From patchwork Wed Jun 27 20:13:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10492597 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 A3EAB60325 for ; Wed, 27 Jun 2018 20:13:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE13029F95 for ; Wed, 27 Jun 2018 20:13:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A262729FAF; Wed, 27 Jun 2018 20:13:29 +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 5855F29F95 for ; Wed, 27 Jun 2018 20:13:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 027F96EB80; Wed, 27 Jun 2018 20:13:28 +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 585D46EB94 for ; Wed, 27 Jun 2018 20:13:22 +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 12180035-1500050 for multiple; Wed, 27 Jun 2018 21:13:17 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Wed, 27 Jun 2018 21:13:11 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Wed, 27 Jun 2018 21:13:04 +0100 Message-Id: <20180627201304.15817-4-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180627201304.15817-1-chris@chris-wilson.co.uk> References: <20180627201304.15817-1-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] [PATCH 4/4] drm/i915: Only signal from interrupt when requested 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 Avoid calling dma_fence_signal() from inside the interrupt if we haven't enabled signaling on the request. Signed-off-by: Chris Wilson Reviewed-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_irq.c | 8 ++++++-- drivers/gpu/drm/i915/i915_request.c | 2 +- drivers/gpu/drm/i915/intel_ringbuffer.h | 5 ++--- 3 files changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 6adeaac48ea9..1eba2c3895fc 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1173,7 +1173,8 @@ static void notify_ring(struct intel_engine_cs *engine) if (i915_seqno_passed(seqno, wait->seqno)) { struct i915_request *waiter = wait->request; - if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, + if (waiter && + !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &waiter->fence.flags) && intel_wait_check_request(wait, waiter)) rq = i915_request_get(waiter); @@ -1196,8 +1197,11 @@ static void notify_ring(struct intel_engine_cs *engine) spin_unlock(&engine->breadcrumbs.irq_lock); if (rq) { - dma_fence_signal(&rq->fence); + spin_lock(&rq->lock); + dma_fence_signal_locked(&rq->fence); GEM_BUG_ON(!i915_request_completed(rq)); + spin_unlock(&rq->lock); + i915_request_put(rq); } diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 39b296878ba2..a2f7e9358450 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1285,7 +1285,7 @@ long i915_request_wait(struct i915_request *rq, if (flags & I915_WAIT_LOCKED) add_wait_queue(errq, &reset); - intel_wait_init(&wait, rq); + intel_wait_init(&wait); restart: do { diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 44ac90ec540c..78f01a35823a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -928,11 +928,10 @@ static inline u32 intel_hws_preempt_done_address(struct intel_engine_cs *engine) /* intel_breadcrumbs.c -- user interrupt bottom-half for waiters */ int intel_engine_init_breadcrumbs(struct intel_engine_cs *engine); -static inline void intel_wait_init(struct intel_wait *wait, - struct i915_request *rq) +static inline void intel_wait_init(struct intel_wait *wait) { wait->tsk = current; - wait->request = rq; + wait->request = NULL; } static inline void intel_wait_init_for_seqno(struct intel_wait *wait, u32 seqno)