drivers/gpu/drm/i915/i915_gem_timeline.c

   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
  27 static 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
  64 int 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
  74 int 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
  84 void 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 }