[igt-dev] [PATCH i-g-t] tests/kms_lease: exercise uevent
Daniel Vetter
daniel at ffwll.ch
Wed Feb 20 23:48:09 UTC 2019
On Wed, Feb 20, 2019 at 06:42:43PM -0500, Lyude Paul wrote:
> On Wed, 2019-02-20 at 22:17 +0100, Daniel Vetter wrote:
> > And make sure we get the LEASE=1 value, indicating a lessee change.
> >
> > v2: Apparently netlink reading can leak EAGAIN out through
> > udev_monitor_receive_device. No idea what's going on there, so let's
> > wrap some duct tape around it.
> >
> > v3: Lyude reported that we might get a few udev events on startup of
> > the test. Drain those first.
> >
> > v4: Use the igt hotplug library functions, they already take care of
> > all the uevent special cases.
> >
> > Cc: Lyude Paul <lyude at redhat.com>
> > Cc: Keith Packard <keithp at keithp.com>
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > ---
> > lib/igt_kms.c | 42 +++++++++++++++++++++++++++++++-----------
> > lib/igt_kms.h | 2 ++
> > tests/kms_lease.c | 36 ++++++++++++++++++++++++++++++++++++
> > 3 files changed, 69 insertions(+), 11 deletions(-)
> >
> > diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> > index 85a911e11060..8f0b79d7727b 100644
> > --- a/lib/igt_kms.c
> > +++ b/lib/igt_kms.c
> > @@ -4019,16 +4019,8 @@ struct udev_monitor *igt_watch_hotplug(void)
> > return mon;
> > }
> >
> > -/**
> > - * igt_hotplug_detected:
> > - * @mon: A udev monitor initialized with #igt_watch_hotplug
> > - * @timeout_secs: How long to wait for a hotplug event to occur.
> > - *
> > - * Assert that a hotplug event was received since we last checked the
> > monitor.
> > - *
> > - * Returns: true if a sysfs hotplug event was received, false if we timed
> > out
> > - */
> > -bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
> > +static bool event_detected(struct udev_monitor *mon, int timeout_secs,
> > + const char *property)
> > {
> > struct udev_device *dev;
> > const char *hotplug_val;
> > @@ -4046,7 +4038,7 @@ bool igt_hotplug_detected(struct udev_monitor *mon,
> > int timeout_secs)
> > while (!hotplug_received && poll(&fd, 1, timeout_secs * 1000)) {
> > dev = udev_monitor_receive_device(mon);
> >
> > - hotplug_val = udev_device_get_property_value(dev, "HOTPLUG");
> > + hotplug_val = udev_device_get_property_value(dev, property);
> > if (hotplug_val && atoi(hotplug_val) == 1)
> > hotplug_received = true;
> >
> > @@ -4056,6 +4048,34 @@ bool igt_hotplug_detected(struct udev_monitor *mon,
> > int timeout_secs)
> > return hotplug_received;
> > }
> >
> > +/**
> > + * igt_hotplug_detected:
> > + * @mon: A udev monitor initialized with #igt_watch_hotplug
> > + * @timeout_secs: How long to wait for a hotplug event to occur.
> > + *
> > + * Assert that a hotplug event was received since we last checked the
> > monitor.
> > + *
> > + * Returns: true if a sysfs hotplug event was received, false if we timed
> > out
> > + */
> > +bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
> > +{
> > + return event_detected(mon, timeout_secs, "HOTPLUG");
> > +}
> > +
> > +/**
> > + * igt_lease_change_detected:
> > + * @mon: A udev monitor initialized with #igt_watch_hotplug
> > + * @timeout_secs: How long to wait for a lease change event to occur.
> > + *
> > + * Assert that a lease change event was received since we last checked the
> > monitor.
> > + *
> > + * Returns: true if a sysfs lease change event was received, false if we
> > timed out
> > + */
> > +bool igt_lease_change_detected(struct udev_monitor *mon, int timeout_secs)
> > +{
> > + return event_detected(mon, timeout_secs, "LEASE");
> > +}
> > +
> > /**
> > * igt_flush_hotplugs:
> > * @mon: A udev monitor initialized with #igt_watch_hotplug
> > diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> > index 679d4e84fab8..5755b160d13e 100644
> > --- a/lib/igt_kms.h
> > +++ b/lib/igt_kms.h
> > @@ -749,6 +749,8 @@ const unsigned char* igt_kms_get_alt_edid(void);
> > struct udev_monitor *igt_watch_hotplug(void);
> > bool igt_hotplug_detected(struct udev_monitor *mon,
> > int timeout_secs);
> > +bool igt_lease_change_detected(struct udev_monitor *mon,
> > + int timeout_secs);
> > void igt_flush_hotplugs(struct udev_monitor *mon);
> > void igt_cleanup_hotplug(struct udev_monitor *mon);
> >
> > diff --git a/tests/kms_lease.c b/tests/kms_lease.c
> > index d082a7988eaa..600f6779561d 100644
> > --- a/tests/kms_lease.c
> > +++ b/tests/kms_lease.c
> > @@ -40,6 +40,8 @@
> > #include <sys/time.h>
> > #include <sys/wait.h>
> >
> > +#include <libudev.h>
> > +
> > #include <drm.h>
> >
> > IGT_TEST_DESCRIPTION("Test of CreateLease.");
> > @@ -976,6 +978,37 @@ static void implicit_plane_lease(data_t *data)
> > drmSetClientCap(data->master.fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
> > }
> >
> > +static void lease_uevent(data_t *data)
> > +{
> > + int lease_fd;
> > + struct local_drm_mode_list_lessees mll;
> > + struct udev_monitor *uevent_monitor;
> > +
> > + uevent_monitor = igt_watch_hotplug();
> > +
> > + igt_flush_hotplugs(uevent_monitor);
> Shouldn't we rename
> igt_watch_hotplug()/igt_flush_hotplugs()/igt_cleanup_hotplug()/etc. as well to
> reflect that these are used for more then udev hotplug events now?
I was feeling unmotivated :-)
Slightly more seriously, the excuse is that I expect all testcases except
this one will want hotplug uevents, nothing else. So the naming makes
some sense to keep, leaving kms_lease here as the special case.
Originally drm leases even use HOTPLUG=1 as their uevent too, but we fixed
that before it became uapi. -modesetting still doesn't differentiate.
-Daniel
>
> Otherwise, looks good to me
>
> > +
> > + lease_fd = create_simple_lease(data->master.fd, data);
> > +
> > + igt_assert(!igt_lease_change_detected(uevent_monitor, 1));
> > +
> > + mll.pad = 0;
> > + mll.count_lessees = 0;
> > + mll.lessees_ptr = 0;
> > + igt_assert_eq(list_lessees(data->master.fd, &mll), 0);
> > + igt_assert_eq(mll.count_lessees, 1);
> > +
> > + close(lease_fd);
> > +
> > + igt_assert(igt_lease_change_detected(uevent_monitor, 1));
> > +
> > + mll.lessees_ptr = 0;
> > + igt_assert_eq(list_lessees(data->master.fd, &mll), 0);
> > + igt_assert_eq(mll.count_lessees, 0);
> > +
> > + igt_cleanup_hotplug(uevent_monitor);
> > +}
> > +
> > igt_main
> > {
> > data_t data;
> > @@ -1023,4 +1056,7 @@ igt_main
> >
> > igt_subtest("implicit-plane-lease")
> > implicit_plane_lease(&data);
> > +
> > + igt_subtest("lease-uevent")
> > + lease_uevent(&data);
> > }
> --
> Cheers,
> Lyude Paul
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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