// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, Intel Corporation. */

/* Intel(R) Ethernet Connection E800 Series Linux Driver */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "ice.h"
#include "ice_lib.h"

#define DRV_VERSION     "0.7.2-k"
#define DRV_SUMMARY     "Intel(R) Ethernet Connection E800 Series Linux Driver"
const char ice_drv_ver[] = DRV_VERSION;
static const char ice_driver_string[] = DRV_SUMMARY;
static const char ice_copyright[] = "Copyright (c) 2018, Intel Corporation.";

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION(DRV_SUMMARY);
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);

static int debug = -1;
module_param(debug, int, 0644);
#ifndef CONFIG_DYNAMIC_DEBUG
MODULE_PARM_DESC(debug, "netif level (0=none,...,16=all), hw debug_mask (0x8XXXXXXX)");
#else
MODULE_PARM_DESC(debug, "netif level (0=none,...,16=all)");
#endif /* !CONFIG_DYNAMIC_DEBUG */

static struct workqueue_struct *ice_wq;
static const struct net_device_ops ice_netdev_ops;

static void ice_pf_dis_all_vsi(struct ice_pf *pf);
static void ice_rebuild(struct ice_pf *pf);

static void ice_vsi_release_all(struct ice_pf *pf);
static void ice_update_vsi_stats(struct ice_vsi *vsi);
static void ice_update_pf_stats(struct ice_pf *pf);

/**
 * ice_get_tx_pending - returns number of Tx descriptors not processed
 * @ring: the ring of descriptors
 */
static u32 ice_get_tx_pending(struct ice_ring *ring)
{
        u32 head, tail;

        head = ring->next_to_clean;
        tail = readl(ring->tail);

        if (head != tail)
                return (head < tail) ?
                        tail - head : (tail + ring->count - head);
        return 0;
}

/**
 * ice_check_for_hang_subtask - check for and recover hung queues
 * @pf: pointer to PF struct
 */
static void ice_check_for_hang_subtask(struct ice_pf *pf)
{
        struct ice_vsi *vsi = NULL;
        unsigned int i;
        u32 v, v_idx;
        int packets;

        ice_for_each_vsi(pf, v)
                if (pf->vsi[v] && pf->vsi[v]->type == ICE_VSI_PF) {
                        vsi = pf->vsi[v];
                        break;
                }

        if (!vsi || test_bit(__ICE_DOWN, vsi->state))
                return;

        if (!(vsi->netdev && netif_carrier_ok(vsi->netdev)))
                return;

        for (i = 0; i < vsi->num_txq; i++) {
                struct ice_ring *tx_ring = vsi->tx_rings[i];

                if (tx_ring && tx_ring->desc) {
                        int itr = ICE_ITR_NONE;

                        /* If packet counter has not changed the queue is
                         * likely stalled, so force an interrupt for this
                         * queue.
                         *
                         * prev_pkt would be negative if there was no
                         * pending work.
                         */
                        packets = tx_ring->stats.pkts & INT_MAX;
                        if (tx_ring->tx_stats.prev_pkt == packets) {
                                /* Trigger sw interrupt to revive the queue */
                                v_idx = tx_ring->q_vector->v_idx;
                                wr32(&vsi->back->hw,
                                     GLINT_DYN_CTL(vsi->hw_base_vector + v_idx),
                                     (itr << GLINT_DYN_CTL_ITR_INDX_S) |
                                     GLINT_DYN_CTL_SWINT_TRIG_M |
                                     GLINT_DYN_CTL_INTENA_MSK_M);
                                continue;
                        }

                        /* Memory barrier between read of packet count and call
                         * to ice_get_tx_pending()
                         */
                        smp_rmb();
                        tx_ring->tx_stats.prev_pkt =
                            ice_get_tx_pending(tx_ring) ? packets : -1;
                }
        }
}

/**
 * ice_add_mac_to_sync_list - creates list of mac addresses to be synced
 * @netdev: the net device on which the sync is happening
 * @addr: mac address to sync
 *
 * This is a callback function which is called by the in kernel device sync
 * functions (like __dev_uc_sync, __dev_mc_sync, etc). This function only
 * populates the tmp_sync_list, which is later used by ice_add_mac to add the
 * mac filters from the hardware.
 */
static int ice_add_mac_to_sync_list(struct net_device *netdev, const u8 *addr)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;

        if (ice_add_mac_to_list(vsi, &vsi->tmp_sync_list, addr))
                return -EINVAL;

        return 0;
}

/**
 * ice_add_mac_to_unsync_list - creates list of mac addresses to be unsynced
 * @netdev: the net device on which the unsync is happening
 * @addr: mac address to unsync
 *
 * This is a callback function which is called by the in kernel device unsync
 * functions (like __dev_uc_unsync, __dev_mc_unsync, etc). This function only
 * populates the tmp_unsync_list, which is later used by ice_remove_mac to
 * delete the mac filters from the hardware.
 */
static int ice_add_mac_to_unsync_list(struct net_device *netdev, const u8 *addr)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;

        if (ice_add_mac_to_list(vsi, &vsi->tmp_unsync_list, addr))
                return -EINVAL;

        return 0;
}

/**
 * ice_vsi_fltr_changed - check if filter state changed
 * @vsi: VSI to be checked
 *
 * returns true if filter state has changed, false otherwise.
 */
static bool ice_vsi_fltr_changed(struct ice_vsi *vsi)
{
        return test_bit(ICE_VSI_FLAG_UMAC_FLTR_CHANGED, vsi->flags) ||
               test_bit(ICE_VSI_FLAG_MMAC_FLTR_CHANGED, vsi->flags) ||
               test_bit(ICE_VSI_FLAG_VLAN_FLTR_CHANGED, vsi->flags);
}

/**
 * ice_vsi_sync_fltr - Update the VSI filter list to the HW
 * @vsi: ptr to the VSI
 *
 * Push any outstanding VSI filter changes through the AdminQ.
 */
static int ice_vsi_sync_fltr(struct ice_vsi *vsi)
{
        struct device *dev = &vsi->back->pdev->dev;
        struct net_device *netdev = vsi->netdev;
        bool promisc_forced_on = false;
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        enum ice_status status = 0;
        u32 changed_flags = 0;
        int err = 0;

        if (!vsi->netdev)
                return -EINVAL;

        while (test_and_set_bit(__ICE_CFG_BUSY, vsi->state))
                usleep_range(1000, 2000);

        changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
        vsi->current_netdev_flags = vsi->netdev->flags;

        INIT_LIST_HEAD(&vsi->tmp_sync_list);
        INIT_LIST_HEAD(&vsi->tmp_unsync_list);

        if (ice_vsi_fltr_changed(vsi)) {
                clear_bit(ICE_VSI_FLAG_UMAC_FLTR_CHANGED, vsi->flags);
                clear_bit(ICE_VSI_FLAG_MMAC_FLTR_CHANGED, vsi->flags);
                clear_bit(ICE_VSI_FLAG_VLAN_FLTR_CHANGED, vsi->flags);

                /* grab the netdev's addr_list_lock */
                netif_addr_lock_bh(netdev);
                __dev_uc_sync(netdev, ice_add_mac_to_sync_list,
                              ice_add_mac_to_unsync_list);
                __dev_mc_sync(netdev, ice_add_mac_to_sync_list,
                              ice_add_mac_to_unsync_list);
                /* our temp lists are populated. release lock */
                netif_addr_unlock_bh(netdev);
        }

        /* Remove mac addresses in the unsync list */
        status = ice_remove_mac(hw, &vsi->tmp_unsync_list);
        ice_free_fltr_list(dev, &vsi->tmp_unsync_list);
        if (status) {
                netdev_err(netdev, "Failed to delete MAC filters\n");
                /* if we failed because of alloc failures, just bail */
                if (status == ICE_ERR_NO_MEMORY) {
                        err = -ENOMEM;
                        goto out;
                }
        }

        /* Add mac addresses in the sync list */
        status = ice_add_mac(hw, &vsi->tmp_sync_list);
        ice_free_fltr_list(dev, &vsi->tmp_sync_list);
        if (status) {
                netdev_err(netdev, "Failed to add MAC filters\n");
                /* If there is no more space for new umac filters, vsi
                 * should go into promiscuous mode. There should be some
                 * space reserved for promiscuous filters.
                 */
                if (hw->adminq.sq_last_status == ICE_AQ_RC_ENOSPC &&
                    !test_and_set_bit(__ICE_FLTR_OVERFLOW_PROMISC,
                                      vsi->state)) {
                        promisc_forced_on = true;
                        netdev_warn(netdev,
                                    "Reached MAC filter limit, forcing promisc mode on VSI %d\n",
                                    vsi->vsi_num);
                } else {
                        err = -EIO;
                        goto out;
                }
        }
        /* check for changes in promiscuous modes */
        if (changed_flags & IFF_ALLMULTI)
                netdev_warn(netdev, "Unsupported configuration\n");

        if (((changed_flags & IFF_PROMISC) || promisc_forced_on) ||
            test_bit(ICE_VSI_FLAG_PROMISC_CHANGED, vsi->flags)) {
                clear_bit(ICE_VSI_FLAG_PROMISC_CHANGED, vsi->flags);
                if (vsi->current_netdev_flags & IFF_PROMISC) {
                        /* Apply TX filter rule to get traffic from VMs */
                        status = ice_cfg_dflt_vsi(hw, vsi->idx, true,
                                                  ICE_FLTR_TX);
                        if (status) {
                                netdev_err(netdev, "Error setting default VSI %i tx rule\n",
                                           vsi->vsi_num);
                                vsi->current_netdev_flags &= ~IFF_PROMISC;
                                err = -EIO;
                                goto out_promisc;
                        }
                        /* Apply RX filter rule to get traffic from wire */
                        status = ice_cfg_dflt_vsi(hw, vsi->idx, true,
                                                  ICE_FLTR_RX);
                        if (status) {
                                netdev_err(netdev, "Error setting default VSI %i rx rule\n",
                                           vsi->vsi_num);
                                vsi->current_netdev_flags &= ~IFF_PROMISC;
                                err = -EIO;
                                goto out_promisc;
                        }
                } else {
                        /* Clear TX filter rule to stop traffic from VMs */
                        status = ice_cfg_dflt_vsi(hw, vsi->idx, false,
                                                  ICE_FLTR_TX);
                        if (status) {
                                netdev_err(netdev, "Error clearing default VSI %i tx rule\n",
                                           vsi->vsi_num);
                                vsi->current_netdev_flags |= IFF_PROMISC;
                                err = -EIO;
                                goto out_promisc;
                        }
                        /* Clear RX filter to remove traffic from wire */
                        status = ice_cfg_dflt_vsi(hw, vsi->idx, false,
                                                  ICE_FLTR_RX);
                        if (status) {
                                netdev_err(netdev, "Error clearing default VSI %i rx rule\n",
                                           vsi->vsi_num);
                                vsi->current_netdev_flags |= IFF_PROMISC;
                                err = -EIO;
                                goto out_promisc;
                        }
                }
        }
        goto exit;

out_promisc:
        set_bit(ICE_VSI_FLAG_PROMISC_CHANGED, vsi->flags);
        goto exit;
out:
        /* if something went wrong then set the changed flag so we try again */
        set_bit(ICE_VSI_FLAG_UMAC_FLTR_CHANGED, vsi->flags);
        set_bit(ICE_VSI_FLAG_MMAC_FLTR_CHANGED, vsi->flags);
exit:
        clear_bit(__ICE_CFG_BUSY, vsi->state);
        return err;
}

/**
 * ice_sync_fltr_subtask - Sync the VSI filter list with HW
 * @pf: board private structure
 */
static void ice_sync_fltr_subtask(struct ice_pf *pf)
{
        int v;

        if (!pf || !(test_bit(ICE_FLAG_FLTR_SYNC, pf->flags)))
                return;

        clear_bit(ICE_FLAG_FLTR_SYNC, pf->flags);

        for (v = 0; v < pf->num_alloc_vsi; v++)
                if (pf->vsi[v] && ice_vsi_fltr_changed(pf->vsi[v]) &&
                    ice_vsi_sync_fltr(pf->vsi[v])) {
                        /* come back and try again later */
                        set_bit(ICE_FLAG_FLTR_SYNC, pf->flags);
                        break;
                }
}

/**
 * ice_prepare_for_reset - prep for the core to reset
 * @pf: board private structure
 *
 * Inform or close all dependent features in prep for reset.
 */
static void
ice_prepare_for_reset(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;

        /* Notify VFs of impending reset */
        if (ice_check_sq_alive(hw, &hw->mailboxq))
                ice_vc_notify_reset(pf);

        /* disable the VSIs and their queues that are not already DOWN */
        ice_pf_dis_all_vsi(pf);

        if (hw->port_info)
                ice_sched_clear_port(hw->port_info);

        ice_shutdown_all_ctrlq(hw);

        set_bit(__ICE_PREPARED_FOR_RESET, pf->state);
}

/**
 * ice_do_reset - Initiate one of many types of resets
 * @pf: board private structure
 * @reset_type: reset type requested
 * before this function was called.
 */
static void ice_do_reset(struct ice_pf *pf, enum ice_reset_req reset_type)
{
        struct device *dev = &pf->pdev->dev;
        struct ice_hw *hw = &pf->hw;

        dev_dbg(dev, "reset_type 0x%x requested\n", reset_type);
        WARN_ON(in_interrupt());

        ice_prepare_for_reset(pf);

        /* trigger the reset */
        if (ice_reset(hw, reset_type)) {
                dev_err(dev, "reset %d failed\n", reset_type);
                set_bit(__ICE_RESET_FAILED, pf->state);
                clear_bit(__ICE_RESET_OICR_RECV, pf->state);
                clear_bit(__ICE_PREPARED_FOR_RESET, pf->state);
                clear_bit(__ICE_PFR_REQ, pf->state);
                clear_bit(__ICE_CORER_REQ, pf->state);
                clear_bit(__ICE_GLOBR_REQ, pf->state);
                return;
        }

        /* PFR is a bit of a special case because it doesn't result in an OICR
         * interrupt. So for PFR, rebuild after the reset and clear the reset-
         * associated state bits.
         */
        if (reset_type == ICE_RESET_PFR) {
                pf->pfr_count++;
                ice_rebuild(pf);
                clear_bit(__ICE_PREPARED_FOR_RESET, pf->state);
                clear_bit(__ICE_PFR_REQ, pf->state);
        }
}

/**
 * ice_reset_subtask - Set up for resetting the device and driver
 * @pf: board private structure
 */
static void ice_reset_subtask(struct ice_pf *pf)
{
        enum ice_reset_req reset_type = ICE_RESET_INVAL;

        /* When a CORER/GLOBR/EMPR is about to happen, the hardware triggers an
         * OICR interrupt. The OICR handler (ice_misc_intr) determines what type
         * of reset is pending and sets bits in pf->state indicating the reset
         * type and __ICE_RESET_OICR_RECV. So, if the latter bit is set
         * prepare for pending reset if not already (for PF software-initiated
         * global resets the software should already be prepared for it as
         * indicated by __ICE_PREPARED_FOR_RESET; for global resets initiated
         * by firmware or software on other PFs, that bit is not set so prepare
         * for the reset now), poll for reset done, rebuild and return.
         */
        if (test_bit(__ICE_RESET_OICR_RECV, pf->state)) {
                clear_bit(__ICE_GLOBR_RECV, pf->state);
                clear_bit(__ICE_CORER_RECV, pf->state);
                if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state))
                        ice_prepare_for_reset(pf);

                /* make sure we are ready to rebuild */
                if (ice_check_reset(&pf->hw)) {
                        set_bit(__ICE_RESET_FAILED, pf->state);
                } else {
                        /* done with reset. start rebuild */
                        pf->hw.reset_ongoing = false;
                        ice_rebuild(pf);
                        /* clear bit to resume normal operations, but
                         * ICE_NEEDS_RESTART bit is set incase rebuild failed
                         */
                        clear_bit(__ICE_RESET_OICR_RECV, pf->state);
                        clear_bit(__ICE_PREPARED_FOR_RESET, pf->state);
                        clear_bit(__ICE_PFR_REQ, pf->state);
                        clear_bit(__ICE_CORER_REQ, pf->state);
                        clear_bit(__ICE_GLOBR_REQ, pf->state);
                }

                return;
        }

        /* No pending resets to finish processing. Check for new resets */
        if (test_bit(__ICE_PFR_REQ, pf->state))
                reset_type = ICE_RESET_PFR;
        if (test_bit(__ICE_CORER_REQ, pf->state))
                reset_type = ICE_RESET_CORER;
        if (test_bit(__ICE_GLOBR_REQ, pf->state))
                reset_type = ICE_RESET_GLOBR;
        /* If no valid reset type requested just return */
        if (reset_type == ICE_RESET_INVAL)
                return;

        /* reset if not already down or busy */
        if (!test_bit(__ICE_DOWN, pf->state) &&
            !test_bit(__ICE_CFG_BUSY, pf->state)) {
                ice_do_reset(pf, reset_type);
        }
}

/**
 * ice_print_link_msg - print link up or down message
 * @vsi: the VSI whose link status is being queried
 * @isup: boolean for if the link is now up or down
 */
void ice_print_link_msg(struct ice_vsi *vsi, bool isup)
{
        const char *speed;
        const char *fc;

        if (vsi->current_isup == isup)
                return;

        vsi->current_isup = isup;

        if (!isup) {
                netdev_info(vsi->netdev, "NIC Link is Down\n");
                return;
        }

        switch (vsi->port_info->phy.link_info.link_speed) {
        case ICE_AQ_LINK_SPEED_40GB:
                speed = "40 G";
                break;
        case ICE_AQ_LINK_SPEED_25GB:
                speed = "25 G";
                break;
        case ICE_AQ_LINK_SPEED_20GB:
                speed = "20 G";
                break;
        case ICE_AQ_LINK_SPEED_10GB:
                speed = "10 G";
                break;
        case ICE_AQ_LINK_SPEED_5GB:
                speed = "5 G";
                break;
        case ICE_AQ_LINK_SPEED_2500MB:
                speed = "2.5 G";
                break;
        case ICE_AQ_LINK_SPEED_1000MB:
                speed = "1 G";
                break;
        case ICE_AQ_LINK_SPEED_100MB:
                speed = "100 M";
                break;
        default:
                speed = "Unknown";
                break;
        }

        switch (vsi->port_info->fc.current_mode) {
        case ICE_FC_FULL:
                fc = "RX/TX";
                break;
        case ICE_FC_TX_PAUSE:
                fc = "TX";
                break;
        case ICE_FC_RX_PAUSE:
                fc = "RX";
                break;
        default:
                fc = "Unknown";
                break;
        }

        netdev_info(vsi->netdev, "NIC Link is up %sbps, Flow Control: %s\n",
                    speed, fc);
}

/**
 * ice_vsi_link_event - update the vsi's netdev
 * @vsi: the vsi on which the link event occurred
 * @link_up: whether or not the vsi needs to be set up or down
 */
static void ice_vsi_link_event(struct ice_vsi *vsi, bool link_up)
{
        if (!vsi || test_bit(__ICE_DOWN, vsi->state))
                return;

        if (vsi->type == ICE_VSI_PF) {
                if (!vsi->netdev) {
                        dev_dbg(&vsi->back->pdev->dev,
                                "vsi->netdev is not initialized!\n");
                        return;
                }
                if (link_up) {
                        netif_carrier_on(vsi->netdev);
                        netif_tx_wake_all_queues(vsi->netdev);
                } else {
                        netif_carrier_off(vsi->netdev);
                        netif_tx_stop_all_queues(vsi->netdev);
                }
        }
}

/**
 * ice_link_event - process the link event
 * @pf: pf that the link event is associated with
 * @pi: port_info for the port that the link event is associated with
 *
 * Returns -EIO if ice_get_link_status() fails
 * Returns 0 on success
 */
static int
ice_link_event(struct ice_pf *pf, struct ice_port_info *pi)
{
        u8 new_link_speed, old_link_speed;
        struct ice_phy_info *phy_info;
        bool new_link_same_as_old;
        bool new_link, old_link;
        u8 lport;
        u16 v;

        phy_info = &pi->phy;
        phy_info->link_info_old = phy_info->link_info;
        /* Force ice_get_link_status() to update link info */
        phy_info->get_link_info = true;

        old_link = (phy_info->link_info_old.link_info & ICE_AQ_LINK_UP);
        old_link_speed = phy_info->link_info_old.link_speed;

        lport = pi->lport;
        if (ice_get_link_status(pi, &new_link)) {
                dev_dbg(&pf->pdev->dev,
                        "Could not get link status for port %d\n", lport);
                return -EIO;
        }

        new_link_speed = phy_info->link_info.link_speed;

        new_link_same_as_old = (new_link == old_link &&
                                new_link_speed == old_link_speed);

        ice_for_each_vsi(pf, v) {
                struct ice_vsi *vsi = pf->vsi[v];

                if (!vsi || !vsi->port_info)
                        continue;

                if (new_link_same_as_old &&
                    (test_bit(__ICE_DOWN, vsi->state) ||
                    new_link == netif_carrier_ok(vsi->netdev)))
                        continue;

                if (vsi->port_info->lport == lport) {
                        ice_print_link_msg(vsi, new_link);
                        ice_vsi_link_event(vsi, new_link);
                }
        }

        if (!new_link_same_as_old && pf->num_alloc_vfs)
                ice_vc_notify_link_state(pf);

        return 0;
}

/**
 * ice_watchdog_subtask - periodic tasks not using event driven scheduling
 * @pf: board private structure
 */
static void ice_watchdog_subtask(struct ice_pf *pf)
{
        int i;

        /* if interface is down do nothing */
        if (test_bit(__ICE_DOWN, pf->state) ||
            test_bit(__ICE_CFG_BUSY, pf->state))
                return;

        /* make sure we don't do these things too often */
        if (time_before(jiffies,
                        pf->serv_tmr_prev + pf->serv_tmr_period))
                return;

        pf->serv_tmr_prev = jiffies;

        if (ice_link_event(pf, pf->hw.port_info))
                dev_dbg(&pf->pdev->dev, "ice_link_event failed\n");

        /* Update the stats for active netdevs so the network stack
         * can look at updated numbers whenever it cares to
         */
        ice_update_pf_stats(pf);
        for (i = 0; i < pf->num_alloc_vsi; i++)
                if (pf->vsi[i] && pf->vsi[i]->netdev)
                        ice_update_vsi_stats(pf->vsi[i]);
}

/**
 * __ice_clean_ctrlq - helper function to clean controlq rings
 * @pf: ptr to struct ice_pf
 * @q_type: specific Control queue type
 */
static int __ice_clean_ctrlq(struct ice_pf *pf, enum ice_ctl_q q_type)
{
        struct ice_rq_event_info event;
        struct ice_hw *hw = &pf->hw;
        struct ice_ctl_q_info *cq;
        u16 pending, i = 0;
        const char *qtype;
        u32 oldval, val;

        /* Do not clean control queue if/when PF reset fails */
        if (test_bit(__ICE_RESET_FAILED, pf->state))
                return 0;

        switch (q_type) {
        case ICE_CTL_Q_ADMIN:
                cq = &hw->adminq;
                qtype = "Admin";
                break;
        case ICE_CTL_Q_MAILBOX:
                cq = &hw->mailboxq;
                qtype = "Mailbox";
                break;
        default:
                dev_warn(&pf->pdev->dev, "Unknown control queue type 0x%x\n",
                         q_type);
                return 0;
        }

        /* check for error indications - PF_xx_AxQLEN register layout for
         * FW/MBX/SB are identical so just use defines for PF_FW_AxQLEN.
         */
        val = rd32(hw, cq->rq.len);
        if (val & (PF_FW_ARQLEN_ARQVFE_M | PF_FW_ARQLEN_ARQOVFL_M |
                   PF_FW_ARQLEN_ARQCRIT_M)) {
                oldval = val;
                if (val & PF_FW_ARQLEN_ARQVFE_M)
                        dev_dbg(&pf->pdev->dev,
                                "%s Receive Queue VF Error detected\n", qtype);
                if (val & PF_FW_ARQLEN_ARQOVFL_M) {
                        dev_dbg(&pf->pdev->dev,
                                "%s Receive Queue Overflow Error detected\n",
                                qtype);
                }
                if (val & PF_FW_ARQLEN_ARQCRIT_M)
                        dev_dbg(&pf->pdev->dev,
                                "%s Receive Queue Critical Error detected\n",
                                qtype);
                val &= ~(PF_FW_ARQLEN_ARQVFE_M | PF_FW_ARQLEN_ARQOVFL_M |
                         PF_FW_ARQLEN_ARQCRIT_M);
                if (oldval != val)
                        wr32(hw, cq->rq.len, val);
        }

        val = rd32(hw, cq->sq.len);
        if (val & (PF_FW_ATQLEN_ATQVFE_M | PF_FW_ATQLEN_ATQOVFL_M |
                   PF_FW_ATQLEN_ATQCRIT_M)) {
                oldval = val;
                if (val & PF_FW_ATQLEN_ATQVFE_M)
                        dev_dbg(&pf->pdev->dev,
                                "%s Send Queue VF Error detected\n", qtype);
                if (val & PF_FW_ATQLEN_ATQOVFL_M) {
                        dev_dbg(&pf->pdev->dev,
                                "%s Send Queue Overflow Error detected\n",
                                qtype);
                }
                if (val & PF_FW_ATQLEN_ATQCRIT_M)
                        dev_dbg(&pf->pdev->dev,
                                "%s Send Queue Critical Error detected\n",
                                qtype);
                val &= ~(PF_FW_ATQLEN_ATQVFE_M | PF_FW_ATQLEN_ATQOVFL_M |
                         PF_FW_ATQLEN_ATQCRIT_M);
                if (oldval != val)
                        wr32(hw, cq->sq.len, val);
        }

        event.buf_len = cq->rq_buf_size;
        event.msg_buf = devm_kzalloc(&pf->pdev->dev, event.buf_len,
                                     GFP_KERNEL);
        if (!event.msg_buf)
                return 0;

        do {
                enum ice_status ret;
                u16 opcode;

                ret = ice_clean_rq_elem(hw, cq, &event, &pending);
                if (ret == ICE_ERR_AQ_NO_WORK)
                        break;
                if (ret) {
                        dev_err(&pf->pdev->dev,
                                "%s Receive Queue event error %d\n", qtype,
                                ret);
                        break;
                }

                opcode = le16_to_cpu(event.desc.opcode);

                switch (opcode) {
                case ice_mbx_opc_send_msg_to_pf:
                        ice_vc_process_vf_msg(pf, &event);
                        break;
                case ice_aqc_opc_fw_logging:
                        ice_output_fw_log(hw, &event.desc, event.msg_buf);
                        break;
                default:
                        dev_dbg(&pf->pdev->dev,
                                "%s Receive Queue unknown event 0x%04x ignored\n",
                                qtype, opcode);
                        break;
                }
        } while (pending && (i++ < ICE_DFLT_IRQ_WORK));

        devm_kfree(&pf->pdev->dev, event.msg_buf);

        return pending && (i == ICE_DFLT_IRQ_WORK);
}

/**
 * ice_ctrlq_pending - check if there is a difference between ntc and ntu
 * @hw: pointer to hardware info
 * @cq: control queue information
 *
 * returns true if there are pending messages in a queue, false if there aren't
 */
static bool ice_ctrlq_pending(struct ice_hw *hw, struct ice_ctl_q_info *cq)
{
        u16 ntu;

        ntu = (u16)(rd32(hw, cq->rq.head) & cq->rq.head_mask);
        return cq->rq.next_to_clean != ntu;
}

/**
 * ice_clean_adminq_subtask - clean the AdminQ rings
 * @pf: board private structure
 */
static void ice_clean_adminq_subtask(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;

        if (!test_bit(__ICE_ADMINQ_EVENT_PENDING, pf->state))
                return;

        if (__ice_clean_ctrlq(pf, ICE_CTL_Q_ADMIN))
                return;

        clear_bit(__ICE_ADMINQ_EVENT_PENDING, pf->state);

        /* There might be a situation where new messages arrive to a control
         * queue between processing the last message and clearing the
         * EVENT_PENDING bit. So before exiting, check queue head again (using
         * ice_ctrlq_pending) and process new messages if any.
         */
        if (ice_ctrlq_pending(hw, &hw->adminq))
                __ice_clean_ctrlq(pf, ICE_CTL_Q_ADMIN);

        ice_flush(hw);
}

/**
 * ice_clean_mailboxq_subtask - clean the MailboxQ rings
 * @pf: board private structure
 */
static void ice_clean_mailboxq_subtask(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;

        if (!test_bit(__ICE_MAILBOXQ_EVENT_PENDING, pf->state))
                return;

        if (__ice_clean_ctrlq(pf, ICE_CTL_Q_MAILBOX))
                return;

        clear_bit(__ICE_MAILBOXQ_EVENT_PENDING, pf->state);

        if (ice_ctrlq_pending(hw, &hw->mailboxq))
                __ice_clean_ctrlq(pf, ICE_CTL_Q_MAILBOX);

        ice_flush(hw);
}

/**
 * ice_service_task_schedule - schedule the service task to wake up
 * @pf: board private structure
 *
 * If not already scheduled, this puts the task into the work queue.
 */
static void ice_service_task_schedule(struct ice_pf *pf)
{
        if (!test_bit(__ICE_SERVICE_DIS, pf->state) &&
            !test_and_set_bit(__ICE_SERVICE_SCHED, pf->state) &&
            !test_bit(__ICE_NEEDS_RESTART, pf->state))
                queue_work(ice_wq, &pf->serv_task);
}

/**
 * ice_service_task_complete - finish up the service task
 * @pf: board private structure
 */
static void ice_service_task_complete(struct ice_pf *pf)
{
        WARN_ON(!test_bit(__ICE_SERVICE_SCHED, pf->state));

        /* force memory (pf->state) to sync before next service task */
        smp_mb__before_atomic();
        clear_bit(__ICE_SERVICE_SCHED, pf->state);
}

/**
 * ice_service_task_stop - stop service task and cancel works
 * @pf: board private structure
 */
static void ice_service_task_stop(struct ice_pf *pf)
{
        set_bit(__ICE_SERVICE_DIS, pf->state);

        if (pf->serv_tmr.function)
                del_timer_sync(&pf->serv_tmr);
        if (pf->serv_task.func)
                cancel_work_sync(&pf->serv_task);

        clear_bit(__ICE_SERVICE_SCHED, pf->state);
}

/**
 * ice_service_task_restart - restart service task and schedule works
 * @pf: board private structure
 *
 * This function is needed for suspend and resume works (e.g WoL scenario)
 */
static void ice_service_task_restart(struct ice_pf *pf)
{
        clear_bit(__ICE_SERVICE_DIS, pf->state);
        ice_service_task_schedule(pf);
}

/**
 * ice_service_timer - timer callback to schedule service task
 * @t: pointer to timer_list
 */
static void ice_service_timer(struct timer_list *t)
{
        struct ice_pf *pf = from_timer(pf, t, serv_tmr);

        mod_timer(&pf->serv_tmr, round_jiffies(pf->serv_tmr_period + jiffies));
        ice_service_task_schedule(pf);
}

/**
 * ice_handle_mdd_event - handle malicious driver detect event
 * @pf: pointer to the PF structure
 *
 * Called from service task. OICR interrupt handler indicates MDD event
 */
static void ice_handle_mdd_event(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;
        bool mdd_detected = false;
        u32 reg;
        int i;

        if (!test_bit(__ICE_MDD_EVENT_PENDING, pf->state))
                return;

        /* find what triggered the MDD event */
        reg = rd32(hw, GL_MDET_TX_PQM);
        if (reg & GL_MDET_TX_PQM_VALID_M) {
                u8 pf_num = (reg & GL_MDET_TX_PQM_PF_NUM_M) >>
                                GL_MDET_TX_PQM_PF_NUM_S;
                u16 vf_num = (reg & GL_MDET_TX_PQM_VF_NUM_M) >>
                                GL_MDET_TX_PQM_VF_NUM_S;
                u8 event = (reg & GL_MDET_TX_PQM_MAL_TYPE_M) >>
                                GL_MDET_TX_PQM_MAL_TYPE_S;
                u16 queue = ((reg & GL_MDET_TX_PQM_QNUM_M) >>
                                GL_MDET_TX_PQM_QNUM_S);

                if (netif_msg_tx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event %d on TX queue %d PF# %d VF# %d\n",
                                 event, queue, pf_num, vf_num);
                wr32(hw, GL_MDET_TX_PQM, 0xffffffff);
                mdd_detected = true;
        }

        reg = rd32(hw, GL_MDET_TX_TCLAN);
        if (reg & GL_MDET_TX_TCLAN_VALID_M) {
                u8 pf_num = (reg & GL_MDET_TX_TCLAN_PF_NUM_M) >>
                                GL_MDET_TX_TCLAN_PF_NUM_S;
                u16 vf_num = (reg & GL_MDET_TX_TCLAN_VF_NUM_M) >>
                                GL_MDET_TX_TCLAN_VF_NUM_S;
                u8 event = (reg & GL_MDET_TX_TCLAN_MAL_TYPE_M) >>
                                GL_MDET_TX_TCLAN_MAL_TYPE_S;
                u16 queue = ((reg & GL_MDET_TX_TCLAN_QNUM_M) >>
                                GL_MDET_TX_TCLAN_QNUM_S);

                if (netif_msg_rx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event %d on TX queue %d PF# %d VF# %d\n",
                                 event, queue, pf_num, vf_num);
                wr32(hw, GL_MDET_TX_TCLAN, 0xffffffff);
                mdd_detected = true;
        }

        reg = rd32(hw, GL_MDET_RX);
        if (reg & GL_MDET_RX_VALID_M) {
                u8 pf_num = (reg & GL_MDET_RX_PF_NUM_M) >>
                                GL_MDET_RX_PF_NUM_S;
                u16 vf_num = (reg & GL_MDET_RX_VF_NUM_M) >>
                                GL_MDET_RX_VF_NUM_S;
                u8 event = (reg & GL_MDET_RX_MAL_TYPE_M) >>
                                GL_MDET_RX_MAL_TYPE_S;
                u16 queue = ((reg & GL_MDET_RX_QNUM_M) >>
                                GL_MDET_RX_QNUM_S);

                if (netif_msg_rx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event %d on RX queue %d PF# %d VF# %d\n",
                                 event, queue, pf_num, vf_num);
                wr32(hw, GL_MDET_RX, 0xffffffff);
                mdd_detected = true;
        }

        if (mdd_detected) {
                bool pf_mdd_detected = false;

                reg = rd32(hw, PF_MDET_TX_PQM);
                if (reg & PF_MDET_TX_PQM_VALID_M) {
                        wr32(hw, PF_MDET_TX_PQM, 0xFFFF);
                        dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");
                        pf_mdd_detected = true;
                }

                reg = rd32(hw, PF_MDET_TX_TCLAN);
                if (reg & PF_MDET_TX_TCLAN_VALID_M) {
                        wr32(hw, PF_MDET_TX_TCLAN, 0xFFFF);
                        dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");
                        pf_mdd_detected = true;
                }

                reg = rd32(hw, PF_MDET_RX);
                if (reg & PF_MDET_RX_VALID_M) {
                        wr32(hw, PF_MDET_RX, 0xFFFF);
                        dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n");
                        pf_mdd_detected = true;
                }
                /* Queue belongs to the PF initiate a reset */
                if (pf_mdd_detected) {
                        set_bit(__ICE_NEEDS_RESTART, pf->state);
                        ice_service_task_schedule(pf);

                }
        }

        /* see if one of the VFs needs to be reset */
        for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
                struct ice_vf *vf = &pf->vf[i];

                reg = rd32(hw, VP_MDET_TX_PQM(i));
                if (reg & VP_MDET_TX_PQM_VALID_M) {
                        wr32(hw, VP_MDET_TX_PQM(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
                                 i);
                }

                reg = rd32(hw, VP_MDET_TX_TCLAN(i));
                if (reg & VP_MDET_TX_TCLAN_VALID_M) {
                        wr32(hw, VP_MDET_TX_TCLAN(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
                                 i);
                }

                reg = rd32(hw, VP_MDET_TX_TDPU(i));
                if (reg & VP_MDET_TX_TDPU_VALID_M) {
                        wr32(hw, VP_MDET_TX_TDPU(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
                                 i);
                }

                reg = rd32(hw, VP_MDET_RX(i));
                if (reg & VP_MDET_RX_VALID_M) {
                        wr32(hw, VP_MDET_RX(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
                                 i);
                }

                if (vf->num_mdd_events > ICE_DFLT_NUM_MDD_EVENTS_ALLOWED) {
                        dev_info(&pf->pdev->dev,
                                 "Too many MDD events on VF %d, disabled\n", i);
                        dev_info(&pf->pdev->dev,
                                 "Use PF Control I/F to re-enable the VF\n");
                        set_bit(ICE_VF_STATE_DIS, vf->vf_states);
                }
        }

        /* re-enable MDD interrupt cause */
        clear_bit(__ICE_MDD_EVENT_PENDING, pf->state);
        reg = rd32(hw, PFINT_OICR_ENA);
        reg |= PFINT_OICR_MAL_DETECT_M;
        wr32(hw, PFINT_OICR_ENA, reg);
        ice_flush(hw);
}

/**
 * ice_service_task - manage and run subtasks
 * @work: pointer to work_struct contained by the PF struct
 */
static void ice_service_task(struct work_struct *work)
{
        struct ice_pf *pf = container_of(work, struct ice_pf, serv_task);
        unsigned long start_time = jiffies;

        /* subtasks */

        /* process reset requests first */
        ice_reset_subtask(pf);

        /* bail if a reset/recovery cycle is pending or rebuild failed */
        if (ice_is_reset_in_progress(pf->state) ||
            test_bit(__ICE_SUSPENDED, pf->state) ||
            test_bit(__ICE_NEEDS_RESTART, pf->state)) {
                ice_service_task_complete(pf);
                return;
        }

        ice_check_for_hang_subtask(pf);
        ice_sync_fltr_subtask(pf);
        ice_handle_mdd_event(pf);
        ice_process_vflr_event(pf);
        ice_watchdog_subtask(pf);
        ice_clean_adminq_subtask(pf);
        ice_clean_mailboxq_subtask(pf);

        /* Clear __ICE_SERVICE_SCHED flag to allow scheduling next event */
        ice_service_task_complete(pf);

        /* If the tasks have taken longer than one service timer period
         * or there is more work to be done, reset the service timer to
         * schedule the service task now.
         */
        if (time_after(jiffies, (start_time + pf->serv_tmr_period)) ||
            test_bit(__ICE_MDD_EVENT_PENDING, pf->state) ||
            test_bit(__ICE_VFLR_EVENT_PENDING, pf->state) ||
            test_bit(__ICE_MAILBOXQ_EVENT_PENDING, pf->state) ||
            test_bit(__ICE_ADMINQ_EVENT_PENDING, pf->state))
                mod_timer(&pf->serv_tmr, jiffies);
}

/**
 * ice_set_ctrlq_len - helper function to set controlq length
 * @hw: pointer to the hw instance
 */
static void ice_set_ctrlq_len(struct ice_hw *hw)
{
        hw->adminq.num_rq_entries = ICE_AQ_LEN;
        hw->adminq.num_sq_entries = ICE_AQ_LEN;
        hw->adminq.rq_buf_size = ICE_AQ_MAX_BUF_LEN;
        hw->adminq.sq_buf_size = ICE_AQ_MAX_BUF_LEN;
        hw->mailboxq.num_rq_entries = ICE_MBXQ_LEN;
        hw->mailboxq.num_sq_entries = ICE_MBXQ_LEN;
        hw->mailboxq.rq_buf_size = ICE_MBXQ_MAX_BUF_LEN;
        hw->mailboxq.sq_buf_size = ICE_MBXQ_MAX_BUF_LEN;
}

/**
 * ice_irq_affinity_notify - Callback for affinity changes
 * @notify: context as to what irq was changed
 * @mask: the new affinity mask
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * so that we may register to receive changes to the irq affinity masks.
 */
static void ice_irq_affinity_notify(struct irq_affinity_notify *notify,
                                    const cpumask_t *mask)
{
        struct ice_q_vector *q_vector =
                container_of(notify, struct ice_q_vector, affinity_notify);

        cpumask_copy(&q_vector->affinity_mask, mask);
}

/**
 * ice_irq_affinity_release - Callback for affinity notifier release
 * @ref: internal core kernel usage
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * to inform the current notification subscriber that they will no longer
 * receive notifications.
 */
static void ice_irq_affinity_release(struct kref __always_unused *ref) {}

/**
 * ice_vsi_ena_irq - Enable IRQ for the given VSI
 * @vsi: the VSI being configured
 */
static int ice_vsi_ena_irq(struct ice_vsi *vsi)
{
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;

        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags)) {
                int i;

                for (i = 0; i < vsi->num_q_vectors; i++)
                        ice_irq_dynamic_ena(hw, vsi, vsi->q_vectors[i]);
        }

        ice_flush(hw);
        return 0;
}

/**
 * ice_vsi_req_irq_msix - get MSI-X vectors from the OS for the VSI
 * @vsi: the VSI being configured
 * @basename: name for the vector
 */
static int ice_vsi_req_irq_msix(struct ice_vsi *vsi, char *basename)
{
        int q_vectors = vsi->num_q_vectors;
        struct ice_pf *pf = vsi->back;
        int base = vsi->sw_base_vector;
        int rx_int_idx = 0;
        int tx_int_idx = 0;
        int vector, err;
        int irq_num;

        for (vector = 0; vector < q_vectors; vector++) {
                struct ice_q_vector *q_vector = vsi->q_vectors[vector];

                irq_num = pf->msix_entries[base + vector].vector;

                if (q_vector->tx.ring && q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "TxRx", rx_int_idx++);
                        tx_int_idx++;
                } else if (q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "rx", rx_int_idx++);
                } else if (q_vector->tx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "tx", tx_int_idx++);
                } else {
                        /* skip this unused q_vector */
                        continue;
                }
                err = devm_request_irq(&pf->pdev->dev,
                                       pf->msix_entries[base + vector].vector,
                                       vsi->irq_handler, 0, q_vector->name,
                                       q_vector);
                if (err) {
                        netdev_err(vsi->netdev,
                                   "MSIX request_irq failed, error: %d\n", err);
                        goto free_q_irqs;
                }

                /* register for affinity change notifications */
                q_vector->affinity_notify.notify = ice_irq_affinity_notify;
                q_vector->affinity_notify.release = ice_irq_affinity_release;
                irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);

                /* assign the mask for this irq */
                irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
        }

        vsi->irqs_ready = true;
        return 0;

free_q_irqs:
        while (vector) {
                vector--;
                irq_num = pf->msix_entries[base + vector].vector,
                irq_set_affinity_notifier(irq_num, NULL);
                irq_set_affinity_hint(irq_num, NULL);
                devm_free_irq(&pf->pdev->dev, irq_num, &vsi->q_vectors[vector]);
        }
        return err;
}

/**
 * ice_ena_misc_vector - enable the non-queue interrupts
 * @pf: board private structure
 */
static void ice_ena_misc_vector(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;
        u32 val;

        /* clear things first */
        wr32(hw, PFINT_OICR_ENA, 0);    /* disable all */
        rd32(hw, PFINT_OICR);           /* read to clear */

        val = (PFINT_OICR_ECC_ERR_M |
               PFINT_OICR_MAL_DETECT_M |
               PFINT_OICR_GRST_M |
               PFINT_OICR_PCI_EXCEPTION_M |
               PFINT_OICR_VFLR_M |
               PFINT_OICR_HMC_ERR_M |
               PFINT_OICR_PE_CRITERR_M);

        wr32(hw, PFINT_OICR_ENA, val);

        /* SW_ITR_IDX = 0, but don't change INTENA */
        wr32(hw, GLINT_DYN_CTL(pf->hw_oicr_idx),
             GLINT_DYN_CTL_SW_ITR_INDX_M | GLINT_DYN_CTL_INTENA_MSK_M);
}

/**
 * ice_misc_intr - misc interrupt handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 */
static irqreturn_t ice_misc_intr(int __always_unused irq, void *data)
{
        struct ice_pf *pf = (struct ice_pf *)data;
        struct ice_hw *hw = &pf->hw;
        irqreturn_t ret = IRQ_NONE;
        u32 oicr, ena_mask;

        set_bit(__ICE_ADMINQ_EVENT_PENDING, pf->state);
        set_bit(__ICE_MAILBOXQ_EVENT_PENDING, pf->state);

        oicr = rd32(hw, PFINT_OICR);
        ena_mask = rd32(hw, PFINT_OICR_ENA);

        if (oicr & PFINT_OICR_MAL_DETECT_M) {
                ena_mask &= ~PFINT_OICR_MAL_DETECT_M;
                set_bit(__ICE_MDD_EVENT_PENDING, pf->state);
        }
        if (oicr & PFINT_OICR_VFLR_M) {
                ena_mask &= ~PFINT_OICR_VFLR_M;
                set_bit(__ICE_VFLR_EVENT_PENDING, pf->state);
        }

        if (oicr & PFINT_OICR_GRST_M) {
                u32 reset;

                /* we have a reset warning */
                ena_mask &= ~PFINT_OICR_GRST_M;
                reset = (rd32(hw, GLGEN_RSTAT) & GLGEN_RSTAT_RESET_TYPE_M) >>
                        GLGEN_RSTAT_RESET_TYPE_S;

                if (reset == ICE_RESET_CORER)
                        pf->corer_count++;
                else if (reset == ICE_RESET_GLOBR)
                        pf->globr_count++;
                else if (reset == ICE_RESET_EMPR)
                        pf->empr_count++;
                else
                        dev_dbg(&pf->pdev->dev, "Invalid reset type %d\n",
                                reset);

                /* If a reset cycle isn't already in progress, we set a bit in
                 * pf->state so that the service task can start a reset/rebuild.
                 * We also make note of which reset happened so that peer
                 * devices/drivers can be informed.
                 */
                if (!test_and_set_bit(__ICE_RESET_OICR_RECV, pf->state)) {
                        if (reset == ICE_RESET_CORER)
                                set_bit(__ICE_CORER_RECV, pf->state);
                        else if (reset == ICE_RESET_GLOBR)
                                set_bit(__ICE_GLOBR_RECV, pf->state);
                        else
                                set_bit(__ICE_EMPR_RECV, pf->state);

                        /* There are couple of different bits at play here.
                         * hw->reset_ongoing indicates whether the hardware is
                         * in reset. This is set to true when a reset interrupt
                         * is received and set back to false after the driver
                         * has determined that the hardware is out of reset.
                         *
                         * __ICE_RESET_OICR_RECV in pf->state indicates
                         * that a post reset rebuild is required before the
                         * driver is operational again. This is set above.
                         *
                         * As this is the start of the reset/rebuild cycle, set
                         * both to indicate that.
                         */
                        hw->reset_ongoing = true;
                }
        }

        if (oicr & PFINT_OICR_HMC_ERR_M) {
                ena_mask &= ~PFINT_OICR_HMC_ERR_M;
                dev_dbg(&pf->pdev->dev,
                        "HMC Error interrupt - info 0x%x, data 0x%x\n",
                        rd32(hw, PFHMC_ERRORINFO),
                        rd32(hw, PFHMC_ERRORDATA));
        }

        /* Report and mask off any remaining unexpected interrupts */
        oicr &= ena_mask;
        if (oicr) {
                dev_dbg(&pf->pdev->dev, "unhandled interrupt oicr=0x%08x\n",
                        oicr);
                /* If a critical error is pending there is no choice but to
                 * reset the device.
                 */
                if (oicr & (PFINT_OICR_PE_CRITERR_M |
                            PFINT_OICR_PCI_EXCEPTION_M |
                            PFINT_OICR_ECC_ERR_M)) {
                        set_bit(__ICE_PFR_REQ, pf->state);
                        ice_service_task_schedule(pf);
                }
                ena_mask &= ~oicr;
        }
        ret = IRQ_HANDLED;

        /* re-enable interrupt causes that are not handled during this pass */
        wr32(hw, PFINT_OICR_ENA, ena_mask);
        if (!test_bit(__ICE_DOWN, pf->state)) {
                ice_service_task_schedule(pf);
                ice_irq_dynamic_ena(hw, NULL, NULL);
        }

        return ret;
}

/**
 * ice_dis_ctrlq_interrupts - disable control queue interrupts
 * @hw: pointer to HW structure
 */
static void ice_dis_ctrlq_interrupts(struct ice_hw *hw)
{
        /* disable Admin queue Interrupt causes */
        wr32(hw, PFINT_FW_CTL,
             rd32(hw, PFINT_FW_CTL) & ~PFINT_FW_CTL_CAUSE_ENA_M);

        /* disable Mailbox queue Interrupt causes */
        wr32(hw, PFINT_MBX_CTL,
             rd32(hw, PFINT_MBX_CTL) & ~PFINT_MBX_CTL_CAUSE_ENA_M);

        /* disable Control queue Interrupt causes */
        wr32(hw, PFINT_OICR_CTL,
             rd32(hw, PFINT_OICR_CTL) & ~PFINT_OICR_CTL_CAUSE_ENA_M);

        ice_flush(hw);
}

/**
 * ice_free_irq_msix_misc - Unroll misc vector setup
 * @pf: board private structure
 */
static void ice_free_irq_msix_misc(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;

        ice_dis_ctrlq_interrupts(hw);

        /* disable OICR interrupt */
        wr32(hw, PFINT_OICR_ENA, 0);
        ice_flush(hw);

        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags) && pf->msix_entries) {
                synchronize_irq(pf->msix_entries[pf->sw_oicr_idx].vector);
                devm_free_irq(&pf->pdev->dev,
                              pf->msix_entries[pf->sw_oicr_idx].vector, pf);
        }

        pf->num_avail_sw_msix += 1;
        ice_free_res(pf->sw_irq_tracker, pf->sw_oicr_idx, ICE_RES_MISC_VEC_ID);
        pf->num_avail_hw_msix += 1;
        ice_free_res(pf->hw_irq_tracker, pf->hw_oicr_idx, ICE_RES_MISC_VEC_ID);
}

/**
 * ice_ena_ctrlq_interrupts - enable control queue interrupts
 * @hw: pointer to HW structure
 * @v_idx: HW vector index to associate the control queue interrupts with
 */
static void ice_ena_ctrlq_interrupts(struct ice_hw *hw, u16 v_idx)
{
        u32 val;

        val = ((v_idx & PFINT_OICR_CTL_MSIX_INDX_M) |
               PFINT_OICR_CTL_CAUSE_ENA_M);
        wr32(hw, PFINT_OICR_CTL, val);

        /* enable Admin queue Interrupt causes */
        val = ((v_idx & PFINT_FW_CTL_MSIX_INDX_M) |
               PFINT_FW_CTL_CAUSE_ENA_M);
        wr32(hw, PFINT_FW_CTL, val);

        /* enable Mailbox queue Interrupt causes */
        val = ((v_idx & PFINT_MBX_CTL_MSIX_INDX_M) |
               PFINT_MBX_CTL_CAUSE_ENA_M);
        wr32(hw, PFINT_MBX_CTL, val);

        ice_flush(hw);
}

/**
 * ice_req_irq_msix_misc - Setup the misc vector to handle non queue events
 * @pf: board private structure
 *
 * This sets up the handler for MSIX 0, which is used to manage the
 * non-queue interrupts, e.g. AdminQ and errors. This is not used
 * when in MSI or Legacy interrupt mode.
 */
static int ice_req_irq_msix_misc(struct ice_pf *pf)
{
        struct ice_hw *hw = &pf->hw;
        int oicr_idx, err = 0;

        if (!pf->int_name[0])
                snprintf(pf->int_name, sizeof(pf->int_name) - 1, "%s-%s:misc",
                         dev_driver_string(&pf->pdev->dev),
                         dev_name(&pf->pdev->dev));

        /* Do not request IRQ but do enable OICR interrupt since settings are
         * lost during reset. Note that this function is called only during
         * rebuild path and not while reset is in progress.
         */
        if (ice_is_reset_in_progress(pf->state))
                goto skip_req_irq;

        /* reserve one vector in sw_irq_tracker for misc interrupts */
        oicr_idx = ice_get_res(pf, pf->sw_irq_tracker, 1, ICE_RES_MISC_VEC_ID);
        if (oicr_idx < 0)
                return oicr_idx;

        pf->num_avail_sw_msix -= 1;
        pf->sw_oicr_idx = oicr_idx;

        /* reserve one vector in hw_irq_tracker for misc interrupts */
        oicr_idx = ice_get_res(pf, pf->hw_irq_tracker, 1, ICE_RES_MISC_VEC_ID);
        if (oicr_idx < 0) {
                ice_free_res(pf->sw_irq_tracker, 1, ICE_RES_MISC_VEC_ID);
                pf->num_avail_sw_msix += 1;
                return oicr_idx;
        }
        pf->num_avail_hw_msix -= 1;
        pf->hw_oicr_idx = oicr_idx;

        err = devm_request_irq(&pf->pdev->dev,
                               pf->msix_entries[pf->sw_oicr_idx].vector,
                               ice_misc_intr, 0, pf->int_name, pf);
        if (err) {
                dev_err(&pf->pdev->dev,
                        "devm_request_irq for %s failed: %d\n",
                        pf->int_name, err);
                ice_free_res(pf->sw_irq_tracker, 1, ICE_RES_MISC_VEC_ID);
                pf->num_avail_sw_msix += 1;
                ice_free_res(pf->hw_irq_tracker, 1, ICE_RES_MISC_VEC_ID);
                pf->num_avail_hw_msix += 1;
                return err;
        }

skip_req_irq:
        ice_ena_misc_vector(pf);

        ice_ena_ctrlq_interrupts(hw, pf->hw_oicr_idx);
        wr32(hw, GLINT_ITR(ICE_RX_ITR, pf->hw_oicr_idx),
             ITR_REG_ALIGN(ICE_ITR_8K) >> ICE_ITR_GRAN_S);

        ice_flush(hw);
        ice_irq_dynamic_ena(hw, NULL, NULL);

        return 0;
}

/**
 * ice_napi_del - Remove NAPI handler for the VSI
 * @vsi: VSI for which NAPI handler is to be removed
 */
void ice_napi_del(struct ice_vsi *vsi)
{
        int v_idx;

        if (!vsi->netdev)
                return;

        for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
                netif_napi_del(&vsi->q_vectors[v_idx]->napi);
}

/**
 * ice_napi_add - register NAPI handler for the VSI
 * @vsi: VSI for which NAPI handler is to be registered
 *
 * This function is only called in the driver's load path. Registering the NAPI
 * handler is done in ice_vsi_alloc_q_vector() for all other cases (i.e. resume,
 * reset/rebuild, etc.)
 */
static void ice_napi_add(struct ice_vsi *vsi)
{
        int v_idx;

        if (!vsi->netdev)
                return;

        for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
                netif_napi_add(vsi->netdev, &vsi->q_vectors[v_idx]->napi,
                               ice_napi_poll, NAPI_POLL_WEIGHT);
}

/**
 * ice_cfg_netdev - Allocate, configure and register a netdev
 * @vsi: the VSI associated with the new netdev
 *
 * Returns 0 on success, negative value on failure
 */
static int ice_cfg_netdev(struct ice_vsi *vsi)
{
        netdev_features_t csumo_features;
        netdev_features_t vlano_features;
        netdev_features_t dflt_features;
        netdev_features_t tso_features;
        struct ice_netdev_priv *np;
        struct net_device *netdev;
        u8 mac_addr[ETH_ALEN];
        int err;

        netdev = alloc_etherdev_mqs(sizeof(*np), vsi->alloc_txq,
                                    vsi->alloc_rxq);
        if (!netdev)
                return -ENOMEM;

        vsi->netdev = netdev;
        np = netdev_priv(netdev);
        np->vsi = vsi;

        dflt_features = NETIF_F_SG      |
                        NETIF_F_HIGHDMA |
                        NETIF_F_RXHASH;

        csumo_features = NETIF_F_RXCSUM   |
                         NETIF_F_IP_CSUM  |
                         NETIF_F_SCTP_CRC |
                         NETIF_F_IPV6_CSUM;

        vlano_features = NETIF_F_HW_VLAN_CTAG_FILTER |
                         NETIF_F_HW_VLAN_CTAG_TX     |
                         NETIF_F_HW_VLAN_CTAG_RX;

        tso_features = NETIF_F_TSO;

        /* set features that user can change */
        netdev->hw_features = dflt_features | csumo_features |
                              vlano_features | tso_features;

        /* enable features */
        netdev->features |= netdev->hw_features;
        /* encap and VLAN devices inherit default, csumo and tso features */
        netdev->hw_enc_features |= dflt_features | csumo_features |
                                   tso_features;
        netdev->vlan_features |= dflt_features | csumo_features |
                                 tso_features;

        if (vsi->type == ICE_VSI_PF) {
                SET_NETDEV_DEV(netdev, &vsi->back->pdev->dev);
                ether_addr_copy(mac_addr, vsi->port_info->mac.perm_addr);

                ether_addr_copy(netdev->dev_addr, mac_addr);
                ether_addr_copy(netdev->perm_addr, mac_addr);
        }

        netdev->priv_flags |= IFF_UNICAST_FLT;

        /* assign netdev_ops */
        netdev->netdev_ops = &ice_netdev_ops;

        /* setup watchdog timeout value to be 5 second */
        netdev->watchdog_timeo = 5 * HZ;

        ice_set_ethtool_ops(netdev);

        netdev->extended->min_mtu = ETH_MIN_MTU;
        netdev->extended->max_mtu = ICE_MAX_MTU;

        err = register_netdev(vsi->netdev);
        if (err)
                return err;

        netif_carrier_off(vsi->netdev);

        /* make sure transmit queues start off as stopped */
        netif_tx_stop_all_queues(vsi->netdev);

        return 0;
}

/**
 * ice_fill_rss_lut - Fill the RSS lookup table with default values
 * @lut: Lookup table
 * @rss_table_size: Lookup table size
 * @rss_size: Range of queue number for hashing
 */
void ice_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
{
        u16 i;

        for (i = 0; i < rss_table_size; i++)
                lut[i] = i % rss_size;
}

/**
 * ice_pf_vsi_setup - Set up a PF VSI
 * @pf: board private structure
 * @pi: pointer to the port_info instance
 *
 * Returns pointer to the successfully allocated VSI sw struct on success,
 * otherwise returns NULL on failure.
 */
static struct ice_vsi *
ice_pf_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi)
{
        return ice_vsi_setup(pf, pi, ICE_VSI_PF, ICE_INVAL_VFID);
}

/**
 * ice_vlan_rx_add_vid - Add a vlan id filter to HW offload
 * @netdev: network interface to be adjusted
 * @proto: unused protocol
 * @vid: vlan id to be added
 *
 * net_device_ops implementation for adding vlan ids
 */
static int ice_vlan_rx_add_vid(struct net_device *netdev,
                               __always_unused __be16 proto, u16 vid)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;

        if (vid >= VLAN_N_VID) {
                netdev_err(netdev, "VLAN id requested %d is out of range %d\n",
                           vid, VLAN_N_VID);
                return -EINVAL;
        }

        if (vsi->info.pvid)
                return -EINVAL;

        /* Enable VLAN pruning when VLAN 0 is added */
        if (unlikely(!vid)) {
                int ret = ice_cfg_vlan_pruning(vsi, true);

                if (ret)
                        return ret;
        }

        /* Add all VLAN ids including 0 to the switch filter. VLAN id 0 is
         * needed to continue allowing all untagged packets since VLAN prune
         * list is applied to all packets by the switch
         */
        return ice_vsi_add_vlan(vsi, vid);
}

/**
 * ice_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
 * @netdev: network interface to be adjusted
 * @proto: unused protocol
 * @vid: vlan id to be removed
 *
 * net_device_ops implementation for removing vlan ids
 */
static int ice_vlan_rx_kill_vid(struct net_device *netdev,
                                __always_unused __be16 proto, u16 vid)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;
        int status;

        if (vsi->info.pvid)
                return -EINVAL;

        /* Make sure ice_vsi_kill_vlan is successful before updating VLAN
         * information
         */
        status = ice_vsi_kill_vlan(vsi, vid);
        if (status)
                return status;

        /* Disable VLAN pruning when VLAN 0 is removed */
        if (unlikely(!vid))
                status = ice_cfg_vlan_pruning(vsi, false);

        return status;
}

/**
 * ice_setup_pf_sw - Setup the HW switch on startup or after reset
 * @pf: board private structure
 *
 * Returns 0 on success, negative value on failure
 */
static int ice_setup_pf_sw(struct ice_pf *pf)
{
        LIST_HEAD(tmp_add_list);
        u8 broadcast[ETH_ALEN];
        struct ice_vsi *vsi;
        int status = 0;

        if (ice_is_reset_in_progress(pf->state))
                return -EBUSY;

        vsi = ice_pf_vsi_setup(pf, pf->hw.port_info);
        if (!vsi) {
                status = -ENOMEM;
                goto unroll_vsi_setup;
        }

        status = ice_cfg_netdev(vsi);
        if (status) {
                status = -ENODEV;
                goto unroll_vsi_setup;
        }

        /* registering the NAPI handler requires both the queues and
         * netdev to be created, which are done in ice_pf_vsi_setup()
         * and ice_cfg_netdev() respectively
         */
        ice_napi_add(vsi);

        /* To add a MAC filter, first add the MAC to a list and then
         * pass the list to ice_add_mac.
         */

         /* Add a unicast MAC filter so the VSI can get its packets */
        status = ice_add_mac_to_list(vsi, &tmp_add_list,
                                     vsi->port_info->mac.perm_addr);
        if (status)
                goto unroll_napi_add;

        /* VSI needs to receive broadcast traffic, so add the broadcast
         * MAC address to the list as well.
         */
        eth_broadcast_addr(broadcast);
        status = ice_add_mac_to_list(vsi, &tmp_add_list, broadcast);
        if (status)
                goto free_mac_list;

        /* program MAC filters for entries in tmp_add_list */
        status = ice_add_mac(&pf->hw, &tmp_add_list);
        if (status) {
                dev_err(&pf->pdev->dev, "Could not add MAC filters\n");
                status = -ENOMEM;
                goto free_mac_list;
        }

        ice_free_fltr_list(&pf->pdev->dev, &tmp_add_list);
        return status;

free_mac_list:
        ice_free_fltr_list(&pf->pdev->dev, &tmp_add_list);

unroll_napi_add:
        if (vsi) {
                ice_napi_del(vsi);
                if (vsi->netdev) {
                        if (vsi->netdev->reg_state == NETREG_REGISTERED)
                                unregister_netdev(vsi->netdev);
                        free_netdev(vsi->netdev);
                        vsi->netdev = NULL;
                }
        }

unroll_vsi_setup:
        if (vsi) {
                ice_vsi_free_q_vectors(vsi);
                ice_vsi_delete(vsi);
                ice_vsi_put_qs(vsi);
                pf->q_left_tx += vsi->alloc_txq;
                pf->q_left_rx += vsi->alloc_rxq;
                ice_vsi_clear(vsi);
        }
        return status;
}

/**
 * ice_determine_q_usage - Calculate queue distribution
 * @pf: board private structure
 *
 * Return -ENOMEM if we don't get enough queues for all ports
 */
static void ice_determine_q_usage(struct ice_pf *pf)
{
        u16 q_left_tx, q_left_rx;

        q_left_tx = pf->hw.func_caps.common_cap.num_txq;
        q_left_rx = pf->hw.func_caps.common_cap.num_rxq;

        pf->num_lan_tx = min_t(int, q_left_tx, num_online_cpus());

        /* only 1 Rx queue unless RSS is enabled */
        if (!test_bit(ICE_FLAG_RSS_ENA, pf->flags))
                pf->num_lan_rx = 1;
        else
                pf->num_lan_rx = min_t(int, q_left_rx, num_online_cpus());

        pf->q_left_tx = q_left_tx - pf->num_lan_tx;
        pf->q_left_rx = q_left_rx - pf->num_lan_rx;
}

/**
 * ice_deinit_pf - Unrolls initialziations done by ice_init_pf
 * @pf: board private structure to initialize
 */
static void ice_deinit_pf(struct ice_pf *pf)
{
        ice_service_task_stop(pf);
        mutex_destroy(&pf->sw_mutex);
        mutex_destroy(&pf->avail_q_mutex);
}

/**
 * ice_init_pf - Initialize general software structures (struct ice_pf)
 * @pf: board private structure to initialize
 */
static void ice_init_pf(struct ice_pf *pf)
{
        bitmap_zero(pf->flags, ICE_PF_FLAGS_NBITS);
        set_bit(ICE_FLAG_MSIX_ENA, pf->flags);
#ifdef CONFIG_PCI_IOV
        if (pf->hw.func_caps.common_cap.sr_iov_1_1) {
                struct ice_hw *hw = &pf->hw;

                set_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags);
                pf->num_vfs_supported = min_t(int, hw->func_caps.num_allocd_vfs,
                                              ICE_MAX_VF_COUNT);
        }
#endif /* CONFIG_PCI_IOV */

        mutex_init(&pf->sw_mutex);
        mutex_init(&pf->avail_q_mutex);

        /* Clear avail_[t|r]x_qs bitmaps (set all to avail) */
        mutex_lock(&pf->avail_q_mutex);
        bitmap_zero(pf->avail_txqs, ICE_MAX_TXQS);
        bitmap_zero(pf->avail_rxqs, ICE_MAX_RXQS);
        mutex_unlock(&pf->avail_q_mutex);

        if (pf->hw.func_caps.common_cap.rss_table_size)
                set_bit(ICE_FLAG_RSS_ENA, pf->flags);

        /* setup service timer and periodic service task */
        timer_setup(&pf->serv_tmr, ice_service_timer, 0);
        pf->serv_tmr_period = HZ;
        INIT_WORK(&pf->serv_task, ice_service_task);
        clear_bit(__ICE_SERVICE_SCHED, pf->state);
}

/**
 * ice_ena_msix_range - Request a range of MSIX vectors from the OS
 * @pf: board private structure
 *
 * compute the number of MSIX vectors required (v_budget) and request from
 * the OS. Return the number of vectors reserved or negative on failure
 */
static int ice_ena_msix_range(struct ice_pf *pf)
{
        int v_left, v_actual, v_budget = 0;
        int needed, err, i;

        v_left = pf->hw.func_caps.common_cap.num_msix_vectors;

        /* reserve one vector for miscellaneous handler */
        needed = 1;
        v_budget += needed;
        v_left -= needed;

        /* reserve vectors for LAN traffic */
        pf->num_lan_msix = min_t(int, num_online_cpus(), v_left);
        v_budget += pf->num_lan_msix;
        v_left -= pf->num_lan_msix;

        pf->msix_entries = devm_kcalloc(&pf->pdev->dev, v_budget,
                                        sizeof(*pf->msix_entries), GFP_KERNEL);

        if (!pf->msix_entries) {
                err = -ENOMEM;
                goto exit_err;
        }

        for (i = 0; i < v_budget; i++)
                pf->msix_entries[i].entry = i;

        /* actually reserve the vectors */
        v_actual = pci_enable_msix_range(pf->pdev, pf->msix_entries,
                                         ICE_MIN_MSIX, v_budget);

        if (v_actual < 0) {
                dev_err(&pf->pdev->dev, "unable to reserve MSI-X vectors\n");
                err = v_actual;
                goto msix_err;
        }

        if (v_actual < v_budget) {
                dev_warn(&pf->pdev->dev,
                         "not enough vectors. requested = %d, obtained = %d\n",
                         v_budget, v_actual);
                if (v_actual >= (pf->num_lan_msix + 1)) {
                        pf->num_avail_sw_msix = v_actual -
                                                (pf->num_lan_msix + 1);
                } else if (v_actual >= 2) {
                        pf->num_lan_msix = 1;
                        pf->num_avail_sw_msix = v_actual - 2;
                } else {
                        pci_disable_msix(pf->pdev);
                        err = -ERANGE;
                        goto msix_err;
                }
        }

        return v_actual;

msix_err:
        devm_kfree(&pf->pdev->dev, pf->msix_entries);
        goto exit_err;

exit_err:
        pf->num_lan_msix = 0;
        clear_bit(ICE_FLAG_MSIX_ENA, pf->flags);
        return err;
}

/**
 * ice_dis_msix - Disable MSI-X interrupt setup in OS
 * @pf: board private structure
 */
static void ice_dis_msix(struct ice_pf *pf)
{
        pci_disable_msix(pf->pdev);
        devm_kfree(&pf->pdev->dev, pf->msix_entries);
        pf->msix_entries = NULL;
        clear_bit(ICE_FLAG_MSIX_ENA, pf->flags);
}

/**
 * ice_clear_interrupt_scheme - Undo things done by ice_init_interrupt_scheme
 * @pf: board private structure
 */
static void ice_clear_interrupt_scheme(struct ice_pf *pf)
{
        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags))
                ice_dis_msix(pf);

        if (pf->sw_irq_tracker) {
                devm_kfree(&pf->pdev->dev, pf->sw_irq_tracker);
                pf->sw_irq_tracker = NULL;
        }

        if (pf->hw_irq_tracker) {
                devm_kfree(&pf->pdev->dev, pf->hw_irq_tracker);
                pf->hw_irq_tracker = NULL;
        }
}

/**
 * ice_init_interrupt_scheme - Determine proper interrupt scheme
 * @pf: board private structure to initialize
 */
static int ice_init_interrupt_scheme(struct ice_pf *pf)
{
        int vectors = 0, hw_vectors = 0;

        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags))
                vectors = ice_ena_msix_range(pf);
        else
                return -ENODEV;

        if (vectors < 0)
                return vectors;

        /* set up vector assignment tracking */
        pf->sw_irq_tracker =
                devm_kzalloc(&pf->pdev->dev, sizeof(*pf->sw_irq_tracker) +
                             (sizeof(u16) * vectors), GFP_KERNEL);
        if (!pf->sw_irq_tracker) {
                ice_dis_msix(pf);
                return -ENOMEM;
        }

        /* populate SW interrupts pool with number of OS granted IRQs. */
        pf->num_avail_sw_msix = vectors;
        pf->sw_irq_tracker->num_entries = vectors;

        /* set up HW vector assignment tracking */
        hw_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
        pf->hw_irq_tracker =
                devm_kzalloc(&pf->pdev->dev, sizeof(*pf->hw_irq_tracker) +
                             (sizeof(u16) * hw_vectors), GFP_KERNEL);
        if (!pf->hw_irq_tracker) {
                ice_clear_interrupt_scheme(pf);
                return -ENOMEM;
        }

        /* populate HW interrupts pool with number of HW supported irqs. */
        pf->num_avail_hw_msix = hw_vectors;
        pf->hw_irq_tracker->num_entries = hw_vectors;

        return 0;
}

/**
 * ice_verify_itr_gran - verify driver's assumption of ITR granularity
 * @pf: pointer to the PF structure
 *
 * There is no error returned here because the driver will be able to handle a
 * different ITR granularity, but interrupt moderation will not be accurate if
 * the driver's assumptions are not verified. This assumption is made so we can
 * use constants in the hot path instead of accessing structure members.
 */
static void ice_verify_itr_gran(struct ice_pf *pf)
{
        if (pf->hw.itr_gran != (ICE_ITR_GRAN_S << 1))
                dev_warn(&pf->pdev->dev,
                         "%d ITR granularity assumption is invalid, actual ITR granularity is %d. Interrupt moderation will be inaccurate!\n",
                         (ICE_ITR_GRAN_S << 1), pf->hw.itr_gran);
}

/**
 * ice_verify_cacheline_size - verify driver's assumption of 64 Byte cache lines
 * @pf: pointer to the PF structure
 *
 * There is no error returned here because the driver should be able to handle
 * 128 Byte cache lines, so we only print a warning in case issues are seen,
 * specifically with Tx.
 */
static void ice_verify_cacheline_size(struct ice_pf *pf)
{
        if (rd32(&pf->hw, GLPCI_CNF2) & GLPCI_CNF2_CACHELINE_SIZE_M)
                dev_warn(&pf->pdev->dev,
                         "%d Byte cache line assumption is invalid, driver may have Tx timeouts!\n",
                         ICE_CACHE_LINE_BYTES);
}

/**
 * ice_probe - Device initialization routine
 * @pdev: PCI device information struct
 * @ent: entry in ice_pci_tbl
 *
 * Returns 0 on success, negative on failure
 */
static int ice_probe(struct pci_dev *pdev,
                     const struct pci_device_id __always_unused *ent)
{
        struct ice_pf *pf;
        struct ice_hw *hw;
        int err;

        /* this driver uses devres, see Documentation/driver-model/devres.txt */
        err = pcim_enable_device(pdev);
        if (err)
                return err;

        err = pcim_iomap_regions(pdev, BIT(ICE_BAR0), pci_name(pdev));
        if (err) {
                dev_err(&pdev->dev, "BAR0 I/O map error %d\n", err);
                return err;
        }

        pf = devm_kzalloc(&pdev->dev, sizeof(*pf), GFP_KERNEL);
        if (!pf)
                return -ENOMEM;

        /* set up for high or low dma */
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err)
                err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
        if (err) {
                dev_err(&pdev->dev, "DMA configuration failed: 0x%x\n", err);
                return err;
        }

        pci_enable_pcie_error_reporting(pdev);
        pci_set_master(pdev);

        pf->pdev = pdev;
        pci_set_drvdata(pdev, pf);
        set_bit(__ICE_DOWN, pf->state);
        /* Disable service task until DOWN bit is cleared */
        set_bit(__ICE_SERVICE_DIS, pf->state);

        hw = &pf->hw;
        hw->hw_addr = pcim_iomap_table(pdev)[ICE_BAR0];
        hw->back = pf;
        hw->vendor_id = pdev->vendor;
        hw->device_id = pdev->device;
        pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
        hw->subsystem_vendor_id = pdev->subsystem_vendor;
        hw->subsystem_device_id = pdev->subsystem_device;
        hw->bus.device = PCI_SLOT(pdev->devfn);
        hw->bus.func = PCI_FUNC(pdev->devfn);
        ice_set_ctrlq_len(hw);

        pf->msg_enable = netif_msg_init(debug, ICE_DFLT_NETIF_M);

#ifndef CONFIG_DYNAMIC_DEBUG
        if (debug < -1)
                hw->debug_mask = debug;
#endif

        err = ice_init_hw(hw);
        if (err) {
                dev_err(&pdev->dev, "ice_init_hw failed: %d\n", err);
                err = -EIO;
                goto err_exit_unroll;
        }

        dev_info(&pdev->dev, "firmware %d.%d.%05d api %d.%d\n",
                 hw->fw_maj_ver, hw->fw_min_ver, hw->fw_build,
                 hw->api_maj_ver, hw->api_min_ver);

        ice_init_pf(pf);

        ice_determine_q_usage(pf);

        pf->num_alloc_vsi = hw->func_caps.guar_num_vsi;
        if (!pf->num_alloc_vsi) {
                err = -EIO;
                goto err_init_pf_unroll;
        }

        pf->vsi = devm_kcalloc(&pdev->dev, pf->num_alloc_vsi,
                               sizeof(*pf->vsi), GFP_KERNEL);
        if (!pf->vsi) {
                err = -ENOMEM;
                goto err_init_pf_unroll;
        }

        err = ice_init_interrupt_scheme(pf);
        if (err) {
                dev_err(&pdev->dev,
                        "ice_init_interrupt_scheme failed: %d\n", err);
                err = -EIO;
                goto err_init_interrupt_unroll;
        }

        /* Driver is mostly up */
        clear_bit(__ICE_DOWN, pf->state);

        /* In case of MSIX we are going to setup the misc vector right here
         * to handle admin queue events etc. In case of legacy and MSI
         * the misc functionality and queue processing is combined in
         * the same vector and that gets setup at open.
         */
        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags)) {
                err = ice_req_irq_msix_misc(pf);
                if (err) {
                        dev_err(&pdev->dev,
                                "setup of misc vector failed: %d\n", err);
                        goto err_init_interrupt_unroll;
                }
        }

        /* create switch struct for the switch element created by FW on boot */
        pf->first_sw = devm_kzalloc(&pdev->dev, sizeof(*pf->first_sw),
                                    GFP_KERNEL);
        if (!pf->first_sw) {
                err = -ENOMEM;
                goto err_msix_misc_unroll;
        }

        if (hw->evb_veb)
                pf->first_sw->bridge_mode = BRIDGE_MODE_VEB;
        else
                pf->first_sw->bridge_mode = BRIDGE_MODE_VEPA;

        pf->first_sw->pf = pf;

        /* record the sw_id available for later use */
        pf->first_sw->sw_id = hw->port_info->sw_id;

        err = ice_setup_pf_sw(pf);
        if (err) {
                dev_err(&pdev->dev,
                        "probe failed due to setup pf switch:%d\n", err);
                goto err_alloc_sw_unroll;
        }

        clear_bit(__ICE_SERVICE_DIS, pf->state);

        /* since everything is good, start the service timer */
        mod_timer(&pf->serv_tmr, round_jiffies(jiffies + pf->serv_tmr_period));

        ice_verify_cacheline_size(pf);
        ice_verify_itr_gran(pf);

        return 0;

err_alloc_sw_unroll:
        set_bit(__ICE_SERVICE_DIS, pf->state);
        set_bit(__ICE_DOWN, pf->state);
        devm_kfree(&pf->pdev->dev, pf->first_sw);
err_msix_misc_unroll:
        ice_free_irq_msix_misc(pf);
err_init_interrupt_unroll:
        ice_clear_interrupt_scheme(pf);
        devm_kfree(&pdev->dev, pf->vsi);
err_init_pf_unroll:
        ice_deinit_pf(pf);
        ice_deinit_hw(hw);
err_exit_unroll:
        pci_disable_pcie_error_reporting(pdev);
        return err;
}

/**
 * ice_remove - Device removal routine
 * @pdev: PCI device information struct
 */
static void ice_remove(struct pci_dev *pdev)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);
        int i;

        if (!pf)
                return;

        for (i = 0; i < ICE_MAX_RESET_WAIT; i++) {
                if (!ice_is_reset_in_progress(pf->state))
                        break;
                msleep(100);
        }

        set_bit(__ICE_DOWN, pf->state);
        ice_service_task_stop(pf);

        if (test_bit(ICE_FLAG_SRIOV_ENA, pf->flags))
                ice_free_vfs(pf);
        ice_vsi_release_all(pf);
        ice_free_irq_msix_misc(pf);
        ice_for_each_vsi(pf, i) {
                if (!pf->vsi[i])
                        continue;
                ice_vsi_free_q_vectors(pf->vsi[i]);
        }
        ice_clear_interrupt_scheme(pf);
        ice_deinit_pf(pf);
        ice_deinit_hw(&pf->hw);
        pci_disable_pcie_error_reporting(pdev);
}

/**
 * ice_pci_err_detected - warning that PCI error has been detected
 * @pdev: PCI device information struct
 * @err: the type of PCI error
 *
 * Called to warn that something happened on the PCI bus and the error handling
 * is in progress.  Allows the driver to gracefully prepare/handle PCI errors.
 */
static pci_ers_result_t
ice_pci_err_detected(struct pci_dev *pdev, enum pci_channel_state err)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);

        if (!pf) {
                dev_err(&pdev->dev, "%s: unrecoverable device error %d\n",
                        __func__, err);
                return PCI_ERS_RESULT_DISCONNECT;
        }

        if (!test_bit(__ICE_SUSPENDED, pf->state)) {
                ice_service_task_stop(pf);

                if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state)) {
                        set_bit(__ICE_PFR_REQ, pf->state);
                        ice_prepare_for_reset(pf);
                }
        }

        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * ice_pci_err_slot_reset - a PCI slot reset has just happened
 * @pdev: PCI device information struct
 *
 * Called to determine if the driver can recover from the PCI slot reset by
 * using a register read to determine if the device is recoverable.
 */
static pci_ers_result_t ice_pci_err_slot_reset(struct pci_dev *pdev)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);
        pci_ers_result_t result;
        int err;
        u32 reg;

        err = pci_enable_device_mem(pdev);
        if (err) {
                dev_err(&pdev->dev,
                        "Cannot re-enable PCI device after reset, error %d\n",
                        err);
                result = PCI_ERS_RESULT_DISCONNECT;
        } else {
                pci_set_master(pdev);
                pci_restore_state(pdev);
                pci_save_state(pdev);
                pci_wake_from_d3(pdev, false);

                /* Check for life */
                reg = rd32(&pf->hw, GLGEN_RTRIG);
                if (!reg)
                        result = PCI_ERS_RESULT_RECOVERED;
                else
                        result = PCI_ERS_RESULT_DISCONNECT;
        }

        err = pci_cleanup_aer_uncorrect_error_status(pdev);
        if (err)
                dev_dbg(&pdev->dev,
                        "pci_cleanup_aer_uncorrect_error_status failed, error %d\n",
                        err);
                /* non-fatal, continue */

        return result;
}

/**
 * ice_pci_err_resume - restart operations after PCI error recovery
 * @pdev: PCI device information struct
 *
 * Called to allow the driver to bring things back up after PCI error and/or
 * reset recovery have finished
 */
static void ice_pci_err_resume(struct pci_dev *pdev)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);

        if (!pf) {
                dev_err(&pdev->dev,
                        "%s failed, device is unrecoverable\n", __func__);
                return;
        }

        if (test_bit(__ICE_SUSPENDED, pf->state)) {
                dev_dbg(&pdev->dev, "%s failed to resume normal operations!\n",
                        __func__);
                return;
        }

        ice_do_reset(pf, ICE_RESET_PFR);
        ice_service_task_restart(pf);
        mod_timer(&pf->serv_tmr, round_jiffies(jiffies + pf->serv_tmr_period));
}

#if 0
/**
 * ice_pci_err_reset_prepare - prepare device driver for PCI reset
 * @pdev: PCI device information struct
 */
static void ice_pci_err_reset_prepare(struct pci_dev *pdev)
{
        struct ice_pf *pf = pci_get_drvdata(pdev);

        if (!test_bit(__ICE_SUSPENDED, pf->state)) {
                ice_service_task_stop(pf);

                if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state)) {
                        set_bit(__ICE_PFR_REQ, pf->state);
                        ice_prepare_for_reset(pf);
                }
        }
}

/**
 * ice_pci_err_reset_done - PCI reset done, device driver reset can begin
 * @pdev: PCI device information struct
 */
static void ice_pci_err_reset_done(struct pci_dev *pdev)
{
        ice_pci_err_resume(pdev);
}
#endif

/* ice_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id ice_pci_tbl[] = {
        { PCI_VDEVICE(INTEL, ICE_DEV_ID_E810C_BACKPLANE), 0 },
        { PCI_VDEVICE(INTEL, ICE_DEV_ID_E810C_QSFP), 0 },
        { PCI_VDEVICE(INTEL, ICE_DEV_ID_E810C_SFP), 0 },
        /* required last entry */
        { 0, }
};
MODULE_DEVICE_TABLE(pci, ice_pci_tbl);

static const struct pci_error_handlers ice_pci_err_handler = {
        .error_detected = ice_pci_err_detected,
        .slot_reset = ice_pci_err_slot_reset,
#if 0 /* RHEL-7 doesn't support these calls */
        .reset_prepare = ice_pci_err_reset_prepare,
        .reset_done = ice_pci_err_reset_done,
#endif
        .resume = ice_pci_err_resume
};

static struct pci_driver ice_driver = {
        .name = KBUILD_MODNAME,
        .id_table = ice_pci_tbl,
        .probe = ice_probe,
        .remove = ice_remove,
        .sriov_configure = ice_sriov_configure,
        .err_handler = &ice_pci_err_handler
};

/**
 * ice_module_init - Driver registration routine
 *
 * ice_module_init is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 */
static int __init ice_module_init(void)
{
        int status;

        pr_info("%s - version %s\n", ice_driver_string, ice_drv_ver);
        pr_info("%s\n", ice_copyright);

        ice_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0, KBUILD_MODNAME);
        if (!ice_wq) {
                pr_err("Failed to create workqueue\n");
                return -ENOMEM;
        }

        status = pci_register_driver(&ice_driver);
        if (status) {
                pr_err("failed to register pci driver, err %d\n", status);
                destroy_workqueue(ice_wq);
        }

        return status;
}
module_init(ice_module_init);

/**
 * ice_module_exit - Driver exit cleanup routine
 *
 * ice_module_exit is called just before the driver is removed
 * from memory.
 */
static void __exit ice_module_exit(void)
{
        pci_unregister_driver(&ice_driver);
        destroy_workqueue(ice_wq);
        pr_info("module unloaded\n");
}
module_exit(ice_module_exit);

/**
 * ice_set_mac_address - NDO callback to set mac address
 * @netdev: network interface device structure
 * @pi: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 */
static int ice_set_mac_address(struct net_device *netdev, void *pi)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;
        struct ice_pf *pf = vsi->back;
        struct ice_hw *hw = &pf->hw;
        struct sockaddr *addr = pi;
        enum ice_status status;
        LIST_HEAD(a_mac_list);
        LIST_HEAD(r_mac_list);
        u8 flags = 0;
        int err;
        u8 *mac;

        mac = (u8 *)addr->sa_data;

        if (!is_valid_ether_addr(mac))
                return -EADDRNOTAVAIL;

        if (ether_addr_equal(netdev->dev_addr, mac)) {
                netdev_warn(netdev, "already using mac %pM\n", mac);
                return 0;
        }

        if (test_bit(__ICE_DOWN, pf->state) ||
            ice_is_reset_in_progress(pf->state)) {
                netdev_err(netdev, "can't set mac %pM. device not ready\n",
                           mac);
                return -EBUSY;
        }

        /* When we change the mac address we also have to change the mac address
         * based filter rules that were created previously for the old mac
         * address. So first, we remove the old filter rule using ice_remove_mac
         * and then create a new filter rule using ice_add_mac. Note that for
         * both these operations, we first need to form a "list" of mac
         * addresses (even though in this case, we have only 1 mac address to be
         * added/removed) and this done using ice_add_mac_to_list. Depending on
         * the ensuing operation this "list" of mac addresses is either to be
         * added or removed from the filter.
         */
        err = ice_add_mac_to_list(vsi, &r_mac_list, netdev->dev_addr);
        if (err) {
                err = -EADDRNOTAVAIL;
                goto free_lists;
        }

        status = ice_remove_mac(hw, &r_mac_list);
        if (status) {
                err = -EADDRNOTAVAIL;
                goto free_lists;
        }

        err = ice_add_mac_to_list(vsi, &a_mac_list, mac);
        if (err) {
                err = -EADDRNOTAVAIL;
                goto free_lists;
        }

        status = ice_add_mac(hw, &a_mac_list);
        if (status) {
                err = -EADDRNOTAVAIL;
                goto free_lists;
        }

free_lists:
        /* free list entries */
        ice_free_fltr_list(&pf->pdev->dev, &r_mac_list);
        ice_free_fltr_list(&pf->pdev->dev, &a_mac_list);

        if (err) {
                netdev_err(netdev, "can't set mac %pM. filter update failed\n",
                           mac);
                return err;
        }

        /* change the netdev's mac address */
        memcpy(netdev->dev_addr, mac, netdev->addr_len);
        netdev_dbg(vsi->netdev, "updated mac address to %pM\n",
                   netdev->dev_addr);

        /* write new mac address to the firmware */
        flags = ICE_AQC_MAN_MAC_UPDATE_LAA_WOL;
        status = ice_aq_manage_mac_write(hw, mac, flags, NULL);
        if (status) {
                netdev_err(netdev, "can't set mac %pM. write to firmware failed.\n",
                           mac);
        }
        return 0;
}

/**
 * ice_set_rx_mode - NDO callback to set the netdev filters
 * @netdev: network interface device structure
 */
static void ice_set_rx_mode(struct net_device *netdev)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;

        if (!vsi)
                return;

        /* Set the flags to synchronize filters
         * ndo_set_rx_mode may be triggered even without a change in netdev
         * flags
         */
        set_bit(ICE_VSI_FLAG_UMAC_FLTR_CHANGED, vsi->flags);
        set_bit(ICE_VSI_FLAG_MMAC_FLTR_CHANGED, vsi->flags);
        set_bit(ICE_FLAG_FLTR_SYNC, vsi->back->flags);

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        ice_service_task_schedule(vsi->back);
}

/**
 * ice_fdb_add - add an entry to the hardware database
 * @ndm: the input from the stack
 * @tb: pointer to array of nladdr (unused)
 * @dev: the net device pointer
 * @addr: the MAC address entry being added
 * @vid: VLAN id
 * @flags: instructions from stack about fdb operation
 */
static int ice_fdb_add(struct ndmsg *ndm, struct nlattr __always_unused *tb[],
                       struct net_device *dev, const unsigned char *addr,
                       u16 vid, u16 flags)
{
        int err;

        if (vid) {
                netdev_err(dev, "VLANs aren't supported yet for dev_uc|mc_add()\n");
                return -EINVAL;
        }
        if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
                netdev_err(dev, "FDB only supports static addresses\n");
                return -EINVAL;
        }

        if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
                err = dev_uc_add_excl(dev, addr);
        else if (is_multicast_ether_addr(addr))
                err = dev_mc_add_excl(dev, addr);
        else
                err = -EINVAL;

        /* Only return duplicate errors if NLM_F_EXCL is set */
        if (err == -EEXIST && !(flags & NLM_F_EXCL))
                err = 0;

        return err;
}

/**
 * ice_fdb_del - delete an entry from the hardware database
 * @ndm: the input from the stack
 * @tb: pointer to array of nladdr (unused)
 * @dev: the net device pointer
 * @addr: the MAC address entry being added
 * @vid: VLAN id
 */
static int ice_fdb_del(struct ndmsg *ndm, __always_unused struct nlattr *tb[],
                       struct net_device *dev, const unsigned char *addr,
                       __always_unused u16 vid)
{
        int err;

        if (ndm->ndm_state & NUD_PERMANENT) {
                netdev_err(dev, "FDB only supports static addresses\n");
                return -EINVAL;
        }

        if (is_unicast_ether_addr(addr))
                err = dev_uc_del(dev, addr);
        else if (is_multicast_ether_addr(addr))
                err = dev_mc_del(dev, addr);
        else
                err = -EINVAL;

        return err;
}

/**
 * ice_set_features - set the netdev feature flags
 * @netdev: ptr to the netdev being adjusted
 * @features: the feature set that the stack is suggesting
 */
static int ice_set_features(struct net_device *netdev,
                            netdev_features_t features)
{
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;
        int ret = 0;

        if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
                ret = ice_vsi_manage_rss_lut(vsi, true);
        else if (!(features & NETIF_F_RXHASH) &&
                 netdev->features & NETIF_F_RXHASH)
                ret = ice_vsi_manage_rss_lut(vsi, false);

        if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
            !(netdev->features & NETIF_F_HW_VLAN_CTAG_RX))
                ret = ice_vsi_manage_vlan_stripping(vsi, true);
        else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) &&
                 (netdev->features & NETIF_F_HW_VLAN_CTAG_RX))
                ret = ice_vsi_manage_vlan_stripping(vsi, false);
        else if ((features & NETIF_F_HW_VLAN_CTAG_TX) &&
                 !(netdev->features & NETIF_F_HW_VLAN_CTAG_TX))
                ret = ice_vsi_manage_vlan_insertion(vsi);
        else if (!(features & NETIF_F_HW_VLAN_CTAG_TX) &&
                 (netdev->features & NETIF_F_HW_VLAN_CTAG_TX))
                ret = ice_vsi_manage_vlan_insertion(vsi);

        return ret;
}

/**
 * ice_vsi_vlan_setup - Setup vlan offload properties on a VSI
 * @vsi: VSI to setup vlan properties for
 */
static int ice_vsi_vlan_setup(struct ice_vsi *vsi)
{
        int ret = 0;

        if (vsi->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
                ret = ice_vsi_manage_vlan_stripping(vsi, true);
        if (vsi->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
                ret = ice_vsi_manage_vlan_insertion(vsi);

        return ret;
}

/**
 * ice_vsi_cfg - Setup the VSI
 * @vsi: the VSI being configured
 *
 * Return 0 on success and negative value on error
 */
static int ice_vsi_cfg(struct ice_vsi *vsi)
{
        int err;

        if (vsi->netdev) {
                ice_set_rx_mode(vsi->netdev);

                err = ice_vsi_vlan_setup(vsi);

                if (err)
                        return err;
        }

        err = ice_vsi_cfg_lan_txqs(vsi);
        if (!err)
                err = ice_vsi_cfg_rxqs(vsi);

        return err;
}

/**
 * ice_napi_enable_all - Enable NAPI for all q_vectors in the VSI
 * @vsi: the VSI being configured
 */
static void ice_napi_enable_all(struct ice_vsi *vsi)
{
        int q_idx;

        if (!vsi->netdev)
                return;

        for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++) {
                struct ice_q_vector *q_vector = vsi->q_vectors[q_idx];

                if (q_vector->rx.ring || q_vector->tx.ring)
                        napi_enable(&q_vector->napi);
        }
}

/**
 * ice_up_complete - Finish the last steps of bringing up a connection
 * @vsi: The VSI being configured
 *
 * Return 0 on success and negative value on error
 */
static int ice_up_complete(struct ice_vsi *vsi)
{
        struct ice_pf *pf = vsi->back;
        int err;

        if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags))
                ice_vsi_cfg_msix(vsi);
        else
                return -ENOTSUPP;

        /* Enable only Rx rings, Tx rings were enabled by the FW when the
         * Tx queue group list was configured and the context bits were
         * programmed using ice_vsi_cfg_txqs
         */
        err = ice_vsi_start_rx_rings(vsi);
        if (err)
                return err;

        clear_bit(__ICE_DOWN, vsi->state);
        ice_napi_enable_all(vsi);
        ice_vsi_ena_irq(vsi);

        if (vsi->port_info &&
            (vsi->port_info->phy.link_info.link_info & ICE_AQ_LINK_UP) &&
            vsi->netdev) {
                ice_print_link_msg(vsi, true);
                netif_tx_start_all_queues(vsi->netdev);
                netif_carrier_on(vsi->netdev);
        }

        ice_service_task_schedule(pf);

        return err;
}

/**
 * ice_up - Bring the connection back up after being down
 * @vsi: VSI being configured
 */
int ice_up(struct ice_vsi *vsi)
{
        int err;

        err = ice_vsi_cfg(vsi);
        if (!err)
                err = ice_up_complete(vsi);

        return err;
}

/**
 * ice_fetch_u64_stats_per_ring - get packets and bytes stats per ring
 * @ring: Tx or Rx ring to read stats from
 * @pkts: packets stats counter
 * @bytes: bytes stats counter
 *
 * This function fetches stats from the ring considering the atomic operations
 * that needs to be performed to read u64 values in 32 bit machine.
 */
static void ice_fetch_u64_stats_per_ring(struct ice_ring *ring, u64 *pkts,
                                         u64 *bytes)
{
        unsigned int start;
        *pkts = 0;
        *bytes = 0;

        if (!ring)
                return;
        do {
                start = u64_stats_fetch_begin_irq(&ring->syncp);
                *pkts = ring->stats.pkts;
                *bytes = ring->stats.bytes;
        } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
}

/**
 * ice_update_vsi_ring_stats - Update VSI stats counters
 * @vsi: the VSI to be updated
 */
static void ice_update_vsi_ring_stats(struct ice_vsi *vsi)
{
        struct rtnl_link_stats64 *vsi_stats = &vsi->net_stats;
        struct ice_ring *ring;
        u64 pkts, bytes;
        int i;

        /* reset netdev stats */
        vsi_stats->tx_packets = 0;
        vsi_stats->tx_bytes = 0;
        vsi_stats->rx_packets = 0;
        vsi_stats->rx_bytes = 0;

        /* reset non-netdev (extended) stats */
        vsi->tx_restart = 0;
        vsi->tx_busy = 0;
        vsi->tx_linearize = 0;
        vsi->rx_buf_failed = 0;
        vsi->rx_page_failed = 0;

        rcu_read_lock();

        /* update Tx rings counters */
        ice_for_each_txq(vsi, i) {
                ring = READ_ONCE(vsi->tx_rings[i]);
                ice_fetch_u64_stats_per_ring(ring, &pkts, &bytes);
                vsi_stats->tx_packets += pkts;
                vsi_stats->tx_bytes += bytes;
                vsi->tx_restart += ring->tx_stats.restart_q;
                vsi->tx_busy += ring->tx_stats.tx_busy;
                vsi->tx_linearize += ring->tx_stats.tx_linearize;
        }

        /* update Rx rings counters */
        ice_for_each_rxq(vsi, i) {
                ring = READ_ONCE(vsi->rx_rings[i]);
                ice_fetch_u64_stats_per_ring(ring, &pkts, &bytes);
                vsi_stats->rx_packets += pkts;
                vsi_stats->rx_bytes += bytes;
                vsi->rx_buf_failed += ring->rx_stats.alloc_buf_failed;
                vsi->rx_page_failed += ring->rx_stats.alloc_page_failed;
        }

        rcu_read_unlock();
}

/**
 * ice_update_vsi_stats - Update VSI stats counters
 * @vsi: the VSI to be updated
 */
static void ice_update_vsi_stats(struct ice_vsi *vsi)
{
        struct rtnl_link_stats64 *cur_ns = &vsi->net_stats;
        struct ice_eth_stats *cur_es = &vsi->eth_stats;
        struct ice_pf *pf = vsi->back;

        if (test_bit(__ICE_DOWN, vsi->state) ||
            test_bit(__ICE_CFG_BUSY, pf->state))
                return;

        /* get stats as recorded by Tx/Rx rings */
        ice_update_vsi_ring_stats(vsi);

        /* get VSI stats as recorded by the hardware */
        ice_update_eth_stats(vsi);

        cur_ns->tx_errors = cur_es->tx_errors;
        cur_ns->rx_dropped = cur_es->rx_discards;
        cur_ns->tx_dropped = cur_es->tx_discards;
        cur_ns->multicast = cur_es->rx_multicast;

        /* update some more netdev stats if this is main VSI */
        if (vsi->type == ICE_VSI_PF) {
                cur_ns->rx_crc_errors = pf->stats.crc_errors;
                cur_ns->rx_errors = pf->stats.crc_errors +
                                    pf->stats.illegal_bytes;
                cur_ns->rx_length_errors = pf->stats.rx_len_errors;
        }
}

/**
 * ice_update_pf_stats - Update PF port stats counters
 * @pf: PF whose stats needs to be updated
 */
static void ice_update_pf_stats(struct ice_pf *pf)
{
        struct ice_hw_port_stats *prev_ps, *cur_ps;
        struct ice_hw *hw = &pf->hw;
        u8 pf_id;

        prev_ps = &pf->stats_prev;
        cur_ps = &pf->stats;
        pf_id = hw->pf_id;

        ice_stat_update40(hw, GLPRT_GORCH(pf_id), GLPRT_GORCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.rx_bytes,
                          &cur_ps->eth.rx_bytes);

        ice_stat_update40(hw, GLPRT_UPRCH(pf_id), GLPRT_UPRCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.rx_unicast,
                          &cur_ps->eth.rx_unicast);

        ice_stat_update40(hw, GLPRT_MPRCH(pf_id), GLPRT_MPRCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.rx_multicast,
                          &cur_ps->eth.rx_multicast);

        ice_stat_update40(hw, GLPRT_BPRCH(pf_id), GLPRT_BPRCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.rx_broadcast,
                          &cur_ps->eth.rx_broadcast);

        ice_stat_update40(hw, GLPRT_GOTCH(pf_id), GLPRT_GOTCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.tx_bytes,
                          &cur_ps->eth.tx_bytes);

        ice_stat_update40(hw, GLPRT_UPTCH(pf_id), GLPRT_UPTCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.tx_unicast,
                          &cur_ps->eth.tx_unicast);

        ice_stat_update40(hw, GLPRT_MPTCH(pf_id), GLPRT_MPTCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.tx_multicast,
                          &cur_ps->eth.tx_multicast);

        ice_stat_update40(hw, GLPRT_BPTCH(pf_id), GLPRT_BPTCL(pf_id),
                          pf->stat_prev_loaded, &prev_ps->eth.tx_broadcast,
                          &cur_ps->eth.tx_broadcast);

        ice_stat_update32(hw, GLPRT_TDOLD(pf_id), pf->stat_prev_loaded,
                          &prev_ps->tx_dropped_link_down,
                          &cur_ps->tx_dropped_link_down);

        ice_stat_update40(hw, GLPRT_PRC64H(pf_id), GLPRT_PRC64L(pf_id),
                          pf->stat_prev_loaded, &prev_ps->rx_size_64,