drm/amd/powerplay: add new smu ip block

This patch add amdgpu_smu ip block skeleton as placeholder.
We plan use new smu ip block from Vega20.

Signed-off-by: Huang Rui <ray.huang@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

@@ -83,6 +83,7 @@
 #include "amdgpu_gem.h"
 #include "amdgpu_doorbell.h"
 #include "amdgpu_amdkfd.h"
+#include "amdgpu_smu.h"
 
 #define MAX_GPU_INSTANCE		16
 
@@ -842,6 +843,9 @@ struct amdgpu_device {
 	struct amd_powerplay		powerplay;
 	bool				pp_force_state_enabled;
 
+	/* smu */
+	struct smu_context		smu;
+
 	/* dpm */
 	struct amdgpu_pm		pm;
 	u32				cg_flags;

drivers/gpu/drm/amd/powerplay/Makefile

@@ -35,7 +35,7 @@ AMD_POWERPLAY = $(addsuffix /Makefile,$(addprefix $(FULL_AMD_PATH)/powerplay/,$(
 
 include $(AMD_POWERPLAY)
 
-POWER_MGR = amd_powerplay.o
+POWER_MGR = amd_powerplay.o amdgpu_smu.o
 
 AMD_PP_POWER = $(addprefix $(AMD_PP_PATH)/,$(POWER_MGR))
 

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -0,0 +1,166 @@
+/*
+ * 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 "pp_debug.h"
+#include <linux/firmware.h>
+#include <drm/drmP.h>
+#include "amdgpu.h"
+#include "amdgpu_smu.h"
+#include "soc15_common.h"
+
+static int smu_set_funcs(struct amdgpu_device *adev)
+{
+	return 0;
+}
+
+static int smu_early_init(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	struct smu_context *smu = &adev->smu;
+	int ret;
+
+	ret = smu_set_funcs(adev);
+	if (ret)
+		return ret;
+
+	smu->adev = adev;
+	mutex_init(&smu->mutex);
+
+	return 0;
+}
+
+static int smu_sw_init(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	struct smu_context *smu = &adev->smu;
+	int ret;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	ret = smu_init_microcode(smu);
+	if (ret) {
+		pr_err("Failed to load smu firmware!\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int smu_sw_fini(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int smu_hw_init(void *handle)
+{
+	int ret;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	struct smu_context *smu = &adev->smu;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	mutex_lock(&smu->mutex);
+
+	/* TODO */
+
+	mutex_unlock(&smu->mutex);
+
+	pr_info("SMU is initialized successfully!\n");
+
+	return 0;
+}
+
+static int smu_hw_fini(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	struct smu_context *smu = &adev->smu;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int smu_suspend(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int smu_resume(void *handle)
+{
+	int ret;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	struct smu_context *smu = &adev->smu;
+
+	if (adev->asic_type < CHIP_VEGA20)
+		return -EINVAL;
+
+	mutex_lock(&smu->mutex);
+
+	/* TODO */
+
+	mutex_unlock(&smu->mutex);
+
+	return 0;
+}
+
+static int smu_set_clockgating_state(void *handle,
+				     enum amd_clockgating_state state)
+{
+	return 0;
+}
+
+static int smu_set_powergating_state(void *handle,
+				     enum amd_powergating_state state)
+{
+	return 0;
+}
+
+const struct amd_ip_funcs smu_ip_funcs = {
+	.name = "smu",
+	.early_init = smu_early_init,
+	.late_init = NULL,
+	.sw_init = smu_sw_init,
+	.sw_fini = smu_sw_fini,
+	.hw_init = smu_hw_init,
+	.hw_fini = smu_hw_fini,
+	.suspend = smu_suspend,
+	.resume = smu_resume,
+	.is_idle = NULL,
+	.check_soft_reset = NULL,
+	.wait_for_idle = NULL,
+	.soft_reset = NULL,
+	.set_clockgating_state = smu_set_clockgating_state,
+	.set_powergating_state = smu_set_powergating_state,
+};

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

@@ -0,0 +1,45 @@
+/*
+ * 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 __AMDGPU_SMU_H__
+#define __AMDGPU_SMU_H__
+
+#include "amdgpu.h"
+
+struct smu_context
+{
+	struct amdgpu_device            *adev;
+
+	const struct smu_funcs		*funcs;
+	struct mutex			mutex;
+};
+
+struct smu_funcs
+{
+	int (*init_microcode)(struct smu_context *smu);
+};
+
+#define smu_init_microcode(smu) \
+	((smu)->funcs->init_microcode ? (smu)->funcs->init_microcode((smu)) : 0)
+
+extern const struct amd_ip_funcs smu_ip_funcs;
+
+#endif