, |
