drm/amdgpu/athub2: enable athub2 clock gating

Enable athub2 clock gating and light sleep
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -135,6 +135,10 @@ amdgpu-y += \
 	amdgpu_vcn.o \
 	vcn_v1_0.o
 
+# add ATHUB block
+amdgpu-y += \
+	athub_v2_0.o
+
 # add amdkfd interfaces
 amdgpu-y += amdgpu_amdkfd.o
 

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

@@ -64,6 +64,9 @@ static const struct cg_flag_name clocks[] = {
 	{AMD_CG_SUPPORT_DRM_LS, "Digital Right Management Light Sleep"},
 	{AMD_CG_SUPPORT_ROM_MGCG, "Rom Medium Grain Clock Gating"},
 	{AMD_CG_SUPPORT_DF_MGCG, "Data Fabric Medium Grain Clock Gating"},
+
+	{AMD_CG_SUPPORT_ATHUB_MGCG, "Address Translation Hub Medium Grain Clock Gating"},
+	{AMD_CG_SUPPORT_ATHUB_LS, "Address Translation Hub Light Sleep"},
 	{0, NULL},
 };
 

drivers/gpu/drm/amd/amdgpu/athub_v2_0.c

+/*
+ * 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.
+ *
+ */
+
+#include "amdgpu.h"
+#include "athub_v2_0.h"
+
+#include "athub/athub_2_0_0_offset.h"
+#include "athub/athub_2_0_0_sh_mask.h"
+#include "athub/athub_2_0_0_default.h"
+#include "navi10_enum.h"
+
+#include "soc15_common.h"
+
+static void
+athub_v2_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
+					    bool enable)
+{
+	uint32_t def, data;
+
+	def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
+
+	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
+		data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
+	else
+		data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
+
+	if (def != data)
+		WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
+}
+
+static void
+athub_v2_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
+					   bool enable)
+{
+	uint32_t def, data;
+
+	def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
+
+	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
+	    (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS))
+		data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
+	else
+		data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
+
+	if (def != data)
+		WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
+}
+
+int athub_v2_0_set_clockgating(struct amdgpu_device *adev,
+			       enum amd_clockgating_state state)
+{
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
+	switch (adev->asic_type) {
+	case CHIP_NAVI10:
+		athub_v2_0_update_medium_grain_clock_gating(adev,
+				state == AMD_CG_STATE_GATE ? true : false);
+		athub_v2_0_update_medium_grain_light_sleep(adev,
+				state == AMD_CG_STATE_GATE ? true : false);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+void athub_v2_0_get_clockgating(struct amdgpu_device *adev, u32 *flags)
+{
+	int data;
+
+	/* AMD_CG_SUPPORT_ATHUB_MGCG */
+	data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
+	if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
+		*flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
+
+	/* AMD_CG_SUPPORT_ATHUB_LS */
+	if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
+		*flags |= AMD_CG_SUPPORT_ATHUB_LS;
+}

drivers/gpu/drm/amd/amdgpu/athub_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 __ATHUB_V2_0_H__
+#define __ATHUB_V2_0_H__
+
+int athub_v2_0_set_clockgating(struct amdgpu_device *adev,
+			       enum amd_clockgating_state state);
+void athub_v2_0_get_clockgating(struct amdgpu_device *adev, u32 *flags);
+
+#endif

drivers/gpu/drm/amd/include/amd_shared.h

@@ -96,6 +96,8 @@ enum amd_powergating_state {
 #define AMD_CG_SUPPORT_HDP_DS			(1 << 25)
 #define AMD_CG_SUPPORT_HDP_SD			(1 << 26)
 #define AMD_CG_SUPPORT_IH_CG			(1 << 27)
+#define AMD_CG_SUPPORT_ATHUB_LS			(1 << 28)
+#define AMD_CG_SUPPORT_ATHUB_MGCG		(1 << 29)
 /* PG flags */
 #define AMD_PG_SUPPORT_GFX_PG			(1 << 0)
 #define AMD_PG_SUPPORT_GFX_SMG			(1 << 1)