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    Danilo Krummrich authored
    Report the maximum number of IBs that can be pushed with a single
    DRM_IOCTL_NOUVEAU_EXEC through DRM_IOCTL_NOUVEAU_GETPARAM.
    
    While the maximum number of IBs per ring might vary between chipsets,
    the kernel will make sure that userspace can only push a fraction of the
    maximum number of IBs per ring per job, such that we avoid a situation
    where there's only a single job occupying the ring, which could
    potentially lead to the ring run dry.
    
    Using DRM_IOCTL_NOUVEAU_GETPARAM to report the maximum number of IBs
    that can be pushed with a single DRM_IOCTL_NOUVEAU_EXEC implies that
    all channels of a given device have the same ring size.
    
    Reviewed-by: default avatarDave Airlie <airlied@redhat.com>
    Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
    Acked-by: default avatarFaith Ekstrand <faith.ekstrand@collabora.com>
    Signed-off-by: default avatarDanilo Krummrich <dakr@redhat.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20231002135008.10651-3-dakr@redhat.com
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