Commit 497db7ea authored by Rajneesh Bhardwaj's avatar Rajneesh Bhardwaj Committed by Alex Deucher
Browse files

drm/amdgpu: Check APU supports true APP mode 



On GPXIP 9.4.3 APU, in no carveout mode there is no real vram heap and
could be emulated by the driver over the interleaved NUMA system memory
and the APU could also  be in the carveout mode during early development
stage or otherwise for debugging purpose so introduce a new member in
amdgpu_gmc to figure out whether the APU is in the native mode as per
the production configuration. AMD_IS_APU cannot be used for Accelerated
Processing Platform APUs as it might be used in a different context on
previous generations or on small APUs.

Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Tested-by: default avatarGraham Sider <graham.sider@amd.com>
Signed-off-by: default avatarRajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent eaae4bee

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

+1 −0
Original line number Diff line number Diff line
@@ -251,6 +251,7 @@ struct amdgpu_gmc { 
	uint64_t		last_fault:AMDGPU_GMC_FAULT_RING_ORDER;



	bool tmz_enabled;

	bool is_app_apu;



	const struct amdgpu_gmc_funcs	*gmc_funcs;

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

+14 −0
Original line number Diff line number Diff line
@@ -1442,6 +1442,20 @@ static int gmc_v9_0_early_init(void *handle) 
			adev->smuio.funcs->is_host_gpu_xgmi_supported(adev);

	}



	if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 3)) {

		enum amdgpu_pkg_type pkg_type =

			adev->smuio.funcs->get_pkg_type(adev);

		/* On GFXIP 9.4.3. APU, there is no physical VRAM domain present

		 * and the APU, can be in used two possible modes:

		 *  - carveout mode

		 *  - native APU mode

		 * "is_app_apu" can be used to identify the APU in the native

		 * mode.

		 */

		adev->gmc.is_app_apu = (pkg_type == AMDGPU_PKG_TYPE_APU &&

					!pci_resource_len(adev->pdev, 0));

	}



	gmc_v9_0_set_gmc_funcs(adev);

	gmc_v9_0_set_irq_funcs(adev);

	gmc_v9_0_set_umc_funcs(adev);