From 9c3afb33ae587723d2acda044a352670ec8d5b82 Mon Sep 17 00:00:00 2001 From: Martin Habets Date: Thu, 25 Jan 2018 17:24:56 +0000 Subject: sfc: add function to determine which TX timestamping method to use Use MC capability MC_CMD_GET_CAPABILITIES_V2_OUT_TX_MAC_TIMESTAMPING to detect whether the NIC supports timestamping packets sent out the main datapath. Signed-off-by: Martin Habets Signed-off-by: Edward Cree Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/nic.h | 1 + drivers/net/ethernet/sfc/ptp.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h index 54bfbba..43a3fa1 100644 --- a/drivers/net/ethernet/sfc/nic.h +++ b/drivers/net/ethernet/sfc/nic.h @@ -471,6 +471,7 @@ static inline void efx_rx_skb_attach_timestamp(struct efx_channel *channel, } void efx_ptp_start_datapath(struct efx_nic *efx); void efx_ptp_stop_datapath(struct efx_nic *efx); +bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx); ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue); extern const struct efx_nic_type falcon_a1_nic_type; diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index 976d38b..096b2f7 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -329,6 +329,16 @@ static int efx_phc_settime(struct ptp_clock_info *ptp, static int efx_phc_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *request, int on); +bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx) +{ + struct efx_ef10_nic_data *nic_data = efx->nic_data; + + return ((efx_nic_rev(efx) >= EFX_REV_HUNT_A0) && + (nic_data->datapath_caps2 & + (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_MAC_TIMESTAMPING_LBN) + )); +} + #define PTP_SW_STAT(ext_name, field_name) \ { #ext_name, 0, offsetof(struct efx_ptp_data, field_name) } #define PTP_MC_STAT(ext_name, mcdi_name) \ -- cgit v1.1