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 35struct 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#ifdef CONFIG_DRM_I915_DEBUG_GEM_ONCE 42#define __GEM_BUG(cond) BUG() 43#else 44#define __GEM_BUG(cond) \ 45 WARN(1, "%s:%d GEM_BUG_ON(%s)\n", __func__, __LINE__, __stringify(cond)) 46#endif 47 48#define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ 49 GEM_TRACE_ERR("%s:%d GEM_BUG_ON(%s)\n", \ 50 __func__, __LINE__, __stringify(condition)); \ 51 GEM_TRACE_DUMP(); \ 52 __GEM_BUG(condition); \ 53 } \ 54 } while(0) 55#define GEM_WARN_ON(expr) WARN_ON(expr) 56 57#define GEM_DEBUG_DECL(var) var 58#define GEM_DEBUG_EXEC(expr) expr 59#define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr) 60#define GEM_DEBUG_WARN_ON(expr) GEM_WARN_ON(expr) 61 62#else 63 64#define GEM_SHOW_DEBUG() (0) 65 66#define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) 67#define GEM_WARN_ON(expr) ({ unlikely(!!(expr)); }) 68 69#define GEM_DEBUG_DECL(var) 70#define GEM_DEBUG_EXEC(expr) do { } while (0) 71#define GEM_DEBUG_BUG_ON(expr) 72#define GEM_DEBUG_WARN_ON(expr) ({ BUILD_BUG_ON_INVALID(expr); 0; }) 73#endif 74 75#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) 76#define GEM_TRACE(...) trace_printk(__VA_ARGS__) 77#define GEM_TRACE_ERR(...) do { \ 78 pr_err(__VA_ARGS__); \ 79 trace_printk(__VA_ARGS__); \ 80} while (0) 81#define GEM_TRACE_DUMP() \ 82 do { ftrace_dump(DUMP_ALL); __add_taint_for_CI(TAINT_WARN); } while (0) 83#define GEM_TRACE_DUMP_ON(expr) \ 84 do { if (expr) GEM_TRACE_DUMP(); } while (0) 85#else 86#define GEM_TRACE(...) do { } while (0) 87#define GEM_TRACE_ERR(...) do { } while (0) 88#define GEM_TRACE_DUMP() do { } while (0) 89#define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) 90#endif 91 92#define I915_GEM_IDLE_TIMEOUT (HZ / 5) 93 94static inline void tasklet_lock(struct tasklet_struct *t) 95{ 96 while (!tasklet_trylock(t)) 97 cpu_relax(); 98} 99 100static inline bool tasklet_is_locked(const struct tasklet_struct *t) 101{ 102 return test_bit(TASKLET_STATE_RUN, &t->state); 103} 104 105static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) 106{ 107 if (!atomic_fetch_inc(&t->count)) 108 tasklet_unlock_spin_wait(t); 109} 110 111static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) 112{ 113 return !atomic_read(&t->count); 114} 115 116static inline bool __tasklet_enable(struct tasklet_struct *t) 117{ 118 return atomic_dec_and_test(&t->count); 119} 120 121static inline bool __tasklet_is_scheduled(struct tasklet_struct *t) 122{ 123 return test_bit(TASKLET_STATE_SCHED, &t->state); 124} 125 126#endif /* __I915_GEM_H__ */ 127