diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/ptp.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/ptp.c | 854 |
1 files changed, 630 insertions, 224 deletions
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index 3dd39dcfe36b..eb75fbd11a01 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -62,7 +62,7 @@ #define SYNCHRONISATION_GRANULARITY_NS 200 /* Minimum permitted length of a (corrected) synchronisation time */ -#define MIN_SYNCHRONISATION_NS 120 +#define DEFAULT_MIN_SYNCHRONISATION_NS 120 /* Maximum permitted length of a (corrected) synchronisation time */ #define MAX_SYNCHRONISATION_NS 1000 @@ -195,26 +195,29 @@ struct efx_ptp_event_rx { /** * struct efx_ptp_timeset - Synchronisation between host and MC * @host_start: Host time immediately before hardware timestamp taken - * @seconds: Hardware timestamp, seconds - * @nanoseconds: Hardware timestamp, nanoseconds + * @major: Hardware timestamp, major + * @minor: Hardware timestamp, minor * @host_end: Host time immediately after hardware timestamp taken - * @waitns: Number of nanoseconds between hardware timestamp being read and + * @wait: Number of NIC clock ticks between hardware timestamp being read and * host end time being seen * @window: Difference of host_end and host_start * @valid: Whether this timeset is valid */ struct efx_ptp_timeset { u32 host_start; - u32 seconds; - u32 nanoseconds; + u32 major; + u32 minor; u32 host_end; - u32 waitns; + u32 wait; u32 window; /* Derived: end - start, allowing for wrap */ }; /** * struct efx_ptp_data - Precision Time Protocol (PTP) state - * @channel: The PTP channel + * @efx: The NIC context + * @channel: The PTP channel (Siena only) + * @rx_ts_inline: Flag for whether RX timestamps are inline (else they are + * separate events) * @rxq: Receive queue (awaiting timestamps) * @txq: Transmit queue * @evt_list: List of MC receive events awaiting packets @@ -231,41 +234,42 @@ struct efx_ptp_timeset { * @config: Current timestamp configuration * @enabled: PTP operation enabled * @mode: Mode in which PTP operating (PTP version) + * @time_format: Time format supported by this NIC + * @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 + * @ts_corrections.pps_out: PPS output error (information only) + * @ts_corrections.pps_in: Required driver correction of PPS input timestamps * @evt_frags: Partly assembled PTP events * @evt_frag_idx: Current fragment number * @evt_code: Last event code * @start: Address at which MC indicates ready for synchronisation * @host_time_pps: Host time at last PPS - * @last_sync_ns: Last number of nanoseconds between readings when synchronising - * @base_sync_ns: Number of nanoseconds for last synchronisation. - * @base_sync_valid: Whether base_sync_time is valid. * @current_adjfreq: Current ppb adjustment. - * @phc_clock: Pointer to registered phc device + * @phc_clock: Pointer to registered phc device (if primary function) * @phc_clock_info: Registration structure for phc device * @pps_work: pps work task for handling pps events * @pps_workwq: pps work queue * @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). - * @debug_ptp_dir: PTP debugfs directory - * @missed_rx_sync: Number of packets received without syncrhonisation. * @good_syncs: Number of successful synchronisations. - * @no_time_syncs: Number of synchronisations with no good times. - * @bad_sync_durations: Number of synchronisations with bad durations. + * @fast_syncs: Number of synchronisations requiring short delay * @bad_syncs: Number of failed synchronisations. - * @last_sync_time: Number of nanoseconds for last synchronisation. * @sync_timeouts: Number of synchronisation timeouts - * @fast_syncs: Number of synchronisations requiring short delay - * @min_sync_delta: Minimum time between event and synchronisation - * @max_sync_delta: Maximum time between event and synchronisation - * @average_sync_delta: Average time between event and synchronisation. - * Modified moving average. - * @last_sync_delta: Last time between event and synchronisation - * @mc_stats: Context value for MC statistics + * @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 { + struct efx_nic *efx; struct efx_channel *channel; + bool rx_ts_inline; struct sk_buff_head rxq; struct sk_buff_head txq; struct list_head evt_list; @@ -282,14 +286,22 @@ struct efx_ptp_data { struct hwtstamp_config config; bool enabled; unsigned int mode; + unsigned int time_format; + void (*ns_to_nic_time)(s64 ns, u32 *nic_major, u32 *nic_minor); + ktime_t (*nic_to_kernel_time)(u32 nic_major, u32 nic_minor, + s32 correction); + unsigned int min_synchronisation_ns; + struct { + s32 tx; + s32 rx; + s32 pps_out; + s32 pps_in; + } ts_corrections; efx_qword_t evt_frags[MAX_EVENT_FRAGS]; int evt_frag_idx; int evt_code; struct efx_buffer start; struct pps_event_time host_time_pps; - unsigned last_sync_ns; - unsigned base_sync_ns; - bool base_sync_valid; s64 current_adjfreq; struct ptp_clock *phc_clock; struct ptp_clock_info phc_clock_info; @@ -297,6 +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]; }; @@ -309,19 +331,263 @@ 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) +{ + struct timespec ts = ns_to_timespec(ns); + *nic_major = ts.tv_sec; + *nic_minor = ts.tv_nsec; +} + +static ktime_t efx_ptp_s_ns_to_ktime_correction(u32 nic_major, u32 nic_minor, + s32 correction) +{ + ktime_t kt = ktime_set(nic_major, nic_minor); + if (correction >= 0) + kt = ktime_add_ns(kt, (u64)correction); + else + kt = ktime_sub_ns(kt, (u64)-correction); + return kt; +} + +/* To convert from s27 format to ns we multiply then divide by a power of 2. + * For the conversion from ns to s27, the operation is also converted to a + * multiply and shift. + */ +#define S27_TO_NS_SHIFT (27) +#define NS_TO_S27_MULT (((1ULL << 63) + NSEC_PER_SEC / 2) / NSEC_PER_SEC) +#define NS_TO_S27_SHIFT (63 - S27_TO_NS_SHIFT) +#define S27_MINOR_MAX (1 << S27_TO_NS_SHIFT) + +/* For Huntington platforms NIC time is in seconds and fractions of a second + * where the minor register only uses 27 bits in units of 2^-27s. + */ +static void efx_ptp_ns_to_s27(s64 ns, u32 *nic_major, u32 *nic_minor) +{ + struct timespec ts = ns_to_timespec(ns); + u32 maj = ts.tv_sec; + u32 min = (u32)(((u64)ts.tv_nsec * NS_TO_S27_MULT + + (1ULL << (NS_TO_S27_SHIFT - 1))) >> NS_TO_S27_SHIFT); + + /* The conversion can result in the minor value exceeding the maximum. + * In this case, round up to the next second. + */ + if (min >= S27_MINOR_MAX) { + min -= S27_MINOR_MAX; + maj++; + } + + *nic_major = maj; + *nic_minor = min; +} + +static inline ktime_t efx_ptp_s27_to_ktime(u32 nic_major, u32 nic_minor) +{ + u32 ns = (u32)(((u64)nic_minor * NSEC_PER_SEC + + (1ULL << (S27_TO_NS_SHIFT - 1))) >> S27_TO_NS_SHIFT); + return ktime_set(nic_major, ns); +} + +static ktime_t efx_ptp_s27_to_ktime_correction(u32 nic_major, u32 nic_minor, + s32 correction) +{ + /* Apply the correction and deal with carry */ + nic_minor += correction; + if ((s32)nic_minor < 0) { + nic_minor += S27_MINOR_MAX; + nic_major--; + } else if (nic_minor >= S27_MINOR_MAX) { + nic_minor -= S27_MINOR_MAX; + nic_major++; + } + + return efx_ptp_s27_to_ktime(nic_major, nic_minor); +} + +/* Get PTP attributes and set up time conversions */ +static int efx_ptp_get_attributes(struct efx_nic *efx) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_ATTRIBUTES_LEN); + MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN); + struct efx_ptp_data *ptp = efx->ptp_data; + int rc; + u32 fmt; + size_t out_len; + + /* Get the PTP attributes. If the NIC doesn't support the operation we + * use the default format for compatibility with older NICs i.e. + * seconds and nanoseconds. + */ + MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_GET_ATTRIBUTES); + MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); + rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &out_len); + if (rc == 0) + fmt = MCDI_DWORD(outbuf, PTP_OUT_GET_ATTRIBUTES_TIME_FORMAT); + else if (rc == -EINVAL) + fmt = MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS; + else + return rc; + + if (fmt == MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_27FRACTION) { + ptp->ns_to_nic_time = efx_ptp_ns_to_s27; + ptp->nic_to_kernel_time = efx_ptp_s27_to_ktime_correction; + } else if (fmt == MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS) { + ptp->ns_to_nic_time = efx_ptp_ns_to_s_ns; + ptp->nic_to_kernel_time = efx_ptp_s_ns_to_ktime_correction; + } else { + return -ERANGE; + } + + ptp->time_format = fmt; + + /* MC_CMD_PTP_OP_GET_ATTRIBUTES is an extended version of an older + * operation MC_CMD_PTP_OP_GET_TIME_FORMAT that also returns a value + * to use for the minimum acceptable corrected synchronization window. + * If we have the extra information store it. For older firmware that + * does not implement the extended command use the default value. + */ + if (rc == 0 && out_len >= MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN) + ptp->min_synchronisation_ns = + MCDI_DWORD(outbuf, + PTP_OUT_GET_ATTRIBUTES_SYNC_WINDOW_MIN); + else + ptp->min_synchronisation_ns = DEFAULT_MIN_SYNCHRONISATION_NS; + + return 0; +} + +/* Get PTP timestamp corrections */ +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); + int rc; + + /* Get the timestamp corrections from the NIC. If this operation is + * not supported (older NICs) then no correction is required. + */ + MCDI_SET_DWORD(inbuf, PTP_IN_OP, + MC_CMD_PTP_OP_GET_TIMESTAMP_CORRECTIONS); + 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 == 0) { + efx->ptp_data->ts_corrections.tx = MCDI_DWORD(outbuf, + PTP_OUT_GET_TIMESTAMP_CORRECTIONS_TRANSMIT); + efx->ptp_data->ts_corrections.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); + } else if (rc == -EINVAL) { + efx->ptp_data->ts_corrections.tx = 0; + efx->ptp_data->ts_corrections.rx = 0; + efx->ptp_data->ts_corrections.pps_out = 0; + efx->ptp_data->ts_corrections.pps_in = 0; + } else { + return rc; + } + + return 0; +} + /* Enable MCDI PTP support. */ static int efx_ptp_enable(struct efx_nic *efx) { MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ENABLE_LEN); + MCDI_DECLARE_BUF_OUT_OR_ERR(outbuf, 0); + int rc; MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE); MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE, - efx->ptp_data->channel->channel); + efx->ptp_data->channel ? + efx->ptp_data->channel->channel : 0); MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode); - return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), - NULL, 0, NULL); + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), NULL); + rc = (rc == -EALREADY) ? 0 : rc; + if (rc) + efx_mcdi_display_error(efx, MC_CMD_PTP, + MC_CMD_PTP_IN_ENABLE_LEN, + outbuf, sizeof(outbuf), rc); + return rc; } /* Disable MCDI PTP support. @@ -332,11 +598,19 @@ static int efx_ptp_enable(struct efx_nic *efx) static int efx_ptp_disable(struct efx_nic *efx) { MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_DISABLE_LEN); + MCDI_DECLARE_BUF_OUT_OR_ERR(outbuf, 0); + int rc; MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE); MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); - return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), - NULL, 0, NULL); + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), NULL); + rc = (rc == -EALREADY) ? 0 : rc; + if (rc) + efx_mcdi_display_error(efx, MC_CMD_PTP, + MC_CMD_PTP_IN_DISABLE_LEN, + outbuf, sizeof(outbuf), rc); + return rc; } static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q) @@ -404,11 +678,10 @@ static void efx_ptp_read_timeset(MCDI_DECLARE_STRUCT_PTR(data), unsigned start_ns, end_ns; timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART); - timeset->seconds = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_SECONDS); - timeset->nanoseconds = MCDI_DWORD(data, - PTP_OUT_SYNCHRONIZE_NANOSECONDS); + timeset->major = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MAJOR); + timeset->minor = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MINOR); timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND), - timeset->waitns = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS); + timeset->wait = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS); /* Ignore seconds */ start_ns = timeset->host_start & MC_NANOSECOND_MASK; @@ -437,62 +710,73 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), MCDI_VAR_ARRAY_LEN(response_length, PTP_OUT_SYNCHRONIZE_TIMESET); unsigned i; - unsigned total; unsigned ngood = 0; unsigned last_good = 0; struct efx_ptp_data *ptp = efx->ptp_data; u32 last_sec; u32 start_sec; struct timespec delta; + ktime_t mc_time; if (number_readings == 0) return -EAGAIN; - /* Read the set of results and increment stats for any results that - * appera to be erroneous. + /* 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. Increment stats for any results that appear + * to be erroneous. */ for (i = 0; i < number_readings; i++) { + s32 window, corrected; + struct timespec wait; + efx_ptp_read_timeset( MCDI_ARRAY_STRUCT_PTR(synch_buf, PTP_OUT_SYNCHRONIZE_TIMESET, i), &ptp->timeset[i]); - } - /* 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. - */ - total = 0; - for (i = 0; i < number_readings; i++) - if (ptp->timeset[i].window > ptp->timeset[i].waitns) { - unsigned win; - - win = ptp->timeset[i].window - ptp->timeset[i].waitns; - if (win >= MIN_SYNCHRONISATION_NS && - win < MAX_SYNCHRONISATION_NS) { - total += ptp->timeset[i].window; - ngood++; - last_good = i; - } + wait = ktime_to_timespec( + ptp->nic_to_kernel_time(0, ptp->timeset[i].wait, 0)); + window = ptp->timeset[i].window; + corrected = window - wait.tv_nsec; + + /* We expect the uncorrected synchronization window to be at + * least as large as the interval between host start and end + * times. If it is smaller than this then this is mostly likely + * to be a consequence of the host's time being adjusted. + * Check that the corrected sync window is in a reasonable + * range. If it is out of range it is likely to be because an + * interrupt or other delay occurred between reading the system + * time and writing it to MC memory. + */ + if (window < SYNCHRONISATION_GRANULARITY_NS) { + ++ptp->invalid_sync_windows; + } else if (corrected >= MAX_SYNCHRONISATION_NS) { + ++ptp->oversize_sync_windows; + } else if (corrected < ptp->min_synchronisation_ns) { + ++ptp->undersize_sync_windows; + } else { + ngood++; + last_good = i; } + } if (ngood == 0) { netif_warn(efx, drv, efx->net_dev, - "PTP no suitable synchronisations %dns\n", - ptp->base_sync_ns); + "PTP no suitable synchronisations\n"); return -EAGAIN; } - /* Average minimum this synchronisation */ - ptp->last_sync_ns = DIV_ROUND_UP(total, ngood); - if (!ptp->base_sync_valid || (ptp->last_sync_ns < ptp->base_sync_ns)) { - ptp->base_sync_valid = true; - ptp->base_sync_ns = ptp->last_sync_ns; - } + /* Convert the NIC time into kernel time. No correction is required- + * this time is the output of a firmware process. + */ + mc_time = ptp->nic_to_kernel_time(ptp->timeset[last_good].major, + ptp->timeset[last_good].minor, 0); /* Calculate delay from actual PPS to last_time */ - delta.tv_nsec = - ptp->timeset[last_good].nanoseconds + + delta = ktime_to_timespec(mc_time); + delta.tv_nsec += last_time->ts_real.tv_nsec - (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK); @@ -553,6 +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); @@ -561,9 +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; } @@ -602,9 +902,10 @@ static int efx_ptp_xmit_skb(struct efx_nic *efx, struct sk_buff *skb) goto fail; memset(×tamps, 0, sizeof(timestamps)); - timestamps.hwtstamp = ktime_set( - MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_SECONDS), - MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_NANOSECONDS)); + 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); skb_tstamp_tx(skb, ×tamps); @@ -622,6 +923,9 @@ static void efx_ptp_drop_time_expired_events(struct efx_nic *efx) struct list_head *cursor; struct list_head *next; + if (ptp->rx_ts_inline) + return; + /* Drop time-expired events */ spin_lock_bh(&ptp->evt_lock); if (!list_empty(&ptp->evt_list)) { @@ -655,6 +959,8 @@ static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx, struct efx_ptp_match *match; enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED; + WARN_ON_ONCE(ptp->rx_ts_inline); + spin_lock_bh(&ptp->evt_lock); evts_waiting = !list_empty(&ptp->evt_list); spin_unlock_bh(&ptp->evt_lock); @@ -696,13 +1002,10 @@ static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx, /* Process any queued receive events and corresponding packets * * q is returned with all the packets that are ready for delivery. - * true is returned if at least one of those packets requires - * synchronisation. */ -static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) +static void efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) { struct efx_ptp_data *ptp = efx->ptp_data; - bool rc = false; struct sk_buff *skb; while ((skb = skb_dequeue(&ptp->rxq))) { @@ -713,13 +1016,10 @@ static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) __skb_queue_tail(q, skb); } else if (efx_ptp_match_rx(efx, skb) == PTP_PACKET_STATE_MATCHED) { - rc = true; __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 */ @@ -727,8 +1027,6 @@ static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) break; } } - - return rc; } /* Complete processing of a received packet */ @@ -739,13 +1037,27 @@ static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb) local_bh_enable(); } -static int efx_ptp_start(struct efx_nic *efx) +static void efx_ptp_remove_multicast_filters(struct efx_nic *efx) +{ + struct efx_ptp_data *ptp = efx->ptp_data; + + if (ptp->rxfilter_installed) { + efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, + ptp->rxfilter_general); + efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, + ptp->rxfilter_event); + ptp->rxfilter_installed = false; + } +} + +static int efx_ptp_insert_multicast_filters(struct efx_nic *efx) { struct efx_ptp_data *ptp = efx->ptp_data; struct efx_filter_spec rxfilter; int rc; - ptp->reset_required = false; + if (!ptp->channel || ptp->rxfilter_installed) + return 0; /* Must filter on both event and general ports to ensure * that there is no packet re-ordering. @@ -778,23 +1090,37 @@ static int efx_ptp_start(struct efx_nic *efx) goto fail; ptp->rxfilter_general = rc; + ptp->rxfilter_installed = true; + return 0; + +fail: + efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, + ptp->rxfilter_event); + return rc; +} + +static int efx_ptp_start(struct efx_nic *efx) +{ + struct efx_ptp_data *ptp = efx->ptp_data; + int rc; + + ptp->reset_required = false; + + rc = efx_ptp_insert_multicast_filters(efx); + if (rc) + return rc; + rc = efx_ptp_enable(efx); if (rc != 0) - goto fail2; + goto fail; ptp->evt_frag_idx = 0; ptp->current_adjfreq = 0; - ptp->rxfilter_installed = true; return 0; -fail2: - efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, - ptp->rxfilter_general); fail: - efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, - ptp->rxfilter_event); - + efx_ptp_remove_multicast_filters(efx); return rc; } @@ -810,13 +1136,7 @@ static int efx_ptp_stop(struct efx_nic *efx) rc = efx_ptp_disable(efx); - if (ptp->rxfilter_installed) { - efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, - ptp->rxfilter_general); - efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, - ptp->rxfilter_event); - ptp->rxfilter_installed = false; - } + efx_ptp_remove_multicast_filters(efx); /* Make sure RX packets are really delivered */ efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq); @@ -844,7 +1164,7 @@ static void efx_ptp_pps_worker(struct work_struct *work) { struct efx_ptp_data *ptp = container_of(work, struct efx_ptp_data, pps_work); - struct efx_nic *efx = ptp->channel->efx; + struct efx_nic *efx = ptp->efx; struct ptp_clock_event ptp_evt; if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS)) @@ -855,13 +1175,11 @@ static void efx_ptp_pps_worker(struct work_struct *work) ptp_clock_event(ptp->phc_clock, &ptp_evt); } -/* Process any pending transmissions and timestamp any received packets. - */ static void efx_ptp_worker(struct work_struct *work) { struct efx_ptp_data *ptp_data = container_of(work, struct efx_ptp_data, work); - struct efx_nic *efx = ptp_data->channel->efx; + struct efx_nic *efx = ptp_data->efx; struct sk_buff *skb; struct sk_buff_head tempq; @@ -874,42 +1192,50 @@ static void efx_ptp_worker(struct work_struct *work) efx_ptp_drop_time_expired_events(efx); __skb_queue_head_init(&tempq); - if (efx_ptp_process_events(efx, &tempq) || - !skb_queue_empty(&ptp_data->txq)) { + efx_ptp_process_events(efx, &tempq); - while ((skb = skb_dequeue(&ptp_data->txq))) - efx_ptp_xmit_skb(efx, skb); - } + while ((skb = skb_dequeue(&ptp_data->txq))) + efx_ptp_xmit_skb(efx, skb); while ((skb = __skb_dequeue(&tempq))) efx_ptp_process_rx(efx, skb); } -/* Initialise PTP channel and state. - * - * Setting core_index to zero causes the queue to be initialised and doesn't - * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue. - */ -static int efx_ptp_probe_channel(struct efx_channel *channel) +static const struct ptp_clock_info efx_phc_clock_info = { + .owner = THIS_MODULE, + .name = "sfc", + .max_adj = MAX_PPB, + .n_alarm = 0, + .n_ext_ts = 0, + .n_per_out = 0, + .pps = 1, + .adjfreq = efx_phc_adjfreq, + .adjtime = efx_phc_adjtime, + .gettime = efx_phc_gettime, + .settime = efx_phc_settime, + .enable = efx_phc_enable, +}; + +/* Initialise PTP state. */ +int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel) { - struct efx_nic *efx = channel->efx; struct efx_ptp_data *ptp; int rc = 0; unsigned int pos; - channel->irq_moderation = 0; - channel->rx_queue.core_index = 0; - ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL); efx->ptp_data = ptp; if (!efx->ptp_data) return -ENOMEM; + ptp->efx = efx; + ptp->channel = channel; + ptp->rx_ts_inline = efx_nic_rev(efx) >= EFX_REV_HUNT_A0; + rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int), GFP_KERNEL); if (rc != 0) goto fail1; - ptp->channel = channel; skb_queue_head_init(&ptp->rxq); skb_queue_head_init(&ptp->txq); ptp->workwq = create_singlethread_workqueue("sfc_ptp"); @@ -929,33 +1255,32 @@ static int efx_ptp_probe_channel(struct efx_channel *channel) list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list); ptp->evt_overflow = false; - ptp->phc_clock_info.owner = THIS_MODULE; - snprintf(ptp->phc_clock_info.name, - sizeof(ptp->phc_clock_info.name), - "%pm", efx->net_dev->perm_addr); - ptp->phc_clock_info.max_adj = MAX_PPB; - ptp->phc_clock_info.n_alarm = 0; - ptp->phc_clock_info.n_ext_ts = 0; - ptp->phc_clock_info.n_per_out = 0; - ptp->phc_clock_info.pps = 1; - ptp->phc_clock_info.adjfreq = efx_phc_adjfreq; - ptp->phc_clock_info.adjtime = efx_phc_adjtime; - ptp->phc_clock_info.gettime = efx_phc_gettime; - ptp->phc_clock_info.settime = efx_phc_settime; - ptp->phc_clock_info.enable = efx_phc_enable; - - ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info, - &efx->pci_dev->dev); - if (IS_ERR(ptp->phc_clock)) { - rc = PTR_ERR(ptp->phc_clock); + /* Get the NIC PTP attributes and set up time conversions */ + rc = efx_ptp_get_attributes(efx); + if (rc < 0) goto fail3; - } - INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker); - ptp->pps_workwq = create_singlethread_workqueue("sfc_pps"); - if (!ptp->pps_workwq) { - rc = -ENOMEM; - goto fail4; + /* Get the timestamp corrections */ + rc = efx_ptp_get_timestamp_corrections(efx); + if (rc < 0) + goto fail3; + + if (efx->mcdi->fn_flags & + (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY)) { + ptp->phc_clock_info = efx_phc_clock_info; + ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info, + &efx->pci_dev->dev); + if (IS_ERR(ptp->phc_clock)) { + rc = PTR_ERR(ptp->phc_clock); + goto fail3; + } + + INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker); + ptp->pps_workwq = create_singlethread_workqueue("sfc_pps"); + if (!ptp->pps_workwq) { + rc = -ENOMEM; + goto fail4; + } } ptp->nic_ts_enabled = false; @@ -976,14 +1301,27 @@ fail1: return rc; } -static void efx_ptp_remove_channel(struct efx_channel *channel) +/* Initialise PTP channel. + * + * Setting core_index to zero causes the queue to be initialised and doesn't + * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue. + */ +static int efx_ptp_probe_channel(struct efx_channel *channel) { struct efx_nic *efx = channel->efx; + channel->irq_moderation = 0; + channel->rx_queue.core_index = 0; + + return efx_ptp_probe(efx, channel); +} + +void efx_ptp_remove(struct efx_nic *efx) +{ if (!efx->ptp_data) return; - (void)efx_ptp_disable(channel->efx); + (void)efx_ptp_disable(efx); cancel_work_sync(&efx->ptp_data->work); cancel_work_sync(&efx->ptp_data->pps_work); @@ -991,15 +1329,22 @@ static void efx_ptp_remove_channel(struct efx_channel *channel) skb_queue_purge(&efx->ptp_data->rxq); skb_queue_purge(&efx->ptp_data->txq); - ptp_clock_unregister(efx->ptp_data->phc_clock); + if (efx->ptp_data->phc_clock) { + destroy_workqueue(efx->ptp_data->pps_workwq); + ptp_clock_unregister(efx->ptp_data->phc_clock); + } destroy_workqueue(efx->ptp_data->workwq); - destroy_workqueue(efx->ptp_data->pps_workwq); efx_nic_free_buffer(efx, &efx->ptp_data->start); kfree(efx->ptp_data); } +static void efx_ptp_remove_channel(struct efx_channel *channel) +{ + efx_ptp_remove(channel->efx); +} + static void efx_ptp_get_channel_name(struct efx_channel *channel, char *buf, size_t len) { @@ -1080,14 +1425,8 @@ static bool efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb) /* Does this packet require timestamping? */ if (ntohs(*(__be16 *)&skb->data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) { - struct skb_shared_hwtstamps *timestamps; - match->state = PTP_PACKET_STATE_UNMATCHED; - /* Clear all timestamps held: filled in later */ - timestamps = skb_hwtstamps(skb); - memset(timestamps, 0, sizeof(*timestamps)); - /* We expect the sequence number to be in the same position in * the packet for PTP V1 and V2 */ @@ -1132,8 +1471,13 @@ int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb) return NETDEV_TX_OK; } -static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted, - unsigned int new_mode) +int efx_ptp_get_mode(struct efx_nic *efx) +{ + return efx->ptp_data->mode; +} + +int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted, + unsigned int new_mode) { if ((enable_wanted != efx->ptp_data->enabled) || (enable_wanted && (efx->ptp_data->mode != new_mode))) { @@ -1177,8 +1521,6 @@ static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted, static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init) { - bool enable_wanted = false; - unsigned int new_mode; int rc; if (init->flags) @@ -1188,63 +1530,20 @@ static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init) (init->tx_type != HWTSTAMP_TX_ON)) return -ERANGE; - new_mode = efx->ptp_data->mode; - /* Determine whether any PTP HW operations are required */ - switch (init->rx_filter) { - case HWTSTAMP_FILTER_NONE: - break; - case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: - init->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; - new_mode = MC_CMD_PTP_MODE_V1; - enable_wanted = true; - break; - case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: - /* Although these three are accepted only IPV4 packets will be - * timestamped - */ - init->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; - new_mode = MC_CMD_PTP_MODE_V2_ENHANCED; - enable_wanted = true; - break; - case HWTSTAMP_FILTER_PTP_V2_EVENT: - case HWTSTAMP_FILTER_PTP_V2_SYNC: - case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: - case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: - case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: - case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: - /* Non-IP + IPv6 timestamping not supported */ - return -ERANGE; - break; - default: - return -ERANGE; - } - - if (init->tx_type != HWTSTAMP_TX_OFF) - enable_wanted = true; - - /* Old versions of the firmware do not support the improved - * UUID filtering option (SF bug 33070). If the firmware does - * not accept the enhanced mode, fall back to the standard PTP - * v2 UUID filtering. - */ - rc = efx_ptp_change_mode(efx, enable_wanted, new_mode); - if ((rc != 0) && (new_mode == MC_CMD_PTP_MODE_V2_ENHANCED)) - rc = efx_ptp_change_mode(efx, enable_wanted, MC_CMD_PTP_MODE_V2); - if (rc != 0) + rc = efx->type->ptp_set_ts_config(efx, init); + if (rc) return rc; efx->ptp_data->config = *init; - return 0; } void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info) { struct efx_ptp_data *ptp = efx->ptp_data; + struct efx_nic *primary = efx->primary; + + ASSERT_RTNL(); if (!ptp) return; @@ -1252,18 +1551,14 @@ void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info) ts_info->so_timestamping |= (SOF_TIMESTAMPING_TX_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE | SOF_TIMESTAMPING_RAW_HARDWARE); - ts_info->phc_index = ptp_clock_index(ptp->phc_clock); + if (primary && primary->ptp_data && primary->ptp_data->phc_clock) + ts_info->phc_index = + ptp_clock_index(primary->ptp_data->phc_clock); ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON; - ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE | - 1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT | - 1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC | - 1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ | - 1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT | - 1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC | - 1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ); + ts_info->rx_filters = ptp->efx->type->hwtstamp_filters; } -int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd) +int efx_ptp_set_ts_config(struct efx_nic *efx, struct ifreq *ifr) { struct hwtstamp_config config; int rc; @@ -1283,6 +1578,15 @@ int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd) ? -EFAULT : 0; } +int efx_ptp_get_ts_config(struct efx_nic *efx, struct ifreq *ifr) +{ + if (!efx->ptp_data) + return -EOPNOTSUPP; + + return copy_to_user(ifr->ifr_data, &efx->ptp_data->config, + sizeof(efx->ptp_data->config)) ? -EFAULT : 0; +} + static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len) { struct efx_ptp_data *ptp = efx->ptp_data; @@ -1302,6 +1606,9 @@ static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp) { struct efx_ptp_event_rx *evt = NULL; + if (WARN_ON_ONCE(ptp->rx_ts_inline)) + return; + if (ptp->evt_frag_idx != 3) { ptp_event_failure(efx, 3); return; @@ -1320,9 +1627,10 @@ static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp) MCDI_EVENT_SRC) << 8) | (EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_SRC) << 16)); - evt->hwtimestamp = ktime_set( + 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)); + EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA), + ptp->ts_corrections.rx); evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS); list_add_tail(&evt->link, &ptp->evt_list); @@ -1397,12 +1705,99 @@ void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev) } } +void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev) +{ + channel->sync_timestamp_major = MCDI_EVENT_FIELD(*ev, PTP_TIME_MAJOR); + channel->sync_timestamp_minor = + MCDI_EVENT_FIELD(*ev, PTP_TIME_MINOR_26_19) << 19; + /* if sync events have been disabled then we want to silently ignore + * this event, so throw away result. + */ + (void) cmpxchg(&channel->sync_events_state, SYNC_EVENTS_REQUESTED, + SYNC_EVENTS_VALID); +} + +/* make some assumptions about the time representation rather than abstract it, + * since we currently only support one type of inline timestamping and only on + * EF10. + */ +#define MINOR_TICKS_PER_SECOND 0x8000000 +/* Fuzz factor for sync events to be out of order with RX events */ +#define FUZZ (MINOR_TICKS_PER_SECOND / 10) +#define EXPECTED_SYNC_EVENTS_PER_SECOND 4 + +static inline u32 efx_rx_buf_timestamp_minor(struct efx_nic *efx, const u8 *eh) +{ +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) + return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_ts_offset)); +#else + const u8 *data = eh + efx->rx_packet_ts_offset; + return (u32)data[0] | + (u32)data[1] << 8 | + (u32)data[2] << 16 | + (u32)data[3] << 24; +#endif +} + +void __efx_rx_skb_attach_timestamp(struct efx_channel *channel, + struct sk_buff *skb) +{ + struct efx_nic *efx = channel->efx; + u32 pkt_timestamp_major, pkt_timestamp_minor; + u32 diff, carry; + struct skb_shared_hwtstamps *timestamps; + + pkt_timestamp_minor = (efx_rx_buf_timestamp_minor(efx, + skb_mac_header(skb)) + + (u32) efx->ptp_data->ts_corrections.rx) & + (MINOR_TICKS_PER_SECOND - 1); + + /* get the difference between the packet and sync timestamps, + * modulo one second + */ + diff = (pkt_timestamp_minor - channel->sync_timestamp_minor) & + (MINOR_TICKS_PER_SECOND - 1); + /* do we roll over a second boundary and need to carry the one? */ + carry = channel->sync_timestamp_minor + diff > MINOR_TICKS_PER_SECOND ? + 1 : 0; + + if (diff <= MINOR_TICKS_PER_SECOND / EXPECTED_SYNC_EVENTS_PER_SECOND + + FUZZ) { + /* packet is ahead of the sync event by a quarter of a second or + * less (allowing for fuzz) + */ + pkt_timestamp_major = channel->sync_timestamp_major + carry; + } else if (diff >= MINOR_TICKS_PER_SECOND - FUZZ) { + /* packet is behind the sync event but within the fuzz factor. + * This means the RX packet and sync event crossed as they were + * placed on the event queue, which can sometimes happen. + */ + pkt_timestamp_major = channel->sync_timestamp_major - 1 + carry; + } else { + /* it's outside tolerance in both directions. this might be + * indicative of us missing sync events for some reason, so + * we'll call it an error rather than risk giving a bogus + * timestamp. + */ + netif_vdbg(efx, drv, efx->net_dev, + "packet timestamp %x too far from sync event %x:%x\n", + pkt_timestamp_minor, channel->sync_timestamp_major, + channel->sync_timestamp_minor); + return; + } + + /* attach the timestamps to the skb */ + timestamps = skb_hwtstamps(skb); + timestamps->hwtstamp = + efx_ptp_s27_to_ktime(pkt_timestamp_major, pkt_timestamp_minor); +} + static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta) { struct efx_ptp_data *ptp_data = container_of(ptp, struct efx_ptp_data, phc_clock_info); - struct efx_nic *efx = ptp_data->channel->efx; + struct efx_nic *efx = ptp_data->efx; MCDI_DECLARE_BUF(inadj, MC_CMD_PTP_IN_ADJUST_LEN); s64 adjustment_ns; int rc; @@ -1432,18 +1827,20 @@ static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta) static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta) { + u32 nic_major, nic_minor; struct efx_ptp_data *ptp_data = container_of(ptp, struct efx_ptp_data, phc_clock_info); - struct efx_nic *efx = ptp_data->channel->efx; - struct timespec delta_ts = ns_to_timespec(delta); + struct efx_nic *efx = ptp_data->efx; MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ADJUST_LEN); + efx->ptp_data->ns_to_nic_time(delta, &nic_major, &nic_minor); + MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST); MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); MCDI_SET_QWORD(inbuf, PTP_IN_ADJUST_FREQ, ptp_data->current_adjfreq); - MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_SECONDS, (u32)delta_ts.tv_sec); - MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_NANOSECONDS, (u32)delta_ts.tv_nsec); + MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MAJOR, nic_major); + MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MINOR, nic_minor); return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), NULL, 0, NULL); } @@ -1453,10 +1850,11 @@ static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts) struct efx_ptp_data *ptp_data = container_of(ptp, struct efx_ptp_data, phc_clock_info); - struct efx_nic *efx = ptp_data->channel->efx; + struct efx_nic *efx = ptp_data->efx; MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_READ_NIC_TIME_LEN); MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_READ_NIC_TIME_LEN); int rc; + ktime_t kt; MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME); MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); @@ -1466,8 +1864,10 @@ static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts) if (rc != 0) return rc; - ts->tv_sec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_SECONDS); - ts->tv_nsec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_NANOSECONDS); + kt = ptp_data->nic_to_kernel_time( + MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MAJOR), + MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MINOR), 0); + *ts = ktime_to_timespec(kt); return 0; } @@ -1519,7 +1919,7 @@ static const struct efx_channel_type efx_ptp_channel_type = { .keep_eventq = false, }; -void efx_ptp_probe(struct efx_nic *efx) +void efx_ptp_defer_probe_with_channel(struct efx_nic *efx) { /* Check whether PTP is implemented on this NIC. The DISABLE * operation will succeed if and only if it is implemented. @@ -1533,9 +1933,15 @@ void efx_ptp_start_datapath(struct efx_nic *efx) { if (efx_ptp_restart(efx)) netif_err(efx, drv, efx->net_dev, "Failed to restart PTP.\n"); + /* re-enable timestamping if it was previously enabled */ + if (efx->type->ptp_set_ts_sync_events) + efx->type->ptp_set_ts_sync_events(efx, true, true); } void efx_ptp_stop_datapath(struct efx_nic *efx) { + /* temporarily disable timestamping */ + if (efx->type->ptp_set_ts_sync_events) + efx->type->ptp_set_ts_sync_events(efx, false, true); efx_ptp_stop(efx); } |