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

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