cvs commit: src/sys/compat/ndis ntoskrnl_var.h subr_ndis.c subr_ntoskrnl.c

[Bill Paul]

wpaul       2005-05-19 04:44:26 UTC

  FreeBSD src repository

  Modified files:
    sys/compat/ndis      ntoskrnl_var.h subr_ndis.c 
                         subr_ntoskrnl.c 
  Log:
  Fix some of the things I broke so that the SMC2602W (AMD Am1772) driver
  works again.
  
  This driver uses NdisScheduleWorkItem(), and we have to take special steps
  to insure that its workitems don't collide with any of the other workitems
  used by the NDISulator. In particular, if one of the driver's work jobs
  blocks, it can prevent NdisMAllocateSharedMemoryAsync() from completing
  when expected.
  
  The original hack to fix this was to have NdisMAllocateSharedMemoryAsync()
  defer its work to the DPC queue instead of the general task queue. To
  fix it now, I decided to add some additional workitem threads. (There's
  supposed to be a pool of worker threads in Windows anyway.) Currently,
  there are 4. There should be at least 2. One is reserved for the legacy
  ExQueueWorkItem() API, while the others are used in round-robin by the
  IoQueueWorkItem() API. NdisMAllocateSharedMemoryAsync() uses the latter
  API while NdisScheduleWorkItem() uses the former, so the deadlock is
  avoided.
  
  Fixed NdisMRegisterDevice()/NdisMDeregisterDevice() to work a little
  more sensibly with the new driver_object/device_object framework. It
  doesn't really register a working user-mode interface, but the existing
  code was completely wrong for the new framework.
  
  Fixed a couple of bugs dealing with the cancellation of events and
  DPCs. When cancelling an event that's still on the timer queue (i.e.
  hasn't expired yet), reset dh_inserted in its dispatch header to FALSE.
  Previously, it was left set to TRUE, which would make a cancelled
  timer appear to have not been cancelled. Also, when removing a DPC
  from a queue, reset its list pointers, otherwise a cancelled DPC
  might mistakenly be treated as still pending.
  
  Lastly, fix the behavior of ntoskrnl_wakeup() when dealing with
  objects that have nobody waiting on them: sync event objects get
  their signalled state reset to FALSE, but notification objects
  should still be set to TRUE.
  
  Revision  Changes    Path
  1.36      +6 -1      src/sys/compat/ndis/ntoskrnl_var.h
  1.92      +11 -5     src/sys/compat/ndis/subr_ndis.c
  1.69      +81 -26    src/sys/compat/ndis/subr_ntoskrnl.c