From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42D25C43600 for ; Wed, 15 Jul 2020 11:52:54 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 24B2120658 for ; Wed, 15 Jul 2020 11:52:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 24B2120658 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B684A6EB1D; Wed, 15 Jul 2020 11:52:48 +0000 (UTC) Received: from fireflyinternet.com (unknown [77.68.26.236]) by gabe.freedesktop.org (Postfix) with ESMTPS id CB30E6EAE2 for ; Wed, 15 Jul 2020 11:52:03 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 21826150-1500050 for multiple; Wed, 15 Jul 2020 12:51:56 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Wed, 15 Jul 2020 12:51:23 +0100 Message-Id: <20200715115147.11866-42-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200715115147.11866-1-chris@chris-wilson.co.uk> References: <20200715115147.11866-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 42/66] drm/i915/gt: Simplify virtual engine handling for execlists_hold() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Wilson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Now that the tasklet completely controls scheduling of the requests, and we postpone scheduling out the old requests, we can keep a hanging virtual request bound to the engine on which it hung, and remove it from te queue. On release, it will be returned to the same engine and remain in its queue until it is scheduled; after which point it will become eligible for transfer to a sibling. Instead, we could opt to resubmit the request along the virtual engine on unhold, making it eligible for load balancing immediately -- but that seems like a pointless optimisation for a hanging context. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/gt/intel_lrc.c | 29 ----------------------------- 1 file changed, 29 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 062185116e13..0020fc77b3da 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -2771,35 +2771,6 @@ static bool execlists_hold(struct intel_engine_cs *engine, goto unlock; } - if (rq->engine != engine) { /* preempted virtual engine */ - struct virtual_engine *ve = to_virtual_engine(rq->engine); - - /* - * intel_context_inflight() is only protected by virtue - * of process_csb() being called only by the tasklet (or - * directly from inside reset while the tasklet is suspended). - * Assert that neither of those are allowed to run while we - * poke at the request queues. - */ - GEM_BUG_ON(!reset_in_progress(&engine->execlists)); - - /* - * An unsubmitted request along a virtual engine will - * remain on the active (this) engine until we are able - * to process the context switch away (and so mark the - * context as no longer in flight). That cannot have happened - * yet, otherwise we would not be hanging! - */ - spin_lock(&ve->base.active.lock); - GEM_BUG_ON(intel_context_inflight(rq->context) != engine); - GEM_BUG_ON(ve->request != rq); - ve->request = NULL; - spin_unlock(&ve->base.active.lock); - i915_request_put(rq); - - rq->engine = engine; - } - /* * Transfer this request onto the hold queue to prevent it * being resumbitted to HW (and potentially completed) before we have -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx