drm/amdgpu: add gfxhub v2.0 block for navi10 (v4)

gfxhub is the memory controller hub for gfx and sdma.

v1: add place holder and initial basic functions (Ray)
v2: replace the refernce to legacy mc structure with gmc structure
    remove the direct use of gart.table_addr (Hawking)
v3: switch to use amdgpu_gmc_pd_addr (Hawking)
v4: squash in updates (Alex)
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -75,7 +75,8 @@ amdgpu-y += \
 amdgpu-y += \
 	gmc_v7_0.o \
 	gmc_v8_0.o \
-	gfxhub_v1_0.o mmhub_v1_0.o gmc_v9_0.o gfxhub_v1_1.o
+	gfxhub_v1_0.o mmhub_v1_0.o gmc_v9_0.o gfxhub_v1_1.o \
+	gfxhub_v2_0.o
 
 # add IH block
 amdgpu-y += \

drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h

+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __GFXHUB_V2_0_H__
+#define __GFXHUB_V2_0_H__
+
+u64 gfxhub_v2_0_get_fb_location(struct amdgpu_device *adev);
+int gfxhub_v2_0_gart_enable(struct amdgpu_device *adev);
+void gfxhub_v2_0_gart_disable(struct amdgpu_device *adev);
+void gfxhub_v2_0_set_fault_enable_default(struct amdgpu_device *adev,
+					  bool value);
+void gfxhub_v2_0_init(struct amdgpu_device *adev);
+u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev);
+
+#endif