diff options
| author | Sunil Goutham <sgoutham@cavium.com> | 2018-01-15 15:44:57 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-16 22:31:14 +0300 |
| commit | 4a8755096466d1002236ac7293eae821b6de87ba (patch) | |
| tree | 8eaf366be7af579511c08ba91d1f991d155f7ec7 /drivers/net/ethernet/cavium/thunder/nicvf_queues.c | |
| parent | 8c56df372bc1371504bf3cc29fbb3c09967cafff (diff) | |
| download | linux-4a8755096466d1002236ac7293eae821b6de87ba.tar.xz | |
net: thunderx: add timestamping support
This adds timestamping support for both receive and transmit
paths. On the receive side no filters are supported i.e either
all pkts will get a timestamp appended infront of the packet or none.
On the transmit side HW doesn't support timestamp insertion but
only generates a separate CQE with transmitted packet's timestamp.
Also HW supports only one packet at a time for timestamping on the
transmit side.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@cavium.com>
Acked-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nicvf_queues.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c index 14e62c6ac342..3eae9ff9b53a 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c @@ -982,6 +982,9 @@ void nicvf_qset_config(struct nicvf *nic, bool enable) qs_cfg->be = 1; #endif qs_cfg->vnic = qs->vnic_id; + /* Enable Tx timestamping capability */ + if (nic->ptp_clock) + qs_cfg->send_tstmp_ena = 1; } nicvf_send_msg_to_pf(nic, &mbx); } @@ -1389,6 +1392,29 @@ nicvf_sq_add_hdr_subdesc(struct nicvf *nic, struct snd_queue *sq, int qentry, hdr->inner_l3_offset = skb_network_offset(skb) - 2; this_cpu_inc(nic->pnicvf->drv_stats->tx_tso); } + + /* Check if timestamp is requested */ + if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) { + skb_tx_timestamp(skb); + return; + } + + /* Tx timestamping not supported along with TSO, so ignore request */ + if (skb_shinfo(skb)->gso_size) + return; + + /* HW supports only a single outstanding packet to timestamp */ + if (!atomic_add_unless(&nic->pnicvf->tx_ptp_skbs, 1, 1)) + return; + + /* Mark the SKB for later reference */ + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + /* Finally enable timestamp generation + * Since 'post_cqe' is also set, two CQEs will be posted + * for this packet i.e CQE_TYPE_SEND and CQE_TYPE_SEND_PTP. + */ + hdr->tstmp = 1; } /* SQ GATHER subdescriptor |