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ixgbe: DCB X540 devices support max traffic class of 4

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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>
This commit is contained in:
John Fastabend 2011-09-27 03:52:01 +00:00 committed by Jeff Kirsher
parent 32701dc2e6
commit 4de2a0224a
2 changed files with 19 additions and 3 deletions
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21
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -4990,17 +4990,32 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
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 @@ int ixgbe_setup_tc(struct net_device *dev, u8 tc)
}
/* 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;

1
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -406,6 +406,7 @@
/* DCB registers */
#define MAX_TRAFFIC_CLASS 8
#define X540_TRAFFIC_CLASS 4
#define IXGBE_RMCS 0x03D00
#define IXGBE_DPMCS 0x07F40
#define IXGBE_PDPMCS 0x0CD00