From patchwork Fri Oct 16 13:04:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tejas Joglekar X-Patchwork-Id: 11841701 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 EF41014B5 for ; Fri, 16 Oct 2020 13:05:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BF20D207C4 for ; Fri, 16 Oct 2020 13:05:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="O53Ru/fC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408014AbgJPNFB (ORCPT ); Fri, 16 Oct 2020 09:05:01 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:60876 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408012AbgJPNFA (ORCPT ); Fri, 16 Oct 2020 09:05:00 -0400 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 33A60C088A; Fri, 16 Oct 2020 13:05:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1602853500; bh=4Udne1lH1gThm+TGjds0gt6XwZADS/jIPmac14sXZlY=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=O53Ru/fCAD+qd7AuIUqmJhO/f6yTWHMg1s+88IJsVbB5bLqJQm48QmyJPeh8bk/5K jF+8KQTMgaRw6NTf2kmcqa1I+JaR1swwzh4UxjM7i4jyFhlp/y4keWg5u4UGzKOfoC zn/2ikZ0iXtTCkQIbOm8+YBxUA4b8O4gY+IgYGw0sUpG80W6ozQXtqMJeiQXLEzove IqQieO7FWpOXh1tyshSjTVopO3hcydrfZpW4jl1DnWJSiTzE8WJkX4vYPBxW0hVb+g KHuNfQ6QfkE2lzQgHEL8Ct4vwJtLkVMYzCTUMALvxj7yQ16HKiUjcd2ZaRgbWuAUSm yg4CkapPs20ww== Received: from tejas-VirtualBox (joglekar-e7480.internal.synopsys.com [10.146.27.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mailhost.synopsys.com (Postfix) with ESMTPSA id D36DEA005C; Fri, 16 Oct 2020 13:04:56 +0000 (UTC) Received: by tejas-VirtualBox (sSMTP sendmail emulation); Fri, 16 Oct 2020 18:34:54 +0530 Date: Fri, 16 Oct 2020 18:34:54 +0530 Message-Id: <42caec038cda7cbf358404b86fb5b683f929e2c1.1602853270.git.joglekar@synopsys.com> In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Tejas Joglekar Subject: [PATCH v5 1/3] usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK To: Greg Kroah-Hartman , Tejas Joglekar , linux-usb@vger.kernel.org, Mathias Nyman Cc: John Youn Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This commit uses the private data passed by parent device to set the quirk for Synopsys xHC. This patch fixes the SNPS xHC hang issue when the data is scattered across small buffers which does not make atleast MPS size for given TRB cache size of SNPS xHC. Signed-off-by: Tejas Joglekar --- drivers/usb/host/xhci-plat.c | 3 +++ drivers/usb/host/xhci.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index aa2d35f98200..4d34f6005381 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -333,6 +333,9 @@ static int xhci_plat_probe(struct platform_device *pdev) if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT)) hcd->skip_phy_initialization = 1; + if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK)) + xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK; + ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret) goto disable_usb_phy; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 8be88379c0fb..f8e453a2674d 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1877,6 +1877,7 @@ struct xhci_hcd { #define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35) #define XHCI_RENESAS_FW_QUIRK BIT_ULL(36) #define XHCI_SKIP_PHY_INIT BIT_ULL(37) +#define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(38) unsigned int num_active_eps; unsigned int limit_active_eps;