From patchwork Sat Oct 23 18:05:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 12579701 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18C30C433EF for ; Sat, 23 Oct 2021 18:10:10 +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 CE5CB60ED5 for ; Sat, 23 Oct 2021 18:10:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CE5CB60ED5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 001D46E0E7; Sat, 23 Oct 2021 18:09:54 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id C6A8789E9E; Sat, 23 Oct 2021 18:09:52 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10146"; a="209566139" X-IronPort-AV: E=Sophos;i="5.87,175,1631602800"; d="scan'208";a="209566139" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Oct 2021 11:09:52 -0700 X-IronPort-AV: E=Sophos;i="5.87,175,1631602800"; d="scan'208";a="528262362" Received: from jons-linux-dev-box.fm.intel.com ([10.1.27.20]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Oct 2021 11:09:52 -0700 From: Matthew Brost To: , Cc: , Date: Sat, 23 Oct 2021 11:05:09 -0700 Message-Id: <20211023180510.35152-3-matthew.brost@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211023180510.35152-1-matthew.brost@intel.com> References: <20211023180510.35152-1-matthew.brost@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 2/3] drm/i915/guc: Flush G2H work queue during reset 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" It isn't safe to scrub for missing G2H or continue with the reset until all G2H processing is complete. Flush the G2H work queue during reset to ensure it is done running. No need to call the IRQ handler directly either as the scrubbing code can deal with any missing G2H. Signed-off-by: Matthew Brost Reviewed-by: Daniele Ceraolo Spurio --- .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 9a5aeba033e0..5f584283631b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -1128,8 +1128,6 @@ static void guc_flush_destroyed_contexts(struct intel_guc *guc); void intel_guc_submission_reset_prepare(struct intel_guc *guc) { - int i; - if (unlikely(!guc_submission_initialized(guc))) { /* Reset called during driver load? GuC not yet initialised! */ return; @@ -1145,21 +1143,7 @@ void intel_guc_submission_reset_prepare(struct intel_guc *guc) guc_flush_submissions(guc); guc_flush_destroyed_contexts(guc); - - /* - * Handle any outstanding G2Hs before reset. Call IRQ handler directly - * each pass as interrupt have been disabled. We always scrub for - * outstanding G2H as it is possible for outstanding_submission_g2h to - * be incremented after the context state update. - */ - for (i = 0; i < 4 && atomic_read(&guc->outstanding_submission_g2h); ++i) { - intel_guc_to_host_event_handler(guc); -#define wait_for_reset(guc, wait_var) \ - intel_guc_wait_for_pending_msg(guc, wait_var, false, (HZ / 20)) - do { - wait_for_reset(guc, &guc->outstanding_submission_g2h); - } while (!list_empty(&guc->ct.requests.incoming)); - } + flush_work(&guc->ct.requests.worker); scrub_guc_desc_for_outstanding_g2h(guc); }