CVS commit: [netbsd-8] src/sys/dev/pci

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Sun Sep 23 17:39:02 UTC 2018

Modified Files:
        src/sys/dev/pci [netbsd-8]: if_wm.c

Log Message:
Pull up following revision(s) (requested by msaitoh in ticket #1027):
        sys/dev/pci/if_wm.c: revision 1.586
        sys/dev/pci/if_wm.c: revision 1.587
        sys/dev/pci/if_wm.c: revision 1.588

- Split txdrop evcnt into pcqdrop and descdrop.
- Simplify evcnt name by removing duplicated "tx" or "rx".
- s/tu/underrun/

- Try m_defrag() to reduce the number of DMA segment if bus_dmamap_load_mbuf()
   returned EFBIG. When m_defrag() is called, txqNNdefrag event counter is
   incremented. If the 2nd try of bus_dmamap_load_mbuf() failed, txqNNtoomanyseg
   event counter is incremented.

- Reduce the max number of DMA segments from 256 to 64 (it's the same value
   as other BSD's (EM_MAX_SCATTER) and more than before if_wm.c rev. 1.75's
   value (40)) because we do m_defrag() now.

  Fix comment.


To generate a diff of this commit:
cvs rdiff -u -r1.508.4.22 -r1.508.4.23 src/sys/dev/pci/if_wm.c

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