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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2019 Intel Corporation
*/
#ifndef __INTEL_CONTEXT_H__
#define __INTEL_CONTEXT_H__
#include "intel_context_types.h"
#include "intel_engine_types.h"
struct intel_context *intel_context_alloc(void);
void intel_context_free(struct intel_context *ce);
void intel_context_init(struct intel_context *ce,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine);
/**
* intel_context_lookup - Find the matching HW context for this (ctx, engine)
* @ctx - the parent GEM context
* @engine - the target HW engine
*
* May return NULL if the HW context hasn't been instantiated (i.e. unused).
*/
struct intel_context *
intel_context_lookup(struct i915_gem_context *ctx,
struct intel_engine_cs *engine);
/**
* intel_context_instance - Lookup or allocate the HW context for (ctx, engine)
* @ctx - the parent GEM context
* @engine - the target HW engine
*
* Returns the existing HW context for this pair of (GEM context, engine), or
* allocates and initialises a fresh context. Once allocated, the HW context
* remains resident until the GEM context is destroyed.
*/
struct intel_context *
intel_context_instance(struct i915_gem_context *ctx,
struct intel_engine_cs *engine);
struct intel_context *
__intel_context_insert(struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
struct intel_context *ce);
void
__intel_context_remove(struct intel_context *ce);
static inline struct intel_context *
intel_context_pin(struct i915_gem_context *ctx, struct intel_engine_cs *engine)
{
return engine->context_pin(engine, ctx);
}
static inline void __intel_context_pin(struct intel_context *ce)
{
GEM_BUG_ON(!ce->pin_count);
ce->pin_count++;
}
static inline void intel_context_unpin(struct intel_context *ce)
{
GEM_BUG_ON(!ce->pin_count);
if (--ce->pin_count)
return;
GEM_BUG_ON(!ce->ops);
ce->ops->unpin(ce);
}
#endif /* __INTEL_CONTEXT_H__ */
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