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| author | Ben Widawsky <ben@bwidawsk.net> | 2012-11-04 21:21:28 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-11-12 02:51:43 +0400 |
| commit | 03752f5b7b77b95d83479885040950fba1250850 (patch) | |
| tree | 7b9c007faef69561d6fc22ba17e8140380ffdf0b /drivers/gpu/drm/i915/i915_gem_gtt.c | |
| parent | e76e9aebcdbfebae8f4cd147e3c0f800d36e97f3 (diff) | |
| download | linux-03752f5b7b77b95d83479885040950fba1250850.tar.xz | |
drm/i915: Calculate correct stolen size for GEN7+
This bug existed in the old code, but was easier to fix here in the
rework. Unfortunately gen7 doesn't have a nice way to figure out the
size and we must use a lookup table.
As Jesse pointed out, there is some confusion in the docs about these
definitions. We're picking the one which seems more accurate, but we
really aren't certain.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index e74be0c2c6a5..814ed3ed7790 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -512,6 +512,15 @@ static inline unsigned int gen6_get_stolen_size(u16 snb_gmch_ctl) return snb_gmch_ctl << 25; /* 32 MB units */ } +static inline unsigned int gen7_get_stolen_size(u16 snb_gmch_ctl) +{ + static const int stolen_decoder[] = { + 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352}; + snb_gmch_ctl >>= IVB_GMCH_GMS_SHIFT; + snb_gmch_ctl &= IVB_GMCH_GMS_MASK; + return stolen_decoder[snb_gmch_ctl] << 20; +} + int i915_gem_gtt_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -557,7 +566,10 @@ int i915_gem_gtt_init(struct drm_device *dev) pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); dev_priv->mm.gtt->gtt_total_entries = gen6_get_total_gtt_size(snb_gmch_ctl) / sizeof(gtt_pte_t); - dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); + if (INTEL_INFO(dev)->gen < 7) + dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); + else + dev_priv->mm.gtt->stolen_size = gen7_get_stolen_size(snb_gmch_ctl); dev_priv->mm.gtt->gtt_mappable_entries = pci_resource_len(dev->pdev, 2) >> PAGE_SHIFT; /* 64/512MB is the current min/max we actually know of, but this is just a |