+#include "sfc_kvargs.h"
+
+/** Default MAC statistics update period is 1 second */
+#define SFC_MAC_STATS_UPDATE_PERIOD_MS_DEF MS_PER_S
+
+/** The number of microseconds to sleep on attempt to get statistics update */
+#define SFC_MAC_STATS_UPDATE_RETRY_INTERVAL_US 10
+
+/** The number of attempts to await arrival of freshly generated statistics */
+#define SFC_MAC_STATS_UPDATE_NB_ATTEMPTS 50
+
+/**
+ * Update MAC statistics in the buffer.
+ *
+ * @param sa Adapter
+ *
+ * @return Status code
+ * @retval 0 Success
+ * @retval EAGAIN Try again
+ * @retval ENOMEM Memory allocation failure
+ */
+int
+sfc_port_update_mac_stats(struct sfc_adapter *sa)
+{
+ struct sfc_port *port = &sa->port;
+ efsys_mem_t *esmp = &port->mac_stats_dma_mem;
+ uint32_t *genp = NULL;
+ uint32_t gen_old;
+ unsigned int nb_attempts = 0;
+ int rc;
+
+ SFC_ASSERT(rte_spinlock_is_locked(&port->mac_stats_lock));
+
+ if (sa->state != SFC_ADAPTER_STARTED)
+ return EINVAL;
+
+ /*
+ * 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;
+
+ genp = &port->mac_stats_update_generation;
+ gen_old = *genp;
+ }
+
+ do {
+ if (nb_attempts > 0)
+ rte_delay_us(SFC_MAC_STATS_UPDATE_RETRY_INTERVAL_US);
+
+ rc = efx_mac_stats_update(sa->nic, esmp,
+ port->mac_stats_buf, genp);
+ if (rc != 0)
+ return rc;
+
+ } while ((genp != NULL) && (*genp == gen_old) &&
+ (++nb_attempts < SFC_MAC_STATS_UPDATE_NB_ATTEMPTS));
+
+ return 0;
+}
+
+static void
+sfc_port_reset_sw_stats(struct sfc_adapter *sa)
+{
+ struct sfc_port *port = &sa->port;
+
+ /*
+ * Reset diff stats explicitly since check which does not allow
+ * the statistics to grow backward could deny it.
+ */
+ port->ipackets = 0;
+}
+
+int
+sfc_port_reset_mac_stats(struct sfc_adapter *sa)
+{
+ struct sfc_port *port = &sa->port;
+ int rc;
+
+ rte_spinlock_lock(&port->mac_stats_lock);
+ rc = efx_mac_stats_clear(sa->nic);
+ if (rc == 0)
+ sfc_port_reset_sw_stats(sa);
+ rte_spinlock_unlock(&port->mac_stats_lock);
+
+ return rc;
+}
+
+static int
+sfc_port_init_dev_link(struct sfc_adapter *sa)
+{
+ struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
+ int rc;
+ efx_link_mode_t link_mode;
+ struct rte_eth_link current_link;
+
+ rc = efx_port_poll(sa->nic, &link_mode);
+ if (rc != 0)
+ return rc;
+
+ sfc_port_link_mode_to_info(link_mode, ¤t_link);
+
+ EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
+ rte_atomic64_set((rte_atomic64_t *)dev_link,
+ *(uint64_t *)¤t_link);
+
+ return 0;
+}
+
+#if EFSYS_OPT_LOOPBACK