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net/sfc: poll MAC stats if periodic DMA is not supported

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If periodic DMA statistics feature is absent (particularly,
while running over VF), the PMD must provide an ability to
cope with it using explicit update requests which are kept
restrained according to 'stats_update_period_ms' parameter

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@solarflare.com>
This commit is contained in:
Ivan Malov 2017-03-09 17:23:00 +00:00 committed by Ferruh Yigit
parent e56fa9c23e
commit 178fc0d327
2 changed files with 33 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/sfc/sfc.h
View File

@ -162,6 +162,8 @@ struct sfc_port {
boolean_t mac_stats_reset_pending;
uint16_t mac_stats_update_period_ms;
uint32_t mac_stats_update_generation;
boolean_t mac_stats_periodic_dma_supported;
uint64_t mac_stats_last_request_timestamp;
uint32_t mac_stats_mask[EFX_MAC_STATS_MASK_NPAGES];
};
@ -262,6 +264,13 @@ sfc_adapter_lock_fini(__rte_unused struct sfc_adapter *sa)
/* Just for symmetry of the API */
}
/** Get the number of milliseconds since boot from the default timer */
static inline uint64_t
sfc_get_system_msecs(void)
{
return rte_get_timer_cycles() * MS_PER_S / rte_get_timer_hz();
}
int sfc_dma_alloc(const struct sfc_adapter *sa, const char *name, uint16_t id,
size_t len, int socket_id, efsys_mem_t *esmp);
void sfc_dma_free(const struct sfc_adapter *sa, efsys_mem_t *esmp);

27
drivers/net/sfc/sfc_port.c
View File

@ -67,8 +67,23 @@ sfc_port_update_mac_stats(struct sfc_adapter *sa)
if (sa->state != SFC_ADAPTER_STARTED)
return EINVAL;
/* If periodic statistics DMA'ing is off, request explicitly */
if (port->mac_stats_update_period_ms == 0) {
/*
* If periodic statistics DMA'ing is off or if not supported,
* make a manual request and keep an eye on timer if need be
*/
if (!port->mac_stats_periodic_dma_supported ||
(port->mac_stats_update_period_ms == 0)) {
if (port->mac_stats_update_period_ms != 0) {
uint64_t timestamp = sfc_get_system_msecs();
if ((timestamp -
port->mac_stats_last_request_timestamp) <
port->mac_stats_update_period_ms)
return 0;
port->mac_stats_last_request_timestamp = timestamp;
}
rc = efx_mac_stats_upload(sa->nic, esmp);
if (rc != 0)
return rc;
@ -215,8 +230,14 @@ sfc_port_start(struct sfc_adapter *sa)
rc = efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
port->mac_stats_update_period_ms,
B_FALSE);
if (rc != 0)
if (rc == 0) {
port->mac_stats_periodic_dma_supported = B_TRUE;
} else if (rc == EOPNOTSUPP) {
port->mac_stats_periodic_dma_supported = B_FALSE;
port->mac_stats_last_request_timestamp = 0;
} else {
goto fail_mac_stats_periodic;
}
}
sfc_log_init(sa, "disable MAC drain");