From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout4.w1.samsung.com ([210.118.77.14]:14329 "EHLO mailout4.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756071Ab2FNNiP (ORCPT ); Thu, 14 Jun 2012 09:38:15 -0400 Received: from euspt2 (mailout4.w1.samsung.com [210.118.77.14]) by mailout4.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0M5M005NS0KS2N60@mailout4.w1.samsung.com> for linux-media@vger.kernel.org; Thu, 14 Jun 2012 14:38:52 +0100 (BST) Received: from linux.samsung.com ([106.116.38.10]) by spt2.w1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0M5M00FVD0JK8T@spt2.w1.samsung.com> for linux-media@vger.kernel.org; Thu, 14 Jun 2012 14:38:08 +0100 (BST) Date: Thu, 14 Jun 2012 15:37:46 +0200 From: Tomasz Stanislawski Subject: [PATCHv7 12/15] v4l: vb2-vmalloc: add support for dmabuf importing In-reply-to: <1339681069-8483-1-git-send-email-t.stanislaws@samsung.com> To: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: airlied@redhat.com, m.szyprowski@samsung.com, t.stanislaws@samsung.com, kyungmin.park@samsung.com, laurent.pinchart@ideasonboard.com, sumit.semwal@ti.com, daeinki@gmail.com, daniel.vetter@ffwll.ch, robdclark@gmail.com, pawel@osciak.com, linaro-mm-sig@lists.linaro.org, hverkuil@xs4all.nl, remi@remlab.net, subashrp@gmail.com, mchehab@redhat.com, g.liakhovetski@gmx.de Message-id: <1339681069-8483-13-git-send-email-t.stanislaws@samsung.com> Content-transfer-encoding: 7BIT References: <1339681069-8483-1-git-send-email-t.stanislaws@samsung.com> Sender: linux-media-owner@vger.kernel.org List-ID: This patch adds support for importing DMABUF files for vmalloc allocator in Videobuf2. Signed-off-by: Tomasz Stanislawski Signed-off-by: Kyungmin Park --- drivers/media/video/videobuf2-vmalloc.c | 56 +++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/drivers/media/video/videobuf2-vmalloc.c b/drivers/media/video/videobuf2-vmalloc.c index 6b5ca6c..305032f 100644 --- a/drivers/media/video/videobuf2-vmalloc.c +++ b/drivers/media/video/videobuf2-vmalloc.c @@ -29,6 +29,7 @@ struct vb2_vmalloc_buf { unsigned int n_pages; atomic_t refcount; struct vb2_vmarea_handler handler; + struct dma_buf *dbuf; }; static void vb2_vmalloc_put(void *buf_priv); @@ -206,11 +207,66 @@ static int vb2_vmalloc_mmap(void *buf_priv, struct vm_area_struct *vma) return 0; } +/*********************************************/ +/* callbacks for DMABUF buffers */ +/*********************************************/ + +static int vb2_vmalloc_map_dmabuf(void *mem_priv) +{ + struct vb2_vmalloc_buf *buf = mem_priv; + + buf->vaddr = dma_buf_vmap(buf->dbuf); + + return buf->vaddr ? 0 : -EFAULT; +} + +static void vb2_vmalloc_unmap_dmabuf(void *mem_priv) +{ + struct vb2_vmalloc_buf *buf = mem_priv; + + dma_buf_vunmap(buf->dbuf, buf->vaddr); + buf->vaddr = NULL; +} + +static void vb2_vmalloc_detach_dmabuf(void *mem_priv) +{ + struct vb2_vmalloc_buf *buf = mem_priv; + + if (buf->vaddr) + dma_buf_vunmap(buf->dbuf, buf->vaddr); + + kfree(buf); +} + +static void *vb2_vmalloc_attach_dmabuf(void *alloc_ctx, struct dma_buf *dbuf, + unsigned long size, int write) +{ + struct vb2_vmalloc_buf *buf; + + if (dbuf->size < size) + return ERR_PTR(-EFAULT); + + buf = kzalloc(sizeof *buf, GFP_KERNEL); + if (!buf) + return ERR_PTR(-ENOMEM); + + buf->dbuf = dbuf; + buf->write = write; + buf->size = size; + + return buf; +} + + const struct vb2_mem_ops vb2_vmalloc_memops = { .alloc = vb2_vmalloc_alloc, .put = vb2_vmalloc_put, .get_userptr = vb2_vmalloc_get_userptr, .put_userptr = vb2_vmalloc_put_userptr, + .map_dmabuf = vb2_vmalloc_map_dmabuf, + .unmap_dmabuf = vb2_vmalloc_unmap_dmabuf, + .attach_dmabuf = vb2_vmalloc_attach_dmabuf, + .detach_dmabuf = vb2_vmalloc_detach_dmabuf, .vaddr = vb2_vmalloc_vaddr, .mmap = vb2_vmalloc_mmap, .num_users = vb2_vmalloc_num_users, -- 1.7.9.5