drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs;
  65 static int use_lro;
  66 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  67 static int num_tx_qps = EHEA_NUM_TX_QP;
  68 static int prop_carrier_state;
  69
  70 module_param(msg_level, int, 0);
  71 module_param(rq1_entries, int, 0);
  72 module_param(rq2_entries, int, 0);
  73 module_param(rq3_entries, int, 0);
  74 module_param(sq_entries, int, 0);
  75 module_param(prop_carrier_state, int, 0);
  76 module_param(use_mcs, int, 0);
  77 module_param(use_lro, int, 0);
  78 module_param(lro_max_aggr, int, 0);
  79 module_param(num_tx_qps, int, 0);
  80
  81 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  82 MODULE_PARM_DESC(msg_level, "msg_level");
  83 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  84                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  85 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  88 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  91 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  94 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  95                  "[2^x - 1], x = [6..14]. Default = "
  96                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  97 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  98
  99 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
 100                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 101 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 102                  "Default = 0");
 103
 104 static int port_name_cnt;
 105 static LIST_HEAD(adapter_list);
 106 static unsigned long ehea_driver_flags;
 107 static DEFINE_MUTEX(dlpar_mem_lock);
 108 struct ehea_fw_handle_array ehea_fw_handles;
 109 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 110
 111
 112 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 113                                         const struct of_device_id *id);
 114
 115 static int __devexit ehea_remove(struct platform_device *dev);
 116
 117 static struct of_device_id ehea_device_table[] = {
 118         {
 119                 .name = "lhea",
 120                 .compatible = "IBM,lhea",
 121         },
 122         {},
 123 };
 124 MODULE_DEVICE_TABLE(of, ehea_device_table);
 125
 126 static struct of_platform_driver ehea_driver = {
 127         .driver = {
 128                 .name = "ehea",
 129                 .owner = THIS_MODULE,
 130                 .of_match_table = ehea_device_table,
 131         },
 132         .probe = ehea_probe_adapter,
 133         .remove = ehea_remove,
 134 };
 135
 136 void ehea_dump(void *adr, int len, char *msg)
 137 {
 138         int x;
 139         unsigned char *deb = adr;
 140         for (x = 0; x < len; x += 16) {
 141                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 142                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 143                 deb += 16;
 144         }
 145 }
 146
 147 void ehea_schedule_port_reset(struct ehea_port *port)
 148 {
 149         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 150                 schedule_work(&port->reset_task);
 151 }
 152
 153 static void ehea_update_firmware_handles(void)
 154 {
 155         struct ehea_fw_handle_entry *arr = NULL;
 156         struct ehea_adapter *adapter;
 157         int num_adapters = 0;
 158         int num_ports = 0;
 159         int num_portres = 0;
 160         int i = 0;
 161         int num_fw_handles, k, l;
 162
 163         /* Determine number of handles */
 164         mutex_lock(&ehea_fw_handles.lock);
 165
 166         list_for_each_entry(adapter, &adapter_list, list) {
 167                 num_adapters++;
 168
 169                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 170                         struct ehea_port *port = adapter->port[k];
 171
 172                         if (!port || (port->state != EHEA_PORT_UP))
 173                                 continue;
 174
 175                         num_ports++;
 176                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 177                 }
 178         }
 179
 180         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 181                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 182                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 183
 184         if (num_fw_handles) {
 185                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 186                 if (!arr)
 187                         goto out;  /* Keep the existing array */
 188         } else
 189                 goto out_update;
 190
 191         list_for_each_entry(adapter, &adapter_list, list) {
 192                 if (num_adapters == 0)
 193                         break;
 194
 195                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 196                         struct ehea_port *port = adapter->port[k];
 197
 198                         if (!port || (port->state != EHEA_PORT_UP) ||
 199                             (num_ports == 0))
 200                                 continue;
 201
 202                         for (l = 0;
 203                              l < port->num_def_qps + port->num_add_tx_qps;
 204                              l++) {
 205                                 struct ehea_port_res *pr = &port->port_res[l];
 206
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->qp->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->send_cq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->eq->fw_handle;
 215                                 arr[i].adh = adapter->handle;
 216                                 arr[i++].fwh = pr->send_mr.handle;
 217                                 arr[i].adh = adapter->handle;
 218                                 arr[i++].fwh = pr->recv_mr.handle;
 219                         }
 220                         arr[i].adh = adapter->handle;
 221                         arr[i++].fwh = port->qp_eq->fw_handle;
 222                         num_ports--;
 223                 }
 224
 225                 arr[i].adh = adapter->handle;
 226                 arr[i++].fwh = adapter->neq->fw_handle;
 227
 228                 if (adapter->mr.handle) {
 229                         arr[i].adh = adapter->handle;
 230                         arr[i++].fwh = adapter->mr.handle;
 231                 }
 232                 num_adapters--;
 233         }
 234
 235 out_update:
 236         kfree(ehea_fw_handles.arr);
 237         ehea_fw_handles.arr = arr;
 238         ehea_fw_handles.num_entries = i;
 239 out:
 240         mutex_unlock(&ehea_fw_handles.lock);
 241 }
 242
 243 static void ehea_update_bcmc_registrations(void)
 244 {
 245         unsigned long flags;
 246         struct ehea_bcmc_reg_entry *arr = NULL;
 247         struct ehea_adapter *adapter;
 248         struct ehea_mc_list *mc_entry;
 249         int num_registrations = 0;
 250         int i = 0;
 251         int k;
 252
 253         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 254
 255         /* Determine number of registrations */
 256         list_for_each_entry(adapter, &adapter_list, list)
 257                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 258                         struct ehea_port *port = adapter->port[k];
 259
 260                         if (!port || (port->state != EHEA_PORT_UP))
 261                                 continue;
 262
 263                         num_registrations += 2; /* Broadcast registrations */
 264
 265                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 266                                 num_registrations += 2;
 267                 }
 268
 269         if (num_registrations) {
 270                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 271                 if (!arr)
 272                         goto out;  /* Keep the existing array */
 273         } else
 274                 goto out_update;
 275
 276         list_for_each_entry(adapter, &adapter_list, list) {
 277                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 278                         struct ehea_port *port = adapter->port[k];
 279
 280                         if (!port || (port->state != EHEA_PORT_UP))
 281                                 continue;
 282
 283                         if (num_registrations == 0)
 284                                 goto out_update;
 285
 286                         arr[i].adh = adapter->handle;
 287                         arr[i].port_id = port->logical_port_id;
 288                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 289                                           EHEA_BCMC_UNTAGGED;
 290                         arr[i++].macaddr = port->mac_addr;
 291
 292                         arr[i].adh = adapter->handle;
 293                         arr[i].port_id = port->logical_port_id;
 294                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 295                                           EHEA_BCMC_VLANID_ALL;
 296                         arr[i++].macaddr = port->mac_addr;
 297                         num_registrations -= 2;
 298
 299                         list_for_each_entry(mc_entry,
 300                                             &port->mc_list->list, list) {
 301                                 if (num_registrations == 0)
 302                                         goto out_update;
 303
 304                                 arr[i].adh = adapter->handle;
 305                                 arr[i].port_id = port->logical_port_id;
 306                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 307                                                   EHEA_BCMC_MULTICAST |
 308                                                   EHEA_BCMC_UNTAGGED;
 309                                 arr[i++].macaddr = mc_entry->macaddr;
 310
 311                                 arr[i].adh = adapter->handle;
 312                                 arr[i].port_id = port->logical_port_id;
 313                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 314                                                   EHEA_BCMC_MULTICAST |
 315                                                   EHEA_BCMC_VLANID_ALL;
 316                                 arr[i++].macaddr = mc_entry->macaddr;
 317                                 num_registrations -= 2;
 318                         }
 319                 }
 320         }
 321
 322 out_update:
 323         kfree(ehea_bcmc_regs.arr);
 324         ehea_bcmc_regs.arr = arr;
 325         ehea_bcmc_regs.num_entries = i;
 326 out:
 327         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 328 }
 329
 330 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 331 {
 332         struct ehea_port *port = netdev_priv(dev);
 333         struct net_device_stats *stats = &port->stats;
 334         struct hcp_ehea_port_cb2 *cb2;
 335         u64 hret, rx_packets, tx_packets, rx_bytes = 0, tx_bytes = 0;
 336         int i;
 337
 338         memset(stats, 0, sizeof(*stats));
 339
 340         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 341         if (!cb2) {
 342                 netdev_err(dev, "no mem for cb2\n");
 343                 goto out;
 344         }
 345
 346         hret = ehea_h_query_ehea_port(port->adapter->handle,
 347                                       port->logical_port_id,
 348                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 349         if (hret != H_SUCCESS) {
 350                 netdev_err(dev, "query_ehea_port failed\n");
 351                 goto out_herr;
 352         }
 353
 354         if (netif_msg_hw(port))
 355                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 356
 357         rx_packets = 0;
 358         for (i = 0; i < port->num_def_qps; i++) {
 359                 rx_packets += port->port_res[i].rx_packets;
 360                 rx_bytes   += port->port_res[i].rx_bytes;
 361         }
 362
 363         tx_packets = 0;
 364         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 365                 tx_packets += port->port_res[i].tx_packets;
 366                 tx_bytes   += port->port_res[i].tx_bytes;
 367         }
 368
 369         stats->tx_packets = tx_packets;
 370         stats->multicast = cb2->rxmcp;
 371         stats->rx_errors = cb2->rxuerr;
 372         stats->rx_bytes = rx_bytes;
 373         stats->tx_bytes = tx_bytes;
 374         stats->rx_packets = rx_packets;
 375
 376 out_herr:
 377         free_page((unsigned long)cb2);
 378 out:
 379         return stats;
 380 }
 381
 382 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 383 {
 384         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 385         struct net_device *dev = pr->port->netdev;
 386         int max_index_mask = pr->rq1_skba.len - 1;
 387         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 388         int adder = 0;
 389         int i;
 390
 391         pr->rq1_skba.os_skbs = 0;
 392
 393         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 394                 if (nr_of_wqes > 0)
 395                         pr->rq1_skba.index = index;
 396                 pr->rq1_skba.os_skbs = fill_wqes;
 397                 return;
 398         }
 399
 400         for (i = 0; i < fill_wqes; i++) {
 401                 if (!skb_arr_rq1[index]) {
 402                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 403                                                               EHEA_L_PKT_SIZE);
 404                         if (!skb_arr_rq1[index]) {
 405                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 406                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 407                                 break;
 408                         }
 409                 }
 410                 index--;
 411                 index &= max_index_mask;
 412                 adder++;
 413         }
 414
 415         if (adder == 0)
 416                 return;
 417
 418         /* Ring doorbell */
 419         ehea_update_rq1a(pr->qp, adder);
 420 }
 421
 422 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 423 {
 424         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 425         struct net_device *dev = pr->port->netdev;
 426         int i;
 427
 428         if (nr_rq1a > pr->rq1_skba.len) {
 429                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 430                 return;
 431         }
 432
 433         for (i = 0; i < nr_rq1a; i++) {
 434                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 435                 if (!skb_arr_rq1[i]) {
 436                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 437                         break;
 438                 }
 439         }
 440         /* Ring doorbell */
 441         ehea_update_rq1a(pr->qp, i - 1);
 442 }
 443
 444 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 445                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 446                               int num_wqes, int wqe_type, int packet_size)
 447 {
 448         struct net_device *dev = pr->port->netdev;
 449         struct ehea_qp *qp = pr->qp;
 450         struct sk_buff **skb_arr = q_skba->arr;
 451         struct ehea_rwqe *rwqe;
 452         int i, index, max_index_mask, fill_wqes;
 453         int adder = 0;
 454         int ret = 0;
 455
 456         fill_wqes = q_skba->os_skbs + num_wqes;
 457         q_skba->os_skbs = 0;
 458
 459         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 460                 q_skba->os_skbs = fill_wqes;
 461                 return ret;
 462         }
 463
 464         index = q_skba->index;
 465         max_index_mask = q_skba->len - 1;
 466         for (i = 0; i < fill_wqes; i++) {
 467                 u64 tmp_addr;
 468                 struct sk_buff *skb;
 469
 470                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 471                 if (!skb) {
 472                         q_skba->os_skbs = fill_wqes - i;
 473                         if (q_skba->os_skbs == q_skba->len - 2) {
 474                                 netdev_info(pr->port->netdev,
 475                                             "rq%i ran dry - no mem for skb\n",
 476                                             rq_nr);
 477                                 ret = -ENOMEM;
 478                         }
 479                         break;
 480                 }
 481
 482                 skb_arr[index] = skb;
 483                 tmp_addr = ehea_map_vaddr(skb->data);
 484                 if (tmp_addr == -1) {
 485                         dev_kfree_skb(skb);
 486                         q_skba->os_skbs = fill_wqes - i;
 487                         ret = 0;
 488                         break;
 489                 }
 490
 491                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 492                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 493                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 494                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 495                 rwqe->sg_list[0].vaddr = tmp_addr;
 496                 rwqe->sg_list[0].len = packet_size;
 497                 rwqe->data_segments = 1;
 498
 499                 index++;
 500                 index &= max_index_mask;
 501                 adder++;
 502         }
 503
 504         q_skba->index = index;
 505         if (adder == 0)
 506                 goto out;
 507
 508         /* Ring doorbell */
 509         iosync();
 510         if (rq_nr == 2)
 511                 ehea_update_rq2a(pr->qp, adder);
 512         else
 513                 ehea_update_rq3a(pr->qp, adder);
 514 out:
 515         return ret;
 516 }
 517
 518
 519 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 520 {
 521         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 522                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 523                                   EHEA_RQ2_PKT_SIZE);
 524 }
 525
 526
 527 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 528 {
 529         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 530                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 531                                   EHEA_MAX_PACKET_SIZE);
 532 }
 533
 534 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 535 {
 536         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 537         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 538                 return 0;
 539         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 540             (cqe->header_length == 0))
 541                 return 0;
 542         return -EINVAL;
 543 }
 544
 545 static inline void ehea_fill_skb(struct net_device *dev,
 546                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 547 {
 548         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 549
 550         skb_put(skb, length);
 551         skb->protocol = eth_type_trans(skb, dev);
 552
 553         /* The packet was not an IPV4 packet so a complemented checksum was
 554            calculated. The value is found in the Internet Checksum field. */
 555         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 556                 skb->ip_summed = CHECKSUM_COMPLETE;
 557                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 558         } else
 559                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 560 }
 561
 562 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 563                                                int arr_len,
 564                                                struct ehea_cqe *cqe)
 565 {
 566         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 567         struct sk_buff *skb;
 568         void *pref;
 569         int x;
 570
 571         x = skb_index + 1;
 572         x &= (arr_len - 1);
 573
 574         pref = skb_array[x];
 575         if (pref) {
 576                 prefetchw(pref);
 577                 prefetchw(pref + EHEA_CACHE_LINE);
 578
 579                 pref = (skb_array[x]->data);
 580                 prefetch(pref);
 581                 prefetch(pref + EHEA_CACHE_LINE);
 582                 prefetch(pref + EHEA_CACHE_LINE * 2);
 583                 prefetch(pref + EHEA_CACHE_LINE * 3);
 584         }
 585
 586         skb = skb_array[skb_index];
 587         skb_array[skb_index] = NULL;
 588         return skb;
 589 }
 590
 591 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 592                                                   int arr_len, int wqe_index)
 593 {
 594         struct sk_buff *skb;
 595         void *pref;
 596         int x;
 597
 598         x = wqe_index + 1;
 599         x &= (arr_len - 1);
 600
 601         pref = skb_array[x];
 602         if (pref) {
 603                 prefetchw(pref);
 604                 prefetchw(pref + EHEA_CACHE_LINE);
 605
 606                 pref = (skb_array[x]->data);
 607                 prefetchw(pref);
 608                 prefetchw(pref + EHEA_CACHE_LINE);
 609         }
 610
 611         skb = skb_array[wqe_index];
 612         skb_array[wqe_index] = NULL;
 613         return skb;
 614 }
 615
 616 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 617                                  struct ehea_cqe *cqe, int *processed_rq2,
 618                                  int *processed_rq3)
 619 {
 620         struct sk_buff *skb;
 621
 622         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 623                 pr->p_stats.err_tcp_cksum++;
 624         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 625                 pr->p_stats.err_ip_cksum++;
 626         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 627                 pr->p_stats.err_frame_crc++;
 628
 629         if (rq == 2) {
 630                 *processed_rq2 += 1;
 631                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 632                 dev_kfree_skb(skb);
 633         } else if (rq == 3) {
 634                 *processed_rq3 += 1;
 635                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 636                 dev_kfree_skb(skb);
 637         }
 638
 639         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 640                 if (netif_msg_rx_err(pr->port)) {
 641                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 642                                pr->qp->init_attr.qp_nr);
 643                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 644                 }
 645                 ehea_schedule_port_reset(pr->port);
 646                 return 1;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 653                        void **tcph, u64 *hdr_flags, void *priv)
 654 {
 655         struct ehea_cqe *cqe = priv;
 656         unsigned int ip_len;
 657         struct iphdr *iph;
 658
 659         /* non tcp/udp packets */
 660         if (!cqe->header_length)
 661                 return -1;
 662
 663         /* non tcp packet */
 664         skb_reset_network_header(skb);
 665         iph = ip_hdr(skb);
 666         if (iph->protocol != IPPROTO_TCP)
 667                 return -1;
 668
 669         ip_len = ip_hdrlen(skb);
 670         skb_set_transport_header(skb, ip_len);
 671         *tcph = tcp_hdr(skb);
 672
 673         /* check if ip header and tcp header are complete */
 674         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 675                 return -1;
 676
 677         *hdr_flags = LRO_IPV4 | LRO_TCP;
 678         *iphdr = iph;
 679
 680         return 0;
 681 }
 682
 683 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 684                           struct sk_buff *skb)
 685 {
 686         int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
 687                               pr->port->vgrp);
 688
 689         if (skb->dev->features & NETIF_F_LRO) {
 690                 if (vlan_extracted)
 691                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 692                                                      pr->port->vgrp,
 693                                                      cqe->vlan_tag,
 694                                                      cqe);
 695                 else
 696                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 697         } else {
 698                 if (vlan_extracted)
 699                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 700                                                  cqe->vlan_tag);
 701                 else
 702                         netif_receive_skb(skb);
 703         }
 704 }
 705
 706 static int ehea_proc_rwqes(struct net_device *dev,
 707                            struct ehea_port_res *pr,
 708                            int budget)
 709 {
 710         struct ehea_port *port = pr->port;
 711         struct ehea_qp *qp = pr->qp;
 712         struct ehea_cqe *cqe;
 713         struct sk_buff *skb;
 714         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 715         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 716         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 717         int skb_arr_rq1_len = pr->rq1_skba.len;
 718         int skb_arr_rq2_len = pr->rq2_skba.len;
 719         int skb_arr_rq3_len = pr->rq3_skba.len;
 720         int processed, processed_rq1, processed_rq2, processed_rq3;
 721         u64 processed_bytes = 0;
 722         int wqe_index, last_wqe_index, rq, port_reset;
 723
 724         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 725         last_wqe_index = 0;
 726
 727         cqe = ehea_poll_rq1(qp, &wqe_index);
 728         while ((processed < budget) && cqe) {
 729                 ehea_inc_rq1(qp);
 730                 processed_rq1++;
 731                 processed++;
 732                 if (netif_msg_rx_status(port))
 733                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 734
 735                 last_wqe_index = wqe_index;
 736                 rmb();
 737                 if (!ehea_check_cqe(cqe, &rq)) {
 738                         if (rq == 1) {
 739                                 /* LL RQ1 */
 740                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 741                                                           skb_arr_rq1_len,
 742                                                           wqe_index);
 743                                 if (unlikely(!skb)) {
 744                                         netif_info(port, rx_err, dev,
 745                                                   "LL rq1: skb=NULL\n");
 746
 747                                         skb = netdev_alloc_skb(dev,
 748                                                                EHEA_L_PKT_SIZE);
 749                                         if (!skb) {
 750                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 751                                                 break;
 752                                         }
 753                                 }
 754                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 755                                                  cqe->num_bytes_transfered - 4);
 756                                 ehea_fill_skb(dev, skb, cqe);
 757                         } else if (rq == 2) {
 758                                 /* RQ2 */
 759                                 skb = get_skb_by_index(skb_arr_rq2,
 760                                                        skb_arr_rq2_len, cqe);
 761                                 if (unlikely(!skb)) {
 762                                         netif_err(port, rx_err, dev,
 763                                                   "rq2: skb=NULL\n");
 764                                         break;
 765                                 }
 766                                 ehea_fill_skb(dev, skb, cqe);
 767                                 processed_rq2++;
 768                         } else {
 769                                 /* RQ3 */
 770                                 skb = get_skb_by_index(skb_arr_rq3,
 771                                                        skb_arr_rq3_len, cqe);
 772                                 if (unlikely(!skb)) {
 773                                         netif_err(port, rx_err, dev,
 774                                                   "rq3: skb=NULL\n");
 775                                         break;
 776                                 }
 777                                 ehea_fill_skb(dev, skb, cqe);
 778                                 processed_rq3++;
 779                         }
 780
 781                         processed_bytes += skb->len;
 782                         ehea_proc_skb(pr, cqe, skb);
 783                 } else {
 784                         pr->p_stats.poll_receive_errors++;
 785                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 786                                                            &processed_rq2,
 787                                                            &processed_rq3);
 788                         if (port_reset)
 789                                 break;
 790                 }
 791                 cqe = ehea_poll_rq1(qp, &wqe_index);
 792         }
 793         if (dev->features & NETIF_F_LRO)
 794                 lro_flush_all(&pr->lro_mgr);
 795
 796         pr->rx_packets += processed;
 797         pr->rx_bytes += processed_bytes;
 798
 799         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 800         ehea_refill_rq2(pr, processed_rq2);
 801         ehea_refill_rq3(pr, processed_rq3);
 802
 803         return processed;
 804 }
 805
 806 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 807
 808 static void reset_sq_restart_flag(struct ehea_port *port)
 809 {
 810         int i;
 811
 812         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 813                 struct ehea_port_res *pr = &port->port_res[i];
 814                 pr->sq_restart_flag = 0;
 815         }
 816         wake_up(&port->restart_wq);
 817 }
 818
 819 static void check_sqs(struct ehea_port *port)
 820 {
 821         struct ehea_swqe *swqe;
 822         int swqe_index;
 823         int i, k;
 824
 825         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 826                 struct ehea_port_res *pr = &port->port_res[i];
 827                 int ret;
 828                 k = 0;
 829                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 830                 memset(swqe, 0, SWQE_HEADER_SIZE);
 831                 atomic_dec(&pr->swqe_avail);
 832
 833                 swqe->tx_control |= EHEA_SWQE_PURGE;
 834                 swqe->wr_id = SWQE_RESTART_CHECK;
 835                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 836                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 837                 swqe->immediate_data_length = 80;
 838
 839                 ehea_post_swqe(pr->qp, swqe);
 840
 841                 ret = wait_event_timeout(port->restart_wq,
 842                                          pr->sq_restart_flag == 0,
 843                                          msecs_to_jiffies(100));
 844
 845                 if (!ret) {
 846                         pr_err("HW/SW queues out of sync\n");
 847                         ehea_schedule_port_reset(pr->port);
 848                         return;
 849                 }
 850         }
 851 }
 852
 853
 854 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 855 {
 856         struct sk_buff *skb;
 857         struct ehea_cq *send_cq = pr->send_cq;
 858         struct ehea_cqe *cqe;
 859         int quota = my_quota;
 860         int cqe_counter = 0;
 861         int swqe_av = 0;
 862         int index;
 863         unsigned long flags;
 864
 865         cqe = ehea_poll_cq(send_cq);
 866         while (cqe && (quota > 0)) {
 867                 ehea_inc_cq(send_cq);
 868
 869                 cqe_counter++;
 870                 rmb();
 871
 872                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 873                         pr->sq_restart_flag = 1;
 874                         swqe_av++;
 875                         break;
 876                 }
 877
 878                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 879                         pr_err("Bad send completion status=0x%04X\n",
 880                                cqe->status);
 881
 882                         if (netif_msg_tx_err(pr->port))
 883                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 884
 885                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 886                                 pr_err("Resetting port\n");
 887                                 ehea_schedule_port_reset(pr->port);
 888                                 break;
 889                         }
 890                 }
 891
 892                 if (netif_msg_tx_done(pr->port))
 893                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 894
 895                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 896                            == EHEA_SWQE2_TYPE)) {
 897
 898                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 899                         skb = pr->sq_skba.arr[index];
 900                         dev_kfree_skb(skb);
 901                         pr->sq_skba.arr[index] = NULL;
 902                 }
 903
 904                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 905                 quota--;
 906
 907                 cqe = ehea_poll_cq(send_cq);
 908         }
 909
 910         ehea_update_feca(send_cq, cqe_counter);
 911         atomic_add(swqe_av, &pr->swqe_avail);
 912
 913         spin_lock_irqsave(&pr->netif_queue, flags);
 914
 915         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 916                                   >= pr->swqe_refill_th)) {
 917                 netif_wake_queue(pr->port->netdev);
 918                 pr->queue_stopped = 0;
 919         }
 920         spin_unlock_irqrestore(&pr->netif_queue, flags);
 921         wake_up(&pr->port->swqe_avail_wq);
 922
 923         return cqe;
 924 }
 925
 926 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 927 #define EHEA_POLL_MAX_CQES 65535
 928
 929 static int ehea_poll(struct napi_struct *napi, int budget)
 930 {
 931         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 932                                                 napi);
 933         struct net_device *dev = pr->port->netdev;
 934         struct ehea_cqe *cqe;
 935         struct ehea_cqe *cqe_skb = NULL;
 936         int force_irq, wqe_index;
 937         int rx = 0;
 938
 939         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 940         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 941
 942         if (!force_irq)
 943                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 944
 945         while ((rx != budget) || force_irq) {
 946                 pr->poll_counter = 0;
 947                 force_irq = 0;
 948                 napi_complete(napi);
 949                 ehea_reset_cq_ep(pr->recv_cq);
 950                 ehea_reset_cq_ep(pr->send_cq);
 951                 ehea_reset_cq_n1(pr->recv_cq);
 952                 ehea_reset_cq_n1(pr->send_cq);
 953                 rmb();
 954                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 955                 cqe_skb = ehea_poll_cq(pr->send_cq);
 956
 957                 if (!cqe && !cqe_skb)
 958                         return rx;
 959
 960                 if (!napi_reschedule(napi))
 961                         return rx;
 962
 963                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 964                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 965         }
 966
 967         pr->poll_counter++;
 968         return rx;
 969 }
 970
 971 #ifdef CONFIG_NET_POLL_CONTROLLER
 972 static void ehea_netpoll(struct net_device *dev)
 973 {
 974         struct ehea_port *port = netdev_priv(dev);
 975         int i;
 976
 977         for (i = 0; i < port->num_def_qps; i++)
 978                 napi_schedule(&port->port_res[i].napi);
 979 }
 980 #endif
 981
 982 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 983 {
 984         struct ehea_port_res *pr = param;
 985
 986         napi_schedule(&pr->napi);
 987
 988         return IRQ_HANDLED;
 989 }
 990
 991 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 992 {
 993         struct ehea_port *port = param;
 994         struct ehea_eqe *eqe;
 995         struct ehea_qp *qp;
 996         u32 qp_token;
 997         u64 resource_type, aer, aerr;
 998         int reset_port = 0;
 999
1000         eqe = ehea_poll_eq(port->qp_eq);
1001
1002         while (eqe) {
1003                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1004                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1005                        eqe->entry, qp_token);
1006
1007                 qp = port->port_res[qp_token].qp;
1008
1009                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1010                                                 &aer, &aerr);
1011
1012                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1013                         if ((aer & EHEA_AER_RESET_MASK) ||
1014                             (aerr & EHEA_AERR_RESET_MASK))
1015                                  reset_port = 1;
1016                 } else
1017                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1018
1019                 eqe = ehea_poll_eq(port->qp_eq);
1020         }
1021
1022         if (reset_port) {
1023                 pr_err("Resetting port\n");
1024                 ehea_schedule_port_reset(port);
1025         }
1026
1027         return IRQ_HANDLED;
1028 }
1029
1030 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1031                                        int logical_port)
1032 {
1033         int i;
1034
1035         for (i = 0; i < EHEA_MAX_PORTS; i++)
1036                 if (adapter->port[i])
1037                         if (adapter->port[i]->logical_port_id == logical_port)
1038                                 return adapter->port[i];
1039         return NULL;
1040 }
1041
1042 int ehea_sense_port_attr(struct ehea_port *port)
1043 {
1044         int ret;
1045         u64 hret;
1046         struct hcp_ehea_port_cb0 *cb0;
1047
1048         /* may be called via ehea_neq_tasklet() */
1049         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1050         if (!cb0) {
1051                 pr_err("no mem for cb0\n");
1052                 ret = -ENOMEM;
1053                 goto out;
1054         }
1055
1056         hret = ehea_h_query_ehea_port(port->adapter->handle,
1057                                       port->logical_port_id, H_PORT_CB0,
1058                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1059                                       cb0);
1060         if (hret != H_SUCCESS) {
1061                 ret = -EIO;
1062                 goto out_free;
1063         }
1064
1065         /* MAC address */
1066         port->mac_addr = cb0->port_mac_addr << 16;
1067
1068         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1069                 ret = -EADDRNOTAVAIL;
1070                 goto out_free;
1071         }
1072
1073         /* Port speed */
1074         switch (cb0->port_speed) {
1075         case H_SPEED_10M_H:
1076                 port->port_speed = EHEA_SPEED_10M;
1077                 port->full_duplex = 0;
1078                 break;
1079         case H_SPEED_10M_F:
1080                 port->port_speed = EHEA_SPEED_10M;
1081                 port->full_duplex = 1;
1082                 break;
1083         case H_SPEED_100M_H:
1084                 port->port_speed = EHEA_SPEED_100M;
1085                 port->full_duplex = 0;
1086                 break;
1087         case H_SPEED_100M_F:
1088                 port->port_speed = EHEA_SPEED_100M;
1089                 port->full_duplex = 1;
1090                 break;
1091         case H_SPEED_1G_F:
1092                 port->port_speed = EHEA_SPEED_1G;
1093                 port->full_duplex = 1;
1094                 break;
1095         case H_SPEED_10G_F:
1096                 port->port_speed = EHEA_SPEED_10G;
1097                 port->full_duplex = 1;
1098                 break;
1099         default:
1100                 port->port_speed = 0;
1101                 port->full_duplex = 0;
1102                 break;
1103         }
1104
1105         port->autoneg = 1;
1106         port->num_mcs = cb0->num_default_qps;
1107
1108         /* Number of default QPs */
1109         if (use_mcs)
1110                 port->num_def_qps = cb0->num_default_qps;
1111         else
1112                 port->num_def_qps = 1;
1113
1114         if (!port->num_def_qps) {
1115                 ret = -EINVAL;
1116                 goto out_free;
1117         }
1118
1119         port->num_tx_qps = num_tx_qps;
1120
1121         if (port->num_def_qps >= port->num_tx_qps)
1122                 port->num_add_tx_qps = 0;
1123         else
1124                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1125
1126         ret = 0;
1127 out_free:
1128         if (ret || netif_msg_probe(port))
1129                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1130         free_page((unsigned long)cb0);
1131 out:
1132         return ret;
1133 }
1134
1135 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1136 {
1137         struct hcp_ehea_port_cb4 *cb4;
1138         u64 hret;
1139         int ret = 0;
1140
1141         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1142         if (!cb4) {
1143                 pr_err("no mem for cb4\n");
1144                 ret = -ENOMEM;
1145                 goto out;
1146         }
1147
1148         cb4->port_speed = port_speed;
1149
1150         netif_carrier_off(port->netdev);
1151
1152         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1153                                        port->logical_port_id,
1154                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1155         if (hret == H_SUCCESS) {
1156                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1157
1158                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1159                                               port->logical_port_id,
1160                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1161                                               cb4);
1162                 if (hret == H_SUCCESS) {
1163                         switch (cb4->port_speed) {
1164                         case H_SPEED_10M_H:
1165                                 port->port_speed = EHEA_SPEED_10M;
1166                                 port->full_duplex = 0;
1167                                 break;
1168                         case H_SPEED_10M_F:
1169                                 port->port_speed = EHEA_SPEED_10M;
1170                                 port->full_duplex = 1;
1171                                 break;
1172                         case H_SPEED_100M_H:
1173                                 port->port_speed = EHEA_SPEED_100M;
1174                                 port->full_duplex = 0;
1175                                 break;
1176                         case H_SPEED_100M_F:
1177                                 port->port_speed = EHEA_SPEED_100M;
1178                                 port->full_duplex = 1;
1179                                 break;
1180                         case H_SPEED_1G_F:
1181                                 port->port_speed = EHEA_SPEED_1G;
1182                                 port->full_duplex = 1;
1183                                 break;
1184                         case H_SPEED_10G_F:
1185                                 port->port_speed = EHEA_SPEED_10G;
1186                                 port->full_duplex = 1;
1187                                 break;
1188                         default:
1189                                 port->port_speed = 0;
1190                                 port->full_duplex = 0;
1191                                 break;
1192                         }
1193                 } else {
1194                         pr_err("Failed sensing port speed\n");
1195                         ret = -EIO;
1196                 }
1197         } else {
1198                 if (hret == H_AUTHORITY) {
1199                         pr_info("Hypervisor denied setting port speed\n");
1200                         ret = -EPERM;
1201                 } else {
1202                         ret = -EIO;
1203                         pr_err("Failed setting port speed\n");
1204                 }
1205         }
1206         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1207                 netif_carrier_on(port->netdev);
1208
1209         free_page((unsigned long)cb4);
1210 out:
1211         return ret;
1212 }
1213
1214 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1215 {
1216         int ret;
1217         u8 ec;
1218         u8 portnum;
1219         struct ehea_port *port;
1220         struct net_device *dev;
1221
1222         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1223         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1224         port = ehea_get_port(adapter, portnum);
1225         dev = port->netdev;
1226
1227         switch (ec) {
1228         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1229
1230                 if (!port) {
1231                         netdev_err(dev, "unknown portnum %x\n", portnum);
1232                         break;
1233                 }
1234
1235                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1236                         if (!netif_carrier_ok(dev)) {
1237                                 ret = ehea_sense_port_attr(port);
1238                                 if (ret) {
1239                                         netdev_err(dev, "failed resensing port attributes\n");
1240                                         break;
1241                                 }
1242
1243                                 netif_info(port, link, dev,
1244                                            "Logical port up: %dMbps %s Duplex\n",
1245                                            port->port_speed,
1246                                            port->full_duplex == 1 ?
1247                                            "Full" : "Half");
1248
1249                                 netif_carrier_on(dev);
1250                                 netif_wake_queue(dev);
1251                         }
1252                 } else
1253                         if (netif_carrier_ok(dev)) {
1254                                 netif_info(port, link, dev,
1255                                            "Logical port down\n");
1256                                 netif_carrier_off(dev);
1257                                 netif_stop_queue(dev);
1258                         }
1259
1260                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1261                         port->phy_link = EHEA_PHY_LINK_UP;
1262                         netif_info(port, link, dev,
1263                                    "Physical port up\n");
1264                         if (prop_carrier_state)
1265                                 netif_carrier_on(dev);
1266                 } else {
1267                         port->phy_link = EHEA_PHY_LINK_DOWN;
1268                         netif_info(port, link, dev,
1269                                    "Physical port down\n");
1270                         if (prop_carrier_state)
1271                                 netif_carrier_off(dev);
1272                 }
1273
1274                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1275                         netdev_info(dev,
1276                                     "External switch port is primary port\n");
1277                 else
1278                         netdev_info(dev,
1279                                     "External switch port is backup port\n");
1280
1281                 break;
1282         case EHEA_EC_ADAPTER_MALFUNC:
1283                 netdev_err(dev, "Adapter malfunction\n");
1284                 break;
1285         case EHEA_EC_PORT_MALFUNC:
1286                 netdev_info(dev, "Port malfunction\n");
1287                 netif_carrier_off(dev);
1288                 netif_stop_queue(dev);
1289                 break;
1290         default:
1291                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1292                 break;
1293         }
1294 }
1295
1296 static void ehea_neq_tasklet(unsigned long data)
1297 {
1298         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1299         struct ehea_eqe *eqe;
1300         u64 event_mask;
1301
1302         eqe = ehea_poll_eq(adapter->neq);
1303         pr_debug("eqe=%p\n", eqe);
1304
1305         while (eqe) {
1306                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1307                 ehea_parse_eqe(adapter, eqe->entry);
1308                 eqe = ehea_poll_eq(adapter->neq);
1309                 pr_debug("next eqe=%p\n", eqe);
1310         }
1311
1312         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1313                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1314                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1315
1316         ehea_h_reset_events(adapter->handle,
1317                             adapter->neq->fw_handle, event_mask);
1318 }
1319
1320 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1321 {
1322         struct ehea_adapter *adapter = param;
1323         tasklet_hi_schedule(&adapter->neq_tasklet);
1324         return IRQ_HANDLED;
1325 }
1326
1327
1328 static int ehea_fill_port_res(struct ehea_port_res *pr)
1329 {
1330         int ret;
1331         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1332
1333         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1334
1335         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1336
1337         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1338
1339         return ret;
1340 }
1341
1342 static int ehea_reg_interrupts(struct net_device *dev)
1343 {
1344         struct ehea_port *port = netdev_priv(dev);
1345         struct ehea_port_res *pr;
1346         int i, ret;
1347
1348
1349         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1350                  dev->name);
1351
1352         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1353                                   ehea_qp_aff_irq_handler,
1354                                   IRQF_DISABLED, port->int_aff_name, port);
1355         if (ret) {
1356                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1357                            port->qp_eq->attr.ist1);
1358                 goto out_free_qpeq;
1359         }
1360
1361         netif_info(port, ifup, dev,
1362                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1363                    port->qp_eq->attr.ist1);
1364
1365
1366         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1367                 pr = &port->port_res[i];
1368                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1369                          "%s-queue%d", dev->name, i);
1370                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1371                                           ehea_recv_irq_handler,
1372                                           IRQF_DISABLED, pr->int_send_name,
1373                                           pr);
1374                 if (ret) {
1375                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1376                                    i, pr->eq->attr.ist1);
1377                         goto out_free_req;
1378                 }
1379                 netif_info(port, ifup, dev,
1380                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1381                            pr->eq->attr.ist1, i);
1382         }
1383 out:
1384         return ret;
1385
1386
1387 out_free_req:
1388         while (--i >= 0) {
1389                 u32 ist = port->port_res[i].eq->attr.ist1;
1390                 ibmebus_free_irq(ist, &port->port_res[i]);
1391         }
1392
1393 out_free_qpeq:
1394         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1395         i = port->num_def_qps;
1396
1397         goto out;
1398
1399 }
1400
1401 static void ehea_free_interrupts(struct net_device *dev)
1402 {
1403         struct ehea_port *port = netdev_priv(dev);
1404         struct ehea_port_res *pr;
1405         int i;
1406
1407         /* send */
1408
1409         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1410                 pr = &port->port_res[i];
1411                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1412                 netif_info(port, intr, dev,
1413                            "free send irq for res %d with handle 0x%X\n",
1414                            i, pr->eq->attr.ist1);
1415         }
1416
1417         /* associated events */
1418         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1419         netif_info(port, intr, dev,
1420                    "associated event interrupt for handle 0x%X freed\n",
1421                    port->qp_eq->attr.ist1);
1422 }
1423
1424 static int ehea_configure_port(struct ehea_port *port)
1425 {
1426         int ret, i;
1427         u64 hret, mask;
1428         struct hcp_ehea_port_cb0 *cb0;
1429
1430         ret = -ENOMEM;
1431         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1432         if (!cb0)
1433                 goto out;
1434
1435         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1436                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1437                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1438                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1439                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1440                                       PXLY_RC_VLAN_FILTER)
1441                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1442
1443         for (i = 0; i < port->num_mcs; i++)
1444                 if (use_mcs)
1445                         cb0->default_qpn_arr[i] =
1446                                 port->port_res[i].qp->init_attr.qp_nr;
1447                 else
1448                         cb0->default_qpn_arr[i] =
1449                                 port->port_res[0].qp->init_attr.qp_nr;
1450
1451         if (netif_msg_ifup(port))
1452                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1453
1454         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1455              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1456
1457         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1458                                        port->logical_port_id,
1459                                        H_PORT_CB0, mask, cb0);
1460         ret = -EIO;
1461         if (hret != H_SUCCESS)
1462                 goto out_free;
1463
1464         ret = 0;
1465
1466 out_free:
1467         free_page((unsigned long)cb0);
1468 out:
1469         return ret;
1470 }
1471
1472 int ehea_gen_smrs(struct ehea_port_res *pr)
1473 {
1474         int ret;
1475         struct ehea_adapter *adapter = pr->port->adapter;
1476
1477         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1478         if (ret)
1479                 goto out;
1480
1481         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1482         if (ret)
1483                 goto out_free;
1484
1485         return 0;
1486
1487 out_free:
1488         ehea_rem_mr(&pr->send_mr);
1489 out:
1490         pr_err("Generating SMRS failed\n");
1491         return -EIO;
1492 }
1493
1494 int ehea_rem_smrs(struct ehea_port_res *pr)
1495 {
1496         if ((ehea_rem_mr(&pr->send_mr)) ||
1497             (ehea_rem_mr(&pr->recv_mr)))
1498                 return -EIO;
1499         else
1500                 return 0;
1501 }
1502
1503 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1504 {
1505         int arr_size = sizeof(void *) * max_q_entries;
1506
1507         q_skba->arr = vzalloc(arr_size);
1508         if (!q_skba->arr)
1509                 return -ENOMEM;
1510
1511         q_skba->len = max_q_entries;
1512         q_skba->index = 0;
1513         q_skba->os_skbs = 0;
1514
1515         return 0;
1516 }
1517
1518 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1519                               struct port_res_cfg *pr_cfg, int queue_token)
1520 {
1521         struct ehea_adapter *adapter = port->adapter;
1522         enum ehea_eq_type eq_type = EHEA_EQ;
1523         struct ehea_qp_init_attr *init_attr = NULL;
1524         int ret = -EIO;
1525         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1526
1527         tx_bytes = pr->tx_bytes;
1528         tx_packets = pr->tx_packets;
1529         rx_bytes = pr->rx_bytes;
1530         rx_packets = pr->rx_packets;
1531
1532         memset(pr, 0, sizeof(struct ehea_port_res));
1533
1534         pr->tx_bytes = rx_bytes;
1535         pr->tx_packets = tx_packets;
1536         pr->rx_bytes = rx_bytes;
1537         pr->rx_packets = rx_packets;
1538
1539         pr->port = port;
1540         spin_lock_init(&pr->xmit_lock);
1541         spin_lock_init(&pr->netif_queue);
1542
1543         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1544         if (!pr->eq) {
1545                 pr_err("create_eq failed (eq)\n");
1546                 goto out_free;
1547         }
1548
1549         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1550                                      pr->eq->fw_handle,
1551                                      port->logical_port_id);
1552         if (!pr->recv_cq) {
1553                 pr_err("create_cq failed (cq_recv)\n");
1554                 goto out_free;
1555         }
1556
1557         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1558                                      pr->eq->fw_handle,
1559                                      port->logical_port_id);
1560         if (!pr->send_cq) {
1561                 pr_err("create_cq failed (cq_send)\n");
1562                 goto out_free;
1563         }
1564
1565         if (netif_msg_ifup(port))
1566                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1567                         pr->send_cq->attr.act_nr_of_cqes,
1568                         pr->recv_cq->attr.act_nr_of_cqes);
1569
1570         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1571         if (!init_attr) {
1572                 ret = -ENOMEM;
1573                 pr_err("no mem for ehea_qp_init_attr\n");
1574                 goto out_free;
1575         }
1576
1577         init_attr->low_lat_rq1 = 1;
1578         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1579         init_attr->rq_count = 3;
1580         init_attr->qp_token = queue_token;
1581         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1582         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1583         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1584         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1585         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1586         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1587         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1588         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1589         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1590         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1591         init_attr->port_nr = port->logical_port_id;
1592         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1593         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1594         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1595
1596         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1597         if (!pr->qp) {
1598                 pr_err("create_qp failed\n");
1599                 ret = -EIO;
1600                 goto out_free;
1601         }
1602
1603         if (netif_msg_ifup(port))
1604                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1605                         init_attr->qp_nr,
1606                         init_attr->act_nr_send_wqes,
1607                         init_attr->act_nr_rwqes_rq1,
1608                         init_attr->act_nr_rwqes_rq2,
1609                         init_attr->act_nr_rwqes_rq3);
1610
1611         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1612
1613         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1614         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1615         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1616         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1617         if (ret)
1618                 goto out_free;
1619
1620         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1621         if (ehea_gen_smrs(pr) != 0) {
1622                 ret = -EIO;
1623                 goto out_free;
1624         }
1625
1626         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1627
1628         kfree(init_attr);
1629
1630         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1631
1632         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1633         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1634         pr->lro_mgr.lro_arr = pr->lro_desc;
1635         pr->lro_mgr.get_skb_header = get_skb_hdr;
1636         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1637         pr->lro_mgr.dev = port->netdev;
1638         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1639         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1640
1641         ret = 0;
1642         goto out;
1643
1644 out_free:
1645         kfree(init_attr);
1646         vfree(pr->sq_skba.arr);
1647         vfree(pr->rq1_skba.arr);
1648         vfree(pr->rq2_skba.arr);
1649         vfree(pr->rq3_skba.arr);
1650         ehea_destroy_qp(pr->qp);
1651         ehea_destroy_cq(pr->send_cq);
1652         ehea_destroy_cq(pr->recv_cq);
1653         ehea_destroy_eq(pr->eq);
1654 out:
1655         return ret;
1656 }
1657
1658 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1659 {
1660         int ret, i;
1661
1662         if (pr->qp)
1663                 netif_napi_del(&pr->napi);
1664
1665         ret = ehea_destroy_qp(pr->qp);
1666
1667         if (!ret) {
1668                 ehea_destroy_cq(pr->send_cq);
1669                 ehea_destroy_cq(pr->recv_cq);
1670                 ehea_destroy_eq(pr->eq);
1671
1672                 for (i = 0; i < pr->rq1_skba.len; i++)
1673                         if (pr->rq1_skba.arr[i])
1674                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1675
1676                 for (i = 0; i < pr->rq2_skba.len; i++)
1677                         if (pr->rq2_skba.arr[i])
1678                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1679
1680                 for (i = 0; i < pr->rq3_skba.len; i++)
1681                         if (pr->rq3_skba.arr[i])
1682                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1683
1684                 for (i = 0; i < pr->sq_skba.len; i++)
1685                         if (pr->sq_skba.arr[i])
1686                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1687
1688                 vfree(pr->rq1_skba.arr);
1689                 vfree(pr->rq2_skba.arr);
1690                 vfree(pr->rq3_skba.arr);
1691                 vfree(pr->sq_skba.arr);
1692                 ret = ehea_rem_smrs(pr);
1693         }
1694         return ret;
1695 }
1696
1697 /*
1698  * The write_* functions store information in swqe which is used by
1699  * the hardware to calculate the ip/tcp/udp checksum
1700  */
1701
1702 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1703                                       const struct sk_buff *skb)
1704 {
1705         swqe->ip_start = skb_network_offset(skb);
1706         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1707 }
1708
1709 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1710                                         const struct sk_buff *skb)
1711 {
1712         swqe->tcp_offset =
1713                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1714
1715         swqe->tcp_end = (u16)skb->len - 1;
1716 }
1717
1718 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1719                                         const struct sk_buff *skb)
1720 {
1721         swqe->tcp_offset =
1722                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1723
1724         swqe->tcp_end = (u16)skb->len - 1;
1725 }
1726
1727
1728 static void write_swqe2_TSO(struct sk_buff *skb,
1729                             struct ehea_swqe *swqe, u32 lkey)
1730 {
1731         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1732         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1733         int skb_data_size = skb_headlen(skb);
1734         int headersize;
1735
1736         /* Packet is TCP with TSO enabled */
1737         swqe->tx_control |= EHEA_SWQE_TSO;
1738         swqe->mss = skb_shinfo(skb)->gso_size;
1739         /* copy only eth/ip/tcp headers to immediate data and
1740          * the rest of skb->data to sg1entry
1741          */
1742         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1743
1744         skb_data_size = skb_headlen(skb);
1745
1746         if (skb_data_size >= headersize) {
1747                 /* copy immediate data */
1748                 skb_copy_from_linear_data(skb, imm_data, headersize);
1749                 swqe->immediate_data_length = headersize;
1750
1751                 if (skb_data_size > headersize) {
1752                         /* set sg1entry data */
1753                         sg1entry->l_key = lkey;
1754                         sg1entry->len = skb_data_size - headersize;
1755                         sg1entry->vaddr =
1756                                 ehea_map_vaddr(skb->data + headersize);
1757                         swqe->descriptors++;
1758                 }
1759         } else
1760                 pr_err("cannot handle fragmented headers\n");
1761 }
1762
1763 static void write_swqe2_nonTSO(struct sk_buff *skb,
1764                                struct ehea_swqe *swqe, u32 lkey)
1765 {
1766         int skb_data_size = skb_headlen(skb);
1767         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1768         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1769
1770         /* Packet is any nonTSO type
1771          *
1772          * Copy as much as possible skb->data to immediate data and
1773          * the rest to sg1entry
1774          */
1775         if (skb_data_size >= SWQE2_MAX_IMM) {
1776                 /* copy immediate data */
1777                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1778
1779                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1780
1781                 if (skb_data_size > SWQE2_MAX_IMM) {
1782                         /* copy sg1entry data */
1783                         sg1entry->l_key = lkey;
1784                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1785                         sg1entry->vaddr =
1786                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1787                         swqe->descriptors++;
1788                 }
1789         } else {
1790                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1791                 swqe->immediate_data_length = skb_data_size;
1792         }
1793 }
1794
1795 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1796                                     struct ehea_swqe *swqe, u32 lkey)
1797 {
1798         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1799         skb_frag_t *frag;
1800         int nfrags, sg1entry_contains_frag_data, i;
1801
1802         nfrags = skb_shinfo(skb)->nr_frags;
1803         sg1entry = &swqe->u.immdata_desc.sg_entry;
1804         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1805         swqe->descriptors = 0;
1806         sg1entry_contains_frag_data = 0;
1807
1808         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1809                 write_swqe2_TSO(skb, swqe, lkey);
1810         else
1811                 write_swqe2_nonTSO(skb, swqe, lkey);
1812
1813         /* write descriptors */
1814         if (nfrags > 0) {
1815                 if (swqe->descriptors == 0) {
1816                         /* sg1entry not yet used */
1817                         frag = &skb_shinfo(skb)->frags[0];
1818
1819                         /* copy sg1entry data */
1820                         sg1entry->l_key = lkey;
1821                         sg1entry->len = frag->size;
1822                         sg1entry->vaddr =
1823                                 ehea_map_vaddr(page_address(frag->page)
1824                                                + frag->page_offset);
1825                         swqe->descriptors++;
1826                         sg1entry_contains_frag_data = 1;
1827                 }
1828
1829                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1830
1831                         frag = &skb_shinfo(skb)->frags[i];
1832                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1833
1834                         sgentry->l_key = lkey;
1835                         sgentry->len = frag->size;
1836                         sgentry->vaddr =
1837                                 ehea_map_vaddr(page_address(frag->page)
1838                                                + frag->page_offset);
1839                         swqe->descriptors++;
1840                 }
1841         }
1842 }
1843
1844 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1845 {
1846         int ret = 0;
1847         u64 hret;
1848         u8 reg_type;
1849
1850         /* De/Register untagged packets */
1851         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1852         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853                                      port->logical_port_id,
1854                                      reg_type, port->mac_addr, 0, hcallid);
1855         if (hret != H_SUCCESS) {
1856                 pr_err("%sregistering bc address failed (tagged)\n",
1857                        hcallid == H_REG_BCMC ? "" : "de");
1858                 ret = -EIO;
1859                 goto out_herr;
1860         }
1861
1862         /* De/Register VLAN packets */
1863         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1864         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1865                                      port->logical_port_id,
1866                                      reg_type, port->mac_addr, 0, hcallid);
1867         if (hret != H_SUCCESS) {
1868                 pr_err("%sregistering bc address failed (vlan)\n",
1869                        hcallid == H_REG_BCMC ? "" : "de");
1870                 ret = -EIO;
1871         }
1872 out_herr:
1873         return ret;
1874 }
1875
1876 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1877 {
1878         struct ehea_port *port = netdev_priv(dev);
1879         struct sockaddr *mac_addr = sa;
1880         struct hcp_ehea_port_cb0 *cb0;
1881         int ret;
1882         u64 hret;
1883
1884         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1885                 ret = -EADDRNOTAVAIL;
1886                 goto out;
1887         }
1888
1889         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1890         if (!cb0) {
1891                 pr_err("no mem for cb0\n");
1892                 ret = -ENOMEM;
1893                 goto out;
1894         }
1895
1896         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1897
1898         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1899
1900         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1901                                        port->logical_port_id, H_PORT_CB0,
1902                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1903         if (hret != H_SUCCESS) {
1904                 ret = -EIO;
1905                 goto out_free;
1906         }
1907
1908         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1909
1910         /* Deregister old MAC in pHYP */
1911         if (port->state == EHEA_PORT_UP) {
1912                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1913                 if (ret)
1914                         goto out_upregs;
1915         }
1916
1917         port->mac_addr = cb0->port_mac_addr << 16;
1918
1919         /* Register new MAC in pHYP */
1920         if (port->state == EHEA_PORT_UP) {
1921                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1922                 if (ret)
1923                         goto out_upregs;
1924         }
1925
1926         ret = 0;
1927
1928 out_upregs:
1929         ehea_update_bcmc_registrations();
1930 out_free:
1931         free_page((unsigned long)cb0);
1932 out:
1933         return ret;
1934 }
1935
1936 static void ehea_promiscuous_error(u64 hret, int enable)
1937 {
1938         if (hret == H_AUTHORITY)
1939                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1940                         enable == 1 ? "en" : "dis");
1941         else
1942                 pr_err("failed %sabling promiscuous mode\n",
1943                        enable == 1 ? "en" : "dis");
1944 }
1945
1946 static void ehea_promiscuous(struct net_device *dev, int enable)
1947 {
1948         struct ehea_port *port = netdev_priv(dev);
1949         struct hcp_ehea_port_cb7 *cb7;
1950         u64 hret;
1951
1952         if (enable == port->promisc)
1953                 return;
1954
1955         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1956         if (!cb7) {
1957                 pr_err("no mem for cb7\n");
1958                 goto out;
1959         }
1960
1961         /* Modify Pxs_DUCQPN in CB7 */
1962         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1963
1964         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1965                                        port->logical_port_id,
1966                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1967         if (hret) {
1968                 ehea_promiscuous_error(hret, enable);
1969                 goto out;
1970         }
1971
1972         port->promisc = enable;
1973 out:
1974         free_page((unsigned long)cb7);
1975 }
1976
1977 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1978                                      u32 hcallid)
1979 {
1980         u64 hret;
1981         u8 reg_type;
1982
1983         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1984                  | EHEA_BCMC_UNTAGGED;
1985
1986         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1987                                      port->logical_port_id,
1988                                      reg_type, mc_mac_addr, 0, hcallid);
1989         if (hret)
1990                 goto out;
1991
1992         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1993                  | EHEA_BCMC_VLANID_ALL;
1994
1995         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1996                                      port->logical_port_id,
1997                                      reg_type, mc_mac_addr, 0, hcallid);
1998 out:
1999         return hret;
2000 }
2001
2002 static int ehea_drop_multicast_list(struct net_device *dev)
2003 {
2004         struct ehea_port *port = netdev_priv(dev);
2005         struct ehea_mc_list *mc_entry = port->mc_list;
2006         struct list_head *pos;
2007         struct list_head *temp;
2008         int ret = 0;
2009         u64 hret;
2010
2011         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2012                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2013
2014                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2015                                                  H_DEREG_BCMC);
2016                 if (hret) {
2017                         pr_err("failed deregistering mcast MAC\n");
2018                         ret = -EIO;
2019                 }
2020
2021                 list_del(pos);
2022                 kfree(mc_entry);
2023         }
2024         return ret;
2025 }
2026
2027 static void ehea_allmulti(struct net_device *dev, int enable)
2028 {
2029         struct ehea_port *port = netdev_priv(dev);
2030         u64 hret;
2031
2032         if (!port->allmulti) {
2033                 if (enable) {
2034                         /* Enable ALLMULTI */
2035                         ehea_drop_multicast_list(dev);
2036                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2037                         if (!hret)
2038                                 port->allmulti = 1;
2039                         else
2040                                 netdev_err(dev,
2041                                            "failed enabling IFF_ALLMULTI\n");
2042                 }
2043         } else
2044                 if (!enable) {
2045                         /* Disable ALLMULTI */
2046                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2047                         if (!hret)
2048                                 port->allmulti = 0;
2049                         else
2050                                 netdev_err(dev,
2051                                            "failed disabling IFF_ALLMULTI\n");
2052                 }
2053 }
2054
2055 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2056 {
2057         struct ehea_mc_list *ehea_mcl_entry;
2058         u64 hret;
2059
2060         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2061         if (!ehea_mcl_entry) {
2062                 pr_err("no mem for mcl_entry\n");
2063                 return;
2064         }
2065
2066         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2067
2068         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2069
2070         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2071                                          H_REG_BCMC);
2072         if (!hret)
2073                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2074         else {
2075                 pr_err("failed registering mcast MAC\n");
2076                 kfree(ehea_mcl_entry);
2077         }
2078 }
2079
2080 static void ehea_set_multicast_list(struct net_device *dev)
2081 {
2082         struct ehea_port *port = netdev_priv(dev);
2083         struct netdev_hw_addr *ha;
2084         int ret;
2085
2086         if (port->promisc) {
2087                 ehea_promiscuous(dev, 1);
2088                 return;
2089         }
2090         ehea_promiscuous(dev, 0);
2091
2092         if (dev->flags & IFF_ALLMULTI) {
2093                 ehea_allmulti(dev, 1);
2094                 goto out;
2095         }
2096         ehea_allmulti(dev, 0);
2097
2098         if (!netdev_mc_empty(dev)) {
2099                 ret = ehea_drop_multicast_list(dev);
2100                 if (ret) {
2101                         /* Dropping the current multicast list failed.
2102                          * Enabling ALL_MULTI is the best we can do.
2103                          */
2104                         ehea_allmulti(dev, 1);
2105                 }
2106
2107                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2108                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2109                                 port->adapter->max_mc_mac);
2110                         goto out;
2111                 }
2112
2113                 netdev_for_each_mc_addr(ha, dev)
2114                         ehea_add_multicast_entry(port, ha->addr);
2115
2116         }
2117 out:
2118         ehea_update_bcmc_registrations();
2119 }
2120
2121 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2122 {
2123         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2124                 return -EINVAL;
2125         dev->mtu = new_mtu;
2126         return 0;
2127 }
2128
2129 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2130                        struct ehea_swqe *swqe, u32 lkey)
2131 {
2132         if (skb->protocol == htons(ETH_P_IP)) {
2133                 const struct iphdr *iph = ip_hdr(skb);
2134
2135                 /* IPv4 */
2136                 swqe->tx_control |= EHEA_SWQE_CRC
2137                                  | EHEA_SWQE_IP_CHECKSUM
2138                                  | EHEA_SWQE_TCP_CHECKSUM
2139                                  | EHEA_SWQE_IMM_DATA_PRESENT
2140                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2141
2142                 write_ip_start_end(swqe, skb);
2143
2144                 if (iph->protocol == IPPROTO_UDP) {
2145                         if ((iph->frag_off & IP_MF) ||
2146                             (iph->frag_off & IP_OFFSET))
2147                                 /* IP fragment, so don't change cs */
2148                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2149                         else
2150                                 write_udp_offset_end(swqe, skb);
2151                 } else if (iph->protocol == IPPROTO_TCP) {
2152                         write_tcp_offset_end(swqe, skb);
2153                 }
2154
2155                 /* icmp (big data) and ip segmentation packets (all other ip
2156                    packets) do not require any special handling */
2157
2158         } else {
2159                 /* Other Ethernet Protocol */
2160                 swqe->tx_control |= EHEA_SWQE_CRC
2161                                  | EHEA_SWQE_IMM_DATA_PRESENT
2162                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2163         }
2164
2165         write_swqe2_data(skb, dev, swqe, lkey);
2166 }
2167
2168 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2169                        struct ehea_swqe *swqe)
2170 {
2171         int nfrags = skb_shinfo(skb)->nr_frags;
2172         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2173         skb_frag_t *frag;
2174         int i;
2175
2176         if (skb->protocol == htons(ETH_P_IP)) {
2177                 const struct iphdr *iph = ip_hdr(skb);
2178
2179                 /* IPv4 */
2180                 write_ip_start_end(swqe, skb);
2181
2182                 if (iph->protocol == IPPROTO_TCP) {
2183                         swqe->tx_control |= EHEA_SWQE_CRC
2184                                          | EHEA_SWQE_IP_CHECKSUM
2185                                          | EHEA_SWQE_TCP_CHECKSUM
2186                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2187
2188                         write_tcp_offset_end(swqe, skb);
2189
2190                 } else if (iph->protocol == IPPROTO_UDP) {
2191                         if ((iph->frag_off & IP_MF) ||
2192                             (iph->frag_off & IP_OFFSET))
2193                                 /* IP fragment, so don't change cs */
2194                                 swqe->tx_control |= EHEA_SWQE_CRC
2195                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2196                         else {
2197                                 swqe->tx_control |= EHEA_SWQE_CRC
2198                                                  | EHEA_SWQE_IP_CHECKSUM
2199                                                  | EHEA_SWQE_TCP_CHECKSUM
2200                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2201
2202                                 write_udp_offset_end(swqe, skb);
2203                         }
2204                 } else {
2205                         /* icmp (big data) and
2206                            ip segmentation packets (all other ip packets) */
2207                         swqe->tx_control |= EHEA_SWQE_CRC
2208                                          | EHEA_SWQE_IP_CHECKSUM
2209                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2210                 }
2211         } else {
2212                 /* Other Ethernet Protocol */
2213                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2214         }
2215         /* copy (immediate) data */
2216         if (nfrags == 0) {
2217                 /* data is in a single piece */
2218                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2219         } else {
2220                 /* first copy data from the skb->data buffer ... */
2221                 skb_copy_from_linear_data(skb, imm_data,
2222                                           skb_headlen(skb));
2223                 imm_data += skb_headlen(skb);
2224
2225                 /* ... then copy data from the fragments */
2226                 for (i = 0; i < nfrags; i++) {
2227                         frag = &skb_shinfo(skb)->frags[i];
2228                         memcpy(imm_data,
2229                                page_address(frag->page) + frag->page_offset,
2230                                frag->size);
2231                         imm_data += frag->size;
2232                 }
2233         }
2234         swqe->immediate_data_length = skb->len;
2235         dev_kfree_skb(skb);
2236 }
2237
2238 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2239 {
2240         struct tcphdr *tcp;
2241         u32 tmp;
2242
2243         if ((skb->protocol == htons(ETH_P_IP)) &&
2244             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2245                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2246                                         (ip_hdr(skb)->ihl * 4));
2247                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2248                 tmp += ip_hdr(skb)->daddr % 31;
2249                 return tmp % num_qps;
2250         } else
2251                 return 0;
2252 }
2253
2254 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2255 {
2256         struct ehea_port *port = netdev_priv(dev);
2257         struct ehea_swqe *swqe;
2258         unsigned long flags;
2259         u32 lkey;
2260         int swqe_index;
2261         struct ehea_port_res *pr;
2262
2263         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2264
2265         if (!spin_trylock(&pr->xmit_lock))
2266                 return NETDEV_TX_BUSY;
2267
2268         if (pr->queue_stopped) {
2269                 spin_unlock(&pr->xmit_lock);
2270                 return NETDEV_TX_BUSY;
2271         }
2272
2273         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2274         memset(swqe, 0, SWQE_HEADER_SIZE);
2275         atomic_dec(&pr->swqe_avail);
2276
2277         if (vlan_tx_tag_present(skb)) {
2278                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2279                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2280         }
2281
2282         pr->tx_packets++;
2283         pr->tx_bytes += skb->len;
2284
2285         if (skb->len <= SWQE3_MAX_IMM) {
2286                 u32 sig_iv = port->sig_comp_iv;
2287                 u32 swqe_num = pr->swqe_id_counter;
2288                 ehea_xmit3(skb, dev, swqe);
2289                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2290                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2291                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2292                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2293                                                       sig_iv);
2294                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2295                         pr->swqe_ll_count = 0;
2296                 } else
2297                         pr->swqe_ll_count += 1;
2298         } else {
2299                 swqe->wr_id =
2300                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2301                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2302                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2303                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2304                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2305
2306                 pr->sq_skba.index++;
2307                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2308
2309                 lkey = pr->send_mr.lkey;
2310                 ehea_xmit2(skb, dev, swqe, lkey);
2311                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2312         }
2313         pr->swqe_id_counter += 1;
2314
2315         netif_info(port, tx_queued, dev,
2316                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2317         if (netif_msg_tx_queued(port))
2318                 ehea_dump(swqe, 512, "swqe");
2319
2320         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2321                 netif_stop_queue(dev);
2322                 swqe->tx_control |= EHEA_SWQE_PURGE;
2323         }
2324
2325         ehea_post_swqe(pr->qp, swqe);
2326
2327         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2328                 spin_lock_irqsave(&pr->netif_queue, flags);
2329                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2330                         pr->p_stats.queue_stopped++;
2331                         netif_stop_queue(dev);
2332                         pr->queue_stopped = 1;
2333                 }
2334                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2335         }
2336         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2337         spin_unlock(&pr->xmit_lock);
2338
2339         return NETDEV_TX_OK;
2340 }
2341
2342 static void ehea_vlan_rx_register(struct net_device *dev,
2343                                   struct vlan_group *grp)
2344 {
2345         struct ehea_port *port = netdev_priv(dev);
2346         struct ehea_adapter *adapter = port->adapter;
2347         struct hcp_ehea_port_cb1 *cb1;
2348         u64 hret;
2349
2350         port->vgrp = grp;
2351
2352         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2353         if (!cb1) {
2354                 pr_err("no mem for cb1\n");
2355                 goto out;
2356         }
2357
2358         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2359                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2360         if (hret != H_SUCCESS)
2361                 pr_err("modify_ehea_port failed\n");
2362
2363         free_page((unsigned long)cb1);
2364 out:
2365         return;
2366 }
2367
2368 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2369 {
2370         struct ehea_port *port = netdev_priv(dev);
2371         struct ehea_adapter *adapter = port->adapter;
2372         struct hcp_ehea_port_cb1 *cb1;
2373         int index;
2374         u64 hret;
2375
2376         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2377         if (!cb1) {
2378                 pr_err("no mem for cb1\n");
2379                 goto out;
2380         }
2381
2382         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2383                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2384         if (hret != H_SUCCESS) {
2385                 pr_err("query_ehea_port failed\n");
2386                 goto out;
2387         }
2388
2389         index = (vid / 64);
2390         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2391
2392         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2393                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2394         if (hret != H_SUCCESS)
2395                 pr_err("modify_ehea_port failed\n");
2396 out:
2397         free_page((unsigned long)cb1);
2398         return;
2399 }
2400
2401 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2402 {
2403         struct ehea_port *port = netdev_priv(dev);
2404         struct ehea_adapter *adapter = port->adapter;
2405         struct hcp_ehea_port_cb1 *cb1;
2406         int index;
2407         u64 hret;
2408
2409         vlan_group_set_device(port->vgrp, vid, NULL);
2410
2411         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2412         if (!cb1) {
2413                 pr_err("no mem for cb1\n");
2414                 goto out;
2415         }
2416
2417         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2418                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2419         if (hret != H_SUCCESS) {
2420                 pr_err("query_ehea_port failed\n");
2421                 goto out;
2422         }
2423
2424         index = (vid / 64);
2425         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2426
2427         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2428                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2429         if (hret != H_SUCCESS)
2430                 pr_err("modify_ehea_port failed\n");
2431 out:
2432         free_page((unsigned long)cb1);
2433 }
2434
2435 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2436 {
2437         int ret = -EIO;
2438         u64 hret;
2439         u16 dummy16 = 0;
2440         u64 dummy64 = 0;
2441         struct hcp_modify_qp_cb0 *cb0;
2442
2443         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2444         if (!cb0) {
2445                 ret = -ENOMEM;
2446                 goto out;
2447         }
2448
2449         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2450                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2451         if (hret != H_SUCCESS) {
2452                 pr_err("query_ehea_qp failed (1)\n");
2453                 goto out;
2454         }
2455
2456         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2457         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2458                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2459                                      &dummy64, &dummy64, &dummy16, &dummy16);
2460         if (hret != H_SUCCESS) {
2461                 pr_err("modify_ehea_qp failed (1)\n");
2462                 goto out;
2463         }
2464
2465         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2466                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2467         if (hret != H_SUCCESS) {
2468                 pr_err("query_ehea_qp failed (2)\n");
2469                 goto out;
2470         }
2471
2472         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2473         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2474                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2475                                      &dummy64, &dummy64, &dummy16, &dummy16);
2476         if (hret != H_SUCCESS) {
2477                 pr_err("modify_ehea_qp failed (2)\n");
2478                 goto out;
2479         }
2480
2481         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2482                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2483         if (hret != H_SUCCESS) {
2484                 pr_err("query_ehea_qp failed (3)\n");
2485                 goto out;
2486         }
2487
2488         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2489         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2490                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2491                                      &dummy64, &dummy64, &dummy16, &dummy16);
2492         if (hret != H_SUCCESS) {
2493                 pr_err("modify_ehea_qp failed (3)\n");
2494                 goto out;
2495         }
2496
2497         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2498                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2499         if (hret != H_SUCCESS) {
2500                 pr_err("query_ehea_qp failed (4)\n");
2501                 goto out;
2502         }
2503
2504         ret = 0;
2505 out:
2506         free_page((unsigned long)cb0);
2507         return ret;
2508 }
2509
2510 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2511                                int add_tx_qps)
2512 {
2513         int ret, i;
2514         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2515         enum ehea_eq_type eq_type = EHEA_EQ;
2516
2517         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2518                                    EHEA_MAX_ENTRIES_EQ, 1);
2519         if (!port->qp_eq) {
2520                 ret = -EINVAL;
2521                 pr_err("ehea_create_eq failed (qp_eq)\n");
2522                 goto out_kill_eq;
2523         }
2524
2525         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2526         pr_cfg.max_entries_scq = sq_entries * 2;
2527         pr_cfg.max_entries_sq = sq_entries;
2528         pr_cfg.max_entries_rq1 = rq1_entries;
2529         pr_cfg.max_entries_rq2 = rq2_entries;
2530         pr_cfg.max_entries_rq3 = rq3_entries;
2531
2532         pr_cfg_small_rx.max_entries_rcq = 1;
2533         pr_cfg_small_rx.max_entries_scq = sq_entries;
2534         pr_cfg_small_rx.max_entries_sq = sq_entries;
2535         pr_cfg_small_rx.max_entries_rq1 = 1;
2536         pr_cfg_small_rx.max_entries_rq2 = 1;
2537         pr_cfg_small_rx.max_entries_rq3 = 1;
2538
2539         for (i = 0; i < def_qps; i++) {
2540                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2541                 if (ret)
2542                         goto out_clean_pr;
2543         }
2544         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2545                 ret = ehea_init_port_res(port, &port->port_res[i],
2546                                          &pr_cfg_small_rx, i);
2547                 if (ret)
2548                         goto out_clean_pr;
2549         }
2550
2551         return 0;
2552
2553 out_clean_pr:
2554         while (--i >= 0)
2555                 ehea_clean_portres(port, &port->port_res[i]);
2556
2557 out_kill_eq:
2558         ehea_destroy_eq(port->qp_eq);
2559         return ret;
2560 }
2561
2562 static int ehea_clean_all_portres(struct ehea_port *port)
2563 {
2564         int ret = 0;
2565         int i;
2566
2567         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2568                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2569
2570         ret |= ehea_destroy_eq(port->qp_eq);
2571
2572         return ret;
2573 }
2574
2575 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2576 {
2577         if (adapter->active_ports)
2578                 return;
2579
2580         ehea_rem_mr(&adapter->mr);
2581 }
2582
2583 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2584 {
2585         if (adapter->active_ports)
2586                 return 0;
2587
2588         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2589 }
2590
2591 static int ehea_up(struct net_device *dev)
2592 {
2593         int ret, i;
2594         struct ehea_port *port = netdev_priv(dev);
2595
2596         if (port->state == EHEA_PORT_UP)
2597                 return 0;
2598
2599         ret = ehea_port_res_setup(port, port->num_def_qps,
2600                                   port->num_add_tx_qps);
2601         if (ret) {
2602                 netdev_err(dev, "port_res_failed\n");
2603                 goto out;
2604         }
2605
2606         /* Set default QP for this port */
2607         ret = ehea_configure_port(port);
2608         if (ret) {
2609                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2610                 goto out_clean_pr;
2611         }
2612
2613         ret = ehea_reg_interrupts(dev);
2614         if (ret) {
2615                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2616                 goto out_clean_pr;
2617         }
2618
2619         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2620                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2621                 if (ret) {
2622                         netdev_err(dev, "activate_qp failed\n");
2623                         goto out_free_irqs;
2624                 }
2625         }
2626
2627         for (i = 0; i < port->num_def_qps; i++) {
2628                 ret = ehea_fill_port_res(&port->port_res[i]);
2629                 if (ret) {
2630                         netdev_err(dev, "out_free_irqs\n");
2631                         goto out_free_irqs;
2632                 }
2633         }
2634
2635         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2636         if (ret) {
2637                 ret = -EIO;
2638                 goto out_free_irqs;
2639         }
2640
2641         port->state = EHEA_PORT_UP;
2642
2643         ret = 0;
2644         goto out;
2645
2646 out_free_irqs:
2647         ehea_free_interrupts(dev);
2648
2649 out_clean_pr:
2650         ehea_clean_all_portres(port);
2651 out:
2652         if (ret)
2653                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2654
2655         ehea_update_bcmc_registrations();
2656         ehea_update_firmware_handles();
2657
2658         return ret;
2659 }
2660
2661 static void port_napi_disable(struct ehea_port *port)
2662 {
2663         int i;
2664
2665         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2666                 napi_disable(&port->port_res[i].napi);
2667 }
2668
2669 static void port_napi_enable(struct ehea_port *port)
2670 {
2671         int i;
2672
2673         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2674                 napi_enable(&port->port_res[i].napi);
2675 }
2676
2677 static int ehea_open(struct net_device *dev)
2678 {
2679         int ret;
2680         struct ehea_port *port = netdev_priv(dev);
2681
2682         mutex_lock(&port->port_lock);
2683
2684         netif_info(port, ifup, dev, "enabling port\n");
2685
2686         ret = ehea_up(dev);
2687         if (!ret) {
2688                 port_napi_enable(port);
2689                 netif_start_queue(dev);
2690         }
2691
2692         mutex_unlock(&port->port_lock);
2693
2694         return ret;
2695 }
2696
2697 static int ehea_down(struct net_device *dev)
2698 {
2699         int ret;
2700         struct ehea_port *port = netdev_priv(dev);
2701
2702         if (port->state == EHEA_PORT_DOWN)
2703                 return 0;
2704
2705         ehea_drop_multicast_list(dev);
2706         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2707
2708         ehea_free_interrupts(dev);
2709
2710         port->state = EHEA_PORT_DOWN;
2711
2712         ehea_update_bcmc_registrations();
2713
2714         ret = ehea_clean_all_portres(port);
2715         if (ret)
2716                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2717
2718         ehea_update_firmware_handles();
2719
2720         return ret;
2721 }
2722
2723 static int ehea_stop(struct net_device *dev)
2724 {
2725         int ret;
2726         struct ehea_port *port = netdev_priv(dev);
2727
2728         netif_info(port, ifdown, dev, "disabling port\n");
2729
2730         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2731         cancel_work_sync(&port->reset_task);
2732         mutex_lock(&port->port_lock);
2733         netif_stop_queue(dev);
2734         port_napi_disable(port);
2735         ret = ehea_down(dev);
2736         mutex_unlock(&port->port_lock);
2737         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2738         return ret;
2739 }
2740
2741 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2742 {
2743         struct ehea_qp qp = *orig_qp;
2744         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2745         struct ehea_swqe *swqe;
2746         int wqe_index;
2747         int i;
2748
2749         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2750                 swqe = ehea_get_swqe(&qp, &wqe_index);
2751                 swqe->tx_control |= EHEA_SWQE_PURGE;
2752         }
2753 }
2754
2755 static void ehea_flush_sq(struct ehea_port *port)
2756 {
2757         int i;
2758
2759         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2760                 struct ehea_port_res *pr = &port->port_res[i];
2761                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2762                 int ret;
2763
2764                 ret = wait_event_timeout(port->swqe_avail_wq,
2765                          atomic_read(&pr->swqe_avail) >= swqe_max,
2766                          msecs_to_jiffies(100));
2767
2768                 if (!ret) {
2769                         pr_err("WARNING: sq not flushed completely\n");
2770                         break;
2771                 }
2772         }
2773 }
2774
2775 int ehea_stop_qps(struct net_device *dev)
2776 {
2777         struct ehea_port *port = netdev_priv(dev);
2778         struct ehea_adapter *adapter = port->adapter;
2779         struct hcp_modify_qp_cb0 *cb0;
2780         int ret = -EIO;
2781         int dret;
2782         int i;
2783         u64 hret;
2784         u64 dummy64 = 0;
2785         u16 dummy16 = 0;
2786
2787         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2788         if (!cb0) {
2789                 ret = -ENOMEM;
2790                 goto out;
2791         }
2792
2793         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2794                 struct ehea_port_res *pr =  &port->port_res[i];
2795                 struct ehea_qp *qp = pr->qp;
2796
2797                 /* Purge send queue */
2798                 ehea_purge_sq(qp);
2799
2800                 /* Disable queue pair */
2801                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2802                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2803                                             cb0);
2804                 if (hret != H_SUCCESS) {
2805                         pr_err("query_ehea_qp failed (1)\n");
2806                         goto out;
2807                 }
2808
2809                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2810                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2811
2812                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2813                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2814                                                             1), cb0, &dummy64,
2815                                              &dummy64, &dummy16, &dummy16);
2816                 if (hret != H_SUCCESS) {
2817                         pr_err("modify_ehea_qp failed (1)\n");
2818                         goto out;
2819                 }
2820
2821                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2822                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2823                                             cb0);
2824                 if (hret != H_SUCCESS) {
2825                         pr_err("query_ehea_qp failed (2)\n");
2826                         goto out;
2827                 }
2828
2829                 /* deregister shared memory regions */
2830                 dret = ehea_rem_smrs(pr);
2831                 if (dret) {
2832                         pr_err("unreg shared memory region failed\n");
2833                         goto out;
2834                 }
2835         }
2836
2837         ret = 0;
2838 out:
2839         free_page((unsigned long)cb0);
2840
2841         return ret;
2842 }
2843
2844 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2845 {
2846         struct ehea_qp qp = *orig_qp;
2847         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2848         struct ehea_rwqe *rwqe;
2849         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2850         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2851         struct sk_buff *skb;
2852         u32 lkey = pr->recv_mr.lkey;
2853
2854
2855         int i;
2856         int index;
2857
2858         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2859                 rwqe = ehea_get_next_rwqe(&qp, 2);
2860                 rwqe->sg_list[0].l_key = lkey;
2861                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2862                 skb = skba_rq2[index];
2863                 if (skb)
2864                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2865         }
2866
2867         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2868                 rwqe = ehea_get_next_rwqe(&qp, 3);
2869                 rwqe->sg_list[0].l_key = lkey;
2870                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2871                 skb = skba_rq3[index];
2872                 if (skb)
2873                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2874         }
2875 }
2876
2877 int ehea_restart_qps(struct net_device *dev)
2878 {
2879         struct ehea_port *port = netdev_priv(dev);
2880         struct ehea_adapter *adapter = port->adapter;
2881         int ret = 0;
2882         int i;
2883
2884         struct hcp_modify_qp_cb0 *cb0;
2885         u64 hret;
2886         u64 dummy64 = 0;
2887         u16 dummy16 = 0;
2888
2889         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2890         if (!cb0) {
2891                 ret = -ENOMEM;
2892                 goto out;
2893         }
2894
2895         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2896                 struct ehea_port_res *pr =  &port->port_res[i];
2897                 struct ehea_qp *qp = pr->qp;
2898
2899                 ret = ehea_gen_smrs(pr);
2900                 if (ret) {
2901                         netdev_err(dev, "creation of shared memory regions failed\n");
2902                         goto out;
2903                 }
2904
2905                 ehea_update_rqs(qp, pr);
2906
2907                 /* Enable queue pair */
2908                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2909                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2910                                             cb0);
2911                 if (hret != H_SUCCESS) {
2912                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2913                         goto out;
2914                 }
2915
2916                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2917                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2918
2919                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2920                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2921                                                             1), cb0, &dummy64,
2922                                              &dummy64, &dummy16, &dummy16);
2923                 if (hret != H_SUCCESS) {
2924                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2925                         goto out;
2926                 }
2927
2928                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2929                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2930                                             cb0);
2931                 if (hret != H_SUCCESS) {
2932                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2933                         goto out;
2934                 }
2935
2936                 /* refill entire queue */
2937                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2938                 ehea_refill_rq2(pr, 0);
2939                 ehea_refill_rq3(pr, 0);
2940         }
2941 out:
2942         free_page((unsigned long)cb0);
2943
2944         return ret;
2945 }
2946
2947 static void ehea_reset_port(struct work_struct *work)
2948 {
2949         int ret;
2950         struct ehea_port *port =
2951                 container_of(work, struct ehea_port, reset_task);
2952         struct net_device *dev = port->netdev;
2953
2954         mutex_lock(&dlpar_mem_lock);
2955         port->resets++;
2956         mutex_lock(&port->port_lock);
2957         netif_stop_queue(dev);
2958
2959         port_napi_disable(port);
2960
2961         ehea_down(dev);
2962
2963         ret = ehea_up(dev);
2964         if (ret)
2965                 goto out;
2966
2967         ehea_set_multicast_list(dev);
2968
2969         netif_info(port, timer, dev, "reset successful\n");
2970
2971         port_napi_enable(port);
2972
2973         netif_wake_queue(dev);
2974 out:
2975         mutex_unlock(&port->port_lock);
2976         mutex_unlock(&dlpar_mem_lock);
2977 }
2978
2979 static void ehea_rereg_mrs(void)
2980 {
2981         int ret, i;
2982         struct ehea_adapter *adapter;
2983
2984         pr_info("LPAR memory changed - re-initializing driver\n");
2985
2986         list_for_each_entry(adapter, &adapter_list, list)
2987                 if (adapter->active_ports) {
2988                         /* Shutdown all ports */
2989                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2990                                 struct ehea_port *port = adapter->port[i];
2991                                 struct net_device *dev;
2992
2993                                 if (!port)
2994                                         continue;
2995
2996                                 dev = port->netdev;
2997
2998                                 if (dev->flags & IFF_UP) {
2999                                         mutex_lock(&port->port_lock);
3000                                         netif_stop_queue(dev);
3001                                         ehea_flush_sq(port);
3002                                         ret = ehea_stop_qps(dev);
3003                                         if (ret) {
3004                                                 mutex_unlock(&port->port_lock);
3005                                                 goto out;
3006                                         }
3007                                         port_napi_disable(port);
3008                                         mutex_unlock(&port->port_lock);
3009                                 }
3010                                 reset_sq_restart_flag(port);
3011                         }
3012
3013                         /* Unregister old memory region */
3014                         ret = ehea_rem_mr(&adapter->mr);
3015                         if (ret) {
3016                                 pr_err("unregister MR failed - driver inoperable!\n");
3017                                 goto out;
3018                         }
3019                 }
3020
3021         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3022
3023         list_for_each_entry(adapter, &adapter_list, list)
3024                 if (adapter->active_ports) {
3025                         /* Register new memory region */
3026                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3027                         if (ret) {
3028                                 pr_err("register MR failed - driver inoperable!\n");
3029                                 goto out;
3030                         }
3031
3032                         /* Restart all ports */
3033                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3034                                 struct ehea_port *port = adapter->port[i];
3035
3036                                 if (port) {
3037                                         struct net_device *dev = port->netdev;
3038
3039                                         if (dev->flags & IFF_UP) {
3040                                                 mutex_lock(&port->port_lock);
3041                                                 ret = ehea_restart_qps(dev);
3042                                                 if (!ret) {
3043                                                         check_sqs(port);
3044                                                         port_napi_enable(port);
3045                                                         netif_wake_queue(dev);
3046                                                 } else {
3047                                                         netdev_err(dev, "Unable to restart QPS\n");
3048                                                 }
3049                                                 mutex_unlock(&port->port_lock);
3050                                         }
3051                                 }
3052                         }
3053                 }
3054         pr_info("re-initializing driver complete\n");
3055 out:
3056         return;
3057 }
3058
3059 static void ehea_tx_watchdog(struct net_device *dev)
3060 {
3061         struct ehea_port *port = netdev_priv(dev);
3062
3063         if (netif_carrier_ok(dev) &&
3064             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3065                 ehea_schedule_port_reset(port);
3066 }
3067
3068 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3069 {
3070         struct hcp_query_ehea *cb;
3071         u64 hret;
3072         int ret;
3073
3074         cb = (void *)get_zeroed_page(GFP_KERNEL);
3075         if (!cb) {
3076                 ret = -ENOMEM;
3077                 goto out;
3078         }
3079
3080         hret = ehea_h_query_ehea(adapter->handle, cb);
3081
3082         if (hret != H_SUCCESS) {
3083                 ret = -EIO;
3084                 goto out_herr;
3085         }
3086
3087         adapter->max_mc_mac = cb->max_mc_mac - 1;
3088         ret = 0;
3089
3090 out_herr:
3091         free_page((unsigned long)cb);
3092 out:
3093         return ret;
3094 }
3095
3096 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3097 {
3098         struct hcp_ehea_port_cb4 *cb4;
3099         u64 hret;
3100         int ret = 0;
3101
3102         *jumbo = 0;
3103
3104         /* (Try to) enable *jumbo frames */
3105         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3106         if (!cb4) {
3107                 pr_err("no mem for cb4\n");
3108                 ret = -ENOMEM;
3109                 goto out;
3110         } else {
3111                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3112                                               port->logical_port_id,
3113                                               H_PORT_CB4,
3114                                               H_PORT_CB4_JUMBO, cb4);
3115                 if (hret == H_SUCCESS) {
3116                         if (cb4->jumbo_frame)
3117                                 *jumbo = 1;
3118                         else {
3119                                 cb4->jumbo_frame = 1;
3120                                 hret = ehea_h_modify_ehea_port(port->adapter->
3121                                                                handle,
3122                                                                port->
3123                                                                logical_port_id,
3124                                                                H_PORT_CB4,
3125                                                                H_PORT_CB4_JUMBO,
3126                                                                cb4);
3127                                 if (hret == H_SUCCESS)
3128                                         *jumbo = 1;
3129                         }
3130                 } else
3131                         ret = -EINVAL;
3132
3133                 free_page((unsigned long)cb4);
3134         }
3135 out:
3136         return ret;
3137 }
3138
3139 static ssize_t ehea_show_port_id(struct device *dev,
3140                                  struct device_attribute *attr, char *buf)
3141 {
3142         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3143         return sprintf(buf, "%d", port->logical_port_id);
3144 }
3145
3146 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3147                    NULL);
3148
3149 static void __devinit logical_port_release(struct device *dev)
3150 {
3151         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3152         of_node_put(port->ofdev.dev.of_node);
3153 }
3154
3155 static struct device *ehea_register_port(struct ehea_port *port,
3156                                          struct device_node *dn)
3157 {
3158         int ret;
3159
3160         port->ofdev.dev.of_node = of_node_get(dn);
3161         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3162         port->ofdev.dev.bus = &ibmebus_bus_type;
3163
3164         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3165         port->ofdev.dev.release = logical_port_release;
3166
3167         ret = of_device_register(&port->ofdev);
3168         if (ret) {
3169                 pr_err("failed to register device. ret=%d\n", ret);
3170                 goto out;
3171         }
3172
3173         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3174         if (ret) {
3175                 pr_err("failed to register attributes, ret=%d\n", ret);
3176                 goto out_unreg_of_dev;
3177         }
3178
3179         return &port->ofdev.dev;
3180
3181 out_unreg_of_dev:
3182         of_device_unregister(&port->ofdev);
3183 out:
3184         return NULL;
3185 }
3186
3187 static void ehea_unregister_port(struct ehea_port *port)
3188 {
3189         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3190         of_device_unregister(&port->ofdev);
3191 }
3192
3193 static const struct net_device_ops ehea_netdev_ops = {
3194         .ndo_open               = ehea_open,
3195         .ndo_stop               = ehea_stop,
3196         .ndo_start_xmit         = ehea_start_xmit,
3197 #ifdef CONFIG_NET_POLL_CONTROLLER
3198         .ndo_poll_controller    = ehea_netpoll,
3199 #endif
3200         .ndo_get_stats          = ehea_get_stats,
3201         .ndo_set_mac_address    = ehea_set_mac_addr,
3202         .ndo_validate_addr      = eth_validate_addr,
3203         .ndo_set_multicast_list = ehea_set_multicast_list,
3204         .ndo_change_mtu         = ehea_change_mtu,
3205         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3206         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3207         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3208         .ndo_tx_timeout         = ehea_tx_watchdog,
3209 };
3210
3211 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3212                                          u32 logical_port_id,
3213                                          struct device_node *dn)
3214 {
3215         int ret;
3216         struct net_device *dev;
3217         struct ehea_port *port;
3218         struct device *port_dev;
3219         int jumbo;
3220
3221         /* allocate memory for the port structures */
3222         dev = alloc_etherdev(sizeof(struct ehea_port));
3223
3224         if (!dev) {
3225                 pr_err("no mem for net_device\n");
3226                 ret = -ENOMEM;
3227                 goto out_err;
3228         }
3229
3230         port = netdev_priv(dev);
3231
3232         mutex_init(&port->port_lock);
3233         port->state = EHEA_PORT_DOWN;
3234         port->sig_comp_iv = sq_entries / 10;
3235
3236         port->adapter = adapter;
3237         port->netdev = dev;
3238         port->logical_port_id = logical_port_id;
3239
3240         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3241
3242         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3243         if (!port->mc_list) {
3244                 ret = -ENOMEM;
3245                 goto out_free_ethdev;
3246         }
3247
3248         INIT_LIST_HEAD(&port->mc_list->list);
3249
3250         ret = ehea_sense_port_attr(port);
3251         if (ret)
3252                 goto out_free_mc_list;
3253
3254         port_dev = ehea_register_port(port, dn);
3255         if (!port_dev)
3256                 goto out_free_mc_list;
3257
3258         SET_NETDEV_DEV(dev, port_dev);
3259
3260         /* initialize net_device structure */
3261         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3262
3263         dev->netdev_ops = &ehea_netdev_ops;
3264         ehea_set_ethtool_ops(dev);
3265
3266         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3267                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3268         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3269                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3270                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3271                       | NETIF_F_LLTX | NETIF_F_RXCSUM;
3272         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3273
3274         if (use_lro)
3275                 dev->features |= NETIF_F_LRO;
3276
3277         INIT_WORK(&port->reset_task, ehea_reset_port);
3278
3279         init_waitqueue_head(&port->swqe_avail_wq);
3280         init_waitqueue_head(&port->restart_wq);
3281
3282         ret = register_netdev(dev);
3283         if (ret) {
3284                 pr_err("register_netdev failed. ret=%d\n", ret);
3285                 goto out_unreg_port;
3286         }
3287
3288         port->lro_max_aggr = lro_max_aggr;
3289
3290         ret = ehea_get_jumboframe_status(port, &jumbo);
3291         if (ret)
3292                 netdev_err(dev, "failed determining jumbo frame status\n");
3293
3294         netdev_info(dev, "Jumbo frames are %sabled\n",
3295                     jumbo == 1 ? "en" : "dis");
3296
3297         adapter->active_ports++;
3298
3299         return port;
3300
3301 out_unreg_port:
3302         ehea_unregister_port(port);
3303
3304 out_free_mc_list:
3305         kfree(port->mc_list);
3306
3307 out_free_ethdev:
3308         free_netdev(dev);
3309
3310 out_err:
3311         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3312                logical_port_id, ret);
3313         return NULL;
3314 }
3315
3316 static void ehea_shutdown_single_port(struct ehea_port *port)
3317 {
3318         struct ehea_adapter *adapter = port->adapter;
3319
3320         cancel_work_sync(&port->reset_task);
3321         unregister_netdev(port->netdev);
3322         ehea_unregister_port(port);
3323         kfree(port->mc_list);
3324         free_netdev(port->netdev);
3325         adapter->active_ports--;
3326 }
3327
3328 static int ehea_setup_ports(struct ehea_adapter *adapter)
3329 {
3330         struct device_node *lhea_dn;
3331         struct device_node *eth_dn = NULL;
3332
3333         const u32 *dn_log_port_id;
3334         int i = 0;
3335
3336         lhea_dn = adapter->ofdev->dev.of_node;
3337         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3338
3339                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3340                                                  NULL);
3341                 if (!dn_log_port_id) {
3342                         pr_err("bad device node: eth_dn name=%s\n",
3343                                eth_dn->full_name);
3344                         continue;
3345                 }
3346
3347                 if (ehea_add_adapter_mr(adapter)) {
3348                         pr_err("creating MR failed\n");
3349                         of_node_put(eth_dn);
3350                         return -EIO;
3351                 }
3352
3353                 adapter->port[i] = ehea_setup_single_port(adapter,
3354                                                           *dn_log_port_id,
3355                                                           eth_dn);
3356                 if (adapter->port[i])
3357                         netdev_info(adapter->port[i]->netdev,
3358                                     "logical port id #%d\n", *dn_log_port_id);
3359                 else
3360                         ehea_remove_adapter_mr(adapter);
3361
3362                 i++;
3363         }
3364         return 0;
3365 }
3366
3367 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3368                                            u32 logical_port_id)
3369 {
3370         struct device_node *lhea_dn;
3371         struct device_node *eth_dn = NULL;
3372         const u32 *dn_log_port_id;
3373
3374         lhea_dn = adapter->ofdev->dev.of_node;
3375         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3376
3377                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3378                                                  NULL);
3379                 if (dn_log_port_id)
3380                         if (*dn_log_port_id == logical_port_id)
3381                                 return eth_dn;
3382         }
3383
3384         return NULL;
3385 }
3386
3387 static ssize_t ehea_probe_port(struct device *dev,
3388                                struct device_attribute *attr,
3389                                const char *buf, size_t count)
3390 {
3391         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3392         struct ehea_port *port;
3393         struct device_node *eth_dn = NULL;
3394         int i;
3395
3396         u32 logical_port_id;
3397
3398         sscanf(buf, "%d", &logical_port_id);
3399
3400         port = ehea_get_port(adapter, logical_port_id);
3401
3402         if (port) {
3403                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3404                             logical_port_id);
3405                 return -EINVAL;
3406         }
3407
3408         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3409
3410         if (!eth_dn) {
3411                 pr_info("no logical port with id %d found\n", logical_port_id);
3412                 return -EINVAL;
3413         }
3414
3415         if (ehea_add_adapter_mr(adapter)) {
3416                 pr_err("creating MR failed\n");
3417                 return -EIO;
3418         }
3419
3420         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3421
3422         of_node_put(eth_dn);
3423
3424         if (port) {
3425                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3426                         if (!adapter->port[i]) {
3427                                 adapter->port[i] = port;
3428                                 break;
3429                         }
3430
3431                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3432                             logical_port_id);
3433         } else {
3434                 ehea_remove_adapter_mr(adapter);
3435                 return -EIO;
3436         }
3437
3438         return (ssize_t) count;
3439 }
3440
3441 static ssize_t ehea_remove_port(struct device *dev,
3442                                 struct device_attribute *attr,
3443                                 const char *buf, size_t count)
3444 {
3445         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3446         struct ehea_port *port;
3447         int i;
3448         u32 logical_port_id;
3449
3450         sscanf(buf, "%d", &logical_port_id);
3451
3452         port = ehea_get_port(adapter, logical_port_id);
3453
3454         if (port) {
3455                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3456                             logical_port_id);
3457
3458                 ehea_shutdown_single_port(port);
3459
3460                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3461                         if (adapter->port[i] == port) {
3462                                 adapter->port[i] = NULL;
3463                                 break;
3464                         }
3465         } else {
3466                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3467                        logical_port_id);
3468                 return -EINVAL;
3469         }
3470
3471         ehea_remove_adapter_mr(adapter);
3472
3473         return (ssize_t) count;
3474 }
3475
3476 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3477 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3478
3479 int ehea_create_device_sysfs(struct platform_device *dev)
3480 {
3481         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3482         if (ret)
3483                 goto out;
3484
3485         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3486 out:
3487         return ret;
3488 }
3489
3490 void ehea_remove_device_sysfs(struct platform_device *dev)
3491 {
3492         device_remove_file(&dev->dev, &dev_attr_probe_port);
3493         device_remove_file(&dev->dev, &dev_attr_remove_port);
3494 }
3495
3496 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3497                                         const struct of_device_id *id)
3498 {
3499         struct ehea_adapter *adapter;
3500         const u64 *adapter_handle;
3501         int ret;
3502
3503         if (!dev || !dev->dev.of_node) {
3504                 pr_err("Invalid ibmebus device probed\n");
3505                 return -EINVAL;
3506         }
3507
3508         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3509         if (!adapter) {
3510                 ret = -ENOMEM;
3511                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3512                 goto out;
3513         }
3514
3515         list_add(&adapter->list, &adapter_list);
3516
3517         adapter->ofdev = dev;
3518
3519         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3520                                          NULL);
3521         if (adapter_handle)
3522                 adapter->handle = *adapter_handle;
3523
3524         if (!adapter->handle) {
3525                 dev_err(&dev->dev, "failed getting handle for adapter"
3526                         " '%s'\n", dev->dev.of_node->full_name);
3527                 ret = -ENODEV;
3528                 goto out_free_ad;
3529         }
3530
3531         adapter->pd = EHEA_PD_ID;
3532
3533         dev_set_drvdata(&dev->dev, adapter);
3534
3535
3536         /* initialize adapter and ports */
3537         /* get adapter properties */
3538         ret = ehea_sense_adapter_attr(adapter);
3539         if (ret) {
3540                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3541                 goto out_free_ad;
3542         }
3543
3544         adapter->neq = ehea_create_eq(adapter,
3545                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3546         if (!adapter->neq) {
3547                 ret = -EIO;
3548                 dev_err(&dev->dev, "NEQ creation failed\n");
3549                 goto out_free_ad;
3550         }
3551
3552         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3553                      (unsigned long)adapter);
3554
3555         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3556                                   ehea_interrupt_neq, IRQF_DISABLED,
3557                                   "ehea_neq", adapter);
3558         if (ret) {
3559                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3560                 goto out_kill_eq;
3561         }
3562
3563         ret = ehea_create_device_sysfs(dev);
3564         if (ret)
3565                 goto out_free_irq;
3566
3567         ret = ehea_setup_ports(adapter);
3568         if (ret) {
3569                 dev_err(&dev->dev, "setup_ports failed\n");
3570                 goto out_rem_dev_sysfs;
3571         }
3572
3573         ret = 0;
3574         goto out;
3575
3576 out_rem_dev_sysfs:
3577         ehea_remove_device_sysfs(dev);
3578
3579 out_free_irq:
3580         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3581
3582 out_kill_eq:
3583         ehea_destroy_eq(adapter->neq);
3584
3585 out_free_ad:
3586         list_del(&adapter->list);
3587         kfree(adapter);
3588
3589 out:
3590         ehea_update_firmware_handles();
3591
3592         return ret;
3593 }
3594
3595 static int __devexit ehea_remove(struct platform_device *dev)
3596 {
3597         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3598         int i;
3599
3600         for (i = 0; i < EHEA_MAX_PORTS; i++)
3601                 if (adapter->port[i]) {
3602                         ehea_shutdown_single_port(adapter->port[i]);
3603                         adapter->port[i] = NULL;
3604                 }
3605
3606         ehea_remove_device_sysfs(dev);
3607
3608         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3609         tasklet_kill(&adapter->neq_tasklet);
3610
3611         ehea_destroy_eq(adapter->neq);
3612         ehea_remove_adapter_mr(adapter);
3613         list_del(&adapter->list);
3614         kfree(adapter);
3615
3616         ehea_update_firmware_handles();
3617
3618         return 0;
3619 }
3620
3621 void ehea_crash_handler(void)
3622 {
3623         int i;
3624
3625         if (ehea_fw_handles.arr)
3626                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3627                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3628                                              ehea_fw_handles.arr[i].fwh,
3629                                              FORCE_FREE);
3630
3631         if (ehea_bcmc_regs.arr)
3632                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3633                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3634                                               ehea_bcmc_regs.arr[i].port_id,
3635                                               ehea_bcmc_regs.arr[i].reg_type,
3636                                               ehea_bcmc_regs.arr[i].macaddr,
3637                                               0, H_DEREG_BCMC);
3638 }
3639
3640 static int ehea_mem_notifier(struct notifier_block *nb,
3641                              unsigned long action, void *data)
3642 {
3643         int ret = NOTIFY_BAD;
3644         struct memory_notify *arg = data;
3645
3646         mutex_lock(&dlpar_mem_lock);
3647
3648         switch (action) {
3649         case MEM_CANCEL_OFFLINE:
3650                 pr_info("memory offlining canceled");
3651                 /* Readd canceled memory block */
3652         case MEM_ONLINE:
3653                 pr_info("memory is going online");
3654                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3655                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3656                         goto out_unlock;
3657                 ehea_rereg_mrs();
3658                 break;
3659         case MEM_GOING_OFFLINE:
3660                 pr_info("memory is going offline");
3661                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3662                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3663                         goto out_unlock;
3664                 ehea_rereg_mrs();
3665                 break;
3666         default:
3667                 break;
3668         }
3669
3670         ehea_update_firmware_handles();
3671         ret = NOTIFY_OK;
3672
3673 out_unlock:
3674         mutex_unlock(&dlpar_mem_lock);
3675         return ret;
3676 }
3677
3678 static struct notifier_block ehea_mem_nb = {
3679         .notifier_call = ehea_mem_notifier,
3680 };
3681
3682 static int ehea_reboot_notifier(struct notifier_block *nb,
3683                                 unsigned long action, void *unused)
3684 {
3685         if (action == SYS_RESTART) {
3686                 pr_info("Reboot: freeing all eHEA resources\n");
3687                 ibmebus_unregister_driver(&ehea_driver);
3688         }
3689         return NOTIFY_DONE;
3690 }
3691
3692 static struct notifier_block ehea_reboot_nb = {
3693         .notifier_call = ehea_reboot_notifier,
3694 };
3695
3696 static int check_module_parm(void)
3697 {
3698         int ret = 0;
3699
3700         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3701             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3702                 pr_info("Bad parameter: rq1_entries\n");
3703                 ret = -EINVAL;
3704         }
3705         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3706             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3707                 pr_info("Bad parameter: rq2_entries\n");
3708                 ret = -EINVAL;
3709         }
3710         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3711             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3712                 pr_info("Bad parameter: rq3_entries\n");
3713                 ret = -EINVAL;
3714         }
3715         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3716             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3717                 pr_info("Bad parameter: sq_entries\n");
3718                 ret = -EINVAL;
3719         }
3720
3721         return ret;
3722 }
3723
3724 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3725                                       char *buf)
3726 {
3727         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3728 }
3729
3730 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3731                    ehea_show_capabilities, NULL);
3732
3733 int __init ehea_module_init(void)
3734 {
3735         int ret;
3736
3737         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3738
3739         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3740         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3741
3742         mutex_init(&ehea_fw_handles.lock);
3743         spin_lock_init(&ehea_bcmc_regs.lock);
3744
3745         ret = check_module_parm();
3746         if (ret)
3747                 goto out;
3748
3749         ret = ehea_create_busmap();
3750         if (ret)
3751                 goto out;
3752
3753         ret = register_reboot_notifier(&ehea_reboot_nb);
3754         if (ret)
3755                 pr_info("failed registering reboot notifier\n");
3756
3757         ret = register_memory_notifier(&ehea_mem_nb);
3758         if (ret)
3759                 pr_info("failed registering memory remove notifier\n");
3760
3761         ret = crash_shutdown_register(ehea_crash_handler);
3762         if (ret)
3763                 pr_info("failed registering crash handler\n");
3764
3765         ret = ibmebus_register_driver(&ehea_driver);
3766         if (ret) {
3767                 pr_err("failed registering eHEA device driver on ebus\n");
3768                 goto out2;
3769         }
3770
3771         ret = driver_create_file(&ehea_driver.driver,
3772                                  &driver_attr_capabilities);
3773         if (ret) {
3774                 pr_err("failed to register capabilities attribute, ret=%d\n",
3775                        ret);
3776                 goto out3;
3777         }
3778
3779         return ret;
3780
3781 out3:
3782         ibmebus_unregister_driver(&ehea_driver);
3783 out2:
3784         unregister_memory_notifier(&ehea_mem_nb);
3785         unregister_reboot_notifier(&ehea_reboot_nb);
3786         crash_shutdown_unregister(ehea_crash_handler);
3787 out:
3788         return ret;
3789 }
3790
3791 static void __exit ehea_module_exit(void)
3792 {
3793         int ret;
3794
3795         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3796         ibmebus_unregister_driver(&ehea_driver);
3797         unregister_reboot_notifier(&ehea_reboot_nb);
3798         ret = crash_shutdown_unregister(ehea_crash_handler);
3799         if (ret)
3800                 pr_info("failed unregistering crash handler\n");
3801         unregister_memory_notifier(&ehea_mem_nb);
3802         kfree(ehea_fw_handles.arr);
3803         kfree(ehea_bcmc_regs.arr);
3804         ehea_destroy_busmap();
3805 }
3806
3807 module_init(ehea_module_init);
3808 module_exit(ehea_module_exit);