ixgbe: DCB, missed translation from 8021Qaz TSA to CEE link strict

The patch below  allowed IEEE 802.1Qaz and CEE DCB hardware
configurations to use common hardware set routines,

commit 88eb696cc6a7af8f9272266965b1a4dd7d6a931b
Author: John Fastabend <john.r.fastabend@intel.com>
Date:   Thu Feb 10 03:02:11 2011 -0800

    ixgbe: DCB, abstract out dcb_config from DCB hardware configuration

However the case when CEE link strict and group strict
are set was missed and are currently being mapped
incorrectly in some configurations.

This patch resolves this.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index 91ff51c53b0..8abef8d588f 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -642,8 +642,9 @@ static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
 {
         struct ixgbe_adapter *adapter = netdev_priv(dev);
         __u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
+        __u8 prio_type[IEEE_8021QAZ_MAX_TCS];
         int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
-        int err;
+        int i, err;
         /* naively give each TC a bwg to map onto CEE hardware */
         __u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};
 
@@ -659,9 +660,28 @@ static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
 
         memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
 
+        /* Map TSA onto CEE prio type */
+        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+                switch (ets->tc_tsa[i]) {
+                case IEEE_8021QAZ_TSA_STRICT:
+                        prio_type[i] = 2;
+                        break;
+                case IEEE_8021QAZ_TSA_ETS:
+                        prio_type[i] = 0;
+                        break;
+                default:
+                        /* Hardware only supports priority strict or
+                         * ETS transmission selection algorithms if
+                         * we receive some other value from dcbnl
+                         * throw an error
+                         */
+                        return -EINVAL;
+                }
+        }
+
         ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
         err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
-                                      bwg_id, ets->tc_tsa);
+                                      bwg_id, prio_type);
         return err;
 }