From patchwork Fri May 18 09:02:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10408877 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 BBA0E602C2 for ; Fri, 18 May 2018 09:02:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AD170288BB for ; Fri, 18 May 2018 09:02:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A1D08288C5; Fri, 18 May 2018 09:02:19 +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 3CD98288BB for ; Fri, 18 May 2018 09:02:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BD4986ECA9; Fri, 18 May 2018 09:02:18 +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 6B66C6ECA9 for ; Fri, 18 May 2018 09:02:17 +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 11746887-1500050 for ; Fri, 18 May 2018 10:02:13 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Fri, 18 May 2018 10:02:12 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 18 May 2018 10:02:10 +0100 Message-Id: <20180518090212.5349-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.0 X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [CI 1/3] drm/i915: Make intel_engine_dump irqsafe 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 To be useful later, enable intel_engine_dump() to be called from irq context (i.e. using saving and restoring irq start rather than assuming we enter with irqs enabled). Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/intel_engine_cs.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index 26f9f8aab949..2ce18bed6a7b 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -1358,6 +1358,7 @@ void intel_engine_dump(struct intel_engine_cs *engine, const struct intel_engine_execlists * const execlists = &engine->execlists; struct i915_gpu_error * const error = &engine->i915->gpu_error; struct i915_request *rq, *last; + unsigned long flags; struct rb_node *rb; int count; @@ -1424,7 +1425,8 @@ void intel_engine_dump(struct intel_engine_cs *engine, drm_printf(m, "\tDevice is asleep; skipping register dump\n"); } - spin_lock_irq(&engine->timeline.lock); + local_irq_save(flags); + spin_lock(&engine->timeline.lock); last = NULL; count = 0; @@ -1466,16 +1468,17 @@ void intel_engine_dump(struct intel_engine_cs *engine, print_request(m, last, "\t\tQ "); } - spin_unlock_irq(&engine->timeline.lock); + spin_unlock(&engine->timeline.lock); - spin_lock_irq(&b->rb_lock); + spin_lock(&b->rb_lock); for (rb = rb_first(&b->waiters); rb; rb = rb_next(rb)) { struct intel_wait *w = rb_entry(rb, typeof(*w), node); drm_printf(m, "\t%s [%d] waiting for %x\n", w->tsk->comm, w->tsk->pid, w->seqno); } - spin_unlock_irq(&b->rb_lock); + spin_unlock(&b->rb_lock); + local_irq_restore(flags); drm_printf(m, "IRQ? 0x%lx (breadcrumbs? %s) (execlists? %s)\n", engine->irq_posted,