From patchwork Wed Oct 26 18:42:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 619151 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5424FA3740 for ; Wed, 26 Oct 2022 18:42:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234317AbiJZSmX (ORCPT ); Wed, 26 Oct 2022 14:42:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234193AbiJZSmV (ORCPT ); Wed, 26 Oct 2022 14:42:21 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1442F6165 for ; Wed, 26 Oct 2022 11:42:20 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1onlM3-0005To-6t; Wed, 26 Oct 2022 20:42:19 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1onlM3-000Ya6-7S; Wed, 26 Oct 2022 20:42:18 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1onlM1-001XX8-ME; Wed, 26 Oct 2022 20:42:17 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, gregkh@linuxfoundation.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, kernel@pengutronix.de, stable Subject: [PATCH 1/2] media: videobuf2-dma-sg: fix vmap and vunmap callbacks Date: Wed, 26 Oct 2022 20:42:11 +0200 Message-Id: <20221026184212.366897-1-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org For dmabuf import users to be able to use the vaddr from another videobuf2-dma-sg source, the exporter needs to set a proper vaddr on vb2_dma_sg_dmabuf_ops_vmap callback. This patch adds vm_map_ram on map if buf->vaddr was not set, and also adds the vb2_dma_sg_dmabuf_ops_vunmap function to remove the mapping afterwards. Cc: stable Signed-off-by: Michael Grzeschik --- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index fa69158a65b1fd..8d6e154bbbc8b0 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -496,11 +496,25 @@ static int vb2_dma_sg_dmabuf_ops_vmap(struct dma_buf *dbuf, { struct vb2_dma_sg_buf *buf = dbuf->priv; + if (!buf->vaddr) + buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1); + iosys_map_set_vaddr(map, buf->vaddr); return 0; } +static void vb2_dma_sg_dmabuf_ops_vunmap(struct dma_buf *dbuf, + struct iosys_map *map) +{ + struct vb2_dma_sg_buf *buf = dbuf->priv; + + if (buf->vaddr) + vm_unmap_ram(buf->vaddr, buf->num_pages); + + buf->vaddr = NULL; +} + static int vb2_dma_sg_dmabuf_ops_mmap(struct dma_buf *dbuf, struct vm_area_struct *vma) { @@ -515,6 +529,7 @@ static const struct dma_buf_ops vb2_dma_sg_dmabuf_ops = { .begin_cpu_access = vb2_dma_sg_dmabuf_ops_begin_cpu_access, .end_cpu_access = vb2_dma_sg_dmabuf_ops_end_cpu_access, .vmap = vb2_dma_sg_dmabuf_ops_vmap, + .vunmap = vb2_dma_sg_dmabuf_ops_vunmap, .mmap = vb2_dma_sg_dmabuf_ops_mmap, .release = vb2_dma_sg_dmabuf_ops_release, };