/*
 * Copyright (c) 2018-2019 Cavium, Inc.
 * All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * File : ecore_ll2.c
 */
#include <sys/cdefs.h>
#include "bcm_osal.h"

#include "ecore.h"
#include "ecore_status.h"
#include "ecore_ll2.h"
#include "reg_addr.h"
#include "ecore_int.h"
#include "ecore_cxt.h"
#include "ecore_sp_commands.h"
#include "ecore_hw.h"
#include "reg_addr.h"
#include "ecore_dev_api.h"
#include "ecore_iro.h"
#include "ecore_gtt_reg_addr.h"
#include "ecore_ooo.h"
#include "ecore_hw.h"
#include "ecore_mcp.h"

#define ECORE_LL2_RX_REGISTERED(ll2)    ((ll2)->rx_queue.b_cb_registred)
#define ECORE_LL2_TX_REGISTERED(ll2)    ((ll2)->tx_queue.b_cb_registred)

#ifdef _NTDDK_
#pragma warning(push)
#pragma warning(disable : 28167)
#pragma warning(disable : 28123)
#pragma warning(disable : 28121)
#endif

static struct ecore_ll2_info *
__ecore_ll2_handle_sanity(struct ecore_hwfn *p_hwfn,
                          u8 connection_handle,
                          bool b_lock, bool b_only_active)
{
        struct ecore_ll2_info *p_ll2_conn, *p_ret = OSAL_NULL;

        if (connection_handle >= ECORE_MAX_NUM_OF_LL2_CONNECTIONS)
                return OSAL_NULL;

        if (!p_hwfn->p_ll2_info)
                return OSAL_NULL;

        /* TODO - is there really need for the locked vs. unlocked
         * variant? I simply used what was already there.
         */
        p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];

        if (b_only_active) {
                if (b_lock)
                        OSAL_MUTEX_ACQUIRE(&p_ll2_conn->mutex);
                if (p_ll2_conn->b_active)
                        p_ret = p_ll2_conn;
                if (b_lock)
                        OSAL_MUTEX_RELEASE(&p_ll2_conn->mutex);
        } else {
                p_ret = p_ll2_conn;
        }

        return p_ret;
}

static struct ecore_ll2_info *
ecore_ll2_handle_sanity(struct ecore_hwfn *p_hwfn,
                        u8 connection_handle)
{
        return __ecore_ll2_handle_sanity(p_hwfn, connection_handle,
                                         false, true);
}

static struct ecore_ll2_info *
ecore_ll2_handle_sanity_lock(struct ecore_hwfn *p_hwfn,
                             u8 connection_handle)
{
        return __ecore_ll2_handle_sanity(p_hwfn, connection_handle,
                                         true, true);
}

static struct ecore_ll2_info *
ecore_ll2_handle_sanity_inactive(struct ecore_hwfn *p_hwfn,
                                 u8 connection_handle)
{
        return __ecore_ll2_handle_sanity(p_hwfn, connection_handle,
                                         false, false);
}

#ifndef LINUX_REMOVE
/* TODO - is this really been used by anyone? Is it a on future todo list? */
enum _ecore_status_t
ecore_ll2_get_fragment_of_tx_packet(struct ecore_hwfn *p_hwfn,
                                    u8 connection_handle,
                                    dma_addr_t *p_addr,
                                    bool *b_last_fragment)
{
        struct ecore_ll2_tx_packet *p_pkt;
        struct ecore_ll2_info *p_ll2_conn;
        u16 cur_frag_idx = 0;

        p_ll2_conn = ecore_ll2_handle_sanity(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return ECORE_INVAL;
        p_pkt = &p_ll2_conn->tx_queue.cur_completing_packet;

        if (!p_ll2_conn->tx_queue.b_completing_packet || !p_addr)
                return ECORE_INVAL;

        if (p_ll2_conn->tx_queue.cur_completing_bd_idx == p_pkt->bd_used)
                return ECORE_INVAL;

        /* Packet is available and has at least one more frag - provide it */
        cur_frag_idx = p_ll2_conn->tx_queue.cur_completing_bd_idx++;
        *p_addr = p_pkt->bds_set[cur_frag_idx].tx_frag;
        if (b_last_fragment)
                *b_last_fragment = p_pkt->bd_used ==
                                   p_ll2_conn->tx_queue.cur_completing_bd_idx;

        return ECORE_SUCCESS;
}
#endif

static void ecore_ll2_txq_flush(struct ecore_hwfn *p_hwfn,
                                u8 connection_handle)
{
        bool b_last_packet = false, b_last_frag = false;
        struct ecore_ll2_tx_packet *p_pkt = OSAL_NULL;
        struct ecore_ll2_info *p_ll2_conn;
        struct ecore_ll2_tx_queue *p_tx;
        unsigned long flags = 0;
        dma_addr_t tx_frag;

        p_ll2_conn = ecore_ll2_handle_sanity_inactive(p_hwfn,
                                                      connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return;
        p_tx = &p_ll2_conn->tx_queue;

        OSAL_SPIN_LOCK_IRQSAVE(&p_tx->lock, flags);
        while (!OSAL_LIST_IS_EMPTY(&p_tx->active_descq)) {
                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_tx->active_descq,
                                              struct ecore_ll2_tx_packet,
                                              list_entry);

                if (p_pkt == OSAL_NULL)
                        break;

#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                       &p_tx->active_descq);
                b_last_packet = OSAL_LIST_IS_EMPTY(&p_tx->active_descq);
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                    &p_tx->free_descq);
                OSAL_SPIN_UNLOCK_IRQSAVE(&p_tx->lock, flags);
                if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_OOO) {
                        struct ecore_ooo_buffer *p_buffer;

                        p_buffer = (struct ecore_ooo_buffer *)p_pkt->cookie;
                        ecore_ooo_put_free_buffer(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;
                        p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
                                                      p_ll2_conn->my_id,
                                                      p_pkt->cookie,
                                                      tx_frag,
                                                      b_last_frag,
                                                      b_last_packet);
                }
                OSAL_SPIN_LOCK_IRQSAVE(&p_tx->lock, flags);
        }
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_tx->lock, flags);
}

static enum _ecore_status_t
ecore_ll2_txq_completion(struct ecore_hwfn *p_hwfn,
                         void *p_cookie)
{
        struct ecore_ll2_info *p_ll2_conn = (struct ecore_ll2_info*)p_cookie;
        struct ecore_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
        u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
        struct ecore_ll2_tx_packet *p_pkt;
        bool b_last_frag = false;
        unsigned long flags;
        enum _ecore_status_t rc = ECORE_INVAL;

        OSAL_SPIN_LOCK_IRQSAVE(&p_tx->lock, flags);
        if (p_tx->b_completing_packet) {
                /* TODO - this looks completely unnecessary to me - the only
                 * way we can re-enter is by the DPC calling us again, but this
                 * would only happen AFTER we return, and we unset this at end
                 * of the function.
                 */
                rc = ECORE_BUSY;
                goto out;
        }

        new_idx = OSAL_LE16_TO_CPU(*p_tx->p_fw_cons);
        num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
        while (num_bds) {
                if (OSAL_LIST_IS_EMPTY(&p_tx->active_descq))
                        goto out;

                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_tx->active_descq,
                                              struct ecore_ll2_tx_packet,
                                              list_entry);
                if (!p_pkt)
                        goto out;

                p_tx->b_completing_packet = true;
                p_tx->cur_completing_packet = *p_pkt;
                num_bds_in_packet = p_pkt->bd_used;
#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                       &p_tx->active_descq);

                if (num_bds < num_bds_in_packet) {
                        DP_NOTICE(p_hwfn, true,
                                  "Rest of BDs does not cover whole packet\n");
                        goto out;
                }

                num_bds -= num_bds_in_packet;
                p_tx->bds_idx += num_bds_in_packet;
                while (num_bds_in_packet--)
                        ecore_chain_consume(&p_tx->txq_chain);

                p_tx->cur_completing_bd_idx = 1;
                b_last_frag = p_tx->cur_completing_bd_idx ==
                              p_pkt->bd_used;
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                    &p_tx->free_descq);

                OSAL_SPIN_UNLOCK_IRQSAVE(&p_tx->lock, flags);

                p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
                                           p_ll2_conn->my_id,
                                           p_pkt->cookie,
                                           p_pkt->bds_set[0].tx_frag,
                                           b_last_frag,
                                           !num_bds);

                OSAL_SPIN_LOCK_IRQSAVE(&p_tx->lock, flags);
        }

        p_tx->b_completing_packet = false;
        rc = ECORE_SUCCESS;
out:
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_tx->lock, flags);
        return rc;
}

static void ecore_ll2_rxq_parse_gsi(union core_rx_cqe_union *p_cqe,
                                    struct ecore_ll2_comp_rx_data *data)
{
        data->parse_flags =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_gsi.parse_flags.flags);
        data->length.data_length =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_gsi.data_length);
        data->vlan =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_gsi.vlan);
        data->opaque_data_0 =
                OSAL_LE32_TO_CPU(p_cqe->rx_cqe_gsi.src_mac_addrhi);
        data->opaque_data_1 =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_gsi.src_mac_addrlo);
        data->u.data_length_error =
                p_cqe->rx_cqe_gsi.data_length_error;
        data->qp_id = OSAL_LE16_TO_CPU(p_cqe->rx_cqe_gsi.qp_id);

        data->src_qp = OSAL_LE32_TO_CPU(p_cqe->rx_cqe_gsi.src_qp);
}

static void ecore_ll2_rxq_parse_reg(union core_rx_cqe_union *p_cqe,
                                    struct ecore_ll2_comp_rx_data *data)
{
        data->parse_flags =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_fp.parse_flags.flags);
        data->err_flags =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_fp.err_flags.flags);
        data->length.packet_length =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_fp.packet_length);
        data->vlan =
                OSAL_LE16_TO_CPU(p_cqe->rx_cqe_fp.vlan);
        data->opaque_data_0 =
                OSAL_LE32_TO_CPU(p_cqe->rx_cqe_fp.opaque_data.data[0]);
        data->opaque_data_1 =
                OSAL_LE32_TO_CPU(p_cqe->rx_cqe_fp.opaque_data.data[1]);
        data->u.placement_offset =
                p_cqe->rx_cqe_fp.placement_offset;
}

#if defined(_NTDDK_)
#pragma warning(suppress : 28167 26110)
#endif
static enum _ecore_status_t
ecore_ll2_handle_slowpath(struct ecore_hwfn *p_hwfn,
                          struct ecore_ll2_info *p_ll2_conn,
                          union core_rx_cqe_union *p_cqe,
                          unsigned long *p_lock_flags)
{
        struct ecore_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
        struct core_rx_slow_path_cqe *sp_cqe;

        sp_cqe = &p_cqe->rx_cqe_sp;
        if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
                DP_NOTICE(p_hwfn, true,
                          "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
                          sp_cqe->ramrod_cmd_id);
                return ECORE_INVAL;
        }

        if (p_ll2_conn->cbs.slowpath_cb == OSAL_NULL) {
                DP_NOTICE(p_hwfn, true,
                          "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
                return ECORE_INVAL;
        }

        OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, *p_lock_flags);

        p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
                                    p_ll2_conn->my_id,
                                    OSAL_LE32_TO_CPU(sp_cqe->opaque_data.data[0]),
                                    OSAL_LE32_TO_CPU(sp_cqe->opaque_data.data[1]));

        OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, *p_lock_flags);

        return ECORE_SUCCESS;
}

static enum _ecore_status_t
ecore_ll2_rxq_handle_completion(struct ecore_hwfn *p_hwfn,
                                struct ecore_ll2_info *p_ll2_conn,
                                union core_rx_cqe_union *p_cqe,
                                unsigned long *p_lock_flags,
                                bool b_last_cqe)
{
        struct ecore_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
        struct ecore_ll2_rx_packet *p_pkt = OSAL_NULL;
        struct ecore_ll2_comp_rx_data data;

        if (!OSAL_LIST_IS_EMPTY(&p_rx->active_descq))
                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_rx->active_descq,
                                              struct ecore_ll2_rx_packet,
                                              list_entry);
        if (!p_pkt) {
                DP_NOTICE(p_hwfn, false,
                          "[%d] LL2 Rx completion but active_descq is empty\n",
                          p_ll2_conn->input.conn_type);

                return ECORE_IO;
        }

        OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry, &p_rx->active_descq);

        if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
                ecore_ll2_rxq_parse_reg(p_cqe, &data);
        else
                ecore_ll2_rxq_parse_gsi(p_cqe, &data);

        if (ecore_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) {
                DP_NOTICE(p_hwfn, false,
                          "Mismatch between active_descq and the LL2 Rx chain\n");
                /* TODO - didn't return error value since this wasn't handled
                 * before, but this is obviously lacking.
                 */
        }

        OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry, &p_rx->free_descq);

        data.connection_handle = p_ll2_conn->my_id;
        data.cookie = p_pkt->cookie;
        data.rx_buf_addr = p_pkt->rx_buf_addr;
        data.b_last_packet = b_last_cqe;

        OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, *p_lock_flags);
        p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie,
                                   &data);

        OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, *p_lock_flags);

        return ECORE_SUCCESS;
}

static enum _ecore_status_t ecore_ll2_rxq_completion(struct ecore_hwfn *p_hwfn,
                                                     void *cookie)
{
        struct ecore_ll2_info *p_ll2_conn = (struct ecore_ll2_info*)cookie;
        struct ecore_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
        union core_rx_cqe_union *cqe = OSAL_NULL;
        u16 cq_new_idx = 0, cq_old_idx = 0;
        unsigned long flags = 0;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, flags);
        cq_new_idx = OSAL_LE16_TO_CPU(*p_rx->p_fw_cons);
        cq_old_idx = ecore_chain_get_cons_idx(&p_rx->rcq_chain);

        while (cq_new_idx != cq_old_idx) {
                bool b_last_cqe = (cq_new_idx == cq_old_idx);

                cqe = (union core_rx_cqe_union *)ecore_chain_consume(&p_rx->rcq_chain);
                cq_old_idx = ecore_chain_get_cons_idx(&p_rx->rcq_chain);

                DP_VERBOSE(p_hwfn, ECORE_MSG_LL2,
                           "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
                           cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);

                switch (cqe->rx_cqe_sp.type) {
                case CORE_RX_CQE_TYPE_SLOW_PATH:
                        rc = ecore_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
                                                       cqe, &flags);
                        break;
                case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
                case CORE_RX_CQE_TYPE_REGULAR:
                        rc = ecore_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
                                                             cqe, &flags,
                                                             b_last_cqe);
                        break;
                default:
                        rc = ECORE_IO;
                }
        }

        OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, flags);
        return rc;
}

static void ecore_ll2_rxq_flush(struct ecore_hwfn *p_hwfn,
                         u8 connection_handle)
{
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;
        struct ecore_ll2_rx_packet *p_pkt = OSAL_NULL;
        struct ecore_ll2_rx_queue *p_rx;
        unsigned long flags = 0;

        p_ll2_conn = ecore_ll2_handle_sanity_inactive(p_hwfn,
                                                      connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return;
        p_rx = &p_ll2_conn->rx_queue;

        OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, flags);
        while (!OSAL_LIST_IS_EMPTY(&p_rx->active_descq)) {
                bool b_last;
                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_rx->active_descq,
                                              struct ecore_ll2_rx_packet,
                                              list_entry);
                if (p_pkt == OSAL_NULL)
                        break;
#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                       &p_rx->active_descq);
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                    &p_rx->free_descq);
                b_last = OSAL_LIST_IS_EMPTY(&p_rx->active_descq);
                OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, flags);

                if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_OOO) {
                        struct ecore_ooo_buffer *p_buffer;

                        p_buffer = (struct ecore_ooo_buffer *)p_pkt->cookie;
                        ecore_ooo_put_free_buffer(p_hwfn->p_ooo_info, p_buffer);
                } else {
                        dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
                        void *cookie  = p_pkt->cookie;

                        p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
                                                      p_ll2_conn->my_id,
                                                      cookie,
                                                      rx_buf_addr,
                                                      b_last);
                }
                OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, flags);
        }
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, flags);
}

static bool
ecore_ll2_lb_rxq_handler_slowpath(struct ecore_hwfn *p_hwfn,
                                  struct core_rx_slow_path_cqe *p_cqe)
{
        struct ooo_opaque *iscsi_ooo;
        u32 cid;

        if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
                return false;

        iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
        if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
                return false;

        /* Need to make a flush */
        cid = OSAL_LE32_TO_CPU(iscsi_ooo->cid);
        ecore_ooo_release_connection_isles(p_hwfn->p_ooo_info, cid);

        return true;
}

static enum _ecore_status_t
ecore_ll2_lb_rxq_handler(struct ecore_hwfn *p_hwfn,
                         struct ecore_ll2_info *p_ll2_conn)
{
        struct ecore_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
        u16 packet_length = 0, parse_flags = 0, vlan = 0;
        struct ecore_ll2_rx_packet *p_pkt = OSAL_NULL;
        u32 cid;
        union core_rx_cqe_union *cqe = OSAL_NULL;
        u16 cq_new_idx = 0, cq_old_idx = 0;
        struct ecore_ooo_buffer *p_buffer;
        struct ooo_opaque *iscsi_ooo;
        u8 placement_offset = 0;
        u8 cqe_type;

        cq_new_idx = OSAL_LE16_TO_CPU(*p_rx->p_fw_cons);
        cq_old_idx = ecore_chain_get_cons_idx(&p_rx->rcq_chain);
        if (cq_new_idx == cq_old_idx)
                return ECORE_SUCCESS;

        while (cq_new_idx != cq_old_idx) {
                struct core_rx_fast_path_cqe *p_cqe_fp;

                cqe = (union core_rx_cqe_union *)ecore_chain_consume(&p_rx->rcq_chain);
                cq_old_idx = ecore_chain_get_cons_idx(&p_rx->rcq_chain);
                cqe_type = cqe->rx_cqe_sp.type;

                if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
                        if (ecore_ll2_lb_rxq_handler_slowpath(p_hwfn,
                                                              &cqe->rx_cqe_sp))
                                continue;

                if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
                        DP_NOTICE(p_hwfn, true,
                                  "Got a non-regular LB LL2 completion [type 0x%02x]\n",
                                  cqe_type);
                        return ECORE_INVAL;
                }
                p_cqe_fp = &cqe->rx_cqe_fp;

                placement_offset = p_cqe_fp->placement_offset;
                parse_flags = OSAL_LE16_TO_CPU(p_cqe_fp->parse_flags.flags);
                packet_length = OSAL_LE16_TO_CPU(p_cqe_fp->packet_length);
                vlan = OSAL_LE16_TO_CPU(p_cqe_fp->vlan);
                iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
                ecore_ooo_save_history_entry(p_hwfn->p_ooo_info, iscsi_ooo);
                cid = OSAL_LE32_TO_CPU(iscsi_ooo->cid);

                /* Process delete isle first*/
                if (iscsi_ooo->drop_size)
                        ecore_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 (OSAL_LIST_IS_EMPTY(&p_rx->active_descq)) {
                        DP_NOTICE(p_hwfn, true,
                                  "LL2 OOO RX chain has no submitted buffers\n");
                        return ECORE_IO;
                }

                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_rx->active_descq,
                                              struct ecore_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, true,
                                          "LL2 OOO RX packet is not valid\n");
                                return ECORE_IO;
                        }
#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                        OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                               &p_rx->active_descq);
                        p_buffer = (struct ecore_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;
                        if (ecore_chain_consume(&p_rx->rxq_chain) !=
                            p_pkt->rxq_bd) {
                                /**/
                        }
                        ecore_ooo_dump_rx_event(p_hwfn, iscsi_ooo, p_buffer);
                        OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                            &p_rx->free_descq);

                        switch (iscsi_ooo->ooo_opcode) {
                        case TCP_EVENT_ADD_NEW_ISLE:
                                ecore_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:
                                ecore_ooo_add_new_buffer(p_hwfn,
                                                         p_hwfn->p_ooo_info,
                                                         cid,
                                                         iscsi_ooo->ooo_isle,
                                                         p_buffer,
                                                         ECORE_OOO_RIGHT_BUF);
                                break;
                        case TCP_EVENT_ADD_ISLE_LEFT:
                                ecore_ooo_add_new_buffer(p_hwfn,
                                                         p_hwfn->p_ooo_info,
                                                         cid,
                                                         iscsi_ooo->ooo_isle,
                                                         p_buffer,
                                                         ECORE_OOO_LEFT_BUF);
                                break;
                        case TCP_EVENT_JOIN:
                                ecore_ooo_add_new_buffer(p_hwfn,
                                                         p_hwfn->p_ooo_info,
                                                         cid,
                                                         iscsi_ooo->ooo_isle +
                                                         1,
                                                         p_buffer,
                                                         ECORE_OOO_LEFT_BUF);
                                ecore_ooo_join_isles(p_hwfn,
                                                     p_hwfn->p_ooo_info,
                                                     cid,
                                                     iscsi_ooo->ooo_isle);
                                break;
                        case TCP_EVENT_ADD_PEN:
                                ecore_ooo_put_ready_buffer(p_hwfn->p_ooo_info,
                                                           p_buffer, true);
                                break;
                        }
                } else {
                        DP_NOTICE(p_hwfn, true,
                                  "Unexpected event (%d) TX OOO completion\n",
                                  iscsi_ooo->ooo_opcode);
                }
        }

        return ECORE_SUCCESS;
}

static void
ecore_ooo_submit_tx_buffers(struct ecore_hwfn *p_hwfn,
                            struct ecore_ll2_info *p_ll2_conn)
{
        struct ecore_ll2_tx_pkt_info tx_pkt;
        struct ecore_ooo_buffer *p_buffer;
        dma_addr_t first_frag;
        u16 l4_hdr_offset_w;
        u8 bd_flags;
        enum _ecore_status_t rc;

        /* Submit Tx buffers here */
        while ((p_buffer = ecore_ooo_get_ready_buffer(p_hwfn->p_ooo_info))) {
                l4_hdr_offset_w = 0;
                bd_flags = 0;

                first_frag = p_buffer->rx_buffer_phys_addr +
                             p_buffer->placement_offset;
                SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
                SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);

                OSAL_MEM_ZERO(&tx_pkt, sizeof(tx_pkt));
                tx_pkt.num_of_bds = 1;
                tx_pkt.vlan = p_buffer->vlan;
                tx_pkt.bd_flags = bd_flags;
                tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
                tx_pkt.tx_dest = (enum ecore_ll2_tx_dest)p_ll2_conn->tx_dest;
                tx_pkt.first_frag = first_frag;
                tx_pkt.first_frag_len = p_buffer->packet_length;
                tx_pkt.cookie = p_buffer;

                rc = ecore_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
                                                 &tx_pkt, true);
                if (rc != ECORE_SUCCESS) {
                        ecore_ooo_put_ready_buffer(p_hwfn->p_ooo_info,
                                                   p_buffer, false);
                        break;
                }
        }
}

static void
ecore_ooo_submit_rx_buffers(struct ecore_hwfn *p_hwfn,
                            struct ecore_ll2_info *p_ll2_conn)
{
        struct ecore_ooo_buffer *p_buffer;
        enum _ecore_status_t rc;

        while ((p_buffer = ecore_ooo_get_free_buffer(p_hwfn->p_ooo_info))) {
                rc = ecore_ll2_post_rx_buffer(p_hwfn,
                                            p_ll2_conn->my_id,
                                            p_buffer->rx_buffer_phys_addr,
                                            0, p_buffer, true);
                if (rc != ECORE_SUCCESS) {
                        ecore_ooo_put_free_buffer(p_hwfn->p_ooo_info, p_buffer);
                        break;
                }
        }
}

static enum _ecore_status_t
ecore_ll2_lb_rxq_completion(struct ecore_hwfn *p_hwfn,
                            void *p_cookie)
{
        struct ecore_ll2_info *p_ll2_conn = (struct ecore_ll2_info *)p_cookie;
        enum _ecore_status_t rc;

        rc = ecore_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
        if (rc != ECORE_SUCCESS)
                return rc;

        ecore_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
        ecore_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);

        return 0;
}

static enum _ecore_status_t
ecore_ll2_lb_txq_completion(struct ecore_hwfn *p_hwfn,
                            void *p_cookie)
{
        struct ecore_ll2_info *p_ll2_conn = (struct ecore_ll2_info *)p_cookie;
        struct ecore_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
        struct ecore_ll2_tx_packet *p_pkt = OSAL_NULL;
        struct ecore_ooo_buffer *p_buffer;
        bool b_dont_submit_rx = false;
        u16 new_idx = 0, num_bds = 0;
        enum _ecore_status_t rc;

        new_idx = OSAL_LE16_TO_CPU(*p_tx->p_fw_cons);
        num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);

        if (!num_bds)
                return ECORE_SUCCESS;

        while (num_bds) {
                if (OSAL_LIST_IS_EMPTY(&p_tx->active_descq))
                        return ECORE_INVAL;

                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_tx->active_descq,
                                              struct ecore_ll2_tx_packet,
                                              list_entry);
                if (!p_pkt)
                        return ECORE_INVAL;

                if (p_pkt->bd_used != 1) {
                        DP_NOTICE(p_hwfn, true,
                                  "Unexpectedly many BDs(%d) in TX OOO completion\n",
                                  p_pkt->bd_used);
                        return ECORE_INVAL;
                }

                OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                       &p_tx->active_descq);

                num_bds--;
                p_tx->bds_idx++;
                ecore_chain_consume(&p_tx->txq_chain);

                p_buffer = (struct ecore_ooo_buffer *)p_pkt->cookie;
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                    &p_tx->free_descq);

                if (b_dont_submit_rx) {
                        ecore_ooo_put_free_buffer(p_hwfn->p_ooo_info, p_buffer);
                        continue;
                }

                rc = ecore_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
                                              p_buffer->rx_buffer_phys_addr, 0,
                                              p_buffer, true);
                if (rc != ECORE_SUCCESS) {
                        ecore_ooo_put_free_buffer(p_hwfn->p_ooo_info, p_buffer);
                        b_dont_submit_rx = true;
                }
        }

        ecore_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);

        return ECORE_SUCCESS;
}

static enum _ecore_status_t ecore_sp_ll2_rx_queue_start(struct ecore_hwfn *p_hwfn,
                                                        struct ecore_ll2_info *p_ll2_conn,
                                                        u8 action_on_error)
{
        enum ecore_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
        struct ecore_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
        struct core_rx_start_ramrod_data *p_ramrod = OSAL_NULL;
        struct ecore_spq_entry *p_ent = OSAL_NULL;
        struct ecore_sp_init_data init_data;
        u16 cqe_pbl_size;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        /* Get SPQ entry */
        OSAL_MEMSET(&init_data, 0, sizeof(init_data));
        init_data.cid = p_ll2_conn->cid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = ECORE_SPQ_MODE_EBLOCK;

        rc = ecore_sp_init_request(p_hwfn, &p_ent,
                                   CORE_RAMROD_RX_QUEUE_START,
                                   PROTOCOLID_CORE, &init_data);
        if (rc != ECORE_SUCCESS)
                return rc;

        p_ramrod = &p_ent->ramrod.core_rx_queue_start;

        p_ramrod->sb_id = OSAL_CPU_TO_LE16(ecore_int_get_sp_sb_id(p_hwfn));
        p_ramrod->sb_index = p_rx->rx_sb_index;
        p_ramrod->complete_event_flg = 1;

        p_ramrod->mtu = OSAL_CPU_TO_LE16(p_ll2_conn->input.mtu);
        DMA_REGPAIR_LE(p_ramrod->bd_base,
                       p_rx->rxq_chain.p_phys_addr);
        cqe_pbl_size = (u16)ecore_chain_get_page_cnt(&p_rx->rcq_chain);
        p_ramrod->num_of_pbl_pages = OSAL_CPU_TO_LE16(cqe_pbl_size);
        DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
                       ecore_chain_get_pbl_phys(&p_rx->rcq_chain));

        p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
        p_ramrod->inner_vlan_stripping_en =
                p_ll2_conn->input.rx_vlan_removal_en;

        if (OSAL_TEST_BIT(ECORE_MF_UFP_SPECIFIC, &p_hwfn->p_dev->mf_bits) &&
            (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_FCOE))
                p_ramrod->report_outer_vlan = 1;
        p_ramrod->queue_id = p_ll2_conn->queue_id;
        p_ramrod->main_func_queue = p_ll2_conn->main_func_queue;

        if (OSAL_TEST_BIT(ECORE_MF_LL2_NON_UNICAST,
                          &p_hwfn->p_dev->mf_bits) &&
            p_ramrod->main_func_queue &&
            ((conn_type != ECORE_LL2_TYPE_ROCE) &&
             (conn_type != ECORE_LL2_TYPE_IWARP))) {
                p_ramrod->mf_si_bcast_accept_all = 1;
                p_ramrod->mf_si_mcast_accept_all = 1;
        } else {
                p_ramrod->mf_si_bcast_accept_all = 0;
                p_ramrod->mf_si_mcast_accept_all = 0;
        }

        p_ramrod->action_on_error.error_type = action_on_error;
        p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
        return ecore_spq_post(p_hwfn, p_ent, OSAL_NULL);
}

static enum _ecore_status_t ecore_sp_ll2_tx_queue_start(struct ecore_hwfn *p_hwfn,
                                                        struct ecore_ll2_info *p_ll2_conn)
{
        enum ecore_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
        struct ecore_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
        struct core_tx_start_ramrod_data *p_ramrod = OSAL_NULL;
        struct ecore_spq_entry *p_ent = OSAL_NULL;
        struct ecore_sp_init_data init_data;
        u16 pq_id = 0, pbl_size;
        enum _ecore_status_t rc = ECORE_NOTIMPL;

        if (!ECORE_LL2_TX_REGISTERED(p_ll2_conn))
                return ECORE_SUCCESS;

        if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_OOO)
                p_ll2_conn->tx_stats_en = 0;
        else
                p_ll2_conn->tx_stats_en = 1;

        /* Get SPQ entry */
        OSAL_MEMSET(&init_data, 0, sizeof(init_data));
        init_data.cid = p_ll2_conn->cid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = ECORE_SPQ_MODE_EBLOCK;

        rc = ecore_sp_init_request(p_hwfn, &p_ent,
                                   CORE_RAMROD_TX_QUEUE_START,
                                   PROTOCOLID_CORE, &init_data);
        if (rc != ECORE_SUCCESS)
                return rc;

        p_ramrod = &p_ent->ramrod.core_tx_queue_start;

        p_ramrod->sb_id = OSAL_CPU_TO_LE16(ecore_int_get_sp_sb_id(p_hwfn));
        p_ramrod->sb_index = p_tx->tx_sb_index;
        p_ramrod->mtu = OSAL_CPU_TO_LE16(p_ll2_conn->input.mtu);
        p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
        p_ramrod->stats_id = p_ll2_conn->tx_stats_id;

        DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
                       ecore_chain_get_pbl_phys(&p_tx->txq_chain));
        pbl_size = (u16)ecore_chain_get_page_cnt(&p_tx->txq_chain);
        p_ramrod->pbl_size = OSAL_CPU_TO_LE16(pbl_size);

        /* TODO RESC_ALLOC pq for ll2 */
        switch (p_ll2_conn->input.tx_tc) {
        case PURE_LB_TC:
                pq_id = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
                break;
        case PKT_LB_TC:
                pq_id = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
                break;
        default:
                pq_id = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
        }

        p_ramrod->qm_pq_id = OSAL_CPU_TO_LE16(pq_id);

        switch (conn_type) {
        case ECORE_LL2_TYPE_FCOE:
                p_ramrod->conn_type = PROTOCOLID_FCOE;
                break;
        case ECORE_LL2_TYPE_ISCSI:
                p_ramrod->conn_type = PROTOCOLID_ISCSI;
                break;
        case ECORE_LL2_TYPE_ROCE:
                p_ramrod->conn_type = PROTOCOLID_ROCE;
                break;
        case ECORE_LL2_TYPE_IWARP:
                p_ramrod->conn_type = PROTOCOLID_IWARP;
                break;
        case ECORE_LL2_TYPE_OOO:
                if (p_hwfn->hw_info.personality == ECORE_PCI_ISCSI) {
                        p_ramrod->conn_type = PROTOCOLID_ISCSI;
                } else {
                        p_ramrod->conn_type = PROTOCOLID_IWARP;
                }
                break;
        default:
                p_ramrod->conn_type = PROTOCOLID_ETH;
                DP_NOTICE(p_hwfn, false, "Unknown connection type: %d\n",
                          conn_type);
        }

        p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;

        rc = ecore_spq_post(p_hwfn, p_ent, OSAL_NULL);
        if (rc != ECORE_SUCCESS)
                return rc;

        rc = ecore_db_recovery_add(p_hwfn->p_dev, p_tx->doorbell_addr,
                                   &p_tx->db_msg, DB_REC_WIDTH_32B,
                                   DB_REC_KERNEL);
        return rc;
}

static enum _ecore_status_t ecore_sp_ll2_rx_queue_stop(struct ecore_hwfn *p_hwfn,
                                                       struct ecore_ll2_info *p_ll2_conn)
{
        struct core_rx_stop_ramrod_data *p_ramrod = OSAL_NULL;
        struct ecore_spq_entry *p_ent = OSAL_NULL;
        struct ecore_sp_init_data init_data;
        enum _ecore_status_t rc = ECORE_NOTIMPL;

        /* Get SPQ entry */
        OSAL_MEMSET(&init_data, 0, sizeof(init_data));
        init_data.cid = p_ll2_conn->cid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = ECORE_SPQ_MODE_EBLOCK;

        rc = ecore_sp_init_request(p_hwfn, &p_ent,
                                   CORE_RAMROD_RX_QUEUE_STOP,
                                   PROTOCOLID_CORE, &init_data);
        if (rc != ECORE_SUCCESS)
                return rc;

        p_ramrod = &p_ent->ramrod.core_rx_queue_stop;

        p_ramrod->complete_event_flg = 1;
        p_ramrod->queue_id = p_ll2_conn->queue_id;

        return ecore_spq_post(p_hwfn, p_ent, OSAL_NULL);
}

static enum _ecore_status_t ecore_sp_ll2_tx_queue_stop(struct ecore_hwfn *p_hwfn,
                                                       struct ecore_ll2_info *p_ll2_conn)
{
        struct ecore_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
        struct ecore_spq_entry *p_ent = OSAL_NULL;
        struct ecore_sp_init_data init_data;
        enum _ecore_status_t rc = ECORE_NOTIMPL;

        ecore_db_recovery_del(p_hwfn->p_dev, p_tx->doorbell_addr,
                              &p_tx->db_msg);

        /* Get SPQ entry */
        OSAL_MEMSET(&init_data, 0, sizeof(init_data));
        init_data.cid = p_ll2_conn->cid;
        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
        init_data.comp_mode = ECORE_SPQ_MODE_EBLOCK;

        rc = ecore_sp_init_request(p_hwfn, &p_ent,
                                   CORE_RAMROD_TX_QUEUE_STOP,
                                   PROTOCOLID_CORE, &init_data);
        if (rc != ECORE_SUCCESS)
                return rc;

        return ecore_spq_post(p_hwfn, p_ent, OSAL_NULL);
}

static enum _ecore_status_t
ecore_ll2_acquire_connection_rx(struct ecore_hwfn *p_hwfn,
                                struct ecore_ll2_info *p_ll2_info)
{
        struct ecore_ll2_rx_packet *p_descq;
        u32 capacity;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        if (!p_ll2_info->input.rx_num_desc)
                goto out;

        rc = ecore_chain_alloc(p_hwfn->p_dev,
                               ECORE_CHAIN_USE_TO_CONSUME_PRODUCE,
                               ECORE_CHAIN_MODE_NEXT_PTR,
                               ECORE_CHAIN_CNT_TYPE_U16,
                               p_ll2_info->input.rx_num_desc,
                               sizeof(struct core_rx_bd),
                               &p_ll2_info->rx_queue.rxq_chain, OSAL_NULL);
        if (rc) {
                DP_NOTICE(p_hwfn, false,
                          "Failed to allocate ll2 rxq chain\n");
                goto out;
        }

        capacity = ecore_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
        p_descq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL,
                              capacity * sizeof(struct ecore_ll2_rx_packet));
        if (!p_descq) {
                rc = ECORE_NOMEM;
                DP_NOTICE(p_hwfn, false,
                          "Failed to allocate ll2 Rx desc\n");
                goto out;
        }
        p_ll2_info->rx_queue.descq_array = p_descq;

        rc = ecore_chain_alloc(p_hwfn->p_dev,
                               ECORE_CHAIN_USE_TO_CONSUME_PRODUCE,
                               ECORE_CHAIN_MODE_PBL,
                               ECORE_CHAIN_CNT_TYPE_U16,
                               p_ll2_info->input.rx_num_desc,
                               sizeof(struct core_rx_fast_path_cqe),
                               &p_ll2_info->rx_queue.rcq_chain, OSAL_NULL);
        if (rc != ECORE_SUCCESS) {
                DP_NOTICE(p_hwfn, false,
                          "Failed to allocate ll2 rcq chain\n");
                goto out;
        }

        DP_VERBOSE(p_hwfn, ECORE_MSG_LL2,
                   "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
                   p_ll2_info->input.conn_type,
                   p_ll2_info->input.rx_num_desc);

out:
        return rc;
}

static enum _ecore_status_t
ecore_ll2_acquire_connection_tx(struct ecore_hwfn *p_hwfn,
                                struct ecore_ll2_info *p_ll2_info)
{
        struct ecore_ll2_tx_packet *p_descq;
        u32 capacity;
        enum _ecore_status_t rc = ECORE_SUCCESS;
        u32 desc_size;

        if (!p_ll2_info->input.tx_num_desc)
                goto out;

        rc = ecore_chain_alloc(p_hwfn->p_dev,
                               ECORE_CHAIN_USE_TO_CONSUME_PRODUCE,
                               ECORE_CHAIN_MODE_PBL,
                               ECORE_CHAIN_CNT_TYPE_U16,
                               p_ll2_info->input.tx_num_desc,
                               sizeof(struct core_tx_bd),
                               &p_ll2_info->tx_queue.txq_chain, OSAL_NULL);
        if (rc != ECORE_SUCCESS)
                goto out;

        capacity = ecore_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
        desc_size = (sizeof(*p_descq) +
                     (p_ll2_info->input.tx_max_bds_per_packet - 1) *
                     sizeof(p_descq->bds_set));

        p_descq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL,
                              capacity * desc_size);
        if (!p_descq) {
                rc = ECORE_NOMEM;
                goto out;
        }
        p_ll2_info->tx_queue.descq_array = p_descq;

        DP_VERBOSE(p_hwfn, ECORE_MSG_LL2,
                   "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
                   p_ll2_info->input.conn_type,
                   p_ll2_info->input.tx_num_desc);

out:
        if (rc != ECORE_SUCCESS)
                DP_NOTICE(p_hwfn, false,
                          "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
                          p_ll2_info->input.tx_num_desc);
        return rc;
}

static enum _ecore_status_t
ecore_ll2_acquire_connection_ooo(struct ecore_hwfn *p_hwfn,
                                 struct ecore_ll2_info *p_ll2_info, u16 mtu)
{
        struct ecore_ooo_buffer *p_buf = OSAL_NULL;
        u32 rx_buffer_size = 0;
        void *p_virt;
        u16 buf_idx;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        if (p_ll2_info->input.conn_type != ECORE_LL2_TYPE_OOO)
                return rc;

        /* Correct number of requested OOO buffers if needed */
        if (!p_ll2_info->input.rx_num_ooo_buffers) {
                u16 num_desc = p_ll2_info->input.rx_num_desc;

                if (!num_desc)
                        return ECORE_INVAL;
                p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
        }

        /* TODO - use some defines for buffer size */
        rx_buffer_size = mtu + 14 + 4 + 8 + ETH_CACHE_LINE_SIZE;
        rx_buffer_size = (rx_buffer_size + ETH_CACHE_LINE_SIZE - 1) &
                         ~(ETH_CACHE_LINE_SIZE - 1);

        for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
             buf_idx++) {
                p_buf = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_buf));
                if (!p_buf) {
                        DP_NOTICE(p_hwfn, false,
                                  "Failed to allocate ooo descriptor\n");
                        rc = ECORE_NOMEM;
                        goto out;
                }

                p_buf->rx_buffer_size = rx_buffer_size;
                p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev,
                                                 &p_buf->rx_buffer_phys_addr,
                                                 p_buf->rx_buffer_size);
                if (!p_virt) {
                        DP_NOTICE(p_hwfn, false,
                                  "Failed to allocate ooo buffer\n");
                        OSAL_FREE(p_hwfn->p_dev, p_buf);
                        rc = ECORE_NOMEM;
                        goto out;
                }
                p_buf->rx_buffer_virt_addr = p_virt;
                ecore_ooo_put_free_buffer(p_hwfn->p_ooo_info, p_buf);
        }

        DP_VERBOSE(p_hwfn, ECORE_MSG_LL2,
                   "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
                   p_ll2_info->input.rx_num_ooo_buffers, rx_buffer_size);

out:
        return rc;
}

static enum _ecore_status_t
ecore_ll2_set_cbs(struct ecore_ll2_info *p_ll2_info,
                    const struct ecore_ll2_cbs *cbs)
{
        if (!cbs || (!cbs->rx_comp_cb ||
                     !cbs->rx_release_cb ||
                     !cbs->tx_comp_cb ||
                     !cbs->tx_release_cb ||
                     !cbs->cookie))
                return ECORE_INVAL;

        p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
        p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
        p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
        p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
        p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
        p_ll2_info->cbs.cookie = cbs->cookie;

        return ECORE_SUCCESS;
}

static enum core_error_handle
ecore_ll2_get_error_choice(enum ecore_ll2_error_handle err)
{
        switch (err) {
        case ECORE_LL2_DROP_PACKET:
                return LL2_DROP_PACKET;
        case ECORE_LL2_DO_NOTHING:
                return LL2_DO_NOTHING;
        case ECORE_LL2_ASSERT:
                return LL2_ASSERT;
        default:
                return LL2_DO_NOTHING;
        }
}

enum _ecore_status_t
ecore_ll2_acquire_connection(void *cxt,
                             struct ecore_ll2_acquire_data *data)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        ecore_int_comp_cb_t comp_rx_cb, comp_tx_cb;
        struct ecore_ll2_info *p_ll2_info = OSAL_NULL;
        enum _ecore_status_t rc;
        u8 i, *p_tx_max;

        if (!data->p_connection_handle || !p_hwfn->p_ll2_info) {
                DP_NOTICE(p_hwfn, false, "Invalid connection handle, ll2_info not allocated\n");
                return ECORE_INVAL;
        }

        /* Find a free connection to be used */
        for (i = 0; (i < ECORE_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
                OSAL_MUTEX_ACQUIRE(&p_hwfn->p_ll2_info[i].mutex);
                if (p_hwfn->p_ll2_info[i].b_active) {
                        OSAL_MUTEX_RELEASE(&p_hwfn->p_ll2_info[i].mutex);
                        continue;
                }

                p_hwfn->p_ll2_info[i].b_active = true;
                p_ll2_info = &p_hwfn->p_ll2_info[i];
                OSAL_MUTEX_RELEASE(&p_hwfn->p_ll2_info[i].mutex);
                break;
        }
        if (p_ll2_info == OSAL_NULL) {
                DP_NOTICE(p_hwfn, false, "No available ll2 connection\n");
                return ECORE_BUSY;
        }

        OSAL_MEMCPY(&p_ll2_info->input, &data->input,
                    sizeof(p_ll2_info->input));

        switch (data->input.tx_dest) {
        case ECORE_LL2_TX_DEST_NW:
                p_ll2_info->tx_dest = CORE_TX_DEST_NW;
                break;
        case ECORE_LL2_TX_DEST_LB:
                p_ll2_info->tx_dest = CORE_TX_DEST_LB;
                break;
        case ECORE_LL2_TX_DEST_DROP:
                p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
                break;
        default:
                return ECORE_INVAL;
        }

        if ((data->input.conn_type == ECORE_LL2_TYPE_OOO) ||
            data->input.secondary_queue)
                p_ll2_info->main_func_queue = false;
        else
                p_ll2_info->main_func_queue = true;

        /* Correct maximum number of Tx BDs */
        p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
        if (*p_tx_max == 0)
                *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
        else
                *p_tx_max = OSAL_MIN_T(u8, *p_tx_max,
                                       CORE_LL2_TX_MAX_BDS_PER_PACKET);

        rc = ecore_ll2_set_cbs(p_ll2_info, data->cbs);
        if (rc) {
                DP_NOTICE(p_hwfn, false, "Invalid callback functions\n");
                goto q_allocate_fail;
        }

        rc = ecore_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
        if (rc != ECORE_SUCCESS) {
                DP_NOTICE(p_hwfn, false, "ll2 acquire rx connection failed\n");
                goto q_allocate_fail;
        }

        rc = ecore_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
        if (rc != ECORE_SUCCESS) {
                DP_NOTICE(p_hwfn, false, "ll2 acquire tx connection failed\n");
                goto q_allocate_fail;
        }

        rc = ecore_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
                                              data->input.mtu);
        if (rc != ECORE_SUCCESS) {
                DP_NOTICE(p_hwfn, false, "ll2 acquire ooo connection failed\n");
                goto q_allocate_fail;
        }

        /* Register callbacks for the Rx/Tx queues */
        if (data->input.conn_type == ECORE_LL2_TYPE_OOO) {
                comp_rx_cb = ecore_ll2_lb_rxq_completion;
                comp_tx_cb = ecore_ll2_lb_txq_completion;

        } else {
                comp_rx_cb = ecore_ll2_rxq_completion;
                comp_tx_cb = ecore_ll2_txq_completion;
        }

        if (data->input.rx_num_desc) {
                ecore_int_register_cb(p_hwfn, comp_rx_cb,
                                      &p_hwfn->p_ll2_info[i],
                                      &p_ll2_info->rx_queue.rx_sb_index,
                                      &p_ll2_info->rx_queue.p_fw_cons);
                p_ll2_info->rx_queue.b_cb_registred   = true;
        }

        if (data->input.tx_num_desc) {
                ecore_int_register_cb(p_hwfn,
                                      comp_tx_cb,
                                      &p_hwfn->p_ll2_info[i],
                                      &p_ll2_info->tx_queue.tx_sb_index,
                                      &p_ll2_info->tx_queue.p_fw_cons);
                p_ll2_info->tx_queue.b_cb_registred   = true;
        }

        *(data->p_connection_handle) = i;
        return rc;

q_allocate_fail:
        ecore_ll2_release_connection(p_hwfn, i);
        return ECORE_NOMEM;
}

static enum _ecore_status_t ecore_ll2_establish_connection_rx(struct ecore_hwfn *p_hwfn,
                                                              struct ecore_ll2_info *p_ll2_conn)
{
        enum ecore_ll2_error_handle error_input;
        enum core_error_handle error_mode;
        u8 action_on_error = 0;

        if (!ECORE_LL2_RX_REGISTERED(p_ll2_conn))
                return ECORE_SUCCESS;

        DIRECT_REG_WR(p_hwfn, p_ll2_conn->rx_queue.set_prod_addr, 0x0);
        error_input = p_ll2_conn->input.ai_err_packet_too_big;
        error_mode = ecore_ll2_get_error_choice(error_input);
        SET_FIELD(action_on_error,
                  CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
        error_input = p_ll2_conn->input.ai_err_no_buf;
        error_mode = ecore_ll2_get_error_choice(error_input);
        SET_FIELD(action_on_error,
                  CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);

        return ecore_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
}

static void
ecore_ll2_establish_connection_ooo(struct ecore_hwfn *p_hwfn,
                                   struct ecore_ll2_info *p_ll2_conn)
{
        if (p_ll2_conn->input.conn_type != ECORE_LL2_TYPE_OOO)
                return;

        ecore_ooo_release_all_isles(p_hwfn->p_ooo_info);
        ecore_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
}

enum _ecore_status_t ecore_ll2_establish_connection(void *cxt,
                                                    u8 connection_handle)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct e4_core_conn_context *p_cxt;
        struct ecore_ll2_info *p_ll2_conn;
        struct ecore_cxt_info cxt_info;
        struct ecore_ll2_rx_queue *p_rx;
        struct ecore_ll2_tx_queue *p_tx;
        struct ecore_ll2_tx_packet *p_pkt;
        struct ecore_ptt *p_ptt;
        enum _ecore_status_t rc = ECORE_NOTIMPL;
        u32 i, capacity;
        u32 desc_size;
        u8 qid;

        p_ptt = ecore_ptt_acquire(p_hwfn);
        if (!p_ptt)
                return ECORE_AGAIN;

        p_ll2_conn = ecore_ll2_handle_sanity_lock(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL) {
                rc = ECORE_INVAL;
                goto out;
        }

        p_rx = &p_ll2_conn->rx_queue;
        p_tx = &p_ll2_conn->tx_queue;

        ecore_chain_reset(&p_rx->rxq_chain);
        ecore_chain_reset(&p_rx->rcq_chain);
        OSAL_LIST_INIT(&p_rx->active_descq);
        OSAL_LIST_INIT(&p_rx->free_descq);
        OSAL_LIST_INIT(&p_rx->posting_descq);
        OSAL_SPIN_LOCK_INIT(&p_rx->lock);
        capacity = ecore_chain_get_capacity(&p_rx->rxq_chain);
        for (i = 0; i < capacity; i++)
                OSAL_LIST_PUSH_TAIL(&p_rx->descq_array[i].list_entry,
                                    &p_rx->free_descq);
        *p_rx->p_fw_cons = 0;

        ecore_chain_reset(&p_tx->txq_chain);
        OSAL_LIST_INIT(&p_tx->active_descq);
        OSAL_LIST_INIT(&p_tx->free_descq);
        OSAL_LIST_INIT(&p_tx->sending_descq);
        OSAL_SPIN_LOCK_INIT(&p_tx->lock);
        capacity = ecore_chain_get_capacity(&p_tx->txq_chain);
        /* The size of the element in descq_array is flexible */
        desc_size = (sizeof(*p_pkt) +
                     (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
                     sizeof(p_pkt->bds_set));

        for (i = 0; i < capacity; i++) {
                p_pkt = (struct ecore_ll2_tx_packet *)((u8 *)p_tx->descq_array +
                                                       desc_size*i);
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry,
                                    &p_tx->free_descq);
        }
        p_tx->cur_completing_bd_idx = 0;
        p_tx->bds_idx = 0;
        p_tx->b_completing_packet = false;
        p_tx->cur_send_packet = OSAL_NULL;
        p_tx->cur_send_frag_num = 0;
        p_tx->cur_completing_frag_num = 0;
        *p_tx->p_fw_cons = 0;

        rc = ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
        if (rc)
                goto out;
        cxt_info.iid = p_ll2_conn->cid;
        rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info);
        if (rc) {
                DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d\n",
                          p_ll2_conn->cid);
                goto out;
        }

        p_cxt = cxt_info.p_cxt;

        /* @@@TBD we zero the context until we have ilt_reset implemented. */
        OSAL_MEM_ZERO(p_cxt, sizeof(*p_cxt));

        qid = ecore_ll2_handle_to_queue_id(p_hwfn, connection_handle);
        p_ll2_conn->queue_id = qid;
        p_ll2_conn->tx_stats_id = qid;
        p_rx->set_prod_addr = (u8 OSAL_IOMEM*)p_hwfn->regview +
                                              GTT_BAR0_MAP_REG_TSDM_RAM +
                                              TSTORM_LL2_RX_PRODS_OFFSET(qid);
        p_tx->doorbell_addr = (u8 OSAL_IOMEM*)p_hwfn->doorbells +
                                              DB_ADDR(p_ll2_conn->cid,
                                                      DQ_DEMS_LEGACY);

        /* prepare db data */
        SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
        SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD,
                  DB_AGG_CMD_SET);
        SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
                  DQ_XCM_CORE_TX_BD_PROD_CMD);
        p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;

        rc = ecore_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
        if (rc)
                goto out;

        rc = ecore_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
        if (rc)
                goto out;

        if (!ECORE_IS_RDMA_PERSONALITY(p_hwfn))
                ecore_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);

        ecore_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);

        if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_FCOE) {
                if (!OSAL_TEST_BIT(ECORE_MF_UFP_SPECIFIC,
                                   &p_hwfn->p_dev->mf_bits))
                        ecore_llh_add_protocol_filter(p_hwfn->p_dev, 0,
                                                      ECORE_LLH_FILTER_ETHERTYPE,
                                                      0x8906, 0);
                ecore_llh_add_protocol_filter(p_hwfn->p_dev, 0,
                                              ECORE_LLH_FILTER_ETHERTYPE,
                                              0x8914, 0);
        }

out:
        ecore_ptt_release(p_hwfn, p_ptt);

        return rc;
}

static void ecore_ll2_post_rx_buffer_notify_fw(struct ecore_hwfn *p_hwfn,
                                               struct ecore_ll2_rx_queue *p_rx,
                                               struct ecore_ll2_rx_packet *p_curp)
{
        struct ecore_ll2_rx_packet *p_posting_packet = OSAL_NULL;
        struct core_ll2_rx_prod rx_prod = {0, 0, 0};
        bool b_notify_fw = false;
        u16 bd_prod, cq_prod;

        /* This handles the flushing of already posted buffers */
        while (!OSAL_LIST_IS_EMPTY(&p_rx->posting_descq)) {
                p_posting_packet = OSAL_LIST_FIRST_ENTRY(&p_rx->posting_descq,
                                                         struct ecore_ll2_rx_packet,
                                                         list_entry);
#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                OSAL_LIST_REMOVE_ENTRY(&p_posting_packet->list_entry, &p_rx->posting_descq);
                OSAL_LIST_PUSH_TAIL(&p_posting_packet->list_entry, &p_rx->active_descq);
                b_notify_fw = true;
        }

        /* This handles the supplied packet [if there is one] */
        if (p_curp) {
                OSAL_LIST_PUSH_TAIL(&p_curp->list_entry,
                                    &p_rx->active_descq);
                b_notify_fw = true;
        }

        if (!b_notify_fw)
                return;

        bd_prod = ecore_chain_get_prod_idx(&p_rx->rxq_chain);
        cq_prod = ecore_chain_get_prod_idx(&p_rx->rcq_chain);
        rx_prod.bd_prod = OSAL_CPU_TO_LE16(bd_prod);
        rx_prod.cqe_prod = OSAL_CPU_TO_LE16(cq_prod);
        DIRECT_REG_WR(p_hwfn, p_rx->set_prod_addr, *((u32 *)&rx_prod));
}

enum _ecore_status_t ecore_ll2_post_rx_buffer(void *cxt,
                                              u8 connection_handle,
                                              dma_addr_t addr,
                                              u16 buf_len,
                                              void *cookie,
                                              u8 notify_fw)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct core_rx_bd_with_buff_len *p_curb = OSAL_NULL;
        struct ecore_ll2_rx_packet *p_curp = OSAL_NULL;
        struct ecore_ll2_info *p_ll2_conn;
        struct ecore_ll2_rx_queue *p_rx;
        unsigned long flags;
        void *p_data;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        p_ll2_conn = ecore_ll2_handle_sanity(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return ECORE_INVAL;
        p_rx = &p_ll2_conn->rx_queue;
        if (p_rx->set_prod_addr == OSAL_NULL)
                return ECORE_IO;

        OSAL_SPIN_LOCK_IRQSAVE(&p_rx->lock, flags);
        if (!OSAL_LIST_IS_EMPTY(&p_rx->free_descq))
                p_curp = OSAL_LIST_FIRST_ENTRY(&p_rx->free_descq,
                                               struct ecore_ll2_rx_packet,
                                               list_entry);
        if (p_curp) {
                if (ecore_chain_get_elem_left(&p_rx->rxq_chain) &&
                    ecore_chain_get_elem_left(&p_rx->rcq_chain)) {
                        p_data = ecore_chain_produce(&p_rx->rxq_chain);
                        p_curb = (struct core_rx_bd_with_buff_len *)p_data;
                        ecore_chain_produce(&p_rx->rcq_chain);
                }
        }

        /* If we're lacking entires, let's try to flush buffers to FW */
        if (!p_curp || !p_curb) {
                rc =  ECORE_BUSY;
                p_curp = OSAL_NULL;
                goto out_notify;
        }

        /* We have an Rx packet we can fill */
        DMA_REGPAIR_LE(p_curb->addr, addr);
        p_curb->buff_length = OSAL_CPU_TO_LE16(buf_len);
        p_curp->rx_buf_addr = addr;
        p_curp->cookie = cookie;
        p_curp->rxq_bd = p_curb;
        p_curp->buf_length = buf_len;
        OSAL_LIST_REMOVE_ENTRY(&p_curp->list_entry,
                               &p_rx->free_descq);

        /* Check if we only want to enqueue this packet without informing FW */
        if (!notify_fw) {
                OSAL_LIST_PUSH_TAIL(&p_curp->list_entry,
                                    &p_rx->posting_descq);
                goto out;
        }

out_notify:
        ecore_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
out:
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_rx->lock, flags);
        return rc;
}

static void ecore_ll2_prepare_tx_packet_set(struct ecore_ll2_tx_queue *p_tx,
                                            struct ecore_ll2_tx_packet *p_curp,
                                            struct ecore_ll2_tx_pkt_info *pkt,
                                            u8 notify_fw)
{
        OSAL_LIST_REMOVE_ENTRY(&p_curp->list_entry,
                               &p_tx->free_descq);
        p_curp->cookie = pkt->cookie;
        p_curp->bd_used = pkt->num_of_bds;
        p_curp->notify_fw = notify_fw;
        p_tx->cur_send_packet = p_curp;
        p_tx->cur_send_frag_num = 0;

        p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
        p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
        p_tx->cur_send_frag_num++;
}

static void ecore_ll2_prepare_tx_packet_set_bd(
                struct ecore_hwfn *p_hwfn,
                struct ecore_ll2_info *p_ll2,
                struct ecore_ll2_tx_packet *p_curp,
                struct ecore_ll2_tx_pkt_info *pkt)
{
        struct ecore_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
        u16 prod_idx = ecore_chain_get_prod_idx(p_tx_chain);
        struct core_tx_bd *start_bd = OSAL_NULL;
        enum core_roce_flavor_type roce_flavor;
        enum core_tx_dest tx_dest;
        u16 bd_data = 0, frag_idx;

        roce_flavor = (pkt->ecore_roce_flavor == ECORE_LL2_ROCE) ?
                CORE_ROCE : CORE_RROCE;

        switch (pkt->tx_dest) {
        case ECORE_LL2_TX_DEST_NW:
                tx_dest = CORE_TX_DEST_NW;
                break;
        case ECORE_LL2_TX_DEST_LB:
                tx_dest = CORE_TX_DEST_LB;
                break;
        case ECORE_LL2_TX_DEST_DROP:
                tx_dest = CORE_TX_DEST_DROP;
                break;
        default:
                tx_dest = CORE_TX_DEST_LB;
                break;
        }

        start_bd = (struct core_tx_bd*)ecore_chain_produce(p_tx_chain);

        if (ECORE_IS_IWARP_PERSONALITY(p_hwfn) &&
            (p_ll2->input.conn_type == ECORE_LL2_TYPE_OOO)) {
                start_bd->nw_vlan_or_lb_echo =
                        OSAL_CPU_TO_LE16(IWARP_LL2_IN_ORDER_TX_QUEUE);
        } else {
                start_bd->nw_vlan_or_lb_echo = OSAL_CPU_TO_LE16(pkt->vlan);
                if (OSAL_TEST_BIT(ECORE_MF_UFP_SPECIFIC, &p_hwfn->p_dev->mf_bits) &&
                    (p_ll2->input.conn_type == ECORE_LL2_TYPE_FCOE))
                        pkt->remove_stag = true;
        }

        SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
                  OSAL_CPU_TO_LE16(pkt->l4_hdr_offset_w));
        SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
        bd_data |= pkt->bd_flags;
        SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
        SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
        SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
        SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
        SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
        SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
        SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
                  !!(pkt->remove_stag));

        start_bd->bd_data.as_bitfield = OSAL_CPU_TO_LE16(bd_data);
        DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
        start_bd->nbytes = OSAL_CPU_TO_LE16(pkt->first_frag_len);

        DP_VERBOSE(p_hwfn, (ECORE_MSG_TX_QUEUED | ECORE_MSG_LL2),
                   "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
                   p_ll2->queue_id, p_ll2->cid, p_ll2->input.conn_type,
                   prod_idx, pkt->first_frag_len, pkt->num_of_bds,
                   OSAL_LE32_TO_CPU(start_bd->addr.hi),
                   OSAL_LE32_TO_CPU(start_bd->addr.lo));

        if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
                return;

        /* Need to provide the packet with additional BDs for frags */
        for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
             frag_idx < pkt->num_of_bds; frag_idx++) {
                struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;

                *p_bd = (struct core_tx_bd *)ecore_chain_produce(p_tx_chain);
                (*p_bd)->bd_data.as_bitfield = 0;
                (*p_bd)->bitfield1 = 0;
                p_curp->bds_set[frag_idx].tx_frag = 0;
                p_curp->bds_set[frag_idx].frag_len = 0;
        }
}

/* This should be called while the Txq spinlock is being held */
static void ecore_ll2_tx_packet_notify(struct ecore_hwfn *p_hwfn,
                                       struct ecore_ll2_info *p_ll2_conn)
{
        bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
        struct ecore_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
        struct ecore_ll2_tx_packet *p_pkt = OSAL_NULL;
        u16 bd_prod;

        /* If there are missing BDs, don't do anything now */
        if (p_ll2_conn->tx_queue.cur_send_frag_num !=
            p_ll2_conn->tx_queue.cur_send_packet->bd_used)
                return;

        /* Push the current packet to the list and clean after it */
        OSAL_LIST_PUSH_TAIL(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
                            &p_ll2_conn->tx_queue.sending_descq);
        p_ll2_conn->tx_queue.cur_send_packet = OSAL_NULL;
        p_ll2_conn->tx_queue.cur_send_frag_num = 0;

        /* Notify FW of packet only if requested to */
        if (!b_notify)
                return;

        bd_prod = ecore_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);

        while (!OSAL_LIST_IS_EMPTY(&p_tx->sending_descq)) {
                p_pkt = OSAL_LIST_FIRST_ENTRY(&p_tx->sending_descq,
                                              struct ecore_ll2_tx_packet,
                                              list_entry);
                if (p_pkt == OSAL_NULL)
                        break;
#if defined(_NTDDK_)
#pragma warning(suppress : 6011 28182)
#endif
                OSAL_LIST_REMOVE_ENTRY(&p_pkt->list_entry,
                                       &p_tx->sending_descq);
                OSAL_LIST_PUSH_TAIL(&p_pkt->list_entry, &p_tx->active_descq);
        }

        p_tx->db_msg.spq_prod = OSAL_CPU_TO_LE16(bd_prod);

        /* Make sure the BDs data is updated before ringing the doorbell */
        OSAL_WMB(p_hwfn->p_dev);

        //DIRECT_REG_WR(p_hwfn, p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
        DIRECT_REG_WR_DB(p_hwfn, p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));

        DP_VERBOSE(p_hwfn, (ECORE_MSG_TX_QUEUED | ECORE_MSG_LL2),
                   "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
                   p_ll2_conn->queue_id, p_ll2_conn->cid,
                   p_ll2_conn->input.conn_type,
                   p_tx->db_msg.spq_prod);
}

enum _ecore_status_t ecore_ll2_prepare_tx_packet(
                void *cxt,
                u8 connection_handle,
                struct ecore_ll2_tx_pkt_info *pkt,
                bool notify_fw)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct ecore_ll2_tx_packet *p_curp = OSAL_NULL;
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;
        struct ecore_ll2_tx_queue *p_tx;
        struct ecore_chain *p_tx_chain;
        unsigned long flags;
        enum _ecore_status_t rc = ECORE_SUCCESS;

        p_ll2_conn = ecore_ll2_handle_sanity(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return ECORE_INVAL;
        p_tx = &p_ll2_conn->tx_queue;
        p_tx_chain = &p_tx->txq_chain;

        if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
                return ECORE_IO; /* coalescing is requireed */

        OSAL_SPIN_LOCK_IRQSAVE(&p_tx->lock, flags);
        if (p_tx->cur_send_packet) {
                rc = ECORE_EXISTS;
                goto out;
        }

        /* Get entry, but only if we have tx elements for it */
        if (!OSAL_LIST_IS_EMPTY(&p_tx->free_descq))
                p_curp = OSAL_LIST_FIRST_ENTRY(&p_tx->free_descq,
                                               struct ecore_ll2_tx_packet,
                                               list_entry);
        if (p_curp && ecore_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
                p_curp = OSAL_NULL;

        if (!p_curp) {
                rc = ECORE_BUSY;
                goto out;
        }

        /* Prepare packet and BD, and perhaps send a doorbell to FW */
        ecore_ll2_prepare_tx_packet_set(p_tx, p_curp, pkt, notify_fw);

        ecore_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp,
                                           pkt);

        ecore_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);

out:
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_tx->lock, flags);
        return rc;
}

enum _ecore_status_t ecore_ll2_set_fragment_of_tx_packet(void *cxt,
                                                         u8 connection_handle,
                                                         dma_addr_t addr,
                                                         u16 nbytes)
{
        struct ecore_ll2_tx_packet *p_cur_send_packet = OSAL_NULL;
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;
        u16 cur_send_frag_num = 0;
        struct core_tx_bd *p_bd;
        unsigned long flags;

        p_ll2_conn = ecore_ll2_handle_sanity(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return ECORE_INVAL;

        if (!p_ll2_conn->tx_queue.cur_send_packet)
                return ECORE_INVAL;

        p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
        cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;

        if (cur_send_frag_num >= p_cur_send_packet->bd_used)
                return ECORE_INVAL;

        /* Fill the BD information, and possibly notify FW */
        p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
        DMA_REGPAIR_LE(p_bd->addr, addr);
        p_bd->nbytes = OSAL_CPU_TO_LE16(nbytes);
        p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
        p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;

        p_ll2_conn->tx_queue.cur_send_frag_num++;

        OSAL_SPIN_LOCK_IRQSAVE(&p_ll2_conn->tx_queue.lock, flags);
        ecore_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
        OSAL_SPIN_UNLOCK_IRQSAVE(&p_ll2_conn->tx_queue.lock, flags);

        return ECORE_SUCCESS;
}

enum _ecore_status_t ecore_ll2_terminate_connection(void *cxt,
                                                    u8 connection_handle)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;
        enum _ecore_status_t rc = ECORE_NOTIMPL;
        struct ecore_ptt *p_ptt;

        p_ptt = ecore_ptt_acquire(p_hwfn);
        if (!p_ptt)
                return ECORE_AGAIN;

        p_ll2_conn = ecore_ll2_handle_sanity_lock(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL) {
                rc = ECORE_INVAL;
                goto out;
        }

        /* Stop Tx & Rx of connection, if needed */
        if (ECORE_LL2_TX_REGISTERED(p_ll2_conn)) {
                rc = ecore_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
                if (rc != ECORE_SUCCESS)
                        goto out;
                ecore_ll2_txq_flush(p_hwfn, connection_handle);
        }

        if (ECORE_LL2_RX_REGISTERED(p_ll2_conn)) {
                rc = ecore_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
                if (rc)
                        goto out;
                ecore_ll2_rxq_flush(p_hwfn, connection_handle);
        }

        if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_OOO)
                ecore_ooo_release_all_isles(p_hwfn->p_ooo_info);

        if (p_ll2_conn->input.conn_type == ECORE_LL2_TYPE_FCOE) {
                if (!OSAL_TEST_BIT(ECORE_MF_UFP_SPECIFIC,
                                   &p_hwfn->p_dev->mf_bits))
                        ecore_llh_remove_protocol_filter(p_hwfn->p_dev, 0,
                                                         ECORE_LLH_FILTER_ETHERTYPE,
                                                         0x8906, 0);
                ecore_llh_remove_protocol_filter(p_hwfn->p_dev, 0,
                                                 ECORE_LLH_FILTER_ETHERTYPE,
                                                 0x8914, 0);
        }

out:
        ecore_ptt_release(p_hwfn, p_ptt);

        return rc;
}

static void ecore_ll2_release_connection_ooo(struct ecore_hwfn *p_hwfn,
                                             struct ecore_ll2_info *p_ll2_conn)
{
        struct ecore_ooo_buffer *p_buffer;

        if (p_ll2_conn->input.conn_type != ECORE_LL2_TYPE_OOO)
                return;

        ecore_ooo_release_all_isles(p_hwfn->p_ooo_info);
        while ((p_buffer = ecore_ooo_get_free_buffer(p_hwfn->p_ooo_info))) {
                OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev,
                                       p_buffer->rx_buffer_virt_addr,
                                       p_buffer->rx_buffer_phys_addr,
                                       p_buffer->rx_buffer_size);
                OSAL_FREE(p_hwfn->p_dev, p_buffer);
        }
}

void ecore_ll2_release_connection(void *cxt,
                                  u8 connection_handle)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;

        p_ll2_conn = ecore_ll2_handle_sanity(p_hwfn, connection_handle);
        if (p_ll2_conn == OSAL_NULL)
                return;

        if (ECORE_LL2_RX_REGISTERED(p_ll2_conn)) {
                p_ll2_conn->rx_queue.b_cb_registred = false;
                ecore_int_unregister_cb(p_hwfn,
                                        p_ll2_conn->rx_queue.rx_sb_index);
        }

        if (ECORE_LL2_TX_REGISTERED(p_ll2_conn)) {
                p_ll2_conn->tx_queue.b_cb_registred = false;
                ecore_int_unregister_cb(p_hwfn,
                                        p_ll2_conn->tx_queue.tx_sb_index);
        }

        OSAL_FREE(p_hwfn->p_dev, p_ll2_conn->tx_queue.descq_array);
        ecore_chain_free(p_hwfn->p_dev, &p_ll2_conn->tx_queue.txq_chain);

        OSAL_FREE(p_hwfn->p_dev, p_ll2_conn->rx_queue.descq_array);
        ecore_chain_free(p_hwfn->p_dev, &p_ll2_conn->rx_queue.rxq_chain);
        ecore_chain_free(p_hwfn->p_dev, &p_ll2_conn->rx_queue.rcq_chain);

        ecore_cxt_release_cid(p_hwfn, p_ll2_conn->cid);

        ecore_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);

        OSAL_MUTEX_ACQUIRE(&p_ll2_conn->mutex);
        p_ll2_conn->b_active = false;
        OSAL_MUTEX_RELEASE(&p_ll2_conn->mutex);
}

/* ECORE LL2: internal functions */

enum _ecore_status_t ecore_ll2_alloc(struct ecore_hwfn *p_hwfn)
{
        struct ecore_ll2_info *p_ll2_info;
        u8 i;

        /* Allocate LL2's set struct */
        p_ll2_info = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL,
                                 sizeof(struct ecore_ll2_info) *
                                 ECORE_MAX_NUM_OF_LL2_CONNECTIONS);
        if (!p_ll2_info) {
                DP_NOTICE(p_hwfn, false,
                          "Failed to allocate `struct ecore_ll2'\n");
                return ECORE_NOMEM;
        }

        p_hwfn->p_ll2_info = p_ll2_info;

        for (i = 0; i < ECORE_MAX_NUM_OF_LL2_CONNECTIONS; i++) {
#ifdef CONFIG_ECORE_LOCK_ALLOC
                if (OSAL_MUTEX_ALLOC(p_hwfn, &p_ll2_info[i].mutex))
                        goto handle_err;
                if (OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_ll2_info[i].rx_queue.lock))
                        goto handle_err;
                if (OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_ll2_info[i].tx_queue.lock))
                        goto handle_err;
#endif
                p_ll2_info[i].my_id = i;
        }

        return ECORE_SUCCESS;
#ifdef CONFIG_ECORE_LOCK_ALLOC
handle_err:
        ecore_ll2_free(p_hwfn);
        return ECORE_NOMEM;
#endif
}

void ecore_ll2_setup(struct ecore_hwfn *p_hwfn)
{
        int  i;

        for (i = 0; i < ECORE_MAX_NUM_OF_LL2_CONNECTIONS; i++)
                OSAL_MUTEX_INIT(&p_hwfn->p_ll2_info[i].mutex);
}

void ecore_ll2_free(struct ecore_hwfn *p_hwfn)
{
#ifdef CONFIG_ECORE_LOCK_ALLOC
        int i;
#endif
        if (!p_hwfn->p_ll2_info)
                return;

#ifdef CONFIG_ECORE_LOCK_ALLOC
        for (i = 0; i < ECORE_MAX_NUM_OF_LL2_CONNECTIONS; i++) {
                OSAL_SPIN_LOCK_DEALLOC(&p_hwfn->p_ll2_info[i].rx_queue.lock);
                OSAL_SPIN_LOCK_DEALLOC(&p_hwfn->p_ll2_info[i].tx_queue.lock);
                OSAL_MUTEX_DEALLOC(&p_hwfn->p_ll2_info[i].mutex);
        }
#endif
        OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_ll2_info);
        p_hwfn->p_ll2_info = OSAL_NULL;
}

static void _ecore_ll2_get_port_stats(struct ecore_hwfn *p_hwfn,
                                      struct ecore_ptt *p_ptt,
                                      struct ecore_ll2_stats *p_stats)
{
        struct core_ll2_port_stats port_stats;

        OSAL_MEMSET(&port_stats, 0, sizeof(port_stats));
        ecore_memcpy_from(p_hwfn, p_ptt, &port_stats,
                          BAR0_MAP_REG_TSDM_RAM +
                          TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
                          sizeof(port_stats));

        p_stats->gsi_invalid_hdr +=
                HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
        p_stats->gsi_invalid_pkt_length +=
                HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
        p_stats->gsi_unsupported_pkt_typ +=
                HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
        p_stats->gsi_crcchksm_error +=
                HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
}

static void _ecore_ll2_get_tstats(struct ecore_hwfn *p_hwfn,
                                  struct ecore_ptt *p_ptt,
                                  struct ecore_ll2_info *p_ll2_conn,
                                  struct ecore_ll2_stats *p_stats)
{
        struct core_ll2_tstorm_per_queue_stat tstats;
        u8 qid = p_ll2_conn->queue_id;
        u32 tstats_addr;

        OSAL_MEMSET(&tstats, 0, sizeof(tstats));
        tstats_addr = BAR0_MAP_REG_TSDM_RAM +
                      CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
        ecore_memcpy_from(p_hwfn, p_ptt, &tstats,
                          tstats_addr,
                          sizeof(tstats));

        p_stats->packet_too_big_discard +=
                HILO_64_REGPAIR(tstats.packet_too_big_discard);
        p_stats->no_buff_discard +=
                HILO_64_REGPAIR(tstats.no_buff_discard);
}

static void _ecore_ll2_get_ustats(struct ecore_hwfn *p_hwfn,
                                  struct ecore_ptt *p_ptt,
                                  struct ecore_ll2_info *p_ll2_conn,
                                  struct ecore_ll2_stats *p_stats)
{
        struct core_ll2_ustorm_per_queue_stat ustats;
        u8 qid = p_ll2_conn->queue_id;
        u32 ustats_addr;

        OSAL_MEMSET(&ustats, 0, sizeof(ustats));
        ustats_addr = BAR0_MAP_REG_USDM_RAM +
                      CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
        ecore_memcpy_from(p_hwfn, p_ptt, &ustats,
                          ustats_addr,
                          sizeof(ustats));

        p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
        p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
        p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
        p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
        p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
        p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
}

static void _ecore_ll2_get_pstats(struct ecore_hwfn *p_hwfn,
                                  struct ecore_ptt *p_ptt,
                                  struct ecore_ll2_info *p_ll2_conn,
                                  struct ecore_ll2_stats *p_stats)
{
        struct core_ll2_pstorm_per_queue_stat pstats;
        u8 stats_id = p_ll2_conn->tx_stats_id;
        u32 pstats_addr;

        OSAL_MEMSET(&pstats, 0, sizeof(pstats));
        pstats_addr = BAR0_MAP_REG_PSDM_RAM +
                      CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
        ecore_memcpy_from(p_hwfn, p_ptt, &pstats,
                          pstats_addr,
                          sizeof(pstats));

        p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
        p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
        p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
        p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
        p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
        p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
}

enum _ecore_status_t __ecore_ll2_get_stats(void *cxt,
                                           u8 connection_handle,
                                           struct ecore_ll2_stats *p_stats)
{
        struct ecore_hwfn *p_hwfn = (struct ecore_hwfn *)cxt;
        struct ecore_ll2_info *p_ll2_conn = OSAL_NULL;
        struct ecore_ptt *p_ptt;

        if ((connection_handle >= ECORE_MAX_NUM_OF_LL2_CONNECTIONS) ||
            !p_hwfn->p_ll2_info) {
                return ECORE_INVAL;
        }

        p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];

        p_ptt = ecore_ptt_acquire(p_hwfn);
        if (!p_ptt) {
                DP_ERR(p_hwfn, "Failed to acquire ptt\n");
                return ECORE_INVAL;
        }

        if (p_ll2_conn->input.gsi_enable)
                _ecore_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);

        _ecore_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);

        _ecore_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);

        if (p_ll2_conn->tx_stats_en)
                _ecore_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);

        ecore_ptt_release(p_hwfn, p_ptt);

        return ECORE_SUCCESS;
}

enum _ecore_status_t ecore_ll2_get_stats(void *cxt,
                                         u8 connection_handle,
                                         struct ecore_ll2_stats *p_stats)
{
        OSAL_MEMSET(p_stats, 0, sizeof(*p_stats));

        return __ecore_ll2_get_stats(cxt, connection_handle, p_stats);
}

/**/

#ifdef _NTDDK_
#pragma warning(pop)
#endif