X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fsfc%2Fsfc_ev.c;h=160d39f966d0535a535694040427ac6a8c91d958;hb=af1475918124;hp=42009c0f7e393383e49f45b325bb582a27ef442a;hpb=98200dd9ddfedba909e313d05edfe43ef1ae8a49;p=dpdk.git

diff --git a/drivers/net/sfc/sfc_ev.c b/drivers/net/sfc/sfc_ev.c
index 42009c0f7e..160d39f966 100644
--- a/drivers/net/sfc/sfc_ev.c
+++ b/drivers/net/sfc/sfc_ev.c
@@ -1,5 +1,7 @@
 /*-
- * Copyright (c) 2016 Solarflare Communications Inc.
+ *   BSD LICENSE
+ *
+ * Copyright (c) 2016-2017 Solarflare Communications Inc.
  * All rights reserved.
  *
  * This software was jointly developed between OKTET Labs (under contract
@@ -29,6 +31,8 @@
 
 #include <rte_debug.h>
 #include <rte_cycles.h>
+#include <rte_alarm.h>
+#include <rte_branch_prediction.h>
 
 #include "efx.h"
 
@@ -36,6 +40,9 @@
 #include "sfc_debug.h"
 #include "sfc_log.h"
 #include "sfc_ev.h"
+#include "sfc_rx.h"
+#include "sfc_tx.h"
+#include "sfc_kvargs.h"
 
 
 /* Initial delay when waiting for event queue init complete event */
@@ -45,6 +52,24 @@
 /* Event queue init approx timeout */
 #define SFC_EVQ_INIT_TIMEOUT_US		(2 * US_PER_S)
 
+/* Management event queue polling period in microseconds */
+#define SFC_MGMT_EV_QPOLL_PERIOD_US	(US_PER_S)
+
+static const char *
+sfc_evq_type2str(enum sfc_evq_type type)
+{
+	switch (type) {
+	case SFC_EVQ_TYPE_MGMT:
+		return "mgmt-evq";
+	case SFC_EVQ_TYPE_RX:
+		return "rx-evq";
+	case SFC_EVQ_TYPE_TX:
+		return "tx-evq";
+	default:
+		SFC_ASSERT(B_FALSE);
+		return NULL;
+	}
+}
 
 static boolean_t
 sfc_ev_initialized(void *arg)
@@ -61,24 +86,156 @@ sfc_ev_initialized(void *arg)
 }
 
 static boolean_t
-sfc_ev_rx(void *arg, __rte_unused uint32_t label, __rte_unused uint32_t id,
-	  __rte_unused uint32_t size, __rte_unused uint16_t flags)
+sfc_ev_nop_rx(void *arg, uint32_t label, uint32_t id,
+	      uint32_t size, uint16_t flags)
 {
 	struct sfc_evq *evq = arg;
 
-	sfc_err(evq->sa, "EVQ %u unexpected Rx event", evq->evq_index);
+	sfc_err(evq->sa,
+		"EVQ %u unexpected Rx event label=%u id=%#x size=%u flags=%#x",
+		evq->evq_index, label, id, size, flags);
 	return B_TRUE;
 }
 
 static boolean_t
-sfc_ev_tx(void *arg, __rte_unused uint32_t label, __rte_unused uint32_t id)
+sfc_ev_efx_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
+	      uint32_t size, uint16_t flags)
+{
+	struct sfc_evq *evq = arg;
+	struct sfc_efx_rxq *rxq;
+	unsigned int stop;
+	unsigned int pending_id;
+	unsigned int delta;
+	unsigned int i;
+	struct sfc_efx_rx_sw_desc *rxd;
+
+	if (unlikely(evq->exception))
+		goto done;
+
+	rxq = sfc_efx_rxq_by_dp_rxq(evq->dp_rxq);
+
+	SFC_ASSERT(rxq != NULL);
+	SFC_ASSERT(rxq->evq == evq);
+	SFC_ASSERT(rxq->flags & SFC_EFX_RXQ_FLAG_STARTED);
+
+	stop = (id + 1) & rxq->ptr_mask;
+	pending_id = rxq->pending & rxq->ptr_mask;
+	delta = (stop >= pending_id) ? (stop - pending_id) :
+		(rxq->ptr_mask + 1 - pending_id + stop);
+
+	if (delta == 0) {
+		/*
+		 * Rx event with no new descriptors done and zero length
+		 * is used to abort scattered packet when there is no room
+		 * for the tail.
+		 */
+		if (unlikely(size != 0)) {
+			evq->exception = B_TRUE;
+			sfc_err(evq->sa,
+				"EVQ %u RxQ %u invalid RX abort "
+				"(id=%#x size=%u flags=%#x); needs restart",
+				evq->evq_index, rxq->dp.dpq.queue_id,
+				id, size, flags);
+			goto done;
+		}
+
+		/* Add discard flag to the first fragment */
+		rxq->sw_desc[pending_id].flags |= EFX_DISCARD;
+		/* Remove continue flag from the last fragment */
+		rxq->sw_desc[id].flags &= ~EFX_PKT_CONT;
+	} else if (unlikely(delta > rxq->batch_max)) {
+		evq->exception = B_TRUE;
+
+		sfc_err(evq->sa,
+			"EVQ %u RxQ %u completion out of order "
+			"(id=%#x delta=%u flags=%#x); needs restart",
+			evq->evq_index, rxq->dp.dpq.queue_id,
+			id, delta, flags);
+
+		goto done;
+	}
+
+	for (i = pending_id; i != stop; i = (i + 1) & rxq->ptr_mask) {
+		rxd = &rxq->sw_desc[i];
+
+		rxd->flags = flags;
+
+		SFC_ASSERT(size < (1 << 16));
+		rxd->size = (uint16_t)size;
+	}
+
+	rxq->pending += delta;
+
+done:
+	return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_dp_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
+	     __rte_unused uint32_t size, __rte_unused uint16_t flags)
+{
+	struct sfc_evq *evq = arg;
+	struct sfc_dp_rxq *dp_rxq;
+
+	dp_rxq = evq->dp_rxq;
+	SFC_ASSERT(dp_rxq != NULL);
+
+	SFC_ASSERT(evq->sa->dp_rx->qrx_ev != NULL);
+	return evq->sa->dp_rx->qrx_ev(dp_rxq, id);
+}
+
+static boolean_t
+sfc_ev_nop_tx(void *arg, uint32_t label, uint32_t id)
 {
 	struct sfc_evq *evq = arg;
 
-	sfc_err(evq->sa, "EVQ %u unexpected Tx event", evq->evq_index);
+	sfc_err(evq->sa, "EVQ %u unexpected Tx event label=%u id=%#x",
+		evq->evq_index, label, id);
 	return B_TRUE;
 }
 
+static boolean_t
+sfc_ev_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
+{
+	struct sfc_evq *evq = arg;
+	struct sfc_dp_txq *dp_txq;
+	struct sfc_efx_txq *txq;
+	unsigned int stop;
+	unsigned int delta;
+
+	dp_txq = evq->dp_txq;
+	SFC_ASSERT(dp_txq != NULL);
+
+	txq = sfc_efx_txq_by_dp_txq(dp_txq);
+	SFC_ASSERT(txq->evq == evq);
+
+	if (unlikely((txq->flags & SFC_EFX_TXQ_FLAG_STARTED) == 0))
+		goto done;
+
+	stop = (id + 1) & txq->ptr_mask;
+	id = txq->pending & txq->ptr_mask;
+
+	delta = (stop >= id) ? (stop - id) : (txq->ptr_mask + 1 - id + stop);
+
+	txq->pending += delta;
+
+done:
+	return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_dp_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
+{
+	struct sfc_evq *evq = arg;
+	struct sfc_dp_txq *dp_txq;
+
+	dp_txq = evq->dp_txq;
+	SFC_ASSERT(dp_txq != NULL);
+
+	SFC_ASSERT(evq->sa->dp_tx->qtx_ev != NULL);
+	return evq->sa->dp_tx->qtx_ev(dp_txq, id);
+}
+
 static boolean_t
 sfc_ev_exception(void *arg, __rte_unused uint32_t code,
 		 __rte_unused uint32_t data)
@@ -106,13 +263,42 @@ sfc_ev_exception(void *arg, __rte_unused uint32_t code,
 	return B_TRUE;
 }
 
+static boolean_t
+sfc_ev_nop_rxq_flush_done(void *arg, uint32_t rxq_hw_index)
+{
+	struct sfc_evq *evq = arg;
+
+	sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush done",
+		evq->evq_index, rxq_hw_index);
+	return B_TRUE;
+}
+
 static boolean_t
 sfc_ev_rxq_flush_done(void *arg, __rte_unused uint32_t rxq_hw_index)
 {
 	struct sfc_evq *evq = arg;
+	struct sfc_dp_rxq *dp_rxq;
+	struct sfc_rxq *rxq;
 
-	sfc_err(evq->sa, "EVQ %u unexpected Rx flush done event",
-		evq->evq_index);
+	dp_rxq = evq->dp_rxq;
+	SFC_ASSERT(dp_rxq != NULL);
+
+	rxq = sfc_rxq_by_dp_rxq(dp_rxq);
+	SFC_ASSERT(rxq != NULL);
+	SFC_ASSERT(rxq->hw_index == rxq_hw_index);
+	SFC_ASSERT(rxq->evq == evq);
+	sfc_rx_qflush_done(rxq);
+
+	return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_nop_rxq_flush_failed(void *arg, uint32_t rxq_hw_index)
+{
+	struct sfc_evq *evq = arg;
+
+	sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush failed",
+		evq->evq_index, rxq_hw_index);
 	return B_TRUE;
 }
 
@@ -120,9 +306,28 @@ static boolean_t
 sfc_ev_rxq_flush_failed(void *arg, __rte_unused uint32_t rxq_hw_index)
 {
 	struct sfc_evq *evq = arg;
+	struct sfc_dp_rxq *dp_rxq;
+	struct sfc_rxq *rxq;
 
-	sfc_err(evq->sa, "EVQ %u unexpected Rx flush failed event",
-		evq->evq_index);
+	dp_rxq = evq->dp_rxq;
+	SFC_ASSERT(dp_rxq != NULL);
+
+	rxq = sfc_rxq_by_dp_rxq(dp_rxq);
+	SFC_ASSERT(rxq != NULL);
+	SFC_ASSERT(rxq->hw_index == rxq_hw_index);
+	SFC_ASSERT(rxq->evq == evq);
+	sfc_rx_qflush_failed(rxq);
+
+	return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_nop_txq_flush_done(void *arg, uint32_t txq_hw_index)
+{
+	struct sfc_evq *evq = arg;
+
+	sfc_err(evq->sa, "EVQ %u unexpected TxQ %u flush done",
+		evq->evq_index, txq_hw_index);
 	return B_TRUE;
 }
 
@@ -130,10 +335,19 @@ static boolean_t
 sfc_ev_txq_flush_done(void *arg, __rte_unused uint32_t txq_hw_index)
 {
 	struct sfc_evq *evq = arg;
+	struct sfc_dp_txq *dp_txq;
+	struct sfc_txq *txq;
 
-	sfc_err(evq->sa, "EVQ %u unexpected Tx flush done event",
-		evq->evq_index);
-	return B_TRUE;
+	dp_txq = evq->dp_txq;
+	SFC_ASSERT(dp_txq != NULL);
+
+	txq = sfc_txq_by_dp_txq(dp_txq);
+	SFC_ASSERT(txq != NULL);
+	SFC_ASSERT(txq->hw_index == txq_hw_index);
+	SFC_ASSERT(txq->evq == evq);
+	sfc_tx_qflush_done(txq);
+
+	return B_FALSE;
 }
 
 static boolean_t
@@ -177,28 +391,118 @@ sfc_ev_timer(void *arg, uint32_t index)
 }
 
 static boolean_t
-sfc_ev_link_change(void *arg, __rte_unused efx_link_mode_t link_mode)
+sfc_ev_nop_link_change(void *arg, __rte_unused efx_link_mode_t link_mode)
 {
 	struct sfc_evq *evq = arg;
 
-	sfc_err(evq->sa, "EVQ %u unexpected link change",
+	sfc_err(evq->sa, "EVQ %u unexpected link change event",
 		evq->evq_index);
 	return B_TRUE;
 }
 
+static boolean_t
+sfc_ev_link_change(void *arg, efx_link_mode_t link_mode)
+{
+	struct sfc_evq *evq = arg;
+	struct sfc_adapter *sa = evq->sa;
+	struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
+	struct rte_eth_link new_link;
+	uint64_t new_link_u64;
+	uint64_t old_link_u64;
+
+	EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
+
+	sfc_port_link_mode_to_info(link_mode, &new_link);
+
+	new_link_u64 = *(uint64_t *)&new_link;
+	do {
+		old_link_u64 = rte_atomic64_read((rte_atomic64_t *)dev_link);
+		if (old_link_u64 == new_link_u64)
+			break;
+
+		if (rte_atomic64_cmpset((volatile uint64_t *)dev_link,
+					old_link_u64, new_link_u64)) {
+			evq->sa->port.lsc_seq++;
+			break;
+		}
+	} while (B_TRUE);
+
+	return B_FALSE;
+}
+
 static const efx_ev_callbacks_t sfc_ev_callbacks = {
 	.eec_initialized	= sfc_ev_initialized,
-	.eec_rx			= sfc_ev_rx,
-	.eec_tx			= sfc_ev_tx,
+	.eec_rx			= sfc_ev_nop_rx,
+	.eec_tx			= sfc_ev_nop_tx,
+	.eec_exception		= sfc_ev_exception,
+	.eec_rxq_flush_done	= sfc_ev_nop_rxq_flush_done,
+	.eec_rxq_flush_failed	= sfc_ev_nop_rxq_flush_failed,
+	.eec_txq_flush_done	= sfc_ev_nop_txq_flush_done,
+	.eec_software		= sfc_ev_software,
+	.eec_sram		= sfc_ev_sram,
+	.eec_wake_up		= sfc_ev_wake_up,
+	.eec_timer		= sfc_ev_timer,
+	.eec_link_change	= sfc_ev_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_efx_rx = {
+	.eec_initialized	= sfc_ev_initialized,
+	.eec_rx			= sfc_ev_efx_rx,
+	.eec_tx			= sfc_ev_nop_tx,
+	.eec_exception		= sfc_ev_exception,
+	.eec_rxq_flush_done	= sfc_ev_rxq_flush_done,
+	.eec_rxq_flush_failed	= sfc_ev_rxq_flush_failed,
+	.eec_txq_flush_done	= sfc_ev_nop_txq_flush_done,
+	.eec_software		= sfc_ev_software,
+	.eec_sram		= sfc_ev_sram,
+	.eec_wake_up		= sfc_ev_wake_up,
+	.eec_timer		= sfc_ev_timer,
+	.eec_link_change	= sfc_ev_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_dp_rx = {
+	.eec_initialized	= sfc_ev_initialized,
+	.eec_rx			= sfc_ev_dp_rx,
+	.eec_tx			= sfc_ev_nop_tx,
 	.eec_exception		= sfc_ev_exception,
 	.eec_rxq_flush_done	= sfc_ev_rxq_flush_done,
 	.eec_rxq_flush_failed	= sfc_ev_rxq_flush_failed,
+	.eec_txq_flush_done	= sfc_ev_nop_txq_flush_done,
+	.eec_software		= sfc_ev_software,
+	.eec_sram		= sfc_ev_sram,
+	.eec_wake_up		= sfc_ev_wake_up,
+	.eec_timer		= sfc_ev_timer,
+	.eec_link_change	= sfc_ev_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_efx_tx = {
+	.eec_initialized	= sfc_ev_initialized,
+	.eec_rx			= sfc_ev_nop_rx,
+	.eec_tx			= sfc_ev_tx,
+	.eec_exception		= sfc_ev_exception,
+	.eec_rxq_flush_done	= sfc_ev_nop_rxq_flush_done,
+	.eec_rxq_flush_failed	= sfc_ev_nop_rxq_flush_failed,
 	.eec_txq_flush_done	= sfc_ev_txq_flush_done,
 	.eec_software		= sfc_ev_software,
 	.eec_sram		= sfc_ev_sram,
 	.eec_wake_up		= sfc_ev_wake_up,
 	.eec_timer		= sfc_ev_timer,
-	.eec_link_change	= sfc_ev_link_change,
+	.eec_link_change	= sfc_ev_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_dp_tx = {
+	.eec_initialized	= sfc_ev_initialized,
+	.eec_rx			= sfc_ev_nop_rx,
+	.eec_tx			= sfc_ev_dp_tx,
+	.eec_exception		= sfc_ev_exception,
+	.eec_rxq_flush_done	= sfc_ev_nop_rxq_flush_done,
+	.eec_rxq_flush_failed	= sfc_ev_nop_rxq_flush_failed,
+	.eec_txq_flush_done	= sfc_ev_txq_flush_done,
+	.eec_software		= sfc_ev_software,
+	.eec_sram		= sfc_ev_sram,
+	.eec_wake_up		= sfc_ev_wake_up,
+	.eec_timer		= sfc_ev_timer,
+	.eec_link_change	= sfc_ev_nop_link_change,
 };
 
 
@@ -210,11 +514,67 @@ sfc_ev_qpoll(struct sfc_evq *evq)
 
 	/* Synchronize the DMA memory for reading not required */
 
-	efx_ev_qpoll(evq->common, &evq->read_ptr, &sfc_ev_callbacks, evq);
+	efx_ev_qpoll(evq->common, &evq->read_ptr, evq->callbacks, evq);
+
+	if (unlikely(evq->exception) && sfc_adapter_trylock(evq->sa)) {
+		struct sfc_adapter *sa = evq->sa;
+		int rc;
+
+		if (evq->dp_rxq != NULL) {
+			unsigned int rxq_sw_index;
+
+			rxq_sw_index = evq->dp_rxq->dpq.queue_id;
+
+			sfc_warn(sa,
+				 "restart RxQ %u because of exception on its EvQ %u",
+				 rxq_sw_index, evq->evq_index);
+
+			sfc_rx_qstop(sa, rxq_sw_index);
+			rc = sfc_rx_qstart(sa, rxq_sw_index);
+			if (rc != 0)
+				sfc_err(sa, "cannot restart RxQ %u",
+					rxq_sw_index);
+		}
+
+		if (evq->dp_txq != NULL) {
+			unsigned int txq_sw_index;
+
+			txq_sw_index = evq->dp_txq->dpq.queue_id;
+
+			sfc_warn(sa,
+				 "restart TxQ %u because of exception on its EvQ %u",
+				 txq_sw_index, evq->evq_index);
+
+			sfc_tx_qstop(sa, txq_sw_index);
+			rc = sfc_tx_qstart(sa, txq_sw_index);
+			if (rc != 0)
+				sfc_err(sa, "cannot restart TxQ %u",
+					txq_sw_index);
+		}
+
+		if (evq->exception)
+			sfc_panic(sa, "unrecoverable exception on EvQ %u",
+				  evq->evq_index);
+
+		sfc_adapter_unlock(sa);
+	}
 
 	/* Poll-mode driver does not re-prime the event queue for interrupts */
 }
 
+void
+sfc_ev_mgmt_qpoll(struct sfc_adapter *sa)
+{
+	if (rte_spinlock_trylock(&sa->mgmt_evq_lock)) {
+		struct sfc_evq *mgmt_evq = sa->mgmt_evq;
+
+		if (mgmt_evq->init_state == SFC_EVQ_STARTED)
+			sfc_ev_qpoll(mgmt_evq);
+
+		rte_spinlock_unlock(&sa->mgmt_evq_lock);
+	}
+}
+
 int
 sfc_ev_qprime(struct sfc_evq *evq)
 {
@@ -222,35 +582,53 @@ sfc_ev_qprime(struct sfc_evq *evq)
 	return efx_ev_qprime(evq->common, evq->read_ptr);
 }
 
+/* Event queue HW index allocation scheme is described in sfc_ev.h. */
 int
-sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index)
+sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index)
 {
-	const struct sfc_evq_info *evq_info;
-	struct sfc_evq *evq;
+	struct sfc_adapter *sa = evq->sa;
 	efsys_mem_t *esmp;
+	uint32_t evq_flags = sa->evq_flags;
 	unsigned int total_delay_us;
 	unsigned int delay_us;
 	int rc;
 
-	sfc_log_init(sa, "sw_index=%u", sw_index);
+	sfc_log_init(sa, "hw_index=%u", hw_index);
 
-	evq_info = &sa->evq_info[sw_index];
-	evq = evq_info->evq;
 	esmp = &evq->mem;
 
+	evq->evq_index = hw_index;
+
 	/* Clear all events */
-	(void)memset((void *)esmp->esm_base, 0xff,
-		     EFX_EVQ_SIZE(evq_info->entries));
+	(void)memset((void *)esmp->esm_base, 0xff, EFX_EVQ_SIZE(evq->entries));
+
+	if (sa->intr.lsc_intr && hw_index == sa->mgmt_evq_index)
+		evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
+	else
+		evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
 
 	/* Create the common code event queue */
-	rc = efx_ev_qcreate(sa->nic, sw_index, esmp, evq_info->entries,
-			    0 /* unused on EF10 */, 0,
-			    EFX_EVQ_FLAGS_TYPE_THROUGHPUT |
-			    EFX_EVQ_FLAGS_NOTIFY_DISABLED,
+	rc = efx_ev_qcreate(sa->nic, hw_index, esmp, evq->entries,
+			    0 /* unused on EF10 */, 0, evq_flags,
 			    &evq->common);
 	if (rc != 0)
 		goto fail_ev_qcreate;
 
+	SFC_ASSERT(evq->dp_rxq == NULL || evq->dp_txq == NULL);
+	if (evq->dp_rxq != 0) {
+		if (strcmp(sa->dp_rx->dp.name, SFC_KVARG_DATAPATH_EFX) == 0)
+			evq->callbacks = &sfc_ev_callbacks_efx_rx;
+		else
+			evq->callbacks = &sfc_ev_callbacks_dp_rx;
+	} else if (evq->dp_txq != 0) {
+		if (strcmp(sa->dp_tx->dp.name, SFC_KVARG_DATAPATH_EFX) == 0)
+			evq->callbacks = &sfc_ev_callbacks_efx_tx;
+		else
+			evq->callbacks = &sfc_ev_callbacks_dp_tx;
+	} else {
+		evq->callbacks = &sfc_ev_callbacks;
+	}
+
 	evq->init_state = SFC_EVQ_STARTING;
 
 	/* Wait for the initialization event */
@@ -293,26 +671,56 @@ fail_ev_qcreate:
 }
 
 void
-sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index)
+sfc_ev_qstop(struct sfc_evq *evq)
 {
-	const struct sfc_evq_info *evq_info;
-	struct sfc_evq *evq;
-
-	sfc_log_init(sa, "sw_index=%u", sw_index);
-
-	SFC_ASSERT(sw_index < sa->evq_count);
+	if (evq == NULL)
+		return;
 
-	evq_info = &sa->evq_info[sw_index];
-	evq = evq_info->evq;
+	sfc_log_init(evq->sa, "hw_index=%u", evq->evq_index);
 
-	if (evq == NULL || evq->init_state != SFC_EVQ_STARTED)
+	if (evq->init_state != SFC_EVQ_STARTED)
 		return;
 
 	evq->init_state = SFC_EVQ_INITIALIZED;
+	evq->callbacks = NULL;
 	evq->read_ptr = 0;
 	evq->exception = B_FALSE;
 
 	efx_ev_qdestroy(evq->common);
+
+	evq->evq_index = 0;
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll(void *arg)
+{
+	struct sfc_adapter *sa = arg;
+	int rc;
+
+	sfc_ev_mgmt_qpoll(sa);
+
+	rc = rte_eal_alarm_set(SFC_MGMT_EV_QPOLL_PERIOD_US,
+			       sfc_ev_mgmt_periodic_qpoll, sa);
+	if (rc == -ENOTSUP) {
+		sfc_warn(sa, "alarms are not supported");
+		sfc_warn(sa, "management EVQ must be polled indirectly using no-wait link status update");
+	} else if (rc != 0) {
+		sfc_err(sa,
+			"cannot rearm management EVQ polling alarm (rc=%d)",
+			rc);
+	}
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll_start(struct sfc_adapter *sa)
+{
+	sfc_ev_mgmt_periodic_qpoll(sa);
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll_stop(struct sfc_adapter *sa)
+{
+	rte_eal_alarm_cancel(sfc_ev_mgmt_periodic_qpoll, sa);
 }
 
 int
@@ -326,13 +734,43 @@ sfc_ev_start(struct sfc_adapter *sa)
 	if (rc != 0)
 		goto fail_ev_init;
 
+	/* Start management EVQ used for global events */
+	rte_spinlock_lock(&sa->mgmt_evq_lock);
+
+	rc = sfc_ev_qstart(sa->mgmt_evq, sa->mgmt_evq_index);
+	if (rc != 0)
+		goto fail_mgmt_evq_start;
+
+	if (sa->intr.lsc_intr) {
+		rc = sfc_ev_qprime(sa->mgmt_evq);
+		if (rc != 0)
+			goto fail_evq0_prime;
+	}
+
+	rte_spinlock_unlock(&sa->mgmt_evq_lock);
+
 	/*
-	 * Rx/Tx event queues are started/stopped when corresponding queue
-	 * is started/stopped.
+	 * Start management EVQ polling. If interrupts are disabled
+	 * (not used), it is required to process link status change
+	 * and other device level events to avoid unrecoverable
+	 * error because the event queue overflow.
+	 */
+	sfc_ev_mgmt_periodic_qpoll_start(sa);
+
+	/*
+	 * Rx/Tx event queues are started/stopped when corresponding
+	 * Rx/Tx queue is started/stopped.
 	 */
 
 	return 0;
 
+fail_evq0_prime:
+	sfc_ev_qstop(sa->mgmt_evq);
+
+fail_mgmt_evq_start:
+	rte_spinlock_unlock(&sa->mgmt_evq_lock);
+	efx_ev_fini(sa->nic);
+
 fail_ev_init:
 	sfc_log_init(sa, "failed %d", rc);
 	return rc;
@@ -341,121 +779,120 @@ fail_ev_init:
 void
 sfc_ev_stop(struct sfc_adapter *sa)
 {
-	unsigned int sw_index;
-
 	sfc_log_init(sa, "entry");
 
-	/* Make sure that all event queues are stopped */
-	sw_index = sa->evq_count;
-	while (sw_index-- > 0)
-		sfc_ev_qstop(sa, sw_index);
+	sfc_ev_mgmt_periodic_qpoll_stop(sa);
+
+	rte_spinlock_lock(&sa->mgmt_evq_lock);
+	sfc_ev_qstop(sa->mgmt_evq);
+	rte_spinlock_unlock(&sa->mgmt_evq_lock);
 
 	efx_ev_fini(sa->nic);
 }
 
 int
-sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
-	     unsigned int entries, int socket_id)
+sfc_ev_qinit(struct sfc_adapter *sa,
+	     enum sfc_evq_type type, unsigned int type_index,
+	     unsigned int entries, int socket_id, struct sfc_evq **evqp)
 {
-	struct sfc_evq_info *evq_info;
 	struct sfc_evq *evq;
 	int rc;
 
-	sfc_log_init(sa, "sw_index=%u", sw_index);
-
-	evq_info = &sa->evq_info[sw_index];
+	sfc_log_init(sa, "type=%s type_index=%u",
+		     sfc_evq_type2str(type), type_index);
 
 	SFC_ASSERT(rte_is_power_of_2(entries));
-	SFC_ASSERT(entries <= evq_info->max_entries);
-	evq_info->entries = entries;
 
+	rc = ENOMEM;
 	evq = rte_zmalloc_socket("sfc-evq", sizeof(*evq), RTE_CACHE_LINE_SIZE,
 				 socket_id);
 	if (evq == NULL)
-		return ENOMEM;
+		goto fail_evq_alloc;
 
 	evq->sa = sa;
-	evq->evq_index = sw_index;
+	evq->type = type;
+	evq->entries = entries;
 
 	/* Allocate DMA space */
-	rc = sfc_dma_alloc(sa, "evq", sw_index, EFX_EVQ_SIZE(evq_info->entries),
-			   socket_id, &evq->mem);
+	rc = sfc_dma_alloc(sa, sfc_evq_type2str(type), type_index,
+			   EFX_EVQ_SIZE(evq->entries), socket_id, &evq->mem);
 	if (rc != 0)
-		return rc;
+		goto fail_dma_alloc;
 
 	evq->init_state = SFC_EVQ_INITIALIZED;
 
-	evq_info->evq = evq;
+	sa->evq_count++;
+
+	*evqp = evq;
 
 	return 0;
+
+fail_dma_alloc:
+	rte_free(evq);
+
+fail_evq_alloc:
+
+	sfc_log_init(sa, "failed %d", rc);
+	return rc;
 }
 
 void
-sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index)
+sfc_ev_qfini(struct sfc_evq *evq)
 {
-	struct sfc_evq *evq;
-
-	sfc_log_init(sa, "sw_index=%u", sw_index);
-
-	evq = sa->evq_info[sw_index].evq;
+	struct sfc_adapter *sa = evq->sa;
 
 	SFC_ASSERT(evq->init_state == SFC_EVQ_INITIALIZED);
 
-	sa->evq_info[sw_index].evq = NULL;
-
 	sfc_dma_free(sa, &evq->mem);
 
 	rte_free(evq);
+
+	SFC_ASSERT(sa->evq_count > 0);
+	sa->evq_count--;
 }
 
 static int
-sfc_ev_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
+sfc_kvarg_perf_profile_handler(__rte_unused const char *key,
+			       const char *value_str, void *opaque)
 {
-	struct sfc_evq_info *evq_info = &sa->evq_info[sw_index];
-	unsigned int max_entries;
+	uint64_t *value = opaque;
 
-	sfc_log_init(sa, "sw_index=%u", sw_index);
-
-	max_entries = sfc_evq_max_entries(sa, sw_index);
-	SFC_ASSERT(rte_is_power_of_2(max_entries));
-
-	evq_info->max_entries = max_entries;
+	if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_THROUGHPUT) == 0)
+		*value = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
+	else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_LOW_LATENCY) == 0)
+		*value = EFX_EVQ_FLAGS_TYPE_LOW_LATENCY;
+	else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_AUTO) == 0)
+		*value = EFX_EVQ_FLAGS_TYPE_AUTO;
+	else
+		return -EINVAL;
 
 	return 0;
 }
 
-static void
-sfc_ev_qfini_info(struct sfc_adapter *sa, unsigned int sw_index)
-{
-	sfc_log_init(sa, "sw_index=%u", sw_index);
-
-	/* Nothing to cleanup */
-}
-
 int
-sfc_ev_init(struct sfc_adapter *sa)
+sfc_ev_attach(struct sfc_adapter *sa)
 {
 	int rc;
-	unsigned int sw_index;
 
 	sfc_log_init(sa, "entry");
 
-	sa->evq_count = sfc_ev_qcount(sa);
+	sa->evq_flags = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
+	rc = sfc_kvargs_process(sa, SFC_KVARG_PERF_PROFILE,
+				sfc_kvarg_perf_profile_handler,
+				&sa->evq_flags);
+	if (rc != 0) {
+		sfc_err(sa, "invalid %s parameter value",
+			SFC_KVARG_PERF_PROFILE);
+		goto fail_kvarg_perf_profile;
+	}
+
 	sa->mgmt_evq_index = 0;
+	rte_spinlock_init(&sa->mgmt_evq_lock);
 
-	/* Allocate EVQ info array */
-	rc = ENOMEM;
-	sa->evq_info = rte_calloc_socket("sfc-evqs", sa->evq_count,
-					 sizeof(struct sfc_evq_info), 0,
-					 sa->socket_id);
-	if (sa->evq_info == NULL)
-		goto fail_evqs_alloc;
-
-	for (sw_index = 0; sw_index < sa->evq_count; ++sw_index) {
-		rc = sfc_ev_qinit_info(sa, sw_index);
-		if (rc != 0)
-			goto fail_ev_qinit_info;
-	}
+	rc = sfc_ev_qinit(sa, SFC_EVQ_TYPE_MGMT, 0, SFC_MGMT_EVQ_ENTRIES,
+			  sa->socket_id, &sa->mgmt_evq);
+	if (rc != 0)
+		goto fail_mgmt_evq_init;
 
 	/*
 	 * Rx/Tx event queues are created/destroyed when corresponding
@@ -464,35 +901,21 @@ sfc_ev_init(struct sfc_adapter *sa)
 
 	return 0;
 
-fail_ev_qinit_info:
-	while (sw_index-- > 0)
-		sfc_ev_qfini_info(sa, sw_index);
+fail_mgmt_evq_init:
 
-	rte_free(sa->evq_info);
-	sa->evq_info = NULL;
-
-fail_evqs_alloc:
-	sa->evq_count = 0;
+fail_kvarg_perf_profile:
 	sfc_log_init(sa, "failed %d", rc);
 	return rc;
 }
 
 void
-sfc_ev_fini(struct sfc_adapter *sa)
+sfc_ev_detach(struct sfc_adapter *sa)
 {
-	int sw_index;
-
 	sfc_log_init(sa, "entry");
 
-	/* Cleanup all event queues */
-	sw_index = sa->evq_count;
-	while (--sw_index >= 0) {
-		if (sa->evq_info[sw_index].evq != NULL)
-			sfc_ev_qfini(sa, sw_index);
-		sfc_ev_qfini_info(sa, sw_index);
-	}
+	sfc_ev_qfini(sa->mgmt_evq);
 
-	rte_free(sa->evq_info);
-	sa->evq_info = NULL;
-	sa->evq_count = 0;
+	if (sa->evq_count != 0)
+		sfc_err(sa, "%u EvQs are not destroyed before detach",
+			sa->evq_count);
 }