tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright © 2016 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25#include "i915_drv.h"
26
27static int __i915_gem_timeline_init(struct drm_i915_private *i915,
28 struct i915_gem_timeline *timeline,
29 const char *name,
30 struct lock_class_key *lockclass,
31 const char *lockname)
32{
33 unsigned int i;
34 u64 fences;
35
36 lockdep_assert_held(&i915->drm.struct_mutex);
37
38 timeline->i915 = i915;
39 timeline->name = kstrdup(name ?: "[kernel]", GFP_KERNEL);
40 if (!timeline->name)
41 return -ENOMEM;
42
43 list_add(&timeline->link, &i915->gt.timelines);
44
45 /* Called during early_init before we know how many engines there are */
46 fences = dma_fence_context_alloc(ARRAY_SIZE(timeline->engine));
47 for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) {
48 struct intel_timeline *tl = &timeline->engine[i];
49
50 tl->fence_context = fences++;
51 tl->common = timeline;
52#ifdef CONFIG_DEBUG_SPINLOCK
53 __raw_spin_lock_init(&tl->lock.rlock, lockname, lockclass);
54#else
55 spin_lock_init(&tl->lock);
56#endif
57 init_request_active(&tl->last_request, NULL);
58 INIT_LIST_HEAD(&tl->requests);
59 }
60
61 return 0;
62}
63
64int i915_gem_timeline_init(struct drm_i915_private *i915,
65 struct i915_gem_timeline *timeline,
66 const char *name)
67{
68 static struct lock_class_key class;
69
70 return __i915_gem_timeline_init(i915, timeline, name,
71 &class, "&timeline->lock");
72}
73
74int i915_gem_timeline_init__global(struct drm_i915_private *i915)
75{
76 static struct lock_class_key class;
77
78 return __i915_gem_timeline_init(i915,
79 &i915->gt.global_timeline,
80 "[execution]",
81 &class, "&global_timeline->lock");
82}
83
84void i915_gem_timeline_fini(struct i915_gem_timeline *timeline)
85{
86 int i;
87
88 lockdep_assert_held(&timeline->i915->drm.struct_mutex);
89
90 for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) {
91 struct intel_timeline *tl = &timeline->engine[i];
92
93 GEM_BUG_ON(!list_empty(&tl->requests));
94 }
95
96 list_del(&timeline->link);
97 kfree(timeline->name);
98}