diff options
| author | Suman Ghosh <sumang@marvell.com> | 2022-08-30 17:33:04 +0530 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-09-01 09:37:47 +0200 |
| commit | 99c969a83d8275bb396f6209dff2aa4cedaeb644 (patch) | |
| tree | ba548f1a568f16654382c617e329a88d1ee6e10d /drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | |
| parent | a102c8973db7f7b7b6f75d51eed145d070438a49 (diff) | |
octeontx2-pf: Add egress PFC support
As of now all transmit queues transmit packets out of same scheduler
queue hierarchy. Due to this PFC frames sent by peer are not handled
properly, either all transmit queues are backpressured or none.
To fix this when user enables PFC for a given priority map relavant
transmit queue to a different scheduler queue hierarcy, so that
backpressure is applied only to the traffic egressing out of that TXQ.
Signed-off-by: Suman Ghosh <sumang@marvell.com>
Link: https://lore.kernel.org/r/20220830120304.158060-1-sumang@marvell.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c index 9376d0e62914..49a4ff01cecb 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c @@ -1389,18 +1389,40 @@ static int otx2_init_hw_resources(struct otx2_nic *pf) goto err_free_sq_ptrs; } +#ifdef CONFIG_DCB + if (pf->pfc_en) { + err = otx2_pfc_txschq_alloc(pf); + if (err) { + mutex_unlock(&mbox->lock); + goto err_free_sq_ptrs; + } + } +#endif + err = otx2_config_nix_queues(pf); if (err) { mutex_unlock(&mbox->lock); goto err_free_txsch; } + for (lvl = 0; lvl < NIX_TXSCH_LVL_CNT; lvl++) { - err = otx2_txschq_config(pf, lvl); + err = otx2_txschq_config(pf, lvl, 0, false); + if (err) { + mutex_unlock(&mbox->lock); + goto err_free_nix_queues; + } + } + +#ifdef CONFIG_DCB + if (pf->pfc_en) { + err = otx2_pfc_txschq_config(pf); if (err) { mutex_unlock(&mbox->lock); goto err_free_nix_queues; } } +#endif + mutex_unlock(&mbox->lock); return err; @@ -1455,6 +1477,11 @@ static void otx2_free_hw_resources(struct otx2_nic *pf) if (err) dev_err(pf->dev, "RVUPF: Failed to stop/free TX schedulers\n"); +#ifdef CONFIG_DCB + if (pf->pfc_en) + otx2_pfc_txschq_stop(pf); +#endif + mutex_lock(&mbox->lock); /* Disable backpressure */ if (!(pf->pcifunc & RVU_PFVF_FUNC_MASK)) @@ -1853,6 +1880,30 @@ static netdev_tx_t otx2_xmit(struct sk_buff *skb, struct net_device *netdev) return NETDEV_TX_OK; } +static u16 otx2_select_queue(struct net_device *netdev, struct sk_buff *skb, + struct net_device *sb_dev) +{ + struct otx2_nic *pf = netdev_priv(netdev); +#ifdef CONFIG_DCB + u8 vlan_prio; +#endif + +#ifdef CONFIG_DCB + if (!skb->vlan_present) + goto pick_tx; + + vlan_prio = skb->vlan_tci >> 13; + if ((vlan_prio > pf->hw.tx_queues - 1) || + !pf->pfc_alloc_status[vlan_prio]) + goto pick_tx; + + return vlan_prio; + +pick_tx: +#endif + return netdev_pick_tx(netdev, skb, NULL); +} + static netdev_features_t otx2_fix_features(struct net_device *dev, netdev_features_t features) { @@ -2447,6 +2498,7 @@ static const struct net_device_ops otx2_netdev_ops = { .ndo_open = otx2_open, .ndo_stop = otx2_stop, .ndo_start_xmit = otx2_xmit, + .ndo_select_queue = otx2_select_queue, .ndo_fix_features = otx2_fix_features, .ndo_set_mac_address = otx2_set_mac_address, .ndo_change_mtu = otx2_change_mtu, |