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;
  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, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  98
  99 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
 100                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 101 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 102                  "Default = 0");
 103
 104 static int port_name_cnt;
 105 static LIST_HEAD(adapter_list);
 106 static unsigned long ehea_driver_flags;
 107 static DEFINE_MUTEX(dlpar_mem_lock);
 108 struct ehea_fw_handle_array ehea_fw_handles;
 109 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 110
 111
 112 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 113                                         const struct of_device_id *id);
 114
 115 static int __devexit ehea_remove(struct platform_device *dev);
 116
 117 static struct of_device_id ehea_device_table[] = {
 118         {
 119                 .name = "lhea",
 120                 .compatible = "IBM,lhea",
 121         },
 122         {},
 123 };
 124 MODULE_DEVICE_TABLE(of, ehea_device_table);
 125
 126 static struct of_platform_driver ehea_driver = {
 127         .driver = {
 128                 .name = "ehea",
 129                 .owner = THIS_MODULE,
 130                 .of_match_table = ehea_device_table,
 131         },
 132         .probe = ehea_probe_adapter,
 133         .remove = ehea_remove,
 134 };
 135
 136 void ehea_dump(void *adr, int len, char *msg)
 137 {
 138         int x;
 139         unsigned char *deb = adr;
 140         for (x = 0; x < len; x += 16) {
 141                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 142                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 143                 deb += 16;
 144         }
 145 }
 146
 147 void ehea_schedule_port_reset(struct ehea_port *port)
 148 {
 149         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 150                 schedule_work(&port->reset_task);
 151 }
 152
 153 static void ehea_update_firmware_handles(void)
 154 {
 155         struct ehea_fw_handle_entry *arr = NULL;
 156         struct ehea_adapter *adapter;
 157         int num_adapters = 0;
 158         int num_ports = 0;
 159         int num_portres = 0;
 160         int i = 0;
 161         int num_fw_handles, k, l;
 162
 163         /* Determine number of handles */
 164         mutex_lock(&ehea_fw_handles.lock);
 165
 166         list_for_each_entry(adapter, &adapter_list, list) {
 167                 num_adapters++;
 168
 169                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 170                         struct ehea_port *port = adapter->port[k];
 171
 172                         if (!port || (port->state != EHEA_PORT_UP))
 173                                 continue;
 174
 175                         num_ports++;
 176                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 177                 }
 178         }
 179
 180         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 181                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 182                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 183
 184         if (num_fw_handles) {
 185                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 186                 if (!arr)
 187                         goto out;  /* Keep the existing array */
 188         } else
 189                 goto out_update;
 190
 191         list_for_each_entry(adapter, &adapter_list, list) {
 192                 if (num_adapters == 0)
 193                         break;
 194
 195                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 196                         struct ehea_port *port = adapter->port[k];
 197
 198                         if (!port || (port->state != EHEA_PORT_UP) ||
 199                             (num_ports == 0))
 200                                 continue;
 201
 202                         for (l = 0;
 203                              l < port->num_def_qps + port->num_add_tx_qps;
 204                              l++) {
 205                                 struct ehea_port_res *pr = &port->port_res[l];
 206
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->qp->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->send_cq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->eq->fw_handle;
 215                                 arr[i].adh = adapter->handle;
 216                                 arr[i++].fwh = pr->send_mr.handle;
 217                                 arr[i].adh = adapter->handle;
 218                                 arr[i++].fwh = pr->recv_mr.handle;
 219                         }
 220                         arr[i].adh = adapter->handle;
 221                         arr[i++].fwh = port->qp_eq->fw_handle;
 222                         num_ports--;
 223                 }
 224
 225                 arr[i].adh = adapter->handle;
 226                 arr[i++].fwh = adapter->neq->fw_handle;
 227
 228                 if (adapter->mr.handle) {
 229                         arr[i].adh = adapter->handle;
 230                         arr[i++].fwh = adapter->mr.handle;
 231                 }
 232                 num_adapters--;
 233         }
 234
 235 out_update:
 236         kfree(ehea_fw_handles.arr);
 237         ehea_fw_handles.arr = arr;
 238         ehea_fw_handles.num_entries = i;
 239 out:
 240         mutex_unlock(&ehea_fw_handles.lock);
 241 }
 242
 243 static void ehea_update_bcmc_registrations(void)
 244 {
 245         unsigned long flags;
 246         struct ehea_bcmc_reg_entry *arr = NULL;
 247         struct ehea_adapter *adapter;
 248         struct ehea_mc_list *mc_entry;
 249         int num_registrations = 0;
 250         int i = 0;
 251         int k;
 252
 253         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 254
 255         /* Determine number of registrations */
 256         list_for_each_entry(adapter, &adapter_list, list)
 257                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 258                         struct ehea_port *port = adapter->port[k];
 259
 260                         if (!port || (port->state != EHEA_PORT_UP))
 261                                 continue;
 262
 263                         num_registrations += 2; /* Broadcast registrations */
 264
 265                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 266                                 num_registrations += 2;
 267                 }
 268
 269         if (num_registrations) {
 270                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 271                 if (!arr)
 272                         goto out;  /* Keep the existing array */
 273         } else
 274                 goto out_update;
 275
 276         list_for_each_entry(adapter, &adapter_list, list) {
 277                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 278                         struct ehea_port *port = adapter->port[k];
 279
 280                         if (!port || (port->state != EHEA_PORT_UP))
 281                                 continue;
 282
 283                         if (num_registrations == 0)
 284                                 goto out_update;
 285
 286                         arr[i].adh = adapter->handle;
 287                         arr[i].port_id = port->logical_port_id;
 288                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 289                                           EHEA_BCMC_UNTAGGED;
 290                         arr[i++].macaddr = port->mac_addr;
 291
 292                         arr[i].adh = adapter->handle;
 293                         arr[i].port_id = port->logical_port_id;
 294                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 295                                           EHEA_BCMC_VLANID_ALL;
 296                         arr[i++].macaddr = port->mac_addr;
 297                         num_registrations -= 2;
 298
 299                         list_for_each_entry(mc_entry,
 300                                             &port->mc_list->list, list) {
 301                                 if (num_registrations == 0)
 302                                         goto out_update;
 303
 304                                 arr[i].adh = adapter->handle;
 305                                 arr[i].port_id = port->logical_port_id;
 306                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 307                                                   EHEA_BCMC_MULTICAST |
 308                                                   EHEA_BCMC_UNTAGGED;
 309                                 arr[i++].macaddr = mc_entry->macaddr;
 310
 311                                 arr[i].adh = adapter->handle;
 312                                 arr[i].port_id = port->logical_port_id;
 313                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 314                                                   EHEA_BCMC_MULTICAST |
 315                                                   EHEA_BCMC_VLANID_ALL;
 316                                 arr[i++].macaddr = mc_entry->macaddr;
 317                                 num_registrations -= 2;
 318                         }
 319                 }
 320         }
 321
 322 out_update:
 323         kfree(ehea_bcmc_regs.arr);
 324         ehea_bcmc_regs.arr = arr;
 325         ehea_bcmc_regs.num_entries = i;
 326 out:
 327         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 328 }
 329
 330 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 331 {
 332         struct ehea_port *port = netdev_priv(dev);
 333         struct net_device_stats *stats = &port->stats;
 334         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 335         int i;
 336
 337         for (i = 0; i < port->num_def_qps; i++) {
 338                 rx_packets += port->port_res[i].rx_packets;
 339                 rx_bytes   += port->port_res[i].rx_bytes;
 340         }
 341
 342         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 343                 tx_packets += port->port_res[i].tx_packets;
 344                 tx_bytes   += port->port_res[i].tx_bytes;
 345         }
 346
 347         stats->tx_packets = tx_packets;
 348         stats->rx_bytes = rx_bytes;
 349         stats->tx_bytes = tx_bytes;
 350         stats->rx_packets = rx_packets;
 351
 352         return &port->stats;
 353 }
 354
 355 static void ehea_update_stats(struct work_struct *work)
 356 {
 357         struct ehea_port *port =
 358                 container_of(work, struct ehea_port, stats_work.work);
 359         struct net_device *dev = port->netdev;
 360         struct net_device_stats *stats = &port->stats;
 361         struct hcp_ehea_port_cb2 *cb2;
 362         u64 hret;
 363
 364         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 365         if (!cb2) {
 366                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 367                 goto resched;
 368         }
 369
 370         hret = ehea_h_query_ehea_port(port->adapter->handle,
 371                                       port->logical_port_id,
 372                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 373         if (hret != H_SUCCESS) {
 374                 netdev_err(dev, "query_ehea_port failed\n");
 375                 goto out_herr;
 376         }
 377
 378         if (netif_msg_hw(port))
 379                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 380
 381         stats->multicast = cb2->rxmcp;
 382         stats->rx_errors = cb2->rxuerr;
 383
 384 out_herr:
 385         free_page((unsigned long)cb2);
 386 resched:
 387         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 388 }
 389
 390 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 391 {
 392         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 393         struct net_device *dev = pr->port->netdev;
 394         int max_index_mask = pr->rq1_skba.len - 1;
 395         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 396         int adder = 0;
 397         int i;
 398
 399         pr->rq1_skba.os_skbs = 0;
 400
 401         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 402                 if (nr_of_wqes > 0)
 403                         pr->rq1_skba.index = index;
 404                 pr->rq1_skba.os_skbs = fill_wqes;
 405                 return;
 406         }
 407
 408         for (i = 0; i < fill_wqes; i++) {
 409                 if (!skb_arr_rq1[index]) {
 410                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 411                                                               EHEA_L_PKT_SIZE);
 412                         if (!skb_arr_rq1[index]) {
 413                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 414                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 415                                 break;
 416                         }
 417                 }
 418                 index--;
 419                 index &= max_index_mask;
 420                 adder++;
 421         }
 422
 423         if (adder == 0)
 424                 return;
 425
 426         /* Ring doorbell */
 427         ehea_update_rq1a(pr->qp, adder);
 428 }
 429
 430 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 431 {
 432         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 433         struct net_device *dev = pr->port->netdev;
 434         int i;
 435
 436         if (nr_rq1a > pr->rq1_skba.len) {
 437                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 438                 return;
 439         }
 440
 441         for (i = 0; i < nr_rq1a; i++) {
 442                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 443                 if (!skb_arr_rq1[i]) {
 444                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 445                         break;
 446                 }
 447         }
 448         /* Ring doorbell */
 449         ehea_update_rq1a(pr->qp, i - 1);
 450 }
 451
 452 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 453                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 454                               int num_wqes, int wqe_type, int packet_size)
 455 {
 456         struct net_device *dev = pr->port->netdev;
 457         struct ehea_qp *qp = pr->qp;
 458         struct sk_buff **skb_arr = q_skba->arr;
 459         struct ehea_rwqe *rwqe;
 460         int i, index, max_index_mask, fill_wqes;
 461         int adder = 0;
 462         int ret = 0;
 463
 464         fill_wqes = q_skba->os_skbs + num_wqes;
 465         q_skba->os_skbs = 0;
 466
 467         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 468                 q_skba->os_skbs = fill_wqes;
 469                 return ret;
 470         }
 471
 472         index = q_skba->index;
 473         max_index_mask = q_skba->len - 1;
 474         for (i = 0; i < fill_wqes; i++) {
 475                 u64 tmp_addr;
 476                 struct sk_buff *skb;
 477
 478                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 479                 if (!skb) {
 480                         q_skba->os_skbs = fill_wqes - i;
 481                         if (q_skba->os_skbs == q_skba->len - 2) {
 482                                 netdev_info(pr->port->netdev,
 483                                             "rq%i ran dry - no mem for skb\n",
 484                                             rq_nr);
 485                                 ret = -ENOMEM;
 486                         }
 487                         break;
 488                 }
 489
 490                 skb_arr[index] = skb;
 491                 tmp_addr = ehea_map_vaddr(skb->data);
 492                 if (tmp_addr == -1) {
 493                         dev_kfree_skb(skb);
 494                         q_skba->os_skbs = fill_wqes - i;
 495                         ret = 0;
 496                         break;
 497                 }
 498
 499                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 500                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 501                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 502                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 503                 rwqe->sg_list[0].vaddr = tmp_addr;
 504                 rwqe->sg_list[0].len = packet_size;
 505                 rwqe->data_segments = 1;
 506
 507                 index++;
 508                 index &= max_index_mask;
 509                 adder++;
 510         }
 511
 512         q_skba->index = index;
 513         if (adder == 0)
 514                 goto out;
 515
 516         /* Ring doorbell */
 517         iosync();
 518         if (rq_nr == 2)
 519                 ehea_update_rq2a(pr->qp, adder);
 520         else
 521                 ehea_update_rq3a(pr->qp, adder);
 522 out:
 523         return ret;
 524 }
 525
 526
 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 528 {
 529         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 530                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 531                                   EHEA_RQ2_PKT_SIZE);
 532 }
 533
 534
 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 536 {
 537         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 538                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 539                                   EHEA_MAX_PACKET_SIZE);
 540 }
 541
 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 543 {
 544         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 545         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 546                 return 0;
 547         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 548             (cqe->header_length == 0))
 549                 return 0;
 550         return -EINVAL;
 551 }
 552
 553 static inline void ehea_fill_skb(struct net_device *dev,
 554                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 555 {
 556         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 557
 558         skb_put(skb, length);
 559         skb->protocol = eth_type_trans(skb, dev);
 560
 561         /* The packet was not an IPV4 packet so a complemented checksum was
 562            calculated. The value is found in the Internet Checksum field. */
 563         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 564                 skb->ip_summed = CHECKSUM_COMPLETE;
 565                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 566         } else
 567                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 568 }
 569
 570 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 571                                                int arr_len,
 572                                                struct ehea_cqe *cqe)
 573 {
 574         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 575         struct sk_buff *skb;
 576         void *pref;
 577         int x;
 578
 579         x = skb_index + 1;
 580         x &= (arr_len - 1);
 581
 582         pref = skb_array[x];
 583         if (pref) {
 584                 prefetchw(pref);
 585                 prefetchw(pref + EHEA_CACHE_LINE);
 586
 587                 pref = (skb_array[x]->data);
 588                 prefetch(pref);
 589                 prefetch(pref + EHEA_CACHE_LINE);
 590                 prefetch(pref + EHEA_CACHE_LINE * 2);
 591                 prefetch(pref + EHEA_CACHE_LINE * 3);
 592         }
 593
 594         skb = skb_array[skb_index];
 595         skb_array[skb_index] = NULL;
 596         return skb;
 597 }
 598
 599 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 600                                                   int arr_len, int wqe_index)
 601 {
 602         struct sk_buff *skb;
 603         void *pref;
 604         int x;
 605
 606         x = wqe_index + 1;
 607         x &= (arr_len - 1);
 608
 609         pref = skb_array[x];
 610         if (pref) {
 611                 prefetchw(pref);
 612                 prefetchw(pref + EHEA_CACHE_LINE);
 613
 614                 pref = (skb_array[x]->data);
 615                 prefetchw(pref);
 616                 prefetchw(pref + EHEA_CACHE_LINE);
 617         }
 618
 619         skb = skb_array[wqe_index];
 620         skb_array[wqe_index] = NULL;
 621         return skb;
 622 }
 623
 624 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 625                                  struct ehea_cqe *cqe, int *processed_rq2,
 626                                  int *processed_rq3)
 627 {
 628         struct sk_buff *skb;
 629
 630         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 631                 pr->p_stats.err_tcp_cksum++;
 632         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 633                 pr->p_stats.err_ip_cksum++;
 634         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 635                 pr->p_stats.err_frame_crc++;
 636
 637         if (rq == 2) {
 638                 *processed_rq2 += 1;
 639                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 640                 dev_kfree_skb(skb);
 641         } else if (rq == 3) {
 642                 *processed_rq3 += 1;
 643                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 644                 dev_kfree_skb(skb);
 645         }
 646
 647         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 648                 if (netif_msg_rx_err(pr->port)) {
 649                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 650                                pr->qp->init_attr.qp_nr);
 651                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 652                 }
 653                 ehea_schedule_port_reset(pr->port);
 654                 return 1;
 655         }
 656
 657         return 0;
 658 }
 659
 660 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 661                        void **tcph, u64 *hdr_flags, void *priv)
 662 {
 663         struct ehea_cqe *cqe = priv;
 664         unsigned int ip_len;
 665         struct iphdr *iph;
 666
 667         /* non tcp/udp packets */
 668         if (!cqe->header_length)
 669                 return -1;
 670
 671         /* non tcp packet */
 672         skb_reset_network_header(skb);
 673         iph = ip_hdr(skb);
 674         if (iph->protocol != IPPROTO_TCP)
 675                 return -1;
 676
 677         ip_len = ip_hdrlen(skb);
 678         skb_set_transport_header(skb, ip_len);
 679         *tcph = tcp_hdr(skb);
 680
 681         /* check if ip header and tcp header are complete */
 682         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 683                 return -1;
 684
 685         *hdr_flags = LRO_IPV4 | LRO_TCP;
 686         *iphdr = iph;
 687
 688         return 0;
 689 }
 690
 691 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 692                           struct sk_buff *skb)
 693 {
 694         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 695                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 696
 697         if (skb->dev->features & NETIF_F_LRO)
 698                 lro_receive_skb(&pr->lro_mgr, skb, cqe);
 699         else
 700                 netif_receive_skb(skb);
 701 }
 702
 703 static int ehea_proc_rwqes(struct net_device *dev,
 704                            struct ehea_port_res *pr,
 705                            int budget)
 706 {
 707         struct ehea_port *port = pr->port;
 708         struct ehea_qp *qp = pr->qp;
 709         struct ehea_cqe *cqe;
 710         struct sk_buff *skb;
 711         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 712         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 713         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 714         int skb_arr_rq1_len = pr->rq1_skba.len;
 715         int skb_arr_rq2_len = pr->rq2_skba.len;
 716         int skb_arr_rq3_len = pr->rq3_skba.len;
 717         int processed, processed_rq1, processed_rq2, processed_rq3;
 718         u64 processed_bytes = 0;
 719         int wqe_index, last_wqe_index, rq, port_reset;
 720
 721         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 722         last_wqe_index = 0;
 723
 724         cqe = ehea_poll_rq1(qp, &wqe_index);
 725         while ((processed < budget) && cqe) {
 726                 ehea_inc_rq1(qp);
 727                 processed_rq1++;
 728                 processed++;
 729                 if (netif_msg_rx_status(port))
 730                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 731
 732                 last_wqe_index = wqe_index;
 733                 rmb();
 734                 if (!ehea_check_cqe(cqe, &rq)) {
 735                         if (rq == 1) {
 736                                 /* LL RQ1 */
 737                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 738                                                           skb_arr_rq1_len,
 739                                                           wqe_index);
 740                                 if (unlikely(!skb)) {
 741                                         netif_info(port, rx_err, dev,
 742                                                   "LL rq1: skb=NULL\n");
 743
 744                                         skb = netdev_alloc_skb(dev,
 745                                                                EHEA_L_PKT_SIZE);
 746                                         if (!skb) {
 747                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 748                                                 break;
 749                                         }
 750                                 }
 751                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 752                                                  cqe->num_bytes_transfered - 4);
 753                                 ehea_fill_skb(dev, skb, cqe);
 754                         } else if (rq == 2) {
 755                                 /* RQ2 */
 756                                 skb = get_skb_by_index(skb_arr_rq2,
 757                                                        skb_arr_rq2_len, cqe);
 758                                 if (unlikely(!skb)) {
 759                                         netif_err(port, rx_err, dev,
 760                                                   "rq2: skb=NULL\n");
 761                                         break;
 762                                 }
 763                                 ehea_fill_skb(dev, skb, cqe);
 764                                 processed_rq2++;
 765                         } else {
 766                                 /* RQ3 */
 767                                 skb = get_skb_by_index(skb_arr_rq3,
 768                                                        skb_arr_rq3_len, cqe);
 769                                 if (unlikely(!skb)) {
 770                                         netif_err(port, rx_err, dev,
 771                                                   "rq3: skb=NULL\n");
 772                                         break;
 773                                 }
 774                                 ehea_fill_skb(dev, skb, cqe);
 775                                 processed_rq3++;
 776                         }
 777
 778                         processed_bytes += skb->len;
 779                         ehea_proc_skb(pr, cqe, skb);
 780                 } else {
 781                         pr->p_stats.poll_receive_errors++;
 782                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 783                                                            &processed_rq2,
 784                                                            &processed_rq3);
 785                         if (port_reset)
 786                                 break;
 787                 }
 788                 cqe = ehea_poll_rq1(qp, &wqe_index);
 789         }
 790         if (dev->features & NETIF_F_LRO)
 791                 lro_flush_all(&pr->lro_mgr);
 792
 793         pr->rx_packets += processed;
 794         pr->rx_bytes += processed_bytes;
 795
 796         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 797         ehea_refill_rq2(pr, processed_rq2);
 798         ehea_refill_rq3(pr, processed_rq3);
 799
 800         return processed;
 801 }
 802
 803 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 804
 805 static void reset_sq_restart_flag(struct ehea_port *port)
 806 {
 807         int i;
 808
 809         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 810                 struct ehea_port_res *pr = &port->port_res[i];
 811                 pr->sq_restart_flag = 0;
 812         }
 813         wake_up(&port->restart_wq);
 814 }
 815
 816 static void check_sqs(struct ehea_port *port)
 817 {
 818         struct ehea_swqe *swqe;
 819         int swqe_index;
 820         int i, k;
 821
 822         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 823                 struct ehea_port_res *pr = &port->port_res[i];
 824                 int ret;
 825                 k = 0;
 826                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 827                 memset(swqe, 0, SWQE_HEADER_SIZE);
 828                 atomic_dec(&pr->swqe_avail);
 829
 830                 swqe->tx_control |= EHEA_SWQE_PURGE;
 831                 swqe->wr_id = SWQE_RESTART_CHECK;
 832                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 833                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 834                 swqe->immediate_data_length = 80;
 835
 836                 ehea_post_swqe(pr->qp, swqe);
 837
 838                 ret = wait_event_timeout(port->restart_wq,
 839                                          pr->sq_restart_flag == 0,
 840                                          msecs_to_jiffies(100));
 841
 842                 if (!ret) {
 843                         pr_err("HW/SW queues out of sync\n");
 844                         ehea_schedule_port_reset(pr->port);
 845                         return;
 846                 }
 847         }
 848 }
 849
 850
 851 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 852 {
 853         struct sk_buff *skb;
 854         struct ehea_cq *send_cq = pr->send_cq;
 855         struct ehea_cqe *cqe;
 856         int quota = my_quota;
 857         int cqe_counter = 0;
 858         int swqe_av = 0;
 859         int index;
 860         unsigned long flags;
 861
 862         cqe = ehea_poll_cq(send_cq);
 863         while (cqe && (quota > 0)) {
 864                 ehea_inc_cq(send_cq);
 865
 866                 cqe_counter++;
 867                 rmb();
 868
 869                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 870                         pr->sq_restart_flag = 1;
 871                         swqe_av++;
 872                         break;
 873                 }
 874
 875                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 876                         pr_err("Bad send completion status=0x%04X\n",
 877                                cqe->status);
 878
 879                         if (netif_msg_tx_err(pr->port))
 880                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 881
 882                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 883                                 pr_err("Resetting port\n");
 884                                 ehea_schedule_port_reset(pr->port);
 885                                 break;
 886                         }
 887                 }
 888
 889                 if (netif_msg_tx_done(pr->port))
 890                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 891
 892                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 893                            == EHEA_SWQE2_TYPE)) {
 894
 895                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 896                         skb = pr->sq_skba.arr[index];
 897                         dev_kfree_skb(skb);
 898                         pr->sq_skba.arr[index] = NULL;
 899                 }
 900
 901                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 902                 quota--;
 903
 904                 cqe = ehea_poll_cq(send_cq);
 905         }
 906
 907         ehea_update_feca(send_cq, cqe_counter);
 908         atomic_add(swqe_av, &pr->swqe_avail);
 909
 910         spin_lock_irqsave(&pr->netif_queue, flags);
 911
 912         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 913                                   >= pr->swqe_refill_th)) {
 914                 netif_wake_queue(pr->port->netdev);
 915                 pr->queue_stopped = 0;
 916         }
 917         spin_unlock_irqrestore(&pr->netif_queue, flags);
 918         wake_up(&pr->port->swqe_avail_wq);
 919
 920         return cqe;
 921 }
 922
 923 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 924 #define EHEA_POLL_MAX_CQES 65535
 925
 926 static int ehea_poll(struct napi_struct *napi, int budget)
 927 {
 928         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 929                                                 napi);
 930         struct net_device *dev = pr->port->netdev;
 931         struct ehea_cqe *cqe;
 932         struct ehea_cqe *cqe_skb = NULL;
 933         int force_irq, wqe_index;
 934         int rx = 0;
 935
 936         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 937         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 938
 939         if (!force_irq)
 940                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 941
 942         while ((rx != budget) || force_irq) {
 943                 pr->poll_counter = 0;
 944                 force_irq = 0;
 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         pr->poll_counter++;
 965         return rx;
 966 }
 967
 968 #ifdef CONFIG_NET_POLL_CONTROLLER
 969 static void ehea_netpoll(struct net_device *dev)
 970 {
 971         struct ehea_port *port = netdev_priv(dev);
 972         int i;
 973
 974         for (i = 0; i < port->num_def_qps; i++)
 975                 napi_schedule(&port->port_res[i].napi);
 976 }
 977 #endif
 978
 979 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 980 {
 981         struct ehea_port_res *pr = param;
 982
 983         napi_schedule(&pr->napi);
 984
 985         return IRQ_HANDLED;
 986 }
 987
 988 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 989 {
 990         struct ehea_port *port = param;
 991         struct ehea_eqe *eqe;
 992         struct ehea_qp *qp;
 993         u32 qp_token;
 994         u64 resource_type, aer, aerr;
 995         int reset_port = 0;
 996
 997         eqe = ehea_poll_eq(port->qp_eq);
 998
 999         while (eqe) {
1000                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1001                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1002                        eqe->entry, qp_token);
1003
1004                 qp = port->port_res[qp_token].qp;
1005
1006                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1007                                                 &aer, &aerr);
1008
1009                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1010                         if ((aer & EHEA_AER_RESET_MASK) ||
1011                             (aerr & EHEA_AERR_RESET_MASK))
1012                                  reset_port = 1;
1013                 } else
1014                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1015
1016                 eqe = ehea_poll_eq(port->qp_eq);
1017         }
1018
1019         if (reset_port) {
1020                 pr_err("Resetting port\n");
1021                 ehea_schedule_port_reset(port);
1022         }
1023
1024         return IRQ_HANDLED;
1025 }
1026
1027 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1028                                        int logical_port)
1029 {
1030         int i;
1031
1032         for (i = 0; i < EHEA_MAX_PORTS; i++)
1033                 if (adapter->port[i])
1034                         if (adapter->port[i]->logical_port_id == logical_port)
1035                                 return adapter->port[i];
1036         return NULL;
1037 }
1038
1039 int ehea_sense_port_attr(struct ehea_port *port)
1040 {
1041         int ret;
1042         u64 hret;
1043         struct hcp_ehea_port_cb0 *cb0;
1044
1045         /* may be called via ehea_neq_tasklet() */
1046         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1047         if (!cb0) {
1048                 pr_err("no mem for cb0\n");
1049                 ret = -ENOMEM;
1050                 goto out;
1051         }
1052
1053         hret = ehea_h_query_ehea_port(port->adapter->handle,
1054                                       port->logical_port_id, H_PORT_CB0,
1055                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1056                                       cb0);
1057         if (hret != H_SUCCESS) {
1058                 ret = -EIO;
1059                 goto out_free;
1060         }
1061
1062         /* MAC address */
1063         port->mac_addr = cb0->port_mac_addr << 16;
1064
1065         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1066                 ret = -EADDRNOTAVAIL;
1067                 goto out_free;
1068         }
1069
1070         /* Port speed */
1071         switch (cb0->port_speed) {
1072         case H_SPEED_10M_H:
1073                 port->port_speed = EHEA_SPEED_10M;
1074                 port->full_duplex = 0;
1075                 break;
1076         case H_SPEED_10M_F:
1077                 port->port_speed = EHEA_SPEED_10M;
1078                 port->full_duplex = 1;
1079                 break;
1080         case H_SPEED_100M_H:
1081                 port->port_speed = EHEA_SPEED_100M;
1082                 port->full_duplex = 0;
1083                 break;
1084         case H_SPEED_100M_F:
1085                 port->port_speed = EHEA_SPEED_100M;
1086                 port->full_duplex = 1;
1087                 break;
1088         case H_SPEED_1G_F:
1089                 port->port_speed = EHEA_SPEED_1G;
1090                 port->full_duplex = 1;
1091                 break;
1092         case H_SPEED_10G_F:
1093                 port->port_speed = EHEA_SPEED_10G;
1094                 port->full_duplex = 1;
1095                 break;
1096         default:
1097                 port->port_speed = 0;
1098                 port->full_duplex = 0;
1099                 break;
1100         }
1101
1102         port->autoneg = 1;
1103         port->num_mcs = cb0->num_default_qps;
1104
1105         /* Number of default QPs */
1106         if (use_mcs)
1107                 port->num_def_qps = cb0->num_default_qps;
1108         else
1109                 port->num_def_qps = 1;
1110
1111         if (!port->num_def_qps) {
1112                 ret = -EINVAL;
1113                 goto out_free;
1114         }
1115
1116         port->num_tx_qps = num_tx_qps;
1117
1118         if (port->num_def_qps >= port->num_tx_qps)
1119                 port->num_add_tx_qps = 0;
1120         else
1121                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1122
1123         ret = 0;
1124 out_free:
1125         if (ret || netif_msg_probe(port))
1126                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1127         free_page((unsigned long)cb0);
1128 out:
1129         return ret;
1130 }
1131
1132 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1133 {
1134         struct hcp_ehea_port_cb4 *cb4;
1135         u64 hret;
1136         int ret = 0;
1137
1138         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1139         if (!cb4) {
1140                 pr_err("no mem for cb4\n");
1141                 ret = -ENOMEM;
1142                 goto out;
1143         }
1144
1145         cb4->port_speed = port_speed;
1146
1147         netif_carrier_off(port->netdev);
1148
1149         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1150                                        port->logical_port_id,
1151                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1152         if (hret == H_SUCCESS) {
1153                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1154
1155                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1156                                               port->logical_port_id,
1157                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1158                                               cb4);
1159                 if (hret == H_SUCCESS) {
1160                         switch (cb4->port_speed) {
1161                         case H_SPEED_10M_H:
1162                                 port->port_speed = EHEA_SPEED_10M;
1163                                 port->full_duplex = 0;
1164                                 break;
1165                         case H_SPEED_10M_F:
1166                                 port->port_speed = EHEA_SPEED_10M;
1167                                 port->full_duplex = 1;
1168                                 break;
1169                         case H_SPEED_100M_H:
1170                                 port->port_speed = EHEA_SPEED_100M;
1171                                 port->full_duplex = 0;
1172                                 break;
1173                         case H_SPEED_100M_F:
1174                                 port->port_speed = EHEA_SPEED_100M;
1175                                 port->full_duplex = 1;
1176                                 break;
1177                         case H_SPEED_1G_F:
1178                                 port->port_speed = EHEA_SPEED_1G;
1179                                 port->full_duplex = 1;
1180                                 break;
1181                         case H_SPEED_10G_F:
1182                                 port->port_speed = EHEA_SPEED_10G;
1183                                 port->full_duplex = 1;
1184                                 break;
1185                         default:
1186                                 port->port_speed = 0;
1187                                 port->full_duplex = 0;
1188                                 break;
1189                         }
1190                 } else {
1191                         pr_err("Failed sensing port speed\n");
1192                         ret = -EIO;
1193                 }
1194         } else {
1195                 if (hret == H_AUTHORITY) {
1196                         pr_info("Hypervisor denied setting port speed\n");
1197                         ret = -EPERM;
1198                 } else {
1199                         ret = -EIO;
1200                         pr_err("Failed setting port speed\n");
1201                 }
1202         }
1203         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1204                 netif_carrier_on(port->netdev);
1205
1206         free_page((unsigned long)cb4);
1207 out:
1208         return ret;
1209 }
1210
1211 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1212 {
1213         int ret;
1214         u8 ec;
1215         u8 portnum;
1216         struct ehea_port *port;
1217         struct net_device *dev;
1218
1219         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1220         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1221         port = ehea_get_port(adapter, portnum);
1222         dev = port->netdev;
1223
1224         switch (ec) {
1225         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1226
1227                 if (!port) {
1228                         netdev_err(dev, "unknown portnum %x\n", portnum);
1229                         break;
1230                 }
1231
1232                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1233                         if (!netif_carrier_ok(dev)) {
1234                                 ret = ehea_sense_port_attr(port);
1235                                 if (ret) {
1236                                         netdev_err(dev, "failed resensing port attributes\n");
1237                                         break;
1238                                 }
1239
1240                                 netif_info(port, link, dev,
1241                                            "Logical port up: %dMbps %s Duplex\n",
1242                                            port->port_speed,
1243                                            port->full_duplex == 1 ?
1244                                            "Full" : "Half");
1245
1246                                 netif_carrier_on(dev);
1247                                 netif_wake_queue(dev);
1248                         }
1249                 } else
1250                         if (netif_carrier_ok(dev)) {
1251                                 netif_info(port, link, dev,
1252                                            "Logical port down\n");
1253                                 netif_carrier_off(dev);
1254                                 netif_stop_queue(dev);
1255                         }
1256
1257                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1258                         port->phy_link = EHEA_PHY_LINK_UP;
1259                         netif_info(port, link, dev,
1260                                    "Physical port up\n");
1261                         if (prop_carrier_state)
1262                                 netif_carrier_on(dev);
1263                 } else {
1264                         port->phy_link = EHEA_PHY_LINK_DOWN;
1265                         netif_info(port, link, dev,
1266                                    "Physical port down\n");
1267                         if (prop_carrier_state)
1268                                 netif_carrier_off(dev);
1269                 }
1270
1271                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1272                         netdev_info(dev,
1273                                     "External switch port is primary port\n");
1274                 else
1275                         netdev_info(dev,
1276                                     "External switch port is backup port\n");
1277
1278                 break;
1279         case EHEA_EC_ADAPTER_MALFUNC:
1280                 netdev_err(dev, "Adapter malfunction\n");
1281                 break;
1282         case EHEA_EC_PORT_MALFUNC:
1283                 netdev_info(dev, "Port malfunction\n");
1284                 netif_carrier_off(dev);
1285                 netif_stop_queue(dev);
1286                 break;
1287         default:
1288                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1289                 break;
1290         }
1291 }
1292
1293 static void ehea_neq_tasklet(unsigned long data)
1294 {
1295         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1296         struct ehea_eqe *eqe;
1297         u64 event_mask;
1298
1299         eqe = ehea_poll_eq(adapter->neq);
1300         pr_debug("eqe=%p\n", eqe);
1301
1302         while (eqe) {
1303                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1304                 ehea_parse_eqe(adapter, eqe->entry);
1305                 eqe = ehea_poll_eq(adapter->neq);
1306                 pr_debug("next eqe=%p\n", eqe);
1307         }
1308
1309         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1310                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1311                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1312
1313         ehea_h_reset_events(adapter->handle,
1314                             adapter->neq->fw_handle, event_mask);
1315 }
1316
1317 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1318 {
1319         struct ehea_adapter *adapter = param;
1320         tasklet_hi_schedule(&adapter->neq_tasklet);
1321         return IRQ_HANDLED;
1322 }
1323
1324
1325 static int ehea_fill_port_res(struct ehea_port_res *pr)
1326 {
1327         int ret;
1328         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1329
1330         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1331
1332         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1333
1334         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1335
1336         return ret;
1337 }
1338
1339 static int ehea_reg_interrupts(struct net_device *dev)
1340 {
1341         struct ehea_port *port = netdev_priv(dev);
1342         struct ehea_port_res *pr;
1343         int i, ret;
1344
1345
1346         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1347                  dev->name);
1348
1349         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1350                                   ehea_qp_aff_irq_handler,
1351                                   IRQF_DISABLED, port->int_aff_name, port);
1352         if (ret) {
1353                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1354                            port->qp_eq->attr.ist1);
1355                 goto out_free_qpeq;
1356         }
1357
1358         netif_info(port, ifup, dev,
1359                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1360                    port->qp_eq->attr.ist1);
1361
1362
1363         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1364                 pr = &port->port_res[i];
1365                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1366                          "%s-queue%d", dev->name, i);
1367                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1368                                           ehea_recv_irq_handler,
1369                                           IRQF_DISABLED, pr->int_send_name,
1370                                           pr);
1371                 if (ret) {
1372                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1373                                    i, pr->eq->attr.ist1);
1374                         goto out_free_req;
1375                 }
1376                 netif_info(port, ifup, dev,
1377                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1378                            pr->eq->attr.ist1, i);
1379         }
1380 out:
1381         return ret;
1382
1383
1384 out_free_req:
1385         while (--i >= 0) {
1386                 u32 ist = port->port_res[i].eq->attr.ist1;
1387                 ibmebus_free_irq(ist, &port->port_res[i]);
1388         }
1389
1390 out_free_qpeq:
1391         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1392         i = port->num_def_qps;
1393
1394         goto out;
1395
1396 }
1397
1398 static void ehea_free_interrupts(struct net_device *dev)
1399 {
1400         struct ehea_port *port = netdev_priv(dev);
1401         struct ehea_port_res *pr;
1402         int i;
1403
1404         /* send */
1405
1406         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1407                 pr = &port->port_res[i];
1408                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1409                 netif_info(port, intr, dev,
1410                            "free send irq for res %d with handle 0x%X\n",
1411                            i, pr->eq->attr.ist1);
1412         }
1413
1414         /* associated events */
1415         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1416         netif_info(port, intr, dev,
1417                    "associated event interrupt for handle 0x%X freed\n",
1418                    port->qp_eq->attr.ist1);
1419 }
1420
1421 static int ehea_configure_port(struct ehea_port *port)
1422 {
1423         int ret, i;
1424         u64 hret, mask;
1425         struct hcp_ehea_port_cb0 *cb0;
1426
1427         ret = -ENOMEM;
1428         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1429         if (!cb0)
1430                 goto out;
1431
1432         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1433                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1434                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1435                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1436                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1437                                       PXLY_RC_VLAN_FILTER)
1438                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1439
1440         for (i = 0; i < port->num_mcs; i++)
1441                 if (use_mcs)
1442                         cb0->default_qpn_arr[i] =
1443                                 port->port_res[i].qp->init_attr.qp_nr;
1444                 else
1445                         cb0->default_qpn_arr[i] =
1446                                 port->port_res[0].qp->init_attr.qp_nr;
1447
1448         if (netif_msg_ifup(port))
1449                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1450
1451         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1452              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1453
1454         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1455                                        port->logical_port_id,
1456                                        H_PORT_CB0, mask, cb0);
1457         ret = -EIO;
1458         if (hret != H_SUCCESS)
1459                 goto out_free;
1460
1461         ret = 0;
1462
1463 out_free:
1464         free_page((unsigned long)cb0);
1465 out:
1466         return ret;
1467 }
1468
1469 int ehea_gen_smrs(struct ehea_port_res *pr)
1470 {
1471         int ret;
1472         struct ehea_adapter *adapter = pr->port->adapter;
1473
1474         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1475         if (ret)
1476                 goto out;
1477
1478         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1479         if (ret)
1480                 goto out_free;
1481
1482         return 0;
1483
1484 out_free:
1485         ehea_rem_mr(&pr->send_mr);
1486 out:
1487         pr_err("Generating SMRS failed\n");
1488         return -EIO;
1489 }
1490
1491 int ehea_rem_smrs(struct ehea_port_res *pr)
1492 {
1493         if ((ehea_rem_mr(&pr->send_mr)) ||
1494             (ehea_rem_mr(&pr->recv_mr)))
1495                 return -EIO;
1496         else
1497                 return 0;
1498 }
1499
1500 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1501 {
1502         int arr_size = sizeof(void *) * max_q_entries;
1503
1504         q_skba->arr = vzalloc(arr_size);
1505         if (!q_skba->arr)
1506                 return -ENOMEM;
1507
1508         q_skba->len = max_q_entries;
1509         q_skba->index = 0;
1510         q_skba->os_skbs = 0;
1511
1512         return 0;
1513 }
1514
1515 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1516                               struct port_res_cfg *pr_cfg, int queue_token)
1517 {
1518         struct ehea_adapter *adapter = port->adapter;
1519         enum ehea_eq_type eq_type = EHEA_EQ;
1520         struct ehea_qp_init_attr *init_attr = NULL;
1521         int ret = -EIO;
1522         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1523
1524         tx_bytes = pr->tx_bytes;
1525         tx_packets = pr->tx_packets;
1526         rx_bytes = pr->rx_bytes;
1527         rx_packets = pr->rx_packets;
1528
1529         memset(pr, 0, sizeof(struct ehea_port_res));
1530
1531         pr->tx_bytes = rx_bytes;
1532         pr->tx_packets = tx_packets;
1533         pr->rx_bytes = rx_bytes;
1534         pr->rx_packets = rx_packets;
1535
1536         pr->port = port;
1537         spin_lock_init(&pr->xmit_lock);
1538         spin_lock_init(&pr->netif_queue);
1539
1540         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1541         if (!pr->eq) {
1542                 pr_err("create_eq failed (eq)\n");
1543                 goto out_free;
1544         }
1545
1546         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1547                                      pr->eq->fw_handle,
1548                                      port->logical_port_id);
1549         if (!pr->recv_cq) {
1550                 pr_err("create_cq failed (cq_recv)\n");
1551                 goto out_free;
1552         }
1553
1554         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1555                                      pr->eq->fw_handle,
1556                                      port->logical_port_id);
1557         if (!pr->send_cq) {
1558                 pr_err("create_cq failed (cq_send)\n");
1559                 goto out_free;
1560         }
1561
1562         if (netif_msg_ifup(port))
1563                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1564                         pr->send_cq->attr.act_nr_of_cqes,
1565                         pr->recv_cq->attr.act_nr_of_cqes);
1566
1567         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1568         if (!init_attr) {
1569                 ret = -ENOMEM;
1570                 pr_err("no mem for ehea_qp_init_attr\n");
1571                 goto out_free;
1572         }
1573
1574         init_attr->low_lat_rq1 = 1;
1575         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1576         init_attr->rq_count = 3;
1577         init_attr->qp_token = queue_token;
1578         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1579         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1580         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1581         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1582         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1583         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1584         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1585         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1586         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1587         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1588         init_attr->port_nr = port->logical_port_id;
1589         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1590         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1591         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1592
1593         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1594         if (!pr->qp) {
1595                 pr_err("create_qp failed\n");
1596                 ret = -EIO;
1597                 goto out_free;
1598         }
1599
1600         if (netif_msg_ifup(port))
1601                 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",
1602                         init_attr->qp_nr,
1603                         init_attr->act_nr_send_wqes,
1604                         init_attr->act_nr_rwqes_rq1,
1605                         init_attr->act_nr_rwqes_rq2,
1606                         init_attr->act_nr_rwqes_rq3);
1607
1608         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1609
1610         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1611         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1612         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1613         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1614         if (ret)
1615                 goto out_free;
1616
1617         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1618         if (ehea_gen_smrs(pr) != 0) {
1619                 ret = -EIO;
1620                 goto out_free;
1621         }
1622
1623         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1624
1625         kfree(init_attr);
1626
1627         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1628
1629         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1630         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1631         pr->lro_mgr.lro_arr = pr->lro_desc;
1632         pr->lro_mgr.get_skb_header = get_skb_hdr;
1633         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1634         pr->lro_mgr.dev = port->netdev;
1635         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1636         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1637
1638         ret = 0;
1639         goto out;
1640
1641 out_free:
1642         kfree(init_attr);
1643         vfree(pr->sq_skba.arr);
1644         vfree(pr->rq1_skba.arr);
1645         vfree(pr->rq2_skba.arr);
1646         vfree(pr->rq3_skba.arr);
1647         ehea_destroy_qp(pr->qp);
1648         ehea_destroy_cq(pr->send_cq);
1649         ehea_destroy_cq(pr->recv_cq);
1650         ehea_destroy_eq(pr->eq);
1651 out:
1652         return ret;
1653 }
1654
1655 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1656 {
1657         int ret, i;
1658
1659         if (pr->qp)
1660                 netif_napi_del(&pr->napi);
1661
1662         ret = ehea_destroy_qp(pr->qp);
1663
1664         if (!ret) {
1665                 ehea_destroy_cq(pr->send_cq);
1666                 ehea_destroy_cq(pr->recv_cq);
1667                 ehea_destroy_eq(pr->eq);
1668
1669                 for (i = 0; i < pr->rq1_skba.len; i++)
1670                         if (pr->rq1_skba.arr[i])
1671                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1672
1673                 for (i = 0; i < pr->rq2_skba.len; i++)
1674                         if (pr->rq2_skba.arr[i])
1675                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1676
1677                 for (i = 0; i < pr->rq3_skba.len; i++)
1678                         if (pr->rq3_skba.arr[i])
1679                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1680
1681                 for (i = 0; i < pr->sq_skba.len; i++)
1682                         if (pr->sq_skba.arr[i])
1683                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1684
1685                 vfree(pr->rq1_skba.arr);
1686                 vfree(pr->rq2_skba.arr);
1687                 vfree(pr->rq3_skba.arr);
1688                 vfree(pr->sq_skba.arr);
1689                 ret = ehea_rem_smrs(pr);
1690         }
1691         return ret;
1692 }
1693
1694 /*
1695  * The write_* functions store information in swqe which is used by
1696  * the hardware to calculate the ip/tcp/udp checksum
1697  */
1698
1699 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1700                                       const struct sk_buff *skb)
1701 {
1702         swqe->ip_start = skb_network_offset(skb);
1703         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1704 }
1705
1706 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1707                                         const struct sk_buff *skb)
1708 {
1709         swqe->tcp_offset =
1710                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1711
1712         swqe->tcp_end = (u16)skb->len - 1;
1713 }
1714
1715 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1716                                         const struct sk_buff *skb)
1717 {
1718         swqe->tcp_offset =
1719                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1720
1721         swqe->tcp_end = (u16)skb->len - 1;
1722 }
1723
1724
1725 static void write_swqe2_TSO(struct sk_buff *skb,
1726                             struct ehea_swqe *swqe, u32 lkey)
1727 {
1728         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1729         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1730         int skb_data_size = skb_headlen(skb);
1731         int headersize;
1732
1733         /* Packet is TCP with TSO enabled */
1734         swqe->tx_control |= EHEA_SWQE_TSO;
1735         swqe->mss = skb_shinfo(skb)->gso_size;
1736         /* copy only eth/ip/tcp headers to immediate data and
1737          * the rest of skb->data to sg1entry
1738          */
1739         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1740
1741         skb_data_size = skb_headlen(skb);
1742
1743         if (skb_data_size >= headersize) {
1744                 /* copy immediate data */
1745                 skb_copy_from_linear_data(skb, imm_data, headersize);
1746                 swqe->immediate_data_length = headersize;
1747
1748                 if (skb_data_size > headersize) {
1749                         /* set sg1entry data */
1750                         sg1entry->l_key = lkey;
1751                         sg1entry->len = skb_data_size - headersize;
1752                         sg1entry->vaddr =
1753                                 ehea_map_vaddr(skb->data + headersize);
1754                         swqe->descriptors++;
1755                 }
1756         } else
1757                 pr_err("cannot handle fragmented headers\n");
1758 }
1759
1760 static void write_swqe2_nonTSO(struct sk_buff *skb,
1761                                struct ehea_swqe *swqe, u32 lkey)
1762 {
1763         int skb_data_size = skb_headlen(skb);
1764         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1765         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1766
1767         /* Packet is any nonTSO type
1768          *
1769          * Copy as much as possible skb->data to immediate data and
1770          * the rest to sg1entry
1771          */
1772         if (skb_data_size >= SWQE2_MAX_IMM) {
1773                 /* copy immediate data */
1774                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1775
1776                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1777
1778                 if (skb_data_size > SWQE2_MAX_IMM) {
1779                         /* copy sg1entry data */
1780                         sg1entry->l_key = lkey;
1781                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1782                         sg1entry->vaddr =
1783                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1784                         swqe->descriptors++;
1785                 }
1786         } else {
1787                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1788                 swqe->immediate_data_length = skb_data_size;
1789         }
1790 }
1791
1792 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1793                                     struct ehea_swqe *swqe, u32 lkey)
1794 {
1795         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1796         skb_frag_t *frag;
1797         int nfrags, sg1entry_contains_frag_data, i;
1798
1799         nfrags = skb_shinfo(skb)->nr_frags;
1800         sg1entry = &swqe->u.immdata_desc.sg_entry;
1801         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1802         swqe->descriptors = 0;
1803         sg1entry_contains_frag_data = 0;
1804
1805         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1806                 write_swqe2_TSO(skb, swqe, lkey);
1807         else
1808                 write_swqe2_nonTSO(skb, swqe, lkey);
1809
1810         /* write descriptors */
1811         if (nfrags > 0) {
1812                 if (swqe->descriptors == 0) {
1813                         /* sg1entry not yet used */
1814                         frag = &skb_shinfo(skb)->frags[0];
1815
1816                         /* copy sg1entry data */
1817                         sg1entry->l_key = lkey;
1818                         sg1entry->len = frag->size;
1819                         sg1entry->vaddr =
1820                                 ehea_map_vaddr(skb_frag_address(frag));
1821                         swqe->descriptors++;
1822                         sg1entry_contains_frag_data = 1;
1823                 }
1824
1825                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1826
1827                         frag = &skb_shinfo(skb)->frags[i];
1828                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1829
1830                         sgentry->l_key = lkey;
1831                         sgentry->len = frag->size;
1832                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1833                         swqe->descriptors++;
1834                 }
1835         }
1836 }
1837
1838 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1839 {
1840         int ret = 0;
1841         u64 hret;
1842         u8 reg_type;
1843
1844         /* De/Register untagged packets */
1845         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1846         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1847                                      port->logical_port_id,
1848                                      reg_type, port->mac_addr, 0, hcallid);
1849         if (hret != H_SUCCESS) {
1850                 pr_err("%sregistering bc address failed (tagged)\n",
1851                        hcallid == H_REG_BCMC ? "" : "de");
1852                 ret = -EIO;
1853                 goto out_herr;
1854         }
1855
1856         /* De/Register VLAN packets */
1857         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1858         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1859                                      port->logical_port_id,
1860                                      reg_type, port->mac_addr, 0, hcallid);
1861         if (hret != H_SUCCESS) {
1862                 pr_err("%sregistering bc address failed (vlan)\n",
1863                        hcallid == H_REG_BCMC ? "" : "de");
1864                 ret = -EIO;
1865         }
1866 out_herr:
1867         return ret;
1868 }
1869
1870 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1871 {
1872         struct ehea_port *port = netdev_priv(dev);
1873         struct sockaddr *mac_addr = sa;
1874         struct hcp_ehea_port_cb0 *cb0;
1875         int ret;
1876         u64 hret;
1877
1878         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1879                 ret = -EADDRNOTAVAIL;
1880                 goto out;
1881         }
1882
1883         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1884         if (!cb0) {
1885                 pr_err("no mem for cb0\n");
1886                 ret = -ENOMEM;
1887                 goto out;
1888         }
1889
1890         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1891
1892         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1893
1894         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1895                                        port->logical_port_id, H_PORT_CB0,
1896                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1897         if (hret != H_SUCCESS) {
1898                 ret = -EIO;
1899                 goto out_free;
1900         }
1901
1902         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1903
1904         /* Deregister old MAC in pHYP */
1905         if (port->state == EHEA_PORT_UP) {
1906                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1907                 if (ret)
1908                         goto out_upregs;
1909         }
1910
1911         port->mac_addr = cb0->port_mac_addr << 16;
1912
1913         /* Register new MAC in pHYP */
1914         if (port->state == EHEA_PORT_UP) {
1915                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1916                 if (ret)
1917                         goto out_upregs;
1918         }
1919
1920         ret = 0;
1921
1922 out_upregs:
1923         ehea_update_bcmc_registrations();
1924 out_free:
1925         free_page((unsigned long)cb0);
1926 out:
1927         return ret;
1928 }
1929
1930 static void ehea_promiscuous_error(u64 hret, int enable)
1931 {
1932         if (hret == H_AUTHORITY)
1933                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1934                         enable == 1 ? "en" : "dis");
1935         else
1936                 pr_err("failed %sabling promiscuous mode\n",
1937                        enable == 1 ? "en" : "dis");
1938 }
1939
1940 static void ehea_promiscuous(struct net_device *dev, int enable)
1941 {
1942         struct ehea_port *port = netdev_priv(dev);
1943         struct hcp_ehea_port_cb7 *cb7;
1944         u64 hret;
1945
1946         if (enable == port->promisc)
1947                 return;
1948
1949         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1950         if (!cb7) {
1951                 pr_err("no mem for cb7\n");
1952                 goto out;
1953         }
1954
1955         /* Modify Pxs_DUCQPN in CB7 */
1956         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1957
1958         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1959                                        port->logical_port_id,
1960                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1961         if (hret) {
1962                 ehea_promiscuous_error(hret, enable);
1963                 goto out;
1964         }
1965
1966         port->promisc = enable;
1967 out:
1968         free_page((unsigned long)cb7);
1969 }
1970
1971 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1972                                      u32 hcallid)
1973 {
1974         u64 hret;
1975         u8 reg_type;
1976
1977         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1978                  | EHEA_BCMC_UNTAGGED;
1979
1980         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1981                                      port->logical_port_id,
1982                                      reg_type, mc_mac_addr, 0, hcallid);
1983         if (hret)
1984                 goto out;
1985
1986         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1987                  | EHEA_BCMC_VLANID_ALL;
1988
1989         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1990                                      port->logical_port_id,
1991                                      reg_type, mc_mac_addr, 0, hcallid);
1992 out:
1993         return hret;
1994 }
1995
1996 static int ehea_drop_multicast_list(struct net_device *dev)
1997 {
1998         struct ehea_port *port = netdev_priv(dev);
1999         struct ehea_mc_list *mc_entry = port->mc_list;
2000         struct list_head *pos;
2001         struct list_head *temp;
2002         int ret = 0;
2003         u64 hret;
2004
2005         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2006                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2007
2008                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2009                                                  H_DEREG_BCMC);
2010                 if (hret) {
2011                         pr_err("failed deregistering mcast MAC\n");
2012                         ret = -EIO;
2013                 }
2014
2015                 list_del(pos);
2016                 kfree(mc_entry);
2017         }
2018         return ret;
2019 }
2020
2021 static void ehea_allmulti(struct net_device *dev, int enable)
2022 {
2023         struct ehea_port *port = netdev_priv(dev);
2024         u64 hret;
2025
2026         if (!port->allmulti) {
2027                 if (enable) {
2028                         /* Enable ALLMULTI */
2029                         ehea_drop_multicast_list(dev);
2030                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2031                         if (!hret)
2032                                 port->allmulti = 1;
2033                         else
2034                                 netdev_err(dev,
2035                                            "failed enabling IFF_ALLMULTI\n");
2036                 }
2037         } else
2038                 if (!enable) {
2039                         /* Disable ALLMULTI */
2040                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2041                         if (!hret)
2042                                 port->allmulti = 0;
2043                         else
2044                                 netdev_err(dev,
2045                                            "failed disabling IFF_ALLMULTI\n");
2046                 }
2047 }
2048
2049 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2050 {
2051         struct ehea_mc_list *ehea_mcl_entry;
2052         u64 hret;
2053
2054         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2055         if (!ehea_mcl_entry) {
2056                 pr_err("no mem for mcl_entry\n");
2057                 return;
2058         }
2059
2060         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2061
2062         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2063
2064         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2065                                          H_REG_BCMC);
2066         if (!hret)
2067                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2068         else {
2069                 pr_err("failed registering mcast MAC\n");
2070                 kfree(ehea_mcl_entry);
2071         }
2072 }
2073
2074 static void ehea_set_multicast_list(struct net_device *dev)
2075 {
2076         struct ehea_port *port = netdev_priv(dev);
2077         struct netdev_hw_addr *ha;
2078         int ret;
2079
2080         if (port->promisc) {
2081                 ehea_promiscuous(dev, 1);
2082                 return;
2083         }
2084         ehea_promiscuous(dev, 0);
2085
2086         if (dev->flags & IFF_ALLMULTI) {
2087                 ehea_allmulti(dev, 1);
2088                 goto out;
2089         }
2090         ehea_allmulti(dev, 0);
2091
2092         if (!netdev_mc_empty(dev)) {
2093                 ret = ehea_drop_multicast_list(dev);
2094                 if (ret) {
2095                         /* Dropping the current multicast list failed.
2096                          * Enabling ALL_MULTI is the best we can do.
2097                          */
2098                         ehea_allmulti(dev, 1);
2099                 }
2100
2101                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2102                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2103                                 port->adapter->max_mc_mac);
2104                         goto out;
2105                 }
2106
2107                 netdev_for_each_mc_addr(ha, dev)
2108                         ehea_add_multicast_entry(port, ha->addr);
2109
2110         }
2111 out:
2112         ehea_update_bcmc_registrations();
2113 }
2114
2115 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2116 {
2117         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2118                 return -EINVAL;
2119         dev->mtu = new_mtu;
2120         return 0;
2121 }
2122
2123 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2124                        struct ehea_swqe *swqe, u32 lkey)
2125 {
2126         if (skb->protocol == htons(ETH_P_IP)) {
2127                 const struct iphdr *iph = ip_hdr(skb);
2128
2129                 /* IPv4 */
2130                 swqe->tx_control |= EHEA_SWQE_CRC
2131                                  | EHEA_SWQE_IP_CHECKSUM
2132                                  | EHEA_SWQE_TCP_CHECKSUM
2133                                  | EHEA_SWQE_IMM_DATA_PRESENT
2134                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2135
2136                 write_ip_start_end(swqe, skb);
2137
2138                 if (iph->protocol == IPPROTO_UDP) {
2139                         if ((iph->frag_off & IP_MF) ||
2140                             (iph->frag_off & IP_OFFSET))
2141                                 /* IP fragment, so don't change cs */
2142                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2143                         else
2144                                 write_udp_offset_end(swqe, skb);
2145                 } else if (iph->protocol == IPPROTO_TCP) {
2146                         write_tcp_offset_end(swqe, skb);
2147                 }
2148
2149                 /* icmp (big data) and ip segmentation packets (all other ip
2150                    packets) do not require any special handling */
2151
2152         } else {
2153                 /* Other Ethernet Protocol */
2154                 swqe->tx_control |= EHEA_SWQE_CRC
2155                                  | EHEA_SWQE_IMM_DATA_PRESENT
2156                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2157         }
2158
2159         write_swqe2_data(skb, dev, swqe, lkey);
2160 }
2161
2162 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2163                        struct ehea_swqe *swqe)
2164 {
2165         int nfrags = skb_shinfo(skb)->nr_frags;
2166         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2167         skb_frag_t *frag;
2168         int i;
2169
2170         if (skb->protocol == htons(ETH_P_IP)) {
2171                 const struct iphdr *iph = ip_hdr(skb);
2172
2173                 /* IPv4 */
2174                 write_ip_start_end(swqe, skb);
2175
2176                 if (iph->protocol == IPPROTO_TCP) {
2177                         swqe->tx_control |= EHEA_SWQE_CRC
2178                                          | EHEA_SWQE_IP_CHECKSUM
2179                                          | EHEA_SWQE_TCP_CHECKSUM
2180                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2181
2182                         write_tcp_offset_end(swqe, skb);
2183
2184                 } else if (iph->protocol == IPPROTO_UDP) {
2185                         if ((iph->frag_off & IP_MF) ||
2186                             (iph->frag_off & IP_OFFSET))
2187                                 /* IP fragment, so don't change cs */
2188                                 swqe->tx_control |= EHEA_SWQE_CRC
2189                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2190                         else {
2191                                 swqe->tx_control |= EHEA_SWQE_CRC
2192                                                  | EHEA_SWQE_IP_CHECKSUM
2193                                                  | EHEA_SWQE_TCP_CHECKSUM
2194                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2195
2196                                 write_udp_offset_end(swqe, skb);
2197                         }
2198                 } else {
2199                         /* icmp (big data) and
2200                            ip segmentation packets (all other ip packets) */
2201                         swqe->tx_control |= EHEA_SWQE_CRC
2202                                          | EHEA_SWQE_IP_CHECKSUM
2203                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2204                 }
2205         } else {
2206                 /* Other Ethernet Protocol */
2207                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2208         }
2209         /* copy (immediate) data */
2210         if (nfrags == 0) {
2211                 /* data is in a single piece */
2212                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2213         } else {
2214                 /* first copy data from the skb->data buffer ... */
2215                 skb_copy_from_linear_data(skb, imm_data,
2216                                           skb_headlen(skb));
2217                 imm_data += skb_headlen(skb);
2218
2219                 /* ... then copy data from the fragments */
2220                 for (i = 0; i < nfrags; i++) {
2221                         frag = &skb_shinfo(skb)->frags[i];
2222                         memcpy(imm_data, skb_frag_address(frag), frag->size);
2223                         imm_data += frag->size;
2224                 }
2225         }
2226         swqe->immediate_data_length = skb->len;
2227         dev_kfree_skb(skb);
2228 }
2229
2230 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2231 {
2232         struct tcphdr *tcp;
2233         u32 tmp;
2234
2235         if ((skb->protocol == htons(ETH_P_IP)) &&
2236             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2237                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2238                                         (ip_hdr(skb)->ihl * 4));
2239                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2240                 tmp += ip_hdr(skb)->daddr % 31;
2241                 return tmp % num_qps;
2242         } else
2243                 return 0;
2244 }
2245
2246 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2247 {
2248         struct ehea_port *port = netdev_priv(dev);
2249         struct ehea_swqe *swqe;
2250         unsigned long flags;
2251         u32 lkey;
2252         int swqe_index;
2253         struct ehea_port_res *pr;
2254
2255         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2256
2257         if (!spin_trylock(&pr->xmit_lock))
2258                 return NETDEV_TX_BUSY;
2259
2260         if (pr->queue_stopped) {
2261                 spin_unlock(&pr->xmit_lock);
2262                 return NETDEV_TX_BUSY;
2263         }
2264
2265         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2266         memset(swqe, 0, SWQE_HEADER_SIZE);
2267         atomic_dec(&pr->swqe_avail);
2268
2269         if (vlan_tx_tag_present(skb)) {
2270                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2271                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2272         }
2273
2274         pr->tx_packets++;
2275         pr->tx_bytes += skb->len;
2276
2277         if (skb->len <= SWQE3_MAX_IMM) {
2278                 u32 sig_iv = port->sig_comp_iv;
2279                 u32 swqe_num = pr->swqe_id_counter;
2280                 ehea_xmit3(skb, dev, swqe);
2281                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2282                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2283                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2284                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2285                                                       sig_iv);
2286                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2287                         pr->swqe_ll_count = 0;
2288                 } else
2289                         pr->swqe_ll_count += 1;
2290         } else {
2291                 swqe->wr_id =
2292                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2293                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2294                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2295                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2296                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2297
2298                 pr->sq_skba.index++;
2299                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2300
2301                 lkey = pr->send_mr.lkey;
2302                 ehea_xmit2(skb, dev, swqe, lkey);
2303                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2304         }
2305         pr->swqe_id_counter += 1;
2306
2307         netif_info(port, tx_queued, dev,
2308                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2309         if (netif_msg_tx_queued(port))
2310                 ehea_dump(swqe, 512, "swqe");
2311
2312         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2313                 netif_stop_queue(dev);
2314                 swqe->tx_control |= EHEA_SWQE_PURGE;
2315         }
2316
2317         ehea_post_swqe(pr->qp, swqe);
2318
2319         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2320                 spin_lock_irqsave(&pr->netif_queue, flags);
2321                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2322                         pr->p_stats.queue_stopped++;
2323                         netif_stop_queue(dev);
2324                         pr->queue_stopped = 1;
2325                 }
2326                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2327         }
2328         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2329         spin_unlock(&pr->xmit_lock);
2330
2331         return NETDEV_TX_OK;
2332 }
2333
2334 static void ehea_vlan_rx_add_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         return;
2365 }
2366
2367 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2368 {
2369         struct ehea_port *port = netdev_priv(dev);
2370         struct ehea_adapter *adapter = port->adapter;
2371         struct hcp_ehea_port_cb1 *cb1;
2372         int index;
2373         u64 hret;
2374
2375         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2376         if (!cb1) {
2377                 pr_err("no mem for cb1\n");
2378                 goto out;
2379         }
2380
2381         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2382                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2383         if (hret != H_SUCCESS) {
2384                 pr_err("query_ehea_port failed\n");
2385                 goto out;
2386         }
2387
2388         index = (vid / 64);
2389         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2390
2391         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2392                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2393         if (hret != H_SUCCESS)
2394                 pr_err("modify_ehea_port failed\n");
2395 out:
2396         free_page((unsigned long)cb1);
2397 }
2398
2399 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2400 {
2401         int ret = -EIO;
2402         u64 hret;
2403         u16 dummy16 = 0;
2404         u64 dummy64 = 0;
2405         struct hcp_modify_qp_cb0 *cb0;
2406
2407         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2408         if (!cb0) {
2409                 ret = -ENOMEM;
2410                 goto out;
2411         }
2412
2413         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2414                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2415         if (hret != H_SUCCESS) {
2416                 pr_err("query_ehea_qp failed (1)\n");
2417                 goto out;
2418         }
2419
2420         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2421         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2422                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2423                                      &dummy64, &dummy64, &dummy16, &dummy16);
2424         if (hret != H_SUCCESS) {
2425                 pr_err("modify_ehea_qp failed (1)\n");
2426                 goto out;
2427         }
2428
2429         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2430                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2431         if (hret != H_SUCCESS) {
2432                 pr_err("query_ehea_qp failed (2)\n");
2433                 goto out;
2434         }
2435
2436         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2437         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2438                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2439                                      &dummy64, &dummy64, &dummy16, &dummy16);
2440         if (hret != H_SUCCESS) {
2441                 pr_err("modify_ehea_qp failed (2)\n");
2442                 goto out;
2443         }
2444
2445         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2446                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2447         if (hret != H_SUCCESS) {
2448                 pr_err("query_ehea_qp failed (3)\n");
2449                 goto out;
2450         }
2451
2452         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2453         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2454                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2455                                      &dummy64, &dummy64, &dummy16, &dummy16);
2456         if (hret != H_SUCCESS) {
2457                 pr_err("modify_ehea_qp failed (3)\n");
2458                 goto out;
2459         }
2460
2461         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2462                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2463         if (hret != H_SUCCESS) {
2464                 pr_err("query_ehea_qp failed (4)\n");
2465                 goto out;
2466         }
2467
2468         ret = 0;
2469 out:
2470         free_page((unsigned long)cb0);
2471         return ret;
2472 }
2473
2474 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2475                                int add_tx_qps)
2476 {
2477         int ret, i;
2478         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2479         enum ehea_eq_type eq_type = EHEA_EQ;
2480
2481         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2482                                    EHEA_MAX_ENTRIES_EQ, 1);
2483         if (!port->qp_eq) {
2484                 ret = -EINVAL;
2485                 pr_err("ehea_create_eq failed (qp_eq)\n");
2486                 goto out_kill_eq;
2487         }
2488
2489         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2490         pr_cfg.max_entries_scq = sq_entries * 2;
2491         pr_cfg.max_entries_sq = sq_entries;
2492         pr_cfg.max_entries_rq1 = rq1_entries;
2493         pr_cfg.max_entries_rq2 = rq2_entries;
2494         pr_cfg.max_entries_rq3 = rq3_entries;
2495
2496         pr_cfg_small_rx.max_entries_rcq = 1;
2497         pr_cfg_small_rx.max_entries_scq = sq_entries;
2498         pr_cfg_small_rx.max_entries_sq = sq_entries;
2499         pr_cfg_small_rx.max_entries_rq1 = 1;
2500         pr_cfg_small_rx.max_entries_rq2 = 1;
2501         pr_cfg_small_rx.max_entries_rq3 = 1;
2502
2503         for (i = 0; i < def_qps; i++) {
2504                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2505                 if (ret)
2506                         goto out_clean_pr;
2507         }
2508         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2509                 ret = ehea_init_port_res(port, &port->port_res[i],
2510                                          &pr_cfg_small_rx, i);
2511                 if (ret)
2512                         goto out_clean_pr;
2513         }
2514
2515         return 0;
2516
2517 out_clean_pr:
2518         while (--i >= 0)
2519                 ehea_clean_portres(port, &port->port_res[i]);
2520
2521 out_kill_eq:
2522         ehea_destroy_eq(port->qp_eq);
2523         return ret;
2524 }
2525
2526 static int ehea_clean_all_portres(struct ehea_port *port)
2527 {
2528         int ret = 0;
2529         int i;
2530
2531         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2532                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2533
2534         ret |= ehea_destroy_eq(port->qp_eq);
2535
2536         return ret;
2537 }
2538
2539 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2540 {
2541         if (adapter->active_ports)
2542                 return;
2543
2544         ehea_rem_mr(&adapter->mr);
2545 }
2546
2547 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2548 {
2549         if (adapter->active_ports)
2550                 return 0;
2551
2552         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2553 }
2554
2555 static int ehea_up(struct net_device *dev)
2556 {
2557         int ret, i;
2558         struct ehea_port *port = netdev_priv(dev);
2559
2560         if (port->state == EHEA_PORT_UP)
2561                 return 0;
2562
2563         ret = ehea_port_res_setup(port, port->num_def_qps,
2564                                   port->num_add_tx_qps);
2565         if (ret) {
2566                 netdev_err(dev, "port_res_failed\n");
2567                 goto out;
2568         }
2569
2570         /* Set default QP for this port */
2571         ret = ehea_configure_port(port);
2572         if (ret) {
2573                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2574                 goto out_clean_pr;
2575         }
2576
2577         ret = ehea_reg_interrupts(dev);
2578         if (ret) {
2579                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2580                 goto out_clean_pr;
2581         }
2582
2583         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2584                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2585                 if (ret) {
2586                         netdev_err(dev, "activate_qp failed\n");
2587                         goto out_free_irqs;
2588                 }
2589         }
2590
2591         for (i = 0; i < port->num_def_qps; i++) {
2592                 ret = ehea_fill_port_res(&port->port_res[i]);
2593                 if (ret) {
2594                         netdev_err(dev, "out_free_irqs\n");
2595                         goto out_free_irqs;
2596                 }
2597         }
2598
2599         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2600         if (ret) {
2601                 ret = -EIO;
2602                 goto out_free_irqs;
2603         }
2604
2605         port->state = EHEA_PORT_UP;
2606
2607         ret = 0;
2608         goto out;
2609
2610 out_free_irqs:
2611         ehea_free_interrupts(dev);
2612
2613 out_clean_pr:
2614         ehea_clean_all_portres(port);
2615 out:
2616         if (ret)
2617                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2618
2619         ehea_update_bcmc_registrations();
2620         ehea_update_firmware_handles();
2621
2622         return ret;
2623 }
2624
2625 static void port_napi_disable(struct ehea_port *port)
2626 {
2627         int i;
2628
2629         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2630                 napi_disable(&port->port_res[i].napi);
2631 }
2632
2633 static void port_napi_enable(struct ehea_port *port)
2634 {
2635         int i;
2636
2637         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2638                 napi_enable(&port->port_res[i].napi);
2639 }
2640
2641 static int ehea_open(struct net_device *dev)
2642 {
2643         int ret;
2644         struct ehea_port *port = netdev_priv(dev);
2645
2646         mutex_lock(&port->port_lock);
2647
2648         netif_info(port, ifup, dev, "enabling port\n");
2649
2650         ret = ehea_up(dev);
2651         if (!ret) {
2652                 port_napi_enable(port);
2653                 netif_start_queue(dev);
2654         }
2655
2656         mutex_unlock(&port->port_lock);
2657         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2658
2659         return ret;
2660 }
2661
2662 static int ehea_down(struct net_device *dev)
2663 {
2664         int ret;
2665         struct ehea_port *port = netdev_priv(dev);
2666
2667         if (port->state == EHEA_PORT_DOWN)
2668                 return 0;
2669
2670         ehea_drop_multicast_list(dev);
2671         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2672
2673         ehea_free_interrupts(dev);
2674
2675         port->state = EHEA_PORT_DOWN;
2676
2677         ehea_update_bcmc_registrations();
2678
2679         ret = ehea_clean_all_portres(port);
2680         if (ret)
2681                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2682
2683         ehea_update_firmware_handles();
2684
2685         return ret;
2686 }
2687
2688 static int ehea_stop(struct net_device *dev)
2689 {
2690         int ret;
2691         struct ehea_port *port = netdev_priv(dev);
2692
2693         netif_info(port, ifdown, dev, "disabling port\n");
2694
2695         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2696         cancel_work_sync(&port->reset_task);
2697         cancel_delayed_work_sync(&port->stats_work);
2698         mutex_lock(&port->port_lock);
2699         netif_stop_queue(dev);
2700         port_napi_disable(port);
2701         ret = ehea_down(dev);
2702         mutex_unlock(&port->port_lock);
2703         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2704         return ret;
2705 }
2706
2707 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2708 {
2709         struct ehea_qp qp = *orig_qp;
2710         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2711         struct ehea_swqe *swqe;
2712         int wqe_index;
2713         int i;
2714
2715         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2716                 swqe = ehea_get_swqe(&qp, &wqe_index);
2717                 swqe->tx_control |= EHEA_SWQE_PURGE;
2718         }
2719 }
2720
2721 static void ehea_flush_sq(struct ehea_port *port)
2722 {
2723         int i;
2724
2725         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2726                 struct ehea_port_res *pr = &port->port_res[i];
2727                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2728                 int ret;
2729
2730                 ret = wait_event_timeout(port->swqe_avail_wq,
2731                          atomic_read(&pr->swqe_avail) >= swqe_max,
2732                          msecs_to_jiffies(100));
2733
2734                 if (!ret) {
2735                         pr_err("WARNING: sq not flushed completely\n");
2736                         break;
2737                 }
2738         }
2739 }
2740
2741 int ehea_stop_qps(struct net_device *dev)
2742 {
2743         struct ehea_port *port = netdev_priv(dev);
2744         struct ehea_adapter *adapter = port->adapter;
2745         struct hcp_modify_qp_cb0 *cb0;
2746         int ret = -EIO;
2747         int dret;
2748         int i;
2749         u64 hret;
2750         u64 dummy64 = 0;
2751         u16 dummy16 = 0;
2752
2753         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2754         if (!cb0) {
2755                 ret = -ENOMEM;
2756                 goto out;
2757         }
2758
2759         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2760                 struct ehea_port_res *pr =  &port->port_res[i];
2761                 struct ehea_qp *qp = pr->qp;
2762
2763                 /* Purge send queue */
2764                 ehea_purge_sq(qp);
2765
2766                 /* Disable queue pair */
2767                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2768                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2769                                             cb0);
2770                 if (hret != H_SUCCESS) {
2771                         pr_err("query_ehea_qp failed (1)\n");
2772                         goto out;
2773                 }
2774
2775                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2776                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2777
2778                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2779                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2780                                                             1), cb0, &dummy64,
2781                                              &dummy64, &dummy16, &dummy16);
2782                 if (hret != H_SUCCESS) {
2783                         pr_err("modify_ehea_qp failed (1)\n");
2784                         goto out;
2785                 }
2786
2787                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2788                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2789                                             cb0);
2790                 if (hret != H_SUCCESS) {
2791                         pr_err("query_ehea_qp failed (2)\n");
2792                         goto out;
2793                 }
2794
2795                 /* deregister shared memory regions */
2796                 dret = ehea_rem_smrs(pr);
2797                 if (dret) {
2798                         pr_err("unreg shared memory region failed\n");
2799                         goto out;
2800                 }
2801         }
2802
2803         ret = 0;
2804 out:
2805         free_page((unsigned long)cb0);
2806
2807         return ret;
2808 }
2809
2810 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2811 {
2812         struct ehea_qp qp = *orig_qp;
2813         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2814         struct ehea_rwqe *rwqe;
2815         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2816         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2817         struct sk_buff *skb;
2818         u32 lkey = pr->recv_mr.lkey;
2819
2820
2821         int i;
2822         int index;
2823
2824         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2825                 rwqe = ehea_get_next_rwqe(&qp, 2);
2826                 rwqe->sg_list[0].l_key = lkey;
2827                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2828                 skb = skba_rq2[index];
2829                 if (skb)
2830                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2831         }
2832
2833         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2834                 rwqe = ehea_get_next_rwqe(&qp, 3);
2835                 rwqe->sg_list[0].l_key = lkey;
2836                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2837                 skb = skba_rq3[index];
2838                 if (skb)
2839                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2840         }
2841 }
2842
2843 int ehea_restart_qps(struct net_device *dev)
2844 {
2845         struct ehea_port *port = netdev_priv(dev);
2846         struct ehea_adapter *adapter = port->adapter;
2847         int ret = 0;
2848         int i;
2849
2850         struct hcp_modify_qp_cb0 *cb0;
2851         u64 hret;
2852         u64 dummy64 = 0;
2853         u16 dummy16 = 0;
2854
2855         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2856         if (!cb0) {
2857                 ret = -ENOMEM;
2858                 goto out;
2859         }
2860
2861         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2862                 struct ehea_port_res *pr =  &port->port_res[i];
2863                 struct ehea_qp *qp = pr->qp;
2864
2865                 ret = ehea_gen_smrs(pr);
2866                 if (ret) {
2867                         netdev_err(dev, "creation of shared memory regions failed\n");
2868                         goto out;
2869                 }
2870
2871                 ehea_update_rqs(qp, pr);
2872
2873                 /* Enable queue pair */
2874                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2875                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2876                                             cb0);
2877                 if (hret != H_SUCCESS) {
2878                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2879                         goto out;
2880                 }
2881
2882                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2883                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2884
2885                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2886                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2887                                                             1), cb0, &dummy64,
2888                                              &dummy64, &dummy16, &dummy16);
2889                 if (hret != H_SUCCESS) {
2890                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2891                         goto out;
2892                 }
2893
2894                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2895                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2896                                             cb0);
2897                 if (hret != H_SUCCESS) {
2898                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2899                         goto out;
2900                 }
2901
2902                 /* refill entire queue */
2903                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2904                 ehea_refill_rq2(pr, 0);
2905                 ehea_refill_rq3(pr, 0);
2906         }
2907 out:
2908         free_page((unsigned long)cb0);
2909
2910         return ret;
2911 }
2912
2913 static void ehea_reset_port(struct work_struct *work)
2914 {
2915         int ret;
2916         struct ehea_port *port =
2917                 container_of(work, struct ehea_port, reset_task);
2918         struct net_device *dev = port->netdev;
2919
2920         mutex_lock(&dlpar_mem_lock);
2921         port->resets++;
2922         mutex_lock(&port->port_lock);
2923         netif_stop_queue(dev);
2924
2925         port_napi_disable(port);
2926
2927         ehea_down(dev);
2928
2929         ret = ehea_up(dev);
2930         if (ret)
2931                 goto out;
2932
2933         ehea_set_multicast_list(dev);
2934
2935         netif_info(port, timer, dev, "reset successful\n");
2936
2937         port_napi_enable(port);
2938
2939         netif_wake_queue(dev);
2940 out:
2941         mutex_unlock(&port->port_lock);
2942         mutex_unlock(&dlpar_mem_lock);
2943 }
2944
2945 static void ehea_rereg_mrs(void)
2946 {
2947         int ret, i;
2948         struct ehea_adapter *adapter;
2949
2950         pr_info("LPAR memory changed - re-initializing driver\n");
2951
2952         list_for_each_entry(adapter, &adapter_list, list)
2953                 if (adapter->active_ports) {
2954                         /* Shutdown all ports */
2955                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2956                                 struct ehea_port *port = adapter->port[i];
2957                                 struct net_device *dev;
2958
2959                                 if (!port)
2960                                         continue;
2961
2962                                 dev = port->netdev;
2963
2964                                 if (dev->flags & IFF_UP) {
2965                                         mutex_lock(&port->port_lock);
2966                                         netif_stop_queue(dev);
2967                                         ehea_flush_sq(port);
2968                                         ret = ehea_stop_qps(dev);
2969                                         if (ret) {
2970                                                 mutex_unlock(&port->port_lock);
2971                                                 goto out;
2972                                         }
2973                                         port_napi_disable(port);
2974                                         mutex_unlock(&port->port_lock);
2975                                 }
2976                                 reset_sq_restart_flag(port);
2977                         }
2978
2979                         /* Unregister old memory region */
2980                         ret = ehea_rem_mr(&adapter->mr);
2981                         if (ret) {
2982                                 pr_err("unregister MR failed - driver inoperable!\n");
2983                                 goto out;
2984                         }
2985                 }
2986
2987         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2988
2989         list_for_each_entry(adapter, &adapter_list, list)
2990                 if (adapter->active_ports) {
2991                         /* Register new memory region */
2992                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2993                         if (ret) {
2994                                 pr_err("register MR failed - driver inoperable!\n");
2995                                 goto out;
2996                         }
2997
2998                         /* Restart all ports */
2999                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3000                                 struct ehea_port *port = adapter->port[i];
3001
3002                                 if (port) {
3003                                         struct net_device *dev = port->netdev;
3004
3005                                         if (dev->flags & IFF_UP) {
3006                                                 mutex_lock(&port->port_lock);
3007                                                 ret = ehea_restart_qps(dev);
3008                                                 if (!ret) {
3009                                                         check_sqs(port);
3010                                                         port_napi_enable(port);
3011                                                         netif_wake_queue(dev);
3012                                                 } else {
3013                                                         netdev_err(dev, "Unable to restart QPS\n");
3014                                                 }
3015                                                 mutex_unlock(&port->port_lock);
3016                                         }
3017                                 }
3018                         }
3019                 }
3020         pr_info("re-initializing driver complete\n");
3021 out:
3022         return;
3023 }
3024
3025 static void ehea_tx_watchdog(struct net_device *dev)
3026 {
3027         struct ehea_port *port = netdev_priv(dev);
3028
3029         if (netif_carrier_ok(dev) &&
3030             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3031                 ehea_schedule_port_reset(port);
3032 }
3033
3034 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3035 {
3036         struct hcp_query_ehea *cb;
3037         u64 hret;
3038         int ret;
3039
3040         cb = (void *)get_zeroed_page(GFP_KERNEL);
3041         if (!cb) {
3042                 ret = -ENOMEM;
3043                 goto out;
3044         }
3045
3046         hret = ehea_h_query_ehea(adapter->handle, cb);
3047
3048         if (hret != H_SUCCESS) {
3049                 ret = -EIO;
3050                 goto out_herr;
3051         }
3052
3053         adapter->max_mc_mac = cb->max_mc_mac - 1;
3054         ret = 0;
3055
3056 out_herr:
3057         free_page((unsigned long)cb);
3058 out:
3059         return ret;
3060 }
3061
3062 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3063 {
3064         struct hcp_ehea_port_cb4 *cb4;
3065         u64 hret;
3066         int ret = 0;
3067
3068         *jumbo = 0;
3069
3070         /* (Try to) enable *jumbo frames */
3071         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3072         if (!cb4) {
3073                 pr_err("no mem for cb4\n");
3074                 ret = -ENOMEM;
3075                 goto out;
3076         } else {
3077                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3078                                               port->logical_port_id,
3079                                               H_PORT_CB4,
3080                                               H_PORT_CB4_JUMBO, cb4);
3081                 if (hret == H_SUCCESS) {
3082                         if (cb4->jumbo_frame)
3083                                 *jumbo = 1;
3084                         else {
3085                                 cb4->jumbo_frame = 1;
3086                                 hret = ehea_h_modify_ehea_port(port->adapter->
3087                                                                handle,
3088                                                                port->
3089                                                                logical_port_id,
3090                                                                H_PORT_CB4,
3091                                                                H_PORT_CB4_JUMBO,
3092                                                                cb4);
3093                                 if (hret == H_SUCCESS)
3094                                         *jumbo = 1;
3095                         }
3096                 } else
3097                         ret = -EINVAL;
3098
3099                 free_page((unsigned long)cb4);
3100         }
3101 out:
3102         return ret;
3103 }
3104
3105 static ssize_t ehea_show_port_id(struct device *dev,
3106                                  struct device_attribute *attr, char *buf)
3107 {
3108         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3109         return sprintf(buf, "%d", port->logical_port_id);
3110 }
3111
3112 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3113                    NULL);
3114
3115 static void __devinit logical_port_release(struct device *dev)
3116 {
3117         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3118         of_node_put(port->ofdev.dev.of_node);
3119 }
3120
3121 static struct device *ehea_register_port(struct ehea_port *port,
3122                                          struct device_node *dn)
3123 {
3124         int ret;
3125
3126         port->ofdev.dev.of_node = of_node_get(dn);
3127         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3128         port->ofdev.dev.bus = &ibmebus_bus_type;
3129
3130         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3131         port->ofdev.dev.release = logical_port_release;
3132
3133         ret = of_device_register(&port->ofdev);
3134         if (ret) {
3135                 pr_err("failed to register device. ret=%d\n", ret);
3136                 goto out;
3137         }
3138
3139         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3140         if (ret) {
3141                 pr_err("failed to register attributes, ret=%d\n", ret);
3142                 goto out_unreg_of_dev;
3143         }
3144
3145         return &port->ofdev.dev;
3146
3147 out_unreg_of_dev:
3148         of_device_unregister(&port->ofdev);
3149 out:
3150         return NULL;
3151 }
3152
3153 static void ehea_unregister_port(struct ehea_port *port)
3154 {
3155         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3156         of_device_unregister(&port->ofdev);
3157 }
3158
3159 static const struct net_device_ops ehea_netdev_ops = {
3160         .ndo_open               = ehea_open,
3161         .ndo_stop               = ehea_stop,
3162         .ndo_start_xmit         = ehea_start_xmit,
3163 #ifdef CONFIG_NET_POLL_CONTROLLER
3164         .ndo_poll_controller    = ehea_netpoll,
3165 #endif
3166         .ndo_get_stats          = ehea_get_stats,
3167         .ndo_set_mac_address    = ehea_set_mac_addr,
3168         .ndo_validate_addr      = eth_validate_addr,
3169         .ndo_set_rx_mode        = ehea_set_multicast_list,
3170         .ndo_change_mtu         = ehea_change_mtu,
3171         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3172         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3173         .ndo_tx_timeout         = ehea_tx_watchdog,
3174 };
3175
3176 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3177                                          u32 logical_port_id,
3178                                          struct device_node *dn)
3179 {
3180         int ret;
3181         struct net_device *dev;
3182         struct ehea_port *port;
3183         struct device *port_dev;
3184         int jumbo;
3185
3186         /* allocate memory for the port structures */
3187         dev = alloc_etherdev(sizeof(struct ehea_port));
3188
3189         if (!dev) {
3190                 pr_err("no mem for net_device\n");
3191                 ret = -ENOMEM;
3192                 goto out_err;
3193         }
3194
3195         port = netdev_priv(dev);
3196
3197         mutex_init(&port->port_lock);
3198         port->state = EHEA_PORT_DOWN;
3199         port->sig_comp_iv = sq_entries / 10;
3200
3201         port->adapter = adapter;
3202         port->netdev = dev;
3203         port->logical_port_id = logical_port_id;
3204
3205         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3206
3207         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3208         if (!port->mc_list) {
3209                 ret = -ENOMEM;
3210                 goto out_free_ethdev;
3211         }
3212
3213         INIT_LIST_HEAD(&port->mc_list->list);
3214
3215         ret = ehea_sense_port_attr(port);
3216         if (ret)
3217                 goto out_free_mc_list;
3218
3219         port_dev = ehea_register_port(port, dn);
3220         if (!port_dev)
3221                 goto out_free_mc_list;
3222
3223         SET_NETDEV_DEV(dev, port_dev);
3224
3225         /* initialize net_device structure */
3226         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3227
3228         dev->netdev_ops = &ehea_netdev_ops;
3229         ehea_set_ethtool_ops(dev);
3230
3231         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3232                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3233         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3234                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3235                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3236                       | NETIF_F_LLTX | NETIF_F_RXCSUM;
3237         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3238
3239         if (use_lro)
3240                 dev->features |= NETIF_F_LRO;
3241
3242         INIT_WORK(&port->reset_task, ehea_reset_port);
3243         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3244
3245         init_waitqueue_head(&port->swqe_avail_wq);
3246         init_waitqueue_head(&port->restart_wq);
3247
3248         memset(&port->stats, 0, sizeof(struct net_device_stats));
3249         ret = register_netdev(dev);
3250         if (ret) {
3251                 pr_err("register_netdev failed. ret=%d\n", ret);
3252                 goto out_unreg_port;
3253         }
3254
3255         port->lro_max_aggr = lro_max_aggr;
3256
3257         ret = ehea_get_jumboframe_status(port, &jumbo);
3258         if (ret)
3259                 netdev_err(dev, "failed determining jumbo frame status\n");
3260
3261         netdev_info(dev, "Jumbo frames are %sabled\n",
3262                     jumbo == 1 ? "en" : "dis");
3263
3264         adapter->active_ports++;
3265
3266         return port;
3267
3268 out_unreg_port:
3269         ehea_unregister_port(port);
3270
3271 out_free_mc_list:
3272         kfree(port->mc_list);
3273
3274 out_free_ethdev:
3275         free_netdev(dev);
3276
3277 out_err:
3278         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3279                logical_port_id, ret);
3280         return NULL;
3281 }
3282
3283 static void ehea_shutdown_single_port(struct ehea_port *port)
3284 {
3285         struct ehea_adapter *adapter = port->adapter;
3286
3287         cancel_work_sync(&port->reset_task);
3288         cancel_delayed_work_sync(&port->stats_work);
3289         unregister_netdev(port->netdev);
3290         ehea_unregister_port(port);
3291         kfree(port->mc_list);
3292         free_netdev(port->netdev);
3293         adapter->active_ports--;
3294 }
3295
3296 static int ehea_setup_ports(struct ehea_adapter *adapter)
3297 {
3298         struct device_node *lhea_dn;
3299         struct device_node *eth_dn = NULL;
3300
3301         const u32 *dn_log_port_id;
3302         int i = 0;
3303
3304         lhea_dn = adapter->ofdev->dev.of_node;
3305         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3306
3307                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3308                                                  NULL);
3309                 if (!dn_log_port_id) {
3310                         pr_err("bad device node: eth_dn name=%s\n",
3311                                eth_dn->full_name);
3312                         continue;
3313                 }
3314
3315                 if (ehea_add_adapter_mr(adapter)) {
3316                         pr_err("creating MR failed\n");
3317                         of_node_put(eth_dn);
3318                         return -EIO;
3319                 }
3320
3321                 adapter->port[i] = ehea_setup_single_port(adapter,
3322                                                           *dn_log_port_id,
3323                                                           eth_dn);
3324                 if (adapter->port[i])
3325                         netdev_info(adapter->port[i]->netdev,
3326                                     "logical port id #%d\n", *dn_log_port_id);
3327                 else
3328                         ehea_remove_adapter_mr(adapter);
3329
3330                 i++;
3331         }
3332         return 0;
3333 }
3334
3335 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3336                                            u32 logical_port_id)
3337 {
3338         struct device_node *lhea_dn;
3339         struct device_node *eth_dn = NULL;
3340         const u32 *dn_log_port_id;
3341
3342         lhea_dn = adapter->ofdev->dev.of_node;
3343         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3344
3345                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3346                                                  NULL);
3347                 if (dn_log_port_id)
3348                         if (*dn_log_port_id == logical_port_id)
3349                                 return eth_dn;
3350         }
3351
3352         return NULL;
3353 }
3354
3355 static ssize_t ehea_probe_port(struct device *dev,
3356                                struct device_attribute *attr,
3357                                const char *buf, size_t count)
3358 {
3359         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3360         struct ehea_port *port;
3361         struct device_node *eth_dn = NULL;
3362         int i;
3363
3364         u32 logical_port_id;
3365
3366         sscanf(buf, "%d", &logical_port_id);
3367
3368         port = ehea_get_port(adapter, logical_port_id);
3369
3370         if (port) {
3371                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3372                             logical_port_id);
3373                 return -EINVAL;
3374         }
3375
3376         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3377
3378         if (!eth_dn) {
3379                 pr_info("no logical port with id %d found\n", logical_port_id);
3380                 return -EINVAL;
3381         }
3382
3383         if (ehea_add_adapter_mr(adapter)) {
3384                 pr_err("creating MR failed\n");
3385                 return -EIO;
3386         }
3387
3388         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3389
3390         of_node_put(eth_dn);
3391
3392         if (port) {
3393                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3394                         if (!adapter->port[i]) {
3395                                 adapter->port[i] = port;
3396                                 break;
3397                         }
3398
3399                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3400                             logical_port_id);
3401         } else {
3402                 ehea_remove_adapter_mr(adapter);
3403                 return -EIO;
3404         }
3405
3406         return (ssize_t) count;
3407 }
3408
3409 static ssize_t ehea_remove_port(struct device *dev,
3410                                 struct device_attribute *attr,
3411                                 const char *buf, size_t count)
3412 {
3413         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3414         struct ehea_port *port;
3415         int i;
3416         u32 logical_port_id;
3417
3418         sscanf(buf, "%d", &logical_port_id);
3419
3420         port = ehea_get_port(adapter, logical_port_id);
3421
3422         if (port) {
3423                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3424                             logical_port_id);
3425
3426                 ehea_shutdown_single_port(port);
3427
3428                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3429                         if (adapter->port[i] == port) {
3430                                 adapter->port[i] = NULL;
3431                                 break;
3432                         }
3433         } else {
3434                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3435                        logical_port_id);
3436                 return -EINVAL;
3437         }
3438
3439         ehea_remove_adapter_mr(adapter);
3440
3441         return (ssize_t) count;
3442 }
3443
3444 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3445 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3446
3447 int ehea_create_device_sysfs(struct platform_device *dev)
3448 {
3449         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3450         if (ret)
3451                 goto out;
3452
3453         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3454 out:
3455         return ret;
3456 }
3457
3458 void ehea_remove_device_sysfs(struct platform_device *dev)
3459 {
3460         device_remove_file(&dev->dev, &dev_attr_probe_port);
3461         device_remove_file(&dev->dev, &dev_attr_remove_port);
3462 }
3463
3464 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3465                                         const struct of_device_id *id)
3466 {
3467         struct ehea_adapter *adapter;
3468         const u64 *adapter_handle;
3469         int ret;
3470
3471         if (!dev || !dev->dev.of_node) {
3472                 pr_err("Invalid ibmebus device probed\n");
3473                 return -EINVAL;
3474         }
3475
3476         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3477         if (!adapter) {
3478                 ret = -ENOMEM;
3479                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3480                 goto out;
3481         }
3482
3483         list_add(&adapter->list, &adapter_list);
3484
3485         adapter->ofdev = dev;
3486
3487         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3488                                          NULL);
3489         if (adapter_handle)
3490                 adapter->handle = *adapter_handle;
3491
3492         if (!adapter->handle) {
3493                 dev_err(&dev->dev, "failed getting handle for adapter"
3494                         " '%s'\n", dev->dev.of_node->full_name);
3495                 ret = -ENODEV;
3496                 goto out_free_ad;
3497         }
3498
3499         adapter->pd = EHEA_PD_ID;
3500
3501         dev_set_drvdata(&dev->dev, adapter);
3502
3503
3504         /* initialize adapter and ports */
3505         /* get adapter properties */
3506         ret = ehea_sense_adapter_attr(adapter);
3507         if (ret) {
3508                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3509                 goto out_free_ad;
3510         }
3511
3512         adapter->neq = ehea_create_eq(adapter,
3513                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3514         if (!adapter->neq) {
3515                 ret = -EIO;
3516                 dev_err(&dev->dev, "NEQ creation failed\n");
3517                 goto out_free_ad;
3518         }
3519
3520         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3521                      (unsigned long)adapter);
3522
3523         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3524                                   ehea_interrupt_neq, IRQF_DISABLED,
3525                                   "ehea_neq", adapter);
3526         if (ret) {
3527                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3528                 goto out_kill_eq;
3529         }
3530
3531         ret = ehea_create_device_sysfs(dev);
3532         if (ret)
3533                 goto out_free_irq;
3534
3535         ret = ehea_setup_ports(adapter);
3536         if (ret) {
3537                 dev_err(&dev->dev, "setup_ports failed\n");
3538                 goto out_rem_dev_sysfs;
3539         }
3540
3541         ret = 0;
3542         goto out;
3543
3544 out_rem_dev_sysfs:
3545         ehea_remove_device_sysfs(dev);
3546
3547 out_free_irq:
3548         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3549
3550 out_kill_eq:
3551         ehea_destroy_eq(adapter->neq);
3552
3553 out_free_ad:
3554         list_del(&adapter->list);
3555         kfree(adapter);
3556
3557 out:
3558         ehea_update_firmware_handles();
3559
3560         return ret;
3561 }
3562
3563 static int __devexit ehea_remove(struct platform_device *dev)
3564 {
3565         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3566         int i;
3567
3568         for (i = 0; i < EHEA_MAX_PORTS; i++)
3569                 if (adapter->port[i]) {
3570                         ehea_shutdown_single_port(adapter->port[i]);
3571                         adapter->port[i] = NULL;
3572                 }
3573
3574         ehea_remove_device_sysfs(dev);
3575
3576         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3577         tasklet_kill(&adapter->neq_tasklet);
3578
3579         ehea_destroy_eq(adapter->neq);
3580         ehea_remove_adapter_mr(adapter);
3581         list_del(&adapter->list);
3582         kfree(adapter);
3583
3584         ehea_update_firmware_handles();
3585
3586         return 0;
3587 }
3588
3589 void ehea_crash_handler(void)
3590 {
3591         int i;
3592
3593         if (ehea_fw_handles.arr)
3594                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3595                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3596                                              ehea_fw_handles.arr[i].fwh,
3597                                              FORCE_FREE);
3598
3599         if (ehea_bcmc_regs.arr)
3600                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3601                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3602                                               ehea_bcmc_regs.arr[i].port_id,
3603                                               ehea_bcmc_regs.arr[i].reg_type,
3604                                               ehea_bcmc_regs.arr[i].macaddr,
3605                                               0, H_DEREG_BCMC);
3606 }
3607
3608 static int ehea_mem_notifier(struct notifier_block *nb,
3609                              unsigned long action, void *data)
3610 {
3611         int ret = NOTIFY_BAD;
3612         struct memory_notify *arg = data;
3613
3614         mutex_lock(&dlpar_mem_lock);
3615
3616         switch (action) {
3617         case MEM_CANCEL_OFFLINE:
3618                 pr_info("memory offlining canceled");
3619                 /* Readd canceled memory block */
3620         case MEM_ONLINE:
3621                 pr_info("memory is going online");
3622                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3623                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3624                         goto out_unlock;
3625                 ehea_rereg_mrs();
3626                 break;
3627         case MEM_GOING_OFFLINE:
3628                 pr_info("memory is going offline");
3629                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3630                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3631                         goto out_unlock;
3632                 ehea_rereg_mrs();
3633                 break;
3634         default:
3635                 break;
3636         }
3637
3638         ehea_update_firmware_handles();
3639         ret = NOTIFY_OK;
3640
3641 out_unlock:
3642         mutex_unlock(&dlpar_mem_lock);
3643         return ret;
3644 }
3645
3646 static struct notifier_block ehea_mem_nb = {
3647         .notifier_call = ehea_mem_notifier,
3648 };
3649
3650 static int ehea_reboot_notifier(struct notifier_block *nb,
3651                                 unsigned long action, void *unused)
3652 {
3653         if (action == SYS_RESTART) {
3654                 pr_info("Reboot: freeing all eHEA resources\n");
3655                 ibmebus_unregister_driver(&ehea_driver);
3656         }
3657         return NOTIFY_DONE;
3658 }
3659
3660 static struct notifier_block ehea_reboot_nb = {
3661         .notifier_call = ehea_reboot_notifier,
3662 };
3663
3664 static int check_module_parm(void)
3665 {
3666         int ret = 0;
3667
3668         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3669             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3670                 pr_info("Bad parameter: rq1_entries\n");
3671                 ret = -EINVAL;
3672         }
3673         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3674             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3675                 pr_info("Bad parameter: rq2_entries\n");
3676                 ret = -EINVAL;
3677         }
3678         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3679             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3680                 pr_info("Bad parameter: rq3_entries\n");
3681                 ret = -EINVAL;
3682         }
3683         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3684             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3685                 pr_info("Bad parameter: sq_entries\n");
3686                 ret = -EINVAL;
3687         }
3688
3689         return ret;
3690 }
3691
3692 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3693                                       char *buf)
3694 {
3695         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3696 }
3697
3698 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3699                    ehea_show_capabilities, NULL);
3700
3701 int __init ehea_module_init(void)
3702 {
3703         int ret;
3704
3705         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3706
3707         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3708         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3709
3710         mutex_init(&ehea_fw_handles.lock);
3711         spin_lock_init(&ehea_bcmc_regs.lock);
3712
3713         ret = check_module_parm();
3714         if (ret)
3715                 goto out;
3716
3717         ret = ehea_create_busmap();
3718         if (ret)
3719                 goto out;
3720
3721         ret = register_reboot_notifier(&ehea_reboot_nb);
3722         if (ret)
3723                 pr_info("failed registering reboot notifier\n");
3724
3725         ret = register_memory_notifier(&ehea_mem_nb);
3726         if (ret)
3727                 pr_info("failed registering memory remove notifier\n");
3728
3729         ret = crash_shutdown_register(ehea_crash_handler);
3730         if (ret)
3731                 pr_info("failed registering crash handler\n");
3732
3733         ret = ibmebus_register_driver(&ehea_driver);
3734         if (ret) {
3735                 pr_err("failed registering eHEA device driver on ebus\n");
3736                 goto out2;
3737         }
3738
3739         ret = driver_create_file(&ehea_driver.driver,
3740                                  &driver_attr_capabilities);
3741         if (ret) {
3742                 pr_err("failed to register capabilities attribute, ret=%d\n",
3743                        ret);
3744                 goto out3;
3745         }
3746
3747         return ret;
3748
3749 out3:
3750         ibmebus_unregister_driver(&ehea_driver);
3751 out2:
3752         unregister_memory_notifier(&ehea_mem_nb);
3753         unregister_reboot_notifier(&ehea_reboot_nb);
3754         crash_shutdown_unregister(ehea_crash_handler);
3755 out:
3756         return ret;
3757 }
3758
3759 static void __exit ehea_module_exit(void)
3760 {
3761         int ret;
3762
3763         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3764         ibmebus_unregister_driver(&ehea_driver);
3765         unregister_reboot_notifier(&ehea_reboot_nb);
3766         ret = crash_shutdown_unregister(ehea_crash_handler);
3767         if (ret)
3768                 pr_info("failed unregistering crash handler\n");
3769         unregister_memory_notifier(&ehea_mem_nb);
3770         kfree(ehea_fw_handles.arr);
3771         kfree(ehea_bcmc_regs.arr);
3772         ehea_destroy_busmap();
3773 }
3774
3775 module_init(ehea_module_init);
3776 module_exit(ehea_module_exit);