[PATCH 01/43] drm/i915: Remove guard page insertion around unevictable nodes

Chris Wilson chris at chris-wilson.co.uk
Mon Jan 25 10:00:27 UTC 2021


Assume that unevictable nodes are not in the GTT and so we can ignore
page boundary concerns, and so allow regular nodes to abutt against
irregular unevictable nodes.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.h       |  2 --
 drivers/gpu/drm/i915/i915_gem_evict.c |  6 ++++--
 drivers/gpu/drm/i915/i915_vma.h       | 10 +++++++++-
 drivers/gpu/drm/i915/i915_vma_types.h |  2 ++
 4 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e0fcfc5590d9..19db191bd1bd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -357,8 +357,6 @@ enum i915_cache_level {
 	I915_CACHE_WT, /* hsw:gt3e WriteThrough for scanouts */
 };
 
-#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */
-
 struct intel_fbc {
 	/* This is always the inner lock when overlapping with struct_mutex and
 	 * it's the outer lock when overlapping with stolen_lock. */
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index 4d2d59a9942b..aef88fdb9f66 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -313,11 +313,13 @@ int i915_gem_evict_for_node(struct i915_address_space *vm,
 		 */
 		if (i915_vm_has_cache_coloring(vm)) {
 			if (node->start + node->size == target->start) {
-				if (node->color == target->color)
+				if (i915_node_color_matches(node,
+							    target->color))
 					continue;
 			}
 			if (node->start == target->start + target->size) {
-				if (node->color == target->color)
+				if (i915_node_color_matches(node,
+							    target->color))
 					continue;
 			}
 		}
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index a64adc8c883b..163e9e3cc239 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -283,10 +283,18 @@ static inline bool i915_vma_is_bound(const struct i915_vma *vma,
 	return atomic_read(&vma->flags) & where;
 }
 
+static inline bool i915_node_color_matches(const struct drm_mm_node *node,
+					   unsigned long color)
+{
+	return (node->color | color) == I915_COLOR_UNEVICTABLE ||
+		node->color == color;
+}
+
 static inline bool i915_node_color_differs(const struct drm_mm_node *node,
 					   unsigned long color)
 {
-	return drm_mm_node_allocated(node) && node->color != color;
+	return drm_mm_node_allocated(node) &&
+		!i915_node_color_matches(node, color);
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h
index f5cb848b7a7e..e72a07692a64 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -95,6 +95,8 @@ enum i915_cache_level;
  *
  */
 
+#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */
+
 struct intel_remapped_plane_info {
 	/* in gtt pages */
 	unsigned int width, height, stride, offset;
-- 
2.20.1



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