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bnxt_en: Support IFF_SUPP_NOFCS feature to transmit without ethernet FCS.

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If firmware is capable, set the IFF_SUPP_NOFCS flag to support the
sockets option to transmit packets without FCS.  This is mainly used
for testing.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2021-04-25 13:45:26 -04:00 committed by David S. Miller
parent 7fbf359bb2
commit dade5e15fa
2 changed files with 14 additions and 3 deletions
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16
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -375,6 +375,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct pci_dev *pdev = bp->pdev;
struct bnxt_tx_ring_info *txr;
struct bnxt_sw_tx_bd *tx_buf;
__le32 lflags = 0;
i = skb_get_queue_mapping(skb);
if (unlikely(i >= bp->tx_nr_rings)) {
@ -416,6 +417,11 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
vlan_tag_flags |= 1 << TX_BD_CFA_META_TPID_SHIFT;
}
if (unlikely(skb->no_fcs)) {
lflags |= cpu_to_le32(TX_BD_FLAGS_NO_CRC);
goto normal_tx;
}
if (free_size == bp->tx_ring_size && length <= bp->tx_push_thresh) {
struct tx_push_buffer *tx_push_buf = txr->tx_push;
struct tx_push_bd *tx_push = &tx_push_buf->push_bd;
@ -517,7 +523,7 @@ normal_tx:
txbd1 = (struct tx_bd_ext *)
&txr->tx_desc_ring[TX_RING(prod)][TX_IDX(prod)];
txbd1->tx_bd_hsize_lflags = 0;
txbd1->tx_bd_hsize_lflags = lflags;
if (skb_is_gso(skb)) {
u32 hdr_len;
@ -529,14 +535,14 @@ normal_tx:
hdr_len = skb_transport_offset(skb) +
tcp_hdrlen(skb);
txbd1->tx_bd_hsize_lflags = cpu_to_le32(TX_BD_FLAGS_LSO |
txbd1->tx_bd_hsize_lflags |= cpu_to_le32(TX_BD_FLAGS_LSO |
TX_BD_FLAGS_T_IPID |
(hdr_len << (TX_BD_HSIZE_SHIFT - 1)));
length = skb_shinfo(skb)->gso_size;
txbd1->tx_bd_mss = cpu_to_le32(length);
length += hdr_len;
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
txbd1->tx_bd_hsize_lflags =
txbd1->tx_bd_hsize_lflags |=
cpu_to_le32(TX_BD_FLAGS_TCP_UDP_CHKSUM);
txbd1->tx_bd_mss = 0;
}
@ -12460,6 +12466,10 @@ static int bnxt_probe_phy(struct bnxt *bp, bool fw_dflt)
rc);
return rc;
}
if (bp->phy_flags & BNXT_PHY_FL_NO_FCS)
bp->dev->priv_flags |= IFF_SUPP_NOFCS;
else
bp->dev->priv_flags &= ~IFF_SUPP_NOFCS;
if (!fw_dflt)
return 0;

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -2015,6 +2015,7 @@ struct bnxt {
#define BNXT_PHY_FL_PORT_STATS_NO_RESET PORT_PHY_QCAPS_RESP_FLAGS_CUMULATIVE_COUNTERS_ON_RESET
#define BNXT_PHY_FL_NO_PHY_LPBK PORT_PHY_QCAPS_RESP_FLAGS_LOCAL_LPBK_NOT_SUPPORTED
#define BNXT_PHY_FL_FW_MANAGED_LKDN PORT_PHY_QCAPS_RESP_FLAGS_FW_MANAGED_LINK_DOWN
#define BNXT_PHY_FL_NO_FCS PORT_PHY_QCAPS_RESP_FLAGS_NO_FCS
u8 num_tests;
struct bnxt_test_info *test_info;