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/*
* 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__ */
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