ixgbe: DCB X540 devices support max traffic class of 4
X540 devices can only support up to 4 traffic classes and
guarantee a "lossless" traffic class on some platforms.
This patch sets the X540 devices to initialize a max
traffic class value of 4 at probe time.
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>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 2b8ff95..1f936c8 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -4990,17 +4990,32 @@
spin_lock_init(&adapter->fdir_perfect_lock);
#ifdef CONFIG_IXGBE_DCB
+ switch (hw->mac.type) {
+ case ixgbe_mac_X540:
+ adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
+ adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
+ break;
+ default:
+ adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
+ adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
+ break;
+ }
+
/* Configure DCB traffic classes */
for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
tc = &adapter->dcb_cfg.tc_config[j];
tc->path[DCB_TX_CONFIG].bwg_id = 0;
tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
- tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 1 << j;
tc->path[DCB_RX_CONFIG].bwg_id = 0;
tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
- tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 1 << j;
tc->dcb_pfc = pfc_disabled;
}
+
+ /* Initialize default user to priority mapping, UPx->TC0 */
+ tc = &adapter->dcb_cfg.tc_config[0];
+ tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
+ tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
+
adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
adapter->dcb_cfg.pfc_mode_enable = false;
@@ -7019,7 +7034,7 @@
}
/* Hardware supports up to 8 traffic classes */
- if (tc > MAX_TRAFFIC_CLASS ||
+ if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
(hw->mac.type == ixgbe_mac_82598EB && tc < MAX_TRAFFIC_CLASS))
return -EINVAL;