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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  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 <raisch@de.ibm.com>
  *   Jan-Bernd Themann <themann@de.ibm.com>
  *   Thomas Klein <tklein@de.ibm.com>
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/device.h>
 #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 <linux/of.h>
 #include <linux/of_device.h>
 
 #include <net/ip.h>
 
 #include "ehea.h"
 #include "ehea_qmr.h"
 #include "ehea_phyp.h"
 
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
 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 = [7..14]. Default = "
          __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
          "[2^x - 1], x = [7..14]. Default = "
          __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
          "[2^x - 1], x = [7..14]. Default = "
          __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
          "[2^x - 1], x = [7..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 ehea_probe_adapter(struct platform_device *dev);
 
 static int ehea_remove(struct platform_device *dev);
 
 static const struct of_device_id ehea_module_device_table[] = {
     {
         .name = "lhea",
         .compatible = "IBM,lhea",
     },
     {
         .type = "network",
         .compatible = "IBM,lhea-ethernet",
     },
     {},
 };
 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 
 static const struct of_device_id ehea_device_table[] = {
     {
         .name = "lhea",
         .compatible = "IBM,lhea",
     },
     {},
 };
 MODULE_DEVICE_TABLE(of, ehea_device_table);
 
 static struct 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 void 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;
 }
 
 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]) {
                 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])
             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_consume_skb_any(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)
                         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, htons(ETH_P_8021Q),
                                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;
 
     for (i = 0; i < port->num_def_qps; i++) {
         struct ehea_port_res *pr = &port->port_res[i];
         int ret;
         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_consume_skb_any(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;
 }
 
 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);
     if (!port) {
         netdev_err(NULL, "unknown portnum %x\n", portnum);
         return;
     }
     dev = port->netdev;
 
     switch (ec) {
     case EHEA_EC_PORTSTATE_CHG: /* port state change */
 
         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(struct tasklet_struct *t)
 {
     struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
     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,
                   0, 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,
                       0, 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 = tx_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++)
             dev_kfree_skb(pr->rq1_skba.arr[i]);
 
         for (i = 0; i < pr->rq2_skba.len; i++)
             dev_kfree_skb(pr->rq2_skba.arr[i]);
 
         for (i = 0; i < pr->rq3_skba.len; i++)
             dev_kfree_skb(pr->rq3_skba.arr[i]);
 
         for (i = 0; i < pr->sq_skba.len; 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 = skb_tcp_all_headers(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;
     }
 
     eth_hw_addr_set(dev, mac_addr->sa_data);
 
     /* 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)
         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 void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
 {
     swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
 
     if (vlan_get_protocol(skb) != 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_consume_skb_any(skb);
 }
 
 static netdev_tx_t 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 (skb_vlan_tag_present(skb)) {
         swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
         swqe->vlan_tag = skb_vlan_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, __be16 proto, u16 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, __be16 proto, u16 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");
 
     netif_carrier_off(dev);
 
     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)
         return -ENOMEM;
 
     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");
             ret = -EFAULT;
             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");
             ret = -EFAULT;
             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");
             ret = -EFAULT;
             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, unsigned int txqueue)
 {
     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 log_port_id_show(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_RO(log_port_id);
 
 static void 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,
     .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_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 */
     eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
 
     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_CTAG_TX;
     dev->features = NETIF_F_SG | NETIF_F_TSO |
               NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
               NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
               NETIF_F_HW_VLAN_CTAG_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;
 
     /* MTU range: 68 - 9022 */
     dev->min_mtu = ETH_MIN_MTU;
     dev->max_mtu = EHEA_MAX_PACKET_SIZE;
 
     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);
 
     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=%pOF\n", eth_dn);
             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 probe_port_store(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");
         of_node_put(eth_dn);
         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 remove_port_store(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_WO(probe_port);
 static DEVICE_ATTR_WO(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 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 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");
         fallthrough;    /* re-add 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 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 atomic_t ehea_memory_hooks_registered;
 
 /* Register memory hooks on probe of first adapter */
 static int ehea_register_memory_hooks(void)
 {
     int ret = 0;
 
     if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
         return 0;
 
     ret = ehea_create_busmap();
     if (ret) {
         pr_info("ehea_create_busmap failed\n");
         goto out;
     }
 
     ret = register_reboot_notifier(&ehea_reboot_nb);
     if (ret) {
         pr_info("register_reboot_notifier failed\n");
         goto out;
     }
 
     ret = register_memory_notifier(&ehea_mem_nb);
     if (ret) {
         pr_info("register_memory_notifier failed\n");
         goto out2;
     }
 
     ret = crash_shutdown_register(ehea_crash_handler);
     if (ret) {
         pr_info("crash_shutdown_register failed\n");
         goto out3;
     }
 
     return 0;
 
 out3:
     unregister_memory_notifier(&ehea_mem_nb);
 out2:
     unregister_reboot_notifier(&ehea_reboot_nb);
 out:
     atomic_dec(&ehea_memory_hooks_registered);
     return ret;
 }
 
 static void ehea_unregister_memory_hooks(void)
 {
     /* Only remove the hooks if we've registered them */
     if (atomic_read(&ehea_memory_hooks_registered) == 0)
         return;
 
     unregister_reboot_notifier(&ehea_reboot_nb);
     if (crash_shutdown_unregister(ehea_crash_handler))
         pr_info("failed unregistering crash handler\n");
     unregister_memory_notifier(&ehea_mem_nb);
 }
 
 static int ehea_probe_adapter(struct platform_device *dev)
 {
     struct ehea_adapter *adapter;
     const u64 *adapter_handle;
     int ret;
     int i;
 
     ret = ehea_register_memory_hooks();
     if (ret)
         return ret;
 
     if (!dev || !dev->dev.of_node) {
         pr_err("Invalid ibmebus device probed\n");
         return -EINVAL;
     }
 
     adapter = devm_kzalloc(&dev->dev, 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"
             " '%pOF'\n", dev->dev.of_node);
         ret = -ENODEV;
         goto out_free_ad;
     }
 
     adapter->pd = EHEA_PD_ID;
 
     platform_set_drvdata(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_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
 
     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, 0,
                   "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);
 
 out:
     ehea_update_firmware_handles();
 
     return ret;
 }
 
 static int ehea_remove(struct platform_device *dev)
 {
     struct ehea_adapter *adapter = platform_get_drvdata(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);
 
     ehea_update_firmware_handles();
 
     return 0;
 }
 
 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 capabilities_show(struct device_driver *drv, char *buf)
 {
     return sprintf(buf, "%d", EHEA_CAPABILITIES);
 }
 
 static DRIVER_ATTR_RO(capabilities);
 
 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 = ibmebus_register_driver(&ehea_driver);
     if (ret) {
         pr_err("failed registering eHEA device driver on ebus\n");
         goto out;
     }
 
     ret = driver_create_file(&ehea_driver.driver,
                  &driver_attr_capabilities);
     if (ret) {
         pr_err("failed to register capabilities attribute, ret=%d\n",
                ret);
         goto out2;
     }
 
     return ret;
 
 out2:
     ibmebus_unregister_driver(&ehea_driver);
 out:
     return ret;
 }
 
 static void __exit ehea_module_exit(void)
 {
     driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
     ibmebus_unregister_driver(&ehea_driver);
     ehea_unregister_memory_hooks();
     kfree(ehea_fw_handles.arr);
     kfree(ehea_bcmc_regs.arr);
     ehea_destroy_busmap();
 }
 
 module_init(ehea_module_init);
 module_exit(ehea_module_exit);