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[OASIS Issue Tracker] (VIRTIO-103) PCI Common configuration layout

From: Rusty Russell
To: [email protected]
Date: Tue, 29 Apr 2014 03:44:00 -0000

Rusty Russell created VIRTIO-103: ------------------------------------ Summary: PCI Common configuration layout Key: VIRTIO-103 URL: https://tools.oasis-open.org/issues/browse/VIRTIO-103 Project: OASIS Virtual I/O Device (VIRTIO) TC Issue Type: Sub-task Affects Versions: virtio 1.0 csprd01 Reporter: Rusty Russell Assignee: Rusty Russell 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. -- This message was sent by Atlassian JIRA (v6.2.2#6258)