On 2017年05月11日 10:41, Deucher, Alexander wrote:
> -----Original Message-----
> From: Deucher, Alexander
> Sent: Wednesday, May 10, 2017 10:38 PM
> To: Huang, Ray; [email protected]; Koenig, Christian
> Cc: Zhou, David(ChunMing); Wang, Ken; Huan, Alvin; Huang, Ray
> Subject: RE: [PATCH 2/2] drm/amdgpu: export test ring debugfs interface
>
> > -----Original Message-----
> > From: Huang Rui [mailto:[email protected]]
> > Sent: Wednesday, May 10, 2017 10:29 PM
> > To: [email protected]; Deucher, Alexander; Koenig,
Christian
> > Cc: Zhou, David(ChunMing); Wang, Ken; Huan, Alvin; Huang, Ray
> > Subject: [PATCH 2/2] drm/amdgpu: export test ring debugfs interface
> >
> > Signed-off-by: Huang Rui <[email protected]>
>
> Reviewed-by: Alex Deucher <[email protected]>
Not sure if it's important for this since it's debugfs, but we don't
have any sort of ring locks anymore (since everything should go
through the scheduler once it's started) so we could theoretically get
collisions if there are active apps using the GPU and you run these tests.
Yes, agree. So patch#1 for ib test should use scheduler, but which could
be a big change and Christian doesn't like to use scheduler for ib test
case, consider this is only for test case, the problem isn't big:).
btw: I think patch#2 isn't need if patch#1 is landed, since when you use
this sys interface, the amdgpu driver must be loaded successfully, ring
test is meaningless.
Regards,
David Zhou
Alex
>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 44
> > ++++++++++++++++++++++++++++--
> > 1 file changed, 42 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > index 7becf11..3637396 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > @@ -3625,14 +3625,54 @@ static int amdgpu_debugfs_test_ib(struct
> > seq_file *m, void *data)
> > return 0;
> > }
> >
> > +static int amdgpu_ring_tests(struct amdgpu_device *adev)
> > +{
> > + unsigned i;
> > + int r = 0;
> > +
> > + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
> > + struct amdgpu_ring *ring = adev->rings[i];
> > +
> > + if (!ring || !ring->ready)
> > + continue;
> > +
> > + r = amdgpu_ring_test_ring(ring);
> > + if (r) {
> > + ring->ready = false;
> > + DRM_ERROR("amdgpu: failed to test ring %d
> > (%d).\n",
> > + i, r);
> > + }
> > + }
> > +
> > + return r;
> > +}
> > +
> > +static int amdgpu_debugfs_test_ring(struct seq_file *m, void *data)
> > +{
> > + struct drm_info_node *node = (struct drm_info_node *) m-
> > >private;
> > + struct drm_device *dev = node->minor->dev;
> > + struct amdgpu_device *adev = dev->dev_private;
> > + int r = 0;
> > +
> > + seq_printf(m, "run ring test:\n");
> > + r = amdgpu_ring_tests(adev);
> > + if (r)
> > + seq_printf(m, "ring tests failed (%d).\n", r);
> > + else
> > + seq_printf(m, "ring tests passed.\n");
> > +
> > + return 0;
> > +}
> > +
> > static const struct drm_info_list
amdgpu_debugfs_test_ib_ring_list[] = {
> > - {"amdgpu_test_ib", &amdgpu_debugfs_test_ib}
> > + {"amdgpu_test_ib", &amdgpu_debugfs_test_ib},
> > + {"amdgpu_test_ring", &amdgpu_debugfs_test_ring}
> > };
> >
> > static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device
> *adev)
> > {
> > return amdgpu_debugfs_add_files(adev,
> > - amdgpu_debugfs_test_ib_ring_list,
> > 1);
> > + amdgpu_debugfs_test_ib_ring_list,
> > 2);
> > }
> >
> > int amdgpu_debugfs_init(struct drm_minor *minor)
> > --
> > 2.7.4
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