From patchwork Wed Jan 19 21:24:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 12717791 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 48492C433F5 for ; Wed, 19 Jan 2022 21:30:25 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 53C6910E6C2; Wed, 19 Jan 2022 21:30:11 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9BD8B10E20E; Wed, 19 Jan 2022 21:30:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1642627809; x=1674163809; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=D7BAJOEEbWJGUq6J1xH7I9Ict1nLIfBRfoQqmplUEfM=; b=R1mKJ/+2GO6RtWzH/ic5UZIHQ213C5q91psNlfiRng7OE9dSky5y9l5j wf8hZwZ+JXZAMpUy9BONSSb22mVWhN/KCcoGIceVCr9vaG9SGEJ2qPQSt QgpuDR9Sa4HZ+kqHRqm9LWFZNKRihtGhc5zKr1aLYbpvF96aPl1IuNN9E gyE763jnpuH3vbsyHS5tYBo6Jy8JTUAYSX0CAdoY7T38S1mXtql6bFjRM PXqcAqBoWmdeWiT35KCKo03ZyWnNyjDXSMh0/sqDD1f9r8M6OxCGjRSD8 vS1JkVssb0Ly8L81fwkEoAKQyhzx9zPLymloyO1QDryaQvF6jBG050ojw w==; X-IronPort-AV: E=McAfee;i="6200,9189,10231"; a="331548317" X-IronPort-AV: E=Sophos;i="5.88,300,1635231600"; d="scan'208";a="331548317" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jan 2022 13:30:08 -0800 X-IronPort-AV: E=Sophos;i="5.88,300,1635231600"; d="scan'208";a="475289720" Received: from jons-linux-dev-box.fm.intel.com ([10.1.27.20]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jan 2022 13:30:08 -0800 From: Matthew Brost To: , Subject: [PATCH 3/3] drm/i915/guc: Flush G2H handler during a GT reset Date: Wed, 19 Jan 2022 13:24:19 -0800 Message-Id: <20220119212419.23068-4-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220119212419.23068-1-matthew.brost@intel.com> References: <20220119212419.23068-1-matthew.brost@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: john.c.harrison@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Now that the error capture is fully decoupled from fence signalling (request retirement to free memory, which in turn depends on resets) we can safely flush the G2H handler during a GT reset. This is eliminates corner cases where GuC generated G2H (e.g. engine resets) race with a GT reset. v2: (John Harrison) - Fix typo in commit message (s/is/in) Signed-off-by: Matthew Brost Reviewed-by: John Harrison --- .../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 514b3060b141..406dd2e3f5a9 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -1396,8 +1396,6 @@ 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; @@ -1414,21 +1412,7 @@ 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); }