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bnxt_en: Use NETIF_F_GRO_HW.
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Advertise NETIF_F_GRO_HW in hw_features if hardware GRO is supported.
In bnxt_fix_features(), disable GRO_HW and LRO if current hardware
configuration does not allow it.  GRO_HW depends on GRO.  GRO_HW is
also mutually exclusive with LRO.  XDP setup will now rely on
bnxt_fix_features() to turn off aggregation.  During chip init, turn on
or off hardware GRO based on NETIF_F_GRO_HW in features flag.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Michael Chan authored and David S. Miller committed Dec 19, 2017
1 parent 56f5aa7 commit 1054aee
Showing 1 changed file with 20 additions and 7 deletions.
27 changes: 20 additions & 7 deletions drivers/net/ethernet/broadcom/bnxt/bnxt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2755,7 +2755,7 @@ void bnxt_set_tpa_flags(struct bnxt *bp)
return;
if (bp->dev->features & NETIF_F_LRO)
bp->flags |= BNXT_FLAG_LRO;
if (bp->dev->features & NETIF_F_GRO)
else if (bp->dev->features & NETIF_F_GRO_HW)
bp->flags |= BNXT_FLAG_GRO;
}

Expand Down Expand Up @@ -2843,10 +2843,10 @@ int bnxt_set_rx_skb_mode(struct bnxt *bp, bool page_mode)
min_t(u16, bp->max_mtu, BNXT_MAX_PAGE_MODE_MTU);
bp->flags &= ~BNXT_FLAG_AGG_RINGS;
bp->flags |= BNXT_FLAG_NO_AGG_RINGS | BNXT_FLAG_RX_PAGE_MODE;
bp->dev->hw_features &= ~NETIF_F_LRO;
bp->dev->features &= ~NETIF_F_LRO;
bp->rx_dir = DMA_BIDIRECTIONAL;
bp->rx_skb_func = bnxt_rx_page_skb;
/* Disable LRO or GRO_HW */
netdev_update_features(bp->dev);
} else {
bp->dev->max_mtu = bp->max_mtu;
bp->flags &= ~BNXT_FLAG_RX_PAGE_MODE;
Expand Down Expand Up @@ -6788,6 +6788,15 @@ static netdev_features_t bnxt_fix_features(struct net_device *dev,
if ((features & NETIF_F_NTUPLE) && !bnxt_rfs_capable(bp))
features &= ~NETIF_F_NTUPLE;

if (bp->flags & BNXT_FLAG_NO_AGG_RINGS)
features &= ~(NETIF_F_LRO | NETIF_F_GRO_HW);

if (!(features & NETIF_F_GRO))
features &= ~NETIF_F_GRO_HW;

if (features & NETIF_F_GRO_HW)
features &= ~NETIF_F_LRO;

/* Both CTAG and STAG VLAN accelaration on the RX side have to be
* turned on or off together.
*/
Expand Down Expand Up @@ -6821,9 +6830,9 @@ static int bnxt_set_features(struct net_device *dev, netdev_features_t features)
bool update_tpa = false;

flags &= ~BNXT_FLAG_ALL_CONFIG_FEATS;
if ((features & NETIF_F_GRO) && !BNXT_CHIP_TYPE_NITRO_A0(bp))
if (features & NETIF_F_GRO_HW)
flags |= BNXT_FLAG_GRO;
if (features & NETIF_F_LRO)
else if (features & NETIF_F_LRO)
flags |= BNXT_FLAG_LRO;

if (bp->flags & BNXT_FLAG_NO_AGG_RINGS)
Expand Down Expand Up @@ -7924,8 +7933,8 @@ static int bnxt_get_dflt_rings(struct bnxt *bp, int *max_rx, int *max_tx,
if (rc)
return rc;
bp->flags |= BNXT_FLAG_NO_AGG_RINGS;
bp->dev->hw_features &= ~NETIF_F_LRO;
bp->dev->features &= ~NETIF_F_LRO;
bp->dev->hw_features &= ~(NETIF_F_LRO | NETIF_F_GRO_HW);
bp->dev->features &= ~(NETIF_F_LRO | NETIF_F_GRO_HW);
bnxt_set_ring_params(bp);
}

Expand Down Expand Up @@ -8108,7 +8117,11 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->vlan_features = dev->hw_features | NETIF_F_HIGHDMA;
dev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_RX | NETIF_F_HW_VLAN_STAG_TX;
if (!BNXT_CHIP_TYPE_NITRO_A0(bp))
dev->hw_features |= NETIF_F_GRO_HW;
dev->features |= dev->hw_features | NETIF_F_HIGHDMA;
if (dev->features & NETIF_F_GRO_HW)
dev->features &= ~NETIF_F_LRO;
dev->priv_flags |= IFF_UNICAST_FLT;

#ifdef CONFIG_BNXT_SRIOV
Expand Down

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