[Intel-gfx] [PATCH 08/16] drm/i915: Support readback of stolen objects upon error

[Chris Wilson]

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org>
Reviewed-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_irq.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 2604867..205413f 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -928,6 +928,14 @@ i915_error_object_create(struct drm_i915_private *dev_priv,
 						     reloc_offset);
 			memcpy_fromio(d, s, PAGE_SIZE);
 			io_mapping_unmap_atomic(s);
+		} else if (src->stolen) {
+			unsigned long offset;
+
+			offset = dev_priv->mm.stolen_base;
+			offset += src->stolen->start;
+			offset += i << PAGE_SHIFT;
+
+			memcpy_fromio(d, (void *)offset, PAGE_SIZE);
 		} else {
 			struct page *page;
 			void *s;
-- 
1.7.10.4