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| author | Alex Deucher <alexdeucher@gmail.com> | 2009-10-23 10:48:55 -0400 |
|---|---|---|
| committer | Alex Deucher <alexdeucher@gmail.com> | 2009-10-23 10:48:55 -0400 |
| commit | ac499c3c0ea92f83ebd8127bb8cb5de625de6c94 (patch) | |
| tree | 520fd84f0d0f8a8caab78efebacbd09423420735 /src/radeon_driver.c | |
| parent | e57b54daf318ff59315a1c9ed21934f288c5c782 (diff) | |
radeon: clamp the internal FB map to the aperture size v2
We don't use the invisible memory yet and on cards with
large amounts of vram this can cause the top of GART
calculation to overflow.
Fixes bug fdo bug 24301:
http://bugs.freedesktop.org/show_bug.cgi?id=24301
v2: only clamp cards with more than 512 MB. This seems
to cause problems on some older cards due to the way the
drm and ddx set up the internal memory map.
Diffstat (limited to 'src/radeon_driver.c')
| -rw-r--r-- | src/radeon_driver.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/radeon_driver.c b/src/radeon_driver.c index d039920b..7cb4c03f 100644 --- a/src/radeon_driver.c +++ b/src/radeon_driver.c @@ -1403,6 +1403,18 @@ static void RADEONInitMemoryMap(ScrnInfoPtr pScrn) if (aper_size > mem_size) mem_size = aper_size; + /* don't map the whole FB in the internal address space. + * we don't currently use fb space larger than the aperture + * size and on cards with more than 512 MB of vram, this can overflow + * the internal top of gart calculation on some systems. + * Limit it to cards with more than 512 MB as this causes problems + * on some other cards due to the way the ddx and drm set up the + * internal memory map. + * See fdo bug 24301. + */ + if (mem_size > 0x20000000) + mem_size = aper_size; + #ifdef XF86DRI /* Apply memory map limitation if using an old DRI */ if (info->directRenderingEnabled && !info->dri->newMemoryMap) { |