[RFC 2/6] qed: Add iSCSI out of order packet handling.

[<manish.rangankar@cavium.com>]

From: Yuval Mintz <Yuval.Mintz@qlogic.com>

This patch adds out of order packet handling for hardware offloaded
iSCSI. Out of order packet handling requires driver buffer allocation
and assistance.

Signed-off-by: Arun Easi <arun.easi@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mintz@cavium.com>
---
 drivers/net/ethernet/qlogic/qed/Makefile   |   2 +-
 drivers/net/ethernet/qlogic/qed/qed.h      |   1 +
 drivers/net/ethernet/qlogic/qed/qed_dev.c  |  14 +-
 drivers/net/ethernet/qlogic/qed/qed_ll2.c  | 559 +++++++++++++++++++++++++++--
 drivers/net/ethernet/qlogic/qed/qed_ll2.h  |   9 +
 drivers/net/ethernet/qlogic/qed/qed_ooo.c  | 510 ++++++++++++++++++++++++++
 drivers/net/ethernet/qlogic/qed/qed_ooo.h  | 116 ++++++
 drivers/net/ethernet/qlogic/qed/qed_roce.c |   1 +
 drivers/net/ethernet/qlogic/qed/qed_spq.c  |   9 +
 9 files changed, 1195 insertions(+), 26 deletions(-)
 create mode 100644 drivers/net/ethernet/qlogic/qed/qed_ooo.c
 create mode 100644 drivers/net/ethernet/qlogic/qed/qed_ooo.h

diff --git a/drivers/net/ethernet/qlogic/qed/Makefile b/drivers/net/ethernet/qlogic/qed/Makefile
index b76669c..9121bf0 100644
--- a/drivers/net/ethernet/qlogic/qed/Makefile
+++ b/drivers/net/ethernet/qlogic/qed/Makefile
@@ -6,4 +6,4 @@ qed-y := qed_cxt.o qed_dev.o qed_hw.o qed_init_fw_funcs.o qed_init_ops.o \
 qed-$(CONFIG_QED_SRIOV) += qed_sriov.o qed_vf.o
 qed-$(CONFIG_QED_LL2) += qed_ll2.o
 qed-$(CONFIG_INFINIBAND_QEDR) += qed_roce.o
-qed-$(CONFIG_QED_ISCSI) += qed_iscsi.o
+qed-$(CONFIG_QED_ISCSI) += qed_iscsi.o qed_ooo.o
diff --git a/drivers/net/ethernet/qlogic/qed/qed.h b/drivers/net/ethernet/qlogic/qed/qed.h
index a61b1c0..e5626ae 100644
--- a/drivers/net/ethernet/qlogic/qed/qed.h
+++ b/drivers/net/ethernet/qlogic/qed/qed.h
@@ -380,6 +380,7 @@ struct qed_hwfn {
 	/* Protocol related */
 	bool				using_ll2;
 	struct qed_ll2_info		*p_ll2_info;
+	struct qed_ooo_info		*p_ooo_info;
 	struct qed_rdma_info		*p_rdma_info;
 	struct qed_iscsi_info		*p_iscsi_info;
 	struct qed_pf_params		pf_params;
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index a4234c0..060e9a4 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -32,6 +32,7 @@
 #include "qed_iscsi.h"
 #include "qed_ll2.h"
 #include "qed_mcp.h"
+#include "qed_ooo.h"
 #include "qed_reg_addr.h"
 #include "qed_sp.h"
 #include "qed_sriov.h"
@@ -157,8 +158,10 @@ void qed_resc_free(struct qed_dev *cdev)
 		qed_ll2_free(p_hwfn, p_hwfn->p_ll2_info);
 #endif
 		if (IS_ENABLED(CONFIG_QEDI) &&
-				p_hwfn->hw_info.personality == QED_PCI_ISCSI)
+				p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			qed_iscsi_free(p_hwfn, p_hwfn->p_iscsi_info);
+			qed_ooo_free(p_hwfn, p_hwfn->p_ooo_info);
+		}
 		qed_iov_free(p_hwfn);
 		qed_dmae_info_free(p_hwfn);
 		qed_dcbx_info_free(p_hwfn, p_hwfn->p_dcbx_info);
@@ -416,6 +419,7 @@ int qed_qm_reconf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 int qed_resc_alloc(struct qed_dev *cdev)
 {
 	struct qed_iscsi_info *p_iscsi_info;
+	struct qed_ooo_info *p_ooo_info;
 #ifdef CONFIG_QED_LL2
 	struct qed_ll2_info *p_ll2_info;
 #endif
@@ -543,6 +547,10 @@ int qed_resc_alloc(struct qed_dev *cdev)
 			if (!p_iscsi_info)
 				goto alloc_no_mem;
 			p_hwfn->p_iscsi_info = p_iscsi_info;
+			p_ooo_info = qed_ooo_alloc(p_hwfn);
+			if (!p_ooo_info)
+				goto alloc_no_mem;
+			p_hwfn->p_ooo_info = p_ooo_info;
 		}
 
 		/* DMA info initialization */
@@ -598,8 +606,10 @@ void qed_resc_setup(struct qed_dev *cdev)
 			qed_ll2_setup(p_hwfn, p_hwfn->p_ll2_info);
 #endif
 		if (IS_ENABLED(CONFIG_QEDI) &&
-				p_hwfn->hw_info.personality == QED_PCI_ISCSI)
+				p_hwfn->hw_info.personality == QED_PCI_ISCSI) {
 			qed_iscsi_setup(p_hwfn, p_hwfn->p_iscsi_info);
+			qed_ooo_setup(p_hwfn, p_hwfn->p_ooo_info);
+		}
 	}
 }
 
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
index e67f3c9..4ce12e9 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
@@ -36,6 +36,7 @@
 #include "qed_int.h"
 #include "qed_ll2.h"
 #include "qed_mcp.h"
+#include "qed_ooo.h"
 #include "qed_reg_addr.h"
 #include "qed_sp.h"
 
@@ -295,27 +296,36 @@ static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 		list_del(&p_pkt->list_entry);
 		b_last_packet = list_empty(&p_tx->active_descq);
 		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
-		p_tx->cur_completing_packet = *p_pkt;
-		p_tx->cur_completing_bd_idx = 1;
-		b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
-		tx_frag = p_pkt->bds_set[0].tx_frag;
+		if (IS_ENABLED(CONFIG_QEDI) &&
+			p_ll2_conn->conn_type == QED_LL2_TYPE_ISCSI_OOO) {
+			struct qed_ooo_buffer *p_buffer;
+
+			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
+			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						p_buffer);
+		} else {
+			p_tx->cur_completing_packet = *p_pkt;
+			p_tx->cur_completing_bd_idx = 1;
+			b_last_frag = p_tx->cur_completing_bd_idx ==
+				p_pkt->bd_used;
+			tx_frag = p_pkt->bds_set[0].tx_frag;
 #if IS_ENABLED(CONFIG_INFINIBAND_QEDR)
-		if (p_ll2_conn->gsi_enable)
-			qed_ll2b_release_tx_gsi_packet(p_hwfn,
-						       p_ll2_conn->my_id,
-						       p_pkt->cookie,
-						       tx_frag,
-						       b_last_frag,
-						       b_last_packet);
-		else
+			if (p_ll2_conn->gsi_enable)
+				qed_ll2b_release_tx_gsi_packet(p_hwfn,
+					       p_ll2_conn->my_id,
+					       p_pkt->cookie,
+					       tx_frag,
+					       b_last_frag,
+					       b_last_packet);
+			else
 #endif
-			qed_ll2b_complete_tx_packet(p_hwfn,
+				qed_ll2b_complete_tx_packet(p_hwfn,
 						    p_ll2_conn->my_id,
 						    p_pkt->cookie,
 						    tx_frag,
 						    b_last_frag,
 						    b_last_packet);
-
+		}
 	}
 }
 
@@ -546,13 +556,466 @@ void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 		list_del(&p_pkt->list_entry);
 		list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 
-		rx_buf_addr = p_pkt->rx_buf_addr;
-		cookie = p_pkt->cookie;
+		if (IS_ENABLED(CONFIG_QEDI) &&
+			p_ll2_conn->conn_type == QED_LL2_TYPE_ISCSI_OOO) {
+			struct qed_ooo_buffer *p_buffer;
+
+			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
+			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						p_buffer);
+		} else {
+			rx_buf_addr = p_pkt->rx_buf_addr;
+			cookie = p_pkt->cookie;
+
+			b_last = list_empty(&p_rx->active_descq);
+		}
+	}
+}
+
+#if IS_ENABLED(CONFIG_QEDI)
+static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags)
+{
+	u8 bd_flags = 0;
+
+	if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST))
+		SET_FIELD(bd_flags, CORE_TX_BD_FLAGS_VLAN_INSERTION, 1);
+
+	return bd_flags;
+}
+
+static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
+{
+	struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
+	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
+	u16 packet_length = 0, parse_flags = 0, vlan = 0;
+	struct qed_ll2_rx_packet *p_pkt = NULL;
+	u32 num_ooo_add_to_peninsula = 0, cid;
+	union core_rx_cqe_union *cqe = NULL;
+	u16 cq_new_idx = 0, cq_old_idx = 0;
+	struct qed_ooo_buffer *p_buffer;
+	struct ooo_opaque *iscsi_ooo;
+	u8 placement_offset = 0;
+	u8 cqe_type;
+	int rc;
+
+	cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
+	cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
+	if (cq_new_idx == cq_old_idx)
+		return 0;
+
+	while (cq_new_idx != cq_old_idx) {
+		struct core_rx_fast_path_cqe *p_cqe_fp;
+
+		cqe = qed_chain_consume(&p_rx->rcq_chain);
+		cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
+		cqe_type = cqe->rx_cqe_sp.type;
+
+		if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
+			DP_NOTICE(p_hwfn,
+				  "Got a non-regular LB LL2 completion [type 0x%02x]\n",
+				  cqe_type);
+			return -EINVAL;
+		}
+		p_cqe_fp = &cqe->rx_cqe_fp;
+
+		placement_offset = p_cqe_fp->placement_offset;
+		parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
+		packet_length = le16_to_cpu(p_cqe_fp->packet_length);
+		vlan = le16_to_cpu(p_cqe_fp->vlan);
+		iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
+		qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
+					   iscsi_ooo);
+		cid = le32_to_cpu(iscsi_ooo->cid);
+
+		/* Process delete isle first */
+		if (iscsi_ooo->drop_size)
+			qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
+					     iscsi_ooo->drop_isle,
+					     iscsi_ooo->drop_size);
+
+		if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
+			continue;
+
+		/* Now process create/add/join isles */
+		if (list_empty(&p_rx->active_descq)) {
+			DP_NOTICE(p_hwfn,
+				  "LL2 OOO RX chain has no submitted buffers\n");
+			return -EIO;
+		}
+
+		p_pkt = list_first_entry(&p_rx->active_descq,
+					 struct qed_ll2_rx_packet, list_entry);
+
+		if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
+		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
+		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
+		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
+		    (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
+			if (!p_pkt) {
+				DP_NOTICE(p_hwfn,
+					  "LL2 OOO RX packet is not valid\n");
+				return -EIO;
+			}
+			list_del(&p_pkt->list_entry);
+			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
+			p_buffer->packet_length = packet_length;
+			p_buffer->parse_flags = parse_flags;
+			p_buffer->vlan = vlan;
+			p_buffer->placement_offset = placement_offset;
+			qed_chain_consume(&p_rx->rxq_chain);
+			list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
+
+			switch (iscsi_ooo->ooo_opcode) {
+			case TCP_EVENT_ADD_NEW_ISLE:
+				qed_ooo_add_new_isle(p_hwfn,
+						     p_hwfn->p_ooo_info,
+						     cid,
+						     iscsi_ooo->ooo_isle,
+						     p_buffer);
+				break;
+			case TCP_EVENT_ADD_ISLE_RIGHT:
+				qed_ooo_add_new_buffer(p_hwfn,
+						       p_hwfn->p_ooo_info,
+						       cid,
+						       iscsi_ooo->ooo_isle,
+						       p_buffer,
+						       QED_OOO_RIGHT_BUF);
+				break;
+			case TCP_EVENT_ADD_ISLE_LEFT:
+				qed_ooo_add_new_buffer(p_hwfn,
+						       p_hwfn->p_ooo_info,
+						       cid,
+						       iscsi_ooo->ooo_isle,
+						       p_buffer,
+						       QED_OOO_LEFT_BUF);
+				break;
+			case TCP_EVENT_JOIN:
+				qed_ooo_add_new_buffer(p_hwfn,
+						       p_hwfn->p_ooo_info,
+						       cid,
+						       iscsi_ooo->ooo_isle +
+						       1,
+						       p_buffer,
+						       QED_OOO_LEFT_BUF);
+				qed_ooo_join_isles(p_hwfn,
+						   p_hwfn->p_ooo_info,
+						   cid, iscsi_ooo->ooo_isle);
+				break;
+			case TCP_EVENT_ADD_PEN:
+				num_ooo_add_to_peninsula++;
+				qed_ooo_put_ready_buffer(p_hwfn,
+							 p_hwfn->p_ooo_info,
+							 p_buffer, true);
+				break;
+			}
+		} else {
+			DP_NOTICE(p_hwfn,
+				  "Unexpected event (%d) TX OOO completion\n",
+				  iscsi_ooo->ooo_opcode);
+		}
+	}
 
-		b_last = list_empty(&p_rx->active_descq);
+	/* Submit RX buffer here */
+	while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
+						   p_hwfn->p_ooo_info))) {
+		rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
+					    p_buffer->rx_buffer_phys_addr,
+					    0, p_buffer, true);
+		if (rc) {
+			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						p_buffer);
+			break;
+		}
 	}
+
+	/* Submit Tx buffers here */
+	while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
+						    p_hwfn->p_ooo_info))) {
+		u16 l4_hdr_offset_w = 0;
+		dma_addr_t first_frag;
+		u8 bd_flags = 0;
+
+		first_frag = p_buffer->rx_buffer_phys_addr +
+			     p_buffer->placement_offset;
+		parse_flags = p_buffer->parse_flags;
+		bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags);
+		SET_FIELD(bd_flags, CORE_TX_BD_FLAGS_FORCE_VLAN_MODE, 1);
+		SET_FIELD(bd_flags, CORE_TX_BD_FLAGS_L4_PROTOCOL, 1);
+
+		rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, 1,
+					       p_buffer->vlan, bd_flags,
+					       l4_hdr_offset_w,
+					       p_ll2_conn->tx_dest, 0,
+					       first_frag,
+					       p_buffer->packet_length,
+					       p_buffer, true);
+		if (rc) {
+			qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						 p_buffer, false);
+			break;
+		}
+	}
+
+	return 0;
 }
 
+static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
+{
+	struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
+	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
+	struct qed_ll2_tx_packet *p_pkt = NULL;
+	struct qed_ooo_buffer *p_buffer;
+	bool b_dont_submit_rx = false;
+	u16 new_idx = 0, num_bds = 0;
+	int rc;
+
+	new_idx = le16_to_cpu(*p_tx->p_fw_cons);
+	num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
+
+	if (!num_bds)
+		return 0;
+
+	while (num_bds) {
+		if (list_empty(&p_tx->active_descq))
+			return -EINVAL;
+
+		p_pkt = list_first_entry(&p_tx->active_descq,
+					 struct qed_ll2_tx_packet, list_entry);
+		if (!p_pkt)
+			return -EINVAL;
+
+		if (p_pkt->bd_used != 1) {
+			DP_NOTICE(p_hwfn,
+				  "Unexpectedly many BDs(%d) in TX OOO completion\n",
+				  p_pkt->bd_used);
+			return -EINVAL;
+		}
+
+		list_del(&p_pkt->list_entry);
+
+		num_bds--;
+		p_tx->bds_idx++;
+		qed_chain_consume(&p_tx->txq_chain);
+
+		p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
+		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
+
+		if (b_dont_submit_rx) {
+			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						p_buffer);
+			continue;
+		}
+
+		rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
+					    p_buffer->rx_buffer_phys_addr, 0,
+					    p_buffer, true);
+		if (rc != 0) {
+			qed_ooo_put_free_buffer(p_hwfn,
+						p_hwfn->p_ooo_info, p_buffer);
+			b_dont_submit_rx = true;
+		}
+	}
+
+	/* Submit Tx buffers here */
+	while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
+						    p_hwfn->p_ooo_info))) {
+		u16 l4_hdr_offset_w = 0, parse_flags = p_buffer->parse_flags;
+		dma_addr_t first_frag;
+		u8 bd_flags = 0;
+
+		first_frag = p_buffer->rx_buffer_phys_addr +
+		    p_buffer->placement_offset;
+		bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags);
+		SET_FIELD(bd_flags, CORE_TX_BD_FLAGS_FORCE_VLAN_MODE, 1);
+		SET_FIELD(bd_flags, CORE_TX_BD_FLAGS_L4_PROTOCOL, 1);
+		rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, 1,
+					       p_buffer->vlan, bd_flags,
+					       l4_hdr_offset_w,
+					       p_ll2_conn->tx_dest, 0,
+					       first_frag,
+					       p_buffer->packet_length,
+					       p_buffer, true);
+		if (rc != 0) {
+			qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
+						 p_buffer, false);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int
+qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
+			       struct qed_ll2_info *p_ll2_info,
+			       u16 rx_num_ooo_buffers, u16 mtu)
+{
+	struct qed_ooo_buffer *p_buf = NULL;
+	void *p_virt;
+	u16 buf_idx;
+	int rc = 0;
+
+	if (p_ll2_info->conn_type != QED_LL2_TYPE_ISCSI_OOO)
+		return rc;
+
+	if (!rx_num_ooo_buffers)
+		return -EINVAL;
+
+	for (buf_idx = 0; buf_idx < rx_num_ooo_buffers; buf_idx++) {
+		p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
+		if (!p_buf) {
+			DP_NOTICE(p_hwfn,
+				  "Failed to allocate ooo descriptor\n");
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
+		p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
+					 ETH_CACHE_LINE_SIZE - 1) &
+					~(ETH_CACHE_LINE_SIZE - 1);
+		p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
+					    p_buf->rx_buffer_size,
+					    &p_buf->rx_buffer_phys_addr,
+					    GFP_KERNEL);
+		if (!p_virt) {
+			DP_NOTICE(p_hwfn, "Failed to allocate ooo buffer\n");
+			kfree(p_buf);
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		p_buf->rx_buffer_virt_addr = p_virt;
+		qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
+	}
+
+	DP_VERBOSE(p_hwfn, QED_MSG_LL2,
+		   "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
+		   rx_num_ooo_buffers, p_buf->rx_buffer_size);
+
+out:
+	return rc;
+}
+
+static void
+qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
+				 struct qed_ll2_info *p_ll2_conn)
+{
+	struct qed_ooo_buffer *p_buffer;
+	int rc;
+
+	if (p_ll2_conn->conn_type != QED_LL2_TYPE_ISCSI_OOO)
+		return;
+
+	qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
+	while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
+						   p_hwfn->p_ooo_info))) {
+		rc = qed_ll2_post_rx_buffer(p_hwfn,
+					    p_ll2_conn->my_id,
+					    p_buffer->rx_buffer_phys_addr,
+					    0, p_buffer, true);
+		if (rc) {
+			qed_ooo_put_free_buffer(p_hwfn,
+						p_hwfn->p_ooo_info, p_buffer);
+			break;
+		}
+	}
+}
+
+static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
+					   struct qed_ll2_info *p_ll2_conn)
+{
+	struct qed_ooo_buffer *p_buffer;
+
+	if (p_ll2_conn->conn_type != QED_LL2_TYPE_ISCSI_OOO)
+		return;
+
+	qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
+	while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
+						   p_hwfn->p_ooo_info))) {
+		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
+				  p_buffer->rx_buffer_size,
+				  p_buffer->rx_buffer_virt_addr,
+				  p_buffer->rx_buffer_phys_addr);
+		kfree(p_buffer);
+	}
+}
+
+static void qed_ll2_stop_ooo(struct qed_dev *cdev)
+{
+	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
+	u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
+
+	DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
+		   *handle);
+
+	qed_ll2_terminate_connection(hwfn, *handle);
+	qed_ll2_release_connection(hwfn, *handle);
+	*handle = QED_LL2_UNUSED_HANDLE;
+}
+
+static int qed_ll2_start_ooo(struct qed_dev *cdev,
+			     struct qed_ll2_params *params)
+{
+	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
+	u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
+	struct qed_ll2_info *ll2_info;
+	int rc;
+
+	ll2_info = kzalloc(sizeof(*ll2_info), GFP_KERNEL);
+	if (!ll2_info) {
+		DP_INFO(cdev, "Failed to allocate LL2 info buffer\n");
+		return -ENOMEM;
+	}
+	ll2_info->conn_type = QED_LL2_TYPE_ISCSI_OOO;
+	ll2_info->mtu = params->mtu;
+	ll2_info->rx_drop_ttl0_flg = params->drop_ttl0_packets;
+	ll2_info->rx_vlan_removal_en = params->rx_vlan_stripping;
+	ll2_info->tx_tc = OOO_LB_TC;
+	ll2_info->tx_dest = CORE_TX_DEST_LB;
+
+	rc = qed_ll2_acquire_connection(hwfn, ll2_info,
+					QED_LL2_RX_SIZE, QED_LL2_TX_SIZE,
+					handle);
+	kfree(ll2_info);
+	if (rc) {
+		DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
+		goto out;
+	}
+
+	rc = qed_ll2_establish_connection(hwfn, *handle);
+	if (rc) {
+		DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	qed_ll2_release_connection(hwfn, *handle);
+out:
+	*handle = QED_LL2_UNUSED_HANDLE;
+	return rc;
+}
+#else /* IS_ENABLED(CONFIG_QEDI) */
+static inline int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn,
+		void *p_cookie) { return -EINVAL; }
+static inline int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn,
+		void *p_cookie) { return -EINVAL; }
+static inline int
+qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
+			struct qed_ll2_info *p_ll2_info,
+			u16 rx_num_ooo_buffers, u16 mtu) { return -EINVAL; }
+static inline void
+qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
+			struct qed_ll2_info *p_ll2_conn) { return; }
+static inline void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
+			struct qed_ll2_info *p_ll2_conn) { return; }
+static inline void qed_ll2_stop_ooo(struct qed_dev *cdev) { return; }
+static inline int qed_ll2_start_ooo(struct qed_dev *cdev,
+			struct qed_ll2_params *params) { return -EINVAL; }
+#endif /* IS_ENABLED(CONFIG_QEDI) */
+
 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 				     struct qed_ll2_info *p_ll2_conn,
 				     u8 action_on_error)
@@ -594,7 +1057,8 @@ static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 	p_ramrod->drop_ttl0_flg = p_ll2_conn->rx_drop_ttl0_flg;
 	p_ramrod->inner_vlan_removal_en = p_ll2_conn->rx_vlan_removal_en;
 	p_ramrod->queue_id = p_ll2_conn->queue_id;
-	p_ramrod->main_func_queue = 1;
+	p_ramrod->main_func_queue = (conn_type == QED_LL2_TYPE_ISCSI_OOO) ? 0
+									  : 1;
 
 	if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
 	    p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) {
@@ -625,6 +1089,11 @@ static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 	if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 		return 0;
 
+	if (p_ll2_conn->conn_type == QED_LL2_TYPE_ISCSI_OOO)
+		p_ll2_conn->tx_stats_en = 0;
+	else
+		p_ll2_conn->tx_stats_en = 1;
+
 	/* Get SPQ entry */
 	memset(&init_data, 0, sizeof(init_data));
 	init_data.cid = p_ll2_conn->cid;
@@ -642,7 +1111,6 @@ static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 	p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 	p_ramrod->sb_index = p_tx->tx_sb_index;
 	p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu);
-	p_ll2_conn->tx_stats_en = 1;
 	p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
 	p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
 
@@ -866,9 +1334,22 @@ int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn,
 	if (rc)
 		goto q_allocate_fail;
 
+	if (IS_ENABLED(CONFIG_QEDI)) {
+		rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
+					    rx_num_desc * 2, p_params->mtu);
+		if (rc)
+			goto q_allocate_fail;
+	}
+
 	/* Register callbacks for the Rx/Tx queues */
-	comp_rx_cb = qed_ll2_rxq_completion;
-	comp_tx_cb = qed_ll2_txq_completion;
+	if (IS_ENABLED(CONFIG_QEDI) &&
+			p_params->conn_type == QED_LL2_TYPE_ISCSI_OOO) {
+		comp_rx_cb = qed_ll2_lb_rxq_completion;
+		comp_tx_cb = qed_ll2_lb_txq_completion;
+	} else {
+		comp_rx_cb = qed_ll2_rxq_completion;
+		comp_tx_cb = qed_ll2_txq_completion;
+	}
 
 	if (rx_num_desc) {
 		qed_int_register_cb(p_hwfn, comp_rx_cb,
@@ -981,6 +1462,9 @@ int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
 	if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE)
 		qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1);
 
+	if (IS_ENABLED(CONFIG_QEDI))
+		qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
+
 	return rc;
 }
 
@@ -1223,6 +1707,7 @@ int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
 			      u16 vlan,
 			      u8 bd_flags,
 			      u16 l4_hdr_offset_w,
+			      enum qed_ll2_tx_dest e_tx_dest,
 			      enum qed_ll2_roce_flavor_type qed_roce_flavor,
 			      dma_addr_t first_frag,
 			      u16 first_frag_len, void *cookie, u8 notify_fw)
@@ -1232,6 +1717,7 @@ int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
 	enum core_roce_flavor_type roce_flavor;
 	struct qed_ll2_tx_queue *p_tx;
 	struct qed_chain *p_tx_chain;
+	enum core_tx_dest tx_dest;
 	unsigned long flags;
 	int rc = 0;
 
@@ -1262,6 +1748,8 @@ int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
 		goto out;
 	}
 
+	tx_dest = e_tx_dest == QED_LL2_TX_DEST_NW ? CORE_TX_DEST_NW :
+						    CORE_TX_DEST_LB;
 	if (qed_roce_flavor == QED_LL2_ROCE) {
 		roce_flavor = CORE_ROCE;
 	} else if (qed_roce_flavor == QED_LL2_RROCE) {
@@ -1276,7 +1764,7 @@ int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
 				      num_of_bds, first_frag,
 				      first_frag_len, cookie, notify_fw);
 	qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp,
-					 num_of_bds, CORE_TX_DEST_NW,
+					 num_of_bds, tx_dest,
 					 vlan, bd_flags, l4_hdr_offset_w,
 					 roce_flavor,
 					 first_frag, first_frag_len);
@@ -1351,6 +1839,10 @@ int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
 		qed_ll2_rxq_flush(p_hwfn, connection_handle);
 	}
 
+	if (IS_ENABLED(CONFIG_QEDI) &&
+			p_ll2_conn->conn_type == QED_LL2_TYPE_ISCSI_OOO)
+		qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
+
 	return rc;
 }
 
@@ -1381,6 +1873,9 @@ void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
 
 	qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
 
+	if (IS_ENABLED(CONFIG_QEDI))
+		qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
+
 	mutex_lock(&p_ll2_conn->mutex);
 	p_ll2_conn->b_active = false;
 	mutex_unlock(&p_ll2_conn->mutex);
@@ -1628,6 +2123,18 @@ static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
 		goto release_terminate;
 	}
 
+	if (IS_ENABLED(CONFIG_QEDI) &&
+		(cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI) &&
+		cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable) {
+		DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
+		rc = qed_ll2_start_ooo(cdev, params);
+		if (rc) {
+			DP_INFO(cdev,
+				"Failed to initialize the OOO LL2 queue\n");
+			goto release_terminate;
+		}
+	}
+
 	p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
 	if (!p_ptt) {
 		DP_INFO(cdev, "Failed to acquire PTT\n");
@@ -1677,6 +2184,11 @@ static int qed_ll2_stop(struct qed_dev *cdev)
 	qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
 	eth_zero_addr(cdev->ll2_mac_address);
 
+	if (IS_ENABLED(CONFIG_QEDI) &&
+		(cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI) &&
+		cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable)
+		qed_ll2_stop_ooo(cdev);
+
 	rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
 					  cdev->ll2->handle);
 	if (rc)
@@ -1731,7 +2243,8 @@ static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
 	rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev),
 				       cdev->ll2->handle,
 				       1 + skb_shinfo(skb)->nr_frags,
-				       vlan, flags, 0, 0 /* RoCE FLAVOR */,
+				       vlan, flags, 0, QED_LL2_TX_DEST_NW,
+				       0 /* RoCE FLAVOR */,
 				       mapping, skb->len, skb, 1);
 	if (rc)
 		goto err;
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.h b/drivers/net/ethernet/qlogic/qed/qed_ll2.h
index 80a5dc2..2b31d30 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.h
@@ -41,6 +41,12 @@ enum qed_ll2_conn_type {
 	MAX_QED_LL2_RX_CONN_TYPE
 };
 
+enum qed_ll2_tx_dest {
+	QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
+	QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
+	QED_LL2_TX_DEST_MAX
+};
+
 struct qed_ll2_rx_packet {
 	struct list_head list_entry;
 	struct core_rx_bd_with_buff_len *rxq_bd;
@@ -192,6 +198,8 @@ int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn,
  * @param l4_hdr_offset_w	L4 Header Offset from start of packet
  *				(in words). This is needed if both l4_csum
  *				and ipv6_ext are set
+ * @param e_tx_dest             indicates if the packet is to be transmitted via
+ *                              loopback or to the network
  * @param first_frag
  * @param first_frag_len
  * @param cookie
@@ -206,6 +214,7 @@ int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
 			      u16 vlan,
 			      u8 bd_flags,
 			      u16 l4_hdr_offset_w,
+			      enum qed_ll2_tx_dest e_tx_dest,
 			      enum qed_ll2_roce_flavor_type qed_roce_flavor,
 			      dma_addr_t first_frag,
 			      u16 first_frag_len, void *cookie, u8 notify_fw);
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ooo.c b/drivers/net/ethernet/qlogic/qed/qed_ooo.c
new file mode 100644
index 0000000..a037a6f
--- /dev/null
+++ b/drivers/net/ethernet/qlogic/qed/qed_ooo.c
@@ -0,0 +1,510 @@
+/* QLogic qed NIC Driver
+ * Copyright (c) 2015 QLogic Corporation
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include "qed.h"
+#include "qed_iscsi.h"
+#include "qed_ll2.h"
+#include "qed_ooo.h"
+
+static struct qed_ooo_archipelago
+*qed_ooo_seek_archipelago(struct qed_hwfn *p_hwfn,
+			  struct qed_ooo_info
+			  *p_ooo_info,
+			  u32 cid)
+{
+	struct qed_ooo_archipelago *p_archipelago = NULL;
+
+	list_for_each_entry(p_archipelago,
+			    &p_ooo_info->archipelagos_list, list_entry) {
+		if (p_archipelago->cid == cid)
+			return p_archipelago;
+	}
+
+	return NULL;
+}
+
+static struct qed_ooo_isle *qed_ooo_seek_isle(struct qed_hwfn *p_hwfn,
+					      struct qed_ooo_info *p_ooo_info,
+					      u32 cid, u8 isle)
+{
+	struct qed_ooo_archipelago *p_archipelago = NULL;
+	struct qed_ooo_isle *p_isle = NULL;
+	u8 the_num_of_isle = 1;
+
+	p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
+	if (!p_archipelago) {
+		DP_NOTICE(p_hwfn,
+			  "Connection %d is not found in OOO list\n", cid);
+		return NULL;
+	}
+
+	list_for_each_entry(p_isle, &p_archipelago->isles_list, list_entry) {
+		if (the_num_of_isle == isle)
+			return p_isle;
+		the_num_of_isle++;
+	}
+
+	return NULL;
+}
+
+void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
+				struct qed_ooo_info *p_ooo_info,
+				struct ooo_opaque *p_cqe)
+{
+	struct qed_ooo_history *p_history = &p_ooo_info->ooo_history;
+
+	if (p_history->head_idx == p_history->num_of_cqes)
+		p_history->head_idx = 0;
+	p_history->p_cqes[p_history->head_idx] = *p_cqe;
+	p_history->head_idx++;
+}
+
+struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn)
+{
+	struct qed_ooo_info *p_ooo_info;
+	u16 max_num_archipelagos = 0;
+	u16 max_num_isles = 0;
+	u32 i;
+
+	if (p_hwfn->hw_info.personality != QED_PCI_ISCSI) {
+		DP_NOTICE(p_hwfn,
+			  "Failed to allocate qed_ooo_info: unknown personality\n");
+		return NULL;
+	}
+
+	max_num_archipelagos = p_hwfn->pf_params.iscsi_pf_params.num_cons;
+	max_num_isles = QED_MAX_NUM_ISLES + max_num_archipelagos;
+
+	if (!max_num_archipelagos) {
+		DP_NOTICE(p_hwfn,
+			  "Failed to allocate qed_ooo_info: unknown amount of connections\n");
+		return NULL;
+	}
+
+	p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
+	if (!p_ooo_info) {
+		DP_NOTICE(p_hwfn, "Failed to allocate qed_ooo_info\n");
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&p_ooo_info->free_buffers_list);
+	INIT_LIST_HEAD(&p_ooo_info->ready_buffers_list);
+	INIT_LIST_HEAD(&p_ooo_info->free_isles_list);
+	INIT_LIST_HEAD(&p_ooo_info->free_archipelagos_list);
+	INIT_LIST_HEAD(&p_ooo_info->archipelagos_list);
+
+	p_ooo_info->p_isles_mem = kcalloc(max_num_isles,
+					  sizeof(struct qed_ooo_isle),
+					  GFP_KERNEL);
+	if (!p_ooo_info->p_isles_mem) {
+		DP_NOTICE(p_hwfn, "Failed to allocate qed_ooo_info(isles)\n");
+		goto no_isles_mem;
+	}
+
+	for (i = 0; i < max_num_isles; i++) {
+		INIT_LIST_HEAD(&p_ooo_info->p_isles_mem[i].buffers_list);
+		list_add_tail(&p_ooo_info->p_isles_mem[i].list_entry,
+			      &p_ooo_info->free_isles_list);
+	}
+
+	p_ooo_info->p_archipelagos_mem =
+				kcalloc(max_num_archipelagos,
+					sizeof(struct qed_ooo_archipelago),
+					GFP_KERNEL);
+	if (!p_ooo_info->p_archipelagos_mem) {
+		DP_NOTICE(p_hwfn,
+			  "Failed to allocate qed_ooo_info(archpelagos)\n");
+		goto no_archipelagos_mem;
+	}
+
+	for (i = 0; i < max_num_archipelagos; i++) {
+		INIT_LIST_HEAD(&p_ooo_info->p_archipelagos_mem[i].isles_list);
+		list_add_tail(&p_ooo_info->p_archipelagos_mem[i].list_entry,
+			      &p_ooo_info->free_archipelagos_list);
+	}
+
+	p_ooo_info->ooo_history.p_cqes =
+				kcalloc(QED_MAX_NUM_OOO_HISTORY_ENTRIES,
+					sizeof(struct ooo_opaque),
+					GFP_KERNEL);
+	if (!p_ooo_info->ooo_history.p_cqes) {
+		DP_NOTICE(p_hwfn, "Failed to allocate qed_ooo_info(history)\n");
+		goto no_history_mem;
+	}
+
+	return p_ooo_info;
+
+no_history_mem:
+	kfree(p_ooo_info->p_archipelagos_mem);
+no_archipelagos_mem:
+	kfree(p_ooo_info->p_isles_mem);
+no_isles_mem:
+	kfree(p_ooo_info);
+	return NULL;
+}
+
+void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
+				      struct qed_ooo_info *p_ooo_info, u32 cid)
+{
+	struct qed_ooo_archipelago *p_archipelago;
+	struct qed_ooo_buffer *p_buffer;
+	struct qed_ooo_isle *p_isle;
+	bool b_found = false;
+
+	if (list_empty(&p_ooo_info->archipelagos_list))
+		return;
+
+	list_for_each_entry(p_archipelago,
+			    &p_ooo_info->archipelagos_list, list_entry) {
+		if (p_archipelago->cid == cid) {
+			list_del(&p_archipelago->list_entry);
+			b_found = true;
+			break;
+		}
+	}
+
+	if (!b_found)
+		return;
+
+	while (!list_empty(&p_archipelago->isles_list)) {
+		p_isle = list_first_entry(&p_archipelago->isles_list,
+					  struct qed_ooo_isle, list_entry);
+
+		list_del(&p_isle->list_entry);
+
+		while (!list_empty(&p_isle->buffers_list)) {
+			p_buffer = list_first_entry(&p_isle->buffers_list,
+						    struct qed_ooo_buffer,
+						    list_entry);
+
+			if (!p_buffer)
+				break;
+
+			list_del(&p_buffer->list_entry);
+			list_add_tail(&p_buffer->list_entry,
+				      &p_ooo_info->free_buffers_list);
+		}
+		list_add_tail(&p_isle->list_entry,
+			      &p_ooo_info->free_isles_list);
+	}
+
+	list_add_tail(&p_archipelago->list_entry,
+		      &p_ooo_info->free_archipelagos_list);
+}
+
+void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
+			       struct qed_ooo_info *p_ooo_info)
+{
+	struct qed_ooo_archipelago *p_arch;
+	struct qed_ooo_buffer *p_buffer;
+	struct qed_ooo_isle *p_isle;
+
+	while (!list_empty(&p_ooo_info->archipelagos_list)) {
+		p_arch = list_first_entry(&p_ooo_info->archipelagos_list,
+					  struct qed_ooo_archipelago,
+					  list_entry);
+
+		list_del(&p_arch->list_entry);
+
+		while (!list_empty(&p_arch->isles_list)) {
+			p_isle = list_first_entry(&p_arch->isles_list,
+						  struct qed_ooo_isle,
+						  list_entry);
+
+			list_del(&p_isle->list_entry);
+
+			while (!list_empty(&p_isle->buffers_list)) {
+				p_buffer =
+				    list_first_entry(&p_isle->buffers_list,
+						     struct qed_ooo_buffer,
+						     list_entry);
+
+				if (!p_buffer)
+					break;
+
+			list_del(&p_buffer->list_entry);
+				list_add_tail(&p_buffer->list_entry,
+					      &p_ooo_info->free_buffers_list);
+			}
+			list_add_tail(&p_isle->list_entry,
+				      &p_ooo_info->free_isles_list);
+		}
+		list_add_tail(&p_arch->list_entry,
+			      &p_ooo_info->free_archipelagos_list);
+	}
+	if (!list_empty(&p_ooo_info->ready_buffers_list))
+		list_splice_tail_init(&p_ooo_info->ready_buffers_list,
+				      &p_ooo_info->free_buffers_list);
+}
+
+void qed_ooo_setup(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info)
+{
+	qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
+	memset(p_ooo_info->ooo_history.p_cqes, 0,
+	       p_ooo_info->ooo_history.num_of_cqes *
+	       sizeof(struct ooo_opaque));
+	p_ooo_info->ooo_history.head_idx = 0;
+}
+
+void qed_ooo_free(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info)
+{
+	struct qed_ooo_buffer *p_buffer;
+
+	qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
+	while (!list_empty(&p_ooo_info->free_buffers_list)) {
+		p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
+					    struct qed_ooo_buffer, list_entry);
+
+		if (!p_buffer)
+			break;
+
+		list_del(&p_buffer->list_entry);
+		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
+				  p_buffer->rx_buffer_size,
+				  p_buffer->rx_buffer_virt_addr,
+				  p_buffer->rx_buffer_phys_addr);
+		kfree(p_buffer);
+	}
+
+	kfree(p_ooo_info->p_isles_mem);
+	kfree(p_ooo_info->p_archipelagos_mem);
+	kfree(p_ooo_info->ooo_history.p_cqes);
+	kfree(p_ooo_info);
+}
+
+void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
+			     struct qed_ooo_info *p_ooo_info,
+			     struct qed_ooo_buffer *p_buffer)
+{
+	list_add_tail(&p_buffer->list_entry, &p_ooo_info->free_buffers_list);
+}
+
+struct qed_ooo_buffer *qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
+					       struct qed_ooo_info *p_ooo_info)
+{
+	struct qed_ooo_buffer *p_buffer = NULL;
+
+	if (!list_empty(&p_ooo_info->free_buffers_list)) {
+		p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
+					    struct qed_ooo_buffer, list_entry);
+
+		list_del(&p_buffer->list_entry);
+	}
+
+	return p_buffer;
+}
+
+void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
+			      struct qed_ooo_info *p_ooo_info,
+			      struct qed_ooo_buffer *p_buffer, u8 on_tail)
+{
+	if (on_tail)
+		list_add_tail(&p_buffer->list_entry,
+			      &p_ooo_info->ready_buffers_list);
+	else
+		list_add(&p_buffer->list_entry,
+			 &p_ooo_info->ready_buffers_list);
+}
+
+struct qed_ooo_buffer *qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
+						struct qed_ooo_info *p_ooo_info)
+{
+	struct qed_ooo_buffer *p_buffer = NULL;
+
+	if (!list_empty(&p_ooo_info->ready_buffers_list)) {
+		p_buffer = list_first_entry(&p_ooo_info->ready_buffers_list,
+					    struct qed_ooo_buffer, list_entry);
+
+		list_del(&p_buffer->list_entry);
+	}
+
+	return p_buffer;
+}
+
+void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
+			  struct qed_ooo_info *p_ooo_info,
+			  u32 cid, u8 drop_isle, u8 drop_size)
+{
+	struct qed_ooo_archipelago *p_archipelago = NULL;
+	struct qed_ooo_isle *p_isle = NULL;
+	u8 isle_idx;
+
+	p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
+	for (isle_idx = 0; isle_idx < drop_size; isle_idx++) {
+		p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, drop_isle);
+		if (!p_isle) {
+			DP_NOTICE(p_hwfn,
+				  "Isle %d is not found(cid %d)\n",
+				  drop_isle, cid);
+			return;
+		}
+		if (list_empty(&p_isle->buffers_list))
+			DP_NOTICE(p_hwfn,
+				  "Isle %d is empty(cid %d)\n", drop_isle, cid);
+		else
+			list_splice_tail_init(&p_isle->buffers_list,
+					      &p_ooo_info->free_buffers_list);
+
+		list_del(&p_isle->list_entry);
+		p_ooo_info->cur_isles_number--;
+		list_add(&p_isle->list_entry, &p_ooo_info->free_isles_list);
+	}
+
+	if (list_empty(&p_archipelago->isles_list)) {
+		list_del(&p_archipelago->list_entry);
+		list_add(&p_archipelago->list_entry,
+			 &p_ooo_info->free_archipelagos_list);
+	}
+}
+
+void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
+			  struct qed_ooo_info *p_ooo_info,
+			  u32 cid, u8 ooo_isle,
+			  struct qed_ooo_buffer *p_buffer)
+{
+	struct qed_ooo_archipelago *p_archipelago = NULL;
+	struct qed_ooo_isle *p_prev_isle = NULL;
+	struct qed_ooo_isle *p_isle = NULL;
+
+	if (ooo_isle > 1) {
+		p_prev_isle = qed_ooo_seek_isle(p_hwfn,
+						p_ooo_info, cid, ooo_isle - 1);
+		if (!p_prev_isle) {
+			DP_NOTICE(p_hwfn,
+				  "Isle %d is not found(cid %d)\n",
+				  ooo_isle - 1, cid);
+			return;
+		}
+	}
+	p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
+	if (!p_archipelago && (ooo_isle != 1)) {
+		DP_NOTICE(p_hwfn,
+			  "Connection %d is not found in OOO list\n", cid);
+		return;
+	}
+
+	if (!list_empty(&p_ooo_info->free_isles_list)) {
+		p_isle = list_first_entry(&p_ooo_info->free_isles_list,
+					  struct qed_ooo_isle, list_entry);
+
+		list_del(&p_isle->list_entry);
+		if (!list_empty(&p_isle->buffers_list)) {
+			DP_NOTICE(p_hwfn, "Free isle is not empty\n");
+			INIT_LIST_HEAD(&p_isle->buffers_list);
+		}
+	} else {
+		DP_NOTICE(p_hwfn, "No more free isles\n");
+		return;
+	}
+
+	if (!p_archipelago &&
+	    !list_empty(&p_ooo_info->free_archipelagos_list)) {
+		p_archipelago =
+		    list_first_entry(&p_ooo_info->free_archipelagos_list,
+				     struct qed_ooo_archipelago, list_entry);
+
+		list_del(&p_archipelago->list_entry);
+		if (!list_empty(&p_archipelago->isles_list)) {
+			DP_NOTICE(p_hwfn,
+				  "Free OOO connection is not empty\n");
+			INIT_LIST_HEAD(&p_archipelago->isles_list);
+		}
+		p_archipelago->cid = cid;
+		list_add(&p_archipelago->list_entry,
+			 &p_ooo_info->archipelagos_list);
+	} else if (!p_archipelago) {
+		DP_NOTICE(p_hwfn, "No more free OOO connections\n");
+		list_add(&p_isle->list_entry,
+			 &p_ooo_info->free_isles_list);
+		list_add(&p_buffer->list_entry,
+			 &p_ooo_info->free_buffers_list);
+		return;
+	}
+
+	list_add(&p_buffer->list_entry, &p_isle->buffers_list);
+	p_ooo_info->cur_isles_number++;
+	p_ooo_info->gen_isles_number++;
+
+	if (p_ooo_info->cur_isles_number > p_ooo_info->max_isles_number)
+		p_ooo_info->max_isles_number = p_ooo_info->cur_isles_number;
+
+	if (!p_prev_isle)
+		list_add(&p_isle->list_entry, &p_archipelago->isles_list);
+	else
+		list_add(&p_isle->list_entry, &p_prev_isle->list_entry);
+}
+
+void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
+			    struct qed_ooo_info *p_ooo_info,
+			    u32 cid,
+			    u8 ooo_isle,
+			    struct qed_ooo_buffer *p_buffer, u8 buffer_side)
+{
+	struct qed_ooo_isle *p_isle = NULL;
+
+	p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, ooo_isle);
+	if (!p_isle) {
+		DP_NOTICE(p_hwfn,
+			  "Isle %d is not found(cid %d)\n", ooo_isle, cid);
+		return;
+	}
+
+	if (buffer_side == QED_OOO_LEFT_BUF)
+		list_add(&p_buffer->list_entry, &p_isle->buffers_list);
+	else
+		list_add_tail(&p_buffer->list_entry, &p_isle->buffers_list);
+}
+
+void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
+			struct qed_ooo_info *p_ooo_info, u32 cid, u8 left_isle)
+{
+	struct qed_ooo_archipelago *p_archipelago = NULL;
+	struct qed_ooo_isle *p_right_isle = NULL;
+	struct qed_ooo_isle *p_left_isle = NULL;
+
+	p_right_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
+					 left_isle + 1);
+	if (!p_right_isle) {
+		DP_NOTICE(p_hwfn,
+			  "Right isle %d is not found(cid %d)\n",
+			  left_isle + 1, cid);
+		return;
+	}
+
+	p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
+	list_del(&p_right_isle->list_entry);
+	p_ooo_info->cur_isles_number--;
+	if (left_isle) {
+		p_left_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
+						left_isle);
+		if (!p_left_isle) {
+			DP_NOTICE(p_hwfn,
+				  "Left isle %d is not found(cid %d)\n",
+				  left_isle, cid);
+			return;
+		}
+		list_splice_tail_init(&p_right_isle->buffers_list,
+				      &p_left_isle->buffers_list);
+	} else {
+		list_splice_tail_init(&p_right_isle->buffers_list,
+				      &p_ooo_info->ready_buffers_list);
+		if (list_empty(&p_archipelago->isles_list)) {
+			list_del(&p_archipelago->list_entry);
+			list_add(&p_archipelago->list_entry,
+				 &p_ooo_info->free_archipelagos_list);
+		}
+	}
+	list_add_tail(&p_right_isle->list_entry, &p_ooo_info->free_isles_list);
+}
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ooo.h b/drivers/net/ethernet/qlogic/qed/qed_ooo.h
new file mode 100644
index 0000000..75c6e48
--- /dev/null
+++ b/drivers/net/ethernet/qlogic/qed/qed_ooo.h
@@ -0,0 +1,116 @@
+/* QLogic qed NIC Driver
+ * Copyright (c) 2015 QLogic Corporation
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QED_OOO_H
+#define _QED_OOO_H
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include "qed.h"
+
+#define QED_MAX_NUM_ISLES	256
+#define QED_MAX_NUM_OOO_HISTORY_ENTRIES	512
+
+#define QED_OOO_LEFT_BUF	0
+#define QED_OOO_RIGHT_BUF	1
+
+struct qed_ooo_buffer {
+	struct list_head list_entry;
+	void *rx_buffer_virt_addr;
+	dma_addr_t rx_buffer_phys_addr;
+	u32 rx_buffer_size;
+	u16 packet_length;
+	u16 parse_flags;
+	u16 vlan;
+	u8 placement_offset;
+};
+
+struct qed_ooo_isle {
+	struct list_head list_entry;
+	struct list_head buffers_list;
+};
+
+struct qed_ooo_archipelago {
+	struct list_head list_entry;
+	struct list_head isles_list;
+	u32 cid;
+};
+
+struct qed_ooo_history {
+	struct ooo_opaque *p_cqes;
+	u32 head_idx;
+	u32 num_of_cqes;
+};
+
+struct qed_ooo_info {
+	struct list_head free_buffers_list;
+	struct list_head ready_buffers_list;
+	struct list_head free_isles_list;
+	struct list_head free_archipelagos_list;
+	struct list_head archipelagos_list;
+	struct qed_ooo_archipelago *p_archipelagos_mem;
+	struct qed_ooo_isle *p_isles_mem;
+	struct qed_ooo_history ooo_history;
+	u32 cur_isles_number;
+	u32 max_isles_number;
+	u32 gen_isles_number;
+};
+
+void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
+				struct qed_ooo_info *p_ooo_info,
+				struct ooo_opaque *p_cqe);
+
+struct qed_ooo_info *qed_ooo_alloc(struct qed_hwfn *p_hwfn);
+
+void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
+				      struct qed_ooo_info *p_ooo_info,
+				      u32 cid);
+
+void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
+			       struct qed_ooo_info *p_ooo_info);
+
+void qed_ooo_setup(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info);
+
+void qed_ooo_free(struct qed_hwfn *p_hwfn, struct qed_ooo_info *p_ooo_info);
+
+void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
+			     struct qed_ooo_info *p_ooo_info,
+			     struct qed_ooo_buffer *p_buffer);
+
+struct qed_ooo_buffer *
+qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
+			struct qed_ooo_info *p_ooo_info);
+
+void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
+			      struct qed_ooo_info *p_ooo_info,
+			      struct qed_ooo_buffer *p_buffer, u8 on_tail);
+
+struct qed_ooo_buffer *
+qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
+			 struct qed_ooo_info *p_ooo_info);
+
+void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
+			  struct qed_ooo_info *p_ooo_info,
+			  u32 cid, u8 drop_isle, u8 drop_size);
+
+void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
+			  struct qed_ooo_info *p_ooo_info,
+			  u32 cid,
+			  u8 ooo_isle, struct qed_ooo_buffer *p_buffer);
+
+void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
+			    struct qed_ooo_info *p_ooo_info,
+			    u32 cid,
+			    u8 ooo_isle,
+			    struct qed_ooo_buffer *p_buffer, u8 buffer_side);
+
+void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
+			struct qed_ooo_info *p_ooo_info, u32 cid,
+			u8 left_isle);
+
+#endif
diff --git a/drivers/net/ethernet/qlogic/qed/qed_roce.c b/drivers/net/ethernet/qlogic/qed/qed_roce.c
index 2343005..1768cdb 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_roce.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_roce.c
@@ -2866,6 +2866,7 @@ static int qed_roce_ll2_tx(struct qed_dev *cdev,
 	/* Tx header */
 	rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev), roce_ll2->handle,
 				       1 + pkt->n_seg, 0, flags, 0,
+				       QED_LL2_TX_DEST_NW,
 				       qed_roce_flavor, pkt->header.baddr,
 				       pkt->header.len, pkt, 1);
 	if (rc) {
diff --git a/drivers/net/ethernet/qlogic/qed/qed_spq.c b/drivers/net/ethernet/qlogic/qed/qed_spq.c
index d3fa578..b44fd4c 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_spq.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_spq.c
@@ -26,6 +26,7 @@
 #include "qed_int.h"
 #include "qed_iscsi.h"
 #include "qed_mcp.h"
+#include "qed_ooo.h"
 #include "qed_reg_addr.h"
 #include "qed_sp.h"
 #include "qed_sriov.h"
@@ -253,6 +254,14 @@ static int qed_spq_hw_post(struct qed_hwfn *p_hwfn,
 	case PROTOCOLID_ISCSI:
 		if (!IS_ENABLED(CONFIG_QEDI))
 			return -EINVAL;
+		if (p_eqe->opcode == ISCSI_EVENT_TYPE_ASYN_DELETE_OOO_ISLES) {
+			u32 cid = le32_to_cpu(p_eqe->data.iscsi_info.cid);
+
+			qed_ooo_release_connection_isles(p_hwfn,
+							 p_hwfn->p_ooo_info,
+							 cid);
+			return 0;
+		}
 
 		if (p_hwfn->p_iscsi_info->event_cb) {
 			struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info;
-- 
1.8.3.1