From patchwork Fri Apr 27 17:20:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10369543 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D8AF4601BE for ; Fri, 27 Apr 2018 17:21:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C721D2966B for ; Fri, 27 Apr 2018 17:21:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C5E6F294EC; Fri, 27 Apr 2018 17:21:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 183D429592 for ; Fri, 27 Apr 2018 17:20:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 51FE86EAA6; Fri, 27 Apr 2018 17:20:48 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id AEA276EAA6 for ; Fri, 27 Apr 2018 17:20:42 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 11522227-1500050 for ; Fri, 27 Apr 2018 18:20:41 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Fri, 27 Apr 2018 18:20:38 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 27 Apr 2018 18:20:31 +0100 Message-Id: <20180427172031.21903-4-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180427172031.21903-1-chris@chris-wilson.co.uk> References: <20180427172031.21903-1-chris@chris-wilson.co.uk> X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [CI 4/4] drm/i915: Only track live rings for retiring X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP We don't need to track every ring for its lifetime as they are managed by the contexts/engines. What we do want to track are the live rings so that we can sporadically clean up requests if userspace falls behind. We can simply restrict the gt->rings list to being only gt->live_rings. v2: s/live/active/ for consistency with gt.active_requests Suggested-by: Tvrtko Ursulin Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/i915_drv.h | 3 ++- drivers/gpu/drm/i915/i915_gem.c | 6 ++++-- drivers/gpu/drm/i915/i915_request.c | 10 ++++++++-- drivers/gpu/drm/i915/intel_ringbuffer.c | 4 ---- drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +- drivers/gpu/drm/i915/selftests/mock_engine.c | 4 ---- drivers/gpu/drm/i915/selftests/mock_gem_device.c | 5 +++-- 7 files changed, 18 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 1837c01d44d0..54351cace362 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2060,7 +2060,8 @@ struct drm_i915_private { struct i915_gem_timeline global_timeline; struct list_head timelines; - struct list_head rings; + + struct list_head active_rings; u32 active_requests; u32 request_serial; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index f0644d1fbd75..fa1d94a4eb5f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -141,6 +141,7 @@ static u32 __i915_gem_park(struct drm_i915_private *i915) { lockdep_assert_held(&i915->drm.struct_mutex); GEM_BUG_ON(i915->gt.active_requests); + GEM_BUG_ON(!list_empty(&i915->gt.active_rings)); if (!i915->gt.awake) return I915_EPOCH_INVALID; @@ -5599,9 +5600,10 @@ int i915_gem_init_early(struct drm_i915_private *dev_priv) if (!dev_priv->priorities) goto err_dependencies; - mutex_lock(&dev_priv->drm.struct_mutex); - INIT_LIST_HEAD(&dev_priv->gt.rings); INIT_LIST_HEAD(&dev_priv->gt.timelines); + INIT_LIST_HEAD(&dev_priv->gt.active_rings); + + mutex_lock(&dev_priv->drm.struct_mutex); err = i915_gem_timeline_init__global(dev_priv); mutex_unlock(&dev_priv->drm.struct_mutex); if (err) diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index e6535255d445..c8fc4b323e62 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -322,6 +322,7 @@ static void advance_ring(struct i915_request *request) * noops - they are safe to be replayed on a reset. */ tail = READ_ONCE(request->tail); + list_del(&ring->active_link); } else { tail = request->postfix; } @@ -1096,6 +1097,8 @@ void __i915_request_add(struct i915_request *request, bool flush_caches) i915_gem_active_set(&timeline->last_request, request); list_add_tail(&request->ring_link, &ring->request_list); + if (list_is_first(&request->ring_link, &ring->request_list)) + list_add(&ring->active_link, &request->i915->gt.active_rings); request->emitted_jiffies = jiffies; /* @@ -1418,14 +1421,17 @@ static void ring_retire_requests(struct intel_ring *ring) void i915_retire_requests(struct drm_i915_private *i915) { - struct intel_ring *ring, *next; + struct intel_ring *ring, *tmp; lockdep_assert_held(&i915->drm.struct_mutex); if (!i915->gt.active_requests) return; - list_for_each_entry_safe(ring, next, &i915->gt.rings, link) + /* An outstanding request must be on a still active ring somewhere */ + GEM_BUG_ON(list_empty(&i915->gt.active_rings)); + + list_for_each_entry_safe(ring, tmp, &i915->gt.active_rings, active_link) ring_retire_requests(ring); } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index ae8958007df5..007449cfa22b 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1150,8 +1150,6 @@ intel_engine_create_ring(struct intel_engine_cs *engine, int size) } ring->vma = vma; - list_add(&ring->link, &engine->i915->gt.rings); - return ring; } @@ -1163,8 +1161,6 @@ intel_ring_free(struct intel_ring *ring) i915_vma_close(ring->vma); __i915_gem_object_release_unless_active(obj); - list_del(&ring->link); - kfree(ring); } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index deb80d01e0bd..fd679cec9ac6 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -130,7 +130,7 @@ struct intel_ring { void *vaddr; struct list_head request_list; - struct list_head link; + struct list_head active_link; u32 head; u32 tail; diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.c b/drivers/gpu/drm/i915/selftests/mock_engine.c index 42967fc09eb0..629870aeb547 100644 --- a/drivers/gpu/drm/i915/selftests/mock_engine.c +++ b/drivers/gpu/drm/i915/selftests/mock_engine.c @@ -140,15 +140,11 @@ static struct intel_ring *mock_ring(struct intel_engine_cs *engine) INIT_LIST_HEAD(&ring->request_list); intel_ring_update_space(ring); - list_add(&ring->link, &engine->i915->gt.rings); - return ring; } static void mock_ring_free(struct intel_ring *ring) { - list_del(&ring->link); - kfree(ring); } diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index ac4bacf8b5b9..f22a2b35a283 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -224,9 +224,10 @@ struct drm_i915_private *mock_gem_device(void) if (!i915->priorities) goto err_dependencies; - mutex_lock(&i915->drm.struct_mutex); - INIT_LIST_HEAD(&i915->gt.rings); INIT_LIST_HEAD(&i915->gt.timelines); + INIT_LIST_HEAD(&i915->gt.active_rings); + + mutex_lock(&i915->drm.struct_mutex); err = i915_gem_timeline_init__global(i915); if (err) { mutex_unlock(&i915->drm.struct_mutex);