drm/xe/uapi: Order sections

This patch doesn't modify any text or uapi entries themselves.
It only move things up and down aiming a better organization of the uAPI.

While fixing the documentation I noticed that query_engine_cs_cycles
was in the middle of the memory_region info. Then I noticed more
mismatches on the order when compared to the order of the IOCTL
and QUERY entries declaration. So this patch aims to bring some
order to the uAPI so it gets easier to read and the documentation
generated in the end is able to tell a consistent story.

Overall order:

1. IOCTL definition
2. Extension definition and helper structs
3. IOCTL's Query structs in the order of the Query's entries.
4. The rest of IOCTL structs in the order of IOCTL declaration.
5. uEvents

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Mateusz Naklicki <mateusz.naklicki@intel.com>
Signed-off-by: Francois Dugast <francois.dugast@intel.com>

Author: rodrigovivi

include/uapi/drm/xe_drm.h

@@ -12,19 +12,48 @@
 extern "C" {
 #endif
 
-/* Please note that modifications to all structs defined here are
+/*
+ * Please note that modifications to all structs defined here are
  * subject to backwards-compatibility constraints.
+ * Sections in this file are organized as follows:
+ *   1. IOCTL definition
+ *   2. Extension definition and helper structs
+ *   3. IOCTL's Query structs in the order of the Query's entries.
+ *   4. The rest of IOCTL structs in the order of IOCTL declaration.
+ *   5. uEvents
  */
 
-/**
- * DOC: uevent generated by xe on it's pci node.
+/*
+ * xe specific ioctls.
  *
- * DRM_XE_RESET_FAILED_UEVENT - Event is generated when attempt to reset gt
- * fails. The value supplied with the event is always "NEEDS_RESET".
- * Additional information supplied is tile id and gt id of the gt unit for
- * which reset has failed.
+ * The device specific ioctl range is [DRM_COMMAND_BASE, DRM_COMMAND_END) ie
+ * [0x40, 0xa0) (a0 is excluded). The numbers below are defined as offset
+ * against DRM_COMMAND_BASE and should be between [0x0, 0x60).
  */
-#define DRM_XE_RESET_FAILED_UEVENT "DEVICE_STATUS"
+#define DRM_XE_DEVICE_QUERY		0x00
+#define DRM_XE_GEM_CREATE		0x01
+#define DRM_XE_GEM_MMAP_OFFSET		0x02
+#define DRM_XE_VM_CREATE		0x03
+#define DRM_XE_VM_DESTROY		0x04
+#define DRM_XE_VM_BIND			0x05
+#define DRM_XE_EXEC_QUEUE_CREATE	0x06
+#define DRM_XE_EXEC_QUEUE_DESTROY	0x07
+#define DRM_XE_EXEC_QUEUE_GET_PROPERTY	0x08
+#define DRM_XE_EXEC			0x09
+#define DRM_XE_WAIT_USER_FENCE		0x0a
+/* Must be kept compact -- no holes */
+
+#define DRM_IOCTL_XE_DEVICE_QUERY		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_DEVICE_QUERY, struct drm_xe_device_query)
+#define DRM_IOCTL_XE_GEM_CREATE			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_GEM_CREATE, struct drm_xe_gem_create)
+#define DRM_IOCTL_XE_GEM_MMAP_OFFSET		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_GEM_MMAP_OFFSET, struct drm_xe_gem_mmap_offset)
+#define DRM_IOCTL_XE_VM_CREATE			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_VM_CREATE, struct drm_xe_vm_create)
+#define DRM_IOCTL_XE_VM_DESTROY			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_DESTROY, struct drm_xe_vm_destroy)
+#define DRM_IOCTL_XE_VM_BIND			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_BIND, struct drm_xe_vm_bind)
+#define DRM_IOCTL_XE_EXEC_QUEUE_CREATE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_CREATE, struct drm_xe_exec_queue_create)
+#define DRM_IOCTL_XE_EXEC_QUEUE_DESTROY		DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_DESTROY, struct drm_xe_exec_queue_destroy)
+#define DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY	DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_GET_PROPERTY, struct drm_xe_exec_queue_get_property)
+#define DRM_IOCTL_XE_EXEC			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC, struct drm_xe_exec)
+#define DRM_IOCTL_XE_WAIT_USER_FENCE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_WAIT_USER_FENCE, struct drm_xe_wait_user_fence)
 
 /**
  * struct drm_xe_user_extension - Base class for defining a chain of extensions
@@ -90,37 +119,25 @@ struct drm_xe_user_extension {
 	__u32 pad;
 };
 
-/*
- * xe specific ioctls.
- *
- * The device specific ioctl range is [DRM_COMMAND_BASE, DRM_COMMAND_END) ie
- * [0x40, 0xa0) (a0 is excluded). The numbers below are defined as offset
- * against DRM_COMMAND_BASE and should be between [0x0, 0x60).
+/**
+ * struct drm_xe_ext_set_property - XE set property extension
  */
-#define DRM_XE_DEVICE_QUERY		0x00
-#define DRM_XE_GEM_CREATE		0x01
-#define DRM_XE_GEM_MMAP_OFFSET		0x02
-#define DRM_XE_VM_CREATE		0x03
-#define DRM_XE_VM_DESTROY		0x04
-#define DRM_XE_VM_BIND			0x05
-#define DRM_XE_EXEC_QUEUE_CREATE	0x06
-#define DRM_XE_EXEC_QUEUE_DESTROY	0x07
-#define DRM_XE_EXEC_QUEUE_GET_PROPERTY	0x08
-#define DRM_XE_EXEC			0x09
-#define DRM_XE_WAIT_USER_FENCE		0x0a
-/* Must be kept compact -- no holes */
+struct drm_xe_ext_set_property {
+	/** @base: base user extension */
+	struct drm_xe_user_extension base;
 
-#define DRM_IOCTL_XE_DEVICE_QUERY		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_DEVICE_QUERY, struct drm_xe_device_query)
-#define DRM_IOCTL_XE_GEM_CREATE			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_GEM_CREATE, struct drm_xe_gem_create)
-#define DRM_IOCTL_XE_GEM_MMAP_OFFSET		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_GEM_MMAP_OFFSET, struct drm_xe_gem_mmap_offset)
-#define DRM_IOCTL_XE_VM_CREATE			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_VM_CREATE, struct drm_xe_vm_create)
-#define DRM_IOCTL_XE_VM_DESTROY			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_DESTROY, struct drm_xe_vm_destroy)
-#define DRM_IOCTL_XE_VM_BIND			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_BIND, struct drm_xe_vm_bind)
-#define DRM_IOCTL_XE_EXEC_QUEUE_CREATE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_CREATE, struct drm_xe_exec_queue_create)
-#define DRM_IOCTL_XE_EXEC_QUEUE_DESTROY		DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_DESTROY, struct drm_xe_exec_queue_destroy)
-#define DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY	DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_GET_PROPERTY, struct drm_xe_exec_queue_get_property)
-#define DRM_IOCTL_XE_EXEC			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC, struct drm_xe_exec)
-#define DRM_IOCTL_XE_WAIT_USER_FENCE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_WAIT_USER_FENCE, struct drm_xe_wait_user_fence)
+	/** @property: property to set */
+	__u32 property;
+
+	/** @pad: MBZ */
+	__u32 pad;
+
+	/** @value: property value */
+	__u64 value;
+
+	/** @reserved: Reserved */
+	__u64 reserved[2];
+};
 
 /**
  * struct drm_xe_engine_class_instance - instance of an engine class
@@ -274,57 +291,6 @@ struct drm_xe_mem_region {
 	__u64 reserved[6];
 };
 
-/**
- * struct drm_xe_query_engine_cycles - correlate CPU and GPU timestamps
- *
- * If a query is made with a struct drm_xe_device_query where .query is equal to
- * DRM_XE_DEVICE_QUERY_ENGINE_CYCLES, then the reply uses struct drm_xe_query_engine_cycles
- * in .data. struct drm_xe_query_engine_cycles is allocated by the user and
- * .data points to this allocated structure.
- *
- * The query returns the engine cycles, which along with GT's @reference_clock,
- * can be used to calculate the engine timestamp. In addition the
- * query returns a set of cpu timestamps that indicate when the command
- * streamer cycle count was captured.
- */
-struct drm_xe_query_engine_cycles {
-	/**
-	 * @eci: This is input by the user and is the engine for which command
-	 * streamer cycles is queried.
-	 */
-	struct drm_xe_engine_class_instance eci;
-
-	/**
-	 * @clockid: This is input by the user and is the reference clock id for
-	 * CPU timestamp. For definition, see clock_gettime(2) and
-	 * perf_event_open(2). Supported clock ids are CLOCK_MONOTONIC,
-	 * CLOCK_MONOTONIC_RAW, CLOCK_REALTIME, CLOCK_BOOTTIME, CLOCK_TAI.
-	 */
-	__s32 clockid;
-
-	/** @width: Width of the engine cycle counter in bits. */
-	__u32 width;
-
-	/**
-	 * @engine_cycles: Engine cycles as read from its register
-	 * at 0x358 offset.
-	 */
-	__u64 engine_cycles;
-
-	/**
-	 * @cpu_timestamp: CPU timestamp in ns. The timestamp is captured before
-	 * reading the engine_cycles register using the reference clockid set by the
-	 * user.
-	 */
-	__u64 cpu_timestamp;
-
-	/**
-	 * @cpu_delta: Time delta in ns captured around reading the lower dword
-	 * of the engine_cycles register.
-	 */
-	__u64 cpu_delta;
-};
-
 /**
  * struct drm_xe_query_mem_regions - describe memory regions
  *
@@ -482,6 +448,57 @@ struct drm_xe_query_topology_mask {
 	__u8 mask[];
 };
 
+/**
+ * struct drm_xe_query_engine_cycles - correlate CPU and GPU timestamps
+ *
+ * If a query is made with a struct drm_xe_device_query where .query is equal to
+ * DRM_XE_DEVICE_QUERY_ENGINE_CYCLES, then the reply uses struct drm_xe_query_engine_cycles
+ * in .data. struct drm_xe_query_engine_cycles is allocated by the user and
+ * .data points to this allocated structure.
+ *
+ * The query returns the engine cycles, which along with GT's @reference_clock,
+ * can be used to calculate the engine timestamp. In addition the
+ * query returns a set of cpu timestamps that indicate when the command
+ * streamer cycle count was captured.
+ */
+struct drm_xe_query_engine_cycles {
+	/**
+	 * @eci: This is input by the user and is the engine for which command
+	 * streamer cycles is queried.
+	 */
+	struct drm_xe_engine_class_instance eci;
+
+	/**
+	 * @clockid: This is input by the user and is the reference clock id for
+	 * CPU timestamp. For definition, see clock_gettime(2) and
+	 * perf_event_open(2). Supported clock ids are CLOCK_MONOTONIC,
+	 * CLOCK_MONOTONIC_RAW, CLOCK_REALTIME, CLOCK_BOOTTIME, CLOCK_TAI.
+	 */
+	__s32 clockid;
+
+	/** @width: Width of the engine cycle counter in bits. */
+	__u32 width;
+
+	/**
+	 * @engine_cycles: Engine cycles as read from its register
+	 * at 0x358 offset.
+	 */
+	__u64 engine_cycles;
+
+	/**
+	 * @cpu_timestamp: CPU timestamp in ns. The timestamp is captured before
+	 * reading the engine_cycles register using the reference clockid set by the
+	 * user.
+	 */
+	__u64 cpu_timestamp;
+
+	/**
+	 * @cpu_delta: Time delta in ns captured around reading the lower dword
+	 * of the engine_cycles register.
+	 */
+	__u64 cpu_delta;
+};
+
 /**
  * struct drm_xe_device_query - Input of &DRM_IOCTL_XE_DEVICE_QUERY - main
  * structure to query device information
@@ -668,26 +685,6 @@ struct drm_xe_gem_mmap_offset {
 	__u64 reserved[2];
 };
 
-/**
- * struct drm_xe_ext_set_property - XE set property extension
- */
-struct drm_xe_ext_set_property {
-	/** @base: base user extension */
-	struct drm_xe_user_extension base;
-
-	/** @property: property to set */
-	__u32 property;
-
-	/** @pad: MBZ */
-	__u32 pad;
-
-	/** @value: property value */
-	__u64 value;
-
-	/** @reserved: Reserved */
-	__u64 reserved[2];
-};
-
 /**
  * struct drm_xe_vm_create - Input of &DRM_IOCTL_XE_VM_CREATE
  *
@@ -976,6 +973,20 @@ struct drm_xe_exec_queue_create {
 	__u64 reserved[2];
 };
 
+/**
+ * struct drm_xe_exec_queue_destroy - Input of &DRM_IOCTL_XE_EXEC_QUEUE_DESTROY
+ */
+struct drm_xe_exec_queue_destroy {
+	/** @exec_queue_id: Exec queue ID */
+	__u32 exec_queue_id;
+
+	/** @pad: MBZ */
+	__u32 pad;
+
+	/** @reserved: Reserved */
+	__u64 reserved[2];
+};
+
 /**
  * struct drm_xe_exec_queue_get_property - Input of &DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY
  *
@@ -1000,20 +1011,6 @@ struct drm_xe_exec_queue_get_property {
 	__u64 reserved[2];
 };
 
-/**
- * struct drm_xe_exec_queue_destroy - Input of &DRM_IOCTL_XE_EXEC_QUEUE_DESTROY
- */
-struct drm_xe_exec_queue_destroy {
-	/** @exec_queue_id: Exec queue ID */
-	__u32 exec_queue_id;
-
-	/** @pad: MBZ */
-	__u32 pad;
-
-	/** @reserved: Reserved */
-	__u64 reserved[2];
-};
-
 /**
  * struct drm_xe_sync - sync object
  *
@@ -1180,6 +1177,17 @@ struct drm_xe_wait_user_fence {
 	/** @reserved: Reserved */
 	__u64 reserved[2];
 };
+
+/**
+ * DOC: uevent generated by xe on it's pci node.
+ *
+ * DRM_XE_RESET_FAILED_UEVENT - Event is generated when attempt to reset gt
+ * fails. The value supplied with the event is always "NEEDS_RESET".
+ * Additional information supplied is tile id and gt id of the gt unit for
+ * which reset has failed.
+ */
+#define DRM_XE_RESET_FAILED_UEVENT "DEVICE_STATUS"
+
 #if defined(__cplusplus)
 }
 #endif