diff options
| author | cornelia.huck <cornelia.huck@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-10-15 08:45:14 +0000 |
|---|---|---|
| committer | cornelia.huck <cornelia.huck@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-10-15 08:45:14 +0000 |
| commit | a29c58e6a7b35c835b597abc9efc1525080f4bc9 (patch) | |
| tree | 813bc6ada888399d5f68de50d14ba79b5ff97375 /virtio-v1.0-wd01-part1-specification.txt | |
| parent | ce8f8738ef0334a13001008cabb77d9139242df7 (diff) | |
virtio-ccw: clarify sense id operation
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@65 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
Diffstat (limited to 'virtio-v1.0-wd01-part1-specification.txt')
| -rw-r--r-- | virtio-v1.0-wd01-part1-specification.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt index 5aad07e..66d3bab 100644 --- a/virtio-v1.0-wd01-part1-specification.txt +++ b/virtio-v1.0-wd01-part1-specification.txt @@ -1544,6 +1544,28 @@ normal channel subsystem device discovery (usually a STORE SUBCHANNEL loop) and answers to the basic channel commands, most importantly SENSE ID. +For a virtio-ccw proxy device, SENSE ID will return the following +information: + +------------------------------------------------------ +| Bytes | Contents | +|-------|--------------------------------------------| +| 0 | reserved | 0xff | +|-------|-----------------------|--------------------| +| 1-2 | control unit type | 0x3832 | +|-------|-----------------------|--------------------| +| 3 | control unit model | <virtio device id> | +|-------|-----------------------|--------------------| +| 4-5 | device type | zeroes (unset) | +|-------|-----------------------|--------------------| +| 6 | device model | zeroes (unset) | +|-------|-----------------------|--------------------| +| 7-255 | extended SenseId data | zeroes (unset) | +------------------------------------------------------ + +A driver for virtio-ccw devices MUST check for a control unit +type of 0x3832 and MUST ignore the device type and model. + In addition to the basic channel commands, virtio-ccw defines a set of channel commands related to configuration and operation of virtio: |