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drm/i915: Use the correct size of the GTT for placing the per-process entries

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The current layout is to place the per-process tables at the end of the
GTT. However, this is currently using a hardcoded maximum size for the GTT
and not taking in account limitations imposed by the BIOS. Use the value
for the total number of entries allocated in the table as provided by
the configuration registers.

Reported-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Matthew Garret <mjg@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-08-24 09:12:22 +01:00 committed by Daniel Vetter
parent 5ee369138d
commit 9a0f938bde
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -72,7 +72,7 @@ int i915_gem_init_aliasing_ppgtt(struct drm_device *dev)
/* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024 /* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024
* entries. For aliasing ppgtt support we just steal them at the end for * entries. For aliasing ppgtt support we just steal them at the end for
* now. */ * now. */
first_pd_entry_in_global_pt = 512*1024 - I915_PPGTT_PD_ENTRIES; first_pd_entry_in_global_pt = dev_priv->mm.gtt->gtt_total_entries - I915_PPGTT_PD_ENTRIES;
ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
if (!ppgtt) if (!ppgtt)