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=-8.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 A5D8DC282CA for ; Wed, 13 Feb 2019 14:02:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B721222B2 for ; Wed, 13 Feb 2019 14:02:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UaWlJOzz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728604AbfBMOCT (ORCPT ); Wed, 13 Feb 2019 09:02:19 -0500 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37697 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728131AbfBMOCT (ORCPT ); Wed, 13 Feb 2019 09:02:19 -0500 Received: by mail-pf1-f194.google.com with SMTP id s22so1188630pfh.4; Wed, 13 Feb 2019 06:02:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=36ygGGspzW8ypHYiojY4a19UR4qM+LFcK/AqwiiUnW8=; b=UaWlJOzz2ackVhNOEvTqRw+g7Q14CaWnQ5phD4+k34kKDiE9XAWdWrP6lxAcqDMcvH p1OYorR9lI0kR7DF/nsC4Iva2MUsOFIMPpxB0Xsv+IASFBtbVveFkKFfs7sbkLKaL5wK nB+jiIWQqNj3h9M3nWz1Yrk9TsksXTTt4BFP0yi7/VdcRwMLi+bsr6AvqWhlkUCJW2Qs U5cF/pkP+EGIQa3j2lsEqx13cbFeaztLJVcs9Vw+lksumAaSB4eyHICi3e+WfVP1lFoE hCtHOhFv/ivO6OJE2oR8V7hYcI0/IBQ7sxv0LS9gg/dUVb493geb6vxkVWhZWRVdgHL1 Lprg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=36ygGGspzW8ypHYiojY4a19UR4qM+LFcK/AqwiiUnW8=; b=hIZYBhtEyrWvjWU8co/aCWkc+pPFRMsD+PnbpJxbXMDFbfZCi9TlgBfMBkm8qKUyCs 2TpTNLvsRlIvF+Segez89LdoLBpD7Sa8NrYY+7BduTv1NSSwZclw/9YvvVe+cj7beZ3a jfPblVQAD+ALZsyb4ZOD/l+0AxW83k+7/QwcbPYdCvNlta+MbHIYxMcu4o93FNuG8nbi dZogYxydNzrGjjp6DboHGO47E8b2CX5izP4jW/oo4ghLnISrTDnE3qXCifXwugT7jsR7 utMQBg3YQxItJnyuAEreIb912wXuRxaicYvQH7qt/gPIB/mpNm8zniy7SYxdaceY2w70 74tQ== X-Gm-Message-State: AHQUAuZGVPhx4v2EQNoSq4lY5b1s7ARitd5gVkSo49sQhNZYDSXCdjQU BA2+0tAO7JTfuLSkakqB/7o= X-Google-Smtp-Source: AHgI3IaDwdflVtW11v/6xsFyC3jOYAurJGKejMHEvecGO/fqsTZc6/RKWjSSgAV0oISInFX0STjC5A== X-Received: by 2002:a63:2705:: with SMTP id n5mr583961pgn.429.1550066538516; Wed, 13 Feb 2019 06:02:18 -0800 (PST) Received: from jordon-HP-15-Notebook-PC ([49.207.48.54]) by smtp.gmail.com with ESMTPSA id 145sm26360429pfa.160.2019.02.13.06.02.16 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 13 Feb 2019 06:02:17 -0800 (PST) Date: Wed, 13 Feb 2019 19:36:36 +0530 From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, pawel@osciak.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, mchehab@kernel.org, linux@armlinux.org.uk, robin.murphy@arm.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v3 7/9] videobuf2/videobuf2-dma-sg.c: Convert to use vm_map_pages() Message-ID: <20190213140636.GA22063@jordon-HP-15-Notebook-PC> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Convert to use vm_map_pages() to map range of kernel memory to user vma. vm_pgoff is treated in V4L2 API as a 'cookie' to select a buffer, not as a in-buffer offset by design and it always want to mmap a whole buffer from its beginning. Signed-off-by: Souptick Joarder Suggested-by: Marek Szyprowski Reviewed-by: Marek Szyprowski --- drivers/media/common/videobuf2/videobuf2-core.c | 7 +++++++ .../media/common/videobuf2/videobuf2-dma-contig.c | 6 ------ drivers/media/common/videobuf2/videobuf2-dma-sg.c | 22 ++++++---------------- 3 files changed, 13 insertions(+), 22 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 70e8c33..ca4577a 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -2175,6 +2175,13 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) goto unlock; } + /* + * vm_pgoff is treated in V4L2 API as a 'cookie' to select a buffer, + * not as a in-buffer offset. We always want to mmap a whole buffer + * from its beginning. + */ + vma->vm_pgoff = 0; + ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma); unlock: diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index aff0ab7..46245c5 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -186,12 +186,6 @@ static int vb2_dc_mmap(void *buf_priv, struct vm_area_struct *vma) return -EINVAL; } - /* - * dma_mmap_* uses vm_pgoff as in-buffer offset, but we want to - * map whole buffer - */ - vma->vm_pgoff = 0; - ret = dma_mmap_attrs(buf->dev, vma, buf->cookie, buf->dma_addr, buf->size, buf->attrs); diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index 015e737..d6b8eca 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -328,28 +328,18 @@ static unsigned int vb2_dma_sg_num_users(void *buf_priv) static int vb2_dma_sg_mmap(void *buf_priv, struct vm_area_struct *vma) { struct vb2_dma_sg_buf *buf = buf_priv; - unsigned long uaddr = vma->vm_start; - unsigned long usize = vma->vm_end - vma->vm_start; - int i = 0; + int err; if (!buf) { printk(KERN_ERR "No memory to map\n"); return -EINVAL; } - do { - int ret; - - ret = vm_insert_page(vma, uaddr, buf->pages[i++]); - if (ret) { - printk(KERN_ERR "Remapping memory, error: %d\n", ret); - return ret; - } - - uaddr += PAGE_SIZE; - usize -= PAGE_SIZE; - } while (usize > 0); - + err = vm_map_pages(vma, buf->pages, buf->num_pages); + if (err) { + printk(KERN_ERR "Remapping memory, error: %d\n", err); + return err; + } /* * Use common vm_area operations to track buffer refcount. -- 1.9.1