/* bnx2x_sp.c: Qlogic Everest network driver.
 *
 * Copyright 2011-2013 Broadcom Corporation
 * Copyright (c) 2014 QLogic Corporation
 * All rights reserved
 *
 * Unless you and Qlogic execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2, available
 * at http://www.gnu.org/licenses/gpl-2.0.html (the "GPL").
 *
 * Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Qlogic software provided under a
 * license other than the GPL, without Qlogic's express prior written
 * consent.
 *
 * Maintained by: Ariel Elior <ariel.elior@qlogic.com>
 * Written by: Vladislav Zolotarov
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/crc32.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/crc32c.h>
#include "bnx2x.h"
#include "bnx2x_cmn.h"
#include "bnx2x_sp.h"

#define BNX2X_MAX_EMUL_MULTI            16

/**** Exe Queue interfaces ****/

/**
 * bnx2x_exe_queue_init - init the Exe Queue object
 *
 * @bp:         driver handle
 * @o:          pointer to the object
 * @exe_len:    length
 * @owner:      pointer to the owner
 * @validate:   validate function pointer
 * @remove:     remove function pointer
 * @optimize:   optimize function pointer
 * @exec:       execute function pointer
 * @get:        get function pointer
 */
static inline void bnx2x_exe_queue_init(struct bnx2x *bp,
                                        struct bnx2x_exe_queue_obj *o,
                                        int exe_len,
                                        union bnx2x_qable_obj *owner,
                                        exe_q_validate validate,
                                        exe_q_remove remove,
                                        exe_q_optimize optimize,
                                        exe_q_execute exec,
                                        exe_q_get get)
{
        memset(o, 0, sizeof(*o));

        INIT_LIST_HEAD(&o->exe_queue);
        INIT_LIST_HEAD(&o->pending_comp);

        spin_lock_init(&o->lock);

        o->exe_chunk_len = exe_len;
        o->owner         = owner;

        /* Owner specific callbacks */
        o->validate      = validate;
        o->remove        = remove;
        o->optimize      = optimize;
        o->execute       = exec;
        o->get           = get;

        DP(BNX2X_MSG_SP, "Setup the execution queue with the chunk length of %d\n",
           exe_len);
}

static inline void bnx2x_exe_queue_free_elem(struct bnx2x *bp,
                                             struct bnx2x_exeq_elem *elem)
{
        DP(BNX2X_MSG_SP, "Deleting an exe_queue element\n");
        kfree(elem);
}

static inline int bnx2x_exe_queue_length(struct bnx2x_exe_queue_obj *o)
{
        struct bnx2x_exeq_elem *elem;
        int cnt = 0;

        spin_lock_bh(&o->lock);

        list_for_each_entry(elem, &o->exe_queue, link)
                cnt++;

        spin_unlock_bh(&o->lock);

        return cnt;
}

/**
 * bnx2x_exe_queue_add - add a new element to the execution queue
 *
 * @bp:         driver handle
 * @o:          queue
 * @elem:       new command to add
 * @restore:    true - do not optimize the command
 *
 * If the element is optimized or is illegal, frees it.
 */
static inline int bnx2x_exe_queue_add(struct bnx2x *bp,
                                      struct bnx2x_exe_queue_obj *o,
                                      struct bnx2x_exeq_elem *elem,
                                      bool restore)
{
        int rc;

        spin_lock_bh(&o->lock);

        if (!restore) {
                /* Try to cancel this element queue */
                rc = o->optimize(bp, o->owner, elem);
                if (rc)
                        goto free_and_exit;

                /* Check if this request is ok */
                rc = o->validate(bp, o->owner, elem);
                if (rc) {
                        DP(BNX2X_MSG_SP, "Preamble failed: %d\n", rc);
                        goto free_and_exit;
                }
        }

        /* If so, add it to the execution queue */
        list_add_tail(&elem->link, &o->exe_queue);

        spin_unlock_bh(&o->lock);

        return 0;

free_and_exit:
        bnx2x_exe_queue_free_elem(bp, elem);

        spin_unlock_bh(&o->lock);

        return rc;
}

static inline void __bnx2x_exe_queue_reset_pending(
        struct bnx2x *bp,
        struct bnx2x_exe_queue_obj *o)
{
        struct bnx2x_exeq_elem *elem;

        while (!list_empty(&o->pending_comp)) {
                elem = list_first_entry(&o->pending_comp,
                                        struct bnx2x_exeq_elem, link);

                list_del(&elem->link);
                bnx2x_exe_queue_free_elem(bp, elem);
        }
}

/**
 * bnx2x_exe_queue_step - execute one execution chunk atomically
 *
 * @bp:                 driver handle
 * @o:                  queue
 * @ramrod_flags:       flags
 *
 * (Should be called while holding the exe_queue->lock).
 */
static inline int bnx2x_exe_queue_step(struct bnx2x *bp,
                                       struct bnx2x_exe_queue_obj *o,
                                       unsigned long *ramrod_flags)
{
        struct bnx2x_exeq_elem *elem, spacer;
        int cur_len = 0, rc;

        memset(&spacer, 0, sizeof(spacer));

        /* Next step should not be performed until the current is finished,
         * unless a DRV_CLEAR_ONLY bit is set. In this case we just want to
         * properly clear object internals without sending any command to the FW
         * which also implies there won't be any completion to clear the
         * 'pending' list.
         */
        if (!list_empty(&o->pending_comp)) {
                if (test_bit(RAMROD_DRV_CLR_ONLY, ramrod_flags)) {
                        DP(BNX2X_MSG_SP, "RAMROD_DRV_CLR_ONLY requested: resetting a pending_comp list\n");
                        __bnx2x_exe_queue_reset_pending(bp, o);
                } else {
                        return 1;
                }
        }

        /* Run through the pending commands list and create a next
         * execution chunk.
         */
        while (!list_empty(&o->exe_queue)) {
                elem = list_first_entry(&o->exe_queue, struct bnx2x_exeq_elem,
                                        link);
                WARN_ON(!elem->cmd_len);

                if (cur_len + elem->cmd_len <= o->exe_chunk_len) {
                        cur_len += elem->cmd_len;
                        /* Prevent from both lists being empty when moving an
                         * element. This will allow the call of
                         * bnx2x_exe_queue_empty() without locking.
                         */
                        list_add_tail(&spacer.link, &o->pending_comp);
                        mb();
                        list_move_tail(&elem->link, &o->pending_comp);
                        list_del(&spacer.link);
                } else
                        break;
        }

        /* Sanity check */
        if (!cur_len)
                return 0;

        rc = o->execute(bp, o->owner, &o->pending_comp, ramrod_flags);
        if (rc < 0)
                /* In case of an error return the commands back to the queue
                 * and reset the pending_comp.
                 */
                list_splice_init(&o->pending_comp, &o->exe_queue);
        else if (!rc)
                /* If zero is returned, means there are no outstanding pending
                 * completions and we may dismiss the pending list.
                 */
                __bnx2x_exe_queue_reset_pending(bp, o);

        return rc;
}

static inline bool bnx2x_exe_queue_empty(struct bnx2x_exe_queue_obj *o)
{
        bool empty = list_empty(&o->exe_queue);

        /* Don't reorder!!! */
        mb();

        return empty && list_empty(&o->pending_comp);
}

static inline struct bnx2x_exeq_elem *bnx2x_exe_queue_alloc_elem(
        struct bnx2x *bp)
{
        DP(BNX2X_MSG_SP, "Allocating a new exe_queue element\n");
        return kzalloc(sizeof(struct bnx2x_exeq_elem), GFP_ATOMIC);
}

/************************ raw_obj functions ***********************************/
static bool bnx2x_raw_check_pending(struct bnx2x_raw_obj *o)
{
        return !!test_bit(o->state, o->pstate);
}

static void bnx2x_raw_clear_pending(struct bnx2x_raw_obj *o)
{
        smp_mb__before_atomic();
        clear_bit(o->state, o->pstate);
        smp_mb__after_atomic();
}

static void bnx2x_raw_set_pending(struct bnx2x_raw_obj *o)
{
        smp_mb__before_atomic();
        set_bit(o->state, o->pstate);
        smp_mb__after_atomic();
}

/**
 * bnx2x_state_wait - wait until the given bit(state) is cleared
 *
 * @bp:         device handle
 * @state:      state which is to be cleared
 * @pstate:     state buffer
 *
 */
static inline int bnx2x_state_wait(struct bnx2x *bp, int state,
                                   unsigned long *pstate)
{
        /* can take a while if any port is running */
        int cnt = 5000;

        if (CHIP_REV_IS_EMUL(bp))
                cnt *= 20;

        DP(BNX2X_MSG_SP, "waiting for state to become %d\n", state);

        might_sleep();
        while (cnt--) {
                if (!test_bit(state, pstate)) {
#ifdef BNX2X_STOP_ON_ERROR
                        DP(BNX2X_MSG_SP, "exit  (cnt %d)\n", 5000 - cnt);
#endif
                        return 0;
                }

                usleep_range(1000, 2000);

                if (bp->panic)
                        return -EIO;
        }

        /* timeout! */
        BNX2X_ERR("timeout waiting for state %d\n", state);
#ifdef BNX2X_STOP_ON_ERROR
        bnx2x_panic();
#endif

        return -EBUSY;
}

static int bnx2x_raw_wait(struct bnx2x *bp, struct bnx2x_raw_obj *raw)
{
        return bnx2x_state_wait(bp, raw->state, raw->pstate);
}

/***************** Classification verbs: Set/Del MAC/VLAN/VLAN-MAC ************/
/* credit handling callbacks */
static bool bnx2x_get_cam_offset_mac(struct bnx2x_vlan_mac_obj *o, int *offset)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;

        WARN_ON(!mp);

        return mp->get_entry(mp, offset);
}

static bool bnx2x_get_credit_mac(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;

        WARN_ON(!mp);

        return mp->get(mp, 1);
}

static bool bnx2x_get_cam_offset_vlan(struct bnx2x_vlan_mac_obj *o, int *offset)
{
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        WARN_ON(!vp);

        return vp->get_entry(vp, offset);
}

static bool bnx2x_get_credit_vlan(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        WARN_ON(!vp);

        return vp->get(vp, 1);
}

static bool bnx2x_get_credit_vlan_mac(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        if (!mp->get(mp, 1))
                return false;

        if (!vp->get(vp, 1)) {
                mp->put(mp, 1);
                return false;
        }

        return true;
}

static bool bnx2x_put_cam_offset_mac(struct bnx2x_vlan_mac_obj *o, int offset)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;

        return mp->put_entry(mp, offset);
}

static bool bnx2x_put_credit_mac(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;

        return mp->put(mp, 1);
}

static bool bnx2x_put_cam_offset_vlan(struct bnx2x_vlan_mac_obj *o, int offset)
{
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        return vp->put_entry(vp, offset);
}

static bool bnx2x_put_credit_vlan(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        return vp->put(vp, 1);
}

static bool bnx2x_put_credit_vlan_mac(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_credit_pool_obj *mp = o->macs_pool;
        struct bnx2x_credit_pool_obj *vp = o->vlans_pool;

        if (!mp->put(mp, 1))
                return false;

        if (!vp->put(vp, 1)) {
                mp->get(mp, 1);
                return false;
        }

        return true;
}

/**
 * __bnx2x_vlan_mac_h_write_trylock - try getting the vlan mac writer lock
 *
 * @bp:         device handle
 * @o:          vlan_mac object
 *
 * Context: Non-blocking implementation; should be called under execution
 *          queue lock.
 */
static int __bnx2x_vlan_mac_h_write_trylock(struct bnx2x *bp,
                                            struct bnx2x_vlan_mac_obj *o)
{
        if (o->head_reader) {
                DP(BNX2X_MSG_SP, "vlan_mac_lock writer - There are readers; Busy\n");
                return -EBUSY;
        }

        DP(BNX2X_MSG_SP, "vlan_mac_lock writer - Taken\n");
        return 0;
}

/**
 * __bnx2x_vlan_mac_h_exec_pending - execute step instead of a previous step
 *
 * @bp:         device handle
 * @o:          vlan_mac object
 *
 * details Should be called under execution queue lock; notice it might release
 *          and reclaim it during its run.
 */
static void __bnx2x_vlan_mac_h_exec_pending(struct bnx2x *bp,
                                            struct bnx2x_vlan_mac_obj *o)
{
        int rc;
        unsigned long ramrod_flags = o->saved_ramrod_flags;

        DP(BNX2X_MSG_SP, "vlan_mac_lock execute pending command with ramrod flags %lu\n",
           ramrod_flags);
        o->head_exe_request = false;
        o->saved_ramrod_flags = 0;
        rc = bnx2x_exe_queue_step(bp, &o->exe_queue, &ramrod_flags);
        if ((rc != 0) && (rc != 1)) {
                BNX2X_ERR("execution of pending commands failed with rc %d\n",
                          rc);
#ifdef BNX2X_STOP_ON_ERROR
                bnx2x_panic();
#endif
        }
}

/**
 * __bnx2x_vlan_mac_h_pend - Pend an execution step which couldn't run
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 * @ramrod_flags:       ramrod flags of missed execution
 *
 * Context: Should be called under execution queue lock.
 */
static void __bnx2x_vlan_mac_h_pend(struct bnx2x *bp,
                                    struct bnx2x_vlan_mac_obj *o,
                                    unsigned long ramrod_flags)
{
        o->head_exe_request = true;
        o->saved_ramrod_flags = ramrod_flags;
        DP(BNX2X_MSG_SP, "Placing pending execution with ramrod flags %lu\n",
           ramrod_flags);
}

/**
 * __bnx2x_vlan_mac_h_write_unlock - unlock the vlan mac head list writer lock
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 *
 * Context: Should be called under execution queue lock. Notice if a pending
 *          execution exists, it would perform it - possibly releasing and
 *          reclaiming the execution queue lock.
 */
static void __bnx2x_vlan_mac_h_write_unlock(struct bnx2x *bp,
                                            struct bnx2x_vlan_mac_obj *o)
{
        /* It's possible a new pending execution was added since this writer
         * executed. If so, execute again. [Ad infinitum]
         */
        while (o->head_exe_request) {
                DP(BNX2X_MSG_SP, "vlan_mac_lock - writer release encountered a pending request\n");
                __bnx2x_vlan_mac_h_exec_pending(bp, o);
        }
}


/**
 * __bnx2x_vlan_mac_h_read_lock - lock the vlan mac head list reader lock
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 *
 * Context: Should be called under the execution queue lock. May sleep. May
 *          release and reclaim execution queue lock during its run.
 */
static int __bnx2x_vlan_mac_h_read_lock(struct bnx2x *bp,
                                        struct bnx2x_vlan_mac_obj *o)
{
        /* If we got here, we're holding lock --> no WRITER exists */
        o->head_reader++;
        DP(BNX2X_MSG_SP, "vlan_mac_lock - locked reader - number %d\n",
           o->head_reader);

        return 0;
}

/**
 * bnx2x_vlan_mac_h_read_lock - lock the vlan mac head list reader lock
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 *
 * Context: May sleep. Claims and releases execution queue lock during its run.
 */
int bnx2x_vlan_mac_h_read_lock(struct bnx2x *bp,
                               struct bnx2x_vlan_mac_obj *o)
{
        int rc;

        spin_lock_bh(&o->exe_queue.lock);
        rc = __bnx2x_vlan_mac_h_read_lock(bp, o);
        spin_unlock_bh(&o->exe_queue.lock);

        return rc;
}

/**
 * __bnx2x_vlan_mac_h_read_unlock - unlock the vlan mac head list reader lock
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 *
 * Context: Should be called under execution queue lock. Notice if a pending
 *          execution exists, it would be performed if this was the last
 *          reader. possibly releasing and reclaiming the execution queue lock.
 */
static void __bnx2x_vlan_mac_h_read_unlock(struct bnx2x *bp,
                                          struct bnx2x_vlan_mac_obj *o)
{
        if (!o->head_reader) {
                BNX2X_ERR("Need to release vlan mac reader lock, but lock isn't taken\n");
#ifdef BNX2X_STOP_ON_ERROR
                bnx2x_panic();
#endif
        } else {
                o->head_reader--;
                DP(BNX2X_MSG_SP, "vlan_mac_lock - decreased readers to %d\n",
                   o->head_reader);
        }

        /* It's possible a new pending execution was added, and that this reader
         * was last - if so we need to execute the command.
         */
        if (!o->head_reader && o->head_exe_request) {
                DP(BNX2X_MSG_SP, "vlan_mac_lock - reader release encountered a pending request\n");

                /* Writer release will do the trick */
                __bnx2x_vlan_mac_h_write_unlock(bp, o);
        }
}

/**
 * bnx2x_vlan_mac_h_read_unlock - unlock the vlan mac head list reader lock
 *
 * @bp:                 device handle
 * @o:                  vlan_mac object
 *
 * Context: Notice if a pending execution exists, it would be performed if this
 *          was the last reader. Claims and releases the execution queue lock
 *          during its run.
 */
void bnx2x_vlan_mac_h_read_unlock(struct bnx2x *bp,
                                  struct bnx2x_vlan_mac_obj *o)
{
        spin_lock_bh(&o->exe_queue.lock);
        __bnx2x_vlan_mac_h_read_unlock(bp, o);
        spin_unlock_bh(&o->exe_queue.lock);
}

static int bnx2x_get_n_elements(struct bnx2x *bp, struct bnx2x_vlan_mac_obj *o,
                                int n, u8 *base, u8 stride, u8 size)
{
        struct bnx2x_vlan_mac_registry_elem *pos;
        u8 *next = base;
        int counter = 0;
        int read_lock;

        DP(BNX2X_MSG_SP, "get_n_elements - taking vlan_mac_lock (reader)\n");
        read_lock = bnx2x_vlan_mac_h_read_lock(bp, o);
        if (read_lock != 0)
                BNX2X_ERR("get_n_elements failed to get vlan mac reader lock; Access without lock\n");

        /* traverse list */
        list_for_each_entry(pos, &o->head, link) {
                if (counter < n) {
                        memcpy(next, &pos->u, size);
                        counter++;
                        DP(BNX2X_MSG_SP, "copied element number %d to address %p element was:\n",
                           counter, next);
                        next += stride + size;
                }
        }

        if (read_lock == 0) {
                DP(BNX2X_MSG_SP, "get_n_elements - releasing vlan_mac_lock (reader)\n");
                bnx2x_vlan_mac_h_read_unlock(bp, o);
        }

        return counter * ETH_ALEN;
}

/* check_add() callbacks */
static int bnx2x_check_mac_add(struct bnx2x *bp,
                               struct bnx2x_vlan_mac_obj *o,
                               union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking MAC %pM for ADD command\n", data->mac.mac);

        if (!is_valid_ether_addr(data->mac.mac))
                return -EINVAL;

        /* Check if a requested MAC already exists */
        list_for_each_entry(pos, &o->head, link)
                if (ether_addr_equal(data->mac.mac, pos->u.mac.mac) &&
                    (data->mac.is_inner_mac == pos->u.mac.is_inner_mac))
                        return -EEXIST;

        return 0;
}

static int bnx2x_check_vlan_add(struct bnx2x *bp,
                                struct bnx2x_vlan_mac_obj *o,
                                union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking VLAN %d for ADD command\n", data->vlan.vlan);

        list_for_each_entry(pos, &o->head, link)
                if (data->vlan.vlan == pos->u.vlan.vlan)
                        return -EEXIST;

        return 0;
}

static int bnx2x_check_vlan_mac_add(struct bnx2x *bp,
                                    struct bnx2x_vlan_mac_obj *o,
                                   union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking VLAN_MAC (%pM, %d) for ADD command\n",
           data->vlan_mac.mac, data->vlan_mac.vlan);

        list_for_each_entry(pos, &o->head, link)
                if ((data->vlan_mac.vlan == pos->u.vlan_mac.vlan) &&
                    (!memcmp(data->vlan_mac.mac, pos->u.vlan_mac.mac,
                                  ETH_ALEN)) &&
                    (data->vlan_mac.is_inner_mac ==
                     pos->u.vlan_mac.is_inner_mac))
                        return -EEXIST;

        return 0;
}

/* check_del() callbacks */
static struct bnx2x_vlan_mac_registry_elem *
        bnx2x_check_mac_del(struct bnx2x *bp,
                            struct bnx2x_vlan_mac_obj *o,
                            union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking MAC %pM for DEL command\n", data->mac.mac);

        list_for_each_entry(pos, &o->head, link)
                if (ether_addr_equal(data->mac.mac, pos->u.mac.mac) &&
                    (data->mac.is_inner_mac == pos->u.mac.is_inner_mac))
                        return pos;

        return NULL;
}

static struct bnx2x_vlan_mac_registry_elem *
        bnx2x_check_vlan_del(struct bnx2x *bp,
                             struct bnx2x_vlan_mac_obj *o,
                             union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking VLAN %d for DEL command\n", data->vlan.vlan);

        list_for_each_entry(pos, &o->head, link)
                if (data->vlan.vlan == pos->u.vlan.vlan)
                        return pos;

        return NULL;
}

static struct bnx2x_vlan_mac_registry_elem *
        bnx2x_check_vlan_mac_del(struct bnx2x *bp,
                                 struct bnx2x_vlan_mac_obj *o,
                                 union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;

        DP(BNX2X_MSG_SP, "Checking VLAN_MAC (%pM, %d) for DEL command\n",
           data->vlan_mac.mac, data->vlan_mac.vlan);

        list_for_each_entry(pos, &o->head, link)
                if ((data->vlan_mac.vlan == pos->u.vlan_mac.vlan) &&
                    (!memcmp(data->vlan_mac.mac, pos->u.vlan_mac.mac,
                             ETH_ALEN)) &&
                    (data->vlan_mac.is_inner_mac ==
                     pos->u.vlan_mac.is_inner_mac))
                        return pos;

        return NULL;
}

/* check_move() callback */
static bool bnx2x_check_move(struct bnx2x *bp,
                             struct bnx2x_vlan_mac_obj *src_o,
                             struct bnx2x_vlan_mac_obj *dst_o,
                             union bnx2x_classification_ramrod_data *data)
{
        struct bnx2x_vlan_mac_registry_elem *pos;
        int rc;

        /* Check if we can delete the requested configuration from the first
         * object.
         */
        pos = src_o->check_del(bp, src_o, data);

        /*  check if configuration can be added */
        rc = dst_o->check_add(bp, dst_o, data);

        /* If this classification can not be added (is already set)
         * or can't be deleted - return an error.
         */
        if (rc || !pos)
                return false;

        return true;
}

static bool bnx2x_check_move_always_err(
        struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *src_o,
        struct bnx2x_vlan_mac_obj *dst_o,
        union bnx2x_classification_ramrod_data *data)
{
        return false;
}

static inline u8 bnx2x_vlan_mac_get_rx_tx_flag(struct bnx2x_vlan_mac_obj *o)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        u8 rx_tx_flag = 0;

        if ((raw->obj_type == BNX2X_OBJ_TYPE_TX) ||
            (raw->obj_type == BNX2X_OBJ_TYPE_RX_TX))
                rx_tx_flag |= ETH_CLASSIFY_CMD_HEADER_TX_CMD;

        if ((raw->obj_type == BNX2X_OBJ_TYPE_RX) ||
            (raw->obj_type == BNX2X_OBJ_TYPE_RX_TX))
                rx_tx_flag |= ETH_CLASSIFY_CMD_HEADER_RX_CMD;

        return rx_tx_flag;
}

static void bnx2x_set_mac_in_nig(struct bnx2x *bp,
                                 bool add, unsigned char *dev_addr, int index)
{
        u32 wb_data[2];
        u32 reg_offset = BP_PORT(bp) ? NIG_REG_LLH1_FUNC_MEM :
                         NIG_REG_LLH0_FUNC_MEM;

        if (!IS_MF_SI(bp) && !IS_MF_AFEX(bp))
                return;

        if (index > BNX2X_LLH_CAM_MAX_PF_LINE)
                return;

        DP(BNX2X_MSG_SP, "Going to %s LLH configuration at entry %d\n",
                         (add ? "ADD" : "DELETE"), index);

        if (add) {
                /* LLH_FUNC_MEM is a u64 WB register */
                reg_offset += 8*index;

                wb_data[0] = ((dev_addr[2] << 24) | (dev_addr[3] << 16) |
                              (dev_addr[4] <<  8) |  dev_addr[5]);
                wb_data[1] = ((dev_addr[0] <<  8) |  dev_addr[1]);

                REG_WR_DMAE(bp, reg_offset, wb_data, 2);
        }

        REG_WR(bp, (BP_PORT(bp) ? NIG_REG_LLH1_FUNC_MEM_ENABLE :
                                  NIG_REG_LLH0_FUNC_MEM_ENABLE) + 4*index, add);
}

/**
 * bnx2x_vlan_mac_set_cmd_hdr_e2 - set a header in a single classify ramrod
 *
 * @bp:         device handle
 * @o:          queue for which we want to configure this rule
 * @add:        if true the command is an ADD command, DEL otherwise
 * @opcode:     CLASSIFY_RULE_OPCODE_XXX
 * @hdr:        pointer to a header to setup
 *
 */
static inline void bnx2x_vlan_mac_set_cmd_hdr_e2(struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *o, bool add, int opcode,
        struct eth_classify_cmd_header *hdr)
{
        struct bnx2x_raw_obj *raw = &o->raw;

        hdr->client_id = raw->cl_id;
        hdr->func_id = raw->func_id;

        /* Rx or/and Tx (internal switching) configuration ? */
        hdr->cmd_general_data |=
                bnx2x_vlan_mac_get_rx_tx_flag(o);

        if (add)
                hdr->cmd_general_data |= ETH_CLASSIFY_CMD_HEADER_IS_ADD;

        hdr->cmd_general_data |=
                (opcode << ETH_CLASSIFY_CMD_HEADER_OPCODE_SHIFT);
}

/**
 * bnx2x_vlan_mac_set_rdata_hdr_e2 - set the classify ramrod data header
 *
 * @cid:        connection id
 * @type:       BNX2X_FILTER_XXX_PENDING
 * @hdr:        pointer to header to setup
 * @rule_cnt:
 *
 * currently we always configure one rule and echo field to contain a CID and an
 * opcode type.
 */
static inline void bnx2x_vlan_mac_set_rdata_hdr_e2(u32 cid, int type,
                                struct eth_classify_header *hdr, int rule_cnt)
{
        hdr->echo = cpu_to_le32((cid & BNX2X_SWCID_MASK) |
                                (type << BNX2X_SWCID_SHIFT));
        hdr->rule_cnt = (u8)rule_cnt;
}

/* hw_config() callbacks */
static void bnx2x_set_one_mac_e2(struct bnx2x *bp,
                                 struct bnx2x_vlan_mac_obj *o,
                                 struct bnx2x_exeq_elem *elem, int rule_idx,
                                 int cam_offset)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        struct eth_classify_rules_ramrod_data *data =
                (struct eth_classify_rules_ramrod_data *)(raw->rdata);
        int rule_cnt = rule_idx + 1, cmd = elem->cmd_data.vlan_mac.cmd;
        union eth_classify_rule_cmd *rule_entry = &data->rules[rule_idx];
        bool add = (cmd == BNX2X_VLAN_MAC_ADD) ? true : false;
        unsigned long *vlan_mac_flags = &elem->cmd_data.vlan_mac.vlan_mac_flags;
        u8 *mac = elem->cmd_data.vlan_mac.u.mac.mac;

        /* Set LLH CAM entry: currently only iSCSI and ETH macs are
         * relevant. In addition, current implementation is tuned for a
         * single ETH MAC.
         *
         * When multiple unicast ETH MACs PF configuration in switch
         * independent mode is required (NetQ, multiple netdev MACs,
         * etc.), consider better utilisation of 8 per function MAC
         * entries in the LLH register. There is also
         * NIG_REG_P[01]_LLH_FUNC_MEM2 registers that complete the
         * total number of CAM entries to 16.
         *
         * Currently we won't configure NIG for MACs other than a primary ETH
         * MAC and iSCSI L2 MAC.
         *
         * If this MAC is moving from one Queue to another, no need to change
         * NIG configuration.
         */
        if (cmd != BNX2X_VLAN_MAC_MOVE) {
                if (test_bit(BNX2X_ISCSI_ETH_MAC, vlan_mac_flags))
                        bnx2x_set_mac_in_nig(bp, add, mac,
                                             BNX2X_LLH_CAM_ISCSI_ETH_LINE);
                else if (test_bit(BNX2X_ETH_MAC, vlan_mac_flags))
                        bnx2x_set_mac_in_nig(bp, add, mac,
                                             BNX2X_LLH_CAM_ETH_LINE);
        }

        /* Reset the ramrod data buffer for the first rule */
        if (rule_idx == 0)
                memset(data, 0, sizeof(*data));

        /* Setup a command header */
        bnx2x_vlan_mac_set_cmd_hdr_e2(bp, o, add, CLASSIFY_RULE_OPCODE_MAC,
                                      &rule_entry->mac.header);

        DP(BNX2X_MSG_SP, "About to %s MAC %pM for Queue %d\n",
           (add ? "add" : "delete"), mac, raw->cl_id);

        /* Set a MAC itself */
        bnx2x_set_fw_mac_addr(&rule_entry->mac.mac_msb,
                              &rule_entry->mac.mac_mid,
                              &rule_entry->mac.mac_lsb, mac);
        rule_entry->mac.inner_mac =
                cpu_to_le16(elem->cmd_data.vlan_mac.u.mac.is_inner_mac);

        /* MOVE: Add a rule that will add this MAC to the target Queue */
        if (cmd == BNX2X_VLAN_MAC_MOVE) {
                rule_entry++;
                rule_cnt++;

                /* Setup ramrod data */
                bnx2x_vlan_mac_set_cmd_hdr_e2(bp,
                                        elem->cmd_data.vlan_mac.target_obj,
                                              true, CLASSIFY_RULE_OPCODE_MAC,
                                              &rule_entry->mac.header);

                /* Set a MAC itself */
                bnx2x_set_fw_mac_addr(&rule_entry->mac.mac_msb,
                                      &rule_entry->mac.mac_mid,
                                      &rule_entry->mac.mac_lsb, mac);
                rule_entry->mac.inner_mac =
                        cpu_to_le16(elem->cmd_data.vlan_mac.
                                                u.mac.is_inner_mac);
        }

        /* Set the ramrod data header */
        /* TODO: take this to the higher level in order to prevent multiple
                 writing */
        bnx2x_vlan_mac_set_rdata_hdr_e2(raw->cid, raw->state, &data->header,
                                        rule_cnt);
}

/**
 * bnx2x_vlan_mac_set_rdata_hdr_e1x - set a header in a single classify ramrod
 *
 * @bp:         device handle
 * @o:          queue
 * @type:       the type of echo
 * @cam_offset: offset in cam memory
 * @hdr:        pointer to a header to setup
 *
 * E1/E1H
 */
static inline void bnx2x_vlan_mac_set_rdata_hdr_e1x(struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *o, int type, int cam_offset,
        struct mac_configuration_hdr *hdr)
{
        struct bnx2x_raw_obj *r = &o->raw;

        hdr->length = 1;
        hdr->offset = (u8)cam_offset;
        hdr->client_id = cpu_to_le16(0xff);
        hdr->echo = cpu_to_le32((r->cid & BNX2X_SWCID_MASK) |
                                (type << BNX2X_SWCID_SHIFT));
}

static inline void bnx2x_vlan_mac_set_cfg_entry_e1x(struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *o, bool add, int opcode, u8 *mac,
        u16 vlan_id, struct mac_configuration_entry *cfg_entry)
{
        struct bnx2x_raw_obj *r = &o->raw;
        u32 cl_bit_vec = (1 << r->cl_id);

        cfg_entry->clients_bit_vector = cpu_to_le32(cl_bit_vec);
        cfg_entry->pf_id = r->func_id;

        cfg_entry->vlan_id = cpu_to_le16(vlan_id);

        if (add) {
                SET_FLAG(cfg_entry->flags, MAC_CONFIGURATION_ENTRY_ACTION_TYPE,
                         T_ETH_MAC_COMMAND_SET);
                SET_FLAG(cfg_entry->flags,
                         MAC_CONFIGURATION_ENTRY_VLAN_FILTERING_MODE, opcode);

                /* Set a MAC in a ramrod data */
                bnx2x_set_fw_mac_addr(&cfg_entry->msb_mac_addr,
                                      &cfg_entry->middle_mac_addr,
                                      &cfg_entry->lsb_mac_addr, mac);
        } else
                SET_FLAG(cfg_entry->flags, MAC_CONFIGURATION_ENTRY_ACTION_TYPE,
                         T_ETH_MAC_COMMAND_INVALIDATE);
}

static inline void bnx2x_vlan_mac_set_rdata_e1x(struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *o, int type, int cam_offset, bool add,
        u8 *mac, u16 vlan_id, int opcode, struct mac_configuration_cmd *config)
{
        struct mac_configuration_entry *cfg_entry = &config->config_table[0];
        struct bnx2x_raw_obj *raw = &o->raw;

        bnx2x_vlan_mac_set_rdata_hdr_e1x(bp, o, type, cam_offset,
                                         &config->hdr);
        bnx2x_vlan_mac_set_cfg_entry_e1x(bp, o, add, opcode, mac, vlan_id,
                                         cfg_entry);

        DP(BNX2X_MSG_SP, "%s MAC %pM CLID %d CAM offset %d\n",
                         (add ? "setting" : "clearing"),
                         mac, raw->cl_id, cam_offset);
}

/**
 * bnx2x_set_one_mac_e1x - fill a single MAC rule ramrod data
 *
 * @bp:         device handle
 * @o:          bnx2x_vlan_mac_obj
 * @elem:       bnx2x_exeq_elem
 * @rule_idx:   rule_idx
 * @cam_offset: cam_offset
 */
static void bnx2x_set_one_mac_e1x(struct bnx2x *bp,
                                  struct bnx2x_vlan_mac_obj *o,
                                  struct bnx2x_exeq_elem *elem, int rule_idx,
                                  int cam_offset)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        struct mac_configuration_cmd *config =
                (struct mac_configuration_cmd *)(raw->rdata);
        /* 57710 and 57711 do not support MOVE command,
         * so it's either ADD or DEL
         */
        bool add = (elem->cmd_data.vlan_mac.cmd == BNX2X_VLAN_MAC_ADD) ?
                true : false;

        /* Reset the ramrod data buffer */
        memset(config, 0, sizeof(*config));

        bnx2x_vlan_mac_set_rdata_e1x(bp, o, raw->state,
                                     cam_offset, add,
                                     elem->cmd_data.vlan_mac.u.mac.mac, 0,
                                     ETH_VLAN_FILTER_ANY_VLAN, config);
}

static void bnx2x_set_one_vlan_e2(struct bnx2x *bp,
                                  struct bnx2x_vlan_mac_obj *o,
                                  struct bnx2x_exeq_elem *elem, int rule_idx,
                                  int cam_offset)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        struct eth_classify_rules_ramrod_data *data =
                (struct eth_classify_rules_ramrod_data *)(raw->rdata);
        int rule_cnt = rule_idx + 1;
        union eth_classify_rule_cmd *rule_entry = &data->rules[rule_idx];
        enum bnx2x_vlan_mac_cmd cmd = elem->cmd_data.vlan_mac.cmd;
        bool add = (cmd == BNX2X_VLAN_MAC_ADD) ? true : false;
        u16 vlan = elem->cmd_data.vlan_mac.u.vlan.vlan;

        /* Reset the ramrod data buffer for the first rule */
        if (rule_idx == 0)
                memset(data, 0, sizeof(*data));

        /* Set a rule header */
        bnx2x_vlan_mac_set_cmd_hdr_e2(bp, o, add, CLASSIFY_RULE_OPCODE_VLAN,
                                      &rule_entry->vlan.header);

        DP(BNX2X_MSG_SP, "About to %s VLAN %d\n", (add ? "add" : "delete"),
                         vlan);

        /* Set a VLAN itself */
        rule_entry->vlan.vlan = cpu_to_le16(vlan);

        /* MOVE: Add a rule that will add this MAC to the target Queue */
        if (cmd == BNX2X_VLAN_MAC_MOVE) {
                rule_entry++;
                rule_cnt++;

                /* Setup ramrod data */
                bnx2x_vlan_mac_set_cmd_hdr_e2(bp,
                                        elem->cmd_data.vlan_mac.target_obj,
                                              true, CLASSIFY_RULE_OPCODE_VLAN,
                                              &rule_entry->vlan.header);

                /* Set a VLAN itself */
                rule_entry->vlan.vlan = cpu_to_le16(vlan);
        }

        /* Set the ramrod data header */
        /* TODO: take this to the higher level in order to prevent multiple
                 writing */
        bnx2x_vlan_mac_set_rdata_hdr_e2(raw->cid, raw->state, &data->header,
                                        rule_cnt);
}

static void bnx2x_set_one_vlan_mac_e2(struct bnx2x *bp,
                                      struct bnx2x_vlan_mac_obj *o,
                                      struct bnx2x_exeq_elem *elem,
                                      int rule_idx, int cam_offset)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        struct eth_classify_rules_ramrod_data *data =
                (struct eth_classify_rules_ramrod_data *)(raw->rdata);
        int rule_cnt = rule_idx + 1;
        union eth_classify_rule_cmd *rule_entry = &data->rules[rule_idx];
        enum bnx2x_vlan_mac_cmd cmd = elem->cmd_data.vlan_mac.cmd;
        bool add = (cmd == BNX2X_VLAN_MAC_ADD) ? true : false;
        u16 vlan = elem->cmd_data.vlan_mac.u.vlan_mac.vlan;
        u8 *mac = elem->cmd_data.vlan_mac.u.vlan_mac.mac;
        u16 inner_mac;

        /* Reset the ramrod data buffer for the first rule */
        if (rule_idx == 0)
                memset(data, 0, sizeof(*data));

        /* Set a rule header */
        bnx2x_vlan_mac_set_cmd_hdr_e2(bp, o, add, CLASSIFY_RULE_OPCODE_PAIR,
                                      &rule_entry->pair.header);

        /* Set VLAN and MAC themselves */
        rule_entry->pair.vlan = cpu_to_le16(vlan);
        bnx2x_set_fw_mac_addr(&rule_entry->pair.mac_msb,
                              &rule_entry->pair.mac_mid,
                              &rule_entry->pair.mac_lsb, mac);
        inner_mac = elem->cmd_data.vlan_mac.u.vlan_mac.is_inner_mac;
        rule_entry->pair.inner_mac = cpu_to_le16(inner_mac);
        /* MOVE: Add a rule that will add this MAC/VLAN to the target Queue */
        if (cmd == BNX2X_VLAN_MAC_MOVE) {
                struct bnx2x_vlan_mac_obj *target_obj;

                rule_entry++;
                rule_cnt++;

                /* Setup ramrod data */
                target_obj = elem->cmd_data.vlan_mac.target_obj;
                bnx2x_vlan_mac_set_cmd_hdr_e2(bp, target_obj,
                                              true, CLASSIFY_RULE_OPCODE_PAIR,
                                              &rule_entry->pair.header);

                /* Set a VLAN itself */
                rule_entry->pair.vlan = cpu_to_le16(vlan);
                bnx2x_set_fw_mac_addr(&rule_entry->pair.mac_msb,
                                      &rule_entry->pair.mac_mid,
                                      &rule_entry->pair.mac_lsb, mac);
                rule_entry->pair.inner_mac = cpu_to_le16(inner_mac);
        }

        /* Set the ramrod data header */
        bnx2x_vlan_mac_set_rdata_hdr_e2(raw->cid, raw->state, &data->header,
                                        rule_cnt);
}

/**
 * bnx2x_set_one_vlan_mac_e1h -
 *
 * @bp:         device handle
 * @o:          bnx2x_vlan_mac_obj
 * @elem:       bnx2x_exeq_elem
 * @rule_idx:   rule_idx
 * @cam_offset: cam_offset
 */
static void bnx2x_set_one_vlan_mac_e1h(struct bnx2x *bp,
                                       struct bnx2x_vlan_mac_obj *o,
                                       struct bnx2x_exeq_elem *elem,
                                       int rule_idx, int cam_offset)
{
        struct bnx2x_raw_obj *raw = &o->raw;
        struct mac_configuration_cmd *config =
                (struct mac_configuration_cmd *)(raw->rdata);
        /* 57710 and 57711 do not support MOVE command,
         * so it's either ADD or DEL
         */
        bool add = (elem->cmd_data.vlan_mac.cmd == BNX2X_VLAN_MAC_ADD) ?
                true : false;

        /* Reset the ramrod data buffer */
        memset(config, 0, sizeof(*config));

        bnx2x_vlan_mac_set_rdata_e1x(bp, o, BNX2X_FILTER_VLAN_MAC_PENDING,
                                     cam_offset, add,
                                     elem->cmd_data.vlan_mac.u.vlan_mac.mac,
                                     elem->cmd_data.vlan_mac.u.vlan_mac.vlan,
                                     ETH_VLAN_FILTER_CLASSIFY, config);
}

/**
 * bnx2x_vlan_mac_restore - reconfigure next MAC/VLAN/VLAN-MAC element
 *
 * @bp:         device handle
 * @p:          command parameters
 * @ppos:       pointer to the cookie
 *
 * reconfigure next MAC/VLAN/VLAN-MAC element from the
 * previously configured elements list.
 *
 * from command parameters only RAMROD_COMP_WAIT bit in ramrod_flags is taken
 * into an account
 *
 * pointer to the cookie  - that should be given back in the next call to make
 * function handle the next element. If *ppos is set to NULL it will restart the
 * iterator. If returned *ppos == NULL this means that the last element has been
 * handled.
 *
 */
static int bnx2x_vlan_mac_restore(struct bnx2x *bp,
                           struct bnx2x_vlan_mac_ramrod_params *p,
                           struct bnx2x_vlan_mac_registry_elem **ppos)
{
        struct bnx2x_vlan_mac_registry_elem *pos;
        struct bnx2x_vlan_mac_obj *o = p->vlan_mac_obj;

        /* If list is empty - there is nothing to do here */
        if (list_empty(&o->head)) {
                *ppos = NULL;
                return 0;
        }

        /* make a step... */
        if (*ppos == NULL)
                *ppos = list_first_entry(&o->head,
                                         struct bnx2x_vlan_mac_registry_elem,
                                         link);
        else
                *ppos = list_next_entry(*ppos, link);

        pos = *ppos;

        /* If it's the last step - return NULL */
        if (list_is_last(&pos->link, &o->head))
                *ppos = NULL;

        /* Prepare a 'user_req' */
        memcpy(&p->user_req.u, &pos->u, sizeof(pos->u));

        /* Set the command */
        p->user_req.cmd = BNX2X_VLAN_MAC_ADD;

        /* Set vlan_mac_flags */
        p->user_req.vlan_mac_flags = pos->vlan_mac_flags;

        /* Set a restore bit */
        __set_bit(RAMROD_RESTORE, &p->ramrod_flags);

        return bnx2x_config_vlan_mac(bp, p);
}

/* bnx2x_exeq_get_mac/bnx2x_exeq_get_vlan/bnx2x_exeq_get_vlan_mac return a
 * pointer to an element with a specific criteria and NULL if such an element
 * hasn't been found.
 */
static struct bnx2x_exeq_elem *bnx2x_exeq_get_mac(
        struct bnx2x_exe_queue_obj *o,
        struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_exeq_elem *pos;
        struct bnx2x_mac_ramrod_data *data = &elem->cmd_data.vlan_mac.u.mac;

        /* Check pending for execution commands */
        list_for_each_entry(pos, &o->exe_queue, link)
                if (!memcmp(&pos->cmd_data.vlan_mac.u.mac, data,
                              sizeof(*data)) &&
                    (pos->cmd_data.vlan_mac.cmd == elem->cmd_data.vlan_mac.cmd))
                        return pos;

        return NULL;
}

static struct bnx2x_exeq_elem *bnx2x_exeq_get_vlan(
        struct bnx2x_exe_queue_obj *o,
        struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_exeq_elem *pos;
        struct bnx2x_vlan_ramrod_data *data = &elem->cmd_data.vlan_mac.u.vlan;

        /* Check pending for execution commands */
        list_for_each_entry(pos, &o->exe_queue, link)
                if (!memcmp(&pos->cmd_data.vlan_mac.u.vlan, data,
                              sizeof(*data)) &&
                    (pos->cmd_data.vlan_mac.cmd == elem->cmd_data.vlan_mac.cmd))
                        return pos;

        return NULL;
}

static struct bnx2x_exeq_elem *bnx2x_exeq_get_vlan_mac(
        struct bnx2x_exe_queue_obj *o,
        struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_exeq_elem *pos;
        struct bnx2x_vlan_mac_ramrod_data *data =
                &elem->cmd_data.vlan_mac.u.vlan_mac;

        /* Check pending for execution commands */
        list_for_each_entry(pos, &o->exe_queue, link)
                if (!memcmp(&pos->cmd_data.vlan_mac.u.vlan_mac, data,
                            sizeof(*data)) &&
                    (pos->cmd_data.vlan_mac.cmd ==
                     elem->cmd_data.vlan_mac.cmd))
                        return pos;

        return NULL;
}

/**
 * bnx2x_validate_vlan_mac_add - check if an ADD command can be executed
 *
 * @bp:         device handle
 * @qo:         bnx2x_qable_obj
 * @elem:       bnx2x_exeq_elem
 *
 * Checks that the requested configuration can be added. If yes and if
 * requested, consume CAM credit.
 *
 * The 'validate' is run after the 'optimize'.
 *
 */
static inline int bnx2x_validate_vlan_mac_add(struct bnx2x *bp,
                                              union bnx2x_qable_obj *qo,
                                              struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_vlan_mac_obj *o = &qo->vlan_mac;
        struct bnx2x_exe_queue_obj *exeq = &o->exe_queue;
        int rc;

        /* Check the registry */
        rc = o->check_add(bp, o, &elem->cmd_data.vlan_mac.u);
        if (rc) {
                DP(BNX2X_MSG_SP, "ADD command is not allowed considering current registry state.\n");
                return rc;
        }

        /* Check if there is a pending ADD command for this
         * MAC/VLAN/VLAN-MAC. Return an error if there is.
         */
        if (exeq->get(exeq, elem)) {
                DP(BNX2X_MSG_SP, "There is a pending ADD command already\n");
                return -EEXIST;
        }

        /* TODO: Check the pending MOVE from other objects where this
         * object is a destination object.
         */

        /* Consume the credit if not requested not to */
        if (!(test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
                       &elem->cmd_data.vlan_mac.vlan_mac_flags) ||
            o->get_credit(o)))
                return -EINVAL;

        return 0;
}

/**
 * bnx2x_validate_vlan_mac_del - check if the DEL command can be executed
 *
 * @bp:         device handle
 * @qo:         quable object to check
 * @elem:       element that needs to be deleted
 *
 * Checks that the requested configuration can be deleted. If yes and if
 * requested, returns a CAM credit.
 *
 * The 'validate' is run after the 'optimize'.
 */
static inline int bnx2x_validate_vlan_mac_del(struct bnx2x *bp,
                                              union bnx2x_qable_obj *qo,
                                              struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_vlan_mac_obj *o = &qo->vlan_mac;
        struct bnx2x_vlan_mac_registry_elem *pos;
        struct bnx2x_exe_queue_obj *exeq = &o->exe_queue;
        struct bnx2x_exeq_elem query_elem;

        /* If this classification can not be deleted (doesn't exist)
         * - return a BNX2X_EXIST.
         */
        pos = o->check_del(bp, o, &elem->cmd_data.vlan_mac.u);
        if (!pos) {
                DP(BNX2X_MSG_SP, "DEL command is not allowed considering current registry state\n");
                return -EEXIST;
        }

        /* Check if there are pending DEL or MOVE commands for this
         * MAC/VLAN/VLAN-MAC. Return an error if so.
         */
        memcpy(&query_elem, elem, sizeof(query_elem));

        /* Check for MOVE commands */
        query_elem.cmd_data.vlan_mac.cmd = BNX2X_VLAN_MAC_MOVE;
        if (exeq->get(exeq, &query_elem)) {
                BNX2X_ERR("There is a pending MOVE command already\n");
                return -EINVAL;
        }

        /* Check for DEL commands */
        if (exeq->get(exeq, elem)) {
                DP(BNX2X_MSG_SP, "There is a pending DEL command already\n");
                return -EEXIST;
        }

        /* Return the credit to the credit pool if not requested not to */
        if (!(test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
                       &elem->cmd_data.vlan_mac.vlan_mac_flags) ||
            o->put_credit(o))) {
                BNX2X_ERR("Failed to return a credit\n");
                return -EINVAL;
        }

        return 0;
}

/**
 * bnx2x_validate_vlan_mac_move - check if the MOVE command can be executed
 *
 * @bp:         device handle
 * @qo:         quable object to check (source)
 * @elem:       element that needs to be moved
 *
 * Checks that the requested configuration can be moved. If yes and if
 * requested, returns a CAM credit.
 *
 * The 'validate' is run after the 'optimize'.
 */
static inline int bnx2x_validate_vlan_mac_move(struct bnx2x *bp,
                                               union bnx2x_qable_obj *qo,
                                               struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_vlan_mac_obj *src_o = &qo->vlan_mac;
        struct bnx2x_vlan_mac_obj *dest_o = elem->cmd_data.vlan_mac.target_obj;
        struct bnx2x_exeq_elem query_elem;
        struct bnx2x_exe_queue_obj *src_exeq = &src_o->exe_queue;
        struct bnx2x_exe_queue_obj *dest_exeq = &dest_o->exe_queue;

        /* Check if we can perform this operation based on the current registry
         * state.
         */
        if (!src_o->check_move(bp, src_o, dest_o,
                               &elem->cmd_data.vlan_mac.u)) {
                DP(BNX2X_MSG_SP, "MOVE command is not allowed considering current registry state\n");
                return -EINVAL;
        }

        /* Check if there is an already pending DEL or MOVE command for the
         * source object or ADD command for a destination object. Return an
         * error if so.
         */
        memcpy(&query_elem, elem, sizeof(query_elem));

        /* Check DEL on source */
        query_elem.cmd_data.vlan_mac.cmd = BNX2X_VLAN_MAC_DEL;
        if (src_exeq->get(src_exeq, &query_elem)) {
                BNX2X_ERR("There is a pending DEL command on the source queue already\n");
                return -EINVAL;
        }

        /* Check MOVE on source */
        if (src_exeq->get(src_exeq, elem)) {
                DP(BNX2X_MSG_SP, "There is a pending MOVE command already\n");
                return -EEXIST;
        }

        /* Check ADD on destination */
        query_elem.cmd_data.vlan_mac.cmd = BNX2X_VLAN_MAC_ADD;
        if (dest_exeq->get(dest_exeq, &query_elem)) {
                BNX2X_ERR("There is a pending ADD command on the destination queue already\n");
                return -EINVAL;
        }

        /* Consume the credit if not requested not to */
        if (!(test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT_DEST,
                       &elem->cmd_data.vlan_mac.vlan_mac_flags) ||
            dest_o->get_credit(dest_o)))
                return -EINVAL;

        if (!(test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
                       &elem->cmd_data.vlan_mac.vlan_mac_flags) ||
            src_o->put_credit(src_o))) {
                /* return the credit taken from dest... */
                dest_o->put_credit(dest_o);
                return -EINVAL;
        }

        return 0;
}

static int bnx2x_validate_vlan_mac(struct bnx2x *bp,
                                   union bnx2x_qable_obj *qo,
                                   struct bnx2x_exeq_elem *elem)
{
        switch (elem->cmd_data.vlan_mac.cmd) {
        case BNX2X_VLAN_MAC_ADD:
                return bnx2x_validate_vlan_mac_add(bp, qo, elem);
        case BNX2X_VLAN_MAC_DEL:
                return bnx2x_validate_vlan_mac_del(bp, qo, elem);
        case BNX2X_VLAN_MAC_MOVE:
                return bnx2x_validate_vlan_mac_move(bp, qo, elem);
        default:
                return -EINVAL;
        }
}

static int bnx2x_remove_vlan_mac(struct bnx2x *bp,
                                  union bnx2x_qable_obj *qo,
                                  struct bnx2x_exeq_elem *elem)
{
        int rc = 0;

        /* If consumption wasn't required, nothing to do */
        if (test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
                     &elem->cmd_data.vlan_mac.vlan_mac_flags))
                return 0;

        switch (elem->cmd_data.vlan_mac.cmd) {
        case BNX2X_VLAN_MAC_ADD:
        case BNX2X_VLAN_MAC_MOVE:
                rc = qo->vlan_mac.put_credit(&qo->vlan_mac);
                break;
        case BNX2X_VLAN_MAC_DEL:
                rc = qo->vlan_mac.get_credit(&qo->vlan_mac);
                break;
        default:
                return -EINVAL;
        }

        if (rc != true)
                return -EINVAL;

        return 0;
}

/**
 * bnx2x_wait_vlan_mac - passively wait for 5 seconds until all work completes.
 *
 * @bp:         device handle
 * @o:          bnx2x_vlan_mac_obj
 *
 */
static int bnx2x_wait_vlan_mac(struct bnx2x *bp,
                               struct bnx2x_vlan_mac_obj *o)
{
        int cnt = 5000, rc;
        struct bnx2x_exe_queue_obj *exeq = &o->exe_queue;
        struct bnx2x_raw_obj *raw = &o->raw;

        while (cnt--) {
                /* Wait for the current command to complete */
                rc = raw->wait_comp(bp, raw);
                if (rc)
                        return rc;

                /* Wait until there are no pending commands */
                if (!bnx2x_exe_queue_empty(exeq))
                        usleep_range(1000, 2000);
                else
                        return 0;
        }

        return -EBUSY;
}

static int __bnx2x_vlan_mac_execute_step(struct bnx2x *bp,
                                         struct bnx2x_vlan_mac_obj *o,
                                         unsigned long *ramrod_flags)
{
        int rc = 0;

        spin_lock_bh(&o->exe_queue.lock);

        DP(BNX2X_MSG_SP, "vlan_mac_execute_step - trying to take writer lock\n");
        rc = __bnx2x_vlan_mac_h_write_trylock(bp, o);

        if (rc != 0) {
                __bnx2x_vlan_mac_h_pend(bp, o, *ramrod_flags);

                /* Calling function should not differentiate between this case
                 * and the case in which there is already a pending ramrod
                 */
                rc = 1;
        } else {
                rc = bnx2x_exe_queue_step(bp, &o->exe_queue, ramrod_flags);
        }
        spin_unlock_bh(&o->exe_queue.lock);

        return rc;
}

/**
 * bnx2x_complete_vlan_mac - complete one VLAN-MAC ramrod
 *
 * @bp:         device handle
 * @o:          bnx2x_vlan_mac_obj
 * @cqe:        completion element
 * @ramrod_flags: if set schedule next execution chunk
 *
 */
static int bnx2x_complete_vlan_mac(struct bnx2x *bp,
                                   struct bnx2x_vlan_mac_obj *o,
                                   union event_ring_elem *cqe,
                                   unsigned long *ramrod_flags)
{
        struct bnx2x_raw_obj *r = &o->raw;
        int rc;

        /* Clearing the pending list & raw state should be made
         * atomically (as execution flow assumes they represent the same).
         */
        spin_lock_bh(&o->exe_queue.lock);

        /* Reset pending list */
        __bnx2x_exe_queue_reset_pending(bp, &o->exe_queue);

        /* Clear pending */
        r->clear_pending(r);

        spin_unlock_bh(&o->exe_queue.lock);

        /* If ramrod failed this is most likely a SW bug */
        if (cqe->message.error)
                return -EINVAL;

        /* Run the next bulk of pending commands if requested */
        if (test_bit(RAMROD_CONT, ramrod_flags)) {
                rc = __bnx2x_vlan_mac_execute_step(bp, o, ramrod_flags);

                if (rc < 0)
                        return rc;
        }

        /* If there is more work to do return PENDING */
        if (!bnx2x_exe_queue_empty(&o->exe_queue))
                return 1;

        return 0;
}

/**
 * bnx2x_optimize_vlan_mac - optimize ADD and DEL commands.
 *
 * @bp:         device handle
 * @qo:         bnx2x_qable_obj
 * @elem:       bnx2x_exeq_elem
 */
static int bnx2x_optimize_vlan_mac(struct bnx2x *bp,
                                   union bnx2x_qable_obj *qo,
                                   struct bnx2x_exeq_elem *elem)
{
        struct bnx2x_exeq_elem query, *pos;
        struct bnx2x_vlan_mac_obj *o = &qo->vlan_mac;
        struct bnx2x_exe_queue_obj *exeq = &o->exe_queue;

        memcpy(&query, elem, sizeof(query));

        switch (elem->cmd_data.vlan_mac.cmd) {
        case BNX2X_VLAN_MAC_ADD:
                query.cmd_data.vlan_mac.cmd = BNX2X_VLAN_MAC_DEL;
                break;
        case BNX2X_VLAN_MAC_DEL:
                query.cmd_data.vlan_mac.cmd = BNX2X_VLAN_MAC_ADD;
                break;
        default:
                /* Don't handle anything other than ADD or DEL */
                return 0;
        }

        /* If we found the appropriate element - delete it */
        pos = exeq->get(exeq, &query);
        if (pos) {

                /* Return the credit of the optimized command */
                if (!test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
                              &pos->cmd_data.vlan_mac.vlan_mac_flags)) {
                        if ((query.cmd_data.vlan_mac.cmd ==
                             BNX2X_VLAN_MAC_ADD) && !o->put_credit(o)) {
                                BNX2X_ERR("Failed to return the credit for the optimized ADD command\n");
                                return -EINVAL;
                        } else if (!o->get_credit(o)) { /* VLAN_MAC_DEL */
                                BNX2X_ERR("Failed to recover the credit from the optimized DEL command\n");
                                return -EINVAL;
                        }
                }

                DP(BNX2X_MSG_SP, "Optimizing %s command\n",
                           (elem->cmd_data.vlan_mac.cmd == BNX2X_VLAN_MAC_ADD) ?
                           "ADD" : "DEL");

                list_del(&pos->link);
                bnx2x_exe_queue_free_elem(bp, pos);
                return 1;
        }

        return 0;
}

/**
 * bnx2x_vlan_mac_get_registry_elem - prepare a registry element
 *
 * @bp:   device handle
 * @o:  vlan object
 * @elem: element
 * @restore: to restore or not
 * @re: registry
 *
 * prepare a registry element according to the current command request.
 */
static inline int bnx2x_vlan_mac_get_registry_elem(
        struct bnx2x *bp,
        struct bnx2x_vlan_mac_obj *o,
        struct bnx2x_exeq_elem *elem,
        bool restore,
        struct bnx2x_vlan_mac_registry_elem **re)
{
        enum bnx2x_vlan_mac_cmd cmd = elem->cmd_data.vlan_mac.cmd;
        struct bnx2x_vlan_mac_registry_elem *reg_elem;

        /* Allocate a new registry element if needed. */
        if (!restore &&
            ((cmd == BNX2X_VLAN_MAC_ADD) || (cmd == BNX2X_VLAN_MAC_MOVE))) {
                reg_elem = kzalloc(sizeof(*reg_elem), GFP_ATOMIC);
                if (!reg_elem)
                        return -ENOMEM;

                /* Get a new CAM offset */
                if (!o->get_cam_offset(o, &reg_elem->cam_offset)) {
                        /* This shall never happen, because we have checked the
                         * CAM availability in the 'validate'.
                         */
                        WARN_ON(1);
                        kfree(reg_elem);
                        return -EINVAL;
                }

                DP(BNX2X_MSG_SP, "Got cam offset %d\n", reg_elem->cam_offset);

                /* Set a VLAN-MAC data */
                memcpy(&reg_elem->u, &elem->cmd_data.vlan_mac.u,
                          sizeof(reg_elem->u));

                /* Copy the flags (needed for DEL and RESTORE flows) */
                reg_elem->vlan_mac_flags =
                        elem->cmd_data.vlan_mac.vlan_mac_flags;
        } else /* DEL, RESTORE */
                reg_elem = o->check_del(bp, o, &elem->cmd_data.vlan_mac.u);

        *re = reg_elem;
        return 0;
}

/**
 * bnx2x_execute_vlan_mac - execute vlan mac command
 *
 * @bp:                 device handle
 * @qo:                 bnx2x_qable_obj pointer
 * @exe_chunk:          chunk
 * @ramrod_flags:       flags
 *
 * go and send a ramrod!
 */
static int bnx2x_execute_vlan_mac(struct bnx2x *bp,
                                  union bnx2x_qable_obj *qo,
                                  struct list_head *exe_chunk,
                                  unsigned long *ramrod_flags)
{
        struct bnx2x_exeq_elem *elem;
        struct bnx2x_vlan_mac_obj *o = &qo->vlan_mac, *cam_obj;
        struct bnx2x_raw_obj *r = &o->raw;
        int rc, idx = 0;
        bool restore = test_bit(RAMROD_RESTORE, ramrod_flags);
        bool drv_only = test_bit(RAMROD_DRV_CLR_ONLY, ramrod_flags);
        struct bnx2x_vlan_mac_registry_elem *reg_elem;
        enum bnx2x_vlan_mac_cmd cmd;

        /* If DRIVER_ONLY execution is requested, cleanup a registry
         * and exit. Otherwise send a ramrod to FW.
         */
        if (!drv_only) {
                WARN_ON(r->check_pending(r));

                /* Set pending */
                r->set_pending(r);

                /* Fill the ramrod data */
                list_for_each_entry(elem, exe_chunk, link) {
                        cmd = elem->cmd_data.vlan_mac.cmd;
                        /* We will add to the target object in MOVE command, so
                         * change the object for a CAM search.
                         */
                        if (cmd == BNX2X_VLAN_MAC_MOVE)
                                cam_obj = elem->cmd_data.vlan_mac.target_obj;
                        else
                                cam_obj = o;

                        rc = bnx2x_vlan_mac_get_registry_elem(bp, cam_obj,
                                                              elem, restore,
                                                              &reg_elem);
                        if (rc)
                                goto error_exit;

                        WARN_ON(!reg_elem);

                        /* Push a new entry into the registry */
                        if (!restore &&
                            ((cmd == BNX2X_VLAN_MAC_ADD) ||
                            (cmd == BNX2X_VLAN_MAC_MOVE)))
                                list_add(&reg_elem->link, &cam_obj->head);

                        /* Configure a single command in a ramrod data buffer */
                        o->set_one_rule(bp, o, elem, idx,
                                        reg_elem->cam_offset);

                        /* MOVE command consumes 2 entries in the ramrod data */
                        if (cmd == BNX2X_VLAN_MAC_MOVE)
                                idx += 2;
                        else
                                idx++;
                }

                /* No need for an explicit memory barrier here as long we would
                 * need to ensure the ordering of writing to the SPQ element
                 * and updating of the SPQ producer which involves a memory
                 * read and we will have to put a full memory barrier there
                 * (inside bnx2x_sp_post()).
                 */

                rc = bnx2x_sp_post(bp, o->ramrod_cmd, r->cid,
                                   U64_HI(r->rdata_mapping),
                                   U64_LO(r->rdata_mapping),
                                   ETH_CONNECTION_TYPE);
                if (rc)
                        goto error_exit;
        }

        /* Now, when we are done with the ramrod - clean up the registry */
        list_for_each_entry(elem, exe_chunk, link) {
                cmd = elem->cmd_data.vlan_mac.cmd;
                if ((cmd == BNX2X_VLAN_MAC_DEL) ||
                    (cmd == BNX2X_VLAN_MAC_MOVE)) {
                        reg_elem = o->check_del(bp, o,
                                                &elem->cmd_data.vlan_mac.u);

                        WARN_ON(!reg_elem);

                        o->put_cam_offset(o, reg_elem->cam_offset);
                        list_del(&reg_elem->link);
                        kfree(reg_elem);
                }
        }

        if (!drv_only)
                return 1;
        else
                return 0;

error_exit:
        r->clear_pending(r);

        /* Cleanup a registry in case of a failure */
        list_for_each_entry(elem, exe_chunk, link) {
                cmd = elem->cmd_data.vlan_mac.cmd;

                if (cmd == BNX2X_VLAN_MAC_MOVE)
                        cam_obj = elem->cmd_data.vlan_mac.target_obj;
                else
                        cam_obj = o;

                /* Delete all newly added above entries */
                if (!restore &&
                    ((cmd == BNX2X_VLAN_MAC_ADD) ||
                    (cmd == BNX2X_VLAN_MAC_MOVE))) {
                        reg_elem = o->check_del(bp, cam_obj,
                                                &elem->cmd_data.vlan_mac.u);
                        if (reg_elem) {
                                list_del(&reg_elem->link);
                                kfree(reg_elem);
                        }
                }
        }

        return rc;
}

static inline int bnx2x_vlan_mac_push_new_cmd(
        struct bnx2x *bp,
        struct bnx2x_vlan_mac_ramrod_params *p)
{
        struct bnx2x_exeq_elem *elem;
        struct bnx2x_vlan_mac_obj *o = p->vlan_mac_obj;
        bool restore = test_bit(RAMROD_RESTORE, &p->ramrod_flags);

        /* Allocate the execution queue element */
        elem = bnx2x_exe_queue_alloc_elem(bp);
        if (!elem)
                return -ENOMEM;

        /* Set the command 'length' */
        switch (p->user_req.cmd) {
        case BNX2X_VLAN_MAC_MOVE:
                elem->cmd_len = 2;
                break;
        default:
                elem->cmd_len = 1;
        }

        /* Fill the object specific info */
        memcpy(&elem->cmd_data.vlan_mac, &p->user_req, sizeof(p->user_req));

        /* Try to add a new command to the pending list */
        return bnx2x_exe_queue_add(bp, &o->exe_queue, elem, restore);
}

/**
 * bnx2x_config_vlan_mac - configure VLAN/MAC/VLAN_MAC filtering rules.
 *
 * @bp:   device handle
 * @p:
 *
 */
int bnx2x_config_vlan_mac(struct bnx2x *bp,
                           struct bnx2x_vlan_mac_ramrod_params *p)
{
        int rc = 0;
        struct bnx2x_vlan_mac_obj *o = p->vlan_mac_obj;
        unsigned long *ramrod_flags = &p->ramrod_flags;
        bool cont = test_bit(RAMROD_CONT, ramrod_flags);
        struct bnx2x_raw_obj *raw = &o->raw;

        /*
         * Add new elements to the execution list for commands that require it.
         */
        if (!cont) {
                rc = bnx2x_vlan_mac_push_new_cmd(bp, p);
                if (rc)
                        return rc;
        }

        /* If nothing will be executed further in this iteration we want to
         * return PENDING if there are pending commands
         */
        if (!bnx2x_exe_queue_empty(&o->exe_queue))
                rc = 1;

        if (test_bit(RAMROD_DRV_CLR_ONLY, ramrod_flags))  {
                DP(BNX2X_MSG_SP, "RAMROD_DRV_CLR_ONLY requested: clearing a pending bit.\n");
                raw->clear_pending(raw);
        }

        /* Execute commands if required */
        if (cont || test_bit(RAMROD_EXEC, ramrod_flags) ||
            test_bit(RAMROD_COMP_WAIT, ramrod_flags)) {
                rc = __bnx2x_vlan_mac_execute_step(bp, p->vlan_mac_obj,
                                                   &p->ramrod_flags);
                if (rc < 0)
                        return rc;
        }

        /* RAMROD_COMP_WAIT is a superset of RAMROD_EXEC. If it was set
         * then user want to wait until the last command is done.
         */
        if (test_bit(RAMROD_COMP_WAIT, &p->ramrod_flags)) {
                /* Wait maximum for the current exe_queue length iterations plus
                 * one (for the current pending command).
                 */
                int max_iterations = bnx2x_exe_queue_length(&o->exe_queue) + 1;

                while (!bnx2x_exe_queue_empty(&o->exe_queue) &&
                       max_iterations--) {

                        /* Wait for the current command to complete */
                        rc = raw->wait_comp(bp, raw);
                        if (rc)
                                return rc;

                        /* Make a next step */
                        rc = __bnx2x_vlan_mac_execute_step(bp,
                                                           p->vlan_mac_obj,
                                                           &p->ramrod_flags);
                        if (rc < 0)
                                return rc;
                }