cvs commit: src/sys/dev/netif/bge if_bge.c

[Sepherosa Ziehau <sephe@xxxxxxxxxxxxxxxxxxxxxxx>]

sephe       2007/06/22 08:26:18 PDT

DragonFly src repository

  Modified files:
    sys/dev/netif/bge    if_bge.c 
  Log:
  - Factor out bge_{disable,enable}_intr().
  - In bge_enable_intr(), trigger another hardware interrupt after clearing
    interrupt mask, since any writing to BGE_MBX_IRQ0_LO will acknowledge
    interrupts.  Add comment about it.
  - In bge_disable_intr(), acknowledge and disable interrupt by writing 1 to
    BGE_MBX_IRQ0_LO, since setting interrupt mask itself does not de-assert
    a currently asserted interrupt.  Add comment about it.
  - Since we have explicitly disabled interrupt using BGE_MBX_IRQ0_LO, set
    "RX/TX coalesced BD count during interrupt" to 1.  In this way, RX/TX
    coalescing engine will properly update status block, which contains RX/TX
    descriptor index.  This only affects polling(4) operation, since we don't
    have a "during interrupt" period in our interrupt handler.
  - Fix comment.
  
  Tested-with: 5751, 5701(altima)
  
  Revision  Changes    Path
  1.84      +55 -16    src/sys/dev/netif/bge/if_bge.c


http://www.dragonflybsd.org/cvsweb/src/sys/dev/netif/bge/if_bge.c.diff?r1=1.83&r2=1.84&f=u