From patchwork Tue Apr 16 11:49:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souptick Joarder X-Patchwork-Id: 10902795 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5913614DB for ; Tue, 16 Apr 2019 11:47:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 44AFF2863D for ; Tue, 16 Apr 2019 11:47:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 36AF12899B; Tue, 16 Apr 2019 11:47:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E06E12863D for ; Tue, 16 Apr 2019 11:47:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729041AbfDPLq4 (ORCPT ); Tue, 16 Apr 2019 07:46:56 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:42001 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725787AbfDPLqz (ORCPT ); Tue, 16 Apr 2019 07:46:55 -0400 Received: by mail-pf1-f196.google.com with SMTP id w25so10277604pfi.9; Tue, 16 Apr 2019 04:46:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=cNyFM0J2DfW9voxw9FzV7E7Y/LrzsWkGDKLqwe0d5pk=; b=oeEcKFpL3vmK9+DpAkDM2pqJ4cwz8D1E2liXXkVcMS/mCROTNxreZ3tJiZU7AMhYGa jdvIuxFSG51quKMSoG7eGUWo0OFVjsfwlsv0j6QgATWKo4Y/zRlxt4YEDfEpCBvwBcDU oLh7KOdm3sUnBXGsWZumlJIoubWl0FlACsdqSTDMD22x9YueAbdJduUdqxf+Fzo+qE4b G/2XochB6n9yIyfIIw7vwaFhmKiDJzF2ILx3ft6jONO/3Tp5olQ3mZrspX0N7+OtxUzw L3gftE9ttJboi/nhCsZ8IHvh1byiu+1G+2wjx/i6t9Le5dXmn/WMY4e9g4nRHdsI6qmW KGJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=cNyFM0J2DfW9voxw9FzV7E7Y/LrzsWkGDKLqwe0d5pk=; b=fc3QeohuCKOjnTcS+mSS2L8jVA6sxY+DPiIhZDW4jN9c++rstgwdMSkILrA+1D6Bju htCHmcC9fCb5bCith6e7K1TLwDF0b+baXmayj2/VQwqKcHg1DtcokCX+avtWJwXbzQR1 +X1zXbZwttVCrp0GLiwFrFw687yui65bbO3yK8wTiXQK22iuUpnxmXVzilb/FenodViB MrPxt80Ip/iIHLuUIlC+pkcqYdhPjn3A2yPRpw8YirD30DIAuj1MgGtqXW/aUTArrPhX Vt3QILNZuN26qrnaO6wQhKjhBqCfP8ainnooN+FL8DFdU3dpM5Dm3Wm02ts58kl13Gne cZug== X-Gm-Message-State: APjAAAV1afdhR+X3q15iYXVN1TX+AvWgF5bTZutdQOw+tp9myC53QDEN OzbKXZ7SPMth1Kz8ka8ApMA= X-Google-Smtp-Source: APXvYqzT/G52JjPlhhzDjlzXSHHg4UNZ4b12u0OW4Mw/nQ9ugBF4FdGP/KIWXfE/EW5Pz1mzLpMj5g== X-Received: by 2002:a62:6ec6:: with SMTP id j189mr346760pfc.195.1555415215118; Tue, 16 Apr 2019 04:46:55 -0700 (PDT) Received: from jordon-HP-15-Notebook-PC.domain.name ([49.207.50.11]) by smtp.gmail.com with ESMTPSA id p6sm55942835pfd.122.2019.04.16.04.46.45 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 16 Apr 2019 04:46:54 -0700 (PDT) From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, vbabka@suse.cz, riel@surriel.com, sfr@canb.auug.org.au, rppt@linux.vnet.ibm.com, peterz@infradead.org, linux@armlinux.org.uk, robin.murphy@arm.com, iamjoonsoo.kim@lge.com, treding@nvidia.com, keescook@chromium.org, m.szyprowski@samsung.com, stefanr@s5r6.in-berlin.de, hjc@rock-chips.com, heiko@sntech.de, airlied@linux.ie, oleksandr_andrushchenko@epam.com, joro@8bytes.org, pawel@osciak.com, kyungmin.park@samsung.com, mchehab@kernel.org, boris.ostrovsky@oracle.com, jgross@suse.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux1394-devel@lists.sourceforge.net, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xen.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org, Souptick Joarder Subject: [REBASE PATCH v5 2/9] arm: mm: dma-mapping: Convert to use vm_map_pages() Date: Tue, 16 Apr 2019 17:19:43 +0530 Message-Id: <936e5e107c746a7310e3a3c471188ca3ac8f9754.1552921225.git.jrdr.linux@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Convert to use vm_map_pages() to map range of kernel memory to user vma. Signed-off-by: Souptick Joarder --- arch/arm/mm/dma-mapping.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index f1e2922..de7c76e 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1575,31 +1575,21 @@ static int __arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { - unsigned long uaddr = vma->vm_start; - unsigned long usize = vma->vm_end - vma->vm_start; struct page **pages = __iommu_get_pages(cpu_addr, attrs); unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; - unsigned long off = vma->vm_pgoff; + int err; if (!pages) return -ENXIO; - if (off >= nr_pages || (usize >> PAGE_SHIFT) > nr_pages - off) + if (vma->vm_pgoff >= nr_pages) return -ENXIO; - pages += off; - - do { - int ret = vm_insert_page(vma, uaddr, *pages++); - if (ret) { - pr_err("Remapping memory failed: %d\n", ret); - return ret; - } - uaddr += PAGE_SIZE; - usize -= PAGE_SIZE; - } while (usize > 0); + err = vm_map_pages(vma, pages, nr_pages); + if (err) + pr_err("Remapping memory failed: %d\n", err); - return 0; + return err; } static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,