netdev - [PATCH net-next 6/24] bnx2x: disable fairness if ETS is enabled

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Date:	Tue, 14 Jun 2011 14:33:13 +0300
From:	"Vlad Zolotarov" <vladz@...adcom.com>
To:	"Dave Miller" <davem@...emloft.net>
cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Eilon Greenstein" <eilong@...adcom.com>,
	"Dmitry Kravkov" <dmitry@...adcom.com>,
	"Yaniv Rosner" <yaniv.rosner@...adcom.com>
Subject: [PATCH net-next 6/24] bnx2x: disable fairness if ETS is enabled

From: Dmitry Kravkov <dmitry@...adcom.com>

Signed-off-by: Dmitry Kravkov <dmitry@...adcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
 drivers/net/bnx2x/bnx2x_dcb.h  |    2 ++
 drivers/net/bnx2x/bnx2x_main.c |    8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bnx2x/bnx2x_dcb.h b/drivers/net/bnx2x/bnx2x_dcb.h
index bed369d..5bedd85 100644
--- a/drivers/net/bnx2x/bnx2x_dcb.h
+++ b/drivers/net/bnx2x/bnx2x_dcb.h
@@ -60,6 +60,8 @@ struct bnx2x_dcbx_port_params {
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_DISABLE		0
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_ENABLE		1
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_INVALID	(BNX2X_DCBX_CONFIG_INV_VALUE)
+#define BNX2X_IS_ETS_ENABLED(bp) ((bp)->dcb_state == BNX2X_DCB_STATE_ON &&\
+				  (bp)->dcbx_port_params.ets.enabled)
 
 struct bnx2x_config_lldp_params {
 	u32 overwrite_settings;
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index e5eb2a2..e6439a3 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -1931,8 +1931,12 @@ static void bnx2x_calc_vn_weight_sum(struct bnx2x *bp)
 		bp->vn_weight_sum += vn_min_rate;
 	}
 
-	/* ... only if all min rates are zeros - disable fairness */
-	if (all_zero) {
+	/* if ETS or all min rates are zeros - disable fairness */
+	if (BNX2X_IS_ETS_ENABLED(bp)) {
+		bp->cmng.flags.cmng_enables &=
+					~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
+		DP(NETIF_MSG_IFUP, "Fairness will be disabled due to ETS\n");
+	} else if (all_zero) {
 		bp->cmng.flags.cmng_enables &=
 					~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
 		DP(NETIF_MSG_IFUP, "All MIN values are zeroes"
-- 
1.7.2.2


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