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 #include <drm/drm_drv.h> 32 33 struct drm_i915_private; 34 35 #ifdef CONFIG_DRM_I915_DEBUG_GEM 36 37 #define GEM_SHOW_DEBUG() (drm_debug & DRM_UT_DRIVER) 38 39 #define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ 40 GEM_TRACE_ERR("%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 #define GEM_DEBUG_WARN_ON(expr) GEM_WARN_ON(expr) 51 52 #else 53 54 #define GEM_SHOW_DEBUG() (0) 55 56 #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) 57 #define GEM_WARN_ON(expr) ({ unlikely(!!(expr)); }) 58 59 #define GEM_DEBUG_DECL(var) 60 #define GEM_DEBUG_EXEC(expr) do { } while (0) 61 #define GEM_DEBUG_BUG_ON(expr) 62 #define GEM_DEBUG_WARN_ON(expr) ({ BUILD_BUG_ON_INVALID(expr); 0; }) 63 #endif 64 65 #if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) 66 #define GEM_TRACE(...) trace_printk(__VA_ARGS__) 67 #define GEM_TRACE_ERR(...) do { \ 68 pr_err(__VA_ARGS__); \ 69 trace_printk(__VA_ARGS__); \ 70 } while (0) 71 #define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL) 72 #define GEM_TRACE_DUMP_ON(expr) \ 73 do { if (expr) ftrace_dump(DUMP_ALL); } while (0) 74 #else 75 #define GEM_TRACE(...) do { } while (0) 76 #define GEM_TRACE_ERR(...) do { } while (0) 77 #define GEM_TRACE_DUMP() do { } while (0) 78 #define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) 79 #endif 80 81 #define I915_GEM_IDLE_TIMEOUT (HZ / 5) 82 83 static inline void tasklet_lock(struct tasklet_struct *t) 84 { 85 while (!tasklet_trylock(t)) 86 cpu_relax(); 87 } 88 89 static inline bool tasklet_is_locked(const struct tasklet_struct *t) 90 { 91 return test_bit(TASKLET_STATE_RUN, &t->state); 92 } 93 94 static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) 95 { 96 if (!atomic_fetch_inc(&t->count)) 97 tasklet_unlock_wait(t); 98 } 99 100 static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) 101 { 102 return !atomic_read(&t->count); 103 } 104 105 static inline bool __tasklet_enable(struct tasklet_struct *t) 106 { 107 return atomic_dec_and_test(&t->count); 108 } 109 110 static inline bool __tasklet_is_scheduled(struct tasklet_struct *t) 111 { 112 return test_bit(TASKLET_STATE_SCHED, &t->state); 113 } 114 115 #endif /* __I915_GEM_H__ */ 116