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.