[22/22] drm/i915: Markup expected timeline locks for i915_active

Message ID	20190806090535.14807-22-chris@chris-wilson.co.uk (mailing list archive)
State	New, archived
Headers	show Return-Path: <intel-gfx-bounces@lists.freedesktop.org> From: Chris Wilson <chris@chris-wilson.co.uk> To: intel-gfx@lists.freedesktop.org Date: Tue, 6 Aug 2019 10:05:35 +0100 Message-Id: <20190806090535.14807-22-chris@chris-wilson.co.uk> In-Reply-To: <20190806090535.14807-1-chris@chris-wilson.co.uk> References: <20190806090535.14807-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 22/22] drm/i915: Markup expected timeline locks for i915_active Precedence: list Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
Series	[01/22] drm/i915/gem: Make caps.scheduler static \| expand [01/22] drm/i915/gem: Make caps.scheduler static [02/22] drm/i915/gt: Move the [class][inst] lookup for engines onto the GT [03/22] drm/i915: Defer final intel_wakeref_put to process context [04/22] drm/i915/pmu: Use GT parked for estimating RC6 while asleep [05/22] drm/i915: Drop the fudge warning on ring restart for ctg/elk [06/22] drm/i915/selftests: Pass intel_context to mock_request [07/22] drm/i915/gt: Make deferred context allocation explicit [08/22] drm/i915: Push the ring creation flags to the backend [09/22] drm/i915: Lift timeline into intel_context [10/22] drm/i915: Use intel_engine_lookup_user for probing HAS_BSD etc [11/22] drm/i915: Isolate i915_getparam_ioctl() [12/22] drm/i915: Only include active engines in the capture state [13/22] drm/i915: Make debugfs/per_file_stats scale better [14/22] drm/i915/gt: Track timeline activeness in enter/exit [15/22] drm/i915/gt: Convert timeline tracking to spinlock [16/22] drm/i915/gt: Guard timeline pinning with its own mutex [17/22] drm/i915: Protect request retirement with timeline->mutex [18/22] drm/i915/gt: Mark context->active_count as protected by timeline->mutex [19/22] drm/i915: Forgo last_fence active request tracking [20/22] drm/i915/overlay: Switch to using i915_active tracking [21/22] drm/i915: Extract intel_frontbuffer active tracking [22/22] drm/i915: Markup expected timeline locks for i915_active

diff --git a/drivers/gpu/drm/i915/display/intel_overlay.c b/drivers/gpu/drm/i915/display/intel_overlay.c index 1a15fa34205c..d5e06b463567 100644 --- a/drivers/gpu/drm/i915/display/intel_overlay.c +++ b/drivers/gpu/drm/i915/display/intel_overlay.c @@ -230,7 +230,7 @@ alloc_request(struct intel_overlay *overlay, void (*fn)(struct intel_overlay *)) if (IS_ERR(rq)) return rq; - err = i915_active_ref(&overlay->last_flip, rq->fence.context, rq); + err = i915_active_ref(&overlay->last_flip, rq->timeline, rq); if (err) { i915_request_add(rq); return ERR_PTR(err); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c index 997e122545bc..6b1565205403 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c @@ -197,7 +197,7 @@ static void clear_pages_worker(struct work_struct *work) * keep track of the GPU activity within this vma/request, and * propagate the signal from the request to w->dma. */ - err = i915_active_ref(&vma->active, rq->fence.context, rq); + err = i915_active_ref(&vma->active, rq->timeline, rq); if (err) goto out_request; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index f26c21e74eda..a9e1cecf56ed 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -966,7 +966,7 @@ static int context_barrier_task(struct i915_gem_context *ctx, if (emit) err = emit(rq, data); if (err == 0) - err = i915_active_ref(&cb->base, rq->fence.context, rq); + err = i915_active_ref(&cb->base, rq->timeline, rq); i915_request_add(rq); if (err) diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 9114953bf920..f55691d151ae 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -306,10 +306,10 @@ int intel_context_prepare_remote_request(struct intel_context *ce, /* Queue this switch after current activity by this context. */ err = i915_active_request_set(&tl->last_request, rq); + mutex_unlock(&tl->mutex); if (err) - goto unlock; + return err; } - lockdep_assert_held(&tl->mutex); /* * Guarantee context image and the timeline remains pinned until the @@ -319,12 +319,7 @@ int intel_context_prepare_remote_request(struct intel_context *ce, * words transfer the pinned ce object to tracked active request. */ GEM_BUG_ON(i915_active_is_idle(&ce->active)); - err = i915_active_ref(&ce->active, rq->fence.context, rq); - -unlock: - if (rq->timeline != tl) - mutex_unlock(&tl->mutex); - return err; + return i915_active_ref(&ce->active, rq->timeline, rq); } struct i915_request *intel_context_create_request(struct intel_context *ce) diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pool.h b/drivers/gpu/drm/i915/gt/intel_engine_pool.h index f7a0a660c1c9..8d069efd9457 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pool.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_pool.h @@ -18,7 +18,7 @@ static inline int intel_engine_pool_mark_active(struct intel_engine_pool_node *node, struct i915_request *rq) { - return i915_active_ref(&node->active, rq->fence.context, rq); + return i915_active_ref(&node->active, rq->timeline, rq); } static inline void diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c index eafd94d5e211..02fbe11b671b 100644 --- a/drivers/gpu/drm/i915/gt/intel_timeline.c +++ b/drivers/gpu/drm/i915/gt/intel_timeline.c @@ -254,7 +254,7 @@ int intel_timeline_init(struct intel_timeline *timeline, mutex_init(&timeline->mutex); - INIT_ACTIVE_REQUEST(&timeline->last_request); + INIT_ACTIVE_REQUEST(&timeline->last_request, &timeline->mutex); INIT_LIST_HEAD(&timeline->requests); i915_syncmap_init(&timeline->sync); @@ -440,8 +440,7 @@ __intel_timeline_get_seqno(struct intel_timeline *tl, * free it after the current request is retired, which ensures that * all writes into the cacheline from previous requests are complete. */ - err = i915_active_ref(&tl->hwsp_cacheline->active, - tl->fence_context, rq); + err = i915_active_ref(&tl->hwsp_cacheline->active, tl, rq); if (err) goto err_cacheline; @@ -492,7 +491,7 @@ int intel_timeline_get_seqno(struct intel_timeline *tl, static int cacheline_ref(struct intel_timeline_cacheline *cl, struct i915_request *rq) { - return i915_active_ref(&cl->active, rq->fence.context, rq); + return i915_active_ref(&cl->active, rq->timeline, rq); } int intel_timeline_read_hwsp(struct i915_request *from, diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c index d54113697745..321481403165 100644 --- a/drivers/gpu/drm/i915/gt/selftest_timeline.c +++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c @@ -689,7 +689,9 @@ static int live_hwsp_wrap(void *arg) tl->seqno = -4u; + mutex_lock_nested(&tl->mutex, SINGLE_DEPTH_NESTING); err = intel_timeline_get_seqno(tl, rq, &seqno[0]); + mutex_unlock(&tl->mutex); if (err) { i915_request_add(rq); goto out; @@ -704,7 +706,9 @@ static int live_hwsp_wrap(void *arg) } hwsp_seqno[0] = tl->hwsp_seqno; + mutex_lock_nested(&tl->mutex, SINGLE_DEPTH_NESTING); err = intel_timeline_get_seqno(tl, rq, &seqno[1]); + mutex_unlock(&tl->mutex); if (err) { i915_request_add(rq); goto out; diff --git a/drivers/gpu/drm/i915/gt/selftests/mock_timeline.c b/drivers/gpu/drm/i915/gt/selftests/mock_timeline.c index 5c549205828a..598170efcaf6 100644 --- a/drivers/gpu/drm/i915/gt/selftests/mock_timeline.c +++ b/drivers/gpu/drm/i915/gt/selftests/mock_timeline.c @@ -15,7 +15,7 @@ void mock_timeline_init(struct intel_timeline *timeline, u64 context) mutex_init(&timeline->mutex); - INIT_ACTIVE_REQUEST(&timeline->last_request); + INIT_ACTIVE_REQUEST(&timeline->last_request, &timeline->mutex); INIT_LIST_HEAD(&timeline->requests); i915_syncmap_init(&timeline->sync); diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index 7698fcaa648a..8ec53f2dc1dc 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -163,10 +163,11 @@ node_retire(struct i915_active_request *base, struct i915_request *rq) } static struct i915_active_request * -active_instance(struct i915_active *ref, u64 idx) +active_instance(struct i915_active *ref, struct intel_timeline *tl) { struct active_node *node, *prealloc; struct rb_node **p, *parent; + u64 idx = tl->fence_context; /* * We track the most recently used timeline to skip a rbtree search @@ -205,7 +206,7 @@ active_instance(struct i915_active *ref, u64 idx) } node = prealloc; - i915_active_request_init(&node->base, NULL, node_retire); + i915_active_request_init(&node->base, &tl->mutex, NULL, node_retire); node->ref = ref; node->timeline = idx; @@ -281,18 +282,20 @@ static bool __active_del_barrier(struct i915_active *ref, } int i915_active_ref(struct i915_active *ref, - u64 timeline, + struct intel_timeline *tl, struct i915_request *rq) { struct i915_active_request *active; int err; + lockdep_assert_held(&tl->mutex); + /* Prevent reaping in case we malloc/wait while building the tree */ err = i915_active_acquire(ref); if (err) return err; - active = active_instance(ref, timeline); + active = active_instance(ref, tl); if (!active) { err = -ENOMEM; goto out; @@ -579,6 +582,10 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref, goto unwind; } +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) + node->base.lock = + &engine->kernel_context->timeline->mutex; +#endif RCU_INIT_POINTER(node->base.request, NULL); node->base.retire = node_retire; node->timeline = idx; @@ -683,6 +690,10 @@ int i915_active_request_set(struct i915_active_request *active, { int err; +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) + lockdep_assert_held(active->lock); +#endif + /* Must maintain ordering wrt previous active requests */ err = i915_request_await_active_request(rq, active); if (err) diff --git a/drivers/gpu/drm/i915/i915_active.h b/drivers/gpu/drm/i915/i915_active.h index f6d730cf2fe6..f95058f99057 100644 --- a/drivers/gpu/drm/i915/i915_active.h +++ b/drivers/gpu/drm/i915/i915_active.h @@ -58,15 +58,20 @@ void i915_active_retire_noop(struct i915_active_request *active, */ static inline void i915_active_request_init(struct i915_active_request *active, + struct mutex *lock, struct i915_request *rq, i915_active_retire_fn retire) { RCU_INIT_POINTER(active->request, rq); INIT_LIST_HEAD(&active->link); active->retire = retire ?: i915_active_retire_noop; +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) + active->lock = lock; +#endif } -#define INIT_ACTIVE_REQUEST(name) i915_active_request_init((name), NULL, NULL) +#define INIT_ACTIVE_REQUEST(name, lock) \ + i915_active_request_init((name), (lock), NULL, NULL) /** * i915_active_request_set - updates the tracker to watch the current request @@ -81,6 +86,9 @@ static inline void __i915_active_request_set(struct i915_active_request *active, struct i915_request *request) { +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) + lockdep_assert_held(active->lock); +#endif list_move(&active->link, &request->active_list); rcu_assign_pointer(active->request, request); } @@ -362,7 +370,7 @@ void __i915_active_init(struct drm_i915_private *i915, } while (0) int i915_active_ref(struct i915_active *ref, - u64 timeline, + struct intel_timeline *tl, struct i915_request *rq); int i915_active_wait(struct i915_active *ref); diff --git a/drivers/gpu/drm/i915/i915_active_types.h b/drivers/gpu/drm/i915/i915_active_types.h index ae3ee441c114..d857bd12aa7e 100644 --- a/drivers/gpu/drm/i915/i915_active_types.h +++ b/drivers/gpu/drm/i915/i915_active_types.h @@ -24,6 +24,9 @@ struct i915_active_request { struct i915_request __rcu *request; struct list_head link; i915_active_retire_fn retire; +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) + struct mutex *lock; +#endif }; struct active_node; diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 50314ec7ca36..641ec69c8016 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -902,14 +902,14 @@ int i915_vma_move_to_active(struct i915_vma *vma, * add the active reference first and queue for it to be dropped * *last*. */ - err = i915_active_ref(&vma->active, rq->fence.context, rq); + err = i915_active_ref(&vma->active, rq->timeline, rq); if (unlikely(err)) return err; if (flags & EXEC_OBJECT_WRITE) { if (intel_frontbuffer_invalidate(obj->frontbuffer, ORIGIN_CS)) i915_active_ref(&obj->frontbuffer->write, - rq->fence.context, + rq->timeline, rq); reservation_object_add_excl_fence(vma->resv, &rq->fence); diff --git a/drivers/gpu/drm/i915/selftests/i915_active.c b/drivers/gpu/drm/i915/selftests/i915_active.c index e5cd5d47e380..77d844ac8b71 100644 --- a/drivers/gpu/drm/i915/selftests/i915_active.c +++ b/drivers/gpu/drm/i915/selftests/i915_active.c @@ -110,8 +110,7 @@ __live_active_setup(struct drm_i915_private *i915) submit, GFP_KERNEL); if (err >= 0) - err = i915_active_ref(&active->base, - rq->fence.context, rq); + err = i915_active_ref(&active->base, rq->timeline, rq); i915_request_add(rq); if (err) { pr_err("Failed to track active ref!\n");

[22/22] drm/i915: Markup expected timeline locks for i915_active

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Patch