CAN, GPIO, RNG vhost-devices for virtio-loopback [v6]quillback_16.92.0quillback/16.92.016.92.0

This patch adds key components of the viritio-loopback architecture:
- kernel-module-virtio-loopback: the virtio loopback kernel driver
- CAN, GPIO and RNG vhost-user devices from meta-virtualization (commit a215d8320edee0a317a6511e7e2efa5bba867486)

Notes:
- libgpiod, comes from meta-openembedded commit 3029554ceb0b0bb52a8d8ec3f0a75c5113662fe6
- cleaned eg-virt from unused drivers (kernel-module-virtio-video)

Bug-AGL: SPEC-4834

V2 changes:
- related meta-virtualization commit message added in the cover letter
- updated libgpio recipe to v2.1
- SPEC reference added in cover letter

v3
- add vhost-device-can preliminary version. This is placed here with
  the objective to share the link when proposing the new device to
  the rust-vmm/vhost-device community
- remove cargo-update-recipe-crates includes in bb file because it is
  not supported by the rust mixin layer
- vhost-device folder README changes

v4
- fixed libgpiod required version
- tested ref hw and qemu x86/64 builds
- vsock, scsi and i2c rust devices removed from the build as they
  are not yet integrated in virtiod-loopback
- cleaned-up kernel modules kernel-module-virtio-video and
  gstreamer1.0-plugins-bad
- virtio-loopback-driver set to 2-or-later

v5
- Merge with Jan-Simon version v4:
   - remove broken kernel-module-virtio-video
   - use FEATURE_PACKAGES instead of IMAGE_INSTALL:append
   - rename virtio-loopback-driver.bb to
     kernel-module-virtio-loopback_git.bb for consistency

v6
- adding version in the title
- removing MODULE_GIT_REPOSITORY in kernel-modules

Change-Id: Id6cc58e777b9edad03b6c50d0dddaac8601edeaf
Signed-off-by: Michele Paolino <m.paolino@virtualopensystems.com>
Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>

1 files changed, 0 insertions, 424 deletions

diff --git a/meta-egvirt/recipes-kernel/kernel-module-virtio-video/files/virtio_video_dec.c b/meta-egvirt/recipes-kernel/kernel-module-virtio-video/files/virtio_video_dec.c
deleted file mode 100644
index 301a9a16..00000000
--- a/meta-egvirt/recipes-kernel/kernel-module-virtio-video/files/virtio_video_dec.c
+++ /dev/null
@@ -1,424 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/* Decoder for virtio video device.
- *
- * Copyright 2020 OpenSynergy GmbH.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/version.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-ioctl.h>
-
-#include "virtio_video.h"
-
-static int virtio_video_dec_start_streaming(struct vb2_queue *vq,
-					    unsigned int count)
-{
-	struct virtio_video_stream *stream = vb2_get_drv_priv(vq);
-
-	if (virtio_video_state(stream) == STREAM_STATE_ERROR)
-		return -EIO;
-
-	if (!V4L2_TYPE_IS_OUTPUT(vq->type) &&
-	    virtio_video_state(stream) >= STREAM_STATE_INIT)
-		virtio_video_state_update(stream, STREAM_STATE_RUNNING);
-
-	return 0;
-}
-
-static void virtio_video_dec_stop_streaming(struct vb2_queue *vq)
-{
-	int queue_type;
-	struct virtio_video_stream *stream = vb2_get_drv_priv(vq);
-
-	if (V4L2_TYPE_IS_OUTPUT(vq->type))
-		queue_type = VIRTIO_VIDEO_QUEUE_TYPE_INPUT;
-	else
-		queue_type = VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT;
-
-	virtio_video_queue_release_buffers(stream, queue_type);
-	vb2_wait_for_all_buffers(vq);
-}
-
-static const struct vb2_ops virtio_video_dec_qops = {
-	.queue_setup	 = virtio_video_queue_setup,
-	.buf_init	 = virtio_video_buf_init,
-	.buf_cleanup	 = virtio_video_buf_cleanup,
-	.buf_queue	 = virtio_video_buf_queue,
-	.start_streaming = virtio_video_dec_start_streaming,
-	.stop_streaming  = virtio_video_dec_stop_streaming,
-	.wait_prepare	 = vb2_ops_wait_prepare,
-	.wait_finish	 = vb2_ops_wait_finish,
-};
-
-static int virtio_video_dec_g_ctrl(struct v4l2_ctrl *ctrl)
-{
-	int ret = 0;
-	struct virtio_video_stream *stream = ctrl2stream(ctrl);
-
-	if (virtio_video_state(stream) == STREAM_STATE_ERROR)
-		return -EIO;
-
-	switch (ctrl->id) {
-	case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
-		if (virtio_video_state(stream) >=
-		    STREAM_STATE_DYNAMIC_RES_CHANGE)
-			ctrl->val = stream->out_info.min_buffers;
-		else
-			ctrl->val = 0;
-		break;
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	return ret;
-}
-
-static const struct v4l2_ctrl_ops virtio_video_dec_ctrl_ops = {
-	.g_volatile_ctrl	= virtio_video_dec_g_ctrl,
-};
-
-int virtio_video_dec_init_ctrls(struct virtio_video_stream *stream)
-{
-	struct v4l2_ctrl *ctrl;
-
-	v4l2_ctrl_handler_init(&stream->ctrl_handler, 2);
-
-	ctrl = v4l2_ctrl_new_std(&stream->ctrl_handler,
-				&virtio_video_dec_ctrl_ops,
-				V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
-				MIN_BUFS_MIN, MIN_BUFS_MAX, MIN_BUFS_STEP,
-				MIN_BUFS_DEF);
-
-	if (ctrl)
-		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
-
-	if (stream->ctrl_handler.error)
-		return stream->ctrl_handler.error;
-
-	(void)v4l2_ctrl_new_std(&stream->ctrl_handler, NULL,
-				V4L2_CID_MIN_BUFFERS_FOR_OUTPUT,
-				MIN_BUFS_MIN, MIN_BUFS_MAX, MIN_BUFS_STEP,
-				stream->in_info.min_buffers);
-
-	if (stream->ctrl_handler.error)
-		return stream->ctrl_handler.error;
-
-	v4l2_ctrl_handler_setup(&stream->ctrl_handler);
-
-	return 0;
-}
-
-int virtio_video_dec_init_queues(void *priv, struct vb2_queue *src_vq,
-				 struct vb2_queue *dst_vq)
-{
-	int ret;
-	struct virtio_video_stream *stream = priv;
-	struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
-	struct device *dev = vvd->v4l2_dev.dev;
-
-	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
-	src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
-	src_vq->drv_priv = stream;
-	src_vq->buf_struct_size = sizeof(struct virtio_video_buffer);
-	src_vq->ops = &virtio_video_dec_qops;
-	src_vq->mem_ops = virtio_video_mem_ops(vvd);
-	src_vq->min_buffers_needed = stream->in_info.min_buffers;
-	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
-	src_vq->lock = &stream->vq_mutex;
-	src_vq->gfp_flags = virtio_video_gfp_flags(vvd);
-	src_vq->dev = dev;
-
-	ret = vb2_queue_init(src_vq);
-	if (ret)
-		return ret;
-
-	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
-	dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
-	dst_vq->drv_priv = stream;
-	dst_vq->buf_struct_size = sizeof(struct virtio_video_buffer);
-	dst_vq->ops = &virtio_video_dec_qops;
-	dst_vq->mem_ops = virtio_video_mem_ops(vvd);
-	dst_vq->min_buffers_needed = stream->out_info.min_buffers;
-	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
-	dst_vq->lock = &stream->vq_mutex;
-	dst_vq->gfp_flags = virtio_video_gfp_flags(vvd);
-	dst_vq->dev = dev;
-
-	return vb2_queue_init(dst_vq);
-}
-
-static int virtio_video_try_decoder_cmd(struct file *file, void *fh,
-					struct v4l2_decoder_cmd *cmd)
-{
-	struct virtio_video_stream *stream = file2stream(file);
-	struct virtio_video_device *vvd = video_drvdata(file);
-
-	if (virtio_video_state(stream) == STREAM_STATE_ERROR)
-		return -EIO;
-
-	if (virtio_video_state(stream) == STREAM_STATE_DRAIN)
-		return -EBUSY;
-
-	switch (cmd->cmd) {
-	case V4L2_DEC_CMD_STOP:
-	case V4L2_DEC_CMD_START:
-		if (cmd->flags != 0) {
-			v4l2_err(&vvd->v4l2_dev, "flags=%u are not supported",
-				 cmd->flags);
-			return -EINVAL;
-		}
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int virtio_video_decoder_cmd(struct file *file, void *fh,
-				    struct v4l2_decoder_cmd *cmd)
-{
-	int ret;
-	struct vb2_queue *src_vq, *dst_vq;
-	struct virtio_video_stream *stream = file2stream(file);
-	struct virtio_video_device *vvd = video_drvdata(file);
-
-	ret = virtio_video_try_decoder_cmd(file, fh, cmd);
-	if (ret < 0)
-		return ret;
-
-	dst_vq = v4l2_m2m_get_vq(stream->fh.m2m_ctx,
-				 V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
-
-	switch (cmd->cmd) {
-	case V4L2_DEC_CMD_START:
-		vb2_clear_last_buffer_dequeued(dst_vq);
-		break;
-	case V4L2_DEC_CMD_STOP:
-		src_vq = v4l2_m2m_get_vq(stream->fh.m2m_ctx,
-					 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
-
-		if (!vb2_is_streaming(src_vq)) {
-			v4l2_dbg(1, vvd->debug,
-				 &vvd->v4l2_dev, "output is not streaming\n");
-			return 0;
-		}
-
-		if (!vb2_is_streaming(dst_vq)) {
-			v4l2_dbg(1, vvd->debug,
-				 &vvd->v4l2_dev, "capture is not streaming\n");
-			return 0;
-		}
-
-		ret = virtio_video_cmd_stream_drain(vvd, stream->stream_id);
-		if (ret) {
-			v4l2_err(&vvd->v4l2_dev, "failed to drain stream\n");
-			return ret;
-		}
-
-		virtio_video_state_update(stream, STREAM_STATE_DRAIN);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int virtio_video_dec_enum_fmt_vid_cap(struct file *file, void *fh,
-					     struct v4l2_fmtdesc *f)
-{
-	struct virtio_video_stream *stream = file2stream(file);
-	struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
-	struct video_format_info *info;
-	struct video_format *fmt;
-	unsigned long input_mask = 0;
-	int idx = 0, bit_num = 0;
-
-	if (virtio_video_state(stream) == STREAM_STATE_ERROR)
-		return -EIO;
-
-	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
-		return -EINVAL;
-
-	if (f->index >= vvd->num_output_fmts)
-		return -EINVAL;
-
-	info = &stream->in_info;
-	list_for_each_entry(fmt, &vvd->input_fmt_list, formats_list_entry) {
-		if (info->fourcc_format == fmt->desc.format) {
-			input_mask = fmt->desc.mask;
-			break;
-		}
-	}
-
-	if (input_mask == 0)
-		return -EINVAL;
-
-	list_for_each_entry(fmt, &vvd->output_fmt_list, formats_list_entry) {
-		if (test_bit(bit_num, &input_mask)) {
-			if (f->index == idx) {
-				f->pixelformat = fmt->desc.format;
-				return 0;
-			}
-			idx++;
-		}
-		bit_num++;
-	}
-	return -EINVAL;
-}
-
-
-int virtio_video_dec_enum_fmt_vid_out(struct file *file, void *fh,
-				      struct v4l2_fmtdesc *f)
-{
-	struct virtio_video_stream *stream = file2stream(file);
-	struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
-	struct video_format *fmt;
-	int idx = 0;
-
-	if (virtio_video_state(stream) == STREAM_STATE_ERROR)
-		return -EIO;
-
-	if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
-		return -EINVAL;
-
-	if (f->index >= vvd->num_input_fmts)
-		return -EINVAL;
-
-	list_for_each_entry(fmt, &vvd->input_fmt_list, formats_list_entry) {
-		if (f->index == idx) {
-			f->pixelformat = fmt->desc.format;
-			return 0;
-		}
-		idx++;
-	}
-	return -EINVAL;
-}
-
-static int virtio_video_dec_s_fmt(struct file *file, void *fh,
-				  struct v4l2_format *f)
-{
-	int ret;
-	struct virtio_video_stream *stream = file2stream(file);
-
-	ret = virtio_video_s_fmt(file, fh, f);
-	if (ret)
-		return ret;
-
-	if (V4L2_TYPE_IS_OUTPUT(f->type)) {
-		if (virtio_video_state(stream) == STREAM_STATE_IDLE)
-			virtio_video_state_update(stream, STREAM_STATE_INIT);
-	}
-
-	return 0;
-}
-
-static int virtio_video_dec_s_selection(struct file *file, void *fh,
-					struct v4l2_selection *sel)
-{
-	struct virtio_video_stream *stream = file2stream(file);
-	struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
-	int ret;
-
-	if (V4L2_TYPE_IS_OUTPUT(sel->type))
-		return -EINVAL;
-
-	switch (sel->target) {
-	case V4L2_SEL_TGT_COMPOSE:
-		stream->out_info.crop.top = sel->r.top;
-		stream->out_info.crop.left = sel->r.left;
-		stream->out_info.crop.width = sel->r.width;
-		stream->out_info.crop.height = sel->r.height;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	ret = virtio_video_cmd_set_params(vvd, stream,  &stream->out_info,
-					   VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT);
-	if (ret)
-		return -EINVAL;
-
-	return virtio_video_cmd_get_params(vvd, stream,
-					   VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT);
-}
-
-static const struct v4l2_ioctl_ops virtio_video_dec_ioctl_ops = {
-	.vidioc_querycap	= virtio_video_querycap,
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0))
-	.vidioc_enum_fmt_vid_cap        = virtio_video_dec_enum_fmt_vid_cap,
-	.vidioc_enum_fmt_vid_out        = virtio_video_dec_enum_fmt_vid_out,
-#else
-	.vidioc_enum_fmt_vid_cap_mplane = virtio_video_dec_enum_fmt_vid_cap,
-	.vidioc_enum_fmt_vid_out_mplane = virtio_video_dec_enum_fmt_vid_out,
-#endif
-	.vidioc_g_fmt_vid_cap_mplane	= virtio_video_g_fmt,
-	.vidioc_s_fmt_vid_cap_mplane	= virtio_video_dec_s_fmt,
-
-	.vidioc_g_fmt_vid_out_mplane	= virtio_video_g_fmt,
-	.vidioc_s_fmt_vid_out_mplane	= virtio_video_dec_s_fmt,
-
-	.vidioc_g_selection = virtio_video_g_selection,
-	.vidioc_s_selection = virtio_video_dec_s_selection,
-
-	.vidioc_try_decoder_cmd	= virtio_video_try_decoder_cmd,
-	.vidioc_decoder_cmd	= virtio_video_decoder_cmd,
-	.vidioc_enum_frameintervals = virtio_video_enum_framemintervals,
-	.vidioc_enum_framesizes = virtio_video_enum_framesizes,
-
-	.vidioc_reqbufs		= virtio_video_reqbufs,
-	.vidioc_querybuf	= v4l2_m2m_ioctl_querybuf,
-	.vidioc_qbuf		= virtio_video_qbuf,
-	.vidioc_dqbuf		= virtio_video_dqbuf,
-	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
-	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
-	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
-
-	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
-	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
-
-	.vidioc_subscribe_event = virtio_video_subscribe_event,
-	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
-};
-
-void *virtio_video_dec_get_fmt_list(struct virtio_video_device *vvd)
-{
-	return &vvd->input_fmt_list;
-}
-
-static struct virtio_video_device_ops virtio_video_dec_ops = {
-	.init_ctrls = virtio_video_dec_init_ctrls,
-	.init_queues = virtio_video_dec_init_queues,
-	.get_fmt_list = virtio_video_dec_get_fmt_list,
-};
-
-int virtio_video_dec_init(struct virtio_video_device *vvd)
-{
-	ssize_t num;
-	struct video_device *vd = &vvd->video_dev;
-
-	vd->ioctl_ops = &virtio_video_dec_ioctl_ops;
-	vvd->ops = &virtio_video_dec_ops;
-
-	num = strscpy(vd->name, "stateful-decoder", sizeof(vd->name));
-	if (num < 0)
-		return num;
-
-	return 0;
-}