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author | jlemon <jlemon@FreeBSD.org> | 2000-11-25 07:35:38 +0000 |
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committer | jlemon <jlemon@FreeBSD.org> | 2000-11-25 07:35:38 +0000 |
commit | 954e1d2ccdb661d5c8b7f69340d118fa7ba7fb85 (patch) | |
tree | 0a4e9f6dcd5fa64a78f5991ac425f3ca97aba154 /sys/pci/if_wxvar.h | |
parent | 2daca11cae375091daf49a7cd704e5e4e1be27db (diff) | |
download | FreeBSD-src-954e1d2ccdb661d5c8b7f69340d118fa7ba7fb85.zip FreeBSD-src-954e1d2ccdb661d5c8b7f69340d118fa7ba7fb85.tar.gz |
Lock down the network interface queues. The queue mutex must be obtained
before adding/removing packets from the queue. Also, the if_obytes and
if_omcasts fields should only be manipulated under protection of the mutex.
IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on
the queue. An IF_LOCK macro is provided, as well as the old (mutex-less)
versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which
needs them, but their use is discouraged.
Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF,
which takes care of locking/enqueue, and also statistics updating/start
if necessary.
Diffstat (limited to 'sys/pci/if_wxvar.h')
-rw-r--r-- | sys/pci/if_wxvar.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/pci/if_wxvar.h b/sys/pci/if_wxvar.h index 71fec0e..c665ef0 100644 --- a/sys/pci/if_wxvar.h +++ b/sys/pci/if_wxvar.h @@ -375,8 +375,12 @@ typedef struct wx_softc { wxtd_t *tdescriptors; /* transmit descriptor ring */ u_int16_t tnxtfree; /* next free index (circular) */ u_int16_t tactive; /* # active */ + struct mtx wx_mtx; } wx_softc_t; +#define WX_LOCK(_sc) mtx_enter(&(_sc)->wx_mtx, MTX_DEF) +#define WX_UNLOCK(_sc) mtx_exit(&(_sc)->wx_mtx, MTX_DEF) + /* * We offset the the receive frame header by two bytes so that the actual * payload is 32 bit aligned. On platforms that require strict structure |