From patchwork Fri Apr 28 16:54:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 9705103 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 6444C602BE for ; Fri, 28 Apr 2017 16:55:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 56EAB28693 for ; Fri, 28 Apr 2017 16:55:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A78728695; Fri, 28 Apr 2017 16:55:00 +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=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E267828691 for ; Fri, 28 Apr 2017 16:54:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1426385AbdD1Qy6 (ORCPT ); Fri, 28 Apr 2017 12:54:58 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:41873 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1424515AbdD1Qy6 (ORCPT ); Fri, 28 Apr 2017 12:54:58 -0400 Received: from pps.filterd (m0001255.ppops.net [127.0.0.1]) by mx0b-00082601.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v3SGpv1f032627; Fri, 28 Apr 2017 09:54:54 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=+2vKo5t0mzS0/XrERidKO4kXY/vUMIyR8sXebFMFPVQ=; b=osuf8s66e2XqBfmzXcFuHFczFZFpZygKvgMDAGMokPrJRVZGbxrIhPgENuL7MakTIfWM LkY0VhScyk9u1SKwiG8llOTlBBqkc1XODW+64JT4oY+RDuHFcyuE1A9S9piO7osSRQhR grAduaLywaw1foJvNeSlUuOuYVXBkJyRbXw= Received: from mail.thefacebook.com ([199.201.64.23]) by mx0b-00082601.pphosted.com with ESMTP id 2a3u65t4pg-9 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 28 Apr 2017 09:54:54 -0700 Received: from localhost.localdomain (192.168.54.13) by mail.thefacebook.com (192.168.16.15) with Microsoft SMTP Server (TLS) id 14.3.319.2; Fri, 28 Apr 2017 09:54:43 -0700 From: Jens Axboe To: CC: , , Jens Axboe Subject: [PATCH 3/6] mtip32xx: abstract out "are any commands active" helper Date: Fri, 28 Apr 2017 10:54:30 -0600 Message-ID: <1493398473-29872-4-git-send-email-axboe@fb.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1493398473-29872-1-git-send-email-axboe@fb.com> References: <1493398473-29872-1-git-send-email-axboe@fb.com> MIME-Version: 1.0 X-Originating-IP: [192.168.54.13] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-28_09:, , signatures=0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is a prep patch for backoff in ->queue_rq() for non-ncq commands. Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/block/mtip32xx/mtip32xx.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 36f3d34f2156..aee94f260725 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -1030,6 +1030,22 @@ static bool mtip_pause_ncq(struct mtip_port *port, return false; } +static bool mtip_commands_active(struct mtip_port *port) +{ + unsigned int active; + unsigned int n; + + /* + * Ignore s_active bit 0 of array element 0. + * This bit will always be set + */ + active = readl(port->s_active[0]) & 0xFFFFFFFE; + for (n = 1; n < port->dd->slot_groups; n++) + active |= readl(port->s_active[n]); + + return active != 0; +} + /* * Wait for port to quiesce * @@ -1043,8 +1059,7 @@ static bool mtip_pause_ncq(struct mtip_port *port, static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) { unsigned long to; - unsigned int n; - unsigned int active = 1; + bool active = true; blk_mq_stop_hw_queues(port->dd->queue); @@ -1061,14 +1076,7 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) if (mtip_check_surprise_removal(port->dd->pdev)) goto err_fault; - /* - * Ignore s_active bit 0 of array element 0. - * This bit will always be set - */ - active = readl(port->s_active[0]) & 0xFFFFFFFE; - for (n = 1; n < port->dd->slot_groups; n++) - active |= readl(port->s_active[n]); - + active = mtip_commands_active(port); if (!active) break; } while (time_before(jiffies, to));