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 #include "i915_utils.h" 34 35 struct drm_i915_private; 36 37 #ifdef CONFIG_DRM_I915_DEBUG_GEM 38 39 #define GEM_SHOW_DEBUG() drm_debug_enabled(DRM_UT_DRIVER) 40 41 #define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ 42 GEM_TRACE_ERR("%s:%d GEM_BUG_ON(%s)\n", \ 43 __func__, __LINE__, __stringify(condition)); \ 44 GEM_TRACE_DUMP(); \ 45 BUG(); \ 46 } \ 47 } while(0) 48 #define GEM_WARN_ON(expr) WARN_ON(expr) 49 50 #define GEM_DEBUG_DECL(var) var 51 #define GEM_DEBUG_EXEC(expr) expr 52 #define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr) 53 #define GEM_DEBUG_WARN_ON(expr) GEM_WARN_ON(expr) 54 55 #else 56 57 #define GEM_SHOW_DEBUG() (0) 58 59 #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) 60 #define GEM_WARN_ON(expr) ({ unlikely(!!(expr)); }) 61 62 #define GEM_DEBUG_DECL(var) 63 #define GEM_DEBUG_EXEC(expr) do { } while (0) 64 #define GEM_DEBUG_BUG_ON(expr) 65 #define GEM_DEBUG_WARN_ON(expr) ({ BUILD_BUG_ON_INVALID(expr); 0; }) 66 #endif 67 68 #if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) 69 #define GEM_TRACE(...) trace_printk(__VA_ARGS__) 70 #define GEM_TRACE_ERR(...) do { \ 71 pr_err(__VA_ARGS__); \ 72 trace_printk(__VA_ARGS__); \ 73 } while (0) 74 #define GEM_TRACE_DUMP() \ 75 do { ftrace_dump(DUMP_ALL); add_taint_for_CI(TAINT_WARN); } while (0) 76 #define GEM_TRACE_DUMP_ON(expr) \ 77 do { if (expr) GEM_TRACE_DUMP(); } while (0) 78 #else 79 #define GEM_TRACE(...) do { } while (0) 80 #define GEM_TRACE_ERR(...) do { } while (0) 81 #define GEM_TRACE_DUMP() do { } while (0) 82 #define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) 83 #endif 84 85 #define I915_GEM_IDLE_TIMEOUT (HZ / 5) 86 87 static inline void tasklet_lock(struct tasklet_struct *t) 88 { 89 while (!tasklet_trylock(t)) 90 cpu_relax(); 91 } 92 93 static inline bool tasklet_is_locked(const struct tasklet_struct *t) 94 { 95 return test_bit(TASKLET_STATE_RUN, &t->state); 96 } 97 98 static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) 99 { 100 if (!atomic_fetch_inc(&t->count)) 101 tasklet_unlock_wait(t); 102 } 103 104 static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) 105 { 106 return !atomic_read(&t->count); 107 } 108 109 static inline bool __tasklet_enable(struct tasklet_struct *t) 110 { 111 return atomic_dec_and_test(&t->count); 112 } 113 114 static inline bool __tasklet_is_scheduled(struct tasklet_struct *t) 115 { 116 return test_bit(TASKLET_STATE_SCHED, &t->state); 117 } 118 119 #endif /* __I915_GEM_H__ */ 120