[PATCH 3/4] drm/amdgpu/gmc: add a flag to disable AGP

[Alex Deucher]

Allows the driver to disable the AGP aperture when
it's not needed.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index c41321c456fe..ed9be37eca66 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -326,7 +326,7 @@ void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
 	const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
 	u64 size_af, size_bf;
 
-	if (amdgpu_sriov_vf(adev)) {
+	if (amdgpu_sriov_vf(adev) || mc->no_agp) {
 		mc->agp_start = 0xffffffffffff;
 		mc->agp_end = 0x0;
 		mc->agp_size = 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index caa15639d3d5..65641d7da212 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -340,6 +340,7 @@ struct amdgpu_gmc {
 
 	u64 noretry_flags;
 	enum amdgpu_gart_placement gart_placement;
+	bool no_agp;
 };
 
 #define amdgpu_gmc_flush_gpu_tlb(adev, vmid, vmhub, type) ((adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid), (vmhub), (type)))
-- 
2.41.0