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