From patchwork Wed May 29 08:37:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 10966499 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4C4076 for ; Wed, 29 May 2019 08:37:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C2A9E28795 for ; Wed, 29 May 2019 08:37:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B6A3328889; Wed, 29 May 2019 08:37:41 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,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 4639428795 for ; Wed, 29 May 2019 08:37:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725948AbfE2Ihk (ORCPT ); Wed, 29 May 2019 04:37:40 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:47626 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725917AbfE2Ihk (ORCPT ); Wed, 29 May 2019 04:37:40 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id x4T8b6G2013179; Wed, 29 May 2019 03:37:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1559119026; bh=wv91vppiNCnts7PhrSMc8dj3+Ppj0UtKwTnbDQl9lhk=; h=From:To:CC:Subject:Date; b=vw9UGOUw3GL067S3a3vkN2D8vXKQ97o7XT3kTKt+6NWSCnOpRGkNdOIkc4VlPg84a iiVqyV5Nv0ZXiPpT+c0VjI8XVoquL6wD/iWJXHUtLXRGoFa3+wncp3PMqo+6oXE3Wc OstYcNZOLrt1zoqARLJtgmXiJNZvJMUhTqv1wNvk= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x4T8b56A092333 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 29 May 2019 03:37:05 -0500 Received: from DLEE106.ent.ti.com (157.170.170.36) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Wed, 29 May 2019 03:37:04 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) 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 via Frontend Transport; Wed, 29 May 2019 03:37:04 -0500 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x4T8b2EV072804; Wed, 29 May 2019 03:37:03 -0500 From: Peter Ujfalusi To: CC: , , Subject: [PATCH] dmaengine: dmatest: Add support for completion polling Date: Wed, 29 May 2019 11:37:24 +0300 Message-ID: <20190529083724.18182-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 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 X-Virus-Scanned: ClamAV using ClamSMTP With the polled parameter the DMA drivers can be tested if they can work correctly when no completion is requested (no DMA_PREP_INTERRUPT and no callback is provided). If polled mode is selected then use dma_sync_wait() to execute the test iteration instead of relying on the completion callback. Signed-off-by: Peter Ujfalusi --- drivers/dma/dmatest.c | 35 ++++++++++++++++++++++++++++------- 1 file changed, 28 insertions(+), 7 deletions(-) diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index b96814a7dceb..088086d041e9 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -75,6 +75,10 @@ static bool norandom; module_param(norandom, bool, 0644); MODULE_PARM_DESC(norandom, "Disable random offset setup (default: random)"); +static bool polled; +module_param(polled, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(polled, "Use polling for completion instead of interrupts"); + static bool verbose; module_param(verbose, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)"); @@ -113,6 +117,7 @@ struct dmatest_params { bool norandom; int alignment; unsigned int transfer_size; + bool polled; }; /** @@ -654,7 +659,10 @@ static int dmatest_func(void *data) /* * src and dst buffers are freed by ourselves below */ - flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; + if (params->polled) + flags = DMA_CTRL_ACK; + else + flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; ktime = ktime_get(); while (!kthread_should_stop() @@ -783,8 +791,10 @@ static int dmatest_func(void *data) } done->done = false; - tx->callback = dmatest_callback; - tx->callback_param = done; + if (!params->polled) { + tx->callback = dmatest_callback; + tx->callback_param = done; + } cookie = tx->tx_submit(tx); if (dma_submit_error(cookie)) { @@ -793,12 +803,22 @@ static int dmatest_func(void *data) msleep(100); goto error_unmap_continue; } - dma_async_issue_pending(chan); - wait_event_freezable_timeout(thread->done_wait, done->done, - msecs_to_jiffies(params->timeout)); + if (params->polled) { + status = dma_sync_wait(chan, cookie); + dmaengine_terminate_sync(chan); + if (status == DMA_COMPLETE) + done->done = true; + } else { + dma_async_issue_pending(chan); + + wait_event_freezable_timeout(thread->done_wait, + done->done, + msecs_to_jiffies(params->timeout)); - status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); + status = dma_async_is_tx_complete(chan, cookie, NULL, + NULL); + } if (!done->done) { result("test timed out", total_tests, src->off, dst->off, @@ -1068,6 +1088,7 @@ static void add_threaded_test(struct dmatest_info *info) params->norandom = norandom; params->alignment = alignment; params->transfer_size = transfer_size; + params->polled = polled; request_channels(info, DMA_MEMCPY); request_channels(info, DMA_MEMSET);