drm/amdgpu: use cursor functions in amdgpu_bo_in_cpu_visible_vram

One of the last remaining uses of drm_mm_node.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_object.h

@@ -30,6 +30,8 @@
 
 #include <drm/amdgpu_drm.h>
 #include "amdgpu.h"
+#include "amdgpu_res_cursor.h"
+
 #ifdef CONFIG_MMU_NOTIFIER
 #include <linux/mmu_notifier.h>
 #endif
@@ -215,18 +217,19 @@ static inline u64 amdgpu_bo_mmap_offset(struct amdgpu_bo *bo)
 static inline bool amdgpu_bo_in_cpu_visible_vram(struct amdgpu_bo *bo)
 {
 	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	unsigned fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
-	struct drm_mm_node *node = bo->tbo.mem.mm_node;
-	unsigned long pages_left;
+	struct amdgpu_res_cursor cursor;
 
 	if (bo->tbo.mem.mem_type != TTM_PL_VRAM)
 		return false;
 
-	for (pages_left = bo->tbo.mem.num_pages; pages_left;
-	     pages_left -= node->size, node++)
-		if (node->start < fpfn)
+	amdgpu_res_first(&bo->tbo.mem, 0, amdgpu_bo_size(bo), &cursor);
+	while (cursor.remaining) {
+		if (cursor.start < adev->gmc.visible_vram_size)
 			return true;
 
+		amdgpu_res_next(&cursor, cursor.size);
+	}
+
 	return false;
 }