Several fixes to these drivers. Note that these two drivers are actually

just two different attachments (EISA and PCI) to a single driver.
- Add real locking.  Previously these drivers only acquired their lock
  in their interrupt handler or in the ioctl routine (but too broadly in
  the latter).  No locking was used for the stack calling down into the
  driver via if_init() or if_start(), for device shutdown or detach.  Also,
  the interrupt handler held the driver lock while calling if_input().  All
  this stuff should be fixed in the locking changes.
- Really fix these drivers to handle if_alloc().  The front-end attachments
  were using if_initname() before the ifnet was allocated.  Fix this by
  moving some of the duplicated logic from each driver into pdq_ifattach().
  While here, make pdq_ifattach() return an error so that the driver just
  fails to attach if if_alloc() fails rather than panic'ing.  Also, defer
  freeing the ifnet until the driver has stopped using it during detach.
- Add a new private timer to drive the watchdog timer.
- Pass the softc pointer to the interrupt handlers instead of the device_t
  so we can avoid the use of device_get_softc() and to better match what
  other drivers do.

1 files changed, 5 insertions, 1 deletions

diff --git a/sys/dev/pdq/pdq_freebsd.h b/sys/dev/pdq/pdq_freebsd.h
index cdbf389..6efd684 100644
--- a/sys/dev/pdq/pdq_freebsd.h
+++ b/sys/dev/pdq/pdq_freebsd.h
@@ -124,10 +124,13 @@ typedef struct _pdq_os_ctx_t {
 	void *			irq_ih;
 
 	struct mtx		mtx;
+	struct callout		watchdog;
+	int			timer;
 } pdq_softc_t;
 
 #define PDQ_LOCK(_sc)		mtx_lock(&(_sc)->mtx)
 #define PDQ_UNLOCK(_sc)		mtx_unlock(&(_sc)->mtx)
+#define	PDQ_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->mtx, MA_OWNED)
 
 #define	PDQ_OS_HDR_OFFSET	PDQ_RX_FC_OFFSET
 
@@ -255,7 +258,8 @@ pdq_state_t	pdq_stop (pdq_t *pdq);
  * OS dependent functions provided by
  * pdq_ifsubr.c or pdq.c to the bus front ends
  */
-void		pdq_ifattach (pdq_softc_t *, const pdq_uint8_t *);
+int		pdq_ifattach (pdq_softc_t *, const pdq_uint8_t *,
+			      pdq_type_t type);
 void		pdq_ifdetach (pdq_softc_t *);
 void		pdq_free (device_t);
 int		pdq_interrupt (pdq_t *pdq);