bnxt_en: Check hardware resources before enabling NTUPLE.
The hardware resources required to enable NTUPLE varies depending on how many rx channels are configured. We need to make sure we have the resources before we enable NTUPLE. Add bnxt_rfs_capable() to do the checking. In addition, we need to do the same checking in ndo_fix_features(). As the rx channels are changed using ethtool -L, we call netdev_update_features() to make the necessary adjustment for NTUPLE. Calling netdev_update_features() in netif_running() state but before calling bnxt_open_nic() would be a problem. To make this work, bnxt_set_features() has to be modified to test for BNXT_STATE_OPEN for the true hardware state instead of checking netif_running(). Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -4916,9 +4916,32 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
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return rc;
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return rc;
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}
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}
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static bool bnxt_rfs_capable(struct bnxt *bp)
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{
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#ifdef CONFIG_RFS_ACCEL
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struct bnxt_pf_info *pf = &bp->pf;
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int vnics;
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if (BNXT_VF(bp) || !(bp->flags & BNXT_FLAG_MSIX_CAP))
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return false;
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vnics = 1 + bp->rx_nr_rings;
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if (vnics > pf->max_rsscos_ctxs || vnics > pf->max_vnics)
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return false;
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return true;
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#else
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return false;
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#endif
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}
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static netdev_features_t bnxt_fix_features(struct net_device *dev,
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static netdev_features_t bnxt_fix_features(struct net_device *dev,
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netdev_features_t features)
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netdev_features_t features)
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{
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{
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struct bnxt *bp = netdev_priv(dev);
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if (!bnxt_rfs_capable(bp))
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features &= ~NETIF_F_NTUPLE;
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return features;
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return features;
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}
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}
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@ -4959,7 +4982,7 @@ static int bnxt_set_features(struct net_device *dev, netdev_features_t features)
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bp->flags = flags;
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bp->flags = flags;
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if (!netif_running(dev)) {
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if (!test_bit(BNXT_STATE_OPEN, &bp->state)) {
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if (update_tpa)
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if (update_tpa)
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bnxt_set_ring_params(bp);
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bnxt_set_ring_params(bp);
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return rc;
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return rc;
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@ -5639,11 +5662,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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if (bnxt_vf_pciid(ent->driver_data))
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if (bnxt_vf_pciid(ent->driver_data))
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bp->flags |= BNXT_FLAG_VF;
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bp->flags |= BNXT_FLAG_VF;
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if (pdev->msix_cap) {
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if (pdev->msix_cap)
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bp->flags |= BNXT_FLAG_MSIX_CAP;
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bp->flags |= BNXT_FLAG_MSIX_CAP;
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if (BNXT_PF(bp))
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bp->flags |= BNXT_FLAG_RFS;
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}
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rc = bnxt_init_board(pdev, dev);
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rc = bnxt_init_board(pdev, dev);
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if (rc < 0)
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if (rc < 0)
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@ -5662,9 +5682,6 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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NETIF_F_RXHASH |
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NETIF_F_RXHASH |
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NETIF_F_RXCSUM | NETIF_F_LRO | NETIF_F_GRO;
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NETIF_F_RXCSUM | NETIF_F_LRO | NETIF_F_GRO;
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if (bp->flags & BNXT_FLAG_RFS)
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dev->hw_features |= NETIF_F_NTUPLE;
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dev->hw_enc_features =
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dev->hw_enc_features =
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NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SG |
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NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SG |
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NETIF_F_TSO | NETIF_F_TSO6 |
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NETIF_F_TSO | NETIF_F_TSO6 |
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@ -5723,6 +5740,14 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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bp->cp_nr_rings = max_t(int, bp->rx_nr_rings, bp->tx_nr_rings);
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bp->cp_nr_rings = max_t(int, bp->rx_nr_rings, bp->tx_nr_rings);
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bp->num_stat_ctxs = bp->cp_nr_rings;
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bp->num_stat_ctxs = bp->cp_nr_rings;
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if (BNXT_PF(bp)) {
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dev->hw_features |= NETIF_F_NTUPLE;
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if (bnxt_rfs_capable(bp)) {
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bp->flags |= BNXT_FLAG_RFS;
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dev->features |= NETIF_F_NTUPLE;
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}
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}
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if (dev->hw_features & NETIF_F_HW_VLAN_CTAG_RX)
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if (dev->hw_features & NETIF_F_HW_VLAN_CTAG_RX)
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bp->flags |= BNXT_FLAG_STRIP_VLAN;
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bp->flags |= BNXT_FLAG_STRIP_VLAN;
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@ -266,6 +266,8 @@ static int bnxt_set_channels(struct net_device *dev,
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bp->cp_nr_rings = max_t(int, bp->tx_nr_rings, bp->rx_nr_rings);
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bp->cp_nr_rings = max_t(int, bp->tx_nr_rings, bp->rx_nr_rings);
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bp->num_stat_ctxs = bp->cp_nr_rings;
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bp->num_stat_ctxs = bp->cp_nr_rings;
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/* After changing number of rx channels, update NTUPLE feature. */
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netdev_update_features(dev);
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if (netif_running(dev)) {
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if (netif_running(dev)) {
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rc = bnxt_open_nic(bp, true, false);
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rc = bnxt_open_nic(bp, true, false);
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if ((!rc) && BNXT_PF(bp)) {
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if ((!rc) && BNXT_PF(bp)) {
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