diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h new file mode 100644 index 000000000..a4cad3f15 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_gem.h @@ -0,0 +1,131 @@ +/* + * Copyright © 2016 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + */ + +#ifndef __I915_GEM_H__ +#define __I915_GEM_H__ + +#include <linux/bug.h> +#include <linux/interrupt.h> + +#include <drm/drm_drv.h> + +#include "i915_utils.h" + +struct drm_i915_private; + +#ifdef CONFIG_DRM_I915_DEBUG_GEM + +#define GEM_SHOW_DEBUG() drm_debug_enabled(DRM_UT_DRIVER) + +#define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \ + GEM_TRACE_ERR("%s:%d GEM_BUG_ON(%s)\n", \ + __func__, __LINE__, __stringify(condition)); \ + GEM_TRACE_DUMP(); \ + BUG(); \ + } \ + } while(0) +#define GEM_WARN_ON(expr) WARN_ON(expr) + +#define GEM_DEBUG_DECL(var) var +#define GEM_DEBUG_EXEC(expr) expr +#define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr) +#define GEM_DEBUG_WARN_ON(expr) GEM_WARN_ON(expr) + +#else + +#define GEM_SHOW_DEBUG() (0) + +#define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) +#define GEM_WARN_ON(expr) ({ unlikely(!!(expr)); }) + +#define GEM_DEBUG_DECL(var) +#define GEM_DEBUG_EXEC(expr) do { } while (0) +#define GEM_DEBUG_BUG_ON(expr) +#define GEM_DEBUG_WARN_ON(expr) ({ BUILD_BUG_ON_INVALID(expr); 0; }) +#endif + +#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM) +#define GEM_TRACE(...) trace_printk(__VA_ARGS__) +#define GEM_TRACE_ERR(...) do { \ + pr_err(__VA_ARGS__); \ + trace_printk(__VA_ARGS__); \ +} while (0) +#define GEM_TRACE_DUMP() \ + do { ftrace_dump(DUMP_ALL); __add_taint_for_CI(TAINT_WARN); } while (0) +#define GEM_TRACE_DUMP_ON(expr) \ + do { if (expr) GEM_TRACE_DUMP(); } while (0) +#else +#define GEM_TRACE(...) do { } while (0) +#define GEM_TRACE_ERR(...) do { } while (0) +#define GEM_TRACE_DUMP() do { } while (0) +#define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr) +#endif + +#define I915_GEM_IDLE_TIMEOUT (HZ / 5) + +static inline void tasklet_lock(struct tasklet_struct *t) +{ + while (!tasklet_trylock(t)) + cpu_relax(); +} + +static inline bool tasklet_is_locked(const struct tasklet_struct *t) +{ + return test_bit(TASKLET_STATE_RUN, &t->state); +} + +static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) +{ + if (!atomic_fetch_inc(&t->count)) + tasklet_unlock_wait(t); +} + +static inline bool __tasklet_is_enabled(const struct tasklet_struct *t) +{ + return !atomic_read(&t->count); +} + +static inline bool __tasklet_enable(struct tasklet_struct *t) +{ + return atomic_dec_and_test(&t->count); +} + +static inline bool __tasklet_is_scheduled(struct tasklet_struct *t) +{ + return test_bit(TASKLET_STATE_SCHED, &t->state); +} + +struct i915_gem_ww_ctx { + struct ww_acquire_ctx ctx; + struct list_head obj_list; + bool intr; + struct drm_i915_gem_object *contended; +}; + +void i915_gem_ww_ctx_init(struct i915_gem_ww_ctx *ctx, bool intr); +void i915_gem_ww_ctx_fini(struct i915_gem_ww_ctx *ctx); +int __must_check i915_gem_ww_ctx_backoff(struct i915_gem_ww_ctx *ctx); +void i915_gem_ww_unlock_single(struct drm_i915_gem_object *obj); + +#endif /* __I915_GEM_H__ */ |