diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_request.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.h | 175 |
1 files changed, 157 insertions, 18 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h index edbbdfec24ab..f57eadcf3583 100644 --- a/drivers/gpu/drm/i915/i915_request.h +++ b/drivers/gpu/drm/i915/i915_request.h @@ -28,7 +28,10 @@ #include <linux/dma-fence.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" @@ -40,14 +43,19 @@ struct drm_file; struct drm_i915_gem_object; struct i915_request; -struct i915_timeline; -struct i915_timeline_cacheline; struct i915_capture_list { struct i915_capture_list *next; struct i915_vma *vma; }; +#define RQ_TRACE(rq, fmt, ...) do { \ + const struct i915_request *rq__ = (rq); \ + ENGINE_TRACE(rq__->engine, "fence %llx:%lld, current %d " fmt, \ + rq__->fence.context, rq__->fence.seqno, \ + hwsp_seqno(rq__), ##__VA_ARGS__); \ +} while (0) + enum { /* * I915_FENCE_FLAG_ACTIVE - this request is currently submitted to HW. @@ -63,12 +71,63 @@ enum { I915_FENCE_FLAG_ACTIVE = DMA_FENCE_FLAG_USER_BITS, /* + * I915_FENCE_FLAG_PQUEUE - this request is ready for execution + * + * Using the scheduler, when a request is ready for execution it is put + * into the priority queue, and removed from that queue when transferred + * to the HW runlists. We want to track its membership within the + * priority queue so that we can easily check before rescheduling. + * + * See i915_request_in_priority_queue() + */ + I915_FENCE_FLAG_PQUEUE, + + /* * I915_FENCE_FLAG_SIGNAL - this request is currently on signal_list * * Internal bookkeeping used by the breadcrumb code to track when * a request is on the various signal_list. */ I915_FENCE_FLAG_SIGNAL, + + /* + * I915_FENCE_FLAG_HOLD - this request is currently on hold + * + * This request has been suspended, pending an ongoing investigation. + */ + I915_FENCE_FLAG_HOLD, + + /* + * I915_FENCE_FLAG_NOPREEMPT - this request should not be preempted + * + * The execution of some requests should not be interrupted. This is + * a sensitive operation as it makes the request super important, + * blocking other higher priority work. Abuse of this flag will + * lead to quality of service issues. + */ + I915_FENCE_FLAG_NOPREEMPT, + + /* + * I915_FENCE_FLAG_SENTINEL - this request should be last in the queue + * + * A high priority sentinel request may be submitted to clear the + * submission queue. As it will be the only request in-flight, upon + * execution all other active requests will have been preempted and + * unsubmitted. This preemptive pulse is used to re-evaluate the + * in-flight requests, particularly in cases where an active context + * is banned and those active requests need to be cancelled. + */ + I915_FENCE_FLAG_SENTINEL, + + /* + * I915_FENCE_FLAG_BOOST - upclock the gpu for this request + * + * Some requests are more important than others! In particular, a + * request that the user is waiting on is typically required for + * interactive latency, for which we want to minimise by upclocking + * the GPU. Here we track such boost requests on a per-request basis. + */ + I915_FENCE_FLAG_BOOST, }; /** @@ -108,11 +167,10 @@ struct i915_request { * i915_request_free() will then decrement the refcount on the * context. */ - struct i915_gem_context *gem_context; struct intel_engine_cs *engine; - struct intel_context *hw_context; + struct intel_context *context; struct intel_ring *ring; - struct i915_timeline *timeline; + struct intel_timeline __rcu *timeline; struct list_head signal_link; /* @@ -143,6 +201,10 @@ struct i915_request { union { wait_queue_entry_t submitq; struct i915_sw_dma_fence_cb dmaq; + struct i915_request_duration_cb { + struct dma_fence_cb cb; + ktime_t emitted; + } duration; }; struct list_head execute_cb; struct i915_sw_fence semaphore; @@ -175,7 +237,7 @@ struct i915_request { * inside the timeline's HWSP vma, but it is only valid while this * request has not completed and guarded by the timeline mutex. */ - struct i915_timeline_cacheline *hwsp_cacheline; + struct intel_timeline_cacheline __rcu *hwsp_cacheline; /** Position in the ring of the start of the request */ u32 head; @@ -210,19 +272,13 @@ struct i915_request { * on the active_list (of their final request). */ struct i915_capture_list *capture_list; - struct list_head active_list; /** Time at which this request was emitted, in jiffies. */ unsigned long emitted_jiffies; - bool waitboost; - /** timeline->request entry for this request */ struct list_head link; - /** ring->request_list entry for this request */ - struct list_head ring_link; - struct drm_i915_file_private *file_priv; /** file_priv list entry for this request */ struct list_head client_link; @@ -248,7 +304,10 @@ struct i915_request * __must_check i915_request_create(struct intel_context *ce); struct i915_request *__i915_request_commit(struct i915_request *request); +void __i915_request_queue(struct i915_request *rq, + const struct i915_sched_attr *attr); +bool i915_request_retire(struct i915_request *rq); void i915_request_retire_upto(struct i915_request *rq); static inline struct i915_request * @@ -290,7 +349,7 @@ int i915_request_await_execution(struct i915_request *rq, void i915_request_add(struct i915_request *rq); -void __i915_request_submit(struct i915_request *request); +bool __i915_request_submit(struct i915_request *request); void i915_request_submit(struct i915_request *request); void i915_request_skip(struct i915_request *request, int error); @@ -307,10 +366,8 @@ long i915_request_wait(struct i915_request *rq, long timeout) __attribute__((nonnull(1))); #define I915_WAIT_INTERRUPTIBLE BIT(0) -#define I915_WAIT_LOCKED BIT(1) /* struct_mutex held, handle GPU reset */ -#define I915_WAIT_PRIORITY BIT(2) /* small priority bump for the request */ -#define I915_WAIT_ALL BIT(3) /* used by i915_gem_object_wait() */ -#define I915_WAIT_FOR_IDLE_BOOST BIT(4) +#define I915_WAIT_PRIORITY BIT(1) /* small priority bump for the request */ +#define I915_WAIT_ALL BIT(2) /* used by i915_gem_object_wait() */ static inline bool i915_request_signaled(const struct i915_request *rq) { @@ -323,6 +380,11 @@ static inline bool i915_request_is_active(const struct i915_request *rq) return test_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags); } +static inline bool i915_request_in_priority_queue(const struct i915_request *rq) +{ + return test_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); +} + /** * Returns true if seq1 is later than seq2. */ @@ -416,6 +478,27 @@ static inline bool i915_request_is_running(const struct i915_request *rq) return __i915_request_has_started(rq); } +/** + * i915_request_is_running - 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) +{ + return !list_empty(&rq->sched.link); +} + static inline bool i915_request_completed(const struct i915_request *rq) { if (i915_request_signaled(rq)) @@ -429,6 +512,62 @@ static inline void i915_request_mark_complete(struct i915_request *rq) rq->hwsp_seqno = (u32 *)&rq->fence.seqno; /* decouple from HWSP */ } -bool i915_retire_requests(struct drm_i915_private *i915); +static inline bool i915_request_has_waitboost(const struct i915_request *rq) +{ + return test_bit(I915_FENCE_FLAG_BOOST, &rq->fence.flags); +} + +static inline bool i915_request_has_nopreempt(const struct i915_request *rq) +{ + /* Preemption should only be disabled very rarely */ + return unlikely(test_bit(I915_FENCE_FLAG_NOPREEMPT, &rq->fence.flags)); +} + +static inline bool i915_request_has_sentinel(const struct i915_request *rq) +{ + return unlikely(test_bit(I915_FENCE_FLAG_SENTINEL, &rq->fence.flags)); +} + +static inline bool i915_request_on_hold(const struct i915_request *rq) +{ + return unlikely(test_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags)); +} + +static inline void i915_request_set_hold(struct i915_request *rq) +{ + set_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags); +} + +static inline void i915_request_clear_hold(struct i915_request *rq) +{ + clear_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags); +} + +static inline struct intel_timeline * +i915_request_timeline(struct i915_request *rq) +{ + /* Valid only while the request is being constructed (or retired). */ + return rcu_dereference_protected(rq->timeline, + lockdep_is_held(&rcu_access_pointer(rq->timeline)->mutex)); +} + +static inline struct i915_gem_context * +i915_request_gem_context(struct i915_request *rq) +{ + /* Valid only while the request is being constructed (or retired). */ + return rcu_dereference_protected(rq->context->gem_context, true); +} + +static inline struct intel_timeline * +i915_request_active_timeline(struct i915_request *rq) +{ + /* + * When in use during submission, we are protected by a guarantee that + * the context/timeline is pinned and must remain pinned until after + * this submission. + */ + return rcu_dereference_protected(rq->timeline, + lockdep_is_held(&rq->engine->active.lock)); +} #endif /* I915_REQUEST_H */ |
