Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753296AbdCMTVD (ORCPT ); Mon, 13 Mar 2017 15:21:03 -0400 Received: from mail-qt0-f196.google.com ([209.85.216.196]:34397 "EHLO mail-qt0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752577AbdCMTUw (ORCPT ); Mon, 13 Mar 2017 15:20:52 -0400 From: Gustavo Padovan To: linux-media@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Laurent Pinchart , Javier Martinez Canillas , linux-kernel@vger.kernel.org, Gustavo Padovan Subject: [RFC 03/10] [media] vb2: add in-fence support to QBUF Date: Mon, 13 Mar 2017 16:20:28 -0300 Message-Id: <20170313192035.29859-4-gustavo@padovan.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170313192035.29859-1-gustavo@padovan.org> References: <20170313192035.29859-1-gustavo@padovan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5174 Lines: 161 From: Gustavo Padovan Receive in-fence from userspace and support for waiting on them before queueing the buffer for the driver. Signed-off-by: Gustavo Padovan --- drivers/media/Kconfig | 1 + drivers/media/v4l2-core/videobuf2-core.c | 24 ++++++++++++++++++++---- drivers/media/v4l2-core/videobuf2-v4l2.c | 14 +++++++++++++- include/media/videobuf2-core.h | 7 ++++++- 4 files changed, 40 insertions(+), 6 deletions(-) diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig index 3512316..7c5a0e0 100644 --- a/drivers/media/Kconfig +++ b/drivers/media/Kconfig @@ -5,6 +5,7 @@ menuconfig MEDIA_SUPPORT tristate "Multimedia support" depends on HAS_IOMEM + select SYNC_FILE help If you want to use Webcams, Video grabber devices and/or TV devices enable this option and other options below. diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 0e30fcd..e0e7109 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -1400,7 +1400,18 @@ static int __vb2_core_qbuf(struct vb2_buffer *vb, struct vb2_queue *q) return 0; } -int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb) +static void vb2_qbuf_fence_cb(struct dma_fence *f, struct dma_fence_cb *cb) +{ + struct vb2_buffer *vb = container_of(cb, struct vb2_buffer, fence_cb); + + dma_fence_put(vb->in_fence); + vb->in_fence = NULL; + + __vb2_core_qbuf(vb, vb->vb2_queue); +} + +int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb, + struct dma_fence *fence) { struct vb2_buffer *vb; int ret; @@ -1432,6 +1443,11 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb) if (pb) call_void_bufop(q, fill_user_buffer, vb, pb); + vb->in_fence = fence; + if (fence && !dma_fence_add_callback(fence, &vb->fence_cb, + vb2_qbuf_fence_cb)) + return 0; + return __vb2_core_qbuf(vb, q); } EXPORT_SYMBOL_GPL(vb2_core_qbuf); @@ -2246,7 +2262,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) * Queue all buffers. */ for (i = 0; i < q->num_buffers; i++) { - ret = vb2_core_qbuf(q, i, NULL); + ret = vb2_core_qbuf(q, i, NULL, NULL); if (ret) goto err_reqbufs; fileio->bufs[i].queued = 1; @@ -2425,7 +2441,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ if (copy_timestamp) b->timestamp = ktime_get_ns(); - ret = vb2_core_qbuf(q, index, NULL); + ret = vb2_core_qbuf(q, index, NULL, NULL); dprintk(5, "vb2_dbuf result: %d\n", ret); if (ret) return ret; @@ -2528,7 +2544,7 @@ static int vb2_thread(void *data) if (copy_timestamp) vb->timestamp = ktime_get_ns();; if (!threadio->stop) - ret = vb2_core_qbuf(q, vb->index, NULL); + ret = vb2_core_qbuf(q, vb->index, NULL, NULL); call_void_qop(q, wait_prepare, q); if (ret || threadio->stop) break; diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index d23c1bf..c164aa0 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -557,6 +558,7 @@ EXPORT_SYMBOL_GPL(vb2_create_bufs); int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) { + struct dma_fence *fence = NULL; int ret; if (vb2_fileio_is_active(q)) { @@ -565,7 +567,17 @@ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) } ret = vb2_queue_or_prepare_buf(q, b, "qbuf"); - return ret ? ret : vb2_core_qbuf(q, b->index, b); + + if (b->flags & V4L2_BUF_FLAG_IN_FENCE) { + if (b->memory != VB2_MEMORY_DMABUF) + return -EINVAL; + + fence = sync_file_get_fence(b->fence_fd); + if (!fence) + return -EINVAL; + } + + return ret ? ret : vb2_core_qbuf(q, b->index, b, fence); } EXPORT_SYMBOL_GPL(vb2_qbuf); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index ac5898a..fe2de99 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -16,6 +16,7 @@ #include #include #include +#include #define VB2_MAX_FRAME (32) #define VB2_MAX_PLANES (8) @@ -259,6 +260,9 @@ struct vb2_buffer { struct list_head queued_entry; struct list_head done_entry; + + struct dma_fence *in_fence; + struct dma_fence_cb fence_cb; #ifdef CONFIG_VIDEO_ADV_DEBUG /* * Counters for how often these buffer-related ops are @@ -727,7 +731,8 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb); * The return values from this function are intended to be directly returned * from vidioc_qbuf handler in driver. */ -int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb); +int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb, + struct dma_fence *fence); /** * vb2_core_dqbuf() - Dequeue a buffer to the userspace -- 2.9.3