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sfc: support separate PTP and general timestamping 

Support MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2.  Extract general
 timestamp corrections in addition to PTP corrections.  Apply receive
 timestamp corrections for general datapath receive timestamping, and
 correspondingly for transmit.

Signed-off-by: Laurence Evans <levans@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Laurence Evans 2018-01-25 17:27:22 +00:00 committed by David S. Miller
parent c4f64fcc4d
commit 04796f4c4d
1 changed files with 43 additions and 15 deletions
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58
drivers/net/ethernet/sfc/ptp.c
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@ -237,10 +237,17 @@ struct efx_ptp_timeset {
* @ns_to_nic_time: Function to convert from scalar nanoseconds to NIC time
* @nic_to_kernel_time: Function to convert from NIC to kernel time
* @min_synchronisation_ns: Minimum acceptable corrected sync window
* @ts_corrections.tx: Required driver correction of transmit timestamps
* @ts_corrections.rx: Required driver correction of receive timestamps
* @capabilities: Capabilities flags from the NIC
* @ts_corrections.ptp_tx: Required driver correction of PTP packet transmit
* timestamps
* @ts_corrections.ptp_rx: Required driver correction of PTP packet receive
* timestamps
* @ts_corrections.pps_out: PPS output error (information only)
* @ts_corrections.pps_in: Required driver correction of PPS input timestamps
* @ts_corrections.general_tx: Required driver correction of general packet
* transmit timestamps
* @ts_corrections.general_rx: Required driver correction of general packet
* receive timestamps
* @evt_frags: Partly assembled PTP events
* @evt_frag_idx: Current fragment number
* @evt_code: Last event code
@ -291,10 +298,12 @@ struct efx_ptp_data {
s32 correction);
unsigned int min_synchronisation_ns;
struct {
s32 tx;
s32 rx;
s32 ptp_tx;
s32 ptp_rx;
s32 pps_out;
s32 pps_in;
s32 general_tx;
s32 general_rx;
} ts_corrections;
efx_qword_t evt_frags[MAX_EVENT_FRAGS];
int evt_frag_idx;
@ -537,11 +546,13 @@ ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue)
if (efx_ptp_use_mac_tx_timestamps(efx))
kt = efx_ptp_mac_s27_to_ktime_correction(efx,
tx_queue->completed_timestamp_major,
tx_queue->completed_timestamp_minor, 0);
tx_queue->completed_timestamp_minor,
ptp->ts_corrections.general_tx);
else
kt = ptp->nic_to_kernel_time(
tx_queue->completed_timestamp_major,
tx_queue->completed_timestamp_minor, 0);
tx_queue->completed_timestamp_minor,
ptp->ts_corrections.general_tx);
return kt;
}
@ -606,8 +617,9 @@ static int efx_ptp_get_attributes(struct efx_nic *efx)
static int efx_ptp_get_timestamp_corrections(struct efx_nic *efx)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_TIMESTAMP_CORRECTIONS_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN);
int rc;
size_t out_len;
/* Get the timestamp corrections from the NIC. If this operation is
* not supported (older NICs) then no correction is required.
@ -617,21 +629,37 @@ static int efx_ptp_get_timestamp_corrections(struct efx_nic *efx)
MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), NULL);
outbuf, sizeof(outbuf), &out_len);
if (rc == 0) {
efx->ptp_data->ts_corrections.tx = MCDI_DWORD(outbuf,
efx->ptp_data->ts_corrections.ptp_tx = MCDI_DWORD(outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_TRANSMIT);
efx->ptp_data->ts_corrections.rx = MCDI_DWORD(outbuf,
efx->ptp_data->ts_corrections.ptp_rx = MCDI_DWORD(outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_RECEIVE);
efx->ptp_data->ts_corrections.pps_out = MCDI_DWORD(outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_OUT);
efx->ptp_data->ts_corrections.pps_in = MCDI_DWORD(outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_IN);
if (out_len >= MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN) {
efx->ptp_data->ts_corrections.general_tx = MCDI_DWORD(
outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_TX);
efx->ptp_data->ts_corrections.general_rx = MCDI_DWORD(
outbuf,
PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_RX);
} else {
efx->ptp_data->ts_corrections.general_tx =
efx->ptp_data->ts_corrections.ptp_tx;
efx->ptp_data->ts_corrections.general_rx =
efx->ptp_data->ts_corrections.ptp_rx;
}
} else if (rc == -EINVAL) {
efx->ptp_data->ts_corrections.tx = 0;
efx->ptp_data->ts_corrections.rx = 0;
efx->ptp_data->ts_corrections.ptp_tx = 0;
efx->ptp_data->ts_corrections.ptp_rx = 0;
efx->ptp_data->ts_corrections.pps_out = 0;
efx->ptp_data->ts_corrections.pps_in = 0;
efx->ptp_data->ts_corrections.general_tx = 0;
efx->ptp_data->ts_corrections.general_rx = 0;
} else {
efx_mcdi_display_error(efx, MC_CMD_PTP, sizeof(inbuf), outbuf,
sizeof(outbuf), rc);
@ -998,7 +1026,7 @@ static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
timestamps.hwtstamp = ptp_data->nic_to_kernel_time(
MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MAJOR),
MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MINOR),
ptp_data->ts_corrections.tx);
ptp_data->ts_corrections.ptp_tx);
skb_tstamp_tx(skb, &timestamps);
@ -1745,7 +1773,7 @@ static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp)
evt->hwtimestamp = efx->ptp_data->nic_to_kernel_time(
EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA),
EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA),
ptp->ts_corrections.rx);
ptp->ts_corrections.ptp_rx);
evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
list_add_tail(&evt->link, &ptp->evt_list);
@ -1908,7 +1936,7 @@ void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
timestamps->hwtstamp = efx_ptp_s27_to_ktime_correction(
pkt_timestamp_major,
pkt_timestamp_minor,
efx->ptp_data->ts_corrections.rx);
efx->ptp_data->ts_corrections.general_rx);
}
static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)