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firewire: cdev: extend fw_cdev_event_iso_interrupt documentation

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Add information regarding the 2.6.32 update to the xmit variant of
fw_cdev_event_iso_interrupt.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-06-20 22:54:22 +02:00
parent e205597d18
commit 3b2b65d68f
1 changed files with 15 additions and 4 deletions
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19
include/linux/firewire-cdev.h
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@ -204,10 +204,21 @@ struct fw_cdev_event_request2 {
* @header: Stripped headers, if any
*
* This event is sent when the controller has completed an &fw_cdev_iso_packet
* with the %FW_CDEV_ISO_INTERRUPT bit set. In the receive case, the headers
* stripped of all packets up until and including the interrupt packet are
* returned in the @header field. The amount of header data per packet is as
* specified at iso context creation by &fw_cdev_create_iso_context.header_size.
* with the %FW_CDEV_ISO_INTERRUPT bit set.
*
* Isochronous transmit events:
*
* In version 1 of the ABI, &header_length is 0. In version 3 and some
* implementations of version 2 of the ABI, &header_length is a multiple of 4
* and &header contains timestamps of all packets up until the interrupt packet.
* The format of the timestamps is as described below for isochronous reception.
*
* Isochronous receive events:
*
* The headers stripped of all packets up until and including the interrupt
* packet are returned in the @header field. The amount of header data per
* packet is as specified at iso context creation by
* &fw_cdev_create_iso_context.header_size.
*
* In version 1 of this ABI, header data consisted of the 1394 isochronous
* packet header, followed by quadlets from the packet payload if