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