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=-6.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 47DD4C072B1 for ; Thu, 30 May 2019 04:33:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 207A825703 for ; Thu, 30 May 2019 04:33:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559190785; bh=ZHEtNDfR/QT50PNn2KzsiynEhrp0uaN1i7z4WEqqhNU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pS/nayEG6G4UiizSr61Dfjex6D7Z+ZOThKCmOw9ii12j0DTy1RpuKw48t23HeCXAS QowOCwQ3wDhHO3vk1w6n9zsjB8jJAYFrekom50J3GyZJzitHrh5ytbv4hpAQLWiRt9 ryVG06NML5mdO9jzUM2N8THQLLuhtG1RokMmVlvE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729499AbfE3DNc (ORCPT ); Wed, 29 May 2019 23:13:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:58866 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729484AbfE3DNb (ORCPT ); Wed, 29 May 2019 23:13:31 -0400 Received: from localhost (ip67-88-213-2.z213-88-67.customer.algx.net [67.88.213.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 643ED24502; Thu, 30 May 2019 03:13:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559186010; bh=ZHEtNDfR/QT50PNn2KzsiynEhrp0uaN1i7z4WEqqhNU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=meLpF/KTKiw3cXRXEU3mWQzbZPeujvi0S27QVTiqhbCerAkJp6yGGL/7l23hfEn5J 0cprZM+SxO8SS0an4TBBz+I5ri7r+2MFpOUVKDMS747GDAECPDv/fCIf7jP6MQPrB9 59F240eo9Y3Oh9lyxdOyvSWBTTqueQPIKPwA/Wjw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Minas Harutyunyan , Felipe Balbi , Sasha Levin Subject: [PATCH 5.0 063/346] usb: dwc2: gadget: Increase descriptors count for ISOCs Date: Wed, 29 May 2019 20:02:16 -0700 Message-Id: <20190530030544.255087781@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190530030540.363386121@linuxfoundation.org> References: <20190530030540.363386121@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 54f37f56631747075f1f9a2f0edf6ba405e3e66c ] Some function drivers queueing more than 128 ISOC requests at a time. To avoid "descriptor chain full" cases, increasing descriptors count from MAX_DMA_DESC_NUM_GENERIC to MAX_DMA_DESC_NUM_HS_ISOC for ISOC's only. Signed-off-by: Minas Harutyunyan Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/dwc2/gadget.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 55ef3cc2701b9..f541274732397 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -714,13 +714,11 @@ static unsigned int dwc2_gadget_get_chain_limit(struct dwc2_hsotg_ep *hs_ep) unsigned int maxsize; if (is_isoc) - maxsize = hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_LIMIT : - DEV_DMA_ISOC_RX_NBYTES_LIMIT; + maxsize = (hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_LIMIT : + DEV_DMA_ISOC_RX_NBYTES_LIMIT) * + MAX_DMA_DESC_NUM_HS_ISOC; else - maxsize = DEV_DMA_NBYTES_LIMIT; - - /* Above size of one descriptor was chosen, multiple it */ - maxsize *= MAX_DMA_DESC_NUM_GENERIC; + maxsize = DEV_DMA_NBYTES_LIMIT * MAX_DMA_DESC_NUM_GENERIC; return maxsize; } @@ -903,7 +901,7 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep, /* Update index of last configured entry in the chain */ hs_ep->next_desc++; - if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_GENERIC) + if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_HS_ISOC) hs_ep->next_desc = 0; return 0; @@ -935,7 +933,7 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) } /* Initialize descriptor chain by Host Busy status */ - for (i = 0; i < MAX_DMA_DESC_NUM_GENERIC; i++) { + for (i = 0; i < MAX_DMA_DESC_NUM_HS_ISOC; i++) { desc = &hs_ep->desc_list[i]; desc->status = 0; desc->status |= (DEV_DMA_BUFF_STS_HBUSY @@ -2122,7 +2120,7 @@ static void dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep) dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); hs_ep->compl_desc++; - if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_GENERIC - 1)) + if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_HS_ISOC - 1)) hs_ep->compl_desc = 0; desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status; } @@ -3859,6 +3857,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, unsigned int i, val, size; int ret = 0; unsigned char ep_type; + int desc_num; dev_dbg(hsotg->dev, "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", @@ -3905,11 +3904,15 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n", __func__, epctrl, epctrl_reg); + if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC) + desc_num = MAX_DMA_DESC_NUM_HS_ISOC; + else + desc_num = MAX_DMA_DESC_NUM_GENERIC; + /* Allocate DMA descriptor chain for non-ctrl endpoints */ if (using_desc_dma(hsotg) && !hs_ep->desc_list) { hs_ep->desc_list = dmam_alloc_coherent(hsotg->dev, - MAX_DMA_DESC_NUM_GENERIC * - sizeof(struct dwc2_dma_desc), + desc_num * sizeof(struct dwc2_dma_desc), &hs_ep->desc_list_dma, GFP_ATOMIC); if (!hs_ep->desc_list) { ret = -ENOMEM; @@ -4051,7 +4054,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, error2: if (ret && using_desc_dma(hsotg) && hs_ep->desc_list) { - dmam_free_coherent(hsotg->dev, MAX_DMA_DESC_NUM_GENERIC * + dmam_free_coherent(hsotg->dev, desc_num * sizeof(struct dwc2_dma_desc), hs_ep->desc_list, hs_ep->desc_list_dma); hs_ep->desc_list = NULL; -- 2.20.1