[PATCH 2/2] drm/i915: force ccs for backup

[Matthew Auld]

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c       |  3 +++
 drivers/gpu/drm/i915/gem/i915_gem_object_types.h |  4 +++-
 drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c       | 10 +++++++++-
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 733696057761..86be69832de3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -785,6 +785,9 @@ bool i915_gem_object_needs_ccs_pages(struct drm_i915_gem_object *obj)
 	if (!HAS_FLAT_CCS(to_i915(obj->base.dev)))
 		return false;
 
+	if (obj->flags & I915_BO_ALLOC_CCS)
+		return true;
+
 	for (i = 0; i < obj->mm.n_placements; i++) {
 		/* Compression is not allowed for the objects with smem placement */
 		if (obj->mm.placements[i]->type == INTEL_MEMORY_SYSTEM)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index a7b70701617a..ceb73f5fb559 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -327,13 +327,15 @@ struct drm_i915_gem_object {
  * dealing with userspace objects the CPU fault handler is free to ignore this.
  */
 #define I915_BO_ALLOC_GPU_ONLY	  BIT(6)
+#define I915_BO_ALLOC_CCS	  BIT(7)
 #define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | \
 			     I915_BO_ALLOC_VOLATILE | \
 			     I915_BO_ALLOC_CPU_CLEAR | \
 			     I915_BO_ALLOC_USER | \
 			     I915_BO_ALLOC_PM_VOLATILE | \
 			     I915_BO_ALLOC_PM_EARLY | \
-			     I915_BO_ALLOC_GPU_ONLY)
+			     I915_BO_ALLOC_GPU_ONLY | \
+			     I915_BO_ALLOC_CCS)
 #define I915_BO_READONLY          BIT(7)
 #define I915_TILING_QUIRK_BIT     8 /* unknown swizzling; do not release! */
 #define I915_BO_PROTECTED         BIT(9)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
index 07e49f22f2de..c9c491530bb2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
@@ -51,6 +51,7 @@ static int i915_ttm_backup(struct i915_gem_apply_to_region *apply,
 	struct drm_i915_gem_object *backup;
 	struct ttm_operation_ctx ctx = {};
 	int err = 0;
+	unsigned int flags;
 
 	if (bo->resource->mem_type == I915_PL_SYSTEM || obj->ttm.backup)
 		return 0;
@@ -65,7 +66,14 @@ static int i915_ttm_backup(struct i915_gem_apply_to_region *apply,
 	if (obj->flags & I915_BO_ALLOC_PM_VOLATILE)
 		return 0;
 
-	backup = i915_gem_object_create_shmem(i915, obj->base.size);
+	flags = 0;
+	if (i915_gem_object_needs_ccs_pages(obj)) {
+		drm_err(&i915->drm,
+			"Pinned userspace object, forcing space for CCS\n");
+		flags = I915_BO_ALLOC_CCS;
+	}
+	backup = i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_SMEM],
+					       obj->base.size, 0, flags);
 	if (IS_ERR(backup))
 		return PTR_ERR(backup);
 
-- 
2.38.1