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From: Wenzhuo Lu <wenzhuo.lu@intel.com>
To: dev@dpdk.org
Cc: Wenzhuo Lu <wenzhuo.lu@intel.com>, stable@dpdk.org
Subject: [dpdk-stable] [PATCH] net/ixgbe: fix TC bandwidth setting
Date: Fri, 24 Mar 2017 10:51:03 +0800	[thread overview]
Message-ID: <1490323863-47399-1-git-send-email-wenzhuo.lu@intel.com> (raw)

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

             reply	other threads:[~2017-03-24  2:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-24  2:51 Wenzhuo Lu [this message]
2017-03-24 16:15 ` Ferruh Yigit

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