diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 965d1c939f0f..63b62d74f961 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -5,6 +5,11 @@ #include <linux/types.h> #include <linux/if_vlan.h> #include <linux/aer.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#include <linux/ip.h> + +#include <net/ipv6.h> #include "igc.h" #include "igc_hw.h" @@ -790,8 +795,96 @@ static int igc_set_mac(struct net_device *netdev, void *p) return 0; } +static void igc_tx_ctxtdesc(struct igc_ring *tx_ring, + struct igc_tx_buffer *first, + u32 vlan_macip_lens, u32 type_tucmd, + u32 mss_l4len_idx) +{ + struct igc_adv_tx_context_desc *context_desc; + u16 i = tx_ring->next_to_use; + struct timespec64 ts; + + context_desc = IGC_TX_CTXTDESC(tx_ring, i); + + i++; + tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; + + /* set bits to identify this as an advanced context descriptor */ + type_tucmd |= IGC_TXD_CMD_DEXT | IGC_ADVTXD_DTYP_CTXT; + + /* For 82575, context index must be unique per ring. */ + if (test_bit(IGC_RING_FLAG_TX_CTX_IDX, &tx_ring->flags)) + mss_l4len_idx |= tx_ring->reg_idx << 4; + + context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); + context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); + context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); + + /* We assume there is always a valid Tx time available. Invalid times + * should have been handled by the upper layers. + */ + if (tx_ring->launchtime_enable) { + ts = ns_to_timespec64(first->skb->tstamp); + first->skb->tstamp = 0; + context_desc->launch_time = cpu_to_le32(ts.tv_nsec / 32); + } else { + context_desc->launch_time = 0; + } +} + +static inline bool igc_ipv6_csum_is_sctp(struct sk_buff *skb) +{ + unsigned int offset = 0; + + ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL); + + return offset == skb_checksum_start_offset(skb); +} + static void igc_tx_csum(struct igc_ring *tx_ring, struct igc_tx_buffer *first) { + struct sk_buff *skb = first->skb; + u32 vlan_macip_lens = 0; + u32 type_tucmd = 0; + + if (skb->ip_summed != CHECKSUM_PARTIAL) { +csum_failed: + if (!(first->tx_flags & IGC_TX_FLAGS_VLAN) && + !tx_ring->launchtime_enable) + return; + goto no_csum; + } + + switch (skb->csum_offset) { + case offsetof(struct tcphdr, check): + type_tucmd = IGC_ADVTXD_TUCMD_L4T_TCP; + /* fall through */ + case offsetof(struct udphdr, check): + break; + case offsetof(struct sctphdr, checksum): + /* validate that this is actually an SCTP request */ + if ((first->protocol == htons(ETH_P_IP) && + (ip_hdr(skb)->protocol == IPPROTO_SCTP)) || + (first->protocol == htons(ETH_P_IPV6) && + igc_ipv6_csum_is_sctp(skb))) { + type_tucmd = IGC_ADVTXD_TUCMD_L4T_SCTP; + break; + } + /* fall through */ + default: + skb_checksum_help(skb); + goto csum_failed; + } + + /* update TX checksum flag */ + first->tx_flags |= IGC_TX_FLAGS_CSUM; + vlan_macip_lens = skb_checksum_start_offset(skb) - + skb_network_offset(skb); +no_csum: + vlan_macip_lens |= skb_network_offset(skb) << IGC_ADVTXD_MACLEN_SHIFT; + vlan_macip_lens |= first->tx_flags & IGC_TX_FLAGS_VLAN_MASK; + + igc_tx_ctxtdesc(tx_ring, first, vlan_macip_lens, type_tucmd, 0); } static int __igc_maybe_stop_tx(struct igc_ring *tx_ring, const u16 size) @@ -4116,6 +4209,9 @@ static int igc_probe(struct pci_dev *pdev, if (err) goto err_sw_init; + /* Add supported features to the features list*/ + netdev->features |= NETIF_F_HW_CSUM; + /* setup the private structure */ err = igc_sw_init(adapter); if (err) @@ -4123,6 +4219,7 @@ static int igc_probe(struct pci_dev *pdev, /* copy netdev features into list of user selectable features */ netdev->hw_features |= NETIF_F_NTUPLE; + netdev->hw_features |= netdev->features; /* MTU range: 68 - 9216 */ netdev->min_mtu = ETH_MIN_MTU; |