diff --git a/sys/contrib/ena-com/ena_com.h b/sys/contrib/ena-com/ena_com.h --- a/sys/contrib/ena-com/ena_com.h +++ b/sys/contrib/ena-com/ena_com.h @@ -667,6 +667,16 @@ */ void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data); +/* ena_com_aenq_has_keep_alive - Retrieve if there is a keep alive notification in the aenq + * @ena_dev: ENA communication layer struct + * + * This method goes over the async event notification queue and returns if there + * is a keep alive notification. + * + * @return - true if there is a keep alive notification in the aenq or false otherwise + */ +bool ena_com_aenq_has_keep_alive(struct ena_com_dev *ena_dev); + /* ena_com_abort_admin_commands - Abort all the outstanding admin commands. * @ena_dev: ENA communication layer struct * diff --git a/sys/contrib/ena-com/ena_com.c b/sys/contrib/ena-com/ena_com.c --- a/sys/contrib/ena-com/ena_com.c +++ b/sys/contrib/ena-com/ena_com.c @@ -2491,6 +2491,45 @@ ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF); mmiowb(); } + +bool ena_com_aenq_has_keep_alive(struct ena_com_dev *ena_dev) +{ + struct ena_admin_aenq_common_desc *aenq_common; + struct ena_com_aenq *aenq = &ena_dev->aenq; + struct ena_admin_aenq_entry *aenq_e; + u8 phase = aenq->phase; + u16 masked_head; + + masked_head = aenq->head & (aenq->q_depth - 1); + aenq_e = &aenq->entries[masked_head]; /* Get first entry */ + aenq_common = &aenq_e->aenq_common_desc; + + /* Go over all the events */ + while ((READ_ONCE8(aenq_common->flags) & + ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) { + /* Make sure the device finished writing the rest of the descriptor + * before reading it. + */ + dma_rmb(); + + if (aenq_common->group == ENA_ADMIN_KEEP_ALIVE) + return true; + + /* Get next event entry */ + masked_head++; + + if (unlikely(masked_head == aenq->q_depth)) { + masked_head = 0; + phase = !phase; + } + + aenq_e = &aenq->entries[masked_head]; + aenq_common = &aenq_e->aenq_common_desc; + } + + return false; +} + #ifdef ENA_EXTENDED_STATS /* * Sets the function Idx and Queue Idx to be used for