On Thu, 2018-11-15 at 11:21 +0100, Hans Verkuil wrote:
> On 11/14/18 15:38, Philipp Zabel wrote:
> > Test that V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS is reported equally for
> > both MMAP and DMABUF memory types. If supported, try to orphan buffers
> > by calling reqbufs(0) before unmapping or closing DMABUF fds.
> >
> > Also close exported DMABUF fds and free buffers in testDmaBuf if
> > orphaned buffers are not supported.
> >
> > Signed-off-by: Philipp Zabel <[email protected]>
> > ---
> > contrib/freebsd/include/linux/videodev2.h | 1 +
> > include/linux/videodev2.h | 1 +
> > utils/common/v4l2-info.cpp | 1 +
> > utils/v4l2-compliance/v4l2-compliance.h | 1 +
> > utils/v4l2-compliance/v4l2-test-buffers.cpp | 35 +++++++++++++++++----
> > 5 files changed, 33 insertions(+), 6 deletions(-)
> >
> > diff --git a/contrib/freebsd/include/linux/videodev2.h
> > b/contrib/freebsd/include/linux/videodev2.h
> > index 9928c00e4b68..33153b53c175 100644
> > --- a/contrib/freebsd/include/linux/videodev2.h
> > +++ b/contrib/freebsd/include/linux/videodev2.h
> > @@ -907,6 +907,7 @@ struct v4l2_requestbuffers {
> > #define V4L2_BUF_CAP_SUPPORTS_USERPTR (1 << 1)
> > #define V4L2_BUF_CAP_SUPPORTS_DMABUF (1 << 2)
> > #define V4L2_BUF_CAP_SUPPORTS_REQUESTS (1 << 3)
> > +#define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS (1 << 4)
> >
> > /**
> > * struct v4l2_plane - plane info for multi-planar buffers
> > diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
> > index 79418cd39480..a39300cacb6a 100644
> > --- a/include/linux/videodev2.h
> > +++ b/include/linux/videodev2.h
> > @@ -873,6 +873,7 @@ struct v4l2_requestbuffers {
> > #define V4L2_BUF_CAP_SUPPORTS_USERPTR (1 << 1)
> > #define V4L2_BUF_CAP_SUPPORTS_DMABUF (1 << 2)
> > #define V4L2_BUF_CAP_SUPPORTS_REQUESTS (1 << 3)
> > +#define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS (1 << 4)
> >
> > /**
> > * struct v4l2_plane - plane info for multi-planar buffers
> > diff --git a/utils/common/v4l2-info.cpp b/utils/common/v4l2-info.cpp
> > index 258e5446f030..3699c35cb9d6 100644
> > --- a/utils/common/v4l2-info.cpp
> > +++ b/utils/common/v4l2-info.cpp
> > @@ -200,6 +200,7 @@ static const flag_def bufcap_def[] = {
> > { V4L2_BUF_CAP_SUPPORTS_USERPTR, "userptr" },
> > { V4L2_BUF_CAP_SUPPORTS_DMABUF, "dmabuf" },
> > { V4L2_BUF_CAP_SUPPORTS_REQUESTS, "requests" },
> > + { V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS, "orphaned-bufs" },
> > { 0, NULL }
> > };
> >
> > diff --git a/utils/v4l2-compliance/v4l2-compliance.h
> > b/utils/v4l2-compliance/v4l2-compliance.h
> > index def185f17261..88ec260a9bcc 100644
> > --- a/utils/v4l2-compliance/v4l2-compliance.h
> > +++ b/utils/v4l2-compliance/v4l2-compliance.h
> > @@ -119,6 +119,7 @@ struct base_node {
> > __u32 valid_buftypes;
> > __u32 valid_buftype;
> > __u32 valid_memorytype;
> > + bool has_orphaned_bufs;
>
> I'd rename that to supports_orphaned_bufs.
Ok.
> > };
> >
> > struct node : public base_node, public cv4l_fd {
> > diff --git a/utils/v4l2-compliance/v4l2-test-buffers.cpp
> > b/utils/v4l2-compliance/v4l2-test-buffers.cpp
> > index c59a56d9ced7..6174015cb4e7 100644
> > --- a/utils/v4l2-compliance/v4l2-test-buffers.cpp
> > +++ b/utils/v4l2-compliance/v4l2-test-buffers.cpp
> > @@ -400,8 +400,11 @@ int testReqBufs(struct node *node)
> > mmap_valid = !ret;
> > if (mmap_valid)
> > caps = q.g_capabilities();
> > - if (caps)
> > + if (caps) {
> > fail_on_test(mmap_valid ^ !!(caps &
> > V4L2_BUF_CAP_SUPPORTS_MMAP));
> > + if (caps & V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS)
> > + node->has_orphaned_bufs = true;
> > + }
> >
> > q.init(i, V4L2_MEMORY_USERPTR);
> > ret = q.reqbufs(node, 0);
> > @@ -418,8 +421,11 @@ int testReqBufs(struct node *node)
> > fail_on_test(!mmap_valid && dmabuf_valid);
> > // Note: dmabuf is only supported with vb2, so we can assume a
> > // non-0 caps value if dmabuf is supported.
> > - if (caps || dmabuf_valid)
> > + if (caps || dmabuf_valid) {
> > fail_on_test(dmabuf_valid ^ !!(caps &
> > V4L2_BUF_CAP_SUPPORTS_DMABUF));
> > + if (node->has_orphaned_bufs)
> > + fail_on_test(userptr_valid ^ !!(caps &
> > V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS));
>
> Huh? I'm not sure what you are testing here.
I intended to test that if MMAP supports orphaned buffers, DMABUF should
as well, but stopped halfway. Otherwise we'd have to keep separate flags
for MMAP and DMABUF.
> > + }
> >
> > fail_on_test((can_stream && !is_overlay) && !mmap_valid &&
> > !userptr_valid && !dmabuf_valid);
> > fail_on_test((!can_stream || is_overlay) && (mmap_valid ||
> > userptr_valid || dmabuf_valid));
> > @@ -967,12 +973,22 @@ int testMmap(struct node *node, unsigned frame_count)
>
> The setupM2M function should check if m2m_q also sets the
> V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS.
> I.e. this capability for m2m_q must match node->has_orphaned_bufs.
>
> It makes no sense if it is set for the capture queue but not the output queue
> for m2m devices. And since this has to be set manually in the drivers (at
> least
> for now), this needs to be checked by v4l2-compliance.
I'll add a check for this.
> > fail_on_test(captureBufs(node, q, m2m_q, frame_count, true));
> > fail_on_test(node->streamoff(q.g_type()));
> > fail_on_test(node->streamoff(q.g_type()));
> > - q.munmap_bufs(node);
> > - fail_on_test(q.reqbufs(node, 0));
> > + if (node->has_orphaned_bufs) {
> > + fail_on_test(q.reqbufs(node, 0));
> > + q.munmap_bufs(node);
> > + } else {
> > + q.munmap_bufs(node);
> > + fail_on_test(q.reqbufs(node, 0));
>
> This 'else' can be improved:
>
> } else if (!q.reqbufs(node, 0)) {
> // It's either a bug or this driver should set
> // V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS
> warn("Can free buffers even if still mmap()ed\n");
> q.munmap_bufs(node);
> } else {
> q.munmap_bufs(node);
> fail_on_test(q.reqbufs(node, 0));
Ok.
> > + }
> > if (node->is_m2m) {
> > fail_on_test(node->streamoff(m2m_q.g_type()));
> > - m2m_q.munmap_bufs(node);
> > - fail_on_test(m2m_q.reqbufs(node, 0));
> > + if (node->has_orphaned_bufs) {
> > + fail_on_test(m2m_q.reqbufs(node, 0));
> > + m2m_q.munmap_bufs(node);
> > + } else {
> > + m2m_q.munmap_bufs(node);
> > + fail_on_test(m2m_q.reqbufs(node, 0));
> > + }
> > }
> > }
> > return 0;
> > @@ -1201,6 +1217,13 @@ int testDmaBuf(struct node *expbuf_node, struct node
> > *node, unsigned frame_count
> > fail_on_test(captureBufs(node, q, m2m_q, frame_count, true));
> > fail_on_test(node->streamoff(q.g_type()));
> > fail_on_test(node->streamoff(q.g_type()));
> > + if (node->has_orphaned_bufs) {
> > + fail_on_test(q.reqbufs(node, 0));
> > + exp_q.close_exported_fds();
> > + } else {
>
> Something similar to the MMAP case should be done here as well.
>
> If nothing else, that checks that if V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS
> is *not* set, then q.reqbufs(node, 0) should fail.
Will do. Thank you for the comments!
regards
Philipp
