ehea_main.c

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/*
 *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
 *
 *  eHEA ethernet device driver for IBM eServer System p
 *
 *  (C) Copyright IBM Corp. 2006
 *
 *  Authors:
 *   Christoph Raisch <[email protected]>
 *   Jan-Bernd Themann <[email protected]>
 *   Thomas Klein <[email protected]>
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/if_ether.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/memory.h>
#include <asm/kexec.h>
#include <linux/mutex.h>
#include <linux/prefetch.h>

#include <net/ip.h>

#include "ehea.h"
#include "ehea_qmr.h"
#include "ehea_phyp.h"


MODULE_LICENSE("GPL");
MODULE_AUTHOR("Christoph Raisch <[email protected]>");
MODULE_DESCRIPTION("IBM eServer HEA Driver");
MODULE_VERSION(DRV_VERSION);


static int msg_level = -1;
static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
static int sq_entries = EHEA_DEF_ENTRIES_SQ;
static int use_mcs = 1;
static int prop_carrier_state;

module_param(msg_level, int, 0);
module_param(rq1_entries, int, 0);
module_param(rq2_entries, int, 0);
module_param(rq3_entries, int, 0);
module_param(sq_entries, int, 0);
module_param(prop_carrier_state, int, 0);
module_param(use_mcs, int, 0);

MODULE_PARM_DESC(msg_level, "msg_level");
MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
         "port to stack. 1:yes, 0:no.  Default = 0 ");
MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
         "[2^x - 1], x = [6..14]. Default = "
         __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
         "[2^x - 1], x = [6..14]. Default = "
         __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
         "[2^x - 1], x = [6..14]. Default = "
         __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
         "[2^x - 1], x = [6..14]. Default = "
         __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
         "Default = 1");

static int port_name_cnt;
static LIST_HEAD(adapter_list);
static unsigned long ehea_driver_flags;
static DEFINE_MUTEX(dlpar_mem_lock);
static struct ehea_fw_handle_array ehea_fw_handles;
static struct ehea_bcmc_reg_array ehea_bcmc_regs;


static int __devinit ehea_probe_adapter(struct platform_device *dev,
                    const struct of_device_id *id);

static int __devexit ehea_remove(struct platform_device *dev);

static struct of_device_id ehea_device_table[] = {
    {
        .name = "lhea",
        .compatible = "IBM,lhea",
    },
    {},
};
MODULE_DEVICE_TABLE(of, ehea_device_table);

static struct of_platform_driver ehea_driver = {
    .driver = {
        .name = "ehea",
        .owner = THIS_MODULE,
        .of_match_table = ehea_device_table,
    },
    .probe = ehea_probe_adapter,
    .remove = ehea_remove,
};

void ehea_dump(void *adr, int len, char *msg)
{
    int x;
    unsigned char *deb = adr;
    for (x = 0; x < len; x += 16) {
        pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
            msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
        deb += 16;
    }
}

static void ehea_schedule_port_reset(struct ehea_port *port)
{
    if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
        schedule_work(&port->reset_task);
}

static void ehea_update_firmware_handles(void)
{
    struct ehea_fw_handle_entry *arr = NULL;
    struct ehea_adapter *adapter;
    int num_adapters = 0;
    int num_ports = 0;
    int num_portres = 0;
    int i = 0;
    int num_fw_handles, k, l;

    /* Determine number of handles */
    mutex_lock(&ehea_fw_handles.lock);

    list_for_each_entry(adapter, &adapter_list, list) {
        num_adapters++;

        for (k = 0; k < EHEA_MAX_PORTS; k++) {
            struct ehea_port *port = adapter->port[k];

            if (!port || (port->state != EHEA_PORT_UP))
                continue;

            num_ports++;
            num_portres += port->num_def_qps;
        }
    }

    num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
             num_ports * EHEA_NUM_PORT_FW_HANDLES +
             num_portres * EHEA_NUM_PORTRES_FW_HANDLES;

    if (num_fw_handles) {
        arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
        if (!arr)
            goto out;  /* Keep the existing array */
    } else
        goto out_update;

    list_for_each_entry(adapter, &adapter_list, list) {
        if (num_adapters == 0)
            break;

        for (k = 0; k < EHEA_MAX_PORTS; k++) {
            struct ehea_port *port = adapter->port[k];

            if (!port || (port->state != EHEA_PORT_UP) ||
                (num_ports == 0))
                continue;

            for (l = 0; l < port->num_def_qps; l++) {
                struct ehea_port_res *pr = &port->port_res[l];

                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->qp->fw_handle;
                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->send_cq->fw_handle;
                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->recv_cq->fw_handle;
                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->eq->fw_handle;
                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->send_mr.handle;
                arr[i].adh = adapter->handle;
                arr[i++].fwh = pr->recv_mr.handle;
            }
            arr[i].adh = adapter->handle;
            arr[i++].fwh = port->qp_eq->fw_handle;
            num_ports--;
        }

        arr[i].adh = adapter->handle;
        arr[i++].fwh = adapter->neq->fw_handle;

        if (adapter->mr.handle) {
            arr[i].adh = adapter->handle;
            arr[i++].fwh = adapter->mr.handle;
        }
        num_adapters--;
    }

out_update:
    kfree(ehea_fw_handles.arr);
    ehea_fw_handles.arr = arr;
    ehea_fw_handles.num_entries = i;
out:
    mutex_unlock(&ehea_fw_handles.lock);
}

static void ehea_update_bcmc_registrations(void)
{
    unsigned long flags;
    struct ehea_bcmc_reg_entry *arr = NULL;
    struct ehea_adapter *adapter;
    struct ehea_mc_list *mc_entry;
    int num_registrations = 0;
    int i = 0;
    int k;

    spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);

    /* Determine number of registrations */
    list_for_each_entry(adapter, &adapter_list, list)
        for (k = 0; k < EHEA_MAX_PORTS; k++) {
            struct ehea_port *port = adapter->port[k];

            if (!port || (port->state != EHEA_PORT_UP))
                continue;

            num_registrations += 2; /* Broadcast registrations */

            list_for_each_entry(mc_entry, &port->mc_list->list,list)
                num_registrations += 2;
        }

    if (num_registrations) {
        arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
        if (!arr)
            goto out;  /* Keep the existing array */
    } else
        goto out_update;

    list_for_each_entry(adapter, &adapter_list, list) {
        for (k = 0; k < EHEA_MAX_PORTS; k++) {
            struct ehea_port *port = adapter->port[k];

            if (!port || (port->state != EHEA_PORT_UP))
                continue;

            if (num_registrations == 0)
                goto out_update;

            arr[i].adh = adapter->handle;
            arr[i].port_id = port->logical_port_id;
            arr[i].reg_type = EHEA_BCMC_BROADCAST |
                      EHEA_BCMC_UNTAGGED;
            arr[i++].macaddr = port->mac_addr;

            arr[i].adh = adapter->handle;
            arr[i].port_id = port->logical_port_id;
            arr[i].reg_type = EHEA_BCMC_BROADCAST |
                      EHEA_BCMC_VLANID_ALL;
            arr[i++].macaddr = port->mac_addr;
            num_registrations -= 2;

            list_for_each_entry(mc_entry,
                        &port->mc_list->list, list) {
                if (num_registrations == 0)
                    goto out_update;

                arr[i].adh = adapter->handle;
                arr[i].port_id = port->logical_port_id;
                arr[i].reg_type = EHEA_BCMC_MULTICAST |
                          EHEA_BCMC_UNTAGGED;
                if (mc_entry->macaddr == 0)
                    arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
                arr[i++].macaddr = mc_entry->macaddr;

                arr[i].adh = adapter->handle;
                arr[i].port_id = port->logical_port_id;
                arr[i].reg_type = EHEA_BCMC_MULTICAST |
                          EHEA_BCMC_VLANID_ALL;
                if (mc_entry->macaddr == 0)
                    arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
                arr[i++].macaddr = mc_entry->macaddr;
                num_registrations -= 2;
            }
        }
    }

out_update:
    kfree(ehea_bcmc_regs.arr);
    ehea_bcmc_regs.arr = arr;
    ehea_bcmc_regs.num_entries = i;
out:
    spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
}

static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
                    struct rtnl_link_stats64 *stats)
{
    struct ehea_port *port = netdev_priv(dev);
    u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
    int i;

    for (i = 0; i < port->num_def_qps; i++) {
        rx_packets += port->port_res[i].rx_packets;
        rx_bytes   += port->port_res[i].rx_bytes;
    }

    for (i = 0; i < port->num_def_qps; i++) {
        tx_packets += port->port_res[i].tx_packets;
        tx_bytes   += port->port_res[i].tx_bytes;
    }

    stats->tx_packets = tx_packets;
    stats->rx_bytes = rx_bytes;
    stats->tx_bytes = tx_bytes;
    stats->rx_packets = rx_packets;

    stats->multicast = port->stats.multicast;
    stats->rx_errors = port->stats.rx_errors;
    return stats;
}

static void ehea_update_stats(struct work_struct *work)
{
    struct ehea_port *port =
        container_of(work, struct ehea_port, stats_work.work);
    struct net_device *dev = port->netdev;
    struct rtnl_link_stats64 *stats = &port->stats;
    struct hcp_ehea_port_cb2 *cb2;
    u64 hret;

    cb2 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb2) {
        netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
        goto resched;
    }

    hret = ehea_h_query_ehea_port(port->adapter->handle,
                      port->logical_port_id,
                      H_PORT_CB2, H_PORT_CB2_ALL, cb2);
    if (hret != H_SUCCESS) {
        netdev_err(dev, "query_ehea_port failed\n");
        goto out_herr;
    }

    if (netif_msg_hw(port))
        ehea_dump(cb2, sizeof(*cb2), "net_device_stats");

    stats->multicast = cb2->rxmcp;
    stats->rx_errors = cb2->rxuerr;

out_herr:
    free_page((unsigned long)cb2);
resched:
    schedule_delayed_work(&port->stats_work,
                  round_jiffies_relative(msecs_to_jiffies(1000)));
}

static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
{
    struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
    struct net_device *dev = pr->port->netdev;
    int max_index_mask = pr->rq1_skba.len - 1;
    int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
    int adder = 0;
    int i;

    pr->rq1_skba.os_skbs = 0;

    if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
        if (nr_of_wqes > 0)
            pr->rq1_skba.index = index;
        pr->rq1_skba.os_skbs = fill_wqes;
        return;
    }

    for (i = 0; i < fill_wqes; i++) {
        if (!skb_arr_rq1[index]) {
            skb_arr_rq1[index] = netdev_alloc_skb(dev,
                                  EHEA_L_PKT_SIZE);
            if (!skb_arr_rq1[index]) {
                netdev_info(dev, "Unable to allocate enough skb in the array\n");
                pr->rq1_skba.os_skbs = fill_wqes - i;
                break;
            }
        }
        index--;
        index &= max_index_mask;
        adder++;
    }

    if (adder == 0)
        return;

    /* Ring doorbell */
    ehea_update_rq1a(pr->qp, adder);
}

static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
{
    struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
    struct net_device *dev = pr->port->netdev;
    int i;

    if (nr_rq1a > pr->rq1_skba.len) {
        netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
        return;
    }

    for (i = 0; i < nr_rq1a; i++) {
        skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
        if (!skb_arr_rq1[i]) {
            netdev_info(dev, "Not enough memory to allocate skb array\n");
            break;
        }
    }
    /* Ring doorbell */
    ehea_update_rq1a(pr->qp, i - 1);
}

static int ehea_refill_rq_def(struct ehea_port_res *pr,
                  struct ehea_q_skb_arr *q_skba, int rq_nr,
                  int num_wqes, int wqe_type, int packet_size)
{
    struct net_device *dev = pr->port->netdev;
    struct ehea_qp *qp = pr->qp;
    struct sk_buff **skb_arr = q_skba->arr;
    struct ehea_rwqe *rwqe;
    int i, index, max_index_mask, fill_wqes;
    int adder = 0;
    int ret = 0;

    fill_wqes = q_skba->os_skbs + num_wqes;
    q_skba->os_skbs = 0;

    if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
        q_skba->os_skbs = fill_wqes;
        return ret;
    }

    index = q_skba->index;
    max_index_mask = q_skba->len - 1;
    for (i = 0; i < fill_wqes; i++) {
        u64 tmp_addr;
        struct sk_buff *skb;

        skb = netdev_alloc_skb_ip_align(dev, packet_size);
        if (!skb) {
            q_skba->os_skbs = fill_wqes - i;
            if (q_skba->os_skbs == q_skba->len - 2) {
                netdev_info(pr->port->netdev,
                        "rq%i ran dry - no mem for skb\n",
                        rq_nr);
                ret = -ENOMEM;
            }
            break;
        }

        skb_arr[index] = skb;
        tmp_addr = ehea_map_vaddr(skb->data);
        if (tmp_addr == -1) {
            dev_kfree_skb(skb);
            q_skba->os_skbs = fill_wqes - i;
            ret = 0;
            break;
        }

        rwqe = ehea_get_next_rwqe(qp, rq_nr);
        rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
                | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
        rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
        rwqe->sg_list[0].vaddr = tmp_addr;
        rwqe->sg_list[0].len = packet_size;
        rwqe->data_segments = 1;

        index++;
        index &= max_index_mask;
        adder++;
    }

    q_skba->index = index;
    if (adder == 0)
        goto out;

    /* Ring doorbell */
    iosync();
    if (rq_nr == 2)
        ehea_update_rq2a(pr->qp, adder);
    else
        ehea_update_rq3a(pr->qp, adder);
out:
    return ret;
}


static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
{
    return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
                  nr_of_wqes, EHEA_RWQE2_TYPE,
                  EHEA_RQ2_PKT_SIZE);
}


static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
{
    return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
                  nr_of_wqes, EHEA_RWQE3_TYPE,
                  EHEA_MAX_PACKET_SIZE);
}

static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
{
    *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
    if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
        return 0;
    if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
        (cqe->header_length == 0))
        return 0;
    return -EINVAL;
}

static inline void ehea_fill_skb(struct net_device *dev,
                 struct sk_buff *skb, struct ehea_cqe *cqe,
                 struct ehea_port_res *pr)
{
    int length = cqe->num_bytes_transfered - 4; /*remove CRC */

    skb_put(skb, length);
    skb->protocol = eth_type_trans(skb, dev);

    /* The packet was not an IPV4 packet so a complemented checksum was
       calculated. The value is found in the Internet Checksum field. */
    if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
        skb->ip_summed = CHECKSUM_COMPLETE;
        skb->csum = csum_unfold(~cqe->inet_checksum_value);
    } else
        skb->ip_summed = CHECKSUM_UNNECESSARY;

    skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
}

static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
                           int arr_len,
                           struct ehea_cqe *cqe)
{
    int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
    struct sk_buff *skb;
    void *pref;
    int x;

    x = skb_index + 1;
    x &= (arr_len - 1);

    pref = skb_array[x];
    if (pref) {
        prefetchw(pref);
        prefetchw(pref + EHEA_CACHE_LINE);

        pref = (skb_array[x]->data);
        prefetch(pref);
        prefetch(pref + EHEA_CACHE_LINE);
        prefetch(pref + EHEA_CACHE_LINE * 2);
        prefetch(pref + EHEA_CACHE_LINE * 3);
    }

    skb = skb_array[skb_index];
    skb_array[skb_index] = NULL;
    return skb;
}

static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
                          int arr_len, int wqe_index)
{
    struct sk_buff *skb;
    void *pref;
    int x;

    x = wqe_index + 1;
    x &= (arr_len - 1);

    pref = skb_array[x];
    if (pref) {
        prefetchw(pref);
        prefetchw(pref + EHEA_CACHE_LINE);

        pref = (skb_array[x]->data);
        prefetchw(pref);
        prefetchw(pref + EHEA_CACHE_LINE);
    }

    skb = skb_array[wqe_index];
    skb_array[wqe_index] = NULL;
    return skb;
}

static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
                 struct ehea_cqe *cqe, int *processed_rq2,
                 int *processed_rq3)
{
    struct sk_buff *skb;

    if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
        pr->p_stats.err_tcp_cksum++;
    if (cqe->status & EHEA_CQE_STAT_ERR_IP)
        pr->p_stats.err_ip_cksum++;
    if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
        pr->p_stats.err_frame_crc++;

    if (rq == 2) {
        *processed_rq2 += 1;
        skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
        dev_kfree_skb(skb);
    } else if (rq == 3) {
        *processed_rq3 += 1;
        skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
        dev_kfree_skb(skb);
    }

    if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
        if (netif_msg_rx_err(pr->port)) {
            pr_err("Critical receive error for QP %d. Resetting port.\n",
                   pr->qp->init_attr.qp_nr);
            ehea_dump(cqe, sizeof(*cqe), "CQE");
        }
        ehea_schedule_port_reset(pr->port);
        return 1;
    }

    return 0;
}

static int ehea_proc_rwqes(struct net_device *dev,
               struct ehea_port_res *pr,
               int budget)
{
    struct ehea_port *port = pr->port;
    struct ehea_qp *qp = pr->qp;
    struct ehea_cqe *cqe;
    struct sk_buff *skb;
    struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
    struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
    struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
    int skb_arr_rq1_len = pr->rq1_skba.len;
    int skb_arr_rq2_len = pr->rq2_skba.len;
    int skb_arr_rq3_len = pr->rq3_skba.len;
    int processed, processed_rq1, processed_rq2, processed_rq3;
    u64 processed_bytes = 0;
    int wqe_index, last_wqe_index, rq, port_reset;

    processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
    last_wqe_index = 0;

    cqe = ehea_poll_rq1(qp, &wqe_index);
    while ((processed < budget) && cqe) {
        ehea_inc_rq1(qp);
        processed_rq1++;
        processed++;
        if (netif_msg_rx_status(port))
            ehea_dump(cqe, sizeof(*cqe), "CQE");

        last_wqe_index = wqe_index;
        rmb();
        if (!ehea_check_cqe(cqe, &rq)) {
            if (rq == 1) {
                /* LL RQ1 */
                skb = get_skb_by_index_ll(skb_arr_rq1,
                              skb_arr_rq1_len,
                              wqe_index);
                if (unlikely(!skb)) {
                    netif_info(port, rx_err, dev,
                          "LL rq1: skb=NULL\n");

                    skb = netdev_alloc_skb(dev,
                                   EHEA_L_PKT_SIZE);
                    if (!skb) {
                        netdev_err(dev, "Not enough memory to allocate skb\n");
                        break;
                    }
                }
                skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
                         cqe->num_bytes_transfered - 4);
                ehea_fill_skb(dev, skb, cqe, pr);
            } else if (rq == 2) {
                /* RQ2 */
                skb = get_skb_by_index(skb_arr_rq2,
                               skb_arr_rq2_len, cqe);
                if (unlikely(!skb)) {
                    netif_err(port, rx_err, dev,
                          "rq2: skb=NULL\n");
                    break;
                }
                ehea_fill_skb(dev, skb, cqe, pr);
                processed_rq2++;
            } else {
                /* RQ3 */
                skb = get_skb_by_index(skb_arr_rq3,
                               skb_arr_rq3_len, cqe);
                if (unlikely(!skb)) {
                    netif_err(port, rx_err, dev,
                          "rq3: skb=NULL\n");
                    break;
                }
                ehea_fill_skb(dev, skb, cqe, pr);
                processed_rq3++;
            }

            processed_bytes += skb->len;

            if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
                __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);

            napi_gro_receive(&pr->napi, skb);
        } else {
            pr->p_stats.poll_receive_errors++;
            port_reset = ehea_treat_poll_error(pr, rq, cqe,
                               &processed_rq2,
                               &processed_rq3);
            if (port_reset)
                break;
        }
        cqe = ehea_poll_rq1(qp, &wqe_index);
    }

    pr->rx_packets += processed;
    pr->rx_bytes += processed_bytes;

    ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
    ehea_refill_rq2(pr, processed_rq2);
    ehea_refill_rq3(pr, processed_rq3);

    return processed;
}

#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull

static void reset_sq_restart_flag(struct ehea_port *port)
{
    int i;

    for (i = 0; i < port->num_def_qps; i++) {
        struct ehea_port_res *pr = &port->port_res[i];
        pr->sq_restart_flag = 0;
    }
    wake_up(&port->restart_wq);
}

static void check_sqs(struct ehea_port *port)
{
    struct ehea_swqe *swqe;
    int swqe_index;
    int i, k;

    for (i = 0; i < port->num_def_qps; i++) {
        struct ehea_port_res *pr = &port->port_res[i];
        int ret;
        k = 0;
        swqe = ehea_get_swqe(pr->qp, &swqe_index);
        memset(swqe, 0, SWQE_HEADER_SIZE);
        atomic_dec(&pr->swqe_avail);

        swqe->tx_control |= EHEA_SWQE_PURGE;
        swqe->wr_id = SWQE_RESTART_CHECK;
        swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
        swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
        swqe->immediate_data_length = 80;

        ehea_post_swqe(pr->qp, swqe);

        ret = wait_event_timeout(port->restart_wq,
                     pr->sq_restart_flag == 0,
                     msecs_to_jiffies(100));

        if (!ret) {
            pr_err("HW/SW queues out of sync\n");
            ehea_schedule_port_reset(pr->port);
            return;
        }
    }
}


static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
{
    struct sk_buff *skb;
    struct ehea_cq *send_cq = pr->send_cq;
    struct ehea_cqe *cqe;
    int quota = my_quota;
    int cqe_counter = 0;
    int swqe_av = 0;
    int index;
    struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
                        pr - &pr->port->port_res[0]);

    cqe = ehea_poll_cq(send_cq);
    while (cqe && (quota > 0)) {
        ehea_inc_cq(send_cq);

        cqe_counter++;
        rmb();

        if (cqe->wr_id == SWQE_RESTART_CHECK) {
            pr->sq_restart_flag = 1;
            swqe_av++;
            break;
        }

        if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
            pr_err("Bad send completion status=0x%04X\n",
                   cqe->status);

            if (netif_msg_tx_err(pr->port))
                ehea_dump(cqe, sizeof(*cqe), "Send CQE");

            if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
                pr_err("Resetting port\n");
                ehea_schedule_port_reset(pr->port);
                break;
            }
        }

        if (netif_msg_tx_done(pr->port))
            ehea_dump(cqe, sizeof(*cqe), "CQE");

        if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
               == EHEA_SWQE2_TYPE)) {

            index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
            skb = pr->sq_skba.arr[index];
            dev_kfree_skb(skb);
            pr->sq_skba.arr[index] = NULL;
        }

        swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
        quota--;

        cqe = ehea_poll_cq(send_cq);
    }

    ehea_update_feca(send_cq, cqe_counter);
    atomic_add(swqe_av, &pr->swqe_avail);

    if (unlikely(netif_tx_queue_stopped(txq) &&
             (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
        __netif_tx_lock(txq, smp_processor_id());
        if (netif_tx_queue_stopped(txq) &&
            (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
            netif_tx_wake_queue(txq);
        __netif_tx_unlock(txq);
    }

    wake_up(&pr->port->swqe_avail_wq);

    return cqe;
}

#define EHEA_POLL_MAX_CQES 65535

static int ehea_poll(struct napi_struct *napi, int budget)
{
    struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
                        napi);
    struct net_device *dev = pr->port->netdev;
    struct ehea_cqe *cqe;
    struct ehea_cqe *cqe_skb = NULL;
    int wqe_index;
    int rx = 0;

    cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
    rx += ehea_proc_rwqes(dev, pr, budget - rx);

    while (rx != budget) {
        napi_complete(napi);
        ehea_reset_cq_ep(pr->recv_cq);
        ehea_reset_cq_ep(pr->send_cq);
        ehea_reset_cq_n1(pr->recv_cq);
        ehea_reset_cq_n1(pr->send_cq);
        rmb();
        cqe = ehea_poll_rq1(pr->qp, &wqe_index);
        cqe_skb = ehea_poll_cq(pr->send_cq);

        if (!cqe && !cqe_skb)
            return rx;

        if (!napi_reschedule(napi))
            return rx;

        cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
        rx += ehea_proc_rwqes(dev, pr, budget - rx);
    }

    return rx;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void ehea_netpoll(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    int i;

    for (i = 0; i < port->num_def_qps; i++)
        napi_schedule(&port->port_res[i].napi);
}
#endif

static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
{
    struct ehea_port_res *pr = param;

    napi_schedule(&pr->napi);

    return IRQ_HANDLED;
}

static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
{
    struct ehea_port *port = param;
    struct ehea_eqe *eqe;
    struct ehea_qp *qp;
    u32 qp_token;
    u64 resource_type, aer, aerr;
    int reset_port = 0;

    eqe = ehea_poll_eq(port->qp_eq);

    while (eqe) {
        qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
        pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
               eqe->entry, qp_token);

        qp = port->port_res[qp_token].qp;

        resource_type = ehea_error_data(port->adapter, qp->fw_handle,
                        &aer, &aerr);

        if (resource_type == EHEA_AER_RESTYPE_QP) {
            if ((aer & EHEA_AER_RESET_MASK) ||
                (aerr & EHEA_AERR_RESET_MASK))
                 reset_port = 1;
        } else
            reset_port = 1;   /* Reset in case of CQ or EQ error */

        eqe = ehea_poll_eq(port->qp_eq);
    }

    if (reset_port) {
        pr_err("Resetting port\n");
        ehea_schedule_port_reset(port);
    }

    return IRQ_HANDLED;
}

static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
                       int logical_port)
{
    int i;

    for (i = 0; i < EHEA_MAX_PORTS; i++)
        if (adapter->port[i])
            if (adapter->port[i]->logical_port_id == logical_port)
                return adapter->port[i];
    return NULL;
}

int ehea_sense_port_attr(struct ehea_port *port)
{
    int ret;
    u64 hret;
    struct hcp_ehea_port_cb0 *cb0;

    /* may be called via ehea_neq_tasklet() */
    cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
    if (!cb0) {
        pr_err("no mem for cb0\n");
        ret = -ENOMEM;
        goto out;
    }

    hret = ehea_h_query_ehea_port(port->adapter->handle,
                      port->logical_port_id, H_PORT_CB0,
                      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
                      cb0);
    if (hret != H_SUCCESS) {
        ret = -EIO;
        goto out_free;
    }

    /* MAC address */
    port->mac_addr = cb0->port_mac_addr << 16;

    if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
        ret = -EADDRNOTAVAIL;
        goto out_free;
    }

    /* Port speed */
    switch (cb0->port_speed) {
    case H_SPEED_10M_H:
        port->port_speed = EHEA_SPEED_10M;
        port->full_duplex = 0;
        break;
    case H_SPEED_10M_F:
        port->port_speed = EHEA_SPEED_10M;
        port->full_duplex = 1;
        break;
    case H_SPEED_100M_H:
        port->port_speed = EHEA_SPEED_100M;
        port->full_duplex = 0;
        break;
    case H_SPEED_100M_F:
        port->port_speed = EHEA_SPEED_100M;
        port->full_duplex = 1;
        break;
    case H_SPEED_1G_F:
        port->port_speed = EHEA_SPEED_1G;
        port->full_duplex = 1;
        break;
    case H_SPEED_10G_F:
        port->port_speed = EHEA_SPEED_10G;
        port->full_duplex = 1;
        break;
    default:
        port->port_speed = 0;
        port->full_duplex = 0;
        break;
    }

    port->autoneg = 1;
    port->num_mcs = cb0->num_default_qps;

    /* Number of default QPs */
    if (use_mcs)
        port->num_def_qps = cb0->num_default_qps;
    else
        port->num_def_qps = 1;

    if (!port->num_def_qps) {
        ret = -EINVAL;
        goto out_free;
    }

    ret = 0;
out_free:
    if (ret || netif_msg_probe(port))
        ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
    free_page((unsigned long)cb0);
out:
    return ret;
}

int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
{
    struct hcp_ehea_port_cb4 *cb4;
    u64 hret;
    int ret = 0;

    cb4 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb4) {
        pr_err("no mem for cb4\n");
        ret = -ENOMEM;
        goto out;
    }

    cb4->port_speed = port_speed;

    netif_carrier_off(port->netdev);

    hret = ehea_h_modify_ehea_port(port->adapter->handle,
                       port->logical_port_id,
                       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
    if (hret == H_SUCCESS) {
        port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;

        hret = ehea_h_query_ehea_port(port->adapter->handle,
                          port->logical_port_id,
                          H_PORT_CB4, H_PORT_CB4_SPEED,
                          cb4);
        if (hret == H_SUCCESS) {
            switch (cb4->port_speed) {
            case H_SPEED_10M_H:
                port->port_speed = EHEA_SPEED_10M;
                port->full_duplex = 0;
                break;
            case H_SPEED_10M_F:
                port->port_speed = EHEA_SPEED_10M;
                port->full_duplex = 1;
                break;
            case H_SPEED_100M_H:
                port->port_speed = EHEA_SPEED_100M;
                port->full_duplex = 0;
                break;
            case H_SPEED_100M_F:
                port->port_speed = EHEA_SPEED_100M;
                port->full_duplex = 1;
                break;
            case H_SPEED_1G_F:
                port->port_speed = EHEA_SPEED_1G;
                port->full_duplex = 1;
                break;
            case H_SPEED_10G_F:
                port->port_speed = EHEA_SPEED_10G;
                port->full_duplex = 1;
                break;
            default:
                port->port_speed = 0;
                port->full_duplex = 0;
                break;
            }
        } else {
            pr_err("Failed sensing port speed\n");
            ret = -EIO;
        }
    } else {
        if (hret == H_AUTHORITY) {
            pr_info("Hypervisor denied setting port speed\n");
            ret = -EPERM;
        } else {
            ret = -EIO;
            pr_err("Failed setting port speed\n");
        }
    }
    if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
        netif_carrier_on(port->netdev);

    free_page((unsigned long)cb4);
out:
    return ret;
}

static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
{
    int ret;
    u8 ec;
    u8 portnum;
    struct ehea_port *port;
    struct net_device *dev;

    ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
    portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
    port = ehea_get_port(adapter, portnum);
    dev = port->netdev;

    switch (ec) {
    case EHEA_EC_PORTSTATE_CHG: /* port state change */

        if (!port) {
            netdev_err(dev, "unknown portnum %x\n", portnum);
            break;
        }

        if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
            if (!netif_carrier_ok(dev)) {
                ret = ehea_sense_port_attr(port);
                if (ret) {
                    netdev_err(dev, "failed resensing port attributes\n");
                    break;
                }

                netif_info(port, link, dev,
                       "Logical port up: %dMbps %s Duplex\n",
                       port->port_speed,
                       port->full_duplex == 1 ?
                       "Full" : "Half");

                netif_carrier_on(dev);
                netif_wake_queue(dev);
            }
        } else
            if (netif_carrier_ok(dev)) {
                netif_info(port, link, dev,
                       "Logical port down\n");
                netif_carrier_off(dev);
                netif_tx_disable(dev);
            }

        if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
            port->phy_link = EHEA_PHY_LINK_UP;
            netif_info(port, link, dev,
                   "Physical port up\n");
            if (prop_carrier_state)
                netif_carrier_on(dev);
        } else {
            port->phy_link = EHEA_PHY_LINK_DOWN;
            netif_info(port, link, dev,
                   "Physical port down\n");
            if (prop_carrier_state)
                netif_carrier_off(dev);
        }

        if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
            netdev_info(dev,
                    "External switch port is primary port\n");
        else
            netdev_info(dev,
                    "External switch port is backup port\n");

        break;
    case EHEA_EC_ADAPTER_MALFUNC:
        netdev_err(dev, "Adapter malfunction\n");
        break;
    case EHEA_EC_PORT_MALFUNC:
        netdev_info(dev, "Port malfunction\n");
        netif_carrier_off(dev);
        netif_tx_disable(dev);
        break;
    default:
        netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
        break;
    }
}

static void ehea_neq_tasklet(unsigned long data)
{
    struct ehea_adapter *adapter = (struct ehea_adapter *)data;
    struct ehea_eqe *eqe;
    u64 event_mask;

    eqe = ehea_poll_eq(adapter->neq);
    pr_debug("eqe=%p\n", eqe);

    while (eqe) {
        pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
        ehea_parse_eqe(adapter, eqe->entry);
        eqe = ehea_poll_eq(adapter->neq);
        pr_debug("next eqe=%p\n", eqe);
    }

    event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
           | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
           | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);

    ehea_h_reset_events(adapter->handle,
                adapter->neq->fw_handle, event_mask);
}

static irqreturn_t ehea_interrupt_neq(int irq, void *param)
{
    struct ehea_adapter *adapter = param;
    tasklet_hi_schedule(&adapter->neq_tasklet);
    return IRQ_HANDLED;
}


static int ehea_fill_port_res(struct ehea_port_res *pr)
{
    int ret;
    struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;

    ehea_init_fill_rq1(pr, pr->rq1_skba.len);

    ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);

    ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);

    return ret;
}

static int ehea_reg_interrupts(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_port_res *pr;
    int i, ret;


    snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
         dev->name);

    ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
                  ehea_qp_aff_irq_handler,
                  IRQF_DISABLED, port->int_aff_name, port);
    if (ret) {
        netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
               port->qp_eq->attr.ist1);
        goto out_free_qpeq;
    }

    netif_info(port, ifup, dev,
           "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
           port->qp_eq->attr.ist1);


    for (i = 0; i < port->num_def_qps; i++) {
        pr = &port->port_res[i];
        snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
             "%s-queue%d", dev->name, i);
        ret = ibmebus_request_irq(pr->eq->attr.ist1,
                      ehea_recv_irq_handler,
                      IRQF_DISABLED, pr->int_send_name,
                      pr);
        if (ret) {
            netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
                   i, pr->eq->attr.ist1);
            goto out_free_req;
        }
        netif_info(port, ifup, dev,
               "irq_handle 0x%X for function ehea_queue_int %d registered\n",
               pr->eq->attr.ist1, i);
    }
out:
    return ret;


out_free_req:
    while (--i >= 0) {
        u32 ist = port->port_res[i].eq->attr.ist1;
        ibmebus_free_irq(ist, &port->port_res[i]);
    }

out_free_qpeq:
    ibmebus_free_irq(port->qp_eq->attr.ist1, port);
    i = port->num_def_qps;

    goto out;

}

static void ehea_free_interrupts(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_port_res *pr;
    int i;

    /* send */

    for (i = 0; i < port->num_def_qps; i++) {
        pr = &port->port_res[i];
        ibmebus_free_irq(pr->eq->attr.ist1, pr);
        netif_info(port, intr, dev,
               "free send irq for res %d with handle 0x%X\n",
               i, pr->eq->attr.ist1);
    }

    /* associated events */
    ibmebus_free_irq(port->qp_eq->attr.ist1, port);
    netif_info(port, intr, dev,
           "associated event interrupt for handle 0x%X freed\n",
           port->qp_eq->attr.ist1);
}

static int ehea_configure_port(struct ehea_port *port)
{
    int ret, i;
    u64 hret, mask;
    struct hcp_ehea_port_cb0 *cb0;

    ret = -ENOMEM;
    cb0 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb0)
        goto out;

    cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
             | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
             | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
             | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
             | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
                      PXLY_RC_VLAN_FILTER)
             | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);

    for (i = 0; i < port->num_mcs; i++)
        if (use_mcs)
            cb0->default_qpn_arr[i] =
                port->port_res[i].qp->init_attr.qp_nr;
        else
            cb0->default_qpn_arr[i] =
                port->port_res[0].qp->init_attr.qp_nr;

    if (netif_msg_ifup(port))
        ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");

    mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
         | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);

    hret = ehea_h_modify_ehea_port(port->adapter->handle,
                       port->logical_port_id,
                       H_PORT_CB0, mask, cb0);
    ret = -EIO;
    if (hret != H_SUCCESS)
        goto out_free;

    ret = 0;

out_free:
    free_page((unsigned long)cb0);
out:
    return ret;
}

static int ehea_gen_smrs(struct ehea_port_res *pr)
{
    int ret;
    struct ehea_adapter *adapter = pr->port->adapter;

    ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
    if (ret)
        goto out;

    ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
    if (ret)
        goto out_free;

    return 0;

out_free:
    ehea_rem_mr(&pr->send_mr);
out:
    pr_err("Generating SMRS failed\n");
    return -EIO;
}

static int ehea_rem_smrs(struct ehea_port_res *pr)
{
    if ((ehea_rem_mr(&pr->send_mr)) ||
        (ehea_rem_mr(&pr->recv_mr)))
        return -EIO;
    else
        return 0;
}

static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
{
    int arr_size = sizeof(void *) * max_q_entries;

    q_skba->arr = vzalloc(arr_size);
    if (!q_skba->arr)
        return -ENOMEM;

    q_skba->len = max_q_entries;
    q_skba->index = 0;
    q_skba->os_skbs = 0;

    return 0;
}

static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
                  struct port_res_cfg *pr_cfg, int queue_token)
{
    struct ehea_adapter *adapter = port->adapter;
    enum ehea_eq_type eq_type = EHEA_EQ;
    struct ehea_qp_init_attr *init_attr = NULL;
    int ret = -EIO;
    u64 tx_bytes, rx_bytes, tx_packets, rx_packets;

    tx_bytes = pr->tx_bytes;
    tx_packets = pr->tx_packets;
    rx_bytes = pr->rx_bytes;
    rx_packets = pr->rx_packets;

    memset(pr, 0, sizeof(struct ehea_port_res));

    pr->tx_bytes = rx_bytes;
    pr->tx_packets = tx_packets;
    pr->rx_bytes = rx_bytes;
    pr->rx_packets = rx_packets;

    pr->port = port;

    pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
    if (!pr->eq) {
        pr_err("create_eq failed (eq)\n");
        goto out_free;
    }

    pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
                     pr->eq->fw_handle,
                     port->logical_port_id);
    if (!pr->recv_cq) {
        pr_err("create_cq failed (cq_recv)\n");
        goto out_free;
    }

    pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
                     pr->eq->fw_handle,
                     port->logical_port_id);
    if (!pr->send_cq) {
        pr_err("create_cq failed (cq_send)\n");
        goto out_free;
    }

    if (netif_msg_ifup(port))
        pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
            pr->send_cq->attr.act_nr_of_cqes,
            pr->recv_cq->attr.act_nr_of_cqes);

    init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
    if (!init_attr) {
        ret = -ENOMEM;
        pr_err("no mem for ehea_qp_init_attr\n");
        goto out_free;
    }

    init_attr->low_lat_rq1 = 1;
    init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
    init_attr->rq_count = 3;
    init_attr->qp_token = queue_token;
    init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
    init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
    init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
    init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
    init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
    init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
    init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
    init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
    init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
    init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
    init_attr->port_nr = port->logical_port_id;
    init_attr->send_cq_handle = pr->send_cq->fw_handle;
    init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
    init_attr->aff_eq_handle = port->qp_eq->fw_handle;

    pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
    if (!pr->qp) {
        pr_err("create_qp failed\n");
        ret = -EIO;
        goto out_free;
    }

    if (netif_msg_ifup(port))
        pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
            init_attr->qp_nr,
            init_attr->act_nr_send_wqes,
            init_attr->act_nr_rwqes_rq1,
            init_attr->act_nr_rwqes_rq2,
            init_attr->act_nr_rwqes_rq3);

    pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;

    ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
    ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
    ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
    ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
    if (ret)
        goto out_free;

    pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
    if (ehea_gen_smrs(pr) != 0) {
        ret = -EIO;
        goto out_free;
    }

    atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);

    kfree(init_attr);

    netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);

    ret = 0;
    goto out;

out_free:
    kfree(init_attr);
    vfree(pr->sq_skba.arr);
    vfree(pr->rq1_skba.arr);
    vfree(pr->rq2_skba.arr);
    vfree(pr->rq3_skba.arr);
    ehea_destroy_qp(pr->qp);
    ehea_destroy_cq(pr->send_cq);
    ehea_destroy_cq(pr->recv_cq);
    ehea_destroy_eq(pr->eq);
out:
    return ret;
}

static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
{
    int ret, i;

    if (pr->qp)
        netif_napi_del(&pr->napi);

    ret = ehea_destroy_qp(pr->qp);

    if (!ret) {
        ehea_destroy_cq(pr->send_cq);
        ehea_destroy_cq(pr->recv_cq);
        ehea_destroy_eq(pr->eq);

        for (i = 0; i < pr->rq1_skba.len; i++)
            if (pr->rq1_skba.arr[i])
                dev_kfree_skb(pr->rq1_skba.arr[i]);

        for (i = 0; i < pr->rq2_skba.len; i++)
            if (pr->rq2_skba.arr[i])
                dev_kfree_skb(pr->rq2_skba.arr[i]);

        for (i = 0; i < pr->rq3_skba.len; i++)
            if (pr->rq3_skba.arr[i])
                dev_kfree_skb(pr->rq3_skba.arr[i]);

        for (i = 0; i < pr->sq_skba.len; i++)
            if (pr->sq_skba.arr[i])
                dev_kfree_skb(pr->sq_skba.arr[i]);

        vfree(pr->rq1_skba.arr);
        vfree(pr->rq2_skba.arr);
        vfree(pr->rq3_skba.arr);
        vfree(pr->sq_skba.arr);
        ret = ehea_rem_smrs(pr);
    }
    return ret;
}

static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
                  u32 lkey)
{
    int skb_data_size = skb_headlen(skb);
    u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
    struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
    unsigned int immediate_len = SWQE2_MAX_IMM;

    swqe->descriptors = 0;

    if (skb_is_gso(skb)) {
        swqe->tx_control |= EHEA_SWQE_TSO;
        swqe->mss = skb_shinfo(skb)->gso_size;
        /*
         * For TSO packets we only copy the headers into the
         * immediate area.
         */
        immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
    }

    if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
        skb_copy_from_linear_data(skb, imm_data, immediate_len);
        swqe->immediate_data_length = immediate_len;

        if (skb_data_size > immediate_len) {
            sg1entry->l_key = lkey;
            sg1entry->len = skb_data_size - immediate_len;
            sg1entry->vaddr =
                ehea_map_vaddr(skb->data + immediate_len);
            swqe->descriptors++;
        }
    } else {
        skb_copy_from_linear_data(skb, imm_data, skb_data_size);
        swqe->immediate_data_length = skb_data_size;
    }
}

static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
                    struct ehea_swqe *swqe, u32 lkey)
{
    struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
    skb_frag_t *frag;
    int nfrags, sg1entry_contains_frag_data, i;

    nfrags = skb_shinfo(skb)->nr_frags;
    sg1entry = &swqe->u.immdata_desc.sg_entry;
    sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
    sg1entry_contains_frag_data = 0;

    write_swqe2_immediate(skb, swqe, lkey);

    /* write descriptors */
    if (nfrags > 0) {
        if (swqe->descriptors == 0) {
            /* sg1entry not yet used */
            frag = &skb_shinfo(skb)->frags[0];

            /* copy sg1entry data */
            sg1entry->l_key = lkey;
            sg1entry->len = skb_frag_size(frag);
            sg1entry->vaddr =
                ehea_map_vaddr(skb_frag_address(frag));
            swqe->descriptors++;
            sg1entry_contains_frag_data = 1;
        }

        for (i = sg1entry_contains_frag_data; i < nfrags; i++) {

            frag = &skb_shinfo(skb)->frags[i];
            sgentry = &sg_list[i - sg1entry_contains_frag_data];

            sgentry->l_key = lkey;
            sgentry->len = skb_frag_size(frag);
            sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
            swqe->descriptors++;
        }
    }
}

static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
{
    int ret = 0;
    u64 hret;
    u8 reg_type;

    /* De/Register untagged packets */
    reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
    hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
                     port->logical_port_id,
                     reg_type, port->mac_addr, 0, hcallid);
    if (hret != H_SUCCESS) {
        pr_err("%sregistering bc address failed (tagged)\n",
               hcallid == H_REG_BCMC ? "" : "de");
        ret = -EIO;
        goto out_herr;
    }

    /* De/Register VLAN packets */
    reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
    hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
                     port->logical_port_id,
                     reg_type, port->mac_addr, 0, hcallid);
    if (hret != H_SUCCESS) {
        pr_err("%sregistering bc address failed (vlan)\n",
               hcallid == H_REG_BCMC ? "" : "de");
        ret = -EIO;
    }
out_herr:
    return ret;
}

static int ehea_set_mac_addr(struct net_device *dev, void *sa)
{
    struct ehea_port *port = netdev_priv(dev);
    struct sockaddr *mac_addr = sa;
    struct hcp_ehea_port_cb0 *cb0;
    int ret;
    u64 hret;

    if (!is_valid_ether_addr(mac_addr->sa_data)) {
        ret = -EADDRNOTAVAIL;
        goto out;
    }

    cb0 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb0) {
        pr_err("no mem for cb0\n");
        ret = -ENOMEM;
        goto out;
    }

    memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);

    cb0->port_mac_addr = cb0->port_mac_addr >> 16;

    hret = ehea_h_modify_ehea_port(port->adapter->handle,
                       port->logical_port_id, H_PORT_CB0,
                       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
    if (hret != H_SUCCESS) {
        ret = -EIO;
        goto out_free;
    }

    memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);

    /* Deregister old MAC in pHYP */
    if (port->state == EHEA_PORT_UP) {
        ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
        if (ret)
            goto out_upregs;
    }

    port->mac_addr = cb0->port_mac_addr << 16;

    /* Register new MAC in pHYP */
    if (port->state == EHEA_PORT_UP) {
        ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
        if (ret)
            goto out_upregs;
    }

    ret = 0;

out_upregs:
    ehea_update_bcmc_registrations();
out_free:
    free_page((unsigned long)cb0);
out:
    return ret;
}

static void ehea_promiscuous_error(u64 hret, int enable)
{
    if (hret == H_AUTHORITY)
        pr_info("Hypervisor denied %sabling promiscuous mode\n",
            enable == 1 ? "en" : "dis");
    else
        pr_err("failed %sabling promiscuous mode\n",
               enable == 1 ? "en" : "dis");
}

static void ehea_promiscuous(struct net_device *dev, int enable)
{
    struct ehea_port *port = netdev_priv(dev);
    struct hcp_ehea_port_cb7 *cb7;
    u64 hret;

    if (enable == port->promisc)
        return;

    cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
    if (!cb7) {
        pr_err("no mem for cb7\n");
        goto out;
    }

    /* Modify Pxs_DUCQPN in CB7 */
    cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;

    hret = ehea_h_modify_ehea_port(port->adapter->handle,
                       port->logical_port_id,
                       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
    if (hret) {
        ehea_promiscuous_error(hret, enable);
        goto out;
    }

    port->promisc = enable;
out:
    free_page((unsigned long)cb7);
}

static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
                     u32 hcallid)
{
    u64 hret;
    u8 reg_type;

    reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
    if (mc_mac_addr == 0)
        reg_type |= EHEA_BCMC_SCOPE_ALL;

    hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
                     port->logical_port_id,
                     reg_type, mc_mac_addr, 0, hcallid);
    if (hret)
        goto out;

    reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
    if (mc_mac_addr == 0)
        reg_type |= EHEA_BCMC_SCOPE_ALL;

    hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
                     port->logical_port_id,
                     reg_type, mc_mac_addr, 0, hcallid);
out:
    return hret;
}

static int ehea_drop_multicast_list(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_mc_list *mc_entry = port->mc_list;
    struct list_head *pos;
    struct list_head *temp;
    int ret = 0;
    u64 hret;

    list_for_each_safe(pos, temp, &(port->mc_list->list)) {
        mc_entry = list_entry(pos, struct ehea_mc_list, list);

        hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
                         H_DEREG_BCMC);
        if (hret) {
            pr_err("failed deregistering mcast MAC\n");
            ret = -EIO;
        }

        list_del(pos);
        kfree(mc_entry);
    }
    return ret;
}

static void ehea_allmulti(struct net_device *dev, int enable)
{
    struct ehea_port *port = netdev_priv(dev);
    u64 hret;

    if (!port->allmulti) {
        if (enable) {
            /* Enable ALLMULTI */
            ehea_drop_multicast_list(dev);
            hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
            if (!hret)
                port->allmulti = 1;
            else
                netdev_err(dev,
                       "failed enabling IFF_ALLMULTI\n");
        }
    } else {
        if (!enable) {
            /* Disable ALLMULTI */
            hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
            if (!hret)
                port->allmulti = 0;
            else
                netdev_err(dev,
                       "failed disabling IFF_ALLMULTI\n");
        }
    }
}

static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
{
    struct ehea_mc_list *ehea_mcl_entry;
    u64 hret;

    ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
    if (!ehea_mcl_entry) {
        pr_err("no mem for mcl_entry\n");
        return;
    }

    INIT_LIST_HEAD(&ehea_mcl_entry->list);

    memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);

    hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
                     H_REG_BCMC);
    if (!hret)
        list_add(&ehea_mcl_entry->list, &port->mc_list->list);
    else {
        pr_err("failed registering mcast MAC\n");
        kfree(ehea_mcl_entry);
    }
}

static void ehea_set_multicast_list(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct netdev_hw_addr *ha;
    int ret;

    ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));

    if (dev->flags & IFF_ALLMULTI) {
        ehea_allmulti(dev, 1);
        goto out;
    }
    ehea_allmulti(dev, 0);

    if (!netdev_mc_empty(dev)) {
        ret = ehea_drop_multicast_list(dev);
        if (ret) {
            /* Dropping the current multicast list failed.
             * Enabling ALL_MULTI is the best we can do.
             */
            ehea_allmulti(dev, 1);
        }

        if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
            pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
                port->adapter->max_mc_mac);
            goto out;
        }

        netdev_for_each_mc_addr(ha, dev)
            ehea_add_multicast_entry(port, ha->addr);

    }
out:
    ehea_update_bcmc_registrations();
}

static int ehea_change_mtu(struct net_device *dev, int new_mtu)
{
    if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
        return -EINVAL;
    dev->mtu = new_mtu;
    return 0;
}

static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
{
    swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;

    if (skb->protocol != htons(ETH_P_IP))
        return;

    if (skb->ip_summed == CHECKSUM_PARTIAL)
        swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;

    swqe->ip_start = skb_network_offset(skb);
    swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;

    switch (ip_hdr(skb)->protocol) {
    case IPPROTO_UDP:
        if (skb->ip_summed == CHECKSUM_PARTIAL)
            swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;

        swqe->tcp_offset = swqe->ip_end + 1 +
                   offsetof(struct udphdr, check);
        break;

    case IPPROTO_TCP:
        if (skb->ip_summed == CHECKSUM_PARTIAL)
            swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;

        swqe->tcp_offset = swqe->ip_end + 1 +
                   offsetof(struct tcphdr, check);
        break;
    }
}

static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
               struct ehea_swqe *swqe, u32 lkey)
{
    swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;

    xmit_common(skb, swqe);

    write_swqe2_data(skb, dev, swqe, lkey);
}

static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
               struct ehea_swqe *swqe)
{
    u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];

    xmit_common(skb, swqe);

    if (!skb->data_len)
        skb_copy_from_linear_data(skb, imm_data, skb->len);
    else
        skb_copy_bits(skb, 0, imm_data, skb->len);

    swqe->immediate_data_length = skb->len;
    dev_kfree_skb(skb);
}

static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_swqe *swqe;
    u32 lkey;
    int swqe_index;
    struct ehea_port_res *pr;
    struct netdev_queue *txq;

    pr = &port->port_res[skb_get_queue_mapping(skb)];
    txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));

    swqe = ehea_get_swqe(pr->qp, &swqe_index);
    memset(swqe, 0, SWQE_HEADER_SIZE);
    atomic_dec(&pr->swqe_avail);

    if (vlan_tx_tag_present(skb)) {
        swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
        swqe->vlan_tag = vlan_tx_tag_get(skb);
    }

    pr->tx_packets++;
    pr->tx_bytes += skb->len;

    if (skb->len <= SWQE3_MAX_IMM) {
        u32 sig_iv = port->sig_comp_iv;
        u32 swqe_num = pr->swqe_id_counter;
        ehea_xmit3(skb, dev, swqe);
        swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
            | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
        if (pr->swqe_ll_count >= (sig_iv - 1)) {
            swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
                              sig_iv);
            swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
            pr->swqe_ll_count = 0;
        } else
            pr->swqe_ll_count += 1;
    } else {
        swqe->wr_id =
            EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
              | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
              | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
              | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
        pr->sq_skba.arr[pr->sq_skba.index] = skb;

        pr->sq_skba.index++;
        pr->sq_skba.index &= (pr->sq_skba.len - 1);

        lkey = pr->send_mr.lkey;
        ehea_xmit2(skb, dev, swqe, lkey);
        swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
    }
    pr->swqe_id_counter += 1;

    netif_info(port, tx_queued, dev,
           "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
    if (netif_msg_tx_queued(port))
        ehea_dump(swqe, 512, "swqe");

    if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
        netif_tx_stop_queue(txq);
        swqe->tx_control |= EHEA_SWQE_PURGE;
    }

    ehea_post_swqe(pr->qp, swqe);

    if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
        pr->p_stats.queue_stopped++;
        netif_tx_stop_queue(txq);
    }

    return NETDEV_TX_OK;
}

static int ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_adapter *adapter = port->adapter;
    struct hcp_ehea_port_cb1 *cb1;
    int index;
    u64 hret;
    int err = 0;

    cb1 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb1) {
        pr_err("no mem for cb1\n");
        err = -ENOMEM;
        goto out;
    }

    hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
                      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_port failed\n");
        err = -EINVAL;
        goto out;
    }

    index = (vid / 64);
    cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));

    hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
    if (hret != H_SUCCESS) {
        pr_err("modify_ehea_port failed\n");
        err = -EINVAL;
    }
out:
    free_page((unsigned long)cb1);
    return err;
}

static int ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_adapter *adapter = port->adapter;
    struct hcp_ehea_port_cb1 *cb1;
    int index;
    u64 hret;
    int err = 0;

    cb1 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb1) {
        pr_err("no mem for cb1\n");
        err = -ENOMEM;
        goto out;
    }

    hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
                      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_port failed\n");
        err = -EINVAL;
        goto out;
    }

    index = (vid / 64);
    cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));

    hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
    if (hret != H_SUCCESS) {
        pr_err("modify_ehea_port failed\n");
        err = -EINVAL;
    }
out:
    free_page((unsigned long)cb1);
    return err;
}

static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
{
    int ret = -EIO;
    u64 hret;
    u16 dummy16 = 0;
    u64 dummy64 = 0;
    struct hcp_modify_qp_cb0 *cb0;

    cb0 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb0) {
        ret = -ENOMEM;
        goto out;
    }

    hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_qp failed (1)\n");
        goto out;
    }

    cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
    hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
                     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
                     &dummy64, &dummy64, &dummy16, &dummy16);
    if (hret != H_SUCCESS) {
        pr_err("modify_ehea_qp failed (1)\n");
        goto out;
    }

    hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_qp failed (2)\n");
        goto out;
    }

    cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
    hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
                     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
                     &dummy64, &dummy64, &dummy16, &dummy16);
    if (hret != H_SUCCESS) {
        pr_err("modify_ehea_qp failed (2)\n");
        goto out;
    }

    hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_qp failed (3)\n");
        goto out;
    }

    cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
    hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
                     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
                     &dummy64, &dummy64, &dummy16, &dummy16);
    if (hret != H_SUCCESS) {
        pr_err("modify_ehea_qp failed (3)\n");
        goto out;
    }

    hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
    if (hret != H_SUCCESS) {
        pr_err("query_ehea_qp failed (4)\n");
        goto out;
    }

    ret = 0;
out:
    free_page((unsigned long)cb0);
    return ret;
}

static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
{
    int ret, i;
    struct port_res_cfg pr_cfg, pr_cfg_small_rx;
    enum ehea_eq_type eq_type = EHEA_EQ;

    port->qp_eq = ehea_create_eq(port->adapter, eq_type,
                   EHEA_MAX_ENTRIES_EQ, 1);
    if (!port->qp_eq) {
        ret = -EINVAL;
        pr_err("ehea_create_eq failed (qp_eq)\n");
        goto out_kill_eq;
    }

    pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
    pr_cfg.max_entries_scq = sq_entries * 2;
    pr_cfg.max_entries_sq = sq_entries;
    pr_cfg.max_entries_rq1 = rq1_entries;
    pr_cfg.max_entries_rq2 = rq2_entries;
    pr_cfg.max_entries_rq3 = rq3_entries;

    pr_cfg_small_rx.max_entries_rcq = 1;
    pr_cfg_small_rx.max_entries_scq = sq_entries;
    pr_cfg_small_rx.max_entries_sq = sq_entries;
    pr_cfg_small_rx.max_entries_rq1 = 1;
    pr_cfg_small_rx.max_entries_rq2 = 1;
    pr_cfg_small_rx.max_entries_rq3 = 1;

    for (i = 0; i < def_qps; i++) {
        ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
        if (ret)
            goto out_clean_pr;
    }
    for (i = def_qps; i < def_qps; i++) {
        ret = ehea_init_port_res(port, &port->port_res[i],
                     &pr_cfg_small_rx, i);
        if (ret)
            goto out_clean_pr;
    }

    return 0;

out_clean_pr:
    while (--i >= 0)
        ehea_clean_portres(port, &port->port_res[i]);

out_kill_eq:
    ehea_destroy_eq(port->qp_eq);
    return ret;
}

static int ehea_clean_all_portres(struct ehea_port *port)
{
    int ret = 0;
    int i;

    for (i = 0; i < port->num_def_qps; i++)
        ret |= ehea_clean_portres(port, &port->port_res[i]);

    ret |= ehea_destroy_eq(port->qp_eq);

    return ret;
}

static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
{
    if (adapter->active_ports)
        return;

    ehea_rem_mr(&adapter->mr);
}

static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
{
    if (adapter->active_ports)
        return 0;

    return ehea_reg_kernel_mr(adapter, &adapter->mr);
}

static int ehea_up(struct net_device *dev)
{
    int ret, i;
    struct ehea_port *port = netdev_priv(dev);

    if (port->state == EHEA_PORT_UP)
        return 0;

    ret = ehea_port_res_setup(port, port->num_def_qps);
    if (ret) {
        netdev_err(dev, "port_res_failed\n");
        goto out;
    }

    /* Set default QP for this port */
    ret = ehea_configure_port(port);
    if (ret) {
        netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
        goto out_clean_pr;
    }

    ret = ehea_reg_interrupts(dev);
    if (ret) {
        netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
        goto out_clean_pr;
    }

    for (i = 0; i < port->num_def_qps; i++) {
        ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
        if (ret) {
            netdev_err(dev, "activate_qp failed\n");
            goto out_free_irqs;
        }
    }

    for (i = 0; i < port->num_def_qps; i++) {
        ret = ehea_fill_port_res(&port->port_res[i]);
        if (ret) {
            netdev_err(dev, "out_free_irqs\n");
            goto out_free_irqs;
        }
    }

    ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
    if (ret) {
        ret = -EIO;
        goto out_free_irqs;
    }

    port->state = EHEA_PORT_UP;

    ret = 0;
    goto out;

out_free_irqs:
    ehea_free_interrupts(dev);

out_clean_pr:
    ehea_clean_all_portres(port);
out:
    if (ret)
        netdev_info(dev, "Failed starting. ret=%i\n", ret);

    ehea_update_bcmc_registrations();
    ehea_update_firmware_handles();

    return ret;
}

static void port_napi_disable(struct ehea_port *port)
{
    int i;

    for (i = 0; i < port->num_def_qps; i++)
        napi_disable(&port->port_res[i].napi);
}

static void port_napi_enable(struct ehea_port *port)
{
    int i;

    for (i = 0; i < port->num_def_qps; i++)
        napi_enable(&port->port_res[i].napi);
}

static int ehea_open(struct net_device *dev)
{
    int ret;
    struct ehea_port *port = netdev_priv(dev);

    mutex_lock(&port->port_lock);

    netif_info(port, ifup, dev, "enabling port\n");

    ret = ehea_up(dev);
    if (!ret) {
        port_napi_enable(port);
        netif_tx_start_all_queues(dev);
    }

    mutex_unlock(&port->port_lock);
    schedule_delayed_work(&port->stats_work,
                  round_jiffies_relative(msecs_to_jiffies(1000)));

    return ret;
}

static int ehea_down(struct net_device *dev)
{
    int ret;
    struct ehea_port *port = netdev_priv(dev);

    if (port->state == EHEA_PORT_DOWN)
        return 0;

    ehea_drop_multicast_list(dev);
    ehea_allmulti(dev, 0);
    ehea_broadcast_reg_helper(port, H_DEREG_BCMC);

    ehea_free_interrupts(dev);

    port->state = EHEA_PORT_DOWN;

    ehea_update_bcmc_registrations();

    ret = ehea_clean_all_portres(port);
    if (ret)
        netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);

    ehea_update_firmware_handles();

    return ret;
}

static int ehea_stop(struct net_device *dev)
{
    int ret;
    struct ehea_port *port = netdev_priv(dev);

    netif_info(port, ifdown, dev, "disabling port\n");

    set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
    cancel_work_sync(&port->reset_task);
    cancel_delayed_work_sync(&port->stats_work);
    mutex_lock(&port->port_lock);
    netif_tx_stop_all_queues(dev);
    port_napi_disable(port);
    ret = ehea_down(dev);
    mutex_unlock(&port->port_lock);
    clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
    return ret;
}

static void ehea_purge_sq(struct ehea_qp *orig_qp)
{
    struct ehea_qp qp = *orig_qp;
    struct ehea_qp_init_attr *init_attr = &qp.init_attr;
    struct ehea_swqe *swqe;
    int wqe_index;
    int i;

    for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
        swqe = ehea_get_swqe(&qp, &wqe_index);
        swqe->tx_control |= EHEA_SWQE_PURGE;
    }
}

static void ehea_flush_sq(struct ehea_port *port)
{
    int i;

    for (i = 0; i < port->num_def_qps; i++) {
        struct ehea_port_res *pr = &port->port_res[i];
        int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
        int ret;

        ret = wait_event_timeout(port->swqe_avail_wq,
             atomic_read(&pr->swqe_avail) >= swqe_max,
             msecs_to_jiffies(100));

        if (!ret) {
            pr_err("WARNING: sq not flushed completely\n");
            break;
        }
    }
}

static int ehea_stop_qps(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_adapter *adapter = port->adapter;
    struct hcp_modify_qp_cb0 *cb0;
    int ret = -EIO;
    int dret;
    int i;
    u64 hret;
    u64 dummy64 = 0;
    u16 dummy16 = 0;

    cb0 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb0) {
        ret = -ENOMEM;
        goto out;
    }

    for (i = 0; i < (port->num_def_qps); i++) {
        struct ehea_port_res *pr =  &port->port_res[i];
        struct ehea_qp *qp = pr->qp;

        /* Purge send queue */
        ehea_purge_sq(qp);

        /* Disable queue pair */
        hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                        EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
                        cb0);
        if (hret != H_SUCCESS) {
            pr_err("query_ehea_qp failed (1)\n");
            goto out;
        }

        cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
        cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;

        hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
                         EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
                                1), cb0, &dummy64,
                         &dummy64, &dummy16, &dummy16);
        if (hret != H_SUCCESS) {
            pr_err("modify_ehea_qp failed (1)\n");
            goto out;
        }

        hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                        EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
                        cb0);
        if (hret != H_SUCCESS) {
            pr_err("query_ehea_qp failed (2)\n");
            goto out;
        }

        /* deregister shared memory regions */
        dret = ehea_rem_smrs(pr);
        if (dret) {
            pr_err("unreg shared memory region failed\n");
            goto out;
        }
    }

    ret = 0;
out:
    free_page((unsigned long)cb0);

    return ret;
}

static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
{
    struct ehea_qp qp = *orig_qp;
    struct ehea_qp_init_attr *init_attr = &qp.init_attr;
    struct ehea_rwqe *rwqe;
    struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
    struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
    struct sk_buff *skb;
    u32 lkey = pr->recv_mr.lkey;


    int i;
    int index;

    for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
        rwqe = ehea_get_next_rwqe(&qp, 2);
        rwqe->sg_list[0].l_key = lkey;
        index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
        skb = skba_rq2[index];
        if (skb)
            rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
    }

    for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
        rwqe = ehea_get_next_rwqe(&qp, 3);
        rwqe->sg_list[0].l_key = lkey;
        index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
        skb = skba_rq3[index];
        if (skb)
            rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
    }
}

static int ehea_restart_qps(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);
    struct ehea_adapter *adapter = port->adapter;
    int ret = 0;
    int i;

    struct hcp_modify_qp_cb0 *cb0;
    u64 hret;
    u64 dummy64 = 0;
    u16 dummy16 = 0;

    cb0 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb0) {
        ret = -ENOMEM;
        goto out;
    }

    for (i = 0; i < (port->num_def_qps); i++) {
        struct ehea_port_res *pr =  &port->port_res[i];
        struct ehea_qp *qp = pr->qp;

        ret = ehea_gen_smrs(pr);
        if (ret) {
            netdev_err(dev, "creation of shared memory regions failed\n");
            goto out;
        }

        ehea_update_rqs(qp, pr);

        /* Enable queue pair */
        hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                        EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
                        cb0);
        if (hret != H_SUCCESS) {
            netdev_err(dev, "query_ehea_qp failed (1)\n");
            goto out;
        }

        cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
        cb0->qp_ctl_reg |= H_QP_CR_ENABLED;

        hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
                         EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
                                1), cb0, &dummy64,
                         &dummy64, &dummy16, &dummy16);
        if (hret != H_SUCCESS) {
            netdev_err(dev, "modify_ehea_qp failed (1)\n");
            goto out;
        }

        hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
                        EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
                        cb0);
        if (hret != H_SUCCESS) {
            netdev_err(dev, "query_ehea_qp failed (2)\n");
            goto out;
        }

        /* refill entire queue */
        ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
        ehea_refill_rq2(pr, 0);
        ehea_refill_rq3(pr, 0);
    }
out:
    free_page((unsigned long)cb0);

    return ret;
}

static void ehea_reset_port(struct work_struct *work)
{
    int ret;
    struct ehea_port *port =
        container_of(work, struct ehea_port, reset_task);
    struct net_device *dev = port->netdev;

    mutex_lock(&dlpar_mem_lock);
    port->resets++;
    mutex_lock(&port->port_lock);
    netif_tx_disable(dev);

    port_napi_disable(port);

    ehea_down(dev);

    ret = ehea_up(dev);
    if (ret)
        goto out;

    ehea_set_multicast_list(dev);

    netif_info(port, timer, dev, "reset successful\n");

    port_napi_enable(port);

    netif_tx_wake_all_queues(dev);
out:
    mutex_unlock(&port->port_lock);
    mutex_unlock(&dlpar_mem_lock);
}

static void ehea_rereg_mrs(void)
{
    int ret, i;
    struct ehea_adapter *adapter;

    pr_info("LPAR memory changed - re-initializing driver\n");

    list_for_each_entry(adapter, &adapter_list, list)
        if (adapter->active_ports) {
            /* Shutdown all ports */
            for (i = 0; i < EHEA_MAX_PORTS; i++) {
                struct ehea_port *port = adapter->port[i];
                struct net_device *dev;

                if (!port)
                    continue;

                dev = port->netdev;

                if (dev->flags & IFF_UP) {
                    mutex_lock(&port->port_lock);
                    netif_tx_disable(dev);
                    ehea_flush_sq(port);
                    ret = ehea_stop_qps(dev);
                    if (ret) {
                        mutex_unlock(&port->port_lock);
                        goto out;
                    }
                    port_napi_disable(port);
                    mutex_unlock(&port->port_lock);
                }
                reset_sq_restart_flag(port);
            }

            /* Unregister old memory region */
            ret = ehea_rem_mr(&adapter->mr);
            if (ret) {
                pr_err("unregister MR failed - driver inoperable!\n");
                goto out;
            }
        }

    clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);

    list_for_each_entry(adapter, &adapter_list, list)
        if (adapter->active_ports) {
            /* Register new memory region */
            ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
            if (ret) {
                pr_err("register MR failed - driver inoperable!\n");
                goto out;
            }

            /* Restart all ports */
            for (i = 0; i < EHEA_MAX_PORTS; i++) {
                struct ehea_port *port = adapter->port[i];

                if (port) {
                    struct net_device *dev = port->netdev;

                    if (dev->flags & IFF_UP) {
                        mutex_lock(&port->port_lock);
                        ret = ehea_restart_qps(dev);
                        if (!ret) {
                            check_sqs(port);
                            port_napi_enable(port);
                            netif_tx_wake_all_queues(dev);
                        } else {
                            netdev_err(dev, "Unable to restart QPS\n");
                        }
                        mutex_unlock(&port->port_lock);
                    }
                }
            }
        }
    pr_info("re-initializing driver complete\n");
out:
    return;
}

static void ehea_tx_watchdog(struct net_device *dev)
{
    struct ehea_port *port = netdev_priv(dev);

    if (netif_carrier_ok(dev) &&
        !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
        ehea_schedule_port_reset(port);
}

static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
{
    struct hcp_query_ehea *cb;
    u64 hret;
    int ret;

    cb = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb) {
        ret = -ENOMEM;
        goto out;
    }

    hret = ehea_h_query_ehea(adapter->handle, cb);

    if (hret != H_SUCCESS) {
        ret = -EIO;
        goto out_herr;
    }

    adapter->max_mc_mac = cb->max_mc_mac - 1;
    ret = 0;

out_herr:
    free_page((unsigned long)cb);
out:
    return ret;
}

static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
{
    struct hcp_ehea_port_cb4 *cb4;
    u64 hret;
    int ret = 0;

    *jumbo = 0;

    /* (Try to) enable *jumbo frames */
    cb4 = (void *)get_zeroed_page(GFP_KERNEL);
    if (!cb4) {
        pr_err("no mem for cb4\n");
        ret = -ENOMEM;
        goto out;
    } else {
        hret = ehea_h_query_ehea_port(port->adapter->handle,
                          port->logical_port_id,
                          H_PORT_CB4,
                          H_PORT_CB4_JUMBO, cb4);
        if (hret == H_SUCCESS) {
            if (cb4->jumbo_frame)
                *jumbo = 1;
            else {
                cb4->jumbo_frame = 1;
                hret = ehea_h_modify_ehea_port(port->adapter->
                                   handle,
                                   port->
                                   logical_port_id,
                                   H_PORT_CB4,
                                   H_PORT_CB4_JUMBO,
                                   cb4);
                if (hret == H_SUCCESS)
                    *jumbo = 1;
            }
        } else
            ret = -EINVAL;

        free_page((unsigned long)cb4);
    }
out:
    return ret;
}

static ssize_t ehea_show_port_id(struct device *dev,
                 struct device_attribute *attr, char *buf)
{
    struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
    return sprintf(buf, "%d", port->logical_port_id);
}

static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
           NULL);

static void __devinit logical_port_release(struct device *dev)
{
    struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
    of_node_put(port->ofdev.dev.of_node);
}

static struct device *ehea_register_port(struct ehea_port *port,
                     struct device_node *dn)
{
    int ret;

    port->ofdev.dev.of_node = of_node_get(dn);
    port->ofdev.dev.parent = &port->adapter->ofdev->dev;
    port->ofdev.dev.bus = &ibmebus_bus_type;

    dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
    port->ofdev.dev.release = logical_port_release;

    ret = of_device_register(&port->ofdev);
    if (ret) {
        pr_err("failed to register device. ret=%d\n", ret);
        goto out;
    }

    ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
    if (ret) {
        pr_err("failed to register attributes, ret=%d\n", ret);
        goto out_unreg_of_dev;
    }

    return &port->ofdev.dev;

out_unreg_of_dev:
    of_device_unregister(&port->ofdev);
out:
    return NULL;
}

static void ehea_unregister_port(struct ehea_port *port)
{
    device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
    of_device_unregister(&port->ofdev);
}

static const struct net_device_ops ehea_netdev_ops = {
    .ndo_open       = ehea_open,
    .ndo_stop       = ehea_stop,
    .ndo_start_xmit     = ehea_start_xmit,
#ifdef CONFIG_NET_POLL_CONTROLLER
    .ndo_poll_controller    = ehea_netpoll,
#endif
    .ndo_get_stats64    = ehea_get_stats64,
    .ndo_set_mac_address    = ehea_set_mac_addr,
    .ndo_validate_addr  = eth_validate_addr,
    .ndo_set_rx_mode    = ehea_set_multicast_list,
    .ndo_change_mtu     = ehea_change_mtu,
    .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
    .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
    .ndo_tx_timeout     = ehea_tx_watchdog,
};

static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
                     u32 logical_port_id,
                     struct device_node *dn)
{
    int ret;
    struct net_device *dev;
    struct ehea_port *port;
    struct device *port_dev;
    int jumbo;

    /* allocate memory for the port structures */
    dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);

    if (!dev) {
        ret = -ENOMEM;
        goto out_err;
    }

    port = netdev_priv(dev);

    mutex_init(&port->port_lock);
    port->state = EHEA_PORT_DOWN;
    port->sig_comp_iv = sq_entries / 10;

    port->adapter = adapter;
    port->netdev = dev;
    port->logical_port_id = logical_port_id;

    port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);

    port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
    if (!port->mc_list) {
        ret = -ENOMEM;
        goto out_free_ethdev;
    }

    INIT_LIST_HEAD(&port->mc_list->list);

    ret = ehea_sense_port_attr(port);
    if (ret)
        goto out_free_mc_list;

    netif_set_real_num_rx_queues(dev, port->num_def_qps);
    netif_set_real_num_tx_queues(dev, port->num_def_qps);

    port_dev = ehea_register_port(port, dn);
    if (!port_dev)
        goto out_free_mc_list;

    SET_NETDEV_DEV(dev, port_dev);

    /* initialize net_device structure */
    memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);

    dev->netdev_ops = &ehea_netdev_ops;
    ehea_set_ethtool_ops(dev);

    dev->hw_features = NETIF_F_SG | NETIF_F_TSO
              | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
    dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
              | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
              | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
              | NETIF_F_RXCSUM;
    dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
            NETIF_F_IP_CSUM;
    dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;

    INIT_WORK(&port->reset_task, ehea_reset_port);
    INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);

    init_waitqueue_head(&port->swqe_avail_wq);
    init_waitqueue_head(&port->restart_wq);

    memset(&port->stats, 0, sizeof(struct net_device_stats));
    ret = register_netdev(dev);
    if (ret) {
        pr_err("register_netdev failed. ret=%d\n", ret);
        goto out_unreg_port;
    }

    ret = ehea_get_jumboframe_status(port, &jumbo);
    if (ret)
        netdev_err(dev, "failed determining jumbo frame status\n");

    netdev_info(dev, "Jumbo frames are %sabled\n",
            jumbo == 1 ? "en" : "dis");

    adapter->active_ports++;

    return port;

out_unreg_port:
    ehea_unregister_port(port);

out_free_mc_list:
    kfree(port->mc_list);

out_free_ethdev:
    free_netdev(dev);

out_err:
    pr_err("setting up logical port with id=%d failed, ret=%d\n",
           logical_port_id, ret);
    return NULL;
}

static void ehea_shutdown_single_port(struct ehea_port *port)
{
    struct ehea_adapter *adapter = port->adapter;

    cancel_work_sync(&port->reset_task);
    cancel_delayed_work_sync(&port->stats_work);
    unregister_netdev(port->netdev);
    ehea_unregister_port(port);
    kfree(port->mc_list);
    free_netdev(port->netdev);
    adapter->active_ports--;
}

static int ehea_setup_ports(struct ehea_adapter *adapter)
{
    struct device_node *lhea_dn;
    struct device_node *eth_dn = NULL;

    const u32 *dn_log_port_id;
    int i = 0;

    lhea_dn = adapter->ofdev->dev.of_node;
    while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {

        dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
                         NULL);
        if (!dn_log_port_id) {
            pr_err("bad device node: eth_dn name=%s\n",
                   eth_dn->full_name);
            continue;
        }

        if (ehea_add_adapter_mr(adapter)) {
            pr_err("creating MR failed\n");
            of_node_put(eth_dn);
            return -EIO;
        }

        adapter->port[i] = ehea_setup_single_port(adapter,
                              *dn_log_port_id,
                              eth_dn);
        if (adapter->port[i])
            netdev_info(adapter->port[i]->netdev,
                    "logical port id #%d\n", *dn_log_port_id);
        else
            ehea_remove_adapter_mr(adapter);

        i++;
    }
    return 0;
}

static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
                       u32 logical_port_id)
{
    struct device_node *lhea_dn;
    struct device_node *eth_dn = NULL;
    const u32 *dn_log_port_id;

    lhea_dn = adapter->ofdev->dev.of_node;
    while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {

        dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
                         NULL);
        if (dn_log_port_id)
            if (*dn_log_port_id == logical_port_id)
                return eth_dn;
    }

    return NULL;
}

static ssize_t ehea_probe_port(struct device *dev,
                   struct device_attribute *attr,
                   const char *buf, size_t count)
{
    struct ehea_adapter *adapter = dev_get_drvdata(dev);
    struct ehea_port *port;
    struct device_node *eth_dn = NULL;
    int i;

    u32 logical_port_id;

    sscanf(buf, "%d", &logical_port_id);

    port = ehea_get_port(adapter, logical_port_id);

    if (port) {
        netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
                logical_port_id);
        return -EINVAL;
    }

    eth_dn = ehea_get_eth_dn(adapter, logical_port_id);

    if (!eth_dn) {
        pr_info("no logical port with id %d found\n", logical_port_id);
        return -EINVAL;
    }

    if (ehea_add_adapter_mr(adapter)) {
        pr_err("creating MR failed\n");
        return -EIO;
    }

    port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);

    of_node_put(eth_dn);

    if (port) {
        for (i = 0; i < EHEA_MAX_PORTS; i++)
            if (!adapter->port[i]) {
                adapter->port[i] = port;
                break;
            }

        netdev_info(port->netdev, "added: (logical port id=%d)\n",
                logical_port_id);
    } else {
        ehea_remove_adapter_mr(adapter);
        return -EIO;
    }

    return (ssize_t) count;
}

static ssize_t ehea_remove_port(struct device *dev,
                struct device_attribute *attr,
                const char *buf, size_t count)
{
    struct ehea_adapter *adapter = dev_get_drvdata(dev);
    struct ehea_port *port;
    int i;
    u32 logical_port_id;

    sscanf(buf, "%d", &logical_port_id);

    port = ehea_get_port(adapter, logical_port_id);

    if (port) {
        netdev_info(port->netdev, "removed: (logical port id=%d)\n",
                logical_port_id);

        ehea_shutdown_single_port(port);

        for (i = 0; i < EHEA_MAX_PORTS; i++)
            if (adapter->port[i] == port) {
                adapter->port[i] = NULL;
                break;
            }
    } else {
        pr_err("removing port with logical port id=%d failed. port not configured.\n",
               logical_port_id);
        return -EINVAL;
    }

    ehea_remove_adapter_mr(adapter);

    return (ssize_t) count;
}

static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);

static int ehea_create_device_sysfs(struct platform_device *dev)
{
    int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
    if (ret)
        goto out;

    ret = device_create_file(&dev->dev, &dev_attr_remove_port);
out:
    return ret;
}

static void ehea_remove_device_sysfs(struct platform_device *dev)
{
    device_remove_file(&dev->dev, &dev_attr_probe_port);
    device_remove_file(&dev->dev, &dev_attr_remove_port);
}

static int __devinit ehea_probe_adapter(struct platform_device *dev,
                    const struct of_device_id *id)
{
    struct ehea_adapter *adapter;
    const u64 *adapter_handle;
    int ret;
    int i;

    if (!dev || !dev->dev.of_node) {
        pr_err("Invalid ibmebus device probed\n");
        return -EINVAL;
    }

    adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
    if (!adapter) {
        ret = -ENOMEM;
        dev_err(&dev->dev, "no mem for ehea_adapter\n");
        goto out;
    }

    list_add(&adapter->list, &adapter_list);

    adapter->ofdev = dev;

    adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
                     NULL);
    if (adapter_handle)
        adapter->handle = *adapter_handle;

    if (!adapter->handle) {
        dev_err(&dev->dev, "failed getting handle for adapter"
            " '%s'\n", dev->dev.of_node->full_name);
        ret = -ENODEV;
        goto out_free_ad;
    }

    adapter->pd = EHEA_PD_ID;

    dev_set_drvdata(&dev->dev, adapter);


    /* initialize adapter and ports */
    /* get adapter properties */
    ret = ehea_sense_adapter_attr(adapter);
    if (ret) {
        dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
        goto out_free_ad;
    }

    adapter->neq = ehea_create_eq(adapter,
                      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
    if (!adapter->neq) {
        ret = -EIO;
        dev_err(&dev->dev, "NEQ creation failed\n");
        goto out_free_ad;
    }

    tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
             (unsigned long)adapter);

    ret = ehea_create_device_sysfs(dev);
    if (ret)
        goto out_kill_eq;

    ret = ehea_setup_ports(adapter);
    if (ret) {
        dev_err(&dev->dev, "setup_ports failed\n");
        goto out_rem_dev_sysfs;
    }

    ret = ibmebus_request_irq(adapter->neq->attr.ist1,
                  ehea_interrupt_neq, IRQF_DISABLED,
                  "ehea_neq", adapter);
    if (ret) {
        dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
        goto out_shutdown_ports;
    }

    /* Handle any events that might be pending. */
    tasklet_hi_schedule(&adapter->neq_tasklet);

    ret = 0;
    goto out;

out_shutdown_ports:
    for (i = 0; i < EHEA_MAX_PORTS; i++)
        if (adapter->port[i]) {
            ehea_shutdown_single_port(adapter->port[i]);
            adapter->port[i] = NULL;
        }

out_rem_dev_sysfs:
    ehea_remove_device_sysfs(dev);

out_kill_eq:
    ehea_destroy_eq(adapter->neq);

out_free_ad:
    list_del(&adapter->list);
    kfree(adapter);

out:
    ehea_update_firmware_handles();

    return ret;
}

static int __devexit ehea_remove(struct platform_device *dev)
{
    struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
    int i;

    for (i = 0; i < EHEA_MAX_PORTS; i++)
        if (adapter->port[i]) {
            ehea_shutdown_single_port(adapter->port[i]);
            adapter->port[i] = NULL;
        }

    ehea_remove_device_sysfs(dev);

    ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
    tasklet_kill(&adapter->neq_tasklet);

    ehea_destroy_eq(adapter->neq);
    ehea_remove_adapter_mr(adapter);
    list_del(&adapter->list);
    kfree(adapter);

    ehea_update_firmware_handles();

    return 0;
}

static void ehea_crash_handler(void)
{
    int i;

    if (ehea_fw_handles.arr)
        for (i = 0; i < ehea_fw_handles.num_entries; i++)
            ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
                         ehea_fw_handles.arr[i].fwh,
                         FORCE_FREE);

    if (ehea_bcmc_regs.arr)
        for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
            ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
                          ehea_bcmc_regs.arr[i].port_id,
                          ehea_bcmc_regs.arr[i].reg_type,
                          ehea_bcmc_regs.arr[i].macaddr,
                          0, H_DEREG_BCMC);
}

static int ehea_mem_notifier(struct notifier_block *nb,
                             unsigned long action, void *data)
{
    int ret = NOTIFY_BAD;
    struct memory_notify *arg = data;

    mutex_lock(&dlpar_mem_lock);

    switch (action) {
    case MEM_CANCEL_OFFLINE:
        pr_info("memory offlining canceled");
        /* Readd canceled memory block */
    case MEM_ONLINE:
        pr_info("memory is going online");
        set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
        if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
            goto out_unlock;
        ehea_rereg_mrs();
        break;
    case MEM_GOING_OFFLINE:
        pr_info("memory is going offline");
        set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
        if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
            goto out_unlock;
        ehea_rereg_mrs();
        break;
    default:
        break;
    }

    ehea_update_firmware_handles();
    ret = NOTIFY_OK;

out_unlock:
    mutex_unlock(&dlpar_mem_lock);
    return ret;
}

static struct notifier_block ehea_mem_nb = {
    .notifier_call = ehea_mem_notifier,
};

static int ehea_reboot_notifier(struct notifier_block *nb,
                unsigned long action, void *unused)
{
    if (action == SYS_RESTART) {
        pr_info("Reboot: freeing all eHEA resources\n");
        ibmebus_unregister_driver(&ehea_driver);
    }
    return NOTIFY_DONE;
}

static struct notifier_block ehea_reboot_nb = {
    .notifier_call = ehea_reboot_notifier,
};

static int check_module_parm(void)
{
    int ret = 0;

    if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
        (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
        pr_info("Bad parameter: rq1_entries\n");
        ret = -EINVAL;
    }
    if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
        (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
        pr_info("Bad parameter: rq2_entries\n");
        ret = -EINVAL;
    }
    if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
        (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
        pr_info("Bad parameter: rq3_entries\n");
        ret = -EINVAL;
    }
    if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
        (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
        pr_info("Bad parameter: sq_entries\n");
        ret = -EINVAL;
    }

    return ret;
}

static ssize_t ehea_show_capabilities(struct device_driver *drv,
                      char *buf)
{
    return sprintf(buf, "%d", EHEA_CAPABILITIES);
}

static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
           ehea_show_capabilities, NULL);

static int __init ehea_module_init(void)
{
    int ret;

    pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);

    memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
    memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));

    mutex_init(&ehea_fw_handles.lock);
    spin_lock_init(&ehea_bcmc_regs.lock);

    ret = check_module_parm();
    if (ret)
        goto out;

    ret = ehea_create_busmap();
    if (ret)
        goto out;

    ret = register_reboot_notifier(&ehea_reboot_nb);
    if (ret)
        pr_info("failed registering reboot notifier\n");

    ret = register_memory_notifier(&ehea_mem_nb);
    if (ret)
        pr_info("failed registering memory remove notifier\n");

    ret = crash_shutdown_register(ehea_crash_handler);
    if (ret)
        pr_info("failed registering crash handler\n");

    ret = ibmebus_register_driver(&ehea_driver);
    if (ret) {
        pr_err("failed registering eHEA device driver on ebus\n");
        goto out2;
    }

    ret = driver_create_file(&ehea_driver.driver,
                 &driver_attr_capabilities);
    if (ret) {
        pr_err("failed to register capabilities attribute, ret=%d\n",
               ret);
        goto out3;
    }

    return ret;

out3:
    ibmebus_unregister_driver(&ehea_driver);
out2:
    unregister_memory_notifier(&ehea_mem_nb);
    unregister_reboot_notifier(&ehea_reboot_nb);
    crash_shutdown_unregister(ehea_crash_handler);
out:
    return ret;
}

static void __exit ehea_module_exit(void)
{
    int ret;

    driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
    ibmebus_unregister_driver(&ehea_driver);
    unregister_reboot_notifier(&ehea_reboot_nb);
    ret = crash_shutdown_unregister(ehea_crash_handler);
    if (ret)
        pr_info("failed unregistering crash handler\n");
    unregister_memory_notifier(&ehea_mem_nb);
    kfree(ehea_fw_handles.arr);
    kfree(ehea_bcmc_regs.arr);
    ehea_destroy_busmap();
}

module_init(ehea_module_init);
module_exit(ehea_module_exit);