drm/amd/powerplay: apply Vega20 BACO workaround

Applied vdci flush workaround for Vega20 BACO.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -929,6 +929,7 @@ struct amdgpu_device {
 	/* counter of mapped memory through xgmi */
 	atomic_t			xgmi_map_counter;
 
+	bool                            in_baco_reset;
 };
 
 static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)

drivers/gpu/drm/amd/amdgpu/soc15.c

@@ -452,6 +452,8 @@ static int soc15_asic_baco_reset(struct amdgpu_device *adev)
 
 	dev_info(adev->dev, "GPU BACO reset\n");
 
+	adev->in_baco_reset = 1;
+
 	return 0;
 }
 

drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.c

@@ -27,6 +27,7 @@
 #include "vega20_inc.h"
 #include "vega20_ppsmc.h"
 #include "vega20_baco.h"
+#include "vega20_smumgr.h"
 
 
 
@@ -101,3 +102,14 @@ int vega20_baco_set_state(struct pp_hwmgr *hwmgr, enum BACO_STATE state)
 
 	return 0;
 }
+
+int vega20_baco_apply_vdci_flush_workaround(struct pp_hwmgr *hwmgr)
+{
+	int ret = 0;
+
+	ret = vega20_set_pptable_driver_address(hwmgr);
+	if (ret)
+		return ret;
+
+	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_BacoWorkAroundFlushVDCI);
+}

drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.h

@@ -28,5 +28,6 @@
 extern int vega20_baco_get_capability(struct pp_hwmgr *hwmgr, bool *cap);
 extern int vega20_baco_get_state(struct pp_hwmgr *hwmgr, enum BACO_STATE *state);
 extern int vega20_baco_set_state(struct pp_hwmgr *hwmgr, enum BACO_STATE state);
+extern int vega20_baco_apply_vdci_flush_workaround(struct pp_hwmgr *hwmgr);
 
 #endif

drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c

@@ -443,6 +443,7 @@ static int vega20_init_sclk_threshold(struct pp_hwmgr *hwmgr)
 
 static int vega20_setup_asic_task(struct pp_hwmgr *hwmgr)
 {
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
 	int ret = 0;
 
 	ret = vega20_init_sclk_threshold(hwmgr);
@@ -450,7 +451,15 @@ static int vega20_setup_asic_task(struct pp_hwmgr *hwmgr)
 			"Failed to init sclk threshold!",
 			return ret);
 
-	return 0;
+	if (adev->in_baco_reset) {
+		adev->in_baco_reset = 0;
+
+		ret = vega20_baco_apply_vdci_flush_workaround(hwmgr);
+		if (ret)
+			pr_err("Failed to apply vega20 baco workaround!\n");
+	}
+
+	return ret;
 }
 
 /*

drivers/gpu/drm/amd/powerplay/inc/vega20_ppsmc.h

@@ -119,7 +119,8 @@
 #define PPSMC_MSG_PrepareMp1ForShutdown          0x5A
 #define PPSMC_MSG_SetMGpuFanBoostLimitRpm        0x5D
 #define PPSMC_MSG_GetAVFSVoltageByDpm            0x5F
-#define PPSMC_Message_Count                      0x60
+#define PPSMC_MSG_BacoWorkAroundFlushVDCI        0x60
+#define PPSMC_Message_Count                      0x61
 
 typedef uint32_t PPSMC_Result;
 typedef uint32_t PPSMC_Msg;

drivers/gpu/drm/amd/powerplay/smumgr/vega20_smumgr.c

@@ -367,6 +367,26 @@ static int vega20_set_tools_address(struct pp_hwmgr *hwmgr)
 	return ret;
 }
 
+int vega20_set_pptable_driver_address(struct pp_hwmgr *hwmgr)
+{
+	struct vega20_smumgr *priv =
+			(struct vega20_smumgr *)(hwmgr->smu_backend);
+	int ret = 0;
+
+	PP_ASSERT_WITH_CODE((ret = vega20_send_msg_to_smc_with_parameter(hwmgr,
+			PPSMC_MSG_SetDriverDramAddrHigh,
+			upper_32_bits(priv->smu_tables.entry[TABLE_PPTABLE].mc_addr))) == 0,
+			"[SetPPtabeDriverAddress] Attempt to Set Dram Addr High Failed!",
+			return ret);
+	PP_ASSERT_WITH_CODE((ret = vega20_send_msg_to_smc_with_parameter(hwmgr,
+			PPSMC_MSG_SetDriverDramAddrLow,
+			lower_32_bits(priv->smu_tables.entry[TABLE_PPTABLE].mc_addr))) == 0,
+			"[SetPPtabeDriverAddress] Attempt to Set Dram Addr Low Failed!",
+			return ret);
+
+	return ret;
+}
+
 static int vega20_smu_init(struct pp_hwmgr *hwmgr)
 {
 	struct vega20_smumgr *priv;

drivers/gpu/drm/amd/powerplay/smumgr/vega20_smumgr.h

@@ -55,6 +55,7 @@ int vega20_set_activity_monitor_coeff(struct pp_hwmgr *hwmgr,
 		uint8_t *table, uint16_t workload_type);
 int vega20_get_activity_monitor_coeff(struct pp_hwmgr *hwmgr,
 		uint8_t *table, uint16_t workload_type);
+int vega20_set_pptable_driver_address(struct pp_hwmgr *hwmgr);
 
 #endif