AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

drm/i915: Set up an MTRR covering the GTT at driver load.

Browse Source 
We'd love to just be using PAT, but even on chips with PAT it gets disabled
sometimes due to an errata.  It would probably be better to have pat_enabled
exported and only bother with this when !pat_enabled.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Eric Anholt 2009-01-23 12:57:47 -08:00 committed by Dave Airlie
parent 725e30ad66
commit ab657db12d
3 changed files with 25 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/gpu/drm/i915/i915_dma.c
View File

@ -966,10 +966,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
if (ret)
goto kfree_devname;
dev_priv->mm.gtt_mapping =
io_mapping_create_wc(dev->agp->base,
dev->agp->agp_info.aper_size * 1024*1024);
/* Allow hardware batchbuffers unless told otherwise.
*/
dev_priv->allow_batchbuffer = 1;
@ -1081,6 +1077,23 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
goto free_priv;
}
dev_priv->mm.gtt_mapping =
io_mapping_create_wc(dev->agp->base,
dev->agp->agp_info.aper_size * 1024*1024);
/* Set up a WC MTRR for non-PAT systems. This is more common than
* one would think, because the kernel disables PAT on first
* generation Core chips because WC PAT gets overridden by a UC
* MTRR if present. Even if a UC MTRR isn't present.
*/
dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
dev->agp->agp_info.aper_size *
1024 * 1024,
MTRR_TYPE_WRCOMB, 1);
if (dev_priv->mm.gtt_mtrr < 0) {
DRM_INFO("MTRR allocation failed\n. Graphics "
"performance may suffer.\n");
}
#ifdef CONFIG_HIGHMEM64G
/* don't enable GEM on PAE - needs agp + set_memory_* interface fixes */
dev_priv->has_gem = 0;
@ -1145,8 +1158,14 @@ int i915_driver_unload(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
io_mapping_free(dev_priv->mm.gtt_mapping);
if (dev_priv->mm.gtt_mtrr >= 0) {
mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
dev->agp->agp_info.aper_size * 1024 * 1024);
dev_priv->mm.gtt_mtrr = -1;
}
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
io_mapping_free(dev_priv->mm.gtt_mapping);
drm_irq_uninstall(dev);
}

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -284,6 +284,7 @@ typedef struct drm_i915_private {
struct drm_mm gtt_space;
struct io_mapping *gtt_mapping;
int gtt_mtrr;
/**
* List of objects currently involved in rendering from the

6
drivers/gpu/drm/i915/i915_gem.c
View File

@ -3229,10 +3229,6 @@ i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
dev_priv->mm.wedged = 0;
}
dev_priv->mm.gtt_mapping = io_mapping_create_wc(dev->agp->base,
dev->agp->agp_info.aper_size
* 1024 * 1024);
mutex_lock(&dev->struct_mutex);
dev_priv->mm.suspended = 0;
@ -3255,7 +3251,6 @@ int
i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret;
if (drm_core_check_feature(dev, DRIVER_MODESET))
@ -3264,7 +3259,6 @@ i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
ret = i915_gem_idle(dev);
drm_irq_uninstall(dev);
io_mapping_free(dev_priv->mm.gtt_mapping);
return ret;
}