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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44
  45 #include <net/ip.h>
  46
  47 #include "ehea.h"
  48 #include "ehea_qmr.h"
  49 #include "ehea_phyp.h"
  50
  51
  52 MODULE_LICENSE("GPL");
  53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  54 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  55 MODULE_VERSION(DRV_VERSION);
  56
  57
  58 static int msg_level = -1;
  59 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  60 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  61 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  62 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  63 static int use_mcs;
  64 static int use_lro;
  65 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  66 static int num_tx_qps = EHEA_NUM_TX_QP;
  67 static int prop_carrier_state;
  68
  69 module_param(msg_level, int, 0);
  70 module_param(rq1_entries, int, 0);
  71 module_param(rq2_entries, int, 0);
  72 module_param(rq3_entries, int, 0);
  73 module_param(sq_entries, int, 0);
  74 module_param(prop_carrier_state, int, 0);
  75 module_param(use_mcs, int, 0);
  76 module_param(use_lro, int, 0);
  77 module_param(lro_max_aggr, int, 0);
  78 module_param(num_tx_qps, int, 0);
  79
  80 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  81 MODULE_PARM_DESC(msg_level, "msg_level");
  82 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  83                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  84 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  87 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  90 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  91                  "[2^x - 1], x = [6..14]. Default = "
  92                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  93 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  94                  "[2^x - 1], x = [6..14]. Default = "
  95                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  96 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  97
  98 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  99                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 100 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 101                  "Default = 0");
 102
 103 static int port_name_cnt;
 104 static LIST_HEAD(adapter_list);
 105 static unsigned long ehea_driver_flags;
 106 static DEFINE_MUTEX(dlpar_mem_lock);
 107 struct ehea_fw_handle_array ehea_fw_handles;
 108 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 109
 110
 111 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 112                                         const struct of_device_id *id);
 113
 114 static int __devexit ehea_remove(struct platform_device *dev);
 115
 116 static struct of_device_id ehea_device_table[] = {
 117         {
 118                 .name = "lhea",
 119                 .compatible = "IBM,lhea",
 120         },
 121         {},
 122 };
 123 MODULE_DEVICE_TABLE(of, ehea_device_table);
 124
 125 static struct of_platform_driver ehea_driver = {
 126         .driver = {
 127                 .name = "ehea",
 128                 .owner = THIS_MODULE,
 129                 .of_match_table = ehea_device_table,
 130         },
 131         .probe = ehea_probe_adapter,
 132         .remove = ehea_remove,
 133 };
 134
 135 void ehea_dump(void *adr, int len, char *msg)
 136 {
 137         int x;
 138         unsigned char *deb = adr;
 139         for (x = 0; x < len; x += 16) {
 140                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 141                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 142                 deb += 16;
 143         }
 144 }
 145
 146 void ehea_schedule_port_reset(struct ehea_port *port)
 147 {
 148         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 149                 schedule_work(&port->reset_task);
 150 }
 151
 152 static void ehea_update_firmware_handles(void)
 153 {
 154         struct ehea_fw_handle_entry *arr = NULL;
 155         struct ehea_adapter *adapter;
 156         int num_adapters = 0;
 157         int num_ports = 0;
 158         int num_portres = 0;
 159         int i = 0;
 160         int num_fw_handles, k, l;
 161
 162         /* Determine number of handles */
 163         mutex_lock(&ehea_fw_handles.lock);
 164
 165         list_for_each_entry(adapter, &adapter_list, list) {
 166                 num_adapters++;
 167
 168                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 169                         struct ehea_port *port = adapter->port[k];
 170
 171                         if (!port || (port->state != EHEA_PORT_UP))
 172                                 continue;
 173
 174                         num_ports++;
 175                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 176                 }
 177         }
 178
 179         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 180                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 181                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 182
 183         if (num_fw_handles) {
 184                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 185                 if (!arr)
 186                         goto out;  /* Keep the existing array */
 187         } else
 188                 goto out_update;
 189
 190         list_for_each_entry(adapter, &adapter_list, list) {
 191                 if (num_adapters == 0)
 192                         break;
 193
 194                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 195                         struct ehea_port *port = adapter->port[k];
 196
 197                         if (!port || (port->state != EHEA_PORT_UP) ||
 198                             (num_ports == 0))
 199                                 continue;
 200
 201                         for (l = 0;
 202                              l < port->num_def_qps + port->num_add_tx_qps;
 203                              l++) {
 204                                 struct ehea_port_res *pr = &port->port_res[l];
 205
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->qp->fw_handle;
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->send_cq->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->eq->fw_handle;
 214                                 arr[i].adh = adapter->handle;
 215                                 arr[i++].fwh = pr->send_mr.handle;
 216                                 arr[i].adh = adapter->handle;
 217                                 arr[i++].fwh = pr->recv_mr.handle;
 218                         }
 219                         arr[i].adh = adapter->handle;
 220                         arr[i++].fwh = port->qp_eq->fw_handle;
 221                         num_ports--;
 222                 }
 223
 224                 arr[i].adh = adapter->handle;
 225                 arr[i++].fwh = adapter->neq->fw_handle;
 226
 227                 if (adapter->mr.handle) {
 228                         arr[i].adh = adapter->handle;
 229                         arr[i++].fwh = adapter->mr.handle;
 230                 }
 231                 num_adapters--;
 232         }
 233
 234 out_update:
 235         kfree(ehea_fw_handles.arr);
 236         ehea_fw_handles.arr = arr;
 237         ehea_fw_handles.num_entries = i;
 238 out:
 239         mutex_unlock(&ehea_fw_handles.lock);
 240 }
 241
 242 static void ehea_update_bcmc_registrations(void)
 243 {
 244         unsigned long flags;
 245         struct ehea_bcmc_reg_entry *arr = NULL;
 246         struct ehea_adapter *adapter;
 247         struct ehea_mc_list *mc_entry;
 248         int num_registrations = 0;
 249         int i = 0;
 250         int k;
 251
 252         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 253
 254         /* Determine number of registrations */
 255         list_for_each_entry(adapter, &adapter_list, list)
 256                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 257                         struct ehea_port *port = adapter->port[k];
 258
 259                         if (!port || (port->state != EHEA_PORT_UP))
 260                                 continue;
 261
 262                         num_registrations += 2; /* Broadcast registrations */
 263
 264                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 265                                 num_registrations += 2;
 266                 }
 267
 268         if (num_registrations) {
 269                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 270                 if (!arr)
 271                         goto out;  /* Keep the existing array */
 272         } else
 273                 goto out_update;
 274
 275         list_for_each_entry(adapter, &adapter_list, list) {
 276                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 277                         struct ehea_port *port = adapter->port[k];
 278
 279                         if (!port || (port->state != EHEA_PORT_UP))
 280                                 continue;
 281
 282                         if (num_registrations == 0)
 283                                 goto out_update;
 284
 285                         arr[i].adh = adapter->handle;
 286                         arr[i].port_id = port->logical_port_id;
 287                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 288                                           EHEA_BCMC_UNTAGGED;
 289                         arr[i++].macaddr = port->mac_addr;
 290
 291                         arr[i].adh = adapter->handle;
 292                         arr[i].port_id = port->logical_port_id;
 293                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 294                                           EHEA_BCMC_VLANID_ALL;
 295                         arr[i++].macaddr = port->mac_addr;
 296                         num_registrations -= 2;
 297
 298                         list_for_each_entry(mc_entry,
 299                                             &port->mc_list->list, list) {
 300                                 if (num_registrations == 0)
 301                                         goto out_update;
 302
 303                                 arr[i].adh = adapter->handle;
 304                                 arr[i].port_id = port->logical_port_id;
 305                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 306                                                   EHEA_BCMC_MULTICAST |
 307                                                   EHEA_BCMC_UNTAGGED;
 308                                 arr[i++].macaddr = mc_entry->macaddr;
 309
 310                                 arr[i].adh = adapter->handle;
 311                                 arr[i].port_id = port->logical_port_id;
 312                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 313                                                   EHEA_BCMC_MULTICAST |
 314                                                   EHEA_BCMC_VLANID_ALL;
 315                                 arr[i++].macaddr = mc_entry->macaddr;
 316                                 num_registrations -= 2;
 317                         }
 318                 }
 319         }
 320
 321 out_update:
 322         kfree(ehea_bcmc_regs.arr);
 323         ehea_bcmc_regs.arr = arr;
 324         ehea_bcmc_regs.num_entries = i;
 325 out:
 326         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 327 }
 328
 329 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 330 {
 331         struct ehea_port *port = netdev_priv(dev);
 332         struct net_device_stats *stats = &port->stats;
 333         struct hcp_ehea_port_cb2 *cb2;
 334         u64 hret, rx_packets, tx_packets, rx_bytes = 0, tx_bytes = 0;
 335         int i;
 336
 337         memset(stats, 0, sizeof(*stats));
 338
 339         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 340         if (!cb2) {
 341                 netdev_err(dev, "no mem for cb2\n");
 342                 goto out;
 343         }
 344
 345         hret = ehea_h_query_ehea_port(port->adapter->handle,
 346                                       port->logical_port_id,
 347                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 348         if (hret != H_SUCCESS) {
 349                 netdev_err(dev, "query_ehea_port failed\n");
 350                 goto out_herr;
 351         }
 352
 353         if (netif_msg_hw(port))
 354                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 355
 356         rx_packets = 0;
 357         for (i = 0; i < port->num_def_qps; i++) {
 358                 rx_packets += port->port_res[i].rx_packets;
 359                 rx_bytes   += port->port_res[i].rx_bytes;
 360         }
 361
 362         tx_packets = 0;
 363         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 364                 tx_packets += port->port_res[i].tx_packets;
 365                 tx_bytes   += port->port_res[i].tx_bytes;
 366         }
 367
 368         stats->tx_packets = tx_packets;
 369         stats->multicast = cb2->rxmcp;
 370         stats->rx_errors = cb2->rxuerr;
 371         stats->rx_bytes = rx_bytes;
 372         stats->tx_bytes = tx_bytes;
 373         stats->rx_packets = rx_packets;
 374
 375 out_herr:
 376         free_page((unsigned long)cb2);
 377 out:
 378         return stats;
 379 }
 380
 381 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 382 {
 383         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 384         struct net_device *dev = pr->port->netdev;
 385         int max_index_mask = pr->rq1_skba.len - 1;
 386         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 387         int adder = 0;
 388         int i;
 389
 390         pr->rq1_skba.os_skbs = 0;
 391
 392         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 393                 if (nr_of_wqes > 0)
 394                         pr->rq1_skba.index = index;
 395                 pr->rq1_skba.os_skbs = fill_wqes;
 396                 return;
 397         }
 398
 399         for (i = 0; i < fill_wqes; i++) {
 400                 if (!skb_arr_rq1[index]) {
 401                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 402                                                               EHEA_L_PKT_SIZE);
 403                         if (!skb_arr_rq1[index]) {
 404                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 405                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 406                                 break;
 407                         }
 408                 }
 409                 index--;
 410                 index &= max_index_mask;
 411                 adder++;
 412         }
 413
 414         if (adder == 0)
 415                 return;
 416
 417         /* Ring doorbell */
 418         ehea_update_rq1a(pr->qp, adder);
 419 }
 420
 421 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 422 {
 423         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 424         struct net_device *dev = pr->port->netdev;
 425         int i;
 426
 427         if (nr_rq1a > pr->rq1_skba.len) {
 428                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 429                 return;
 430         }
 431
 432         for (i = 0; i < nr_rq1a; i++) {
 433                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 434                 if (!skb_arr_rq1[i]) {
 435                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 436                         break;
 437                 }
 438         }
 439         /* Ring doorbell */
 440         ehea_update_rq1a(pr->qp, i - 1);
 441 }
 442
 443 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 444                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 445                               int num_wqes, int wqe_type, int packet_size)
 446 {
 447         struct net_device *dev = pr->port->netdev;
 448         struct ehea_qp *qp = pr->qp;
 449         struct sk_buff **skb_arr = q_skba->arr;
 450         struct ehea_rwqe *rwqe;
 451         int i, index, max_index_mask, fill_wqes;
 452         int adder = 0;
 453         int ret = 0;
 454
 455         fill_wqes = q_skba->os_skbs + num_wqes;
 456         q_skba->os_skbs = 0;
 457
 458         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 459                 q_skba->os_skbs = fill_wqes;
 460                 return ret;
 461         }
 462
 463         index = q_skba->index;
 464         max_index_mask = q_skba->len - 1;
 465         for (i = 0; i < fill_wqes; i++) {
 466                 u64 tmp_addr;
 467                 struct sk_buff *skb;
 468
 469                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 470                 if (!skb) {
 471                         q_skba->os_skbs = fill_wqes - i;
 472                         if (q_skba->os_skbs == q_skba->len - 2) {
 473                                 netdev_info(pr->port->netdev,
 474                                             "rq%i ran dry - no mem for skb\n",
 475                                             rq_nr);
 476                                 ret = -ENOMEM;
 477                         }
 478                         break;
 479                 }
 480
 481                 skb_arr[index] = skb;
 482                 tmp_addr = ehea_map_vaddr(skb->data);
 483                 if (tmp_addr == -1) {
 484                         dev_kfree_skb(skb);
 485                         q_skba->os_skbs = fill_wqes - i;
 486                         ret = 0;
 487                         break;
 488                 }
 489
 490                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 491                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 492                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 493                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 494                 rwqe->sg_list[0].vaddr = tmp_addr;
 495                 rwqe->sg_list[0].len = packet_size;
 496                 rwqe->data_segments = 1;
 497
 498                 index++;
 499                 index &= max_index_mask;
 500                 adder++;
 501         }
 502
 503         q_skba->index = index;
 504         if (adder == 0)
 505                 goto out;
 506
 507         /* Ring doorbell */
 508         iosync();
 509         if (rq_nr == 2)
 510                 ehea_update_rq2a(pr->qp, adder);
 511         else
 512                 ehea_update_rq3a(pr->qp, adder);
 513 out:
 514         return ret;
 515 }
 516
 517
 518 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 519 {
 520         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 521                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 522                                   EHEA_RQ2_PKT_SIZE);
 523 }
 524
 525
 526 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 527 {
 528         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 529                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 530                                   EHEA_MAX_PACKET_SIZE);
 531 }
 532
 533 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 534 {
 535         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 536         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 537                 return 0;
 538         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 539             (cqe->header_length == 0))
 540                 return 0;
 541         return -EINVAL;
 542 }
 543
 544 static inline void ehea_fill_skb(struct net_device *dev,
 545                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 546 {
 547         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 548
 549         skb_put(skb, length);
 550         skb->protocol = eth_type_trans(skb, dev);
 551
 552         /* The packet was not an IPV4 packet so a complemented checksum was
 553            calculated. The value is found in the Internet Checksum field. */
 554         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 555                 skb->ip_summed = CHECKSUM_COMPLETE;
 556                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 557         } else
 558                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 559 }
 560
 561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 562                                                int arr_len,
 563                                                struct ehea_cqe *cqe)
 564 {
 565         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 566         struct sk_buff *skb;
 567         void *pref;
 568         int x;
 569
 570         x = skb_index + 1;
 571         x &= (arr_len - 1);
 572
 573         pref = skb_array[x];
 574         if (pref) {
 575                 prefetchw(pref);
 576                 prefetchw(pref + EHEA_CACHE_LINE);
 577
 578                 pref = (skb_array[x]->data);
 579                 prefetch(pref);
 580                 prefetch(pref + EHEA_CACHE_LINE);
 581                 prefetch(pref + EHEA_CACHE_LINE * 2);
 582                 prefetch(pref + EHEA_CACHE_LINE * 3);
 583         }
 584
 585         skb = skb_array[skb_index];
 586         skb_array[skb_index] = NULL;
 587         return skb;
 588 }
 589
 590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 591                                                   int arr_len, int wqe_index)
 592 {
 593         struct sk_buff *skb;
 594         void *pref;
 595         int x;
 596
 597         x = wqe_index + 1;
 598         x &= (arr_len - 1);
 599
 600         pref = skb_array[x];
 601         if (pref) {
 602                 prefetchw(pref);
 603                 prefetchw(pref + EHEA_CACHE_LINE);
 604
 605                 pref = (skb_array[x]->data);
 606                 prefetchw(pref);
 607                 prefetchw(pref + EHEA_CACHE_LINE);
 608         }
 609
 610         skb = skb_array[wqe_index];
 611         skb_array[wqe_index] = NULL;
 612         return skb;
 613 }
 614
 615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 616                                  struct ehea_cqe *cqe, int *processed_rq2,
 617                                  int *processed_rq3)
 618 {
 619         struct sk_buff *skb;
 620
 621         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 622                 pr->p_stats.err_tcp_cksum++;
 623         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 624                 pr->p_stats.err_ip_cksum++;
 625         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 626                 pr->p_stats.err_frame_crc++;
 627
 628         if (rq == 2) {
 629                 *processed_rq2 += 1;
 630                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 631                 dev_kfree_skb(skb);
 632         } else if (rq == 3) {
 633                 *processed_rq3 += 1;
 634                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 635                 dev_kfree_skb(skb);
 636         }
 637
 638         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 639                 if (netif_msg_rx_err(pr->port)) {
 640                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 641                                pr->qp->init_attr.qp_nr);
 642                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 643                 }
 644                 ehea_schedule_port_reset(pr->port);
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 652                        void **tcph, u64 *hdr_flags, void *priv)
 653 {
 654         struct ehea_cqe *cqe = priv;
 655         unsigned int ip_len;
 656         struct iphdr *iph;
 657
 658         /* non tcp/udp packets */
 659         if (!cqe->header_length)
 660                 return -1;
 661
 662         /* non tcp packet */
 663         skb_reset_network_header(skb);
 664         iph = ip_hdr(skb);
 665         if (iph->protocol != IPPROTO_TCP)
 666                 return -1;
 667
 668         ip_len = ip_hdrlen(skb);
 669         skb_set_transport_header(skb, ip_len);
 670         *tcph = tcp_hdr(skb);
 671
 672         /* check if ip header and tcp header are complete */
 673         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 674                 return -1;
 675
 676         *hdr_flags = LRO_IPV4 | LRO_TCP;
 677         *iphdr = iph;
 678
 679         return 0;
 680 }
 681
 682 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 683                           struct sk_buff *skb)
 684 {
 685         int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
 686                               pr->port->vgrp);
 687
 688         if (skb->dev->features & NETIF_F_LRO) {
 689                 if (vlan_extracted)
 690                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 691                                                      pr->port->vgrp,
 692                                                      cqe->vlan_tag,
 693                                                      cqe);
 694                 else
 695                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 696         } else {
 697                 if (vlan_extracted)
 698                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 699                                                  cqe->vlan_tag);
 700                 else
 701                         netif_receive_skb(skb);
 702         }
 703 }
 704
 705 static int ehea_proc_rwqes(struct net_device *dev,
 706                            struct ehea_port_res *pr,
 707                            int budget)
 708 {
 709         struct ehea_port *port = pr->port;
 710         struct ehea_qp *qp = pr->qp;
 711         struct ehea_cqe *cqe;
 712         struct sk_buff *skb;
 713         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 714         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 715         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 716         int skb_arr_rq1_len = pr->rq1_skba.len;
 717         int skb_arr_rq2_len = pr->rq2_skba.len;
 718         int skb_arr_rq3_len = pr->rq3_skba.len;
 719         int processed, processed_rq1, processed_rq2, processed_rq3;
 720         u64 processed_bytes = 0;
 721         int wqe_index, last_wqe_index, rq, port_reset;
 722
 723         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 724         last_wqe_index = 0;
 725
 726         cqe = ehea_poll_rq1(qp, &wqe_index);
 727         while ((processed < budget) && cqe) {
 728                 ehea_inc_rq1(qp);
 729                 processed_rq1++;
 730                 processed++;
 731                 if (netif_msg_rx_status(port))
 732                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 733
 734                 last_wqe_index = wqe_index;
 735                 rmb();
 736                 if (!ehea_check_cqe(cqe, &rq)) {
 737                         if (rq == 1) {
 738                                 /* LL RQ1 */
 739                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 740                                                           skb_arr_rq1_len,
 741                                                           wqe_index);
 742                                 if (unlikely(!skb)) {
 743                                         netif_info(port, rx_err, dev,
 744                                                   "LL rq1: skb=NULL\n");
 745
 746                                         skb = netdev_alloc_skb(dev,
 747                                                                EHEA_L_PKT_SIZE);
 748                                         if (!skb) {
 749                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 750                                                 break;
 751                                         }
 752                                 }
 753                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 754                                                  cqe->num_bytes_transfered - 4);
 755                                 ehea_fill_skb(dev, skb, cqe);
 756                         } else if (rq == 2) {
 757                                 /* RQ2 */
 758                                 skb = get_skb_by_index(skb_arr_rq2,
 759                                                        skb_arr_rq2_len, cqe);
 760                                 if (unlikely(!skb)) {
 761                                         netif_err(port, rx_err, dev,
 762                                                   "rq2: skb=NULL\n");
 763                                         break;
 764                                 }
 765                                 ehea_fill_skb(dev, skb, cqe);
 766                                 processed_rq2++;
 767                         } else {
 768                                 /* RQ3 */
 769                                 skb = get_skb_by_index(skb_arr_rq3,
 770                                                        skb_arr_rq3_len, cqe);
 771                                 if (unlikely(!skb)) {
 772                                         netif_err(port, rx_err, dev,
 773                                                   "rq3: skb=NULL\n");
 774                                         break;
 775                                 }
 776                                 ehea_fill_skb(dev, skb, cqe);
 777                                 processed_rq3++;
 778                         }
 779
 780                         processed_bytes += skb->len;
 781                         ehea_proc_skb(pr, cqe, skb);
 782                 } else {
 783                         pr->p_stats.poll_receive_errors++;
 784                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 785                                                            &processed_rq2,
 786                                                            &processed_rq3);
 787                         if (port_reset)
 788                                 break;
 789                 }
 790                 cqe = ehea_poll_rq1(qp, &wqe_index);
 791         }
 792         if (dev->features & NETIF_F_LRO)
 793                 lro_flush_all(&pr->lro_mgr);
 794
 795         pr->rx_packets += processed;
 796         pr->rx_bytes += processed_bytes;
 797
 798         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 799         ehea_refill_rq2(pr, processed_rq2);
 800         ehea_refill_rq3(pr, processed_rq3);
 801
 802         return processed;
 803 }
 804
 805 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 806
 807 static void reset_sq_restart_flag(struct ehea_port *port)
 808 {
 809         int i;
 810
 811         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 812                 struct ehea_port_res *pr = &port->port_res[i];
 813                 pr->sq_restart_flag = 0;
 814         }
 815         wake_up(&port->restart_wq);
 816 }
 817
 818 static void check_sqs(struct ehea_port *port)
 819 {
 820         struct ehea_swqe *swqe;
 821         int swqe_index;
 822         int i, k;
 823
 824         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 825                 struct ehea_port_res *pr = &port->port_res[i];
 826                 int ret;
 827                 k = 0;
 828                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 829                 memset(swqe, 0, SWQE_HEADER_SIZE);
 830                 atomic_dec(&pr->swqe_avail);
 831
 832                 swqe->tx_control |= EHEA_SWQE_PURGE;
 833                 swqe->wr_id = SWQE_RESTART_CHECK;
 834                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 835                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 836                 swqe->immediate_data_length = 80;
 837
 838                 ehea_post_swqe(pr->qp, swqe);
 839
 840                 ret = wait_event_timeout(port->restart_wq,
 841                                          pr->sq_restart_flag == 0,
 842                                          msecs_to_jiffies(100));
 843
 844                 if (!ret) {
 845                         pr_err("HW/SW queues out of sync\n");
 846                         ehea_schedule_port_reset(pr->port);
 847                         return;
 848                 }
 849         }
 850 }
 851
 852
 853 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 854 {
 855         struct sk_buff *skb;
 856         struct ehea_cq *send_cq = pr->send_cq;
 857         struct ehea_cqe *cqe;
 858         int quota = my_quota;
 859         int cqe_counter = 0;
 860         int swqe_av = 0;
 861         int index;
 862         unsigned long flags;
 863
 864         cqe = ehea_poll_cq(send_cq);
 865         while (cqe && (quota > 0)) {
 866                 ehea_inc_cq(send_cq);
 867
 868                 cqe_counter++;
 869                 rmb();
 870
 871                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 872                         pr->sq_restart_flag = 1;
 873                         swqe_av++;
 874                         break;
 875                 }
 876
 877                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 878                         pr_err("Bad send completion status=0x%04X\n",
 879                                cqe->status);
 880
 881                         if (netif_msg_tx_err(pr->port))
 882                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 883
 884                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 885                                 pr_err("Resetting port\n");
 886                                 ehea_schedule_port_reset(pr->port);
 887                                 break;
 888                         }
 889                 }
 890
 891                 if (netif_msg_tx_done(pr->port))
 892                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 893
 894                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 895                            == EHEA_SWQE2_TYPE)) {
 896
 897                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 898                         skb = pr->sq_skba.arr[index];
 899                         dev_kfree_skb(skb);
 900                         pr->sq_skba.arr[index] = NULL;
 901                 }
 902
 903                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 904                 quota--;
 905
 906                 cqe = ehea_poll_cq(send_cq);
 907         }
 908
 909         ehea_update_feca(send_cq, cqe_counter);
 910         atomic_add(swqe_av, &pr->swqe_avail);
 911
 912         spin_lock_irqsave(&pr->netif_queue, flags);
 913
 914         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 915                                   >= pr->swqe_refill_th)) {
 916                 netif_wake_queue(pr->port->netdev);
 917                 pr->queue_stopped = 0;
 918         }
 919         spin_unlock_irqrestore(&pr->netif_queue, flags);
 920         wake_up(&pr->port->swqe_avail_wq);
 921
 922         return cqe;
 923 }
 924
 925 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 926 #define EHEA_POLL_MAX_CQES 65535
 927
 928 static int ehea_poll(struct napi_struct *napi, int budget)
 929 {
 930         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 931                                                 napi);
 932         struct net_device *dev = pr->port->netdev;
 933         struct ehea_cqe *cqe;
 934         struct ehea_cqe *cqe_skb = NULL;
 935         int force_irq, wqe_index;
 936         int rx = 0;
 937
 938         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 939         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 940
 941         if (!force_irq)
 942                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 943
 944         while ((rx != budget) || force_irq) {
 945                 pr->poll_counter = 0;
 946                 force_irq = 0;
 947                 napi_complete(napi);
 948                 ehea_reset_cq_ep(pr->recv_cq);
 949                 ehea_reset_cq_ep(pr->send_cq);
 950                 ehea_reset_cq_n1(pr->recv_cq);
 951                 ehea_reset_cq_n1(pr->send_cq);
 952                 rmb();
 953                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 954                 cqe_skb = ehea_poll_cq(pr->send_cq);
 955
 956                 if (!cqe && !cqe_skb)
 957                         return rx;
 958
 959                 if (!napi_reschedule(napi))
 960                         return rx;
 961
 962                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 963                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 964         }
 965
 966         pr->poll_counter++;
 967         return rx;
 968 }
 969
 970 #ifdef CONFIG_NET_POLL_CONTROLLER
 971 static void ehea_netpoll(struct net_device *dev)
 972 {
 973         struct ehea_port *port = netdev_priv(dev);
 974         int i;
 975
 976         for (i = 0; i < port->num_def_qps; i++)
 977                 napi_schedule(&port->port_res[i].napi);
 978 }
 979 #endif
 980
 981 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 982 {
 983         struct ehea_port_res *pr = param;
 984
 985         napi_schedule(&pr->napi);
 986
 987         return IRQ_HANDLED;
 988 }
 989
 990 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 991 {
 992         struct ehea_port *port = param;
 993         struct ehea_eqe *eqe;
 994         struct ehea_qp *qp;
 995         u32 qp_token;
 996         u64 resource_type, aer, aerr;
 997         int reset_port = 0;
 998
 999         eqe = ehea_poll_eq(port->qp_eq);
1000
1001         while (eqe) {
1002                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1003                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1004                        eqe->entry, qp_token);
1005
1006                 qp = port->port_res[qp_token].qp;
1007
1008                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1009                                                 &aer, &aerr);
1010
1011                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1012                         if ((aer & EHEA_AER_RESET_MASK) ||
1013                             (aerr & EHEA_AERR_RESET_MASK))
1014                                  reset_port = 1;
1015                 } else
1016                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1017
1018                 eqe = ehea_poll_eq(port->qp_eq);
1019         }
1020
1021         if (reset_port) {
1022                 pr_err("Resetting port\n");
1023                 ehea_schedule_port_reset(port);
1024         }
1025
1026         return IRQ_HANDLED;
1027 }
1028
1029 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1030                                        int logical_port)
1031 {
1032         int i;
1033
1034         for (i = 0; i < EHEA_MAX_PORTS; i++)
1035                 if (adapter->port[i])
1036                         if (adapter->port[i]->logical_port_id == logical_port)
1037                                 return adapter->port[i];
1038         return NULL;
1039 }
1040
1041 int ehea_sense_port_attr(struct ehea_port *port)
1042 {
1043         int ret;
1044         u64 hret;
1045         struct hcp_ehea_port_cb0 *cb0;
1046
1047         /* may be called via ehea_neq_tasklet() */
1048         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1049         if (!cb0) {
1050                 pr_err("no mem for cb0\n");
1051                 ret = -ENOMEM;
1052                 goto out;
1053         }
1054
1055         hret = ehea_h_query_ehea_port(port->adapter->handle,
1056                                       port->logical_port_id, H_PORT_CB0,
1057                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1058                                       cb0);
1059         if (hret != H_SUCCESS) {
1060                 ret = -EIO;
1061                 goto out_free;
1062         }
1063
1064         /* MAC address */
1065         port->mac_addr = cb0->port_mac_addr << 16;
1066
1067         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1068                 ret = -EADDRNOTAVAIL;
1069                 goto out_free;
1070         }
1071
1072         /* Port speed */
1073         switch (cb0->port_speed) {
1074         case H_SPEED_10M_H:
1075                 port->port_speed = EHEA_SPEED_10M;
1076                 port->full_duplex = 0;
1077                 break;
1078         case H_SPEED_10M_F:
1079                 port->port_speed = EHEA_SPEED_10M;
1080                 port->full_duplex = 1;
1081                 break;
1082         case H_SPEED_100M_H:
1083                 port->port_speed = EHEA_SPEED_100M;
1084                 port->full_duplex = 0;
1085                 break;
1086         case H_SPEED_100M_F:
1087                 port->port_speed = EHEA_SPEED_100M;
1088                 port->full_duplex = 1;
1089                 break;
1090         case H_SPEED_1G_F:
1091                 port->port_speed = EHEA_SPEED_1G;
1092                 port->full_duplex = 1;
1093                 break;
1094         case H_SPEED_10G_F:
1095                 port->port_speed = EHEA_SPEED_10G;
1096                 port->full_duplex = 1;
1097                 break;
1098         default:
1099                 port->port_speed = 0;
1100                 port->full_duplex = 0;
1101                 break;
1102         }
1103
1104         port->autoneg = 1;
1105         port->num_mcs = cb0->num_default_qps;
1106
1107         /* Number of default QPs */
1108         if (use_mcs)
1109                 port->num_def_qps = cb0->num_default_qps;
1110         else
1111                 port->num_def_qps = 1;
1112
1113         if (!port->num_def_qps) {
1114                 ret = -EINVAL;
1115                 goto out_free;
1116         }
1117
1118         port->num_tx_qps = num_tx_qps;
1119
1120         if (port->num_def_qps >= port->num_tx_qps)
1121                 port->num_add_tx_qps = 0;
1122         else
1123                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1124
1125         ret = 0;
1126 out_free:
1127         if (ret || netif_msg_probe(port))
1128                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1129         free_page((unsigned long)cb0);
1130 out:
1131         return ret;
1132 }
1133
1134 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1135 {
1136         struct hcp_ehea_port_cb4 *cb4;
1137         u64 hret;
1138         int ret = 0;
1139
1140         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1141         if (!cb4) {
1142                 pr_err("no mem for cb4\n");
1143                 ret = -ENOMEM;
1144                 goto out;
1145         }
1146
1147         cb4->port_speed = port_speed;
1148
1149         netif_carrier_off(port->netdev);
1150
1151         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1152                                        port->logical_port_id,
1153                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1154         if (hret == H_SUCCESS) {
1155                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1156
1157                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1158                                               port->logical_port_id,
1159                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1160                                               cb4);
1161                 if (hret == H_SUCCESS) {
1162                         switch (cb4->port_speed) {
1163                         case H_SPEED_10M_H:
1164                                 port->port_speed = EHEA_SPEED_10M;
1165                                 port->full_duplex = 0;
1166                                 break;
1167                         case H_SPEED_10M_F:
1168                                 port->port_speed = EHEA_SPEED_10M;
1169                                 port->full_duplex = 1;
1170                                 break;
1171                         case H_SPEED_100M_H:
1172                                 port->port_speed = EHEA_SPEED_100M;
1173                                 port->full_duplex = 0;
1174                                 break;
1175                         case H_SPEED_100M_F:
1176                                 port->port_speed = EHEA_SPEED_100M;
1177                                 port->full_duplex = 1;
1178                                 break;
1179                         case H_SPEED_1G_F:
1180                                 port->port_speed = EHEA_SPEED_1G;
1181                                 port->full_duplex = 1;
1182                                 break;
1183                         case H_SPEED_10G_F:
1184                                 port->port_speed = EHEA_SPEED_10G;
1185                                 port->full_duplex = 1;
1186                                 break;
1187                         default:
1188                                 port->port_speed = 0;
1189                                 port->full_duplex = 0;
1190                                 break;
1191                         }
1192                 } else {
1193                         pr_err("Failed sensing port speed\n");
1194                         ret = -EIO;
1195                 }
1196         } else {
1197                 if (hret == H_AUTHORITY) {
1198                         pr_info("Hypervisor denied setting port speed\n");
1199                         ret = -EPERM;
1200                 } else {
1201                         ret = -EIO;
1202                         pr_err("Failed setting port speed\n");
1203                 }
1204         }
1205         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1206                 netif_carrier_on(port->netdev);
1207
1208         free_page((unsigned long)cb4);
1209 out:
1210         return ret;
1211 }
1212
1213 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1214 {
1215         int ret;
1216         u8 ec;
1217         u8 portnum;
1218         struct ehea_port *port;
1219         struct net_device *dev;
1220
1221         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1222         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1223         port = ehea_get_port(adapter, portnum);
1224         dev = port->netdev;
1225
1226         switch (ec) {
1227         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1228
1229                 if (!port) {
1230                         netdev_err(dev, "unknown portnum %x\n", portnum);
1231                         break;
1232                 }
1233
1234                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1235                         if (!netif_carrier_ok(dev)) {
1236                                 ret = ehea_sense_port_attr(port);
1237                                 if (ret) {
1238                                         netdev_err(dev, "failed resensing port attributes\n");
1239                                         break;
1240                                 }
1241
1242                                 netif_info(port, link, dev,
1243                                            "Logical port up: %dMbps %s Duplex\n",
1244                                            port->port_speed,
1245                                            port->full_duplex == 1 ?
1246                                            "Full" : "Half");
1247
1248                                 netif_carrier_on(dev);
1249                                 netif_wake_queue(dev);
1250                         }
1251                 } else
1252                         if (netif_carrier_ok(dev)) {
1253                                 netif_info(port, link, dev,
1254                                            "Logical port down\n");
1255                                 netif_carrier_off(dev);
1256                                 netif_stop_queue(dev);
1257                         }
1258
1259                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1260                         port->phy_link = EHEA_PHY_LINK_UP;
1261                         netif_info(port, link, dev,
1262                                    "Physical port up\n");
1263                         if (prop_carrier_state)
1264                                 netif_carrier_on(dev);
1265                 } else {
1266                         port->phy_link = EHEA_PHY_LINK_DOWN;
1267                         netif_info(port, link, dev,
1268                                    "Physical port down\n");
1269                         if (prop_carrier_state)
1270                                 netif_carrier_off(dev);
1271                 }
1272
1273                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1274                         netdev_info(dev,
1275                                     "External switch port is primary port\n");
1276                 else
1277                         netdev_info(dev,
1278                                     "External switch port is backup port\n");
1279
1280                 break;
1281         case EHEA_EC_ADAPTER_MALFUNC:
1282                 netdev_err(dev, "Adapter malfunction\n");
1283                 break;
1284         case EHEA_EC_PORT_MALFUNC:
1285                 netdev_info(dev, "Port malfunction\n");
1286                 netif_carrier_off(dev);
1287                 netif_stop_queue(dev);
1288                 break;
1289         default:
1290                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1291                 break;
1292         }
1293 }
1294
1295 static void ehea_neq_tasklet(unsigned long data)
1296 {
1297         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1298         struct ehea_eqe *eqe;
1299         u64 event_mask;
1300
1301         eqe = ehea_poll_eq(adapter->neq);
1302         pr_debug("eqe=%p\n", eqe);
1303
1304         while (eqe) {
1305                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1306                 ehea_parse_eqe(adapter, eqe->entry);
1307                 eqe = ehea_poll_eq(adapter->neq);
1308                 pr_debug("next eqe=%p\n", eqe);
1309         }
1310
1311         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1312                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1313                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1314
1315         ehea_h_reset_events(adapter->handle,
1316                             adapter->neq->fw_handle, event_mask);
1317 }
1318
1319 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1320 {
1321         struct ehea_adapter *adapter = param;
1322         tasklet_hi_schedule(&adapter->neq_tasklet);
1323         return IRQ_HANDLED;
1324 }
1325
1326
1327 static int ehea_fill_port_res(struct ehea_port_res *pr)
1328 {
1329         int ret;
1330         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1331
1332         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1333
1334         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1335
1336         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1337
1338         return ret;
1339 }
1340
1341 static int ehea_reg_interrupts(struct net_device *dev)
1342 {
1343         struct ehea_port *port = netdev_priv(dev);
1344         struct ehea_port_res *pr;
1345         int i, ret;
1346
1347
1348         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1349                  dev->name);
1350
1351         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1352                                   ehea_qp_aff_irq_handler,
1353                                   IRQF_DISABLED, port->int_aff_name, port);
1354         if (ret) {
1355                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1356                            port->qp_eq->attr.ist1);
1357                 goto out_free_qpeq;
1358         }
1359
1360         netif_info(port, ifup, dev,
1361                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1362                    port->qp_eq->attr.ist1);
1363
1364
1365         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1366                 pr = &port->port_res[i];
1367                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1368                          "%s-queue%d", dev->name, i);
1369                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1370                                           ehea_recv_irq_handler,
1371                                           IRQF_DISABLED, pr->int_send_name,
1372                                           pr);
1373                 if (ret) {
1374                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1375                                    i, pr->eq->attr.ist1);
1376                         goto out_free_req;
1377                 }
1378                 netif_info(port, ifup, dev,
1379                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1380                            pr->eq->attr.ist1, i);
1381         }
1382 out:
1383         return ret;
1384
1385
1386 out_free_req:
1387         while (--i >= 0) {
1388                 u32 ist = port->port_res[i].eq->attr.ist1;
1389                 ibmebus_free_irq(ist, &port->port_res[i]);
1390         }
1391
1392 out_free_qpeq:
1393         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1394         i = port->num_def_qps;
1395
1396         goto out;
1397
1398 }
1399
1400 static void ehea_free_interrupts(struct net_device *dev)
1401 {
1402         struct ehea_port *port = netdev_priv(dev);
1403         struct ehea_port_res *pr;
1404         int i;
1405
1406         /* send */
1407
1408         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1409                 pr = &port->port_res[i];
1410                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1411                 netif_info(port, intr, dev,
1412                            "free send irq for res %d with handle 0x%X\n",
1413                            i, pr->eq->attr.ist1);
1414         }
1415
1416         /* associated events */
1417         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1418         netif_info(port, intr, dev,
1419                    "associated event interrupt for handle 0x%X freed\n",
1420                    port->qp_eq->attr.ist1);
1421 }
1422
1423 static int ehea_configure_port(struct ehea_port *port)
1424 {
1425         int ret, i;
1426         u64 hret, mask;
1427         struct hcp_ehea_port_cb0 *cb0;
1428
1429         ret = -ENOMEM;
1430         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1431         if (!cb0)
1432                 goto out;
1433
1434         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1435                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1436                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1437                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1438                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1439                                       PXLY_RC_VLAN_FILTER)
1440                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1441
1442         for (i = 0; i < port->num_mcs; i++)
1443                 if (use_mcs)
1444                         cb0->default_qpn_arr[i] =
1445                                 port->port_res[i].qp->init_attr.qp_nr;
1446                 else
1447                         cb0->default_qpn_arr[i] =
1448                                 port->port_res[0].qp->init_attr.qp_nr;
1449
1450         if (netif_msg_ifup(port))
1451                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1452
1453         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1454              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1455
1456         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1457                                        port->logical_port_id,
1458                                        H_PORT_CB0, mask, cb0);
1459         ret = -EIO;
1460         if (hret != H_SUCCESS)
1461                 goto out_free;
1462
1463         ret = 0;
1464
1465 out_free:
1466         free_page((unsigned long)cb0);
1467 out:
1468         return ret;
1469 }
1470
1471 int ehea_gen_smrs(struct ehea_port_res *pr)
1472 {
1473         int ret;
1474         struct ehea_adapter *adapter = pr->port->adapter;
1475
1476         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1477         if (ret)
1478                 goto out;
1479
1480         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1481         if (ret)
1482                 goto out_free;
1483
1484         return 0;
1485
1486 out_free:
1487         ehea_rem_mr(&pr->send_mr);
1488 out:
1489         pr_err("Generating SMRS failed\n");
1490         return -EIO;
1491 }
1492
1493 int ehea_rem_smrs(struct ehea_port_res *pr)
1494 {
1495         if ((ehea_rem_mr(&pr->send_mr)) ||
1496             (ehea_rem_mr(&pr->recv_mr)))
1497                 return -EIO;
1498         else
1499                 return 0;
1500 }
1501
1502 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1503 {
1504         int arr_size = sizeof(void *) * max_q_entries;
1505
1506         q_skba->arr = vzalloc(arr_size);
1507         if (!q_skba->arr)
1508                 return -ENOMEM;
1509
1510         q_skba->len = max_q_entries;
1511         q_skba->index = 0;
1512         q_skba->os_skbs = 0;
1513
1514         return 0;
1515 }
1516
1517 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1518                               struct port_res_cfg *pr_cfg, int queue_token)
1519 {
1520         struct ehea_adapter *adapter = port->adapter;
1521         enum ehea_eq_type eq_type = EHEA_EQ;
1522         struct ehea_qp_init_attr *init_attr = NULL;
1523         int ret = -EIO;
1524         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1525
1526         tx_bytes = pr->tx_bytes;
1527         tx_packets = pr->tx_packets;
1528         rx_bytes = pr->rx_bytes;
1529         rx_packets = pr->rx_packets;
1530
1531         memset(pr, 0, sizeof(struct ehea_port_res));
1532
1533         pr->tx_bytes = rx_bytes;
1534         pr->tx_packets = tx_packets;
1535         pr->rx_bytes = rx_bytes;
1536         pr->rx_packets = rx_packets;
1537
1538         pr->port = port;
1539         spin_lock_init(&pr->xmit_lock);
1540         spin_lock_init(&pr->netif_queue);
1541
1542         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1543         if (!pr->eq) {
1544                 pr_err("create_eq failed (eq)\n");
1545                 goto out_free;
1546         }
1547
1548         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1549                                      pr->eq->fw_handle,
1550                                      port->logical_port_id);
1551         if (!pr->recv_cq) {
1552                 pr_err("create_cq failed (cq_recv)\n");
1553                 goto out_free;
1554         }
1555
1556         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1557                                      pr->eq->fw_handle,
1558                                      port->logical_port_id);
1559         if (!pr->send_cq) {
1560                 pr_err("create_cq failed (cq_send)\n");
1561                 goto out_free;
1562         }
1563
1564         if (netif_msg_ifup(port))
1565                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1566                         pr->send_cq->attr.act_nr_of_cqes,
1567                         pr->recv_cq->attr.act_nr_of_cqes);
1568
1569         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1570         if (!init_attr) {
1571                 ret = -ENOMEM;
1572                 pr_err("no mem for ehea_qp_init_attr\n");
1573                 goto out_free;
1574         }
1575
1576         init_attr->low_lat_rq1 = 1;
1577         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1578         init_attr->rq_count = 3;
1579         init_attr->qp_token = queue_token;
1580         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1581         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1582         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1583         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1584         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1585         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1586         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1587         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1588         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1589         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1590         init_attr->port_nr = port->logical_port_id;
1591         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1592         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1593         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1594
1595         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1596         if (!pr->qp) {
1597                 pr_err("create_qp failed\n");
1598                 ret = -EIO;
1599                 goto out_free;
1600         }
1601
1602         if (netif_msg_ifup(port))
1603                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1604                         init_attr->qp_nr,
1605                         init_attr->act_nr_send_wqes,
1606                         init_attr->act_nr_rwqes_rq1,
1607                         init_attr->act_nr_rwqes_rq2,
1608                         init_attr->act_nr_rwqes_rq3);
1609
1610         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1611
1612         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1613         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1614         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1615         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1616         if (ret)
1617                 goto out_free;
1618
1619         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1620         if (ehea_gen_smrs(pr) != 0) {
1621                 ret = -EIO;
1622                 goto out_free;
1623         }
1624
1625         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1626
1627         kfree(init_attr);
1628
1629         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1630
1631         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1632         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1633         pr->lro_mgr.lro_arr = pr->lro_desc;
1634         pr->lro_mgr.get_skb_header = get_skb_hdr;
1635         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1636         pr->lro_mgr.dev = port->netdev;
1637         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1638         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1639
1640         ret = 0;
1641         goto out;
1642
1643 out_free:
1644         kfree(init_attr);
1645         vfree(pr->sq_skba.arr);
1646         vfree(pr->rq1_skba.arr);
1647         vfree(pr->rq2_skba.arr);
1648         vfree(pr->rq3_skba.arr);
1649         ehea_destroy_qp(pr->qp);
1650         ehea_destroy_cq(pr->send_cq);
1651         ehea_destroy_cq(pr->recv_cq);
1652         ehea_destroy_eq(pr->eq);
1653 out:
1654         return ret;
1655 }
1656
1657 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1658 {
1659         int ret, i;
1660
1661         if (pr->qp)
1662                 netif_napi_del(&pr->napi);
1663
1664         ret = ehea_destroy_qp(pr->qp);
1665
1666         if (!ret) {
1667                 ehea_destroy_cq(pr->send_cq);
1668                 ehea_destroy_cq(pr->recv_cq);
1669                 ehea_destroy_eq(pr->eq);
1670
1671                 for (i = 0; i < pr->rq1_skba.len; i++)
1672                         if (pr->rq1_skba.arr[i])
1673                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1674
1675                 for (i = 0; i < pr->rq2_skba.len; i++)
1676                         if (pr->rq2_skba.arr[i])
1677                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1678
1679                 for (i = 0; i < pr->rq3_skba.len; i++)
1680                         if (pr->rq3_skba.arr[i])
1681                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1682
1683                 for (i = 0; i < pr->sq_skba.len; i++)
1684                         if (pr->sq_skba.arr[i])
1685                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1686
1687                 vfree(pr->rq1_skba.arr);
1688                 vfree(pr->rq2_skba.arr);
1689                 vfree(pr->rq3_skba.arr);
1690                 vfree(pr->sq_skba.arr);
1691                 ret = ehea_rem_smrs(pr);
1692         }
1693         return ret;
1694 }
1695
1696 /*
1697  * The write_* functions store information in swqe which is used by
1698  * the hardware to calculate the ip/tcp/udp checksum
1699  */
1700
1701 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1702                                       const struct sk_buff *skb)
1703 {
1704         swqe->ip_start = skb_network_offset(skb);
1705         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1706 }
1707
1708 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1709                                         const struct sk_buff *skb)
1710 {
1711         swqe->tcp_offset =
1712                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1713
1714         swqe->tcp_end = (u16)skb->len - 1;
1715 }
1716
1717 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1718                                         const struct sk_buff *skb)
1719 {
1720         swqe->tcp_offset =
1721                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1722
1723         swqe->tcp_end = (u16)skb->len - 1;
1724 }
1725
1726
1727 static void write_swqe2_TSO(struct sk_buff *skb,
1728                             struct ehea_swqe *swqe, u32 lkey)
1729 {
1730         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1731         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1732         int skb_data_size = skb_headlen(skb);
1733         int headersize;
1734
1735         /* Packet is TCP with TSO enabled */
1736         swqe->tx_control |= EHEA_SWQE_TSO;
1737         swqe->mss = skb_shinfo(skb)->gso_size;
1738         /* copy only eth/ip/tcp headers to immediate data and
1739          * the rest of skb->data to sg1entry
1740          */
1741         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1742
1743         skb_data_size = skb_headlen(skb);
1744
1745         if (skb_data_size >= headersize) {
1746                 /* copy immediate data */
1747                 skb_copy_from_linear_data(skb, imm_data, headersize);
1748                 swqe->immediate_data_length = headersize;
1749
1750                 if (skb_data_size > headersize) {
1751                         /* set sg1entry data */
1752                         sg1entry->l_key = lkey;
1753                         sg1entry->len = skb_data_size - headersize;
1754                         sg1entry->vaddr =
1755                                 ehea_map_vaddr(skb->data + headersize);
1756                         swqe->descriptors++;
1757                 }
1758         } else
1759                 pr_err("cannot handle fragmented headers\n");
1760 }
1761
1762 static void write_swqe2_nonTSO(struct sk_buff *skb,
1763                                struct ehea_swqe *swqe, u32 lkey)
1764 {
1765         int skb_data_size = skb_headlen(skb);
1766         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1767         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1768
1769         /* Packet is any nonTSO type
1770          *
1771          * Copy as much as possible skb->data to immediate data and
1772          * the rest to sg1entry
1773          */
1774         if (skb_data_size >= SWQE2_MAX_IMM) {
1775                 /* copy immediate data */
1776                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1777
1778                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1779
1780                 if (skb_data_size > SWQE2_MAX_IMM) {
1781                         /* copy sg1entry data */
1782                         sg1entry->l_key = lkey;
1783                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1784                         sg1entry->vaddr =
1785                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1786                         swqe->descriptors++;
1787                 }
1788         } else {
1789                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1790                 swqe->immediate_data_length = skb_data_size;
1791         }
1792 }
1793
1794 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1795                                     struct ehea_swqe *swqe, u32 lkey)
1796 {
1797         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1798         skb_frag_t *frag;
1799         int nfrags, sg1entry_contains_frag_data, i;
1800
1801         nfrags = skb_shinfo(skb)->nr_frags;
1802         sg1entry = &swqe->u.immdata_desc.sg_entry;
1803         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1804         swqe->descriptors = 0;
1805         sg1entry_contains_frag_data = 0;
1806
1807         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1808                 write_swqe2_TSO(skb, swqe, lkey);
1809         else
1810                 write_swqe2_nonTSO(skb, swqe, lkey);
1811
1812         /* write descriptors */
1813         if (nfrags > 0) {
1814                 if (swqe->descriptors == 0) {
1815                         /* sg1entry not yet used */
1816                         frag = &skb_shinfo(skb)->frags[0];
1817
1818                         /* copy sg1entry data */
1819                         sg1entry->l_key = lkey;
1820                         sg1entry->len = frag->size;
1821                         sg1entry->vaddr =
1822                                 ehea_map_vaddr(page_address(frag->page)
1823                                                + frag->page_offset);
1824                         swqe->descriptors++;
1825                         sg1entry_contains_frag_data = 1;
1826                 }
1827
1828                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1829
1830                         frag = &skb_shinfo(skb)->frags[i];
1831                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1832
1833                         sgentry->l_key = lkey;
1834                         sgentry->len = frag->size;
1835                         sgentry->vaddr =
1836                                 ehea_map_vaddr(page_address(frag->page)
1837                                                + frag->page_offset);
1838                         swqe->descriptors++;
1839                 }
1840         }
1841 }
1842
1843 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1844 {
1845         int ret = 0;
1846         u64 hret;
1847         u8 reg_type;
1848
1849         /* De/Register untagged packets */
1850         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1851         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1852                                      port->logical_port_id,
1853                                      reg_type, port->mac_addr, 0, hcallid);
1854         if (hret != H_SUCCESS) {
1855                 pr_err("%sregistering bc address failed (tagged)\n",
1856                        hcallid == H_REG_BCMC ? "" : "de");
1857                 ret = -EIO;
1858                 goto out_herr;
1859         }
1860
1861         /* De/Register VLAN packets */
1862         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1863         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1864                                      port->logical_port_id,
1865                                      reg_type, port->mac_addr, 0, hcallid);
1866         if (hret != H_SUCCESS) {
1867                 pr_err("%sregistering bc address failed (vlan)\n",
1868                        hcallid == H_REG_BCMC ? "" : "de");
1869                 ret = -EIO;
1870         }
1871 out_herr:
1872         return ret;
1873 }
1874
1875 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1876 {
1877         struct ehea_port *port = netdev_priv(dev);
1878         struct sockaddr *mac_addr = sa;
1879         struct hcp_ehea_port_cb0 *cb0;
1880         int ret;
1881         u64 hret;
1882
1883         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1884                 ret = -EADDRNOTAVAIL;
1885                 goto out;
1886         }
1887
1888         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1889         if (!cb0) {
1890                 pr_err("no mem for cb0\n");
1891                 ret = -ENOMEM;
1892                 goto out;
1893         }
1894
1895         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1896
1897         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1898
1899         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1900                                        port->logical_port_id, H_PORT_CB0,
1901                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1902         if (hret != H_SUCCESS) {
1903                 ret = -EIO;
1904                 goto out_free;
1905         }
1906
1907         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1908
1909         /* Deregister old MAC in pHYP */
1910         if (port->state == EHEA_PORT_UP) {
1911                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1912                 if (ret)
1913                         goto out_upregs;
1914         }
1915
1916         port->mac_addr = cb0->port_mac_addr << 16;
1917
1918         /* Register new MAC in pHYP */
1919         if (port->state == EHEA_PORT_UP) {
1920                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1921                 if (ret)
1922                         goto out_upregs;
1923         }
1924
1925         ret = 0;
1926
1927 out_upregs:
1928         ehea_update_bcmc_registrations();
1929 out_free:
1930         free_page((unsigned long)cb0);
1931 out:
1932         return ret;
1933 }
1934
1935 static void ehea_promiscuous_error(u64 hret, int enable)
1936 {
1937         if (hret == H_AUTHORITY)
1938                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1939                         enable == 1 ? "en" : "dis");
1940         else
1941                 pr_err("failed %sabling promiscuous mode\n",
1942                        enable == 1 ? "en" : "dis");
1943 }
1944
1945 static void ehea_promiscuous(struct net_device *dev, int enable)
1946 {
1947         struct ehea_port *port = netdev_priv(dev);
1948         struct hcp_ehea_port_cb7 *cb7;
1949         u64 hret;
1950
1951         if (enable == port->promisc)
1952                 return;
1953
1954         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1955         if (!cb7) {
1956                 pr_err("no mem for cb7\n");
1957                 goto out;
1958         }
1959
1960         /* Modify Pxs_DUCQPN in CB7 */
1961         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1962
1963         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1964                                        port->logical_port_id,
1965                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1966         if (hret) {
1967                 ehea_promiscuous_error(hret, enable);
1968                 goto out;
1969         }
1970
1971         port->promisc = enable;
1972 out:
1973         free_page((unsigned long)cb7);
1974 }
1975
1976 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1977                                      u32 hcallid)
1978 {
1979         u64 hret;
1980         u8 reg_type;
1981
1982         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1983                  | EHEA_BCMC_UNTAGGED;
1984
1985         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1986                                      port->logical_port_id,
1987                                      reg_type, mc_mac_addr, 0, hcallid);
1988         if (hret)
1989                 goto out;
1990
1991         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1992                  | EHEA_BCMC_VLANID_ALL;
1993
1994         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1995                                      port->logical_port_id,
1996                                      reg_type, mc_mac_addr, 0, hcallid);
1997 out:
1998         return hret;
1999 }
2000
2001 static int ehea_drop_multicast_list(struct net_device *dev)
2002 {
2003         struct ehea_port *port = netdev_priv(dev);
2004         struct ehea_mc_list *mc_entry = port->mc_list;
2005         struct list_head *pos;
2006         struct list_head *temp;
2007         int ret = 0;
2008         u64 hret;
2009
2010         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2011                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2012
2013                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2014                                                  H_DEREG_BCMC);
2015                 if (hret) {
2016                         pr_err("failed deregistering mcast MAC\n");
2017                         ret = -EIO;
2018                 }
2019
2020                 list_del(pos);
2021                 kfree(mc_entry);
2022         }
2023         return ret;
2024 }
2025
2026 static void ehea_allmulti(struct net_device *dev, int enable)
2027 {
2028         struct ehea_port *port = netdev_priv(dev);
2029         u64 hret;
2030
2031         if (!port->allmulti) {
2032                 if (enable) {
2033                         /* Enable ALLMULTI */
2034                         ehea_drop_multicast_list(dev);
2035                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2036                         if (!hret)
2037                                 port->allmulti = 1;
2038                         else
2039                                 netdev_err(dev,
2040                                            "failed enabling IFF_ALLMULTI\n");
2041                 }
2042         } else
2043                 if (!enable) {
2044                         /* Disable ALLMULTI */
2045                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2046                         if (!hret)
2047                                 port->allmulti = 0;
2048                         else
2049                                 netdev_err(dev,
2050                                            "failed disabling IFF_ALLMULTI\n");
2051                 }
2052 }
2053
2054 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2055 {
2056         struct ehea_mc_list *ehea_mcl_entry;
2057         u64 hret;
2058
2059         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2060         if (!ehea_mcl_entry) {
2061                 pr_err("no mem for mcl_entry\n");
2062                 return;
2063         }
2064
2065         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2066
2067         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2068
2069         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2070                                          H_REG_BCMC);
2071         if (!hret)
2072                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2073         else {
2074                 pr_err("failed registering mcast MAC\n");
2075                 kfree(ehea_mcl_entry);
2076         }
2077 }
2078
2079 static void ehea_set_multicast_list(struct net_device *dev)
2080 {
2081         struct ehea_port *port = netdev_priv(dev);
2082         struct netdev_hw_addr *ha;
2083         int ret;
2084
2085         if (dev->flags & IFF_PROMISC) {
2086                 ehea_promiscuous(dev, 1);
2087                 return;
2088         }
2089         ehea_promiscuous(dev, 0);
2090
2091         if (dev->flags & IFF_ALLMULTI) {
2092                 ehea_allmulti(dev, 1);
2093                 goto out;
2094         }
2095         ehea_allmulti(dev, 0);
2096
2097         if (!netdev_mc_empty(dev)) {
2098                 ret = ehea_drop_multicast_list(dev);
2099                 if (ret) {
2100                         /* Dropping the current multicast list failed.
2101                          * Enabling ALL_MULTI is the best we can do.
2102                          */
2103                         ehea_allmulti(dev, 1);
2104                 }
2105
2106                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2107                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2108                                 port->adapter->max_mc_mac);
2109                         goto out;
2110                 }
2111
2112                 netdev_for_each_mc_addr(ha, dev)
2113                         ehea_add_multicast_entry(port, ha->addr);
2114
2115         }
2116 out:
2117         ehea_update_bcmc_registrations();
2118 }
2119
2120 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2121 {
2122         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2123                 return -EINVAL;
2124         dev->mtu = new_mtu;
2125         return 0;
2126 }
2127
2128 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2129                        struct ehea_swqe *swqe, u32 lkey)
2130 {
2131         if (skb->protocol == htons(ETH_P_IP)) {
2132                 const struct iphdr *iph = ip_hdr(skb);
2133
2134                 /* IPv4 */
2135                 swqe->tx_control |= EHEA_SWQE_CRC
2136                                  | EHEA_SWQE_IP_CHECKSUM
2137                                  | EHEA_SWQE_TCP_CHECKSUM
2138                                  | EHEA_SWQE_IMM_DATA_PRESENT
2139                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2140
2141                 write_ip_start_end(swqe, skb);
2142
2143                 if (iph->protocol == IPPROTO_UDP) {
2144                         if ((iph->frag_off & IP_MF) ||
2145                             (iph->frag_off & IP_OFFSET))
2146                                 /* IP fragment, so don't change cs */
2147                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2148                         else
2149                                 write_udp_offset_end(swqe, skb);
2150                 } else if (iph->protocol == IPPROTO_TCP) {
2151                         write_tcp_offset_end(swqe, skb);
2152                 }
2153
2154                 /* icmp (big data) and ip segmentation packets (all other ip
2155                    packets) do not require any special handling */
2156
2157         } else {
2158                 /* Other Ethernet Protocol */
2159                 swqe->tx_control |= EHEA_SWQE_CRC
2160                                  | EHEA_SWQE_IMM_DATA_PRESENT
2161                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2162         }
2163
2164         write_swqe2_data(skb, dev, swqe, lkey);
2165 }
2166
2167 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2168                        struct ehea_swqe *swqe)
2169 {
2170         int nfrags = skb_shinfo(skb)->nr_frags;
2171         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2172         skb_frag_t *frag;
2173         int i;
2174
2175         if (skb->protocol == htons(ETH_P_IP)) {
2176                 const struct iphdr *iph = ip_hdr(skb);
2177
2178                 /* IPv4 */
2179                 write_ip_start_end(swqe, skb);
2180
2181                 if (iph->protocol == IPPROTO_TCP) {
2182                         swqe->tx_control |= EHEA_SWQE_CRC
2183                                          | EHEA_SWQE_IP_CHECKSUM
2184                                          | EHEA_SWQE_TCP_CHECKSUM
2185                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2186
2187                         write_tcp_offset_end(swqe, skb);
2188
2189                 } else if (iph->protocol == IPPROTO_UDP) {
2190                         if ((iph->frag_off & IP_MF) ||
2191                             (iph->frag_off & IP_OFFSET))
2192                                 /* IP fragment, so don't change cs */
2193                                 swqe->tx_control |= EHEA_SWQE_CRC
2194                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2195                         else {
2196                                 swqe->tx_control |= EHEA_SWQE_CRC
2197                                                  | EHEA_SWQE_IP_CHECKSUM
2198                                                  | EHEA_SWQE_TCP_CHECKSUM
2199                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2200
2201                                 write_udp_offset_end(swqe, skb);
2202                         }
2203                 } else {
2204                         /* icmp (big data) and
2205                            ip segmentation packets (all other ip packets) */
2206                         swqe->tx_control |= EHEA_SWQE_CRC
2207                                          | EHEA_SWQE_IP_CHECKSUM
2208                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2209                 }
2210         } else {
2211                 /* Other Ethernet Protocol */
2212                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2213         }
2214         /* copy (immediate) data */
2215         if (nfrags == 0) {
2216                 /* data is in a single piece */
2217                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2218         } else {
2219                 /* first copy data from the skb->data buffer ... */
2220                 skb_copy_from_linear_data(skb, imm_data,
2221                                           skb_headlen(skb));
2222                 imm_data += skb_headlen(skb);
2223
2224                 /* ... then copy data from the fragments */
2225                 for (i = 0; i < nfrags; i++) {
2226                         frag = &skb_shinfo(skb)->frags[i];
2227                         memcpy(imm_data,
2228                                page_address(frag->page) + frag->page_offset,
2229                                frag->size);
2230                         imm_data += frag->size;
2231                 }
2232         }
2233         swqe->immediate_data_length = skb->len;
2234         dev_kfree_skb(skb);
2235 }
2236
2237 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2238 {
2239         struct tcphdr *tcp;
2240         u32 tmp;
2241
2242         if ((skb->protocol == htons(ETH_P_IP)) &&
2243             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2244                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2245                                         (ip_hdr(skb)->ihl * 4));
2246                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2247                 tmp += ip_hdr(skb)->daddr % 31;
2248                 return tmp % num_qps;
2249         } else
2250                 return 0;
2251 }
2252
2253 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2254 {
2255         struct ehea_port *port = netdev_priv(dev);
2256         struct ehea_swqe *swqe;
2257         unsigned long flags;
2258         u32 lkey;
2259         int swqe_index;
2260         struct ehea_port_res *pr;
2261
2262         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2263
2264         if (!spin_trylock(&pr->xmit_lock))
2265                 return NETDEV_TX_BUSY;
2266
2267         if (pr->queue_stopped) {
2268                 spin_unlock(&pr->xmit_lock);
2269                 return NETDEV_TX_BUSY;
2270         }
2271
2272         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2273         memset(swqe, 0, SWQE_HEADER_SIZE);
2274         atomic_dec(&pr->swqe_avail);
2275
2276         if (vlan_tx_tag_present(skb)) {
2277                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2278                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2279         }
2280
2281         pr->tx_packets++;
2282         pr->tx_bytes += skb->len;
2283
2284         if (skb->len <= SWQE3_MAX_IMM) {
2285                 u32 sig_iv = port->sig_comp_iv;
2286                 u32 swqe_num = pr->swqe_id_counter;
2287                 ehea_xmit3(skb, dev, swqe);
2288                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2289                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2290                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2291                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2292                                                       sig_iv);
2293                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2294                         pr->swqe_ll_count = 0;
2295                 } else
2296                         pr->swqe_ll_count += 1;
2297         } else {
2298                 swqe->wr_id =
2299                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2300                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2301                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2302                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2303                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2304
2305                 pr->sq_skba.index++;
2306                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2307
2308                 lkey = pr->send_mr.lkey;
2309                 ehea_xmit2(skb, dev, swqe, lkey);
2310                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2311         }
2312         pr->swqe_id_counter += 1;
2313
2314         netif_info(port, tx_queued, dev,
2315                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2316         if (netif_msg_tx_queued(port))
2317                 ehea_dump(swqe, 512, "swqe");
2318
2319         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2320                 netif_stop_queue(dev);
2321                 swqe->tx_control |= EHEA_SWQE_PURGE;
2322         }
2323
2324         ehea_post_swqe(pr->qp, swqe);
2325
2326         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2327                 spin_lock_irqsave(&pr->netif_queue, flags);
2328                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2329                         pr->p_stats.queue_stopped++;
2330                         netif_stop_queue(dev);
2331                         pr->queue_stopped = 1;
2332                 }
2333                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2334         }
2335         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2336         spin_unlock(&pr->xmit_lock);
2337
2338         return NETDEV_TX_OK;
2339 }
2340
2341 static void ehea_vlan_rx_register(struct net_device *dev,
2342                                   struct vlan_group *grp)
2343 {
2344         struct ehea_port *port = netdev_priv(dev);
2345         struct ehea_adapter *adapter = port->adapter;
2346         struct hcp_ehea_port_cb1 *cb1;
2347         u64 hret;
2348
2349         port->vgrp = grp;
2350
2351         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2352         if (!cb1) {
2353                 pr_err("no mem for cb1\n");
2354                 goto out;
2355         }
2356
2357         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2358                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2359         if (hret != H_SUCCESS)
2360                 pr_err("modify_ehea_port failed\n");
2361
2362         free_page((unsigned long)cb1);
2363 out:
2364         return;
2365 }
2366
2367 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2368 {
2369         struct ehea_port *port = netdev_priv(dev);
2370         struct ehea_adapter *adapter = port->adapter;
2371         struct hcp_ehea_port_cb1 *cb1;
2372         int index;
2373         u64 hret;
2374
2375         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2376         if (!cb1) {
2377                 pr_err("no mem for cb1\n");
2378                 goto out;
2379         }
2380
2381         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2382                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2383         if (hret != H_SUCCESS) {
2384                 pr_err("query_ehea_port failed\n");
2385                 goto out;
2386         }
2387
2388         index = (vid / 64);
2389         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2390
2391         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2392                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2393         if (hret != H_SUCCESS)
2394                 pr_err("modify_ehea_port failed\n");
2395 out:
2396         free_page((unsigned long)cb1);
2397         return;
2398 }
2399
2400 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2401 {
2402         struct ehea_port *port = netdev_priv(dev);
2403         struct ehea_adapter *adapter = port->adapter;
2404         struct hcp_ehea_port_cb1 *cb1;
2405         int index;
2406         u64 hret;
2407
2408         vlan_group_set_device(port->vgrp, vid, NULL);
2409
2410         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2411         if (!cb1) {
2412                 pr_err("no mem for cb1\n");
2413                 goto out;
2414         }
2415
2416         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2417                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2418         if (hret != H_SUCCESS) {
2419                 pr_err("query_ehea_port failed\n");
2420                 goto out;
2421         }
2422
2423         index = (vid / 64);
2424         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2425
2426         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2427                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2428         if (hret != H_SUCCESS)
2429                 pr_err("modify_ehea_port failed\n");
2430 out:
2431         free_page((unsigned long)cb1);
2432 }
2433
2434 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2435 {
2436         int ret = -EIO;
2437         u64 hret;
2438         u16 dummy16 = 0;
2439         u64 dummy64 = 0;
2440         struct hcp_modify_qp_cb0 *cb0;
2441
2442         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2443         if (!cb0) {
2444                 ret = -ENOMEM;
2445                 goto out;
2446         }
2447
2448         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2449                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2450         if (hret != H_SUCCESS) {
2451                 pr_err("query_ehea_qp failed (1)\n");
2452                 goto out;
2453         }
2454
2455         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2456         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2457                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2458                                      &dummy64, &dummy64, &dummy16, &dummy16);
2459         if (hret != H_SUCCESS) {
2460                 pr_err("modify_ehea_qp failed (1)\n");
2461                 goto out;
2462         }
2463
2464         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2465                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2466         if (hret != H_SUCCESS) {
2467                 pr_err("query_ehea_qp failed (2)\n");
2468                 goto out;
2469         }
2470
2471         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2472         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2473                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2474                                      &dummy64, &dummy64, &dummy16, &dummy16);
2475         if (hret != H_SUCCESS) {
2476                 pr_err("modify_ehea_qp failed (2)\n");
2477                 goto out;
2478         }
2479
2480         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2481                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2482         if (hret != H_SUCCESS) {
2483                 pr_err("query_ehea_qp failed (3)\n");
2484                 goto out;
2485         }
2486
2487         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2488         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2489                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2490                                      &dummy64, &dummy64, &dummy16, &dummy16);
2491         if (hret != H_SUCCESS) {
2492                 pr_err("modify_ehea_qp failed (3)\n");
2493                 goto out;
2494         }
2495
2496         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2497                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2498         if (hret != H_SUCCESS) {
2499                 pr_err("query_ehea_qp failed (4)\n");
2500                 goto out;
2501         }
2502
2503         ret = 0;
2504 out:
2505         free_page((unsigned long)cb0);
2506         return ret;
2507 }
2508
2509 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2510                                int add_tx_qps)
2511 {
2512         int ret, i;
2513         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2514         enum ehea_eq_type eq_type = EHEA_EQ;
2515
2516         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2517                                    EHEA_MAX_ENTRIES_EQ, 1);
2518         if (!port->qp_eq) {
2519                 ret = -EINVAL;
2520                 pr_err("ehea_create_eq failed (qp_eq)\n");
2521                 goto out_kill_eq;
2522         }
2523
2524         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2525         pr_cfg.max_entries_scq = sq_entries * 2;
2526         pr_cfg.max_entries_sq = sq_entries;
2527         pr_cfg.max_entries_rq1 = rq1_entries;
2528         pr_cfg.max_entries_rq2 = rq2_entries;
2529         pr_cfg.max_entries_rq3 = rq3_entries;
2530
2531         pr_cfg_small_rx.max_entries_rcq = 1;
2532         pr_cfg_small_rx.max_entries_scq = sq_entries;
2533         pr_cfg_small_rx.max_entries_sq = sq_entries;
2534         pr_cfg_small_rx.max_entries_rq1 = 1;
2535         pr_cfg_small_rx.max_entries_rq2 = 1;
2536         pr_cfg_small_rx.max_entries_rq3 = 1;
2537
2538         for (i = 0; i < def_qps; i++) {
2539                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2540                 if (ret)
2541                         goto out_clean_pr;
2542         }
2543         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2544                 ret = ehea_init_port_res(port, &port->port_res[i],
2545                                          &pr_cfg_small_rx, i);
2546                 if (ret)
2547                         goto out_clean_pr;
2548         }
2549
2550         return 0;
2551
2552 out_clean_pr:
2553         while (--i >= 0)
2554                 ehea_clean_portres(port, &port->port_res[i]);
2555
2556 out_kill_eq:
2557         ehea_destroy_eq(port->qp_eq);
2558         return ret;
2559 }
2560
2561 static int ehea_clean_all_portres(struct ehea_port *port)
2562 {
2563         int ret = 0;
2564         int i;
2565
2566         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2567                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2568
2569         ret |= ehea_destroy_eq(port->qp_eq);
2570
2571         return ret;
2572 }
2573
2574 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2575 {
2576         if (adapter->active_ports)
2577                 return;
2578
2579         ehea_rem_mr(&adapter->mr);
2580 }
2581
2582 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2583 {
2584         if (adapter->active_ports)
2585                 return 0;
2586
2587         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2588 }
2589
2590 static int ehea_up(struct net_device *dev)
2591 {
2592         int ret, i;
2593         struct ehea_port *port = netdev_priv(dev);
2594
2595         if (port->state == EHEA_PORT_UP)
2596                 return 0;
2597
2598         ret = ehea_port_res_setup(port, port->num_def_qps,
2599                                   port->num_add_tx_qps);
2600         if (ret) {
2601                 netdev_err(dev, "port_res_failed\n");
2602                 goto out;
2603         }
2604
2605         /* Set default QP for this port */
2606         ret = ehea_configure_port(port);
2607         if (ret) {
2608                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2609                 goto out_clean_pr;
2610         }
2611
2612         ret = ehea_reg_interrupts(dev);
2613         if (ret) {
2614                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2615                 goto out_clean_pr;
2616         }
2617
2618         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2619                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2620                 if (ret) {
2621                         netdev_err(dev, "activate_qp failed\n");
2622                         goto out_free_irqs;
2623                 }
2624         }
2625
2626         for (i = 0; i < port->num_def_qps; i++) {
2627                 ret = ehea_fill_port_res(&port->port_res[i]);
2628                 if (ret) {
2629                         netdev_err(dev, "out_free_irqs\n");
2630                         goto out_free_irqs;
2631                 }
2632         }
2633
2634         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2635         if (ret) {
2636                 ret = -EIO;
2637                 goto out_free_irqs;
2638         }
2639
2640         port->state = EHEA_PORT_UP;
2641
2642         ret = 0;
2643         goto out;
2644
2645 out_free_irqs:
2646         ehea_free_interrupts(dev);
2647
2648 out_clean_pr:
2649         ehea_clean_all_portres(port);
2650 out:
2651         if (ret)
2652                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2653
2654         ehea_update_bcmc_registrations();
2655         ehea_update_firmware_handles();
2656
2657         return ret;
2658 }
2659
2660 static void port_napi_disable(struct ehea_port *port)
2661 {
2662         int i;
2663
2664         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2665                 napi_disable(&port->port_res[i].napi);
2666 }
2667
2668 static void port_napi_enable(struct ehea_port *port)
2669 {
2670         int i;
2671
2672         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2673                 napi_enable(&port->port_res[i].napi);
2674 }
2675
2676 static int ehea_open(struct net_device *dev)
2677 {
2678         int ret;
2679         struct ehea_port *port = netdev_priv(dev);
2680
2681         mutex_lock(&port->port_lock);
2682
2683         netif_info(port, ifup, dev, "enabling port\n");
2684
2685         ret = ehea_up(dev);
2686         if (!ret) {
2687                 port_napi_enable(port);
2688                 netif_start_queue(dev);
2689         }
2690
2691         init_waitqueue_head(&port->swqe_avail_wq);
2692         init_waitqueue_head(&port->restart_wq);
2693
2694         mutex_unlock(&port->port_lock);
2695
2696         return ret;
2697 }
2698
2699 static int ehea_down(struct net_device *dev)
2700 {
2701         int ret;
2702         struct ehea_port *port = netdev_priv(dev);
2703
2704         if (port->state == EHEA_PORT_DOWN)
2705                 return 0;
2706
2707         ehea_drop_multicast_list(dev);
2708         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2709
2710         ehea_free_interrupts(dev);
2711
2712         port->state = EHEA_PORT_DOWN;
2713
2714         ehea_update_bcmc_registrations();
2715
2716         ret = ehea_clean_all_portres(port);
2717         if (ret)
2718                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2719
2720         ehea_update_firmware_handles();
2721
2722         return ret;
2723 }
2724
2725 static int ehea_stop(struct net_device *dev)
2726 {
2727         int ret;
2728         struct ehea_port *port = netdev_priv(dev);
2729
2730         netif_info(port, ifdown, dev, "disabling port\n");
2731
2732         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2733         cancel_work_sync(&port->reset_task);
2734         mutex_lock(&port->port_lock);
2735         netif_stop_queue(dev);
2736         port_napi_disable(port);
2737         ret = ehea_down(dev);
2738         mutex_unlock(&port->port_lock);
2739         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2740         return ret;
2741 }
2742
2743 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2744 {
2745         struct ehea_qp qp = *orig_qp;
2746         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2747         struct ehea_swqe *swqe;
2748         int wqe_index;
2749         int i;
2750
2751         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2752                 swqe = ehea_get_swqe(&qp, &wqe_index);
2753                 swqe->tx_control |= EHEA_SWQE_PURGE;
2754         }
2755 }
2756
2757 static void ehea_flush_sq(struct ehea_port *port)
2758 {
2759         int i;
2760
2761         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2762                 struct ehea_port_res *pr = &port->port_res[i];
2763                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2764                 int ret;
2765
2766                 ret = wait_event_timeout(port->swqe_avail_wq,
2767                          atomic_read(&pr->swqe_avail) >= swqe_max,
2768                          msecs_to_jiffies(100));
2769
2770                 if (!ret) {
2771                         pr_err("WARNING: sq not flushed completely\n");
2772                         break;
2773                 }
2774         }
2775 }
2776
2777 int ehea_stop_qps(struct net_device *dev)
2778 {
2779         struct ehea_port *port = netdev_priv(dev);
2780         struct ehea_adapter *adapter = port->adapter;
2781         struct hcp_modify_qp_cb0 *cb0;
2782         int ret = -EIO;
2783         int dret;
2784         int i;
2785         u64 hret;
2786         u64 dummy64 = 0;
2787         u16 dummy16 = 0;
2788
2789         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2790         if (!cb0) {
2791                 ret = -ENOMEM;
2792                 goto out;
2793         }
2794
2795         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2796                 struct ehea_port_res *pr =  &port->port_res[i];
2797                 struct ehea_qp *qp = pr->qp;
2798
2799                 /* Purge send queue */
2800                 ehea_purge_sq(qp);
2801
2802                 /* Disable queue pair */
2803                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2804                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2805                                             cb0);
2806                 if (hret != H_SUCCESS) {
2807                         pr_err("query_ehea_qp failed (1)\n");
2808                         goto out;
2809                 }
2810
2811                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2812                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2813
2814                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2815                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2816                                                             1), cb0, &dummy64,
2817                                              &dummy64, &dummy16, &dummy16);
2818                 if (hret != H_SUCCESS) {
2819                         pr_err("modify_ehea_qp failed (1)\n");
2820                         goto out;
2821                 }
2822
2823                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2824                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2825                                             cb0);
2826                 if (hret != H_SUCCESS) {
2827                         pr_err("query_ehea_qp failed (2)\n");
2828                         goto out;
2829                 }
2830
2831                 /* deregister shared memory regions */
2832                 dret = ehea_rem_smrs(pr);
2833                 if (dret) {
2834                         pr_err("unreg shared memory region failed\n");
2835                         goto out;
2836                 }
2837         }
2838
2839         ret = 0;
2840 out:
2841         free_page((unsigned long)cb0);
2842
2843         return ret;
2844 }
2845
2846 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2847 {
2848         struct ehea_qp qp = *orig_qp;
2849         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2850         struct ehea_rwqe *rwqe;
2851         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2852         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2853         struct sk_buff *skb;
2854         u32 lkey = pr->recv_mr.lkey;
2855
2856
2857         int i;
2858         int index;
2859
2860         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2861                 rwqe = ehea_get_next_rwqe(&qp, 2);
2862                 rwqe->sg_list[0].l_key = lkey;
2863                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2864                 skb = skba_rq2[index];
2865                 if (skb)
2866                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2867         }
2868
2869         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2870                 rwqe = ehea_get_next_rwqe(&qp, 3);
2871                 rwqe->sg_list[0].l_key = lkey;
2872                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2873                 skb = skba_rq3[index];
2874                 if (skb)
2875                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2876         }
2877 }
2878
2879 int ehea_restart_qps(struct net_device *dev)
2880 {
2881         struct ehea_port *port = netdev_priv(dev);
2882         struct ehea_adapter *adapter = port->adapter;
2883         int ret = 0;
2884         int i;
2885
2886         struct hcp_modify_qp_cb0 *cb0;
2887         u64 hret;
2888         u64 dummy64 = 0;
2889         u16 dummy16 = 0;
2890
2891         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2892         if (!cb0) {
2893                 ret = -ENOMEM;
2894                 goto out;
2895         }
2896
2897         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2898                 struct ehea_port_res *pr =  &port->port_res[i];
2899                 struct ehea_qp *qp = pr->qp;
2900
2901                 ret = ehea_gen_smrs(pr);
2902                 if (ret) {
2903                         netdev_err(dev, "creation of shared memory regions failed\n");
2904                         goto out;
2905                 }
2906
2907                 ehea_update_rqs(qp, pr);
2908
2909                 /* Enable queue pair */
2910                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2911                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2912                                             cb0);
2913                 if (hret != H_SUCCESS) {
2914                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2915                         goto out;
2916                 }
2917
2918                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2919                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2920
2921                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2922                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2923                                                             1), cb0, &dummy64,
2924                                              &dummy64, &dummy16, &dummy16);
2925                 if (hret != H_SUCCESS) {
2926                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2927                         goto out;
2928                 }
2929
2930                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2931                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2932                                             cb0);
2933                 if (hret != H_SUCCESS) {
2934                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2935                         goto out;
2936                 }
2937
2938                 /* refill entire queue */
2939                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2940                 ehea_refill_rq2(pr, 0);
2941                 ehea_refill_rq3(pr, 0);
2942         }
2943 out:
2944         free_page((unsigned long)cb0);
2945
2946         return ret;
2947 }
2948
2949 static void ehea_reset_port(struct work_struct *work)
2950 {
2951         int ret;
2952         struct ehea_port *port =
2953                 container_of(work, struct ehea_port, reset_task);
2954         struct net_device *dev = port->netdev;
2955
2956         mutex_lock(&dlpar_mem_lock);
2957         port->resets++;
2958         mutex_lock(&port->port_lock);
2959         netif_stop_queue(dev);
2960
2961         port_napi_disable(port);
2962
2963         ehea_down(dev);
2964
2965         ret = ehea_up(dev);
2966         if (ret)
2967                 goto out;
2968
2969         ehea_set_multicast_list(dev);
2970
2971         netif_info(port, timer, dev, "reset successful\n");
2972
2973         port_napi_enable(port);
2974
2975         netif_wake_queue(dev);
2976 out:
2977         mutex_unlock(&port->port_lock);
2978         mutex_unlock(&dlpar_mem_lock);
2979 }
2980
2981 static void ehea_rereg_mrs(void)
2982 {
2983         int ret, i;
2984         struct ehea_adapter *adapter;
2985
2986         pr_info("LPAR memory changed - re-initializing driver\n");
2987
2988         list_for_each_entry(adapter, &adapter_list, list)
2989                 if (adapter->active_ports) {
2990                         /* Shutdown all ports */
2991                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2992                                 struct ehea_port *port = adapter->port[i];
2993                                 struct net_device *dev;
2994
2995                                 if (!port)
2996                                         continue;
2997
2998                                 dev = port->netdev;
2999
3000                                 if (dev->flags & IFF_UP) {
3001                                         mutex_lock(&port->port_lock);
3002                                         netif_stop_queue(dev);
3003                                         ehea_flush_sq(port);
3004                                         ret = ehea_stop_qps(dev);
3005                                         if (ret) {
3006                                                 mutex_unlock(&port->port_lock);
3007                                                 goto out;
3008                                         }
3009                                         port_napi_disable(port);
3010                                         mutex_unlock(&port->port_lock);
3011                                 }
3012                                 reset_sq_restart_flag(port);
3013                         }
3014
3015                         /* Unregister old memory region */
3016                         ret = ehea_rem_mr(&adapter->mr);
3017                         if (ret) {
3018                                 pr_err("unregister MR failed - driver inoperable!\n");
3019                                 goto out;
3020                         }
3021                 }
3022
3023         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3024
3025         list_for_each_entry(adapter, &adapter_list, list)
3026                 if (adapter->active_ports) {
3027                         /* Register new memory region */
3028                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3029                         if (ret) {
3030                                 pr_err("register MR failed - driver inoperable!\n");
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                                                 ret = ehea_restart_qps(dev);
3044                                                 if (!ret) {
3045                                                         check_sqs(port);
3046                                                         port_napi_enable(port);
3047                                                         netif_wake_queue(dev);
3048                                                 } else {
3049                                                         netdev_err(dev, "Unable to restart QPS\n");
3050                                                 }
3051                                                 mutex_unlock(&port->port_lock);
3052                                         }
3053                                 }
3054                         }
3055                 }
3056         pr_info("re-initializing driver complete\n");
3057 out:
3058         return;
3059 }
3060
3061 static void ehea_tx_watchdog(struct net_device *dev)
3062 {
3063         struct ehea_port *port = netdev_priv(dev);
3064
3065         if (netif_carrier_ok(dev) &&
3066             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3067                 ehea_schedule_port_reset(port);
3068 }
3069
3070 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3071 {
3072         struct hcp_query_ehea *cb;
3073         u64 hret;
3074         int ret;
3075
3076         cb = (void *)get_zeroed_page(GFP_KERNEL);
3077         if (!cb) {
3078                 ret = -ENOMEM;
3079                 goto out;
3080         }
3081
3082         hret = ehea_h_query_ehea(adapter->handle, cb);
3083
3084         if (hret != H_SUCCESS) {
3085                 ret = -EIO;
3086                 goto out_herr;
3087         }
3088
3089         adapter->max_mc_mac = cb->max_mc_mac - 1;
3090         ret = 0;
3091
3092 out_herr:
3093         free_page((unsigned long)cb);
3094 out:
3095         return ret;
3096 }
3097
3098 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3099 {
3100         struct hcp_ehea_port_cb4 *cb4;
3101         u64 hret;
3102         int ret = 0;
3103
3104         *jumbo = 0;
3105
3106         /* (Try to) enable *jumbo frames */
3107         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3108         if (!cb4) {
3109                 pr_err("no mem for cb4\n");
3110                 ret = -ENOMEM;
3111                 goto out;
3112         } else {
3113                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3114                                               port->logical_port_id,
3115                                               H_PORT_CB4,
3116                                               H_PORT_CB4_JUMBO, cb4);
3117                 if (hret == H_SUCCESS) {
3118                         if (cb4->jumbo_frame)
3119                                 *jumbo = 1;
3120                         else {
3121                                 cb4->jumbo_frame = 1;
3122                                 hret = ehea_h_modify_ehea_port(port->adapter->
3123                                                                handle,
3124                                                                port->
3125                                                                logical_port_id,
3126                                                                H_PORT_CB4,
3127                                                                H_PORT_CB4_JUMBO,
3128                                                                cb4);
3129                                 if (hret == H_SUCCESS)
3130                                         *jumbo = 1;
3131                         }
3132                 } else
3133                         ret = -EINVAL;
3134
3135                 free_page((unsigned long)cb4);
3136         }
3137 out:
3138         return ret;
3139 }
3140
3141 static ssize_t ehea_show_port_id(struct device *dev,
3142                                  struct device_attribute *attr, char *buf)
3143 {
3144         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3145         return sprintf(buf, "%d", port->logical_port_id);
3146 }
3147
3148 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3149                    NULL);
3150
3151 static void __devinit logical_port_release(struct device *dev)
3152 {
3153         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3154         of_node_put(port->ofdev.dev.of_node);
3155 }
3156
3157 static struct device *ehea_register_port(struct ehea_port *port,
3158                                          struct device_node *dn)
3159 {
3160         int ret;
3161
3162         port->ofdev.dev.of_node = of_node_get(dn);
3163         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3164         port->ofdev.dev.bus = &ibmebus_bus_type;
3165
3166         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3167         port->ofdev.dev.release = logical_port_release;
3168
3169         ret = of_device_register(&port->ofdev);
3170         if (ret) {
3171                 pr_err("failed to register device. ret=%d\n", ret);
3172                 goto out;
3173         }
3174
3175         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3176         if (ret) {
3177                 pr_err("failed to register attributes, ret=%d\n", ret);
3178                 goto out_unreg_of_dev;
3179         }
3180
3181         return &port->ofdev.dev;
3182
3183 out_unreg_of_dev:
3184         of_device_unregister(&port->ofdev);
3185 out:
3186         return NULL;
3187 }
3188
3189 static void ehea_unregister_port(struct ehea_port *port)
3190 {
3191         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3192         of_device_unregister(&port->ofdev);
3193 }
3194
3195 static const struct net_device_ops ehea_netdev_ops = {
3196         .ndo_open               = ehea_open,
3197         .ndo_stop               = ehea_stop,
3198         .ndo_start_xmit         = ehea_start_xmit,
3199 #ifdef CONFIG_NET_POLL_CONTROLLER
3200         .ndo_poll_controller    = ehea_netpoll,
3201 #endif
3202         .ndo_get_stats          = ehea_get_stats,
3203         .ndo_set_mac_address    = ehea_set_mac_addr,
3204         .ndo_validate_addr      = eth_validate_addr,
3205         .ndo_set_multicast_list = ehea_set_multicast_list,
3206         .ndo_change_mtu         = ehea_change_mtu,
3207         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3208         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3209         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3210         .ndo_tx_timeout         = ehea_tx_watchdog,
3211 };
3212
3213 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3214                                          u32 logical_port_id,
3215                                          struct device_node *dn)
3216 {
3217         int ret;
3218         struct net_device *dev;
3219         struct ehea_port *port;
3220         struct device *port_dev;
3221         int jumbo;
3222
3223         /* allocate memory for the port structures */
3224         dev = alloc_etherdev(sizeof(struct ehea_port));
3225
3226         if (!dev) {
3227                 pr_err("no mem for net_device\n");
3228                 ret = -ENOMEM;
3229                 goto out_err;
3230         }
3231
3232         port = netdev_priv(dev);
3233
3234         mutex_init(&port->port_lock);
3235         port->state = EHEA_PORT_DOWN;
3236         port->sig_comp_iv = sq_entries / 10;
3237
3238         port->adapter = adapter;
3239         port->netdev = dev;
3240         port->logical_port_id = logical_port_id;
3241
3242         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3243
3244         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3245         if (!port->mc_list) {
3246                 ret = -ENOMEM;
3247                 goto out_free_ethdev;
3248         }
3249
3250         INIT_LIST_HEAD(&port->mc_list->list);
3251
3252         ret = ehea_sense_port_attr(port);
3253         if (ret)
3254                 goto out_free_mc_list;
3255
3256         port_dev = ehea_register_port(port, dn);
3257         if (!port_dev)
3258                 goto out_free_mc_list;
3259
3260         SET_NETDEV_DEV(dev, port_dev);
3261
3262         /* initialize net_device structure */
3263         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3264
3265         dev->netdev_ops = &ehea_netdev_ops;
3266         ehea_set_ethtool_ops(dev);
3267
3268         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3269                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3270                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3271                       | NETIF_F_LLTX;
3272         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3273
3274         if (use_lro)
3275                 dev->features |= NETIF_F_LRO;
3276
3277         INIT_WORK(&port->reset_task, ehea_reset_port);
3278
3279         ret = register_netdev(dev);
3280         if (ret) {
3281                 pr_err("register_netdev failed. ret=%d\n", ret);
3282                 goto out_unreg_port;
3283         }
3284
3285         port->lro_max_aggr = lro_max_aggr;
3286
3287         ret = ehea_get_jumboframe_status(port, &jumbo);
3288         if (ret)
3289                 netdev_err(dev, "failed determining jumbo frame status\n");
3290
3291         netdev_info(dev, "Jumbo frames are %sabled\n",
3292                     jumbo == 1 ? "en" : "dis");
3293
3294         adapter->active_ports++;
3295
3296         return port;
3297
3298 out_unreg_port:
3299         ehea_unregister_port(port);
3300
3301 out_free_mc_list:
3302         kfree(port->mc_list);
3303
3304 out_free_ethdev:
3305         free_netdev(dev);
3306
3307 out_err:
3308         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3309                logical_port_id, ret);
3310         return NULL;
3311 }
3312
3313 static void ehea_shutdown_single_port(struct ehea_port *port)
3314 {
3315         struct ehea_adapter *adapter = port->adapter;
3316
3317         cancel_work_sync(&port->reset_task);
3318         unregister_netdev(port->netdev);
3319         ehea_unregister_port(port);
3320         kfree(port->mc_list);
3321         free_netdev(port->netdev);
3322         adapter->active_ports--;
3323 }
3324
3325 static int ehea_setup_ports(struct ehea_adapter *adapter)
3326 {
3327         struct device_node *lhea_dn;
3328         struct device_node *eth_dn = NULL;
3329
3330         const u32 *dn_log_port_id;
3331         int i = 0;
3332
3333         lhea_dn = adapter->ofdev->dev.of_node;
3334         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3335
3336                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3337                                                  NULL);
3338                 if (!dn_log_port_id) {
3339                         pr_err("bad device node: eth_dn name=%s\n",
3340                                eth_dn->full_name);
3341                         continue;
3342                 }
3343
3344                 if (ehea_add_adapter_mr(adapter)) {
3345                         pr_err("creating MR failed\n");
3346                         of_node_put(eth_dn);
3347                         return -EIO;
3348                 }
3349
3350                 adapter->port[i] = ehea_setup_single_port(adapter,
3351                                                           *dn_log_port_id,
3352                                                           eth_dn);
3353                 if (adapter->port[i])
3354                         netdev_info(adapter->port[i]->netdev,
3355                                     "logical port id #%d\n", *dn_log_port_id);
3356                 else
3357                         ehea_remove_adapter_mr(adapter);
3358
3359                 i++;
3360         }
3361         return 0;
3362 }
3363
3364 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3365                                            u32 logical_port_id)
3366 {
3367         struct device_node *lhea_dn;
3368         struct device_node *eth_dn = NULL;
3369         const u32 *dn_log_port_id;
3370
3371         lhea_dn = adapter->ofdev->dev.of_node;
3372         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3373
3374                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3375                                                  NULL);
3376                 if (dn_log_port_id)
3377                         if (*dn_log_port_id == logical_port_id)
3378                                 return eth_dn;
3379         }
3380
3381         return NULL;
3382 }
3383
3384 static ssize_t ehea_probe_port(struct device *dev,
3385                                struct device_attribute *attr,
3386                                const char *buf, size_t count)
3387 {
3388         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3389         struct ehea_port *port;
3390         struct device_node *eth_dn = NULL;
3391         int i;
3392
3393         u32 logical_port_id;
3394
3395         sscanf(buf, "%d", &logical_port_id);
3396
3397         port = ehea_get_port(adapter, logical_port_id);
3398
3399         if (port) {
3400                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3401                             logical_port_id);
3402                 return -EINVAL;
3403         }
3404
3405         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3406
3407         if (!eth_dn) {
3408                 pr_info("no logical port with id %d found\n", logical_port_id);
3409                 return -EINVAL;
3410         }
3411
3412         if (ehea_add_adapter_mr(adapter)) {
3413                 pr_err("creating MR failed\n");
3414                 return -EIO;
3415         }
3416
3417         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3418
3419         of_node_put(eth_dn);
3420
3421         if (port) {
3422                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3423                         if (!adapter->port[i]) {
3424                                 adapter->port[i] = port;
3425                                 break;
3426                         }
3427
3428                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3429                             logical_port_id);
3430         } else {
3431                 ehea_remove_adapter_mr(adapter);
3432                 return -EIO;
3433         }
3434
3435         return (ssize_t) count;
3436 }
3437
3438 static ssize_t ehea_remove_port(struct device *dev,
3439                                 struct device_attribute *attr,
3440                                 const char *buf, size_t count)
3441 {
3442         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3443         struct ehea_port *port;
3444         int i;
3445         u32 logical_port_id;
3446
3447         sscanf(buf, "%d", &logical_port_id);
3448
3449         port = ehea_get_port(adapter, logical_port_id);
3450
3451         if (port) {
3452                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3453                             logical_port_id);
3454
3455                 ehea_shutdown_single_port(port);
3456
3457                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3458                         if (adapter->port[i] == port) {
3459                                 adapter->port[i] = NULL;
3460                                 break;
3461                         }
3462         } else {
3463                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3464                        logical_port_id);
3465                 return -EINVAL;
3466         }
3467
3468         ehea_remove_adapter_mr(adapter);
3469
3470         return (ssize_t) count;
3471 }
3472
3473 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3474 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3475
3476 int ehea_create_device_sysfs(struct platform_device *dev)
3477 {
3478         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3479         if (ret)
3480                 goto out;
3481
3482         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3483 out:
3484         return ret;
3485 }
3486
3487 void ehea_remove_device_sysfs(struct platform_device *dev)
3488 {
3489         device_remove_file(&dev->dev, &dev_attr_probe_port);
3490         device_remove_file(&dev->dev, &dev_attr_remove_port);
3491 }
3492
3493 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3494                                         const struct of_device_id *id)
3495 {
3496         struct ehea_adapter *adapter;
3497         const u64 *adapter_handle;
3498         int ret;
3499
3500         if (!dev || !dev->dev.of_node) {
3501                 pr_err("Invalid ibmebus device probed\n");
3502                 return -EINVAL;
3503         }
3504
3505         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3506         if (!adapter) {
3507                 ret = -ENOMEM;
3508                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3509                 goto out;
3510         }
3511
3512         list_add(&adapter->list, &adapter_list);
3513
3514         adapter->ofdev = dev;
3515
3516         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3517                                          NULL);
3518         if (adapter_handle)
3519                 adapter->handle = *adapter_handle;
3520
3521         if (!adapter->handle) {
3522                 dev_err(&dev->dev, "failed getting handle for adapter"
3523                         " '%s'\n", dev->dev.of_node->full_name);
3524                 ret = -ENODEV;
3525                 goto out_free_ad;
3526         }
3527
3528         adapter->pd = EHEA_PD_ID;
3529
3530         dev_set_drvdata(&dev->dev, adapter);
3531
3532
3533         /* initialize adapter and ports */
3534         /* get adapter properties */
3535         ret = ehea_sense_adapter_attr(adapter);
3536         if (ret) {
3537                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3538                 goto out_free_ad;
3539         }
3540
3541         adapter->neq = ehea_create_eq(adapter,
3542                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3543         if (!adapter->neq) {
3544                 ret = -EIO;
3545                 dev_err(&dev->dev, "NEQ creation failed\n");
3546                 goto out_free_ad;
3547         }
3548
3549         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3550                      (unsigned long)adapter);
3551
3552         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3553                                   ehea_interrupt_neq, IRQF_DISABLED,
3554                                   "ehea_neq", adapter);
3555         if (ret) {
3556                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3557                 goto out_kill_eq;
3558         }
3559
3560         ret = ehea_create_device_sysfs(dev);
3561         if (ret)
3562                 goto out_free_irq;
3563
3564         ret = ehea_setup_ports(adapter);
3565         if (ret) {
3566                 dev_err(&dev->dev, "setup_ports failed\n");
3567                 goto out_rem_dev_sysfs;
3568         }
3569
3570         ret = 0;
3571         goto out;
3572
3573 out_rem_dev_sysfs:
3574         ehea_remove_device_sysfs(dev);
3575
3576 out_free_irq:
3577         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3578
3579 out_kill_eq:
3580         ehea_destroy_eq(adapter->neq);
3581
3582 out_free_ad:
3583         list_del(&adapter->list);
3584         kfree(adapter);
3585
3586 out:
3587         ehea_update_firmware_handles();
3588
3589         return ret;
3590 }
3591
3592 static int __devexit ehea_remove(struct platform_device *dev)
3593 {
3594         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3595         int i;
3596
3597         for (i = 0; i < EHEA_MAX_PORTS; i++)
3598                 if (adapter->port[i]) {
3599                         ehea_shutdown_single_port(adapter->port[i]);
3600                         adapter->port[i] = NULL;
3601                 }
3602
3603         ehea_remove_device_sysfs(dev);
3604
3605         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3606         tasklet_kill(&adapter->neq_tasklet);
3607
3608         ehea_destroy_eq(adapter->neq);
3609         ehea_remove_adapter_mr(adapter);
3610         list_del(&adapter->list);
3611         kfree(adapter);
3612
3613         ehea_update_firmware_handles();
3614
3615         return 0;
3616 }
3617
3618 void ehea_crash_handler(void)
3619 {
3620         int i;
3621
3622         if (ehea_fw_handles.arr)
3623                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3624                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3625                                              ehea_fw_handles.arr[i].fwh,
3626                                              FORCE_FREE);
3627
3628         if (ehea_bcmc_regs.arr)
3629                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3630                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3631                                               ehea_bcmc_regs.arr[i].port_id,
3632                                               ehea_bcmc_regs.arr[i].reg_type,
3633                                               ehea_bcmc_regs.arr[i].macaddr,
3634                                               0, H_DEREG_BCMC);
3635 }
3636
3637 static int ehea_mem_notifier(struct notifier_block *nb,
3638                              unsigned long action, void *data)
3639 {
3640         int ret = NOTIFY_BAD;
3641         struct memory_notify *arg = data;
3642
3643         mutex_lock(&dlpar_mem_lock);
3644
3645         switch (action) {
3646         case MEM_CANCEL_OFFLINE:
3647                 pr_info("memory offlining canceled");
3648                 /* Readd canceled memory block */
3649         case MEM_ONLINE:
3650                 pr_info("memory is going online");
3651                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3652                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3653                         goto out_unlock;
3654                 ehea_rereg_mrs();
3655                 break;
3656         case MEM_GOING_OFFLINE:
3657                 pr_info("memory is going offline");
3658                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3659                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3660                         goto out_unlock;
3661                 ehea_rereg_mrs();
3662                 break;
3663         default:
3664                 break;
3665         }
3666
3667         ehea_update_firmware_handles();
3668         ret = NOTIFY_OK;
3669
3670 out_unlock:
3671         mutex_unlock(&dlpar_mem_lock);
3672         return ret;
3673 }
3674
3675 static struct notifier_block ehea_mem_nb = {
3676         .notifier_call = ehea_mem_notifier,
3677 };
3678
3679 static int ehea_reboot_notifier(struct notifier_block *nb,
3680                                 unsigned long action, void *unused)
3681 {
3682         if (action == SYS_RESTART) {
3683                 pr_info("Reboot: freeing all eHEA resources\n");
3684                 ibmebus_unregister_driver(&ehea_driver);
3685         }
3686         return NOTIFY_DONE;
3687 }
3688
3689 static struct notifier_block ehea_reboot_nb = {
3690         .notifier_call = ehea_reboot_notifier,
3691 };
3692
3693 static int check_module_parm(void)
3694 {
3695         int ret = 0;
3696
3697         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3698             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3699                 pr_info("Bad parameter: rq1_entries\n");
3700                 ret = -EINVAL;
3701         }
3702         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3703             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3704                 pr_info("Bad parameter: rq2_entries\n");
3705                 ret = -EINVAL;
3706         }
3707         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3708             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3709                 pr_info("Bad parameter: rq3_entries\n");
3710                 ret = -EINVAL;
3711         }
3712         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3713             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3714                 pr_info("Bad parameter: sq_entries\n");
3715                 ret = -EINVAL;
3716         }
3717
3718         return ret;
3719 }
3720
3721 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3722                                       char *buf)
3723 {
3724         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3725 }
3726
3727 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3728                    ehea_show_capabilities, NULL);
3729
3730 int __init ehea_module_init(void)
3731 {
3732         int ret;
3733
3734         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3735
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                 pr_info("failed registering reboot notifier\n");
3753
3754         ret = register_memory_notifier(&ehea_mem_nb);
3755         if (ret)
3756                 pr_info("failed registering memory remove notifier\n");
3757
3758         ret = crash_shutdown_register(ehea_crash_handler);
3759         if (ret)
3760                 pr_info("failed registering crash handler\n");
3761
3762         ret = ibmebus_register_driver(&ehea_driver);
3763         if (ret) {
3764                 pr_err("failed registering eHEA device driver on ebus\n");
3765                 goto out2;
3766         }
3767
3768         ret = driver_create_file(&ehea_driver.driver,
3769                                  &driver_attr_capabilities);
3770         if (ret) {
3771                 pr_err("failed to register capabilities attribute, ret=%d\n",
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         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3793         ibmebus_unregister_driver(&ehea_driver);
3794         unregister_reboot_notifier(&ehea_reboot_nb);
3795         ret = crash_shutdown_unregister(ehea_crash_handler);
3796         if (ret)
3797                 pr_info("failed unregistering crash handler\n");
3798         unregister_memory_notifier(&ehea_mem_nb);
3799         kfree(ehea_fw_handles.arr);
3800         kfree(ehea_bcmc_regs.arr);
3801         ehea_destroy_busmap();
3802 }
3803
3804 module_init(ehea_module_init);
3805 module_exit(ehea_module_exit);