drivers/net/ethernet/ibm/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int use_lro;
  66 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  67 static int num_tx_qps = EHEA_NUM_TX_QP;
  68 static int prop_carrier_state;
  69
  70 module_param(msg_level, int, 0);
  71 module_param(rq1_entries, int, 0);
  72 module_param(rq2_entries, int, 0);
  73 module_param(rq3_entries, int, 0);
  74 module_param(sq_entries, int, 0);
  75 module_param(prop_carrier_state, int, 0);
  76 module_param(use_mcs, int, 0);
  77 module_param(use_lro, int, 0);
  78 module_param(lro_max_aggr, int, 0);
  79 module_param(num_tx_qps, int, 0);
  80
  81 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  82 MODULE_PARM_DESC(msg_level, "msg_level");
  83 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  84                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  85 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  88 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  91 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  94 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  95                  "[2^x - 1], x = [6..14]. Default = "
  96                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  97 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  98                  "Default = 1");
  99
 100 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
 101                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 102 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 103                  "Default = 0");
 104
 105 static int port_name_cnt;
 106 static LIST_HEAD(adapter_list);
 107 static unsigned long ehea_driver_flags;
 108 static DEFINE_MUTEX(dlpar_mem_lock);
 109 struct ehea_fw_handle_array ehea_fw_handles;
 110 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 111
 112
 113 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 114                                         const struct of_device_id *id);
 115
 116 static int __devexit ehea_remove(struct platform_device *dev);
 117
 118 static struct of_device_id ehea_device_table[] = {
 119         {
 120                 .name = "lhea",
 121                 .compatible = "IBM,lhea",
 122         },
 123         {},
 124 };
 125 MODULE_DEVICE_TABLE(of, ehea_device_table);
 126
 127 static struct of_platform_driver ehea_driver = {
 128         .driver = {
 129                 .name = "ehea",
 130                 .owner = THIS_MODULE,
 131                 .of_match_table = ehea_device_table,
 132         },
 133         .probe = ehea_probe_adapter,
 134         .remove = ehea_remove,
 135 };
 136
 137 void ehea_dump(void *adr, int len, char *msg)
 138 {
 139         int x;
 140         unsigned char *deb = adr;
 141         for (x = 0; x < len; x += 16) {
 142                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 143                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 144                 deb += 16;
 145         }
 146 }
 147
 148 void ehea_schedule_port_reset(struct ehea_port *port)
 149 {
 150         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 151                 schedule_work(&port->reset_task);
 152 }
 153
 154 static void ehea_update_firmware_handles(void)
 155 {
 156         struct ehea_fw_handle_entry *arr = NULL;
 157         struct ehea_adapter *adapter;
 158         int num_adapters = 0;
 159         int num_ports = 0;
 160         int num_portres = 0;
 161         int i = 0;
 162         int num_fw_handles, k, l;
 163
 164         /* Determine number of handles */
 165         mutex_lock(&ehea_fw_handles.lock);
 166
 167         list_for_each_entry(adapter, &adapter_list, list) {
 168                 num_adapters++;
 169
 170                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 171                         struct ehea_port *port = adapter->port[k];
 172
 173                         if (!port || (port->state != EHEA_PORT_UP))
 174                                 continue;
 175
 176                         num_ports++;
 177                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 178                 }
 179         }
 180
 181         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 182                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 183                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 184
 185         if (num_fw_handles) {
 186                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 187                 if (!arr)
 188                         goto out;  /* Keep the existing array */
 189         } else
 190                 goto out_update;
 191
 192         list_for_each_entry(adapter, &adapter_list, list) {
 193                 if (num_adapters == 0)
 194                         break;
 195
 196                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 197                         struct ehea_port *port = adapter->port[k];
 198
 199                         if (!port || (port->state != EHEA_PORT_UP) ||
 200                             (num_ports == 0))
 201                                 continue;
 202
 203                         for (l = 0;
 204                              l < port->num_def_qps + port->num_add_tx_qps;
 205                              l++) {
 206                                 struct ehea_port_res *pr = &port->port_res[l];
 207
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->qp->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->send_cq->fw_handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 214                                 arr[i].adh = adapter->handle;
 215                                 arr[i++].fwh = pr->eq->fw_handle;
 216                                 arr[i].adh = adapter->handle;
 217                                 arr[i++].fwh = pr->send_mr.handle;
 218                                 arr[i].adh = adapter->handle;
 219                                 arr[i++].fwh = pr->recv_mr.handle;
 220                         }
 221                         arr[i].adh = adapter->handle;
 222                         arr[i++].fwh = port->qp_eq->fw_handle;
 223                         num_ports--;
 224                 }
 225
 226                 arr[i].adh = adapter->handle;
 227                 arr[i++].fwh = adapter->neq->fw_handle;
 228
 229                 if (adapter->mr.handle) {
 230                         arr[i].adh = adapter->handle;
 231                         arr[i++].fwh = adapter->mr.handle;
 232                 }
 233                 num_adapters--;
 234         }
 235
 236 out_update:
 237         kfree(ehea_fw_handles.arr);
 238         ehea_fw_handles.arr = arr;
 239         ehea_fw_handles.num_entries = i;
 240 out:
 241         mutex_unlock(&ehea_fw_handles.lock);
 242 }
 243
 244 static void ehea_update_bcmc_registrations(void)
 245 {
 246         unsigned long flags;
 247         struct ehea_bcmc_reg_entry *arr = NULL;
 248         struct ehea_adapter *adapter;
 249         struct ehea_mc_list *mc_entry;
 250         int num_registrations = 0;
 251         int i = 0;
 252         int k;
 253
 254         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 255
 256         /* Determine number of registrations */
 257         list_for_each_entry(adapter, &adapter_list, list)
 258                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 259                         struct ehea_port *port = adapter->port[k];
 260
 261                         if (!port || (port->state != EHEA_PORT_UP))
 262                                 continue;
 263
 264                         num_registrations += 2; /* Broadcast registrations */
 265
 266                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 267                                 num_registrations += 2;
 268                 }
 269
 270         if (num_registrations) {
 271                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 272                 if (!arr)
 273                         goto out;  /* Keep the existing array */
 274         } else
 275                 goto out_update;
 276
 277         list_for_each_entry(adapter, &adapter_list, list) {
 278                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 279                         struct ehea_port *port = adapter->port[k];
 280
 281                         if (!port || (port->state != EHEA_PORT_UP))
 282                                 continue;
 283
 284                         if (num_registrations == 0)
 285                                 goto out_update;
 286
 287                         arr[i].adh = adapter->handle;
 288                         arr[i].port_id = port->logical_port_id;
 289                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 290                                           EHEA_BCMC_UNTAGGED;
 291                         arr[i++].macaddr = port->mac_addr;
 292
 293                         arr[i].adh = adapter->handle;
 294                         arr[i].port_id = port->logical_port_id;
 295                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 296                                           EHEA_BCMC_VLANID_ALL;
 297                         arr[i++].macaddr = port->mac_addr;
 298                         num_registrations -= 2;
 299
 300                         list_for_each_entry(mc_entry,
 301                                             &port->mc_list->list, list) {
 302                                 if (num_registrations == 0)
 303                                         goto out_update;
 304
 305                                 arr[i].adh = adapter->handle;
 306                                 arr[i].port_id = port->logical_port_id;
 307                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 308                                                   EHEA_BCMC_MULTICAST |
 309                                                   EHEA_BCMC_UNTAGGED;
 310                                 arr[i++].macaddr = mc_entry->macaddr;
 311
 312                                 arr[i].adh = adapter->handle;
 313                                 arr[i].port_id = port->logical_port_id;
 314                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 315                                                   EHEA_BCMC_MULTICAST |
 316                                                   EHEA_BCMC_VLANID_ALL;
 317                                 arr[i++].macaddr = mc_entry->macaddr;
 318                                 num_registrations -= 2;
 319                         }
 320                 }
 321         }
 322
 323 out_update:
 324         kfree(ehea_bcmc_regs.arr);
 325         ehea_bcmc_regs.arr = arr;
 326         ehea_bcmc_regs.num_entries = i;
 327 out:
 328         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 329 }
 330
 331 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 332 {
 333         struct ehea_port *port = netdev_priv(dev);
 334         struct net_device_stats *stats = &port->stats;
 335         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 336         int i;
 337
 338         for (i = 0; i < port->num_def_qps; i++) {
 339                 rx_packets += port->port_res[i].rx_packets;
 340                 rx_bytes   += port->port_res[i].rx_bytes;
 341         }
 342
 343         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 344                 tx_packets += port->port_res[i].tx_packets;
 345                 tx_bytes   += port->port_res[i].tx_bytes;
 346         }
 347
 348         stats->tx_packets = tx_packets;
 349         stats->rx_bytes = rx_bytes;
 350         stats->tx_bytes = tx_bytes;
 351         stats->rx_packets = rx_packets;
 352
 353         return &port->stats;
 354 }
 355
 356 static void ehea_update_stats(struct work_struct *work)
 357 {
 358         struct ehea_port *port =
 359                 container_of(work, struct ehea_port, stats_work.work);
 360         struct net_device *dev = port->netdev;
 361         struct net_device_stats *stats = &port->stats;
 362         struct hcp_ehea_port_cb2 *cb2;
 363         u64 hret;
 364
 365         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 366         if (!cb2) {
 367                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 368                 goto resched;
 369         }
 370
 371         hret = ehea_h_query_ehea_port(port->adapter->handle,
 372                                       port->logical_port_id,
 373                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 374         if (hret != H_SUCCESS) {
 375                 netdev_err(dev, "query_ehea_port failed\n");
 376                 goto out_herr;
 377         }
 378
 379         if (netif_msg_hw(port))
 380                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 381
 382         stats->multicast = cb2->rxmcp;
 383         stats->rx_errors = cb2->rxuerr;
 384
 385 out_herr:
 386         free_page((unsigned long)cb2);
 387 resched:
 388         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 389 }
 390
 391 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 392 {
 393         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 394         struct net_device *dev = pr->port->netdev;
 395         int max_index_mask = pr->rq1_skba.len - 1;
 396         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 397         int adder = 0;
 398         int i;
 399
 400         pr->rq1_skba.os_skbs = 0;
 401
 402         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 403                 if (nr_of_wqes > 0)
 404                         pr->rq1_skba.index = index;
 405                 pr->rq1_skba.os_skbs = fill_wqes;
 406                 return;
 407         }
 408
 409         for (i = 0; i < fill_wqes; i++) {
 410                 if (!skb_arr_rq1[index]) {
 411                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 412                                                               EHEA_L_PKT_SIZE);
 413                         if (!skb_arr_rq1[index]) {
 414                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 415                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 416                                 break;
 417                         }
 418                 }
 419                 index--;
 420                 index &= max_index_mask;
 421                 adder++;
 422         }
 423
 424         if (adder == 0)
 425                 return;
 426
 427         /* Ring doorbell */
 428         ehea_update_rq1a(pr->qp, adder);
 429 }
 430
 431 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 432 {
 433         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 434         struct net_device *dev = pr->port->netdev;
 435         int i;
 436
 437         if (nr_rq1a > pr->rq1_skba.len) {
 438                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 439                 return;
 440         }
 441
 442         for (i = 0; i < nr_rq1a; i++) {
 443                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 444                 if (!skb_arr_rq1[i]) {
 445                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 446                         break;
 447                 }
 448         }
 449         /* Ring doorbell */
 450         ehea_update_rq1a(pr->qp, i - 1);
 451 }
 452
 453 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 454                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 455                               int num_wqes, int wqe_type, int packet_size)
 456 {
 457         struct net_device *dev = pr->port->netdev;
 458         struct ehea_qp *qp = pr->qp;
 459         struct sk_buff **skb_arr = q_skba->arr;
 460         struct ehea_rwqe *rwqe;
 461         int i, index, max_index_mask, fill_wqes;
 462         int adder = 0;
 463         int ret = 0;
 464
 465         fill_wqes = q_skba->os_skbs + num_wqes;
 466         q_skba->os_skbs = 0;
 467
 468         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 469                 q_skba->os_skbs = fill_wqes;
 470                 return ret;
 471         }
 472
 473         index = q_skba->index;
 474         max_index_mask = q_skba->len - 1;
 475         for (i = 0; i < fill_wqes; i++) {
 476                 u64 tmp_addr;
 477                 struct sk_buff *skb;
 478
 479                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 480                 if (!skb) {
 481                         q_skba->os_skbs = fill_wqes - i;
 482                         if (q_skba->os_skbs == q_skba->len - 2) {
 483                                 netdev_info(pr->port->netdev,
 484                                             "rq%i ran dry - no mem for skb\n",
 485                                             rq_nr);
 486                                 ret = -ENOMEM;
 487                         }
 488                         break;
 489                 }
 490
 491                 skb_arr[index] = skb;
 492                 tmp_addr = ehea_map_vaddr(skb->data);
 493                 if (tmp_addr == -1) {
 494                         dev_kfree_skb(skb);
 495                         q_skba->os_skbs = fill_wqes - i;
 496                         ret = 0;
 497                         break;
 498                 }
 499
 500                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 501                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 502                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 503                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 504                 rwqe->sg_list[0].vaddr = tmp_addr;
 505                 rwqe->sg_list[0].len = packet_size;
 506                 rwqe->data_segments = 1;
 507
 508                 index++;
 509                 index &= max_index_mask;
 510                 adder++;
 511         }
 512
 513         q_skba->index = index;
 514         if (adder == 0)
 515                 goto out;
 516
 517         /* Ring doorbell */
 518         iosync();
 519         if (rq_nr == 2)
 520                 ehea_update_rq2a(pr->qp, adder);
 521         else
 522                 ehea_update_rq3a(pr->qp, adder);
 523 out:
 524         return ret;
 525 }
 526
 527
 528 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 529 {
 530         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 531                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 532                                   EHEA_RQ2_PKT_SIZE);
 533 }
 534
 535
 536 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 537 {
 538         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 539                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 540                                   EHEA_MAX_PACKET_SIZE);
 541 }
 542
 543 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 544 {
 545         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 546         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 547                 return 0;
 548         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 549             (cqe->header_length == 0))
 550                 return 0;
 551         return -EINVAL;
 552 }
 553
 554 static inline void ehea_fill_skb(struct net_device *dev,
 555                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 556                                  struct ehea_port_res *pr)
 557 {
 558         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 559
 560         skb_put(skb, length);
 561         skb->protocol = eth_type_trans(skb, dev);
 562
 563         /* The packet was not an IPV4 packet so a complemented checksum was
 564            calculated. The value is found in the Internet Checksum field. */
 565         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 566                 skb->ip_summed = CHECKSUM_COMPLETE;
 567                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 568         } else
 569                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 570
 571         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 572 }
 573
 574 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 575                                                int arr_len,
 576                                                struct ehea_cqe *cqe)
 577 {
 578         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 579         struct sk_buff *skb;
 580         void *pref;
 581         int x;
 582
 583         x = skb_index + 1;
 584         x &= (arr_len - 1);
 585
 586         pref = skb_array[x];
 587         if (pref) {
 588                 prefetchw(pref);
 589                 prefetchw(pref + EHEA_CACHE_LINE);
 590
 591                 pref = (skb_array[x]->data);
 592                 prefetch(pref);
 593                 prefetch(pref + EHEA_CACHE_LINE);
 594                 prefetch(pref + EHEA_CACHE_LINE * 2);
 595                 prefetch(pref + EHEA_CACHE_LINE * 3);
 596         }
 597
 598         skb = skb_array[skb_index];
 599         skb_array[skb_index] = NULL;
 600         return skb;
 601 }
 602
 603 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 604                                                   int arr_len, int wqe_index)
 605 {
 606         struct sk_buff *skb;
 607         void *pref;
 608         int x;
 609
 610         x = wqe_index + 1;
 611         x &= (arr_len - 1);
 612
 613         pref = skb_array[x];
 614         if (pref) {
 615                 prefetchw(pref);
 616                 prefetchw(pref + EHEA_CACHE_LINE);
 617
 618                 pref = (skb_array[x]->data);
 619                 prefetchw(pref);
 620                 prefetchw(pref + EHEA_CACHE_LINE);
 621         }
 622
 623         skb = skb_array[wqe_index];
 624         skb_array[wqe_index] = NULL;
 625         return skb;
 626 }
 627
 628 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 629                                  struct ehea_cqe *cqe, int *processed_rq2,
 630                                  int *processed_rq3)
 631 {
 632         struct sk_buff *skb;
 633
 634         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 635                 pr->p_stats.err_tcp_cksum++;
 636         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 637                 pr->p_stats.err_ip_cksum++;
 638         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 639                 pr->p_stats.err_frame_crc++;
 640
 641         if (rq == 2) {
 642                 *processed_rq2 += 1;
 643                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 644                 dev_kfree_skb(skb);
 645         } else if (rq == 3) {
 646                 *processed_rq3 += 1;
 647                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 648                 dev_kfree_skb(skb);
 649         }
 650
 651         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 652                 if (netif_msg_rx_err(pr->port)) {
 653                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 654                                pr->qp->init_attr.qp_nr);
 655                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 656                 }
 657                 ehea_schedule_port_reset(pr->port);
 658                 return 1;
 659         }
 660
 661         return 0;
 662 }
 663
 664 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 665                        void **tcph, u64 *hdr_flags, void *priv)
 666 {
 667         struct ehea_cqe *cqe = priv;
 668         unsigned int ip_len;
 669         struct iphdr *iph;
 670
 671         /* non tcp/udp packets */
 672         if (!cqe->header_length)
 673                 return -1;
 674
 675         /* non tcp packet */
 676         skb_reset_network_header(skb);
 677         iph = ip_hdr(skb);
 678         if (iph->protocol != IPPROTO_TCP)
 679                 return -1;
 680
 681         ip_len = ip_hdrlen(skb);
 682         skb_set_transport_header(skb, ip_len);
 683         *tcph = tcp_hdr(skb);
 684
 685         /* check if ip header and tcp header are complete */
 686         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 687                 return -1;
 688
 689         *hdr_flags = LRO_IPV4 | LRO_TCP;
 690         *iphdr = iph;
 691
 692         return 0;
 693 }
 694
 695 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 696                           struct sk_buff *skb)
 697 {
 698         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 699                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 700
 701         if (skb->dev->features & NETIF_F_LRO)
 702                 lro_receive_skb(&pr->lro_mgr, skb, cqe);
 703         else
 704                 netif_receive_skb(skb);
 705 }
 706
 707 static int ehea_proc_rwqes(struct net_device *dev,
 708                            struct ehea_port_res *pr,
 709                            int budget)
 710 {
 711         struct ehea_port *port = pr->port;
 712         struct ehea_qp *qp = pr->qp;
 713         struct ehea_cqe *cqe;
 714         struct sk_buff *skb;
 715         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 716         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 717         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 718         int skb_arr_rq1_len = pr->rq1_skba.len;
 719         int skb_arr_rq2_len = pr->rq2_skba.len;
 720         int skb_arr_rq3_len = pr->rq3_skba.len;
 721         int processed, processed_rq1, processed_rq2, processed_rq3;
 722         u64 processed_bytes = 0;
 723         int wqe_index, last_wqe_index, rq, port_reset;
 724
 725         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 726         last_wqe_index = 0;
 727
 728         cqe = ehea_poll_rq1(qp, &wqe_index);
 729         while ((processed < budget) && cqe) {
 730                 ehea_inc_rq1(qp);
 731                 processed_rq1++;
 732                 processed++;
 733                 if (netif_msg_rx_status(port))
 734                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 735
 736                 last_wqe_index = wqe_index;
 737                 rmb();
 738                 if (!ehea_check_cqe(cqe, &rq)) {
 739                         if (rq == 1) {
 740                                 /* LL RQ1 */
 741                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 742                                                           skb_arr_rq1_len,
 743                                                           wqe_index);
 744                                 if (unlikely(!skb)) {
 745                                         netif_info(port, rx_err, dev,
 746                                                   "LL rq1: skb=NULL\n");
 747
 748                                         skb = netdev_alloc_skb(dev,
 749                                                                EHEA_L_PKT_SIZE);
 750                                         if (!skb) {
 751                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 752                                                 break;
 753                                         }
 754                                 }
 755                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 756                                                  cqe->num_bytes_transfered - 4);
 757                                 ehea_fill_skb(dev, skb, cqe, pr);
 758                         } else if (rq == 2) {
 759                                 /* RQ2 */
 760                                 skb = get_skb_by_index(skb_arr_rq2,
 761                                                        skb_arr_rq2_len, cqe);
 762                                 if (unlikely(!skb)) {
 763                                         netif_err(port, rx_err, dev,
 764                                                   "rq2: skb=NULL\n");
 765                                         break;
 766                                 }
 767                                 ehea_fill_skb(dev, skb, cqe, pr);
 768                                 processed_rq2++;
 769                         } else {
 770                                 /* RQ3 */
 771                                 skb = get_skb_by_index(skb_arr_rq3,
 772                                                        skb_arr_rq3_len, cqe);
 773                                 if (unlikely(!skb)) {
 774                                         netif_err(port, rx_err, dev,
 775                                                   "rq3: skb=NULL\n");
 776                                         break;
 777                                 }
 778                                 ehea_fill_skb(dev, skb, cqe, pr);
 779                                 processed_rq3++;
 780                         }
 781
 782                         processed_bytes += skb->len;
 783                         ehea_proc_skb(pr, cqe, skb);
 784                 } else {
 785                         pr->p_stats.poll_receive_errors++;
 786                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 787                                                            &processed_rq2,
 788                                                            &processed_rq3);
 789                         if (port_reset)
 790                                 break;
 791                 }
 792                 cqe = ehea_poll_rq1(qp, &wqe_index);
 793         }
 794         if (dev->features & NETIF_F_LRO)
 795                 lro_flush_all(&pr->lro_mgr);
 796
 797         pr->rx_packets += processed;
 798         pr->rx_bytes += processed_bytes;
 799
 800         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 801         ehea_refill_rq2(pr, processed_rq2);
 802         ehea_refill_rq3(pr, processed_rq3);
 803
 804         return processed;
 805 }
 806
 807 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 808
 809 static void reset_sq_restart_flag(struct ehea_port *port)
 810 {
 811         int i;
 812
 813         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 814                 struct ehea_port_res *pr = &port->port_res[i];
 815                 pr->sq_restart_flag = 0;
 816         }
 817         wake_up(&port->restart_wq);
 818 }
 819
 820 static void check_sqs(struct ehea_port *port)
 821 {
 822         struct ehea_swqe *swqe;
 823         int swqe_index;
 824         int i, k;
 825
 826         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 827                 struct ehea_port_res *pr = &port->port_res[i];
 828                 int ret;
 829                 k = 0;
 830                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 831                 memset(swqe, 0, SWQE_HEADER_SIZE);
 832                 atomic_dec(&pr->swqe_avail);
 833
 834                 swqe->tx_control |= EHEA_SWQE_PURGE;
 835                 swqe->wr_id = SWQE_RESTART_CHECK;
 836                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 837                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 838                 swqe->immediate_data_length = 80;
 839
 840                 ehea_post_swqe(pr->qp, swqe);
 841
 842                 ret = wait_event_timeout(port->restart_wq,
 843                                          pr->sq_restart_flag == 0,
 844                                          msecs_to_jiffies(100));
 845
 846                 if (!ret) {
 847                         pr_err("HW/SW queues out of sync\n");
 848                         ehea_schedule_port_reset(pr->port);
 849                         return;
 850                 }
 851         }
 852 }
 853
 854
 855 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 856 {
 857         struct sk_buff *skb;
 858         struct ehea_cq *send_cq = pr->send_cq;
 859         struct ehea_cqe *cqe;
 860         int quota = my_quota;
 861         int cqe_counter = 0;
 862         int swqe_av = 0;
 863         int index;
 864         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 865                                                 pr - &pr->port->port_res[0]);
 866
 867         cqe = ehea_poll_cq(send_cq);
 868         while (cqe && (quota > 0)) {
 869                 ehea_inc_cq(send_cq);
 870
 871                 cqe_counter++;
 872                 rmb();
 873
 874                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 875                         pr->sq_restart_flag = 1;
 876                         swqe_av++;
 877                         break;
 878                 }
 879
 880                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 881                         pr_err("Bad send completion status=0x%04X\n",
 882                                cqe->status);
 883
 884                         if (netif_msg_tx_err(pr->port))
 885                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 886
 887                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 888                                 pr_err("Resetting port\n");
 889                                 ehea_schedule_port_reset(pr->port);
 890                                 break;
 891                         }
 892                 }
 893
 894                 if (netif_msg_tx_done(pr->port))
 895                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 896
 897                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 898                            == EHEA_SWQE2_TYPE)) {
 899
 900                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 901                         skb = pr->sq_skba.arr[index];
 902                         dev_kfree_skb(skb);
 903                         pr->sq_skba.arr[index] = NULL;
 904                 }
 905
 906                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 907                 quota--;
 908
 909                 cqe = ehea_poll_cq(send_cq);
 910         }
 911
 912         ehea_update_feca(send_cq, cqe_counter);
 913         atomic_add(swqe_av, &pr->swqe_avail);
 914
 915         if (unlikely(netif_tx_queue_stopped(txq) &&
 916                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 917                 __netif_tx_lock(txq, smp_processor_id());
 918                 if (netif_tx_queue_stopped(txq) &&
 919                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 920                         netif_tx_wake_queue(txq);
 921                 __netif_tx_unlock(txq);
 922         }
 923
 924         wake_up(&pr->port->swqe_avail_wq);
 925
 926         return cqe;
 927 }
 928
 929 #define EHEA_POLL_MAX_CQES 65535
 930
 931 static int ehea_poll(struct napi_struct *napi, int budget)
 932 {
 933         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 934                                                 napi);
 935         struct net_device *dev = pr->port->netdev;
 936         struct ehea_cqe *cqe;
 937         struct ehea_cqe *cqe_skb = NULL;
 938         int wqe_index;
 939         int rx = 0;
 940
 941         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 942         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 943
 944         while (rx != budget) {
 945                 napi_complete(napi);
 946                 ehea_reset_cq_ep(pr->recv_cq);
 947                 ehea_reset_cq_ep(pr->send_cq);
 948                 ehea_reset_cq_n1(pr->recv_cq);
 949                 ehea_reset_cq_n1(pr->send_cq);
 950                 rmb();
 951                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 952                 cqe_skb = ehea_poll_cq(pr->send_cq);
 953
 954                 if (!cqe && !cqe_skb)
 955                         return rx;
 956
 957                 if (!napi_reschedule(napi))
 958                         return rx;
 959
 960                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 961                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 962         }
 963
 964         return rx;
 965 }
 966
 967 #ifdef CONFIG_NET_POLL_CONTROLLER
 968 static void ehea_netpoll(struct net_device *dev)
 969 {
 970         struct ehea_port *port = netdev_priv(dev);
 971         int i;
 972
 973         for (i = 0; i < port->num_def_qps; i++)
 974                 napi_schedule(&port->port_res[i].napi);
 975 }
 976 #endif
 977
 978 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 979 {
 980         struct ehea_port_res *pr = param;
 981
 982         napi_schedule(&pr->napi);
 983
 984         return IRQ_HANDLED;
 985 }
 986
 987 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 988 {
 989         struct ehea_port *port = param;
 990         struct ehea_eqe *eqe;
 991         struct ehea_qp *qp;
 992         u32 qp_token;
 993         u64 resource_type, aer, aerr;
 994         int reset_port = 0;
 995
 996         eqe = ehea_poll_eq(port->qp_eq);
 997
 998         while (eqe) {
 999                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1000                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1001                        eqe->entry, qp_token);
1002
1003                 qp = port->port_res[qp_token].qp;
1004
1005                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1006                                                 &aer, &aerr);
1007
1008                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1009                         if ((aer & EHEA_AER_RESET_MASK) ||
1010                             (aerr & EHEA_AERR_RESET_MASK))
1011                                  reset_port = 1;
1012                 } else
1013                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1014
1015                 eqe = ehea_poll_eq(port->qp_eq);
1016         }
1017
1018         if (reset_port) {
1019                 pr_err("Resetting port\n");
1020                 ehea_schedule_port_reset(port);
1021         }
1022
1023         return IRQ_HANDLED;
1024 }
1025
1026 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1027                                        int logical_port)
1028 {
1029         int i;
1030
1031         for (i = 0; i < EHEA_MAX_PORTS; i++)
1032                 if (adapter->port[i])
1033                         if (adapter->port[i]->logical_port_id == logical_port)
1034                                 return adapter->port[i];
1035         return NULL;
1036 }
1037
1038 int ehea_sense_port_attr(struct ehea_port *port)
1039 {
1040         int ret;
1041         u64 hret;
1042         struct hcp_ehea_port_cb0 *cb0;
1043
1044         /* may be called via ehea_neq_tasklet() */
1045         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1046         if (!cb0) {
1047                 pr_err("no mem for cb0\n");
1048                 ret = -ENOMEM;
1049                 goto out;
1050         }
1051
1052         hret = ehea_h_query_ehea_port(port->adapter->handle,
1053                                       port->logical_port_id, H_PORT_CB0,
1054                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1055                                       cb0);
1056         if (hret != H_SUCCESS) {
1057                 ret = -EIO;
1058                 goto out_free;
1059         }
1060
1061         /* MAC address */
1062         port->mac_addr = cb0->port_mac_addr << 16;
1063
1064         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1065                 ret = -EADDRNOTAVAIL;
1066                 goto out_free;
1067         }
1068
1069         /* Port speed */
1070         switch (cb0->port_speed) {
1071         case H_SPEED_10M_H:
1072                 port->port_speed = EHEA_SPEED_10M;
1073                 port->full_duplex = 0;
1074                 break;
1075         case H_SPEED_10M_F:
1076                 port->port_speed = EHEA_SPEED_10M;
1077                 port->full_duplex = 1;
1078                 break;
1079         case H_SPEED_100M_H:
1080                 port->port_speed = EHEA_SPEED_100M;
1081                 port->full_duplex = 0;
1082                 break;
1083         case H_SPEED_100M_F:
1084                 port->port_speed = EHEA_SPEED_100M;
1085                 port->full_duplex = 1;
1086                 break;
1087         case H_SPEED_1G_F:
1088                 port->port_speed = EHEA_SPEED_1G;
1089                 port->full_duplex = 1;
1090                 break;
1091         case H_SPEED_10G_F:
1092                 port->port_speed = EHEA_SPEED_10G;
1093                 port->full_duplex = 1;
1094                 break;
1095         default:
1096                 port->port_speed = 0;
1097                 port->full_duplex = 0;
1098                 break;
1099         }
1100
1101         port->autoneg = 1;
1102         port->num_mcs = cb0->num_default_qps;
1103
1104         /* Number of default QPs */
1105         if (use_mcs)
1106                 port->num_def_qps = cb0->num_default_qps;
1107         else
1108                 port->num_def_qps = 1;
1109
1110         if (!port->num_def_qps) {
1111                 ret = -EINVAL;
1112                 goto out_free;
1113         }
1114
1115         port->num_tx_qps = num_tx_qps;
1116
1117         if (port->num_def_qps >= port->num_tx_qps)
1118                 port->num_add_tx_qps = 0;
1119         else
1120                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1121
1122         ret = 0;
1123 out_free:
1124         if (ret || netif_msg_probe(port))
1125                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1126         free_page((unsigned long)cb0);
1127 out:
1128         return ret;
1129 }
1130
1131 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1132 {
1133         struct hcp_ehea_port_cb4 *cb4;
1134         u64 hret;
1135         int ret = 0;
1136
1137         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1138         if (!cb4) {
1139                 pr_err("no mem for cb4\n");
1140                 ret = -ENOMEM;
1141                 goto out;
1142         }
1143
1144         cb4->port_speed = port_speed;
1145
1146         netif_carrier_off(port->netdev);
1147
1148         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1149                                        port->logical_port_id,
1150                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1151         if (hret == H_SUCCESS) {
1152                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1153
1154                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1155                                               port->logical_port_id,
1156                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1157                                               cb4);
1158                 if (hret == H_SUCCESS) {
1159                         switch (cb4->port_speed) {
1160                         case H_SPEED_10M_H:
1161                                 port->port_speed = EHEA_SPEED_10M;
1162                                 port->full_duplex = 0;
1163                                 break;
1164                         case H_SPEED_10M_F:
1165                                 port->port_speed = EHEA_SPEED_10M;
1166                                 port->full_duplex = 1;
1167                                 break;
1168                         case H_SPEED_100M_H:
1169                                 port->port_speed = EHEA_SPEED_100M;
1170                                 port->full_duplex = 0;
1171                                 break;
1172                         case H_SPEED_100M_F:
1173                                 port->port_speed = EHEA_SPEED_100M;
1174                                 port->full_duplex = 1;
1175                                 break;
1176                         case H_SPEED_1G_F:
1177                                 port->port_speed = EHEA_SPEED_1G;
1178                                 port->full_duplex = 1;
1179                                 break;
1180                         case H_SPEED_10G_F:
1181                                 port->port_speed = EHEA_SPEED_10G;
1182                                 port->full_duplex = 1;
1183                                 break;
1184                         default:
1185                                 port->port_speed = 0;
1186                                 port->full_duplex = 0;
1187                                 break;
1188                         }
1189                 } else {
1190                         pr_err("Failed sensing port speed\n");
1191                         ret = -EIO;
1192                 }
1193         } else {
1194                 if (hret == H_AUTHORITY) {
1195                         pr_info("Hypervisor denied setting port speed\n");
1196                         ret = -EPERM;
1197                 } else {
1198                         ret = -EIO;
1199                         pr_err("Failed setting port speed\n");
1200                 }
1201         }
1202         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1203                 netif_carrier_on(port->netdev);
1204
1205         free_page((unsigned long)cb4);
1206 out:
1207         return ret;
1208 }
1209
1210 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1211 {
1212         int ret;
1213         u8 ec;
1214         u8 portnum;
1215         struct ehea_port *port;
1216         struct net_device *dev;
1217
1218         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1219         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1220         port = ehea_get_port(adapter, portnum);
1221         dev = port->netdev;
1222
1223         switch (ec) {
1224         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1225
1226                 if (!port) {
1227                         netdev_err(dev, "unknown portnum %x\n", portnum);
1228                         break;
1229                 }
1230
1231                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1232                         if (!netif_carrier_ok(dev)) {
1233                                 ret = ehea_sense_port_attr(port);
1234                                 if (ret) {
1235                                         netdev_err(dev, "failed resensing port attributes\n");
1236                                         break;
1237                                 }
1238
1239                                 netif_info(port, link, dev,
1240                                            "Logical port up: %dMbps %s Duplex\n",
1241                                            port->port_speed,
1242                                            port->full_duplex == 1 ?
1243                                            "Full" : "Half");
1244
1245                                 netif_carrier_on(dev);
1246                                 netif_wake_queue(dev);
1247                         }
1248                 } else
1249                         if (netif_carrier_ok(dev)) {
1250                                 netif_info(port, link, dev,
1251                                            "Logical port down\n");
1252                                 netif_carrier_off(dev);
1253                                 netif_tx_disable(dev);
1254                         }
1255
1256                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1257                         port->phy_link = EHEA_PHY_LINK_UP;
1258                         netif_info(port, link, dev,
1259                                    "Physical port up\n");
1260                         if (prop_carrier_state)
1261                                 netif_carrier_on(dev);
1262                 } else {
1263                         port->phy_link = EHEA_PHY_LINK_DOWN;
1264                         netif_info(port, link, dev,
1265                                    "Physical port down\n");
1266                         if (prop_carrier_state)
1267                                 netif_carrier_off(dev);
1268                 }
1269
1270                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1271                         netdev_info(dev,
1272                                     "External switch port is primary port\n");
1273                 else
1274                         netdev_info(dev,
1275                                     "External switch port is backup port\n");
1276
1277                 break;
1278         case EHEA_EC_ADAPTER_MALFUNC:
1279                 netdev_err(dev, "Adapter malfunction\n");
1280                 break;
1281         case EHEA_EC_PORT_MALFUNC:
1282                 netdev_info(dev, "Port malfunction\n");
1283                 netif_carrier_off(dev);
1284                 netif_tx_disable(dev);
1285                 break;
1286         default:
1287                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1288                 break;
1289         }
1290 }
1291
1292 static void ehea_neq_tasklet(unsigned long data)
1293 {
1294         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1295         struct ehea_eqe *eqe;
1296         u64 event_mask;
1297
1298         eqe = ehea_poll_eq(adapter->neq);
1299         pr_debug("eqe=%p\n", eqe);
1300
1301         while (eqe) {
1302                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1303                 ehea_parse_eqe(adapter, eqe->entry);
1304                 eqe = ehea_poll_eq(adapter->neq);
1305                 pr_debug("next eqe=%p\n", eqe);
1306         }
1307
1308         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1309                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1310                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1311
1312         ehea_h_reset_events(adapter->handle,
1313                             adapter->neq->fw_handle, event_mask);
1314 }
1315
1316 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1317 {
1318         struct ehea_adapter *adapter = param;
1319         tasklet_hi_schedule(&adapter->neq_tasklet);
1320         return IRQ_HANDLED;
1321 }
1322
1323
1324 static int ehea_fill_port_res(struct ehea_port_res *pr)
1325 {
1326         int ret;
1327         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1328
1329         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1330
1331         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1332
1333         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1334
1335         return ret;
1336 }
1337
1338 static int ehea_reg_interrupts(struct net_device *dev)
1339 {
1340         struct ehea_port *port = netdev_priv(dev);
1341         struct ehea_port_res *pr;
1342         int i, ret;
1343
1344
1345         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1346                  dev->name);
1347
1348         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1349                                   ehea_qp_aff_irq_handler,
1350                                   IRQF_DISABLED, port->int_aff_name, port);
1351         if (ret) {
1352                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1353                            port->qp_eq->attr.ist1);
1354                 goto out_free_qpeq;
1355         }
1356
1357         netif_info(port, ifup, dev,
1358                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1359                    port->qp_eq->attr.ist1);
1360
1361
1362         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1363                 pr = &port->port_res[i];
1364                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1365                          "%s-queue%d", dev->name, i);
1366                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1367                                           ehea_recv_irq_handler,
1368                                           IRQF_DISABLED, pr->int_send_name,
1369                                           pr);
1370                 if (ret) {
1371                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1372                                    i, pr->eq->attr.ist1);
1373                         goto out_free_req;
1374                 }
1375                 netif_info(port, ifup, dev,
1376                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1377                            pr->eq->attr.ist1, i);
1378         }
1379 out:
1380         return ret;
1381
1382
1383 out_free_req:
1384         while (--i >= 0) {
1385                 u32 ist = port->port_res[i].eq->attr.ist1;
1386                 ibmebus_free_irq(ist, &port->port_res[i]);
1387         }
1388
1389 out_free_qpeq:
1390         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1391         i = port->num_def_qps;
1392
1393         goto out;
1394
1395 }
1396
1397 static void ehea_free_interrupts(struct net_device *dev)
1398 {
1399         struct ehea_port *port = netdev_priv(dev);
1400         struct ehea_port_res *pr;
1401         int i;
1402
1403         /* send */
1404
1405         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1406                 pr = &port->port_res[i];
1407                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1408                 netif_info(port, intr, dev,
1409                            "free send irq for res %d with handle 0x%X\n",
1410                            i, pr->eq->attr.ist1);
1411         }
1412
1413         /* associated events */
1414         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1415         netif_info(port, intr, dev,
1416                    "associated event interrupt for handle 0x%X freed\n",
1417                    port->qp_eq->attr.ist1);
1418 }
1419
1420 static int ehea_configure_port(struct ehea_port *port)
1421 {
1422         int ret, i;
1423         u64 hret, mask;
1424         struct hcp_ehea_port_cb0 *cb0;
1425
1426         ret = -ENOMEM;
1427         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1428         if (!cb0)
1429                 goto out;
1430
1431         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1432                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1433                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1434                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1435                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1436                                       PXLY_RC_VLAN_FILTER)
1437                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1438
1439         for (i = 0; i < port->num_mcs; i++)
1440                 if (use_mcs)
1441                         cb0->default_qpn_arr[i] =
1442                                 port->port_res[i].qp->init_attr.qp_nr;
1443                 else
1444                         cb0->default_qpn_arr[i] =
1445                                 port->port_res[0].qp->init_attr.qp_nr;
1446
1447         if (netif_msg_ifup(port))
1448                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1449
1450         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1451              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1452
1453         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1454                                        port->logical_port_id,
1455                                        H_PORT_CB0, mask, cb0);
1456         ret = -EIO;
1457         if (hret != H_SUCCESS)
1458                 goto out_free;
1459
1460         ret = 0;
1461
1462 out_free:
1463         free_page((unsigned long)cb0);
1464 out:
1465         return ret;
1466 }
1467
1468 int ehea_gen_smrs(struct ehea_port_res *pr)
1469 {
1470         int ret;
1471         struct ehea_adapter *adapter = pr->port->adapter;
1472
1473         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1474         if (ret)
1475                 goto out;
1476
1477         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1478         if (ret)
1479                 goto out_free;
1480
1481         return 0;
1482
1483 out_free:
1484         ehea_rem_mr(&pr->send_mr);
1485 out:
1486         pr_err("Generating SMRS failed\n");
1487         return -EIO;
1488 }
1489
1490 int ehea_rem_smrs(struct ehea_port_res *pr)
1491 {
1492         if ((ehea_rem_mr(&pr->send_mr)) ||
1493             (ehea_rem_mr(&pr->recv_mr)))
1494                 return -EIO;
1495         else
1496                 return 0;
1497 }
1498
1499 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1500 {
1501         int arr_size = sizeof(void *) * max_q_entries;
1502
1503         q_skba->arr = vzalloc(arr_size);
1504         if (!q_skba->arr)
1505                 return -ENOMEM;
1506
1507         q_skba->len = max_q_entries;
1508         q_skba->index = 0;
1509         q_skba->os_skbs = 0;
1510
1511         return 0;
1512 }
1513
1514 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1515                               struct port_res_cfg *pr_cfg, int queue_token)
1516 {
1517         struct ehea_adapter *adapter = port->adapter;
1518         enum ehea_eq_type eq_type = EHEA_EQ;
1519         struct ehea_qp_init_attr *init_attr = NULL;
1520         int ret = -EIO;
1521         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1522
1523         tx_bytes = pr->tx_bytes;
1524         tx_packets = pr->tx_packets;
1525         rx_bytes = pr->rx_bytes;
1526         rx_packets = pr->rx_packets;
1527
1528         memset(pr, 0, sizeof(struct ehea_port_res));
1529
1530         pr->tx_bytes = rx_bytes;
1531         pr->tx_packets = tx_packets;
1532         pr->rx_bytes = rx_bytes;
1533         pr->rx_packets = rx_packets;
1534
1535         pr->port = port;
1536
1537         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1538         if (!pr->eq) {
1539                 pr_err("create_eq failed (eq)\n");
1540                 goto out_free;
1541         }
1542
1543         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1544                                      pr->eq->fw_handle,
1545                                      port->logical_port_id);
1546         if (!pr->recv_cq) {
1547                 pr_err("create_cq failed (cq_recv)\n");
1548                 goto out_free;
1549         }
1550
1551         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1552                                      pr->eq->fw_handle,
1553                                      port->logical_port_id);
1554         if (!pr->send_cq) {
1555                 pr_err("create_cq failed (cq_send)\n");
1556                 goto out_free;
1557         }
1558
1559         if (netif_msg_ifup(port))
1560                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1561                         pr->send_cq->attr.act_nr_of_cqes,
1562                         pr->recv_cq->attr.act_nr_of_cqes);
1563
1564         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1565         if (!init_attr) {
1566                 ret = -ENOMEM;
1567                 pr_err("no mem for ehea_qp_init_attr\n");
1568                 goto out_free;
1569         }
1570
1571         init_attr->low_lat_rq1 = 1;
1572         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1573         init_attr->rq_count = 3;
1574         init_attr->qp_token = queue_token;
1575         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1576         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1577         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1578         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1579         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1580         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1581         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1582         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1583         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1584         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1585         init_attr->port_nr = port->logical_port_id;
1586         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1587         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1588         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1589
1590         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1591         if (!pr->qp) {
1592                 pr_err("create_qp failed\n");
1593                 ret = -EIO;
1594                 goto out_free;
1595         }
1596
1597         if (netif_msg_ifup(port))
1598                 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",
1599                         init_attr->qp_nr,
1600                         init_attr->act_nr_send_wqes,
1601                         init_attr->act_nr_rwqes_rq1,
1602                         init_attr->act_nr_rwqes_rq2,
1603                         init_attr->act_nr_rwqes_rq3);
1604
1605         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1606
1607         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1608         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1609         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1610         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1611         if (ret)
1612                 goto out_free;
1613
1614         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1615         if (ehea_gen_smrs(pr) != 0) {
1616                 ret = -EIO;
1617                 goto out_free;
1618         }
1619
1620         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1621
1622         kfree(init_attr);
1623
1624         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1625
1626         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1627         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1628         pr->lro_mgr.lro_arr = pr->lro_desc;
1629         pr->lro_mgr.get_skb_header = get_skb_hdr;
1630         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1631         pr->lro_mgr.dev = port->netdev;
1632         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1633         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1634
1635         ret = 0;
1636         goto out;
1637
1638 out_free:
1639         kfree(init_attr);
1640         vfree(pr->sq_skba.arr);
1641         vfree(pr->rq1_skba.arr);
1642         vfree(pr->rq2_skba.arr);
1643         vfree(pr->rq3_skba.arr);
1644         ehea_destroy_qp(pr->qp);
1645         ehea_destroy_cq(pr->send_cq);
1646         ehea_destroy_cq(pr->recv_cq);
1647         ehea_destroy_eq(pr->eq);
1648 out:
1649         return ret;
1650 }
1651
1652 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1653 {
1654         int ret, i;
1655
1656         if (pr->qp)
1657                 netif_napi_del(&pr->napi);
1658
1659         ret = ehea_destroy_qp(pr->qp);
1660
1661         if (!ret) {
1662                 ehea_destroy_cq(pr->send_cq);
1663                 ehea_destroy_cq(pr->recv_cq);
1664                 ehea_destroy_eq(pr->eq);
1665
1666                 for (i = 0; i < pr->rq1_skba.len; i++)
1667                         if (pr->rq1_skba.arr[i])
1668                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1669
1670                 for (i = 0; i < pr->rq2_skba.len; i++)
1671                         if (pr->rq2_skba.arr[i])
1672                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1673
1674                 for (i = 0; i < pr->rq3_skba.len; i++)
1675                         if (pr->rq3_skba.arr[i])
1676                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1677
1678                 for (i = 0; i < pr->sq_skba.len; i++)
1679                         if (pr->sq_skba.arr[i])
1680                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1681
1682                 vfree(pr->rq1_skba.arr);
1683                 vfree(pr->rq2_skba.arr);
1684                 vfree(pr->rq3_skba.arr);
1685                 vfree(pr->sq_skba.arr);
1686                 ret = ehea_rem_smrs(pr);
1687         }
1688         return ret;
1689 }
1690
1691 /*
1692  * The write_* functions store information in swqe which is used by
1693  * the hardware to calculate the ip/tcp/udp checksum
1694  */
1695
1696 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1697                                       const struct sk_buff *skb)
1698 {
1699         swqe->ip_start = skb_network_offset(skb);
1700         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1701 }
1702
1703 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1704                                         const struct sk_buff *skb)
1705 {
1706         swqe->tcp_offset =
1707                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1708
1709         swqe->tcp_end = (u16)skb->len - 1;
1710 }
1711
1712 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1713                                         const struct sk_buff *skb)
1714 {
1715         swqe->tcp_offset =
1716                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1717
1718         swqe->tcp_end = (u16)skb->len - 1;
1719 }
1720
1721
1722 static void write_swqe2_TSO(struct sk_buff *skb,
1723                             struct ehea_swqe *swqe, u32 lkey)
1724 {
1725         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1726         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1727         int skb_data_size = skb_headlen(skb);
1728         int headersize;
1729
1730         /* Packet is TCP with TSO enabled */
1731         swqe->tx_control |= EHEA_SWQE_TSO;
1732         swqe->mss = skb_shinfo(skb)->gso_size;
1733         /* copy only eth/ip/tcp headers to immediate data and
1734          * the rest of skb->data to sg1entry
1735          */
1736         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1737
1738         skb_data_size = skb_headlen(skb);
1739
1740         if (skb_data_size >= headersize) {
1741                 /* copy immediate data */
1742                 skb_copy_from_linear_data(skb, imm_data, headersize);
1743                 swqe->immediate_data_length = headersize;
1744
1745                 if (skb_data_size > headersize) {
1746                         /* set sg1entry data */
1747                         sg1entry->l_key = lkey;
1748                         sg1entry->len = skb_data_size - headersize;
1749                         sg1entry->vaddr =
1750                                 ehea_map_vaddr(skb->data + headersize);
1751                         swqe->descriptors++;
1752                 }
1753         } else
1754                 pr_err("cannot handle fragmented headers\n");
1755 }
1756
1757 static void write_swqe2_nonTSO(struct sk_buff *skb,
1758                                struct ehea_swqe *swqe, u32 lkey)
1759 {
1760         int skb_data_size = skb_headlen(skb);
1761         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1762         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1763
1764         /* Packet is any nonTSO type
1765          *
1766          * Copy as much as possible skb->data to immediate data and
1767          * the rest to sg1entry
1768          */
1769         if (skb_data_size >= SWQE2_MAX_IMM) {
1770                 /* copy immediate data */
1771                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1772
1773                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1774
1775                 if (skb_data_size > SWQE2_MAX_IMM) {
1776                         /* copy sg1entry data */
1777                         sg1entry->l_key = lkey;
1778                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1779                         sg1entry->vaddr =
1780                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1781                         swqe->descriptors++;
1782                 }
1783         } else {
1784                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1785                 swqe->immediate_data_length = skb_data_size;
1786         }
1787 }
1788
1789 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1790                                     struct ehea_swqe *swqe, u32 lkey)
1791 {
1792         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1793         skb_frag_t *frag;
1794         int nfrags, sg1entry_contains_frag_data, i;
1795
1796         nfrags = skb_shinfo(skb)->nr_frags;
1797         sg1entry = &swqe->u.immdata_desc.sg_entry;
1798         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1799         swqe->descriptors = 0;
1800         sg1entry_contains_frag_data = 0;
1801
1802         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1803                 write_swqe2_TSO(skb, swqe, lkey);
1804         else
1805                 write_swqe2_nonTSO(skb, swqe, lkey);
1806
1807         /* write descriptors */
1808         if (nfrags > 0) {
1809                 if (swqe->descriptors == 0) {
1810                         /* sg1entry not yet used */
1811                         frag = &skb_shinfo(skb)->frags[0];
1812
1813                         /* copy sg1entry data */
1814                         sg1entry->l_key = lkey;
1815                         sg1entry->len = frag->size;
1816                         sg1entry->vaddr =
1817                                 ehea_map_vaddr(skb_frag_address(frag));
1818                         swqe->descriptors++;
1819                         sg1entry_contains_frag_data = 1;
1820                 }
1821
1822                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1823
1824                         frag = &skb_shinfo(skb)->frags[i];
1825                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1826
1827                         sgentry->l_key = lkey;
1828                         sgentry->len = frag->size;
1829                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1830                         swqe->descriptors++;
1831                 }
1832         }
1833 }
1834
1835 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1836 {
1837         int ret = 0;
1838         u64 hret;
1839         u8 reg_type;
1840
1841         /* De/Register untagged packets */
1842         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1843         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1844                                      port->logical_port_id,
1845                                      reg_type, port->mac_addr, 0, hcallid);
1846         if (hret != H_SUCCESS) {
1847                 pr_err("%sregistering bc address failed (tagged)\n",
1848                        hcallid == H_REG_BCMC ? "" : "de");
1849                 ret = -EIO;
1850                 goto out_herr;
1851         }
1852
1853         /* De/Register VLAN packets */
1854         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1855         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1856                                      port->logical_port_id,
1857                                      reg_type, port->mac_addr, 0, hcallid);
1858         if (hret != H_SUCCESS) {
1859                 pr_err("%sregistering bc address failed (vlan)\n",
1860                        hcallid == H_REG_BCMC ? "" : "de");
1861                 ret = -EIO;
1862         }
1863 out_herr:
1864         return ret;
1865 }
1866
1867 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1868 {
1869         struct ehea_port *port = netdev_priv(dev);
1870         struct sockaddr *mac_addr = sa;
1871         struct hcp_ehea_port_cb0 *cb0;
1872         int ret;
1873         u64 hret;
1874
1875         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1876                 ret = -EADDRNOTAVAIL;
1877                 goto out;
1878         }
1879
1880         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1881         if (!cb0) {
1882                 pr_err("no mem for cb0\n");
1883                 ret = -ENOMEM;
1884                 goto out;
1885         }
1886
1887         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1888
1889         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1890
1891         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1892                                        port->logical_port_id, H_PORT_CB0,
1893                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1894         if (hret != H_SUCCESS) {
1895                 ret = -EIO;
1896                 goto out_free;
1897         }
1898
1899         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1900
1901         /* Deregister old MAC in pHYP */
1902         if (port->state == EHEA_PORT_UP) {
1903                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1904                 if (ret)
1905                         goto out_upregs;
1906         }
1907
1908         port->mac_addr = cb0->port_mac_addr << 16;
1909
1910         /* Register new MAC in pHYP */
1911         if (port->state == EHEA_PORT_UP) {
1912                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1913                 if (ret)
1914                         goto out_upregs;
1915         }
1916
1917         ret = 0;
1918
1919 out_upregs:
1920         ehea_update_bcmc_registrations();
1921 out_free:
1922         free_page((unsigned long)cb0);
1923 out:
1924         return ret;
1925 }
1926
1927 static void ehea_promiscuous_error(u64 hret, int enable)
1928 {
1929         if (hret == H_AUTHORITY)
1930                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1931                         enable == 1 ? "en" : "dis");
1932         else
1933                 pr_err("failed %sabling promiscuous mode\n",
1934                        enable == 1 ? "en" : "dis");
1935 }
1936
1937 static void ehea_promiscuous(struct net_device *dev, int enable)
1938 {
1939         struct ehea_port *port = netdev_priv(dev);
1940         struct hcp_ehea_port_cb7 *cb7;
1941         u64 hret;
1942
1943         if (enable == port->promisc)
1944                 return;
1945
1946         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1947         if (!cb7) {
1948                 pr_err("no mem for cb7\n");
1949                 goto out;
1950         }
1951
1952         /* Modify Pxs_DUCQPN in CB7 */
1953         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1954
1955         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1956                                        port->logical_port_id,
1957                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1958         if (hret) {
1959                 ehea_promiscuous_error(hret, enable);
1960                 goto out;
1961         }
1962
1963         port->promisc = enable;
1964 out:
1965         free_page((unsigned long)cb7);
1966 }
1967
1968 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1969                                      u32 hcallid)
1970 {
1971         u64 hret;
1972         u8 reg_type;
1973
1974         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1975                  | EHEA_BCMC_UNTAGGED;
1976
1977         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1978                                      port->logical_port_id,
1979                                      reg_type, mc_mac_addr, 0, hcallid);
1980         if (hret)
1981                 goto out;
1982
1983         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1984                  | EHEA_BCMC_VLANID_ALL;
1985
1986         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1987                                      port->logical_port_id,
1988                                      reg_type, mc_mac_addr, 0, hcallid);
1989 out:
1990         return hret;
1991 }
1992
1993 static int ehea_drop_multicast_list(struct net_device *dev)
1994 {
1995         struct ehea_port *port = netdev_priv(dev);
1996         struct ehea_mc_list *mc_entry = port->mc_list;
1997         struct list_head *pos;
1998         struct list_head *temp;
1999         int ret = 0;
2000         u64 hret;
2001
2002         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2003                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2004
2005                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2006                                                  H_DEREG_BCMC);
2007                 if (hret) {
2008                         pr_err("failed deregistering mcast MAC\n");
2009                         ret = -EIO;
2010                 }
2011
2012                 list_del(pos);
2013                 kfree(mc_entry);
2014         }
2015         return ret;
2016 }
2017
2018 static void ehea_allmulti(struct net_device *dev, int enable)
2019 {
2020         struct ehea_port *port = netdev_priv(dev);
2021         u64 hret;
2022
2023         if (!port->allmulti) {
2024                 if (enable) {
2025                         /* Enable ALLMULTI */
2026                         ehea_drop_multicast_list(dev);
2027                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2028                         if (!hret)
2029                                 port->allmulti = 1;
2030                         else
2031                                 netdev_err(dev,
2032                                            "failed enabling IFF_ALLMULTI\n");
2033                 }
2034         } else
2035                 if (!enable) {
2036                         /* Disable ALLMULTI */
2037                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2038                         if (!hret)
2039                                 port->allmulti = 0;
2040                         else
2041                                 netdev_err(dev,
2042                                            "failed disabling IFF_ALLMULTI\n");
2043                 }
2044 }
2045
2046 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2047 {
2048         struct ehea_mc_list *ehea_mcl_entry;
2049         u64 hret;
2050
2051         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2052         if (!ehea_mcl_entry) {
2053                 pr_err("no mem for mcl_entry\n");
2054                 return;
2055         }
2056
2057         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2058
2059         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2060
2061         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2062                                          H_REG_BCMC);
2063         if (!hret)
2064                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2065         else {
2066                 pr_err("failed registering mcast MAC\n");
2067                 kfree(ehea_mcl_entry);
2068         }
2069 }
2070
2071 static void ehea_set_multicast_list(struct net_device *dev)
2072 {
2073         struct ehea_port *port = netdev_priv(dev);
2074         struct netdev_hw_addr *ha;
2075         int ret;
2076
2077         if (port->promisc) {
2078                 ehea_promiscuous(dev, 1);
2079                 return;
2080         }
2081         ehea_promiscuous(dev, 0);
2082
2083         if (dev->flags & IFF_ALLMULTI) {
2084                 ehea_allmulti(dev, 1);
2085                 goto out;
2086         }
2087         ehea_allmulti(dev, 0);
2088
2089         if (!netdev_mc_empty(dev)) {
2090                 ret = ehea_drop_multicast_list(dev);
2091                 if (ret) {
2092                         /* Dropping the current multicast list failed.
2093                          * Enabling ALL_MULTI is the best we can do.
2094                          */
2095                         ehea_allmulti(dev, 1);
2096                 }
2097
2098                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2099                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2100                                 port->adapter->max_mc_mac);
2101                         goto out;
2102                 }
2103
2104                 netdev_for_each_mc_addr(ha, dev)
2105                         ehea_add_multicast_entry(port, ha->addr);
2106
2107         }
2108 out:
2109         ehea_update_bcmc_registrations();
2110 }
2111
2112 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2113 {
2114         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2115                 return -EINVAL;
2116         dev->mtu = new_mtu;
2117         return 0;
2118 }
2119
2120 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2121                        struct ehea_swqe *swqe, u32 lkey)
2122 {
2123         if (skb->protocol == htons(ETH_P_IP)) {
2124                 const struct iphdr *iph = ip_hdr(skb);
2125
2126                 /* IPv4 */
2127                 swqe->tx_control |= EHEA_SWQE_CRC
2128                                  | EHEA_SWQE_IP_CHECKSUM
2129                                  | EHEA_SWQE_TCP_CHECKSUM
2130                                  | EHEA_SWQE_IMM_DATA_PRESENT
2131                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2132
2133                 write_ip_start_end(swqe, skb);
2134
2135                 if (iph->protocol == IPPROTO_UDP) {
2136                         if ((iph->frag_off & IP_MF) ||
2137                             (iph->frag_off & IP_OFFSET))
2138                                 /* IP fragment, so don't change cs */
2139                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2140                         else
2141                                 write_udp_offset_end(swqe, skb);
2142                 } else if (iph->protocol == IPPROTO_TCP) {
2143                         write_tcp_offset_end(swqe, skb);
2144                 }
2145
2146                 /* icmp (big data) and ip segmentation packets (all other ip
2147                    packets) do not require any special handling */
2148
2149         } else {
2150                 /* Other Ethernet Protocol */
2151                 swqe->tx_control |= EHEA_SWQE_CRC
2152                                  | EHEA_SWQE_IMM_DATA_PRESENT
2153                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2154         }
2155
2156         write_swqe2_data(skb, dev, swqe, lkey);
2157 }
2158
2159 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2160                        struct ehea_swqe *swqe)
2161 {
2162         int nfrags = skb_shinfo(skb)->nr_frags;
2163         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2164         skb_frag_t *frag;
2165         int i;
2166
2167         if (skb->protocol == htons(ETH_P_IP)) {
2168                 const struct iphdr *iph = ip_hdr(skb);
2169
2170                 /* IPv4 */
2171                 write_ip_start_end(swqe, skb);
2172
2173                 if (iph->protocol == IPPROTO_TCP) {
2174                         swqe->tx_control |= EHEA_SWQE_CRC
2175                                          | EHEA_SWQE_IP_CHECKSUM
2176                                          | EHEA_SWQE_TCP_CHECKSUM
2177                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2178
2179                         write_tcp_offset_end(swqe, skb);
2180
2181                 } else if (iph->protocol == IPPROTO_UDP) {
2182                         if ((iph->frag_off & IP_MF) ||
2183                             (iph->frag_off & IP_OFFSET))
2184                                 /* IP fragment, so don't change cs */
2185                                 swqe->tx_control |= EHEA_SWQE_CRC
2186                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2187                         else {
2188                                 swqe->tx_control |= EHEA_SWQE_CRC
2189                                                  | EHEA_SWQE_IP_CHECKSUM
2190                                                  | EHEA_SWQE_TCP_CHECKSUM
2191                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2192
2193                                 write_udp_offset_end(swqe, skb);
2194                         }
2195                 } else {
2196                         /* icmp (big data) and
2197                            ip segmentation packets (all other ip packets) */
2198                         swqe->tx_control |= EHEA_SWQE_CRC
2199                                          | EHEA_SWQE_IP_CHECKSUM
2200                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2201                 }
2202         } else {
2203                 /* Other Ethernet Protocol */
2204                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2205         }
2206         /* copy (immediate) data */
2207         if (nfrags == 0) {
2208                 /* data is in a single piece */
2209                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2210         } else {
2211                 /* first copy data from the skb->data buffer ... */
2212                 skb_copy_from_linear_data(skb, imm_data,
2213                                           skb_headlen(skb));
2214                 imm_data += skb_headlen(skb);
2215
2216                 /* ... then copy data from the fragments */
2217                 for (i = 0; i < nfrags; i++) {
2218                         frag = &skb_shinfo(skb)->frags[i];
2219                         memcpy(imm_data, skb_frag_address(frag), frag->size);
2220                         imm_data += frag->size;
2221                 }
2222         }
2223         swqe->immediate_data_length = skb->len;
2224         dev_kfree_skb(skb);
2225 }
2226
2227 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2228 {
2229         struct ehea_port *port = netdev_priv(dev);
2230         struct ehea_swqe *swqe;
2231         u32 lkey;
2232         int swqe_index;
2233         struct ehea_port_res *pr;
2234         struct netdev_queue *txq;
2235
2236         pr = &port->port_res[skb_get_queue_mapping(skb)];
2237         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2238
2239         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2240         memset(swqe, 0, SWQE_HEADER_SIZE);
2241         atomic_dec(&pr->swqe_avail);
2242
2243         if (vlan_tx_tag_present(skb)) {
2244                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2245                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2246         }
2247
2248         pr->tx_packets++;
2249         pr->tx_bytes += skb->len;
2250
2251         if (skb->len <= SWQE3_MAX_IMM) {
2252                 u32 sig_iv = port->sig_comp_iv;
2253                 u32 swqe_num = pr->swqe_id_counter;
2254                 ehea_xmit3(skb, dev, swqe);
2255                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2256                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2257                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2258                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2259                                                       sig_iv);
2260                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2261                         pr->swqe_ll_count = 0;
2262                 } else
2263                         pr->swqe_ll_count += 1;
2264         } else {
2265                 swqe->wr_id =
2266                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2267                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2268                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2269                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2270                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2271
2272                 pr->sq_skba.index++;
2273                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2274
2275                 lkey = pr->send_mr.lkey;
2276                 ehea_xmit2(skb, dev, swqe, lkey);
2277                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2278         }
2279         pr->swqe_id_counter += 1;
2280
2281         netif_info(port, tx_queued, dev,
2282                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2283         if (netif_msg_tx_queued(port))
2284                 ehea_dump(swqe, 512, "swqe");
2285
2286         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2287                 netif_tx_stop_queue(txq);
2288                 swqe->tx_control |= EHEA_SWQE_PURGE;
2289         }
2290
2291         ehea_post_swqe(pr->qp, swqe);
2292
2293         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2294                 pr->p_stats.queue_stopped++;
2295                 netif_tx_stop_queue(txq);
2296         }
2297
2298         return NETDEV_TX_OK;
2299 }
2300
2301 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2302 {
2303         struct ehea_port *port = netdev_priv(dev);
2304         struct ehea_adapter *adapter = port->adapter;
2305         struct hcp_ehea_port_cb1 *cb1;
2306         int index;
2307         u64 hret;
2308
2309         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2310         if (!cb1) {
2311                 pr_err("no mem for cb1\n");
2312                 goto out;
2313         }
2314
2315         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2316                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2317         if (hret != H_SUCCESS) {
2318                 pr_err("query_ehea_port failed\n");
2319                 goto out;
2320         }
2321
2322         index = (vid / 64);
2323         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2324
2325         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2326                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2327         if (hret != H_SUCCESS)
2328                 pr_err("modify_ehea_port failed\n");
2329 out:
2330         free_page((unsigned long)cb1);
2331         return;
2332 }
2333
2334 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2335 {
2336         struct ehea_port *port = netdev_priv(dev);
2337         struct ehea_adapter *adapter = port->adapter;
2338         struct hcp_ehea_port_cb1 *cb1;
2339         int index;
2340         u64 hret;
2341
2342         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2343         if (!cb1) {
2344                 pr_err("no mem for cb1\n");
2345                 goto out;
2346         }
2347
2348         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2349                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2350         if (hret != H_SUCCESS) {
2351                 pr_err("query_ehea_port failed\n");
2352                 goto out;
2353         }
2354
2355         index = (vid / 64);
2356         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2357
2358         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2359                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2360         if (hret != H_SUCCESS)
2361                 pr_err("modify_ehea_port failed\n");
2362 out:
2363         free_page((unsigned long)cb1);
2364 }
2365
2366 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2367 {
2368         int ret = -EIO;
2369         u64 hret;
2370         u16 dummy16 = 0;
2371         u64 dummy64 = 0;
2372         struct hcp_modify_qp_cb0 *cb0;
2373
2374         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2375         if (!cb0) {
2376                 ret = -ENOMEM;
2377                 goto out;
2378         }
2379
2380         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2381                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2382         if (hret != H_SUCCESS) {
2383                 pr_err("query_ehea_qp failed (1)\n");
2384                 goto out;
2385         }
2386
2387         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2388         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2389                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2390                                      &dummy64, &dummy64, &dummy16, &dummy16);
2391         if (hret != H_SUCCESS) {
2392                 pr_err("modify_ehea_qp failed (1)\n");
2393                 goto out;
2394         }
2395
2396         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2397                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2398         if (hret != H_SUCCESS) {
2399                 pr_err("query_ehea_qp failed (2)\n");
2400                 goto out;
2401         }
2402
2403         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2404         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2405                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2406                                      &dummy64, &dummy64, &dummy16, &dummy16);
2407         if (hret != H_SUCCESS) {
2408                 pr_err("modify_ehea_qp failed (2)\n");
2409                 goto out;
2410         }
2411
2412         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2413                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2414         if (hret != H_SUCCESS) {
2415                 pr_err("query_ehea_qp failed (3)\n");
2416                 goto out;
2417         }
2418
2419         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2420         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2421                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2422                                      &dummy64, &dummy64, &dummy16, &dummy16);
2423         if (hret != H_SUCCESS) {
2424                 pr_err("modify_ehea_qp failed (3)\n");
2425                 goto out;
2426         }
2427
2428         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2429                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2430         if (hret != H_SUCCESS) {
2431                 pr_err("query_ehea_qp failed (4)\n");
2432                 goto out;
2433         }
2434
2435         ret = 0;
2436 out:
2437         free_page((unsigned long)cb0);
2438         return ret;
2439 }
2440
2441 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2442                                int add_tx_qps)
2443 {
2444         int ret, i;
2445         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2446         enum ehea_eq_type eq_type = EHEA_EQ;
2447
2448         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2449                                    EHEA_MAX_ENTRIES_EQ, 1);
2450         if (!port->qp_eq) {
2451                 ret = -EINVAL;
2452                 pr_err("ehea_create_eq failed (qp_eq)\n");
2453                 goto out_kill_eq;
2454         }
2455
2456         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2457         pr_cfg.max_entries_scq = sq_entries * 2;
2458         pr_cfg.max_entries_sq = sq_entries;
2459         pr_cfg.max_entries_rq1 = rq1_entries;
2460         pr_cfg.max_entries_rq2 = rq2_entries;
2461         pr_cfg.max_entries_rq3 = rq3_entries;
2462
2463         pr_cfg_small_rx.max_entries_rcq = 1;
2464         pr_cfg_small_rx.max_entries_scq = sq_entries;
2465         pr_cfg_small_rx.max_entries_sq = sq_entries;
2466         pr_cfg_small_rx.max_entries_rq1 = 1;
2467         pr_cfg_small_rx.max_entries_rq2 = 1;
2468         pr_cfg_small_rx.max_entries_rq3 = 1;
2469
2470         for (i = 0; i < def_qps; i++) {
2471                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2472                 if (ret)
2473                         goto out_clean_pr;
2474         }
2475         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2476                 ret = ehea_init_port_res(port, &port->port_res[i],
2477                                          &pr_cfg_small_rx, i);
2478                 if (ret)
2479                         goto out_clean_pr;
2480         }
2481
2482         return 0;
2483
2484 out_clean_pr:
2485         while (--i >= 0)
2486                 ehea_clean_portres(port, &port->port_res[i]);
2487
2488 out_kill_eq:
2489         ehea_destroy_eq(port->qp_eq);
2490         return ret;
2491 }
2492
2493 static int ehea_clean_all_portres(struct ehea_port *port)
2494 {
2495         int ret = 0;
2496         int i;
2497
2498         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2499                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2500
2501         ret |= ehea_destroy_eq(port->qp_eq);
2502
2503         return ret;
2504 }
2505
2506 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2507 {
2508         if (adapter->active_ports)
2509                 return;
2510
2511         ehea_rem_mr(&adapter->mr);
2512 }
2513
2514 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2515 {
2516         if (adapter->active_ports)
2517                 return 0;
2518
2519         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2520 }
2521
2522 static int ehea_up(struct net_device *dev)
2523 {
2524         int ret, i;
2525         struct ehea_port *port = netdev_priv(dev);
2526
2527         if (port->state == EHEA_PORT_UP)
2528                 return 0;
2529
2530         ret = ehea_port_res_setup(port, port->num_def_qps,
2531                                   port->num_add_tx_qps);
2532         if (ret) {
2533                 netdev_err(dev, "port_res_failed\n");
2534                 goto out;
2535         }
2536
2537         /* Set default QP for this port */
2538         ret = ehea_configure_port(port);
2539         if (ret) {
2540                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2541                 goto out_clean_pr;
2542         }
2543
2544         ret = ehea_reg_interrupts(dev);
2545         if (ret) {
2546                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2547                 goto out_clean_pr;
2548         }
2549
2550         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2551                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2552                 if (ret) {
2553                         netdev_err(dev, "activate_qp failed\n");
2554                         goto out_free_irqs;
2555                 }
2556         }
2557
2558         for (i = 0; i < port->num_def_qps; i++) {
2559                 ret = ehea_fill_port_res(&port->port_res[i]);
2560                 if (ret) {
2561                         netdev_err(dev, "out_free_irqs\n");
2562                         goto out_free_irqs;
2563                 }
2564         }
2565
2566         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2567         if (ret) {
2568                 ret = -EIO;
2569                 goto out_free_irqs;
2570         }
2571
2572         port->state = EHEA_PORT_UP;
2573
2574         ret = 0;
2575         goto out;
2576
2577 out_free_irqs:
2578         ehea_free_interrupts(dev);
2579
2580 out_clean_pr:
2581         ehea_clean_all_portres(port);
2582 out:
2583         if (ret)
2584                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2585
2586         ehea_update_bcmc_registrations();
2587         ehea_update_firmware_handles();
2588
2589         return ret;
2590 }
2591
2592 static void port_napi_disable(struct ehea_port *port)
2593 {
2594         int i;
2595
2596         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2597                 napi_disable(&port->port_res[i].napi);
2598 }
2599
2600 static void port_napi_enable(struct ehea_port *port)
2601 {
2602         int i;
2603
2604         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2605                 napi_enable(&port->port_res[i].napi);
2606 }
2607
2608 static int ehea_open(struct net_device *dev)
2609 {
2610         int ret;
2611         struct ehea_port *port = netdev_priv(dev);
2612
2613         mutex_lock(&port->port_lock);
2614
2615         netif_info(port, ifup, dev, "enabling port\n");
2616
2617         ret = ehea_up(dev);
2618         if (!ret) {
2619                 port_napi_enable(port);
2620                 netif_tx_start_all_queues(dev);
2621         }
2622
2623         mutex_unlock(&port->port_lock);
2624         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2625
2626         return ret;
2627 }
2628
2629 static int ehea_down(struct net_device *dev)
2630 {
2631         int ret;
2632         struct ehea_port *port = netdev_priv(dev);
2633
2634         if (port->state == EHEA_PORT_DOWN)
2635                 return 0;
2636
2637         ehea_drop_multicast_list(dev);
2638         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2639
2640         ehea_free_interrupts(dev);
2641
2642         port->state = EHEA_PORT_DOWN;
2643
2644         ehea_update_bcmc_registrations();
2645
2646         ret = ehea_clean_all_portres(port);
2647         if (ret)
2648                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2649
2650         ehea_update_firmware_handles();
2651
2652         return ret;
2653 }
2654
2655 static int ehea_stop(struct net_device *dev)
2656 {
2657         int ret;
2658         struct ehea_port *port = netdev_priv(dev);
2659
2660         netif_info(port, ifdown, dev, "disabling port\n");
2661
2662         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2663         cancel_work_sync(&port->reset_task);
2664         cancel_delayed_work_sync(&port->stats_work);
2665         mutex_lock(&port->port_lock);
2666         netif_tx_stop_all_queues(dev);
2667         port_napi_disable(port);
2668         ret = ehea_down(dev);
2669         mutex_unlock(&port->port_lock);
2670         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2671         return ret;
2672 }
2673
2674 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2675 {
2676         struct ehea_qp qp = *orig_qp;
2677         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2678         struct ehea_swqe *swqe;
2679         int wqe_index;
2680         int i;
2681
2682         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2683                 swqe = ehea_get_swqe(&qp, &wqe_index);
2684                 swqe->tx_control |= EHEA_SWQE_PURGE;
2685         }
2686 }
2687
2688 static void ehea_flush_sq(struct ehea_port *port)
2689 {
2690         int i;
2691
2692         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2693                 struct ehea_port_res *pr = &port->port_res[i];
2694                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2695                 int ret;
2696
2697                 ret = wait_event_timeout(port->swqe_avail_wq,
2698                          atomic_read(&pr->swqe_avail) >= swqe_max,
2699                          msecs_to_jiffies(100));
2700
2701                 if (!ret) {
2702                         pr_err("WARNING: sq not flushed completely\n");
2703                         break;
2704                 }
2705         }
2706 }
2707
2708 int ehea_stop_qps(struct net_device *dev)
2709 {
2710         struct ehea_port *port = netdev_priv(dev);
2711         struct ehea_adapter *adapter = port->adapter;
2712         struct hcp_modify_qp_cb0 *cb0;
2713         int ret = -EIO;
2714         int dret;
2715         int i;
2716         u64 hret;
2717         u64 dummy64 = 0;
2718         u16 dummy16 = 0;
2719
2720         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2721         if (!cb0) {
2722                 ret = -ENOMEM;
2723                 goto out;
2724         }
2725
2726         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2727                 struct ehea_port_res *pr =  &port->port_res[i];
2728                 struct ehea_qp *qp = pr->qp;
2729
2730                 /* Purge send queue */
2731                 ehea_purge_sq(qp);
2732
2733                 /* Disable queue pair */
2734                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2735                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2736                                             cb0);
2737                 if (hret != H_SUCCESS) {
2738                         pr_err("query_ehea_qp failed (1)\n");
2739                         goto out;
2740                 }
2741
2742                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2743                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2744
2745                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2746                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2747                                                             1), cb0, &dummy64,
2748                                              &dummy64, &dummy16, &dummy16);
2749                 if (hret != H_SUCCESS) {
2750                         pr_err("modify_ehea_qp failed (1)\n");
2751                         goto out;
2752                 }
2753
2754                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2755                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2756                                             cb0);
2757                 if (hret != H_SUCCESS) {
2758                         pr_err("query_ehea_qp failed (2)\n");
2759                         goto out;
2760                 }
2761
2762                 /* deregister shared memory regions */
2763                 dret = ehea_rem_smrs(pr);
2764                 if (dret) {
2765                         pr_err("unreg shared memory region failed\n");
2766                         goto out;
2767                 }
2768         }
2769
2770         ret = 0;
2771 out:
2772         free_page((unsigned long)cb0);
2773
2774         return ret;
2775 }
2776
2777 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2778 {
2779         struct ehea_qp qp = *orig_qp;
2780         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2781         struct ehea_rwqe *rwqe;
2782         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2783         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2784         struct sk_buff *skb;
2785         u32 lkey = pr->recv_mr.lkey;
2786
2787
2788         int i;
2789         int index;
2790
2791         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2792                 rwqe = ehea_get_next_rwqe(&qp, 2);
2793                 rwqe->sg_list[0].l_key = lkey;
2794                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2795                 skb = skba_rq2[index];
2796                 if (skb)
2797                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2798         }
2799
2800         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2801                 rwqe = ehea_get_next_rwqe(&qp, 3);
2802                 rwqe->sg_list[0].l_key = lkey;
2803                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2804                 skb = skba_rq3[index];
2805                 if (skb)
2806                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2807         }
2808 }
2809
2810 int ehea_restart_qps(struct net_device *dev)
2811 {
2812         struct ehea_port *port = netdev_priv(dev);
2813         struct ehea_adapter *adapter = port->adapter;
2814         int ret = 0;
2815         int i;
2816
2817         struct hcp_modify_qp_cb0 *cb0;
2818         u64 hret;
2819         u64 dummy64 = 0;
2820         u16 dummy16 = 0;
2821
2822         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2823         if (!cb0) {
2824                 ret = -ENOMEM;
2825                 goto out;
2826         }
2827
2828         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2829                 struct ehea_port_res *pr =  &port->port_res[i];
2830                 struct ehea_qp *qp = pr->qp;
2831
2832                 ret = ehea_gen_smrs(pr);
2833                 if (ret) {
2834                         netdev_err(dev, "creation of shared memory regions failed\n");
2835                         goto out;
2836                 }
2837
2838                 ehea_update_rqs(qp, pr);
2839
2840                 /* Enable queue pair */
2841                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2842                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2843                                             cb0);
2844                 if (hret != H_SUCCESS) {
2845                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2846                         goto out;
2847                 }
2848
2849                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2850                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2851
2852                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2853                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2854                                                             1), cb0, &dummy64,
2855                                              &dummy64, &dummy16, &dummy16);
2856                 if (hret != H_SUCCESS) {
2857                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2858                         goto out;
2859                 }
2860
2861                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2862                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2863                                             cb0);
2864                 if (hret != H_SUCCESS) {
2865                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2866                         goto out;
2867                 }
2868
2869                 /* refill entire queue */
2870                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2871                 ehea_refill_rq2(pr, 0);
2872                 ehea_refill_rq3(pr, 0);
2873         }
2874 out:
2875         free_page((unsigned long)cb0);
2876
2877         return ret;
2878 }
2879
2880 static void ehea_reset_port(struct work_struct *work)
2881 {
2882         int ret;
2883         struct ehea_port *port =
2884                 container_of(work, struct ehea_port, reset_task);
2885         struct net_device *dev = port->netdev;
2886
2887         mutex_lock(&dlpar_mem_lock);
2888         port->resets++;
2889         mutex_lock(&port->port_lock);
2890         netif_tx_disable(dev);
2891
2892         port_napi_disable(port);
2893
2894         ehea_down(dev);
2895
2896         ret = ehea_up(dev);
2897         if (ret)
2898                 goto out;
2899
2900         ehea_set_multicast_list(dev);
2901
2902         netif_info(port, timer, dev, "reset successful\n");
2903
2904         port_napi_enable(port);
2905
2906         netif_tx_wake_all_queues(dev);
2907 out:
2908         mutex_unlock(&port->port_lock);
2909         mutex_unlock(&dlpar_mem_lock);
2910 }
2911
2912 static void ehea_rereg_mrs(void)
2913 {
2914         int ret, i;
2915         struct ehea_adapter *adapter;
2916
2917         pr_info("LPAR memory changed - re-initializing driver\n");
2918
2919         list_for_each_entry(adapter, &adapter_list, list)
2920                 if (adapter->active_ports) {
2921                         /* Shutdown all ports */
2922                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2923                                 struct ehea_port *port = adapter->port[i];
2924                                 struct net_device *dev;
2925
2926                                 if (!port)
2927                                         continue;
2928
2929                                 dev = port->netdev;
2930
2931                                 if (dev->flags & IFF_UP) {
2932                                         mutex_lock(&port->port_lock);
2933                                         netif_tx_disable(dev);
2934                                         ehea_flush_sq(port);
2935                                         ret = ehea_stop_qps(dev);
2936                                         if (ret) {
2937                                                 mutex_unlock(&port->port_lock);
2938                                                 goto out;
2939                                         }
2940                                         port_napi_disable(port);
2941                                         mutex_unlock(&port->port_lock);
2942                                 }
2943                                 reset_sq_restart_flag(port);
2944                         }
2945
2946                         /* Unregister old memory region */
2947                         ret = ehea_rem_mr(&adapter->mr);
2948                         if (ret) {
2949                                 pr_err("unregister MR failed - driver inoperable!\n");
2950                                 goto out;
2951                         }
2952                 }
2953
2954         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2955
2956         list_for_each_entry(adapter, &adapter_list, list)
2957                 if (adapter->active_ports) {
2958                         /* Register new memory region */
2959                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2960                         if (ret) {
2961                                 pr_err("register MR failed - driver inoperable!\n");
2962                                 goto out;
2963                         }
2964
2965                         /* Restart all ports */
2966                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2967                                 struct ehea_port *port = adapter->port[i];
2968
2969                                 if (port) {
2970                                         struct net_device *dev = port->netdev;
2971
2972                                         if (dev->flags & IFF_UP) {
2973                                                 mutex_lock(&port->port_lock);
2974                                                 ret = ehea_restart_qps(dev);
2975                                                 if (!ret) {
2976                                                         check_sqs(port);
2977                                                         port_napi_enable(port);
2978                                                         netif_tx_wake_all_queues(dev);
2979                                                 } else {
2980                                                         netdev_err(dev, "Unable to restart QPS\n");
2981                                                 }
2982                                                 mutex_unlock(&port->port_lock);
2983                                         }
2984                                 }
2985                         }
2986                 }
2987         pr_info("re-initializing driver complete\n");
2988 out:
2989         return;
2990 }
2991
2992 static void ehea_tx_watchdog(struct net_device *dev)
2993 {
2994         struct ehea_port *port = netdev_priv(dev);
2995
2996         if (netif_carrier_ok(dev) &&
2997             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2998                 ehea_schedule_port_reset(port);
2999 }
3000
3001 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3002 {
3003         struct hcp_query_ehea *cb;
3004         u64 hret;
3005         int ret;
3006
3007         cb = (void *)get_zeroed_page(GFP_KERNEL);
3008         if (!cb) {
3009                 ret = -ENOMEM;
3010                 goto out;
3011         }
3012
3013         hret = ehea_h_query_ehea(adapter->handle, cb);
3014
3015         if (hret != H_SUCCESS) {
3016                 ret = -EIO;
3017                 goto out_herr;
3018         }
3019
3020         adapter->max_mc_mac = cb->max_mc_mac - 1;
3021         ret = 0;
3022
3023 out_herr:
3024         free_page((unsigned long)cb);
3025 out:
3026         return ret;
3027 }
3028
3029 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3030 {
3031         struct hcp_ehea_port_cb4 *cb4;
3032         u64 hret;
3033         int ret = 0;
3034
3035         *jumbo = 0;
3036
3037         /* (Try to) enable *jumbo frames */
3038         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3039         if (!cb4) {
3040                 pr_err("no mem for cb4\n");
3041                 ret = -ENOMEM;
3042                 goto out;
3043         } else {
3044                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3045                                               port->logical_port_id,
3046                                               H_PORT_CB4,
3047                                               H_PORT_CB4_JUMBO, cb4);
3048                 if (hret == H_SUCCESS) {
3049                         if (cb4->jumbo_frame)
3050                                 *jumbo = 1;
3051                         else {
3052                                 cb4->jumbo_frame = 1;
3053                                 hret = ehea_h_modify_ehea_port(port->adapter->
3054                                                                handle,
3055                                                                port->
3056                                                                logical_port_id,
3057                                                                H_PORT_CB4,
3058                                                                H_PORT_CB4_JUMBO,
3059                                                                cb4);
3060                                 if (hret == H_SUCCESS)
3061                                         *jumbo = 1;
3062                         }
3063                 } else
3064                         ret = -EINVAL;
3065
3066                 free_page((unsigned long)cb4);
3067         }
3068 out:
3069         return ret;
3070 }
3071
3072 static ssize_t ehea_show_port_id(struct device *dev,
3073                                  struct device_attribute *attr, char *buf)
3074 {
3075         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3076         return sprintf(buf, "%d", port->logical_port_id);
3077 }
3078
3079 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3080                    NULL);
3081
3082 static void __devinit logical_port_release(struct device *dev)
3083 {
3084         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3085         of_node_put(port->ofdev.dev.of_node);
3086 }
3087
3088 static struct device *ehea_register_port(struct ehea_port *port,
3089                                          struct device_node *dn)
3090 {
3091         int ret;
3092
3093         port->ofdev.dev.of_node = of_node_get(dn);
3094         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3095         port->ofdev.dev.bus = &ibmebus_bus_type;
3096
3097         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3098         port->ofdev.dev.release = logical_port_release;
3099
3100         ret = of_device_register(&port->ofdev);
3101         if (ret) {
3102                 pr_err("failed to register device. ret=%d\n", ret);
3103                 goto out;
3104         }
3105
3106         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3107         if (ret) {
3108                 pr_err("failed to register attributes, ret=%d\n", ret);
3109                 goto out_unreg_of_dev;
3110         }
3111
3112         return &port->ofdev.dev;
3113
3114 out_unreg_of_dev:
3115         of_device_unregister(&port->ofdev);
3116 out:
3117         return NULL;
3118 }
3119
3120 static void ehea_unregister_port(struct ehea_port *port)
3121 {
3122         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3123         of_device_unregister(&port->ofdev);
3124 }
3125
3126 static const struct net_device_ops ehea_netdev_ops = {
3127         .ndo_open               = ehea_open,
3128         .ndo_stop               = ehea_stop,
3129         .ndo_start_xmit         = ehea_start_xmit,
3130 #ifdef CONFIG_NET_POLL_CONTROLLER
3131         .ndo_poll_controller    = ehea_netpoll,
3132 #endif
3133         .ndo_get_stats          = ehea_get_stats,
3134         .ndo_set_mac_address    = ehea_set_mac_addr,
3135         .ndo_validate_addr      = eth_validate_addr,
3136         .ndo_set_rx_mode        = ehea_set_multicast_list,
3137         .ndo_change_mtu         = ehea_change_mtu,
3138         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3139         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3140         .ndo_tx_timeout         = ehea_tx_watchdog,
3141 };
3142
3143 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3144                                          u32 logical_port_id,
3145                                          struct device_node *dn)
3146 {
3147         int ret;
3148         struct net_device *dev;
3149         struct ehea_port *port;
3150         struct device *port_dev;
3151         int jumbo;
3152
3153         /* allocate memory for the port structures */
3154         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
3155
3156         if (!dev) {
3157                 pr_err("no mem for net_device\n");
3158                 ret = -ENOMEM;
3159                 goto out_err;
3160         }
3161
3162         port = netdev_priv(dev);
3163
3164         mutex_init(&port->port_lock);
3165         port->state = EHEA_PORT_DOWN;
3166         port->sig_comp_iv = sq_entries / 10;
3167
3168         port->adapter = adapter;
3169         port->netdev = dev;
3170         port->logical_port_id = logical_port_id;
3171
3172         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3173
3174         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3175         if (!port->mc_list) {
3176                 ret = -ENOMEM;
3177                 goto out_free_ethdev;
3178         }
3179
3180         INIT_LIST_HEAD(&port->mc_list->list);
3181
3182         ret = ehea_sense_port_attr(port);
3183         if (ret)
3184                 goto out_free_mc_list;
3185
3186         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3187         netif_set_real_num_tx_queues(dev, port->num_def_qps +
3188                                      port->num_add_tx_qps);
3189
3190         port_dev = ehea_register_port(port, dn);
3191         if (!port_dev)
3192                 goto out_free_mc_list;
3193
3194         SET_NETDEV_DEV(dev, port_dev);
3195
3196         /* initialize net_device structure */
3197         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3198
3199         dev->netdev_ops = &ehea_netdev_ops;
3200         ehea_set_ethtool_ops(dev);
3201
3202         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3203                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3204         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3205                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3206                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3207                       | NETIF_F_RXCSUM;
3208         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3209
3210         if (use_lro)
3211                 dev->features |= NETIF_F_LRO;
3212
3213         INIT_WORK(&port->reset_task, ehea_reset_port);
3214         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3215
3216         init_waitqueue_head(&port->swqe_avail_wq);
3217         init_waitqueue_head(&port->restart_wq);
3218
3219         memset(&port->stats, 0, sizeof(struct net_device_stats));
3220         ret = register_netdev(dev);
3221         if (ret) {
3222                 pr_err("register_netdev failed. ret=%d\n", ret);
3223                 goto out_unreg_port;
3224         }
3225
3226         port->lro_max_aggr = lro_max_aggr;
3227
3228         ret = ehea_get_jumboframe_status(port, &jumbo);
3229         if (ret)
3230                 netdev_err(dev, "failed determining jumbo frame status\n");
3231
3232         netdev_info(dev, "Jumbo frames are %sabled\n",
3233                     jumbo == 1 ? "en" : "dis");
3234
3235         adapter->active_ports++;
3236
3237         return port;
3238
3239 out_unreg_port:
3240         ehea_unregister_port(port);
3241
3242 out_free_mc_list:
3243         kfree(port->mc_list);
3244
3245 out_free_ethdev:
3246         free_netdev(dev);
3247
3248 out_err:
3249         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3250                logical_port_id, ret);
3251         return NULL;
3252 }
3253
3254 static void ehea_shutdown_single_port(struct ehea_port *port)
3255 {
3256         struct ehea_adapter *adapter = port->adapter;
3257
3258         cancel_work_sync(&port->reset_task);
3259         cancel_delayed_work_sync(&port->stats_work);
3260         unregister_netdev(port->netdev);
3261         ehea_unregister_port(port);
3262         kfree(port->mc_list);
3263         free_netdev(port->netdev);
3264         adapter->active_ports--;
3265 }
3266
3267 static int ehea_setup_ports(struct ehea_adapter *adapter)
3268 {
3269         struct device_node *lhea_dn;
3270         struct device_node *eth_dn = NULL;
3271
3272         const u32 *dn_log_port_id;
3273         int i = 0;
3274
3275         lhea_dn = adapter->ofdev->dev.of_node;
3276         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3277
3278                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3279                                                  NULL);
3280                 if (!dn_log_port_id) {
3281                         pr_err("bad device node: eth_dn name=%s\n",
3282                                eth_dn->full_name);
3283                         continue;
3284                 }
3285
3286                 if (ehea_add_adapter_mr(adapter)) {
3287                         pr_err("creating MR failed\n");
3288                         of_node_put(eth_dn);
3289                         return -EIO;
3290                 }
3291
3292                 adapter->port[i] = ehea_setup_single_port(adapter,
3293                                                           *dn_log_port_id,
3294                                                           eth_dn);
3295                 if (adapter->port[i])
3296                         netdev_info(adapter->port[i]->netdev,
3297                                     "logical port id #%d\n", *dn_log_port_id);
3298                 else
3299                         ehea_remove_adapter_mr(adapter);
3300
3301                 i++;
3302         }
3303         return 0;
3304 }
3305
3306 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3307                                            u32 logical_port_id)
3308 {
3309         struct device_node *lhea_dn;
3310         struct device_node *eth_dn = NULL;
3311         const u32 *dn_log_port_id;
3312
3313         lhea_dn = adapter->ofdev->dev.of_node;
3314         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3315
3316                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3317                                                  NULL);
3318                 if (dn_log_port_id)
3319                         if (*dn_log_port_id == logical_port_id)
3320                                 return eth_dn;
3321         }
3322
3323         return NULL;
3324 }
3325
3326 static ssize_t ehea_probe_port(struct device *dev,
3327                                struct device_attribute *attr,
3328                                const char *buf, size_t count)
3329 {
3330         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3331         struct ehea_port *port;
3332         struct device_node *eth_dn = NULL;
3333         int i;
3334
3335         u32 logical_port_id;
3336
3337         sscanf(buf, "%d", &logical_port_id);
3338
3339         port = ehea_get_port(adapter, logical_port_id);
3340
3341         if (port) {
3342                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3343                             logical_port_id);
3344                 return -EINVAL;
3345         }
3346
3347         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3348
3349         if (!eth_dn) {
3350                 pr_info("no logical port with id %d found\n", logical_port_id);
3351                 return -EINVAL;
3352         }
3353
3354         if (ehea_add_adapter_mr(adapter)) {
3355                 pr_err("creating MR failed\n");
3356                 return -EIO;
3357         }
3358
3359         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3360
3361         of_node_put(eth_dn);
3362
3363         if (port) {
3364                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3365                         if (!adapter->port[i]) {
3366                                 adapter->port[i] = port;
3367                                 break;
3368                         }
3369
3370                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3371                             logical_port_id);
3372         } else {
3373                 ehea_remove_adapter_mr(adapter);
3374                 return -EIO;
3375         }
3376
3377         return (ssize_t) count;
3378 }
3379
3380 static ssize_t ehea_remove_port(struct device *dev,
3381                                 struct device_attribute *attr,
3382                                 const char *buf, size_t count)
3383 {
3384         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3385         struct ehea_port *port;
3386         int i;
3387         u32 logical_port_id;
3388
3389         sscanf(buf, "%d", &logical_port_id);
3390
3391         port = ehea_get_port(adapter, logical_port_id);
3392
3393         if (port) {
3394                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3395                             logical_port_id);
3396
3397                 ehea_shutdown_single_port(port);
3398
3399                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3400                         if (adapter->port[i] == port) {
3401                                 adapter->port[i] = NULL;
3402                                 break;
3403                         }
3404         } else {
3405                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3406                        logical_port_id);
3407                 return -EINVAL;
3408         }
3409
3410         ehea_remove_adapter_mr(adapter);
3411
3412         return (ssize_t) count;
3413 }
3414
3415 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3416 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3417
3418 int ehea_create_device_sysfs(struct platform_device *dev)
3419 {
3420         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3421         if (ret)
3422                 goto out;
3423
3424         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3425 out:
3426         return ret;
3427 }
3428
3429 void ehea_remove_device_sysfs(struct platform_device *dev)
3430 {
3431         device_remove_file(&dev->dev, &dev_attr_probe_port);
3432         device_remove_file(&dev->dev, &dev_attr_remove_port);
3433 }
3434
3435 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3436                                         const struct of_device_id *id)
3437 {
3438         struct ehea_adapter *adapter;
3439         const u64 *adapter_handle;
3440         int ret;
3441
3442         if (!dev || !dev->dev.of_node) {
3443                 pr_err("Invalid ibmebus device probed\n");
3444                 return -EINVAL;
3445         }
3446
3447         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3448         if (!adapter) {
3449                 ret = -ENOMEM;
3450                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3451                 goto out;
3452         }
3453
3454         list_add(&adapter->list, &adapter_list);
3455
3456         adapter->ofdev = dev;
3457
3458         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3459                                          NULL);
3460         if (adapter_handle)
3461                 adapter->handle = *adapter_handle;
3462
3463         if (!adapter->handle) {
3464                 dev_err(&dev->dev, "failed getting handle for adapter"
3465                         " '%s'\n", dev->dev.of_node->full_name);
3466                 ret = -ENODEV;
3467                 goto out_free_ad;
3468         }
3469
3470         adapter->pd = EHEA_PD_ID;
3471
3472         dev_set_drvdata(&dev->dev, adapter);
3473
3474
3475         /* initialize adapter and ports */
3476         /* get adapter properties */
3477         ret = ehea_sense_adapter_attr(adapter);
3478         if (ret) {
3479                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3480                 goto out_free_ad;
3481         }
3482
3483         adapter->neq = ehea_create_eq(adapter,
3484                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3485         if (!adapter->neq) {
3486                 ret = -EIO;
3487                 dev_err(&dev->dev, "NEQ creation failed\n");
3488                 goto out_free_ad;
3489         }
3490
3491         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3492                      (unsigned long)adapter);
3493
3494         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3495                                   ehea_interrupt_neq, IRQF_DISABLED,
3496                                   "ehea_neq", adapter);
3497         if (ret) {
3498                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3499                 goto out_kill_eq;
3500         }
3501
3502         ret = ehea_create_device_sysfs(dev);
3503         if (ret)
3504                 goto out_free_irq;
3505
3506         ret = ehea_setup_ports(adapter);
3507         if (ret) {
3508                 dev_err(&dev->dev, "setup_ports failed\n");
3509                 goto out_rem_dev_sysfs;
3510         }
3511
3512         ret = 0;
3513         goto out;
3514
3515 out_rem_dev_sysfs:
3516         ehea_remove_device_sysfs(dev);
3517
3518 out_free_irq:
3519         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3520
3521 out_kill_eq:
3522         ehea_destroy_eq(adapter->neq);
3523
3524 out_free_ad:
3525         list_del(&adapter->list);
3526         kfree(adapter);
3527
3528 out:
3529         ehea_update_firmware_handles();
3530
3531         return ret;
3532 }
3533
3534 static int __devexit ehea_remove(struct platform_device *dev)
3535 {
3536         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3537         int i;
3538
3539         for (i = 0; i < EHEA_MAX_PORTS; i++)
3540                 if (adapter->port[i]) {
3541                         ehea_shutdown_single_port(adapter->port[i]);
3542                         adapter->port[i] = NULL;
3543                 }
3544
3545         ehea_remove_device_sysfs(dev);
3546
3547         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3548         tasklet_kill(&adapter->neq_tasklet);
3549
3550         ehea_destroy_eq(adapter->neq);
3551         ehea_remove_adapter_mr(adapter);
3552         list_del(&adapter->list);
3553         kfree(adapter);
3554
3555         ehea_update_firmware_handles();
3556
3557         return 0;
3558 }
3559
3560 void ehea_crash_handler(void)
3561 {
3562         int i;
3563
3564         if (ehea_fw_handles.arr)
3565                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3566                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3567                                              ehea_fw_handles.arr[i].fwh,
3568                                              FORCE_FREE);
3569
3570         if (ehea_bcmc_regs.arr)
3571                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3572                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3573                                               ehea_bcmc_regs.arr[i].port_id,
3574                                               ehea_bcmc_regs.arr[i].reg_type,
3575                                               ehea_bcmc_regs.arr[i].macaddr,
3576                                               0, H_DEREG_BCMC);
3577 }
3578
3579 static int ehea_mem_notifier(struct notifier_block *nb,
3580                              unsigned long action, void *data)
3581 {
3582         int ret = NOTIFY_BAD;
3583         struct memory_notify *arg = data;
3584
3585         mutex_lock(&dlpar_mem_lock);
3586
3587         switch (action) {
3588         case MEM_CANCEL_OFFLINE:
3589                 pr_info("memory offlining canceled");
3590                 /* Readd canceled memory block */
3591         case MEM_ONLINE:
3592                 pr_info("memory is going online");
3593                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3594                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3595                         goto out_unlock;
3596                 ehea_rereg_mrs();
3597                 break;
3598         case MEM_GOING_OFFLINE:
3599                 pr_info("memory is going offline");
3600                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3601                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3602                         goto out_unlock;
3603                 ehea_rereg_mrs();
3604                 break;
3605         default:
3606                 break;
3607         }
3608
3609         ehea_update_firmware_handles();
3610         ret = NOTIFY_OK;
3611
3612 out_unlock:
3613         mutex_unlock(&dlpar_mem_lock);
3614         return ret;
3615 }
3616
3617 static struct notifier_block ehea_mem_nb = {
3618         .notifier_call = ehea_mem_notifier,
3619 };
3620
3621 static int ehea_reboot_notifier(struct notifier_block *nb,
3622                                 unsigned long action, void *unused)
3623 {
3624         if (action == SYS_RESTART) {
3625                 pr_info("Reboot: freeing all eHEA resources\n");
3626                 ibmebus_unregister_driver(&ehea_driver);
3627         }
3628         return NOTIFY_DONE;
3629 }
3630
3631 static struct notifier_block ehea_reboot_nb = {
3632         .notifier_call = ehea_reboot_notifier,
3633 };
3634
3635 static int check_module_parm(void)
3636 {
3637         int ret = 0;
3638
3639         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3640             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3641                 pr_info("Bad parameter: rq1_entries\n");
3642                 ret = -EINVAL;
3643         }
3644         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3645             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3646                 pr_info("Bad parameter: rq2_entries\n");
3647                 ret = -EINVAL;
3648         }
3649         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3650             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3651                 pr_info("Bad parameter: rq3_entries\n");
3652                 ret = -EINVAL;
3653         }
3654         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3655             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3656                 pr_info("Bad parameter: sq_entries\n");
3657                 ret = -EINVAL;
3658         }
3659
3660         return ret;
3661 }
3662
3663 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3664                                       char *buf)
3665 {
3666         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3667 }
3668
3669 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3670                    ehea_show_capabilities, NULL);
3671
3672 int __init ehea_module_init(void)
3673 {
3674         int ret;
3675
3676         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3677
3678         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3679         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3680
3681         mutex_init(&ehea_fw_handles.lock);
3682         spin_lock_init(&ehea_bcmc_regs.lock);
3683
3684         ret = check_module_parm();
3685         if (ret)
3686                 goto out;
3687
3688         ret = ehea_create_busmap();
3689         if (ret)
3690                 goto out;
3691
3692         ret = register_reboot_notifier(&ehea_reboot_nb);
3693         if (ret)
3694                 pr_info("failed registering reboot notifier\n");
3695
3696         ret = register_memory_notifier(&ehea_mem_nb);
3697         if (ret)
3698                 pr_info("failed registering memory remove notifier\n");
3699
3700         ret = crash_shutdown_register(ehea_crash_handler);
3701         if (ret)
3702                 pr_info("failed registering crash handler\n");
3703
3704         ret = ibmebus_register_driver(&ehea_driver);
3705         if (ret) {
3706                 pr_err("failed registering eHEA device driver on ebus\n");
3707                 goto out2;
3708         }
3709
3710         ret = driver_create_file(&ehea_driver.driver,
3711                                  &driver_attr_capabilities);
3712         if (ret) {
3713                 pr_err("failed to register capabilities attribute, ret=%d\n",
3714                        ret);
3715                 goto out3;
3716         }
3717
3718         return ret;
3719
3720 out3:
3721         ibmebus_unregister_driver(&ehea_driver);
3722 out2:
3723         unregister_memory_notifier(&ehea_mem_nb);
3724         unregister_reboot_notifier(&ehea_reboot_nb);
3725         crash_shutdown_unregister(ehea_crash_handler);
3726 out:
3727         return ret;
3728 }
3729
3730 static void __exit ehea_module_exit(void)
3731 {
3732         int ret;
3733
3734         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3735         ibmebus_unregister_driver(&ehea_driver);
3736         unregister_reboot_notifier(&ehea_reboot_nb);
3737         ret = crash_shutdown_unregister(ehea_crash_handler);
3738         if (ret)
3739                 pr_info("failed unregistering crash handler\n");
3740         unregister_memory_notifier(&ehea_mem_nb);
3741         kfree(ehea_fw_handles.arr);
3742         kfree(ehea_bcmc_regs.arr);
3743         ehea_destroy_busmap();
3744 }
3745
3746 module_init(ehea_module_init);
3747 module_exit(ehea_module_exit);