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