drm/amdpgu: add common functions for BACO feature in PP (v2)

V2: squash in crash fix for non-register commands (Alex)

Signed-off-by: Jim Qu <Jim.Qu@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/powerplay/hwmgr/Makefile

@@ -35,7 +35,7 @@ HARDWARE_MGR = hwmgr.o processpptables.o \
 		vega12_thermal.o \
 		pp_overdriver.o smu_helper.o \
 		vega20_processpptables.o vega20_hwmgr.o vega20_powertune.o \
-		vega20_thermal.o
+		vega20_thermal.o common_baco.o
 
 AMD_PP_HWMGR = $(addprefix $(AMD_PP_PATH)/hwmgr/,$(HARDWARE_MGR))
 

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

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2018 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 "common_baco.h"
+
+
+static bool baco_wait_register(struct pp_hwmgr *hwmgr, u32 reg, u32 mask, u32 value)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	u32 timeout = 5000, data;
+
+	do {
+		msleep(1);
+		data = RREG32(reg);
+		timeout--;
+	} while (value != (data & mask) && (timeout != 0));
+
+	if (timeout == 0)
+		return false;
+
+	return true;
+}
+
+static bool baco_cmd_handler(struct pp_hwmgr *hwmgr, u32 command, u32 reg, u32 mask,
+			        u32 shift, u32 value, u32 timeout)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	u32 data;
+	bool ret = true;
+
+	switch (command) {
+	case CMD_WRITE:
+		WREG32(reg, value << shift);
+		break;
+	case CMD_READMODIFYWRITE:
+		data = RREG32(reg);
+		data = (data & (~mask)) | (value << shift);
+		WREG32(reg, data);
+		break;
+	case CMD_WAITFOR:
+		ret = baco_wait_register(hwmgr, reg, mask, value);
+		break;
+	case CMD_DELAY_MS:
+		if (timeout)
+			/* Delay in milli Seconds */
+			msleep(timeout);
+		break;
+	case CMD_DELAY_US:
+		if (timeout)
+			/* Delay in micro Seconds */
+			udelay(timeout);
+		break;
+
+	default:
+		dev_warn(adev->dev, "Invalid BACO command.\n");
+		ret = false;
+	}
+
+	return ret;
+}
+
+bool soc15_baco_program_registers(struct pp_hwmgr *hwmgr,
+				 const struct soc15_baco_cmd_entry *entry,
+				 const u32 array_size)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	u32 i, reg = 0;
+
+	for (i = 0; i < array_size; i++) {
+		if ((entry[i].cmd == CMD_WRITE) ||
+		    (entry[i].cmd == CMD_READMODIFYWRITE) ||
+		    (entry[i].cmd == CMD_WAITFOR))
+			reg = adev->reg_offset[entry[i].hwip][entry[i].inst][entry[i].seg]
+				+ entry[i].reg_offset;
+		if (!baco_cmd_handler(hwmgr, entry[i].cmd, reg, entry[i].mask,
+				     entry[i].shift, entry[i].val, entry[i].timeout))
+			return false;
+	}
+
+	return true;
+}

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2018 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 __COMMON_BOCO_H__
+#define __COMMON_BOCO_H__
+#include "hwmgr.h"
+
+
+enum baco_cmd_type {
+	CMD_WRITE = 0,
+	CMD_READMODIFYWRITE,
+	CMD_WAITFOR,
+	CMD_DELAY_MS,
+	CMD_DELAY_US,
+};
+
+struct soc15_baco_cmd_entry {
+	enum baco_cmd_type cmd;
+	uint32_t 	hwip;
+	uint32_t 	inst;
+	uint32_t 	seg;
+	uint32_t 	reg_offset;
+	uint32_t     	mask;
+	uint32_t     	shift;
+	uint32_t     	timeout;
+	uint32_t     	val;
+};
+extern bool soc15_baco_program_registers(struct pp_hwmgr *hwmgr,
+					const struct soc15_baco_cmd_entry *entry,
+					const u32 array_size);
+#endif