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[mirror_ubuntu-jammy-kernel.git] / drivers / net / ethernet / cavium / liquidio / lio_main.c

/**********************************************************************
 * Author: Cavium, Inc.
 *
 * Contact: support@cavium.com
 *          Please include "LiquidIO" in the subject.
 *
 * Copyright (c) 2003-2016 Cavium, Inc.
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more details.
 ***********************************************************************/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <net/vxlan.h>
#include <linux/kthread.h>
#include <net/switchdev.h>
#include "liquidio_common.h"
#include "octeon_droq.h"
#include "octeon_iq.h"
#include "response_manager.h"
#include "octeon_device.h"
#include "octeon_nic.h"
#include "octeon_main.h"
#include "octeon_network.h"
#include "cn66xx_regs.h"
#include "cn66xx_device.h"
#include "cn68xx_device.h"
#include "cn23xx_pf_device.h"
#include "liquidio_image.h"
#include "lio_vf_rep.h"

MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(LIQUIDIO_VERSION);
MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210SV_NAME
                "_" LIO_FW_NAME_TYPE_NIC LIO_FW_NAME_SUFFIX);
MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210NV_NAME
                "_" LIO_FW_NAME_TYPE_NIC LIO_FW_NAME_SUFFIX);
MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_410NV_NAME
                "_" LIO_FW_NAME_TYPE_NIC LIO_FW_NAME_SUFFIX);
MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_23XX_NAME
                "_" LIO_FW_NAME_TYPE_NIC LIO_FW_NAME_SUFFIX);

static int ddr_timeout = 10000;
module_param(ddr_timeout, int, 0644);
MODULE_PARM_DESC(ddr_timeout,
                 "Number of milliseconds to wait for DDR initialization. 0 waits for ddr_timeout to be set to non-zero value before starting to check");

#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)

static int debug = -1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");

static char fw_type[LIO_MAX_FW_TYPE_LEN] = LIO_FW_NAME_TYPE_AUTO;
module_param_string(fw_type, fw_type, sizeof(fw_type), 0444);
MODULE_PARM_DESC(fw_type, "Type of firmware to be loaded (default is \"auto\"), which uses firmware in flash, if present, else loads \"nic\".");

static u32 console_bitmask;
module_param(console_bitmask, int, 0644);
MODULE_PARM_DESC(console_bitmask,
                 "Bitmask indicating which consoles have debug output redirected to syslog.");

/**
 * \brief determines if a given console has debug enabled.
 * @param console console to check
 * @returns  1 = enabled. 0 otherwise
 */
static int octeon_console_debug_enabled(u32 console)
{
        return (console_bitmask >> (console)) & 0x1;
}

/* Polling interval for determining when NIC application is alive */
#define LIQUIDIO_STARTER_POLL_INTERVAL_MS 100

/* runtime link query interval */
#define LIQUIDIO_LINK_QUERY_INTERVAL_MS         1000
/* update localtime to octeon firmware every 60 seconds.
 * make firmware to use same time reference, so that it will be easy to
 * correlate firmware logged events/errors with host events, for debugging.
 */
#define LIO_SYNC_OCTEON_TIME_INTERVAL_MS 60000

struct liquidio_if_cfg_context {
        int octeon_id;

        wait_queue_head_t wc;

        int cond;
};

struct liquidio_if_cfg_resp {
        u64 rh;
        struct liquidio_if_cfg_info cfg_info;
        u64 status;
};

struct liquidio_rx_ctl_context {
        int octeon_id;

        wait_queue_head_t wc;

        int cond;
};

struct oct_link_status_resp {
        u64 rh;
        struct oct_link_info link_info;
        u64 status;
};

struct oct_timestamp_resp {
        u64 rh;
        u64 timestamp;
        u64 status;
};

#define OCT_TIMESTAMP_RESP_SIZE (sizeof(struct oct_timestamp_resp))

union tx_info {
        u64 u64;
        struct {
#ifdef __BIG_ENDIAN_BITFIELD
                u16 gso_size;
                u16 gso_segs;
                u32 reserved;
#else
                u32 reserved;
                u16 gso_segs;
                u16 gso_size;
#endif
        } s;
};

/** Octeon device properties to be used by the NIC module.
 * Each octeon device in the system will be represented
 * by this structure in the NIC module.
 */

#define OCTNIC_MAX_SG  (MAX_SKB_FRAGS)

#define OCTNIC_GSO_MAX_HEADER_SIZE 128
#define OCTNIC_GSO_MAX_SIZE                                                    \
        (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)

/** Structure of a node in list of gather components maintained by
 * NIC driver for each network device.
 */
struct octnic_gather {
        /** List manipulation. Next and prev pointers. */
        struct list_head list;

        /** Size of the gather component at sg in bytes. */
        int sg_size;

        /** Number of bytes that sg was adjusted to make it 8B-aligned. */
        int adjust;

        /** Gather component that can accommodate max sized fragment list
         *  received from the IP layer.
         */
        struct octeon_sg_entry *sg;

        dma_addr_t sg_dma_ptr;
};

struct handshake {
        struct completion init;
        struct completion started;
        struct pci_dev *pci_dev;
        int init_ok;
        int started_ok;
};

#ifdef CONFIG_PCI_IOV
static int liquidio_enable_sriov(struct pci_dev *dev, int num_vfs);
#endif

static int octeon_dbg_console_print(struct octeon_device *oct, u32 console_num,
                                    char *prefix, char *suffix);

static int octeon_device_init(struct octeon_device *);
static int liquidio_stop(struct net_device *netdev);
static void liquidio_remove(struct pci_dev *pdev);
static int liquidio_probe(struct pci_dev *pdev,
                          const struct pci_device_id *ent);
static int liquidio_set_vf_link_state(struct net_device *netdev, int vfidx,
                                      int linkstate);

static struct handshake handshake[MAX_OCTEON_DEVICES];
static struct completion first_stage;

static void octeon_droq_bh(unsigned long pdev)
{
        int q_no;
        int reschedule = 0;
        struct octeon_device *oct = (struct octeon_device *)pdev;
        struct octeon_device_priv *oct_priv =
                (struct octeon_device_priv *)oct->priv;

        for (q_no = 0; q_no < MAX_OCTEON_OUTPUT_QUEUES(oct); q_no++) {
                if (!(oct->io_qmask.oq & BIT_ULL(q_no)))
                        continue;
                reschedule |= octeon_droq_process_packets(oct, oct->droq[q_no],
                                                          MAX_PACKET_BUDGET);
                lio_enable_irq(oct->droq[q_no], NULL);

                if (OCTEON_CN23XX_PF(oct) && oct->msix_on) {
                        /* set time and cnt interrupt thresholds for this DROQ
                         * for NAPI
                         */
                        int adjusted_q_no = q_no + oct->sriov_info.pf_srn;

                        octeon_write_csr64(
                            oct, CN23XX_SLI_OQ_PKT_INT_LEVELS(adjusted_q_no),
                            0x5700000040ULL);
                        octeon_write_csr64(
                            oct, CN23XX_SLI_OQ_PKTS_SENT(adjusted_q_no), 0);
                }
        }

        if (reschedule)
                tasklet_schedule(&oct_priv->droq_tasklet);
}

static int lio_wait_for_oq_pkts(struct octeon_device *oct)
{
        struct octeon_device_priv *oct_priv =
                (struct octeon_device_priv *)oct->priv;
        int retry = 100, pkt_cnt = 0, pending_pkts = 0;
        int i;

        do {
                pending_pkts = 0;

                for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
                        if (!(oct->io_qmask.oq & BIT_ULL(i)))
                                continue;
                        pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
                }
                if (pkt_cnt > 0) {
                        pending_pkts += pkt_cnt;
                        tasklet_schedule(&oct_priv->droq_tasklet);
                }
                pkt_cnt = 0;
                schedule_timeout_uninterruptible(1);

        } while (retry-- && pending_pkts);

        return pkt_cnt;
}

/**
 * \brief Forces all IO queues off on a given device
 * @param oct Pointer to Octeon device
 */
static void force_io_queues_off(struct octeon_device *oct)
{
        if ((oct->chip_id == OCTEON_CN66XX) ||
            (oct->chip_id == OCTEON_CN68XX)) {
                /* Reset the Enable bits for Input Queues. */
                octeon_write_csr(oct, CN6XXX_SLI_PKT_INSTR_ENB, 0);

                /* Reset the Enable bits for Output Queues. */
                octeon_write_csr(oct, CN6XXX_SLI_PKT_OUT_ENB, 0);
        }
}

/**
 * \brief Cause device to go quiet so it can be safely removed/reset/etc
 * @param oct Pointer to Octeon device
 */
static inline void pcierror_quiesce_device(struct octeon_device *oct)
{
        int i;

        /* Disable the input and output queues now. No more packets will
         * arrive from Octeon, but we should wait for all packet processing
         * to finish.
         */
        force_io_queues_off(oct);

        /* To allow for in-flight requests */
        schedule_timeout_uninterruptible(100);

        if (wait_for_pending_requests(oct))
                dev_err(&oct->pci_dev->dev, "There were pending requests\n");

        /* Force all requests waiting to be fetched by OCTEON to complete. */
        for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
                struct octeon_instr_queue *iq;

                if (!(oct->io_qmask.iq & BIT_ULL(i)))
                        continue;
                iq = oct->instr_queue[i];

                if (atomic_read(&iq->instr_pending)) {
                        spin_lock_bh(&iq->lock);
                        iq->fill_cnt = 0;
                        iq->octeon_read_index = iq->host_write_index;
                        iq->stats.instr_processed +=
                                atomic_read(&iq->instr_pending);
                        lio_process_iq_request_list(oct, iq, 0);
                        spin_unlock_bh(&iq->lock);
                }
        }

        /* Force all pending ordered list requests to time out. */
        lio_process_ordered_list(oct, 1);

        /* We do not need to wait for output queue packets to be processed. */
}

/**
 * \brief Cleanup PCI AER uncorrectable error status
 * @param dev Pointer to PCI device
 */
static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
        int pos = 0x100;
        u32 status, mask;

        pr_info("%s :\n", __func__);

        pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
        pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
        if (dev->error_state == pci_channel_io_normal)
                status &= ~mask;        /* Clear corresponding nonfatal bits */
        else
                status &= mask;         /* Clear corresponding fatal bits */
        pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
}

/**
 * \brief Stop all PCI IO to a given device
 * @param dev Pointer to Octeon device
 */
static void stop_pci_io(struct octeon_device *oct)
{
        /* No more instructions will be forwarded. */
        atomic_set(&oct->status, OCT_DEV_IN_RESET);

        pci_disable_device(oct->pci_dev);

        /* Disable interrupts  */
        oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);

        pcierror_quiesce_device(oct);

        /* Release the interrupt line */
        free_irq(oct->pci_dev->irq, oct);

        if (oct->flags & LIO_FLAG_MSI_ENABLED)
                pci_disable_msi(oct->pci_dev);

        dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
                lio_get_state_string(&oct->status));

        /* making it a common function for all OCTEON models */
        cleanup_aer_uncorrect_error_status(oct->pci_dev);
}

/**
 * \brief called when PCI error is detected
 * @param pdev Pointer to PCI device
 * @param state The current pci connection state
 *
 * This function is called after a PCI bus error affecting
 * this device has been detected.
 */
static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
                                                     pci_channel_state_t state)
{
        struct octeon_device *oct = pci_get_drvdata(pdev);

        /* Non-correctable Non-fatal errors */
        if (state == pci_channel_io_normal) {
                dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
                cleanup_aer_uncorrect_error_status(oct->pci_dev);
                return PCI_ERS_RESULT_CAN_RECOVER;
        }

        /* Non-correctable Fatal errors */
        dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
        stop_pci_io(oct);

        /* Always return a DISCONNECT. There is no support for recovery but only
         * for a clean shutdown.
         */
        return PCI_ERS_RESULT_DISCONNECT;
}

/**
 * \brief mmio handler
 * @param pdev Pointer to PCI device
 */
static pci_ers_result_t liquidio_pcie_mmio_enabled(
                                struct pci_dev *pdev __attribute__((unused)))
{
        /* We should never hit this since we never ask for a reset for a Fatal
         * Error. We always return DISCONNECT in io_error above.
         * But play safe and return RECOVERED for now.
         */
        return PCI_ERS_RESULT_RECOVERED;
}

/**
 * \brief called after the pci bus has been reset.
 * @param pdev Pointer to PCI device
 *
 * Restart the card from scratch, as if from a cold-boot. Implementation
 * resembles the first-half of the octeon_resume routine.
 */
static pci_ers_result_t liquidio_pcie_slot_reset(
                                struct pci_dev *pdev __attribute__((unused)))
{
        /* We should never hit this since we never ask for a reset for a Fatal
         * Error. We always return DISCONNECT in io_error above.
         * But play safe and return RECOVERED for now.
         */
        return PCI_ERS_RESULT_RECOVERED;
}

/**
 * \brief called when traffic can start flowing again.
 * @param pdev Pointer to PCI device
 *
 * This callback is called when the error recovery driver tells us that
 * its OK to resume normal operation. Implementation resembles the
 * second-half of the octeon_resume routine.
 */
static void liquidio_pcie_resume(struct pci_dev *pdev __attribute__((unused)))
{
        /* Nothing to be done here. */
}

#ifdef CONFIG_PM
/**
 * \brief called when suspending
 * @param pdev Pointer to PCI device
 * @param state state to suspend to
 */
static int liquidio_suspend(struct pci_dev *pdev __attribute__((unused)),
                            pm_message_t state __attribute__((unused)))
{
        return 0;
}

/**
 * \brief called when resuming
 * @param pdev Pointer to PCI device
 */
static int liquidio_resume(struct pci_dev *pdev __attribute__((unused)))
{
        return 0;
}
#endif

/* For PCI-E Advanced Error Recovery (AER) Interface */
static const struct pci_error_handlers liquidio_err_handler = {
        .error_detected = liquidio_pcie_error_detected,
        .mmio_enabled   = liquidio_pcie_mmio_enabled,
        .slot_reset     = liquidio_pcie_slot_reset,
        .resume         = liquidio_pcie_resume,
};

static const struct pci_device_id liquidio_pci_tbl[] = {
        {       /* 68xx */
                PCI_VENDOR_ID_CAVIUM, 0x91, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
        },
        {       /* 66xx */
                PCI_VENDOR_ID_CAVIUM, 0x92, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
        },
        {       /* 23xx pf */
                PCI_VENDOR_ID_CAVIUM, 0x9702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
        },
        {
                0, 0, 0, 0, 0, 0, 0
        }
};
MODULE_DEVICE_TABLE(pci, liquidio_pci_tbl);

static struct pci_driver liquidio_pci_driver = {
        .name           = "LiquidIO",
        .id_table       = liquidio_pci_tbl,
        .probe          = liquidio_probe,
        .remove         = liquidio_remove,
        .err_handler    = &liquidio_err_handler,    /* For AER */

#ifdef CONFIG_PM
        .suspend        = liquidio_suspend,
        .resume         = liquidio_resume,
#endif
#ifdef CONFIG_PCI_IOV
        .sriov_configure = liquidio_enable_sriov,
#endif
};

/**
 * \brief register PCI driver
 */
static int liquidio_init_pci(void)
{
        return pci_register_driver(&liquidio_pci_driver);
}

/**
 * \brief unregister PCI driver
 */
static void liquidio_deinit_pci(void)
{
        pci_unregister_driver(&liquidio_pci_driver);
}

/**
 * \brief Stop Tx queues
 * @param netdev network device
 */
static inline void txqs_stop(struct net_device *netdev)
{
        if (netif_is_multiqueue(netdev)) {
                int i;

                for (i = 0; i < netdev->num_tx_queues; i++)
                        netif_stop_subqueue(netdev, i);
        } else {
                netif_stop_queue(netdev);
        }
}

/**
 * \brief Start Tx queues
 * @param netdev network device
 */
static inline void txqs_start(struct net_device *netdev)
{
        if (netif_is_multiqueue(netdev)) {
                int i;

                for (i = 0; i < netdev->num_tx_queues; i++)
                        netif_start_subqueue(netdev, i);
        } else {
                netif_start_queue(netdev);
        }
}

/**
 * \brief Wake Tx queues
 * @param netdev network device
 */
static inline void txqs_wake(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);

        if (netif_is_multiqueue(netdev)) {
                int i;

                for (i = 0; i < netdev->num_tx_queues; i++) {
                        int qno = lio->linfo.txpciq[i %
                                lio->oct_dev->num_iqs].s.q_no;

                        if (__netif_subqueue_stopped(netdev, i)) {
                                INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
                                                          tx_restart, 1);
                                netif_wake_subqueue(netdev, i);
                        }
                }
        } else {
                INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
                                          tx_restart, 1);
                netif_wake_queue(netdev);
        }
}

/**
 * \brief Stop Tx queue
 * @param netdev network device
 */
static void stop_txq(struct net_device *netdev)
{
        txqs_stop(netdev);
}

/**
 * \brief Start Tx queue
 * @param netdev network device
 */
static void start_txq(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);

        if (lio->linfo.link.s.link_up) {
                txqs_start(netdev);
                return;
        }
}

/**
 * \brief Wake a queue
 * @param netdev network device
 * @param q which queue to wake
 */
static inline void wake_q(struct net_device *netdev, int q)
{
        if (netif_is_multiqueue(netdev))
                netif_wake_subqueue(netdev, q);
        else
                netif_wake_queue(netdev);
}

/**
 * \brief Stop a queue
 * @param netdev network device
 * @param q which queue to stop
 */
static inline void stop_q(struct net_device *netdev, int q)
{
        if (netif_is_multiqueue(netdev))
                netif_stop_subqueue(netdev, q);
        else
                netif_stop_queue(netdev);
}

/**
 * \brief Check Tx queue status, and take appropriate action
 * @param lio per-network private data
 * @returns 0 if full, number of queues woken up otherwise
 */
static inline int check_txq_status(struct lio *lio)
{
        int ret_val = 0;

        if (netif_is_multiqueue(lio->netdev)) {
                int numqs = lio->netdev->num_tx_queues;
                int q, iq = 0;

                /* check each sub-queue state */
                for (q = 0; q < numqs; q++) {
                        iq = lio->linfo.txpciq[q %
                                lio->oct_dev->num_iqs].s.q_no;
                        if (octnet_iq_is_full(lio->oct_dev, iq))
                                continue;
                        if (__netif_subqueue_stopped(lio->netdev, q)) {
                                wake_q(lio->netdev, q);
                                INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq,
                                                          tx_restart, 1);
                                ret_val++;
                        }
                }
        } else {
                if (octnet_iq_is_full(lio->oct_dev, lio->txq))
                        return 0;
                wake_q(lio->netdev, lio->txq);
                INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
                                          tx_restart, 1);
                ret_val = 1;
        }
        return ret_val;
}

/**
 * Remove the node at the head of the list. The list would be empty at
 * the end of this call if there are no more nodes in the list.
 */
static inline struct list_head *list_delete_head(struct list_head *root)
{
        struct list_head *node;

        if ((root->prev == root) && (root->next == root))
                node = NULL;
        else
                node = root->next;

        if (node)
                list_del(node);

        return node;
}

/**
 * \brief Delete gather lists
 * @param lio per-network private data
 */
static void delete_glists(struct lio *lio)
{
        struct octnic_gather *g;
        int i;

        kfree(lio->glist_lock);
        lio->glist_lock = NULL;

        if (!lio->glist)
                return;

        for (i = 0; i < lio->linfo.num_txpciq; i++) {
                do {
                        g = (struct octnic_gather *)
                                list_delete_head(&lio->glist[i]);
                        if (g)
                                kfree(g);
                } while (g);

                if (lio->glists_virt_base && lio->glists_virt_base[i] &&
                    lio->glists_dma_base && lio->glists_dma_base[i]) {
                        lio_dma_free(lio->oct_dev,
                                     lio->glist_entry_size * lio->tx_qsize,
                                     lio->glists_virt_base[i],
                                     lio->glists_dma_base[i]);
                }
        }

        kfree(lio->glists_virt_base);
        lio->glists_virt_base = NULL;

        kfree(lio->glists_dma_base);
        lio->glists_dma_base = NULL;

        kfree(lio->glist);
        lio->glist = NULL;
}

/**
 * \brief Setup gather lists
 * @param lio per-network private data
 */
static int setup_glists(struct octeon_device *oct, struct lio *lio, int num_iqs)
{
        int i, j;
        struct octnic_gather *g;

        lio->glist_lock = kcalloc(num_iqs, sizeof(*lio->glist_lock),
                                  GFP_KERNEL);
        if (!lio->glist_lock)
                return -ENOMEM;

        lio->glist = kcalloc(num_iqs, sizeof(*lio->glist),
                             GFP_KERNEL);
        if (!lio->glist) {
                kfree(lio->glist_lock);
                lio->glist_lock = NULL;
                return -ENOMEM;
        }

        lio->glist_entry_size =
                ROUNDUP8((ROUNDUP4(OCTNIC_MAX_SG) >> 2) * OCT_SG_ENTRY_SIZE);

        /* allocate memory to store virtual and dma base address of
         * per glist consistent memory
         */
        lio->glists_virt_base = kcalloc(num_iqs, sizeof(*lio->glists_virt_base),
                                        GFP_KERNEL);
        lio->glists_dma_base = kcalloc(num_iqs, sizeof(*lio->glists_dma_base),
                                       GFP_KERNEL);

        if (!lio->glists_virt_base || !lio->glists_dma_base) {
                delete_glists(lio);
                return -ENOMEM;
        }

        for (i = 0; i < num_iqs; i++) {
                int numa_node = dev_to_node(&oct->pci_dev->dev);

                spin_lock_init(&lio->glist_lock[i]);

                INIT_LIST_HEAD(&lio->glist[i]);

                lio->glists_virt_base[i] =
                        lio_dma_alloc(oct,
                                      lio->glist_entry_size * lio->tx_qsize,
                                      &lio->glists_dma_base[i]);

                if (!lio->glists_virt_base[i]) {
                        delete_glists(lio);
                        return -ENOMEM;
                }

                for (j = 0; j < lio->tx_qsize; j++) {
                        g = kzalloc_node(sizeof(*g), GFP_KERNEL,
                                         numa_node);
                        if (!g)
                                g = kzalloc(sizeof(*g), GFP_KERNEL);
                        if (!g)
                                break;

                        g->sg = lio->glists_virt_base[i] +
                                (j * lio->glist_entry_size);

                        g->sg_dma_ptr = lio->glists_dma_base[i] +
                                        (j * lio->glist_entry_size);

                        list_add_tail(&g->list, &lio->glist[i]);
                }

                if (j != lio->tx_qsize) {
                        delete_glists(lio);
                        return -ENOMEM;
                }
        }

        return 0;
}

/**
 * \brief Print link information
 * @param netdev network device
 */
static void print_link_info(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);

        if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
            ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
                struct oct_link_info *linfo = &lio->linfo;

                if (linfo->link.s.link_up) {
                        netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
                                   linfo->link.s.speed,
                                   (linfo->link.s.duplex) ? "Full" : "Half");
                } else {
                        netif_info(lio, link, lio->netdev, "Link Down\n");
                }
        }
}

/**
 * \brief Routine to notify MTU change
 * @param work work_struct data structure
 */
static void octnet_link_status_change(struct work_struct *work)
{
        struct cavium_wk *wk = (struct cavium_wk *)work;
        struct lio *lio = (struct lio *)wk->ctxptr;

        rtnl_lock();
        call_netdevice_notifiers(NETDEV_CHANGEMTU, lio->netdev);
        rtnl_unlock();
}

/**
 * \brief Sets up the mtu status change work
 * @param netdev network device
 */
static inline int setup_link_status_change_wq(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;

        lio->link_status_wq.wq = alloc_workqueue("link-status",
                                                 WQ_MEM_RECLAIM, 0);
        if (!lio->link_status_wq.wq) {
                dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
                return -1;
        }
        INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
                          octnet_link_status_change);
        lio->link_status_wq.wk.ctxptr = lio;

        return 0;
}

static inline void cleanup_link_status_change_wq(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);

        if (lio->link_status_wq.wq) {
                cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
                destroy_workqueue(lio->link_status_wq.wq);
        }
}

/**
 * \brief Update link status
 * @param netdev network device
 * @param ls link status structure
 *
 * Called on receipt of a link status response from the core application to
 * update each interface's link status.
 */
static inline void update_link_status(struct net_device *netdev,
                                      union oct_link_status *ls)
{
        struct lio *lio = GET_LIO(netdev);
        int changed = (lio->linfo.link.u64 != ls->u64);

        lio->linfo.link.u64 = ls->u64;

        if ((lio->intf_open) && (changed)) {
                print_link_info(netdev);
                lio->link_changes++;

                if (lio->linfo.link.s.link_up) {
                        netif_carrier_on(netdev);
                        txqs_wake(netdev);
                } else {
                        netif_carrier_off(netdev);
                        stop_txq(netdev);
                }
        }
}

/**
 * lio_sync_octeon_time_cb - callback that is invoked when soft command
 * sent by lio_sync_octeon_time() has completed successfully or failed
 *
 * @oct - octeon device structure
 * @status - indicates success or failure
 * @buf - pointer to the command that was sent to firmware
 **/
static void lio_sync_octeon_time_cb(struct octeon_device *oct,
                                    u32 status, void *buf)
{
        struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;

        if (status)
                dev_err(&oct->pci_dev->dev,
                        "Failed to sync time to octeon; error=%d\n", status);

        octeon_free_soft_command(oct, sc);
}

/**
 * lio_sync_octeon_time - send latest localtime to octeon firmware so that
 * firmware will correct it's time, in case there is a time skew
 *
 * @work: work scheduled to send time update to octeon firmware
 **/
static void lio_sync_octeon_time(struct work_struct *work)
{
        struct cavium_wk *wk = (struct cavium_wk *)work;
        struct lio *lio = (struct lio *)wk->ctxptr;
        struct octeon_device *oct = lio->oct_dev;
        struct octeon_soft_command *sc;
        struct timespec64 ts;
        struct lio_time *lt;
        int ret;

        sc = octeon_alloc_soft_command(oct, sizeof(struct lio_time), 0, 0);
        if (!sc) {
                dev_err(&oct->pci_dev->dev,
                        "Failed to sync time to octeon: soft command allocation failed\n");
                return;
        }

        lt = (struct lio_time *)sc->virtdptr;

        /* Get time of the day */
        getnstimeofday64(&ts);
        lt->sec = ts.tv_sec;
        lt->nsec = ts.tv_nsec;
        octeon_swap_8B_data((u64 *)lt, (sizeof(struct lio_time)) / 8);

        sc->iq_no = lio->linfo.txpciq[0].s.q_no;
        octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
                                    OPCODE_NIC_SYNC_OCTEON_TIME, 0, 0, 0);

        sc->callback = lio_sync_octeon_time_cb;
        sc->callback_arg = sc;
        sc->wait_time = 1000;

        ret = octeon_send_soft_command(oct, sc);
        if (ret == IQ_SEND_FAILED) {
                dev_err(&oct->pci_dev->dev,
                        "Failed to sync time to octeon: failed to send soft command\n");
                octeon_free_soft_command(oct, sc);
        }

        queue_delayed_work(lio->sync_octeon_time_wq.wq,
                           &lio->sync_octeon_time_wq.wk.work,
                           msecs_to_jiffies(LIO_SYNC_OCTEON_TIME_INTERVAL_MS));
}

/**
 * setup_sync_octeon_time_wq - Sets up the work to periodically update
 * local time to octeon firmware
 *
 * @netdev - network device which should send time update to firmware
 **/
static inline int setup_sync_octeon_time_wq(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;

        lio->sync_octeon_time_wq.wq =
                alloc_workqueue("update-octeon-time", WQ_MEM_RECLAIM, 0);
        if (!lio->sync_octeon_time_wq.wq) {
                dev_err(&oct->pci_dev->dev, "Unable to create wq to update octeon time\n");
                return -1;
        }
        INIT_DELAYED_WORK(&lio->sync_octeon_time_wq.wk.work,
                          lio_sync_octeon_time);
        lio->sync_octeon_time_wq.wk.ctxptr = lio;
        queue_delayed_work(lio->sync_octeon_time_wq.wq,
                           &lio->sync_octeon_time_wq.wk.work,
                           msecs_to_jiffies(LIO_SYNC_OCTEON_TIME_INTERVAL_MS));

        return 0;
}

/**
 * cleanup_sync_octeon_time_wq - stop scheduling and destroy the work created
 * to periodically update local time to octeon firmware
 *
 * @netdev - network device which should send time update to firmware
 **/
static inline void cleanup_sync_octeon_time_wq(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct cavium_wq *time_wq = &lio->sync_octeon_time_wq;

        if (time_wq->wq) {
                cancel_delayed_work_sync(&time_wq->wk.work);
                destroy_workqueue(time_wq->wq);
        }
}

static struct octeon_device *get_other_octeon_device(struct octeon_device *oct)
{
        struct octeon_device *other_oct;

        other_oct = lio_get_device(oct->octeon_id + 1);

        if (other_oct && other_oct->pci_dev) {
                int oct_busnum, other_oct_busnum;

                oct_busnum = oct->pci_dev->bus->number;
                other_oct_busnum = other_oct->pci_dev->bus->number;

                if (oct_busnum == other_oct_busnum) {
                        int oct_slot, other_oct_slot;

                        oct_slot = PCI_SLOT(oct->pci_dev->devfn);
                        other_oct_slot = PCI_SLOT(other_oct->pci_dev->devfn);

                        if (oct_slot == other_oct_slot)
                                return other_oct;
                }
        }

        return NULL;
}

static void disable_all_vf_links(struct octeon_device *oct)
{
        struct net_device *netdev;
        int max_vfs, vf, i;

        if (!oct)
                return;

        max_vfs = oct->sriov_info.max_vfs;

        for (i = 0; i < oct->ifcount; i++) {
                netdev = oct->props[i].netdev;
                if (!netdev)
                        continue;

                for (vf = 0; vf < max_vfs; vf++)
                        liquidio_set_vf_link_state(netdev, vf,
                                                   IFLA_VF_LINK_STATE_DISABLE);
        }
}

static int liquidio_watchdog(void *param)
{
        bool err_msg_was_printed[LIO_MAX_CORES];
        u16 mask_of_crashed_or_stuck_cores = 0;
        bool all_vf_links_are_disabled = false;
        struct octeon_device *oct = param;
        struct octeon_device *other_oct;
#ifdef CONFIG_MODULE_UNLOAD
        long refcount, vfs_referencing_pf;
        u64 vfs_mask1, vfs_mask2;
#endif
        int core;

        memset(err_msg_was_printed, 0, sizeof(err_msg_was_printed));

        while (!kthread_should_stop()) {
                /* sleep for a couple of seconds so that we don't hog the CPU */
                set_current_state(TASK_INTERRUPTIBLE);
                schedule_timeout(msecs_to_jiffies(2000));

                mask_of_crashed_or_stuck_cores =
                    (u16)octeon_read_csr64(oct, CN23XX_SLI_SCRATCH2);

                if (!mask_of_crashed_or_stuck_cores)
                        continue;

                WRITE_ONCE(oct->cores_crashed, true);
                other_oct = get_other_octeon_device(oct);
                if (other_oct)
                        WRITE_ONCE(other_oct->cores_crashed, true);

                for (core = 0; core < LIO_MAX_CORES; core++) {
                        bool core_crashed_or_got_stuck;

                        core_crashed_or_got_stuck =
                                                (mask_of_crashed_or_stuck_cores
                                                 >> core) & 1;

                        if (core_crashed_or_got_stuck &&
                            !err_msg_was_printed[core]) {
                                dev_err(&oct->pci_dev->dev,
                                        "ERROR: Octeon core %d crashed or got stuck!  See oct-fwdump for details.\n",
                                        core);
                                err_msg_was_printed[core] = true;
                        }
                }

                if (all_vf_links_are_disabled)
                        continue;

                disable_all_vf_links(oct);
                disable_all_vf_links(other_oct);
                all_vf_links_are_disabled = true;

#ifdef CONFIG_MODULE_UNLOAD
                vfs_mask1 = READ_ONCE(oct->sriov_info.vf_drv_loaded_mask);
                vfs_mask2 = READ_ONCE(other_oct->sriov_info.vf_drv_loaded_mask);

                vfs_referencing_pf  = hweight64(vfs_mask1);
                vfs_referencing_pf += hweight64(vfs_mask2);

                refcount = module_refcount(THIS_MODULE);
                if (refcount >= vfs_referencing_pf) {
                        while (vfs_referencing_pf) {
                                module_put(THIS_MODULE);
                                vfs_referencing_pf--;
                        }
                }
#endif
        }

        return 0;
}

/**
 * \brief PCI probe handler
 * @param pdev PCI device structure
 * @param ent unused
 */
static int
liquidio_probe(struct pci_dev *pdev,
               const struct pci_device_id *ent __attribute__((unused)))
{
        struct octeon_device *oct_dev = NULL;
        struct handshake *hs;

        oct_dev = octeon_allocate_device(pdev->device,
                                         sizeof(struct octeon_device_priv));
        if (!oct_dev) {
                dev_err(&pdev->dev, "Unable to allocate device\n");
                return -ENOMEM;
        }

        if (pdev->device == OCTEON_CN23XX_PF_VID)
                oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;

        /* Enable PTP for 6XXX Device */
        if (((pdev->device == OCTEON_CN66XX) ||
             (pdev->device == OCTEON_CN68XX)))
                oct_dev->ptp_enable = true;
        else
                oct_dev->ptp_enable = false;

        dev_info(&pdev->dev, "Initializing device %x:%x.\n",
                 (u32)pdev->vendor, (u32)pdev->device);

        /* Assign octeon_device for this device to the private data area. */
        pci_set_drvdata(pdev, oct_dev);

        /* set linux specific device pointer */
        oct_dev->pci_dev = (void *)pdev;

        hs = &handshake[oct_dev->octeon_id];
        init_completion(&hs->init);
        init_completion(&hs->started);
        hs->pci_dev = pdev;

        if (oct_dev->octeon_id == 0)
                /* first LiquidIO NIC is detected */
                complete(&first_stage);

        if (octeon_device_init(oct_dev)) {
                complete(&hs->init);
                liquidio_remove(pdev);
                return -ENOMEM;
        }

        if (OCTEON_CN23XX_PF(oct_dev)) {
                u8 bus, device, function;

                if (atomic_read(oct_dev->adapter_refcount) == 1) {
                        /* Each NIC gets one watchdog kernel thread.  The first
                         * PF (of each NIC) that gets pci_driver->probe()'d
                         * creates that thread.
                         */
                        bus = pdev->bus->number;
                        device = PCI_SLOT(pdev->devfn);
                        function = PCI_FUNC(pdev->devfn);
                        oct_dev->watchdog_task = kthread_create(
                            liquidio_watchdog, oct_dev,
                            "liowd/%02hhx:%02hhx.%hhx", bus, device, function);
                        if (!IS_ERR(oct_dev->watchdog_task)) {
                                wake_up_process(oct_dev->watchdog_task);
                        } else {
                                oct_dev->watchdog_task = NULL;
                                dev_err(&oct_dev->pci_dev->dev,
                                        "failed to create kernel_thread\n");
                                liquidio_remove(pdev);
                                return -1;
                        }
                }
        }

        oct_dev->rx_pause = 1;
        oct_dev->tx_pause = 1;

        dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");

        return 0;
}

static bool fw_type_is_auto(void)
{
        return strncmp(fw_type, LIO_FW_NAME_TYPE_AUTO,
                       sizeof(LIO_FW_NAME_TYPE_AUTO)) == 0;
}

/**
 * \brief PCI FLR for each Octeon device.
 * @param oct octeon device
 */
static void octeon_pci_flr(struct octeon_device *oct)
{
        int rc;

        pci_save_state(oct->pci_dev);

        pci_cfg_access_lock(oct->pci_dev);

        /* Quiesce the device completely */
        pci_write_config_word(oct->pci_dev, PCI_COMMAND,
                              PCI_COMMAND_INTX_DISABLE);

        rc = __pci_reset_function_locked(oct->pci_dev);

        if (rc != 0)
                dev_err(&oct->pci_dev->dev, "Error %d resetting PCI function %d\n",
                        rc, oct->pf_num);

        pci_cfg_access_unlock(oct->pci_dev);

        pci_restore_state(oct->pci_dev);
}

/**
 *\brief Destroy resources associated with octeon device
 * @param pdev PCI device structure
 * @param ent unused
 */
static void octeon_destroy_resources(struct octeon_device *oct)
{
        int i, refcount;
        struct msix_entry *msix_entries;
        struct octeon_device_priv *oct_priv =
                (struct octeon_device_priv *)oct->priv;

        struct handshake *hs;

        switch (atomic_read(&oct->status)) {
        case OCT_DEV_RUNNING:
        case OCT_DEV_CORE_OK:

                /* No more instructions will be forwarded. */
                atomic_set(&oct->status, OCT_DEV_IN_RESET);

                oct->app_mode = CVM_DRV_INVALID_APP;
                dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
                        lio_get_state_string(&oct->status));

                schedule_timeout_uninterruptible(HZ / 10);

                /* fallthrough */
        case OCT_DEV_HOST_OK:

                /* fallthrough */
        case OCT_DEV_CONSOLE_INIT_DONE:
                /* Remove any consoles */
                octeon_remove_consoles(oct);

                /* fallthrough */
        case OCT_DEV_IO_QUEUES_DONE:
                if (wait_for_pending_requests(oct))
                        dev_err(&oct->pci_dev->dev, "There were pending requests\n");

                if (lio_wait_for_instr_fetch(oct))
                        dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");

                /* Disable the input and output queues now. No more packets will
                 * arrive from Octeon, but we should wait for all packet
                 * processing to finish.
                 */
                oct->fn_list.disable_io_queues(oct);

                if (lio_wait_for_oq_pkts(oct))
                        dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");

        /* fallthrough */
        case OCT_DEV_INTR_SET_DONE:
                /* Disable interrupts  */
                oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);

                if (oct->msix_on) {
                        msix_entries = (struct msix_entry *)oct->msix_entries;
                        for (i = 0; i < oct->num_msix_irqs - 1; i++) {
                                if (oct->ioq_vector[i].vector) {
                                        /* clear the affinity_cpumask */
                                        irq_set_affinity_hint(
                                                        msix_entries[i].vector,
                                                        NULL);
                                        free_irq(msix_entries[i].vector,
                                                 &oct->ioq_vector[i]);
                                        oct->ioq_vector[i].vector = 0;
                                }
                        }
                        /* non-iov vector's argument is oct struct */
                        free_irq(msix_entries[i].vector, oct);

                        pci_disable_msix(oct->pci_dev);
                        kfree(oct->msix_entries);
                        oct->msix_entries = NULL;
                } else {
                        /* Release the interrupt line */
                        free_irq(oct->pci_dev->irq, oct);

                        if (oct->flags & LIO_FLAG_MSI_ENABLED)
                                pci_disable_msi(oct->pci_dev);
                }

                kfree(oct->irq_name_storage);
                oct->irq_name_storage = NULL;

        /* fallthrough */
        case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
                if (OCTEON_CN23XX_PF(oct))
                        octeon_free_ioq_vector(oct);

        /* fallthrough */
        case OCT_DEV_MBOX_SETUP_DONE:
                if (OCTEON_CN23XX_PF(oct))
                        oct->fn_list.free_mbox(oct);

        /* fallthrough */
        case OCT_DEV_IN_RESET:
        case OCT_DEV_DROQ_INIT_DONE:
                /* Wait for any pending operations */
                mdelay(100);
                for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
                        if (!(oct->io_qmask.oq & BIT_ULL(i)))
                                continue;
                        octeon_delete_droq(oct, i);
                }

                /* Force any pending handshakes to complete */
                for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
                        hs = &handshake[i];

                        if (hs->pci_dev) {
                                handshake[oct->octeon_id].init_ok = 0;
                                complete(&handshake[oct->octeon_id].init);
                                handshake[oct->octeon_id].started_ok = 0;
                                complete(&handshake[oct->octeon_id].started);
                        }
                }

                /* fallthrough */
        case OCT_DEV_RESP_LIST_INIT_DONE:
                octeon_delete_response_list(oct);

                /* fallthrough */
        case OCT_DEV_INSTR_QUEUE_INIT_DONE:
                for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
                        if (!(oct->io_qmask.iq & BIT_ULL(i)))
                                continue;
                        octeon_delete_instr_queue(oct, i);
                }
#ifdef CONFIG_PCI_IOV
                if (oct->sriov_info.sriov_enabled)
                        pci_disable_sriov(oct->pci_dev);
#endif
                /* fallthrough */
        case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
                octeon_free_sc_buffer_pool(oct);

                /* fallthrough */
        case OCT_DEV_DISPATCH_INIT_DONE:
                octeon_delete_dispatch_list(oct);
                cancel_delayed_work_sync(&oct->nic_poll_work.work);

                /* fallthrough */
        case OCT_DEV_PCI_MAP_DONE:
                refcount = octeon_deregister_device(oct);

                /* Soft reset the octeon device before exiting.
                 * However, if fw was loaded from card (i.e. autoboot),
                 * perform an FLR instead.
                 * Implementation note: only soft-reset the device
                 * if it is a CN6XXX OR the LAST CN23XX device.
                 */
                if (atomic_read(oct->adapter_fw_state) == FW_IS_PRELOADED)
                        octeon_pci_flr(oct);
                else if (OCTEON_CN6XXX(oct) || !refcount)
                        oct->fn_list.soft_reset(oct);

                octeon_unmap_pci_barx(oct, 0);
                octeon_unmap_pci_barx(oct, 1);

                /* fallthrough */
        case OCT_DEV_PCI_ENABLE_DONE:
                pci_clear_master(oct->pci_dev);
                /* Disable the device, releasing the PCI INT */
                pci_disable_device(oct->pci_dev);

                /* fallthrough */
        case OCT_DEV_BEGIN_STATE:
                /* Nothing to be done here either */
                break;
        }                       /* end switch (oct->status) */

        tasklet_kill(&oct_priv->droq_tasklet);
}

/**
 * \brief Callback for rx ctrl
 * @param status status of request
 * @param buf pointer to resp structure
 */
static void rx_ctl_callback(struct octeon_device *oct,
                            u32 status,
                            void *buf)
{
        struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
        struct liquidio_rx_ctl_context *ctx;

        ctx  = (struct liquidio_rx_ctl_context *)sc->ctxptr;

        oct = lio_get_device(ctx->octeon_id);
        if (status)
                dev_err(&oct->pci_dev->dev, "rx ctl instruction failed. Status: %llx\n",
                        CVM_CAST64(status));
        WRITE_ONCE(ctx->cond, 1);

        /* This barrier is required to be sure that the response has been
         * written fully before waking up the handler
         */
        wmb();

        wake_up_interruptible(&ctx->wc);
}

/**
 * \brief Send Rx control command
 * @param lio per-network private data
 * @param start_stop whether to start or stop
 */
static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
{
        struct octeon_soft_command *sc;
        struct liquidio_rx_ctl_context *ctx;
        union octnet_cmd *ncmd;
        int ctx_size = sizeof(struct liquidio_rx_ctl_context);
        struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
        int retval;

        if (oct->props[lio->ifidx].rx_on == start_stop)
                return;

        sc = (struct octeon_soft_command *)
                octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
                                          16, ctx_size);

        ncmd = (union octnet_cmd *)sc->virtdptr;
        ctx  = (struct liquidio_rx_ctl_context *)sc->ctxptr;

        WRITE_ONCE(ctx->cond, 0);
        ctx->octeon_id = lio_get_device_id(oct);
        init_waitqueue_head(&ctx->wc);

        ncmd->u64 = 0;
        ncmd->s.cmd = OCTNET_CMD_RX_CTL;
        ncmd->s.param1 = start_stop;

        octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));

        sc->iq_no = lio->linfo.txpciq[0].s.q_no;

        octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
                                    OPCODE_NIC_CMD, 0, 0, 0);

        sc->callback = rx_ctl_callback;
        sc->callback_arg = sc;
        sc->wait_time = 5000;

        retval = octeon_send_soft_command(oct, sc);
        if (retval == IQ_SEND_FAILED) {
                netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
        } else {
                /* Sleep on a wait queue till the cond flag indicates that the
                 * response arrived or timed-out.
                 */
                if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR)
                        return;
                oct->props[lio->ifidx].rx_on = start_stop;
        }

        octeon_free_soft_command(oct, sc);
}

/**
 * \brief Destroy NIC device interface
 * @param oct octeon device
 * @param ifidx which interface to destroy
 *
 * Cleanup associated with each interface for an Octeon device  when NIC
 * module is being unloaded or if initialization fails during load.
 */
static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
{
        struct net_device *netdev = oct->props[ifidx].netdev;
        struct lio *lio;
        struct napi_struct *napi, *n;

        if (!netdev) {
                dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
                        __func__, ifidx);
                return;
        }

        lio = GET_LIO(netdev);

        dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");

        if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
                liquidio_stop(netdev);

        if (oct->props[lio->ifidx].napi_enabled == 1) {
                list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
                        napi_disable(napi);

                oct->props[lio->ifidx].napi_enabled = 0;

                if (OCTEON_CN23XX_PF(oct))
                        oct->droq[0]->ops.poll_mode = 0;
        }

        /* Delete NAPI */
        list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
                netif_napi_del(napi);

        if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
                unregister_netdev(netdev);

        cleanup_sync_octeon_time_wq(netdev);
        cleanup_link_status_change_wq(netdev);

        cleanup_rx_oom_poll_fn(netdev);

        delete_glists(lio);

        free_netdev(netdev);

        oct->props[ifidx].gmxport = -1;

        oct->props[ifidx].netdev = NULL;
}

/**
 * \brief Stop complete NIC functionality
 * @param oct octeon device
 */
static int liquidio_stop_nic_module(struct octeon_device *oct)
{
        int i, j;
        struct lio *lio;

        dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
        if (!oct->ifcount) {
                dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
                return 1;
        }

        spin_lock_bh(&oct->cmd_resp_wqlock);
        oct->cmd_resp_state = OCT_DRV_OFFLINE;
        spin_unlock_bh(&oct->cmd_resp_wqlock);

        lio_vf_rep_destroy(oct);

        for (i = 0; i < oct->ifcount; i++) {
                lio = GET_LIO(oct->props[i].netdev);
                for (j = 0; j < oct->num_oqs; j++)
                        octeon_unregister_droq_ops(oct,
                                                   lio->linfo.rxpciq[j].s.q_no);
        }

        for (i = 0; i < oct->ifcount; i++)
                liquidio_destroy_nic_device(oct, i);

        if (oct->devlink) {
                devlink_unregister(oct->devlink);
                devlink_free(oct->devlink);
                oct->devlink = NULL;
        }

        dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
        return 0;
}

/**
 * \brief Cleans up resources at unload time
 * @param pdev PCI device structure
 */
static void liquidio_remove(struct pci_dev *pdev)
{
        struct octeon_device *oct_dev = pci_get_drvdata(pdev);

        dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");

        if (oct_dev->watchdog_task)
                kthread_stop(oct_dev->watchdog_task);

        if (!oct_dev->octeon_id &&
            oct_dev->fw_info.app_cap_flags & LIQUIDIO_SWITCHDEV_CAP)
                lio_vf_rep_modexit();

        if (oct_dev->app_mode && (oct_dev->app_mode == CVM_DRV_NIC_APP))
                liquidio_stop_nic_module(oct_dev);

        /* Reset the octeon device and cleanup all memory allocated for
         * the octeon device by driver.
         */
        octeon_destroy_resources(oct_dev);

        dev_info(&oct_dev->pci_dev->dev, "Device removed\n");

        /* This octeon device has been removed. Update the global
         * data structure to reflect this. Free the device structure.
         */
        octeon_free_device_mem(oct_dev);
}

/**
 * \brief Identify the Octeon device and to map the BAR address space
 * @param oct octeon device
 */
static int octeon_chip_specific_setup(struct octeon_device *oct)
{
        u32 dev_id, rev_id;
        int ret = 1;
        char *s;

        pci_read_config_dword(oct->pci_dev, 0, &dev_id);
        pci_read_config_dword(oct->pci_dev, 8, &rev_id);
        oct->rev_id = rev_id & 0xff;

        switch (dev_id) {
        case OCTEON_CN68XX_PCIID:
                oct->chip_id = OCTEON_CN68XX;
                ret = lio_setup_cn68xx_octeon_device(oct);
                s = "CN68XX";
                break;

        case OCTEON_CN66XX_PCIID:
                oct->chip_id = OCTEON_CN66XX;
                ret = lio_setup_cn66xx_octeon_device(oct);
                s = "CN66XX";
                break;

        case OCTEON_CN23XX_PCIID_PF:
                oct->chip_id = OCTEON_CN23XX_PF_VID;
                ret = setup_cn23xx_octeon_pf_device(oct);
                if (ret)
                        break;
#ifdef CONFIG_PCI_IOV
                if (!ret)
                        pci_sriov_set_totalvfs(oct->pci_dev,
                                               oct->sriov_info.max_vfs);
#endif
                s = "CN23XX";
                break;

        default:
                s = "?";
                dev_err(&oct->pci_dev->dev, "Unknown device found (dev_id: %x)\n",
                        dev_id);
        }

        if (!ret)
                dev_info(&oct->pci_dev->dev, "%s PASS%d.%d %s Version: %s\n", s,
                         OCTEON_MAJOR_REV(oct),
                         OCTEON_MINOR_REV(oct),
                         octeon_get_conf(oct)->card_name,
                         LIQUIDIO_VERSION);

        return ret;
}

/**
 * \brief PCI initialization for each Octeon device.
 * @param oct octeon device
 */
static int octeon_pci_os_setup(struct octeon_device *oct)
{
        /* setup PCI stuff first */
        if (pci_enable_device(oct->pci_dev)) {
                dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
                return 1;
        }

        if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
                dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
                pci_disable_device(oct->pci_dev);
                return 1;
        }

        /* Enable PCI DMA Master. */
        pci_set_master(oct->pci_dev);

        return 0;
}

static inline int skb_iq(struct lio *lio, struct sk_buff *skb)
{
        int q = 0;

        if (netif_is_multiqueue(lio->netdev))
                q = skb->queue_mapping % lio->linfo.num_txpciq;

        return q;
}

/**
 * \brief Check Tx queue state for a given network buffer
 * @param lio per-network private data
 * @param skb network buffer
 */
static inline int check_txq_state(struct lio *lio, struct sk_buff *skb)
{
        int q = 0, iq = 0;

        if (netif_is_multiqueue(lio->netdev)) {
                q = skb->queue_mapping;
                iq = lio->linfo.txpciq[(q % lio->oct_dev->num_iqs)].s.q_no;
        } else {
                iq = lio->txq;
                q = iq;
        }

        if (octnet_iq_is_full(lio->oct_dev, iq))
                return 0;

        if (__netif_subqueue_stopped(lio->netdev, q)) {
                INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq, tx_restart, 1);
                wake_q(lio->netdev, q);
        }
        return 1;
}

/**
 * \brief Unmap and free network buffer
 * @param buf buffer
 */
static void free_netbuf(void *buf)
{
        struct sk_buff *skb;
        struct octnet_buf_free_info *finfo;
        struct lio *lio;

        finfo = (struct octnet_buf_free_info *)buf;
        skb = finfo->skb;
        lio = finfo->lio;

        dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
                         DMA_TO_DEVICE);

        check_txq_state(lio, skb);

        tx_buffer_free(skb);
}

/**
 * \brief Unmap and free gather buffer
 * @param buf buffer
 */
static void free_netsgbuf(void *buf)
{
        struct octnet_buf_free_info *finfo;
        struct sk_buff *skb;
        struct lio *lio;
        struct octnic_gather *g;
        int i, frags, iq;

        finfo = (struct octnet_buf_free_info *)buf;
        skb = finfo->skb;
        lio = finfo->lio;
        g = finfo->g;
        frags = skb_shinfo(skb)->nr_frags;

        dma_unmap_single(&lio->oct_dev->pci_dev->dev,
                         g->sg[0].ptr[0], (skb->len - skb->data_len),
                         DMA_TO_DEVICE);

        i = 1;
        while (frags--) {
                struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];

                pci_unmap_page((lio->oct_dev)->pci_dev,
                               g->sg[(i >> 2)].ptr[(i & 3)],
                               frag->size, DMA_TO_DEVICE);
                i++;
        }

        iq = skb_iq(lio, skb);
        spin_lock(&lio->glist_lock[iq]);
        list_add_tail(&g->list, &lio->glist[iq]);
        spin_unlock(&lio->glist_lock[iq]);

        check_txq_state(lio, skb);     /* mq support: sub-queue state check */

        tx_buffer_free(skb);
}

/**
 * \brief Unmap and free gather buffer with response
 * @param buf buffer
 */
static void free_netsgbuf_with_resp(void *buf)
{
        struct octeon_soft_command *sc;
        struct octnet_buf_free_info *finfo;
        struct sk_buff *skb;
        struct lio *lio;
        struct octnic_gather *g;
        int i, frags, iq;

        sc = (struct octeon_soft_command *)buf;
        skb = (struct sk_buff *)sc->callback_arg;
        finfo = (struct octnet_buf_free_info *)&skb->cb;

        lio = finfo->lio;
        g = finfo->g;
        frags = skb_shinfo(skb)->nr_frags;

        dma_unmap_single(&lio->oct_dev->pci_dev->dev,
                         g->sg[0].ptr[0], (skb->len - skb->data_len),
                         DMA_TO_DEVICE);

        i = 1;
        while (frags--) {
                struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];

                pci_unmap_page((lio->oct_dev)->pci_dev,
                               g->sg[(i >> 2)].ptr[(i & 3)],
                               frag->size, DMA_TO_DEVICE);
                i++;
        }

        iq = skb_iq(lio, skb);

        spin_lock(&lio->glist_lock[iq]);
        list_add_tail(&g->list, &lio->glist[iq]);
        spin_unlock(&lio->glist_lock[iq]);

        /* Don't free the skb yet */

        check_txq_state(lio, skb);
}

/**
 * \brief Adjust ptp frequency
 * @param ptp PTP clock info
 * @param ppb how much to adjust by, in parts-per-billion
 */
static int liquidio_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
{
        struct lio *lio = container_of(ptp, struct lio, ptp_info);
        struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
        u64 comp, delta;
        unsigned long flags;
        bool neg_adj = false;

        if (ppb < 0) {
                neg_adj = true;
                ppb = -ppb;
        }

        /* The hardware adds the clock compensation value to the
         * PTP clock on every coprocessor clock cycle, so we
         * compute the delta in terms of coprocessor clocks.
         */
        delta = (u64)ppb << 32;
        do_div(delta, oct->coproc_clock_rate);

        spin_lock_irqsave(&lio->ptp_lock, flags);
        comp = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_COMP);
        if (neg_adj)
                comp -= delta;
        else
                comp += delta;
        lio_pci_writeq(oct, comp, CN6XXX_MIO_PTP_CLOCK_COMP);
        spin_unlock_irqrestore(&lio->ptp_lock, flags);

        return 0;
}

/**
 * \brief Adjust ptp time
 * @param ptp PTP clock info
 * @param delta how much to adjust by, in nanosecs
 */
static int liquidio_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
        unsigned long flags;
        struct lio *lio = container_of(ptp, struct lio, ptp_info);

        spin_lock_irqsave(&lio->ptp_lock, flags);
        lio->ptp_adjust += delta;
        spin_unlock_irqrestore(&lio->ptp_lock, flags);

        return 0;
}

/**
 * \brief Get hardware clock time, including any adjustment
 * @param ptp PTP clock info
 * @param ts timespec
 */
static int liquidio_ptp_gettime(struct ptp_clock_info *ptp,
                                struct timespec64 *ts)
{
        u64 ns;
        unsigned long flags;
        struct lio *lio = container_of(ptp, struct lio, ptp_info);
        struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;

        spin_lock_irqsave(&lio->ptp_lock, flags);
        ns = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_HI);
        ns += lio->ptp_adjust;
        spin_unlock_irqrestore(&lio->ptp_lock, flags);

        *ts = ns_to_timespec64(ns);

        return 0;
}

/**
 * \brief Set hardware clock time. Reset adjustment
 * @param ptp PTP clock info
 * @param ts timespec
 */
static int liquidio_ptp_settime(struct ptp_clock_info *ptp,
                                const struct timespec64 *ts)
{
        u64 ns;
        unsigned long flags;
        struct lio *lio = container_of(ptp, struct lio, ptp_info);
        struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;

        ns = timespec64_to_ns(ts);

        spin_lock_irqsave(&lio->ptp_lock, flags);
        lio_pci_writeq(oct, ns, CN6XXX_MIO_PTP_CLOCK_HI);
        lio->ptp_adjust = 0;
        spin_unlock_irqrestore(&lio->ptp_lock, flags);

        return 0;
}

/**
 * \brief Check if PTP is enabled
 * @param ptp PTP clock info
 * @param rq request
 * @param on is it on
 */
static int
liquidio_ptp_enable(struct ptp_clock_info *ptp __attribute__((unused)),
                    struct ptp_clock_request *rq __attribute__((unused)),
                    int on __attribute__((unused)))
{
        return -EOPNOTSUPP;
}

/**
 * \brief Open PTP clock source
 * @param netdev network device
 */
static void oct_ptp_open(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;

        spin_lock_init(&lio->ptp_lock);

        snprintf(lio->ptp_info.name, 16, "%s", netdev->name);
        lio->ptp_info.owner = THIS_MODULE;
        lio->ptp_info.max_adj = 250000000;
        lio->ptp_info.n_alarm = 0;
        lio->ptp_info.n_ext_ts = 0;
        lio->ptp_info.n_per_out = 0;
        lio->ptp_info.pps = 0;
        lio->ptp_info.adjfreq = liquidio_ptp_adjfreq;
        lio->ptp_info.adjtime = liquidio_ptp_adjtime;
        lio->ptp_info.gettime64 = liquidio_ptp_gettime;
        lio->ptp_info.settime64 = liquidio_ptp_settime;
        lio->ptp_info.enable = liquidio_ptp_enable;

        lio->ptp_adjust = 0;

        lio->ptp_clock = ptp_clock_register(&lio->ptp_info,
                                             &oct->pci_dev->dev);

        if (IS_ERR(lio->ptp_clock))
                lio->ptp_clock = NULL;
}

/**
 * \brief Init PTP clock
 * @param oct octeon device
 */
static void liquidio_ptp_init(struct octeon_device *oct)
{
        u64 clock_comp, cfg;

        clock_comp = (u64)NSEC_PER_SEC << 32;
        do_div(clock_comp, oct->coproc_clock_rate);
        lio_pci_writeq(oct, clock_comp, CN6XXX_MIO_PTP_CLOCK_COMP);

        /* Enable */
        cfg = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_CFG);
        lio_pci_writeq(oct, cfg | 0x01, CN6XXX_MIO_PTP_CLOCK_CFG);
}

/**
 * \brief Load firmware to device
 * @param oct octeon device
 *
 * Maps device to firmware filename, requests firmware, and downloads it
 */
static int load_firmware(struct octeon_device *oct)
{
        int ret = 0;
        const struct firmware *fw;
        char fw_name[LIO_MAX_FW_FILENAME_LEN];
        char *tmp_fw_type;

        if (fw_type_is_auto()) {
                tmp_fw_type = LIO_FW_NAME_TYPE_NIC;
                strncpy(fw_type, tmp_fw_type, sizeof(fw_type));
        } else {
                tmp_fw_type = fw_type;
        }

        sprintf(fw_name, "%s%s%s_%s%s", LIO_FW_DIR, LIO_FW_BASE_NAME,
                octeon_get_conf(oct)->card_name, tmp_fw_type,
                LIO_FW_NAME_SUFFIX);

        ret = request_firmware(&fw, fw_name, &oct->pci_dev->dev);
        if (ret) {
                dev_err(&oct->pci_dev->dev, "Request firmware failed. Could not find file %s.\n.",
                        fw_name);
                release_firmware(fw);
                return ret;
        }

        ret = octeon_download_firmware(oct, fw->data, fw->size);

        release_firmware(fw);

        return ret;
}

/**
 * \brief Callback for getting interface configuration
 * @param status status of request
 * @param buf pointer to resp structure
 */
static void if_cfg_callback(struct octeon_device *oct,
                            u32 status __attribute__((unused)),
                            void *buf)
{
        struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
        struct liquidio_if_cfg_resp *resp;
        struct liquidio_if_cfg_context *ctx;

        resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
        ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;

        oct = lio_get_device(ctx->octeon_id);
        if (resp->status)
                dev_err(&oct->pci_dev->dev, "nic if cfg instruction failed. Status: 0x%llx (0x%08x)\n",
                        CVM_CAST64(resp->status), status);
        WRITE_ONCE(ctx->cond, 1);

        snprintf(oct->fw_info.liquidio_firmware_version, 32, "%s",
                 resp->cfg_info.liquidio_firmware_version);

        /* This barrier is required to be sure that the response has been
         * written fully before waking up the handler
         */
        wmb();

        wake_up_interruptible(&ctx->wc);
}

/**
 * \brief Poll routine for checking transmit queue status
 * @param work work_struct data structure
 */
static void octnet_poll_check_txq_status(struct work_struct *work)
{
        struct cavium_wk *wk = (struct cavium_wk *)work;
        struct lio *lio = (struct lio *)wk->ctxptr;

        if (!ifstate_check(lio, LIO_IFSTATE_RUNNING))
                return;

        check_txq_status(lio);
        queue_delayed_work(lio->txq_status_wq.wq,
                           &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
}

/**
 * \brief Sets up the txq poll check
 * @param netdev network device
 */
static inline int setup_tx_poll_fn(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;

        lio->txq_status_wq.wq = alloc_workqueue("txq-status",
                                                WQ_MEM_RECLAIM, 0);
        if (!lio->txq_status_wq.wq) {
                dev_err(&oct->pci_dev->dev, "unable to create cavium txq status wq\n");
                return -1;
        }
        INIT_DELAYED_WORK(&lio->txq_status_wq.wk.work,
                          octnet_poll_check_txq_status);
        lio->txq_status_wq.wk.ctxptr = lio;
        queue_delayed_work(lio->txq_status_wq.wq,
                           &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
        return 0;
}

static inline void cleanup_tx_poll_fn(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);

        if (lio->txq_status_wq.wq) {
                cancel_delayed_work_sync(&lio->txq_status_wq.wk.work);
                destroy_workqueue(lio->txq_status_wq.wq);
        }
}

/**
 * \brief Net device open for LiquidIO
 * @param netdev network device
 */
static int liquidio_open(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct napi_struct *napi, *n;

        if (oct->props[lio->ifidx].napi_enabled == 0) {
                list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
                        napi_enable(napi);

                oct->props[lio->ifidx].napi_enabled = 1;

                if (OCTEON_CN23XX_PF(oct))
                        oct->droq[0]->ops.poll_mode = 1;
        }

        if (oct->ptp_enable)
                oct_ptp_open(netdev);

        ifstate_set(lio, LIO_IFSTATE_RUNNING);

        /* Ready for link status updates */
        lio->intf_open = 1;

        netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");

        if (OCTEON_CN23XX_PF(oct)) {
                if (!oct->msix_on)
                        if (setup_tx_poll_fn(netdev))
                                return -1;
        } else {
                if (setup_tx_poll_fn(netdev))
                        return -1;
        }

        start_txq(netdev);

        /* tell Octeon to start forwarding packets to host */
        send_rx_ctrl_cmd(lio, 1);

        dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
                 netdev->name);

        return 0;
}

/**
 * \brief Net device stop for LiquidIO
 * @param netdev network device
 */
static int liquidio_stop(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct napi_struct *napi, *n;

        if (oct->props[lio->ifidx].napi_enabled) {
                list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
                        napi_disable(napi);

                oct->props[lio->ifidx].napi_enabled = 0;

                if (OCTEON_CN23XX_PF(oct))
                        oct->droq[0]->ops.poll_mode = 0;
        }

        ifstate_reset(lio, LIO_IFSTATE_RUNNING);

        netif_tx_disable(netdev);

        /* Inform that netif carrier is down */
        netif_carrier_off(netdev);
        lio->intf_open = 0;
        lio->linfo.link.s.link_up = 0;
        lio->link_changes++;

        /* Tell Octeon that nic interface is down. */
        send_rx_ctrl_cmd(lio, 0);

        if (OCTEON_CN23XX_PF(oct)) {
                if (!oct->msix_on)
                        cleanup_tx_poll_fn(netdev);
        } else {
                cleanup_tx_poll_fn(netdev);
        }

        if (lio->ptp_clock) {
                ptp_clock_unregister(lio->ptp_clock);
                lio->ptp_clock = NULL;
        }

        dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);

        return 0;
}

/**
 * \brief Converts a mask based on net device flags
 * @param netdev network device
 *
 * This routine generates a octnet_ifflags mask from the net device flags
 * received from the OS.
 */
static inline enum octnet_ifflags get_new_flags(struct net_device *netdev)
{
        enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;

        if (netdev->flags & IFF_PROMISC)
                f |= OCTNET_IFFLAG_PROMISC;

        if (netdev->flags & IFF_ALLMULTI)
                f |= OCTNET_IFFLAG_ALLMULTI;

        if (netdev->flags & IFF_MULTICAST) {
                f |= OCTNET_IFFLAG_MULTICAST;

                /* Accept all multicast addresses if there are more than we
                 * can handle
                 */
                if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
                        f |= OCTNET_IFFLAG_ALLMULTI;
        }

        if (netdev->flags & IFF_BROADCAST)
                f |= OCTNET_IFFLAG_BROADCAST;

        return f;
}

/**
 * \brief Net device set_multicast_list
 * @param netdev network device
 */
static void liquidio_set_mcast_list(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        struct netdev_hw_addr *ha;
        u64 *mc;
        int ret;
        int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        /* Create a ctrl pkt command to be sent to core app. */
        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
        nctrl.ncmd.s.param1 = get_new_flags(netdev);
        nctrl.ncmd.s.param2 = mc_count;
        nctrl.ncmd.s.more = mc_count;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        /* copy all the addresses into the udd */
        mc = &nctrl.udd[0];
        netdev_for_each_mc_addr(ha, netdev) {
                *mc = 0;
                memcpy(((u8 *)mc) + 2, ha->addr, ETH_ALEN);
                /* no need to swap bytes */

                if (++mc > &nctrl.udd[mc_count])
                        break;
        }

        /* Apparently, any activity in this call from the kernel has to
         * be atomic. So we won't wait for response.
         */
        nctrl.wait_time = 0;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
                        ret);
        }
}

/**
 * \brief Net device set_mac_address
 * @param netdev network device
 */
static int liquidio_set_mac(struct net_device *netdev, void *p)
{
        int ret = 0;
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct sockaddr *addr = (struct sockaddr *)p;
        struct octnic_ctrl_pkt nctrl;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
        nctrl.ncmd.s.param1 = 0;
        nctrl.ncmd.s.more = 1;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
        nctrl.wait_time = 100;

        nctrl.udd[0] = 0;
        /* The MAC Address is presented in network byte order. */
        memcpy((u8 *)&nctrl.udd[0] + 2, addr->sa_data, ETH_ALEN);

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
                return -ENOMEM;
        }
        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
        memcpy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data, ETH_ALEN);

        return 0;
}

/**
 * \brief Net device get_stats
 * @param netdev network device
 */
static struct net_device_stats *liquidio_get_stats(struct net_device *netdev)
{
        struct lio *lio = GET_LIO(netdev);
        struct net_device_stats *stats = &netdev->stats;
        struct octeon_device *oct;
        u64 pkts = 0, drop = 0, bytes = 0;
        struct oct_droq_stats *oq_stats;
        struct oct_iq_stats *iq_stats;
        int i, iq_no, oq_no;

        oct = lio->oct_dev;

        if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
                return stats;

        for (i = 0; i < oct->num_iqs; i++) {
                iq_no = lio->linfo.txpciq[i].s.q_no;
                iq_stats = &oct->instr_queue[iq_no]->stats;
                pkts += iq_stats->tx_done;
                drop += iq_stats->tx_dropped;
                bytes += iq_stats->tx_tot_bytes;
        }

        stats->tx_packets = pkts;
        stats->tx_bytes = bytes;
        stats->tx_dropped = drop;

        pkts = 0;
        drop = 0;
        bytes = 0;

        for (i = 0; i < oct->num_oqs; i++) {
                oq_no = lio->linfo.rxpciq[i].s.q_no;
                oq_stats = &oct->droq[oq_no]->stats;
                pkts += oq_stats->rx_pkts_received;
                drop += (oq_stats->rx_dropped +
                         oq_stats->dropped_nodispatch +
                         oq_stats->dropped_toomany +
                         oq_stats->dropped_nomem);
                bytes += oq_stats->rx_bytes_received;
        }

        stats->rx_bytes = bytes;
        stats->rx_packets = pkts;
        stats->rx_dropped = drop;

        return stats;
}

/**
 * \brief Net device change_mtu
 * @param netdev network device
 */
static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        int ret = 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MTU;
        nctrl.ncmd.s.param1 = new_mtu;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.wait_time = 100;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev, "Failed to set MTU\n");
                return -1;
        }

        lio->mtu = new_mtu;

        return 0;
}

/**
 * \brief Handler for SIOCSHWTSTAMP ioctl
 * @param netdev network device
 * @param ifr interface request
 * @param cmd command
 */
static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
{
        struct hwtstamp_config conf;
        struct lio *lio = GET_LIO(netdev);

        if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
                return -EFAULT;

        if (conf.flags)
                return -EINVAL;

        switch (conf.tx_type) {
        case HWTSTAMP_TX_ON:
        case HWTSTAMP_TX_OFF:
                break;
        default:
                return -ERANGE;
        }

        switch (conf.rx_filter) {
        case HWTSTAMP_FILTER_NONE:
                break;
        case HWTSTAMP_FILTER_ALL:
        case HWTSTAMP_FILTER_SOME:
        case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
        case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
        case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
        case HWTSTAMP_FILTER_PTP_V2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
        case HWTSTAMP_FILTER_NTP_ALL:
                conf.rx_filter = HWTSTAMP_FILTER_ALL;
                break;
        default:
                return -ERANGE;
        }

        if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
                ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);

        else
                ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);

        return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
}

/**
 * \brief ioctl handler
 * @param netdev network device
 * @param ifr interface request
 * @param cmd command
 */
static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
        struct lio *lio = GET_LIO(netdev);

        switch (cmd) {
        case SIOCSHWTSTAMP:
                if (lio->oct_dev->ptp_enable)
                        return hwtstamp_ioctl(netdev, ifr);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * \brief handle a Tx timestamp response
 * @param status response status
 * @param buf pointer to skb
 */
static void handle_timestamp(struct octeon_device *oct,
                             u32 status,
                             void *buf)
{
        struct octnet_buf_free_info *finfo;
        struct octeon_soft_command *sc;
        struct oct_timestamp_resp *resp;
        struct lio *lio;
        struct sk_buff *skb = (struct sk_buff *)buf;

        finfo = (struct octnet_buf_free_info *)skb->cb;
        lio = finfo->lio;
        sc = finfo->sc;
        oct = lio->oct_dev;
        resp = (struct oct_timestamp_resp *)sc->virtrptr;

        if (status != OCTEON_REQUEST_DONE) {
                dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
                        CVM_CAST64(status));
                resp->timestamp = 0;
        }

        octeon_swap_8B_data(&resp->timestamp, 1);

        if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) != 0)) {
                struct skb_shared_hwtstamps ts;
                u64 ns = resp->timestamp;

                netif_info(lio, tx_done, lio->netdev,
                           "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
                           skb, (unsigned long long)ns);
                ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
                skb_tstamp_tx(skb, &ts);
        }

        octeon_free_soft_command(oct, sc);
        tx_buffer_free(skb);
}

/* \brief Send a data packet that will be timestamped
 * @param oct octeon device
 * @param ndata pointer to network data
 * @param finfo pointer to private network data
 */
static inline int send_nic_timestamp_pkt(struct octeon_device *oct,
                                         struct octnic_data_pkt *ndata,
                                         struct octnet_buf_free_info *finfo,
                                         int xmit_more)
{
        int retval;
        struct octeon_soft_command *sc;
        struct lio *lio;
        int ring_doorbell;
        u32 len;

        lio = finfo->lio;

        sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
                                            sizeof(struct oct_timestamp_resp));
        finfo->sc = sc;

        if (!sc) {
                dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
                return IQ_SEND_FAILED;
        }

        if (ndata->reqtype == REQTYPE_NORESP_NET)
                ndata->reqtype = REQTYPE_RESP_NET;
        else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
                ndata->reqtype = REQTYPE_RESP_NET_SG;

        sc->callback = handle_timestamp;
        sc->callback_arg = finfo->skb;
        sc->iq_no = ndata->q_no;

        if (OCTEON_CN23XX_PF(oct))
                len = (u32)((struct octeon_instr_ih3 *)
                            (&sc->cmd.cmd3.ih3))->dlengsz;
        else
                len = (u32)((struct octeon_instr_ih2 *)
                            (&sc->cmd.cmd2.ih2))->dlengsz;

        ring_doorbell = !xmit_more;

        retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
                                     sc, len, ndata->reqtype);

        if (retval == IQ_SEND_FAILED) {
                dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
                        retval);
                octeon_free_soft_command(oct, sc);
        } else {
                netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
        }

        return retval;
}

/** \brief Transmit networks packets to the Octeon interface
 * @param skbuff   skbuff struct to be passed to network layer.
 * @param netdev    pointer to network device
 * @returns whether the packet was transmitted to the device okay or not
 *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
 */
static int liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
{
        struct lio *lio;
        struct octnet_buf_free_info *finfo;
        union octnic_cmd_setup cmdsetup;
        struct octnic_data_pkt ndata;
        struct octeon_device *oct;
        struct oct_iq_stats *stats;
        struct octeon_instr_irh *irh;
        union tx_info *tx_info;
        int status = 0;
        int q_idx = 0, iq_no = 0;
        int j, xmit_more = 0;
        u64 dptr = 0;
        u32 tag = 0;

        lio = GET_LIO(netdev);
        oct = lio->oct_dev;

        if (netif_is_multiqueue(netdev)) {
                q_idx = skb->queue_mapping;
                q_idx = (q_idx % (lio->linfo.num_txpciq));
                tag = q_idx;
                iq_no = lio->linfo.txpciq[q_idx].s.q_no;
        } else {
                iq_no = lio->txq;
        }

        stats = &oct->instr_queue[iq_no]->stats;

        /* Check for all conditions in which the current packet cannot be
         * transmitted.
         */
        if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
            (!lio->linfo.link.s.link_up) ||
            (skb->len <= 0)) {
                netif_info(lio, tx_err, lio->netdev,
                           "Transmit failed link_status : %d\n",
                           lio->linfo.link.s.link_up);
                goto lio_xmit_failed;
        }

        /* Use space in skb->cb to store info used to unmap and
         * free the buffers.
         */
        finfo = (struct octnet_buf_free_info *)skb->cb;
        finfo->lio = lio;
        finfo->skb = skb;
        finfo->sc = NULL;

        /* Prepare the attributes for the data to be passed to OSI. */
        memset(&ndata, 0, sizeof(struct octnic_data_pkt));

        ndata.buf = (void *)finfo;

        ndata.q_no = iq_no;

        if (netif_is_multiqueue(netdev)) {
                if (octnet_iq_is_full(oct, ndata.q_no)) {
                        /* defer sending if queue is full */
                        netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
                                   ndata.q_no);
                        stats->tx_iq_busy++;
                        return NETDEV_TX_BUSY;
                }
        } else {
                if (octnet_iq_is_full(oct, lio->txq)) {
                        /* defer sending if queue is full */
                        stats->tx_iq_busy++;
                        netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
                                   lio->txq);
                        return NETDEV_TX_BUSY;
                }
        }
        /* pr_info(" XMIT - valid Qs: %d, 1st Q no: %d, cpu:  %d, q_no:%d\n",
         *      lio->linfo.num_txpciq, lio->txq, cpu, ndata.q_no);
         */

        ndata.datasize = skb->len;

        cmdsetup.u64 = 0;
        cmdsetup.s.iq_no = iq_no;

        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                if (skb->encapsulation) {
                        cmdsetup.s.tnl_csum = 1;
                        stats->tx_vxlan++;
                } else {
                        cmdsetup.s.transport_csum = 1;
                }
        }
        if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
                skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
                cmdsetup.s.timestamp = 1;
        }

        if (skb_shinfo(skb)->nr_frags == 0) {
                cmdsetup.s.u.datasize = skb->len;
                octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);

                /* Offload checksum calculation for TCP/UDP packets */
                dptr = dma_map_single(&oct->pci_dev->dev,
                                      skb->data,
                                      skb->len,
                                      DMA_TO_DEVICE);
                if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
                        dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
                                __func__);
                        return NETDEV_TX_BUSY;
                }

                if (OCTEON_CN23XX_PF(oct))
                        ndata.cmd.cmd3.dptr = dptr;
                else
                        ndata.cmd.cmd2.dptr = dptr;
                finfo->dptr = dptr;
                ndata.reqtype = REQTYPE_NORESP_NET;

        } else {
                int i, frags;
                struct skb_frag_struct *frag;
                struct octnic_gather *g;

                spin_lock(&lio->glist_lock[q_idx]);
                g = (struct octnic_gather *)
                        list_delete_head(&lio->glist[q_idx]);
                spin_unlock(&lio->glist_lock[q_idx]);

                if (!g) {
                        netif_info(lio, tx_err, lio->netdev,
                                   "Transmit scatter gather: glist null!\n");
                        goto lio_xmit_failed;
                }

                cmdsetup.s.gather = 1;
                cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
                octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);

                memset(g->sg, 0, g->sg_size);

                g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
                                                 skb->data,
                                                 (skb->len - skb->data_len),
                                                 DMA_TO_DEVICE);
                if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
                        dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
                                __func__);
                        return NETDEV_TX_BUSY;
                }
                add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);

                frags = skb_shinfo(skb)->nr_frags;
                i = 1;
                while (frags--) {
                        frag = &skb_shinfo(skb)->frags[i - 1];

                        g->sg[(i >> 2)].ptr[(i & 3)] =
                                dma_map_page(&oct->pci_dev->dev,
                                             frag->page.p,
                                             frag->page_offset,
                                             frag->size,
                                             DMA_TO_DEVICE);

                        if (dma_mapping_error(&oct->pci_dev->dev,
                                              g->sg[i >> 2].ptr[i & 3])) {
                                dma_unmap_single(&oct->pci_dev->dev,
                                                 g->sg[0].ptr[0],
                                                 skb->len - skb->data_len,
                                                 DMA_TO_DEVICE);
                                for (j = 1; j < i; j++) {
                                        frag = &skb_shinfo(skb)->frags[j - 1];
                                        dma_unmap_page(&oct->pci_dev->dev,
                                                       g->sg[j >> 2].ptr[j & 3],
                                                       frag->size,
                                                       DMA_TO_DEVICE);
                                }
                                dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
                                        __func__);
                                return NETDEV_TX_BUSY;
                        }

                        add_sg_size(&g->sg[(i >> 2)], frag->size, (i & 3));
                        i++;
                }

                dptr = g->sg_dma_ptr;

                if (OCTEON_CN23XX_PF(oct))
                        ndata.cmd.cmd3.dptr = dptr;
                else
                        ndata.cmd.cmd2.dptr = dptr;
                finfo->dptr = dptr;
                finfo->g = g;

                ndata.reqtype = REQTYPE_NORESP_NET_SG;
        }

        if (OCTEON_CN23XX_PF(oct)) {
                irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
                tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
        } else {
                irh = (struct octeon_instr_irh *)&ndata.cmd.cmd2.irh;
                tx_info = (union tx_info *)&ndata.cmd.cmd2.ossp[0];
        }

        if (skb_shinfo(skb)->gso_size) {
                tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
                tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
                stats->tx_gso++;
        }

        /* HW insert VLAN tag */
        if (skb_vlan_tag_present(skb)) {
                irh->priority = skb_vlan_tag_get(skb) >> 13;
                irh->vlan = skb_vlan_tag_get(skb) & 0xfff;
        }

        xmit_more = skb->xmit_more;

        if (unlikely(cmdsetup.s.timestamp))
                status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
        else
                status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
        if (status == IQ_SEND_FAILED)
                goto lio_xmit_failed;

        netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");

        if (status == IQ_SEND_STOP)
                stop_q(netdev, q_idx);

        netif_trans_update(netdev);

        if (tx_info->s.gso_segs)
                stats->tx_done += tx_info->s.gso_segs;
        else
                stats->tx_done++;
        stats->tx_tot_bytes += ndata.datasize;

        return NETDEV_TX_OK;

lio_xmit_failed:
        stats->tx_dropped++;
        netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
                   iq_no, stats->tx_dropped);
        if (dptr)
                dma_unmap_single(&oct->pci_dev->dev, dptr,
                                 ndata.datasize, DMA_TO_DEVICE);

        octeon_ring_doorbell_locked(oct, iq_no);

        tx_buffer_free(skb);
        return NETDEV_TX_OK;
}

/** \brief Network device Tx timeout
 * @param netdev    pointer to network device
 */
static void liquidio_tx_timeout(struct net_device *netdev)
{
        struct lio *lio;

        lio = GET_LIO(netdev);

        netif_info(lio, tx_err, lio->netdev,
                   "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
                   netdev->stats.tx_dropped);
        netif_trans_update(netdev);
        txqs_wake(netdev);
}

static int liquidio_vlan_rx_add_vid(struct net_device *netdev,
                                    __be16 proto __attribute__((unused)),
                                    u16 vid)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        int ret = 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
        nctrl.ncmd.s.param1 = vid;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.wait_time = 100;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
                        ret);
        }

        return ret;
}

static int liquidio_vlan_rx_kill_vid(struct net_device *netdev,
                                     __be16 proto __attribute__((unused)),
                                     u16 vid)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        int ret = 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
        nctrl.ncmd.s.param1 = vid;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.wait_time = 100;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
                        ret);
        }
        return ret;
}

/** Sending command to enable/disable RX checksum offload
 * @param netdev                pointer to network device
 * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
 * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
 *                              OCTNET_CMD_RXCSUM_DISABLE
 * @returns                     SUCCESS or FAILURE
 */
static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
                                       u8 rx_cmd)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        int ret = 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = command;
        nctrl.ncmd.s.param1 = rx_cmd;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.wait_time = 100;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev,
                        "DEVFLAGS RXCSUM change failed in core(ret:0x%x)\n",
                        ret);
        }
        return ret;
}

/** Sending command to add/delete VxLAN UDP port to firmware
 * @param netdev                pointer to network device
 * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
 * @param vxlan_port            VxLAN port to be added or deleted
 * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
 *                              OCTNET_CMD_VXLAN_PORT_DEL
 * @returns                     SUCCESS or FAILURE
 */
static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
                                       u16 vxlan_port, u8 vxlan_cmd_bit)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        int ret = 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = command;
        nctrl.ncmd.s.more = vxlan_cmd_bit;
        nctrl.ncmd.s.param1 = vxlan_port;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.wait_time = 100;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;

        ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
        if (ret < 0) {
                dev_err(&oct->pci_dev->dev,
                        "VxLAN port add/delete failed in core (ret:0x%x)\n",
                        ret);
        }
        return ret;
}

/** \brief Net device fix features
 * @param netdev  pointer to network device
 * @param request features requested
 * @returns updated features list
 */
static netdev_features_t liquidio_fix_features(struct net_device *netdev,
                                               netdev_features_t request)
{
        struct lio *lio = netdev_priv(netdev);

        if ((request & NETIF_F_RXCSUM) &&
            !(lio->dev_capability & NETIF_F_RXCSUM))
                request &= ~NETIF_F_RXCSUM;

        if ((request & NETIF_F_HW_CSUM) &&
            !(lio->dev_capability & NETIF_F_HW_CSUM))
                request &= ~NETIF_F_HW_CSUM;

        if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
                request &= ~NETIF_F_TSO;

        if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
                request &= ~NETIF_F_TSO6;

        if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
                request &= ~NETIF_F_LRO;

        /*Disable LRO if RXCSUM is off */
        if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
            (lio->dev_capability & NETIF_F_LRO))
                request &= ~NETIF_F_LRO;

        if ((request & NETIF_F_HW_VLAN_CTAG_FILTER) &&
            !(lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER))
                request &= ~NETIF_F_HW_VLAN_CTAG_FILTER;

        return request;
}

/** \brief Net device set features
 * @param netdev  pointer to network device
 * @param features features to enable/disable
 */
static int liquidio_set_features(struct net_device *netdev,
                                 netdev_features_t features)
{
        struct lio *lio = netdev_priv(netdev);

        if ((features & NETIF_F_LRO) &&
            (lio->dev_capability & NETIF_F_LRO) &&
            !(netdev->features & NETIF_F_LRO))
                liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
                                     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
        else if (!(features & NETIF_F_LRO) &&
                 (lio->dev_capability & NETIF_F_LRO) &&
                 (netdev->features & NETIF_F_LRO))
                liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
                                     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);

        /* Sending command to firmware to enable/disable RX checksum
         * offload settings using ethtool
         */
        if (!(netdev->features & NETIF_F_RXCSUM) &&
            (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
            (features & NETIF_F_RXCSUM))
                liquidio_set_rxcsum_command(netdev,
                                            OCTNET_CMD_TNL_RX_CSUM_CTL,
                                            OCTNET_CMD_RXCSUM_ENABLE);
        else if ((netdev->features & NETIF_F_RXCSUM) &&
                 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
                 !(features & NETIF_F_RXCSUM))
                liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
                                            OCTNET_CMD_RXCSUM_DISABLE);

        if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
            (lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER) &&
            !(netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
                liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
                                     OCTNET_CMD_VLAN_FILTER_ENABLE);
        else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
                 (lio->dev_capability & NETIF_F_HW_VLAN_CTAG_FILTER) &&
                 (netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
                liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
                                     OCTNET_CMD_VLAN_FILTER_DISABLE);

        return 0;
}

static void liquidio_add_vxlan_port(struct net_device *netdev,
                                    struct udp_tunnel_info *ti)
{
        if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
                return;

        liquidio_vxlan_port_command(netdev,
                                    OCTNET_CMD_VXLAN_PORT_CONFIG,
                                    htons(ti->port),
                                    OCTNET_CMD_VXLAN_PORT_ADD);
}

static void liquidio_del_vxlan_port(struct net_device *netdev,
                                    struct udp_tunnel_info *ti)
{
        if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
                return;

        liquidio_vxlan_port_command(netdev,
                                    OCTNET_CMD_VXLAN_PORT_CONFIG,
                                    htons(ti->port),
                                    OCTNET_CMD_VXLAN_PORT_DEL);
}

static int __liquidio_set_vf_mac(struct net_device *netdev, int vfidx,
                                 u8 *mac, bool is_admin_assigned)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;

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

        if (vfidx < 0 || vfidx >= oct->sriov_info.max_vfs)
                return -EINVAL;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        nctrl.ncmd.u64 = 0;
        nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
        /* vfidx is 0 based, but vf_num (param1) is 1 based */
        nctrl.ncmd.s.param1 = vfidx + 1;
        nctrl.ncmd.s.param2 = (is_admin_assigned ? 1 : 0);
        nctrl.ncmd.s.more = 1;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.netpndev = (u64)netdev;
        nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
        nctrl.wait_time = LIO_CMD_WAIT_TM;

        nctrl.udd[0] = 0;
        /* The MAC Address is presented in network byte order. */
        ether_addr_copy((u8 *)&nctrl.udd[0] + 2, mac);

        oct->sriov_info.vf_macaddr[vfidx] = nctrl.udd[0];

        octnet_send_nic_ctrl_pkt(oct, &nctrl);

        return 0;
}

static int liquidio_set_vf_mac(struct net_device *netdev, int vfidx, u8 *mac)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        int retval;

        if (vfidx < 0 || vfidx >= oct->sriov_info.num_vfs_alloced)
                return -EINVAL;

        retval = __liquidio_set_vf_mac(netdev, vfidx, mac, true);
        if (!retval)
                cn23xx_tell_vf_its_macaddr_changed(oct, vfidx, mac);

        return retval;
}

static int liquidio_set_vf_vlan(struct net_device *netdev, int vfidx,
                                u16 vlan, u8 qos, __be16 vlan_proto)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;
        u16 vlantci;

        if (vfidx < 0 || vfidx >= oct->sriov_info.num_vfs_alloced)
                return -EINVAL;

        if (vlan_proto != htons(ETH_P_8021Q))
                return -EPROTONOSUPPORT;

        if (vlan >= VLAN_N_VID || qos > 7)
                return -EINVAL;

        if (vlan)
                vlantci = vlan | (u16)qos << VLAN_PRIO_SHIFT;
        else
                vlantci = 0;

        if (oct->sriov_info.vf_vlantci[vfidx] == vlantci)
                return 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));

        if (vlan)
                nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
        else
                nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;

        nctrl.ncmd.s.param1 = vlantci;
        nctrl.ncmd.s.param2 =
            vfidx + 1; /* vfidx is 0 based, but vf_num (param2) is 1 based */
        nctrl.ncmd.s.more = 0;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.cb_fn = 0;
        nctrl.wait_time = LIO_CMD_WAIT_TM;

        octnet_send_nic_ctrl_pkt(oct, &nctrl);

        oct->sriov_info.vf_vlantci[vfidx] = vlantci;

        return 0;
}

static int liquidio_get_vf_config(struct net_device *netdev, int vfidx,
                                  struct ifla_vf_info *ivi)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        u8 *macaddr;

        if (vfidx < 0 || vfidx >= oct->sriov_info.num_vfs_alloced)
                return -EINVAL;

        ivi->vf = vfidx;
        macaddr = 2 + (u8 *)&oct->sriov_info.vf_macaddr[vfidx];
        ether_addr_copy(&ivi->mac[0], macaddr);
        ivi->vlan = oct->sriov_info.vf_vlantci[vfidx] & VLAN_VID_MASK;
        ivi->qos = oct->sriov_info.vf_vlantci[vfidx] >> VLAN_PRIO_SHIFT;
        ivi->linkstate = oct->sriov_info.vf_linkstate[vfidx];
        return 0;
}

static int liquidio_set_vf_link_state(struct net_device *netdev, int vfidx,
                                      int linkstate)
{
        struct lio *lio = GET_LIO(netdev);
        struct octeon_device *oct = lio->oct_dev;
        struct octnic_ctrl_pkt nctrl;

        if (vfidx < 0 || vfidx >= oct->sriov_info.num_vfs_alloced)
                return -EINVAL;

        if (oct->sriov_info.vf_linkstate[vfidx] == linkstate)
                return 0;

        memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
        nctrl.ncmd.s.cmd = OCTNET_CMD_SET_VF_LINKSTATE;
        nctrl.ncmd.s.param1 =
            vfidx + 1; /* vfidx is 0 based, but vf_num (param1) is 1 based */
        nctrl.ncmd.s.param2 = linkstate;
        nctrl.ncmd.s.more = 0;
        nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
        nctrl.cb_fn = 0;
        nctrl.wait_time = LIO_CMD_WAIT_TM;

        octnet_send_nic_ctrl_pkt(oct, &nctrl);

        oct->sriov_info.vf_linkstate[vfidx] = linkstate;

        return 0;
}

static int
liquidio_eswitch_mode_get(struct devlink *devlink, u16 *mode)
{
        struct lio_devlink_priv *priv;
        struct octeon_device *oct;

        priv = devlink_priv(devlink);
        oct = priv->oct;

        *mode = oct->eswitch_mode;

        return 0;
}

static int
liquidio_eswitch_mode_set(struct devlink *devlink, u16 mode)
{
        struct lio_devlink_priv *priv;
        struct octeon_device *oct;
        int ret = 0;

        priv = devlink_priv(devlink);
        oct = priv->oct;

        if (!(oct->fw_info.app_cap_flags & LIQUIDIO_SWITCHDEV_CAP))
                return -EINVAL;

        if (oct->eswitch_mode == mode)
                return 0;

        switch (mode) {
        case DEVLINK_ESWITCH_MODE_SWITCHDEV:
                oct->eswitch_mode = mode;
                ret = lio_vf_rep_create(oct);
                break;

        case DEVLINK_ESWITCH_MODE_LEGACY:
                lio_vf_rep_destroy(oct);
                oct->eswitch_mode = mode;
                break;

        default:
                ret = -EINVAL;
        }

        return ret;
}

static const struct devlink_ops liquidio_devlink_ops = {
        .eswitch_mode_get = liquidio_eswitch_mode_get,
        .eswitch_mode_set = liquidio_eswitch_mode_set,
};

static int
lio_pf_switchdev_attr_get(struct net_device *dev, struct switchdev_attr *attr)
{
        struct lio *lio = GET_LIO(dev);
        struct octeon_device *oct = lio->oct_dev;

        if (oct->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
                return -EOPNOTSUPP;

        switch (attr->id) {
        case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
                attr->u.ppid.id_len = ETH_ALEN;
                ether_addr_copy(attr->u.ppid.id,
                                (void *)&lio->linfo.hw_addr + 2);
                break;

        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

static const struct switchdev_ops lio_pf_switchdev_ops = {
        .switchdev_port_attr_get = lio_pf_switchdev_attr_get,
};

static const struct net_device_ops lionetdevops = {
        .ndo_open               = liquidio_open,
        .ndo_stop               = liquidio_stop,
        .ndo_start_xmit         = liquidio_xmit,
        .ndo_get_stats          = liquidio_get_stats,
        .ndo_set_mac_address    = liquidio_set_mac,
        .ndo_set_rx_mode        = liquidio_set_mcast_list,
        .ndo_tx_timeout         = liquidio_tx_timeout,

        .ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
        .ndo_change_mtu         = liquidio_change_mtu,
        .ndo_do_ioctl           = liquidio_ioctl,
        .ndo_fix_features       = liquidio_fix_features,
        .ndo_set_features       = liquidio_set_features,
        .ndo_udp_tunnel_add     = liquidio_add_vxlan_port,
        .ndo_udp_tunnel_del     = liquidio_del_vxlan_port,
        .ndo_set_vf_mac         = liquidio_set_vf_mac,
        .ndo_set_vf_vlan        = liquidio_set_vf_vlan,
        .ndo_get_vf_config      = liquidio_get_vf_config,
        .ndo_set_vf_link_state  = liquidio_set_vf_link_state,
};

/** \brief Entry point for the liquidio module
 */
static int __init liquidio_init(void)
{
        int i;
        struct handshake *hs;

        init_completion(&first_stage);

        octeon_init_device_list(OCTEON_CONFIG_TYPE_DEFAULT);

        if (liquidio_init_pci())
                return -EINVAL;

        wait_for_completion_timeout(&first_stage, msecs_to_jiffies(1000));

        for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
                hs = &handshake[i];
                if (hs->pci_dev) {
                        wait_for_completion(&hs->init);
                        if (!hs->init_ok) {
                                /* init handshake failed */
                                dev_err(&hs->pci_dev->dev,
                                        "Failed to init device\n");
                                liquidio_deinit_pci();
                                return -EIO;
                        }
                }
        }

        for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
                hs = &handshake[i];
                if (hs->pci_dev) {
                        wait_for_completion_timeout(&hs->started,
                                                    msecs_to_jiffies(30000));
                        if (!hs->started_ok) {
                                /* starter handshake failed */
                                dev_err(&hs->pci_dev->dev,
                                        "Firmware failed to start\n");
                                liquidio_deinit_pci();
                                return -EIO;
                        }
                }
        }

        return 0;
}

static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
{
        struct octeon_device *oct = (struct octeon_device *)buf;
        struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
        int gmxport = 0;
        union oct_link_status *ls;
        int i;

        if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
                dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
                        recv_pkt->buffer_size[0],
                        recv_pkt->rh.r_nic_info.gmxport);
                goto nic_info_err;
        }

        gmxport = recv_pkt->rh.r_nic_info.gmxport;
        ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
                OCT_DROQ_INFO_SIZE);

        octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
        for (i = 0; i < oct->ifcount; i++) {
                if (oct->props[i].gmxport == gmxport) {
                        update_link_status(oct->props[i].netdev, ls);
                        break;
                }
        }

nic_info_err:
        for (i = 0; i < recv_pkt->buffer_count; i++)
                recv_buffer_free(recv_pkt->buffer_ptr[i]);
        octeon_free_recv_info(recv_info);
        return 0;
}

/**
 * \brief Setup network interfaces
 * @param octeon_dev  octeon device
 *
 * Called during init time for each device. It assumes the NIC
 * is already up and running.  The link information for each
 * interface is passed in link_info.
 */
static int setup_nic_devices(struct octeon_device *octeon_dev)
{
        struct lio *lio = NULL;
        struct net_device *netdev;
        u8 mac[6], i, j, *fw_ver;
        struct octeon_soft_command *sc;
        struct liquidio_if_cfg_context *ctx;
        struct liquidio_if_cfg_resp *resp;
        struct octdev_props *props;
        int retval, num_iqueues, num_oqueues;
        union oct_nic_if_cfg if_cfg;
        unsigned int base_queue;
        unsigned int gmx_port_id;
        u32 resp_size, ctx_size, data_size;
        u32 ifidx_or_pfnum;
        struct lio_version *vdata;
        struct devlink *devlink;
        struct lio_devlink_priv *lio_devlink;

        /* This is to handle link status changes */
        octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
                                    OPCODE_NIC_INFO,
                                    lio_nic_info, octeon_dev);

        /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
         * They are handled directly.
         */
        octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
                                        free_netbuf);

        octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
                                        free_netsgbuf);

        octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
                                        free_netsgbuf_with_resp);

        for (i = 0; i < octeon_dev->ifcount; i++) {
                resp_size = sizeof(struct liquidio_if_cfg_resp);
                ctx_size = sizeof(struct liquidio_if_cfg_context);
                data_size = sizeof(struct lio_version);
                sc = (struct octeon_soft_command *)
                        octeon_alloc_soft_command(octeon_dev, data_size,
                                                  resp_size, ctx_size);
                resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
                ctx  = (struct liquidio_if_cfg_context *)sc->ctxptr;
                vdata = (struct lio_version *)sc->virtdptr;

                *((u64 *)vdata) = 0;
                vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
                vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
                vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);

                if (OCTEON_CN23XX_PF(octeon_dev)) {
                        num_iqueues = octeon_dev->sriov_info.num_pf_rings;
                        num_oqueues = octeon_dev->sriov_info.num_pf_rings;
                        base_queue = octeon_dev->sriov_info.pf_srn;

                        gmx_port_id = octeon_dev->pf_num;
                        ifidx_or_pfnum = octeon_dev->pf_num;
                } else {
                        num_iqueues = CFG_GET_NUM_TXQS_NIC_IF(
                                                octeon_get_conf(octeon_dev), i);
                        num_oqueues = CFG_GET_NUM_RXQS_NIC_IF(
                                                octeon_get_conf(octeon_dev), i);
                        base_queue = CFG_GET_BASE_QUE_NIC_IF(
                                                octeon_get_conf(octeon_dev), i);
                        gmx_port_id = CFG_GET_GMXID_NIC_IF(
                                                octeon_get_conf(octeon_dev), i);
                        ifidx_or_pfnum = i;
                }

                dev_dbg(&octeon_dev->pci_dev->dev,
                        "requesting config for interface %d, iqs %d, oqs %d\n",
                        ifidx_or_pfnum, num_iqueues, num_oqueues);
                WRITE_ONCE(ctx->cond, 0);
                ctx->octeon_id = lio_get_device_id(octeon_dev);
                init_waitqueue_head(&ctx->wc);

                if_cfg.u64 = 0;
                if_cfg.s.num_iqueues = num_iqueues;
                if_cfg.s.num_oqueues = num_oqueues;
                if_cfg.s.base_queue = base_queue;
                if_cfg.s.gmx_port_id = gmx_port_id;

                sc->iq_no = 0;

                octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
                                            OPCODE_NIC_IF_CFG, 0,
                                            if_cfg.u64, 0);

                sc->callback = if_cfg_callback;
                sc->callback_arg = sc;
                sc->wait_time = 3000;

                retval = octeon_send_soft_command(octeon_dev, sc);
                if (retval == IQ_SEND_FAILED) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "iq/oq config failed status: %x\n",
                                retval);
                        /* Soft instr is freed by driver in case of failure. */
                        goto setup_nic_dev_fail;
                }

                /* Sleep on a wait queue till the cond flag indicates that the
                 * response arrived or timed-out.
                 */
                if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR) {
                        dev_err(&octeon_dev->pci_dev->dev, "Wait interrupted\n");
                        goto setup_nic_wait_intr;
                }

                retval = resp->status;
                if (retval) {
                        dev_err(&octeon_dev->pci_dev->dev, "iq/oq config failed\n");
                        goto setup_nic_dev_fail;
                }

                /* Verify f/w version (in case of 'auto' loading from flash) */
                fw_ver = octeon_dev->fw_info.liquidio_firmware_version;
                if (memcmp(LIQUIDIO_BASE_VERSION,
                           fw_ver,
                           strlen(LIQUIDIO_BASE_VERSION))) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "Unmatched firmware version. Expected %s.x, got %s.\n",
                                LIQUIDIO_BASE_VERSION, fw_ver);
                        goto setup_nic_dev_fail;
                } else if (atomic_read(octeon_dev->adapter_fw_state) ==
                           FW_IS_PRELOADED) {
                        dev_info(&octeon_dev->pci_dev->dev,
                                 "Using auto-loaded firmware version %s.\n",
                                 fw_ver);
                }

                octeon_swap_8B_data((u64 *)(&resp->cfg_info),
                                    (sizeof(struct liquidio_if_cfg_info)) >> 3);

                num_iqueues = hweight64(resp->cfg_info.iqmask);
                num_oqueues = hweight64(resp->cfg_info.oqmask);

                if (!(num_iqueues) || !(num_oqueues)) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
                                resp->cfg_info.iqmask,
                                resp->cfg_info.oqmask);
                        goto setup_nic_dev_fail;
                }
                dev_dbg(&octeon_dev->pci_dev->dev,
                        "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
                        i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
                        num_iqueues, num_oqueues);
                netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);

                if (!netdev) {
                        dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
                        goto setup_nic_dev_fail;
                }

                SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);

                /* Associate the routines that will handle different
                 * netdev tasks.
                 */
                netdev->netdev_ops = &lionetdevops;
                SWITCHDEV_SET_OPS(netdev, &lio_pf_switchdev_ops);

                lio = GET_LIO(netdev);

                memset(lio, 0, sizeof(struct lio));

                lio->ifidx = ifidx_or_pfnum;

                props = &octeon_dev->props[i];
                props->gmxport = resp->cfg_info.linfo.gmxport;
                props->netdev = netdev;

                lio->linfo.num_rxpciq = num_oqueues;
                lio->linfo.num_txpciq = num_iqueues;
                for (j = 0; j < num_oqueues; j++) {
                        lio->linfo.rxpciq[j].u64 =
                                resp->cfg_info.linfo.rxpciq[j].u64;
                }
                for (j = 0; j < num_iqueues; j++) {
                        lio->linfo.txpciq[j].u64 =
                                resp->cfg_info.linfo.txpciq[j].u64;
                }
                lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
                lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
                lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;

                lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);

                if (OCTEON_CN23XX_PF(octeon_dev) ||
                    OCTEON_CN6XXX(octeon_dev)) {
                        lio->dev_capability = NETIF_F_HIGHDMA
                                              | NETIF_F_IP_CSUM
                                              | NETIF_F_IPV6_CSUM
                                              | NETIF_F_SG | NETIF_F_RXCSUM
                                              | NETIF_F_GRO
                                              | NETIF_F_TSO | NETIF_F_TSO6
                                              | NETIF_F_LRO;
                }
                netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);

                /*  Copy of transmit encapsulation capabilities:
                 *  TSO, TSO6, Checksums for this device
                 */
                lio->enc_dev_capability = NETIF_F_IP_CSUM
                                          | NETIF_F_IPV6_CSUM
                                          | NETIF_F_GSO_UDP_TUNNEL
                                          | NETIF_F_HW_CSUM | NETIF_F_SG
                                          | NETIF_F_RXCSUM
                                          | NETIF_F_TSO | NETIF_F_TSO6
                                          | NETIF_F_LRO;

                netdev->hw_enc_features = (lio->enc_dev_capability &
                                           ~NETIF_F_LRO);

                lio->dev_capability |= NETIF_F_GSO_UDP_TUNNEL;

                netdev->vlan_features = lio->dev_capability;
                /* Add any unchangeable hw features */
                lio->dev_capability |=  NETIF_F_HW_VLAN_CTAG_FILTER |
                                        NETIF_F_HW_VLAN_CTAG_RX |
                                        NETIF_F_HW_VLAN_CTAG_TX;

                netdev->features = (lio->dev_capability & ~NETIF_F_LRO);

                netdev->hw_features = lio->dev_capability;
                /*HW_VLAN_RX and HW_VLAN_FILTER is always on*/
                netdev->hw_features = netdev->hw_features &
                        ~NETIF_F_HW_VLAN_CTAG_RX;

                /* MTU range: 68 - 16000 */
                netdev->min_mtu = LIO_MIN_MTU_SIZE;
                netdev->max_mtu = LIO_MAX_MTU_SIZE;

                /* Point to the  properties for octeon device to which this
                 * interface belongs.
                 */
                lio->oct_dev = octeon_dev;
                lio->octprops = props;
                lio->netdev = netdev;

                dev_dbg(&octeon_dev->pci_dev->dev,
                        "if%d gmx: %d hw_addr: 0x%llx\n", i,
                        lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));

                for (j = 0; j < octeon_dev->sriov_info.max_vfs; j++) {
                        u8 vfmac[ETH_ALEN];

                        random_ether_addr(&vfmac[0]);
                        if (__liquidio_set_vf_mac(netdev, j,
                                                  &vfmac[0], false)) {
                                dev_err(&octeon_dev->pci_dev->dev,
                                        "Error setting VF%d MAC address\n",
                                        j);
                                goto setup_nic_dev_fail;
                        }
                }

                /* 64-bit swap required on LE machines */
                octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
                for (j = 0; j < 6; j++)
                        mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));

                /* Copy MAC Address to OS network device structure */

                ether_addr_copy(netdev->dev_addr, mac);

                /* By default all interfaces on a single Octeon uses the same
                 * tx and rx queues
                 */
                lio->txq = lio->linfo.txpciq[0].s.q_no;
                lio->rxq = lio->linfo.rxpciq[0].s.q_no;
                if (liquidio_setup_io_queues(octeon_dev, i,
                                             lio->linfo.num_txpciq,
                                             lio->linfo.num_rxpciq)) {
                        dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
                        goto setup_nic_dev_fail;
                }

                ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);

                lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
                lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);

                if (setup_glists(octeon_dev, lio, num_iqueues)) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "Gather list allocation failed\n");
                        goto setup_nic_dev_fail;
                }

                /* Register ethtool support */
                liquidio_set_ethtool_ops(netdev);
                if (lio->oct_dev->chip_id == OCTEON_CN23XX_PF_VID)
                        octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
                else
                        octeon_dev->priv_flags = 0x0;

                if (netdev->features & NETIF_F_LRO)
                        liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
                                             OCTNIC_LROIPV4 | OCTNIC_LROIPV6);

                liquidio_set_feature(netdev, OCTNET_CMD_VLAN_FILTER_CTL,
                                     OCTNET_CMD_VLAN_FILTER_ENABLE);

                if ((debug != -1) && (debug & NETIF_MSG_HW))
                        liquidio_set_feature(netdev,
                                             OCTNET_CMD_VERBOSE_ENABLE, 0);

                if (setup_link_status_change_wq(netdev))
                        goto setup_nic_dev_fail;

                if ((octeon_dev->fw_info.app_cap_flags &
                     LIQUIDIO_TIME_SYNC_CAP) &&
                    setup_sync_octeon_time_wq(netdev))
                        goto setup_nic_dev_fail;

                if (setup_rx_oom_poll_fn(netdev))
                        goto setup_nic_dev_fail;

                /* Register the network device with the OS */
                if (register_netdev(netdev)) {
                        dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
                        goto setup_nic_dev_fail;
                }

                dev_dbg(&octeon_dev->pci_dev->dev,
                        "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
                        i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
                netif_carrier_off(netdev);
                lio->link_changes++;

                ifstate_set(lio, LIO_IFSTATE_REGISTERED);

                /* Sending command to firmware to enable Rx checksum offload
                 * by default at the time of setup of Liquidio driver for
                 * this device
                 */
                liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
                                            OCTNET_CMD_RXCSUM_ENABLE);
                liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
                                     OCTNET_CMD_TXCSUM_ENABLE);

                dev_dbg(&octeon_dev->pci_dev->dev,
                        "NIC ifidx:%d Setup successful\n", i);

                octeon_free_soft_command(octeon_dev, sc);
        }

        devlink = devlink_alloc(&liquidio_devlink_ops,
                                sizeof(struct lio_devlink_priv));
        if (!devlink) {
                dev_err(&octeon_dev->pci_dev->dev, "devlink alloc failed\n");
                goto setup_nic_wait_intr;
        }

        lio_devlink = devlink_priv(devlink);
        lio_devlink->oct = octeon_dev;

        if (devlink_register(devlink, &octeon_dev->pci_dev->dev)) {
                devlink_free(devlink);
                dev_err(&octeon_dev->pci_dev->dev,
                        "devlink registration failed\n");
                goto setup_nic_wait_intr;
        }

        octeon_dev->devlink = devlink;
        octeon_dev->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;

        return 0;

setup_nic_dev_fail:

        octeon_free_soft_command(octeon_dev, sc);

setup_nic_wait_intr:

        while (i--) {
                dev_err(&octeon_dev->pci_dev->dev,
                        "NIC ifidx:%d Setup failed\n", i);
                liquidio_destroy_nic_device(octeon_dev, i);
        }
        return -ENODEV;
}

#ifdef CONFIG_PCI_IOV
static int octeon_enable_sriov(struct octeon_device *oct)
{
        unsigned int num_vfs_alloced = oct->sriov_info.num_vfs_alloced;
        struct pci_dev *vfdev;
        int err;
        u32 u;

        if (OCTEON_CN23XX_PF(oct) && num_vfs_alloced) {
                err = pci_enable_sriov(oct->pci_dev,
                                       oct->sriov_info.num_vfs_alloced);
                if (err) {
                        dev_err(&oct->pci_dev->dev,
                                "OCTEON: Failed to enable PCI sriov: %d\n",
                                err);
                        oct->sriov_info.num_vfs_alloced = 0;
                        return err;
                }
                oct->sriov_info.sriov_enabled = 1;

                /* init lookup table that maps DPI ring number to VF pci_dev
                 * struct pointer
                 */
                u = 0;
                vfdev = pci_get_device(PCI_VENDOR_ID_CAVIUM,
                                       OCTEON_CN23XX_VF_VID, NULL);
                while (vfdev) {
                        if (vfdev->is_virtfn &&
                            (vfdev->physfn == oct->pci_dev)) {
                                oct->sriov_info.dpiring_to_vfpcidev_lut[u] =
                                        vfdev;
                                u += oct->sriov_info.rings_per_vf;
                        }
                        vfdev = pci_get_device(PCI_VENDOR_ID_CAVIUM,
                                               OCTEON_CN23XX_VF_VID, vfdev);
                }
        }

        return num_vfs_alloced;
}

static int lio_pci_sriov_disable(struct octeon_device *oct)
{
        int u;

        if (pci_vfs_assigned(oct->pci_dev)) {
                dev_err(&oct->pci_dev->dev, "VFs are still assigned to VMs.\n");
                return -EPERM;
        }

        pci_disable_sriov(oct->pci_dev);

        u = 0;
        while (u < MAX_POSSIBLE_VFS) {
                oct->sriov_info.dpiring_to_vfpcidev_lut[u] = NULL;
                u += oct->sriov_info.rings_per_vf;
        }

        oct->sriov_info.num_vfs_alloced = 0;
        dev_info(&oct->pci_dev->dev, "oct->pf_num:%d disabled VFs\n",
                 oct->pf_num);

        return 0;
}

static int liquidio_enable_sriov(struct pci_dev *dev, int num_vfs)
{
        struct octeon_device *oct = pci_get_drvdata(dev);
        int ret = 0;

        if ((num_vfs == oct->sriov_info.num_vfs_alloced) &&
            (oct->sriov_info.sriov_enabled)) {
                dev_info(&oct->pci_dev->dev, "oct->pf_num:%d already enabled num_vfs:%d\n",
                         oct->pf_num, num_vfs);
                return 0;
        }

        if (!num_vfs) {
                lio_vf_rep_destroy(oct);
                ret = lio_pci_sriov_disable(oct);
        } else if (num_vfs > oct->sriov_info.max_vfs) {
                dev_err(&oct->pci_dev->dev,
                        "OCTEON: Max allowed VFs:%d user requested:%d",
                        oct->sriov_info.max_vfs, num_vfs);
                ret = -EPERM;
        } else {
                oct->sriov_info.num_vfs_alloced = num_vfs;
                ret = octeon_enable_sriov(oct);
                dev_info(&oct->pci_dev->dev, "oct->pf_num:%d num_vfs:%d\n",
                         oct->pf_num, num_vfs);
                ret = lio_vf_rep_create(oct);
                if (ret)
                        dev_info(&oct->pci_dev->dev,
                                 "vf representor create failed");
        }

        return ret;
}
#endif

/**
 * \brief initialize the NIC
 * @param oct octeon device
 *
 * This initialization routine is called once the Octeon device application is
 * up and running
 */
static int liquidio_init_nic_module(struct octeon_device *oct)
{
        int i, retval = 0;
        int num_nic_ports = CFG_GET_NUM_NIC_PORTS(octeon_get_conf(oct));

        dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");

        /* only default iq and oq were initialized
         * initialize the rest as well
         */
        /* run port_config command for each port */
        oct->ifcount = num_nic_ports;

        memset(oct->props, 0, sizeof(struct octdev_props) * num_nic_ports);

        for (i = 0; i < MAX_OCTEON_LINKS; i++)
                oct->props[i].gmxport = -1;

        retval = setup_nic_devices(oct);
        if (retval) {
                dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
                goto octnet_init_failure;
        }

        /* Call vf_rep_modinit if the firmware is switchdev capable
         * and do it from the first liquidio function probed.
         */
        if (!oct->octeon_id &&
            oct->fw_info.app_cap_flags & LIQUIDIO_SWITCHDEV_CAP) {
                retval = lio_vf_rep_modinit();
                if (retval) {
                        liquidio_stop_nic_module(oct);
                        goto octnet_init_failure;
                }
        }

        liquidio_ptp_init(oct);

        dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");

        return retval;

octnet_init_failure:

        oct->ifcount = 0;

        return retval;
}

/**
 * \brief starter callback that invokes the remaining initialization work after
 * the NIC is up and running.
 * @param octptr  work struct work_struct
 */
static void nic_starter(struct work_struct *work)
{
        struct octeon_device *oct;
        struct cavium_wk *wk = (struct cavium_wk *)work;

        oct = (struct octeon_device *)wk->ctxptr;

        if (atomic_read(&oct->status) == OCT_DEV_RUNNING)
                return;

        /* If the status of the device is CORE_OK, the core
         * application has reported its application type. Call
         * any registered handlers now and move to the RUNNING
         * state.
         */
        if (atomic_read(&oct->status) != OCT_DEV_CORE_OK) {
                schedule_delayed_work(&oct->nic_poll_work.work,
                                      LIQUIDIO_STARTER_POLL_INTERVAL_MS);
                return;
        }

        atomic_set(&oct->status, OCT_DEV_RUNNING);

        if (oct->app_mode && oct->app_mode == CVM_DRV_NIC_APP) {
                dev_dbg(&oct->pci_dev->dev, "Starting NIC module\n");

                if (liquidio_init_nic_module(oct))
                        dev_err(&oct->pci_dev->dev, "NIC initialization failed\n");
                else
                        handshake[oct->octeon_id].started_ok = 1;
        } else {
                dev_err(&oct->pci_dev->dev,
                        "Unexpected application running on NIC (%d). Check firmware.\n",
                        oct->app_mode);
        }

        complete(&handshake[oct->octeon_id].started);
}

static int
octeon_recv_vf_drv_notice(struct octeon_recv_info *recv_info, void *buf)
{
        struct octeon_device *oct = (struct octeon_device *)buf;
        struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
        int i, notice, vf_idx;
        bool cores_crashed;
        u64 *data, vf_num;

        notice = recv_pkt->rh.r.ossp;
        data = (u64 *)(get_rbd(recv_pkt->buffer_ptr[0]) + OCT_DROQ_INFO_SIZE);

        /* the first 64-bit word of data is the vf_num */
        vf_num = data[0];
        octeon_swap_8B_data(&vf_num, 1);
        vf_idx = (int)vf_num - 1;

        cores_crashed = READ_ONCE(oct->cores_crashed);

        if (notice == VF_DRV_LOADED) {
                if (!(oct->sriov_info.vf_drv_loaded_mask & BIT_ULL(vf_idx))) {
                        oct->sriov_info.vf_drv_loaded_mask |= BIT_ULL(vf_idx);
                        dev_info(&oct->pci_dev->dev,
                                 "driver for VF%d was loaded\n", vf_idx);
                        if (!cores_crashed)
                                try_module_get(THIS_MODULE);
                }
        } else if (notice == VF_DRV_REMOVED) {
                if (oct->sriov_info.vf_drv_loaded_mask & BIT_ULL(vf_idx)) {
                        oct->sriov_info.vf_drv_loaded_mask &= ~BIT_ULL(vf_idx);
                        dev_info(&oct->pci_dev->dev,
                                 "driver for VF%d was removed\n", vf_idx);
                        if (!cores_crashed)
                                module_put(THIS_MODULE);
                }
        } else if (notice == VF_DRV_MACADDR_CHANGED) {
                u8 *b = (u8 *)&data[1];

                oct->sriov_info.vf_macaddr[vf_idx] = data[1];
                dev_info(&oct->pci_dev->dev,
                         "VF driver changed VF%d's MAC address to %pM\n",
                         vf_idx, b + 2);
        }

        for (i = 0; i < recv_pkt->buffer_count; i++)
                recv_buffer_free(recv_pkt->buffer_ptr[i]);
        octeon_free_recv_info(recv_info);

        return 0;
}

/**
 * \brief Device initialization for each Octeon device that is probed
 * @param octeon_dev  octeon device
 */
static int octeon_device_init(struct octeon_device *octeon_dev)
{
        int j, ret;
        char bootcmd[] = "\n";
        char *dbg_enb = NULL;
        enum lio_fw_state fw_state;
        struct octeon_device_priv *oct_priv =
                (struct octeon_device_priv *)octeon_dev->priv;
        atomic_set(&octeon_dev->status, OCT_DEV_BEGIN_STATE);

        /* Enable access to the octeon device and make its DMA capability
         * known to the OS.
         */
        if (octeon_pci_os_setup(octeon_dev))
                return 1;

        atomic_set(&octeon_dev->status, OCT_DEV_PCI_ENABLE_DONE);

        /* Identify the Octeon type and map the BAR address space. */
        if (octeon_chip_specific_setup(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev, "Chip specific setup failed\n");
                return 1;
        }

        atomic_set(&octeon_dev->status, OCT_DEV_PCI_MAP_DONE);

        /* Only add a reference after setting status 'OCT_DEV_PCI_MAP_DONE',
         * since that is what is required for the reference to be removed
         * during de-initialization (see 'octeon_destroy_resources').
         */
        octeon_register_device(octeon_dev, octeon_dev->pci_dev->bus->number,
                               PCI_SLOT(octeon_dev->pci_dev->devfn),
                               PCI_FUNC(octeon_dev->pci_dev->devfn),
                               true);

        octeon_dev->app_mode = CVM_DRV_INVALID_APP;

        /* CN23XX supports preloaded firmware if the following is true:
         *
         * The adapter indicates that firmware is currently running AND
         * 'fw_type' is 'auto'.
         *
         * (default state is NEEDS_TO_BE_LOADED, override it if appropriate).
         */
        if (OCTEON_CN23XX_PF(octeon_dev) &&
            cn23xx_fw_loaded(octeon_dev) && fw_type_is_auto()) {
                atomic_cmpxchg(octeon_dev->adapter_fw_state,
                               FW_NEEDS_TO_BE_LOADED, FW_IS_PRELOADED);
        }

        /* If loading firmware, only first device of adapter needs to do so. */
        fw_state = atomic_cmpxchg(octeon_dev->adapter_fw_state,
                                  FW_NEEDS_TO_BE_LOADED,
                                  FW_IS_BEING_LOADED);

        /* Here, [local variable] 'fw_state' is set to one of:
         *
         *   FW_IS_PRELOADED:       No firmware is to be loaded (see above)
         *   FW_NEEDS_TO_BE_LOADED: The driver's first instance will load
         *                          firmware to the adapter.
         *   FW_IS_BEING_LOADED:    The driver's second instance will not load
         *                          firmware to the adapter.
         */

        /* Prior to f/w load, perform a soft reset of the Octeon device;
         * if error resetting, return w/error.
         */
        if (fw_state == FW_NEEDS_TO_BE_LOADED)
                if (octeon_dev->fn_list.soft_reset(octeon_dev))
                        return 1;

        /* Initialize the dispatch mechanism used to push packets arriving on
         * Octeon Output queues.
         */
        if (octeon_init_dispatch_list(octeon_dev))
                return 1;

        octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
                                    OPCODE_NIC_CORE_DRV_ACTIVE,
                                    octeon_core_drv_init,
                                    octeon_dev);

        octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
                                    OPCODE_NIC_VF_DRV_NOTICE,
                                    octeon_recv_vf_drv_notice, octeon_dev);
        INIT_DELAYED_WORK(&octeon_dev->nic_poll_work.work, nic_starter);
        octeon_dev->nic_poll_work.ctxptr = (void *)octeon_dev;
        schedule_delayed_work(&octeon_dev->nic_poll_work.work,
                              LIQUIDIO_STARTER_POLL_INTERVAL_MS);

        atomic_set(&octeon_dev->status, OCT_DEV_DISPATCH_INIT_DONE);

        if (octeon_set_io_queues_off(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev, "setting io queues off failed\n");
                return 1;
        }

        if (OCTEON_CN23XX_PF(octeon_dev)) {
                ret = octeon_dev->fn_list.setup_device_regs(octeon_dev);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev, "OCTEON: Failed to configure device registers\n");
                        return ret;
                }
        }

        /* Initialize soft command buffer pool
         */
        if (octeon_setup_sc_buffer_pool(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev, "sc buffer pool allocation failed\n");
                return 1;
        }
        atomic_set(&octeon_dev->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);

        /*  Setup the data structures that manage this Octeon's Input queues. */
        if (octeon_setup_instr_queues(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev,
                        "instruction queue initialization failed\n");
                return 1;
        }
        atomic_set(&octeon_dev->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);

        /* Initialize lists to manage the requests of different types that
         * arrive from user & kernel applications for this octeon device.
         */
        if (octeon_setup_response_list(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev, "Response list allocation failed\n");
                return 1;
        }
        atomic_set(&octeon_dev->status, OCT_DEV_RESP_LIST_INIT_DONE);

        if (octeon_setup_output_queues(octeon_dev)) {
                dev_err(&octeon_dev->pci_dev->dev, "Output queue initialization failed\n");
                return 1;
        }

        atomic_set(&octeon_dev->status, OCT_DEV_DROQ_INIT_DONE);

        if (OCTEON_CN23XX_PF(octeon_dev)) {
                if (octeon_dev->fn_list.setup_mbox(octeon_dev)) {
                        dev_err(&octeon_dev->pci_dev->dev, "OCTEON: Mailbox setup failed\n");
                        return 1;
                }
                atomic_set(&octeon_dev->status, OCT_DEV_MBOX_SETUP_DONE);

                if (octeon_allocate_ioq_vector(octeon_dev)) {
                        dev_err(&octeon_dev->pci_dev->dev, "OCTEON: ioq vector allocation failed\n");
                        return 1;
                }
                atomic_set(&octeon_dev->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);

        } else {
                /* The input and output queue registers were setup earlier (the
                 * queues were not enabled). Any additional registers
                 * that need to be programmed should be done now.
                 */
                ret = octeon_dev->fn_list.setup_device_regs(octeon_dev);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "Failed to configure device registers\n");
                        return ret;
                }
        }

        /* Initialize the tasklet that handles output queue packet processing.*/
        dev_dbg(&octeon_dev->pci_dev->dev, "Initializing droq tasklet\n");
        tasklet_init(&oct_priv->droq_tasklet, octeon_droq_bh,
                     (unsigned long)octeon_dev);

        /* Setup the interrupt handler and record the INT SUM register address
         */
        if (octeon_setup_interrupt(octeon_dev,
                                   octeon_dev->sriov_info.num_pf_rings))
                return 1;

        /* Enable Octeon device interrupts */
        octeon_dev->fn_list.enable_interrupt(octeon_dev, OCTEON_ALL_INTR);

        atomic_set(&octeon_dev->status, OCT_DEV_INTR_SET_DONE);

        /* Send Credit for Octeon Output queues. Credits are always sent BEFORE
         * the output queue is enabled.
         * This ensures that we'll receive the f/w CORE DRV_ACTIVE message in
         * case we've configured CN23XX_SLI_GBL_CONTROL[NOPTR_D] = 0.
         * Otherwise, it is possible that the DRV_ACTIVE message will be sent
         * before any credits have been issued, causing the ring to be reset
         * (and the f/w appear to never have started).
         */
        for (j = 0; j < octeon_dev->num_oqs; j++)
                writel(octeon_dev->droq[j]->max_count,
                       octeon_dev->droq[j]->pkts_credit_reg);

        /* Enable the input and output queues for this Octeon device */
        ret = octeon_dev->fn_list.enable_io_queues(octeon_dev);
        if (ret) {
                dev_err(&octeon_dev->pci_dev->dev, "Failed to enable input/output queues");
                return ret;
        }

        atomic_set(&octeon_dev->status, OCT_DEV_IO_QUEUES_DONE);

        if (fw_state == FW_NEEDS_TO_BE_LOADED) {
                dev_dbg(&octeon_dev->pci_dev->dev, "Waiting for DDR initialization...\n");
                if (!ddr_timeout) {
                        dev_info(&octeon_dev->pci_dev->dev,
                                 "WAITING. Set ddr_timeout to non-zero value to proceed with initialization.\n");
                }

                schedule_timeout_uninterruptible(HZ * LIO_RESET_SECS);

                /* Wait for the octeon to initialize DDR after the soft-reset.*/
                while (!ddr_timeout) {
                        set_current_state(TASK_INTERRUPTIBLE);
                        if (schedule_timeout(HZ / 10)) {
                                /* user probably pressed Control-C */
                                return 1;
                        }
                }
                ret = octeon_wait_for_ddr_init(octeon_dev, &ddr_timeout);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev,
                                "DDR not initialized. Please confirm that board is configured to boot from Flash, ret: %d\n",
                                ret);
                        return 1;
                }

                if (octeon_wait_for_bootloader(octeon_dev, 1000)) {
                        dev_err(&octeon_dev->pci_dev->dev, "Board not responding\n");
                        return 1;
                }

                /* Divert uboot to take commands from host instead. */
                ret = octeon_console_send_cmd(octeon_dev, bootcmd, 50);

                dev_dbg(&octeon_dev->pci_dev->dev, "Initializing consoles\n");
                ret = octeon_init_consoles(octeon_dev);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev, "Could not access board consoles\n");
                        return 1;
                }
                /* If console debug enabled, specify empty string to use default
                 * enablement ELSE specify NULL string for 'disabled'.
                 */
                dbg_enb = octeon_console_debug_enabled(0) ? "" : NULL;
                ret = octeon_add_console(octeon_dev, 0, dbg_enb);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev, "Could not access board console\n");
                        return 1;
                } else if (octeon_console_debug_enabled(0)) {
                        /* If console was added AND we're logging console output
                         * then set our console print function.
                         */
                        octeon_dev->console[0].print = octeon_dbg_console_print;
                }

                atomic_set(&octeon_dev->status, OCT_DEV_CONSOLE_INIT_DONE);

                dev_dbg(&octeon_dev->pci_dev->dev, "Loading firmware\n");
                ret = load_firmware(octeon_dev);
                if (ret) {
                        dev_err(&octeon_dev->pci_dev->dev, "Could not load firmware to board\n");
                        return 1;
                }

                atomic_set(octeon_dev->adapter_fw_state, FW_HAS_BEEN_LOADED);
        }

        handshake[octeon_dev->octeon_id].init_ok = 1;
        complete(&handshake[octeon_dev->octeon_id].init);

        atomic_set(&octeon_dev->status, OCT_DEV_HOST_OK);

        return 0;
}

/**
 * \brief Debug console print function
 * @param octeon_dev  octeon device
 * @param console_num console number
 * @param prefix      first portion of line to display
 * @param suffix      second portion of line to display
 *
 * The OCTEON debug console outputs entire lines (excluding '\n').
 * Normally, the line will be passed in the 'prefix' parameter.
 * However, due to buffering, it is possible for a line to be split into two
 * parts, in which case they will be passed as the 'prefix' parameter and
 * 'suffix' parameter.
 */
static int octeon_dbg_console_print(struct octeon_device *oct, u32 console_num,
                                    char *prefix, char *suffix)
{
        if (prefix && suffix)
                dev_info(&oct->pci_dev->dev, "%u: %s%s\n", console_num, prefix,
                         suffix);
        else if (prefix)
                dev_info(&oct->pci_dev->dev, "%u: %s\n", console_num, prefix);
        else if (suffix)
                dev_info(&oct->pci_dev->dev, "%u: %s\n", console_num, suffix);

        return 0;
}

/**
 * \brief Exits the module
 */
static void __exit liquidio_exit(void)
{
        liquidio_deinit_pci();

        pr_info("LiquidIO network module is now unloaded\n");
}

module_init(liquidio_init);
module_exit(liquidio_exit);