[PATCH net-next 3/9] tg3: Nullify RSS for loopback test
DORMANTno replies
REVIEWED: 1 (1M)
From: Matt Carlson <hidden>
Date: 2011-04-20 17:48:26
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
1 review trailer.
The loopback test assumes all traffic goes to the first rx queue. There is a 1 in 4 chance this won't be true if RSS is enabled though. This patch reprograms the RSS indirection table to route all rx packets to the first queue. Signed-off-by: Matt Carlson <redacted> Reviewed-by: Michael Chan <mchan@broadcom.com> --- drivers/net/tg3.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 4aecb0a..1f233c4 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c@@ -11269,6 +11269,15 @@ static int tg3_test_loopback(struct tg3 *tp) goto done; } + if (tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS) { + int i; + + /* Reroute all rx packets to the 1st queue */ + for (i = MAC_RSS_INDIR_TBL_0; + i < MAC_RSS_INDIR_TBL_0 + TG3_RSS_INDIR_TBL_SIZE; i += 4) + tw32(i, 0x0); + } + /* Turn off gphy autopowerdown. */ if (tp->phy_flags & TG3_PHYFLG_ENABLE_APD) tg3_phy_toggle_apd(tp, false);
--
1.7.3.4