On 19/11/20 02:41, Jie Deng wrote:
No, the kick is only an advice. The device is allowed to poll on the
ring and ignore kicks completely, for example.
Paolo
Understood. But I saw your proposal can only group two segments
"write-read".
What if we have segments more than two ? for example,
"write-read-read..." or "write-write-write...".
Can we use a flag to tag the START/STOP segments so that they can be
grouped into one transaction ?
Grouping of more than two segments is not particularly common, a lot of
host devices might not support it (unless they simply do bitbanging).
On the other hand grouping of two segments _is_ common enough that it is
probably supported by many host devices, and worth supporting it in
virtio-i2c.
You can certainly add an "u32 flags" to the buffer for future
extensibility. That's a good idea regardless.
Paolo
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