DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH] net/ixgbe: fix TC bandwidth setting
@ 2017-03-24  2:51 Wenzhuo Lu
  2017-03-24 16:15 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
  0 siblings, 1 reply; 2+ messages in thread
From: Wenzhuo Lu @ 2017-03-24  2:51 UTC (permalink / raw)
  To: dev; +Cc: Wenzhuo Lu, stable

4 and 8 TCs are supported on ixgbe. By default there're
8 TCs. So when initializing the device, the bandwidth for
8 TCs is set.
When changing the TC number, it's only considered setting
the bandwidth for 4 TCs. If the user change the number
from 4 to 8, the TCs' bandwidth is not right.

Fixes: 0807f80d35d0 (ixgbe: DCB / flow control)
CC: stable@dpdk.org

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 9502432..9294a0d 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -3758,6 +3758,15 @@ void __attribute__((cold))
 			tc->path[IXGBE_DCB_TX_CONFIG].bwg_percent = 0;
 			tc->path[IXGBE_DCB_RX_CONFIG].bwg_percent = 0;
 		}
+	} else {
+		/* Re-configure 8 TCs BW */
+		for (i = 0; i < nb_tcs; i++) {
+			tc = &dcb_config->tc_config[i];
+			tc->path[IXGBE_DCB_TX_CONFIG].bwg_percent =
+				(uint8_t)(100 / nb_tcs + (i & 1));
+			tc->path[IXGBE_DCB_RX_CONFIG].bwg_percent =
+				(uint8_t)(100 / nb_tcs + (i & 1));
+		}
 	}
 
 	switch (hw->mac.type) {
-- 
1.9.3

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2017-03-24 16:15 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-03-24  2:51 [dpdk-dev] [PATCH] net/ixgbe: fix TC bandwidth setting Wenzhuo Lu
2017-03-24 16:15 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).