diff options
| author | Dave Ertman <david.m.ertman@intel.com> | 2021-08-06 13:53:56 -0700 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-09-28 09:42:04 -0700 |
| commit | 2a87bd73e50d1c71392c036b0b31c9b2418981d0 (patch) | |
| tree | 05715bdc3162014a342d4a01c0938b5a837015e9 /drivers/net/ethernet/intel/ice/ice_txrx.c | |
| parent | 1e0083bd0777e4a418a6710d9ee04b979cdbe5cc (diff) | |
ice: Add DSCP support
Implement code to handle submission of APP TLV's
containing DSCP to TC mapping.
The first such mapping received on an interface
will cause that PF to switch to L3 DSCP QoS mode,
apply the default config for that mode, and apply
the received mapping.
Only one such mapping will be allowed per DSCP value,
and when the last DSCP mapping is deleted, the PF
will switch back into L2 VLAN QoS mode, applying the
appropriate default QoS settings.
L3 DSCP QoS mode will only be allowed in SW DCBx
mode, in other words, when the FW LLDP engine is
disabled. Commands that break this mutual exclusivity
will be blocked.
Co-developed-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_txrx.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_txrx.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index 6ee8e0032d52..13b2bdc25b0d 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -6,6 +6,7 @@ #include <linux/prefetch.h> #include <linux/mm.h> #include <linux/bpf_trace.h> +#include <net/dsfield.h> #include <net/xdp.h> #include "ice_txrx_lib.h" #include "ice_lib.h" @@ -2296,6 +2297,39 @@ netdev_tx_t ice_start_xmit(struct sk_buff *skb, struct net_device *netdev) } /** + * ice_get_dscp_up - return the UP/TC value for a SKB + * @dcbcfg: DCB config that contains DSCP to UP/TC mapping + * @skb: SKB to query for info to determine UP/TC + * + * This function is to only be called when the PF is in L3 DSCP PFC mode + */ +static u8 ice_get_dscp_up(struct ice_dcbx_cfg *dcbcfg, struct sk_buff *skb) +{ + u8 dscp = 0; + + if (skb->protocol == htons(ETH_P_IP)) + dscp = ipv4_get_dsfield(ip_hdr(skb)) >> 2; + else if (skb->protocol == htons(ETH_P_IPV6)) + dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> 2; + + return dcbcfg->dscp_map[dscp]; +} + +u16 +ice_select_queue(struct net_device *netdev, struct sk_buff *skb, + struct net_device *sb_dev) +{ + struct ice_pf *pf = ice_netdev_to_pf(netdev); + struct ice_dcbx_cfg *dcbcfg; + + dcbcfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg; + if (dcbcfg->pfc_mode == ICE_QOS_MODE_DSCP) + skb->priority = ice_get_dscp_up(dcbcfg, skb); + + return netdev_pick_tx(netdev, skb, sb_dev); +} + +/** * ice_clean_ctrl_tx_irq - interrupt handler for flow director Tx queue * @tx_ring: tx_ring to clean */ |