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authorJohn Fastabend <john.r.fastabend@intel.com>2011-02-23 05:58:19 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-03-12 04:12:54 -0800
commit17049d30c2dec6f26d6165cc135578f9e41d53d3 (patch)
treeb58a6c005d89c15a58213cc2e62e9d4de81d8c37 /drivers/net/ixgbe/ixgbe_dcb_nl.c
parent3b97fd695453ced96f22bdf1a84453f6744d25cc (diff)
ixgbe: IEEE 802.1Qaz, implement priority assignment table
This patch adds support to use the priority assignment table in the ieee_ets structure to map priorities to traffic classes. Previously ixgbe only supported a 1:1 mapping. Now we can enable and disable hardware DCB support when multiple traffic classes are actually being used. This allows the default case all priorities mapped to traffic class 0 to work in normal hardware mode and utilize the full packet buffer. This patch does not address putting the hardware in 4TC mode so packet buffer space may be underutilized in this case. A follow up patch can address this optimization. But at least we have the hooks to do this now. Also CEE will behave as it always has and map priorities 1:1 with traffic classes. 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>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_dcb_nl.c')
-rw-r--r--drivers/net/ixgbe/ixgbe_dcb_nl.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index 8abef8d588fd..fec4c724c37a 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -416,6 +416,8 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
+ /* Priority to TC mapping in CEE case default to 1:1 */
+ u8 prio_tc[MAX_TRAFFIC_CLASS] = {0, 1, 2, 3, 4, 5, 6, 7};
int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
#ifdef CONFIG_FCOE
@@ -437,7 +439,7 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
DCB_TX_CONFIG, prio_type);
ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
- bwg_id, prio_type);
+ bwg_id, prio_type, prio_tc);
}
if (adapter->dcb_cfg.pfc_mode_enable)
@@ -645,6 +647,7 @@ static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
__u8 prio_type[IEEE_8021QAZ_MAX_TCS];
int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
int i, err;
+ __u64 *p = (__u64 *) ets->prio_tc;
/* 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};
@@ -679,9 +682,14 @@ static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
}
}
+ if (*p)
+ ixgbe_dcbnl_set_state(dev, 1);
+ else
+ ixgbe_dcbnl_set_state(dev, 0);
+
ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
- bwg_id, prio_type);
+ bwg_id, prio_type, ets->prio_tc);
return err;
}