2019-03-08 20:25:17 +07:00
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/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_CONTEXT_H__
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#define __INTEL_CONTEXT_H__
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2019-03-08 20:25:22 +07:00
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#include <linux/lockdep.h>
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2019-03-08 20:25:17 +07:00
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#include "intel_context_types.h"
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#include "intel_engine_types.h"
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2019-03-08 20:25:19 +07:00
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struct intel_context *intel_context_alloc(void);
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void intel_context_free(struct intel_context *ce);
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2019-03-08 20:25:17 +07:00
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void intel_context_init(struct intel_context *ce,
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struct i915_gem_context *ctx,
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struct intel_engine_cs *engine);
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2019-03-08 20:25:19 +07:00
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/**
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* intel_context_lookup - Find the matching HW context for this (ctx, engine)
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* @ctx - the parent GEM context
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* @engine - the target HW engine
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*
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* May return NULL if the HW context hasn't been instantiated (i.e. unused).
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*/
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struct intel_context *
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intel_context_lookup(struct i915_gem_context *ctx,
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struct intel_engine_cs *engine);
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/**
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2019-03-08 20:25:22 +07:00
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* intel_context_pin_lock - Stablises the 'pinned' status of the HW context
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2019-03-08 20:25:19 +07:00
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* @ctx - the parent GEM context
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* @engine - the target HW engine
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*
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2019-03-08 20:25:22 +07:00
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* Acquire a lock on the pinned status of the HW context, such that the context
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* can neither be bound to the GPU or unbound whilst the lock is held, i.e.
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* intel_context_is_pinned() remains stable.
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2019-03-08 20:25:19 +07:00
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*/
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struct intel_context *
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2019-03-08 20:25:22 +07:00
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intel_context_pin_lock(struct i915_gem_context *ctx,
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2019-03-08 20:25:19 +07:00
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struct intel_engine_cs *engine);
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2019-03-08 20:25:22 +07:00
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static inline bool
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intel_context_is_pinned(struct intel_context *ce)
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{
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return atomic_read(&ce->pin_count);
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}
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static inline void intel_context_pin_unlock(struct intel_context *ce)
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__releases(ce->pin_mutex)
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{
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mutex_unlock(&ce->pin_mutex);
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}
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2019-03-08 20:25:19 +07:00
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struct intel_context *
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__intel_context_insert(struct i915_gem_context *ctx,
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struct intel_engine_cs *engine,
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struct intel_context *ce);
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void
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__intel_context_remove(struct intel_context *ce);
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2019-03-08 20:25:17 +07:00
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2019-03-08 20:25:20 +07:00
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struct intel_context *
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intel_context_pin(struct i915_gem_context *ctx, struct intel_engine_cs *engine);
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2019-03-08 20:25:17 +07:00
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static inline void __intel_context_pin(struct intel_context *ce)
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{
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2019-03-08 20:25:22 +07:00
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GEM_BUG_ON(!intel_context_is_pinned(ce));
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atomic_inc(&ce->pin_count);
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2019-03-08 20:25:17 +07:00
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}
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2019-03-08 20:25:22 +07:00
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void intel_context_unpin(struct intel_context *ce);
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2019-03-08 20:25:17 +07:00
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2019-04-25 03:07:15 +07:00
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void intel_context_enter_engine(struct intel_context *ce);
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void intel_context_exit_engine(struct intel_context *ce);
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static inline void intel_context_enter(struct intel_context *ce)
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{
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if (!ce->active_count++)
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ce->ops->enter(ce);
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}
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static inline void intel_context_mark_active(struct intel_context *ce)
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{
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++ce->active_count;
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}
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static inline void intel_context_exit(struct intel_context *ce)
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{
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GEM_BUG_ON(!ce->active_count);
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if (!--ce->active_count)
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ce->ops->exit(ce);
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}
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2019-03-19 04:23:47 +07:00
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static inline struct intel_context *intel_context_get(struct intel_context *ce)
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{
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kref_get(&ce->ref);
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return ce;
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}
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static inline void intel_context_put(struct intel_context *ce)
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{
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kref_put(&ce->ref, ce->ops->destroy);
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}
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2019-03-08 20:25:17 +07:00
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#endif /* __INTEL_CONTEXT_H__ */
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