drivers/gpu/drm/i915/i915_gem.h

   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 struct drm_i915_private;
  32
  33 #ifdef CONFIG_DRM_I915_DEBUG_GEM
  34
  35 #define GEM_SHOW_DEBUG() (drm_debug & DRM_UT_DRIVER)
  36
  37 #define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \
  38                 pr_err("%s:%d GEM_BUG_ON(%s)\n", \
  39                        __func__, __LINE__, __stringify(condition)); \
  40                 GEM_TRACE("%s:%d GEM_BUG_ON(%s)\n", \
  41                           __func__, __LINE__, __stringify(condition)); \
  42                 BUG(); \
  43                 } \
  44         } while(0)
  45 #define GEM_WARN_ON(expr) WARN_ON(expr)
  46
  47 #define GEM_DEBUG_DECL(var) var
  48 #define GEM_DEBUG_EXEC(expr) expr
  49 #define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr)
  50
  51 #else
  52
  53 #define GEM_SHOW_DEBUG() (0)
  54
  55 #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
  56 #define GEM_WARN_ON(expr) (BUILD_BUG_ON_INVALID(expr), 0)
  57
  58 #define GEM_DEBUG_DECL(var)
  59 #define GEM_DEBUG_EXEC(expr) do { } while (0)
  60 #define GEM_DEBUG_BUG_ON(expr)
  61 #endif
  62
  63 #if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM)
  64 #define GEM_TRACE(...) trace_printk(__VA_ARGS__)
  65 #define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL)
  66 #define GEM_TRACE_DUMP_ON(expr) \
  67         do { if (expr) ftrace_dump(DUMP_ALL); } while (0)
  68 #else
  69 #define GEM_TRACE(...) do { } while (0)
  70 #define GEM_TRACE_DUMP() do { } while (0)
  71 #define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr)
  72 #endif
  73
  74 #define I915_NUM_ENGINES 8
  75
  76 void i915_gem_park(struct drm_i915_private *i915);
  77 void i915_gem_unpark(struct drm_i915_private *i915);
  78
  79 static inline void __tasklet_disable_sync_once(struct tasklet_struct *t)
  80 {
  81         if (atomic_inc_return(&t->count) == 1)
  82                 tasklet_unlock_wait(t);
  83 }
  84
  85 static inline void __tasklet_enable_sync_once(struct tasklet_struct *t)
  86 {
  87         if (atomic_dec_return(&t->count) == 0)
  88                 tasklet_kill(t);
  89 }
  90
  91 static inline bool __tasklet_is_enabled(const struct tasklet_struct *t)
  92 {
  93         return !atomic_read(&t->count);
  94 }
  95
  96 #endif /* __I915_GEM_H__ */