/* * Copyright © 2008-2018 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_REQUEST_H #define I915_REQUEST_H #include <linux/dma-fence.h> #include <linux/hrtimer.h> #include <linux/irq_work.h> #include <linux/llist.h> #include <linux/lockdep.h> #include "gem/i915_gem_context_types.h" #include "gt/intel_context_types.h" #include "gt/intel_engine_types.h" #include "gt/intel_timeline_types.h" #include "i915_gem.h" #include "i915_scheduler.h" #include "i915_selftest.h" #include "i915_sw_fence.h" #include "i915_vma_resource.h" #include <uapi/drm/i915_drm.h> struct drm_file; struct drm_i915_gem_object; struct drm_printer; struct i915_deps; struct i915_request; #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) struct i915_capture_list { … }; void i915_request_free_capture_list(struct i915_capture_list *capture); #else #define i915_request_free_capture_list … #endif #define RQ_TRACE(rq, fmt, ...) … enum { … }; /* * Request queue structure. * * The request queue allows us to note sequence numbers that have been emitted * and may be associated with active buffers to be retired. * * By keeping this list, we can avoid having to do questionable sequence * number comparisons on buffer last_read|write_seqno. It also allows an * emission time to be associated with the request for tracking how far ahead * of the GPU the submission is. * * When modifying this structure be very aware that we perform a lockless * RCU lookup of it that may race against reallocation of the struct * from the slab freelist. We intentionally do not zero the structure on * allocation so that the lookup can use the dangling pointers (and is * cogniscent that those pointers may be wrong). Instead, everything that * needs to be initialised must be done so explicitly. * * The requests are reference counted. */ struct i915_request { … }; #define I915_FENCE_GFP … extern const struct dma_fence_ops i915_fence_ops; static inline bool dma_fence_is_i915(const struct dma_fence *fence) { … } struct kmem_cache *i915_request_slab_cache(void); struct i915_request * __must_check __i915_request_create(struct intel_context *ce, gfp_t gfp); struct i915_request * __must_check i915_request_create(struct intel_context *ce); void __i915_request_skip(struct i915_request *rq); bool i915_request_set_error_once(struct i915_request *rq, int error); struct i915_request *i915_request_mark_eio(struct i915_request *rq); struct i915_request *__i915_request_commit(struct i915_request *request); void __i915_request_queue(struct i915_request *rq, const struct i915_sched_attr *attr); void __i915_request_queue_bh(struct i915_request *rq); bool i915_request_retire(struct i915_request *rq); void i915_request_retire_upto(struct i915_request *rq); static inline struct i915_request * to_request(struct dma_fence *fence) { … } static inline struct i915_request * i915_request_get(struct i915_request *rq) { … } static inline struct i915_request * i915_request_get_rcu(struct i915_request *rq) { … } static inline void i915_request_put(struct i915_request *rq) { … } int i915_request_await_object(struct i915_request *to, struct drm_i915_gem_object *obj, bool write); int i915_request_await_dma_fence(struct i915_request *rq, struct dma_fence *fence); int i915_request_await_deps(struct i915_request *rq, const struct i915_deps *deps); int i915_request_await_execution(struct i915_request *rq, struct dma_fence *fence); void i915_request_add(struct i915_request *rq); bool __i915_request_submit(struct i915_request *request); void i915_request_submit(struct i915_request *request); void __i915_request_unsubmit(struct i915_request *request); void i915_request_unsubmit(struct i915_request *request); void i915_request_cancel(struct i915_request *rq, int error); long i915_request_wait_timeout(struct i915_request *rq, unsigned int flags, long timeout) __attribute__((nonnull(1))); long i915_request_wait(struct i915_request *rq, unsigned int flags, long timeout) __attribute__((nonnull(1))); #define I915_WAIT_INTERRUPTIBLE … #define I915_WAIT_PRIORITY … #define I915_WAIT_ALL … void i915_request_show(struct drm_printer *m, const struct i915_request *rq, const char *prefix, int indent); static inline bool i915_request_signaled(const struct i915_request *rq) { … } static inline bool i915_request_is_active(const struct i915_request *rq) { … } static inline bool i915_request_in_priority_queue(const struct i915_request *rq) { … } static inline bool i915_request_has_initial_breadcrumb(const struct i915_request *rq) { … } /* * Returns true if seq1 is later than seq2. */ static inline bool i915_seqno_passed(u32 seq1, u32 seq2) { … } static inline u32 __hwsp_seqno(const struct i915_request *rq) { … } /** * hwsp_seqno - the current breadcrumb value in the HW status page * @rq: the request, to chase the relevant HW status page * * The emphasis in naming here is that hwsp_seqno() is not a property of the * request, but an indication of the current HW state (associated with this * request). Its value will change as the GPU executes more requests. * * Returns the current breadcrumb value in the associated HW status page (or * the local timeline's equivalent) for this request. The request itself * has the associated breadcrumb value of rq->fence.seqno, when the HW * status page has that breadcrumb or later, this request is complete. */ static inline u32 hwsp_seqno(const struct i915_request *rq) { … } static inline bool __i915_request_has_started(const struct i915_request *rq) { … } /** * i915_request_started - check if the request has begun being executed * @rq: the request * * If the timeline is not using initial breadcrumbs, a request is * considered started if the previous request on its timeline (i.e. * context) has been signaled. * * If the timeline is using semaphores, it will also be emitting an * "initial breadcrumb" after the semaphores are complete and just before * it began executing the user payload. A request can therefore be active * on the HW and not yet started as it is still busywaiting on its * dependencies (via HW semaphores). * * If the request has started, its dependencies will have been signaled * (either by fences or by semaphores) and it will have begun processing * the user payload. * * However, even if a request has started, it may have been preempted and * so no longer active, or it may have already completed. * * See also i915_request_is_active(). * * Returns true if the request has begun executing the user payload, or * has completed: */ static inline bool i915_request_started(const struct i915_request *rq) { … } /** * i915_request_is_running - check if the request may actually be executing * @rq: the request * * Returns true if the request is currently submitted to hardware, has passed * its start point (i.e. the context is setup and not busywaiting). Note that * it may no longer be running by the time the function returns! */ static inline bool i915_request_is_running(const struct i915_request *rq) { … } /** * i915_request_is_ready - check if the request is ready for execution * @rq: the request * * Upon construction, the request is instructed to wait upon various * signals before it is ready to be executed by the HW. That is, we do * not want to start execution and read data before it is written. In practice, * this is controlled with a mixture of interrupts and semaphores. Once * the submit fence is completed, the backend scheduler will place the * request into its queue and from there submit it for execution. So we * can detect when a request is eligible for execution (and is under control * of the scheduler) by querying where it is in any of the scheduler's lists. * * Returns true if the request is ready for execution (it may be inflight), * false otherwise. */ static inline bool i915_request_is_ready(const struct i915_request *rq) { … } static inline bool __i915_request_is_complete(const struct i915_request *rq) { … } static inline bool i915_request_completed(const struct i915_request *rq) { … } static inline void i915_request_mark_complete(struct i915_request *rq) { … } static inline bool i915_request_has_waitboost(const struct i915_request *rq) { … } static inline bool i915_request_has_nopreempt(const struct i915_request *rq) { … } static inline bool i915_request_has_sentinel(const struct i915_request *rq) { … } static inline bool i915_request_on_hold(const struct i915_request *rq) { … } static inline void i915_request_set_hold(struct i915_request *rq) { … } static inline void i915_request_clear_hold(struct i915_request *rq) { … } static inline struct intel_timeline * i915_request_timeline(const struct i915_request *rq) { … } static inline struct i915_gem_context * i915_request_gem_context(const struct i915_request *rq) { … } static inline struct intel_timeline * i915_request_active_timeline(const struct i915_request *rq) { … } static inline u32 i915_request_active_seqno(const struct i915_request *rq) { … } bool i915_request_active_engine(struct i915_request *rq, struct intel_engine_cs **active); void i915_request_notify_execute_cb_imm(struct i915_request *rq); enum i915_request_state { … }; enum i915_request_state i915_test_request_state(struct i915_request *rq); void i915_request_module_exit(void); int i915_request_module_init(void); #endif /* I915_REQUEST_H */
Codebase Browser
linux