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 #if 0 40 timeline->name = kstrdup(name ?: "[kernel]", GFP_KERNEL); 41 #else 42 timeline->name = kstrdup(name ?: "[kernel]", M_DRM); 43 #endif 44 if (!timeline->name) 45 return -ENOMEM; 46 47 list_add(&timeline->link, &i915->gt.timelines); 48 49 /* Called during early_init before we know how many engines there are */ 50 fences = dma_fence_context_alloc(ARRAY_SIZE(timeline->engine)); 51 for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) { 52 struct intel_timeline *tl = &timeline->engine[i]; 53 54 tl->fence_context = fences++; 55 tl->common = timeline; 56 #ifdef CONFIG_DEBUG_SPINLOCK 57 __raw_spin_lock_init(&tl->lock.rlock, lockname, lockclass); 58 #else 59 lockinit(&tl->lock, "i9tll", 0, 0); 60 #endif 61 init_request_active(&tl->last_request, NULL); 62 INIT_LIST_HEAD(&tl->requests); 63 } 64 65 return 0; 66 } 67 68 int i915_gem_timeline_init(struct drm_i915_private *i915, 69 struct i915_gem_timeline *timeline, 70 const char *name) 71 { 72 static struct lock_class_key class; 73 74 return __i915_gem_timeline_init(i915, timeline, name, 75 &class, "&timeline->lock"); 76 } 77 78 int i915_gem_timeline_init__global(struct drm_i915_private *i915) 79 { 80 static struct lock_class_key class; 81 82 return __i915_gem_timeline_init(i915, 83 &i915->gt.global_timeline, 84 "[execution]", 85 &class, "&global_timeline->lock"); 86 } 87 88 void i915_gem_timeline_fini(struct i915_gem_timeline *tl) 89 { 90 lockdep_assert_held(&tl->i915->drm.struct_mutex); 91 92 list_del(&tl->link); 93 kfree(tl->name); 94 } 95