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058179e72e
Replace sampling the engine state every so often with a periodic heartbeat request to measure the health of an engine. This is coupled with the forced-preemption to allow long running requests to survive so long as they do not block other users. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Jon Bloomfield <jon.bloomfield@intel.com> Reviewed-by: Jon Bloomfield <jon.bloomfield@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191023133108.21401-5-chris@chris-wilson.co.uk
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2018 Intel Corporation
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*/
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#ifndef _I915_PRIOLIST_TYPES_H_
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#define _I915_PRIOLIST_TYPES_H_
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include <uapi/drm/i915_drm.h>
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enum {
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I915_PRIORITY_MIN = I915_CONTEXT_MIN_USER_PRIORITY - 1,
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I915_PRIORITY_NORMAL = I915_CONTEXT_DEFAULT_PRIORITY,
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I915_PRIORITY_MAX = I915_CONTEXT_MAX_USER_PRIORITY + 1,
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/* A preemptive pulse used to monitor the health of each engine */
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I915_PRIORITY_HEARTBEAT,
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/* Interactive workload, scheduled for immediate pageflipping */
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I915_PRIORITY_DISPLAY,
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};
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#define I915_USER_PRIORITY_SHIFT 2
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#define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT)
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#define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT)
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#define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1)
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#define I915_PRIORITY_WAIT ((u8)BIT(0))
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#define I915_PRIORITY_NOSEMAPHORE ((u8)BIT(1))
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/* Smallest priority value that cannot be bumped. */
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#define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK)
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/*
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* Requests containing performance queries must not be preempted by
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* another context. They get scheduled with their default priority and
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* once they reach the execlist ports we ensure that they stick on the
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* HW until finished by pretending that they have maximum priority,
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* i.e. nothing can have higher priority and force us to usurp the
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* active request.
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*/
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#define I915_PRIORITY_UNPREEMPTABLE INT_MAX
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#define I915_PRIORITY_BARRIER INT_MAX
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#define __NO_PREEMPTION (I915_PRIORITY_WAIT)
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struct i915_priolist {
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struct list_head requests[I915_PRIORITY_COUNT];
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struct rb_node node;
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unsigned long used;
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int priority;
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};
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#endif /* _I915_PRIOLIST_TYPES_H_ */
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