Am 23.07.19 um 16:07 schrieb Zhou, David(ChunMing):
> 在 2019/7/23 21:58, Koenig, Christian 写道:
>> Am 23.07.19 um 07:22 schrieb Chunming Zhou:
>>> user space needs a flexiable query ability.
>>> So that umd can get last signaled or submitted point.
>>>
>>> Change-Id: I6512b430524ebabe715e602a2bf5abb0a7e780ea
>>> Signed-off-by: Chunming Zhou <david1.z...@amd.com>
>>> Cc: Lionel Landwerlin <lionel.g.landwer...@intel.com>
>>> Cc: Christian König <christian.koe...@amd.com>
>> I've recently found a bug in drm_syncobj_query_ioctl() which I'm going
>> to commit tomorrow.
> Yes, I've realized. Loinel has put RB on it.
>
>
>> Apart from that it looks good to me,
> Thanks,
>
>
>> but I think we should cleanup a bit
>> and move the dma_fence_chain_for_each()... into a helper function in
>> dma-fence-chain.c
> Do you mind a saperate cleanup patch for that? I don't want to touch
> kernel directory in this patch, so that we can cherry-pick it easily.
Yeah, works for me as well.
Christian.
>
>
> -David
>
>> Christian.
>>
>>> ---
>>> drivers/gpu/drm/drm_syncobj.c | 36 +++++++++++++++++------------------
>>> include/uapi/drm/drm.h | 3 ++-
>>> 2 files changed, 20 insertions(+), 19 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
>>> index 3d400905100b..f70dedf3ef4f 100644
>>> --- a/drivers/gpu/drm/drm_syncobj.c
>>> +++ b/drivers/gpu/drm/drm_syncobj.c
>>> @@ -1197,9 +1197,6 @@ drm_syncobj_timeline_signal_ioctl(struct drm_device
>>> *dev, void *data,
>>> if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
>>> return -EOPNOTSUPP;
>>>
>>> - if (args->pad != 0)
>>> - return -EINVAL;
>>> -
>>> if (args->count_handles == 0)
>>> return -EINVAL;
>>>
>>> @@ -1268,9 +1265,6 @@ int drm_syncobj_query_ioctl(struct drm_device *dev,
>>> void *data,
>>> if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
>>> return -EOPNOTSUPP;
>>>
>>> - if (args->pad != 0)
>>> - return -EINVAL;
>>> -
>>> if (args->count_handles == 0)
>>> return -EINVAL;
>>>
>>> @@ -1291,23 +1285,29 @@ int drm_syncobj_query_ioctl(struct drm_device *dev,
>>> void *data,
>>> if (chain) {
>>> struct dma_fence *iter, *last_signaled = NULL;
>>>
>>> - dma_fence_chain_for_each(iter, fence) {
>>> - if (!iter)
>>> - break;
>>> - dma_fence_put(last_signaled);
>>> - last_signaled = dma_fence_get(iter);
>>> - if
>>> (!to_dma_fence_chain(last_signaled)->prev_seqno)
>>> - /* It is most likely that timeline has
>>> - * unorder points. */
>>> - break;
>>> + if (args->flags &
>>> + DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) {
>>> + point = fence->seqno;
>>> + } else {
>>> + dma_fence_chain_for_each(iter, fence) {
>>> + if (!iter)
>>> + break;
>>> + dma_fence_put(last_signaled);
>>> + last_signaled = dma_fence_get(iter);
>>> + if
>>> (!to_dma_fence_chain(last_signaled)->prev_seqno)
>>> + /* It is most likely that
>>> timeline has
>>> + * unorder points. */
>>> + break;
>>> + }
>>> + point = dma_fence_is_signaled(last_signaled) ?
>>> + last_signaled->seqno :
>>> +
>>> to_dma_fence_chain(last_signaled)->prev_seqno;
>>> }
>>> - point = dma_fence_is_signaled(last_signaled) ?
>>> - last_signaled->seqno :
>>> - to_dma_fence_chain(last_signaled)->prev_seqno;
>>> dma_fence_put(last_signaled);
>>> } else {
>>> point = 0;
>>> }
>>> + dma_fence_put(fence);
>>> ret = copy_to_user(&points[i], &point,
>>> sizeof(uint64_t));
>>> ret = ret ? -EFAULT : 0;
>>> if (ret)
>>> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
>>> index 661d73f9a919..fd987ce24d9f 100644
>>> --- a/include/uapi/drm/drm.h
>>> +++ b/include/uapi/drm/drm.h
>>> @@ -777,11 +777,12 @@ struct drm_syncobj_array {
>>> __u32 pad;
>>> };
>>>
>>> +#define DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED (1 << 0) /* last available
>>> point on timeline syncobj */
>>> struct drm_syncobj_timeline_array {
>>> __u64 handles;
>>> __u64 points;
>>> __u32 count_handles;
>>> - __u32 pad;
>>> + __u32 flags;
>>> };
>>>
>>>
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