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sfc: Add PTP counters to ethtool stats

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These were implemented by Andrew Jackson and Laurence Evans but not
previously included in-tree.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-12-11 02:36:08 +00:00
parent 79ac47ae74
commit 99691c4ac1
3 changed files with 127 additions and 9 deletions
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8
drivers/net/ethernet/sfc/ethtool.c
View File

@ -359,7 +359,8 @@ static int efx_ethtool_get_sset_count(struct net_device *net_dev,
switch (string_set) {
case ETH_SS_STATS:
return efx->type->describe_stats(efx, NULL) +
EFX_ETHTOOL_SW_STAT_COUNT;
EFX_ETHTOOL_SW_STAT_COUNT +
efx_ptp_describe_stats(efx, NULL);
case ETH_SS_TEST:
return efx_ethtool_fill_self_tests(efx, NULL, NULL, NULL);
default:
@ -380,6 +381,8 @@ static void efx_ethtool_get_strings(struct net_device *net_dev,
for (i = 0; i < EFX_ETHTOOL_SW_STAT_COUNT; i++)
strlcpy(strings + i * ETH_GSTRING_LEN,
efx_sw_stat_desc[i].name, ETH_GSTRING_LEN);
strings += EFX_ETHTOOL_SW_STAT_COUNT * ETH_GSTRING_LEN;
efx_ptp_describe_stats(efx, strings);
break;
case ETH_SS_TEST:
efx_ethtool_fill_self_tests(efx, NULL, strings, NULL);
@ -429,8 +432,11 @@ static void efx_ethtool_get_stats(struct net_device *net_dev,
break;
}
}
data += EFX_ETHTOOL_SW_STAT_COUNT;
spin_unlock_bh(&efx->stats_lock);
efx_ptp_update_stats(efx, data);
}
static void efx_ethtool_self_test(struct net_device *net_dev,

2
drivers/net/ethernet/sfc/nic.h
View File

@ -566,6 +566,8 @@ int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
unsigned int new_mode);
int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings);
size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats);
void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev);
void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
struct sk_buff *skb);

126
drivers/net/ethernet/sfc/ptp.c
View File

@ -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 */