linux_dsm_epyc7002/drivers/gpu/drm/i915/selftests/mock_timeline.c
Chris Wilson 3ef7114982 drm/i915: Introduce i915_timeline.mutex
A simple mutex used for guarding the flow of requests in and out of the
timeline. In the short-term, it will be used only to guard the addition
of requests into the timeline, taken on alloc and released on commit so
that only one caller can construct a request into the timeline
(important as the seqno and ring pointers must be serialised). This will
be used by observers to ensure that the seqno/hwsp is stable. Later,
when we have reduced retiring to only operate on a single timeline at a
time, we can then use the mutex as the sole guard required for retiring.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190301110547.14758-2-chris@chris-wilson.co.uk
2019-03-01 14:54:46 +00:00

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C

/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2017-2018 Intel Corporation
*/
#include "../i915_timeline.h"
#include "mock_timeline.h"
void mock_timeline_init(struct i915_timeline *timeline, u64 context)
{
timeline->i915 = NULL;
timeline->fence_context = context;
spin_lock_init(&timeline->lock);
mutex_init(&timeline->mutex);
INIT_ACTIVE_REQUEST(&timeline->barrier);
INIT_ACTIVE_REQUEST(&timeline->last_request);
INIT_LIST_HEAD(&timeline->requests);
i915_syncmap_init(&timeline->sync);
INIT_LIST_HEAD(&timeline->link);
}
void mock_timeline_fini(struct i915_timeline *timeline)
{
i915_syncmap_free(&timeline->sync);
}