diff options
| author | Pyun YongHyeon <yongari@FreeBSD.org> | 2011-05-20 18:27:13 +0000 |
|---|---|---|
| committer | Pyun YongHyeon <yongari@FreeBSD.org> | 2011-05-20 18:27:13 +0000 |
| commit | 7ba75dc4e9abb4f4ae2230d34381d50152c2342e (patch) | |
| tree | 95aa95723222f84de830fe4a27ae4ac1d0ef7b2f /sys/dev/vge | |
| parent | 81046d3cb345a6b5052d212db4bc995d3f7dc00f (diff) | |
Notes
Diffstat (limited to 'sys/dev/vge')
| -rw-r--r-- | sys/dev/vge/if_vge.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/sys/dev/vge/if_vge.c b/sys/dev/vge/if_vge.c index 4549bb08bca9..d9a58cce5b82 100644 --- a/sys/dev/vge/if_vge.c +++ b/sys/dev/vge/if_vge.c @@ -685,7 +685,18 @@ vge_dma_alloc(struct vge_softc *sc) bus_addr_t lowaddr, tx_ring_end, rx_ring_end; int error, i; - lowaddr = BUS_SPACE_MAXADDR; + /* + * It seems old PCI controllers do not support DAC. DAC + * configuration can be enabled by accessing VGE_CHIPCFG3 + * register but honor EEPROM configuration instead of + * blindly overriding DAC configuration. PCIe based + * controllers are supposed to support 64bit DMA so enable + * 64bit DMA on these controllers. + */ + if ((sc->vge_flags & VGE_FLAG_PCIE) != 0) + lowaddr = BUS_SPACE_MAXADDR; + else + lowaddr = BUS_SPACE_MAXADDR_32BIT; again: /* Create parent ring tag. */ @@ -802,10 +813,14 @@ again: goto again; } + if ((sc->vge_flags & VGE_FLAG_PCIE) != 0) + lowaddr = VGE_BUF_DMA_MAXADDR; + else + lowaddr = BUS_SPACE_MAXADDR_32BIT; /* Create parent buffer tag. */ error = bus_dma_tag_create(bus_get_dma_tag(sc->vge_dev),/* parent */ 1, 0, /* algnmnt, boundary */ - VGE_BUF_DMA_MAXADDR, /* lowaddr */ + lowaddr, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ BUS_SPACE_MAXSIZE_32BIT, /* maxsize */ |