From patchwork Tue Jun 16 12:34:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Macpaul Lin X-Patchwork-Id: 11607325 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6975560D for ; Tue, 16 Jun 2020 12:34:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D48620734 for ; Tue, 16 Jun 2020 12:34:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="JCHVluwv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726799AbgFPMe6 (ORCPT ); Tue, 16 Jun 2020 08:34:58 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:62858 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726452AbgFPMe6 (ORCPT ); Tue, 16 Jun 2020 08:34:58 -0400 X-UUID: c02764eaeb6245f7bd17e571a64225b0-20200616 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=1y6jYCU5bn8D2X7/K/Tvzzlj7X36JuNHASO4pxrPu4w=; b=JCHVluwvubnAC79HGWfxQzzbZHBAdnggu2+TvgzBhgLQH4zt6HkdYKRLcHgEjSFP1988uVhl5+eAJEQbL0bMrRiwaP9khpc8Xbb1LkhQmOc+g1uDNSo0O1yVDknyGEbVlrFM/wekguEQ6endFEJxhF6jHvaNLC1NPDBnivckaFE=; X-UUID: c02764eaeb6245f7bd17e571a64225b0-20200616 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1283620589; Tue, 16 Jun 2020 20:34:54 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 16 Jun 2020 20:34:45 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 16 Jun 2020 20:34:45 +0800 From: Macpaul Lin To: Chunfeng Yun , Greg Kroah-Hartman , Felipe Balbi , Matthias Brugger , =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= , Sergey Organov , Fabrice Gasnier , , , , CC: Mediatek WSD Upstream , Macpaul Lin , Macpaul Lin Subject: [PATCH 1/2] usb: gadget: introduce flag for large request Date: Tue, 16 Jun 2020 20:34:43 +0800 Message-ID: <1592310884-4307-1-git-send-email-macpaul.lin@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some USB hardware like DMA engine can help to process (split) the data of each URB request into small packets. For example, the max packet size of high speed is 512 bytes. These kinds of hardware can help to split the continue Tx/Rx data requests into packets just at the max packet size during transmission. Hence upper layer software can reduce some effort for queueing many requests back and forth for larger data. Here we introduce "can_exceed_maxp" flag in gadget when these kinds of hardware is ready to support these operations. Signed-off-by: Macpaul Lin --- drivers/usb/mtu3/mtu3_qmu.c | 11 ++++++++++- include/linux/usb/gadget.h | 1 + 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index 3f414f9..2b51a20 100644 --- a/drivers/usb/mtu3/mtu3_qmu.c +++ b/drivers/usb/mtu3/mtu3_qmu.c @@ -620,7 +620,7 @@ irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu) int mtu3_qmu_init(struct mtu3 *mtu) { - + int i; compiletime_assert(QMU_GPD_SIZE == 16, "QMU_GPD size SHOULD be 16B"); mtu->qmu_gpd_pool = dma_pool_create("QMU_GPD", mtu->dev, @@ -629,10 +629,19 @@ int mtu3_qmu_init(struct mtu3 *mtu) if (!mtu->qmu_gpd_pool) return -ENOMEM; + /* Let gadget know we can process request larger than max packet */ + for (i = 1; i < mtu->num_eps; i++) + mtu->ep_array[i].ep.can_exceed_maxp = 1; + return 0; } void mtu3_qmu_exit(struct mtu3 *mtu) { + int i; dma_pool_destroy(mtu->qmu_gpd_pool); + + /* Disable large request support */ + for (i = 1; i < mtu->num_eps; i++) + mtu->ep_array[i].ep.can_exceed_maxp = 0; } diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 6a17817..60e0645 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -236,6 +236,7 @@ struct usb_ep { unsigned max_streams:16; unsigned mult:2; unsigned maxburst:5; + unsigned can_exceed_maxp:1; u8 address; const struct usb_endpoint_descriptor *desc; const struct usb_ss_ep_comp_descriptor *comp_desc;