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authorJesse Barnes <jbarnes@virtuousgeek.org>2010-07-08 09:22:46 -0700
committerEric Anholt <eric@anholt.net>2010-08-01 19:58:57 -0700
commitd1d6ca73ef548748e141747e7260798327d6a2c1 (patch)
tree0a69cbfb66f2b30d707f24861baf3399d77c350b /drivers/gpu
parentcda4b7d3a5b1dcbc0d8e7bad52134347798e9047 (diff)
downloadop-kernel-dev-d1d6ca73ef548748e141747e7260798327d6a2c1.zip
op-kernel-dev-d1d6ca73ef548748e141747e7260798327d6a2c1.tar.gz
drm/agp/i915: trim stolen space to 32M
Some BIOSes will claim a large chunk of stolen space. Unless we reclaim it, our aperture for remapping buffer objects will be constrained. So clamp the stolen space to 32M and ignore the rest. Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15469 among others. Adding the ignored stolen memory back into the general pool using the memory hotplug code is left as an exercise for the reader. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: Simon Farnsworth <simon.farnsworth@onelan.com> Tested-by: Artem S. Tashkinov <t.artem@mailcity.com> Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/i915_dma.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 14054c0..f19ffe8 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -41,6 +41,8 @@
#include <linux/vga_switcheroo.h>
#include <linux/slab.h>
+extern int intel_max_stolen; /* from AGP driver */
+
/**
* Sets up the hardware status page for devices that need a physical address
* in the register.
@@ -2106,6 +2108,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
if (ret)
goto out_iomapfree;
+ if (prealloc_size > intel_max_stolen) {
+ DRM_INFO("detected %dM stolen memory, trimming to %dM\n",
+ prealloc_size >> 20, intel_max_stolen >> 20);
+ prealloc_size = intel_max_stolen;
+ }
+
dev_priv->wq = create_singlethread_workqueue("i915");
if (dev_priv->wq == NULL) {
DRM_ERROR("Failed to create our workqueue.\n");
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