drm/amdgpu: move keep stolen memory check into gmc core

Rather than leaving this as a gmc v9 specific hack.
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -215,6 +215,7 @@ struct amdgpu_gmc {
 	bool			prt_warning;
 	uint64_t		stolen_vga_size;
 	struct amdgpu_bo	*stolen_vga_memory;
+	bool			keep_stolen_vga_memory;
 	uint32_t		sdpif_register;
 	/* apertures */
 	u64			shared_aperture_start;

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -2042,8 +2042,10 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 void amdgpu_ttm_late_init(struct amdgpu_device *adev)
 {
 	void *stolen_vga_buf;
+
 	/* return the VGA stolen memory (if any) back to VRAM */
-	amdgpu_bo_free_kernel(&adev->gmc.stolen_vga_memory, NULL, &stolen_vga_buf);
+	if (!adev->gmc.keep_stolen_vga_memory)
+		amdgpu_bo_free_kernel(&adev->gmc.stolen_vga_memory, NULL, &stolen_vga_buf);
 }
 
 /**
@@ -2051,10 +2053,15 @@ void amdgpu_ttm_late_init(struct amdgpu_device *adev)
  */
 void amdgpu_ttm_fini(struct amdgpu_device *adev)
 {
+	void *stolen_vga_buf;
+
 	if (!adev->mman.initialized)
 		return;
 
 	amdgpu_ttm_training_reserve_vram_fini(adev);
+	/* return the stolen vga memory back to VRAM */
+	if (adev->gmc.keep_stolen_vga_memory)
+		amdgpu_bo_free_kernel(&adev->gmc.stolen_vga_memory, NULL, &stolen_vga_buf);
 	/* return the IP Discovery TMR memory back to VRAM */
 	amdgpu_bo_free_kernel(&adev->discovery_memory, NULL, NULL);
 	amdgpu_ttm_fw_reserve_vram_fini(adev);

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -932,8 +932,7 @@ static int gmc_v9_0_late_init(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int r;
 
-	if (!gmc_v9_0_keep_stolen_memory(adev))
-		amdgpu_bo_late_init(adev);
+	amdgpu_bo_late_init(adev);
 
 	r = amdgpu_gmc_allocate_vm_inv_eng(adev);
 	if (r)
@@ -1076,7 +1075,7 @@ static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
 	 * TODO Remove once GART corruption is resolved
 	 * Check related code in gmc_v9_0_sw_fini
 	 * */
-	if (gmc_v9_0_keep_stolen_memory(adev))
+	if (adev->gmc.keep_stolen_vga_memory)
 		return AMDGPU_VBIOS_VGA_ALLOCATION;
 
 	d1vga_control = RREG32_SOC15(DCE, 0, mmD1VGA_CONTROL);
@@ -1243,6 +1242,7 @@ static int gmc_v9_0_sw_init(void *handle)
 	if (r)
 		return r;
 
+	adev->gmc.keep_stolen_vga_memory = gmc_v9_0_keep_stolen_memory(adev);
 	adev->gmc.stolen_vga_size = gmc_v9_0_get_vbios_fb_size(adev);
 
 	/* Memory manager */
@@ -1275,15 +1275,10 @@ static int gmc_v9_0_sw_init(void *handle)
 static int gmc_v9_0_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-	void *stolen_vga_buf;
 
 	amdgpu_gmc_ras_fini(adev);
 	amdgpu_gem_force_release(adev);
 	amdgpu_vm_manager_fini(adev);
-
-	if (gmc_v9_0_keep_stolen_memory(adev))
-		amdgpu_bo_free_kernel(&adev->gmc.stolen_vga_memory, NULL, &stolen_vga_buf);
-
 	amdgpu_gart_table_vram_free(adev);
 	amdgpu_bo_fini(adev);
 	amdgpu_gart_fini(adev);