[Intel-gfx] [PATCH 2/7] drm/i915: limit ttm to dma32 for i965G[M]

[Adrian Larumbe <adrian.larumbe@collabora.com>]

From: Robert Beckett <bob.beckett@collabora.com>

i965G[M] cannot relocate objects above 4GiB.
Ensure ttm uses dma32 on these systems.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_region_ttm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c
index 575d67bc6ffe..88b525f9bb2d 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.c
+++ b/drivers/gpu/drm/i915/intel_region_ttm.c
@@ -32,10 +32,15 @@
 int intel_region_ttm_device_init(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *drm = &dev_priv->drm;
+	bool use_dma32 = false;
+
+	/* i965g[m] cannot relocate objects above 4GiB. */
+	if (IS_I965GM(dev_priv) || IS_I965G(dev_priv))
+		use_dma32 = true;
 
 	return ttm_device_init(&dev_priv->bdev, i915_ttm_driver(),
 			       drm->dev, drm->anon_inode->i_mapping,
-			       drm->vma_offset_manager, false, false);
+			       drm->vma_offset_manager, false, use_dma32);
 }
 
 /**
-- 
2.37.0