From patchwork Fri Feb 15 02:47:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souptick Joarder X-Patchwork-Id: 10814131 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 E46051390 for ; Fri, 15 Feb 2019 02:43:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D18892F424 for ; Fri, 15 Feb 2019 02:43:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C480C2F45F; Fri, 15 Feb 2019 02:43:37 +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 6A4E82F424 for ; Fri, 15 Feb 2019 02:43:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730872AbfBOCn0 (ORCPT ); Thu, 14 Feb 2019 21:43:26 -0500 Received: from mail-pg1-f196.google.com ([209.85.215.196]:40979 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727207AbfBOCn0 (ORCPT ); Thu, 14 Feb 2019 21:43:26 -0500 Received: by mail-pg1-f196.google.com with SMTP id m1so4058353pgq.8; Thu, 14 Feb 2019 18:43:25 -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=inn83Ew357K/ih8pfbluD0tHChrNBeWgVepxNoqLsPfTGsSVcd+Y2TvNyaOt6tsH+E l50EUJtl8WJgmunL6lScD8TdLHN40Al7FiBSXz8sPTFqYjA1D9Y538OponFb/96GzpPK c7Gs+mH17TuI2e4p6V0hcG4Do42SWlWbQApZfFxh68EAjYcMIWUuUYrw86EOJbzKhDiD F9cHRzu5G/0kaQnWGWV+JeffZh9moTJCTuaKNTxwhDR9Q9myrlC+HXeayONpB5vLZOo9 qKY92nsunQvlYAczN6fc4SxQaNmIXCkZXCJd5cqy9NompO6I5cSTc/B1zSJVmYRUGkNJ MolA== 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=AX45/ShrLoPzr6ywwVA6Q22JrFDIHu38xk325zoRiQMQrZbeCxAjVmb+SLYFcwvofi qMUcgmuvxVFJdSyTJmWOCcSXgCNXosJp8XNE1InUTO83JQAHg36+MJvGE/H1e2mw1sT+ ob+fKrOmKFQLk3y2adnXHGdv9S+6jFT2rpMvoJBtv33MPNO28KI8u62YcLEhLcW0VFvZ 7rEJ5/saD1ZkzvK3BNSBYFQSxx0SybVzp3EOGI4NbBwy1xZovKkrLuGpL5clO3LgsXsh +tsXbQODc6artJdqA2jwXJpybteEM0pomlor7W3shoJOVFC8uRiIK4DTwSKwszYZCNT4 c1WA== X-Gm-Message-State: AHQUAuaOJBe6vD0ZER3OOk8Rr7i1SmYO/He3cQXUDsPa9xwarwPez6vZ H75+jbaSGQzgkah/HAlYdW8= X-Google-Smtp-Source: AHgI3IY4Y9LsUJAtQBeI8TTrDehjCuwGc2OKrBuTZ9TvWhq4etnfiX7gHURQ6oqPUVyDoepRwe1zcQ== X-Received: by 2002:a65:6249:: with SMTP id q9mr3013034pgv.229.1550198605218; Thu, 14 Feb 2019 18:43:25 -0800 (PST) Received: from jordon-HP-15-Notebook-PC ([49.207.53.51]) by smtp.gmail.com with ESMTPSA id g10sm4582058pgo.64.2019.02.14.18.43.23 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 14 Feb 2019 18:43:24 -0800 (PST) Date: Fri, 15 Feb 2019 08:17:45 +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 v4 7/9] videobuf2/videobuf2-dma-sg.c: Convert to use vm_map_pages() Message-ID: <20190215024745.GA26461@jordon-HP-15-Notebook-PC> MIME-Version: 1.0 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 X-Virus-Scanned: ClamAV using ClamSMTP 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.