4 files changed, 175 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 741b68874e53..a0a5fd1788b5 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -179,9 +179,14 @@ amdgpu-y += \
 	smuio_v11_0_6.o \
 	smuio_v13_0.o
 
+# add reset block
+amdgpu-y += \
+	amdgpu_reset.o
+
 # add amdkfd interfaces
 amdgpu-y += amdgpu_amdkfd.o
 
+
 ifneq ($(CONFIG_HSA_AMD),)
 AMDKFD_PATH := ../amdkfd
 include $(FULL_AMD_PATH)/amdkfd/Makefile
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6434a15789f6..4b72fb32f22c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -270,6 +270,7 @@ struct amdgpu_bo_va_mapping;
 struct amdgpu_atif;
 struct kfd_vm_fault_info;
 struct amdgpu_hive_info;
+struct amdgpu_reset_control;
 
 enum amdgpu_cp_irq {
 	AMDGPU_CP_IRQ_GFX_ME0_PIPE0_EOP = 0,
@@ -588,6 +589,7 @@ struct amdgpu_allowed_register_entry {
 };
 
 enum amd_reset_method {
+	AMD_RESET_METHOD_NONE = -1,
 	AMD_RESET_METHOD_LEGACY = 0,
 	AMD_RESET_METHOD_MODE0,
 	AMD_RESET_METHOD_MODE1,
@@ -1073,6 +1075,7 @@ struct amdgpu_device {
 
 	bool                            in_pci_err_recovery;
 	struct pci_saved_state          *pci_state;
+	struct amdgpu_reset_control     *reset_cntl;
 };
 
 static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
new file mode 100644
index 000000000000..5bc94b8320ba
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2021 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_reset.h"
+#include "aldebaran.h"
+
+int amdgpu_reset_add_handler(struct amdgpu_reset_control *reset_ctl,
+			     struct amdgpu_reset_handler *handler)
+{
+	/* TODO: Check if handler exists? */
+	list_add_tail(&handler->handler_list, &reset_ctl->reset_handlers);
+	return 0;
+}
+
+int amdgpu_reset_init(struct amdgpu_device *adev)
+{
+	int ret = 0;
+
+	return ret;
+}
+
+int amdgpu_reset_fini(struct amdgpu_device *adev)
+{
+	int ret = 0;
+
+	return ret;
+}
+
+int amdgpu_reset_prepare_hwcontext(struct amdgpu_device *adev,
+				   struct amdgpu_reset_context *reset_context)
+{
+	struct amdgpu_reset_handler *reset_handler = NULL;
+
+	if (adev->reset_cntl && adev->reset_cntl->get_reset_handler)
+		reset_handler = adev->reset_cntl->get_reset_handler(
+			adev->reset_cntl, reset_context);
+	if (!reset_handler)
+		return -ENOSYS;
+
+	return reset_handler->prepare_hwcontext(adev->reset_cntl,
+						reset_context);
+}
+
+int amdgpu_reset_perform_reset(struct amdgpu_device *adev,
+			       struct amdgpu_reset_context *reset_context)
+{
+	int ret;
+	struct amdgpu_reset_handler *reset_handler = NULL;
+
+	if (adev->reset_cntl)
+		reset_handler = adev->reset_cntl->get_reset_handler(
+			adev->reset_cntl, reset_context);
+	if (!reset_handler)
+		return -ENOSYS;
+
+	ret = reset_handler->perform_reset(adev->reset_cntl, reset_context);
+	if (ret)
+		return ret;
+
+	return reset_handler->restore_hwcontext(adev->reset_cntl,
+						reset_context);
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
new file mode 100644
index 000000000000..dc84d871fe72
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2021 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 __AMDUGPU_RESET_H__
+#define __AMDGPU_RESET_H__
+
+#include "amdgpu.h"
+
+enum AMDGPU_RESET_FLAGS {
+
+	AMDGPU_NEED_FULL_RESET = 0,
+	AMDGPU_SKIP_HW_RESET = 1,
+};
+
+struct amdgpu_reset_context {
+	enum amd_reset_method method;
+	struct amdgpu_device *reset_req_dev;
+	struct amdgpu_job *job;
+	struct amdgpu_hive_info *hive;
+	unsigned long flags;
+};
+
+struct amdgpu_reset_handler {
+	enum amd_reset_method reset_method;
+	struct list_head handler_list;
+	int (*prepare_env)(struct amdgpu_reset_control *reset_ctl,
+			   struct amdgpu_reset_context *context);
+	int (*prepare_hwcontext)(struct amdgpu_reset_control *reset_ctl,
+				 struct amdgpu_reset_context *context);
+	int (*perform_reset)(struct amdgpu_reset_control *reset_ctl,
+			     struct amdgpu_reset_context *context);
+	int (*restore_hwcontext)(struct amdgpu_reset_control *reset_ctl,
+				 struct amdgpu_reset_context *context);
+	int (*restore_env)(struct amdgpu_reset_control *reset_ctl,
+			   struct amdgpu_reset_context *context);
+
+	int (*do_reset)(struct amdgpu_device *adev);
+};
+
+struct amdgpu_reset_control {
+	void *handle;
+	struct work_struct reset_work;
+	struct mutex reset_lock;
+	struct list_head reset_handlers;
+	atomic_t in_reset;
+	enum amd_reset_method active_reset;
+	struct amdgpu_reset_handler *(*get_reset_handler)(
+		struct amdgpu_reset_control *reset_ctl,
+		struct amdgpu_reset_context *context);
+	void (*async_reset)(struct work_struct *work);
+};
+
+int amdgpu_reset_init(struct amdgpu_device *adev);
+int amdgpu_reset_fini(struct amdgpu_device *adev);
+
+int amdgpu_reset_prepare_hwcontext(struct amdgpu_device *adev,
+				   struct amdgpu_reset_context *reset_context);
+
+int amdgpu_reset_perform_reset(struct amdgpu_device *adev,
+			       struct amdgpu_reset_context *reset_context);
+
+int amdgpu_reset_add_handler(struct amdgpu_reset_control *reset_ctl,
+			     struct amdgpu_reset_handler *handler);
+
+#endif