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