CVS commit: src/sys/dev/pci

[Tohru Nishimura <nisimura%netbsd.org@localhost>]

Module Name:    src
Committed By:   nisimura
Date:           Sun Oct  7 07:23:58 UTC 2007

Modified Files:
        src/sys/dev/pci: if_kse.c

Log Message:
A typo fix in one of comments and some adjustments of register field names.
No functionality change intented.

IHAE "IP Header Alignment Enable" feature of RXC register;
- careful cross referencing at KSZ8692P/8841P/8842P PDFs indicates IHEA
  bit works as follows; When the feature is turned on, Rx DMA engine
  will populate Rx frame data in the Rx memory with +2 or +3 byte swifted
  to make its IP head field 32bit aligned.  The shift amount is recorded
  inside RDES0 to tell 0, 2 or 3.  The automatic alignment is done only
  when IHAE is enabled _and_ the Rx frame was IP frame.  In other cases,
  RDES0 swift amount field keeps 0.
- KSZ8841P document mentions the IHAE bit but its reference link is broken
  to tell the new RDES0 field.  KSZ8842P lacks both.  The bit usage of
  RDES0 23:20 seems different from KSZ8692P, which brings me a vague
  suspiction of documentation error.


To generate a diff of this commit:
cvs rdiff -r1.4 -r1.5 src/sys/dev/pci/if_kse.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.