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
38 struct 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
tasklet_lock(struct tasklet_struct * t)90 static inline void tasklet_lock(struct tasklet_struct *t)
91 {
92 while (!tasklet_trylock(t))
93 cpu_relax();
94 }
95
96 #ifndef __NetBSD__
97
tasklet_is_locked(const struct tasklet_struct * t)98 static inline bool tasklet_is_locked(const struct tasklet_struct *t)
99 {
100 return test_bit(TASKLET_STATE_RUN, &t->state);
101 }
102
__tasklet_disable_sync_once(struct tasklet_struct * t)103 static 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
__tasklet_is_enabled(const struct tasklet_struct * t)109 static inline bool __tasklet_is_enabled(const struct tasklet_struct *t)
110 {
111 return !atomic_read(&t->count);
112 }
113
__tasklet_enable(struct tasklet_struct * t)114 static inline bool __tasklet_enable(struct tasklet_struct *t)
115 {
116 return atomic_dec_and_test(&t->count);
117 }
118
__tasklet_is_scheduled(struct tasklet_struct * t)119 static 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