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 = kcalloc(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 = kcalloc(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, rx_bytes = 0, tx_bytes = 0;
 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                 rx_bytes   += port->port_res[i].rx_bytes;
 359         }
 360
 361         tx_packets = 0;
 362         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 363                 tx_packets += port->port_res[i].tx_packets;
 364                 tx_bytes   += port->port_res[i].tx_bytes;
 365         }
 366
 367         stats->tx_packets = tx_packets;
 368         stats->multicast = cb2->rxmcp;
 369         stats->rx_errors = cb2->rxuerr;
 370         stats->rx_bytes = rx_bytes;
 371         stats->tx_bytes = tx_bytes;
 372         stats->rx_packets = rx_packets;
 373
 374 out_herr:
 375         free_page((unsigned long)cb2);
 376 out:
 377         return stats;
 378 }
 379
 380 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 381 {
 382         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 383         struct net_device *dev = pr->port->netdev;
 384         int max_index_mask = pr->rq1_skba.len - 1;
 385         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 386         int adder = 0;
 387         int i;
 388
 389         pr->rq1_skba.os_skbs = 0;
 390
 391         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 392                 if (nr_of_wqes > 0)
 393                         pr->rq1_skba.index = index;
 394                 pr->rq1_skba.os_skbs = fill_wqes;
 395                 return;
 396         }
 397
 398         for (i = 0; i < fill_wqes; i++) {
 399                 if (!skb_arr_rq1[index]) {
 400                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 401                                                               EHEA_L_PKT_SIZE);
 402                         if (!skb_arr_rq1[index]) {
 403                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 404                                 break;
 405                         }
 406                 }
 407                 index--;
 408                 index &= max_index_mask;
 409                 adder++;
 410         }
 411
 412         if (adder == 0)
 413                 return;
 414
 415         /* Ring doorbell */
 416         ehea_update_rq1a(pr->qp, adder);
 417 }
 418
 419 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 420 {
 421         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 422         struct net_device *dev = pr->port->netdev;
 423         int i;
 424
 425         for (i = 0; i < pr->rq1_skba.len; i++) {
 426                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 427                 if (!skb_arr_rq1[i])
 428                         break;
 429         }
 430         /* Ring doorbell */
 431         ehea_update_rq1a(pr->qp, nr_rq1a);
 432 }
 433
 434 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 435                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 436                               int num_wqes, int wqe_type, int packet_size)
 437 {
 438         struct net_device *dev = pr->port->netdev;
 439         struct ehea_qp *qp = pr->qp;
 440         struct sk_buff **skb_arr = q_skba->arr;
 441         struct ehea_rwqe *rwqe;
 442         int i, index, max_index_mask, fill_wqes;
 443         int adder = 0;
 444         int ret = 0;
 445
 446         fill_wqes = q_skba->os_skbs + num_wqes;
 447         q_skba->os_skbs = 0;
 448
 449         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 450                 q_skba->os_skbs = fill_wqes;
 451                 return ret;
 452         }
 453
 454         index = q_skba->index;
 455         max_index_mask = q_skba->len - 1;
 456         for (i = 0; i < fill_wqes; i++) {
 457                 u64 tmp_addr;
 458                 struct sk_buff *skb;
 459
 460                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 461                 if (!skb) {
 462                         q_skba->os_skbs = fill_wqes - i;
 463                         if (q_skba->os_skbs == q_skba->len - 2) {
 464                                 ehea_info("%s: rq%i ran dry - no mem for skb",
 465                                           pr->port->netdev->name, rq_nr);
 466                                 ret = -ENOMEM;
 467                         }
 468                         break;
 469                 }
 470
 471                 skb_arr[index] = skb;
 472                 tmp_addr = ehea_map_vaddr(skb->data);
 473                 if (tmp_addr == -1) {
 474                         dev_kfree_skb(skb);
 475                         q_skba->os_skbs = fill_wqes - i;
 476                         ret = 0;
 477                         break;
 478                 }
 479
 480                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 481                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 482                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 483                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 484                 rwqe->sg_list[0].vaddr = tmp_addr;
 485                 rwqe->sg_list[0].len = packet_size;
 486                 rwqe->data_segments = 1;
 487
 488                 index++;
 489                 index &= max_index_mask;
 490                 adder++;
 491         }
 492
 493         q_skba->index = index;
 494         if (adder == 0)
 495                 goto out;
 496
 497         /* Ring doorbell */
 498         iosync();
 499         if (rq_nr == 2)
 500                 ehea_update_rq2a(pr->qp, adder);
 501         else
 502                 ehea_update_rq3a(pr->qp, adder);
 503 out:
 504         return ret;
 505 }
 506
 507
 508 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 509 {
 510         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 511                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 512                                   EHEA_RQ2_PKT_SIZE);
 513 }
 514
 515
 516 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 517 {
 518         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 519                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 520                                   EHEA_MAX_PACKET_SIZE);
 521 }
 522
 523 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 524 {
 525         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 526         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 527                 return 0;
 528         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 529             (cqe->header_length == 0))
 530                 return 0;
 531         return -EINVAL;
 532 }
 533
 534 static inline void ehea_fill_skb(struct net_device *dev,
 535                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 536 {
 537         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 538
 539         skb_put(skb, length);
 540         skb->protocol = eth_type_trans(skb, dev);
 541
 542         /* The packet was not an IPV4 packet so a complemented checksum was
 543            calculated. The value is found in the Internet Checksum field. */
 544         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 545                 skb->ip_summed = CHECKSUM_COMPLETE;
 546                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 547         } else
 548                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 549 }
 550
 551 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 552                                                int arr_len,
 553                                                struct ehea_cqe *cqe)
 554 {
 555         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 556         struct sk_buff *skb;
 557         void *pref;
 558         int x;
 559
 560         x = skb_index + 1;
 561         x &= (arr_len - 1);
 562
 563         pref = skb_array[x];
 564         if (pref) {
 565                 prefetchw(pref);
 566                 prefetchw(pref + EHEA_CACHE_LINE);
 567
 568                 pref = (skb_array[x]->data);
 569                 prefetch(pref);
 570                 prefetch(pref + EHEA_CACHE_LINE);
 571                 prefetch(pref + EHEA_CACHE_LINE * 2);
 572                 prefetch(pref + EHEA_CACHE_LINE * 3);
 573         }
 574
 575         skb = skb_array[skb_index];
 576         skb_array[skb_index] = NULL;
 577         return skb;
 578 }
 579
 580 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 581                                                   int arr_len, int wqe_index)
 582 {
 583         struct sk_buff *skb;
 584         void *pref;
 585         int x;
 586
 587         x = wqe_index + 1;
 588         x &= (arr_len - 1);
 589
 590         pref = skb_array[x];
 591         if (pref) {
 592                 prefetchw(pref);
 593                 prefetchw(pref + EHEA_CACHE_LINE);
 594
 595                 pref = (skb_array[x]->data);
 596                 prefetchw(pref);
 597                 prefetchw(pref + EHEA_CACHE_LINE);
 598         }
 599
 600         skb = skb_array[wqe_index];
 601         skb_array[wqe_index] = NULL;
 602         return skb;
 603 }
 604
 605 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 606                                  struct ehea_cqe *cqe, int *processed_rq2,
 607                                  int *processed_rq3)
 608 {
 609         struct sk_buff *skb;
 610
 611         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 612                 pr->p_stats.err_tcp_cksum++;
 613         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 614                 pr->p_stats.err_ip_cksum++;
 615         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 616                 pr->p_stats.err_frame_crc++;
 617
 618         if (rq == 2) {
 619                 *processed_rq2 += 1;
 620                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 621                 dev_kfree_skb(skb);
 622         } else if (rq == 3) {
 623                 *processed_rq3 += 1;
 624                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 625                 dev_kfree_skb(skb);
 626         }
 627
 628         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 629                 if (netif_msg_rx_err(pr->port)) {
 630                         ehea_error("Critical receive error for QP %d. "
 631                                    "Resetting port.", pr->qp->init_attr.qp_nr);
 632                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 633                 }
 634                 ehea_schedule_port_reset(pr->port);
 635                 return 1;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 642                        void **tcph, u64 *hdr_flags, void *priv)
 643 {
 644         struct ehea_cqe *cqe = priv;
 645         unsigned int ip_len;
 646         struct iphdr *iph;
 647
 648         /* non tcp/udp packets */
 649         if (!cqe->header_length)
 650                 return -1;
 651
 652         /* non tcp packet */
 653         skb_reset_network_header(skb);
 654         iph = ip_hdr(skb);
 655         if (iph->protocol != IPPROTO_TCP)
 656                 return -1;
 657
 658         ip_len = ip_hdrlen(skb);
 659         skb_set_transport_header(skb, ip_len);
 660         *tcph = tcp_hdr(skb);
 661
 662         /* check if ip header and tcp header are complete */
 663         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 664                 return -1;
 665
 666         *hdr_flags = LRO_IPV4 | LRO_TCP;
 667         *iphdr = iph;
 668
 669         return 0;
 670 }
 671
 672 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 673                           struct sk_buff *skb)
 674 {
 675         int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
 676                               pr->port->vgrp);
 677
 678         if (use_lro) {
 679                 if (vlan_extracted)
 680                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 681                                                      pr->port->vgrp,
 682                                                      cqe->vlan_tag,
 683                                                      cqe);
 684                 else
 685                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 686         } else {
 687                 if (vlan_extracted)
 688                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 689                                                  cqe->vlan_tag);
 690                 else
 691                         netif_receive_skb(skb);
 692         }
 693 }
 694
 695 static int ehea_proc_rwqes(struct net_device *dev,
 696                            struct ehea_port_res *pr,
 697                            int budget)
 698 {
 699         struct ehea_port *port = pr->port;
 700         struct ehea_qp *qp = pr->qp;
 701         struct ehea_cqe *cqe;
 702         struct sk_buff *skb;
 703         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 704         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 705         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 706         int skb_arr_rq1_len = pr->rq1_skba.len;
 707         int skb_arr_rq2_len = pr->rq2_skba.len;
 708         int skb_arr_rq3_len = pr->rq3_skba.len;
 709         int processed, processed_rq1, processed_rq2, processed_rq3;
 710         u64 processed_bytes = 0;
 711         int wqe_index, last_wqe_index, rq, port_reset;
 712
 713         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 714         last_wqe_index = 0;
 715
 716         cqe = ehea_poll_rq1(qp, &wqe_index);
 717         while ((processed < budget) && cqe) {
 718                 ehea_inc_rq1(qp);
 719                 processed_rq1++;
 720                 processed++;
 721                 if (netif_msg_rx_status(port))
 722                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 723
 724                 last_wqe_index = wqe_index;
 725                 rmb();
 726                 if (!ehea_check_cqe(cqe, &rq)) {
 727                         if (rq == 1) {
 728                                 /* LL RQ1 */
 729                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 730                                                           skb_arr_rq1_len,
 731                                                           wqe_index);
 732                                 if (unlikely(!skb)) {
 733                                         if (netif_msg_rx_err(port))
 734                                                 ehea_error("LL rq1: skb=NULL");
 735
 736                                         skb = netdev_alloc_skb(dev,
 737                                                                EHEA_L_PKT_SIZE);
 738                                         if (!skb)
 739                                                 break;
 740                                 }
 741                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 742                                                  cqe->num_bytes_transfered - 4);
 743                                 ehea_fill_skb(dev, skb, cqe);
 744                         } else if (rq == 2) {
 745                                 /* RQ2 */
 746                                 skb = get_skb_by_index(skb_arr_rq2,
 747                                                        skb_arr_rq2_len, cqe);
 748                                 if (unlikely(!skb)) {
 749                                         if (netif_msg_rx_err(port))
 750                                                 ehea_error("rq2: skb=NULL");
 751                                         break;
 752                                 }
 753                                 ehea_fill_skb(dev, skb, cqe);
 754                                 processed_rq2++;
 755                         } else {
 756                                 /* RQ3 */
 757                                 skb = get_skb_by_index(skb_arr_rq3,
 758                                                        skb_arr_rq3_len, cqe);
 759                                 if (unlikely(!skb)) {
 760                                         if (netif_msg_rx_err(port))
 761                                                 ehea_error("rq3: skb=NULL");
 762                                         break;
 763                                 }
 764                                 ehea_fill_skb(dev, skb, cqe);
 765                                 processed_rq3++;
 766                         }
 767
 768                         processed_bytes += skb->len;
 769                         ehea_proc_skb(pr, cqe, skb);
 770                 } else {
 771                         pr->p_stats.poll_receive_errors++;
 772                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 773                                                            &processed_rq2,
 774                                                            &processed_rq3);
 775                         if (port_reset)
 776                                 break;
 777                 }
 778                 cqe = ehea_poll_rq1(qp, &wqe_index);
 779         }
 780         if (use_lro)
 781                 lro_flush_all(&pr->lro_mgr);
 782
 783         pr->rx_packets += processed;
 784         pr->rx_bytes += processed_bytes;
 785
 786         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 787         ehea_refill_rq2(pr, processed_rq2);
 788         ehea_refill_rq3(pr, processed_rq3);
 789
 790         return processed;
 791 }
 792
 793 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 794
 795 static void reset_sq_restart_flag(struct ehea_port *port)
 796 {
 797         int i;
 798
 799         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 800                 struct ehea_port_res *pr = &port->port_res[i];
 801                 pr->sq_restart_flag = 0;
 802         }
 803         wake_up(&port->restart_wq);
 804 }
 805
 806 static void check_sqs(struct ehea_port *port)
 807 {
 808         struct ehea_swqe *swqe;
 809         int swqe_index;
 810         int i, k;
 811
 812         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 813                 struct ehea_port_res *pr = &port->port_res[i];
 814                 int ret;
 815                 k = 0;
 816                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 817                 memset(swqe, 0, SWQE_HEADER_SIZE);
 818                 atomic_dec(&pr->swqe_avail);
 819
 820                 swqe->tx_control |= EHEA_SWQE_PURGE;
 821                 swqe->wr_id = SWQE_RESTART_CHECK;
 822                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 823                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 824                 swqe->immediate_data_length = 80;
 825
 826                 ehea_post_swqe(pr->qp, swqe);
 827
 828                 ret = wait_event_timeout(port->restart_wq,
 829                                          pr->sq_restart_flag == 0,
 830                                          msecs_to_jiffies(100));
 831
 832                 if (!ret) {
 833                         ehea_error("HW/SW queues out of sync");
 834                         ehea_schedule_port_reset(pr->port);
 835                         return;
 836                 }
 837         }
 838 }
 839
 840
 841 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 842 {
 843         struct sk_buff *skb;
 844         struct ehea_cq *send_cq = pr->send_cq;
 845         struct ehea_cqe *cqe;
 846         int quota = my_quota;
 847         int cqe_counter = 0;
 848         int swqe_av = 0;
 849         int index;
 850         unsigned long flags;
 851
 852         cqe = ehea_poll_cq(send_cq);
 853         while (cqe && (quota > 0)) {
 854                 ehea_inc_cq(send_cq);
 855
 856                 cqe_counter++;
 857                 rmb();
 858
 859                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 860                         pr->sq_restart_flag = 1;
 861                         swqe_av++;
 862                         break;
 863                 }
 864
 865                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 866                         ehea_error("Bad send completion status=0x%04X",
 867                                    cqe->status);
 868
 869                         if (netif_msg_tx_err(pr->port))
 870                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 871
 872                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 873                                 ehea_error("Resetting port");
 874                                 ehea_schedule_port_reset(pr->port);
 875                                 break;
 876                         }
 877                 }
 878
 879                 if (netif_msg_tx_done(pr->port))
 880                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 881
 882                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 883                            == EHEA_SWQE2_TYPE)) {
 884
 885                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 886                         skb = pr->sq_skba.arr[index];
 887                         dev_kfree_skb(skb);
 888                         pr->sq_skba.arr[index] = NULL;
 889                 }
 890
 891                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 892                 quota--;
 893
 894                 cqe = ehea_poll_cq(send_cq);
 895         }
 896
 897         ehea_update_feca(send_cq, cqe_counter);
 898         atomic_add(swqe_av, &pr->swqe_avail);
 899
 900         spin_lock_irqsave(&pr->netif_queue, flags);
 901
 902         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 903                                   >= pr->swqe_refill_th)) {
 904                 netif_wake_queue(pr->port->netdev);
 905                 pr->queue_stopped = 0;
 906         }
 907         spin_unlock_irqrestore(&pr->netif_queue, flags);
 908         wake_up(&pr->port->swqe_avail_wq);
 909
 910         return cqe;
 911 }
 912
 913 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 914 #define EHEA_POLL_MAX_CQES 65535
 915
 916 static int ehea_poll(struct napi_struct *napi, int budget)
 917 {
 918         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 919                                                 napi);
 920         struct net_device *dev = pr->port->netdev;
 921         struct ehea_cqe *cqe;
 922         struct ehea_cqe *cqe_skb = NULL;
 923         int force_irq, wqe_index;
 924         int rx = 0;
 925
 926         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 927         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 928
 929         if (!force_irq)
 930                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 931
 932         while ((rx != budget) || force_irq) {
 933                 pr->poll_counter = 0;
 934                 force_irq = 0;
 935                 napi_complete(napi);
 936                 ehea_reset_cq_ep(pr->recv_cq);
 937                 ehea_reset_cq_ep(pr->send_cq);
 938                 ehea_reset_cq_n1(pr->recv_cq);
 939                 ehea_reset_cq_n1(pr->send_cq);
 940                 rmb();
 941                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 942                 cqe_skb = ehea_poll_cq(pr->send_cq);
 943
 944                 if (!cqe && !cqe_skb)
 945                         return rx;
 946
 947                 if (!napi_reschedule(napi))
 948                         return rx;
 949
 950                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 951                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 952         }
 953
 954         pr->poll_counter++;
 955         return rx;
 956 }
 957
 958 #ifdef CONFIG_NET_POLL_CONTROLLER
 959 static void ehea_netpoll(struct net_device *dev)
 960 {
 961         struct ehea_port *port = netdev_priv(dev);
 962         int i;
 963
 964         for (i = 0; i < port->num_def_qps; i++)
 965                 napi_schedule(&port->port_res[i].napi);
 966 }
 967 #endif
 968
 969 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 970 {
 971         struct ehea_port_res *pr = param;
 972
 973         napi_schedule(&pr->napi);
 974
 975         return IRQ_HANDLED;
 976 }
 977
 978 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 979 {
 980         struct ehea_port *port = param;
 981         struct ehea_eqe *eqe;
 982         struct ehea_qp *qp;
 983         u32 qp_token;
 984         u64 resource_type, aer, aerr;
 985         int reset_port = 0;
 986
 987         eqe = ehea_poll_eq(port->qp_eq);
 988
 989         while (eqe) {
 990                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 991                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
 992                            eqe->entry, qp_token);
 993
 994                 qp = port->port_res[qp_token].qp;
 995
 996                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 997                                                 &aer, &aerr);
 998
 999                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1000                         if ((aer & EHEA_AER_RESET_MASK) ||
1001                             (aerr & EHEA_AERR_RESET_MASK))
1002                                  reset_port = 1;
1003                 } else
1004                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1005
1006                 eqe = ehea_poll_eq(port->qp_eq);
1007         }
1008
1009         if (reset_port) {
1010                 ehea_error("Resetting port");
1011                 ehea_schedule_port_reset(port);
1012         }
1013
1014         return IRQ_HANDLED;
1015 }
1016
1017 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1018                                        int logical_port)
1019 {
1020         int i;
1021
1022         for (i = 0; i < EHEA_MAX_PORTS; i++)
1023                 if (adapter->port[i])
1024                         if (adapter->port[i]->logical_port_id == logical_port)
1025                                 return adapter->port[i];
1026         return NULL;
1027 }
1028
1029 int ehea_sense_port_attr(struct ehea_port *port)
1030 {
1031         int ret;
1032         u64 hret;
1033         struct hcp_ehea_port_cb0 *cb0;
1034
1035         /* may be called via ehea_neq_tasklet() */
1036         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1037         if (!cb0) {
1038                 ehea_error("no mem for cb0");
1039                 ret = -ENOMEM;
1040                 goto out;
1041         }
1042
1043         hret = ehea_h_query_ehea_port(port->adapter->handle,
1044                                       port->logical_port_id, H_PORT_CB0,
1045                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1046                                       cb0);
1047         if (hret != H_SUCCESS) {
1048                 ret = -EIO;
1049                 goto out_free;
1050         }
1051
1052         /* MAC address */
1053         port->mac_addr = cb0->port_mac_addr << 16;
1054
1055         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1056                 ret = -EADDRNOTAVAIL;
1057                 goto out_free;
1058         }
1059
1060         /* Port speed */
1061         switch (cb0->port_speed) {
1062         case H_SPEED_10M_H:
1063                 port->port_speed = EHEA_SPEED_10M;
1064                 port->full_duplex = 0;
1065                 break;
1066         case H_SPEED_10M_F:
1067                 port->port_speed = EHEA_SPEED_10M;
1068                 port->full_duplex = 1;
1069                 break;
1070         case H_SPEED_100M_H:
1071                 port->port_speed = EHEA_SPEED_100M;
1072                 port->full_duplex = 0;
1073                 break;
1074         case H_SPEED_100M_F:
1075                 port->port_speed = EHEA_SPEED_100M;
1076                 port->full_duplex = 1;
1077                 break;
1078         case H_SPEED_1G_F:
1079                 port->port_speed = EHEA_SPEED_1G;
1080                 port->full_duplex = 1;
1081                 break;
1082         case H_SPEED_10G_F:
1083                 port->port_speed = EHEA_SPEED_10G;
1084                 port->full_duplex = 1;
1085                 break;
1086         default:
1087                 port->port_speed = 0;
1088                 port->full_duplex = 0;
1089                 break;
1090         }
1091
1092         port->autoneg = 1;
1093         port->num_mcs = cb0->num_default_qps;
1094
1095         /* Number of default QPs */
1096         if (use_mcs)
1097                 port->num_def_qps = cb0->num_default_qps;
1098         else
1099                 port->num_def_qps = 1;
1100
1101         if (!port->num_def_qps) {
1102                 ret = -EINVAL;
1103                 goto out_free;
1104         }
1105
1106         port->num_tx_qps = num_tx_qps;
1107
1108         if (port->num_def_qps >= port->num_tx_qps)
1109                 port->num_add_tx_qps = 0;
1110         else
1111                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1112
1113         ret = 0;
1114 out_free:
1115         if (ret || netif_msg_probe(port))
1116                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1117         free_page((unsigned long)cb0);
1118 out:
1119         return ret;
1120 }
1121
1122 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1123 {
1124         struct hcp_ehea_port_cb4 *cb4;
1125         u64 hret;
1126         int ret = 0;
1127
1128         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1129         if (!cb4) {
1130                 ehea_error("no mem for cb4");
1131                 ret = -ENOMEM;
1132                 goto out;
1133         }
1134
1135         cb4->port_speed = port_speed;
1136
1137         netif_carrier_off(port->netdev);
1138
1139         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1140                                        port->logical_port_id,
1141                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1142         if (hret == H_SUCCESS) {
1143                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1144
1145                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1146                                               port->logical_port_id,
1147                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1148                                               cb4);
1149                 if (hret == H_SUCCESS) {
1150                         switch (cb4->port_speed) {
1151                         case H_SPEED_10M_H:
1152                                 port->port_speed = EHEA_SPEED_10M;
1153                                 port->full_duplex = 0;
1154                                 break;
1155                         case H_SPEED_10M_F:
1156                                 port->port_speed = EHEA_SPEED_10M;
1157                                 port->full_duplex = 1;
1158                                 break;
1159                         case H_SPEED_100M_H:
1160                                 port->port_speed = EHEA_SPEED_100M;
1161                                 port->full_duplex = 0;
1162                                 break;
1163                         case H_SPEED_100M_F:
1164                                 port->port_speed = EHEA_SPEED_100M;
1165                                 port->full_duplex = 1;
1166                                 break;
1167                         case H_SPEED_1G_F:
1168                                 port->port_speed = EHEA_SPEED_1G;
1169                                 port->full_duplex = 1;
1170                                 break;
1171                         case H_SPEED_10G_F:
1172                                 port->port_speed = EHEA_SPEED_10G;
1173                                 port->full_duplex = 1;
1174                                 break;
1175                         default:
1176                                 port->port_speed = 0;
1177                                 port->full_duplex = 0;
1178                                 break;
1179                         }
1180                 } else {
1181                         ehea_error("Failed sensing port speed");
1182                         ret = -EIO;
1183                 }
1184         } else {
1185                 if (hret == H_AUTHORITY) {
1186                         ehea_info("Hypervisor denied setting port speed");
1187                         ret = -EPERM;
1188                 } else {
1189                         ret = -EIO;
1190                         ehea_error("Failed setting port speed");
1191                 }
1192         }
1193         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1194                 netif_carrier_on(port->netdev);
1195
1196         free_page((unsigned long)cb4);
1197 out:
1198         return ret;
1199 }
1200
1201 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1202 {
1203         int ret;
1204         u8 ec;
1205         u8 portnum;
1206         struct ehea_port *port;
1207
1208         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1209         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1210         port = ehea_get_port(adapter, portnum);
1211
1212         switch (ec) {
1213         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1214
1215                 if (!port) {
1216                         ehea_error("unknown portnum %x", portnum);
1217                         break;
1218                 }
1219
1220                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1221                         if (!netif_carrier_ok(port->netdev)) {
1222                                 ret = ehea_sense_port_attr(port);
1223                                 if (ret) {
1224                                         ehea_error("failed resensing port "
1225                                                    "attributes");
1226                                         break;
1227                                 }
1228
1229                                 if (netif_msg_link(port))
1230                                         ehea_info("%s: Logical port up: %dMbps "
1231                                                   "%s Duplex",
1232                                                   port->netdev->name,
1233                                                   port->port_speed,
1234                                                   port->full_duplex ==
1235                                                   1 ? "Full" : "Half");
1236
1237                                 netif_carrier_on(port->netdev);
1238                                 netif_wake_queue(port->netdev);
1239                         }
1240                 } else
1241                         if (netif_carrier_ok(port->netdev)) {
1242                                 if (netif_msg_link(port))
1243                                         ehea_info("%s: Logical port down",
1244                                                   port->netdev->name);
1245                                 netif_carrier_off(port->netdev);
1246                                 netif_stop_queue(port->netdev);
1247                         }
1248
1249                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1250                         port->phy_link = EHEA_PHY_LINK_UP;
1251                         if (netif_msg_link(port))
1252                                 ehea_info("%s: Physical port up",
1253                                           port->netdev->name);
1254                         if (prop_carrier_state)
1255                                 netif_carrier_on(port->netdev);
1256                 } else {
1257                         port->phy_link = EHEA_PHY_LINK_DOWN;
1258                         if (netif_msg_link(port))
1259                                 ehea_info("%s: Physical port down",
1260                                           port->netdev->name);
1261                         if (prop_carrier_state)
1262                                 netif_carrier_off(port->netdev);
1263                 }
1264
1265                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1266                         ehea_info("External switch port is primary port");
1267                 else
1268                         ehea_info("External switch port is backup port");
1269
1270                 break;
1271         case EHEA_EC_ADAPTER_MALFUNC:
1272                 ehea_error("Adapter malfunction");
1273                 break;
1274         case EHEA_EC_PORT_MALFUNC:
1275                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1276                 netif_carrier_off(port->netdev);
1277                 netif_stop_queue(port->netdev);
1278                 break;
1279         default:
1280                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1281                 break;
1282         }
1283 }
1284
1285 static void ehea_neq_tasklet(unsigned long data)
1286 {
1287         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1288         struct ehea_eqe *eqe;
1289         u64 event_mask;
1290
1291         eqe = ehea_poll_eq(adapter->neq);
1292         ehea_debug("eqe=%p", eqe);
1293
1294         while (eqe) {
1295                 ehea_debug("*eqe=%lx", eqe->entry);
1296                 ehea_parse_eqe(adapter, eqe->entry);
1297                 eqe = ehea_poll_eq(adapter->neq);
1298                 ehea_debug("next eqe=%p", eqe);
1299         }
1300
1301         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1302                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1303                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1304
1305         ehea_h_reset_events(adapter->handle,
1306                             adapter->neq->fw_handle, event_mask);
1307 }
1308
1309 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1310 {
1311         struct ehea_adapter *adapter = param;
1312         tasklet_hi_schedule(&adapter->neq_tasklet);
1313         return IRQ_HANDLED;
1314 }
1315
1316
1317 static int ehea_fill_port_res(struct ehea_port_res *pr)
1318 {
1319         int ret;
1320         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1321
1322         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1323                                - init_attr->act_nr_rwqes_rq2
1324                                - init_attr->act_nr_rwqes_rq3 - 1);
1325
1326         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1327
1328         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1329
1330         return ret;
1331 }
1332
1333 static int ehea_reg_interrupts(struct net_device *dev)
1334 {
1335         struct ehea_port *port = netdev_priv(dev);
1336         struct ehea_port_res *pr;
1337         int i, ret;
1338
1339
1340         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1341                  dev->name);
1342
1343         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1344                                   ehea_qp_aff_irq_handler,
1345                                   IRQF_DISABLED, port->int_aff_name, port);
1346         if (ret) {
1347                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1348                            "ist=%X", port->qp_eq->attr.ist1);
1349                 goto out_free_qpeq;
1350         }
1351
1352         if (netif_msg_ifup(port))
1353                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1354                           "registered", port->qp_eq->attr.ist1);
1355
1356
1357         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1358                 pr = &port->port_res[i];
1359                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1360                          "%s-queue%d", dev->name, i);
1361                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1362                                           ehea_recv_irq_handler,
1363                                           IRQF_DISABLED, pr->int_send_name,
1364                                           pr);
1365                 if (ret) {
1366                         ehea_error("failed registering irq for ehea_queue "
1367                                    "port_res_nr:%d, ist=%X", i,
1368                                    pr->eq->attr.ist1);
1369                         goto out_free_req;
1370                 }
1371                 if (netif_msg_ifup(port))
1372                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1373                                   "%d registered", pr->eq->attr.ist1, i);
1374         }
1375 out:
1376         return ret;
1377
1378
1379 out_free_req:
1380         while (--i >= 0) {
1381                 u32 ist = port->port_res[i].eq->attr.ist1;
1382                 ibmebus_free_irq(ist, &port->port_res[i]);
1383         }
1384
1385 out_free_qpeq:
1386         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1387         i = port->num_def_qps;
1388
1389         goto out;
1390
1391 }
1392
1393 static void ehea_free_interrupts(struct net_device *dev)
1394 {
1395         struct ehea_port *port = netdev_priv(dev);
1396         struct ehea_port_res *pr;
1397         int i;
1398
1399         /* send */
1400
1401         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1402                 pr = &port->port_res[i];
1403                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1404                 if (netif_msg_intr(port))
1405                         ehea_info("free send irq for res %d with handle 0x%X",
1406                                   i, pr->eq->attr.ist1);
1407         }
1408
1409         /* associated events */
1410         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1411         if (netif_msg_intr(port))
1412                 ehea_info("associated event interrupt for handle 0x%X freed",
1413                           port->qp_eq->attr.ist1);
1414 }
1415
1416 static int ehea_configure_port(struct ehea_port *port)
1417 {
1418         int ret, i;
1419         u64 hret, mask;
1420         struct hcp_ehea_port_cb0 *cb0;
1421
1422         ret = -ENOMEM;
1423         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1424         if (!cb0)
1425                 goto out;
1426
1427         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1428                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1429                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1430                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1431                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1432                                       PXLY_RC_VLAN_FILTER)
1433                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1434
1435         for (i = 0; i < port->num_mcs; i++)
1436                 if (use_mcs)
1437                         cb0->default_qpn_arr[i] =
1438                                 port->port_res[i].qp->init_attr.qp_nr;
1439                 else
1440                         cb0->default_qpn_arr[i] =
1441                                 port->port_res[0].qp->init_attr.qp_nr;
1442
1443         if (netif_msg_ifup(port))
1444                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1445
1446         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1447              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1448
1449         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1450                                        port->logical_port_id,
1451                                        H_PORT_CB0, mask, cb0);
1452         ret = -EIO;
1453         if (hret != H_SUCCESS)
1454                 goto out_free;
1455
1456         ret = 0;
1457
1458 out_free:
1459         free_page((unsigned long)cb0);
1460 out:
1461         return ret;
1462 }
1463
1464 int ehea_gen_smrs(struct ehea_port_res *pr)
1465 {
1466         int ret;
1467         struct ehea_adapter *adapter = pr->port->adapter;
1468
1469         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1470         if (ret)
1471                 goto out;
1472
1473         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1474         if (ret)
1475                 goto out_free;
1476
1477         return 0;
1478
1479 out_free:
1480         ehea_rem_mr(&pr->send_mr);
1481 out:
1482         ehea_error("Generating SMRS failed\n");
1483         return -EIO;
1484 }
1485
1486 int ehea_rem_smrs(struct ehea_port_res *pr)
1487 {
1488         if ((ehea_rem_mr(&pr->send_mr)) ||
1489             (ehea_rem_mr(&pr->recv_mr)))
1490                 return -EIO;
1491         else
1492                 return 0;
1493 }
1494
1495 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1496 {
1497         int arr_size = sizeof(void *) * max_q_entries;
1498
1499         q_skba->arr = vmalloc(arr_size);
1500         if (!q_skba->arr)
1501                 return -ENOMEM;
1502
1503         memset(q_skba->arr, 0, arr_size);
1504
1505         q_skba->len = max_q_entries;
1506         q_skba->index = 0;
1507         q_skba->os_skbs = 0;
1508
1509         return 0;
1510 }
1511
1512 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1513                               struct port_res_cfg *pr_cfg, int queue_token)
1514 {
1515         struct ehea_adapter *adapter = port->adapter;
1516         enum ehea_eq_type eq_type = EHEA_EQ;
1517         struct ehea_qp_init_attr *init_attr = NULL;
1518         int ret = -EIO;
1519         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1520
1521         tx_bytes = pr->tx_bytes;
1522         tx_packets = pr->tx_packets;
1523         rx_bytes = pr->rx_bytes;
1524         rx_packets = pr->rx_packets;
1525
1526         memset(pr, 0, sizeof(struct ehea_port_res));
1527
1528         pr->tx_bytes = rx_bytes;
1529         pr->tx_packets = tx_packets;
1530         pr->rx_bytes = rx_bytes;
1531         pr->rx_packets = rx_packets;
1532
1533         pr->port = port;
1534         spin_lock_init(&pr->xmit_lock);
1535         spin_lock_init(&pr->netif_queue);
1536
1537         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1538         if (!pr->eq) {
1539                 ehea_error("create_eq failed (eq)");
1540                 goto out_free;
1541         }
1542
1543         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1544                                      pr->eq->fw_handle,
1545                                      port->logical_port_id);
1546         if (!pr->recv_cq) {
1547                 ehea_error("create_cq failed (cq_recv)");
1548                 goto out_free;
1549         }
1550
1551         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1552                                      pr->eq->fw_handle,
1553                                      port->logical_port_id);
1554         if (!pr->send_cq) {
1555                 ehea_error("create_cq failed (cq_send)");
1556                 goto out_free;
1557         }
1558
1559         if (netif_msg_ifup(port))
1560                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1561                           pr->send_cq->attr.act_nr_of_cqes,
1562                           pr->recv_cq->attr.act_nr_of_cqes);
1563
1564         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1565         if (!init_attr) {
1566                 ret = -ENOMEM;
1567                 ehea_error("no mem for ehea_qp_init_attr");
1568                 goto out_free;
1569         }
1570
1571         init_attr->low_lat_rq1 = 1;
1572         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1573         init_attr->rq_count = 3;
1574         init_attr->qp_token = queue_token;
1575         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1576         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1577         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1578         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1579         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1580         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1581         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1582         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1583         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1584         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1585         init_attr->port_nr = port->logical_port_id;
1586         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1587         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1588         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1589
1590         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1591         if (!pr->qp) {
1592                 ehea_error("create_qp failed");
1593                 ret = -EIO;
1594                 goto out_free;
1595         }
1596
1597         if (netif_msg_ifup(port))
1598                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1599                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1600                           init_attr->act_nr_send_wqes,
1601                           init_attr->act_nr_rwqes_rq1,
1602                           init_attr->act_nr_rwqes_rq2,
1603                           init_attr->act_nr_rwqes_rq3);
1604
1605         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1606
1607         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1608         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1609         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1610         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1611         if (ret)
1612                 goto out_free;
1613
1614         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1615         if (ehea_gen_smrs(pr) != 0) {
1616                 ret = -EIO;
1617                 goto out_free;
1618         }
1619
1620         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1621
1622         kfree(init_attr);
1623
1624         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1625
1626         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1627         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1628         pr->lro_mgr.lro_arr = pr->lro_desc;
1629         pr->lro_mgr.get_skb_header = get_skb_hdr;
1630         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1631         pr->lro_mgr.dev = port->netdev;
1632         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1633         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1634
1635         ret = 0;
1636         goto out;
1637
1638 out_free:
1639         kfree(init_attr);
1640         vfree(pr->sq_skba.arr);
1641         vfree(pr->rq1_skba.arr);
1642         vfree(pr->rq2_skba.arr);
1643         vfree(pr->rq3_skba.arr);
1644         ehea_destroy_qp(pr->qp);
1645         ehea_destroy_cq(pr->send_cq);
1646         ehea_destroy_cq(pr->recv_cq);
1647         ehea_destroy_eq(pr->eq);
1648 out:
1649         return ret;
1650 }
1651
1652 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1653 {
1654         int ret, i;
1655
1656         if (pr->qp)
1657                 netif_napi_del(&pr->napi);
1658
1659         ret = ehea_destroy_qp(pr->qp);
1660
1661         if (!ret) {
1662                 ehea_destroy_cq(pr->send_cq);
1663                 ehea_destroy_cq(pr->recv_cq);
1664                 ehea_destroy_eq(pr->eq);
1665
1666                 for (i = 0; i < pr->rq1_skba.len; i++)
1667                         if (pr->rq1_skba.arr[i])
1668                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1669
1670                 for (i = 0; i < pr->rq2_skba.len; i++)
1671                         if (pr->rq2_skba.arr[i])
1672                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1673
1674                 for (i = 0; i < pr->rq3_skba.len; i++)
1675                         if (pr->rq3_skba.arr[i])
1676                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1677
1678                 for (i = 0; i < pr->sq_skba.len; i++)
1679                         if (pr->sq_skba.arr[i])
1680                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1681
1682                 vfree(pr->rq1_skba.arr);
1683                 vfree(pr->rq2_skba.arr);
1684                 vfree(pr->rq3_skba.arr);
1685                 vfree(pr->sq_skba.arr);
1686                 ret = ehea_rem_smrs(pr);
1687         }
1688         return ret;
1689 }
1690
1691 /*
1692  * The write_* functions store information in swqe which is used by
1693  * the hardware to calculate the ip/tcp/udp checksum
1694  */
1695
1696 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1697                                       const struct sk_buff *skb)
1698 {
1699         swqe->ip_start = skb_network_offset(skb);
1700         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1701 }
1702
1703 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1704                                         const struct sk_buff *skb)
1705 {
1706         swqe->tcp_offset =
1707                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1708
1709         swqe->tcp_end = (u16)skb->len - 1;
1710 }
1711
1712 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1713                                         const struct sk_buff *skb)
1714 {
1715         swqe->tcp_offset =
1716                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1717
1718         swqe->tcp_end = (u16)skb->len - 1;
1719 }
1720
1721
1722 static void write_swqe2_TSO(struct sk_buff *skb,
1723                             struct ehea_swqe *swqe, u32 lkey)
1724 {
1725         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1726         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1727         int skb_data_size = skb_headlen(skb);
1728         int headersize;
1729
1730         /* Packet is TCP with TSO enabled */
1731         swqe->tx_control |= EHEA_SWQE_TSO;
1732         swqe->mss = skb_shinfo(skb)->gso_size;
1733         /* copy only eth/ip/tcp headers to immediate data and
1734          * the rest of skb->data to sg1entry
1735          */
1736         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1737
1738         skb_data_size = skb_headlen(skb);
1739
1740         if (skb_data_size >= headersize) {
1741                 /* copy immediate data */
1742                 skb_copy_from_linear_data(skb, imm_data, headersize);
1743                 swqe->immediate_data_length = headersize;
1744
1745                 if (skb_data_size > headersize) {
1746                         /* set sg1entry data */
1747                         sg1entry->l_key = lkey;
1748                         sg1entry->len = skb_data_size - headersize;
1749                         sg1entry->vaddr =
1750                                 ehea_map_vaddr(skb->data + headersize);
1751                         swqe->descriptors++;
1752                 }
1753         } else
1754                 ehea_error("cannot handle fragmented headers");
1755 }
1756
1757 static void write_swqe2_nonTSO(struct sk_buff *skb,
1758                                struct ehea_swqe *swqe, u32 lkey)
1759 {
1760         int skb_data_size = skb_headlen(skb);
1761         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1762         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1763
1764         /* Packet is any nonTSO type
1765          *
1766          * Copy as much as possible skb->data to immediate data and
1767          * the rest to sg1entry
1768          */
1769         if (skb_data_size >= SWQE2_MAX_IMM) {
1770                 /* copy immediate data */
1771                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1772
1773                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1774
1775                 if (skb_data_size > SWQE2_MAX_IMM) {
1776                         /* copy sg1entry data */
1777                         sg1entry->l_key = lkey;
1778                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1779                         sg1entry->vaddr =
1780                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1781                         swqe->descriptors++;
1782                 }
1783         } else {
1784                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1785                 swqe->immediate_data_length = skb_data_size;
1786         }
1787 }
1788
1789 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1790                                     struct ehea_swqe *swqe, u32 lkey)
1791 {
1792         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1793         skb_frag_t *frag;
1794         int nfrags, sg1entry_contains_frag_data, i;
1795
1796         nfrags = skb_shinfo(skb)->nr_frags;
1797         sg1entry = &swqe->u.immdata_desc.sg_entry;
1798         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1799         swqe->descriptors = 0;
1800         sg1entry_contains_frag_data = 0;
1801
1802         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1803                 write_swqe2_TSO(skb, swqe, lkey);
1804         else
1805                 write_swqe2_nonTSO(skb, swqe, lkey);
1806
1807         /* write descriptors */
1808         if (nfrags > 0) {
1809                 if (swqe->descriptors == 0) {
1810                         /* sg1entry not yet used */
1811                         frag = &skb_shinfo(skb)->frags[0];
1812
1813                         /* copy sg1entry data */
1814                         sg1entry->l_key = lkey;
1815                         sg1entry->len = frag->size;
1816                         sg1entry->vaddr =
1817                                 ehea_map_vaddr(page_address(frag->page)
1818                                                + frag->page_offset);
1819                         swqe->descriptors++;
1820                         sg1entry_contains_frag_data = 1;
1821                 }
1822
1823                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1824
1825                         frag = &skb_shinfo(skb)->frags[i];
1826                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1827
1828                         sgentry->l_key = lkey;
1829                         sgentry->len = frag->size;
1830                         sgentry->vaddr =
1831                                 ehea_map_vaddr(page_address(frag->page)
1832                                                + frag->page_offset);
1833                         swqe->descriptors++;
1834                 }
1835         }
1836 }
1837
1838 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1839 {
1840         int ret = 0;
1841         u64 hret;
1842         u8 reg_type;
1843
1844         /* De/Register untagged packets */
1845         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1846         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1847                                      port->logical_port_id,
1848                                      reg_type, port->mac_addr, 0, hcallid);
1849         if (hret != H_SUCCESS) {
1850                 ehea_error("%sregistering bc address failed (tagged)",
1851                            hcallid == H_REG_BCMC ? "" : "de");
1852                 ret = -EIO;
1853                 goto out_herr;
1854         }
1855
1856         /* De/Register VLAN packets */
1857         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1858         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1859                                      port->logical_port_id,
1860                                      reg_type, port->mac_addr, 0, hcallid);
1861         if (hret != H_SUCCESS) {
1862                 ehea_error("%sregistering bc address failed (vlan)",
1863                            hcallid == H_REG_BCMC ? "" : "de");
1864                 ret = -EIO;
1865         }
1866 out_herr:
1867         return ret;
1868 }
1869
1870 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1871 {
1872         struct ehea_port *port = netdev_priv(dev);
1873         struct sockaddr *mac_addr = sa;
1874         struct hcp_ehea_port_cb0 *cb0;
1875         int ret;
1876         u64 hret;
1877
1878         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1879                 ret = -EADDRNOTAVAIL;
1880                 goto out;
1881         }
1882
1883         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1884         if (!cb0) {
1885                 ehea_error("no mem for cb0");
1886                 ret = -ENOMEM;
1887                 goto out;
1888         }
1889
1890         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1891
1892         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1893
1894         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1895                                        port->logical_port_id, H_PORT_CB0,
1896                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1897         if (hret != H_SUCCESS) {
1898                 ret = -EIO;
1899                 goto out_free;
1900         }
1901
1902         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1903
1904         /* Deregister old MAC in pHYP */
1905         if (port->state == EHEA_PORT_UP) {
1906                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1907                 if (ret)
1908                         goto out_upregs;
1909         }
1910
1911         port->mac_addr = cb0->port_mac_addr << 16;
1912
1913         /* Register new MAC in pHYP */
1914         if (port->state == EHEA_PORT_UP) {
1915                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1916                 if (ret)
1917                         goto out_upregs;
1918         }
1919
1920         ret = 0;
1921
1922 out_upregs:
1923         ehea_update_bcmc_registrations();
1924 out_free:
1925         free_page((unsigned long)cb0);
1926 out:
1927         return ret;
1928 }
1929
1930 static void ehea_promiscuous_error(u64 hret, int enable)
1931 {
1932         if (hret == H_AUTHORITY)
1933                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1934                           enable == 1 ? "en" : "dis");
1935         else
1936                 ehea_error("failed %sabling promiscuous mode",
1937                            enable == 1 ? "en" : "dis");
1938 }
1939
1940 static void ehea_promiscuous(struct net_device *dev, int enable)
1941 {
1942         struct ehea_port *port = netdev_priv(dev);
1943         struct hcp_ehea_port_cb7 *cb7;
1944         u64 hret;
1945
1946         if (enable == port->promisc)
1947                 return;
1948
1949         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1950         if (!cb7) {
1951                 ehea_error("no mem for cb7");
1952                 goto out;
1953         }
1954
1955         /* Modify Pxs_DUCQPN in CB7 */
1956         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1957
1958         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1959                                        port->logical_port_id,
1960                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1961         if (hret) {
1962                 ehea_promiscuous_error(hret, enable);
1963                 goto out;
1964         }
1965
1966         port->promisc = enable;
1967 out:
1968         free_page((unsigned long)cb7);
1969 }
1970
1971 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1972                                      u32 hcallid)
1973 {
1974         u64 hret;
1975         u8 reg_type;
1976
1977         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1978                  | EHEA_BCMC_UNTAGGED;
1979
1980         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1981                                      port->logical_port_id,
1982                                      reg_type, mc_mac_addr, 0, hcallid);
1983         if (hret)
1984                 goto out;
1985
1986         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1987                  | EHEA_BCMC_VLANID_ALL;
1988
1989         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1990                                      port->logical_port_id,
1991                                      reg_type, mc_mac_addr, 0, hcallid);
1992 out:
1993         return hret;
1994 }
1995
1996 static int ehea_drop_multicast_list(struct net_device *dev)
1997 {
1998         struct ehea_port *port = netdev_priv(dev);
1999         struct ehea_mc_list *mc_entry = port->mc_list;
2000         struct list_head *pos;
2001         struct list_head *temp;
2002         int ret = 0;
2003         u64 hret;
2004
2005         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2006                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2007
2008                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2009                                                  H_DEREG_BCMC);
2010                 if (hret) {
2011                         ehea_error("failed deregistering mcast MAC");
2012                         ret = -EIO;
2013                 }
2014
2015                 list_del(pos);
2016                 kfree(mc_entry);
2017         }
2018         return ret;
2019 }
2020
2021 static void ehea_allmulti(struct net_device *dev, int enable)
2022 {
2023         struct ehea_port *port = netdev_priv(dev);
2024         u64 hret;
2025
2026         if (!port->allmulti) {
2027                 if (enable) {
2028                         /* Enable ALLMULTI */
2029                         ehea_drop_multicast_list(dev);
2030                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2031                         if (!hret)
2032                                 port->allmulti = 1;
2033                         else
2034                                 ehea_error("failed enabling IFF_ALLMULTI");
2035                 }
2036         } else
2037                 if (!enable) {
2038                         /* Disable ALLMULTI */
2039                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2040                         if (!hret)
2041                                 port->allmulti = 0;
2042                         else
2043                                 ehea_error("failed disabling IFF_ALLMULTI");
2044                 }
2045 }
2046
2047 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2048 {
2049         struct ehea_mc_list *ehea_mcl_entry;
2050         u64 hret;
2051
2052         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2053         if (!ehea_mcl_entry) {
2054                 ehea_error("no mem for mcl_entry");
2055                 return;
2056         }
2057
2058         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2059
2060         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2061
2062         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2063                                          H_REG_BCMC);
2064         if (!hret)
2065                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2066         else {
2067                 ehea_error("failed registering mcast MAC");
2068                 kfree(ehea_mcl_entry);
2069         }
2070 }
2071
2072 static void ehea_set_multicast_list(struct net_device *dev)
2073 {
2074         struct ehea_port *port = netdev_priv(dev);
2075         struct netdev_hw_addr *ha;
2076         int ret;
2077
2078         if (dev->flags & IFF_PROMISC) {
2079                 ehea_promiscuous(dev, 1);
2080                 return;
2081         }
2082         ehea_promiscuous(dev, 0);
2083
2084         if (dev->flags & IFF_ALLMULTI) {
2085                 ehea_allmulti(dev, 1);
2086                 goto out;
2087         }
2088         ehea_allmulti(dev, 0);
2089
2090         if (!netdev_mc_empty(dev)) {
2091                 ret = ehea_drop_multicast_list(dev);
2092                 if (ret) {
2093                         /* Dropping the current multicast list failed.
2094                          * Enabling ALL_MULTI is the best we can do.
2095                          */
2096                         ehea_allmulti(dev, 1);
2097                 }
2098
2099                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2100                         ehea_info("Mcast registration limit reached (0x%llx). "
2101                                   "Use ALLMULTI!",
2102                                   port->adapter->max_mc_mac);
2103                         goto out;
2104                 }
2105
2106                 netdev_for_each_mc_addr(ha, dev)
2107                         ehea_add_multicast_entry(port, ha->addr);
2108
2109         }
2110 out:
2111         ehea_update_bcmc_registrations();
2112 }
2113
2114 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2115 {
2116         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2117                 return -EINVAL;
2118         dev->mtu = new_mtu;
2119         return 0;
2120 }
2121
2122 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2123                        struct ehea_swqe *swqe, u32 lkey)
2124 {
2125         if (skb->protocol == htons(ETH_P_IP)) {
2126                 const struct iphdr *iph = ip_hdr(skb);
2127
2128                 /* IPv4 */
2129                 swqe->tx_control |= EHEA_SWQE_CRC
2130                                  | EHEA_SWQE_IP_CHECKSUM
2131                                  | EHEA_SWQE_TCP_CHECKSUM
2132                                  | EHEA_SWQE_IMM_DATA_PRESENT
2133                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2134
2135                 write_ip_start_end(swqe, skb);
2136
2137                 if (iph->protocol == IPPROTO_UDP) {
2138                         if ((iph->frag_off & IP_MF) ||
2139                             (iph->frag_off & IP_OFFSET))
2140                                 /* IP fragment, so don't change cs */
2141                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2142                         else
2143                                 write_udp_offset_end(swqe, skb);
2144                 } else if (iph->protocol == IPPROTO_TCP) {
2145                         write_tcp_offset_end(swqe, skb);
2146                 }
2147
2148                 /* icmp (big data) and ip segmentation packets (all other ip
2149                    packets) do not require any special handling */
2150
2151         } else {
2152                 /* Other Ethernet Protocol */
2153                 swqe->tx_control |= EHEA_SWQE_CRC
2154                                  | EHEA_SWQE_IMM_DATA_PRESENT
2155                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2156         }
2157
2158         write_swqe2_data(skb, dev, swqe, lkey);
2159 }
2160
2161 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2162                        struct ehea_swqe *swqe)
2163 {
2164         int nfrags = skb_shinfo(skb)->nr_frags;
2165         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2166         skb_frag_t *frag;
2167         int i;
2168
2169         if (skb->protocol == htons(ETH_P_IP)) {
2170                 const struct iphdr *iph = ip_hdr(skb);
2171
2172                 /* IPv4 */
2173                 write_ip_start_end(swqe, skb);
2174
2175                 if (iph->protocol == IPPROTO_TCP) {
2176                         swqe->tx_control |= EHEA_SWQE_CRC
2177                                          | EHEA_SWQE_IP_CHECKSUM
2178                                          | EHEA_SWQE_TCP_CHECKSUM
2179                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2180
2181                         write_tcp_offset_end(swqe, skb);
2182
2183                 } else if (iph->protocol == IPPROTO_UDP) {
2184                         if ((iph->frag_off & IP_MF) ||
2185                             (iph->frag_off & IP_OFFSET))
2186                                 /* IP fragment, so don't change cs */
2187                                 swqe->tx_control |= EHEA_SWQE_CRC
2188                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2189                         else {
2190                                 swqe->tx_control |= EHEA_SWQE_CRC
2191                                                  | EHEA_SWQE_IP_CHECKSUM
2192                                                  | EHEA_SWQE_TCP_CHECKSUM
2193                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2194
2195                                 write_udp_offset_end(swqe, skb);
2196                         }
2197                 } else {
2198                         /* icmp (big data) and
2199                            ip segmentation packets (all other ip packets) */
2200                         swqe->tx_control |= EHEA_SWQE_CRC
2201                                          | EHEA_SWQE_IP_CHECKSUM
2202                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2203                 }
2204         } else {
2205                 /* Other Ethernet Protocol */
2206                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2207         }
2208         /* copy (immediate) data */
2209         if (nfrags == 0) {
2210                 /* data is in a single piece */
2211                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2212         } else {
2213                 /* first copy data from the skb->data buffer ... */
2214                 skb_copy_from_linear_data(skb, imm_data,
2215                                           skb_headlen(skb));
2216                 imm_data += skb_headlen(skb);
2217
2218                 /* ... then copy data from the fragments */
2219                 for (i = 0; i < nfrags; i++) {
2220                         frag = &skb_shinfo(skb)->frags[i];
2221                         memcpy(imm_data,
2222                                page_address(frag->page) + frag->page_offset,
2223                                frag->size);
2224                         imm_data += frag->size;
2225                 }
2226         }
2227         swqe->immediate_data_length = skb->len;
2228         dev_kfree_skb(skb);
2229 }
2230
2231 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2232 {
2233         struct tcphdr *tcp;
2234         u32 tmp;
2235
2236         if ((skb->protocol == htons(ETH_P_IP)) &&
2237             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2238                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2239                                         (ip_hdr(skb)->ihl * 4));
2240                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2241                 tmp += ip_hdr(skb)->daddr % 31;
2242                 return tmp % num_qps;
2243         } else
2244                 return 0;
2245 }
2246
2247 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2248 {
2249         struct ehea_port *port = netdev_priv(dev);
2250         struct ehea_swqe *swqe;
2251         unsigned long flags;
2252         u32 lkey;
2253         int swqe_index;
2254         struct ehea_port_res *pr;
2255
2256         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2257
2258         if (!spin_trylock(&pr->xmit_lock))
2259                 return NETDEV_TX_BUSY;
2260
2261         if (pr->queue_stopped) {
2262                 spin_unlock(&pr->xmit_lock);
2263                 return NETDEV_TX_BUSY;
2264         }
2265
2266         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2267         memset(swqe, 0, SWQE_HEADER_SIZE);
2268         atomic_dec(&pr->swqe_avail);
2269
2270         if (vlan_tx_tag_present(skb)) {
2271                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2272                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2273         }
2274
2275         pr->tx_packets++;
2276         pr->tx_bytes += skb->len;
2277
2278         if (skb->len <= SWQE3_MAX_IMM) {
2279                 u32 sig_iv = port->sig_comp_iv;
2280                 u32 swqe_num = pr->swqe_id_counter;
2281                 ehea_xmit3(skb, dev, swqe);
2282                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2283                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2284                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2285                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2286                                                       sig_iv);
2287                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2288                         pr->swqe_ll_count = 0;
2289                 } else
2290                         pr->swqe_ll_count += 1;
2291         } else {
2292                 swqe->wr_id =
2293                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2294                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2295                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2296                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2297                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2298
2299                 pr->sq_skba.index++;
2300                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2301
2302                 lkey = pr->send_mr.lkey;
2303                 ehea_xmit2(skb, dev, swqe, lkey);
2304                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2305         }
2306         pr->swqe_id_counter += 1;
2307
2308         if (netif_msg_tx_queued(port)) {
2309                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2310                 ehea_dump(swqe, 512, "swqe");
2311         }
2312
2313         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2314                 netif_stop_queue(dev);
2315                 swqe->tx_control |= EHEA_SWQE_PURGE;
2316         }
2317
2318         ehea_post_swqe(pr->qp, swqe);
2319
2320         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2321                 spin_lock_irqsave(&pr->netif_queue, flags);
2322                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2323                         pr->p_stats.queue_stopped++;
2324                         netif_stop_queue(dev);
2325                         pr->queue_stopped = 1;
2326                 }
2327                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2328         }
2329         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2330         spin_unlock(&pr->xmit_lock);
2331
2332         return NETDEV_TX_OK;
2333 }
2334
2335 static void ehea_vlan_rx_register(struct net_device *dev,
2336                                   struct vlan_group *grp)
2337 {
2338         struct ehea_port *port = netdev_priv(dev);
2339         struct ehea_adapter *adapter = port->adapter;
2340         struct hcp_ehea_port_cb1 *cb1;
2341         u64 hret;
2342
2343         port->vgrp = grp;
2344
2345         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2346         if (!cb1) {
2347                 ehea_error("no mem for cb1");
2348                 goto out;
2349         }
2350
2351         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2352                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2353         if (hret != H_SUCCESS)
2354                 ehea_error("modify_ehea_port failed");
2355
2356         free_page((unsigned long)cb1);
2357 out:
2358         return;
2359 }
2360
2361 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2362 {
2363         struct ehea_port *port = netdev_priv(dev);
2364         struct ehea_adapter *adapter = port->adapter;
2365         struct hcp_ehea_port_cb1 *cb1;
2366         int index;
2367         u64 hret;
2368
2369         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2370         if (!cb1) {
2371                 ehea_error("no mem for cb1");
2372                 goto out;
2373         }
2374
2375         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2376                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2377         if (hret != H_SUCCESS) {
2378                 ehea_error("query_ehea_port failed");
2379                 goto out;
2380         }
2381
2382         index = (vid / 64);
2383         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2384
2385         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2386                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2387         if (hret != H_SUCCESS)
2388                 ehea_error("modify_ehea_port failed");
2389 out:
2390         free_page((unsigned long)cb1);
2391         return;
2392 }
2393
2394 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2395 {
2396         struct ehea_port *port = netdev_priv(dev);
2397         struct ehea_adapter *adapter = port->adapter;
2398         struct hcp_ehea_port_cb1 *cb1;
2399         int index;
2400         u64 hret;
2401
2402         vlan_group_set_device(port->vgrp, vid, NULL);
2403
2404         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2405         if (!cb1) {
2406                 ehea_error("no mem for cb1");
2407                 goto out;
2408         }
2409
2410         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2411                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2412         if (hret != H_SUCCESS) {
2413                 ehea_error("query_ehea_port failed");
2414                 goto out;
2415         }
2416
2417         index = (vid / 64);
2418         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2419
2420         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2421                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2422         if (hret != H_SUCCESS)
2423                 ehea_error("modify_ehea_port failed");
2424 out:
2425         free_page((unsigned long)cb1);
2426 }
2427
2428 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2429 {
2430         int ret = -EIO;
2431         u64 hret;
2432         u16 dummy16 = 0;
2433         u64 dummy64 = 0;
2434         struct hcp_modify_qp_cb0 *cb0;
2435
2436         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2437         if (!cb0) {
2438                 ret = -ENOMEM;
2439                 goto out;
2440         }
2441
2442         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2443                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2444         if (hret != H_SUCCESS) {
2445                 ehea_error("query_ehea_qp failed (1)");
2446                 goto out;
2447         }
2448
2449         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2450         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2451                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2452                                      &dummy64, &dummy64, &dummy16, &dummy16);
2453         if (hret != H_SUCCESS) {
2454                 ehea_error("modify_ehea_qp failed (1)");
2455                 goto out;
2456         }
2457
2458         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2459                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2460         if (hret != H_SUCCESS) {
2461                 ehea_error("query_ehea_qp failed (2)");
2462                 goto out;
2463         }
2464
2465         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2466         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2467                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2468                                      &dummy64, &dummy64, &dummy16, &dummy16);
2469         if (hret != H_SUCCESS) {
2470                 ehea_error("modify_ehea_qp failed (2)");
2471                 goto out;
2472         }
2473
2474         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2475                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2476         if (hret != H_SUCCESS) {
2477                 ehea_error("query_ehea_qp failed (3)");
2478                 goto out;
2479         }
2480
2481         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2482         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2483                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2484                                      &dummy64, &dummy64, &dummy16, &dummy16);
2485         if (hret != H_SUCCESS) {
2486                 ehea_error("modify_ehea_qp failed (3)");
2487                 goto out;
2488         }
2489
2490         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2491                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2492         if (hret != H_SUCCESS) {
2493                 ehea_error("query_ehea_qp failed (4)");
2494                 goto out;
2495         }
2496
2497         ret = 0;
2498 out:
2499         free_page((unsigned long)cb0);
2500         return ret;
2501 }
2502
2503 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2504                                int add_tx_qps)
2505 {
2506         int ret, i;
2507         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2508         enum ehea_eq_type eq_type = EHEA_EQ;
2509
2510         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2511                                    EHEA_MAX_ENTRIES_EQ, 1);
2512         if (!port->qp_eq) {
2513                 ret = -EINVAL;
2514                 ehea_error("ehea_create_eq failed (qp_eq)");
2515                 goto out_kill_eq;
2516         }
2517
2518         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2519         pr_cfg.max_entries_scq = sq_entries * 2;
2520         pr_cfg.max_entries_sq = sq_entries;
2521         pr_cfg.max_entries_rq1 = rq1_entries;
2522         pr_cfg.max_entries_rq2 = rq2_entries;
2523         pr_cfg.max_entries_rq3 = rq3_entries;
2524
2525         pr_cfg_small_rx.max_entries_rcq = 1;
2526         pr_cfg_small_rx.max_entries_scq = sq_entries;
2527         pr_cfg_small_rx.max_entries_sq = sq_entries;
2528         pr_cfg_small_rx.max_entries_rq1 = 1;
2529         pr_cfg_small_rx.max_entries_rq2 = 1;
2530         pr_cfg_small_rx.max_entries_rq3 = 1;
2531
2532         for (i = 0; i < def_qps; i++) {
2533                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2534                 if (ret)
2535                         goto out_clean_pr;
2536         }
2537         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2538                 ret = ehea_init_port_res(port, &port->port_res[i],
2539                                          &pr_cfg_small_rx, i);
2540                 if (ret)
2541                         goto out_clean_pr;
2542         }
2543
2544         return 0;
2545
2546 out_clean_pr:
2547         while (--i >= 0)
2548                 ehea_clean_portres(port, &port->port_res[i]);
2549
2550 out_kill_eq:
2551         ehea_destroy_eq(port->qp_eq);
2552         return ret;
2553 }
2554
2555 static int ehea_clean_all_portres(struct ehea_port *port)
2556 {
2557         int ret = 0;
2558         int i;
2559
2560         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2561                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2562
2563         ret |= ehea_destroy_eq(port->qp_eq);
2564
2565         return ret;
2566 }
2567
2568 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2569 {
2570         if (adapter->active_ports)
2571                 return;
2572
2573         ehea_rem_mr(&adapter->mr);
2574 }
2575
2576 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2577 {
2578         if (adapter->active_ports)
2579                 return 0;
2580
2581         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2582 }
2583
2584 static int ehea_up(struct net_device *dev)
2585 {
2586         int ret, i;
2587         struct ehea_port *port = netdev_priv(dev);
2588
2589         if (port->state == EHEA_PORT_UP)
2590                 return 0;
2591
2592         ret = ehea_port_res_setup(port, port->num_def_qps,
2593                                   port->num_add_tx_qps);
2594         if (ret) {
2595                 ehea_error("port_res_failed");
2596                 goto out;
2597         }
2598
2599         /* Set default QP for this port */
2600         ret = ehea_configure_port(port);
2601         if (ret) {
2602                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2603                 goto out_clean_pr;
2604         }
2605
2606         ret = ehea_reg_interrupts(dev);
2607         if (ret) {
2608                 ehea_error("reg_interrupts failed. ret:%d", ret);
2609                 goto out_clean_pr;
2610         }
2611
2612         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2613                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2614                 if (ret) {
2615                         ehea_error("activate_qp failed");
2616                         goto out_free_irqs;
2617                 }
2618         }
2619
2620         for (i = 0; i < port->num_def_qps; i++) {
2621                 ret = ehea_fill_port_res(&port->port_res[i]);
2622                 if (ret) {
2623                         ehea_error("out_free_irqs");
2624                         goto out_free_irqs;
2625                 }
2626         }
2627
2628         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2629         if (ret) {
2630                 ret = -EIO;
2631                 goto out_free_irqs;
2632         }
2633
2634         port->state = EHEA_PORT_UP;
2635
2636         ret = 0;
2637         goto out;
2638
2639 out_free_irqs:
2640         ehea_free_interrupts(dev);
2641
2642 out_clean_pr:
2643         ehea_clean_all_portres(port);
2644 out:
2645         if (ret)
2646                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2647
2648         ehea_update_bcmc_registrations();
2649         ehea_update_firmware_handles();
2650
2651         return ret;
2652 }
2653
2654 static void port_napi_disable(struct ehea_port *port)
2655 {
2656         int i;
2657
2658         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2659                 napi_disable(&port->port_res[i].napi);
2660 }
2661
2662 static void port_napi_enable(struct ehea_port *port)
2663 {
2664         int i;
2665
2666         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2667                 napi_enable(&port->port_res[i].napi);
2668 }
2669
2670 static int ehea_open(struct net_device *dev)
2671 {
2672         int ret;
2673         struct ehea_port *port = netdev_priv(dev);
2674
2675         mutex_lock(&port->port_lock);
2676
2677         if (netif_msg_ifup(port))
2678                 ehea_info("enabling port %s", dev->name);
2679
2680         ret = ehea_up(dev);
2681         if (!ret) {
2682                 port_napi_enable(port);
2683                 netif_start_queue(dev);
2684         }
2685
2686         init_waitqueue_head(&port->swqe_avail_wq);
2687         init_waitqueue_head(&port->restart_wq);
2688
2689         mutex_unlock(&port->port_lock);
2690
2691         return ret;
2692 }
2693
2694 static int ehea_down(struct net_device *dev)
2695 {
2696         int ret;
2697         struct ehea_port *port = netdev_priv(dev);
2698
2699         if (port->state == EHEA_PORT_DOWN)
2700                 return 0;
2701
2702         ehea_drop_multicast_list(dev);
2703         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2704
2705         ehea_free_interrupts(dev);
2706
2707         port->state = EHEA_PORT_DOWN;
2708
2709         ehea_update_bcmc_registrations();
2710
2711         ret = ehea_clean_all_portres(port);
2712         if (ret)
2713                 ehea_info("Failed freeing resources for %s. ret=%i",
2714                           dev->name, ret);
2715
2716         ehea_update_firmware_handles();
2717
2718         return ret;
2719 }
2720
2721 static int ehea_stop(struct net_device *dev)
2722 {
2723         int ret;
2724         struct ehea_port *port = netdev_priv(dev);
2725
2726         if (netif_msg_ifdown(port))
2727                 ehea_info("disabling port %s", dev->name);
2728
2729         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2730         cancel_work_sync(&port->reset_task);
2731         mutex_lock(&port->port_lock);
2732         netif_stop_queue(dev);
2733         port_napi_disable(port);
2734         ret = ehea_down(dev);
2735         mutex_unlock(&port->port_lock);
2736         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2737         return ret;
2738 }
2739
2740 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2741 {
2742         struct ehea_qp qp = *orig_qp;
2743         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2744         struct ehea_swqe *swqe;
2745         int wqe_index;
2746         int i;
2747
2748         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2749                 swqe = ehea_get_swqe(&qp, &wqe_index);
2750                 swqe->tx_control |= EHEA_SWQE_PURGE;
2751         }
2752 }
2753
2754 static void ehea_flush_sq(struct ehea_port *port)
2755 {
2756         int i;
2757
2758         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2759                 struct ehea_port_res *pr = &port->port_res[i];
2760                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2761                 int ret;
2762
2763                 ret = wait_event_timeout(port->swqe_avail_wq,
2764                          atomic_read(&pr->swqe_avail) >= swqe_max,
2765                          msecs_to_jiffies(100));
2766
2767                 if (!ret) {
2768                         ehea_error("WARNING: sq not flushed completely");
2769                         break;
2770                 }
2771         }
2772 }
2773
2774 int ehea_stop_qps(struct net_device *dev)
2775 {
2776         struct ehea_port *port = netdev_priv(dev);
2777         struct ehea_adapter *adapter = port->adapter;
2778         struct hcp_modify_qp_cb0 *cb0;
2779         int ret = -EIO;
2780         int dret;
2781         int i;
2782         u64 hret;
2783         u64 dummy64 = 0;
2784         u16 dummy16 = 0;
2785
2786         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2787         if (!cb0) {
2788                 ret = -ENOMEM;
2789                 goto out;
2790         }
2791
2792         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2793                 struct ehea_port_res *pr =  &port->port_res[i];
2794                 struct ehea_qp *qp = pr->qp;
2795
2796                 /* Purge send queue */
2797                 ehea_purge_sq(qp);
2798
2799                 /* Disable queue pair */
2800                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2801                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2802                                             cb0);
2803                 if (hret != H_SUCCESS) {
2804                         ehea_error("query_ehea_qp failed (1)");
2805                         goto out;
2806                 }
2807
2808                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2809                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2810
2811                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2812                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2813                                                             1), cb0, &dummy64,
2814                                              &dummy64, &dummy16, &dummy16);
2815                 if (hret != H_SUCCESS) {
2816                         ehea_error("modify_ehea_qp failed (1)");
2817                         goto out;
2818                 }
2819
2820                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2821                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2822                                             cb0);
2823                 if (hret != H_SUCCESS) {
2824                         ehea_error("query_ehea_qp failed (2)");
2825                         goto out;
2826                 }
2827
2828                 /* deregister shared memory regions */
2829                 dret = ehea_rem_smrs(pr);
2830                 if (dret) {
2831                         ehea_error("unreg shared memory region failed");
2832                         goto out;
2833                 }
2834         }
2835
2836         ret = 0;
2837 out:
2838         free_page((unsigned long)cb0);
2839
2840         return ret;
2841 }
2842
2843 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2844 {
2845         struct ehea_qp qp = *orig_qp;
2846         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2847         struct ehea_rwqe *rwqe;
2848         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2849         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2850         struct sk_buff *skb;
2851         u32 lkey = pr->recv_mr.lkey;
2852
2853
2854         int i;
2855         int index;
2856
2857         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2858                 rwqe = ehea_get_next_rwqe(&qp, 2);
2859                 rwqe->sg_list[0].l_key = lkey;
2860                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2861                 skb = skba_rq2[index];
2862                 if (skb)
2863                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2864         }
2865
2866         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2867                 rwqe = ehea_get_next_rwqe(&qp, 3);
2868                 rwqe->sg_list[0].l_key = lkey;
2869                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2870                 skb = skba_rq3[index];
2871                 if (skb)
2872                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2873         }
2874 }
2875
2876 int ehea_restart_qps(struct net_device *dev)
2877 {
2878         struct ehea_port *port = netdev_priv(dev);
2879         struct ehea_adapter *adapter = port->adapter;
2880         int ret = 0;
2881         int i;
2882
2883         struct hcp_modify_qp_cb0 *cb0;
2884         u64 hret;
2885         u64 dummy64 = 0;
2886         u16 dummy16 = 0;
2887
2888         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2889         if (!cb0) {
2890                 ret = -ENOMEM;
2891                 goto out;
2892         }
2893
2894         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2895                 struct ehea_port_res *pr =  &port->port_res[i];
2896                 struct ehea_qp *qp = pr->qp;
2897
2898                 ret = ehea_gen_smrs(pr);
2899                 if (ret) {
2900                         ehea_error("creation of shared memory regions failed");
2901                         goto out;
2902                 }
2903
2904                 ehea_update_rqs(qp, pr);
2905
2906                 /* Enable queue pair */
2907                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2908                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2909                                             cb0);
2910                 if (hret != H_SUCCESS) {
2911                         ehea_error("query_ehea_qp failed (1)");
2912                         goto out;
2913                 }
2914
2915                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2916                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2917
2918                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2919                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2920                                                             1), cb0, &dummy64,
2921                                              &dummy64, &dummy16, &dummy16);
2922                 if (hret != H_SUCCESS) {
2923                         ehea_error("modify_ehea_qp failed (1)");
2924                         goto out;
2925                 }
2926
2927                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2928                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2929                                             cb0);
2930                 if (hret != H_SUCCESS) {
2931                         ehea_error("query_ehea_qp failed (2)");
2932                         goto out;
2933                 }
2934
2935                 /* refill entire queue */
2936                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2937                 ehea_refill_rq2(pr, 0);
2938                 ehea_refill_rq3(pr, 0);
2939         }
2940 out:
2941         free_page((unsigned long)cb0);
2942
2943         return ret;
2944 }
2945
2946 static void ehea_reset_port(struct work_struct *work)
2947 {
2948         int ret;
2949         struct ehea_port *port =
2950                 container_of(work, struct ehea_port, reset_task);
2951         struct net_device *dev = port->netdev;
2952
2953         mutex_lock(&dlpar_mem_lock);
2954         port->resets++;
2955         mutex_lock(&port->port_lock);
2956         netif_stop_queue(dev);
2957
2958         port_napi_disable(port);
2959
2960         ehea_down(dev);
2961
2962         ret = ehea_up(dev);
2963         if (ret)
2964                 goto out;
2965
2966         ehea_set_multicast_list(dev);
2967
2968         if (netif_msg_timer(port))
2969                 ehea_info("Device %s resetted successfully", dev->name);
2970
2971         port_napi_enable(port);
2972
2973         netif_wake_queue(dev);
2974 out:
2975         mutex_unlock(&port->port_lock);
2976         mutex_unlock(&dlpar_mem_lock);
2977 }
2978
2979 static void ehea_rereg_mrs(struct work_struct *work)
2980 {
2981         int ret, i;
2982         struct ehea_adapter *adapter;
2983
2984         ehea_info("LPAR memory changed - re-initializing driver");
2985
2986         list_for_each_entry(adapter, &adapter_list, list)
2987                 if (adapter->active_ports) {
2988                         /* Shutdown all ports */
2989                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2990                                 struct ehea_port *port = adapter->port[i];
2991                                 struct net_device *dev;
2992
2993                                 if (!port)
2994                                         continue;
2995
2996                                 dev = port->netdev;
2997
2998                                 if (dev->flags & IFF_UP) {
2999                                         mutex_lock(&port->port_lock);
3000                                         netif_stop_queue(dev);
3001                                         ehea_flush_sq(port);
3002                                         ret = ehea_stop_qps(dev);
3003                                         if (ret) {
3004                                                 mutex_unlock(&port->port_lock);
3005                                                 goto out;
3006                                         }
3007                                         port_napi_disable(port);
3008                                         mutex_unlock(&port->port_lock);
3009                                 }
3010                                 reset_sq_restart_flag(port);
3011                         }
3012
3013                         /* Unregister old memory region */
3014                         ret = ehea_rem_mr(&adapter->mr);
3015                         if (ret) {
3016                                 ehea_error("unregister MR failed - driver"
3017                                            " inoperable!");
3018                                 goto out;
3019                         }
3020                 }
3021
3022         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3023
3024         list_for_each_entry(adapter, &adapter_list, list)
3025                 if (adapter->active_ports) {
3026                         /* Register new memory region */
3027                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3028                         if (ret) {
3029                                 ehea_error("register MR failed - driver"
3030                                            " inoperable!");
3031                                 goto out;
3032                         }
3033
3034                         /* Restart all ports */
3035                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3036                                 struct ehea_port *port = adapter->port[i];
3037
3038                                 if (port) {
3039                                         struct net_device *dev = port->netdev;
3040
3041                                         if (dev->flags & IFF_UP) {
3042                                                 mutex_lock(&port->port_lock);
3043                                                 port_napi_enable(port);
3044                                                 ret = ehea_restart_qps(dev);
3045                                                 check_sqs(port);
3046                                                 if (!ret)
3047                                                         netif_wake_queue(dev);
3048                                                 mutex_unlock(&port->port_lock);
3049                                         }
3050                                 }
3051                         }
3052                 }
3053         ehea_info("re-initializing driver complete");
3054 out:
3055         return;
3056 }
3057
3058 static void ehea_tx_watchdog(struct net_device *dev)
3059 {
3060         struct ehea_port *port = netdev_priv(dev);
3061
3062         if (netif_carrier_ok(dev) &&
3063             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3064                 ehea_schedule_port_reset(port);
3065 }
3066
3067 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3068 {
3069         struct hcp_query_ehea *cb;
3070         u64 hret;
3071         int ret;
3072
3073         cb = (void *)get_zeroed_page(GFP_KERNEL);
3074         if (!cb) {
3075                 ret = -ENOMEM;
3076                 goto out;
3077         }
3078
3079         hret = ehea_h_query_ehea(adapter->handle, cb);
3080
3081         if (hret != H_SUCCESS) {
3082                 ret = -EIO;
3083                 goto out_herr;
3084         }
3085
3086         adapter->max_mc_mac = cb->max_mc_mac - 1;
3087         ret = 0;
3088
3089 out_herr:
3090         free_page((unsigned long)cb);
3091 out:
3092         return ret;
3093 }
3094
3095 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3096 {
3097         struct hcp_ehea_port_cb4 *cb4;
3098         u64 hret;
3099         int ret = 0;
3100
3101         *jumbo = 0;
3102
3103         /* (Try to) enable *jumbo frames */
3104         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3105         if (!cb4) {
3106                 ehea_error("no mem for cb4");
3107                 ret = -ENOMEM;
3108                 goto out;
3109         } else {
3110                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3111                                               port->logical_port_id,
3112                                               H_PORT_CB4,
3113                                               H_PORT_CB4_JUMBO, cb4);
3114                 if (hret == H_SUCCESS) {
3115                         if (cb4->jumbo_frame)
3116                                 *jumbo = 1;
3117                         else {
3118                                 cb4->jumbo_frame = 1;
3119                                 hret = ehea_h_modify_ehea_port(port->adapter->
3120                                                                handle,
3121                                                                port->
3122                                                                logical_port_id,
3123                                                                H_PORT_CB4,
3124                                                                H_PORT_CB4_JUMBO,
3125                                                                cb4);
3126                                 if (hret == H_SUCCESS)
3127                                         *jumbo = 1;
3128                         }
3129                 } else
3130                         ret = -EINVAL;
3131
3132                 free_page((unsigned long)cb4);
3133         }
3134 out:
3135         return ret;
3136 }
3137
3138 static ssize_t ehea_show_port_id(struct device *dev,
3139                                  struct device_attribute *attr, char *buf)
3140 {
3141         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3142         return sprintf(buf, "%d", port->logical_port_id);
3143 }
3144
3145 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3146                    NULL);
3147
3148 static void __devinit logical_port_release(struct device *dev)
3149 {
3150         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3151         of_node_put(port->ofdev.dev.of_node);
3152 }
3153
3154 static struct device *ehea_register_port(struct ehea_port *port,
3155                                          struct device_node *dn)
3156 {
3157         int ret;
3158
3159         port->ofdev.dev.of_node = of_node_get(dn);
3160         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3161         port->ofdev.dev.bus = &ibmebus_bus_type;
3162
3163         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3164         port->ofdev.dev.release = logical_port_release;
3165
3166         ret = of_device_register(&port->ofdev);
3167         if (ret) {
3168                 ehea_error("failed to register device. ret=%d", ret);
3169                 goto out;
3170         }
3171
3172         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3173         if (ret) {
3174                 ehea_error("failed to register attributes, ret=%d", ret);
3175                 goto out_unreg_of_dev;
3176         }
3177
3178         return &port->ofdev.dev;
3179
3180 out_unreg_of_dev:
3181         of_device_unregister(&port->ofdev);
3182 out:
3183         return NULL;
3184 }
3185
3186 static void ehea_unregister_port(struct ehea_port *port)
3187 {
3188         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3189         of_device_unregister(&port->ofdev);
3190 }
3191
3192 static const struct net_device_ops ehea_netdev_ops = {
3193         .ndo_open               = ehea_open,
3194         .ndo_stop               = ehea_stop,
3195         .ndo_start_xmit         = ehea_start_xmit,
3196 #ifdef CONFIG_NET_POLL_CONTROLLER
3197         .ndo_poll_controller    = ehea_netpoll,
3198 #endif
3199         .ndo_get_stats          = ehea_get_stats,
3200         .ndo_set_mac_address    = ehea_set_mac_addr,
3201         .ndo_validate_addr      = eth_validate_addr,
3202         .ndo_set_multicast_list = ehea_set_multicast_list,
3203         .ndo_change_mtu         = ehea_change_mtu,
3204         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3205         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3206         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3207         .ndo_tx_timeout         = ehea_tx_watchdog,
3208 };
3209
3210 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3211                                          u32 logical_port_id,
3212                                          struct device_node *dn)
3213 {
3214         int ret;
3215         struct net_device *dev;
3216         struct ehea_port *port;
3217         struct device *port_dev;
3218         int jumbo;
3219
3220         /* allocate memory for the port structures */
3221         dev = alloc_etherdev(sizeof(struct ehea_port));
3222
3223         if (!dev) {
3224                 ehea_error("no mem for net_device");
3225                 ret = -ENOMEM;
3226                 goto out_err;
3227         }
3228
3229         port = netdev_priv(dev);
3230
3231         mutex_init(&port->port_lock);
3232         port->state = EHEA_PORT_DOWN;
3233         port->sig_comp_iv = sq_entries / 10;
3234
3235         port->adapter = adapter;
3236         port->netdev = dev;
3237         port->logical_port_id = logical_port_id;
3238
3239         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3240
3241         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3242         if (!port->mc_list) {
3243                 ret = -ENOMEM;
3244                 goto out_free_ethdev;
3245         }
3246
3247         INIT_LIST_HEAD(&port->mc_list->list);
3248
3249         ret = ehea_sense_port_attr(port);
3250         if (ret)
3251                 goto out_free_mc_list;
3252
3253         port_dev = ehea_register_port(port, dn);
3254         if (!port_dev)
3255                 goto out_free_mc_list;
3256
3257         SET_NETDEV_DEV(dev, port_dev);
3258
3259         /* initialize net_device structure */
3260         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3261
3262         dev->netdev_ops = &ehea_netdev_ops;
3263         ehea_set_ethtool_ops(dev);
3264
3265         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3266                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3267                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3268                       | NETIF_F_LLTX;
3269         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3270
3271         INIT_WORK(&port->reset_task, ehea_reset_port);
3272
3273         ret = register_netdev(dev);
3274         if (ret) {
3275                 ehea_error("register_netdev failed. ret=%d", ret);
3276                 goto out_unreg_port;
3277         }
3278
3279         port->lro_max_aggr = lro_max_aggr;
3280
3281         ret = ehea_get_jumboframe_status(port, &jumbo);
3282         if (ret)
3283                 ehea_error("failed determining jumbo frame status for %s",
3284                            port->netdev->name);
3285
3286         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3287                   jumbo == 1 ? "en" : "dis");
3288
3289         adapter->active_ports++;
3290
3291         return port;
3292
3293 out_unreg_port:
3294         ehea_unregister_port(port);
3295
3296 out_free_mc_list:
3297         kfree(port->mc_list);
3298
3299 out_free_ethdev:
3300         free_netdev(dev);
3301
3302 out_err:
3303         ehea_error("setting up logical port with id=%d failed, ret=%d",
3304                    logical_port_id, ret);
3305         return NULL;
3306 }
3307
3308 static void ehea_shutdown_single_port(struct ehea_port *port)
3309 {
3310         struct ehea_adapter *adapter = port->adapter;
3311         unregister_netdev(port->netdev);
3312         ehea_unregister_port(port);
3313         kfree(port->mc_list);
3314         free_netdev(port->netdev);
3315         adapter->active_ports--;
3316 }
3317
3318 static int ehea_setup_ports(struct ehea_adapter *adapter)
3319 {
3320         struct device_node *lhea_dn;
3321         struct device_node *eth_dn = NULL;
3322
3323         const u32 *dn_log_port_id;
3324         int i = 0;
3325
3326         lhea_dn = adapter->ofdev->dev.of_node;
3327         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3328
3329                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3330                                                  NULL);
3331                 if (!dn_log_port_id) {
3332                         ehea_error("bad device node: eth_dn name=%s",
3333                                    eth_dn->full_name);
3334                         continue;
3335                 }
3336
3337                 if (ehea_add_adapter_mr(adapter)) {
3338                         ehea_error("creating MR failed");
3339                         of_node_put(eth_dn);
3340                         return -EIO;
3341                 }
3342
3343                 adapter->port[i] = ehea_setup_single_port(adapter,
3344                                                           *dn_log_port_id,
3345                                                           eth_dn);
3346                 if (adapter->port[i])
3347                         ehea_info("%s -> logical port id #%d",
3348                                   adapter->port[i]->netdev->name,
3349                                   *dn_log_port_id);
3350                 else
3351                         ehea_remove_adapter_mr(adapter);
3352
3353                 i++;
3354         }
3355         return 0;
3356 }
3357
3358 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3359                                            u32 logical_port_id)
3360 {
3361         struct device_node *lhea_dn;
3362         struct device_node *eth_dn = NULL;
3363         const u32 *dn_log_port_id;
3364
3365         lhea_dn = adapter->ofdev->dev.of_node;
3366         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3367
3368                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3369                                                  NULL);
3370                 if (dn_log_port_id)
3371                         if (*dn_log_port_id == logical_port_id)
3372                                 return eth_dn;
3373         }
3374
3375         return NULL;
3376 }
3377
3378 static ssize_t ehea_probe_port(struct device *dev,
3379                                struct device_attribute *attr,
3380                                const char *buf, size_t count)
3381 {
3382         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3383         struct ehea_port *port;
3384         struct device_node *eth_dn = NULL;
3385         int i;
3386
3387         u32 logical_port_id;
3388
3389         sscanf(buf, "%d", &logical_port_id);
3390
3391         port = ehea_get_port(adapter, logical_port_id);
3392
3393         if (port) {
3394                 ehea_info("adding port with logical port id=%d failed. port "
3395                           "already configured as %s.", logical_port_id,
3396                           port->netdev->name);
3397                 return -EINVAL;
3398         }
3399
3400         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3401
3402         if (!eth_dn) {
3403                 ehea_info("no logical port with id %d found", logical_port_id);
3404                 return -EINVAL;
3405         }
3406
3407         if (ehea_add_adapter_mr(adapter)) {
3408                 ehea_error("creating MR failed");
3409                 return -EIO;
3410         }
3411
3412         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3413
3414         of_node_put(eth_dn);
3415
3416         if (port) {
3417                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3418                         if (!adapter->port[i]) {
3419                                 adapter->port[i] = port;
3420                                 break;
3421                         }
3422
3423                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3424                           logical_port_id);
3425         } else {
3426                 ehea_remove_adapter_mr(adapter);
3427                 return -EIO;
3428         }
3429
3430         return (ssize_t) count;
3431 }
3432
3433 static ssize_t ehea_remove_port(struct device *dev,
3434                                 struct device_attribute *attr,
3435                                 const char *buf, size_t count)
3436 {
3437         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3438         struct ehea_port *port;
3439         int i;
3440         u32 logical_port_id;
3441
3442         sscanf(buf, "%d", &logical_port_id);
3443
3444         port = ehea_get_port(adapter, logical_port_id);
3445
3446         if (port) {
3447                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3448                           logical_port_id);
3449
3450                 ehea_shutdown_single_port(port);
3451
3452                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3453                         if (adapter->port[i] == port) {
3454                                 adapter->port[i] = NULL;
3455                                 break;
3456                         }
3457         } else {
3458                 ehea_error("removing port with logical port id=%d failed. port "
3459                            "not configured.", logical_port_id);
3460                 return -EINVAL;
3461         }
3462
3463         ehea_remove_adapter_mr(adapter);
3464
3465         return (ssize_t) count;
3466 }
3467
3468 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3469 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3470
3471 int ehea_create_device_sysfs(struct platform_device *dev)
3472 {
3473         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3474         if (ret)
3475                 goto out;
3476
3477         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3478 out:
3479         return ret;
3480 }
3481
3482 void ehea_remove_device_sysfs(struct platform_device *dev)
3483 {
3484         device_remove_file(&dev->dev, &dev_attr_probe_port);
3485         device_remove_file(&dev->dev, &dev_attr_remove_port);
3486 }
3487
3488 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3489                                         const struct of_device_id *id)
3490 {
3491         struct ehea_adapter *adapter;
3492         const u64 *adapter_handle;
3493         int ret;
3494
3495         if (!dev || !dev->dev.of_node) {
3496                 ehea_error("Invalid ibmebus device probed");
3497                 return -EINVAL;
3498         }
3499
3500         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3501         if (!adapter) {
3502                 ret = -ENOMEM;
3503                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3504                 goto out;
3505         }
3506
3507         list_add(&adapter->list, &adapter_list);
3508
3509         adapter->ofdev = dev;
3510
3511         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3512                                          NULL);
3513         if (adapter_handle)
3514                 adapter->handle = *adapter_handle;
3515
3516         if (!adapter->handle) {
3517                 dev_err(&dev->dev, "failed getting handle for adapter"
3518                         " '%s'\n", dev->dev.of_node->full_name);
3519                 ret = -ENODEV;
3520                 goto out_free_ad;
3521         }
3522
3523         adapter->pd = EHEA_PD_ID;
3524
3525         dev_set_drvdata(&dev->dev, adapter);
3526
3527
3528         /* initialize adapter and ports */
3529         /* get adapter properties */
3530         ret = ehea_sense_adapter_attr(adapter);
3531         if (ret) {
3532                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3533                 goto out_free_ad;
3534         }
3535
3536         adapter->neq = ehea_create_eq(adapter,
3537                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3538         if (!adapter->neq) {
3539                 ret = -EIO;
3540                 dev_err(&dev->dev, "NEQ creation failed\n");
3541                 goto out_free_ad;
3542         }
3543
3544         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3545                      (unsigned long)adapter);
3546
3547         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3548                                   ehea_interrupt_neq, IRQF_DISABLED,
3549                                   "ehea_neq", adapter);
3550         if (ret) {
3551                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3552                 goto out_kill_eq;
3553         }
3554
3555         ret = ehea_create_device_sysfs(dev);
3556         if (ret)
3557                 goto out_free_irq;
3558
3559         ret = ehea_setup_ports(adapter);
3560         if (ret) {
3561                 dev_err(&dev->dev, "setup_ports failed\n");
3562                 goto out_rem_dev_sysfs;
3563         }
3564
3565         ret = 0;
3566         goto out;
3567
3568 out_rem_dev_sysfs:
3569         ehea_remove_device_sysfs(dev);
3570
3571 out_free_irq:
3572         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3573
3574 out_kill_eq:
3575         ehea_destroy_eq(adapter->neq);
3576
3577 out_free_ad:
3578         list_del(&adapter->list);
3579         kfree(adapter);
3580
3581 out:
3582         ehea_update_firmware_handles();
3583
3584         return ret;
3585 }
3586
3587 static int __devexit ehea_remove(struct platform_device *dev)
3588 {
3589         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3590         int i;
3591
3592         for (i = 0; i < EHEA_MAX_PORTS; i++)
3593                 if (adapter->port[i]) {
3594                         ehea_shutdown_single_port(adapter->port[i]);
3595                         adapter->port[i] = NULL;
3596                 }
3597
3598         ehea_remove_device_sysfs(dev);
3599
3600         flush_scheduled_work();
3601
3602         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3603         tasklet_kill(&adapter->neq_tasklet);
3604
3605         ehea_destroy_eq(adapter->neq);
3606         ehea_remove_adapter_mr(adapter);
3607         list_del(&adapter->list);
3608         kfree(adapter);
3609
3610         ehea_update_firmware_handles();
3611
3612         return 0;
3613 }
3614
3615 void ehea_crash_handler(void)
3616 {
3617         int i;
3618
3619         if (ehea_fw_handles.arr)
3620                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3621                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3622                                              ehea_fw_handles.arr[i].fwh,
3623                                              FORCE_FREE);
3624
3625         if (ehea_bcmc_regs.arr)
3626                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3627                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3628                                               ehea_bcmc_regs.arr[i].port_id,
3629                                               ehea_bcmc_regs.arr[i].reg_type,
3630                                               ehea_bcmc_regs.arr[i].macaddr,
3631                                               0, H_DEREG_BCMC);
3632 }
3633
3634 static int ehea_mem_notifier(struct notifier_block *nb,
3635                              unsigned long action, void *data)
3636 {
3637         int ret = NOTIFY_BAD;
3638         struct memory_notify *arg = data;
3639
3640         mutex_lock(&dlpar_mem_lock);
3641
3642         switch (action) {
3643         case MEM_CANCEL_OFFLINE:
3644                 ehea_info("memory offlining canceled");
3645                 /* Readd canceled memory block */
3646         case MEM_ONLINE:
3647                 ehea_info("memory is going online");
3648                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3649                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3650                         goto out_unlock;
3651                 ehea_rereg_mrs(NULL);
3652                 break;
3653         case MEM_GOING_OFFLINE:
3654                 ehea_info("memory is going offline");
3655                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3656                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3657                         goto out_unlock;
3658                 ehea_rereg_mrs(NULL);
3659                 break;
3660         default:
3661                 break;
3662         }
3663
3664         ehea_update_firmware_handles();
3665         ret = NOTIFY_OK;
3666
3667 out_unlock:
3668         mutex_unlock(&dlpar_mem_lock);
3669         return ret;
3670 }
3671
3672 static struct notifier_block ehea_mem_nb = {
3673         .notifier_call = ehea_mem_notifier,
3674 };
3675
3676 static int ehea_reboot_notifier(struct notifier_block *nb,
3677                                 unsigned long action, void *unused)
3678 {
3679         if (action == SYS_RESTART) {
3680                 ehea_info("Reboot: freeing all eHEA resources");
3681                 ibmebus_unregister_driver(&ehea_driver);
3682         }
3683         return NOTIFY_DONE;
3684 }
3685
3686 static struct notifier_block ehea_reboot_nb = {
3687         .notifier_call = ehea_reboot_notifier,
3688 };
3689
3690 static int check_module_parm(void)
3691 {
3692         int ret = 0;
3693
3694         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3695             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3696                 ehea_info("Bad parameter: rq1_entries");
3697                 ret = -EINVAL;
3698         }
3699         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3700             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3701                 ehea_info("Bad parameter: rq2_entries");
3702                 ret = -EINVAL;
3703         }
3704         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3705             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3706                 ehea_info("Bad parameter: rq3_entries");
3707                 ret = -EINVAL;
3708         }
3709         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3710             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3711                 ehea_info("Bad parameter: sq_entries");
3712                 ret = -EINVAL;
3713         }
3714
3715         return ret;
3716 }
3717
3718 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3719                                       char *buf)
3720 {
3721         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3722 }
3723
3724 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3725                    ehea_show_capabilities, NULL);
3726
3727 int __init ehea_module_init(void)
3728 {
3729         int ret;
3730
3731         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3732                DRV_VERSION);
3733
3734
3735         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3736         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3737         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3738
3739         mutex_init(&ehea_fw_handles.lock);
3740         spin_lock_init(&ehea_bcmc_regs.lock);
3741
3742         ret = check_module_parm();
3743         if (ret)
3744                 goto out;
3745
3746         ret = ehea_create_busmap();
3747         if (ret)
3748                 goto out;
3749
3750         ret = register_reboot_notifier(&ehea_reboot_nb);
3751         if (ret)
3752                 ehea_info("failed registering reboot notifier");
3753
3754         ret = register_memory_notifier(&ehea_mem_nb);
3755         if (ret)
3756                 ehea_info("failed registering memory remove notifier");
3757
3758         ret = crash_shutdown_register(ehea_crash_handler);
3759         if (ret)
3760                 ehea_info("failed registering crash handler");
3761
3762         ret = ibmebus_register_driver(&ehea_driver);
3763         if (ret) {
3764                 ehea_error("failed registering eHEA device driver on ebus");
3765                 goto out2;
3766         }
3767
3768         ret = driver_create_file(&ehea_driver.driver,
3769                                  &driver_attr_capabilities);
3770         if (ret) {
3771                 ehea_error("failed to register capabilities attribute, ret=%d",
3772                            ret);
3773                 goto out3;
3774         }
3775
3776         return ret;
3777
3778 out3:
3779         ibmebus_unregister_driver(&ehea_driver);
3780 out2:
3781         unregister_memory_notifier(&ehea_mem_nb);
3782         unregister_reboot_notifier(&ehea_reboot_nb);
3783         crash_shutdown_unregister(ehea_crash_handler);
3784 out:
3785         return ret;
3786 }
3787
3788 static void __exit ehea_module_exit(void)
3789 {
3790         int ret;
3791
3792         flush_scheduled_work();
3793         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3794         ibmebus_unregister_driver(&ehea_driver);
3795         unregister_reboot_notifier(&ehea_reboot_nb);
3796         ret = crash_shutdown_unregister(ehea_crash_handler);
3797         if (ret)
3798                 ehea_info("failed unregistering crash handler");
3799         unregister_memory_notifier(&ehea_mem_nb);
3800         kfree(ehea_fw_handles.arr);
3801         kfree(ehea_bcmc_regs.arr);
3802         ehea_destroy_busmap();
3803 }
3804
3805 module_init(ehea_module_init);
3806 module_exit(ehea_module_exit);