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Subject: Re: [virtio-comment] [PATCH v6] virtio-i2c: add the device specification
On Thu, Dec 24, 2020 at 04:10:43PM +0800, Jie Deng wrote: > +\begin{lstlisting} > +struct virtio_i2c_out_hdr { > + le16 addr; > + le16 padding; > + le32 flags; > +}; > +\end{lstlisting} > + > +\begin{lstlisting} > +struct virtio_i2c_in_hdr { > + u8 status; > +}; > +\end{lstlisting} > + > +\begin{lstlisting} > +struct virtio_i2c_req { > + struct virtio_i2c_out_hdr out_hdr; > + u8 write_buf[]; > + u8 read_buf[]; > + struct virtio_i2c_in_hdr in_hdr; > +}; > +\end{lstlisting} I didn't notice that the written and read fields were removed. Does this mean that struct virtio_i2c_req can either be read or write, but not read+write? This makes sense if virtqueue buffers can be grouped together so bi-directional transfers can be described using multiple buffers. Just wanted to check if I understand this correctly. Thanks, Stefan
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