mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9f3ccd40ac
Keep the intel_context as being the primary state for i915_request, with the GEM context a backpointer from the low level state for the rarer cases we need client information. Our goal is to remove such references to clients from the backend, and leave the HW submission agnostic to client interfaces and self-contained. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Andi Shyti <andi.shyti@intel.com> Reviewed-by: Andi Shyti <andi.shyti@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191220101230.256839-1-chris@chris-wilson.co.uk
206 lines
5.0 KiB
C
206 lines
5.0 KiB
C
/*
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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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#include <linux/bitops.h>
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#include <linux/lockdep.h>
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#include <linux/types.h>
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#include "i915_active.h"
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#include "intel_context_types.h"
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#include "intel_engine_types.h"
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#include "intel_ring_types.h"
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#include "intel_timeline_types.h"
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#define CE_TRACE(ce, fmt, ...) do { \
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const struct intel_context *ce__ = (ce); \
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ENGINE_TRACE(ce__->engine, "context:%llx" fmt, \
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ce__->timeline->fence_context, \
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##__VA_ARGS__); \
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} while (0)
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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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void intel_context_fini(struct intel_context *ce);
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struct intel_context *
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intel_context_create(struct i915_gem_context *ctx,
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struct intel_engine_cs *engine);
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void intel_context_free(struct intel_context *ce);
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/**
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* intel_context_lock_pinned - Stablises the 'pinned' status of the HW context
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* @ce - the context
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*
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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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*/
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static inline int intel_context_lock_pinned(struct intel_context *ce)
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__acquires(ce->pin_mutex)
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{
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return mutex_lock_interruptible(&ce->pin_mutex);
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}
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/**
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* intel_context_is_pinned - Reports the 'pinned' status
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* @ce - the context
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*
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* While in use by the GPU, the context, along with its ring and page
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* tables is pinned into memory and the GTT.
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*
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* Returns: true if the context is currently pinned for use by the GPU.
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*/
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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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/**
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* intel_context_unlock_pinned - Releases the earlier locking of 'pinned' status
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* @ce - the context
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*
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* Releases the lock earlier acquired by intel_context_unlock_pinned().
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*/
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static inline void intel_context_unlock_pinned(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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int __intel_context_do_pin(struct intel_context *ce);
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static inline int intel_context_pin(struct intel_context *ce)
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{
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if (likely(atomic_inc_not_zero(&ce->pin_count)))
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return 0;
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return __intel_context_do_pin(ce);
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}
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static inline void __intel_context_pin(struct intel_context *ce)
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{
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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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}
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void intel_context_unpin(struct intel_context *ce);
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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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lockdep_assert_held(&ce->timeline->mutex);
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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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lockdep_assert_held(&ce->timeline->mutex);
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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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lockdep_assert_held(&ce->timeline->mutex);
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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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int intel_context_active_acquire(struct intel_context *ce);
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void intel_context_active_release(struct intel_context *ce);
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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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static inline struct intel_timeline *__must_check
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intel_context_timeline_lock(struct intel_context *ce)
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__acquires(&ce->timeline->mutex)
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{
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struct intel_timeline *tl = ce->timeline;
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int err;
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err = mutex_lock_interruptible(&tl->mutex);
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if (err)
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return ERR_PTR(err);
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return tl;
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}
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static inline void intel_context_timeline_unlock(struct intel_timeline *tl)
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__releases(&tl->mutex)
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{
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mutex_unlock(&tl->mutex);
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}
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int intel_context_prepare_remote_request(struct intel_context *ce,
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struct i915_request *rq);
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struct i915_request *intel_context_create_request(struct intel_context *ce);
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static inline struct intel_ring *__intel_context_ring_size(u64 sz)
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{
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return u64_to_ptr(struct intel_ring, sz);
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}
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static inline bool intel_context_is_banned(const struct intel_context *ce)
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{
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return test_bit(CONTEXT_BANNED, &ce->flags);
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}
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static inline bool intel_context_set_banned(struct intel_context *ce)
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{
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return test_and_set_bit(CONTEXT_BANNED, &ce->flags);
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}
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static inline bool
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intel_context_force_single_submission(const struct intel_context *ce)
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{
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return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
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}
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static inline void
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intel_context_set_single_submission(struct intel_context *ce)
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{
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__set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
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}
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static inline bool
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intel_context_nopreempt(const struct intel_context *ce)
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{
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return test_bit(CONTEXT_NOPREEMPT, &ce->flags);
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}
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static inline void
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intel_context_set_nopreempt(struct intel_context *ce)
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{
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set_bit(CONTEXT_NOPREEMPT, &ce->flags);
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}
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static inline void
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intel_context_clear_nopreempt(struct intel_context *ce)
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{
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clear_bit(CONTEXT_NOPREEMPT, &ce->flags);
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}
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#endif /* __INTEL_CONTEXT_H__ */
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