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

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs;
  65 static int use_lro;
  66 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  67 static int num_tx_qps = EHEA_NUM_TX_QP;
  68 static int prop_carrier_state;
  69
  70 module_param(msg_level, int, 0);
  71 module_param(rq1_entries, int, 0);
  72 module_param(rq2_entries, int, 0);
  73 module_param(rq3_entries, int, 0);
  74 module_param(sq_entries, int, 0);
  75 module_param(prop_carrier_state, int, 0);
  76 module_param(use_mcs, int, 0);
  77 module_param(use_lro, int, 0);
  78 module_param(lro_max_aggr, int, 0);
  79 module_param(num_tx_qps, int, 0);
  80
  81 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  82 MODULE_PARM_DESC(msg_level, "msg_level");
  83 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  84                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  85 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  88 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  91 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  94 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  95                  "[2^x - 1], x = [6..14]. Default = "
  96                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  97 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  98
  99 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
 100                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 101 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 102                  "Default = 0");
 103
 104 static int port_name_cnt;
 105 static LIST_HEAD(adapter_list);
 106 static unsigned long ehea_driver_flags;
 107 static DEFINE_MUTEX(dlpar_mem_lock);
 108 struct ehea_fw_handle_array ehea_fw_handles;
 109 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 110
 111
 112 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 113                                         const struct of_device_id *id);
 114
 115 static int __devexit ehea_remove(struct platform_device *dev);
 116
 117 static struct of_device_id ehea_device_table[] = {
 118         {
 119                 .name = "lhea",
 120                 .compatible = "IBM,lhea",
 121         },
 122         {},
 123 };
 124 MODULE_DEVICE_TABLE(of, ehea_device_table);
 125
 126 static struct of_platform_driver ehea_driver = {
 127         .driver = {
 128                 .name = "ehea",
 129                 .owner = THIS_MODULE,
 130                 .of_match_table = ehea_device_table,
 131         },
 132         .probe = ehea_probe_adapter,
 133         .remove = ehea_remove,
 134 };
 135
 136 void ehea_dump(void *adr, int len, char *msg)
 137 {
 138         int x;
 139         unsigned char *deb = adr;
 140         for (x = 0; x < len; x += 16) {
 141                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 142                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 143                 deb += 16;
 144         }
 145 }
 146
 147 void ehea_schedule_port_reset(struct ehea_port *port)
 148 {
 149         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 150                 schedule_work(&port->reset_task);
 151 }
 152
 153 static void ehea_update_firmware_handles(void)
 154 {
 155         struct ehea_fw_handle_entry *arr = NULL;
 156         struct ehea_adapter *adapter;
 157         int num_adapters = 0;
 158         int num_ports = 0;
 159         int num_portres = 0;
 160         int i = 0;
 161         int num_fw_handles, k, l;
 162
 163         /* Determine number of handles */
 164         mutex_lock(&ehea_fw_handles.lock);
 165
 166         list_for_each_entry(adapter, &adapter_list, list) {
 167                 num_adapters++;
 168
 169                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 170                         struct ehea_port *port = adapter->port[k];
 171
 172                         if (!port || (port->state != EHEA_PORT_UP))
 173                                 continue;
 174
 175                         num_ports++;
 176                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 177                 }
 178         }
 179
 180         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 181                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 182                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 183
 184         if (num_fw_handles) {
 185                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 186                 if (!arr)
 187                         goto out;  /* Keep the existing array */
 188         } else
 189                 goto out_update;
 190
 191         list_for_each_entry(adapter, &adapter_list, list) {
 192                 if (num_adapters == 0)
 193                         break;
 194
 195                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 196                         struct ehea_port *port = adapter->port[k];
 197
 198                         if (!port || (port->state != EHEA_PORT_UP) ||
 199                             (num_ports == 0))
 200                                 continue;
 201
 202                         for (l = 0;
 203                              l < port->num_def_qps + port->num_add_tx_qps;
 204                              l++) {
 205                                 struct ehea_port_res *pr = &port->port_res[l];
 206
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->qp->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->send_cq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->eq->fw_handle;
 215                                 arr[i].adh = adapter->handle;
 216                                 arr[i++].fwh = pr->send_mr.handle;
 217                                 arr[i].adh = adapter->handle;
 218                                 arr[i++].fwh = pr->recv_mr.handle;
 219                         }
 220                         arr[i].adh = adapter->handle;
 221                         arr[i++].fwh = port->qp_eq->fw_handle;
 222                         num_ports--;
 223                 }
 224
 225                 arr[i].adh = adapter->handle;
 226                 arr[i++].fwh = adapter->neq->fw_handle;
 227
 228                 if (adapter->mr.handle) {
 229                         arr[i].adh = adapter->handle;
 230                         arr[i++].fwh = adapter->mr.handle;
 231                 }
 232                 num_adapters--;
 233         }
 234
 235 out_update:
 236         kfree(ehea_fw_handles.arr);
 237         ehea_fw_handles.arr = arr;
 238         ehea_fw_handles.num_entries = i;
 239 out:
 240         mutex_unlock(&ehea_fw_handles.lock);
 241 }
 242
 243 static void ehea_update_bcmc_registrations(void)
 244 {
 245         unsigned long flags;
 246         struct ehea_bcmc_reg_entry *arr = NULL;
 247         struct ehea_adapter *adapter;
 248         struct ehea_mc_list *mc_entry;
 249         int num_registrations = 0;
 250         int i = 0;
 251         int k;
 252
 253         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 254
 255         /* Determine number of registrations */
 256         list_for_each_entry(adapter, &adapter_list, list)
 257                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 258                         struct ehea_port *port = adapter->port[k];
 259
 260                         if (!port || (port->state != EHEA_PORT_UP))
 261                                 continue;
 262
 263                         num_registrations += 2; /* Broadcast registrations */
 264
 265                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 266                                 num_registrations += 2;
 267                 }
 268
 269         if (num_registrations) {
 270                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 271                 if (!arr)
 272                         goto out;  /* Keep the existing array */
 273         } else
 274                 goto out_update;
 275
 276         list_for_each_entry(adapter, &adapter_list, list) {
 277                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 278                         struct ehea_port *port = adapter->port[k];
 279
 280                         if (!port || (port->state != EHEA_PORT_UP))
 281                                 continue;
 282
 283                         if (num_registrations == 0)
 284                                 goto out_update;
 285
 286                         arr[i].adh = adapter->handle;
 287                         arr[i].port_id = port->logical_port_id;
 288                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 289                                           EHEA_BCMC_UNTAGGED;
 290                         arr[i++].macaddr = port->mac_addr;
 291
 292                         arr[i].adh = adapter->handle;
 293                         arr[i].port_id = port->logical_port_id;
 294                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 295                                           EHEA_BCMC_VLANID_ALL;
 296                         arr[i++].macaddr = port->mac_addr;
 297                         num_registrations -= 2;
 298
 299                         list_for_each_entry(mc_entry,
 300                                             &port->mc_list->list, list) {
 301                                 if (num_registrations == 0)
 302                                         goto out_update;
 303
 304                                 arr[i].adh = adapter->handle;
 305                                 arr[i].port_id = port->logical_port_id;
 306                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 307                                                   EHEA_BCMC_MULTICAST |
 308                                                   EHEA_BCMC_UNTAGGED;
 309                                 arr[i++].macaddr = mc_entry->macaddr;
 310
 311                                 arr[i].adh = adapter->handle;
 312                                 arr[i].port_id = port->logical_port_id;
 313                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 314                                                   EHEA_BCMC_MULTICAST |
 315                                                   EHEA_BCMC_VLANID_ALL;
 316                                 arr[i++].macaddr = mc_entry->macaddr;
 317                                 num_registrations -= 2;
 318                         }
 319                 }
 320         }
 321
 322 out_update:
 323         kfree(ehea_bcmc_regs.arr);
 324         ehea_bcmc_regs.arr = arr;
 325         ehea_bcmc_regs.num_entries = i;
 326 out:
 327         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 328 }
 329
 330 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 331 {
 332         struct ehea_port *port = netdev_priv(dev);
 333         struct net_device_stats *stats = &port->stats;
 334         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 335         int i;
 336
 337         for (i = 0; i < port->num_def_qps; i++) {
 338                 rx_packets += port->port_res[i].rx_packets;
 339                 rx_bytes   += port->port_res[i].rx_bytes;
 340         }
 341
 342         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 343                 tx_packets += port->port_res[i].tx_packets;
 344                 tx_bytes   += port->port_res[i].tx_bytes;
 345         }
 346
 347         stats->tx_packets = tx_packets;
 348         stats->rx_bytes = rx_bytes;
 349         stats->tx_bytes = tx_bytes;
 350         stats->rx_packets = rx_packets;
 351
 352         return &port->stats;
 353 }
 354
 355 static void ehea_update_stats(struct work_struct *work)
 356 {
 357         struct ehea_port *port =
 358                 container_of(work, struct ehea_port, stats_work.work);
 359         struct net_device *dev = port->netdev;
 360         struct net_device_stats *stats = &port->stats;
 361         struct hcp_ehea_port_cb2 *cb2;
 362         u64 hret;
 363
 364         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 365         if (!cb2) {
 366                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 367                 goto resched;
 368         }
 369
 370         hret = ehea_h_query_ehea_port(port->adapter->handle,
 371                                       port->logical_port_id,
 372                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 373         if (hret != H_SUCCESS) {
 374                 netdev_err(dev, "query_ehea_port failed\n");
 375                 goto out_herr;
 376         }
 377
 378         if (netif_msg_hw(port))
 379                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 380
 381         stats->multicast = cb2->rxmcp;
 382         stats->rx_errors = cb2->rxuerr;
 383
 384 out_herr:
 385         free_page((unsigned long)cb2);
 386 resched:
 387         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 388 }
 389
 390 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 391 {
 392         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 393         struct net_device *dev = pr->port->netdev;
 394         int max_index_mask = pr->rq1_skba.len - 1;
 395         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 396         int adder = 0;
 397         int i;
 398
 399         pr->rq1_skba.os_skbs = 0;
 400
 401         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 402                 if (nr_of_wqes > 0)
 403                         pr->rq1_skba.index = index;
 404                 pr->rq1_skba.os_skbs = fill_wqes;
 405                 return;
 406         }
 407
 408         for (i = 0; i < fill_wqes; i++) {
 409                 if (!skb_arr_rq1[index]) {
 410                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 411                                                               EHEA_L_PKT_SIZE);
 412                         if (!skb_arr_rq1[index]) {
 413                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 414                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 415                                 break;
 416                         }
 417                 }
 418                 index--;
 419                 index &= max_index_mask;
 420                 adder++;
 421         }
 422
 423         if (adder == 0)
 424                 return;
 425
 426         /* Ring doorbell */
 427         ehea_update_rq1a(pr->qp, adder);
 428 }
 429
 430 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 431 {
 432         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 433         struct net_device *dev = pr->port->netdev;
 434         int i;
 435
 436         if (nr_rq1a > pr->rq1_skba.len) {
 437                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 438                 return;
 439         }
 440
 441         for (i = 0; i < nr_rq1a; i++) {
 442                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 443                 if (!skb_arr_rq1[i]) {
 444                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 445                         break;
 446                 }
 447         }
 448         /* Ring doorbell */
 449         ehea_update_rq1a(pr->qp, i - 1);
 450 }
 451
 452 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 453                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 454                               int num_wqes, int wqe_type, int packet_size)
 455 {
 456         struct net_device *dev = pr->port->netdev;
 457         struct ehea_qp *qp = pr->qp;
 458         struct sk_buff **skb_arr = q_skba->arr;
 459         struct ehea_rwqe *rwqe;
 460         int i, index, max_index_mask, fill_wqes;
 461         int adder = 0;
 462         int ret = 0;
 463
 464         fill_wqes = q_skba->os_skbs + num_wqes;
 465         q_skba->os_skbs = 0;
 466
 467         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 468                 q_skba->os_skbs = fill_wqes;
 469                 return ret;
 470         }
 471
 472         index = q_skba->index;
 473         max_index_mask = q_skba->len - 1;
 474         for (i = 0; i < fill_wqes; i++) {
 475                 u64 tmp_addr;
 476                 struct sk_buff *skb;
 477
 478                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 479                 if (!skb) {
 480                         q_skba->os_skbs = fill_wqes - i;
 481                         if (q_skba->os_skbs == q_skba->len - 2) {
 482                                 netdev_info(pr->port->netdev,
 483                                             "rq%i ran dry - no mem for skb\n",
 484                                             rq_nr);
 485                                 ret = -ENOMEM;
 486                         }
 487                         break;
 488                 }
 489
 490                 skb_arr[index] = skb;
 491                 tmp_addr = ehea_map_vaddr(skb->data);
 492                 if (tmp_addr == -1) {
 493                         dev_kfree_skb(skb);
 494                         q_skba->os_skbs = fill_wqes - i;
 495                         ret = 0;
 496                         break;
 497                 }
 498
 499                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 500                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 501                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 502                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 503                 rwqe->sg_list[0].vaddr = tmp_addr;
 504                 rwqe->sg_list[0].len = packet_size;
 505                 rwqe->data_segments = 1;
 506
 507                 index++;
 508                 index &= max_index_mask;
 509                 adder++;
 510         }
 511
 512         q_skba->index = index;
 513         if (adder == 0)
 514                 goto out;
 515
 516         /* Ring doorbell */
 517         iosync();
 518         if (rq_nr == 2)
 519                 ehea_update_rq2a(pr->qp, adder);
 520         else
 521                 ehea_update_rq3a(pr->qp, adder);
 522 out:
 523         return ret;
 524 }
 525
 526
 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 528 {
 529         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 530                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 531                                   EHEA_RQ2_PKT_SIZE);
 532 }
 533
 534
 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 536 {
 537         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 538                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 539                                   EHEA_MAX_PACKET_SIZE);
 540 }
 541
 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 543 {
 544         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 545         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 546                 return 0;
 547         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 548             (cqe->header_length == 0))
 549                 return 0;
 550         return -EINVAL;
 551 }
 552
 553 static inline void ehea_fill_skb(struct net_device *dev,
 554                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 555 {
 556         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 557
 558         skb_put(skb, length);
 559         skb->protocol = eth_type_trans(skb, dev);
 560
 561         /* The packet was not an IPV4 packet so a complemented checksum was
 562            calculated. The value is found in the Internet Checksum field. */
 563         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 564                 skb->ip_summed = CHECKSUM_COMPLETE;
 565                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 566         } else
 567                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 568 }
 569
 570 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 571                                                int arr_len,
 572                                                struct ehea_cqe *cqe)
 573 {
 574         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 575         struct sk_buff *skb;
 576         void *pref;
 577         int x;
 578
 579         x = skb_index + 1;
 580         x &= (arr_len - 1);
 581
 582         pref = skb_array[x];
 583         if (pref) {
 584                 prefetchw(pref);
 585                 prefetchw(pref + EHEA_CACHE_LINE);
 586
 587                 pref = (skb_array[x]->data);
 588                 prefetch(pref);
 589                 prefetch(pref + EHEA_CACHE_LINE);
 590                 prefetch(pref + EHEA_CACHE_LINE * 2);
 591                 prefetch(pref + EHEA_CACHE_LINE * 3);
 592         }
 593
 594         skb = skb_array[skb_index];
 595         skb_array[skb_index] = NULL;
 596         return skb;
 597 }
 598
 599 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 600                                                   int arr_len, int wqe_index)
 601 {
 602         struct sk_buff *skb;
 603         void *pref;
 604         int x;
 605
 606         x = wqe_index + 1;
 607         x &= (arr_len - 1);
 608
 609         pref = skb_array[x];
 610         if (pref) {
 611                 prefetchw(pref);
 612                 prefetchw(pref + EHEA_CACHE_LINE);
 613
 614                 pref = (skb_array[x]->data);
 615                 prefetchw(pref);
 616                 prefetchw(pref + EHEA_CACHE_LINE);
 617         }
 618
 619         skb = skb_array[wqe_index];
 620         skb_array[wqe_index] = NULL;
 621         return skb;
 622 }
 623
 624 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 625                                  struct ehea_cqe *cqe, int *processed_rq2,
 626                                  int *processed_rq3)
 627 {
 628         struct sk_buff *skb;
 629
 630         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 631                 pr->p_stats.err_tcp_cksum++;
 632         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 633                 pr->p_stats.err_ip_cksum++;
 634         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 635                 pr->p_stats.err_frame_crc++;
 636
 637         if (rq == 2) {
 638                 *processed_rq2 += 1;
 639                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 640                 dev_kfree_skb(skb);
 641         } else if (rq == 3) {
 642                 *processed_rq3 += 1;
 643                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 644                 dev_kfree_skb(skb);
 645         }
 646
 647         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 648                 if (netif_msg_rx_err(pr->port)) {
 649                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 650                                pr->qp->init_attr.qp_nr);
 651                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 652                 }
 653                 ehea_schedule_port_reset(pr->port);
 654                 return 1;
 655         }
 656
 657         return 0;
 658 }
 659
 660 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 661                        void **tcph, u64 *hdr_flags, void *priv)
 662 {
 663         struct ehea_cqe *cqe = priv;
 664         unsigned int ip_len;
 665         struct iphdr *iph;
 666
 667         /* non tcp/udp packets */
 668         if (!cqe->header_length)
 669                 return -1;
 670
 671         /* non tcp packet */
 672         skb_reset_network_header(skb);
 673         iph = ip_hdr(skb);
 674         if (iph->protocol != IPPROTO_TCP)
 675                 return -1;
 676
 677         ip_len = ip_hdrlen(skb);
 678         skb_set_transport_header(skb, ip_len);
 679         *tcph = tcp_hdr(skb);
 680
 681         /* check if ip header and tcp header are complete */
 682         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 683                 return -1;
 684
 685         *hdr_flags = LRO_IPV4 | LRO_TCP;
 686         *iphdr = iph;
 687
 688         return 0;
 689 }
 690
 691 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 692                           struct sk_buff *skb)
 693 {
 694         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 695                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 696
 697         if (skb->dev->features & NETIF_F_LRO)
 698                 lro_receive_skb(&pr->lro_mgr, skb, cqe);
 699         else
 700                 netif_receive_skb(skb);
 701 }
 702
 703 static int ehea_proc_rwqes(struct net_device *dev,
 704                            struct ehea_port_res *pr,
 705                            int budget)
 706 {
 707         struct ehea_port *port = pr->port;
 708         struct ehea_qp *qp = pr->qp;
 709         struct ehea_cqe *cqe;
 710         struct sk_buff *skb;
 711         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 712         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 713         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 714         int skb_arr_rq1_len = pr->rq1_skba.len;
 715         int skb_arr_rq2_len = pr->rq2_skba.len;
 716         int skb_arr_rq3_len = pr->rq3_skba.len;
 717         int processed, processed_rq1, processed_rq2, processed_rq3;
 718         u64 processed_bytes = 0;
 719         int wqe_index, last_wqe_index, rq, port_reset;
 720
 721         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 722         last_wqe_index = 0;
 723
 724         cqe = ehea_poll_rq1(qp, &wqe_index);
 725         while ((processed < budget) && cqe) {
 726                 ehea_inc_rq1(qp);
 727                 processed_rq1++;
 728                 processed++;
 729                 if (netif_msg_rx_status(port))
 730                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 731
 732                 last_wqe_index = wqe_index;
 733                 rmb();
 734                 if (!ehea_check_cqe(cqe, &rq)) {
 735                         if (rq == 1) {
 736                                 /* LL RQ1 */
 737                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 738                                                           skb_arr_rq1_len,
 739                                                           wqe_index);
 740                                 if (unlikely(!skb)) {
 741                                         netif_info(port, rx_err, dev,
 742                                                   "LL rq1: skb=NULL\n");
 743
 744                                         skb = netdev_alloc_skb(dev,
 745                                                                EHEA_L_PKT_SIZE);
 746                                         if (!skb) {
 747                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 748                                                 break;
 749                                         }
 750                                 }
 751                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 752                                                  cqe->num_bytes_transfered - 4);
 753                                 ehea_fill_skb(dev, skb, cqe);
 754                         } else if (rq == 2) {
 755                                 /* RQ2 */
 756                                 skb = get_skb_by_index(skb_arr_rq2,
 757                                                        skb_arr_rq2_len, cqe);
 758                                 if (unlikely(!skb)) {
 759                                         netif_err(port, rx_err, dev,
 760                                                   "rq2: skb=NULL\n");
 761                                         break;
 762                                 }
 763                                 ehea_fill_skb(dev, skb, cqe);
 764                                 processed_rq2++;
 765                         } else {
 766                                 /* RQ3 */
 767                                 skb = get_skb_by_index(skb_arr_rq3,
 768                                                        skb_arr_rq3_len, cqe);
 769                                 if (unlikely(!skb)) {
 770                                         netif_err(port, rx_err, dev,
 771                                                   "rq3: skb=NULL\n");
 772                                         break;
 773                                 }
 774                                 ehea_fill_skb(dev, skb, cqe);
 775                                 processed_rq3++;
 776                         }
 777
 778                         processed_bytes += skb->len;
 779                         ehea_proc_skb(pr, cqe, skb);
 780                 } else {
 781                         pr->p_stats.poll_receive_errors++;
 782                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 783                                                            &processed_rq2,
 784                                                            &processed_rq3);
 785                         if (port_reset)
 786                                 break;
 787                 }
 788                 cqe = ehea_poll_rq1(qp, &wqe_index);
 789         }
 790         if (dev->features & NETIF_F_LRO)
 791                 lro_flush_all(&pr->lro_mgr);
 792
 793         pr->rx_packets += processed;
 794         pr->rx_bytes += processed_bytes;
 795
 796         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 797         ehea_refill_rq2(pr, processed_rq2);
 798         ehea_refill_rq3(pr, processed_rq3);
 799
 800         return processed;
 801 }
 802
 803 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 804
 805 static void reset_sq_restart_flag(struct ehea_port *port)
 806 {
 807         int i;
 808
 809         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 810                 struct ehea_port_res *pr = &port->port_res[i];
 811                 pr->sq_restart_flag = 0;
 812         }
 813         wake_up(&port->restart_wq);
 814 }
 815
 816 static void check_sqs(struct ehea_port *port)
 817 {
 818         struct ehea_swqe *swqe;
 819         int swqe_index;
 820         int i, k;
 821
 822         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 823                 struct ehea_port_res *pr = &port->port_res[i];
 824                 int ret;
 825                 k = 0;
 826                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 827                 memset(swqe, 0, SWQE_HEADER_SIZE);
 828                 atomic_dec(&pr->swqe_avail);
 829
 830                 swqe->tx_control |= EHEA_SWQE_PURGE;
 831                 swqe->wr_id = SWQE_RESTART_CHECK;
 832                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 833                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 834                 swqe->immediate_data_length = 80;
 835
 836                 ehea_post_swqe(pr->qp, swqe);
 837
 838                 ret = wait_event_timeout(port->restart_wq,
 839                                          pr->sq_restart_flag == 0,
 840                                          msecs_to_jiffies(100));
 841
 842                 if (!ret) {
 843                         pr_err("HW/SW queues out of sync\n");
 844                         ehea_schedule_port_reset(pr->port);
 845                         return;
 846                 }
 847         }
 848 }
 849
 850
 851 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 852 {
 853         struct sk_buff *skb;
 854         struct ehea_cq *send_cq = pr->send_cq;
 855         struct ehea_cqe *cqe;
 856         int quota = my_quota;
 857         int cqe_counter = 0;
 858         int swqe_av = 0;
 859         int index;
 860         unsigned long flags;
 861
 862         cqe = ehea_poll_cq(send_cq);
 863         while (cqe && (quota > 0)) {
 864                 ehea_inc_cq(send_cq);
 865
 866                 cqe_counter++;
 867                 rmb();
 868
 869                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 870                         pr->sq_restart_flag = 1;
 871                         swqe_av++;
 872                         break;
 873                 }
 874
 875                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 876                         pr_err("Bad send completion status=0x%04X\n",
 877                                cqe->status);
 878
 879                         if (netif_msg_tx_err(pr->port))
 880                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 881
 882                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 883                                 pr_err("Resetting port\n");
 884                                 ehea_schedule_port_reset(pr->port);
 885                                 break;
 886                         }
 887                 }
 888
 889                 if (netif_msg_tx_done(pr->port))
 890                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 891
 892                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 893                            == EHEA_SWQE2_TYPE)) {
 894
 895                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 896                         skb = pr->sq_skba.arr[index];
 897                         dev_kfree_skb(skb);
 898                         pr->sq_skba.arr[index] = NULL;
 899                 }
 900
 901                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 902                 quota--;
 903
 904                 cqe = ehea_poll_cq(send_cq);
 905         }
 906
 907         ehea_update_feca(send_cq, cqe_counter);
 908         atomic_add(swqe_av, &pr->swqe_avail);
 909
 910         spin_lock_irqsave(&pr->netif_queue, flags);
 911
 912         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 913                                   >= pr->swqe_refill_th)) {
 914                 netif_wake_queue(pr->port->netdev);
 915                 pr->queue_stopped = 0;
 916         }
 917         spin_unlock_irqrestore(&pr->netif_queue, flags);
 918         wake_up(&pr->port->swqe_avail_wq);
 919
 920         return cqe;
 921 }
 922
 923 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 924 #define EHEA_POLL_MAX_CQES 65535
 925
 926 static int ehea_poll(struct napi_struct *napi, int budget)
 927 {
 928         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 929                                                 napi);
 930         struct net_device *dev = pr->port->netdev;
 931         struct ehea_cqe *cqe;
 932         struct ehea_cqe *cqe_skb = NULL;
 933         int force_irq, wqe_index;
 934         int rx = 0;
 935
 936         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 937         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 938
 939         if (!force_irq)
 940                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 941
 942         while ((rx != budget) || force_irq) {
 943                 pr->poll_counter = 0;
 944                 force_irq = 0;
 945                 napi_complete(napi);
 946                 ehea_reset_cq_ep(pr->recv_cq);
 947                 ehea_reset_cq_ep(pr->send_cq);
 948                 ehea_reset_cq_n1(pr->recv_cq);
 949                 ehea_reset_cq_n1(pr->send_cq);
 950                 rmb();
 951                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 952                 cqe_skb = ehea_poll_cq(pr->send_cq);
 953
 954                 if (!cqe && !cqe_skb)
 955                         return rx;
 956
 957                 if (!napi_reschedule(napi))
 958                         return rx;
 959
 960                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 961                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 962         }
 963
 964         pr->poll_counter++;
 965         return rx;
 966 }
 967
 968 #ifdef CONFIG_NET_POLL_CONTROLLER
 969 static void ehea_netpoll(struct net_device *dev)
 970 {
 971         struct ehea_port *port = netdev_priv(dev);
 972         int i;
 973
 974         for (i = 0; i < port->num_def_qps; i++)
 975                 napi_schedule(&port->port_res[i].napi);
 976 }
 977 #endif
 978
 979 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 980 {
 981         struct ehea_port_res *pr = param;
 982
 983         napi_schedule(&pr->napi);
 984
 985         return IRQ_HANDLED;
 986 }
 987
 988 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 989 {
 990         struct ehea_port *port = param;
 991         struct ehea_eqe *eqe;
 992         struct ehea_qp *qp;
 993         u32 qp_token;
 994         u64 resource_type, aer, aerr;
 995         int reset_port = 0;
 996
 997         eqe = ehea_poll_eq(port->qp_eq);
 998
 999         while (eqe) {
1000                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1001                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1002                        eqe->entry, qp_token);
1003
1004                 qp = port->port_res[qp_token].qp;
1005
1006                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1007                                                 &aer, &aerr);
1008
1009                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1010                         if ((aer & EHEA_AER_RESET_MASK) ||
1011                             (aerr & EHEA_AERR_RESET_MASK))
1012                                  reset_port = 1;
1013                 } else
1014                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1015
1016                 eqe = ehea_poll_eq(port->qp_eq);
1017         }
1018
1019         if (reset_port) {
1020                 pr_err("Resetting port\n");
1021                 ehea_schedule_port_reset(port);
1022         }
1023
1024         return IRQ_HANDLED;
1025 }
1026
1027 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1028                                        int logical_port)
1029 {
1030         int i;
1031
1032         for (i = 0; i < EHEA_MAX_PORTS; i++)
1033                 if (adapter->port[i])
1034                         if (adapter->port[i]->logical_port_id == logical_port)
1035                                 return adapter->port[i];
1036         return NULL;
1037 }
1038
1039 int ehea_sense_port_attr(struct ehea_port *port)
1040 {
1041         int ret;
1042         u64 hret;
1043         struct hcp_ehea_port_cb0 *cb0;
1044
1045         /* may be called via ehea_neq_tasklet() */
1046         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1047         if (!cb0) {
1048                 pr_err("no mem for cb0\n");
1049                 ret = -ENOMEM;
1050                 goto out;
1051         }
1052
1053         hret = ehea_h_query_ehea_port(port->adapter->handle,
1054                                       port->logical_port_id, H_PORT_CB0,
1055                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1056                                       cb0);
1057         if (hret != H_SUCCESS) {
1058                 ret = -EIO;
1059                 goto out_free;
1060         }
1061
1062         /* MAC address */
1063         port->mac_addr = cb0->port_mac_addr << 16;
1064
1065         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1066                 ret = -EADDRNOTAVAIL;
1067                 goto out_free;
1068         }
1069
1070         /* Port speed */
1071         switch (cb0->port_speed) {
1072         case H_SPEED_10M_H:
1073                 port->port_speed = EHEA_SPEED_10M;
1074                 port->full_duplex = 0;
1075                 break;
1076         case H_SPEED_10M_F:
1077                 port->port_speed = EHEA_SPEED_10M;
1078                 port->full_duplex = 1;
1079                 break;
1080         case H_SPEED_100M_H:
1081                 port->port_speed = EHEA_SPEED_100M;
1082                 port->full_duplex = 0;
1083                 break;
1084         case H_SPEED_100M_F:
1085                 port->port_speed = EHEA_SPEED_100M;
1086                 port->full_duplex = 1;
1087                 break;
1088         case H_SPEED_1G_F:
1089                 port->port_speed = EHEA_SPEED_1G;
1090                 port->full_duplex = 1;
1091                 break;
1092         case H_SPEED_10G_F:
1093                 port->port_speed = EHEA_SPEED_10G;
1094                 port->full_duplex = 1;
1095                 break;
1096         default:
1097                 port->port_speed = 0;
1098                 port->full_duplex = 0;
1099                 break;
1100         }
1101
1102         port->autoneg = 1;
1103         port->num_mcs = cb0->num_default_qps;
1104
1105         /* Number of default QPs */
1106         if (use_mcs)
1107                 port->num_def_qps = cb0->num_default_qps;
1108         else
1109                 port->num_def_qps = 1;
1110
1111         if (!port->num_def_qps) {
1112                 ret = -EINVAL;
1113                 goto out_free;
1114         }
1115
1116         port->num_tx_qps = num_tx_qps;
1117
1118         if (port->num_def_qps >= port->num_tx_qps)
1119                 port->num_add_tx_qps = 0;
1120         else
1121                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1122
1123         ret = 0;
1124 out_free:
1125         if (ret || netif_msg_probe(port))
1126                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1127         free_page((unsigned long)cb0);
1128 out:
1129         return ret;
1130 }
1131
1132 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1133 {
1134         struct hcp_ehea_port_cb4 *cb4;
1135         u64 hret;
1136         int ret = 0;
1137
1138         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1139         if (!cb4) {
1140                 pr_err("no mem for cb4\n");
1141                 ret = -ENOMEM;
1142                 goto out;
1143         }
1144
1145         cb4->port_speed = port_speed;
1146
1147         netif_carrier_off(port->netdev);
1148
1149         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1150                                        port->logical_port_id,
1151                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1152         if (hret == H_SUCCESS) {
1153                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1154
1155                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1156                                               port->logical_port_id,
1157                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1158                                               cb4);
1159                 if (hret == H_SUCCESS) {
1160                         switch (cb4->port_speed) {
1161                         case H_SPEED_10M_H:
1162                                 port->port_speed = EHEA_SPEED_10M;
1163                                 port->full_duplex = 0;
1164                                 break;
1165                         case H_SPEED_10M_F:
1166                                 port->port_speed = EHEA_SPEED_10M;
1167                                 port->full_duplex = 1;
1168                                 break;
1169                         case H_SPEED_100M_H:
1170                                 port->port_speed = EHEA_SPEED_100M;
1171                                 port->full_duplex = 0;
1172                                 break;
1173                         case H_SPEED_100M_F:
1174                                 port->port_speed = EHEA_SPEED_100M;
1175                                 port->full_duplex = 1;
1176                                 break;
1177                         case H_SPEED_1G_F:
1178                                 port->port_speed = EHEA_SPEED_1G;
1179                                 port->full_duplex = 1;
1180                                 break;
1181                         case H_SPEED_10G_F:
1182                                 port->port_speed = EHEA_SPEED_10G;
1183                                 port->full_duplex = 1;
1184                                 break;
1185                         default:
1186                                 port->port_speed = 0;
1187                                 port->full_duplex = 0;
1188                                 break;
1189                         }
1190                 } else {
1191                         pr_err("Failed sensing port speed\n");
1192                         ret = -EIO;
1193                 }
1194         } else {
1195                 if (hret == H_AUTHORITY) {
1196                         pr_info("Hypervisor denied setting port speed\n");
1197                         ret = -EPERM;
1198                 } else {
1199                         ret = -EIO;
1200                         pr_err("Failed setting port speed\n");
1201                 }
1202         }
1203         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1204                 netif_carrier_on(port->netdev);
1205
1206         free_page((unsigned long)cb4);
1207 out:
1208         return ret;
1209 }
1210
1211 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1212 {
1213         int ret;
1214         u8 ec;
1215         u8 portnum;
1216         struct ehea_port *port;
1217         struct net_device *dev;
1218
1219         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1220         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1221         port = ehea_get_port(adapter, portnum);
1222         dev = port->netdev;
1223
1224         switch (ec) {
1225         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1226
1227                 if (!port) {
1228                         netdev_err(dev, "unknown portnum %x\n", portnum);
1229                         break;
1230                 }
1231
1232                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1233                         if (!netif_carrier_ok(dev)) {
1234                                 ret = ehea_sense_port_attr(port);
1235                                 if (ret) {
1236                                         netdev_err(dev, "failed resensing port attributes\n");
1237                                         break;
1238                                 }
1239
1240                                 netif_info(port, link, dev,
1241                                            "Logical port up: %dMbps %s Duplex\n",
1242                                            port->port_speed,
1243                                            port->full_duplex == 1 ?
1244                                            "Full" : "Half");
1245
1246                                 netif_carrier_on(dev);
1247                                 netif_wake_queue(dev);
1248                         }
1249                 } else
1250                         if (netif_carrier_ok(dev)) {
1251                                 netif_info(port, link, dev,
1252                                            "Logical port down\n");
1253                                 netif_carrier_off(dev);
1254                                 netif_stop_queue(dev);
1255                         }
1256
1257                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1258                         port->phy_link = EHEA_PHY_LINK_UP;
1259                         netif_info(port, link, dev,
1260                                    "Physical port up\n");
1261                         if (prop_carrier_state)
1262                                 netif_carrier_on(dev);
1263                 } else {
1264                         port->phy_link = EHEA_PHY_LINK_DOWN;
1265                         netif_info(port, link, dev,
1266                                    "Physical port down\n");
1267                         if (prop_carrier_state)
1268                                 netif_carrier_off(dev);
1269                 }
1270
1271                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1272                         netdev_info(dev,
1273                                     "External switch port is primary port\n");
1274                 else
1275                         netdev_info(dev,
1276                                     "External switch port is backup port\n");
1277
1278                 break;
1279         case EHEA_EC_ADAPTER_MALFUNC:
1280                 netdev_err(dev, "Adapter malfunction\n");
1281                 break;
1282         case EHEA_EC_PORT_MALFUNC:
1283                 netdev_info(dev, "Port malfunction\n");
1284                 netif_carrier_off(dev);
1285                 netif_stop_queue(dev);
1286                 break;
1287         default:
1288                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1289                 break;
1290         }
1291 }
1292
1293 static void ehea_neq_tasklet(unsigned long data)
1294 {
1295         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1296         struct ehea_eqe *eqe;
1297         u64 event_mask;
1298
1299         eqe = ehea_poll_eq(adapter->neq);
1300         pr_debug("eqe=%p\n", eqe);
1301
1302         while (eqe) {
1303                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1304                 ehea_parse_eqe(adapter, eqe->entry);
1305                 eqe = ehea_poll_eq(adapter->neq);
1306                 pr_debug("next eqe=%p\n", eqe);
1307         }
1308
1309         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1310                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1311                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1312
1313         ehea_h_reset_events(adapter->handle,
1314                             adapter->neq->fw_handle, event_mask);
1315 }
1316
1317 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1318 {
1319         struct ehea_adapter *adapter = param;
1320         tasklet_hi_schedule(&adapter->neq_tasklet);
1321         return IRQ_HANDLED;
1322 }
1323
1324
1325 static int ehea_fill_port_res(struct ehea_port_res *pr)
1326 {
1327         int ret;
1328         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1329
1330         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1331
1332         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1333
1334         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1335
1336         return ret;
1337 }
1338
1339 static int ehea_reg_interrupts(struct net_device *dev)
1340 {
1341         struct ehea_port *port = netdev_priv(dev);
1342         struct ehea_port_res *pr;
1343         int i, ret;
1344
1345
1346         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1347                  dev->name);
1348
1349         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1350                                   ehea_qp_aff_irq_handler,
1351                                   IRQF_DISABLED, port->int_aff_name, port);
1352         if (ret) {
1353                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1354                            port->qp_eq->attr.ist1);
1355                 goto out_free_qpeq;
1356         }
1357
1358         netif_info(port, ifup, dev,
1359                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1360                    port->qp_eq->attr.ist1);
1361
1362
1363         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1364                 pr = &port->port_res[i];
1365                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1366                          "%s-queue%d", dev->name, i);
1367                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1368                                           ehea_recv_irq_handler,
1369                                           IRQF_DISABLED, pr->int_send_name,
1370                                           pr);
1371                 if (ret) {
1372                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1373                                    i, pr->eq->attr.ist1);
1374                         goto out_free_req;
1375                 }
1376                 netif_info(port, ifup, dev,
1377                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1378                            pr->eq->attr.ist1, i);
1379         }
1380 out:
1381         return ret;
1382
1383
1384 out_free_req:
1385         while (--i >= 0) {
1386                 u32 ist = port->port_res[i].eq->attr.ist1;
1387                 ibmebus_free_irq(ist, &port->port_res[i]);
1388         }
1389
1390 out_free_qpeq:
1391         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1392         i = port->num_def_qps;
1393
1394         goto out;
1395
1396 }
1397
1398 static void ehea_free_interrupts(struct net_device *dev)
1399 {
1400         struct ehea_port *port = netdev_priv(dev);
1401         struct ehea_port_res *pr;
1402         int i;
1403
1404         /* send */
1405
1406         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1407                 pr = &port->port_res[i];
1408                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1409                 netif_info(port, intr, dev,
1410                            "free send irq for res %d with handle 0x%X\n",
1411                            i, pr->eq->attr.ist1);
1412         }
1413
1414         /* associated events */
1415         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1416         netif_info(port, intr, dev,
1417                    "associated event interrupt for handle 0x%X freed\n",
1418                    port->qp_eq->attr.ist1);
1419 }
1420
1421 static int ehea_configure_port(struct ehea_port *port)
1422 {
1423         int ret, i;
1424         u64 hret, mask;
1425         struct hcp_ehea_port_cb0 *cb0;
1426
1427         ret = -ENOMEM;
1428         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1429         if (!cb0)
1430                 goto out;
1431
1432         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1433                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1434                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1435                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1436                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1437                                       PXLY_RC_VLAN_FILTER)
1438                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1439
1440         for (i = 0; i < port->num_mcs; i++)
1441                 if (use_mcs)
1442                         cb0->default_qpn_arr[i] =
1443                                 port->port_res[i].qp->init_attr.qp_nr;
1444                 else
1445                         cb0->default_qpn_arr[i] =
1446                                 port->port_res[0].qp->init_attr.qp_nr;
1447
1448         if (netif_msg_ifup(port))
1449                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1450
1451         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1452              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1453
1454         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1455                                        port->logical_port_id,
1456                                        H_PORT_CB0, mask, cb0);
1457         ret = -EIO;
1458         if (hret != H_SUCCESS)
1459                 goto out_free;
1460
1461         ret = 0;
1462
1463 out_free:
1464         free_page((unsigned long)cb0);
1465 out:
1466         return ret;
1467 }
1468
1469 int ehea_gen_smrs(struct ehea_port_res *pr)
1470 {
1471         int ret;
1472         struct ehea_adapter *adapter = pr->port->adapter;
1473
1474         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1475         if (ret)
1476                 goto out;
1477
1478         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1479         if (ret)
1480                 goto out_free;
1481
1482         return 0;
1483
1484 out_free:
1485         ehea_rem_mr(&pr->send_mr);
1486 out:
1487         pr_err("Generating SMRS failed\n");
1488         return -EIO;
1489 }
1490
1491 int ehea_rem_smrs(struct ehea_port_res *pr)
1492 {
1493         if ((ehea_rem_mr(&pr->send_mr)) ||
1494             (ehea_rem_mr(&pr->recv_mr)))
1495                 return -EIO;
1496         else
1497                 return 0;
1498 }
1499
1500 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1501 {
1502         int arr_size = sizeof(void *) * max_q_entries;
1503
1504         q_skba->arr = vzalloc(arr_size);
1505         if (!q_skba->arr)
1506                 return -ENOMEM;
1507
1508         q_skba->len = max_q_entries;
1509         q_skba->index = 0;
1510         q_skba->os_skbs = 0;
1511
1512         return 0;
1513 }
1514
1515 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1516                               struct port_res_cfg *pr_cfg, int queue_token)
1517 {
1518         struct ehea_adapter *adapter = port->adapter;
1519         enum ehea_eq_type eq_type = EHEA_EQ;
1520         struct ehea_qp_init_attr *init_attr = NULL;
1521         int ret = -EIO;
1522         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1523
1524         tx_bytes = pr->tx_bytes;
1525         tx_packets = pr->tx_packets;
1526         rx_bytes = pr->rx_bytes;
1527         rx_packets = pr->rx_packets;
1528
1529         memset(pr, 0, sizeof(struct ehea_port_res));
1530
1531         pr->tx_bytes = rx_bytes;
1532         pr->tx_packets = tx_packets;
1533         pr->rx_bytes = rx_bytes;
1534         pr->rx_packets = rx_packets;
1535
1536         pr->port = port;
1537         spin_lock_init(&pr->xmit_lock);
1538         spin_lock_init(&pr->netif_queue);
1539
1540         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1541         if (!pr->eq) {
1542                 pr_err("create_eq failed (eq)\n");
1543                 goto out_free;
1544         }
1545
1546         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1547                                      pr->eq->fw_handle,
1548                                      port->logical_port_id);
1549         if (!pr->recv_cq) {
1550                 pr_err("create_cq failed (cq_recv)\n");
1551                 goto out_free;
1552         }
1553
1554         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1555                                      pr->eq->fw_handle,
1556                                      port->logical_port_id);
1557         if (!pr->send_cq) {
1558                 pr_err("create_cq failed (cq_send)\n");
1559                 goto out_free;
1560         }
1561
1562         if (netif_msg_ifup(port))
1563                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1564                         pr->send_cq->attr.act_nr_of_cqes,
1565                         pr->recv_cq->attr.act_nr_of_cqes);
1566
1567         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1568         if (!init_attr) {
1569                 ret = -ENOMEM;
1570                 pr_err("no mem for ehea_qp_init_attr\n");
1571                 goto out_free;
1572         }
1573
1574         init_attr->low_lat_rq1 = 1;
1575         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1576         init_attr->rq_count = 3;
1577         init_attr->qp_token = queue_token;
1578         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1579         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1580         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1581         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1582         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1583         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1584         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1585         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1586         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1587         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1588         init_attr->port_nr = port->logical_port_id;
1589         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1590         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1591         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1592
1593         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1594         if (!pr->qp) {
1595                 pr_err("create_qp failed\n");
1596                 ret = -EIO;
1597                 goto out_free;
1598         }
1599
1600         if (netif_msg_ifup(port))
1601                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1602                         init_attr->qp_nr,
1603                         init_attr->act_nr_send_wqes,
1604                         init_attr->act_nr_rwqes_rq1,
1605                         init_attr->act_nr_rwqes_rq2,
1606                         init_attr->act_nr_rwqes_rq3);
1607
1608         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1609
1610         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1611         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1612         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1613         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1614         if (ret)
1615                 goto out_free;
1616
1617         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1618         if (ehea_gen_smrs(pr) != 0) {
1619                 ret = -EIO;
1620                 goto out_free;
1621         }
1622
1623         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1624
1625         kfree(init_attr);
1626
1627         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1628
1629         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1630         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1631         pr->lro_mgr.lro_arr = pr->lro_desc;
1632         pr->lro_mgr.get_skb_header = get_skb_hdr;
1633         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1634         pr->lro_mgr.dev = port->netdev;
1635         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1636         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1637
1638         ret = 0;
1639         goto out;
1640
1641 out_free:
1642         kfree(init_attr);
1643         vfree(pr->sq_skba.arr);
1644         vfree(pr->rq1_skba.arr);
1645         vfree(pr->rq2_skba.arr);
1646         vfree(pr->rq3_skba.arr);
1647         ehea_destroy_qp(pr->qp);
1648         ehea_destroy_cq(pr->send_cq);
1649         ehea_destroy_cq(pr->recv_cq);
1650         ehea_destroy_eq(pr->eq);
1651 out:
1652         return ret;
1653 }
1654
1655 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1656 {
1657         int ret, i;
1658
1659         if (pr->qp)
1660                 netif_napi_del(&pr->napi);
1661
1662         ret = ehea_destroy_qp(pr->qp);
1663
1664         if (!ret) {
1665                 ehea_destroy_cq(pr->send_cq);
1666                 ehea_destroy_cq(pr->recv_cq);
1667                 ehea_destroy_eq(pr->eq);
1668
1669                 for (i = 0; i < pr->rq1_skba.len; i++)
1670                         if (pr->rq1_skba.arr[i])
1671                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1672
1673                 for (i = 0; i < pr->rq2_skba.len; i++)
1674                         if (pr->rq2_skba.arr[i])
1675                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1676
1677                 for (i = 0; i < pr->rq3_skba.len; i++)
1678                         if (pr->rq3_skba.arr[i])
1679                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1680
1681                 for (i = 0; i < pr->sq_skba.len; i++)
1682                         if (pr->sq_skba.arr[i])
1683                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1684
1685                 vfree(pr->rq1_skba.arr);
1686                 vfree(pr->rq2_skba.arr);
1687                 vfree(pr->rq3_skba.arr);
1688                 vfree(pr->sq_skba.arr);
1689                 ret = ehea_rem_smrs(pr);
1690         }
1691         return ret;
1692 }
1693
1694 /*
1695  * The write_* functions store information in swqe which is used by
1696  * the hardware to calculate the ip/tcp/udp checksum
1697  */
1698
1699 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1700                                       const struct sk_buff *skb)
1701 {
1702         swqe->ip_start = skb_network_offset(skb);
1703         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1704 }
1705
1706 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1707                                         const struct sk_buff *skb)
1708 {
1709         swqe->tcp_offset =
1710                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1711
1712         swqe->tcp_end = (u16)skb->len - 1;
1713 }
1714
1715 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1716                                         const struct sk_buff *skb)
1717 {
1718         swqe->tcp_offset =
1719                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1720
1721         swqe->tcp_end = (u16)skb->len - 1;
1722 }
1723
1724
1725 static void write_swqe2_TSO(struct sk_buff *skb,
1726                             struct ehea_swqe *swqe, u32 lkey)
1727 {
1728         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1729         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1730         int skb_data_size = skb_headlen(skb);
1731         int headersize;
1732
1733         /* Packet is TCP with TSO enabled */
1734         swqe->tx_control |= EHEA_SWQE_TSO;
1735         swqe->mss = skb_shinfo(skb)->gso_size;
1736         /* copy only eth/ip/tcp headers to immediate data and
1737          * the rest of skb->data to sg1entry
1738          */
1739         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1740
1741         skb_data_size = skb_headlen(skb);
1742
1743         if (skb_data_size >= headersize) {
1744                 /* copy immediate data */
1745                 skb_copy_from_linear_data(skb, imm_data, headersize);
1746                 swqe->immediate_data_length = headersize;
1747
1748                 if (skb_data_size > headersize) {
1749                         /* set sg1entry data */
1750                         sg1entry->l_key = lkey;
1751                         sg1entry->len = skb_data_size - headersize;
1752                         sg1entry->vaddr =
1753                                 ehea_map_vaddr(skb->data + headersize);
1754                         swqe->descriptors++;
1755                 }
1756         } else
1757                 pr_err("cannot handle fragmented headers\n");
1758 }
1759
1760 static void write_swqe2_nonTSO(struct sk_buff *skb,
1761                                struct ehea_swqe *swqe, u32 lkey)
1762 {
1763         int skb_data_size = skb_headlen(skb);
1764         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1765         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1766
1767         /* Packet is any nonTSO type
1768          *
1769          * Copy as much as possible skb->data to immediate data and
1770          * the rest to sg1entry
1771          */
1772         if (skb_data_size >= SWQE2_MAX_IMM) {
1773                 /* copy immediate data */
1774                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1775
1776                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1777
1778                 if (skb_data_size > SWQE2_MAX_IMM) {
1779                         /* copy sg1entry data */
1780                         sg1entry->l_key = lkey;
1781                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1782                         sg1entry->vaddr =
1783                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1784                         swqe->descriptors++;
1785                 }
1786         } else {
1787                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1788                 swqe->immediate_data_length = skb_data_size;
1789         }
1790 }
1791
1792 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1793                                     struct ehea_swqe *swqe, u32 lkey)
1794 {
1795         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1796         skb_frag_t *frag;
1797         int nfrags, sg1entry_contains_frag_data, i;
1798
1799         nfrags = skb_shinfo(skb)->nr_frags;
1800         sg1entry = &swqe->u.immdata_desc.sg_entry;
1801         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1802         swqe->descriptors = 0;
1803         sg1entry_contains_frag_data = 0;
1804
1805         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1806                 write_swqe2_TSO(skb, swqe, lkey);
1807         else
1808                 write_swqe2_nonTSO(skb, swqe, lkey);
1809
1810         /* write descriptors */
1811         if (nfrags > 0) {
1812                 if (swqe->descriptors == 0) {
1813                         /* sg1entry not yet used */
1814                         frag = &skb_shinfo(skb)->frags[0];
1815
1816                         /* copy sg1entry data */
1817                         sg1entry->l_key = lkey;
1818                         sg1entry->len = frag->size;
1819                         sg1entry->vaddr =
1820                                 ehea_map_vaddr(page_address(frag->page)
1821                                                + frag->page_offset);
1822                         swqe->descriptors++;
1823                         sg1entry_contains_frag_data = 1;
1824                 }
1825
1826                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1827
1828                         frag = &skb_shinfo(skb)->frags[i];
1829                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1830
1831                         sgentry->l_key = lkey;
1832                         sgentry->len = frag->size;
1833                         sgentry->vaddr =
1834                                 ehea_map_vaddr(page_address(frag->page)
1835                                                + frag->page_offset);
1836                         swqe->descriptors++;
1837                 }
1838         }
1839 }
1840
1841 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1842 {
1843         int ret = 0;
1844         u64 hret;
1845         u8 reg_type;
1846
1847         /* De/Register untagged packets */
1848         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1849         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1850                                      port->logical_port_id,
1851                                      reg_type, port->mac_addr, 0, hcallid);
1852         if (hret != H_SUCCESS) {
1853                 pr_err("%sregistering bc address failed (tagged)\n",
1854                        hcallid == H_REG_BCMC ? "" : "de");
1855                 ret = -EIO;
1856                 goto out_herr;
1857         }
1858
1859         /* De/Register VLAN packets */
1860         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1861         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1862                                      port->logical_port_id,
1863                                      reg_type, port->mac_addr, 0, hcallid);
1864         if (hret != H_SUCCESS) {
1865                 pr_err("%sregistering bc address failed (vlan)\n",
1866                        hcallid == H_REG_BCMC ? "" : "de");
1867                 ret = -EIO;
1868         }
1869 out_herr:
1870         return ret;
1871 }
1872
1873 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1874 {
1875         struct ehea_port *port = netdev_priv(dev);
1876         struct sockaddr *mac_addr = sa;
1877         struct hcp_ehea_port_cb0 *cb0;
1878         int ret;
1879         u64 hret;
1880
1881         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1882                 ret = -EADDRNOTAVAIL;
1883                 goto out;
1884         }
1885
1886         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1887         if (!cb0) {
1888                 pr_err("no mem for cb0\n");
1889                 ret = -ENOMEM;
1890                 goto out;
1891         }
1892
1893         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1894
1895         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1896
1897         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1898                                        port->logical_port_id, H_PORT_CB0,
1899                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1900         if (hret != H_SUCCESS) {
1901                 ret = -EIO;
1902                 goto out_free;
1903         }
1904
1905         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1906
1907         /* Deregister old MAC in pHYP */
1908         if (port->state == EHEA_PORT_UP) {
1909                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1910                 if (ret)
1911                         goto out_upregs;
1912         }
1913
1914         port->mac_addr = cb0->port_mac_addr << 16;
1915
1916         /* Register new MAC in pHYP */
1917         if (port->state == EHEA_PORT_UP) {
1918                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1919                 if (ret)
1920                         goto out_upregs;
1921         }
1922
1923         ret = 0;
1924
1925 out_upregs:
1926         ehea_update_bcmc_registrations();
1927 out_free:
1928         free_page((unsigned long)cb0);
1929 out:
1930         return ret;
1931 }
1932
1933 static void ehea_promiscuous_error(u64 hret, int enable)
1934 {
1935         if (hret == H_AUTHORITY)
1936                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1937                         enable == 1 ? "en" : "dis");
1938         else
1939                 pr_err("failed %sabling promiscuous mode\n",
1940                        enable == 1 ? "en" : "dis");
1941 }
1942
1943 static void ehea_promiscuous(struct net_device *dev, int enable)
1944 {
1945         struct ehea_port *port = netdev_priv(dev);
1946         struct hcp_ehea_port_cb7 *cb7;
1947         u64 hret;
1948
1949         if (enable == port->promisc)
1950                 return;
1951
1952         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1953         if (!cb7) {
1954                 pr_err("no mem for cb7\n");
1955                 goto out;
1956         }
1957
1958         /* Modify Pxs_DUCQPN in CB7 */
1959         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1960
1961         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1962                                        port->logical_port_id,
1963                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1964         if (hret) {
1965                 ehea_promiscuous_error(hret, enable);
1966                 goto out;
1967         }
1968
1969         port->promisc = enable;
1970 out:
1971         free_page((unsigned long)cb7);
1972 }
1973
1974 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1975                                      u32 hcallid)
1976 {
1977         u64 hret;
1978         u8 reg_type;
1979
1980         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1981                  | EHEA_BCMC_UNTAGGED;
1982
1983         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1984                                      port->logical_port_id,
1985                                      reg_type, mc_mac_addr, 0, hcallid);
1986         if (hret)
1987                 goto out;
1988
1989         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1990                  | EHEA_BCMC_VLANID_ALL;
1991
1992         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1993                                      port->logical_port_id,
1994                                      reg_type, mc_mac_addr, 0, hcallid);
1995 out:
1996         return hret;
1997 }
1998
1999 static int ehea_drop_multicast_list(struct net_device *dev)
2000 {
2001         struct ehea_port *port = netdev_priv(dev);
2002         struct ehea_mc_list *mc_entry = port->mc_list;
2003         struct list_head *pos;
2004         struct list_head *temp;
2005         int ret = 0;
2006         u64 hret;
2007
2008         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2009                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2010
2011                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2012                                                  H_DEREG_BCMC);
2013                 if (hret) {
2014                         pr_err("failed deregistering mcast MAC\n");
2015                         ret = -EIO;
2016                 }
2017
2018                 list_del(pos);
2019                 kfree(mc_entry);
2020         }
2021         return ret;
2022 }
2023
2024 static void ehea_allmulti(struct net_device *dev, int enable)
2025 {
2026         struct ehea_port *port = netdev_priv(dev);
2027         u64 hret;
2028
2029         if (!port->allmulti) {
2030                 if (enable) {
2031                         /* Enable ALLMULTI */
2032                         ehea_drop_multicast_list(dev);
2033                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2034                         if (!hret)
2035                                 port->allmulti = 1;
2036                         else
2037                                 netdev_err(dev,
2038                                            "failed enabling IFF_ALLMULTI\n");
2039                 }
2040         } else
2041                 if (!enable) {
2042                         /* Disable ALLMULTI */
2043                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2044                         if (!hret)
2045                                 port->allmulti = 0;
2046                         else
2047                                 netdev_err(dev,
2048                                            "failed disabling IFF_ALLMULTI\n");
2049                 }
2050 }
2051
2052 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2053 {
2054         struct ehea_mc_list *ehea_mcl_entry;
2055         u64 hret;
2056
2057         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2058         if (!ehea_mcl_entry) {
2059                 pr_err("no mem for mcl_entry\n");
2060                 return;
2061         }
2062
2063         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2064
2065         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2066
2067         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2068                                          H_REG_BCMC);
2069         if (!hret)
2070                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2071         else {
2072                 pr_err("failed registering mcast MAC\n");
2073                 kfree(ehea_mcl_entry);
2074         }
2075 }
2076
2077 static void ehea_set_multicast_list(struct net_device *dev)
2078 {
2079         struct ehea_port *port = netdev_priv(dev);
2080         struct netdev_hw_addr *ha;
2081         int ret;
2082
2083         if (port->promisc) {
2084                 ehea_promiscuous(dev, 1);
2085                 return;
2086         }
2087         ehea_promiscuous(dev, 0);
2088
2089         if (dev->flags & IFF_ALLMULTI) {
2090                 ehea_allmulti(dev, 1);
2091                 goto out;
2092         }
2093         ehea_allmulti(dev, 0);
2094
2095         if (!netdev_mc_empty(dev)) {
2096                 ret = ehea_drop_multicast_list(dev);
2097                 if (ret) {
2098                         /* Dropping the current multicast list failed.
2099                          * Enabling ALL_MULTI is the best we can do.
2100                          */
2101                         ehea_allmulti(dev, 1);
2102                 }
2103
2104                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2105                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2106                                 port->adapter->max_mc_mac);
2107                         goto out;
2108                 }
2109
2110                 netdev_for_each_mc_addr(ha, dev)
2111                         ehea_add_multicast_entry(port, ha->addr);
2112
2113         }
2114 out:
2115         ehea_update_bcmc_registrations();
2116 }
2117
2118 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2119 {
2120         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2121                 return -EINVAL;
2122         dev->mtu = new_mtu;
2123         return 0;
2124 }
2125
2126 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2127                        struct ehea_swqe *swqe, u32 lkey)
2128 {
2129         if (skb->protocol == htons(ETH_P_IP)) {
2130                 const struct iphdr *iph = ip_hdr(skb);
2131
2132                 /* IPv4 */
2133                 swqe->tx_control |= EHEA_SWQE_CRC
2134                                  | EHEA_SWQE_IP_CHECKSUM
2135                                  | EHEA_SWQE_TCP_CHECKSUM
2136                                  | EHEA_SWQE_IMM_DATA_PRESENT
2137                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2138
2139                 write_ip_start_end(swqe, skb);
2140
2141                 if (iph->protocol == IPPROTO_UDP) {
2142                         if ((iph->frag_off & IP_MF) ||
2143                             (iph->frag_off & IP_OFFSET))
2144                                 /* IP fragment, so don't change cs */
2145                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2146                         else
2147                                 write_udp_offset_end(swqe, skb);
2148                 } else if (iph->protocol == IPPROTO_TCP) {
2149                         write_tcp_offset_end(swqe, skb);
2150                 }
2151
2152                 /* icmp (big data) and ip segmentation packets (all other ip
2153                    packets) do not require any special handling */
2154
2155         } else {
2156                 /* Other Ethernet Protocol */
2157                 swqe->tx_control |= EHEA_SWQE_CRC
2158                                  | EHEA_SWQE_IMM_DATA_PRESENT
2159                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2160         }
2161
2162         write_swqe2_data(skb, dev, swqe, lkey);
2163 }
2164
2165 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2166                        struct ehea_swqe *swqe)
2167 {
2168         int nfrags = skb_shinfo(skb)->nr_frags;
2169         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2170         skb_frag_t *frag;
2171         int i;
2172
2173         if (skb->protocol == htons(ETH_P_IP)) {
2174                 const struct iphdr *iph = ip_hdr(skb);
2175
2176                 /* IPv4 */
2177                 write_ip_start_end(swqe, skb);
2178
2179                 if (iph->protocol == IPPROTO_TCP) {
2180                         swqe->tx_control |= EHEA_SWQE_CRC
2181                                          | EHEA_SWQE_IP_CHECKSUM
2182                                          | EHEA_SWQE_TCP_CHECKSUM
2183                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2184
2185                         write_tcp_offset_end(swqe, skb);
2186
2187                 } else if (iph->protocol == IPPROTO_UDP) {
2188                         if ((iph->frag_off & IP_MF) ||
2189                             (iph->frag_off & IP_OFFSET))
2190                                 /* IP fragment, so don't change cs */
2191                                 swqe->tx_control |= EHEA_SWQE_CRC
2192                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2193                         else {
2194                                 swqe->tx_control |= EHEA_SWQE_CRC
2195                                                  | EHEA_SWQE_IP_CHECKSUM
2196                                                  | EHEA_SWQE_TCP_CHECKSUM
2197                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2198
2199                                 write_udp_offset_end(swqe, skb);
2200                         }
2201                 } else {
2202                         /* icmp (big data) and
2203                            ip segmentation packets (all other ip packets) */
2204                         swqe->tx_control |= EHEA_SWQE_CRC
2205                                          | EHEA_SWQE_IP_CHECKSUM
2206                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2207                 }
2208         } else {
2209                 /* Other Ethernet Protocol */
2210                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2211         }
2212         /* copy (immediate) data */
2213         if (nfrags == 0) {
2214                 /* data is in a single piece */
2215                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2216         } else {
2217                 /* first copy data from the skb->data buffer ... */
2218                 skb_copy_from_linear_data(skb, imm_data,
2219                                           skb_headlen(skb));
2220                 imm_data += skb_headlen(skb);
2221
2222                 /* ... then copy data from the fragments */
2223                 for (i = 0; i < nfrags; i++) {
2224                         frag = &skb_shinfo(skb)->frags[i];
2225                         memcpy(imm_data,
2226                                page_address(frag->page) + frag->page_offset,
2227                                frag->size);
2228                         imm_data += frag->size;
2229                 }
2230         }
2231         swqe->immediate_data_length = skb->len;
2232         dev_kfree_skb(skb);
2233 }
2234
2235 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2236 {
2237         struct tcphdr *tcp;
2238         u32 tmp;
2239
2240         if ((skb->protocol == htons(ETH_P_IP)) &&
2241             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2242                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2243                                         (ip_hdr(skb)->ihl * 4));
2244                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2245                 tmp += ip_hdr(skb)->daddr % 31;
2246                 return tmp % num_qps;
2247         } else
2248                 return 0;
2249 }
2250
2251 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2252 {
2253         struct ehea_port *port = netdev_priv(dev);
2254         struct ehea_swqe *swqe;
2255         unsigned long flags;
2256         u32 lkey;
2257         int swqe_index;
2258         struct ehea_port_res *pr;
2259
2260         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2261
2262         if (!spin_trylock(&pr->xmit_lock))
2263                 return NETDEV_TX_BUSY;
2264
2265         if (pr->queue_stopped) {
2266                 spin_unlock(&pr->xmit_lock);
2267                 return NETDEV_TX_BUSY;
2268         }
2269
2270         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2271         memset(swqe, 0, SWQE_HEADER_SIZE);
2272         atomic_dec(&pr->swqe_avail);
2273
2274         if (vlan_tx_tag_present(skb)) {
2275                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2276                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2277         }
2278
2279         pr->tx_packets++;
2280         pr->tx_bytes += skb->len;
2281
2282         if (skb->len <= SWQE3_MAX_IMM) {
2283                 u32 sig_iv = port->sig_comp_iv;
2284                 u32 swqe_num = pr->swqe_id_counter;
2285                 ehea_xmit3(skb, dev, swqe);
2286                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2287                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2288                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2289                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2290                                                       sig_iv);
2291                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2292                         pr->swqe_ll_count = 0;
2293                 } else
2294                         pr->swqe_ll_count += 1;
2295         } else {
2296                 swqe->wr_id =
2297                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2298                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2299                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2300                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2301                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2302
2303                 pr->sq_skba.index++;
2304                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2305
2306                 lkey = pr->send_mr.lkey;
2307                 ehea_xmit2(skb, dev, swqe, lkey);
2308                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2309         }
2310         pr->swqe_id_counter += 1;
2311
2312         netif_info(port, tx_queued, dev,
2313                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2314         if (netif_msg_tx_queued(port))
2315                 ehea_dump(swqe, 512, "swqe");
2316
2317         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2318                 netif_stop_queue(dev);
2319                 swqe->tx_control |= EHEA_SWQE_PURGE;
2320         }
2321
2322         ehea_post_swqe(pr->qp, swqe);
2323
2324         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2325                 spin_lock_irqsave(&pr->netif_queue, flags);
2326                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2327                         pr->p_stats.queue_stopped++;
2328                         netif_stop_queue(dev);
2329                         pr->queue_stopped = 1;
2330                 }
2331                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2332         }
2333         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2334         spin_unlock(&pr->xmit_lock);
2335
2336         return NETDEV_TX_OK;
2337 }
2338
2339 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2340 {
2341         struct ehea_port *port = netdev_priv(dev);
2342         struct ehea_adapter *adapter = port->adapter;
2343         struct hcp_ehea_port_cb1 *cb1;
2344         int index;
2345         u64 hret;
2346
2347         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2348         if (!cb1) {
2349                 pr_err("no mem for cb1\n");
2350                 goto out;
2351         }
2352
2353         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2354                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2355         if (hret != H_SUCCESS) {
2356                 pr_err("query_ehea_port failed\n");
2357                 goto out;
2358         }
2359
2360         index = (vid / 64);
2361         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2362
2363         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2364                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2365         if (hret != H_SUCCESS)
2366                 pr_err("modify_ehea_port failed\n");
2367 out:
2368         free_page((unsigned long)cb1);
2369         return;
2370 }
2371
2372 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2373 {
2374         struct ehea_port *port = netdev_priv(dev);
2375         struct ehea_adapter *adapter = port->adapter;
2376         struct hcp_ehea_port_cb1 *cb1;
2377         int index;
2378         u64 hret;
2379
2380         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2381         if (!cb1) {
2382                 pr_err("no mem for cb1\n");
2383                 goto out;
2384         }
2385
2386         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2387                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2388         if (hret != H_SUCCESS) {
2389                 pr_err("query_ehea_port failed\n");
2390                 goto out;
2391         }
2392
2393         index = (vid / 64);
2394         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2395
2396         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2397                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2398         if (hret != H_SUCCESS)
2399                 pr_err("modify_ehea_port failed\n");
2400 out:
2401         free_page((unsigned long)cb1);
2402 }
2403
2404 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2405 {
2406         int ret = -EIO;
2407         u64 hret;
2408         u16 dummy16 = 0;
2409         u64 dummy64 = 0;
2410         struct hcp_modify_qp_cb0 *cb0;
2411
2412         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2413         if (!cb0) {
2414                 ret = -ENOMEM;
2415                 goto out;
2416         }
2417
2418         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2419                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2420         if (hret != H_SUCCESS) {
2421                 pr_err("query_ehea_qp failed (1)\n");
2422                 goto out;
2423         }
2424
2425         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2426         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2427                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2428                                      &dummy64, &dummy64, &dummy16, &dummy16);
2429         if (hret != H_SUCCESS) {
2430                 pr_err("modify_ehea_qp failed (1)\n");
2431                 goto out;
2432         }
2433
2434         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2435                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2436         if (hret != H_SUCCESS) {
2437                 pr_err("query_ehea_qp failed (2)\n");
2438                 goto out;
2439         }
2440
2441         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2442         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2443                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2444                                      &dummy64, &dummy64, &dummy16, &dummy16);
2445         if (hret != H_SUCCESS) {
2446                 pr_err("modify_ehea_qp failed (2)\n");
2447                 goto out;
2448         }
2449
2450         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2451                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2452         if (hret != H_SUCCESS) {
2453                 pr_err("query_ehea_qp failed (3)\n");
2454                 goto out;
2455         }
2456
2457         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2458         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2459                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2460                                      &dummy64, &dummy64, &dummy16, &dummy16);
2461         if (hret != H_SUCCESS) {
2462                 pr_err("modify_ehea_qp failed (3)\n");
2463                 goto out;
2464         }
2465
2466         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2467                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2468         if (hret != H_SUCCESS) {
2469                 pr_err("query_ehea_qp failed (4)\n");
2470                 goto out;
2471         }
2472
2473         ret = 0;
2474 out:
2475         free_page((unsigned long)cb0);
2476         return ret;
2477 }
2478
2479 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2480                                int add_tx_qps)
2481 {
2482         int ret, i;
2483         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2484         enum ehea_eq_type eq_type = EHEA_EQ;
2485
2486         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2487                                    EHEA_MAX_ENTRIES_EQ, 1);
2488         if (!port->qp_eq) {
2489                 ret = -EINVAL;
2490                 pr_err("ehea_create_eq failed (qp_eq)\n");
2491                 goto out_kill_eq;
2492         }
2493
2494         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2495         pr_cfg.max_entries_scq = sq_entries * 2;
2496         pr_cfg.max_entries_sq = sq_entries;
2497         pr_cfg.max_entries_rq1 = rq1_entries;
2498         pr_cfg.max_entries_rq2 = rq2_entries;
2499         pr_cfg.max_entries_rq3 = rq3_entries;
2500
2501         pr_cfg_small_rx.max_entries_rcq = 1;
2502         pr_cfg_small_rx.max_entries_scq = sq_entries;
2503         pr_cfg_small_rx.max_entries_sq = sq_entries;
2504         pr_cfg_small_rx.max_entries_rq1 = 1;
2505         pr_cfg_small_rx.max_entries_rq2 = 1;
2506         pr_cfg_small_rx.max_entries_rq3 = 1;
2507
2508         for (i = 0; i < def_qps; i++) {
2509                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2510                 if (ret)
2511                         goto out_clean_pr;
2512         }
2513         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2514                 ret = ehea_init_port_res(port, &port->port_res[i],
2515                                          &pr_cfg_small_rx, i);
2516                 if (ret)
2517                         goto out_clean_pr;
2518         }
2519
2520         return 0;
2521
2522 out_clean_pr:
2523         while (--i >= 0)
2524                 ehea_clean_portres(port, &port->port_res[i]);
2525
2526 out_kill_eq:
2527         ehea_destroy_eq(port->qp_eq);
2528         return ret;
2529 }
2530
2531 static int ehea_clean_all_portres(struct ehea_port *port)
2532 {
2533         int ret = 0;
2534         int i;
2535
2536         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2537                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2538
2539         ret |= ehea_destroy_eq(port->qp_eq);
2540
2541         return ret;
2542 }
2543
2544 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2545 {
2546         if (adapter->active_ports)
2547                 return;
2548
2549         ehea_rem_mr(&adapter->mr);
2550 }
2551
2552 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2553 {
2554         if (adapter->active_ports)
2555                 return 0;
2556
2557         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2558 }
2559
2560 static int ehea_up(struct net_device *dev)
2561 {
2562         int ret, i;
2563         struct ehea_port *port = netdev_priv(dev);
2564
2565         if (port->state == EHEA_PORT_UP)
2566                 return 0;
2567
2568         ret = ehea_port_res_setup(port, port->num_def_qps,
2569                                   port->num_add_tx_qps);
2570         if (ret) {
2571                 netdev_err(dev, "port_res_failed\n");
2572                 goto out;
2573         }
2574
2575         /* Set default QP for this port */
2576         ret = ehea_configure_port(port);
2577         if (ret) {
2578                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2579                 goto out_clean_pr;
2580         }
2581
2582         ret = ehea_reg_interrupts(dev);
2583         if (ret) {
2584                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2585                 goto out_clean_pr;
2586         }
2587
2588         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2589                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2590                 if (ret) {
2591                         netdev_err(dev, "activate_qp failed\n");
2592                         goto out_free_irqs;
2593                 }
2594         }
2595
2596         for (i = 0; i < port->num_def_qps; i++) {
2597                 ret = ehea_fill_port_res(&port->port_res[i]);
2598                 if (ret) {
2599                         netdev_err(dev, "out_free_irqs\n");
2600                         goto out_free_irqs;
2601                 }
2602         }
2603
2604         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2605         if (ret) {
2606                 ret = -EIO;
2607                 goto out_free_irqs;
2608         }
2609
2610         port->state = EHEA_PORT_UP;
2611
2612         ret = 0;
2613         goto out;
2614
2615 out_free_irqs:
2616         ehea_free_interrupts(dev);
2617
2618 out_clean_pr:
2619         ehea_clean_all_portres(port);
2620 out:
2621         if (ret)
2622                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2623
2624         ehea_update_bcmc_registrations();
2625         ehea_update_firmware_handles();
2626
2627         return ret;
2628 }
2629
2630 static void port_napi_disable(struct ehea_port *port)
2631 {
2632         int i;
2633
2634         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2635                 napi_disable(&port->port_res[i].napi);
2636 }
2637
2638 static void port_napi_enable(struct ehea_port *port)
2639 {
2640         int i;
2641
2642         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2643                 napi_enable(&port->port_res[i].napi);
2644 }
2645
2646 static int ehea_open(struct net_device *dev)
2647 {
2648         int ret;
2649         struct ehea_port *port = netdev_priv(dev);
2650
2651         mutex_lock(&port->port_lock);
2652
2653         netif_info(port, ifup, dev, "enabling port\n");
2654
2655         ret = ehea_up(dev);
2656         if (!ret) {
2657                 port_napi_enable(port);
2658                 netif_start_queue(dev);
2659         }
2660
2661         mutex_unlock(&port->port_lock);
2662         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2663
2664         return ret;
2665 }
2666
2667 static int ehea_down(struct net_device *dev)
2668 {
2669         int ret;
2670         struct ehea_port *port = netdev_priv(dev);
2671
2672         if (port->state == EHEA_PORT_DOWN)
2673                 return 0;
2674
2675         ehea_drop_multicast_list(dev);
2676         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2677
2678         ehea_free_interrupts(dev);
2679
2680         port->state = EHEA_PORT_DOWN;
2681
2682         ehea_update_bcmc_registrations();
2683
2684         ret = ehea_clean_all_portres(port);
2685         if (ret)
2686                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2687
2688         ehea_update_firmware_handles();
2689
2690         return ret;
2691 }
2692
2693 static int ehea_stop(struct net_device *dev)
2694 {
2695         int ret;
2696         struct ehea_port *port = netdev_priv(dev);
2697
2698         netif_info(port, ifdown, dev, "disabling port\n");
2699
2700         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2701         cancel_work_sync(&port->reset_task);
2702         cancel_delayed_work_sync(&port->stats_work);
2703         mutex_lock(&port->port_lock);
2704         netif_stop_queue(dev);
2705         port_napi_disable(port);
2706         ret = ehea_down(dev);
2707         mutex_unlock(&port->port_lock);
2708         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2709         return ret;
2710 }
2711
2712 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2713 {
2714         struct ehea_qp qp = *orig_qp;
2715         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2716         struct ehea_swqe *swqe;
2717         int wqe_index;
2718         int i;
2719
2720         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2721                 swqe = ehea_get_swqe(&qp, &wqe_index);
2722                 swqe->tx_control |= EHEA_SWQE_PURGE;
2723         }
2724 }
2725
2726 static void ehea_flush_sq(struct ehea_port *port)
2727 {
2728         int i;
2729
2730         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2731                 struct ehea_port_res *pr = &port->port_res[i];
2732                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2733                 int ret;
2734
2735                 ret = wait_event_timeout(port->swqe_avail_wq,
2736                          atomic_read(&pr->swqe_avail) >= swqe_max,
2737                          msecs_to_jiffies(100));
2738
2739                 if (!ret) {
2740                         pr_err("WARNING: sq not flushed completely\n");
2741                         break;
2742                 }
2743         }
2744 }
2745
2746 int ehea_stop_qps(struct net_device *dev)
2747 {
2748         struct ehea_port *port = netdev_priv(dev);
2749         struct ehea_adapter *adapter = port->adapter;
2750         struct hcp_modify_qp_cb0 *cb0;
2751         int ret = -EIO;
2752         int dret;
2753         int i;
2754         u64 hret;
2755         u64 dummy64 = 0;
2756         u16 dummy16 = 0;
2757
2758         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2759         if (!cb0) {
2760                 ret = -ENOMEM;
2761                 goto out;
2762         }
2763
2764         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2765                 struct ehea_port_res *pr =  &port->port_res[i];
2766                 struct ehea_qp *qp = pr->qp;
2767
2768                 /* Purge send queue */
2769                 ehea_purge_sq(qp);
2770
2771                 /* Disable queue pair */
2772                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2773                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2774                                             cb0);
2775                 if (hret != H_SUCCESS) {
2776                         pr_err("query_ehea_qp failed (1)\n");
2777                         goto out;
2778                 }
2779
2780                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2781                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2782
2783                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2784                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2785                                                             1), cb0, &dummy64,
2786                                              &dummy64, &dummy16, &dummy16);
2787                 if (hret != H_SUCCESS) {
2788                         pr_err("modify_ehea_qp failed (1)\n");
2789                         goto out;
2790                 }
2791
2792                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2793                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2794                                             cb0);
2795                 if (hret != H_SUCCESS) {
2796                         pr_err("query_ehea_qp failed (2)\n");
2797                         goto out;
2798                 }
2799
2800                 /* deregister shared memory regions */
2801                 dret = ehea_rem_smrs(pr);
2802                 if (dret) {
2803                         pr_err("unreg shared memory region failed\n");
2804                         goto out;
2805                 }
2806         }
2807
2808         ret = 0;
2809 out:
2810         free_page((unsigned long)cb0);
2811
2812         return ret;
2813 }
2814
2815 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2816 {
2817         struct ehea_qp qp = *orig_qp;
2818         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2819         struct ehea_rwqe *rwqe;
2820         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2821         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2822         struct sk_buff *skb;
2823         u32 lkey = pr->recv_mr.lkey;
2824
2825
2826         int i;
2827         int index;
2828
2829         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2830                 rwqe = ehea_get_next_rwqe(&qp, 2);
2831                 rwqe->sg_list[0].l_key = lkey;
2832                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2833                 skb = skba_rq2[index];
2834                 if (skb)
2835                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2836         }
2837
2838         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2839                 rwqe = ehea_get_next_rwqe(&qp, 3);
2840                 rwqe->sg_list[0].l_key = lkey;
2841                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2842                 skb = skba_rq3[index];
2843                 if (skb)
2844                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2845         }
2846 }
2847
2848 int ehea_restart_qps(struct net_device *dev)
2849 {
2850         struct ehea_port *port = netdev_priv(dev);
2851         struct ehea_adapter *adapter = port->adapter;
2852         int ret = 0;
2853         int i;
2854
2855         struct hcp_modify_qp_cb0 *cb0;
2856         u64 hret;
2857         u64 dummy64 = 0;
2858         u16 dummy16 = 0;
2859
2860         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2861         if (!cb0) {
2862                 ret = -ENOMEM;
2863                 goto out;
2864         }
2865
2866         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2867                 struct ehea_port_res *pr =  &port->port_res[i];
2868                 struct ehea_qp *qp = pr->qp;
2869
2870                 ret = ehea_gen_smrs(pr);
2871                 if (ret) {
2872                         netdev_err(dev, "creation of shared memory regions failed\n");
2873                         goto out;
2874                 }
2875
2876                 ehea_update_rqs(qp, pr);
2877
2878                 /* Enable queue pair */
2879                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2880                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2881                                             cb0);
2882                 if (hret != H_SUCCESS) {
2883                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2884                         goto out;
2885                 }
2886
2887                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2888                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2889
2890                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2891                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2892                                                             1), cb0, &dummy64,
2893                                              &dummy64, &dummy16, &dummy16);
2894                 if (hret != H_SUCCESS) {
2895                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2896                         goto out;
2897                 }
2898
2899                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2900                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2901                                             cb0);
2902                 if (hret != H_SUCCESS) {
2903                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2904                         goto out;
2905                 }
2906
2907                 /* refill entire queue */
2908                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2909                 ehea_refill_rq2(pr, 0);
2910                 ehea_refill_rq3(pr, 0);
2911         }
2912 out:
2913         free_page((unsigned long)cb0);
2914
2915         return ret;
2916 }
2917
2918 static void ehea_reset_port(struct work_struct *work)
2919 {
2920         int ret;
2921         struct ehea_port *port =
2922                 container_of(work, struct ehea_port, reset_task);
2923         struct net_device *dev = port->netdev;
2924
2925         mutex_lock(&dlpar_mem_lock);
2926         port->resets++;
2927         mutex_lock(&port->port_lock);
2928         netif_stop_queue(dev);
2929
2930         port_napi_disable(port);
2931
2932         ehea_down(dev);
2933
2934         ret = ehea_up(dev);
2935         if (ret)
2936                 goto out;
2937
2938         ehea_set_multicast_list(dev);
2939
2940         netif_info(port, timer, dev, "reset successful\n");
2941
2942         port_napi_enable(port);
2943
2944         netif_wake_queue(dev);
2945 out:
2946         mutex_unlock(&port->port_lock);
2947         mutex_unlock(&dlpar_mem_lock);
2948 }
2949
2950 static void ehea_rereg_mrs(void)
2951 {
2952         int ret, i;
2953         struct ehea_adapter *adapter;
2954
2955         pr_info("LPAR memory changed - re-initializing driver\n");
2956
2957         list_for_each_entry(adapter, &adapter_list, list)
2958                 if (adapter->active_ports) {
2959                         /* Shutdown all ports */
2960                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2961                                 struct ehea_port *port = adapter->port[i];
2962                                 struct net_device *dev;
2963
2964                                 if (!port)
2965                                         continue;
2966
2967                                 dev = port->netdev;
2968
2969                                 if (dev->flags & IFF_UP) {
2970                                         mutex_lock(&port->port_lock);
2971                                         netif_stop_queue(dev);
2972                                         ehea_flush_sq(port);
2973                                         ret = ehea_stop_qps(dev);
2974                                         if (ret) {
2975                                                 mutex_unlock(&port->port_lock);
2976                                                 goto out;
2977                                         }
2978                                         port_napi_disable(port);
2979                                         mutex_unlock(&port->port_lock);
2980                                 }
2981                                 reset_sq_restart_flag(port);
2982                         }
2983
2984                         /* Unregister old memory region */
2985                         ret = ehea_rem_mr(&adapter->mr);
2986                         if (ret) {
2987                                 pr_err("unregister MR failed - driver inoperable!\n");
2988                                 goto out;
2989                         }
2990                 }
2991
2992         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2993
2994         list_for_each_entry(adapter, &adapter_list, list)
2995                 if (adapter->active_ports) {
2996                         /* Register new memory region */
2997                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2998                         if (ret) {
2999                                 pr_err("register MR failed - driver inoperable!\n");
3000                                 goto out;
3001                         }
3002
3003                         /* Restart all ports */
3004                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3005                                 struct ehea_port *port = adapter->port[i];
3006
3007                                 if (port) {
3008                                         struct net_device *dev = port->netdev;
3009
3010                                         if (dev->flags & IFF_UP) {
3011                                                 mutex_lock(&port->port_lock);
3012                                                 ret = ehea_restart_qps(dev);
3013                                                 if (!ret) {
3014                                                         check_sqs(port);
3015                                                         port_napi_enable(port);
3016                                                         netif_wake_queue(dev);
3017                                                 } else {
3018                                                         netdev_err(dev, "Unable to restart QPS\n");
3019                                                 }
3020                                                 mutex_unlock(&port->port_lock);
3021                                         }
3022                                 }
3023                         }
3024                 }
3025         pr_info("re-initializing driver complete\n");
3026 out:
3027         return;
3028 }
3029
3030 static void ehea_tx_watchdog(struct net_device *dev)
3031 {
3032         struct ehea_port *port = netdev_priv(dev);
3033
3034         if (netif_carrier_ok(dev) &&
3035             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3036                 ehea_schedule_port_reset(port);
3037 }
3038
3039 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3040 {
3041         struct hcp_query_ehea *cb;
3042         u64 hret;
3043         int ret;
3044
3045         cb = (void *)get_zeroed_page(GFP_KERNEL);
3046         if (!cb) {
3047                 ret = -ENOMEM;
3048                 goto out;
3049         }
3050
3051         hret = ehea_h_query_ehea(adapter->handle, cb);
3052
3053         if (hret != H_SUCCESS) {
3054                 ret = -EIO;
3055                 goto out_herr;
3056         }
3057
3058         adapter->max_mc_mac = cb->max_mc_mac - 1;
3059         ret = 0;
3060
3061 out_herr:
3062         free_page((unsigned long)cb);
3063 out:
3064         return ret;
3065 }
3066
3067 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3068 {
3069         struct hcp_ehea_port_cb4 *cb4;
3070         u64 hret;
3071         int ret = 0;
3072
3073         *jumbo = 0;
3074
3075         /* (Try to) enable *jumbo frames */
3076         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3077         if (!cb4) {
3078                 pr_err("no mem for cb4\n");
3079                 ret = -ENOMEM;
3080                 goto out;
3081         } else {
3082                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3083                                               port->logical_port_id,
3084                                               H_PORT_CB4,
3085                                               H_PORT_CB4_JUMBO, cb4);
3086                 if (hret == H_SUCCESS) {
3087                         if (cb4->jumbo_frame)
3088                                 *jumbo = 1;
3089                         else {
3090                                 cb4->jumbo_frame = 1;
3091                                 hret = ehea_h_modify_ehea_port(port->adapter->
3092                                                                handle,
3093                                                                port->
3094                                                                logical_port_id,
3095                                                                H_PORT_CB4,
3096                                                                H_PORT_CB4_JUMBO,
3097                                                                cb4);
3098                                 if (hret == H_SUCCESS)
3099                                         *jumbo = 1;
3100                         }
3101                 } else
3102                         ret = -EINVAL;
3103
3104                 free_page((unsigned long)cb4);
3105         }
3106 out:
3107         return ret;
3108 }
3109
3110 static ssize_t ehea_show_port_id(struct device *dev,
3111                                  struct device_attribute *attr, char *buf)
3112 {
3113         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3114         return sprintf(buf, "%d", port->logical_port_id);
3115 }
3116
3117 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3118                    NULL);
3119
3120 static void __devinit logical_port_release(struct device *dev)
3121 {
3122         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3123         of_node_put(port->ofdev.dev.of_node);
3124 }
3125
3126 static struct device *ehea_register_port(struct ehea_port *port,
3127                                          struct device_node *dn)
3128 {
3129         int ret;
3130
3131         port->ofdev.dev.of_node = of_node_get(dn);
3132         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3133         port->ofdev.dev.bus = &ibmebus_bus_type;
3134
3135         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3136         port->ofdev.dev.release = logical_port_release;
3137
3138         ret = of_device_register(&port->ofdev);
3139         if (ret) {
3140                 pr_err("failed to register device. ret=%d\n", ret);
3141                 goto out;
3142         }
3143
3144         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3145         if (ret) {
3146                 pr_err("failed to register attributes, ret=%d\n", ret);
3147                 goto out_unreg_of_dev;
3148         }
3149
3150         return &port->ofdev.dev;
3151
3152 out_unreg_of_dev:
3153         of_device_unregister(&port->ofdev);
3154 out:
3155         return NULL;
3156 }
3157
3158 static void ehea_unregister_port(struct ehea_port *port)
3159 {
3160         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3161         of_device_unregister(&port->ofdev);
3162 }
3163
3164 static const struct net_device_ops ehea_netdev_ops = {
3165         .ndo_open               = ehea_open,
3166         .ndo_stop               = ehea_stop,
3167         .ndo_start_xmit         = ehea_start_xmit,
3168 #ifdef CONFIG_NET_POLL_CONTROLLER
3169         .ndo_poll_controller    = ehea_netpoll,
3170 #endif
3171         .ndo_get_stats          = ehea_get_stats,
3172         .ndo_set_mac_address    = ehea_set_mac_addr,
3173         .ndo_validate_addr      = eth_validate_addr,
3174         .ndo_set_rx_mode        = ehea_set_multicast_list,
3175         .ndo_change_mtu         = ehea_change_mtu,
3176         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3177         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3178         .ndo_tx_timeout         = ehea_tx_watchdog,
3179 };
3180
3181 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3182                                          u32 logical_port_id,
3183                                          struct device_node *dn)
3184 {
3185         int ret;
3186         struct net_device *dev;
3187         struct ehea_port *port;
3188         struct device *port_dev;
3189         int jumbo;
3190
3191         /* allocate memory for the port structures */
3192         dev = alloc_etherdev(sizeof(struct ehea_port));
3193
3194         if (!dev) {
3195                 pr_err("no mem for net_device\n");
3196                 ret = -ENOMEM;
3197                 goto out_err;
3198         }
3199
3200         port = netdev_priv(dev);
3201
3202         mutex_init(&port->port_lock);
3203         port->state = EHEA_PORT_DOWN;
3204         port->sig_comp_iv = sq_entries / 10;
3205
3206         port->adapter = adapter;
3207         port->netdev = dev;
3208         port->logical_port_id = logical_port_id;
3209
3210         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3211
3212         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3213         if (!port->mc_list) {
3214                 ret = -ENOMEM;
3215                 goto out_free_ethdev;
3216         }
3217
3218         INIT_LIST_HEAD(&port->mc_list->list);
3219
3220         ret = ehea_sense_port_attr(port);
3221         if (ret)
3222                 goto out_free_mc_list;
3223
3224         port_dev = ehea_register_port(port, dn);
3225         if (!port_dev)
3226                 goto out_free_mc_list;
3227
3228         SET_NETDEV_DEV(dev, port_dev);
3229
3230         /* initialize net_device structure */
3231         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3232
3233         dev->netdev_ops = &ehea_netdev_ops;
3234         ehea_set_ethtool_ops(dev);
3235
3236         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3237                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3238         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3239                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3240                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3241                       | NETIF_F_LLTX | NETIF_F_RXCSUM;
3242         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3243
3244         if (use_lro)
3245                 dev->features |= NETIF_F_LRO;
3246
3247         INIT_WORK(&port->reset_task, ehea_reset_port);
3248         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3249
3250         init_waitqueue_head(&port->swqe_avail_wq);
3251         init_waitqueue_head(&port->restart_wq);
3252
3253         memset(&port->stats, 0, sizeof(struct net_device_stats));
3254         ret = register_netdev(dev);
3255         if (ret) {
3256                 pr_err("register_netdev failed. ret=%d\n", ret);
3257                 goto out_unreg_port;
3258         }
3259
3260         port->lro_max_aggr = lro_max_aggr;
3261
3262         ret = ehea_get_jumboframe_status(port, &jumbo);
3263         if (ret)
3264                 netdev_err(dev, "failed determining jumbo frame status\n");
3265
3266         netdev_info(dev, "Jumbo frames are %sabled\n",
3267                     jumbo == 1 ? "en" : "dis");
3268
3269         adapter->active_ports++;
3270
3271         return port;
3272
3273 out_unreg_port:
3274         ehea_unregister_port(port);
3275
3276 out_free_mc_list:
3277         kfree(port->mc_list);
3278
3279 out_free_ethdev:
3280         free_netdev(dev);
3281
3282 out_err:
3283         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3284                logical_port_id, ret);
3285         return NULL;
3286 }
3287
3288 static void ehea_shutdown_single_port(struct ehea_port *port)
3289 {
3290         struct ehea_adapter *adapter = port->adapter;
3291
3292         cancel_work_sync(&port->reset_task);
3293         cancel_delayed_work_sync(&port->stats_work);
3294         unregister_netdev(port->netdev);
3295         ehea_unregister_port(port);
3296         kfree(port->mc_list);
3297         free_netdev(port->netdev);
3298         adapter->active_ports--;
3299 }
3300
3301 static int ehea_setup_ports(struct ehea_adapter *adapter)
3302 {
3303         struct device_node *lhea_dn;
3304         struct device_node *eth_dn = NULL;
3305
3306         const u32 *dn_log_port_id;
3307         int i = 0;
3308
3309         lhea_dn = adapter->ofdev->dev.of_node;
3310         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3311
3312                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3313                                                  NULL);
3314                 if (!dn_log_port_id) {
3315                         pr_err("bad device node: eth_dn name=%s\n",
3316                                eth_dn->full_name);
3317                         continue;
3318                 }
3319
3320                 if (ehea_add_adapter_mr(adapter)) {
3321                         pr_err("creating MR failed\n");
3322                         of_node_put(eth_dn);
3323                         return -EIO;
3324                 }
3325
3326                 adapter->port[i] = ehea_setup_single_port(adapter,
3327                                                           *dn_log_port_id,
3328                                                           eth_dn);
3329                 if (adapter->port[i])
3330                         netdev_info(adapter->port[i]->netdev,
3331                                     "logical port id #%d\n", *dn_log_port_id);
3332                 else
3333                         ehea_remove_adapter_mr(adapter);
3334
3335                 i++;
3336         }
3337         return 0;
3338 }
3339
3340 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3341                                            u32 logical_port_id)
3342 {
3343         struct device_node *lhea_dn;
3344         struct device_node *eth_dn = NULL;
3345         const u32 *dn_log_port_id;
3346
3347         lhea_dn = adapter->ofdev->dev.of_node;
3348         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3349
3350                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3351                                                  NULL);
3352                 if (dn_log_port_id)
3353                         if (*dn_log_port_id == logical_port_id)
3354                                 return eth_dn;
3355         }
3356
3357         return NULL;
3358 }
3359
3360 static ssize_t ehea_probe_port(struct device *dev,
3361                                struct device_attribute *attr,
3362                                const char *buf, size_t count)
3363 {
3364         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3365         struct ehea_port *port;
3366         struct device_node *eth_dn = NULL;
3367         int i;
3368
3369         u32 logical_port_id;
3370
3371         sscanf(buf, "%d", &logical_port_id);
3372
3373         port = ehea_get_port(adapter, logical_port_id);
3374
3375         if (port) {
3376                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3377                             logical_port_id);
3378                 return -EINVAL;
3379         }
3380
3381         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3382
3383         if (!eth_dn) {
3384                 pr_info("no logical port with id %d found\n", logical_port_id);
3385                 return -EINVAL;
3386         }
3387
3388         if (ehea_add_adapter_mr(adapter)) {
3389                 pr_err("creating MR failed\n");
3390                 return -EIO;
3391         }
3392
3393         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3394
3395         of_node_put(eth_dn);
3396
3397         if (port) {
3398                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3399                         if (!adapter->port[i]) {
3400                                 adapter->port[i] = port;
3401                                 break;
3402                         }
3403
3404                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3405                             logical_port_id);
3406         } else {
3407                 ehea_remove_adapter_mr(adapter);
3408                 return -EIO;
3409         }
3410
3411         return (ssize_t) count;
3412 }
3413
3414 static ssize_t ehea_remove_port(struct device *dev,
3415                                 struct device_attribute *attr,
3416                                 const char *buf, size_t count)
3417 {
3418         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3419         struct ehea_port *port;
3420         int i;
3421         u32 logical_port_id;
3422
3423         sscanf(buf, "%d", &logical_port_id);
3424
3425         port = ehea_get_port(adapter, logical_port_id);
3426
3427         if (port) {
3428                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3429                             logical_port_id);
3430
3431                 ehea_shutdown_single_port(port);
3432
3433                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3434                         if (adapter->port[i] == port) {
3435                                 adapter->port[i] = NULL;
3436                                 break;
3437                         }
3438         } else {
3439                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3440                        logical_port_id);
3441                 return -EINVAL;
3442         }
3443
3444         ehea_remove_adapter_mr(adapter);
3445
3446         return (ssize_t) count;
3447 }
3448
3449 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3450 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3451
3452 int ehea_create_device_sysfs(struct platform_device *dev)
3453 {
3454         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3455         if (ret)
3456                 goto out;
3457
3458         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3459 out:
3460         return ret;
3461 }
3462
3463 void ehea_remove_device_sysfs(struct platform_device *dev)
3464 {
3465         device_remove_file(&dev->dev, &dev_attr_probe_port);
3466         device_remove_file(&dev->dev, &dev_attr_remove_port);
3467 }
3468
3469 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3470                                         const struct of_device_id *id)
3471 {
3472         struct ehea_adapter *adapter;
3473         const u64 *adapter_handle;
3474         int ret;
3475
3476         if (!dev || !dev->dev.of_node) {
3477                 pr_err("Invalid ibmebus device probed\n");
3478                 return -EINVAL;
3479         }
3480
3481         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3482         if (!adapter) {
3483                 ret = -ENOMEM;
3484                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3485                 goto out;
3486         }
3487
3488         list_add(&adapter->list, &adapter_list);
3489
3490         adapter->ofdev = dev;
3491
3492         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3493                                          NULL);
3494         if (adapter_handle)
3495                 adapter->handle = *adapter_handle;
3496
3497         if (!adapter->handle) {
3498                 dev_err(&dev->dev, "failed getting handle for adapter"
3499                         " '%s'\n", dev->dev.of_node->full_name);
3500                 ret = -ENODEV;
3501                 goto out_free_ad;
3502         }
3503
3504         adapter->pd = EHEA_PD_ID;
3505
3506         dev_set_drvdata(&dev->dev, adapter);
3507
3508
3509         /* initialize adapter and ports */
3510         /* get adapter properties */
3511         ret = ehea_sense_adapter_attr(adapter);
3512         if (ret) {
3513                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3514                 goto out_free_ad;
3515         }
3516
3517         adapter->neq = ehea_create_eq(adapter,
3518                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3519         if (!adapter->neq) {
3520                 ret = -EIO;
3521                 dev_err(&dev->dev, "NEQ creation failed\n");
3522                 goto out_free_ad;
3523         }
3524
3525         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3526                      (unsigned long)adapter);
3527
3528         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3529                                   ehea_interrupt_neq, IRQF_DISABLED,
3530                                   "ehea_neq", adapter);
3531         if (ret) {
3532                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3533                 goto out_kill_eq;
3534         }
3535
3536         ret = ehea_create_device_sysfs(dev);
3537         if (ret)
3538                 goto out_free_irq;
3539
3540         ret = ehea_setup_ports(adapter);
3541         if (ret) {
3542                 dev_err(&dev->dev, "setup_ports failed\n");
3543                 goto out_rem_dev_sysfs;
3544         }
3545
3546         ret = 0;
3547         goto out;
3548
3549 out_rem_dev_sysfs:
3550         ehea_remove_device_sysfs(dev);
3551
3552 out_free_irq:
3553         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3554
3555 out_kill_eq:
3556         ehea_destroy_eq(adapter->neq);
3557
3558 out_free_ad:
3559         list_del(&adapter->list);
3560         kfree(adapter);
3561
3562 out:
3563         ehea_update_firmware_handles();
3564
3565         return ret;
3566 }
3567
3568 static int __devexit ehea_remove(struct platform_device *dev)
3569 {
3570         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3571         int i;
3572
3573         for (i = 0; i < EHEA_MAX_PORTS; i++)
3574                 if (adapter->port[i]) {
3575                         ehea_shutdown_single_port(adapter->port[i]);
3576                         adapter->port[i] = NULL;
3577                 }
3578
3579         ehea_remove_device_sysfs(dev);
3580
3581         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3582         tasklet_kill(&adapter->neq_tasklet);
3583
3584         ehea_destroy_eq(adapter->neq);
3585         ehea_remove_adapter_mr(adapter);
3586         list_del(&adapter->list);
3587         kfree(adapter);
3588
3589         ehea_update_firmware_handles();
3590
3591         return 0;
3592 }
3593
3594 void ehea_crash_handler(void)
3595 {
3596         int i;
3597
3598         if (ehea_fw_handles.arr)
3599                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3600                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3601                                              ehea_fw_handles.arr[i].fwh,
3602                                              FORCE_FREE);
3603
3604         if (ehea_bcmc_regs.arr)
3605                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3606                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3607                                               ehea_bcmc_regs.arr[i].port_id,
3608                                               ehea_bcmc_regs.arr[i].reg_type,
3609                                               ehea_bcmc_regs.arr[i].macaddr,
3610                                               0, H_DEREG_BCMC);
3611 }
3612
3613 static int ehea_mem_notifier(struct notifier_block *nb,
3614                              unsigned long action, void *data)
3615 {
3616         int ret = NOTIFY_BAD;
3617         struct memory_notify *arg = data;
3618
3619         mutex_lock(&dlpar_mem_lock);
3620
3621         switch (action) {
3622         case MEM_CANCEL_OFFLINE:
3623                 pr_info("memory offlining canceled");
3624                 /* Readd canceled memory block */
3625         case MEM_ONLINE:
3626                 pr_info("memory is going online");
3627                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3628                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3629                         goto out_unlock;
3630                 ehea_rereg_mrs();
3631                 break;
3632         case MEM_GOING_OFFLINE:
3633                 pr_info("memory is going offline");
3634                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3635                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3636                         goto out_unlock;
3637                 ehea_rereg_mrs();
3638                 break;
3639         default:
3640                 break;
3641         }
3642
3643         ehea_update_firmware_handles();
3644         ret = NOTIFY_OK;
3645
3646 out_unlock:
3647         mutex_unlock(&dlpar_mem_lock);
3648         return ret;
3649 }
3650
3651 static struct notifier_block ehea_mem_nb = {
3652         .notifier_call = ehea_mem_notifier,
3653 };
3654
3655 static int ehea_reboot_notifier(struct notifier_block *nb,
3656                                 unsigned long action, void *unused)
3657 {
3658         if (action == SYS_RESTART) {
3659                 pr_info("Reboot: freeing all eHEA resources\n");
3660                 ibmebus_unregister_driver(&ehea_driver);
3661         }
3662         return NOTIFY_DONE;
3663 }
3664
3665 static struct notifier_block ehea_reboot_nb = {
3666         .notifier_call = ehea_reboot_notifier,
3667 };
3668
3669 static int check_module_parm(void)
3670 {
3671         int ret = 0;
3672
3673         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3674             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3675                 pr_info("Bad parameter: rq1_entries\n");
3676                 ret = -EINVAL;
3677         }
3678         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3679             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3680                 pr_info("Bad parameter: rq2_entries\n");
3681                 ret = -EINVAL;
3682         }
3683         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3684             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3685                 pr_info("Bad parameter: rq3_entries\n");
3686                 ret = -EINVAL;
3687         }
3688         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3689             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3690                 pr_info("Bad parameter: sq_entries\n");
3691                 ret = -EINVAL;
3692         }
3693
3694         return ret;
3695 }
3696
3697 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3698                                       char *buf)
3699 {
3700         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3701 }
3702
3703 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3704                    ehea_show_capabilities, NULL);
3705
3706 int __init ehea_module_init(void)
3707 {
3708         int ret;
3709
3710         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3711
3712         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3713         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3714
3715         mutex_init(&ehea_fw_handles.lock);
3716         spin_lock_init(&ehea_bcmc_regs.lock);
3717
3718         ret = check_module_parm();
3719         if (ret)
3720                 goto out;
3721
3722         ret = ehea_create_busmap();
3723         if (ret)
3724                 goto out;
3725
3726         ret = register_reboot_notifier(&ehea_reboot_nb);
3727         if (ret)
3728                 pr_info("failed registering reboot notifier\n");
3729
3730         ret = register_memory_notifier(&ehea_mem_nb);
3731         if (ret)
3732                 pr_info("failed registering memory remove notifier\n");
3733
3734         ret = crash_shutdown_register(ehea_crash_handler);
3735         if (ret)
3736                 pr_info("failed registering crash handler\n");
3737
3738         ret = ibmebus_register_driver(&ehea_driver);
3739         if (ret) {
3740                 pr_err("failed registering eHEA device driver on ebus\n");
3741                 goto out2;
3742         }
3743
3744         ret = driver_create_file(&ehea_driver.driver,
3745                                  &driver_attr_capabilities);
3746         if (ret) {
3747                 pr_err("failed to register capabilities attribute, ret=%d\n",
3748                        ret);
3749                 goto out3;
3750         }
3751
3752         return ret;
3753
3754 out3:
3755         ibmebus_unregister_driver(&ehea_driver);
3756 out2:
3757         unregister_memory_notifier(&ehea_mem_nb);
3758         unregister_reboot_notifier(&ehea_reboot_nb);
3759         crash_shutdown_unregister(ehea_crash_handler);
3760 out:
3761         return ret;
3762 }
3763
3764 static void __exit ehea_module_exit(void)
3765 {
3766         int ret;
3767
3768         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3769         ibmebus_unregister_driver(&ehea_driver);
3770         unregister_reboot_notifier(&ehea_reboot_nb);
3771         ret = crash_shutdown_unregister(ehea_crash_handler);
3772         if (ret)
3773                 pr_info("failed unregistering crash handler\n");
3774         unregister_memory_notifier(&ehea_mem_nb);
3775         kfree(ehea_fw_handles.arr);
3776         kfree(ehea_bcmc_regs.arr);
3777         ehea_destroy_busmap();
3778 }
3779
3780 module_init(ehea_module_init);
3781 module_exit(ehea_module_exit);