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-rw-r--r--bsd-core/drm_agpsupport.c2
-rw-r--r--bsd-core/drm_bufs.c12
2 files changed, 12 insertions, 2 deletions
diff --git a/bsd-core/drm_agpsupport.c b/bsd-core/drm_agpsupport.c
index 9aed5572..6f963b9c 100644
--- a/bsd-core/drm_agpsupport.c
+++ b/bsd-core/drm_agpsupport.c
@@ -184,7 +184,6 @@ int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode)
dev->agp->mode = mode.mode;
agp_enable(dev->agp->agpdev, mode.mode);
- dev->agp->base = dev->agp->info.ai_aperture_base;
dev->agp->enabled = 1;
return 0;
}
@@ -405,6 +404,7 @@ drm_agp_head_t *drm_agp_init(void)
return NULL;
head->agpdev = agpdev;
agp_get_info(agpdev, &head->info);
+ head->base = head->info.ai_aperture_base;
head->memory = NULL;
DRM_INFO("AGP at 0x%08lx %dMB\n",
(long)head->info.ai_aperture_base,
diff --git a/bsd-core/drm_bufs.c b/bsd-core/drm_bufs.c
index 65d8c82b..9b58c593 100644
--- a/bsd-core/drm_bufs.c
+++ b/bsd-core/drm_bufs.c
@@ -191,7 +191,17 @@ int drm_addmap(drm_device_t * dev, unsigned long offset, unsigned long size,
break;
case _DRM_AGP:
/*valid = 0;*/
- map->offset += dev->agp->base;
+ /* In some cases (i810 driver), user space may have already
+ * added the AGP base itself, because dev->agp->base previously
+ * only got set during AGP enable. So, only add the base
+ * address if the map's offset isn't already within the
+ * aperture.
+ */
+ if (map->offset < dev->agp->base ||
+ map->offset > dev->agp->base +
+ dev->agp->info.ai_aperture_size - 1) {
+ map->offset += dev->agp->base;
+ }
map->mtrr = dev->agp->mtrr; /* for getmap */
/*for (entry = dev->agp->memory; entry; entry = entry->next) {
if ((map->offset >= entry->bound) &&