K 10
svn:author
V 7
yongari
K 8
svn:date
V 27
2010-01-06T23:42:15.593601Z
K 7
svn:log
V 902
MFC r199667-199668

r199667:
  Cache Rx producer/Tx consumer index as soon as we know status block
  update and then clear status block. Previously it used to access
  these index without synchronization which may cause problems when
  bounce buffers are used. Also add missing bus_dmamap_sync(9) in
  polling handler. Since we now update status block in driver, adjust
  bus_dmamap_sync(9) for status block.

r199668:
  For MSI case, interrupt is not shared and we don't need to force
  PCI flush to get correct status block update. Add an optimized
  interrupt handler that is activated for MSI case. Actual interrupt
  handling is done by taskqueue such that the handler does not
  require driver lock for Rx path. The MSI capable bge(4) controllers
  automatically disables further interrupt once it enters interrupt
  state so we don't need PIO access to disable interrupt in interrupt
  handler.

END