[PATCH 09/22] drm/i915/ttm: use pfn range for mappable lmem

[Matthew Auld]

On devices with non-mappable lmem ensure we allocate the pages within
the mappable portion if we require CPU access.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 6 +++++-
 drivers/gpu/drm/i915/intel_region_ttm.c | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index d4e42b30f725..e60b677ecd54 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -129,8 +129,12 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
 	if (flags & I915_BO_ALLOC_CONTIGUOUS)
 		place->flags |= TTM_PL_FLAG_CONTIGUOUS;
 	if (mr->io_size && mr->io_size < mr->total) {
-		if (flags & I915_BO_ALLOC_TOPDOWN)
+		if (flags & I915_BO_ALLOC_TOPDOWN) {
 			place->flags |= TTM_PL_FLAG_TOPDOWN;
+		} else {
+			place->fpfn = 0;
+			place->lpfn = mr->io_size >> PAGE_SHIFT;
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c
index c44b520054ca..282802aed174 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.c
+++ b/drivers/gpu/drm/i915/intel_region_ttm.c
@@ -202,8 +202,12 @@ intel_region_ttm_resource_alloc(struct intel_memory_region *mem,
 	if (flags & I915_BO_ALLOC_CONTIGUOUS)
 		place.flags |= TTM_PL_FLAG_CONTIGUOUS;
 	if (mem->io_size && mem->io_size < mem->total) {
-		if (flags & I915_BO_ALLOC_TOPDOWN)
+		if (flags & I915_BO_ALLOC_TOPDOWN) {
 			place.flags |= TTM_PL_FLAG_TOPDOWN;
+		} else {
+			place.fpfn = 0;
+			place.lpfn = mem->io_size >> PAGE_SHIFT;
+		}
 	}
 
 	mock_bo.base.size = size;
-- 
2.31.1