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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 6198DC28D18 for ; Wed, 5 Jun 2019 19:09:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FDA92075C for ; Wed, 5 Jun 2019 19:09:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="mGRP1yv+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726989AbfFETJi (ORCPT ); Wed, 5 Jun 2019 15:09:38 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:49434 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726965AbfFETJg (ORCPT ); Wed, 5 Jun 2019 15:09:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=3bkukSS82+wj1sa4UwaAnaEsPot66Pp1IhVKWWk3PRs=; b=mGRP1yv+6nhs3018nR7FDir6MR yW2KpUdkVXd8h8RkJdDj1tuGagsIAIvpd1VsALfxZ1DkT4wTVouzt7qhx+73meALgT70AlcO5xLHj mTIETncl9oUJn/qpMemeFTJGAcf9Mk/DdNXarbduY3tsrC0BpsrAU63i+ieaDTF+frDi5rUDG95zO q4mlexgv5VIHBxFBUrE5p3dVpmNhgD6qhgXTrM1ZvvIMuwKpIxJce+GwGO3FW3tBca0H74QS1jVrx GVv4fTGrwEQe7jPzVrmoe1J027ZfC4xFWFkAjvSMCJmU9Ie+smQqtLl9B8rKE+HvIybF29GTgGbqf aKajtGeQ==; Received: from 089144193064.atnat0002.highway.a1.net ([89.144.193.64] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hYbHs-0006Cv-4J; Wed, 05 Jun 2019 19:09:28 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Sebastian Ott , Sagi Grimberg , Max Gurtovoy , Bart Van Assche , Ulf Hansson , Alan Stern , Oliver Neukum , linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, linux-hyperv@vger.kernel.org, linux-usb@vger.kernel.org, usb-storage@lists.one-eyed-alien.net, linux-kernel@vger.kernel.org Subject: [PATCH 13/13] uas: set virt_boundary_mask in the scsi host Date: Wed, 5 Jun 2019 21:08:36 +0200 Message-Id: <20190605190836.32354-14-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190605190836.32354-1-hch@lst.de> References: <20190605190836.32354-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This ensures all proper DMA layer handling is taken care of by the SCSI midlayer. Signed-off-by: Christoph Hellwig --- drivers/usb/storage/uas.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 047c5922618f..d20919e7bbf4 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -789,29 +789,9 @@ static int uas_slave_alloc(struct scsi_device *sdev) { struct uas_dev_info *devinfo = (struct uas_dev_info *)sdev->host->hostdata; - int maxp; sdev->hostdata = devinfo; - /* - * We have two requirements here. We must satisfy the requirements - * of the physical HC and the demands of the protocol, as we - * definitely want no additional memory allocation in this path - * ruling out using bounce buffers. - * - * For a transmission on USB to continue we must never send - * a package that is smaller than maxpacket. Hence the length of each - * scatterlist element except the last must be divisible by the - * Bulk maxpacket value. - * If the HC does not ensure that through SG, - * the upper layer must do that. We must assume nothing - * about the capabilities off the HC, so we use the most - * pessimistic requirement. - */ - - maxp = usb_maxpacket(devinfo->udev, devinfo->data_in_pipe, 0); - blk_queue_virt_boundary(sdev->request_queue, maxp - 1); - /* * The protocol has no requirements on alignment in the strict sense. * Controllers may or may not have alignment restrictions. @@ -1004,6 +984,22 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) */ shost->can_queue = devinfo->qdepth - 2; + /* + * We have two requirements here. We must satisfy the requirements of + * the physical HC and the demands of the protocol, as we definitely + * want no additional memory allocation in this path ruling out using + * bounce buffers. + * + * For a transmission on USB to continue we must never send a package + * that is smaller than maxpacket. Hence the length of each scatterlist + * element except the last must be divisible by the Bulk maxpacket + * value. If the HC does not ensure that through SG, the upper layer + * must do that. We must assume nothing about the capabilities off the + * HC, so we use the most pessimistic requirement. + */ + shost->virt_boundary_mask = + usb_maxpacket(udev, devinfo->data_in_pipe, 0) - 1; + usb_set_intfdata(intf, shost); result = scsi_add_host(shost, &intf->dev); if (result) -- 2.20.1