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=-3.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 447FCC04AAF for ; Tue, 21 May 2019 07:59:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 17D702173C for ; Tue, 21 May 2019 07:59:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="onyOFoYd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726006AbfEUH7i (ORCPT ); Tue, 21 May 2019 03:59:38 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:59518 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725920AbfEUH7i (ORCPT ); Tue, 21 May 2019 03:59:38 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x4L7xXqj072922; Tue, 21 May 2019 02:59:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1558425573; bh=IzWT3e6xVFbiZmSHFjmPBCCwZEObs0gFBMkK0Qxp8bg=; h=From:To:CC:Subject:Date; b=onyOFoYd6iT3zbfUFrP1jChuvkmOzb97Db8+o2dfG3+pdNkb8jHonbpEOYD/98gld ivbuzODleKw4Yhuj+epqWIS3u2uD5zqVAw8bdZ67wshrYaLduB02Hr20a/+5nAneUS AwGMIZAwmsAK1329HQVpIOXBSCS5lhVfi8YL7rBs= Received: from DLEE106.ent.ti.com (dlee106.ent.ti.com [157.170.170.36]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x4L7xWYj051369 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 21 May 2019 02:59:33 -0500 Received: from DLEE103.ent.ti.com (157.170.170.33) by DLEE106.ent.ti.com (157.170.170.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Tue, 21 May 2019 02:59:32 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Tue, 21 May 2019 02:59:32 -0500 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id x4L7xUjx078442; Tue, 21 May 2019 02:59:30 -0500 From: Peter Ujfalusi To: CC: , , , Subject: [PATCH v2 0/2] dmaengine: ti: edma: Polled completion support Date: Tue, 21 May 2019 10:59:43 +0300 Message-ID: <20190521075945.14085-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Hi, Changes since v1: - Cleanup patch for the array register handling - typo fixed in patch2 commit message The code around the array register access was pretty confusing for the first look, so clean them up first then use the cleaner way in the polled handling. When a DMA client driver decides that it is not providing callback for completion of a transfer (and/or does not set the DMA_PREP_INTERRUPT) but it will poll the status of the transfer (in case of short memcpy for example) we will not get interrupt for the completion of the transfer and will not mark the transaction as done. Check the event registers (ER and EER) and if the channel is inactive then return wioth DMA_COMPLETE to let the client know that the transfer is completed. Regards, Peter --- Peter Ujfalusi (2): dmaengine: ti: edma: Clean up the 2x32bit array register accesses dmaengine: ti: edma: Enable support for polled (memcpy) completion drivers/dma/ti/edma.c | 129 ++++++++++++++++++++++++++---------------- 1 file changed, 81 insertions(+), 48 deletions(-) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki