diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/ptp.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/ptp.c | 126 |
1 files changed, 118 insertions, 8 deletions
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index 084e2d44790f..7aa070813960 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -255,6 +255,15 @@ struct efx_ptp_timeset { * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids * allocations in main data path). + * @good_syncs: Number of successful synchronisations. + * @fast_syncs: Number of synchronisations requiring short delay + * @bad_syncs: Number of failed synchronisations. + * @sync_timeouts: Number of synchronisation timeouts + * @no_time_syncs: Number of synchronisations with no good times. + * @invalid_sync_windows: Number of sync windows with bad durations. + * @undersize_sync_windows: Number of corrected sync windows that are too small + * @oversize_sync_windows: Number of corrected sync windows that are too large + * @rx_no_timestamp: Number of packets received without a timestamp. * @timeset: Last set of synchronisation statistics. */ struct efx_ptp_data { @@ -300,6 +309,16 @@ struct efx_ptp_data { struct workqueue_struct *pps_workwq; bool nic_ts_enabled; MCDI_DECLARE_BUF(txbuf, MC_CMD_PTP_IN_TRANSMIT_LENMAX); + + unsigned int good_syncs; + unsigned int fast_syncs; + unsigned int bad_syncs; + unsigned int sync_timeouts; + unsigned int no_time_syncs; + unsigned int invalid_sync_windows; + unsigned int undersize_sync_windows; + unsigned int oversize_sync_windows; + unsigned int rx_no_timestamp; struct efx_ptp_timeset timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM]; }; @@ -312,6 +331,78 @@ 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); +#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) \ + { #ext_name, 32, MC_CMD_PTP_OUT_STATUS_STATS_ ## mcdi_name ## _OFST } +static const struct efx_hw_stat_desc efx_ptp_stat_desc[] = { + PTP_SW_STAT(ptp_good_syncs, good_syncs), + PTP_SW_STAT(ptp_fast_syncs, fast_syncs), + PTP_SW_STAT(ptp_bad_syncs, bad_syncs), + PTP_SW_STAT(ptp_sync_timeouts, sync_timeouts), + PTP_SW_STAT(ptp_no_time_syncs, no_time_syncs), + PTP_SW_STAT(ptp_invalid_sync_windows, invalid_sync_windows), + PTP_SW_STAT(ptp_undersize_sync_windows, undersize_sync_windows), + PTP_SW_STAT(ptp_oversize_sync_windows, oversize_sync_windows), + PTP_SW_STAT(ptp_rx_no_timestamp, rx_no_timestamp), + PTP_MC_STAT(ptp_tx_timestamp_packets, TX), + PTP_MC_STAT(ptp_rx_timestamp_packets, RX), + PTP_MC_STAT(ptp_timestamp_packets, TS), + PTP_MC_STAT(ptp_filter_matches, FM), + PTP_MC_STAT(ptp_non_filter_matches, NFM), +}; +#define PTP_STAT_COUNT ARRAY_SIZE(efx_ptp_stat_desc) +static const unsigned long efx_ptp_stat_mask[] = { + [0 ... BITS_TO_LONGS(PTP_STAT_COUNT) - 1] = ~0UL, +}; + +size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings) +{ + if (!efx->ptp_data) + return 0; + + return efx_nic_describe_stats(efx_ptp_stat_desc, PTP_STAT_COUNT, + efx_ptp_stat_mask, strings); +} + +size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_STATUS_LEN); + MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_STATUS_LEN); + size_t i; + int rc; + + if (!efx->ptp_data) + return 0; + + /* Copy software statistics */ + for (i = 0; i < PTP_STAT_COUNT; i++) { + if (efx_ptp_stat_desc[i].dma_width) + continue; + stats[i] = *(unsigned int *)((char *)efx->ptp_data + + efx_ptp_stat_desc[i].offset); + } + + /* Fetch MC statistics. We *must* fill in all statistics or + * risk leaking kernel memory to userland, so if the MCDI + * request fails we pretend we got zeroes. + */ + MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_STATUS); + MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); + rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), NULL); + if (rc) { + netif_err(efx, hw, efx->net_dev, + "MC_CMD_PTP_OP_STATUS failed (%d)\n", rc); + memset(outbuf, 0, sizeof(outbuf)); + } + efx_nic_update_stats(efx_ptp_stat_desc, PTP_STAT_COUNT, + efx_ptp_stat_mask, + stats, _MCDI_PTR(outbuf, 0), false); + + return PTP_STAT_COUNT; +} + /* For Siena platforms NIC time is s and ns */ static void efx_ptp_ns_to_s_ns(s64 ns, u32 *nic_major, u32 *nic_minor) { @@ -633,7 +724,8 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), /* Read the set of results and find the last good host-MC * synchronization result. The MC times when it finishes reading the * host time so the corrected window time should be fairly constant - * for a given platform. + * for a given platform. Increment stats for any results that appear + * to be erroneous. */ for (i = 0; i < number_readings; i++) { s32 window, corrected; @@ -658,9 +750,13 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), * interrupt or other delay occurred between reading the system * time and writing it to MC memory. */ - if (window >= SYNCHRONISATION_GRANULARITY_NS && - corrected < MAX_SYNCHRONISATION_NS && - corrected >= ptp->min_synchronisation_ns) { + if (window < SYNCHRONISATION_GRANULARITY_NS) { + ++ptp->invalid_sync_windows; + } else if (corrected >= MAX_SYNCHRONISATION_NS) { + ++ptp->undersize_sync_windows; + } else if (corrected < ptp->min_synchronisation_ns) { + ++ptp->oversize_sync_windows; + } else { ngood++; last_good = i; } @@ -741,6 +837,11 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings) loops++; } + if (loops <= 1) + ++ptp->fast_syncs; + if (!time_before(jiffies, timeout)) + ++ptp->sync_timeouts; + if (ACCESS_ONCE(*start)) efx_ptp_send_times(efx, &last_time); @@ -749,9 +850,20 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings) MC_CMD_PTP_IN_SYNCHRONIZE_LEN, synch_buf, sizeof(synch_buf), &response_length); - if (rc == 0) + if (rc == 0) { rc = efx_ptp_process_times(efx, synch_buf, response_length, &last_time); + if (rc == 0) + ++ptp->good_syncs; + else + ++ptp->no_time_syncs; + } + + /* Increment the bad syncs counter if the synchronize fails, whatever + * the reason. + */ + if (rc != 0) + ++ptp->bad_syncs; return rc; } @@ -907,9 +1019,7 @@ static void efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) __skb_queue_tail(q, skb); } else if (time_after(jiffies, match->expiry)) { match->state = PTP_PACKET_STATE_TIMED_OUT; - if (net_ratelimit()) - netif_warn(efx, rx_err, efx->net_dev, - "PTP packet - no timestamp seen\n"); + ++ptp->rx_no_timestamp; __skb_queue_tail(q, skb); } else { /* Replace unprocessed entry and stop */ |