1/* $NetBSD: i915_gem.h,v 1.8 2023/08/08 06:59:40 mrg Exp $ */ 2 3/* 4 * Copyright �� 2016 Intel Corporation 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 23 * IN THE SOFTWARE. 24 * 25 */ 26 27#ifndef __I915_GEM_H__ 28#define __I915_GEM_H__ 29 30#include <linux/bug.h> 31#include <linux/interrupt.h> 32#include <linux/stringify.h> 33 34#include <drm/drm_drv.h> 35 36#include "i915_utils.h" 37 38struct drm_i915_private; 39 40#ifdef CONFIG_DRM_I915_DEBUG_GEM 41 42#define GEM_SHOW_DEBUG() drm_debug_enabled(DRM_UT_DRIVER) 43 44#define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ 45 GEM_TRACE_ERR("%s:%d GEM_BUG_ON(%s)\n", \ 46 __func__, __LINE__, __stringify(condition)); \ 47 GEM_TRACE_DUMP(); \ 48 BUG(); \ 49 } \ 50 } while(0) 51#define GEM_WARN_ON(expr) WARN_ON(expr) 52 53#define GEM_DEBUG_DECL(var) var 54#define GEM_DEBUG_EXEC(expr) expr 55#define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr) 56#define GEM_DEBUG_WARN_ON(expr) GEM_WARN_ON(expr) 57 58#else 59 60#define GEM_SHOW_DEBUG() (0) 61 62#define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) 63#define GEM_WARN_ON(expr) ({ unlikely(!!(expr)); }) 64 65#define GEM_DEBUG_DECL(var) 66#define GEM_DEBUG_EXEC(expr) do { } while (0) 67#define GEM_DEBUG_BUG_ON(expr) 68#define GEM_DEBUG_WARN_ON(expr) ({ BUILD_BUG_ON_INVALID(expr); 0; }) 69#endif 70 71#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) 72#define GEM_TRACE(...) trace_printk(__VA_ARGS__) 73#define GEM_TRACE_ERR(...) do { \ 74 pr_err(__VA_ARGS__); \ 75 trace_printk(__VA_ARGS__); \ 76} while (0) 77#define GEM_TRACE_DUMP() \ 78 do { ftrace_dump(DUMP_ALL); add_taint_for_CI(TAINT_WARN); } while (0) 79#define GEM_TRACE_DUMP_ON(expr) \ 80 do { if (expr) GEM_TRACE_DUMP(); } while (0) 81#else 82#define GEM_TRACE(...) do { } while (0) 83#define GEM_TRACE_ERR(...) do { } while (0) 84#define GEM_TRACE_DUMP() do { } while (0) 85#define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) 86#endif 87 88#define I915_GEM_IDLE_TIMEOUT (HZ / 5) 89 90static inline void tasklet_lock(struct tasklet_struct *t) 91{ 92 while (!tasklet_trylock(t)) 93 cpu_relax(); 94} 95 96#ifndef __NetBSD__ 97 98static inline bool tasklet_is_locked(const struct tasklet_struct *t) 99{ 100 return test_bit(TASKLET_STATE_RUN, &t->state); 101} 102 103static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) 104{ 105 if (!atomic_fetch_inc(&t->count)) 106 tasklet_unlock_wait(t); 107} 108 109static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) 110{ 111 return !atomic_read(&t->count); 112} 113 114static inline bool __tasklet_enable(struct tasklet_struct *t) 115{ 116 return atomic_dec_and_test(&t->count); 117} 118 119static inline bool __tasklet_is_scheduled(struct tasklet_struct *t) 120{ 121 return test_bit(TASKLET_STATE_SCHED, &t->state); 122} 123 124#endif 125 126#endif /* __I915_GEM_H__ */ 127