On Tue, Aug 24, 2021 at 10:12:24AM +0200, Christian König wrote:
> Just a gentle ping. Daniel any more comments on this?
Still haven't seen a patch set to nuke the sw_sync igt tests. Otherwise
this is just going to cause fails and reboots in our ci (we reboot on
taints).
> I'm not sure if the second patch will cause trouble with any unit test, but
> I'm willing to try it. We can always trivial revert it.
See above, remove the igts and we should be fine I think. I don't think
there's any selftests or kselftests, but checking that should be a quick
grep at most.
-Daniel
>
> Thanks,
> Christian.
>
> Am 18.08.21 um 12:54 schrieb Christian König:
> > Only the DRM GPU scheduler, radeon and amdgpu where using them and they
> > depend
> > on a non existing config option to actually emit some code.
> >
> > v2: keep the signal path as is for now
> >
> > Signed-off-by: Christian König <christian.koe...@amd.com>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 10 +---------
> > drivers/gpu/drm/radeon/radeon_fence.c | 24 ++++-------------------
> > drivers/gpu/drm/scheduler/sched_fence.c | 18 ++---------------
> > include/linux/dma-fence.h | 22 ---------------------
> > 4 files changed, 7 insertions(+), 67 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> > index 0b1c48590c43..c65994e382bd 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> > @@ -246,7 +246,6 @@ bool amdgpu_fence_process(struct amdgpu_ring *ring)
> > struct amdgpu_fence_driver *drv = &ring->fence_drv;
> > struct amdgpu_device *adev = ring->adev;
> > uint32_t seq, last_seq;
> > - int r;
> > do {
> > last_seq = atomic_read(&ring->fence_drv.last_seq);
> > @@ -278,12 +277,7 @@ bool amdgpu_fence_process(struct amdgpu_ring *ring)
> > if (!fence)
> > continue;
> > - r = dma_fence_signal(fence);
> > - if (!r)
> > - DMA_FENCE_TRACE(fence, "signaled from irq context\n");
> > - else
> > - BUG();
> > -
> > + dma_fence_signal(fence);
> > dma_fence_put(fence);
> > pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
> > pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
> > @@ -639,8 +633,6 @@ static bool amdgpu_fence_enable_signaling(struct
> > dma_fence *f)
> > if (!timer_pending(&ring->fence_drv.fallback_timer))
> > amdgpu_fence_schedule_fallback(ring);
> > - DMA_FENCE_TRACE(&fence->base, "armed on ring %i!\n", ring->idx);
> > -
> > return true;
> > }
> > diff --git a/drivers/gpu/drm/radeon/radeon_fence.c
> > b/drivers/gpu/drm/radeon/radeon_fence.c
> > index 18f2c2e0dfb3..3f351d222cbb 100644
> > --- a/drivers/gpu/drm/radeon/radeon_fence.c
> > +++ b/drivers/gpu/drm/radeon/radeon_fence.c
> > @@ -176,18 +176,11 @@ static int
> > radeon_fence_check_signaled(wait_queue_entry_t *wait, unsigned mode,
> > */
> > seq = atomic64_read(&fence->rdev->fence_drv[fence->ring].last_seq);
> > if (seq >= fence->seq) {
> > - int ret = dma_fence_signal_locked(&fence->base);
> > -
> > - if (!ret)
> > - DMA_FENCE_TRACE(&fence->base, "signaled from irq
> > context\n");
> > - else
> > - DMA_FENCE_TRACE(&fence->base, "was already signaled\n");
> > -
> > + dma_fence_signal_locked(&fence->base);
> > radeon_irq_kms_sw_irq_put(fence->rdev, fence->ring);
> > __remove_wait_queue(&fence->rdev->fence_queue,
> > &fence->fence_wake);
> > dma_fence_put(&fence->base);
> > - } else
> > - DMA_FENCE_TRACE(&fence->base, "pending\n");
> > + }
> > return 0;
> > }
> > @@ -422,8 +415,6 @@ static bool radeon_fence_enable_signaling(struct
> > dma_fence *f)
> > fence->fence_wake.func = radeon_fence_check_signaled;
> > __add_wait_queue(&rdev->fence_queue, &fence->fence_wake);
> > dma_fence_get(f);
> > -
> > - DMA_FENCE_TRACE(&fence->base, "armed on ring %i!\n", fence->ring);
> > return true;
> > }
> > @@ -441,11 +432,7 @@ bool radeon_fence_signaled(struct radeon_fence *fence)
> > return true;
> > if (radeon_fence_seq_signaled(fence->rdev, fence->seq, fence->ring)) {
> > - int ret;
> > -
> > - ret = dma_fence_signal(&fence->base);
> > - if (!ret)
> > - DMA_FENCE_TRACE(&fence->base, "signaled from
> > radeon_fence_signaled\n");
> > + dma_fence_signal(&fence->base);
> > return true;
> > }
> > return false;
> > @@ -550,7 +537,6 @@ long radeon_fence_wait_timeout(struct radeon_fence
> > *fence, bool intr, long timeo
> > {
> > uint64_t seq[RADEON_NUM_RINGS] = {};
> > long r;
> > - int r_sig;
> > /*
> > * This function should not be called on !radeon fences.
> > @@ -567,9 +553,7 @@ long radeon_fence_wait_timeout(struct radeon_fence
> > *fence, bool intr, long timeo
> > return r;
> > }
> > - r_sig = dma_fence_signal(&fence->base);
> > - if (!r_sig)
> > - DMA_FENCE_TRACE(&fence->base, "signaled from fence_wait\n");
> > + dma_fence_signal(&fence->base);
> > return r;
> > }
> > diff --git a/drivers/gpu/drm/scheduler/sched_fence.c
> > b/drivers/gpu/drm/scheduler/sched_fence.c
> > index 69de2c76731f..3736746c47bd 100644
> > --- a/drivers/gpu/drm/scheduler/sched_fence.c
> > +++ b/drivers/gpu/drm/scheduler/sched_fence.c
> > @@ -50,26 +50,12 @@ static void __exit drm_sched_fence_slab_fini(void)
> > void drm_sched_fence_scheduled(struct drm_sched_fence *fence)
> > {
> > - int ret = dma_fence_signal(&fence->scheduled);
> > -
> > - if (!ret)
> > - DMA_FENCE_TRACE(&fence->scheduled,
> > - "signaled from irq context\n");
> > - else
> > - DMA_FENCE_TRACE(&fence->scheduled,
> > - "was already signaled\n");
> > + dma_fence_signal(&fence->scheduled);
> > }
> > void drm_sched_fence_finished(struct drm_sched_fence *fence)
> > {
> > - int ret = dma_fence_signal(&fence->finished);
> > -
> > - if (!ret)
> > - DMA_FENCE_TRACE(&fence->finished,
> > - "signaled from irq context\n");
> > - else
> > - DMA_FENCE_TRACE(&fence->finished,
> > - "was already signaled\n");
> > + dma_fence_signal(&fence->finished);
> > }
> > static const char *drm_sched_fence_get_driver_name(struct dma_fence
> > *fence)
> > diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
> > index 6ffb4b2c6371..4cc119ab272f 100644
> > --- a/include/linux/dma-fence.h
> > +++ b/include/linux/dma-fence.h
> > @@ -590,26 +590,4 @@ struct dma_fence *dma_fence_get_stub(void);
> > struct dma_fence *dma_fence_allocate_private_stub(void);
> > u64 dma_fence_context_alloc(unsigned num);
> > -#define DMA_FENCE_TRACE(f, fmt, args...) \
> > - do { \
> > - struct dma_fence *__ff = (f); \
> > - if (IS_ENABLED(CONFIG_DMA_FENCE_TRACE)) \
> > - pr_info("f %llu#%llu: " fmt, \
> > - __ff->context, __ff->seqno, ##args); \
> > - } while (0)
> > -
> > -#define DMA_FENCE_WARN(f, fmt, args...) \
> > - do { \
> > - struct dma_fence *__ff = (f); \
> > - pr_warn("f %llu#%llu: " fmt, __ff->context, __ff->seqno,\
> > - ##args); \
> > - } while (0)
> > -
> > -#define DMA_FENCE_ERR(f, fmt, args...) \
> > - do { \
> > - struct dma_fence *__ff = (f); \
> > - pr_err("f %llu#%llu: " fmt, __ff->context, __ff->seqno, \
> > - ##args); \
> > - } while (0)
> > -
> > #endif /* __LINUX_DMA_FENCE_H */
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
