[Why]
Enable 1:1 mapping between VRAM of a DRM node and a scatterlist node
[How]
Ensure construction of DRM node to not exceed specified limit
Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 20747d8b1135..21d18efca277 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -476,6 +476,9 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
for (i = 0; pages_left >= pages_per_node; ++i) {
unsigned long pages = rounddown_pow_of_two(pages_left);
+ /* Limit maximum size to 2GB due to SG table limitations */
+ pages = min(pages, (2UL << (30 - PAGE_SHIFT)));
+
r = drm_mm_insert_node_in_range(mm, &nodes[i], pages,
pages_per_node, 0,
place->fpfn, lpfn,
--
2.29.2
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