drm/amdkfd: add events IOCTL set definitions

- AMDKFD_IOC_CREATE_EVENT:
Creates a new event of a specified type

- AMDKFD_IOC_DESTROY_EVENT:
Destroys an existing event

- AMDKFD_IOC_SET_EVENT:
Signal an existing event

- AMDKFD_IOC_RESET_EVENT:
Reset an existing event

- AMDKFD_IOC_WAIT_EVENTS:
Wait on event(s) until they are signaled

v2:

- Move the limit of the signal events to kfd_ioctl.h so it
can be used by userspace

v3:
- Change all bool fields in struct kfd_memory_exception_failure
to uint32_t

Signed-off-by: Andrew Lewycky <[e-mail]>
Signed-off-by: Oded Gabbay <[e-mail]>

drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

···
 	return 0;
 }
 
+static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	return -ENODEV;
+}
+
+static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	return -ENODEV;
+}
+
+static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	return -ENODEV;
+}
+
+static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	return -ENODEV;
+}
+
+static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	return -ENODEV;
+}
+
 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
 	[_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
 
···
 
 	AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
 			kfd_ioctl_update_queue, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
+			kfd_ioctl_create_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
+			kfd_ioctl_destroy_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
+			kfd_ioctl_set_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
+			kfd_ioctl_reset_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
+			kfd_ioctl_wait_events, 0),
 };
 
 #define AMDKFD_CORE_IOCTL_COUNT	ARRAY_SIZE(amdkfd_ioctls)

include/uapi/linux/kfd_ioctl.h

···
 #include <linux/ioctl.h>
 
 #define KFD_IOCTL_MAJOR_VERSION 1
-#define KFD_IOCTL_MINOR_VERSION 0
+#define KFD_IOCTL_MINOR_VERSION 1
 
 struct kfd_ioctl_get_version_args {
 	uint32_t major_version;	/* from KFD */
···
 	uint32_t pad;
 };
 
+/* Matching HSA_EVENTTYPE */
+#define KFD_IOC_EVENT_SIGNAL			0
+#define KFD_IOC_EVENT_NODECHANGE		1
+#define KFD_IOC_EVENT_DEVICESTATECHANGE		2
+#define KFD_IOC_EVENT_HW_EXCEPTION		3
+#define KFD_IOC_EVENT_SYSTEM_EVENT		4
+#define KFD_IOC_EVENT_DEBUG_EVENT		5
+#define KFD_IOC_EVENT_PROFILE_EVENT		6
+#define KFD_IOC_EVENT_QUEUE_EVENT		7
+#define KFD_IOC_EVENT_MEMORY			8
+
+#define KFD_IOC_WAIT_RESULT_COMPLETE		0
+#define KFD_IOC_WAIT_RESULT_TIMEOUT		1
+#define KFD_IOC_WAIT_RESULT_FAIL		2
+
+#define KFD_SIGNAL_EVENT_LIMIT			256
+
+struct kfd_ioctl_create_event_args {
+	uint64_t event_page_offset;	/* from KFD */
+	uint32_t event_trigger_data;	/* from KFD - signal events only */
+	uint32_t event_type;		/* to KFD */
+	uint32_t auto_reset;		/* to KFD */
+	uint32_t node_id;		/* to KFD - only valid for certain
+							event types */
+	uint32_t event_id;		/* from KFD */
+	uint32_t event_slot_index;	/* from KFD */
+};
+
+struct kfd_ioctl_destroy_event_args {
+	uint32_t event_id;		/* to KFD */
+	uint32_t pad;
+};
+
+struct kfd_ioctl_set_event_args {
+	uint32_t event_id;		/* to KFD */
+	uint32_t pad;
+};
+
+struct kfd_ioctl_reset_event_args {
+	uint32_t event_id;		/* to KFD */
+	uint32_t pad;
+};
+
+struct kfd_memory_exception_failure {
+	uint32_t NotPresent;	/* Page not present or supervisor privilege */
+	uint32_t ReadOnly;	/* Write access to a read-only page */
+	uint32_t NoExecute;	/* Execute access to a page marked NX */
+	uint32_t pad;
+};
+
+/* memory exception data*/
+struct kfd_hsa_memory_exception_data {
+	struct kfd_memory_exception_failure failure;
+	uint64_t va;
+	uint32_t gpu_id;
+	uint32_t pad;
+};
+
+/* Event data*/
+struct kfd_event_data {
+	union {
+		struct kfd_hsa_memory_exception_data memory_exception_data;
+	};				/* From KFD */
+	uint64_t kfd_event_data_ext;	/* pointer to an extension structure
+					   for future exception types */
+	uint32_t event_id;		/* to KFD */
+	uint32_t pad;
+};
+
+struct kfd_ioctl_wait_events_args {
+	uint64_t events_ptr;		/* to KFD */
+	uint32_t num_events;		/* to KFD */
+	uint32_t wait_for_all;		/* to KFD */
+	uint32_t timeout;		/* to KFD */
+	uint32_t wait_result;		/* from KFD */
+};
+
 #define AMDKFD_IOCTL_BASE 'K'
 #define AMDKFD_IO(nr)			_IO(AMDKFD_IOCTL_BASE, nr)
 #define AMDKFD_IOR(nr, type)		_IOR(AMDKFD_IOCTL_BASE, nr, type)
···
 #define AMDKFD_IOC_UPDATE_QUEUE			\
 		AMDKFD_IOW(0x07, struct kfd_ioctl_update_queue_args)
 
+#define AMDKFD_IOC_CREATE_EVENT			\
+		AMDKFD_IOWR(0x08, struct kfd_ioctl_create_event_args)
+
+#define AMDKFD_IOC_DESTROY_EVENT		\
+		AMDKFD_IOW(0x09, struct kfd_ioctl_destroy_event_args)
+
+#define AMDKFD_IOC_SET_EVENT			\
+		AMDKFD_IOW(0x0A, struct kfd_ioctl_set_event_args)
+
+#define AMDKFD_IOC_RESET_EVENT			\
+		AMDKFD_IOW(0x0B, struct kfd_ioctl_reset_event_args)
+
+#define AMDKFD_IOC_WAIT_EVENTS			\
+		AMDKFD_IOWR(0x0C, struct kfd_ioctl_wait_events_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x08
+#define AMDKFD_COMMAND_END		0x0D
 
 #endif