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 #ifndef I915_GEM_TIMELINE_H 26 #define I915_GEM_TIMELINE_H 27 28 #include <linux/list.h> 29 30 #include "i915_gem_request.h" 31 32 struct i915_gem_timeline; 33 34 struct intel_timeline { 35 u64 fence_context; 36 u32 last_submitted_seqno; 37 38 spinlock_t lock; 39 40 /** 41 * List of breadcrumbs associated with GPU requests currently 42 * outstanding. 43 */ 44 struct list_head requests; 45 46 /* Contains an RCU guarded pointer to the last request. No reference is 47 * held to the request, users must carefully acquire a reference to 48 * the request using i915_gem_active_get_request_rcu(), or hold the 49 * struct_mutex. 50 */ 51 struct i915_gem_active last_request; 52 u32 sync_seqno[I915_NUM_ENGINES]; 53 54 struct i915_gem_timeline *common; 55 }; 56 57 struct i915_gem_timeline { 58 struct list_head link; 59 atomic_t next_seqno; 60 61 struct drm_i915_private *i915; 62 const char *name; 63 64 struct intel_timeline engine[I915_NUM_ENGINES]; 65 }; 66 67 int i915_gem_timeline_init(struct drm_i915_private *i915, 68 struct i915_gem_timeline *tl, 69 const char *name); 70 int i915_gem_timeline_init__global(struct drm_i915_private *i915); 71 void i915_gem_timeline_fini(struct i915_gem_timeline *tl); 72 73 #endif 74