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Type:
Sub-task
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Status: Resolved
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: virtio 1.0 csprd01
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Fix Version/s: virtio 1.0 csprd03
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Labels:None
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Environment:
Reported-by: Andrew Thornton <andrewth@google.com>
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Proposal:
4.1.2.1 Common Configuration structure layout
device_status
The spec states "
Writing 0 resets the device
". H
ow does the driver know when its complete. Proposal
:
the resetting driver will poll this register for a non-zero value until the reset is complete after which DMA and interrupts will not occur.
queue_size
Is there a way to find the maximum queue size without resetting the whole device?
queue_enable
What happens to the state of the queue when queue_enable transitions from non-zero to zero?
queue_desc/queue_avail/queue_used
Does a zero address indicate a disabled queue? This is how current devices work but spec clarification would be useful.