[PATCH v3 1/2] event/dlb2: add support for enqueue reordering

[Abdullah Sevincer <abdullah.sevincer@intel.com>]

DLB devices need events to be enqueued in the same order they are
dequeued. Applications are not suppose to change event order between
dequeue and to enqueue. Since Eventdev standard does not add such
restrictions reorder support is needed for DLB PMD so that it
restores dequeue order on enqueue if applications happen to change
it. It also adds missing releases in places where events are dropped
by the application and it expects implicit release to handle it.

By default the feature will be off on all DLB ports and they will
behave same as older releases. To enable reordering feature,
applications need to add RTE_EVENT_PORT_CFG_RESTORE_DEQ_ORDER flag
to port configuration.

Signed-off-by: Abdullah Sevincer <abdullah.sevincer@intel.com>
---
 doc/guides/rel_notes/release_24_07.rst |   4 +
 drivers/event/dlb2/dlb2.c              | 484 ++++++++++++++++---------
 drivers/event/dlb2/dlb2_avx512.c       |  27 +-
 drivers/event/dlb2/dlb2_inline_fns.h   |   8 +
 drivers/event/dlb2/dlb2_priv.h         |  22 +-
 drivers/event/dlb2/rte_pmd_dlb2.h      |  10 +
 6 files changed, 366 insertions(+), 189 deletions(-)

diff --git a/doc/guides/rel_notes/release_24_07.rst b/doc/guides/rel_notes/release_24_07.rst
index 7c88de381b..1a9a6c2db5 100644
--- a/doc/guides/rel_notes/release_24_07.rst
+++ b/doc/guides/rel_notes/release_24_07.rst
@@ -144,6 +144,10 @@ New Features
 
   Added an API that allows the user to reclaim the defer queue with RCU.
 
+* **Updated DLB2 Driver for enqueue reordering feature**
+  * Added support for DLB reordering feature. Applications should use
+    ``RTE_EVENT_PORT_CFG_RESTORE_DEQ_ORDER`` to enable the feature.
+
 
 Removed Items
 -------------
diff --git a/drivers/event/dlb2/dlb2.c b/drivers/event/dlb2/dlb2.c
index 0b91f03956..13eb75d7b1 100644
--- a/drivers/event/dlb2/dlb2.c
+++ b/drivers/event/dlb2/dlb2.c
@@ -52,6 +52,7 @@
 #if (RTE_EVENT_MAX_QUEUES_PER_DEV > UINT8_MAX)
 #error "RTE_EVENT_MAX_QUEUES_PER_DEV cannot fit in member max_event_queues"
 #endif
+
 static struct rte_event_dev_info evdev_dlb2_default_info = {
 	.driver_name = "", /* probe will set */
 	.min_dequeue_timeout_ns = DLB2_MIN_DEQUEUE_TIMEOUT_NS,
@@ -98,6 +99,11 @@ dlb2_free_qe_mem(struct dlb2_port *qm_port)
 	rte_free(qm_port->qe4);
 	qm_port->qe4 = NULL;
 
+	if (qm_port->order) {
+		rte_free(qm_port->order);
+		qm_port->order = NULL;
+	}
+
 	rte_free(qm_port->int_arm_qe);
 	qm_port->int_arm_qe = NULL;
 
@@ -304,7 +310,7 @@ set_max_cq_depth(const char *key __rte_unused,
 	if (*max_cq_depth < DLB2_MIN_CQ_DEPTH_OVERRIDE ||
 	    *max_cq_depth > DLB2_MAX_CQ_DEPTH_OVERRIDE ||
 	    !rte_is_power_of_2(*max_cq_depth)) {
-		DLB2_LOG_ERR("dlb2: max_cq_depth %d and %d and a power of 2\n",
+		DLB2_LOG_ERR("dlb2: Allowed max_cq_depth range %d - %d and should be power of 2\n",
 			     DLB2_MIN_CQ_DEPTH_OVERRIDE,
 			     DLB2_MAX_CQ_DEPTH_OVERRIDE);
 		return -EINVAL;
@@ -1445,6 +1451,17 @@ dlb2_init_qe_mem(struct dlb2_port *qm_port, char *mz_name)
 		goto error_exit;
 	}
 
+	if (qm_port->reorder_en) {
+		sz = sizeof(struct dlb2_reorder);
+		qm_port->order = rte_zmalloc(mz_name, sz, RTE_CACHE_LINE_SIZE);
+
+		if (qm_port->order == NULL) {
+			DLB2_LOG_ERR("dlb2: no reorder memory\n");
+			ret = -ENOMEM;
+			goto error_exit;
+		}
+	}
+
 	ret = dlb2_init_int_arm_qe(qm_port, mz_name);
 	if (ret < 0) {
 		DLB2_LOG_ERR("dlb2: dlb2_init_int_arm_qe ret=%d\n", ret);
@@ -1541,13 +1558,6 @@ dlb2_hw_create_ldb_port(struct dlb2_eventdev *dlb2,
 		return -EINVAL;
 	}
 
-	if (dlb2->version == DLB2_HW_V2 && ev_port->cq_weight != 0 &&
-	    ev_port->cq_weight > dequeue_depth) {
-		DLB2_LOG_ERR("dlb2: invalid cq dequeue depth %d, must be >= cq weight %d\n",
-			     dequeue_depth, ev_port->cq_weight);
-		return -EINVAL;
-	}
-
 	rte_spinlock_lock(&handle->resource_lock);
 
 	/* We round up to the next power of 2 if necessary */
@@ -1620,9 +1630,6 @@ dlb2_hw_create_ldb_port(struct dlb2_eventdev *dlb2,
 					dlb2_error_strings[cfg.response.  status]);
 			goto error_exit;
 		}
-		qm_port->cq_weight = dequeue_depth;
-	} else {
-		qm_port->cq_weight = 0;
 	}
 
 	/* CQs with depth < 8 use an 8-entry queue, but withhold credits so
@@ -1988,7 +1995,11 @@ dlb2_eventdev_port_setup(struct rte_eventdev *dev,
 			     hw_credit_quanta);
 		return -EINVAL;
 	}
-	ev_port->enq_retries = port_conf->enqueue_depth / sw_credit_quanta;
+	ev_port->enq_retries = port_conf->enqueue_depth;
+
+	ev_port->qm_port.reorder_id = 0;
+	ev_port->qm_port.reorder_en = port_conf->event_port_cfg &
+				      RTE_EVENT_PORT_CFG_RESTORE_DEQ_ORDER;
 
 	/* Save off port config for reconfig */
 	ev_port->conf = *port_conf;
@@ -2792,12 +2803,36 @@ dlb2_check_enqueue_hw_credits(struct dlb2_port *qm_port)
 }
 
 static __rte_always_inline void
-dlb2_pp_write(struct dlb2_enqueue_qe *qe4,
-	      struct process_local_port_data *port_data)
+dlb2_pp_write(struct process_local_port_data *port_data, struct dlb2_enqueue_qe *qe4)
 {
 	dlb2_movdir64b(port_data->pp_addr, qe4);
 }
 
+static __rte_always_inline void
+dlb2_pp_write_reorder(struct process_local_port_data *port_data,
+	      struct dlb2_enqueue_qe *qe4)
+{
+	for (uint8_t i = 0; i < 4; i++) {
+		if (qe4[i].cmd_byte != DLB2_NOOP_CMD_BYTE) {
+			dlb2_movdir64b(port_data->pp_addr, qe4);
+			return;
+		}
+	}
+}
+
+static __rte_always_inline int
+dlb2_pp_check4_write(struct process_local_port_data *port_data,
+	      struct dlb2_enqueue_qe *qe4)
+{
+	for (uint8_t i = 0; i < DLB2_NUM_QES_PER_CACHE_LINE; i++)
+		if (((uint64_t *)&qe4[i])[1] == 0)
+			return 0;
+
+	dlb2_movdir64b(port_data->pp_addr, qe4);
+	memset(qe4, 0, DLB2_NUM_QES_PER_CACHE_LINE * sizeof(struct dlb2_enqueue_qe));
+	return DLB2_NUM_QES_PER_CACHE_LINE;
+}
+
 static inline int
 dlb2_consume_qe_immediate(struct dlb2_port *qm_port, int num)
 {
@@ -2815,7 +2850,8 @@ dlb2_consume_qe_immediate(struct dlb2_port *qm_port, int num)
 	 */
 	port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)];
 
-	dlb2_movntdq_single(port_data->pp_addr, qe);
+	dlb2_movdir64b_single(port_data->pp_addr, qe);
+
 
 	DLB2_LOG_DBG("dlb2: consume immediate - %d QEs\n", num);
 
@@ -2835,7 +2871,7 @@ dlb2_hw_do_enqueue(struct dlb2_port *qm_port,
 	if (do_sfence)
 		rte_wmb();
 
-	dlb2_pp_write(qm_port->qe4, port_data);
+	dlb2_pp_write(port_data, qm_port->qe4);
 }
 
 static inline void
@@ -2986,6 +3022,166 @@ dlb2_event_enqueue_prep(struct dlb2_eventdev_port *ev_port,
 	return 0;
 }
 
+static inline __m128i
+dlb2_event_to_qe(const struct rte_event *ev, uint8_t cmd, uint8_t sched_type, uint8_t qid)
+{
+	__m128i dlb2_to_qe_shuffle = _mm_set_epi8(
+	    0xFF, 0xFF,			 /* zero out cmd word */
+	    1, 0,			 /* low 16-bits of flow id */
+	    0xFF, 0xFF, /* zero QID, sched_type etc fields to be filled later */
+	    3, 2,			 /* top of flow id, event type and subtype */
+	    15, 14, 13, 12, 11, 10, 9, 8 /* data from end of event goes at start */
+	);
+
+	/* event may not be 16 byte aligned. Use 16 byte unaligned load */
+	__m128i tmp = _mm_lddqu_si128((const __m128i *)ev);
+	__m128i qe = _mm_shuffle_epi8(tmp, dlb2_to_qe_shuffle);
+	struct dlb2_enqueue_qe *dq = (struct dlb2_enqueue_qe *)&qe;
+	/* set the cmd field */
+	qe = _mm_insert_epi8(qe, cmd, 15);
+	/* insert missing 16-bits with qid, sched_type and priority */
+	uint16_t qid_stype_prio =
+	    qid | (uint16_t)sched_type << 8 | ((uint16_t)ev->priority & 0xE0) << 5;
+	qe = _mm_insert_epi16(qe, qid_stype_prio, 5);
+	dq->weight = RTE_PMD_DLB2_GET_QE_WEIGHT(ev);
+	return qe;
+}
+
+static inline uint16_t
+__dlb2_event_enqueue_burst_reorder(void *event_port,
+		const struct rte_event events[],
+		uint16_t num,
+		bool use_delayed)
+{
+	struct dlb2_eventdev_port *ev_port = event_port;
+	struct dlb2_port *qm_port = &ev_port->qm_port;
+	struct dlb2_reorder *order = qm_port->order;
+	struct process_local_port_data *port_data;
+	bool is_directed = qm_port->is_directed;
+	uint8_t n = order->next_to_enqueue;
+	uint8_t p_cnt = 0;
+	int retries = ev_port->enq_retries;
+	__m128i new_qes[4], *from;
+	int num_new = 0;
+	int num_tx;
+	int i;
+
+	RTE_ASSERT(ev_port->enq_configured);
+	RTE_ASSERT(events != NULL);
+
+	port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)];
+
+	num_tx = RTE_MIN(num, ev_port->conf.enqueue_depth);
+#if DLB2_BYPASS_FENCE_ON_PP == 1
+	if (!qm_port->is_producer) /* Call memory fense once at the start */
+		rte_wmb();	   /*  calls _mm_sfence() */
+#else
+	rte_wmb(); /*  calls _mm_sfence() */
+#endif
+	for (i = 0; i < num_tx; i++) {
+		uint8_t sched_type = 0;
+		uint8_t reorder_idx = events[i].impl_opaque;
+		int16_t thresh = qm_port->token_pop_thresh;
+		uint8_t qid = 0;
+		int ret;
+
+		while ((ret = dlb2_event_enqueue_prep(ev_port, qm_port, &events[i],
+						      &sched_type, &qid)) != 0 &&
+		       rte_errno == -ENOSPC && --retries > 0)
+			rte_pause();
+
+		if (ret != 0) /* Either there is error or retires exceeded */
+			break;
+
+		switch (events[i].op) {
+		case RTE_EVENT_OP_NEW:
+			new_qes[num_new++] = dlb2_event_to_qe(
+			    &events[i], DLB2_NEW_CMD_BYTE, sched_type, qid);
+			if (num_new == RTE_DIM(new_qes)) {
+				dlb2_pp_write(port_data, (struct dlb2_enqueue_qe *)&new_qes);
+				num_new = 0;
+			}
+			break;
+		case RTE_EVENT_OP_FORWARD: {
+			order->enq_reorder[reorder_idx].m128 = dlb2_event_to_qe(
+			    &events[i], is_directed ? DLB2_NEW_CMD_BYTE : DLB2_FWD_CMD_BYTE,
+			    sched_type, qid);
+			n += dlb2_pp_check4_write(port_data, &order->enq_reorder[n].qe);
+			break;
+		}
+		case RTE_EVENT_OP_RELEASE: {
+			order->enq_reorder[reorder_idx].m128 = dlb2_event_to_qe(
+			    &events[i], is_directed ? DLB2_NOOP_CMD_BYTE : DLB2_COMP_CMD_BYTE,
+			    sched_type, 0xFF);
+			break;
+		}
+		}
+
+		if (use_delayed && qm_port->token_pop_mode == DELAYED_POP &&
+		    (events[i].op == RTE_EVENT_OP_FORWARD ||
+		     events[i].op == RTE_EVENT_OP_RELEASE) &&
+		    qm_port->issued_releases >= thresh - 1) {
+
+			dlb2_consume_qe_immediate(qm_port, qm_port->owed_tokens);
+
+			/* Reset the releases for the next QE batch */
+			qm_port->issued_releases -= thresh;
+
+			/* When using delayed token pop mode, the
+			 * initial token threshold is the full CQ
+			 * depth. After the first token pop, we need to
+			 * reset it to the dequeue_depth.
+			 */
+			qm_port->token_pop_thresh =
+			    qm_port->dequeue_depth;
+		}
+	}
+	while (order->enq_reorder[n].u64[1] != 0) {
+		__m128i tmp[4] = {0}, *send;
+		bool enq;
+
+		if (!p_cnt)
+			from = &order->enq_reorder[n].m128;
+
+		p_cnt++;
+		n++;
+
+		enq = !n || p_cnt == 4 || !order->enq_reorder[n].u64[1];
+		if (!enq)
+			continue;
+
+		if (p_cnt < 4) {
+			memcpy(tmp, from, p_cnt * sizeof(struct dlb2_enqueue_qe));
+			send = tmp;
+		} else {
+			send  = from;
+		}
+
+		if (is_directed)
+			dlb2_pp_write_reorder(port_data, (struct dlb2_enqueue_qe *)send);
+		else
+			dlb2_pp_write(port_data, (struct dlb2_enqueue_qe *)send);
+		memset(from, 0, p_cnt * sizeof(struct dlb2_enqueue_qe));
+		p_cnt = 0;
+	}
+	order->next_to_enqueue = n;
+
+	if (num_new > 0) {
+		switch (num_new) {
+		case 1:
+			new_qes[1] = _mm_setzero_si128(); /* fall-through */
+		case 2:
+			new_qes[2] = _mm_setzero_si128(); /* fall-through */
+		case 3:
+			new_qes[3] = _mm_setzero_si128();
+		}
+		dlb2_pp_write(port_data, (struct dlb2_enqueue_qe *)&new_qes);
+		num_new = 0;
+	}
+
+	return i;
+}
+
 static inline uint16_t
 __dlb2_event_enqueue_burst(void *event_port,
 			   const struct rte_event events[],
@@ -3002,6 +3198,9 @@ __dlb2_event_enqueue_burst(void *event_port,
 	RTE_ASSERT(ev_port->enq_configured);
 	RTE_ASSERT(events != NULL);
 
+	if (qm_port->reorder_en)
+		return __dlb2_event_enqueue_burst_reorder(event_port, events, num, use_delayed);
+
 	i = 0;
 
 	port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)];
@@ -3379,7 +3578,8 @@ dlb2_process_dequeue_qes(struct dlb2_eventdev_port *ev_port,
 		events[num].event_type = qe->u.event_type.major;
 		events[num].sub_event_type = qe->u.event_type.sub;
 		events[num].sched_type = sched_type_map[qe->sched_type];
-		events[num].impl_opaque = qe->qid_depth;
+		events[num].impl_opaque = qm_port->reorder_id++;
+		RTE_PMD_DLB2_SET_QID_DEPTH(&events[num], qe->qid_depth);
 
 		/* qid not preserved for directed queues */
 		if (qm_port->is_directed)
@@ -3414,7 +3614,6 @@ dlb2_process_dequeue_four_qes(struct dlb2_eventdev_port *ev_port,
 	};
 	const int num_events = DLB2_NUM_QES_PER_CACHE_LINE;
 	uint8_t *qid_mappings = qm_port->qid_mappings;
-	__m128i sse_evt[2];
 
 	/* In the unlikely case that any of the QE error bits are set, process
 	 * them one at a time.
@@ -3423,153 +3622,33 @@ dlb2_process_dequeue_four_qes(struct dlb2_eventdev_port *ev_port,
 		     qes[2].error || qes[3].error))
 		return dlb2_process_dequeue_qes(ev_port, qm_port, events,
 						 qes, num_events);
+	const __m128i qe_to_ev_shuffle =
+	    _mm_set_epi8(7, 6, 5, 4, 3, 2, 1, 0, /* last 8-bytes = data from first 8 */
+			 0xFF, 0xFF, 0xFF, 0xFF, /* fill in later as 32-bit value*/
+			 9, 8,			 /* event type and sub-event, + 4 zero bits */
+			 13, 12 /* flow id, 16 bits */);
+	for (int i = 0; i < 4; i++) {
+		const __m128i hw_qe = _mm_load_si128((void *)&qes[i]);
+		const __m128i event = _mm_shuffle_epi8(hw_qe, qe_to_ev_shuffle);
+		/* prepare missing 32-bits for op, sched_type, QID, Priority and
+		 * sequence number in impl_opaque
+		 */
+		const uint16_t qid_sched_prio = _mm_extract_epi16(hw_qe, 5);
+		/* Extract qid_depth and format it as per event header */
+		const uint8_t qid_depth = (_mm_extract_epi8(hw_qe, 15) & 0x6) << 1;
+		const uint32_t qid =  (qm_port->is_directed) ? ev_port->link[0].queue_id :
+					qid_mappings[(uint8_t)qid_sched_prio];
+		const uint32_t sched_type = sched_type_map[(qid_sched_prio >> 8) & 0x3];
+		const uint32_t priority = (qid_sched_prio >> 5) & 0xE0;
 
-	events[0].u64 = qes[0].data;
-	events[1].u64 = qes[1].data;
-	events[2].u64 = qes[2].data;
-	events[3].u64 = qes[3].data;
-
-	/* Construct the metadata portion of two struct rte_events
-	 * in one 128b SSE register. Event metadata is constructed in the SSE
-	 * registers like so:
-	 * sse_evt[0][63:0]:   event[0]'s metadata
-	 * sse_evt[0][127:64]: event[1]'s metadata
-	 * sse_evt[1][63:0]:   event[2]'s metadata
-	 * sse_evt[1][127:64]: event[3]'s metadata
-	 */
-	sse_evt[0] = _mm_setzero_si128();
-	sse_evt[1] = _mm_setzero_si128();
-
-	/* Convert the hardware queue ID to an event queue ID and store it in
-	 * the metadata:
-	 * sse_evt[0][47:40]   = qid_mappings[qes[0].qid]
-	 * sse_evt[0][111:104] = qid_mappings[qes[1].qid]
-	 * sse_evt[1][47:40]   = qid_mappings[qes[2].qid]
-	 * sse_evt[1][111:104] = qid_mappings[qes[3].qid]
-	 */
-#define DLB_EVENT_QUEUE_ID_BYTE 5
-	sse_evt[0] = _mm_insert_epi8(sse_evt[0],
-				     qid_mappings[qes[0].qid],
-				     DLB_EVENT_QUEUE_ID_BYTE);
-	sse_evt[0] = _mm_insert_epi8(sse_evt[0],
-				     qid_mappings[qes[1].qid],
-				     DLB_EVENT_QUEUE_ID_BYTE + 8);
-	sse_evt[1] = _mm_insert_epi8(sse_evt[1],
-				     qid_mappings[qes[2].qid],
-				     DLB_EVENT_QUEUE_ID_BYTE);
-	sse_evt[1] = _mm_insert_epi8(sse_evt[1],
-				     qid_mappings[qes[3].qid],
-				     DLB_EVENT_QUEUE_ID_BYTE + 8);
-
-	/* Convert the hardware priority to an event priority and store it in
-	 * the metadata, while also returning the queue depth status
-	 * value captured by the hardware, storing it in impl_opaque, which can
-	 * be read by the application but not modified
-	 * sse_evt[0][55:48]   = DLB2_TO_EV_PRIO(qes[0].priority)
-	 * sse_evt[0][63:56]   = qes[0].qid_depth
-	 * sse_evt[0][119:112] = DLB2_TO_EV_PRIO(qes[1].priority)
-	 * sse_evt[0][127:120] = qes[1].qid_depth
-	 * sse_evt[1][55:48]   = DLB2_TO_EV_PRIO(qes[2].priority)
-	 * sse_evt[1][63:56]   = qes[2].qid_depth
-	 * sse_evt[1][119:112] = DLB2_TO_EV_PRIO(qes[3].priority)
-	 * sse_evt[1][127:120] = qes[3].qid_depth
-	 */
-#define DLB_EVENT_PRIO_IMPL_OPAQUE_WORD 3
-#define DLB_BYTE_SHIFT 8
-	sse_evt[0] =
-		_mm_insert_epi16(sse_evt[0],
-			DLB2_TO_EV_PRIO((uint8_t)qes[0].priority) |
-			(qes[0].qid_depth << DLB_BYTE_SHIFT),
-			DLB_EVENT_PRIO_IMPL_OPAQUE_WORD);
-	sse_evt[0] =
-		_mm_insert_epi16(sse_evt[0],
-			DLB2_TO_EV_PRIO((uint8_t)qes[1].priority) |
-			(qes[1].qid_depth << DLB_BYTE_SHIFT),
-			DLB_EVENT_PRIO_IMPL_OPAQUE_WORD + 4);
-	sse_evt[1] =
-		_mm_insert_epi16(sse_evt[1],
-			DLB2_TO_EV_PRIO((uint8_t)qes[2].priority) |
-			(qes[2].qid_depth << DLB_BYTE_SHIFT),
-			DLB_EVENT_PRIO_IMPL_OPAQUE_WORD);
-	sse_evt[1] =
-		_mm_insert_epi16(sse_evt[1],
-			DLB2_TO_EV_PRIO((uint8_t)qes[3].priority) |
-			(qes[3].qid_depth << DLB_BYTE_SHIFT),
-			DLB_EVENT_PRIO_IMPL_OPAQUE_WORD + 4);
-
-	/* Write the event type, sub event type, and flow_id to the event
-	 * metadata.
-	 * sse_evt[0][31:0]   = qes[0].flow_id |
-	 *			qes[0].u.event_type.major << 28 |
-	 *			qes[0].u.event_type.sub << 20;
-	 * sse_evt[0][95:64]  = qes[1].flow_id |
-	 *			qes[1].u.event_type.major << 28 |
-	 *			qes[1].u.event_type.sub << 20;
-	 * sse_evt[1][31:0]   = qes[2].flow_id |
-	 *			qes[2].u.event_type.major << 28 |
-	 *			qes[2].u.event_type.sub << 20;
-	 * sse_evt[1][95:64]  = qes[3].flow_id |
-	 *			qes[3].u.event_type.major << 28 |
-	 *			qes[3].u.event_type.sub << 20;
-	 */
-#define DLB_EVENT_EV_TYPE_DW 0
-#define DLB_EVENT_EV_TYPE_SHIFT 28
-#define DLB_EVENT_SUB_EV_TYPE_SHIFT 20
-	sse_evt[0] = _mm_insert_epi32(sse_evt[0],
-			qes[0].flow_id |
-			qes[0].u.event_type.major << DLB_EVENT_EV_TYPE_SHIFT |
-			qes[0].u.event_type.sub <<  DLB_EVENT_SUB_EV_TYPE_SHIFT,
-			DLB_EVENT_EV_TYPE_DW);
-	sse_evt[0] = _mm_insert_epi32(sse_evt[0],
-			qes[1].flow_id |
-			qes[1].u.event_type.major << DLB_EVENT_EV_TYPE_SHIFT |
-			qes[1].u.event_type.sub <<  DLB_EVENT_SUB_EV_TYPE_SHIFT,
-			DLB_EVENT_EV_TYPE_DW + 2);
-	sse_evt[1] = _mm_insert_epi32(sse_evt[1],
-			qes[2].flow_id |
-			qes[2].u.event_type.major << DLB_EVENT_EV_TYPE_SHIFT |
-			qes[2].u.event_type.sub <<  DLB_EVENT_SUB_EV_TYPE_SHIFT,
-			DLB_EVENT_EV_TYPE_DW);
-	sse_evt[1] = _mm_insert_epi32(sse_evt[1],
-			qes[3].flow_id |
-			qes[3].u.event_type.major << DLB_EVENT_EV_TYPE_SHIFT  |
-			qes[3].u.event_type.sub << DLB_EVENT_SUB_EV_TYPE_SHIFT,
-			DLB_EVENT_EV_TYPE_DW + 2);
-
-	/* Write the sched type to the event metadata. 'op' and 'rsvd' are not
-	 * set:
-	 * sse_evt[0][39:32]  = sched_type_map[qes[0].sched_type] << 6
-	 * sse_evt[0][103:96] = sched_type_map[qes[1].sched_type] << 6
-	 * sse_evt[1][39:32]  = sched_type_map[qes[2].sched_type] << 6
-	 * sse_evt[1][103:96] = sched_type_map[qes[3].sched_type] << 6
-	 */
-#define DLB_EVENT_SCHED_TYPE_BYTE 4
-#define DLB_EVENT_SCHED_TYPE_SHIFT 6
-	sse_evt[0] = _mm_insert_epi8(sse_evt[0],
-		sched_type_map[qes[0].sched_type] << DLB_EVENT_SCHED_TYPE_SHIFT,
-		DLB_EVENT_SCHED_TYPE_BYTE);
-	sse_evt[0] = _mm_insert_epi8(sse_evt[0],
-		sched_type_map[qes[1].sched_type] << DLB_EVENT_SCHED_TYPE_SHIFT,
-		DLB_EVENT_SCHED_TYPE_BYTE + 8);
-	sse_evt[1] = _mm_insert_epi8(sse_evt[1],
-		sched_type_map[qes[2].sched_type] << DLB_EVENT_SCHED_TYPE_SHIFT,
-		DLB_EVENT_SCHED_TYPE_BYTE);
-	sse_evt[1] = _mm_insert_epi8(sse_evt[1],
-		sched_type_map[qes[3].sched_type] << DLB_EVENT_SCHED_TYPE_SHIFT,
-		DLB_EVENT_SCHED_TYPE_BYTE + 8);
-
-	/* Store the metadata to the event (use the double-precision
-	 * _mm_storeh_pd because there is no integer function for storing the
-	 * upper 64b):
-	 * events[0].event = sse_evt[0][63:0]
-	 * events[1].event = sse_evt[0][127:64]
-	 * events[2].event = sse_evt[1][63:0]
-	 * events[3].event = sse_evt[1][127:64]
-	 */
-	_mm_storel_epi64((__m128i *)&events[0].event, sse_evt[0]);
-	_mm_storeh_pd((double *)&events[1].event, (__m128d) sse_evt[0]);
-	_mm_storel_epi64((__m128i *)&events[2].event, sse_evt[1]);
-	_mm_storeh_pd((double *)&events[3].event, (__m128d) sse_evt[1]);
+		const uint32_t dword1 = qid_depth |
+		    sched_type << 6 | qid << 8 | priority << 16 | (qm_port->reorder_id + i) << 24;
+
+		/* events[] may not be 16 byte aligned. So use separate load and store */
+		const __m128i tmpEv = _mm_insert_epi32(event, dword1, 1);
+		_mm_storeu_si128((__m128i *) &events[i], tmpEv);
+	}
+	qm_port->reorder_id += 4;
 
 	DLB2_INC_STAT(ev_port->stats.rx_sched_cnt[qes[0].sched_type], 1);
 	DLB2_INC_STAT(ev_port->stats.rx_sched_cnt[qes[1].sched_type], 1);
@@ -3722,6 +3801,15 @@ _process_deq_qes_vec_impl(struct dlb2_port *qm_port,
 			0x00, 0x00, 0x00, 0x03,
 			0x00, 0x00, 0x00, 0x03,
 		};
+
+		static const uint8_t qid_depth_mask[16] = {
+			0x00, 0x00, 0x00, 0x06,
+			0x00, 0x00, 0x00, 0x06,
+			0x00, 0x00, 0x00, 0x06,
+			0x00, 0x00, 0x00, 0x06,
+		};
+		const __m128i v_qid_depth_mask  = _mm_loadu_si128(
+						  (const __m128i *)qid_depth_mask);
 		const __m128i v_sched_map = _mm_loadu_si128(
 					     (const __m128i *)sched_type_map);
 		__m128i v_sched_mask = _mm_loadu_si128(
@@ -3732,6 +3820,9 @@ _process_deq_qes_vec_impl(struct dlb2_port *qm_port,
 		__m128i v_preshift = _mm_and_si128(v_sched_remapped,
 						   v_sched_mask);
 		v_sched_done = _mm_srli_epi32(v_preshift, 10);
+		__m128i v_qid_depth =  _mm_and_si128(v_qe_status, v_qid_depth_mask);
+		v_qid_depth = _mm_srli_epi32(v_qid_depth, 15);
+		v_sched_done = _mm_or_si128(v_sched_done, v_qid_depth);
 	}
 
 	/* Priority handling
@@ -3784,9 +3875,10 @@ _process_deq_qes_vec_impl(struct dlb2_port *qm_port,
 					(const __m128i *)sub_event_mask);
 		__m128i v_flow_mask  = _mm_loadu_si128(
 				       (const __m128i *)flow_mask);
-		__m128i v_sub = _mm_srli_epi32(v_qe_meta, 8);
+		__m128i v_sub = _mm_srli_epi32(v_qe_meta, 4);
 		v_sub = _mm_and_si128(v_sub, v_sub_event_mask);
-		__m128i v_type = _mm_and_si128(v_qe_meta, v_event_mask);
+		__m128i v_type = _mm_srli_epi32(v_qe_meta, 12);
+		v_type = _mm_and_si128(v_type, v_event_mask);
 		v_type = _mm_slli_epi32(v_type, 8);
 		v_types_done = _mm_or_si128(v_type, v_sub);
 		v_types_done = _mm_slli_epi32(v_types_done, 20);
@@ -3814,12 +3906,14 @@ _process_deq_qes_vec_impl(struct dlb2_port *qm_port,
 	case 4:
 		v_ev_3 = _mm_blend_epi16(v_unpk_ev_23, v_qe_3, 0x0F);
 		v_ev_3 = _mm_alignr_epi8(v_ev_3, v_ev_3, 8);
+		v_ev_3 = _mm_insert_epi8(v_ev_3, qm_port->reorder_id + 3, 7);
 		_mm_storeu_si128((__m128i *)&events[3], v_ev_3);
 		DLB2_INC_STAT(qm_port->ev_port->stats.rx_sched_cnt[hw_sched3],
 			      1);
 		/* fallthrough */
 	case 3:
 		v_ev_2 = _mm_unpacklo_epi64(v_unpk_ev_23, v_qe_2);
+		v_ev_2 = _mm_insert_epi8(v_ev_2, qm_port->reorder_id + 2, 7);
 		_mm_storeu_si128((__m128i *)&events[2], v_ev_2);
 		DLB2_INC_STAT(qm_port->ev_port->stats.rx_sched_cnt[hw_sched2],
 			      1);
@@ -3827,16 +3921,19 @@ _process_deq_qes_vec_impl(struct dlb2_port *qm_port,
 	case 2:
 		v_ev_1 = _mm_blend_epi16(v_unpk_ev_01, v_qe_1, 0x0F);
 		v_ev_1 = _mm_alignr_epi8(v_ev_1, v_ev_1, 8);
+		v_ev_1 = _mm_insert_epi8(v_ev_1, qm_port->reorder_id + 1, 7);
 		_mm_storeu_si128((__m128i *)&events[1], v_ev_1);
 		DLB2_INC_STAT(qm_port->ev_port->stats.rx_sched_cnt[hw_sched1],
 			      1);
 		/* fallthrough */
 	case 1:
 		v_ev_0 = _mm_unpacklo_epi64(v_unpk_ev_01, v_qe_0);
+		v_ev_0 = _mm_insert_epi8(v_ev_0, qm_port->reorder_id, 7);
 		_mm_storeu_si128((__m128i *)&events[0], v_ev_0);
 		DLB2_INC_STAT(qm_port->ev_port->stats.rx_sched_cnt[hw_sched0],
 			      1);
 	}
+	qm_port->reorder_id += valid_events;
 }
 
 static __rte_always_inline int
@@ -4171,6 +4268,7 @@ dlb2_event_dequeue_burst(void *event_port, struct rte_event *ev, uint16_t num,
 	struct dlb2_eventdev_port *ev_port = event_port;
 	struct dlb2_port *qm_port = &ev_port->qm_port;
 	struct dlb2_eventdev *dlb2 = ev_port->dlb2;
+	struct dlb2_reorder *order = qm_port->order;
 	uint16_t cnt;
 
 	RTE_ASSERT(ev_port->setup_done);
@@ -4178,8 +4276,21 @@ dlb2_event_dequeue_burst(void *event_port, struct rte_event *ev, uint16_t num,
 
 	if (ev_port->implicit_release && ev_port->outstanding_releases > 0) {
 		uint16_t out_rels = ev_port->outstanding_releases;
-
-		dlb2_event_release(dlb2, ev_port->id, out_rels);
+		if (qm_port->reorder_en) {
+			/* for directed, no-op command-byte = 0, but set dsi field */
+			/* for load-balanced, set COMP */
+			uint64_t release_u64 =
+			    qm_port->is_directed ? 0xFF : (uint64_t)DLB2_COMP_CMD_BYTE << 56;
+
+			for (uint8_t i = order->next_to_enqueue; i != qm_port->reorder_id; i++)
+				if (order->enq_reorder[i].u64[1] == 0)
+					order->enq_reorder[i].u64[1] = release_u64;
+
+			__dlb2_event_enqueue_burst_reorder(event_port, NULL, 0,
+						   qm_port->token_pop_mode == DELAYED_POP);
+		} else {
+			dlb2_event_release(dlb2, ev_port->id, out_rels);
+		}
 
 		DLB2_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels);
 	}
@@ -4208,6 +4319,7 @@ dlb2_event_dequeue_burst_sparse(void *event_port, struct rte_event *ev,
 	struct dlb2_eventdev_port *ev_port = event_port;
 	struct dlb2_port *qm_port = &ev_port->qm_port;
 	struct dlb2_eventdev *dlb2 = ev_port->dlb2;
+	struct dlb2_reorder *order = qm_port->order;
 	uint16_t cnt;
 
 	RTE_ASSERT(ev_port->setup_done);
@@ -4215,9 +4327,35 @@ dlb2_event_dequeue_burst_sparse(void *event_port, struct rte_event *ev,
 
 	if (ev_port->implicit_release && ev_port->outstanding_releases > 0) {
 		uint16_t out_rels = ev_port->outstanding_releases;
+		if (qm_port->reorder_en) {
+			struct rte_event release_burst[8];
+			int num_releases = 0;
+
+			/* go through reorder buffer looking for missing releases. */
+			for (uint8_t i = order->next_to_enqueue; i != qm_port->reorder_id; i++) {
+				if (order->enq_reorder[i].u64[1] == 0) {
+					release_burst[num_releases++] = (struct rte_event){
+						.op = RTE_EVENT_OP_RELEASE,
+							.impl_opaque = i,
+					};
+
+					if (num_releases == RTE_DIM(release_burst)) {
+						__dlb2_event_enqueue_burst_reorder(event_port,
+							release_burst, RTE_DIM(release_burst),
+							qm_port->token_pop_mode == DELAYED_POP);
+						num_releases = 0;
+					}
+				}
+			}
 
-		dlb2_event_release(dlb2, ev_port->id, out_rels);
+			if (num_releases)
+				__dlb2_event_enqueue_burst_reorder(event_port, release_burst
+					, num_releases, qm_port->token_pop_mode == DELAYED_POP);
+		} else {
+			dlb2_event_release(dlb2, ev_port->id, out_rels);
+		}
 
+		RTE_ASSERT(ev_port->outstanding_releases == 0);
 		DLB2_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels);
 	}
 
@@ -4242,6 +4380,8 @@ static void
 dlb2_flush_port(struct rte_eventdev *dev, int port_id)
 {
 	struct dlb2_eventdev *dlb2 = dlb2_pmd_priv(dev);
+	struct dlb2_eventdev_port *ev_port = &dlb2->ev_ports[port_id];
+	struct dlb2_reorder *order = ev_port->qm_port.order;
 	eventdev_stop_flush_t flush;
 	struct rte_event ev;
 	uint8_t dev_id;
@@ -4267,8 +4407,10 @@ dlb2_flush_port(struct rte_eventdev *dev, int port_id)
 	/* Enqueue any additional outstanding releases */
 	ev.op = RTE_EVENT_OP_RELEASE;
 
-	for (i = dlb2->ev_ports[port_id].outstanding_releases; i > 0; i--)
+	for (i = dlb2->ev_ports[port_id].outstanding_releases; i > 0; i--) {
+		ev.impl_opaque = order ? order->next_to_enqueue : 0;
 		rte_event_enqueue_burst(dev_id, port_id, &ev, 1);
+	}
 }
 
 static uint32_t
@@ -4939,6 +5081,8 @@ dlb2_parse_params(const char *params,
 				rte_kvargs_free(kvlist);
 				return ret;
 			}
+			if (version == DLB2_HW_V2 && dlb2_args->enable_cq_weight)
+				DLB2_LOG_INFO("Ignoring 'enable_cq_weight=y'. Only supported for 2.5 HW onwards");
 
 			rte_kvargs_free(kvlist);
 		}
diff --git a/drivers/event/dlb2/dlb2_avx512.c b/drivers/event/dlb2/dlb2_avx512.c
index 3c8906af9d..4f8c490f8c 100644
--- a/drivers/event/dlb2/dlb2_avx512.c
+++ b/drivers/event/dlb2/dlb2_avx512.c
@@ -151,20 +151,20 @@ dlb2_event_build_hcws(struct dlb2_port *qm_port,
 		 */
 #define DLB2_QE_EV_TYPE_WORD 0
 		sse_qe[0] = _mm_insert_epi16(sse_qe[0],
-					     ev[0].sub_event_type << 8 |
-						ev[0].event_type,
+					     ev[0].sub_event_type << 4 |
+						ev[0].event_type << 12,
 					     DLB2_QE_EV_TYPE_WORD);
 		sse_qe[0] = _mm_insert_epi16(sse_qe[0],
-					     ev[1].sub_event_type << 8 |
-						ev[1].event_type,
+					     ev[1].sub_event_type << 4 |
+						ev[1].event_type << 12,
 					     DLB2_QE_EV_TYPE_WORD + 4);
 		sse_qe[1] = _mm_insert_epi16(sse_qe[1],
-					     ev[2].sub_event_type << 8 |
-						ev[2].event_type,
+					     ev[2].sub_event_type << 4 |
+						ev[2].event_type << 12,
 					     DLB2_QE_EV_TYPE_WORD);
 		sse_qe[1] = _mm_insert_epi16(sse_qe[1],
-					     ev[3].sub_event_type << 8 |
-						ev[3].event_type,
+					     ev[3].sub_event_type << 4 |
+						ev[3].event_type << 12,
 					     DLB2_QE_EV_TYPE_WORD + 4);
 
 		if (qm_port->use_avx512) {
@@ -238,11 +238,11 @@ dlb2_event_build_hcws(struct dlb2_port *qm_port,
 		}
 
 			/* will only be set for DLB 2.5 + */
-		if (qm_port->cq_weight) {
-			qe[0].weight = ev[0].impl_opaque & 3;
-			qe[1].weight = ev[1].impl_opaque & 3;
-			qe[2].weight = ev[2].impl_opaque & 3;
-			qe[3].weight = ev[3].impl_opaque & 3;
+		if (qm_port->dlb2->enable_cq_weight) {
+			qe[0].weight = RTE_PMD_DLB2_GET_QE_WEIGHT(&ev[0]);
+			qe[1].weight = RTE_PMD_DLB2_GET_QE_WEIGHT(&ev[1]);
+			qe[2].weight = RTE_PMD_DLB2_GET_QE_WEIGHT(&ev[2]);
+			qe[3].weight = RTE_PMD_DLB2_GET_QE_WEIGHT(&ev[3]);
 		}
 
 		break;
@@ -267,6 +267,7 @@ dlb2_event_build_hcws(struct dlb2_port *qm_port,
 			}
 			qe[i].u.event_type.major = ev[i].event_type;
 			qe[i].u.event_type.sub = ev[i].sub_event_type;
+			qe[i].weight = RTE_PMD_DLB2_GET_QE_WEIGHT(&ev[i]);
 		}
 		break;
 	case 0:
diff --git a/drivers/event/dlb2/dlb2_inline_fns.h b/drivers/event/dlb2/dlb2_inline_fns.h
index 1429281cfd..61a507d159 100644
--- a/drivers/event/dlb2/dlb2_inline_fns.h
+++ b/drivers/event/dlb2/dlb2_inline_fns.h
@@ -32,4 +32,12 @@ dlb2_movdir64b(void *dest, void *src)
 	: "a" (dest), "d" (src));
 }
 
+static inline void
+dlb2_movdir64b_single(void *pp_addr, void *qe4)
+{
+	asm volatile(".byte 0x66, 0x0f, 0x38, 0xf8, 0x02"
+		:
+	: "a" (pp_addr), "d" (qe4));
+}
+
 #endif /* _DLB2_INLINE_FNS_H_ */
diff --git a/drivers/event/dlb2/dlb2_priv.h b/drivers/event/dlb2/dlb2_priv.h
index 2470ae0271..07a6b12f9c 100644
--- a/drivers/event/dlb2/dlb2_priv.h
+++ b/drivers/event/dlb2/dlb2_priv.h
@@ -387,8 +387,23 @@ struct dlb2_port {
 	bool use_scalar; /* force usage of scalar code */
 	uint16_t hw_credit_quanta;
 	bool use_avx512;
-	uint32_t cq_weight;
 	bool is_producer; /* True if port is of type producer */
+	uint8_t reorder_id; /* id used for reordering events coming back into the scheduler */
+	bool reorder_en;
+	struct dlb2_reorder *order; /* For ordering enqueues */
+};
+
+struct dlb2_reorder {
+	/* a reorder buffer for events coming back in different order from dequeue
+	 * We use UINT8_MAX + 1 elements, but add on three no-ops to make movdirs easier at the end
+	 */
+	union {
+		__m128i m128;
+		struct dlb2_enqueue_qe qe;
+		uint64_t u64[2];
+	} enq_reorder[UINT8_MAX + 4];
+	/* id of the next entry in the reorder enqueue ring to send in */
+	uint8_t next_to_enqueue;
 };
 
 /* Per-process per-port mmio and memory pointers */
@@ -642,10 +657,6 @@ struct dlb2_qid_depth_thresholds {
 	int val[DLB2_MAX_NUM_QUEUES_ALL];
 };
 
-struct dlb2_cq_weight {
-	int limit[DLB2_MAX_NUM_PORTS_ALL];
-};
-
 struct dlb2_port_cos {
 	int cos_id[DLB2_MAX_NUM_PORTS_ALL];
 };
@@ -667,7 +678,6 @@ struct dlb2_devargs {
 	bool vector_opts_enabled;
 	int max_cq_depth;
 	int max_enq_depth;
-	struct dlb2_cq_weight cq_weight;
 	struct dlb2_port_cos port_cos;
 	struct dlb2_cos_bw cos_bw;
 	const char *producer_coremask;
diff --git a/drivers/event/dlb2/rte_pmd_dlb2.h b/drivers/event/dlb2/rte_pmd_dlb2.h
index 334c6c356d..7daebfa583 100644
--- a/drivers/event/dlb2/rte_pmd_dlb2.h
+++ b/drivers/event/dlb2/rte_pmd_dlb2.h
@@ -19,6 +19,16 @@ extern "C" {
 
 #include <rte_compat.h>
 
+/**
+ * Macros to get/set QID depth and QE weight from rte_event metadata.
+ * Currently 'rsvd' field is used for these. Lower 2 bits are used to store
+ * QID depth while the upper 2 bits are used for QER weight.
+ */
+#define RTE_PMD_DLB2_GET_QID_DEPTH(x) ((x)->rsvd & 0x3)
+#define RTE_PMD_DLB2_SET_QID_DEPTH(x, v) ((x)->rsvd = ((x)->rsvd & ~0x3) | (v & 0x3))
+#define RTE_PMD_DLB2_GET_QE_WEIGHT(x) (((x)->rsvd >> 2) & 0x3)
+#define RTE_PMD_DLB2_SET_QE_WEIGHT(x, v) ((x)->rsvd = ((x)->rsvd & 0x3) | ((v & 0x3) << 2))
+
 /**
  * @warning
  * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
-- 
2.25.1