drm/i915/doc: Update parallel submit doc to point to i915_drm.h

Update parallel submit doc to point to i915_drm.h

Signed-off-by: Matthew Brost <[e-mail]>
Reviewed-by: John Harrison <[e-mail]>
Signed-off-by: John Harrison <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/gpu/rfc/i915_parallel_execbuf.h

···
-/* SPDX-License-Identifier: MIT */
-/*
- * Copyright © 2021 Intel Corporation
- */
-
-#define I915_CONTEXT_ENGINES_EXT_PARALLEL_SUBMIT 2 /* see i915_context_engines_parallel_submit */
-
-/**
- * struct drm_i915_context_engines_parallel_submit - Configure engine for
- * parallel submission.
- *
- * Setup a slot in the context engine map to allow multiple BBs to be submitted
- * in a single execbuf IOCTL. Those BBs will then be scheduled to run on the GPU
- * in parallel. Multiple hardware contexts are created internally in the i915
- * run these BBs. Once a slot is configured for N BBs only N BBs can be
- * submitted in each execbuf IOCTL and this is implicit behavior e.g. The user
- * doesn't tell the execbuf IOCTL there are N BBs, the execbuf IOCTL knows how
- * many BBs there are based on the slot's configuration. The N BBs are the last
- * N buffer objects or first N if I915_EXEC_BATCH_FIRST is set.
- *
- * The default placement behavior is to create implicit bonds between each
- * context if each context maps to more than 1 physical engine (e.g. context is
- * a virtual engine). Also we only allow contexts of same engine class and these
- * contexts must be in logically contiguous order. Examples of the placement
- * behavior described below. Lastly, the default is to not allow BBs to
- * preempted mid BB rather insert coordinated preemption on all hardware
- * contexts between each set of BBs. Flags may be added in the future to change
- * both of these default behaviors.
- *
- * Returns -EINVAL if hardware context placement configuration is invalid or if
- * the placement configuration isn't supported on the platform / submission
- * interface.
- * Returns -ENODEV if extension isn't supported on the platform / submission
- * interface.
- *
- * .. code-block:: none
- *
- *	Example 1 pseudo code:
- *	CS[X] = generic engine of same class, logical instance X
- *	INVALID = I915_ENGINE_CLASS_INVALID, I915_ENGINE_CLASS_INVALID_NONE
- *	set_engines(INVALID)
- *	set_parallel(engine_index=0, width=2, num_siblings=1,
- *		     engines=CS[0],CS[1])
- *
- *	Results in the following valid placement:
- *	CS[0], CS[1]
- *
- *	Example 2 pseudo code:
- *	CS[X] = generic engine of same class, logical instance X
- *	INVALID = I915_ENGINE_CLASS_INVALID, I915_ENGINE_CLASS_INVALID_NONE
- *	set_engines(INVALID)
- *	set_parallel(engine_index=0, width=2, num_siblings=2,
- *		     engines=CS[0],CS[2],CS[1],CS[3])
- *
- *	Results in the following valid placements:
- *	CS[0], CS[1]
- *	CS[2], CS[3]
- *
- *	This can also be thought of as 2 virtual engines described by 2-D array
- *	in the engines the field with bonds placed between each index of the
- *	virtual engines. e.g. CS[0] is bonded to CS[1], CS[2] is bonded to
- *	CS[3].
- *	VE[0] = CS[0], CS[2]
- *	VE[1] = CS[1], CS[3]
- *
- *	Example 3 pseudo code:
- *	CS[X] = generic engine of same class, logical instance X
- *	INVALID = I915_ENGINE_CLASS_INVALID, I915_ENGINE_CLASS_INVALID_NONE
- *	set_engines(INVALID)
- *	set_parallel(engine_index=0, width=2, num_siblings=2,
- *		     engines=CS[0],CS[1],CS[1],CS[3])
- *
- *	Results in the following valid and invalid placements:
- *	CS[0], CS[1]
- *	CS[1], CS[3] - Not logical contiguous, return -EINVAL
- */
-struct drm_i915_context_engines_parallel_submit {
-	/**
-	 * @base: base user extension.
-	 */
-	struct i915_user_extension base;
-
-	/**
-	 * @engine_index: slot for parallel engine
-	 */
-	__u16 engine_index;
-
-	/**
-	 * @width: number of contexts per parallel engine
-	 */
-	__u16 width;
-
-	/**
-	 * @num_siblings: number of siblings per context
-	 */
-	__u16 num_siblings;
-
-	/**
-	 * @mbz16: reserved for future use; must be zero
-	 */
-	__u16 mbz16;
-
-	/**
-	 * @flags: all undefined flags must be zero, currently not defined flags
-	 */
-	__u64 flags;
-
-	/**
-	 * @mbz64: reserved for future use; must be zero
-	 */
-	__u64 mbz64[3];
-
-	/**
-	 * @engines: 2-d array of engine instances to configure parallel engine
-	 *
-	 * length = width (i) * num_siblings (j)
-	 * index = j + i * num_siblings
-	 */
-	struct i915_engine_class_instance engines[0];
-
-} __packed;
-

Documentation/gpu/rfc/i915_scheduler.rst

···
 drm_i915_context_engines_parallel_submit to the uAPI to implement this
 extension.
 
-.. kernel-doc:: Documentation/gpu/rfc/i915_parallel_execbuf.h
-        :functions: drm_i915_context_engines_parallel_submit
+.. kernel-doc:: include/uapi/drm/i915_drm.h
+        :functions: i915_context_engines_parallel_submit
 
 Extend execbuf2 IOCTL to support submitting N BBs in a single IOCTL
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