drivers/net/ehea/ehea_main.c

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