diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-06-24 22:23:14 +0200 |
|---|---|---|
| committer | Matthieu Herrb <matthieu@herrb.eu> | 2015-06-24 22:24:09 +0200 |
| commit | 6271ed02ba9fbea886fb2d06f694c10f5e1610e5 (patch) | |
| tree | 8672482c5d985af4622d69142b2f8f6f989282de | |
| parent | 3e90b53b00b188a0db2c3a60c94582dc79ab14d2 (diff) | |
Attempt to establish a write combining mapping instead of relying on mttrs.
Setting the mttrs failson my thinkpad x1 rev 3, making the xorg-video-vesa
driver painfully slow. This makes the machine somewhat usable.
ok mpi@
| -rw-r--r-- | src/openbsd_pci.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/openbsd_pci.c b/src/openbsd_pci.c index b8b68ad..15cd900 100644 --- a/src/openbsd_pci.c +++ b/src/openbsd_pci.c @@ -193,12 +193,18 @@ pci_device_openbsd_map_range(struct pci_device *dev, struct mem_range_desc mr; struct mem_range_op mo; int prot = PROT_READ; + off_t addr = map->base; if (map->flags & PCI_DEV_MAP_FLAG_WRITABLE) prot |= PROT_WRITE; +#ifdef MEMRANGE_WC_RANGE + if (map->flags & PCI_DEV_MAP_FLAG_WRITABLE) + addr += MEMRANGE_WC_RANGE; +#endif + map->memory = mmap(NULL, map->size, prot, MAP_SHARED, aperturefd, - map->base); + addr); if (map->memory == MAP_FAILED) return errno; #if defined(__i386__) || defined(__amd64__) |