drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/slab.h>
  36 #include <linux/if_ether.h>
  37 #include <linux/notifier.h>
  38 #include <linux/reboot.h>
  39 #include <linux/memory.h>
  40 #include <asm/kexec.h>
  41 #include <linux/mutex.h>
  42
  43 #include <net/ip.h>
  44
  45 #include "ehea.h"
  46 #include "ehea_qmr.h"
  47 #include "ehea_phyp.h"
  48
  49
  50 MODULE_LICENSE("GPL");
  51 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  52 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  53 MODULE_VERSION(DRV_VERSION);
  54
  55
  56 static int msg_level = -1;
  57 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  58 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  59 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  60 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  61 static int use_mcs;
  62 static int use_lro;
  63 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  64 static int num_tx_qps = EHEA_NUM_TX_QP;
  65 static int prop_carrier_state;
  66
  67 module_param(msg_level, int, 0);
  68 module_param(rq1_entries, int, 0);
  69 module_param(rq2_entries, int, 0);
  70 module_param(rq3_entries, int, 0);
  71 module_param(sq_entries, int, 0);
  72 module_param(prop_carrier_state, int, 0);
  73 module_param(use_mcs, int, 0);
  74 module_param(use_lro, int, 0);
  75 module_param(lro_max_aggr, int, 0);
  76 module_param(num_tx_qps, int, 0);
  77
  78 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  79 MODULE_PARM_DESC(msg_level, "msg_level");
  80 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  81                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  82 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  83                  "[2^x - 1], x = [6..14]. Default = "
  84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  85 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  88 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  91 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  94 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  95
  96 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  97                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  98 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  99                  "Default = 0");
 100
 101 static int port_name_cnt;
 102 static LIST_HEAD(adapter_list);
 103 static unsigned long ehea_driver_flags;
 104 struct work_struct ehea_rereg_mr_task;
 105 static DEFINE_MUTEX(dlpar_mem_lock);
 106 struct ehea_fw_handle_array ehea_fw_handles;
 107 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 108
 109
 110 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 111                                         const struct of_device_id *id);
 112
 113 static int __devexit ehea_remove(struct platform_device *dev);
 114
 115 static struct of_device_id ehea_device_table[] = {
 116         {
 117                 .name = "lhea",
 118                 .compatible = "IBM,lhea",
 119         },
 120         {},
 121 };
 122 MODULE_DEVICE_TABLE(of, ehea_device_table);
 123
 124 static struct of_platform_driver ehea_driver = {
 125         .driver = {
 126                 .name = "ehea",
 127                 .owner = THIS_MODULE,
 128                 .of_match_table = ehea_device_table,
 129         },
 130         .probe = ehea_probe_adapter,
 131         .remove = ehea_remove,
 132 };
 133
 134 void ehea_dump(void *adr, int len, char *msg)
 135 {
 136         int x;
 137         unsigned char *deb = adr;
 138         for (x = 0; x < len; x += 16) {
 139                 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
 140                           deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 141                 deb += 16;
 142         }
 143 }
 144
 145 void ehea_schedule_port_reset(struct ehea_port *port)
 146 {
 147         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 148                 schedule_work(&port->reset_task);
 149 }
 150
 151 static void ehea_update_firmware_handles(void)
 152 {
 153         struct ehea_fw_handle_entry *arr = NULL;
 154         struct ehea_adapter *adapter;
 155         int num_adapters = 0;
 156         int num_ports = 0;
 157         int num_portres = 0;
 158         int i = 0;
 159         int num_fw_handles, k, l;
 160
 161         /* Determine number of handles */
 162         mutex_lock(&ehea_fw_handles.lock);
 163
 164         list_for_each_entry(adapter, &adapter_list, list) {
 165                 num_adapters++;
 166
 167                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 168                         struct ehea_port *port = adapter->port[k];
 169
 170                         if (!port || (port->state != EHEA_PORT_UP))
 171                                 continue;
 172
 173                         num_ports++;
 174                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 175                 }
 176         }
 177
 178         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 179                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 180                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 181
 182         if (num_fw_handles) {
 183                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 184                 if (!arr)
 185                         goto out;  /* Keep the existing array */
 186         } else
 187                 goto out_update;
 188
 189         list_for_each_entry(adapter, &adapter_list, list) {
 190                 if (num_adapters == 0)
 191                         break;
 192
 193                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 194                         struct ehea_port *port = adapter->port[k];
 195
 196                         if (!port || (port->state != EHEA_PORT_UP) ||
 197                             (num_ports == 0))
 198                                 continue;
 199
 200                         for (l = 0;
 201                              l < port->num_def_qps + port->num_add_tx_qps;
 202                              l++) {
 203                                 struct ehea_port_res *pr = &port->port_res[l];
 204
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->qp->fw_handle;
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->send_cq->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->eq->fw_handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->send_mr.handle;
 215                                 arr[i].adh = adapter->handle;
 216                                 arr[i++].fwh = pr->recv_mr.handle;
 217                         }
 218                         arr[i].adh = adapter->handle;
 219                         arr[i++].fwh = port->qp_eq->fw_handle;
 220                         num_ports--;
 221                 }
 222
 223                 arr[i].adh = adapter->handle;
 224                 arr[i++].fwh = adapter->neq->fw_handle;
 225
 226                 if (adapter->mr.handle) {
 227                         arr[i].adh = adapter->handle;
 228                         arr[i++].fwh = adapter->mr.handle;
 229                 }
 230                 num_adapters--;
 231         }
 232
 233 out_update:
 234         kfree(ehea_fw_handles.arr);
 235         ehea_fw_handles.arr = arr;
 236         ehea_fw_handles.num_entries = i;
 237 out:
 238         mutex_unlock(&ehea_fw_handles.lock);
 239 }
 240
 241 static void ehea_update_bcmc_registrations(void)
 242 {
 243         unsigned long flags;
 244         struct ehea_bcmc_reg_entry *arr = NULL;
 245         struct ehea_adapter *adapter;
 246         struct ehea_mc_list *mc_entry;
 247         int num_registrations = 0;
 248         int i = 0;
 249         int k;
 250
 251         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 252
 253         /* Determine number of registrations */
 254         list_for_each_entry(adapter, &adapter_list, list)
 255                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 256                         struct ehea_port *port = adapter->port[k];
 257
 258                         if (!port || (port->state != EHEA_PORT_UP))
 259                                 continue;
 260
 261                         num_registrations += 2; /* Broadcast registrations */
 262
 263                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 264                                 num_registrations += 2;
 265                 }
 266
 267         if (num_registrations) {
 268                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 269                 if (!arr)
 270                         goto out;  /* Keep the existing array */
 271         } else
 272                 goto out_update;
 273
 274         list_for_each_entry(adapter, &adapter_list, list) {
 275                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 276                         struct ehea_port *port = adapter->port[k];
 277
 278                         if (!port || (port->state != EHEA_PORT_UP))
 279                                 continue;
 280
 281                         if (num_registrations == 0)
 282                                 goto out_update;
 283
 284                         arr[i].adh = adapter->handle;
 285                         arr[i].port_id = port->logical_port_id;
 286                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 287                                           EHEA_BCMC_UNTAGGED;
 288                         arr[i++].macaddr = port->mac_addr;
 289
 290                         arr[i].adh = adapter->handle;
 291                         arr[i].port_id = port->logical_port_id;
 292                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 293                                           EHEA_BCMC_VLANID_ALL;
 294                         arr[i++].macaddr = port->mac_addr;
 295                         num_registrations -= 2;
 296
 297                         list_for_each_entry(mc_entry,
 298                                             &port->mc_list->list, list) {
 299                                 if (num_registrations == 0)
 300                                         goto out_update;
 301
 302                                 arr[i].adh = adapter->handle;
 303                                 arr[i].port_id = port->logical_port_id;
 304                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 305                                                   EHEA_BCMC_MULTICAST |
 306                                                   EHEA_BCMC_UNTAGGED;
 307                                 arr[i++].macaddr = mc_entry->macaddr;
 308
 309                                 arr[i].adh = adapter->handle;
 310                                 arr[i].port_id = port->logical_port_id;
 311                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 312                                                   EHEA_BCMC_MULTICAST |
 313                                                   EHEA_BCMC_VLANID_ALL;
 314                                 arr[i++].macaddr = mc_entry->macaddr;
 315                                 num_registrations -= 2;
 316                         }
 317                 }
 318         }
 319
 320 out_update:
 321         kfree(ehea_bcmc_regs.arr);
 322         ehea_bcmc_regs.arr = arr;
 323         ehea_bcmc_regs.num_entries = i;
 324 out:
 325         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 326 }
 327
 328 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 329 {
 330         struct ehea_port *port = netdev_priv(dev);
 331         struct net_device_stats *stats = &port->stats;
 332         struct hcp_ehea_port_cb2 *cb2;
 333         u64 hret, rx_packets, tx_packets;
 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
 823
 824 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 825 {
 826         struct sk_buff *skb;
 827         struct ehea_cq *send_cq = pr->send_cq;
 828         struct ehea_cqe *cqe;
 829         int quota = my_quota;
 830         int cqe_counter = 0;
 831         int swqe_av = 0;
 832         int index;
 833         unsigned long flags;
 834
 835         cqe = ehea_poll_cq(send_cq);
 836         while (cqe && (quota > 0)) {
 837                 ehea_inc_cq(send_cq);
 838
 839                 cqe_counter++;
 840                 rmb();
 841
 842                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 843                         pr->sq_restart_flag = 1;
 844                         swqe_av++;
 845                         break;
 846                 }
 847
 848                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 849                         ehea_error("Bad send completion status=0x%04X",
 850                                    cqe->status);
 851
 852                         if (netif_msg_tx_err(pr->port))
 853                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 854
 855                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 856                                 ehea_error("Resetting port");
 857                                 ehea_schedule_port_reset(pr->port);
 858                                 break;
 859                         }
 860                 }
 861
 862                 if (netif_msg_tx_done(pr->port))
 863                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 864
 865                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 866                            == EHEA_SWQE2_TYPE)) {
 867
 868                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 869                         skb = pr->sq_skba.arr[index];
 870                         dev_kfree_skb(skb);
 871                         pr->sq_skba.arr[index] = NULL;
 872                 }
 873
 874                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 875                 quota--;
 876
 877                 cqe = ehea_poll_cq(send_cq);
 878         }
 879
 880         ehea_update_feca(send_cq, cqe_counter);
 881         atomic_add(swqe_av, &pr->swqe_avail);
 882
 883         spin_lock_irqsave(&pr->netif_queue, flags);
 884
 885         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 886                                   >= pr->swqe_refill_th)) {
 887                 netif_wake_queue(pr->port->netdev);
 888                 pr->queue_stopped = 0;
 889         }
 890         spin_unlock_irqrestore(&pr->netif_queue, flags);
 891
 892         return cqe;
 893 }
 894
 895 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 896 #define EHEA_POLL_MAX_CQES 65535
 897
 898 static int ehea_poll(struct napi_struct *napi, int budget)
 899 {
 900         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 901                                                 napi);
 902         struct net_device *dev = pr->port->netdev;
 903         struct ehea_cqe *cqe;
 904         struct ehea_cqe *cqe_skb = NULL;
 905         int force_irq, wqe_index;
 906         int rx = 0;
 907
 908         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 909         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 910
 911         if (!force_irq)
 912                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 913
 914         while ((rx != budget) || force_irq) {
 915                 pr->poll_counter = 0;
 916                 force_irq = 0;
 917                 napi_complete(napi);
 918                 ehea_reset_cq_ep(pr->recv_cq);
 919                 ehea_reset_cq_ep(pr->send_cq);
 920                 ehea_reset_cq_n1(pr->recv_cq);
 921                 ehea_reset_cq_n1(pr->send_cq);
 922                 rmb();
 923                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 924                 cqe_skb = ehea_poll_cq(pr->send_cq);
 925
 926                 if (!cqe && !cqe_skb)
 927                         return rx;
 928
 929                 if (!napi_reschedule(napi))
 930                         return rx;
 931
 932                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 933                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 934         }
 935
 936         pr->poll_counter++;
 937         return rx;
 938 }
 939
 940 #ifdef CONFIG_NET_POLL_CONTROLLER
 941 static void ehea_netpoll(struct net_device *dev)
 942 {
 943         struct ehea_port *port = netdev_priv(dev);
 944         int i;
 945
 946         for (i = 0; i < port->num_def_qps; i++)
 947                 napi_schedule(&port->port_res[i].napi);
 948 }
 949 #endif
 950
 951 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 952 {
 953         struct ehea_port_res *pr = param;
 954
 955         napi_schedule(&pr->napi);
 956
 957         return IRQ_HANDLED;
 958 }
 959
 960 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 961 {
 962         struct ehea_port *port = param;
 963         struct ehea_eqe *eqe;
 964         struct ehea_qp *qp;
 965         u32 qp_token;
 966         u64 resource_type, aer, aerr;
 967         int reset_port = 0;
 968
 969         eqe = ehea_poll_eq(port->qp_eq);
 970
 971         while (eqe) {
 972                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 973                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
 974                            eqe->entry, qp_token);
 975
 976                 qp = port->port_res[qp_token].qp;
 977
 978                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 979                                                 &aer, &aerr);
 980
 981                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 982                         if ((aer & EHEA_AER_RESET_MASK) ||
 983                             (aerr & EHEA_AERR_RESET_MASK))
 984                                  reset_port = 1;
 985                 } else
 986                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 987
 988                 eqe = ehea_poll_eq(port->qp_eq);
 989         }
 990
 991         if (reset_port) {
 992                 ehea_error("Resetting port");
 993                 ehea_schedule_port_reset(port);
 994         }
 995
 996         return IRQ_HANDLED;
 997 }
 998
 999 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1000                                        int logical_port)
1001 {
1002         int i;
1003
1004         for (i = 0; i < EHEA_MAX_PORTS; i++)
1005                 if (adapter->port[i])
1006                         if (adapter->port[i]->logical_port_id == logical_port)
1007                                 return adapter->port[i];
1008         return NULL;
1009 }
1010
1011 int ehea_sense_port_attr(struct ehea_port *port)
1012 {
1013         int ret;
1014         u64 hret;
1015         struct hcp_ehea_port_cb0 *cb0;
1016
1017         /* may be called via ehea_neq_tasklet() */
1018         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1019         if (!cb0) {
1020                 ehea_error("no mem for cb0");
1021                 ret = -ENOMEM;
1022                 goto out;
1023         }
1024
1025         hret = ehea_h_query_ehea_port(port->adapter->handle,
1026                                       port->logical_port_id, H_PORT_CB0,
1027                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1028                                       cb0);
1029         if (hret != H_SUCCESS) {
1030                 ret = -EIO;
1031                 goto out_free;
1032         }
1033
1034         /* MAC address */
1035         port->mac_addr = cb0->port_mac_addr << 16;
1036
1037         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1038                 ret = -EADDRNOTAVAIL;
1039                 goto out_free;
1040         }
1041
1042         /* Port speed */
1043         switch (cb0->port_speed) {
1044         case H_SPEED_10M_H:
1045                 port->port_speed = EHEA_SPEED_10M;
1046                 port->full_duplex = 0;
1047                 break;
1048         case H_SPEED_10M_F:
1049                 port->port_speed = EHEA_SPEED_10M;
1050                 port->full_duplex = 1;
1051                 break;
1052         case H_SPEED_100M_H:
1053                 port->port_speed = EHEA_SPEED_100M;
1054                 port->full_duplex = 0;
1055                 break;
1056         case H_SPEED_100M_F:
1057                 port->port_speed = EHEA_SPEED_100M;
1058                 port->full_duplex = 1;
1059                 break;
1060         case H_SPEED_1G_F:
1061                 port->port_speed = EHEA_SPEED_1G;
1062                 port->full_duplex = 1;
1063                 break;
1064         case H_SPEED_10G_F:
1065                 port->port_speed = EHEA_SPEED_10G;
1066                 port->full_duplex = 1;
1067                 break;
1068         default:
1069                 port->port_speed = 0;
1070                 port->full_duplex = 0;
1071                 break;
1072         }
1073
1074         port->autoneg = 1;
1075         port->num_mcs = cb0->num_default_qps;
1076
1077         /* Number of default QPs */
1078         if (use_mcs)
1079                 port->num_def_qps = cb0->num_default_qps;
1080         else
1081                 port->num_def_qps = 1;
1082
1083         if (!port->num_def_qps) {
1084                 ret = -EINVAL;
1085                 goto out_free;
1086         }
1087
1088         port->num_tx_qps = num_tx_qps;
1089
1090         if (port->num_def_qps >= port->num_tx_qps)
1091                 port->num_add_tx_qps = 0;
1092         else
1093                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1094
1095         ret = 0;
1096 out_free:
1097         if (ret || netif_msg_probe(port))
1098                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1099         free_page((unsigned long)cb0);
1100 out:
1101         return ret;
1102 }
1103
1104 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1105 {
1106         struct hcp_ehea_port_cb4 *cb4;
1107         u64 hret;
1108         int ret = 0;
1109
1110         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1111         if (!cb4) {
1112                 ehea_error("no mem for cb4");
1113                 ret = -ENOMEM;
1114                 goto out;
1115         }
1116
1117         cb4->port_speed = port_speed;
1118
1119         netif_carrier_off(port->netdev);
1120
1121         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1122                                        port->logical_port_id,
1123                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1124         if (hret == H_SUCCESS) {
1125                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1126
1127                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1128                                               port->logical_port_id,
1129                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1130                                               cb4);
1131                 if (hret == H_SUCCESS) {
1132                         switch (cb4->port_speed) {
1133                         case H_SPEED_10M_H:
1134                                 port->port_speed = EHEA_SPEED_10M;
1135                                 port->full_duplex = 0;
1136                                 break;
1137                         case H_SPEED_10M_F:
1138                                 port->port_speed = EHEA_SPEED_10M;
1139                                 port->full_duplex = 1;
1140                                 break;
1141                         case H_SPEED_100M_H:
1142                                 port->port_speed = EHEA_SPEED_100M;
1143                                 port->full_duplex = 0;
1144                                 break;
1145                         case H_SPEED_100M_F:
1146                                 port->port_speed = EHEA_SPEED_100M;
1147                                 port->full_duplex = 1;
1148                                 break;
1149                         case H_SPEED_1G_F:
1150                                 port->port_speed = EHEA_SPEED_1G;
1151                                 port->full_duplex = 1;
1152                                 break;
1153                         case H_SPEED_10G_F:
1154                                 port->port_speed = EHEA_SPEED_10G;
1155                                 port->full_duplex = 1;
1156                                 break;
1157                         default:
1158                                 port->port_speed = 0;
1159                                 port->full_duplex = 0;
1160                                 break;
1161                         }
1162                 } else {
1163                         ehea_error("Failed sensing port speed");
1164                         ret = -EIO;
1165                 }
1166         } else {
1167                 if (hret == H_AUTHORITY) {
1168                         ehea_info("Hypervisor denied setting port speed");
1169                         ret = -EPERM;
1170                 } else {
1171                         ret = -EIO;
1172                         ehea_error("Failed setting port speed");
1173                 }
1174         }
1175         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1176                 netif_carrier_on(port->netdev);
1177
1178         free_page((unsigned long)cb4);
1179 out:
1180         return ret;
1181 }
1182
1183 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1184 {
1185         int ret;
1186         u8 ec;
1187         u8 portnum;
1188         struct ehea_port *port;
1189
1190         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1191         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1192         port = ehea_get_port(adapter, portnum);
1193
1194         switch (ec) {
1195         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1196
1197                 if (!port) {
1198                         ehea_error("unknown portnum %x", portnum);
1199                         break;
1200                 }
1201
1202                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1203                         if (!netif_carrier_ok(port->netdev)) {
1204                                 ret = ehea_sense_port_attr(port);
1205                                 if (ret) {
1206                                         ehea_error("failed resensing port "
1207                                                    "attributes");
1208                                         break;
1209                                 }
1210
1211                                 if (netif_msg_link(port))
1212                                         ehea_info("%s: Logical port up: %dMbps "
1213                                                   "%s Duplex",
1214                                                   port->netdev->name,
1215                                                   port->port_speed,
1216                                                   port->full_duplex ==
1217                                                   1 ? "Full" : "Half");
1218
1219                                 netif_carrier_on(port->netdev);
1220                                 netif_wake_queue(port->netdev);
1221                         }
1222                 } else
1223                         if (netif_carrier_ok(port->netdev)) {
1224                                 if (netif_msg_link(port))
1225                                         ehea_info("%s: Logical port down",
1226                                                   port->netdev->name);
1227                                 netif_carrier_off(port->netdev);
1228                                 netif_stop_queue(port->netdev);
1229                         }
1230
1231                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1232                         port->phy_link = EHEA_PHY_LINK_UP;
1233                         if (netif_msg_link(port))
1234                                 ehea_info("%s: Physical port up",
1235                                           port->netdev->name);
1236                         if (prop_carrier_state)
1237                                 netif_carrier_on(port->netdev);
1238                 } else {
1239                         port->phy_link = EHEA_PHY_LINK_DOWN;
1240                         if (netif_msg_link(port))
1241                                 ehea_info("%s: Physical port down",
1242                                           port->netdev->name);
1243                         if (prop_carrier_state)
1244                                 netif_carrier_off(port->netdev);
1245                 }
1246
1247                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1248                         ehea_info("External switch port is primary port");
1249                 else
1250                         ehea_info("External switch port is backup port");
1251
1252                 break;
1253         case EHEA_EC_ADAPTER_MALFUNC:
1254                 ehea_error("Adapter malfunction");
1255                 break;
1256         case EHEA_EC_PORT_MALFUNC:
1257                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1258                 netif_carrier_off(port->netdev);
1259                 netif_stop_queue(port->netdev);
1260                 break;
1261         default:
1262                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1263                 break;
1264         }
1265 }
1266
1267 static void ehea_neq_tasklet(unsigned long data)
1268 {
1269         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1270         struct ehea_eqe *eqe;
1271         u64 event_mask;
1272
1273         eqe = ehea_poll_eq(adapter->neq);
1274         ehea_debug("eqe=%p", eqe);
1275
1276         while (eqe) {
1277                 ehea_debug("*eqe=%lx", eqe->entry);
1278                 ehea_parse_eqe(adapter, eqe->entry);
1279                 eqe = ehea_poll_eq(adapter->neq);
1280                 ehea_debug("next eqe=%p", eqe);
1281         }
1282
1283         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1284                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1285                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1286
1287         ehea_h_reset_events(adapter->handle,
1288                             adapter->neq->fw_handle, event_mask);
1289 }
1290
1291 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1292 {
1293         struct ehea_adapter *adapter = param;
1294         tasklet_hi_schedule(&adapter->neq_tasklet);
1295         return IRQ_HANDLED;
1296 }
1297
1298
1299 static int ehea_fill_port_res(struct ehea_port_res *pr)
1300 {
1301         int ret;
1302         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1303
1304         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1305                                - init_attr->act_nr_rwqes_rq2
1306                                - init_attr->act_nr_rwqes_rq3 - 1);
1307
1308         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1309
1310         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1311
1312         return ret;
1313 }
1314
1315 static int ehea_reg_interrupts(struct net_device *dev)
1316 {
1317         struct ehea_port *port = netdev_priv(dev);
1318         struct ehea_port_res *pr;
1319         int i, ret;
1320
1321
1322         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1323                  dev->name);
1324
1325         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1326                                   ehea_qp_aff_irq_handler,
1327                                   IRQF_DISABLED, port->int_aff_name, port);
1328         if (ret) {
1329                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1330                            "ist=%X", port->qp_eq->attr.ist1);
1331                 goto out_free_qpeq;
1332         }
1333
1334         if (netif_msg_ifup(port))
1335                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1336                           "registered", port->qp_eq->attr.ist1);
1337
1338
1339         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1340                 pr = &port->port_res[i];
1341                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1342                          "%s-queue%d", dev->name, i);
1343                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1344                                           ehea_recv_irq_handler,
1345                                           IRQF_DISABLED, pr->int_send_name,
1346                                           pr);
1347                 if (ret) {
1348                         ehea_error("failed registering irq for ehea_queue "
1349                                    "port_res_nr:%d, ist=%X", i,
1350                                    pr->eq->attr.ist1);
1351                         goto out_free_req;
1352                 }
1353                 if (netif_msg_ifup(port))
1354                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1355                                   "%d registered", pr->eq->attr.ist1, i);
1356         }
1357 out:
1358         return ret;
1359
1360
1361 out_free_req:
1362         while (--i >= 0) {
1363                 u32 ist = port->port_res[i].eq->attr.ist1;
1364                 ibmebus_free_irq(ist, &port->port_res[i]);
1365         }
1366
1367 out_free_qpeq:
1368         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1369         i = port->num_def_qps;
1370
1371         goto out;
1372
1373 }
1374
1375 static void ehea_free_interrupts(struct net_device *dev)
1376 {
1377         struct ehea_port *port = netdev_priv(dev);
1378         struct ehea_port_res *pr;
1379         int i;
1380
1381         /* send */
1382
1383         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1384                 pr = &port->port_res[i];
1385                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1386                 if (netif_msg_intr(port))
1387                         ehea_info("free send irq for res %d with handle 0x%X",
1388                                   i, pr->eq->attr.ist1);
1389         }
1390
1391         /* associated events */
1392         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1393         if (netif_msg_intr(port))
1394                 ehea_info("associated event interrupt for handle 0x%X freed",
1395                           port->qp_eq->attr.ist1);
1396 }
1397
1398 static int ehea_configure_port(struct ehea_port *port)
1399 {
1400         int ret, i;
1401         u64 hret, mask;
1402         struct hcp_ehea_port_cb0 *cb0;
1403
1404         ret = -ENOMEM;
1405         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1406         if (!cb0)
1407                 goto out;
1408
1409         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1410                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1411                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1412                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1413                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1414                                       PXLY_RC_VLAN_FILTER)
1415                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1416
1417         for (i = 0; i < port->num_mcs; i++)
1418                 if (use_mcs)
1419                         cb0->default_qpn_arr[i] =
1420                                 port->port_res[i].qp->init_attr.qp_nr;
1421                 else
1422                         cb0->default_qpn_arr[i] =
1423                                 port->port_res[0].qp->init_attr.qp_nr;
1424
1425         if (netif_msg_ifup(port))
1426                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1427
1428         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1429              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1430
1431         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1432                                        port->logical_port_id,
1433                                        H_PORT_CB0, mask, cb0);
1434         ret = -EIO;
1435         if (hret != H_SUCCESS)
1436                 goto out_free;
1437
1438         ret = 0;
1439
1440 out_free:
1441         free_page((unsigned long)cb0);
1442 out:
1443         return ret;
1444 }
1445
1446 int ehea_gen_smrs(struct ehea_port_res *pr)
1447 {
1448         int ret;
1449         struct ehea_adapter *adapter = pr->port->adapter;
1450
1451         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1452         if (ret)
1453                 goto out;
1454
1455         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1456         if (ret)
1457                 goto out_free;
1458
1459         return 0;
1460
1461 out_free:
1462         ehea_rem_mr(&pr->send_mr);
1463 out:
1464         ehea_error("Generating SMRS failed\n");
1465         return -EIO;
1466 }
1467
1468 int ehea_rem_smrs(struct ehea_port_res *pr)
1469 {
1470         if ((ehea_rem_mr(&pr->send_mr)) ||
1471             (ehea_rem_mr(&pr->recv_mr)))
1472                 return -EIO;
1473         else
1474                 return 0;
1475 }
1476
1477 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1478 {
1479         int arr_size = sizeof(void *) * max_q_entries;
1480
1481         q_skba->arr = vmalloc(arr_size);
1482         if (!q_skba->arr)
1483                 return -ENOMEM;
1484
1485         memset(q_skba->arr, 0, arr_size);
1486
1487         q_skba->len = max_q_entries;
1488         q_skba->index = 0;
1489         q_skba->os_skbs = 0;
1490
1491         return 0;
1492 }
1493
1494 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1495                               struct port_res_cfg *pr_cfg, int queue_token)
1496 {
1497         struct ehea_adapter *adapter = port->adapter;
1498         enum ehea_eq_type eq_type = EHEA_EQ;
1499         struct ehea_qp_init_attr *init_attr = NULL;
1500         int ret = -EIO;
1501
1502         memset(pr, 0, sizeof(struct ehea_port_res));
1503
1504         pr->port = port;
1505         spin_lock_init(&pr->xmit_lock);
1506         spin_lock_init(&pr->netif_queue);
1507
1508         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1509         if (!pr->eq) {
1510                 ehea_error("create_eq failed (eq)");
1511                 goto out_free;
1512         }
1513
1514         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1515                                      pr->eq->fw_handle,
1516                                      port->logical_port_id);
1517         if (!pr->recv_cq) {
1518                 ehea_error("create_cq failed (cq_recv)");
1519                 goto out_free;
1520         }
1521
1522         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1523                                      pr->eq->fw_handle,
1524                                      port->logical_port_id);
1525         if (!pr->send_cq) {
1526                 ehea_error("create_cq failed (cq_send)");
1527                 goto out_free;
1528         }
1529
1530         if (netif_msg_ifup(port))
1531                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1532                           pr->send_cq->attr.act_nr_of_cqes,
1533                           pr->recv_cq->attr.act_nr_of_cqes);
1534
1535         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1536         if (!init_attr) {
1537                 ret = -ENOMEM;
1538                 ehea_error("no mem for ehea_qp_init_attr");
1539                 goto out_free;
1540         }
1541
1542         init_attr->low_lat_rq1 = 1;
1543         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1544         init_attr->rq_count = 3;
1545         init_attr->qp_token = queue_token;
1546         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1547         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1548         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1549         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1550         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1551         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1552         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1553         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1554         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1555         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1556         init_attr->port_nr = port->logical_port_id;
1557         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1558         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1559         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1560
1561         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1562         if (!pr->qp) {
1563                 ehea_error("create_qp failed");
1564                 ret = -EIO;
1565                 goto out_free;
1566         }
1567
1568         if (netif_msg_ifup(port))
1569                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1570                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1571                           init_attr->act_nr_send_wqes,
1572                           init_attr->act_nr_rwqes_rq1,
1573                           init_attr->act_nr_rwqes_rq2,
1574                           init_attr->act_nr_rwqes_rq3);
1575
1576         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1577
1578         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1579         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1580         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1581         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1582         if (ret)
1583                 goto out_free;
1584
1585         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1586         if (ehea_gen_smrs(pr) != 0) {
1587                 ret = -EIO;
1588                 goto out_free;
1589         }
1590
1591         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1592
1593         kfree(init_attr);
1594
1595         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1596
1597         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1598         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1599         pr->lro_mgr.lro_arr = pr->lro_desc;
1600         pr->lro_mgr.get_skb_header = get_skb_hdr;
1601         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1602         pr->lro_mgr.dev = port->netdev;
1603         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1604         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1605
1606         ret = 0;
1607         goto out;
1608
1609 out_free:
1610         kfree(init_attr);
1611         vfree(pr->sq_skba.arr);
1612         vfree(pr->rq1_skba.arr);
1613         vfree(pr->rq2_skba.arr);
1614         vfree(pr->rq3_skba.arr);
1615         ehea_destroy_qp(pr->qp);
1616         ehea_destroy_cq(pr->send_cq);
1617         ehea_destroy_cq(pr->recv_cq);
1618         ehea_destroy_eq(pr->eq);
1619 out:
1620         return ret;
1621 }
1622
1623 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1624 {
1625         int ret, i;
1626
1627         if (pr->qp)
1628                 netif_napi_del(&pr->napi);
1629
1630         ret = ehea_destroy_qp(pr->qp);
1631
1632         if (!ret) {
1633                 ehea_destroy_cq(pr->send_cq);
1634                 ehea_destroy_cq(pr->recv_cq);
1635                 ehea_destroy_eq(pr->eq);
1636
1637                 for (i = 0; i < pr->rq1_skba.len; i++)
1638                         if (pr->rq1_skba.arr[i])
1639                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1640
1641                 for (i = 0; i < pr->rq2_skba.len; i++)
1642                         if (pr->rq2_skba.arr[i])
1643                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1644
1645                 for (i = 0; i < pr->rq3_skba.len; i++)
1646                         if (pr->rq3_skba.arr[i])
1647                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1648
1649                 for (i = 0; i < pr->sq_skba.len; i++)
1650                         if (pr->sq_skba.arr[i])
1651                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1652
1653                 vfree(pr->rq1_skba.arr);
1654                 vfree(pr->rq2_skba.arr);
1655                 vfree(pr->rq3_skba.arr);
1656                 vfree(pr->sq_skba.arr);
1657                 ret = ehea_rem_smrs(pr);
1658         }
1659         return ret;
1660 }
1661
1662 /*
1663  * The write_* functions store information in swqe which is used by
1664  * the hardware to calculate the ip/tcp/udp checksum
1665  */
1666
1667 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1668                                       const struct sk_buff *skb)
1669 {
1670         swqe->ip_start = skb_network_offset(skb);
1671         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1672 }
1673
1674 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1675                                         const struct sk_buff *skb)
1676 {
1677         swqe->tcp_offset =
1678                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1679
1680         swqe->tcp_end = (u16)skb->len - 1;
1681 }
1682
1683 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1684                                         const struct sk_buff *skb)
1685 {
1686         swqe->tcp_offset =
1687                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1688
1689         swqe->tcp_end = (u16)skb->len - 1;
1690 }
1691
1692
1693 static void write_swqe2_TSO(struct sk_buff *skb,
1694                             struct ehea_swqe *swqe, u32 lkey)
1695 {
1696         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1697         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1698         int skb_data_size = skb_headlen(skb);
1699         int headersize;
1700
1701         /* Packet is TCP with TSO enabled */
1702         swqe->tx_control |= EHEA_SWQE_TSO;
1703         swqe->mss = skb_shinfo(skb)->gso_size;
1704         /* copy only eth/ip/tcp headers to immediate data and
1705          * the rest of skb->data to sg1entry
1706          */
1707         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1708
1709         skb_data_size = skb_headlen(skb);
1710
1711         if (skb_data_size >= headersize) {
1712                 /* copy immediate data */
1713                 skb_copy_from_linear_data(skb, imm_data, headersize);
1714                 swqe->immediate_data_length = headersize;
1715
1716                 if (skb_data_size > headersize) {
1717                         /* set sg1entry data */
1718                         sg1entry->l_key = lkey;
1719                         sg1entry->len = skb_data_size - headersize;
1720                         sg1entry->vaddr =
1721                                 ehea_map_vaddr(skb->data + headersize);
1722                         swqe->descriptors++;
1723                 }
1724         } else
1725                 ehea_error("cannot handle fragmented headers");
1726 }
1727
1728 static void write_swqe2_nonTSO(struct sk_buff *skb,
1729                                struct ehea_swqe *swqe, u32 lkey)
1730 {
1731         int skb_data_size = skb_headlen(skb);
1732         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1733         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1734
1735         /* Packet is any nonTSO type
1736          *
1737          * Copy as much as possible skb->data to immediate data and
1738          * the rest to sg1entry
1739          */
1740         if (skb_data_size >= SWQE2_MAX_IMM) {
1741                 /* copy immediate data */
1742                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1743
1744                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1745
1746                 if (skb_data_size > SWQE2_MAX_IMM) {
1747                         /* copy sg1entry data */
1748                         sg1entry->l_key = lkey;
1749                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1750                         sg1entry->vaddr =
1751                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1752                         swqe->descriptors++;
1753                 }
1754         } else {
1755                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1756                 swqe->immediate_data_length = skb_data_size;
1757         }
1758 }
1759
1760 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1761                                     struct ehea_swqe *swqe, u32 lkey)
1762 {
1763         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1764         skb_frag_t *frag;
1765         int nfrags, sg1entry_contains_frag_data, i;
1766
1767         nfrags = skb_shinfo(skb)->nr_frags;
1768         sg1entry = &swqe->u.immdata_desc.sg_entry;
1769         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1770         swqe->descriptors = 0;
1771         sg1entry_contains_frag_data = 0;
1772
1773         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1774                 write_swqe2_TSO(skb, swqe, lkey);
1775         else
1776                 write_swqe2_nonTSO(skb, swqe, lkey);
1777
1778         /* write descriptors */
1779         if (nfrags > 0) {
1780                 if (swqe->descriptors == 0) {
1781                         /* sg1entry not yet used */
1782                         frag = &skb_shinfo(skb)->frags[0];
1783
1784                         /* copy sg1entry data */
1785                         sg1entry->l_key = lkey;
1786                         sg1entry->len = frag->size;
1787                         sg1entry->vaddr =
1788                                 ehea_map_vaddr(page_address(frag->page)
1789                                                + frag->page_offset);
1790                         swqe->descriptors++;
1791                         sg1entry_contains_frag_data = 1;
1792                 }
1793
1794                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1795
1796                         frag = &skb_shinfo(skb)->frags[i];
1797                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1798
1799                         sgentry->l_key = lkey;
1800                         sgentry->len = frag->size;
1801                         sgentry->vaddr =
1802                                 ehea_map_vaddr(page_address(frag->page)
1803                                                + frag->page_offset);
1804                         swqe->descriptors++;
1805                 }
1806         }
1807 }
1808
1809 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1810 {
1811         int ret = 0;
1812         u64 hret;
1813         u8 reg_type;
1814
1815         /* De/Register untagged packets */
1816         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1817         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1818                                      port->logical_port_id,
1819                                      reg_type, port->mac_addr, 0, hcallid);
1820         if (hret != H_SUCCESS) {
1821                 ehea_error("%sregistering bc address failed (tagged)",
1822                            hcallid == H_REG_BCMC ? "" : "de");
1823                 ret = -EIO;
1824                 goto out_herr;
1825         }
1826
1827         /* De/Register VLAN packets */
1828         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1829         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1830                                      port->logical_port_id,
1831                                      reg_type, port->mac_addr, 0, hcallid);
1832         if (hret != H_SUCCESS) {
1833                 ehea_error("%sregistering bc address failed (vlan)",
1834                            hcallid == H_REG_BCMC ? "" : "de");
1835                 ret = -EIO;
1836         }
1837 out_herr:
1838         return ret;
1839 }
1840
1841 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1842 {
1843         struct ehea_port *port = netdev_priv(dev);
1844         struct sockaddr *mac_addr = sa;
1845         struct hcp_ehea_port_cb0 *cb0;
1846         int ret;
1847         u64 hret;
1848
1849         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1850                 ret = -EADDRNOTAVAIL;
1851                 goto out;
1852         }
1853
1854         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1855         if (!cb0) {
1856                 ehea_error("no mem for cb0");
1857                 ret = -ENOMEM;
1858                 goto out;
1859         }
1860
1861         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1862
1863         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1864
1865         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1866                                        port->logical_port_id, H_PORT_CB0,
1867                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1868         if (hret != H_SUCCESS) {
1869                 ret = -EIO;
1870                 goto out_free;
1871         }
1872
1873         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1874
1875         /* Deregister old MAC in pHYP */
1876         if (port->state == EHEA_PORT_UP) {
1877                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1878                 if (ret)
1879                         goto out_upregs;
1880         }
1881
1882         port->mac_addr = cb0->port_mac_addr << 16;
1883
1884         /* Register new MAC in pHYP */
1885         if (port->state == EHEA_PORT_UP) {
1886                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1887                 if (ret)
1888                         goto out_upregs;
1889         }
1890
1891         ret = 0;
1892
1893 out_upregs:
1894         ehea_update_bcmc_registrations();
1895 out_free:
1896         free_page((unsigned long)cb0);
1897 out:
1898         return ret;
1899 }
1900
1901 static void ehea_promiscuous_error(u64 hret, int enable)
1902 {
1903         if (hret == H_AUTHORITY)
1904                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1905                           enable == 1 ? "en" : "dis");
1906         else
1907                 ehea_error("failed %sabling promiscuous mode",
1908                            enable == 1 ? "en" : "dis");
1909 }
1910
1911 static void ehea_promiscuous(struct net_device *dev, int enable)
1912 {
1913         struct ehea_port *port = netdev_priv(dev);
1914         struct hcp_ehea_port_cb7 *cb7;
1915         u64 hret;
1916
1917         if ((enable && port->promisc) || (!enable && !port->promisc))
1918                 return;
1919
1920         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1921         if (!cb7) {
1922                 ehea_error("no mem for cb7");
1923                 goto out;
1924         }
1925
1926         /* Modify Pxs_DUCQPN in CB7 */
1927         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1928
1929         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1930                                        port->logical_port_id,
1931                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1932         if (hret) {
1933                 ehea_promiscuous_error(hret, enable);
1934                 goto out;
1935         }
1936
1937         port->promisc = enable;
1938 out:
1939         free_page((unsigned long)cb7);
1940 }
1941
1942 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1943                                      u32 hcallid)
1944 {
1945         u64 hret;
1946         u8 reg_type;
1947
1948         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1949                  | EHEA_BCMC_UNTAGGED;
1950
1951         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1952                                      port->logical_port_id,
1953                                      reg_type, mc_mac_addr, 0, hcallid);
1954         if (hret)
1955                 goto out;
1956
1957         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1958                  | EHEA_BCMC_VLANID_ALL;
1959
1960         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1961                                      port->logical_port_id,
1962                                      reg_type, mc_mac_addr, 0, hcallid);
1963 out:
1964         return hret;
1965 }
1966
1967 static int ehea_drop_multicast_list(struct net_device *dev)
1968 {
1969         struct ehea_port *port = netdev_priv(dev);
1970         struct ehea_mc_list *mc_entry = port->mc_list;
1971         struct list_head *pos;
1972         struct list_head *temp;
1973         int ret = 0;
1974         u64 hret;
1975
1976         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1977                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1978
1979                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1980                                                  H_DEREG_BCMC);
1981                 if (hret) {
1982                         ehea_error("failed deregistering mcast MAC");
1983                         ret = -EIO;
1984                 }
1985
1986                 list_del(pos);
1987                 kfree(mc_entry);
1988         }
1989         return ret;
1990 }
1991
1992 static void ehea_allmulti(struct net_device *dev, int enable)
1993 {
1994         struct ehea_port *port = netdev_priv(dev);
1995         u64 hret;
1996
1997         if (!port->allmulti) {
1998                 if (enable) {
1999                         /* Enable ALLMULTI */
2000                         ehea_drop_multicast_list(dev);
2001                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2002                         if (!hret)
2003                                 port->allmulti = 1;
2004                         else
2005                                 ehea_error("failed enabling IFF_ALLMULTI");
2006                 }
2007         } else
2008                 if (!enable) {
2009                         /* Disable ALLMULTI */
2010                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2011                         if (!hret)
2012                                 port->allmulti = 0;
2013                         else
2014                                 ehea_error("failed disabling IFF_ALLMULTI");
2015                 }
2016 }
2017
2018 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2019 {
2020         struct ehea_mc_list *ehea_mcl_entry;
2021         u64 hret;
2022
2023         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2024         if (!ehea_mcl_entry) {
2025                 ehea_error("no mem for mcl_entry");
2026                 return;
2027         }
2028
2029         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2030
2031         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2032
2033         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2034                                          H_REG_BCMC);
2035         if (!hret)
2036                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2037         else {
2038                 ehea_error("failed registering mcast MAC");
2039                 kfree(ehea_mcl_entry);
2040         }
2041 }
2042
2043 static void ehea_set_multicast_list(struct net_device *dev)
2044 {
2045         struct ehea_port *port = netdev_priv(dev);
2046         struct netdev_hw_addr *ha;
2047         int ret;
2048
2049         if (dev->flags & IFF_PROMISC) {
2050                 ehea_promiscuous(dev, 1);
2051                 return;
2052         }
2053         ehea_promiscuous(dev, 0);
2054
2055         if (dev->flags & IFF_ALLMULTI) {
2056                 ehea_allmulti(dev, 1);
2057                 goto out;
2058         }
2059         ehea_allmulti(dev, 0);
2060
2061         if (!netdev_mc_empty(dev)) {
2062                 ret = ehea_drop_multicast_list(dev);
2063                 if (ret) {
2064                         /* Dropping the current multicast list failed.
2065                          * Enabling ALL_MULTI is the best we can do.
2066                          */
2067                         ehea_allmulti(dev, 1);
2068                 }
2069
2070                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2071                         ehea_info("Mcast registration limit reached (0x%llx). "
2072                                   "Use ALLMULTI!",
2073                                   port->adapter->max_mc_mac);
2074                         goto out;
2075                 }
2076
2077                 netdev_for_each_mc_addr(ha, dev)
2078                         ehea_add_multicast_entry(port, ha->addr);
2079
2080         }
2081 out:
2082         ehea_update_bcmc_registrations();
2083 }
2084
2085 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2086 {
2087         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2088                 return -EINVAL;
2089         dev->mtu = new_mtu;
2090         return 0;
2091 }
2092
2093 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2094                        struct ehea_swqe *swqe, u32 lkey)
2095 {
2096         if (skb->protocol == htons(ETH_P_IP)) {
2097                 const struct iphdr *iph = ip_hdr(skb);
2098
2099                 /* IPv4 */
2100                 swqe->tx_control |= EHEA_SWQE_CRC
2101                                  | EHEA_SWQE_IP_CHECKSUM
2102                                  | EHEA_SWQE_TCP_CHECKSUM
2103                                  | EHEA_SWQE_IMM_DATA_PRESENT
2104                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2105
2106                 write_ip_start_end(swqe, skb);
2107
2108                 if (iph->protocol == IPPROTO_UDP) {
2109                         if ((iph->frag_off & IP_MF) ||
2110                             (iph->frag_off & IP_OFFSET))
2111                                 /* IP fragment, so don't change cs */
2112                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2113                         else
2114                                 write_udp_offset_end(swqe, skb);
2115                 } else if (iph->protocol == IPPROTO_TCP) {
2116                         write_tcp_offset_end(swqe, skb);
2117                 }
2118
2119                 /* icmp (big data) and ip segmentation packets (all other ip
2120                    packets) do not require any special handling */
2121
2122         } else {
2123                 /* Other Ethernet Protocol */
2124                 swqe->tx_control |= EHEA_SWQE_CRC
2125                                  | EHEA_SWQE_IMM_DATA_PRESENT
2126                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2127         }
2128
2129         write_swqe2_data(skb, dev, swqe, lkey);
2130 }
2131
2132 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2133                        struct ehea_swqe *swqe)
2134 {
2135         int nfrags = skb_shinfo(skb)->nr_frags;
2136         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2137         skb_frag_t *frag;
2138         int i;
2139
2140         if (skb->protocol == htons(ETH_P_IP)) {
2141                 const struct iphdr *iph = ip_hdr(skb);
2142
2143                 /* IPv4 */
2144                 write_ip_start_end(swqe, skb);
2145
2146                 if (iph->protocol == IPPROTO_TCP) {
2147                         swqe->tx_control |= EHEA_SWQE_CRC
2148                                          | EHEA_SWQE_IP_CHECKSUM
2149                                          | EHEA_SWQE_TCP_CHECKSUM
2150                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2151
2152                         write_tcp_offset_end(swqe, skb);
2153
2154                 } else if (iph->protocol == IPPROTO_UDP) {
2155                         if ((iph->frag_off & IP_MF) ||
2156                             (iph->frag_off & IP_OFFSET))
2157                                 /* IP fragment, so don't change cs */
2158                                 swqe->tx_control |= EHEA_SWQE_CRC
2159                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2160                         else {
2161                                 swqe->tx_control |= EHEA_SWQE_CRC
2162                                                  | EHEA_SWQE_IP_CHECKSUM
2163                                                  | EHEA_SWQE_TCP_CHECKSUM
2164                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2165
2166                                 write_udp_offset_end(swqe, skb);
2167                         }
2168                 } else {
2169                         /* icmp (big data) and
2170                            ip segmentation packets (all other ip packets) */
2171                         swqe->tx_control |= EHEA_SWQE_CRC
2172                                          | EHEA_SWQE_IP_CHECKSUM
2173                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2174                 }
2175         } else {
2176                 /* Other Ethernet Protocol */
2177                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2178         }
2179         /* copy (immediate) data */
2180         if (nfrags == 0) {
2181                 /* data is in a single piece */
2182                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2183         } else {
2184                 /* first copy data from the skb->data buffer ... */
2185                 skb_copy_from_linear_data(skb, imm_data,
2186                                           skb_headlen(skb));
2187                 imm_data += skb_headlen(skb);
2188
2189                 /* ... then copy data from the fragments */
2190                 for (i = 0; i < nfrags; i++) {
2191                         frag = &skb_shinfo(skb)->frags[i];
2192                         memcpy(imm_data,
2193                                page_address(frag->page) + frag->page_offset,
2194                                frag->size);
2195                         imm_data += frag->size;
2196                 }
2197         }
2198         swqe->immediate_data_length = skb->len;
2199         dev_kfree_skb(skb);
2200 }
2201
2202 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2203 {
2204         struct tcphdr *tcp;
2205         u32 tmp;
2206
2207         if ((skb->protocol == htons(ETH_P_IP)) &&
2208             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2209                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2210                                         (ip_hdr(skb)->ihl * 4));
2211                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2212                 tmp += ip_hdr(skb)->daddr % 31;
2213                 return tmp % num_qps;
2214         } else
2215                 return 0;
2216 }
2217
2218 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2219 {
2220         struct ehea_port *port = netdev_priv(dev);
2221         struct ehea_swqe *swqe;
2222         unsigned long flags;
2223         u32 lkey;
2224         int swqe_index;
2225         struct ehea_port_res *pr;
2226
2227         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2228
2229         if (!spin_trylock(&pr->xmit_lock))
2230                 return NETDEV_TX_BUSY;
2231
2232         if (pr->queue_stopped) {
2233                 spin_unlock(&pr->xmit_lock);
2234                 return NETDEV_TX_BUSY;
2235         }
2236
2237         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2238         memset(swqe, 0, SWQE_HEADER_SIZE);
2239         atomic_dec(&pr->swqe_avail);
2240
2241         if (skb->len <= SWQE3_MAX_IMM) {
2242                 u32 sig_iv = port->sig_comp_iv;
2243                 u32 swqe_num = pr->swqe_id_counter;
2244                 ehea_xmit3(skb, dev, swqe);
2245                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2246                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2247                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2248                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2249                                                       sig_iv);
2250                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2251                         pr->swqe_ll_count = 0;
2252                 } else
2253                         pr->swqe_ll_count += 1;
2254         } else {
2255                 swqe->wr_id =
2256                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2257                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2258                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2259                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2260                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2261
2262                 pr->sq_skba.index++;
2263                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2264
2265                 lkey = pr->send_mr.lkey;
2266                 ehea_xmit2(skb, dev, swqe, lkey);
2267                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2268         }
2269         pr->swqe_id_counter += 1;
2270
2271         if (port->vgrp && vlan_tx_tag_present(skb)) {
2272                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2273                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2274         }
2275
2276         if (netif_msg_tx_queued(port)) {
2277                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2278                 ehea_dump(swqe, 512, "swqe");
2279         }
2280
2281         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2282                 netif_stop_queue(dev);
2283                 swqe->tx_control |= EHEA_SWQE_PURGE;
2284         }
2285
2286         ehea_post_swqe(pr->qp, swqe);
2287         pr->tx_packets++;
2288
2289         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2290                 spin_lock_irqsave(&pr->netif_queue, flags);
2291                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2292                         pr->p_stats.queue_stopped++;
2293                         netif_stop_queue(dev);
2294                         pr->queue_stopped = 1;
2295                 }
2296                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2297         }
2298         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2299         spin_unlock(&pr->xmit_lock);
2300
2301         return NETDEV_TX_OK;
2302 }
2303
2304 static void ehea_vlan_rx_register(struct net_device *dev,
2305                                   struct vlan_group *grp)
2306 {
2307         struct ehea_port *port = netdev_priv(dev);
2308         struct ehea_adapter *adapter = port->adapter;
2309         struct hcp_ehea_port_cb1 *cb1;
2310         u64 hret;
2311
2312         port->vgrp = grp;
2313
2314         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2315         if (!cb1) {
2316                 ehea_error("no mem for cb1");
2317                 goto out;
2318         }
2319
2320         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2321                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2322         if (hret != H_SUCCESS)
2323                 ehea_error("modify_ehea_port failed");
2324
2325         free_page((unsigned long)cb1);
2326 out:
2327         return;
2328 }
2329
2330 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2331 {
2332         struct ehea_port *port = netdev_priv(dev);
2333         struct ehea_adapter *adapter = port->adapter;
2334         struct hcp_ehea_port_cb1 *cb1;
2335         int index;
2336         u64 hret;
2337
2338         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2339         if (!cb1) {
2340                 ehea_error("no mem for cb1");
2341                 goto out;
2342         }
2343
2344         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2345                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2346         if (hret != H_SUCCESS) {
2347                 ehea_error("query_ehea_port failed");
2348                 goto out;
2349         }
2350
2351         index = (vid / 64);
2352         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2353
2354         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2355                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2356         if (hret != H_SUCCESS)
2357                 ehea_error("modify_ehea_port failed");
2358 out:
2359         free_page((unsigned long)cb1);
2360         return;
2361 }
2362
2363 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2364 {
2365         struct ehea_port *port = netdev_priv(dev);
2366         struct ehea_adapter *adapter = port->adapter;
2367         struct hcp_ehea_port_cb1 *cb1;
2368         int index;
2369         u64 hret;
2370
2371         vlan_group_set_device(port->vgrp, vid, NULL);
2372
2373         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2374         if (!cb1) {
2375                 ehea_error("no mem for cb1");
2376                 goto out;
2377         }
2378
2379         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2380                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2381         if (hret != H_SUCCESS) {
2382                 ehea_error("query_ehea_port failed");
2383                 goto out;
2384         }
2385
2386         index = (vid / 64);
2387         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2388
2389         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2390                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2391         if (hret != H_SUCCESS)
2392                 ehea_error("modify_ehea_port failed");
2393 out:
2394         free_page((unsigned long)cb1);
2395 }
2396
2397 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2398 {
2399         int ret = -EIO;
2400         u64 hret;
2401         u16 dummy16 = 0;
2402         u64 dummy64 = 0;
2403         struct hcp_modify_qp_cb0 *cb0;
2404
2405         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2406         if (!cb0) {
2407                 ret = -ENOMEM;
2408                 goto out;
2409         }
2410
2411         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2412                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2413         if (hret != H_SUCCESS) {
2414                 ehea_error("query_ehea_qp failed (1)");
2415                 goto out;
2416         }
2417
2418         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2419         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2420                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2421                                      &dummy64, &dummy64, &dummy16, &dummy16);
2422         if (hret != H_SUCCESS) {
2423                 ehea_error("modify_ehea_qp failed (1)");
2424                 goto out;
2425         }
2426
2427         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2428                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2429         if (hret != H_SUCCESS) {
2430                 ehea_error("query_ehea_qp failed (2)");
2431                 goto out;
2432         }
2433
2434         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2435         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2436                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2437                                      &dummy64, &dummy64, &dummy16, &dummy16);
2438         if (hret != H_SUCCESS) {
2439                 ehea_error("modify_ehea_qp failed (2)");
2440                 goto out;
2441         }
2442
2443         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2444                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2445         if (hret != H_SUCCESS) {
2446                 ehea_error("query_ehea_qp failed (3)");
2447                 goto out;
2448         }
2449
2450         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2451         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2452                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2453                                      &dummy64, &dummy64, &dummy16, &dummy16);
2454         if (hret != H_SUCCESS) {
2455                 ehea_error("modify_ehea_qp failed (3)");
2456                 goto out;
2457         }
2458
2459         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2460                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2461         if (hret != H_SUCCESS) {
2462                 ehea_error("query_ehea_qp failed (4)");
2463                 goto out;
2464         }
2465
2466         ret = 0;
2467 out:
2468         free_page((unsigned long)cb0);
2469         return ret;
2470 }
2471
2472 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2473                                int add_tx_qps)
2474 {
2475         int ret, i;
2476         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2477         enum ehea_eq_type eq_type = EHEA_EQ;
2478
2479         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2480                                    EHEA_MAX_ENTRIES_EQ, 1);
2481         if (!port->qp_eq) {
2482                 ret = -EINVAL;
2483                 ehea_error("ehea_create_eq failed (qp_eq)");
2484                 goto out_kill_eq;
2485         }
2486
2487         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2488         pr_cfg.max_entries_scq = sq_entries * 2;
2489         pr_cfg.max_entries_sq = sq_entries;
2490         pr_cfg.max_entries_rq1 = rq1_entries;
2491         pr_cfg.max_entries_rq2 = rq2_entries;
2492         pr_cfg.max_entries_rq3 = rq3_entries;
2493
2494         pr_cfg_small_rx.max_entries_rcq = 1;
2495         pr_cfg_small_rx.max_entries_scq = sq_entries;
2496         pr_cfg_small_rx.max_entries_sq = sq_entries;
2497         pr_cfg_small_rx.max_entries_rq1 = 1;
2498         pr_cfg_small_rx.max_entries_rq2 = 1;
2499         pr_cfg_small_rx.max_entries_rq3 = 1;
2500
2501         for (i = 0; i < def_qps; i++) {
2502                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2503                 if (ret)
2504                         goto out_clean_pr;
2505         }
2506         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2507                 ret = ehea_init_port_res(port, &port->port_res[i],
2508                                          &pr_cfg_small_rx, i);
2509                 if (ret)
2510                         goto out_clean_pr;
2511         }
2512
2513         return 0;
2514
2515 out_clean_pr:
2516         while (--i >= 0)
2517                 ehea_clean_portres(port, &port->port_res[i]);
2518
2519 out_kill_eq:
2520         ehea_destroy_eq(port->qp_eq);
2521         return ret;
2522 }
2523
2524 static int ehea_clean_all_portres(struct ehea_port *port)
2525 {
2526         int ret = 0;
2527         int i;
2528
2529         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2530                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2531
2532         ret |= ehea_destroy_eq(port->qp_eq);
2533
2534         return ret;
2535 }
2536
2537 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2538 {
2539         if (adapter->active_ports)
2540                 return;
2541
2542         ehea_rem_mr(&adapter->mr);
2543 }
2544
2545 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2546 {
2547         if (adapter->active_ports)
2548                 return 0;
2549
2550         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2551 }
2552
2553 static int ehea_up(struct net_device *dev)
2554 {
2555         int ret, i;
2556         struct ehea_port *port = netdev_priv(dev);
2557
2558         if (port->state == EHEA_PORT_UP)
2559                 return 0;
2560
2561         ret = ehea_port_res_setup(port, port->num_def_qps,
2562                                   port->num_add_tx_qps);
2563         if (ret) {
2564                 ehea_error("port_res_failed");
2565                 goto out;
2566         }
2567
2568         /* Set default QP for this port */
2569         ret = ehea_configure_port(port);
2570         if (ret) {
2571                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2572                 goto out_clean_pr;
2573         }
2574
2575         ret = ehea_reg_interrupts(dev);
2576         if (ret) {
2577                 ehea_error("reg_interrupts failed. ret:%d", ret);
2578                 goto out_clean_pr;
2579         }
2580
2581         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2582                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2583                 if (ret) {
2584                         ehea_error("activate_qp failed");
2585                         goto out_free_irqs;
2586                 }
2587         }
2588
2589         for (i = 0; i < port->num_def_qps; i++) {
2590                 ret = ehea_fill_port_res(&port->port_res[i]);
2591                 if (ret) {
2592                         ehea_error("out_free_irqs");
2593                         goto out_free_irqs;
2594                 }
2595         }
2596
2597         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2598         if (ret) {
2599                 ret = -EIO;
2600                 goto out_free_irqs;
2601         }
2602
2603         port->state = EHEA_PORT_UP;
2604
2605         ret = 0;
2606         goto out;
2607
2608 out_free_irqs:
2609         ehea_free_interrupts(dev);
2610
2611 out_clean_pr:
2612         ehea_clean_all_portres(port);
2613 out:
2614         if (ret)
2615                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2616
2617         ehea_update_bcmc_registrations();
2618         ehea_update_firmware_handles();
2619
2620         return ret;
2621 }
2622
2623 static void port_napi_disable(struct ehea_port *port)
2624 {
2625         int i;
2626
2627         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2628                 napi_disable(&port->port_res[i].napi);
2629 }
2630
2631 static void port_napi_enable(struct ehea_port *port)
2632 {
2633         int i;
2634
2635         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2636                 napi_enable(&port->port_res[i].napi);
2637 }
2638
2639 static int ehea_open(struct net_device *dev)
2640 {
2641         int ret;
2642         struct ehea_port *port = netdev_priv(dev);
2643
2644         mutex_lock(&port->port_lock);
2645
2646         if (netif_msg_ifup(port))
2647                 ehea_info("enabling port %s", dev->name);
2648
2649         ret = ehea_up(dev);
2650         if (!ret) {
2651                 port_napi_enable(port);
2652                 netif_start_queue(dev);
2653         }
2654
2655         mutex_unlock(&port->port_lock);
2656
2657         return ret;
2658 }
2659
2660 static int ehea_down(struct net_device *dev)
2661 {
2662         int ret;
2663         struct ehea_port *port = netdev_priv(dev);
2664
2665         if (port->state == EHEA_PORT_DOWN)
2666                 return 0;
2667
2668         ehea_drop_multicast_list(dev);
2669         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2670
2671         ehea_free_interrupts(dev);
2672
2673         port->state = EHEA_PORT_DOWN;
2674
2675         ehea_update_bcmc_registrations();
2676
2677         ret = ehea_clean_all_portres(port);
2678         if (ret)
2679                 ehea_info("Failed freeing resources for %s. ret=%i",
2680                           dev->name, ret);
2681
2682         ehea_update_firmware_handles();
2683
2684         return ret;
2685 }
2686
2687 static int ehea_stop(struct net_device *dev)
2688 {
2689         int ret;
2690         struct ehea_port *port = netdev_priv(dev);
2691
2692         if (netif_msg_ifdown(port))
2693                 ehea_info("disabling port %s", dev->name);
2694
2695         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2696         cancel_work_sync(&port->reset_task);
2697         mutex_lock(&port->port_lock);
2698         netif_stop_queue(dev);
2699         port_napi_disable(port);
2700         ret = ehea_down(dev);
2701         mutex_unlock(&port->port_lock);
2702         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2703         return ret;
2704 }
2705
2706 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2707 {
2708         struct ehea_qp qp = *orig_qp;
2709         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2710         struct ehea_swqe *swqe;
2711         int wqe_index;
2712         int i;
2713
2714         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2715                 swqe = ehea_get_swqe(&qp, &wqe_index);
2716                 swqe->tx_control |= EHEA_SWQE_PURGE;
2717         }
2718 }
2719
2720 static void ehea_flush_sq(struct ehea_port *port)
2721 {
2722         int i;
2723
2724         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2725                 struct ehea_port_res *pr = &port->port_res[i];
2726                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2727                 int k = 0;
2728                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2729                         msleep(5);
2730                         if (++k == 20) {
2731                                 ehea_error("WARNING: sq not flushed completely");
2732                                 break;
2733                         }
2734                 }
2735         }
2736 }
2737
2738 int ehea_stop_qps(struct net_device *dev)
2739 {
2740         struct ehea_port *port = netdev_priv(dev);
2741         struct ehea_adapter *adapter = port->adapter;
2742         struct hcp_modify_qp_cb0 *cb0;
2743         int ret = -EIO;
2744         int dret;
2745         int i;
2746         u64 hret;
2747         u64 dummy64 = 0;
2748         u16 dummy16 = 0;
2749
2750         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2751         if (!cb0) {
2752                 ret = -ENOMEM;
2753                 goto out;
2754         }
2755
2756         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2757                 struct ehea_port_res *pr =  &port->port_res[i];
2758                 struct ehea_qp *qp = pr->qp;
2759
2760                 /* Purge send queue */
2761                 ehea_purge_sq(qp);
2762
2763                 /* Disable queue pair */
2764                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2765                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2766                                             cb0);
2767                 if (hret != H_SUCCESS) {
2768                         ehea_error("query_ehea_qp failed (1)");
2769                         goto out;
2770                 }
2771
2772                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2773                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2774
2775                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2776                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2777                                                             1), cb0, &dummy64,
2778                                              &dummy64, &dummy16, &dummy16);
2779                 if (hret != H_SUCCESS) {
2780                         ehea_error("modify_ehea_qp failed (1)");
2781                         goto out;
2782                 }
2783
2784                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2785                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2786                                             cb0);
2787                 if (hret != H_SUCCESS) {
2788                         ehea_error("query_ehea_qp failed (2)");
2789                         goto out;
2790                 }
2791
2792                 /* deregister shared memory regions */
2793                 dret = ehea_rem_smrs(pr);
2794                 if (dret) {
2795                         ehea_error("unreg shared memory region failed");
2796                         goto out;
2797                 }
2798         }
2799
2800         ret = 0;
2801 out:
2802         free_page((unsigned long)cb0);
2803
2804         return ret;
2805 }
2806
2807 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2808 {
2809         struct ehea_qp qp = *orig_qp;
2810         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2811         struct ehea_rwqe *rwqe;
2812         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2813         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2814         struct sk_buff *skb;
2815         u32 lkey = pr->recv_mr.lkey;
2816
2817
2818         int i;
2819         int index;
2820
2821         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2822                 rwqe = ehea_get_next_rwqe(&qp, 2);
2823                 rwqe->sg_list[0].l_key = lkey;
2824                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2825                 skb = skba_rq2[index];
2826                 if (skb)
2827                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2828         }
2829
2830         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2831                 rwqe = ehea_get_next_rwqe(&qp, 3);
2832                 rwqe->sg_list[0].l_key = lkey;
2833                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2834                 skb = skba_rq3[index];
2835                 if (skb)
2836                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2837         }
2838 }
2839
2840 int ehea_restart_qps(struct net_device *dev)
2841 {
2842         struct ehea_port *port = netdev_priv(dev);
2843         struct ehea_adapter *adapter = port->adapter;
2844         int ret = 0;
2845         int i;
2846
2847         struct hcp_modify_qp_cb0 *cb0;
2848         u64 hret;
2849         u64 dummy64 = 0;
2850         u16 dummy16 = 0;
2851
2852         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2853         if (!cb0) {
2854                 ret = -ENOMEM;
2855                 goto out;
2856         }
2857
2858         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2859                 struct ehea_port_res *pr =  &port->port_res[i];
2860                 struct ehea_qp *qp = pr->qp;
2861
2862                 ret = ehea_gen_smrs(pr);
2863                 if (ret) {
2864                         ehea_error("creation of shared memory regions failed");
2865                         goto out;
2866                 }
2867
2868                 ehea_update_rqs(qp, pr);
2869
2870                 /* Enable queue pair */
2871                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2872                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2873                                             cb0);
2874                 if (hret != H_SUCCESS) {
2875                         ehea_error("query_ehea_qp failed (1)");
2876                         goto out;
2877                 }
2878
2879                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2880                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2881
2882                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2883                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2884                                                             1), cb0, &dummy64,
2885                                              &dummy64, &dummy16, &dummy16);
2886                 if (hret != H_SUCCESS) {
2887                         ehea_error("modify_ehea_qp failed (1)");
2888                         goto out;
2889                 }
2890
2891                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2892                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2893                                             cb0);
2894                 if (hret != H_SUCCESS) {
2895                         ehea_error("query_ehea_qp failed (2)");
2896                         goto out;
2897                 }
2898
2899                 /* refill entire queue */
2900                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2901                 ehea_refill_rq2(pr, 0);
2902                 ehea_refill_rq3(pr, 0);
2903         }
2904 out:
2905         free_page((unsigned long)cb0);
2906
2907         return ret;
2908 }
2909
2910 static void ehea_reset_port(struct work_struct *work)
2911 {
2912         int ret;
2913         struct ehea_port *port =
2914                 container_of(work, struct ehea_port, reset_task);
2915         struct net_device *dev = port->netdev;
2916
2917         mutex_lock(&dlpar_mem_lock);
2918         port->resets++;
2919         mutex_lock(&port->port_lock);
2920         netif_stop_queue(dev);
2921
2922         port_napi_disable(port);
2923
2924         ehea_down(dev);
2925
2926         ret = ehea_up(dev);
2927         if (ret)
2928                 goto out;
2929
2930         ehea_set_multicast_list(dev);
2931
2932         if (netif_msg_timer(port))
2933                 ehea_info("Device %s resetted successfully", dev->name);
2934
2935         port_napi_enable(port);
2936
2937         netif_wake_queue(dev);
2938 out:
2939         mutex_unlock(&port->port_lock);
2940         mutex_unlock(&dlpar_mem_lock);
2941 }
2942
2943 static void ehea_rereg_mrs(struct work_struct *work)
2944 {
2945         int ret, i;
2946         struct ehea_adapter *adapter;
2947
2948         ehea_info("LPAR memory changed - re-initializing driver");
2949
2950         list_for_each_entry(adapter, &adapter_list, list)
2951                 if (adapter->active_ports) {
2952                         /* Shutdown all ports */
2953                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2954                                 struct ehea_port *port = adapter->port[i];
2955                                 struct net_device *dev;
2956
2957                                 if (!port)
2958                                         continue;
2959
2960                                 dev = port->netdev;
2961
2962                                 if (dev->flags & IFF_UP) {
2963                                         mutex_lock(&port->port_lock);
2964                                         netif_stop_queue(dev);
2965                                         ehea_flush_sq(port);
2966                                         ret = ehea_stop_qps(dev);
2967                                         if (ret) {
2968                                                 mutex_unlock(&port->port_lock);
2969                                                 goto out;
2970                                         }
2971                                         port_napi_disable(port);
2972                                         mutex_unlock(&port->port_lock);
2973                                 }
2974                                 reset_sq_restart_flag(port);
2975                         }
2976
2977                         /* Unregister old memory region */
2978                         ret = ehea_rem_mr(&adapter->mr);
2979                         if (ret) {
2980                                 ehea_error("unregister MR failed - driver"
2981                                            " inoperable!");
2982                                 goto out;
2983                         }
2984                 }
2985
2986         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2987
2988         list_for_each_entry(adapter, &adapter_list, list)
2989                 if (adapter->active_ports) {
2990                         /* Register new memory region */
2991                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2992                         if (ret) {
2993                                 ehea_error("register MR failed - driver"
2994                                            " inoperable!");
2995                                 goto out;
2996                         }
2997
2998                         /* Restart all ports */
2999                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3000                                 struct ehea_port *port = adapter->port[i];
3001
3002                                 if (port) {
3003                                         struct net_device *dev = port->netdev;
3004
3005                                         if (dev->flags & IFF_UP) {
3006                                                 mutex_lock(&port->port_lock);
3007                                                 port_napi_enable(port);
3008                                                 ret = ehea_restart_qps(dev);
3009                                                 check_sqs(port);
3010                                                 if (!ret)
3011                                                         netif_wake_queue(dev);
3012                                                 mutex_unlock(&port->port_lock);
3013                                         }
3014                                 }
3015                         }
3016                 }
3017         ehea_info("re-initializing driver complete");
3018 out:
3019         return;
3020 }
3021
3022 static void ehea_tx_watchdog(struct net_device *dev)
3023 {
3024         struct ehea_port *port = netdev_priv(dev);
3025
3026         if (netif_carrier_ok(dev) &&
3027             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3028                 ehea_schedule_port_reset(port);
3029 }
3030
3031 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3032 {
3033         struct hcp_query_ehea *cb;
3034         u64 hret;
3035         int ret;
3036
3037         cb = (void *)get_zeroed_page(GFP_KERNEL);
3038         if (!cb) {
3039                 ret = -ENOMEM;
3040                 goto out;
3041         }
3042
3043         hret = ehea_h_query_ehea(adapter->handle, cb);
3044
3045         if (hret != H_SUCCESS) {
3046                 ret = -EIO;
3047                 goto out_herr;
3048         }
3049
3050         adapter->max_mc_mac = cb->max_mc_mac - 1;
3051         ret = 0;
3052
3053 out_herr:
3054         free_page((unsigned long)cb);
3055 out:
3056         return ret;
3057 }
3058
3059 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3060 {
3061         struct hcp_ehea_port_cb4 *cb4;
3062         u64 hret;
3063         int ret = 0;
3064
3065         *jumbo = 0;
3066
3067         /* (Try to) enable *jumbo frames */
3068         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3069         if (!cb4) {
3070                 ehea_error("no mem for cb4");
3071                 ret = -ENOMEM;
3072                 goto out;
3073         } else {
3074                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3075                                               port->logical_port_id,
3076                                               H_PORT_CB4,
3077                                               H_PORT_CB4_JUMBO, cb4);
3078                 if (hret == H_SUCCESS) {
3079                         if (cb4->jumbo_frame)
3080                                 *jumbo = 1;
3081                         else {
3082                                 cb4->jumbo_frame = 1;
3083                                 hret = ehea_h_modify_ehea_port(port->adapter->
3084                                                                handle,
3085                                                                port->
3086                                                                logical_port_id,
3087                                                                H_PORT_CB4,
3088                                                                H_PORT_CB4_JUMBO,
3089                                                                cb4);
3090                                 if (hret == H_SUCCESS)
3091                                         *jumbo = 1;
3092                         }
3093                 } else
3094                         ret = -EINVAL;
3095
3096                 free_page((unsigned long)cb4);
3097         }
3098 out:
3099         return ret;
3100 }
3101
3102 static ssize_t ehea_show_port_id(struct device *dev,
3103                                  struct device_attribute *attr, char *buf)
3104 {
3105         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3106         return sprintf(buf, "%d", port->logical_port_id);
3107 }
3108
3109 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3110                    NULL);
3111
3112 static void __devinit logical_port_release(struct device *dev)
3113 {
3114         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3115         of_node_put(port->ofdev.dev.of_node);
3116 }
3117
3118 static struct device *ehea_register_port(struct ehea_port *port,
3119                                          struct device_node *dn)
3120 {
3121         int ret;
3122
3123         port->ofdev.dev.of_node = of_node_get(dn);
3124         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3125         port->ofdev.dev.bus = &ibmebus_bus_type;
3126
3127         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3128         port->ofdev.dev.release = logical_port_release;
3129
3130         ret = of_device_register(&port->ofdev);
3131         if (ret) {
3132                 ehea_error("failed to register device. ret=%d", ret);
3133                 goto out;
3134         }
3135
3136         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3137         if (ret) {
3138                 ehea_error("failed to register attributes, ret=%d", ret);
3139                 goto out_unreg_of_dev;
3140         }
3141
3142         return &port->ofdev.dev;
3143
3144 out_unreg_of_dev:
3145         of_device_unregister(&port->ofdev);
3146 out:
3147         return NULL;
3148 }
3149
3150 static void ehea_unregister_port(struct ehea_port *port)
3151 {
3152         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3153         of_device_unregister(&port->ofdev);
3154 }
3155
3156 static const struct net_device_ops ehea_netdev_ops = {
3157         .ndo_open               = ehea_open,
3158         .ndo_stop               = ehea_stop,
3159         .ndo_start_xmit         = ehea_start_xmit,
3160 #ifdef CONFIG_NET_POLL_CONTROLLER
3161         .ndo_poll_controller    = ehea_netpoll,
3162 #endif
3163         .ndo_get_stats          = ehea_get_stats,
3164         .ndo_set_mac_address    = ehea_set_mac_addr,
3165         .ndo_validate_addr      = eth_validate_addr,
3166         .ndo_set_multicast_list = ehea_set_multicast_list,
3167         .ndo_change_mtu         = ehea_change_mtu,
3168         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3169         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3170         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3171         .ndo_tx_timeout         = ehea_tx_watchdog,
3172 };
3173
3174 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3175                                          u32 logical_port_id,
3176                                          struct device_node *dn)
3177 {
3178         int ret;
3179         struct net_device *dev;
3180         struct ehea_port *port;
3181         struct device *port_dev;
3182         int jumbo;
3183
3184         /* allocate memory for the port structures */
3185         dev = alloc_etherdev(sizeof(struct ehea_port));
3186
3187         if (!dev) {
3188                 ehea_error("no mem for net_device");
3189                 ret = -ENOMEM;
3190                 goto out_err;
3191         }
3192
3193         port = netdev_priv(dev);
3194
3195         mutex_init(&port->port_lock);
3196         port->state = EHEA_PORT_DOWN;
3197         port->sig_comp_iv = sq_entries / 10;
3198
3199         port->adapter = adapter;
3200         port->netdev = dev;
3201         port->logical_port_id = logical_port_id;
3202
3203         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3204
3205         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3206         if (!port->mc_list) {
3207                 ret = -ENOMEM;
3208                 goto out_free_ethdev;
3209         }
3210
3211         INIT_LIST_HEAD(&port->mc_list->list);
3212
3213         ret = ehea_sense_port_attr(port);
3214         if (ret)
3215                 goto out_free_mc_list;
3216
3217         port_dev = ehea_register_port(port, dn);
3218         if (!port_dev)
3219                 goto out_free_mc_list;
3220
3221         SET_NETDEV_DEV(dev, port_dev);
3222
3223         /* initialize net_device structure */
3224         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3225
3226         dev->netdev_ops = &ehea_netdev_ops;
3227         ehea_set_ethtool_ops(dev);
3228
3229         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3230                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3231                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3232                       | NETIF_F_LLTX;
3233         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3234
3235         INIT_WORK(&port->reset_task, ehea_reset_port);
3236
3237         ret = register_netdev(dev);
3238         if (ret) {
3239                 ehea_error("register_netdev failed. ret=%d", ret);
3240                 goto out_unreg_port;
3241         }
3242
3243         port->lro_max_aggr = lro_max_aggr;
3244
3245         ret = ehea_get_jumboframe_status(port, &jumbo);
3246         if (ret)
3247                 ehea_error("failed determining jumbo frame status for %s",
3248                            port->netdev->name);
3249
3250         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3251                   jumbo == 1 ? "en" : "dis");
3252
3253         adapter->active_ports++;
3254
3255         return port;
3256
3257 out_unreg_port:
3258         ehea_unregister_port(port);
3259
3260 out_free_mc_list:
3261         kfree(port->mc_list);
3262
3263 out_free_ethdev:
3264         free_netdev(dev);
3265
3266 out_err:
3267         ehea_error("setting up logical port with id=%d failed, ret=%d",
3268                    logical_port_id, ret);
3269         return NULL;
3270 }
3271
3272 static void ehea_shutdown_single_port(struct ehea_port *port)
3273 {
3274         struct ehea_adapter *adapter = port->adapter;
3275         unregister_netdev(port->netdev);
3276         ehea_unregister_port(port);
3277         kfree(port->mc_list);
3278         free_netdev(port->netdev);
3279         adapter->active_ports--;
3280 }
3281
3282 static int ehea_setup_ports(struct ehea_adapter *adapter)
3283 {
3284         struct device_node *lhea_dn;
3285         struct device_node *eth_dn = NULL;
3286
3287         const u32 *dn_log_port_id;
3288         int i = 0;
3289
3290         lhea_dn = adapter->ofdev->dev.of_node;
3291         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3292
3293                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3294                                                  NULL);
3295                 if (!dn_log_port_id) {
3296                         ehea_error("bad device node: eth_dn name=%s",
3297                                    eth_dn->full_name);
3298                         continue;
3299                 }
3300
3301                 if (ehea_add_adapter_mr(adapter)) {
3302                         ehea_error("creating MR failed");
3303                         of_node_put(eth_dn);
3304                         return -EIO;
3305                 }
3306
3307                 adapter->port[i] = ehea_setup_single_port(adapter,
3308                                                           *dn_log_port_id,
3309                                                           eth_dn);
3310                 if (adapter->port[i])
3311                         ehea_info("%s -> logical port id #%d",
3312                                   adapter->port[i]->netdev->name,
3313                                   *dn_log_port_id);
3314                 else
3315                         ehea_remove_adapter_mr(adapter);
3316
3317                 i++;
3318         }
3319         return 0;
3320 }
3321
3322 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3323                                            u32 logical_port_id)
3324 {
3325         struct device_node *lhea_dn;
3326         struct device_node *eth_dn = NULL;
3327         const u32 *dn_log_port_id;
3328
3329         lhea_dn = adapter->ofdev->dev.of_node;
3330         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3331
3332                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3333                                                  NULL);
3334                 if (dn_log_port_id)
3335                         if (*dn_log_port_id == logical_port_id)
3336                                 return eth_dn;
3337         }
3338
3339         return NULL;
3340 }
3341
3342 static ssize_t ehea_probe_port(struct device *dev,
3343                                struct device_attribute *attr,
3344                                const char *buf, size_t count)
3345 {
3346         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3347         struct ehea_port *port;
3348         struct device_node *eth_dn = NULL;
3349         int i;
3350
3351         u32 logical_port_id;
3352
3353         sscanf(buf, "%d", &logical_port_id);
3354
3355         port = ehea_get_port(adapter, logical_port_id);
3356
3357         if (port) {
3358                 ehea_info("adding port with logical port id=%d failed. port "
3359                           "already configured as %s.", logical_port_id,
3360                           port->netdev->name);
3361                 return -EINVAL;
3362         }
3363
3364         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3365
3366         if (!eth_dn) {
3367                 ehea_info("no logical port with id %d found", logical_port_id);
3368                 return -EINVAL;
3369         }
3370
3371         if (ehea_add_adapter_mr(adapter)) {
3372                 ehea_error("creating MR failed");
3373                 return -EIO;
3374         }
3375
3376         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3377
3378         of_node_put(eth_dn);
3379
3380         if (port) {
3381                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3382                         if (!adapter->port[i]) {
3383                                 adapter->port[i] = port;
3384                                 break;
3385                         }
3386
3387                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3388                           logical_port_id);
3389         } else {
3390                 ehea_remove_adapter_mr(adapter);
3391                 return -EIO;
3392         }
3393
3394         return (ssize_t) count;
3395 }
3396
3397 static ssize_t ehea_remove_port(struct device *dev,
3398                                 struct device_attribute *attr,
3399                                 const char *buf, size_t count)
3400 {
3401         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3402         struct ehea_port *port;
3403         int i;
3404         u32 logical_port_id;
3405
3406         sscanf(buf, "%d", &logical_port_id);
3407
3408         port = ehea_get_port(adapter, logical_port_id);
3409
3410         if (port) {
3411                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3412                           logical_port_id);
3413
3414                 ehea_shutdown_single_port(port);
3415
3416                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3417                         if (adapter->port[i] == port) {
3418                                 adapter->port[i] = NULL;
3419                                 break;
3420                         }
3421         } else {
3422                 ehea_error("removing port with logical port id=%d failed. port "
3423                            "not configured.", logical_port_id);
3424                 return -EINVAL;
3425         }
3426
3427         ehea_remove_adapter_mr(adapter);
3428
3429         return (ssize_t) count;
3430 }
3431
3432 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3433 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3434
3435 int ehea_create_device_sysfs(struct platform_device *dev)
3436 {
3437         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3438         if (ret)
3439                 goto out;
3440
3441         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3442 out:
3443         return ret;
3444 }
3445
3446 void ehea_remove_device_sysfs(struct platform_device *dev)
3447 {
3448         device_remove_file(&dev->dev, &dev_attr_probe_port);
3449         device_remove_file(&dev->dev, &dev_attr_remove_port);
3450 }
3451
3452 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3453                                         const struct of_device_id *id)
3454 {
3455         struct ehea_adapter *adapter;
3456         const u64 *adapter_handle;
3457         int ret;
3458
3459         if (!dev || !dev->dev.of_node) {
3460                 ehea_error("Invalid ibmebus device probed");
3461                 return -EINVAL;
3462         }
3463
3464         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3465         if (!adapter) {
3466                 ret = -ENOMEM;
3467                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3468                 goto out;
3469         }
3470
3471         list_add(&adapter->list, &adapter_list);
3472
3473         adapter->ofdev = dev;
3474
3475         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3476                                          NULL);
3477         if (adapter_handle)
3478                 adapter->handle = *adapter_handle;
3479
3480         if (!adapter->handle) {
3481                 dev_err(&dev->dev, "failed getting handle for adapter"
3482                         " '%s'\n", dev->dev.of_node->full_name);
3483                 ret = -ENODEV;
3484                 goto out_free_ad;
3485         }
3486
3487         adapter->pd = EHEA_PD_ID;
3488
3489         dev_set_drvdata(&dev->dev, adapter);
3490
3491
3492         /* initialize adapter and ports */
3493         /* get adapter properties */
3494         ret = ehea_sense_adapter_attr(adapter);
3495         if (ret) {
3496                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3497                 goto out_free_ad;
3498         }
3499
3500         adapter->neq = ehea_create_eq(adapter,
3501                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3502         if (!adapter->neq) {
3503                 ret = -EIO;
3504                 dev_err(&dev->dev, "NEQ creation failed\n");
3505                 goto out_free_ad;
3506         }
3507
3508         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3509                      (unsigned long)adapter);
3510
3511         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3512                                   ehea_interrupt_neq, IRQF_DISABLED,
3513                                   "ehea_neq", adapter);
3514         if (ret) {
3515                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3516                 goto out_kill_eq;
3517         }
3518
3519         ret = ehea_create_device_sysfs(dev);
3520         if (ret)
3521                 goto out_free_irq;
3522
3523         ret = ehea_setup_ports(adapter);
3524         if (ret) {
3525                 dev_err(&dev->dev, "setup_ports failed\n");
3526                 goto out_rem_dev_sysfs;
3527         }
3528
3529         ret = 0;
3530         goto out;
3531
3532 out_rem_dev_sysfs:
3533         ehea_remove_device_sysfs(dev);
3534
3535 out_free_irq:
3536         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3537
3538 out_kill_eq:
3539         ehea_destroy_eq(adapter->neq);
3540
3541 out_free_ad:
3542         list_del(&adapter->list);
3543         kfree(adapter);
3544
3545 out:
3546         ehea_update_firmware_handles();
3547
3548         return ret;
3549 }
3550
3551 static int __devexit ehea_remove(struct platform_device *dev)
3552 {
3553         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3554         int i;
3555
3556         for (i = 0; i < EHEA_MAX_PORTS; i++)
3557                 if (adapter->port[i]) {
3558                         ehea_shutdown_single_port(adapter->port[i]);
3559                         adapter->port[i] = NULL;
3560                 }
3561
3562         ehea_remove_device_sysfs(dev);
3563
3564         flush_scheduled_work();
3565
3566         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3567         tasklet_kill(&adapter->neq_tasklet);
3568
3569         ehea_destroy_eq(adapter->neq);
3570         ehea_remove_adapter_mr(adapter);
3571         list_del(&adapter->list);
3572         kfree(adapter);
3573
3574         ehea_update_firmware_handles();
3575
3576         return 0;
3577 }
3578
3579 void ehea_crash_handler(void)
3580 {
3581         int i;
3582
3583         if (ehea_fw_handles.arr)
3584                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3585                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3586                                              ehea_fw_handles.arr[i].fwh,
3587                                              FORCE_FREE);
3588
3589         if (ehea_bcmc_regs.arr)
3590                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3591                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3592                                               ehea_bcmc_regs.arr[i].port_id,
3593                                               ehea_bcmc_regs.arr[i].reg_type,
3594                                               ehea_bcmc_regs.arr[i].macaddr,
3595                                               0, H_DEREG_BCMC);
3596 }
3597
3598 static int ehea_mem_notifier(struct notifier_block *nb,
3599                              unsigned long action, void *data)
3600 {
3601         int ret = NOTIFY_BAD;
3602         struct memory_notify *arg = data;
3603
3604         mutex_lock(&dlpar_mem_lock);
3605
3606         switch (action) {
3607         case MEM_CANCEL_OFFLINE:
3608                 ehea_info("memory offlining canceled");
3609                 /* Readd canceled memory block */
3610         case MEM_ONLINE:
3611                 ehea_info("memory is going online");
3612                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3613                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3614                         goto out_unlock;
3615                 ehea_rereg_mrs(NULL);
3616                 break;
3617         case MEM_GOING_OFFLINE:
3618                 ehea_info("memory is going offline");
3619                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3620                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3621                         goto out_unlock;
3622                 ehea_rereg_mrs(NULL);
3623                 break;
3624         default:
3625                 break;
3626         }
3627
3628         ehea_update_firmware_handles();
3629         ret = NOTIFY_OK;
3630
3631 out_unlock:
3632         mutex_unlock(&dlpar_mem_lock);
3633         return ret;
3634 }
3635
3636 static struct notifier_block ehea_mem_nb = {
3637         .notifier_call = ehea_mem_notifier,
3638 };
3639
3640 static int ehea_reboot_notifier(struct notifier_block *nb,
3641                                 unsigned long action, void *unused)
3642 {
3643         if (action == SYS_RESTART) {
3644                 ehea_info("Reboot: freeing all eHEA resources");
3645                 ibmebus_unregister_driver(&ehea_driver);
3646         }
3647         return NOTIFY_DONE;
3648 }
3649
3650 static struct notifier_block ehea_reboot_nb = {
3651         .notifier_call = ehea_reboot_notifier,
3652 };
3653
3654 static int check_module_parm(void)
3655 {
3656         int ret = 0;
3657
3658         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3659             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3660                 ehea_info("Bad parameter: rq1_entries");
3661                 ret = -EINVAL;
3662         }
3663         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3664             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3665                 ehea_info("Bad parameter: rq2_entries");
3666                 ret = -EINVAL;
3667         }
3668         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3669             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3670                 ehea_info("Bad parameter: rq3_entries");
3671                 ret = -EINVAL;
3672         }
3673         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3674             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3675                 ehea_info("Bad parameter: sq_entries");
3676                 ret = -EINVAL;
3677         }
3678
3679         return ret;
3680 }
3681
3682 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3683                                       char *buf)
3684 {
3685         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3686 }
3687
3688 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3689                    ehea_show_capabilities, NULL);
3690
3691 int __init ehea_module_init(void)
3692 {
3693         int ret;
3694
3695         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3696                DRV_VERSION);
3697
3698
3699         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3700         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3701         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3702
3703         mutex_init(&ehea_fw_handles.lock);
3704         spin_lock_init(&ehea_bcmc_regs.lock);
3705
3706         ret = check_module_parm();
3707         if (ret)
3708                 goto out;
3709
3710         ret = ehea_create_busmap();
3711         if (ret)
3712                 goto out;
3713
3714         ret = register_reboot_notifier(&ehea_reboot_nb);
3715         if (ret)
3716                 ehea_info("failed registering reboot notifier");
3717
3718         ret = register_memory_notifier(&ehea_mem_nb);
3719         if (ret)
3720                 ehea_info("failed registering memory remove notifier");
3721
3722         ret = crash_shutdown_register(ehea_crash_handler);
3723         if (ret)
3724                 ehea_info("failed registering crash handler");
3725
3726         ret = ibmebus_register_driver(&ehea_driver);
3727         if (ret) {
3728                 ehea_error("failed registering eHEA device driver on ebus");
3729                 goto out2;
3730         }
3731
3732         ret = driver_create_file(&ehea_driver.driver,
3733                                  &driver_attr_capabilities);
3734         if (ret) {
3735                 ehea_error("failed to register capabilities attribute, ret=%d",
3736                            ret);
3737                 goto out3;
3738         }
3739
3740         return ret;
3741
3742 out3:
3743         ibmebus_unregister_driver(&ehea_driver);
3744 out2:
3745         unregister_memory_notifier(&ehea_mem_nb);
3746         unregister_reboot_notifier(&ehea_reboot_nb);
3747         crash_shutdown_unregister(ehea_crash_handler);
3748 out:
3749         return ret;
3750 }
3751
3752 static void __exit ehea_module_exit(void)
3753 {
3754         int ret;
3755
3756         flush_scheduled_work();
3757         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3758         ibmebus_unregister_driver(&ehea_driver);
3759         unregister_reboot_notifier(&ehea_reboot_nb);
3760         ret = crash_shutdown_unregister(ehea_crash_handler);
3761         if (ret)
3762                 ehea_info("failed unregistering crash handler");
3763         unregister_memory_notifier(&ehea_mem_nb);
3764         kfree(ehea_fw_handles.arr);
3765         kfree(ehea_bcmc_regs.arr);
3766         ehea_destroy_busmap();
3767 }
3768
3769 module_init(ehea_module_init);
3770 module_exit(ehea_module_exit);