79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
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/*
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* Copyright © 2017 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "lib_sw_fence.h"
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/* Small library of different fence types useful for writing tests */
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static int __i915_sw_fence_call
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nop_fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
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{
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return NOTIFY_DONE;
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}
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void __onstack_fence_init(struct i915_sw_fence *fence,
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const char *name,
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struct lock_class_key *key)
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{
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debug_fence_init_onstack(fence);
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__init_waitqueue_head(&fence->wait, name, key);
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atomic_set(&fence->pending, 1);
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fence->flags = (unsigned long)nop_fence_notify;
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}
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void onstack_fence_fini(struct i915_sw_fence *fence)
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{
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i915_sw_fence_commit(fence);
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i915_sw_fence_fini(fence);
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}
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static void timed_fence_wake(struct timer_list *t)
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{
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struct timed_fence *tf = from_timer(tf, t, timer);
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i915_sw_fence_commit(&tf->fence);
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}
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void timed_fence_init(struct timed_fence *tf, unsigned long expires)
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{
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onstack_fence_init(&tf->fence);
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timer_setup_on_stack(&tf->timer, timed_fence_wake, 0);
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if (time_after(expires, jiffies))
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mod_timer(&tf->timer, expires);
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else
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i915_sw_fence_commit(&tf->fence);
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}
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void timed_fence_fini(struct timed_fence *tf)
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{
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if (del_timer_sync(&tf->timer))
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i915_sw_fence_commit(&tf->fence);
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destroy_timer_on_stack(&tf->timer);
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i915_sw_fence_fini(&tf->fence);
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}
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