From nobody Thu Nov 28 20:39:02 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 72EF51474B5; Fri, 27 Sep 2024 20:01:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727467309; cv=none; b=PevSOg1sQIJn81HRxVvpGG5HkrybMCteFTfe+kOpgzDj6iIYPkdpBrWVKLbOKHlqg9A9/yo5u93md051KAbleoghjFqVelEYFbCA+ksPCNThzwVPvc29jytqLb11lxJ5JGahBgjiCTzaMlDyY/iRWq7PkFwAATg2L18J7CeEwZA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727467309; c=relaxed/simple; bh=11FvQvVXpaqDbgp/b53D1t2JXve7XhlDytqm6uJ6IoA=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=TKvCCrGMkT1wTNwVn+Fyv2EeEJUahcLPHr+mi2dDs9V0LtEzQ3SCOojhA23eR572tiRV9HnCCOV8eKaNSrSZ+g7wGCaTYfYt9Jg8vkWwtGYsph149/vxBcDx1se6sGDNxyRcjMysjmwOSYzm03UcvIEy54Nct2LJhyyolisWZkw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=OZhhuBD+; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="OZhhuBD+" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48RGaE1S026541; Fri, 27 Sep 2024 20:00:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=qcppdkim1; bh=nhINB1xMacCu66SjMnFSJo NBhLUvyaCk83CZgr3I6+g=; b=OZhhuBD+mh0ZfLjON8dBCtBkFy3VhMQZePgu+C EG5HR0RtIlHt9XZON3nYkWQDDlt7s4q6kYStynF8Q2/ckLzhD+WfseDN+IEfWsMC gZ04fdwpZdawBvPG1+F8m0DoiXHuEhyRVwI3sL0BKP/VFWfFkX0Ye988gAZao5Ow 8bj3PgtrMTUXRxFLEPlUvX8vWFJKxxMZQkKQvSQmP0yeX59ppHJLEctTnfkNgz0L E/sHjS82wjas12QN0IzeslD1ZaEn0WJxFE7V71FGrGhChXE32Qj5vXDGanDzJyqE 00eeXdS20T9fSGLl8vjmvmEWdWbIExVCF1BmFKfvKYzC2IjA== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 41sn5c44js-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 27 Sep 2024 20:00:30 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 48RK0T09010834 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 27 Sep 2024 20:00:29 GMT Received: from hu-akakum-hyd.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Fri, 27 Sep 2024 13:00:21 -0700 From: Akash Kumar To: Thinh Nguyen , Greg Kroah-Hartman , Jing Leng , Felipe Balbi , Jack Pham , , Wesley Cheng , Laurent Pinchart , Daniel Scally CC: Vijayavardhan Vennapusa , Krishna Kurapati , , , Akash Kumar Subject: [PATCH v5] usb: dwc3: gadget: Refine the logic for resizing Tx FIFOs Date: Sat, 28 Sep 2024 01:29:31 +0530 Message-ID: <20240927195931.10404-1-quic_akakum@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: QQToKkZCANCB7g-XiZKU0QXItQbvwbVG X-Proofpoint-GUID: QQToKkZCANCB7g-XiZKU0QXItQbvwbVG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 adultscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 mlxscore=0 priorityscore=1501 bulkscore=0 phishscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409270146 The current logic is rigid, setting num_fifos to fixed values. 3 for any maxburst greater than 1. tx_fifo_resize_max_num for maxburst greater than 6. Additionally, it did not differentiate much between bulk and isochronous transfers, applying similar logic to both. The updated logic is more flexible and specifically designed to meet the unique requirements of both bulk and isochronous transfers. We have made every effort to satisfy all needs and requirements, verified on our specific platform and application. The updated logic is more flexible and specifically designed to meet the unique requirements of both bulk and isochronous transfers. We have made every effort to satisfy all needs and requirements, verified on our specific platform and application. Bulk Transfers: Ensures that num_fifos is optimized by considering both the maxburst and DT property tx_fifo_resize_max_num for super speed and above. For high-speed and below bulk endpoints, a 2K TxFIFO allocation is used to meet efficient data transfer needs, considering FIFO-constrained platforms. Isochronous Transfers: Ensures that num_fifos is sufficient by considering the maximum packet multiplier for HS and maxburst for SS, along with a constraint with the DT property tx_fifo_resize_max_num. This change aims to optimize the allocation of Tx FIFOs for both bulk and isochronous endpoints, potentially improving data transfer efficiency and overall performance. It also enhances support for all use cases, which can be tweaked with DT parameters and the endpoint=E2=80=99s maxburst= and maxpacket. Signed-off-by: Akash Kumar --- Changes for v5: Update Calculation for HS and below bulk and isoc eps based on suggestion and fixed at 2k for bulk eps considering fifo constrained platforms. Changes for v4: Updated commit message as per review comments to clarify that it has been tested on specific platforms only and tried best to match all expectations. Changes for v3: Redefine logic for resizing tx fifos,added check based on operating speed and used maxp for HS and maxburst for SS and defined max allocation based on dt property. Changes for v2: Redefine logic for resizing tx fifos, handled fifo based on minimum of maxp and maxburts. Changes for v1: Added additional condition to allocate tx fifo for hs isoc eps, keeping the other resize logic same. --- drivers/usb/dwc3/gadget.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 291bc549935b..035d49155d57 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -771,15 +771,21 @@ static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep= *dep) =20 ram1_depth =3D DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); =20 - if ((dep->endpoint.maxburst > 1 && - usb_endpoint_xfer_bulk(dep->endpoint.desc)) || - usb_endpoint_xfer_isoc(dep->endpoint.desc)) - num_fifos =3D 3; + if (dwc->gadget->speed <=3D USB_SPEED_HIGH) { + if (usb_endpoint_xfer_bulk(dep->endpoint.desc)) + num_fifos =3D 2; + if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) + num_fifos =3D min_t(unsigned int, + usb_endpoint_maxp_mult(dep->endpoint.desc) + 1, + dwc->tx_fifo_resize_max_num); + } =20 - if (dep->endpoint.maxburst > 6 && + if (dwc->gadget->speed > USB_SPEED_HIGH && (usb_endpoint_xfer_bulk(dep->endpoint.desc) || - usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31)) - num_fifos =3D dwc->tx_fifo_resize_max_num; + usb_endpoint_xfer_isoc(dep->endpoint.desc))) + num_fifos =3D min_t(unsigned int, + dep->endpoint.maxburst, + dwc->tx_fifo_resize_max_num); =20 /* FIFO size for a single buffer */ fifo =3D dwc3_gadget_calc_tx_fifo_size(dwc, 1); --=20 2.17.1