mirror of https://gitee.com/openkylin/linux.git
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/*
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* Copyright © 2016 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 "i915_drv.h"
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static int __i915_gem_timeline_init(struct drm_i915_private *i915,
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struct i915_gem_timeline *timeline,
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const char *name,
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struct lock_class_key *lockclass,
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const char *lockname)
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{
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unsigned int i;
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u64 fences;
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lockdep_assert_held(&i915->drm.struct_mutex);
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timeline->i915 = i915;
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timeline->name = kstrdup(name ?: "[kernel]", GFP_KERNEL);
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if (!timeline->name)
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return -ENOMEM;
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list_add(&timeline->link, &i915->gt.timelines);
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/* Called during early_init before we know how many engines there are */
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fences = dma_fence_context_alloc(ARRAY_SIZE(timeline->engine));
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for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) {
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struct intel_timeline *tl = &timeline->engine[i];
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tl->fence_context = fences++;
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tl->common = timeline;
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#ifdef CONFIG_DEBUG_SPINLOCK
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__raw_spin_lock_init(&tl->lock.rlock, lockname, lockclass);
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#else
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spin_lock_init(&tl->lock);
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#endif
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init_request_active(&tl->last_request, NULL);
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INIT_LIST_HEAD(&tl->requests);
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}
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return 0;
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}
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int i915_gem_timeline_init(struct drm_i915_private *i915,
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struct i915_gem_timeline *timeline,
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const char *name)
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{
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static struct lock_class_key class;
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return __i915_gem_timeline_init(i915, timeline, name,
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&class, "&timeline->lock");
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}
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int i915_gem_timeline_init__global(struct drm_i915_private *i915)
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{
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static struct lock_class_key class;
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return __i915_gem_timeline_init(i915,
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&i915->gt.global_timeline,
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"[execution]",
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&class, "&global_timeline->lock");
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}
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void i915_gem_timeline_fini(struct i915_gem_timeline *timeline)
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{
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int i;
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lockdep_assert_held(&timeline->i915->drm.struct_mutex);
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for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) {
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struct intel_timeline *tl = &timeline->engine[i];
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GEM_BUG_ON(!list_empty(&tl->requests));
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}
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list_del(&timeline->link);
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kfree(timeline->name);
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}
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