fe25f30483
After a reset, we will ensure that there is at least one request submitted to HW to ensure that a context is loaded for powersaving. Let's wait for this submission via a tasklet to complete before we drop our forcewake, ensuring the system is ready for rc6 before we let it possibly sleep. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180522101937.7738-1-chris@chris-wilson.co.uk Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef __I915_GEM_H__
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#define __I915_GEM_H__
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#include <linux/bug.h>
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#include <linux/interrupt.h>
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struct drm_i915_private;
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#ifdef CONFIG_DRM_I915_DEBUG_GEM
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#define GEM_SHOW_DEBUG() (drm_debug & DRM_UT_DRIVER)
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#define GEM_BUG_ON(condition) do { if (unlikely((condition))) { \
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pr_err("%s:%d GEM_BUG_ON(%s)\n", \
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__func__, __LINE__, __stringify(condition)); \
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GEM_TRACE("%s:%d GEM_BUG_ON(%s)\n", \
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__func__, __LINE__, __stringify(condition)); \
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BUG(); \
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} \
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} while(0)
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#define GEM_WARN_ON(expr) WARN_ON(expr)
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#define GEM_DEBUG_DECL(var) var
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#define GEM_DEBUG_EXEC(expr) expr
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#define GEM_DEBUG_BUG_ON(expr) GEM_BUG_ON(expr)
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#else
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#define GEM_SHOW_DEBUG() (0)
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#define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
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#define GEM_WARN_ON(expr) (BUILD_BUG_ON_INVALID(expr), 0)
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#define GEM_DEBUG_DECL(var)
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#define GEM_DEBUG_EXEC(expr) do { } while (0)
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#define GEM_DEBUG_BUG_ON(expr)
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#endif
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#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM)
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#define GEM_TRACE(...) trace_printk(__VA_ARGS__)
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#define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL)
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#define GEM_TRACE_DUMP_ON(expr) \
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do { if (expr) ftrace_dump(DUMP_ALL); } while (0)
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#else
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#define GEM_TRACE(...) do { } while (0)
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#define GEM_TRACE_DUMP() do { } while (0)
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#define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr)
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#endif
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#define I915_NUM_ENGINES 8
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void i915_gem_park(struct drm_i915_private *i915);
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void i915_gem_unpark(struct drm_i915_private *i915);
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static inline void __tasklet_disable_sync_once(struct tasklet_struct *t)
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{
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if (atomic_inc_return(&t->count) == 1)
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tasklet_unlock_wait(t);
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}
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static inline void __tasklet_enable_sync_once(struct tasklet_struct *t)
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{
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if (atomic_dec_return(&t->count) == 0)
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tasklet_kill(t);
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}
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#endif /* __I915_GEM_H__ */
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