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->netif_queue);
1538
1539         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1540         if (!pr->eq) {
1541                 pr_err("create_eq failed (eq)\n");
1542                 goto out_free;
1543         }
1544
1545         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1546                                      pr->eq->fw_handle,
1547                                      port->logical_port_id);
1548         if (!pr->recv_cq) {
1549                 pr_err("create_cq failed (cq_recv)\n");
1550                 goto out_free;
1551         }
1552
1553         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1554                                      pr->eq->fw_handle,
1555                                      port->logical_port_id);
1556         if (!pr->send_cq) {
1557                 pr_err("create_cq failed (cq_send)\n");
1558                 goto out_free;
1559         }
1560
1561         if (netif_msg_ifup(port))
1562                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1563                         pr->send_cq->attr.act_nr_of_cqes,
1564                         pr->recv_cq->attr.act_nr_of_cqes);
1565
1566         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1567         if (!init_attr) {
1568                 ret = -ENOMEM;
1569                 pr_err("no mem for ehea_qp_init_attr\n");
1570                 goto out_free;
1571         }
1572
1573         init_attr->low_lat_rq1 = 1;
1574         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1575         init_attr->rq_count = 3;
1576         init_attr->qp_token = queue_token;
1577         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1578         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1579         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1580         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1581         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1582         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1583         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1584         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1585         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1586         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1587         init_attr->port_nr = port->logical_port_id;
1588         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1589         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1590         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1591
1592         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1593         if (!pr->qp) {
1594                 pr_err("create_qp failed\n");
1595                 ret = -EIO;
1596                 goto out_free;
1597         }
1598
1599         if (netif_msg_ifup(port))
1600                 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",
1601                         init_attr->qp_nr,
1602                         init_attr->act_nr_send_wqes,
1603                         init_attr->act_nr_rwqes_rq1,
1604                         init_attr->act_nr_rwqes_rq2,
1605                         init_attr->act_nr_rwqes_rq3);
1606
1607         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1608
1609         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1610         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1611         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1612         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1613         if (ret)
1614                 goto out_free;
1615
1616         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1617         if (ehea_gen_smrs(pr) != 0) {
1618                 ret = -EIO;
1619                 goto out_free;
1620         }
1621
1622         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1623
1624         kfree(init_attr);
1625
1626         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1627
1628         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1629         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1630         pr->lro_mgr.lro_arr = pr->lro_desc;
1631         pr->lro_mgr.get_skb_header = get_skb_hdr;
1632         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1633         pr->lro_mgr.dev = port->netdev;
1634         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1635         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1636
1637         ret = 0;
1638         goto out;
1639
1640 out_free:
1641         kfree(init_attr);
1642         vfree(pr->sq_skba.arr);
1643         vfree(pr->rq1_skba.arr);
1644         vfree(pr->rq2_skba.arr);
1645         vfree(pr->rq3_skba.arr);
1646         ehea_destroy_qp(pr->qp);
1647         ehea_destroy_cq(pr->send_cq);
1648         ehea_destroy_cq(pr->recv_cq);
1649         ehea_destroy_eq(pr->eq);
1650 out:
1651         return ret;
1652 }
1653
1654 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1655 {
1656         int ret, i;
1657
1658         if (pr->qp)
1659                 netif_napi_del(&pr->napi);
1660
1661         ret = ehea_destroy_qp(pr->qp);
1662
1663         if (!ret) {
1664                 ehea_destroy_cq(pr->send_cq);
1665                 ehea_destroy_cq(pr->recv_cq);
1666                 ehea_destroy_eq(pr->eq);
1667
1668                 for (i = 0; i < pr->rq1_skba.len; i++)
1669                         if (pr->rq1_skba.arr[i])
1670                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1671
1672                 for (i = 0; i < pr->rq2_skba.len; i++)
1673                         if (pr->rq2_skba.arr[i])
1674                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1675
1676                 for (i = 0; i < pr->rq3_skba.len; i++)
1677                         if (pr->rq3_skba.arr[i])
1678                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1679
1680                 for (i = 0; i < pr->sq_skba.len; i++)
1681                         if (pr->sq_skba.arr[i])
1682                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1683
1684                 vfree(pr->rq1_skba.arr);
1685                 vfree(pr->rq2_skba.arr);
1686                 vfree(pr->rq3_skba.arr);
1687                 vfree(pr->sq_skba.arr);
1688                 ret = ehea_rem_smrs(pr);
1689         }
1690         return ret;
1691 }
1692
1693 /*
1694  * The write_* functions store information in swqe which is used by
1695  * the hardware to calculate the ip/tcp/udp checksum
1696  */
1697
1698 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1699                                       const struct sk_buff *skb)
1700 {
1701         swqe->ip_start = skb_network_offset(skb);
1702         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1703 }
1704
1705 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1706                                         const struct sk_buff *skb)
1707 {
1708         swqe->tcp_offset =
1709                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1710
1711         swqe->tcp_end = (u16)skb->len - 1;
1712 }
1713
1714 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1715                                         const struct sk_buff *skb)
1716 {
1717         swqe->tcp_offset =
1718                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1719
1720         swqe->tcp_end = (u16)skb->len - 1;
1721 }
1722
1723
1724 static void write_swqe2_TSO(struct sk_buff *skb,
1725                             struct ehea_swqe *swqe, u32 lkey)
1726 {
1727         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1728         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1729         int skb_data_size = skb_headlen(skb);
1730         int headersize;
1731
1732         /* Packet is TCP with TSO enabled */
1733         swqe->tx_control |= EHEA_SWQE_TSO;
1734         swqe->mss = skb_shinfo(skb)->gso_size;
1735         /* copy only eth/ip/tcp headers to immediate data and
1736          * the rest of skb->data to sg1entry
1737          */
1738         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1739
1740         skb_data_size = skb_headlen(skb);
1741
1742         if (skb_data_size >= headersize) {
1743                 /* copy immediate data */
1744                 skb_copy_from_linear_data(skb, imm_data, headersize);
1745                 swqe->immediate_data_length = headersize;
1746
1747                 if (skb_data_size > headersize) {
1748                         /* set sg1entry data */
1749                         sg1entry->l_key = lkey;
1750                         sg1entry->len = skb_data_size - headersize;
1751                         sg1entry->vaddr =
1752                                 ehea_map_vaddr(skb->data + headersize);
1753                         swqe->descriptors++;
1754                 }
1755         } else
1756                 pr_err("cannot handle fragmented headers\n");
1757 }
1758
1759 static void write_swqe2_nonTSO(struct sk_buff *skb,
1760                                struct ehea_swqe *swqe, u32 lkey)
1761 {
1762         int skb_data_size = skb_headlen(skb);
1763         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1764         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1765
1766         /* Packet is any nonTSO type
1767          *
1768          * Copy as much as possible skb->data to immediate data and
1769          * the rest to sg1entry
1770          */
1771         if (skb_data_size >= SWQE2_MAX_IMM) {
1772                 /* copy immediate data */
1773                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1774
1775                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1776
1777                 if (skb_data_size > SWQE2_MAX_IMM) {
1778                         /* copy sg1entry data */
1779                         sg1entry->l_key = lkey;
1780                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1781                         sg1entry->vaddr =
1782                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1783                         swqe->descriptors++;
1784                 }
1785         } else {
1786                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1787                 swqe->immediate_data_length = skb_data_size;
1788         }
1789 }
1790
1791 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1792                                     struct ehea_swqe *swqe, u32 lkey)
1793 {
1794         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1795         skb_frag_t *frag;
1796         int nfrags, sg1entry_contains_frag_data, i;
1797
1798         nfrags = skb_shinfo(skb)->nr_frags;
1799         sg1entry = &swqe->u.immdata_desc.sg_entry;
1800         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1801         swqe->descriptors = 0;
1802         sg1entry_contains_frag_data = 0;
1803
1804         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1805                 write_swqe2_TSO(skb, swqe, lkey);
1806         else
1807                 write_swqe2_nonTSO(skb, swqe, lkey);
1808
1809         /* write descriptors */
1810         if (nfrags > 0) {
1811                 if (swqe->descriptors == 0) {
1812                         /* sg1entry not yet used */
1813                         frag = &skb_shinfo(skb)->frags[0];
1814
1815                         /* copy sg1entry data */
1816                         sg1entry->l_key = lkey;
1817                         sg1entry->len = frag->size;
1818                         sg1entry->vaddr =
1819                                 ehea_map_vaddr(skb_frag_address(frag));
1820                         swqe->descriptors++;
1821                         sg1entry_contains_frag_data = 1;
1822                 }
1823
1824                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1825
1826                         frag = &skb_shinfo(skb)->frags[i];
1827                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1828
1829                         sgentry->l_key = lkey;
1830                         sgentry->len = frag->size;
1831                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1832                         swqe->descriptors++;
1833                 }
1834         }
1835 }
1836
1837 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1838 {
1839         int ret = 0;
1840         u64 hret;
1841         u8 reg_type;
1842
1843         /* De/Register untagged packets */
1844         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1845         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1846                                      port->logical_port_id,
1847                                      reg_type, port->mac_addr, 0, hcallid);
1848         if (hret != H_SUCCESS) {
1849                 pr_err("%sregistering bc address failed (tagged)\n",
1850                        hcallid == H_REG_BCMC ? "" : "de");
1851                 ret = -EIO;
1852                 goto out_herr;
1853         }
1854
1855         /* De/Register VLAN packets */
1856         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1857         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1858                                      port->logical_port_id,
1859                                      reg_type, port->mac_addr, 0, hcallid);
1860         if (hret != H_SUCCESS) {
1861                 pr_err("%sregistering bc address failed (vlan)\n",
1862                        hcallid == H_REG_BCMC ? "" : "de");
1863                 ret = -EIO;
1864         }
1865 out_herr:
1866         return ret;
1867 }
1868
1869 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1870 {
1871         struct ehea_port *port = netdev_priv(dev);
1872         struct sockaddr *mac_addr = sa;
1873         struct hcp_ehea_port_cb0 *cb0;
1874         int ret;
1875         u64 hret;
1876
1877         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1878                 ret = -EADDRNOTAVAIL;
1879                 goto out;
1880         }
1881
1882         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1883         if (!cb0) {
1884                 pr_err("no mem for cb0\n");
1885                 ret = -ENOMEM;
1886                 goto out;
1887         }
1888
1889         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1890
1891         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1892
1893         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1894                                        port->logical_port_id, H_PORT_CB0,
1895                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1896         if (hret != H_SUCCESS) {
1897                 ret = -EIO;
1898                 goto out_free;
1899         }
1900
1901         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1902
1903         /* Deregister old MAC in pHYP */
1904         if (port->state == EHEA_PORT_UP) {
1905                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1906                 if (ret)
1907                         goto out_upregs;
1908         }
1909
1910         port->mac_addr = cb0->port_mac_addr << 16;
1911
1912         /* Register new MAC in pHYP */
1913         if (port->state == EHEA_PORT_UP) {
1914                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1915                 if (ret)
1916                         goto out_upregs;
1917         }
1918
1919         ret = 0;
1920
1921 out_upregs:
1922         ehea_update_bcmc_registrations();
1923 out_free:
1924         free_page((unsigned long)cb0);
1925 out:
1926         return ret;
1927 }
1928
1929 static void ehea_promiscuous_error(u64 hret, int enable)
1930 {
1931         if (hret == H_AUTHORITY)
1932                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1933                         enable == 1 ? "en" : "dis");
1934         else
1935                 pr_err("failed %sabling promiscuous mode\n",
1936                        enable == 1 ? "en" : "dis");
1937 }
1938
1939 static void ehea_promiscuous(struct net_device *dev, int enable)
1940 {
1941         struct ehea_port *port = netdev_priv(dev);
1942         struct hcp_ehea_port_cb7 *cb7;
1943         u64 hret;
1944
1945         if (enable == port->promisc)
1946                 return;
1947
1948         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1949         if (!cb7) {
1950                 pr_err("no mem for cb7\n");
1951                 goto out;
1952         }
1953
1954         /* Modify Pxs_DUCQPN in CB7 */
1955         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1956
1957         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1958                                        port->logical_port_id,
1959                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1960         if (hret) {
1961                 ehea_promiscuous_error(hret, enable);
1962                 goto out;
1963         }
1964
1965         port->promisc = enable;
1966 out:
1967         free_page((unsigned long)cb7);
1968 }
1969
1970 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1971                                      u32 hcallid)
1972 {
1973         u64 hret;
1974         u8 reg_type;
1975
1976         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1977                  | EHEA_BCMC_UNTAGGED;
1978
1979         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1980                                      port->logical_port_id,
1981                                      reg_type, mc_mac_addr, 0, hcallid);
1982         if (hret)
1983                 goto out;
1984
1985         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1986                  | EHEA_BCMC_VLANID_ALL;
1987
1988         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1989                                      port->logical_port_id,
1990                                      reg_type, mc_mac_addr, 0, hcallid);
1991 out:
1992         return hret;
1993 }
1994
1995 static int ehea_drop_multicast_list(struct net_device *dev)
1996 {
1997         struct ehea_port *port = netdev_priv(dev);
1998         struct ehea_mc_list *mc_entry = port->mc_list;
1999         struct list_head *pos;
2000         struct list_head *temp;
2001         int ret = 0;
2002         u64 hret;
2003
2004         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2005                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2006
2007                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2008                                                  H_DEREG_BCMC);
2009                 if (hret) {
2010                         pr_err("failed deregistering mcast MAC\n");
2011                         ret = -EIO;
2012                 }
2013
2014                 list_del(pos);
2015                 kfree(mc_entry);
2016         }
2017         return ret;
2018 }
2019
2020 static void ehea_allmulti(struct net_device *dev, int enable)
2021 {
2022         struct ehea_port *port = netdev_priv(dev);
2023         u64 hret;
2024
2025         if (!port->allmulti) {
2026                 if (enable) {
2027                         /* Enable ALLMULTI */
2028                         ehea_drop_multicast_list(dev);
2029                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2030                         if (!hret)
2031                                 port->allmulti = 1;
2032                         else
2033                                 netdev_err(dev,
2034                                            "failed enabling IFF_ALLMULTI\n");
2035                 }
2036         } else
2037                 if (!enable) {
2038                         /* Disable ALLMULTI */
2039                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2040                         if (!hret)
2041                                 port->allmulti = 0;
2042                         else
2043                                 netdev_err(dev,
2044                                            "failed disabling IFF_ALLMULTI\n");
2045                 }
2046 }
2047
2048 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2049 {
2050         struct ehea_mc_list *ehea_mcl_entry;
2051         u64 hret;
2052
2053         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2054         if (!ehea_mcl_entry) {
2055                 pr_err("no mem for mcl_entry\n");
2056                 return;
2057         }
2058
2059         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2060
2061         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2062
2063         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2064                                          H_REG_BCMC);
2065         if (!hret)
2066                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2067         else {
2068                 pr_err("failed registering mcast MAC\n");
2069                 kfree(ehea_mcl_entry);
2070         }
2071 }
2072
2073 static void ehea_set_multicast_list(struct net_device *dev)
2074 {
2075         struct ehea_port *port = netdev_priv(dev);
2076         struct netdev_hw_addr *ha;
2077         int ret;
2078
2079         if (port->promisc) {
2080                 ehea_promiscuous(dev, 1);
2081                 return;
2082         }
2083         ehea_promiscuous(dev, 0);
2084
2085         if (dev->flags & IFF_ALLMULTI) {
2086                 ehea_allmulti(dev, 1);
2087                 goto out;
2088         }
2089         ehea_allmulti(dev, 0);
2090
2091         if (!netdev_mc_empty(dev)) {
2092                 ret = ehea_drop_multicast_list(dev);
2093                 if (ret) {
2094                         /* Dropping the current multicast list failed.
2095                          * Enabling ALL_MULTI is the best we can do.
2096                          */
2097                         ehea_allmulti(dev, 1);
2098                 }
2099
2100                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2101                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2102                                 port->adapter->max_mc_mac);
2103                         goto out;
2104                 }
2105
2106                 netdev_for_each_mc_addr(ha, dev)
2107                         ehea_add_multicast_entry(port, ha->addr);
2108
2109         }
2110 out:
2111         ehea_update_bcmc_registrations();
2112 }
2113
2114 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2115 {
2116         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2117                 return -EINVAL;
2118         dev->mtu = new_mtu;
2119         return 0;
2120 }
2121
2122 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2123                        struct ehea_swqe *swqe, u32 lkey)
2124 {
2125         if (skb->protocol == htons(ETH_P_IP)) {
2126                 const struct iphdr *iph = ip_hdr(skb);
2127
2128                 /* IPv4 */
2129                 swqe->tx_control |= EHEA_SWQE_CRC
2130                                  | EHEA_SWQE_IP_CHECKSUM
2131                                  | EHEA_SWQE_TCP_CHECKSUM
2132                                  | EHEA_SWQE_IMM_DATA_PRESENT
2133                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2134
2135                 write_ip_start_end(swqe, skb);
2136
2137                 if (iph->protocol == IPPROTO_UDP) {
2138                         if ((iph->frag_off & IP_MF) ||
2139                             (iph->frag_off & IP_OFFSET))
2140                                 /* IP fragment, so don't change cs */
2141                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2142                         else
2143                                 write_udp_offset_end(swqe, skb);
2144                 } else if (iph->protocol == IPPROTO_TCP) {
2145                         write_tcp_offset_end(swqe, skb);
2146                 }
2147
2148                 /* icmp (big data) and ip segmentation packets (all other ip
2149                    packets) do not require any special handling */
2150
2151         } else {
2152                 /* Other Ethernet Protocol */
2153                 swqe->tx_control |= EHEA_SWQE_CRC
2154                                  | EHEA_SWQE_IMM_DATA_PRESENT
2155                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2156         }
2157
2158         write_swqe2_data(skb, dev, swqe, lkey);
2159 }
2160
2161 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2162                        struct ehea_swqe *swqe)
2163 {
2164         int nfrags = skb_shinfo(skb)->nr_frags;
2165         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2166         skb_frag_t *frag;
2167         int i;
2168
2169         if (skb->protocol == htons(ETH_P_IP)) {
2170                 const struct iphdr *iph = ip_hdr(skb);
2171
2172                 /* IPv4 */
2173                 write_ip_start_end(swqe, skb);
2174
2175                 if (iph->protocol == IPPROTO_TCP) {
2176                         swqe->tx_control |= EHEA_SWQE_CRC
2177                                          | EHEA_SWQE_IP_CHECKSUM
2178                                          | EHEA_SWQE_TCP_CHECKSUM
2179                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2180
2181                         write_tcp_offset_end(swqe, skb);
2182
2183                 } else if (iph->protocol == IPPROTO_UDP) {
2184                         if ((iph->frag_off & IP_MF) ||
2185                             (iph->frag_off & IP_OFFSET))
2186                                 /* IP fragment, so don't change cs */
2187                                 swqe->tx_control |= EHEA_SWQE_CRC
2188                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2189                         else {
2190                                 swqe->tx_control |= EHEA_SWQE_CRC
2191                                                  | EHEA_SWQE_IP_CHECKSUM
2192                                                  | EHEA_SWQE_TCP_CHECKSUM
2193                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2194
2195                                 write_udp_offset_end(swqe, skb);
2196                         }
2197                 } else {
2198                         /* icmp (big data) and
2199                            ip segmentation packets (all other ip packets) */
2200                         swqe->tx_control |= EHEA_SWQE_CRC
2201                                          | EHEA_SWQE_IP_CHECKSUM
2202                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2203                 }
2204         } else {
2205                 /* Other Ethernet Protocol */
2206                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2207         }
2208         /* copy (immediate) data */
2209         if (nfrags == 0) {
2210                 /* data is in a single piece */
2211                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2212         } else {
2213                 /* first copy data from the skb->data buffer ... */
2214                 skb_copy_from_linear_data(skb, imm_data,
2215                                           skb_headlen(skb));
2216                 imm_data += skb_headlen(skb);
2217
2218                 /* ... then copy data from the fragments */
2219                 for (i = 0; i < nfrags; i++) {
2220                         frag = &skb_shinfo(skb)->frags[i];
2221                         memcpy(imm_data, skb_frag_address(frag), frag->size);
2222                         imm_data += frag->size;
2223                 }
2224         }
2225         swqe->immediate_data_length = skb->len;
2226         dev_kfree_skb(skb);
2227 }
2228
2229 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2230 {
2231         struct tcphdr *tcp;
2232         u32 tmp;
2233
2234         if ((skb->protocol == htons(ETH_P_IP)) &&
2235             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2236                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2237                                         (ip_hdr(skb)->ihl * 4));
2238                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2239                 tmp += ip_hdr(skb)->daddr % 31;
2240                 return tmp % num_qps;
2241         } else
2242                 return 0;
2243 }
2244
2245 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2246 {
2247         struct ehea_port *port = netdev_priv(dev);
2248         struct ehea_swqe *swqe;
2249         unsigned long flags;
2250         u32 lkey;
2251         int swqe_index;
2252         struct ehea_port_res *pr;
2253
2254         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2255
2256         if (pr->queue_stopped)
2257                 return NETDEV_TX_BUSY;
2258
2259         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2260         memset(swqe, 0, SWQE_HEADER_SIZE);
2261         atomic_dec(&pr->swqe_avail);
2262
2263         if (vlan_tx_tag_present(skb)) {
2264                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2265                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2266         }
2267
2268         pr->tx_packets++;
2269         pr->tx_bytes += skb->len;
2270
2271         if (skb->len <= SWQE3_MAX_IMM) {
2272                 u32 sig_iv = port->sig_comp_iv;
2273                 u32 swqe_num = pr->swqe_id_counter;
2274                 ehea_xmit3(skb, dev, swqe);
2275                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2276                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2277                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2278                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2279                                                       sig_iv);
2280                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2281                         pr->swqe_ll_count = 0;
2282                 } else
2283                         pr->swqe_ll_count += 1;
2284         } else {
2285                 swqe->wr_id =
2286                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2287                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2288                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2289                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2290                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2291
2292                 pr->sq_skba.index++;
2293                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2294
2295                 lkey = pr->send_mr.lkey;
2296                 ehea_xmit2(skb, dev, swqe, lkey);
2297                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2298         }
2299         pr->swqe_id_counter += 1;
2300
2301         netif_info(port, tx_queued, dev,
2302                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2303         if (netif_msg_tx_queued(port))
2304                 ehea_dump(swqe, 512, "swqe");
2305
2306         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2307                 netif_stop_queue(dev);
2308                 swqe->tx_control |= EHEA_SWQE_PURGE;
2309         }
2310
2311         ehea_post_swqe(pr->qp, swqe);
2312
2313         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2314                 spin_lock_irqsave(&pr->netif_queue, flags);
2315                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2316                         pr->p_stats.queue_stopped++;
2317                         netif_stop_queue(dev);
2318                         pr->queue_stopped = 1;
2319                 }
2320                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2321         }
2322
2323         return NETDEV_TX_OK;
2324 }
2325
2326 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2327 {
2328         struct ehea_port *port = netdev_priv(dev);
2329         struct ehea_adapter *adapter = port->adapter;
2330         struct hcp_ehea_port_cb1 *cb1;
2331         int index;
2332         u64 hret;
2333
2334         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2335         if (!cb1) {
2336                 pr_err("no mem for cb1\n");
2337                 goto out;
2338         }
2339
2340         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2341                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2342         if (hret != H_SUCCESS) {
2343                 pr_err("query_ehea_port failed\n");
2344                 goto out;
2345         }
2346
2347         index = (vid / 64);
2348         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2349
2350         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2351                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2352         if (hret != H_SUCCESS)
2353                 pr_err("modify_ehea_port failed\n");
2354 out:
2355         free_page((unsigned long)cb1);
2356         return;
2357 }
2358
2359 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2360 {
2361         struct ehea_port *port = netdev_priv(dev);
2362         struct ehea_adapter *adapter = port->adapter;
2363         struct hcp_ehea_port_cb1 *cb1;
2364         int index;
2365         u64 hret;
2366
2367         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2368         if (!cb1) {
2369                 pr_err("no mem for cb1\n");
2370                 goto out;
2371         }
2372
2373         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2374                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2375         if (hret != H_SUCCESS) {
2376                 pr_err("query_ehea_port failed\n");
2377                 goto out;
2378         }
2379
2380         index = (vid / 64);
2381         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2382
2383         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2384                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2385         if (hret != H_SUCCESS)
2386                 pr_err("modify_ehea_port failed\n");
2387 out:
2388         free_page((unsigned long)cb1);
2389 }
2390
2391 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2392 {
2393         int ret = -EIO;
2394         u64 hret;
2395         u16 dummy16 = 0;
2396         u64 dummy64 = 0;
2397         struct hcp_modify_qp_cb0 *cb0;
2398
2399         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2400         if (!cb0) {
2401                 ret = -ENOMEM;
2402                 goto out;
2403         }
2404
2405         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2406                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2407         if (hret != H_SUCCESS) {
2408                 pr_err("query_ehea_qp failed (1)\n");
2409                 goto out;
2410         }
2411
2412         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2413         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2414                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2415                                      &dummy64, &dummy64, &dummy16, &dummy16);
2416         if (hret != H_SUCCESS) {
2417                 pr_err("modify_ehea_qp failed (1)\n");
2418                 goto out;
2419         }
2420
2421         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2422                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2423         if (hret != H_SUCCESS) {
2424                 pr_err("query_ehea_qp failed (2)\n");
2425                 goto out;
2426         }
2427
2428         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2429         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2430                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2431                                      &dummy64, &dummy64, &dummy16, &dummy16);
2432         if (hret != H_SUCCESS) {
2433                 pr_err("modify_ehea_qp failed (2)\n");
2434                 goto out;
2435         }
2436
2437         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2438                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2439         if (hret != H_SUCCESS) {
2440                 pr_err("query_ehea_qp failed (3)\n");
2441                 goto out;
2442         }
2443
2444         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2445         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2446                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2447                                      &dummy64, &dummy64, &dummy16, &dummy16);
2448         if (hret != H_SUCCESS) {
2449                 pr_err("modify_ehea_qp failed (3)\n");
2450                 goto out;
2451         }
2452
2453         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2454                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2455         if (hret != H_SUCCESS) {
2456                 pr_err("query_ehea_qp failed (4)\n");
2457                 goto out;
2458         }
2459
2460         ret = 0;
2461 out:
2462         free_page((unsigned long)cb0);
2463         return ret;
2464 }
2465
2466 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2467                                int add_tx_qps)
2468 {
2469         int ret, i;
2470         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2471         enum ehea_eq_type eq_type = EHEA_EQ;
2472
2473         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2474                                    EHEA_MAX_ENTRIES_EQ, 1);
2475         if (!port->qp_eq) {
2476                 ret = -EINVAL;
2477                 pr_err("ehea_create_eq failed (qp_eq)\n");
2478                 goto out_kill_eq;
2479         }
2480
2481         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2482         pr_cfg.max_entries_scq = sq_entries * 2;
2483         pr_cfg.max_entries_sq = sq_entries;
2484         pr_cfg.max_entries_rq1 = rq1_entries;
2485         pr_cfg.max_entries_rq2 = rq2_entries;
2486         pr_cfg.max_entries_rq3 = rq3_entries;
2487
2488         pr_cfg_small_rx.max_entries_rcq = 1;
2489         pr_cfg_small_rx.max_entries_scq = sq_entries;
2490         pr_cfg_small_rx.max_entries_sq = sq_entries;
2491         pr_cfg_small_rx.max_entries_rq1 = 1;
2492         pr_cfg_small_rx.max_entries_rq2 = 1;
2493         pr_cfg_small_rx.max_entries_rq3 = 1;
2494
2495         for (i = 0; i < def_qps; i++) {
2496                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2497                 if (ret)
2498                         goto out_clean_pr;
2499         }
2500         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2501                 ret = ehea_init_port_res(port, &port->port_res[i],
2502                                          &pr_cfg_small_rx, i);
2503                 if (ret)
2504                         goto out_clean_pr;
2505         }
2506
2507         return 0;
2508
2509 out_clean_pr:
2510         while (--i >= 0)
2511                 ehea_clean_portres(port, &port->port_res[i]);
2512
2513 out_kill_eq:
2514         ehea_destroy_eq(port->qp_eq);
2515         return ret;
2516 }
2517
2518 static int ehea_clean_all_portres(struct ehea_port *port)
2519 {
2520         int ret = 0;
2521         int i;
2522
2523         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2524                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2525
2526         ret |= ehea_destroy_eq(port->qp_eq);
2527
2528         return ret;
2529 }
2530
2531 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2532 {
2533         if (adapter->active_ports)
2534                 return;
2535
2536         ehea_rem_mr(&adapter->mr);
2537 }
2538
2539 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2540 {
2541         if (adapter->active_ports)
2542                 return 0;
2543
2544         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2545 }
2546
2547 static int ehea_up(struct net_device *dev)
2548 {
2549         int ret, i;
2550         struct ehea_port *port = netdev_priv(dev);
2551
2552         if (port->state == EHEA_PORT_UP)
2553                 return 0;
2554
2555         ret = ehea_port_res_setup(port, port->num_def_qps,
2556                                   port->num_add_tx_qps);
2557         if (ret) {
2558                 netdev_err(dev, "port_res_failed\n");
2559                 goto out;
2560         }
2561
2562         /* Set default QP for this port */
2563         ret = ehea_configure_port(port);
2564         if (ret) {
2565                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2566                 goto out_clean_pr;
2567         }
2568
2569         ret = ehea_reg_interrupts(dev);
2570         if (ret) {
2571                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2572                 goto out_clean_pr;
2573         }
2574
2575         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2576                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2577                 if (ret) {
2578                         netdev_err(dev, "activate_qp failed\n");
2579                         goto out_free_irqs;
2580                 }
2581         }
2582
2583         for (i = 0; i < port->num_def_qps; i++) {
2584                 ret = ehea_fill_port_res(&port->port_res[i]);
2585                 if (ret) {
2586                         netdev_err(dev, "out_free_irqs\n");
2587                         goto out_free_irqs;
2588                 }
2589         }
2590
2591         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2592         if (ret) {
2593                 ret = -EIO;
2594                 goto out_free_irqs;
2595         }
2596
2597         port->state = EHEA_PORT_UP;
2598
2599         ret = 0;
2600         goto out;
2601
2602 out_free_irqs:
2603         ehea_free_interrupts(dev);
2604
2605 out_clean_pr:
2606         ehea_clean_all_portres(port);
2607 out:
2608         if (ret)
2609                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2610
2611         ehea_update_bcmc_registrations();
2612         ehea_update_firmware_handles();
2613
2614         return ret;
2615 }
2616
2617 static void port_napi_disable(struct ehea_port *port)
2618 {
2619         int i;
2620
2621         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2622                 napi_disable(&port->port_res[i].napi);
2623 }
2624
2625 static void port_napi_enable(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_enable(&port->port_res[i].napi);
2631 }
2632
2633 static int ehea_open(struct net_device *dev)
2634 {
2635         int ret;
2636         struct ehea_port *port = netdev_priv(dev);
2637
2638         mutex_lock(&port->port_lock);
2639
2640         netif_info(port, ifup, dev, "enabling port\n");
2641
2642         ret = ehea_up(dev);
2643         if (!ret) {
2644                 port_napi_enable(port);
2645                 netif_start_queue(dev);
2646         }
2647
2648         mutex_unlock(&port->port_lock);
2649         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2650
2651         return ret;
2652 }
2653
2654 static int ehea_down(struct net_device *dev)
2655 {
2656         int ret;
2657         struct ehea_port *port = netdev_priv(dev);
2658
2659         if (port->state == EHEA_PORT_DOWN)
2660                 return 0;
2661
2662         ehea_drop_multicast_list(dev);
2663         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2664
2665         ehea_free_interrupts(dev);
2666
2667         port->state = EHEA_PORT_DOWN;
2668
2669         ehea_update_bcmc_registrations();
2670
2671         ret = ehea_clean_all_portres(port);
2672         if (ret)
2673                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2674
2675         ehea_update_firmware_handles();
2676
2677         return ret;
2678 }
2679
2680 static int ehea_stop(struct net_device *dev)
2681 {
2682         int ret;
2683         struct ehea_port *port = netdev_priv(dev);
2684
2685         netif_info(port, ifdown, dev, "disabling port\n");
2686
2687         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2688         cancel_work_sync(&port->reset_task);
2689         cancel_delayed_work_sync(&port->stats_work);
2690         mutex_lock(&port->port_lock);
2691         netif_stop_queue(dev);
2692         port_napi_disable(port);
2693         ret = ehea_down(dev);
2694         mutex_unlock(&port->port_lock);
2695         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2696         return ret;
2697 }
2698
2699 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2700 {
2701         struct ehea_qp qp = *orig_qp;
2702         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2703         struct ehea_swqe *swqe;
2704         int wqe_index;
2705         int i;
2706
2707         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2708                 swqe = ehea_get_swqe(&qp, &wqe_index);
2709                 swqe->tx_control |= EHEA_SWQE_PURGE;
2710         }
2711 }
2712
2713 static void ehea_flush_sq(struct ehea_port *port)
2714 {
2715         int i;
2716
2717         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2718                 struct ehea_port_res *pr = &port->port_res[i];
2719                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2720                 int ret;
2721
2722                 ret = wait_event_timeout(port->swqe_avail_wq,
2723                          atomic_read(&pr->swqe_avail) >= swqe_max,
2724                          msecs_to_jiffies(100));
2725
2726                 if (!ret) {
2727                         pr_err("WARNING: sq not flushed completely\n");
2728                         break;
2729                 }
2730         }
2731 }
2732
2733 int ehea_stop_qps(struct net_device *dev)
2734 {
2735         struct ehea_port *port = netdev_priv(dev);
2736         struct ehea_adapter *adapter = port->adapter;
2737         struct hcp_modify_qp_cb0 *cb0;
2738         int ret = -EIO;
2739         int dret;
2740         int i;
2741         u64 hret;
2742         u64 dummy64 = 0;
2743         u16 dummy16 = 0;
2744
2745         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2746         if (!cb0) {
2747                 ret = -ENOMEM;
2748                 goto out;
2749         }
2750
2751         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2752                 struct ehea_port_res *pr =  &port->port_res[i];
2753                 struct ehea_qp *qp = pr->qp;
2754
2755                 /* Purge send queue */
2756                 ehea_purge_sq(qp);
2757
2758                 /* Disable queue pair */
2759                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2760                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2761                                             cb0);
2762                 if (hret != H_SUCCESS) {
2763                         pr_err("query_ehea_qp failed (1)\n");
2764                         goto out;
2765                 }
2766
2767                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2768                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2769
2770                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2771                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2772                                                             1), cb0, &dummy64,
2773                                              &dummy64, &dummy16, &dummy16);
2774                 if (hret != H_SUCCESS) {
2775                         pr_err("modify_ehea_qp failed (1)\n");
2776                         goto out;
2777                 }
2778
2779                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2780                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2781                                             cb0);
2782                 if (hret != H_SUCCESS) {
2783                         pr_err("query_ehea_qp failed (2)\n");
2784                         goto out;
2785                 }
2786
2787                 /* deregister shared memory regions */
2788                 dret = ehea_rem_smrs(pr);
2789                 if (dret) {
2790                         pr_err("unreg shared memory region failed\n");
2791                         goto out;
2792                 }
2793         }
2794
2795         ret = 0;
2796 out:
2797         free_page((unsigned long)cb0);
2798
2799         return ret;
2800 }
2801
2802 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2803 {
2804         struct ehea_qp qp = *orig_qp;
2805         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2806         struct ehea_rwqe *rwqe;
2807         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2808         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2809         struct sk_buff *skb;
2810         u32 lkey = pr->recv_mr.lkey;
2811
2812
2813         int i;
2814         int index;
2815
2816         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2817                 rwqe = ehea_get_next_rwqe(&qp, 2);
2818                 rwqe->sg_list[0].l_key = lkey;
2819                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2820                 skb = skba_rq2[index];
2821                 if (skb)
2822                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2823         }
2824
2825         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2826                 rwqe = ehea_get_next_rwqe(&qp, 3);
2827                 rwqe->sg_list[0].l_key = lkey;
2828                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2829                 skb = skba_rq3[index];
2830                 if (skb)
2831                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2832         }
2833 }
2834
2835 int ehea_restart_qps(struct net_device *dev)
2836 {
2837         struct ehea_port *port = netdev_priv(dev);
2838         struct ehea_adapter *adapter = port->adapter;
2839         int ret = 0;
2840         int i;
2841
2842         struct hcp_modify_qp_cb0 *cb0;
2843         u64 hret;
2844         u64 dummy64 = 0;
2845         u16 dummy16 = 0;
2846
2847         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2848         if (!cb0) {
2849                 ret = -ENOMEM;
2850                 goto out;
2851         }
2852
2853         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2854                 struct ehea_port_res *pr =  &port->port_res[i];
2855                 struct ehea_qp *qp = pr->qp;
2856
2857                 ret = ehea_gen_smrs(pr);
2858                 if (ret) {
2859                         netdev_err(dev, "creation of shared memory regions failed\n");
2860                         goto out;
2861                 }
2862
2863                 ehea_update_rqs(qp, pr);
2864
2865                 /* Enable queue pair */
2866                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2867                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2868                                             cb0);
2869                 if (hret != H_SUCCESS) {
2870                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2871                         goto out;
2872                 }
2873
2874                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2875                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2876
2877                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2878                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2879                                                             1), cb0, &dummy64,
2880                                              &dummy64, &dummy16, &dummy16);
2881                 if (hret != H_SUCCESS) {
2882                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2883                         goto out;
2884                 }
2885
2886                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2887                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2888                                             cb0);
2889                 if (hret != H_SUCCESS) {
2890                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2891                         goto out;
2892                 }
2893
2894                 /* refill entire queue */
2895                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2896                 ehea_refill_rq2(pr, 0);
2897                 ehea_refill_rq3(pr, 0);
2898         }
2899 out:
2900         free_page((unsigned long)cb0);
2901
2902         return ret;
2903 }
2904
2905 static void ehea_reset_port(struct work_struct *work)
2906 {
2907         int ret;
2908         struct ehea_port *port =
2909                 container_of(work, struct ehea_port, reset_task);
2910         struct net_device *dev = port->netdev;
2911
2912         mutex_lock(&dlpar_mem_lock);
2913         port->resets++;
2914         mutex_lock(&port->port_lock);
2915         netif_stop_queue(dev);
2916
2917         port_napi_disable(port);
2918
2919         ehea_down(dev);
2920
2921         ret = ehea_up(dev);
2922         if (ret)
2923                 goto out;
2924
2925         ehea_set_multicast_list(dev);
2926
2927         netif_info(port, timer, dev, "reset successful\n");
2928
2929         port_napi_enable(port);
2930
2931         netif_wake_queue(dev);
2932 out:
2933         mutex_unlock(&port->port_lock);
2934         mutex_unlock(&dlpar_mem_lock);
2935 }
2936
2937 static void ehea_rereg_mrs(void)
2938 {
2939         int ret, i;
2940         struct ehea_adapter *adapter;
2941
2942         pr_info("LPAR memory changed - re-initializing driver\n");
2943
2944         list_for_each_entry(adapter, &adapter_list, list)
2945                 if (adapter->active_ports) {
2946                         /* Shutdown all ports */
2947                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2948                                 struct ehea_port *port = adapter->port[i];
2949                                 struct net_device *dev;
2950
2951                                 if (!port)
2952                                         continue;
2953
2954                                 dev = port->netdev;
2955
2956                                 if (dev->flags & IFF_UP) {
2957                                         mutex_lock(&port->port_lock);
2958                                         netif_stop_queue(dev);
2959                                         ehea_flush_sq(port);
2960                                         ret = ehea_stop_qps(dev);
2961                                         if (ret) {
2962                                                 mutex_unlock(&port->port_lock);
2963                                                 goto out;
2964                                         }
2965                                         port_napi_disable(port);
2966                                         mutex_unlock(&port->port_lock);
2967                                 }
2968                                 reset_sq_restart_flag(port);
2969                         }
2970
2971                         /* Unregister old memory region */
2972                         ret = ehea_rem_mr(&adapter->mr);
2973                         if (ret) {
2974                                 pr_err("unregister MR failed - driver inoperable!\n");
2975                                 goto out;
2976                         }
2977                 }
2978
2979         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2980
2981         list_for_each_entry(adapter, &adapter_list, list)
2982                 if (adapter->active_ports) {
2983                         /* Register new memory region */
2984                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2985                         if (ret) {
2986                                 pr_err("register MR failed - driver inoperable!\n");
2987                                 goto out;
2988                         }
2989
2990                         /* Restart all ports */
2991                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2992                                 struct ehea_port *port = adapter->port[i];
2993
2994                                 if (port) {
2995                                         struct net_device *dev = port->netdev;
2996
2997                                         if (dev->flags & IFF_UP) {
2998                                                 mutex_lock(&port->port_lock);
2999                                                 ret = ehea_restart_qps(dev);
3000                                                 if (!ret) {
3001                                                         check_sqs(port);
3002                                                         port_napi_enable(port);
3003                                                         netif_wake_queue(dev);
3004                                                 } else {
3005                                                         netdev_err(dev, "Unable to restart QPS\n");
3006                                                 }
3007                                                 mutex_unlock(&port->port_lock);
3008                                         }
3009                                 }
3010                         }
3011                 }
3012         pr_info("re-initializing driver complete\n");
3013 out:
3014         return;
3015 }
3016
3017 static void ehea_tx_watchdog(struct net_device *dev)
3018 {
3019         struct ehea_port *port = netdev_priv(dev);
3020
3021         if (netif_carrier_ok(dev) &&
3022             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3023                 ehea_schedule_port_reset(port);
3024 }
3025
3026 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3027 {
3028         struct hcp_query_ehea *cb;
3029         u64 hret;
3030         int ret;
3031
3032         cb = (void *)get_zeroed_page(GFP_KERNEL);
3033         if (!cb) {
3034                 ret = -ENOMEM;
3035                 goto out;
3036         }
3037
3038         hret = ehea_h_query_ehea(adapter->handle, cb);
3039
3040         if (hret != H_SUCCESS) {
3041                 ret = -EIO;
3042                 goto out_herr;
3043         }
3044
3045         adapter->max_mc_mac = cb->max_mc_mac - 1;
3046         ret = 0;
3047
3048 out_herr:
3049         free_page((unsigned long)cb);
3050 out:
3051         return ret;
3052 }
3053
3054 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3055 {
3056         struct hcp_ehea_port_cb4 *cb4;
3057         u64 hret;
3058         int ret = 0;
3059
3060         *jumbo = 0;
3061
3062         /* (Try to) enable *jumbo frames */
3063         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3064         if (!cb4) {
3065                 pr_err("no mem for cb4\n");
3066                 ret = -ENOMEM;
3067                 goto out;
3068         } else {
3069                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3070                                               port->logical_port_id,
3071                                               H_PORT_CB4,
3072                                               H_PORT_CB4_JUMBO, cb4);
3073                 if (hret == H_SUCCESS) {
3074                         if (cb4->jumbo_frame)
3075                                 *jumbo = 1;
3076                         else {
3077                                 cb4->jumbo_frame = 1;
3078                                 hret = ehea_h_modify_ehea_port(port->adapter->
3079                                                                handle,
3080                                                                port->
3081                                                                logical_port_id,
3082                                                                H_PORT_CB4,
3083                                                                H_PORT_CB4_JUMBO,
3084                                                                cb4);
3085                                 if (hret == H_SUCCESS)
3086                                         *jumbo = 1;
3087                         }
3088                 } else
3089                         ret = -EINVAL;
3090
3091                 free_page((unsigned long)cb4);
3092         }
3093 out:
3094         return ret;
3095 }
3096
3097 static ssize_t ehea_show_port_id(struct device *dev,
3098                                  struct device_attribute *attr, char *buf)
3099 {
3100         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3101         return sprintf(buf, "%d", port->logical_port_id);
3102 }
3103
3104 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3105                    NULL);
3106
3107 static void __devinit logical_port_release(struct device *dev)
3108 {
3109         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3110         of_node_put(port->ofdev.dev.of_node);
3111 }
3112
3113 static struct device *ehea_register_port(struct ehea_port *port,
3114                                          struct device_node *dn)
3115 {
3116         int ret;
3117
3118         port->ofdev.dev.of_node = of_node_get(dn);
3119         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3120         port->ofdev.dev.bus = &ibmebus_bus_type;
3121
3122         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3123         port->ofdev.dev.release = logical_port_release;
3124
3125         ret = of_device_register(&port->ofdev);
3126         if (ret) {
3127                 pr_err("failed to register device. ret=%d\n", ret);
3128                 goto out;
3129         }
3130
3131         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3132         if (ret) {
3133                 pr_err("failed to register attributes, ret=%d\n", ret);
3134                 goto out_unreg_of_dev;
3135         }
3136
3137         return &port->ofdev.dev;
3138
3139 out_unreg_of_dev:
3140         of_device_unregister(&port->ofdev);
3141 out:
3142         return NULL;
3143 }
3144
3145 static void ehea_unregister_port(struct ehea_port *port)
3146 {
3147         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3148         of_device_unregister(&port->ofdev);
3149 }
3150
3151 static const struct net_device_ops ehea_netdev_ops = {
3152         .ndo_open               = ehea_open,
3153         .ndo_stop               = ehea_stop,
3154         .ndo_start_xmit         = ehea_start_xmit,
3155 #ifdef CONFIG_NET_POLL_CONTROLLER
3156         .ndo_poll_controller    = ehea_netpoll,
3157 #endif
3158         .ndo_get_stats          = ehea_get_stats,
3159         .ndo_set_mac_address    = ehea_set_mac_addr,
3160         .ndo_validate_addr      = eth_validate_addr,
3161         .ndo_set_rx_mode        = ehea_set_multicast_list,
3162         .ndo_change_mtu         = ehea_change_mtu,
3163         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3164         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3165         .ndo_tx_timeout         = ehea_tx_watchdog,
3166 };
3167
3168 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3169                                          u32 logical_port_id,
3170                                          struct device_node *dn)
3171 {
3172         int ret;
3173         struct net_device *dev;
3174         struct ehea_port *port;
3175         struct device *port_dev;
3176         int jumbo;
3177
3178         /* allocate memory for the port structures */
3179         dev = alloc_etherdev(sizeof(struct ehea_port));
3180
3181         if (!dev) {
3182                 pr_err("no mem for net_device\n");
3183                 ret = -ENOMEM;
3184                 goto out_err;
3185         }
3186
3187         port = netdev_priv(dev);
3188
3189         mutex_init(&port->port_lock);
3190         port->state = EHEA_PORT_DOWN;
3191         port->sig_comp_iv = sq_entries / 10;
3192
3193         port->adapter = adapter;
3194         port->netdev = dev;
3195         port->logical_port_id = logical_port_id;
3196
3197         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3198
3199         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3200         if (!port->mc_list) {
3201                 ret = -ENOMEM;
3202                 goto out_free_ethdev;
3203         }
3204
3205         INIT_LIST_HEAD(&port->mc_list->list);
3206
3207         ret = ehea_sense_port_attr(port);
3208         if (ret)
3209                 goto out_free_mc_list;
3210
3211         port_dev = ehea_register_port(port, dn);
3212         if (!port_dev)
3213                 goto out_free_mc_list;
3214
3215         SET_NETDEV_DEV(dev, port_dev);
3216
3217         /* initialize net_device structure */
3218         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3219
3220         dev->netdev_ops = &ehea_netdev_ops;
3221         ehea_set_ethtool_ops(dev);
3222
3223         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3224                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3225         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3226                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3227                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3228                       | NETIF_F_RXCSUM;
3229         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3230
3231         if (use_lro)
3232                 dev->features |= NETIF_F_LRO;
3233
3234         INIT_WORK(&port->reset_task, ehea_reset_port);
3235         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3236
3237         init_waitqueue_head(&port->swqe_avail_wq);
3238         init_waitqueue_head(&port->restart_wq);
3239
3240         memset(&port->stats, 0, sizeof(struct net_device_stats));
3241         ret = register_netdev(dev);
3242         if (ret) {
3243                 pr_err("register_netdev failed. ret=%d\n", ret);
3244                 goto out_unreg_port;
3245         }
3246
3247         port->lro_max_aggr = lro_max_aggr;
3248
3249         ret = ehea_get_jumboframe_status(port, &jumbo);
3250         if (ret)
3251                 netdev_err(dev, "failed determining jumbo frame status\n");
3252
3253         netdev_info(dev, "Jumbo frames are %sabled\n",
3254                     jumbo == 1 ? "en" : "dis");
3255
3256         adapter->active_ports++;
3257
3258         return port;
3259
3260 out_unreg_port:
3261         ehea_unregister_port(port);
3262
3263 out_free_mc_list:
3264         kfree(port->mc_list);
3265
3266 out_free_ethdev:
3267         free_netdev(dev);
3268
3269 out_err:
3270         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3271                logical_port_id, ret);
3272         return NULL;
3273 }
3274
3275 static void ehea_shutdown_single_port(struct ehea_port *port)
3276 {
3277         struct ehea_adapter *adapter = port->adapter;
3278
3279         cancel_work_sync(&port->reset_task);
3280         cancel_delayed_work_sync(&port->stats_work);
3281         unregister_netdev(port->netdev);
3282         ehea_unregister_port(port);
3283         kfree(port->mc_list);
3284         free_netdev(port->netdev);
3285         adapter->active_ports--;
3286 }
3287
3288 static int ehea_setup_ports(struct ehea_adapter *adapter)
3289 {
3290         struct device_node *lhea_dn;
3291         struct device_node *eth_dn = NULL;
3292
3293         const u32 *dn_log_port_id;
3294         int i = 0;
3295
3296         lhea_dn = adapter->ofdev->dev.of_node;
3297         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3298
3299                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3300                                                  NULL);
3301                 if (!dn_log_port_id) {
3302                         pr_err("bad device node: eth_dn name=%s\n",
3303                                eth_dn->full_name);
3304                         continue;
3305                 }
3306
3307                 if (ehea_add_adapter_mr(adapter)) {
3308                         pr_err("creating MR failed\n");
3309                         of_node_put(eth_dn);
3310                         return -EIO;
3311                 }
3312
3313                 adapter->port[i] = ehea_setup_single_port(adapter,
3314                                                           *dn_log_port_id,
3315                                                           eth_dn);
3316                 if (adapter->port[i])
3317                         netdev_info(adapter->port[i]->netdev,
3318                                     "logical port id #%d\n", *dn_log_port_id);
3319                 else
3320                         ehea_remove_adapter_mr(adapter);
3321
3322                 i++;
3323         }
3324         return 0;
3325 }
3326
3327 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3328                                            u32 logical_port_id)
3329 {
3330         struct device_node *lhea_dn;
3331         struct device_node *eth_dn = NULL;
3332         const u32 *dn_log_port_id;
3333
3334         lhea_dn = adapter->ofdev->dev.of_node;
3335         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3336
3337                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3338                                                  NULL);
3339                 if (dn_log_port_id)
3340                         if (*dn_log_port_id == logical_port_id)
3341                                 return eth_dn;
3342         }
3343
3344         return NULL;
3345 }
3346
3347 static ssize_t ehea_probe_port(struct device *dev,
3348                                struct device_attribute *attr,
3349                                const char *buf, size_t count)
3350 {
3351         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3352         struct ehea_port *port;
3353         struct device_node *eth_dn = NULL;
3354         int i;
3355
3356         u32 logical_port_id;
3357
3358         sscanf(buf, "%d", &logical_port_id);
3359
3360         port = ehea_get_port(adapter, logical_port_id);
3361
3362         if (port) {
3363                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3364                             logical_port_id);
3365                 return -EINVAL;
3366         }
3367
3368         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3369
3370         if (!eth_dn) {
3371                 pr_info("no logical port with id %d found\n", logical_port_id);
3372                 return -EINVAL;
3373         }
3374
3375         if (ehea_add_adapter_mr(adapter)) {
3376                 pr_err("creating MR failed\n");
3377                 return -EIO;
3378         }
3379
3380         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3381
3382         of_node_put(eth_dn);
3383
3384         if (port) {
3385                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3386                         if (!adapter->port[i]) {
3387                                 adapter->port[i] = port;
3388                                 break;
3389                         }
3390
3391                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3392                             logical_port_id);
3393         } else {
3394                 ehea_remove_adapter_mr(adapter);
3395                 return -EIO;
3396         }
3397
3398         return (ssize_t) count;
3399 }
3400
3401 static ssize_t ehea_remove_port(struct device *dev,
3402                                 struct device_attribute *attr,
3403                                 const char *buf, size_t count)
3404 {
3405         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3406         struct ehea_port *port;
3407         int i;
3408         u32 logical_port_id;
3409
3410         sscanf(buf, "%d", &logical_port_id);
3411
3412         port = ehea_get_port(adapter, logical_port_id);
3413
3414         if (port) {
3415                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3416                             logical_port_id);
3417
3418                 ehea_shutdown_single_port(port);
3419
3420                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3421                         if (adapter->port[i] == port) {
3422                                 adapter->port[i] = NULL;
3423                                 break;
3424                         }
3425         } else {
3426                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3427                        logical_port_id);
3428                 return -EINVAL;
3429         }
3430
3431         ehea_remove_adapter_mr(adapter);
3432
3433         return (ssize_t) count;
3434 }
3435
3436 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3437 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3438
3439 int ehea_create_device_sysfs(struct platform_device *dev)
3440 {
3441         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3442         if (ret)
3443                 goto out;
3444
3445         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3446 out:
3447         return ret;
3448 }
3449
3450 void ehea_remove_device_sysfs(struct platform_device *dev)
3451 {
3452         device_remove_file(&dev->dev, &dev_attr_probe_port);
3453         device_remove_file(&dev->dev, &dev_attr_remove_port);
3454 }
3455
3456 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3457                                         const struct of_device_id *id)
3458 {
3459         struct ehea_adapter *adapter;
3460         const u64 *adapter_handle;
3461         int ret;
3462
3463         if (!dev || !dev->dev.of_node) {
3464                 pr_err("Invalid ibmebus device probed\n");
3465                 return -EINVAL;
3466         }
3467
3468         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3469         if (!adapter) {
3470                 ret = -ENOMEM;
3471                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3472                 goto out;
3473         }
3474
3475         list_add(&adapter->list, &adapter_list);
3476
3477         adapter->ofdev = dev;
3478
3479         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3480                                          NULL);
3481         if (adapter_handle)
3482                 adapter->handle = *adapter_handle;
3483
3484         if (!adapter->handle) {
3485                 dev_err(&dev->dev, "failed getting handle for adapter"
3486                         " '%s'\n", dev->dev.of_node->full_name);
3487                 ret = -ENODEV;
3488                 goto out_free_ad;
3489         }
3490
3491         adapter->pd = EHEA_PD_ID;
3492
3493         dev_set_drvdata(&dev->dev, adapter);
3494
3495
3496         /* initialize adapter and ports */
3497         /* get adapter properties */
3498         ret = ehea_sense_adapter_attr(adapter);
3499         if (ret) {
3500                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3501                 goto out_free_ad;
3502         }
3503
3504         adapter->neq = ehea_create_eq(adapter,
3505                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3506         if (!adapter->neq) {
3507                 ret = -EIO;
3508                 dev_err(&dev->dev, "NEQ creation failed\n");
3509                 goto out_free_ad;
3510         }
3511
3512         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3513                      (unsigned long)adapter);
3514
3515         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3516                                   ehea_interrupt_neq, IRQF_DISABLED,
3517                                   "ehea_neq", adapter);
3518         if (ret) {
3519                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3520                 goto out_kill_eq;
3521         }
3522
3523         ret = ehea_create_device_sysfs(dev);
3524         if (ret)
3525                 goto out_free_irq;
3526
3527         ret = ehea_setup_ports(adapter);
3528         if (ret) {
3529                 dev_err(&dev->dev, "setup_ports failed\n");
3530                 goto out_rem_dev_sysfs;
3531         }
3532
3533         ret = 0;
3534         goto out;
3535
3536 out_rem_dev_sysfs:
3537         ehea_remove_device_sysfs(dev);
3538
3539 out_free_irq:
3540         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3541
3542 out_kill_eq:
3543         ehea_destroy_eq(adapter->neq);
3544
3545 out_free_ad:
3546         list_del(&adapter->list);
3547         kfree(adapter);
3548
3549 out:
3550         ehea_update_firmware_handles();
3551
3552         return ret;
3553 }
3554
3555 static int __devexit ehea_remove(struct platform_device *dev)
3556 {
3557         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3558         int i;
3559
3560         for (i = 0; i < EHEA_MAX_PORTS; i++)
3561                 if (adapter->port[i]) {
3562                         ehea_shutdown_single_port(adapter->port[i]);
3563                         adapter->port[i] = NULL;
3564                 }
3565
3566         ehea_remove_device_sysfs(dev);
3567
3568         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3569         tasklet_kill(&adapter->neq_tasklet);
3570
3571         ehea_destroy_eq(adapter->neq);
3572         ehea_remove_adapter_mr(adapter);
3573         list_del(&adapter->list);
3574         kfree(adapter);
3575
3576         ehea_update_firmware_handles();
3577
3578         return 0;
3579 }
3580
3581 void ehea_crash_handler(void)
3582 {
3583         int i;
3584
3585         if (ehea_fw_handles.arr)
3586                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3587                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3588                                              ehea_fw_handles.arr[i].fwh,
3589                                              FORCE_FREE);
3590
3591         if (ehea_bcmc_regs.arr)
3592                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3593                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3594                                               ehea_bcmc_regs.arr[i].port_id,
3595                                               ehea_bcmc_regs.arr[i].reg_type,
3596                                               ehea_bcmc_regs.arr[i].macaddr,
3597                                               0, H_DEREG_BCMC);
3598 }
3599
3600 static int ehea_mem_notifier(struct notifier_block *nb,
3601                              unsigned long action, void *data)
3602 {
3603         int ret = NOTIFY_BAD;
3604         struct memory_notify *arg = data;
3605
3606         mutex_lock(&dlpar_mem_lock);
3607
3608         switch (action) {
3609         case MEM_CANCEL_OFFLINE:
3610                 pr_info("memory offlining canceled");
3611                 /* Readd canceled memory block */
3612         case MEM_ONLINE:
3613                 pr_info("memory is going online");
3614                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3615                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3616                         goto out_unlock;
3617                 ehea_rereg_mrs();
3618                 break;
3619         case MEM_GOING_OFFLINE:
3620                 pr_info("memory is going offline");
3621                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3622                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3623                         goto out_unlock;
3624                 ehea_rereg_mrs();
3625                 break;
3626         default:
3627                 break;
3628         }
3629
3630         ehea_update_firmware_handles();
3631         ret = NOTIFY_OK;
3632
3633 out_unlock:
3634         mutex_unlock(&dlpar_mem_lock);
3635         return ret;
3636 }
3637
3638 static struct notifier_block ehea_mem_nb = {
3639         .notifier_call = ehea_mem_notifier,
3640 };
3641
3642 static int ehea_reboot_notifier(struct notifier_block *nb,
3643                                 unsigned long action, void *unused)
3644 {
3645         if (action == SYS_RESTART) {
3646                 pr_info("Reboot: freeing all eHEA resources\n");
3647                 ibmebus_unregister_driver(&ehea_driver);
3648         }
3649         return NOTIFY_DONE;
3650 }
3651
3652 static struct notifier_block ehea_reboot_nb = {
3653         .notifier_call = ehea_reboot_notifier,
3654 };
3655
3656 static int check_module_parm(void)
3657 {
3658         int ret = 0;
3659
3660         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3661             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3662                 pr_info("Bad parameter: rq1_entries\n");
3663                 ret = -EINVAL;
3664         }
3665         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3666             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3667                 pr_info("Bad parameter: rq2_entries\n");
3668                 ret = -EINVAL;
3669         }
3670         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3671             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3672                 pr_info("Bad parameter: rq3_entries\n");
3673                 ret = -EINVAL;
3674         }
3675         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3676             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3677                 pr_info("Bad parameter: sq_entries\n");
3678                 ret = -EINVAL;
3679         }
3680
3681         return ret;
3682 }
3683
3684 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3685                                       char *buf)
3686 {
3687         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3688 }
3689
3690 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3691                    ehea_show_capabilities, NULL);
3692
3693 int __init ehea_module_init(void)
3694 {
3695         int ret;
3696
3697         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3698
3699         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3700         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3701
3702         mutex_init(&ehea_fw_handles.lock);
3703         spin_lock_init(&ehea_bcmc_regs.lock);
3704
3705         ret = check_module_parm();
3706         if (ret)
3707                 goto out;
3708
3709         ret = ehea_create_busmap();
3710         if (ret)
3711                 goto out;
3712
3713         ret = register_reboot_notifier(&ehea_reboot_nb);
3714         if (ret)
3715                 pr_info("failed registering reboot notifier\n");
3716
3717         ret = register_memory_notifier(&ehea_mem_nb);
3718         if (ret)
3719                 pr_info("failed registering memory remove notifier\n");
3720
3721         ret = crash_shutdown_register(ehea_crash_handler);
3722         if (ret)
3723                 pr_info("failed registering crash handler\n");
3724
3725         ret = ibmebus_register_driver(&ehea_driver);
3726         if (ret) {
3727                 pr_err("failed registering eHEA device driver on ebus\n");
3728                 goto out2;
3729         }
3730
3731         ret = driver_create_file(&ehea_driver.driver,
3732                                  &driver_attr_capabilities);
3733         if (ret) {
3734                 pr_err("failed to register capabilities attribute, ret=%d\n",
3735                        ret);
3736                 goto out3;
3737         }
3738
3739         return ret;
3740
3741 out3:
3742         ibmebus_unregister_driver(&ehea_driver);
3743 out2:
3744         unregister_memory_notifier(&ehea_mem_nb);
3745         unregister_reboot_notifier(&ehea_reboot_nb);
3746         crash_shutdown_unregister(ehea_crash_handler);
3747 out:
3748         return ret;
3749 }
3750
3751 static void __exit ehea_module_exit(void)
3752 {
3753         int ret;
3754
3755         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3756         ibmebus_unregister_driver(&ehea_driver);
3757         unregister_reboot_notifier(&ehea_reboot_nb);
3758         ret = crash_shutdown_unregister(ehea_crash_handler);
3759         if (ret)
3760                 pr_info("failed unregistering crash handler\n");
3761         unregister_memory_notifier(&ehea_mem_nb);
3762         kfree(ehea_fw_handles.arr);
3763         kfree(ehea_bcmc_regs.arr);
3764         ehea_destroy_busmap();
3765 }
3766
3767 module_init(ehea_module_init);
3768 module_exit(ehea_module_exit);