/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2011-2013 Qlogic Corporation
 * All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * File: qla_os.c
 * Author : David C Somayajulu, Qlogic Corporation, Aliso Viejo, CA 92656.
 */

#include <sys/cdefs.h>
#include "qla_os.h"
#include "qla_reg.h"
#include "qla_hw.h"
#include "qla_def.h"
#include "qla_inline.h"
#include "qla_ver.h"
#include "qla_glbl.h"
#include "qla_dbg.h"

/*
 * Some PCI Configuration Space Related Defines
 */

#ifndef PCI_VENDOR_QLOGIC
#define PCI_VENDOR_QLOGIC       0x1077
#endif

#ifndef PCI_PRODUCT_QLOGIC_ISP8020
#define PCI_PRODUCT_QLOGIC_ISP8020      0x8020
#endif

#define PCI_QLOGIC_ISP8020 \
        ((PCI_PRODUCT_QLOGIC_ISP8020 << 16) | PCI_VENDOR_QLOGIC)

/*
 * static functions
 */
static int qla_alloc_parent_dma_tag(qla_host_t *ha);
static void qla_free_parent_dma_tag(qla_host_t *ha);
static int qla_alloc_xmt_bufs(qla_host_t *ha);
static void qla_free_xmt_bufs(qla_host_t *ha);
static int qla_alloc_rcv_bufs(qla_host_t *ha);
static void qla_free_rcv_bufs(qla_host_t *ha);

static void qla_init_ifnet(device_t dev, qla_host_t *ha);
static int qla_sysctl_get_stats(SYSCTL_HANDLER_ARGS);
static void qla_release(qla_host_t *ha);
static void qla_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nsegs,
                int error);
static void qla_stop(qla_host_t *ha);
static int qla_send(qla_host_t *ha, struct mbuf **m_headp);
static void qla_tx_done(void *context, int pending);

/*
 * Hooks to the Operating Systems
 */
static int qla_pci_probe (device_t);
static int qla_pci_attach (device_t);
static int qla_pci_detach (device_t);

static void qla_init(void *arg);
static int qla_ioctl(if_t ifp, u_long cmd, caddr_t data);
static int qla_media_change(if_t ifp);
static void qla_media_status(if_t ifp, struct ifmediareq *ifmr);

static device_method_t qla_pci_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, qla_pci_probe),
        DEVMETHOD(device_attach, qla_pci_attach),
        DEVMETHOD(device_detach, qla_pci_detach),
        DEVMETHOD_END
};

static driver_t qla_pci_driver = {
        "ql", qla_pci_methods, sizeof (qla_host_t),
};

DRIVER_MODULE(qla80xx, pci, qla_pci_driver, 0, 0);

MODULE_DEPEND(qla80xx, pci, 1, 1, 1);
MODULE_DEPEND(qla80xx, ether, 1, 1, 1);

MALLOC_DEFINE(M_QLA8XXXBUF, "qla80xxbuf", "Buffers for qla80xx driver");

uint32_t std_replenish = 8;
uint32_t jumbo_replenish = 2;
uint32_t rcv_pkt_thres = 128;
uint32_t rcv_pkt_thres_d = 32;
uint32_t snd_pkt_thres = 16;
uint32_t free_pkt_thres = (NUM_TX_DESCRIPTORS / 2);

static char dev_str[64];

/*
 * Name:        qla_pci_probe
 * Function:    Validate the PCI device to be a QLA80XX device
 */
static int
qla_pci_probe(device_t dev)
{
        switch ((pci_get_device(dev) << 16) | (pci_get_vendor(dev))) {
        case PCI_QLOGIC_ISP8020:
                snprintf(dev_str, sizeof(dev_str), "%s v%d.%d.%d",
                        "Qlogic ISP 80xx PCI CNA Adapter-Ethernet Function",
                        QLA_VERSION_MAJOR, QLA_VERSION_MINOR,
                        QLA_VERSION_BUILD);
                device_set_desc(dev, dev_str);
                break;
        default:
                return (ENXIO);
        }

        if (bootverbose)
                printf("%s: %s\n ", __func__, dev_str);

        return (BUS_PROBE_DEFAULT);
}

static void
qla_add_sysctls(qla_host_t *ha)
{
        device_t dev = ha->pci_dev;

        SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
            OID_AUTO, "stats", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
            (void *)ha, 0, qla_sysctl_get_stats, "I", "Statistics");

        SYSCTL_ADD_STRING(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "fw_version", CTLFLAG_RD,
                ha->fw_ver_str, 0, "firmware version");

        dbg_level = 0;
        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "debug", CTLFLAG_RW,
                &dbg_level, dbg_level, "Debug Level");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "std_replenish", CTLFLAG_RW,
                &std_replenish, std_replenish,
                "Threshold for Replenishing Standard Frames");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "jumbo_replenish", CTLFLAG_RW,
                &jumbo_replenish, jumbo_replenish,
                "Threshold for Replenishing Jumbo Frames");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "rcv_pkt_thres",  CTLFLAG_RW,
                &rcv_pkt_thres, rcv_pkt_thres,
                "Threshold for # of rcv pkts to trigger indication isr");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "rcv_pkt_thres_d",  CTLFLAG_RW,
                &rcv_pkt_thres_d, rcv_pkt_thres_d,
                "Threshold for # of rcv pkts to trigger indication defered");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "snd_pkt_thres",  CTLFLAG_RW,
                &snd_pkt_thres, snd_pkt_thres,
                "Threshold for # of snd packets");

        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                OID_AUTO, "free_pkt_thres",  CTLFLAG_RW,
                &free_pkt_thres, free_pkt_thres,
                "Threshold for # of packets to free at a time");

        return;
}

static void
qla_watchdog(void *arg)
{
        qla_host_t *ha = arg;
        qla_hw_t *hw;
        if_t ifp;

        hw = &ha->hw;
        ifp = ha->ifp;

        if (ha->flags.qla_watchdog_exit)
                return;

        if (!ha->flags.qla_watchdog_pause) {
                if (qla_le32_to_host(*(hw->tx_cons)) != hw->txr_comp) {
                        taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
                } else if (!if_sendq_empty(ifp) && QL_RUNNING(ifp)) {
                        taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
                }
        }
        ha->watchdog_ticks = (ha->watchdog_ticks + 1) % 1000;
        callout_reset(&ha->tx_callout, QLA_WATCHDOG_CALLOUT_TICKS,
                qla_watchdog, ha);
}

/*
 * Name:        qla_pci_attach
 * Function:    attaches the device to the operating system
 */
static int
qla_pci_attach(device_t dev)
{
        qla_host_t *ha = NULL;
        uint32_t rsrc_len, i;

        QL_DPRINT2((dev, "%s: enter\n", __func__));

        if ((ha = device_get_softc(dev)) == NULL) {
                device_printf(dev, "cannot get softc\n");
                return (ENOMEM);
        }

        memset(ha, 0, sizeof (qla_host_t));

        if (pci_get_device(dev) != PCI_PRODUCT_QLOGIC_ISP8020) {
                device_printf(dev, "device is not ISP8020\n");
                return (ENXIO);
        }

        ha->pci_func = pci_get_function(dev);

        ha->pci_dev = dev;

        pci_enable_busmaster(dev);

        ha->reg_rid = PCIR_BAR(0);
        ha->pci_reg = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &ha->reg_rid,
                                RF_ACTIVE);

        if (ha->pci_reg == NULL) {
                device_printf(dev, "unable to map any ports\n");
                goto qla_pci_attach_err;
        }

        rsrc_len = (uint32_t) bus_get_resource_count(dev, SYS_RES_MEMORY,
                                        ha->reg_rid);

        mtx_init(&ha->hw_lock, "qla80xx_hw_lock", MTX_NETWORK_LOCK, MTX_DEF);
        mtx_init(&ha->tx_lock, "qla80xx_tx_lock", MTX_NETWORK_LOCK, MTX_DEF);
        mtx_init(&ha->rx_lock, "qla80xx_rx_lock", MTX_NETWORK_LOCK, MTX_DEF);
        mtx_init(&ha->rxj_lock, "qla80xx_rxj_lock", MTX_NETWORK_LOCK, MTX_DEF);
        ha->flags.lock_init = 1;

        ha->msix_count = pci_msix_count(dev);

        if (ha->msix_count < qla_get_msix_count(ha)) {
                device_printf(dev, "%s: msix_count[%d] not enough\n", __func__,
                        ha->msix_count);
                goto qla_pci_attach_err;
        }

        QL_DPRINT2((dev, "%s: ha %p irq %p pci_func 0x%x rsrc_count 0x%08x"
                " msix_count 0x%x pci_reg %p\n", __func__, ha,
                ha->irq, ha->pci_func, rsrc_len, ha->msix_count, ha->pci_reg));

        ha->msix_count = qla_get_msix_count(ha);

        if (pci_alloc_msix(dev, &ha->msix_count)) {
                device_printf(dev, "%s: pci_alloc_msi[%d] failed\n", __func__,
                        ha->msix_count);
                ha->msix_count = 0;
                goto qla_pci_attach_err;
        }

        TASK_INIT(&ha->tx_task, 0, qla_tx_done, ha);
        ha->tx_tq = taskqueue_create_fast("qla_txq", M_NOWAIT,
                        taskqueue_thread_enqueue, &ha->tx_tq);
        taskqueue_start_threads(&ha->tx_tq, 1, PI_NET, "%s txq",
                device_get_nameunit(ha->pci_dev));

        for (i = 0; i < ha->msix_count; i++) {
                ha->irq_vec[i].irq_rid = i+1;
                ha->irq_vec[i].ha = ha;

                ha->irq_vec[i].irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
                                        &ha->irq_vec[i].irq_rid,
                                        (RF_ACTIVE | RF_SHAREABLE));

                if (ha->irq_vec[i].irq == NULL) {
                        device_printf(dev, "could not allocate interrupt\n");
                        goto qla_pci_attach_err;
                }

                if (bus_setup_intr(dev, ha->irq_vec[i].irq,
                        (INTR_TYPE_NET | INTR_MPSAFE),
                        NULL, qla_isr, &ha->irq_vec[i],
                        &ha->irq_vec[i].handle)) {
                        device_printf(dev, "could not setup interrupt\n");
                        goto qla_pci_attach_err;
                }

                TASK_INIT(&ha->irq_vec[i].rcv_task, 0, qla_rcv,\
                        &ha->irq_vec[i]);

                ha->irq_vec[i].rcv_tq = taskqueue_create_fast("qla_rcvq",
                        M_NOWAIT, taskqueue_thread_enqueue,
                        &ha->irq_vec[i].rcv_tq);

                taskqueue_start_threads(&ha->irq_vec[i].rcv_tq, 1, PI_NET,
                        "%s rcvq",
                        device_get_nameunit(ha->pci_dev));
        }

        qla_add_sysctls(ha);

        /* add hardware specific sysctls */
        qla_hw_add_sysctls(ha);

        /* initialize hardware */
        if (qla_init_hw(ha)) {
                device_printf(dev, "%s: qla_init_hw failed\n", __func__);
                goto qla_pci_attach_err;
        }

        device_printf(dev, "%s: firmware[%d.%d.%d.%d]\n", __func__,
                ha->fw_ver_major, ha->fw_ver_minor, ha->fw_ver_sub,
                ha->fw_ver_build);

        snprintf(ha->fw_ver_str, sizeof(ha->fw_ver_str), "%d.%d.%d.%d",
                        ha->fw_ver_major, ha->fw_ver_minor, ha->fw_ver_sub,
                        ha->fw_ver_build);

        //qla_get_hw_caps(ha);
        qla_read_mac_addr(ha);

        /* allocate parent dma tag */
        if (qla_alloc_parent_dma_tag(ha)) {
                device_printf(dev, "%s: qla_alloc_parent_dma_tag failed\n",
                        __func__);
                goto qla_pci_attach_err;
        }

        /* alloc all dma buffers */
        if (qla_alloc_dma(ha)) {
                device_printf(dev, "%s: qla_alloc_dma failed\n", __func__);
                goto qla_pci_attach_err;
        }

        /* create the o.s ethernet interface */
        qla_init_ifnet(dev, ha);

        ha->flags.qla_watchdog_active = 1;
        ha->flags.qla_watchdog_pause = 1;

        callout_init(&ha->tx_callout, 1);

        /* create ioctl device interface */
        if (qla_make_cdev(ha)) {
                device_printf(dev, "%s: qla_make_cdev failed\n", __func__);
                goto qla_pci_attach_err;
        }

        callout_reset(&ha->tx_callout, QLA_WATCHDOG_CALLOUT_TICKS,
                qla_watchdog, ha);

        QL_DPRINT2((dev, "%s: exit 0\n", __func__));
        return (0);

qla_pci_attach_err:

        qla_release(ha);

        QL_DPRINT2((dev, "%s: exit ENXIO\n", __func__));
        return (ENXIO);
}

/*
 * Name:        qla_pci_detach
 * Function:    Unhooks the device from the operating system
 */
static int
qla_pci_detach(device_t dev)
{
        qla_host_t *ha = NULL;
        int i;

        QL_DPRINT2((dev, "%s: enter\n", __func__));

        if ((ha = device_get_softc(dev)) == NULL) {
                device_printf(dev, "cannot get softc\n");
                return (ENOMEM);
        }

        QLA_LOCK(ha, __func__);
        qla_stop(ha);
        QLA_UNLOCK(ha, __func__);

        if (ha->tx_tq) {
                taskqueue_drain(ha->tx_tq, &ha->tx_task);
                taskqueue_free(ha->tx_tq);
        }

        for (i = 0; i < ha->msix_count; i++) {
                taskqueue_drain(ha->irq_vec[i].rcv_tq,
                        &ha->irq_vec[i].rcv_task);
                taskqueue_free(ha->irq_vec[i].rcv_tq);
        }

        qla_release(ha);

        QL_DPRINT2((dev, "%s: exit\n", __func__));

        return (0);
}

/*
 * SYSCTL Related Callbacks
 */
static int
qla_sysctl_get_stats(SYSCTL_HANDLER_ARGS)
{
        int err, ret = 0;
        qla_host_t *ha;

        err = sysctl_handle_int(oidp, &ret, 0, req);

        if (err)
                return (err);

        ha = (qla_host_t *)arg1;
        //qla_get_stats(ha);
        QL_DPRINT2((ha->pci_dev, "%s: called ret %d\n", __func__, ret));
        return (err);
}

/*
 * Name:        qla_release
 * Function:    Releases the resources allocated for the device
 */
static void
qla_release(qla_host_t *ha)
{
        device_t dev;
        int i;

        dev = ha->pci_dev;

        qla_del_cdev(ha);

        if (ha->flags.qla_watchdog_active)
                ha->flags.qla_watchdog_exit = 1;

        callout_stop(&ha->tx_callout);
        qla_mdelay(__func__, 100);

        if (ha->ifp != NULL)
                ether_ifdetach(ha->ifp);

        qla_free_dma(ha); 
        qla_free_parent_dma_tag(ha);

        for (i = 0; i < ha->msix_count; i++) {
                if (ha->irq_vec[i].handle)
                        (void)bus_teardown_intr(dev, ha->irq_vec[i].irq,
                                ha->irq_vec[i].handle);
                if (ha->irq_vec[i].irq)
                        (void) bus_release_resource(dev, SYS_RES_IRQ,
                                ha->irq_vec[i].irq_rid,
                                ha->irq_vec[i].irq);
        }
        if (ha->msix_count)
                pci_release_msi(dev);

        if (ha->flags.lock_init) {
                mtx_destroy(&ha->tx_lock);
                mtx_destroy(&ha->rx_lock);
                mtx_destroy(&ha->rxj_lock);
                mtx_destroy(&ha->hw_lock);
        }

        if (ha->pci_reg)
                (void) bus_release_resource(dev, SYS_RES_MEMORY, ha->reg_rid,
                                ha->pci_reg);
}

/*
 * DMA Related Functions
 */

static void
qla_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
        *((bus_addr_t *)arg) = 0;

        if (error) {
                printf("%s: bus_dmamap_load failed (%d)\n", __func__, error);
                return;
        }

        QL_ASSERT((nsegs == 1), ("%s: %d segments returned!", __func__, nsegs));

        *((bus_addr_t *)arg) = segs[0].ds_addr;

        return;
}

int
qla_alloc_dmabuf(qla_host_t *ha, qla_dma_t *dma_buf)
{
        int             ret = 0;
        device_t        dev;
        bus_addr_t      b_addr;

        dev = ha->pci_dev;

        QL_DPRINT2((dev, "%s: enter\n", __func__));

        ret = bus_dma_tag_create(
                        ha->parent_tag,/* parent */
                        dma_buf->alignment,
                        ((bus_size_t)(1ULL << 32)),/* boundary */
                        BUS_SPACE_MAXADDR,      /* lowaddr */
                        BUS_SPACE_MAXADDR,      /* highaddr */
                        NULL, NULL,             /* filter, filterarg */
                        dma_buf->size,          /* maxsize */
                        1,                      /* nsegments */
                        dma_buf->size,          /* maxsegsize */
                        0,                      /* flags */
                        NULL, NULL,             /* lockfunc, lockarg */
                        &dma_buf->dma_tag);

        if (ret) {
                device_printf(dev, "%s: could not create dma tag\n", __func__);
                goto qla_alloc_dmabuf_exit;
        }
        ret = bus_dmamem_alloc(dma_buf->dma_tag,
                        (void **)&dma_buf->dma_b,
                        (BUS_DMA_ZERO | BUS_DMA_COHERENT | BUS_DMA_NOWAIT),
                        &dma_buf->dma_map);
        if (ret) {
                bus_dma_tag_destroy(dma_buf->dma_tag);
                device_printf(dev, "%s: bus_dmamem_alloc failed\n", __func__);
                goto qla_alloc_dmabuf_exit;
        }

        ret = bus_dmamap_load(dma_buf->dma_tag,
                        dma_buf->dma_map,
                        dma_buf->dma_b,
                        dma_buf->size,
                        qla_dmamap_callback,
                        &b_addr, BUS_DMA_NOWAIT);

        if (ret || !b_addr) {
                bus_dma_tag_destroy(dma_buf->dma_tag);
                bus_dmamem_free(dma_buf->dma_tag, dma_buf->dma_b,
                        dma_buf->dma_map);
                ret = -1;
                goto qla_alloc_dmabuf_exit;
        }

        dma_buf->dma_addr = b_addr;

qla_alloc_dmabuf_exit:
        QL_DPRINT2((dev, "%s: exit ret 0x%08x tag %p map %p b %p sz 0x%x\n",
                __func__, ret, (void *)dma_buf->dma_tag,
                (void *)dma_buf->dma_map, (void *)dma_buf->dma_b,
                dma_buf->size));

        return ret;
}

void
qla_free_dmabuf(qla_host_t *ha, qla_dma_t *dma_buf)
{
        bus_dmamap_unload(dma_buf->dma_tag, dma_buf->dma_map);
        bus_dmamem_free(dma_buf->dma_tag, dma_buf->dma_b, dma_buf->dma_map);
        bus_dma_tag_destroy(dma_buf->dma_tag);
}

static int
qla_alloc_parent_dma_tag(qla_host_t *ha)
{
        int             ret;
        device_t        dev;

        dev = ha->pci_dev;

        /*
         * Allocate parent DMA Tag
         */
        ret = bus_dma_tag_create(
                        bus_get_dma_tag(dev),   /* parent */
                        1,((bus_size_t)(1ULL << 32)),/* alignment, boundary */
                        BUS_SPACE_MAXADDR,      /* lowaddr */
                        BUS_SPACE_MAXADDR,      /* highaddr */
                        NULL, NULL,             /* filter, filterarg */
                        BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
                        0,                      /* nsegments */
                        BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
                        0,                      /* flags */
                        NULL, NULL,             /* lockfunc, lockarg */
                        &ha->parent_tag);

        if (ret) {
                device_printf(dev, "%s: could not create parent dma tag\n",
                        __func__);
                return (-1);
        }

        ha->flags.parent_tag = 1;

        return (0);
}

static void
qla_free_parent_dma_tag(qla_host_t *ha)
{
        if (ha->flags.parent_tag) {
                bus_dma_tag_destroy(ha->parent_tag);
                ha->flags.parent_tag = 0;
        }
}

/*
 * Name: qla_init_ifnet
 * Function: Creates the Network Device Interface and Registers it with the O.S
 */

static void
qla_init_ifnet(device_t dev, qla_host_t *ha)
{
        if_t ifp;

        QL_DPRINT2((dev, "%s: enter\n", __func__));

        ifp = ha->ifp = if_alloc(IFT_ETHER);

        if_initname(ifp, device_get_name(dev), device_get_unit(dev));

        if_setmtu(ifp, ETHERMTU);
        if_setbaudrate(ifp, IF_Gbps(10));
        if_setinitfn(ifp, qla_init);
        if_setsoftc(ifp, ha);
        if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
        if_setioctlfn(ifp, qla_ioctl);
        if_setstartfn(ifp, qla_start);

        if_setsendqlen(ifp, qla_get_ifq_snd_maxlen(ha));
        if_setsendqready(ifp);

        ha->max_frame_size = if_getmtu(ifp) + ETHER_HDR_LEN + ETHER_CRC_LEN;

        ether_ifattach(ifp, qla_get_mac_addr(ha));

        if_setcapabilities(ifp, IFCAP_HWCSUM |
                                IFCAP_TSO4 |
                                IFCAP_JUMBO_MTU);

        if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU, 0);
        if_setcapabilitiesbit(ifp, IFCAP_LINKSTATE, 0);

        if_setcapenable(ifp, if_getcapabilities(ifp));

        if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));

        ifmedia_init(&ha->media, IFM_IMASK, qla_media_change, qla_media_status);

        ifmedia_add(&ha->media, (IFM_ETHER | qla_get_optics(ha) | IFM_FDX), 0,
                NULL);
        ifmedia_add(&ha->media, (IFM_ETHER | IFM_AUTO), 0, NULL);

        ifmedia_set(&ha->media, (IFM_ETHER | IFM_AUTO));

        QL_DPRINT2((dev, "%s: exit\n", __func__));

        return;
}

static void
qla_init_locked(qla_host_t *ha)
{
        if_t ifp = ha->ifp;

        qla_stop(ha);

        if (qla_alloc_xmt_bufs(ha) != 0) 
                return;

        if (qla_alloc_rcv_bufs(ha) != 0)
                return;

        if (qla_config_lro(ha))
                return;

        bcopy(if_getlladdr(ha->ifp), ha->hw.mac_addr, ETHER_ADDR_LEN);

        if_sethwassist(ifp, CSUM_TCP | CSUM_UDP | CSUM_TSO);

        ha->flags.stop_rcv = 0;
        if (qla_init_hw_if(ha) == 0) {
                ifp = ha->ifp;
                if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
                if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
                ha->flags.qla_watchdog_pause = 0;
        }

        return;
}

static void
qla_init(void *arg)
{
        qla_host_t *ha;

        ha = (qla_host_t *)arg;

        QL_DPRINT2((ha->pci_dev, "%s: enter\n", __func__));

        QLA_LOCK(ha, __func__);
        qla_init_locked(ha);
        QLA_UNLOCK(ha, __func__);

        QL_DPRINT2((ha->pci_dev, "%s: exit\n", __func__));
}

static u_int
qla_copy_maddr(void *arg, struct sockaddr_dl *sdl, u_int mcnt)
{
        uint8_t *mta = arg;

        if (mcnt == Q8_MAX_NUM_MULTICAST_ADDRS)
                return (0);
        bcopy(LLADDR(sdl), &mta[mcnt * Q8_MAC_ADDR_LEN], Q8_MAC_ADDR_LEN);

        return (1);
}

static void
qla_set_multi(qla_host_t *ha, uint32_t add_multi)
{
        uint8_t mta[Q8_MAX_NUM_MULTICAST_ADDRS * Q8_MAC_ADDR_LEN];
        if_t ifp = ha->ifp;
        int mcnt;

        mcnt = if_foreach_llmaddr(ifp, qla_copy_maddr, mta);
        qla_hw_set_multi(ha, mta, mcnt, add_multi);

        return;
}

static int
qla_ioctl(if_t ifp, u_long cmd, caddr_t data)
{
        int ret = 0;
        struct ifreq *ifr = (struct ifreq *)data;
#ifdef INET
        struct ifaddr *ifa = (struct ifaddr *)data;
#endif
        qla_host_t *ha;

        ha = (qla_host_t *)if_getsoftc(ifp);

        switch (cmd) {
        case SIOCSIFADDR:
                QL_DPRINT4((ha->pci_dev, "%s: SIOCSIFADDR (0x%lx)\n",
                        __func__, cmd));

#ifdef INET
                if (ifa->ifa_addr->sa_family == AF_INET) {
                        if_setflagbits(ifp, IFF_UP, 0);
                        if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING)) {
                                QLA_LOCK(ha, __func__);
                                qla_init_locked(ha);
                                QLA_UNLOCK(ha, __func__);
                        }
                QL_DPRINT4((ha->pci_dev,
                        "%s: SIOCSIFADDR (0x%lx) ipv4 [0x%08x]\n",
                        __func__, cmd, ntohl(IA_SIN(ifa)->sin_addr.s_addr)));

                        arp_ifinit(ifp, ifa);
                        if (ntohl(IA_SIN(ifa)->sin_addr.s_addr) != INADDR_ANY) {
                                qla_config_ipv4_addr(ha,
                                        (IA_SIN(ifa)->sin_addr.s_addr));
                        }
                        break;
                }
#endif
                ether_ioctl(ifp, cmd, data);
                break;

        case SIOCSIFMTU:
                QL_DPRINT4((ha->pci_dev, "%s: SIOCSIFMTU (0x%lx)\n",
                        __func__, cmd));

                if (ifr->ifr_mtu > QLA_MAX_FRAME_SIZE - ETHER_HDR_LEN) {
                        ret = EINVAL;
                } else {
                        QLA_LOCK(ha, __func__);
                        if_setmtu(ifp, ifr->ifr_mtu);
                        ha->max_frame_size =
                                if_getmtu(ifp) + ETHER_HDR_LEN + ETHER_CRC_LEN;
                        if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING)) {
                                ret = qla_set_max_mtu(ha, ha->max_frame_size,
                                        (ha->hw.rx_cntxt_rsp)->rx_rsp.cntxt_id);
                        }
                        QLA_UNLOCK(ha, __func__);

                        if (ret)
                                ret = EINVAL;
                }

                break;

        case SIOCSIFFLAGS:
                QL_DPRINT4((ha->pci_dev, "%s: SIOCSIFFLAGS (0x%lx)\n",
                        __func__, cmd));

                if (if_getflags(ifp) & IFF_UP) {
                        if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING)) {
                                if ((if_getflags(ifp) ^ ha->if_flags) &
                                        IFF_PROMISC) {
                                        qla_set_promisc(ha);
                                } else if ((if_getflags(ifp) ^ ha->if_flags) &
                                        IFF_ALLMULTI) {
                                        qla_set_allmulti(ha);
                                }
                        } else {
                                QLA_LOCK(ha, __func__);
                                qla_init_locked(ha);
                                ha->max_frame_size = if_getmtu(ifp) +
                                        ETHER_HDR_LEN + ETHER_CRC_LEN;
                                ret = qla_set_max_mtu(ha, ha->max_frame_size,
                                        (ha->hw.rx_cntxt_rsp)->rx_rsp.cntxt_id);
                                QLA_UNLOCK(ha, __func__);
                        }
                } else {
                        QLA_LOCK(ha, __func__);
                        if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
                                qla_stop(ha);
                        ha->if_flags = if_getflags(ifp);
                        QLA_UNLOCK(ha, __func__);
                }
                break;

        case SIOCADDMULTI:
                QL_DPRINT4((ha->pci_dev,
                        "%s: %s (0x%lx)\n", __func__, "SIOCADDMULTI", cmd));

                if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
                        qla_set_multi(ha, 1);
                }
                break;

        case SIOCDELMULTI:
                QL_DPRINT4((ha->pci_dev,
                        "%s: %s (0x%lx)\n", __func__, "SIOCDELMULTI", cmd));

                if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
                        qla_set_multi(ha, 0);
                }
                break;

        case SIOCSIFMEDIA:
        case SIOCGIFMEDIA:
                QL_DPRINT4((ha->pci_dev,
                        "%s: SIOCSIFMEDIA/SIOCGIFMEDIA (0x%lx)\n",
                        __func__, cmd));
                ret = ifmedia_ioctl(ifp, ifr, &ha->media, cmd);
                break;

        case SIOCSIFCAP:
        {
                int mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);

                QL_DPRINT4((ha->pci_dev, "%s: SIOCSIFCAP (0x%lx)\n",
                        __func__, cmd));

                if (mask & IFCAP_HWCSUM)
                        if_togglecapenable(ifp, IFCAP_HWCSUM);
                if (mask & IFCAP_TSO4)
                        if_togglecapenable(ifp, IFCAP_TSO4);
                if (mask & IFCAP_TSO6)
                        if_togglecapenable(ifp, IFCAP_TSO6);
                if (mask & IFCAP_VLAN_HWTAGGING)
                        if_togglecapenable(ifp, IFCAP_VLAN_HWTAGGING);

                if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
                        qla_init(ha);

                VLAN_CAPABILITIES(ifp);
                break;
        }

        default:
                QL_DPRINT4((ha->pci_dev, "%s: default (0x%lx)\n",
                        __func__, cmd));
                ret = ether_ioctl(ifp, cmd, data);
                break;
        }

        return (ret);
}

static int
qla_media_change(if_t ifp)
{
        qla_host_t *ha;
        struct ifmedia *ifm;
        int ret = 0;

        ha = (qla_host_t *)if_getsoftc(ifp);

        QL_DPRINT2((ha->pci_dev, "%s: enter\n", __func__));

        ifm = &ha->media;

        if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
                ret = EINVAL;

        QL_DPRINT2((ha->pci_dev, "%s: exit\n", __func__));

        return (ret);
}

static void
qla_media_status(if_t ifp, struct ifmediareq *ifmr)
{
        qla_host_t *ha;

        ha = (qla_host_t *)if_getsoftc(ifp);

        QL_DPRINT2((ha->pci_dev, "%s: enter\n", __func__));

        ifmr->ifm_status = IFM_AVALID;
        ifmr->ifm_active = IFM_ETHER;

        qla_update_link_state(ha);
        if (ha->hw.flags.link_up) {
                ifmr->ifm_status |= IFM_ACTIVE;
                ifmr->ifm_active |= (IFM_FDX | qla_get_optics(ha));
        }

        QL_DPRINT2((ha->pci_dev, "%s: exit (%s)\n", __func__,\
                (ha->hw.flags.link_up ? "link_up" : "link_down")));

        return;
}

void
qla_start(if_t ifp)
{
        struct mbuf    *m_head;
        qla_host_t *ha = (qla_host_t *)if_getsoftc(ifp);

        QL_DPRINT8((ha->pci_dev, "%s: enter\n", __func__));

        if (!mtx_trylock(&ha->tx_lock)) {
                QL_DPRINT8((ha->pci_dev,
                        "%s: mtx_trylock(&ha->tx_lock) failed\n", __func__));
                return;
        }

        if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 
                IFF_DRV_RUNNING) {
                QL_DPRINT8((ha->pci_dev, "%s: !IFF_DRV_RUNNING\n", __func__));
                QLA_TX_UNLOCK(ha);
                return;
        }

        if (!ha->watchdog_ticks)
                qla_update_link_state(ha);

        if (!ha->hw.flags.link_up) {
                QL_DPRINT8((ha->pci_dev, "%s: link down\n", __func__));
                QLA_TX_UNLOCK(ha);
                return;
        }

        while (!if_sendq_empty(ifp)) {
                m_head = if_dequeue(ifp);

                if (m_head == NULL) {
                        QL_DPRINT8((ha->pci_dev, "%s: m_head == NULL\n",
                                __func__));
                        break;
                }

                if (qla_send(ha, &m_head)) {
                        if (m_head == NULL)
                                break;
                        QL_DPRINT8((ha->pci_dev, "%s: PREPEND\n", __func__));
                        if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0);
                        if_sendq_prepend(ifp, m_head);
                        break;
                }
                /* Send a copy of the frame to the BPF listener */
                ETHER_BPF_MTAP(ifp, m_head);
        }
        QLA_TX_UNLOCK(ha);
        QL_DPRINT8((ha->pci_dev, "%s: exit\n", __func__));
        return;
}

static int
qla_send(qla_host_t *ha, struct mbuf **m_headp)
{
        bus_dma_segment_t       segs[QLA_MAX_SEGMENTS];
        bus_dmamap_t            map;
        int                     nsegs;
        int                     ret = -1;
        uint32_t                tx_idx;
        struct mbuf *m_head = *m_headp;

        QL_DPRINT8((ha->pci_dev, "%s: enter\n", __func__));

        if ((ret = bus_dmamap_create(ha->tx_tag, BUS_DMA_NOWAIT, &map))) {
                ha->err_tx_dmamap_create++;
                device_printf(ha->pci_dev,
                        "%s: bus_dmamap_create failed[%d, %d]\n",
                        __func__, ret, m_head->m_pkthdr.len);
                return (ret);
        }

        ret = bus_dmamap_load_mbuf_sg(ha->tx_tag, map, m_head, segs, &nsegs,
                        BUS_DMA_NOWAIT);

        if (ret == EFBIG) {
                struct mbuf *m;

                QL_DPRINT8((ha->pci_dev, "%s: EFBIG [%d]\n", __func__,
                        m_head->m_pkthdr.len));

                m = m_defrag(m_head, M_NOWAIT);
                if (m == NULL) {
                        ha->err_tx_defrag++;
                        m_freem(m_head);
                        *m_headp = NULL;
                        device_printf(ha->pci_dev,
                                "%s: m_defrag() = NULL [%d]\n",
                                __func__, ret);
                        return (ENOBUFS);
                }
                m_head = m;

                if ((ret = bus_dmamap_load_mbuf_sg(ha->tx_tag, map, m_head,
                                        segs, &nsegs, BUS_DMA_NOWAIT))) {
                        ha->err_tx_dmamap_load++;

                        device_printf(ha->pci_dev,
                                "%s: bus_dmamap_load_mbuf_sg failed0[%d, %d]\n",
                                __func__, ret, m_head->m_pkthdr.len);

                        bus_dmamap_destroy(ha->tx_tag, map);
                        if (ret != ENOMEM) {
                                m_freem(m_head);
                                *m_headp = NULL;
                        }
                        return (ret);
                }
        } else if (ret) {
                ha->err_tx_dmamap_load++;

                device_printf(ha->pci_dev,
                        "%s: bus_dmamap_load_mbuf_sg failed1[%d, %d]\n",
                        __func__, ret, m_head->m_pkthdr.len);

                bus_dmamap_destroy(ha->tx_tag, map);

                if (ret != ENOMEM) {
                        m_freem(m_head);
                        *m_headp = NULL;
                }
                return (ret);
        }

        QL_ASSERT((nsegs != 0), ("qla_send: empty packet"));

        bus_dmamap_sync(ha->tx_tag, map, BUS_DMASYNC_PREWRITE);

        if (!(ret = qla_hw_send(ha, segs, nsegs, &tx_idx, m_head))) {
                ha->tx_buf[tx_idx].m_head = m_head;
                ha->tx_buf[tx_idx].map = map;
        } else {
                if (ret == EINVAL) {
                        m_freem(m_head);
                        *m_headp = NULL;
                }
        }

        QL_DPRINT8((ha->pci_dev, "%s: exit\n", __func__));
        return (ret);
}

static void
qla_stop(qla_host_t *ha)
{
        if_t ifp = ha->ifp;

        ha->flags.qla_watchdog_pause = 1;
        qla_mdelay(__func__, 100);

        ha->flags.stop_rcv = 1;
        qla_hw_stop_rcv(ha);

        qla_del_hw_if(ha);

        qla_free_lro(ha);

        qla_free_xmt_bufs(ha);
        qla_free_rcv_bufs(ha);

        if_setdrvflagbits(ifp, 0, (IFF_DRV_OACTIVE | IFF_DRV_RUNNING));

        return;
}

/*
 * Buffer Management Functions for Transmit and Receive Rings
 */
static int
qla_alloc_xmt_bufs(qla_host_t *ha)
{
        if (bus_dma_tag_create(NULL,    /* parent */
                1, 0,    /* alignment, bounds */
                BUS_SPACE_MAXADDR,       /* lowaddr */
                BUS_SPACE_MAXADDR,       /* highaddr */
                NULL, NULL,      /* filter, filterarg */
                QLA_MAX_TSO_FRAME_SIZE,     /* maxsize */
                QLA_MAX_SEGMENTS,        /* nsegments */
                PAGE_SIZE,        /* maxsegsize */
                BUS_DMA_ALLOCNOW,        /* flags */
                NULL,    /* lockfunc */
                NULL,    /* lockfuncarg */
                &ha->tx_tag)) {
                device_printf(ha->pci_dev, "%s: tx_tag alloc failed\n",
                        __func__);
                return (ENOMEM);
        }
        bzero((void *)ha->tx_buf, (sizeof(qla_tx_buf_t) * NUM_TX_DESCRIPTORS));

        return 0;
}

/*
 * Release mbuf after it sent on the wire
 */
static void
qla_clear_tx_buf(qla_host_t *ha, qla_tx_buf_t *txb)
{
        QL_DPRINT2((ha->pci_dev, "%s: enter\n", __func__));

        if (txb->m_head) {
                bus_dmamap_unload(ha->tx_tag, txb->map);
                bus_dmamap_destroy(ha->tx_tag, txb->map);

                m_freem(txb->m_head);
                txb->m_head = NULL;
        }

        QL_DPRINT2((ha->pci_dev, "%s: exit\n", __func__));
}

static void
qla_free_xmt_bufs(qla_host_t *ha)
{
        int             i;

        for (i = 0; i < NUM_TX_DESCRIPTORS; i++)
                qla_clear_tx_buf(ha, &ha->tx_buf[i]);

        if (ha->tx_tag != NULL) {
                bus_dma_tag_destroy(ha->tx_tag);
                ha->tx_tag = NULL;
        }
        bzero((void *)ha->tx_buf, (sizeof(qla_tx_buf_t) * NUM_TX_DESCRIPTORS));

        return;
}

static int
qla_alloc_rcv_bufs(qla_host_t *ha)
{
        int             i, j, ret = 0;
        qla_rx_buf_t    *rxb;

        if (bus_dma_tag_create(NULL,    /* parent */
                        1, 0,    /* alignment, bounds */
                        BUS_SPACE_MAXADDR,       /* lowaddr */
                        BUS_SPACE_MAXADDR,       /* highaddr */
                        NULL, NULL,      /* filter, filterarg */
                        MJUM9BYTES,     /* maxsize */
                        1,        /* nsegments */
                        MJUM9BYTES,        /* maxsegsize */
                        BUS_DMA_ALLOCNOW,        /* flags */
                        NULL,    /* lockfunc */
                        NULL,    /* lockfuncarg */
                        &ha->rx_tag)) {
                device_printf(ha->pci_dev, "%s: rx_tag alloc failed\n",
                        __func__);

                return (ENOMEM);
        }

        bzero((void *)ha->rx_buf, (sizeof(qla_rx_buf_t) * NUM_RX_DESCRIPTORS));
        bzero((void *)ha->rx_jbuf,
                (sizeof(qla_rx_buf_t) * NUM_RX_JUMBO_DESCRIPTORS));

        for (i = 0; i < MAX_SDS_RINGS; i++) {
                ha->hw.sds[i].sdsr_next = 0;
                ha->hw.sds[i].rxb_free = NULL;
                ha->hw.sds[i].rx_free = 0;
                ha->hw.sds[i].rxjb_free = NULL;
                ha->hw.sds[i].rxj_free = 0;
        }

        for (i = 0; i < NUM_RX_DESCRIPTORS; i++) {
                rxb = &ha->rx_buf[i];

                ret = bus_dmamap_create(ha->rx_tag, BUS_DMA_NOWAIT, &rxb->map);

                if (ret) {
                        device_printf(ha->pci_dev,
                                "%s: dmamap[%d] failed\n", __func__, i);

                        for (j = 0; j < i; j++) {
                                bus_dmamap_destroy(ha->rx_tag,
                                        ha->rx_buf[j].map);
                        }
                        goto qla_alloc_rcv_bufs_failed;
                }
        }

        qla_init_hw_rcv_descriptors(ha, RDS_RING_INDEX_NORMAL);

        for (i = 0; i < NUM_RX_DESCRIPTORS; i++) {
                rxb = &ha->rx_buf[i];
                rxb->handle = i;
                if (!(ret = qla_get_mbuf(ha, rxb, NULL, 0))) {
                        /*
                         * set the physical address in the corresponding
                         * descriptor entry in the receive ring/queue for the
                         * hba 
                         */
                        qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_NORMAL, i,
                                rxb->handle, rxb->paddr,
                                (rxb->m_head)->m_pkthdr.len);
                } else {
                        device_printf(ha->pci_dev,
                                "%s: qla_get_mbuf [standard(%d)] failed\n",
                                __func__, i);
                        bus_dmamap_destroy(ha->rx_tag, rxb->map);
                        goto qla_alloc_rcv_bufs_failed;
                }
        }

        for (i = 0; i < NUM_RX_JUMBO_DESCRIPTORS; i++) {
                rxb = &ha->rx_jbuf[i];

                ret = bus_dmamap_create(ha->rx_tag, BUS_DMA_NOWAIT, &rxb->map);

                if (ret) {
                        device_printf(ha->pci_dev,
                                "%s: dmamap[%d] failed\n", __func__, i);

                        for (j = 0; j < i; j++) {
                                bus_dmamap_destroy(ha->rx_tag,
                                        ha->rx_jbuf[j].map);
                        }
                        goto qla_alloc_rcv_bufs_failed;
                }
        }

        qla_init_hw_rcv_descriptors(ha, RDS_RING_INDEX_JUMBO);

        for (i = 0; i < NUM_RX_JUMBO_DESCRIPTORS; i++) {
                rxb = &ha->rx_jbuf[i];
                rxb->handle = i;
                if (!(ret = qla_get_mbuf(ha, rxb, NULL, 1))) {
                        /*
                         * set the physical address in the corresponding
                         * descriptor entry in the receive ring/queue for the
                         * hba 
                         */
                        qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_JUMBO, i,
                                rxb->handle, rxb->paddr,
                                (rxb->m_head)->m_pkthdr.len);
                } else {
                        device_printf(ha->pci_dev,
                                "%s: qla_get_mbuf [jumbo(%d)] failed\n",
                                __func__, i);
                        bus_dmamap_destroy(ha->rx_tag, rxb->map);
                        goto qla_alloc_rcv_bufs_failed;
                }
        }

        return (0);

qla_alloc_rcv_bufs_failed:
        qla_free_rcv_bufs(ha);
        return (ret);
}

static void
qla_free_rcv_bufs(qla_host_t *ha)
{
        int             i;
        qla_rx_buf_t    *rxb;

        for (i = 0; i < NUM_RX_DESCRIPTORS; i++) {
                rxb = &ha->rx_buf[i];
                if (rxb->m_head != NULL) {
                        bus_dmamap_unload(ha->rx_tag, rxb->map);
                        bus_dmamap_destroy(ha->rx_tag, rxb->map);
                        m_freem(rxb->m_head);
                        rxb->m_head = NULL;
                }
        }

        for (i = 0; i < NUM_RX_JUMBO_DESCRIPTORS; i++) {
                rxb = &ha->rx_jbuf[i];
                if (rxb->m_head != NULL) {
                        bus_dmamap_unload(ha->rx_tag, rxb->map);
                        bus_dmamap_destroy(ha->rx_tag, rxb->map);
                        m_freem(rxb->m_head);
                        rxb->m_head = NULL;
                }
        }

        if (ha->rx_tag != NULL) {
                bus_dma_tag_destroy(ha->rx_tag);
                ha->rx_tag = NULL;
        }

        bzero((void *)ha->rx_buf, (sizeof(qla_rx_buf_t) * NUM_RX_DESCRIPTORS));
        bzero((void *)ha->rx_jbuf,
                (sizeof(qla_rx_buf_t) * NUM_RX_JUMBO_DESCRIPTORS));

        for (i = 0; i < MAX_SDS_RINGS; i++) {
                ha->hw.sds[i].sdsr_next = 0;
                ha->hw.sds[i].rxb_free = NULL;
                ha->hw.sds[i].rx_free = 0;
                ha->hw.sds[i].rxjb_free = NULL;
                ha->hw.sds[i].rxj_free = 0;
        }

        return;
}

int
qla_get_mbuf(qla_host_t *ha, qla_rx_buf_t *rxb, struct mbuf *nmp,
        uint32_t jumbo)
{
        struct mbuf *mp = nmp;
        int             ret = 0;
        uint32_t        offset;

        QL_DPRINT2((ha->pci_dev, "%s: jumbo(0x%x) enter\n", __func__, jumbo));

        if (mp == NULL) {
                if (!jumbo) {
                        mp = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);

                        if (mp == NULL) {
                                ha->err_m_getcl++;
                                ret = ENOBUFS;
                                device_printf(ha->pci_dev,
                                        "%s: m_getcl failed\n", __func__);
                                goto exit_qla_get_mbuf;
                        }
                        mp->m_len = mp->m_pkthdr.len = MCLBYTES;
                } else {
                        mp = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
                                MJUM9BYTES);
                        if (mp == NULL) {
                                ha->err_m_getjcl++;
                                ret = ENOBUFS;
                                device_printf(ha->pci_dev,
                                        "%s: m_getjcl failed\n", __func__);
                                goto exit_qla_get_mbuf;
                        }
                        mp->m_len = mp->m_pkthdr.len = MJUM9BYTES;
                }
        } else {
                if (!jumbo)
                        mp->m_len = mp->m_pkthdr.len = MCLBYTES;
                else
                        mp->m_len = mp->m_pkthdr.len = MJUM9BYTES;

                mp->m_data = mp->m_ext.ext_buf;
                mp->m_next = NULL;
        }

        offset = (uint32_t)((unsigned long long)mp->m_data & 0x7ULL);
        if (offset) {
                offset = 8 - offset;
                m_adj(mp, offset);
        }

        /*
         * Using memory from the mbuf cluster pool, invoke the bus_dma
         * machinery to arrange the memory mapping.
         */
        ret = bus_dmamap_load(ha->rx_tag, rxb->map,
                                mtod(mp, void *), mp->m_len,
                                qla_dmamap_callback, &rxb->paddr,
                                BUS_DMA_NOWAIT);
        if (ret || !rxb->paddr) {
                m_free(mp);
                rxb->m_head = NULL;
                device_printf(ha->pci_dev,
                        "%s: bus_dmamap_load failed\n", __func__);
                ret = -1;
                goto exit_qla_get_mbuf;
        }
        rxb->m_head = mp;
        bus_dmamap_sync(ha->rx_tag, rxb->map, BUS_DMASYNC_PREREAD);

exit_qla_get_mbuf:
        QL_DPRINT2((ha->pci_dev, "%s: exit ret = 0x%08x\n", __func__, ret));
        return (ret);
}

static void
qla_tx_done(void *context, int pending)
{
        qla_host_t *ha = context;

        qla_hw_tx_done(ha);
        qla_start(ha->ifp);
}