From patchwork Mon Apr 17 02:51:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 675569 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B428C77B7F for ; Mon, 17 Apr 2023 02:52:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229945AbjDQCwT (ORCPT ); Sun, 16 Apr 2023 22:52:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229674AbjDQCwR (ORCPT ); Sun, 16 Apr 2023 22:52:17 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C3681726; Sun, 16 Apr 2023 19:52:14 -0700 (PDT) X-UUID: d74b9ed4dcca11edb6b9f13eb10bd0fe-20230417 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=ejR+XuzhyQVgZP+TJeLCfwXAB17U9qlUN9dfvgvCkck=; b=CiWs7+3iWV4KsaTwoGgxYf+BSUTOO6lryBUFYloulVcG5QbkmggCTPA0Wzzos+nivP2Bl0twgbn3A1NZWUbzQvF8WraIrZI6KxrtrMjYGNNv1WVz3sq52E0pYORXDAXvdn4orBNLMq2Rgf7XUduG4fEKw5tubKCUx81J5pFONgk=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22, REQID:1ee975f6-1929-4c2c-9898-dbf6b65dc5c8, IP:0, U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:120426c, CLOUDID:191628eb-db6f-41fe-8b83-13fe7ed1ef52, B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: d74b9ed4dcca11edb6b9f13eb10bd0fe-20230417 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1739159041; Mon, 17 Apr 2023 10:52:07 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Mon, 17 Apr 2023 10:52:05 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Mon, 17 Apr 2023 10:52:05 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Rob Herring CC: Chunfeng Yun , Krzysztof Kozlowski , Matthias Brugger , AngeloGioacchino Del Regno , , , , , , Tianping Fang Subject: [PATCH v3 1/7] usb: mtu3: give back request when rx error happens Date: Mon, 17 Apr 2023 10:51:57 +0800 Message-ID: <20230417025203.18097-1-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When the Rx enconnter errors, currently, only print error logs, that may cause class driver's RX halt, shall give back the request with error status meanwhile. Signed-off-by: Chunfeng Yun --- v3: no changes v2: remove @req suggested by AngeloGioacchino --- drivers/usb/mtu3/mtu3_qmu.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index a2fdab8b63b2..a4da1af0b2c0 100644 --- a/drivers/usb/mtu3/mtu3_qmu.c +++ b/drivers/usb/mtu3/mtu3_qmu.c @@ -466,6 +466,37 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum) mtu3_qmu_resume(mep); } +/* + * when rx error happens (except zlperr), QMU will stop, and RQCPR saves + * the GPD encountered error, Done irq will arise after resuming QMU again. + */ +static void qmu_error_rx(struct mtu3 *mtu, u8 epnum) +{ + struct mtu3_ep *mep = mtu->out_eps + epnum; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + struct qmu_gpd *gpd_current = NULL; + struct mtu3_request *mreq; + dma_addr_t cur_gpd_dma; + + cur_gpd_dma = read_rxq_cur_addr(mtu->mac_base, epnum); + gpd_current = gpd_dma_to_virt(ring, cur_gpd_dma); + + mreq = next_request(mep); + if (!mreq || mreq->gpd != gpd_current) { + dev_err(mtu->dev, "no correct RX req is found\n"); + return; + } + + mreq->request.status = -EAGAIN; + + /* by pass the current GDP */ + gpd_current->dw0_info |= cpu_to_le32(GPD_FLAGS_BPS | GPD_FLAGS_HWO); + mtu3_qmu_resume(mep); + + dev_dbg(mtu->dev, "%s EP%d, current=%p, req=%p\n", + __func__, epnum, gpd_current, mreq); +} + /* * NOTE: request list maybe is already empty as following case: * queue_tx --> qmu_interrupt(clear interrupt pending, schedule tasklet)--> @@ -571,14 +602,18 @@ static void qmu_exception_isr(struct mtu3 *mtu, u32 qmu_status) if ((qmu_status & RXQ_CSERR_INT) || (qmu_status & RXQ_LENERR_INT)) { errval = mtu3_readl(mbase, U3D_RQERRIR0); + mtu3_writel(mbase, U3D_RQERRIR0, errval); + for (i = 1; i < mtu->num_eps; i++) { if (errval & QMU_RX_CS_ERR(i)) dev_err(mtu->dev, "Rx %d CS error!\n", i); if (errval & QMU_RX_LEN_ERR(i)) dev_err(mtu->dev, "RX %d Length error\n", i); + + if (errval & (QMU_RX_CS_ERR(i) | QMU_RX_LEN_ERR(i))) + qmu_error_rx(mtu, i); } - mtu3_writel(mbase, U3D_RQERRIR0, errval); } if (qmu_status & RXQ_ZLPERR_INT) {