From patchwork Thu Aug 4 10:28:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 9263359 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 CF5E360839 for ; Thu, 4 Aug 2016 10:31:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C046E28333 for ; Thu, 4 Aug 2016 10:31:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B52A6283AC; Thu, 4 Aug 2016 10:31:34 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3C50E28333 for ; Thu, 4 Aug 2016 10:31:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bVFud-0000ha-40; Thu, 04 Aug 2016 10:30:03 +0000 Received: from arroyo.ext.ti.com ([198.47.19.12]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bVFu8-0000BY-J8 for linux-arm-kernel@lists.infradead.org; Thu, 04 Aug 2016 10:29:38 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id u74AT3r3001057; Thu, 4 Aug 2016 05:29:03 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id u74AT2HY015009; Thu, 4 Aug 2016 05:29:03 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.294.0; Thu, 4 Aug 2016 05:29:02 -0500 Received: from gomoku.home (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id u74ASu7Y032023; Thu, 4 Aug 2016 05:29:00 -0500 From: Tero Kristo To: , , , , , Subject: [PATCHv3 01/11] crypto: omap-sham: avoid executing tasklet where not needed Date: Thu, 4 Aug 2016 13:28:36 +0300 Message-ID: <1470306526-27219-2-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1470306526-27219-1-git-send-email-t-kristo@ti.com> References: <1470306526-27219-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160804_032932_850723_24912308 X-CRM114-Status: GOOD ( 12.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Some of the call paths of OMAP SHA driver can avoid executing the next step of the crypto queue under tasklet; instead, execute the next step directly via function call. This avoids a costly round-trip via the scheduler giving a slight performance boost. Signed-off-by: Tero Kristo --- drivers/crypto/omap-sham.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 7fe4eef..fd50005 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -1005,9 +1005,6 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) if (req->base.complete) req->base.complete(&req->base, err); - - /* handle new request */ - tasklet_schedule(&dd->done_task); } static int omap_sham_handle_queue(struct omap_sham_dev *dd, @@ -1018,6 +1015,7 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd, unsigned long flags; int err = 0, ret = 0; +retry: spin_lock_irqsave(&dd->lock, flags); if (req) ret = ahash_enqueue_request(&dd->queue, req); @@ -1061,11 +1059,19 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd, err = omap_sham_final_req(dd); } err1: - if (err != -EINPROGRESS) + dev_dbg(dd->dev, "exit, err: %d\n", err); + + if (err != -EINPROGRESS) { /* done_task will not finish it, so do it here */ omap_sham_finish_req(req, err); + req = NULL; - dev_dbg(dd->dev, "exit, err: %d\n", err); + /* + * Execute next request immediately if there is anything + * in queue. + */ + goto retry; + } return ret; } @@ -1653,6 +1659,10 @@ finish: dev_dbg(dd->dev, "update done: err: %d\n", err); /* finish curent request */ omap_sham_finish_req(dd->req, err); + + /* If we are not busy, process next req */ + if (!test_bit(FLAGS_BUSY, &dd->flags)) + omap_sham_handle_queue(dd, NULL); } static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)