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_H__ 26 #define __I915_GEM_H__ 27 28 #include <linux/bug.h> 29 #include <linux/interrupt.h> 30 31 struct drm_i915_private; 32 33 #ifdef CONFIG_DRM_I915_DEBUG_GEM 34 35 #define GEM_SHOW_DEBUG() (drm_debug & DRM_UT_DRIVER) 36 37 #define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ 38 pr_err("%s:%d GEM_BUG_ON(%s)\n", \ 39 __func__, __LINE__, __stringify(condition)); \ 40 GEM_TRACE("%s:%d GEM_BUG_ON(%s)\n", \ 41 __func__, __LINE__, __stringify(condition)); \ 42 BUG(); \ 43 } \ 44 } while(0) 45 #define GEM_WARN_ON(expr) WARN_ON(expr) 46 47 #define GEM_DEBUG_DECL(var) var 48 #define GEM_DEBUG_EXEC(expr) expr 49 #define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr) 50 51 #else 52 53 #define GEM_SHOW_DEBUG() (0) 54 55 #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) 56 #define GEM_WARN_ON(expr) (BUILD_BUG_ON_INVALID(expr), 0) 57 58 #define GEM_DEBUG_DECL(var) 59 #define GEM_DEBUG_EXEC(expr) do { } while (0) 60 #define GEM_DEBUG_BUG_ON(expr) 61 #endif 62 63 #if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) 64 #define GEM_TRACE(...) trace_printk(__VA_ARGS__) 65 #define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL) 66 #define GEM_TRACE_DUMP_ON(expr) \ 67 do { if (expr) ftrace_dump(DUMP_ALL); } while (0) 68 #else 69 #define GEM_TRACE(...) do { } while (0) 70 #define GEM_TRACE_DUMP() do { } while (0) 71 #define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) 72 #endif 73 74 #define I915_NUM_ENGINES 8 75 76 void i915_gem_park(struct drm_i915_private *i915); 77 void i915_gem_unpark(struct drm_i915_private *i915); 78 79 static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) 80 { 81 if (atomic_inc_return(&t->count) == 1) 82 tasklet_unlock_wait(t); 83 } 84 85 static inline void __tasklet_enable_sync_once(struct tasklet_struct *t) 86 { 87 if (atomic_dec_return(&t->count) == 0) 88 tasklet_kill(t); 89 } 90 91 static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) 92 { 93 return !atomic_read(&t->count); 94 } 95 96 #endif /* __I915_GEM_H__ */ 97