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422d7df4f0
To continue the onslaught of removing the assumption of a global execution ordering, another casualty is the engine->timeline. Without an actual timeline to track, it is overkill and we can replace it with a much less grand plain list. We still need a list of requests inflight, for the simple purpose of finding inflight requests (for retiring, resetting, preemption etc). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190614164606.15633-3-chris@chris-wilson.co.uk
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2016 Intel Corporation
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*/
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#ifndef __I915_TIMELINE_TYPES_H__
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#define __I915_TIMELINE_TYPES_H__
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#include <linux/list.h>
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#include <linux/kref.h>
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include "i915_active_types.h"
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struct drm_i915_private;
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struct i915_vma;
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struct i915_timeline_cacheline;
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struct i915_syncmap;
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struct i915_timeline {
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u64 fence_context;
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u32 seqno;
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struct mutex mutex; /* protects the flow of requests */
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unsigned int pin_count;
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const u32 *hwsp_seqno;
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struct i915_vma *hwsp_ggtt;
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u32 hwsp_offset;
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struct i915_timeline_cacheline *hwsp_cacheline;
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bool has_initial_breadcrumb;
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/**
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* List of breadcrumbs associated with GPU requests currently
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* outstanding.
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*/
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struct list_head requests;
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/* Contains an RCU guarded pointer to the last request. No reference is
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* held to the request, users must carefully acquire a reference to
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* the request using i915_active_request_get_request_rcu(), or hold the
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* struct_mutex.
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*/
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struct i915_active_request last_request;
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/**
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* We track the most recent seqno that we wait on in every context so
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* that we only have to emit a new await and dependency on a more
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* recent sync point. As the contexts may be executed out-of-order, we
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* have to track each individually and can not rely on an absolute
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* global_seqno. When we know that all tracked fences are completed
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* (i.e. when the driver is idle), we know that the syncmap is
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* redundant and we can discard it without loss of generality.
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*/
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struct i915_syncmap *sync;
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struct list_head link;
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struct drm_i915_private *i915;
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struct kref kref;
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};
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#endif /* __I915_TIMELINE_TYPES_H__ */
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