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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 <mhabets@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin Habets 2018-01-25 17:24:56 +00:00 committed by David S. Miller
parent b9b603d46d
commit 9c3afb33ae
2 changed files with 11 additions and 0 deletions
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1
drivers/net/ethernet/sfc/nic.h
View File

@ -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;

10
drivers/net/ethernet/sfc/ptp.c
View File

@ -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) \