drivers/net/ethernet/ibm/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ethernet/ibm/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/device.h>
  32 #include <linux/in.h>
  33 #include <linux/ip.h>
  34 #include <linux/tcp.h>
  35 #include <linux/udp.h>
  36 #include <linux/if.h>
  37 #include <linux/list.h>
  38 #include <linux/slab.h>
  39 #include <linux/if_ether.h>
  40 #include <linux/notifier.h>
  41 #include <linux/reboot.h>
  42 #include <linux/memory.h>
  43 #include <asm/kexec.h>
  44 #include <linux/mutex.h>
  45 #include <linux/prefetch.h>
  46
  47 #include <net/ip.h>
  48
  49 #include "ehea.h"
  50 #include "ehea_qmr.h"
  51 #include "ehea_phyp.h"
  52
  53
  54 MODULE_LICENSE("GPL");
  55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  56 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  57 MODULE_VERSION(DRV_VERSION);
  58
  59
  60 static int msg_level = -1;
  61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  64 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  65 static int use_mcs = 1;
  66 static int prop_carrier_state;
  67
  68 module_param(msg_level, int, 0);
  69 module_param(rq1_entries, int, 0);
  70 module_param(rq2_entries, int, 0);
  71 module_param(rq3_entries, int, 0);
  72 module_param(sq_entries, int, 0);
  73 module_param(prop_carrier_state, int, 0);
  74 module_param(use_mcs, int, 0);
  75
  76 MODULE_PARM_DESC(msg_level, "msg_level");
  77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  78                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  80                  "[2^x - 1], x = [7..14]. Default = "
  81                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  83                  "[2^x - 1], x = [7..14]. Default = "
  84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  86                  "[2^x - 1], x = [7..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  89                  "[2^x - 1], x = [7..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  92                  "Default = 1");
  93
  94 static int port_name_cnt;
  95 static LIST_HEAD(adapter_list);
  96 static unsigned long ehea_driver_flags;
  97 static DEFINE_MUTEX(dlpar_mem_lock);
  98 static struct ehea_fw_handle_array ehea_fw_handles;
  99 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
 100
 101
 102 static int ehea_probe_adapter(struct platform_device *dev);
 103
 104 static int ehea_remove(struct platform_device *dev);
 105
 106 static const struct of_device_id ehea_module_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {
 112                 .type = "network",
 113                 .compatible = "IBM,lhea-ethernet",
 114         },
 115         {},
 116 };
 117 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 118
 119 static const struct of_device_id ehea_device_table[] = {
 120         {
 121                 .name = "lhea",
 122                 .compatible = "IBM,lhea",
 123         },
 124         {},
 125 };
 126
 127 static struct platform_driver ehea_driver = {
 128         .driver = {
 129                 .name = "ehea",
 130                 .owner = THIS_MODULE,
 131                 .of_match_table = ehea_device_table,
 132         },
 133         .probe = ehea_probe_adapter,
 134         .remove = ehea_remove,
 135 };
 136
 137 void ehea_dump(void *adr, int len, char *msg)
 138 {
 139         int x;
 140         unsigned char *deb = adr;
 141         for (x = 0; x < len; x += 16) {
 142                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 143                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 144                 deb += 16;
 145         }
 146 }
 147
 148 static void ehea_schedule_port_reset(struct ehea_port *port)
 149 {
 150         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 151                 schedule_work(&port->reset_task);
 152 }
 153
 154 static void ehea_update_firmware_handles(void)
 155 {
 156         struct ehea_fw_handle_entry *arr = NULL;
 157         struct ehea_adapter *adapter;
 158         int num_adapters = 0;
 159         int num_ports = 0;
 160         int num_portres = 0;
 161         int i = 0;
 162         int num_fw_handles, k, l;
 163
 164         /* Determine number of handles */
 165         mutex_lock(&ehea_fw_handles.lock);
 166
 167         list_for_each_entry(adapter, &adapter_list, list) {
 168                 num_adapters++;
 169
 170                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 171                         struct ehea_port *port = adapter->port[k];
 172
 173                         if (!port || (port->state != EHEA_PORT_UP))
 174                                 continue;
 175
 176                         num_ports++;
 177                         num_portres += port->num_def_qps;
 178                 }
 179         }
 180
 181         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 182                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 183                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 184
 185         if (num_fw_handles) {
 186                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 187                 if (!arr)
 188                         goto out;  /* Keep the existing array */
 189         } else
 190                 goto out_update;
 191
 192         list_for_each_entry(adapter, &adapter_list, list) {
 193                 if (num_adapters == 0)
 194                         break;
 195
 196                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 197                         struct ehea_port *port = adapter->port[k];
 198
 199                         if (!port || (port->state != EHEA_PORT_UP) ||
 200                             (num_ports == 0))
 201                                 continue;
 202
 203                         for (l = 0; l < port->num_def_qps; l++) {
 204                                 struct ehea_port_res *pr = &port->port_res[l];
 205
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->qp->fw_handle;
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->send_cq->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->eq->fw_handle;
 214                                 arr[i].adh = adapter->handle;
 215                                 arr[i++].fwh = pr->send_mr.handle;
 216                                 arr[i].adh = adapter->handle;
 217                                 arr[i++].fwh = pr->recv_mr.handle;
 218                         }
 219                         arr[i].adh = adapter->handle;
 220                         arr[i++].fwh = port->qp_eq->fw_handle;
 221                         num_ports--;
 222                 }
 223
 224                 arr[i].adh = adapter->handle;
 225                 arr[i++].fwh = adapter->neq->fw_handle;
 226
 227                 if (adapter->mr.handle) {
 228                         arr[i].adh = adapter->handle;
 229                         arr[i++].fwh = adapter->mr.handle;
 230                 }
 231                 num_adapters--;
 232         }
 233
 234 out_update:
 235         kfree(ehea_fw_handles.arr);
 236         ehea_fw_handles.arr = arr;
 237         ehea_fw_handles.num_entries = i;
 238 out:
 239         mutex_unlock(&ehea_fw_handles.lock);
 240 }
 241
 242 static void ehea_update_bcmc_registrations(void)
 243 {
 244         unsigned long flags;
 245         struct ehea_bcmc_reg_entry *arr = NULL;
 246         struct ehea_adapter *adapter;
 247         struct ehea_mc_list *mc_entry;
 248         int num_registrations = 0;
 249         int i = 0;
 250         int k;
 251
 252         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 253
 254         /* Determine number of registrations */
 255         list_for_each_entry(adapter, &adapter_list, list)
 256                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 257                         struct ehea_port *port = adapter->port[k];
 258
 259                         if (!port || (port->state != EHEA_PORT_UP))
 260                                 continue;
 261
 262                         num_registrations += 2; /* Broadcast registrations */
 263
 264                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 265                                 num_registrations += 2;
 266                 }
 267
 268         if (num_registrations) {
 269                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 270                 if (!arr)
 271                         goto out;  /* Keep the existing array */
 272         } else
 273                 goto out_update;
 274
 275         list_for_each_entry(adapter, &adapter_list, list) {
 276                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 277                         struct ehea_port *port = adapter->port[k];
 278
 279                         if (!port || (port->state != EHEA_PORT_UP))
 280                                 continue;
 281
 282                         if (num_registrations == 0)
 283                                 goto out_update;
 284
 285                         arr[i].adh = adapter->handle;
 286                         arr[i].port_id = port->logical_port_id;
 287                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 288                                           EHEA_BCMC_UNTAGGED;
 289                         arr[i++].macaddr = port->mac_addr;
 290
 291                         arr[i].adh = adapter->handle;
 292                         arr[i].port_id = port->logical_port_id;
 293                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 294                                           EHEA_BCMC_VLANID_ALL;
 295                         arr[i++].macaddr = port->mac_addr;
 296                         num_registrations -= 2;
 297
 298                         list_for_each_entry(mc_entry,
 299                                             &port->mc_list->list, list) {
 300                                 if (num_registrations == 0)
 301                                         goto out_update;
 302
 303                                 arr[i].adh = adapter->handle;
 304                                 arr[i].port_id = port->logical_port_id;
 305                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 306                                                   EHEA_BCMC_UNTAGGED;
 307                                 if (mc_entry->macaddr == 0)
 308                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 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_MULTICAST |
 314                                                   EHEA_BCMC_VLANID_ALL;
 315                                 if (mc_entry->macaddr == 0)
 316                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 317                                 arr[i++].macaddr = mc_entry->macaddr;
 318                                 num_registrations -= 2;
 319                         }
 320                 }
 321         }
 322
 323 out_update:
 324         kfree(ehea_bcmc_regs.arr);
 325         ehea_bcmc_regs.arr = arr;
 326         ehea_bcmc_regs.num_entries = i;
 327 out:
 328         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 329 }
 330
 331 static void ehea_get_stats64(struct net_device *dev,
 332                              struct rtnl_link_stats64 *stats)
 333 {
 334         struct ehea_port *port = netdev_priv(dev);
 335         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 336         int i;
 337
 338         for (i = 0; i < port->num_def_qps; i++) {
 339                 rx_packets += port->port_res[i].rx_packets;
 340                 rx_bytes   += port->port_res[i].rx_bytes;
 341         }
 342
 343         for (i = 0; i < port->num_def_qps; i++) {
 344                 tx_packets += port->port_res[i].tx_packets;
 345                 tx_bytes   += port->port_res[i].tx_bytes;
 346         }
 347
 348         stats->tx_packets = tx_packets;
 349         stats->rx_bytes = rx_bytes;
 350         stats->tx_bytes = tx_bytes;
 351         stats->rx_packets = rx_packets;
 352
 353         stats->multicast = port->stats.multicast;
 354         stats->rx_errors = port->stats.rx_errors;
 355 }
 356
 357 static void ehea_update_stats(struct work_struct *work)
 358 {
 359         struct ehea_port *port =
 360                 container_of(work, struct ehea_port, stats_work.work);
 361         struct net_device *dev = port->netdev;
 362         struct rtnl_link_stats64 *stats = &port->stats;
 363         struct hcp_ehea_port_cb2 *cb2;
 364         u64 hret;
 365
 366         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 367         if (!cb2) {
 368                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 369                 goto resched;
 370         }
 371
 372         hret = ehea_h_query_ehea_port(port->adapter->handle,
 373                                       port->logical_port_id,
 374                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 375         if (hret != H_SUCCESS) {
 376                 netdev_err(dev, "query_ehea_port failed\n");
 377                 goto out_herr;
 378         }
 379
 380         if (netif_msg_hw(port))
 381                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 382
 383         stats->multicast = cb2->rxmcp;
 384         stats->rx_errors = cb2->rxuerr;
 385
 386 out_herr:
 387         free_page((unsigned long)cb2);
 388 resched:
 389         schedule_delayed_work(&port->stats_work,
 390                               round_jiffies_relative(msecs_to_jiffies(1000)));
 391 }
 392
 393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 394 {
 395         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 396         struct net_device *dev = pr->port->netdev;
 397         int max_index_mask = pr->rq1_skba.len - 1;
 398         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 399         int adder = 0;
 400         int i;
 401
 402         pr->rq1_skba.os_skbs = 0;
 403
 404         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 405                 if (nr_of_wqes > 0)
 406                         pr->rq1_skba.index = index;
 407                 pr->rq1_skba.os_skbs = fill_wqes;
 408                 return;
 409         }
 410
 411         for (i = 0; i < fill_wqes; i++) {
 412                 if (!skb_arr_rq1[index]) {
 413                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 414                                                               EHEA_L_PKT_SIZE);
 415                         if (!skb_arr_rq1[index]) {
 416                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 417                                 break;
 418                         }
 419                 }
 420                 index--;
 421                 index &= max_index_mask;
 422                 adder++;
 423         }
 424
 425         if (adder == 0)
 426                 return;
 427
 428         /* Ring doorbell */
 429         ehea_update_rq1a(pr->qp, adder);
 430 }
 431
 432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 433 {
 434         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 435         struct net_device *dev = pr->port->netdev;
 436         int i;
 437
 438         if (nr_rq1a > pr->rq1_skba.len) {
 439                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 440                 return;
 441         }
 442
 443         for (i = 0; i < nr_rq1a; i++) {
 444                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 445                 if (!skb_arr_rq1[i])
 446                         break;
 447         }
 448         /* Ring doorbell */
 449         ehea_update_rq1a(pr->qp, i - 1);
 450 }
 451
 452 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 453                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 454                               int num_wqes, int wqe_type, int packet_size)
 455 {
 456         struct net_device *dev = pr->port->netdev;
 457         struct ehea_qp *qp = pr->qp;
 458         struct sk_buff **skb_arr = q_skba->arr;
 459         struct ehea_rwqe *rwqe;
 460         int i, index, max_index_mask, fill_wqes;
 461         int adder = 0;
 462         int ret = 0;
 463
 464         fill_wqes = q_skba->os_skbs + num_wqes;
 465         q_skba->os_skbs = 0;
 466
 467         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 468                 q_skba->os_skbs = fill_wqes;
 469                 return ret;
 470         }
 471
 472         index = q_skba->index;
 473         max_index_mask = q_skba->len - 1;
 474         for (i = 0; i < fill_wqes; i++) {
 475                 u64 tmp_addr;
 476                 struct sk_buff *skb;
 477
 478                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 479                 if (!skb) {
 480                         q_skba->os_skbs = fill_wqes - i;
 481                         if (q_skba->os_skbs == q_skba->len - 2) {
 482                                 netdev_info(pr->port->netdev,
 483                                             "rq%i ran dry - no mem for skb\n",
 484                                             rq_nr);
 485                                 ret = -ENOMEM;
 486                         }
 487                         break;
 488                 }
 489
 490                 skb_arr[index] = skb;
 491                 tmp_addr = ehea_map_vaddr(skb->data);
 492                 if (tmp_addr == -1) {
 493                         dev_consume_skb_any(skb);
 494                         q_skba->os_skbs = fill_wqes - i;
 495                         ret = 0;
 496                         break;
 497                 }
 498
 499                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 500                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 501                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 502                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 503                 rwqe->sg_list[0].vaddr = tmp_addr;
 504                 rwqe->sg_list[0].len = packet_size;
 505                 rwqe->data_segments = 1;
 506
 507                 index++;
 508                 index &= max_index_mask;
 509                 adder++;
 510         }
 511
 512         q_skba->index = index;
 513         if (adder == 0)
 514                 goto out;
 515
 516         /* Ring doorbell */
 517         iosync();
 518         if (rq_nr == 2)
 519                 ehea_update_rq2a(pr->qp, adder);
 520         else
 521                 ehea_update_rq3a(pr->qp, adder);
 522 out:
 523         return ret;
 524 }
 525
 526
 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 528 {
 529         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 530                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 531                                   EHEA_RQ2_PKT_SIZE);
 532 }
 533
 534
 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 536 {
 537         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 538                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 539                                   EHEA_MAX_PACKET_SIZE);
 540 }
 541
 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 543 {
 544         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 545         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 546                 return 0;
 547         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 548             (cqe->header_length == 0))
 549                 return 0;
 550         return -EINVAL;
 551 }
 552
 553 static inline void ehea_fill_skb(struct net_device *dev,
 554                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 555                                  struct ehea_port_res *pr)
 556 {
 557         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 558
 559         skb_put(skb, length);
 560         skb->protocol = eth_type_trans(skb, dev);
 561
 562         /* The packet was not an IPV4 packet so a complemented checksum was
 563            calculated. The value is found in the Internet Checksum field. */
 564         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 565                 skb->ip_summed = CHECKSUM_COMPLETE;
 566                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 567         } else
 568                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 569
 570         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 571 }
 572
 573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 574                                                int arr_len,
 575                                                struct ehea_cqe *cqe)
 576 {
 577         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 578         struct sk_buff *skb;
 579         void *pref;
 580         int x;
 581
 582         x = skb_index + 1;
 583         x &= (arr_len - 1);
 584
 585         pref = skb_array[x];
 586         if (pref) {
 587                 prefetchw(pref);
 588                 prefetchw(pref + EHEA_CACHE_LINE);
 589
 590                 pref = (skb_array[x]->data);
 591                 prefetch(pref);
 592                 prefetch(pref + EHEA_CACHE_LINE);
 593                 prefetch(pref + EHEA_CACHE_LINE * 2);
 594                 prefetch(pref + EHEA_CACHE_LINE * 3);
 595         }
 596
 597         skb = skb_array[skb_index];
 598         skb_array[skb_index] = NULL;
 599         return skb;
 600 }
 601
 602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 603                                                   int arr_len, int wqe_index)
 604 {
 605         struct sk_buff *skb;
 606         void *pref;
 607         int x;
 608
 609         x = wqe_index + 1;
 610         x &= (arr_len - 1);
 611
 612         pref = skb_array[x];
 613         if (pref) {
 614                 prefetchw(pref);
 615                 prefetchw(pref + EHEA_CACHE_LINE);
 616
 617                 pref = (skb_array[x]->data);
 618                 prefetchw(pref);
 619                 prefetchw(pref + EHEA_CACHE_LINE);
 620         }
 621
 622         skb = skb_array[wqe_index];
 623         skb_array[wqe_index] = NULL;
 624         return skb;
 625 }
 626
 627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 628                                  struct ehea_cqe *cqe, int *processed_rq2,
 629                                  int *processed_rq3)
 630 {
 631         struct sk_buff *skb;
 632
 633         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 634                 pr->p_stats.err_tcp_cksum++;
 635         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 636                 pr->p_stats.err_ip_cksum++;
 637         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 638                 pr->p_stats.err_frame_crc++;
 639
 640         if (rq == 2) {
 641                 *processed_rq2 += 1;
 642                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 643                 dev_kfree_skb(skb);
 644         } else if (rq == 3) {
 645                 *processed_rq3 += 1;
 646                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 647                 dev_kfree_skb(skb);
 648         }
 649
 650         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 651                 if (netif_msg_rx_err(pr->port)) {
 652                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 653                                pr->qp->init_attr.qp_nr);
 654                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 655                 }
 656                 ehea_schedule_port_reset(pr->port);
 657                 return 1;
 658         }
 659
 660         return 0;
 661 }
 662
 663 static int ehea_proc_rwqes(struct net_device *dev,
 664                            struct ehea_port_res *pr,
 665                            int budget)
 666 {
 667         struct ehea_port *port = pr->port;
 668         struct ehea_qp *qp = pr->qp;
 669         struct ehea_cqe *cqe;
 670         struct sk_buff *skb;
 671         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 672         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 673         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 674         int skb_arr_rq1_len = pr->rq1_skba.len;
 675         int skb_arr_rq2_len = pr->rq2_skba.len;
 676         int skb_arr_rq3_len = pr->rq3_skba.len;
 677         int processed, processed_rq1, processed_rq2, processed_rq3;
 678         u64 processed_bytes = 0;
 679         int wqe_index, last_wqe_index, rq, port_reset;
 680
 681         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 682         last_wqe_index = 0;
 683
 684         cqe = ehea_poll_rq1(qp, &wqe_index);
 685         while ((processed < budget) && cqe) {
 686                 ehea_inc_rq1(qp);
 687                 processed_rq1++;
 688                 processed++;
 689                 if (netif_msg_rx_status(port))
 690                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 691
 692                 last_wqe_index = wqe_index;
 693                 rmb();
 694                 if (!ehea_check_cqe(cqe, &rq)) {
 695                         if (rq == 1) {
 696                                 /* LL RQ1 */
 697                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 698                                                           skb_arr_rq1_len,
 699                                                           wqe_index);
 700                                 if (unlikely(!skb)) {
 701                                         netif_info(port, rx_err, dev,
 702                                                   "LL rq1: skb=NULL\n");
 703
 704                                         skb = netdev_alloc_skb(dev,
 705                                                                EHEA_L_PKT_SIZE);
 706                                         if (!skb)
 707                                                 break;
 708                                 }
 709                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 710                                                  cqe->num_bytes_transfered - 4);
 711                                 ehea_fill_skb(dev, skb, cqe, pr);
 712                         } else if (rq == 2) {
 713                                 /* RQ2 */
 714                                 skb = get_skb_by_index(skb_arr_rq2,
 715                                                        skb_arr_rq2_len, cqe);
 716                                 if (unlikely(!skb)) {
 717                                         netif_err(port, rx_err, dev,
 718                                                   "rq2: skb=NULL\n");
 719                                         break;
 720                                 }
 721                                 ehea_fill_skb(dev, skb, cqe, pr);
 722                                 processed_rq2++;
 723                         } else {
 724                                 /* RQ3 */
 725                                 skb = get_skb_by_index(skb_arr_rq3,
 726                                                        skb_arr_rq3_len, cqe);
 727                                 if (unlikely(!skb)) {
 728                                         netif_err(port, rx_err, dev,
 729                                                   "rq3: skb=NULL\n");
 730                                         break;
 731                                 }
 732                                 ehea_fill_skb(dev, skb, cqe, pr);
 733                                 processed_rq3++;
 734                         }
 735
 736                         processed_bytes += skb->len;
 737
 738                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 739                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 740                                                        cqe->vlan_tag);
 741
 742                         napi_gro_receive(&pr->napi, skb);
 743                 } else {
 744                         pr->p_stats.poll_receive_errors++;
 745                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 746                                                            &processed_rq2,
 747                                                            &processed_rq3);
 748                         if (port_reset)
 749                                 break;
 750                 }
 751                 cqe = ehea_poll_rq1(qp, &wqe_index);
 752         }
 753
 754         pr->rx_packets += processed;
 755         pr->rx_bytes += processed_bytes;
 756
 757         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 758         ehea_refill_rq2(pr, processed_rq2);
 759         ehea_refill_rq3(pr, processed_rq3);
 760
 761         return processed;
 762 }
 763
 764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 765
 766 static void reset_sq_restart_flag(struct ehea_port *port)
 767 {
 768         int i;
 769
 770         for (i = 0; i < port->num_def_qps; i++) {
 771                 struct ehea_port_res *pr = &port->port_res[i];
 772                 pr->sq_restart_flag = 0;
 773         }
 774         wake_up(&port->restart_wq);
 775 }
 776
 777 static void check_sqs(struct ehea_port *port)
 778 {
 779         struct ehea_swqe *swqe;
 780         int swqe_index;
 781         int i, k;
 782
 783         for (i = 0; i < port->num_def_qps; i++) {
 784                 struct ehea_port_res *pr = &port->port_res[i];
 785                 int ret;
 786                 k = 0;
 787                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 788                 memset(swqe, 0, SWQE_HEADER_SIZE);
 789                 atomic_dec(&pr->swqe_avail);
 790
 791                 swqe->tx_control |= EHEA_SWQE_PURGE;
 792                 swqe->wr_id = SWQE_RESTART_CHECK;
 793                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 794                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 795                 swqe->immediate_data_length = 80;
 796
 797                 ehea_post_swqe(pr->qp, swqe);
 798
 799                 ret = wait_event_timeout(port->restart_wq,
 800                                          pr->sq_restart_flag == 0,
 801                                          msecs_to_jiffies(100));
 802
 803                 if (!ret) {
 804                         pr_err("HW/SW queues out of sync\n");
 805                         ehea_schedule_port_reset(pr->port);
 806                         return;
 807                 }
 808         }
 809 }
 810
 811
 812 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 813 {
 814         struct sk_buff *skb;
 815         struct ehea_cq *send_cq = pr->send_cq;
 816         struct ehea_cqe *cqe;
 817         int quota = my_quota;
 818         int cqe_counter = 0;
 819         int swqe_av = 0;
 820         int index;
 821         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 822                                                 pr - &pr->port->port_res[0]);
 823
 824         cqe = ehea_poll_cq(send_cq);
 825         while (cqe && (quota > 0)) {
 826                 ehea_inc_cq(send_cq);
 827
 828                 cqe_counter++;
 829                 rmb();
 830
 831                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 832                         pr->sq_restart_flag = 1;
 833                         swqe_av++;
 834                         break;
 835                 }
 836
 837                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 838                         pr_err("Bad send completion status=0x%04X\n",
 839                                cqe->status);
 840
 841                         if (netif_msg_tx_err(pr->port))
 842                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 843
 844                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 845                                 pr_err("Resetting port\n");
 846                                 ehea_schedule_port_reset(pr->port);
 847                                 break;
 848                         }
 849                 }
 850
 851                 if (netif_msg_tx_done(pr->port))
 852                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 853
 854                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 855                            == EHEA_SWQE2_TYPE)) {
 856
 857                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 858                         skb = pr->sq_skba.arr[index];
 859                         dev_consume_skb_any(skb);
 860                         pr->sq_skba.arr[index] = NULL;
 861                 }
 862
 863                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 864                 quota--;
 865
 866                 cqe = ehea_poll_cq(send_cq);
 867         }
 868
 869         ehea_update_feca(send_cq, cqe_counter);
 870         atomic_add(swqe_av, &pr->swqe_avail);
 871
 872         if (unlikely(netif_tx_queue_stopped(txq) &&
 873                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 874                 __netif_tx_lock(txq, smp_processor_id());
 875                 if (netif_tx_queue_stopped(txq) &&
 876                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 877                         netif_tx_wake_queue(txq);
 878                 __netif_tx_unlock(txq);
 879         }
 880
 881         wake_up(&pr->port->swqe_avail_wq);
 882
 883         return cqe;
 884 }
 885
 886 #define EHEA_POLL_MAX_CQES 65535
 887
 888 static int ehea_poll(struct napi_struct *napi, int budget)
 889 {
 890         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 891                                                 napi);
 892         struct net_device *dev = pr->port->netdev;
 893         struct ehea_cqe *cqe;
 894         struct ehea_cqe *cqe_skb = NULL;
 895         int wqe_index;
 896         int rx = 0;
 897
 898         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 899         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 900
 901         while (rx != budget) {
 902                 napi_complete(napi);
 903                 ehea_reset_cq_ep(pr->recv_cq);
 904                 ehea_reset_cq_ep(pr->send_cq);
 905                 ehea_reset_cq_n1(pr->recv_cq);
 906                 ehea_reset_cq_n1(pr->send_cq);
 907                 rmb();
 908                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 909                 cqe_skb = ehea_poll_cq(pr->send_cq);
 910
 911                 if (!cqe && !cqe_skb)
 912                         return rx;
 913
 914                 if (!napi_reschedule(napi))
 915                         return rx;
 916
 917                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 918                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 919         }
 920
 921         return rx;
 922 }
 923
 924 #ifdef CONFIG_NET_POLL_CONTROLLER
 925 static void ehea_netpoll(struct net_device *dev)
 926 {
 927         struct ehea_port *port = netdev_priv(dev);
 928         int i;
 929
 930         for (i = 0; i < port->num_def_qps; i++)
 931                 napi_schedule(&port->port_res[i].napi);
 932 }
 933 #endif
 934
 935 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 936 {
 937         struct ehea_port_res *pr = param;
 938
 939         napi_schedule(&pr->napi);
 940
 941         return IRQ_HANDLED;
 942 }
 943
 944 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 945 {
 946         struct ehea_port *port = param;
 947         struct ehea_eqe *eqe;
 948         struct ehea_qp *qp;
 949         u32 qp_token;
 950         u64 resource_type, aer, aerr;
 951         int reset_port = 0;
 952
 953         eqe = ehea_poll_eq(port->qp_eq);
 954
 955         while (eqe) {
 956                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 957                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 958                        eqe->entry, qp_token);
 959
 960                 qp = port->port_res[qp_token].qp;
 961
 962                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 963                                                 &aer, &aerr);
 964
 965                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 966                         if ((aer & EHEA_AER_RESET_MASK) ||
 967                             (aerr & EHEA_AERR_RESET_MASK))
 968                                  reset_port = 1;
 969                 } else
 970                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 971
 972                 eqe = ehea_poll_eq(port->qp_eq);
 973         }
 974
 975         if (reset_port) {
 976                 pr_err("Resetting port\n");
 977                 ehea_schedule_port_reset(port);
 978         }
 979
 980         return IRQ_HANDLED;
 981 }
 982
 983 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 984                                        int logical_port)
 985 {
 986         int i;
 987
 988         for (i = 0; i < EHEA_MAX_PORTS; i++)
 989                 if (adapter->port[i])
 990                         if (adapter->port[i]->logical_port_id == logical_port)
 991                                 return adapter->port[i];
 992         return NULL;
 993 }
 994
 995 int ehea_sense_port_attr(struct ehea_port *port)
 996 {
 997         int ret;
 998         u64 hret;
 999         struct hcp_ehea_port_cb0 *cb0;
1000
1001         /* may be called via ehea_neq_tasklet() */
1002         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1003         if (!cb0) {
1004                 pr_err("no mem for cb0\n");
1005                 ret = -ENOMEM;
1006                 goto out;
1007         }
1008
1009         hret = ehea_h_query_ehea_port(port->adapter->handle,
1010                                       port->logical_port_id, H_PORT_CB0,
1011                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1012                                       cb0);
1013         if (hret != H_SUCCESS) {
1014                 ret = -EIO;
1015                 goto out_free;
1016         }
1017
1018         /* MAC address */
1019         port->mac_addr = cb0->port_mac_addr << 16;
1020
1021         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1022                 ret = -EADDRNOTAVAIL;
1023                 goto out_free;
1024         }
1025
1026         /* Port speed */
1027         switch (cb0->port_speed) {
1028         case H_SPEED_10M_H:
1029                 port->port_speed = EHEA_SPEED_10M;
1030                 port->full_duplex = 0;
1031                 break;
1032         case H_SPEED_10M_F:
1033                 port->port_speed = EHEA_SPEED_10M;
1034                 port->full_duplex = 1;
1035                 break;
1036         case H_SPEED_100M_H:
1037                 port->port_speed = EHEA_SPEED_100M;
1038                 port->full_duplex = 0;
1039                 break;
1040         case H_SPEED_100M_F:
1041                 port->port_speed = EHEA_SPEED_100M;
1042                 port->full_duplex = 1;
1043                 break;
1044         case H_SPEED_1G_F:
1045                 port->port_speed = EHEA_SPEED_1G;
1046                 port->full_duplex = 1;
1047                 break;
1048         case H_SPEED_10G_F:
1049                 port->port_speed = EHEA_SPEED_10G;
1050                 port->full_duplex = 1;
1051                 break;
1052         default:
1053                 port->port_speed = 0;
1054                 port->full_duplex = 0;
1055                 break;
1056         }
1057
1058         port->autoneg = 1;
1059         port->num_mcs = cb0->num_default_qps;
1060
1061         /* Number of default QPs */
1062         if (use_mcs)
1063                 port->num_def_qps = cb0->num_default_qps;
1064         else
1065                 port->num_def_qps = 1;
1066
1067         if (!port->num_def_qps) {
1068                 ret = -EINVAL;
1069                 goto out_free;
1070         }
1071
1072         ret = 0;
1073 out_free:
1074         if (ret || netif_msg_probe(port))
1075                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1076         free_page((unsigned long)cb0);
1077 out:
1078         return ret;
1079 }
1080
1081 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1082 {
1083         struct hcp_ehea_port_cb4 *cb4;
1084         u64 hret;
1085         int ret = 0;
1086
1087         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1088         if (!cb4) {
1089                 pr_err("no mem for cb4\n");
1090                 ret = -ENOMEM;
1091                 goto out;
1092         }
1093
1094         cb4->port_speed = port_speed;
1095
1096         netif_carrier_off(port->netdev);
1097
1098         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1099                                        port->logical_port_id,
1100                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1101         if (hret == H_SUCCESS) {
1102                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1103
1104                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1105                                               port->logical_port_id,
1106                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1107                                               cb4);
1108                 if (hret == H_SUCCESS) {
1109                         switch (cb4->port_speed) {
1110                         case H_SPEED_10M_H:
1111                                 port->port_speed = EHEA_SPEED_10M;
1112                                 port->full_duplex = 0;
1113                                 break;
1114                         case H_SPEED_10M_F:
1115                                 port->port_speed = EHEA_SPEED_10M;
1116                                 port->full_duplex = 1;
1117                                 break;
1118                         case H_SPEED_100M_H:
1119                                 port->port_speed = EHEA_SPEED_100M;
1120                                 port->full_duplex = 0;
1121                                 break;
1122                         case H_SPEED_100M_F:
1123                                 port->port_speed = EHEA_SPEED_100M;
1124                                 port->full_duplex = 1;
1125                                 break;
1126                         case H_SPEED_1G_F:
1127                                 port->port_speed = EHEA_SPEED_1G;
1128                                 port->full_duplex = 1;
1129                                 break;
1130                         case H_SPEED_10G_F:
1131                                 port->port_speed = EHEA_SPEED_10G;
1132                                 port->full_duplex = 1;
1133                                 break;
1134                         default:
1135                                 port->port_speed = 0;
1136                                 port->full_duplex = 0;
1137                                 break;
1138                         }
1139                 } else {
1140                         pr_err("Failed sensing port speed\n");
1141                         ret = -EIO;
1142                 }
1143         } else {
1144                 if (hret == H_AUTHORITY) {
1145                         pr_info("Hypervisor denied setting port speed\n");
1146                         ret = -EPERM;
1147                 } else {
1148                         ret = -EIO;
1149                         pr_err("Failed setting port speed\n");
1150                 }
1151         }
1152         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1153                 netif_carrier_on(port->netdev);
1154
1155         free_page((unsigned long)cb4);
1156 out:
1157         return ret;
1158 }
1159
1160 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1161 {
1162         int ret;
1163         u8 ec;
1164         u8 portnum;
1165         struct ehea_port *port;
1166         struct net_device *dev;
1167
1168         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1169         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1170         port = ehea_get_port(adapter, portnum);
1171         if (!port) {
1172                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1173                 return;
1174         }
1175         dev = port->netdev;
1176
1177         switch (ec) {
1178         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1179
1180                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1181                         if (!netif_carrier_ok(dev)) {
1182                                 ret = ehea_sense_port_attr(port);
1183                                 if (ret) {
1184                                         netdev_err(dev, "failed resensing port attributes\n");
1185                                         break;
1186                                 }
1187
1188                                 netif_info(port, link, dev,
1189                                            "Logical port up: %dMbps %s Duplex\n",
1190                                            port->port_speed,
1191                                            port->full_duplex == 1 ?
1192                                            "Full" : "Half");
1193
1194                                 netif_carrier_on(dev);
1195                                 netif_wake_queue(dev);
1196                         }
1197                 } else
1198                         if (netif_carrier_ok(dev)) {
1199                                 netif_info(port, link, dev,
1200                                            "Logical port down\n");
1201                                 netif_carrier_off(dev);
1202                                 netif_tx_disable(dev);
1203                         }
1204
1205                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1206                         port->phy_link = EHEA_PHY_LINK_UP;
1207                         netif_info(port, link, dev,
1208                                    "Physical port up\n");
1209                         if (prop_carrier_state)
1210                                 netif_carrier_on(dev);
1211                 } else {
1212                         port->phy_link = EHEA_PHY_LINK_DOWN;
1213                         netif_info(port, link, dev,
1214                                    "Physical port down\n");
1215                         if (prop_carrier_state)
1216                                 netif_carrier_off(dev);
1217                 }
1218
1219                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1220                         netdev_info(dev,
1221                                     "External switch port is primary port\n");
1222                 else
1223                         netdev_info(dev,
1224                                     "External switch port is backup port\n");
1225
1226                 break;
1227         case EHEA_EC_ADAPTER_MALFUNC:
1228                 netdev_err(dev, "Adapter malfunction\n");
1229                 break;
1230         case EHEA_EC_PORT_MALFUNC:
1231                 netdev_info(dev, "Port malfunction\n");
1232                 netif_carrier_off(dev);
1233                 netif_tx_disable(dev);
1234                 break;
1235         default:
1236                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1237                 break;
1238         }
1239 }
1240
1241 static void ehea_neq_tasklet(unsigned long data)
1242 {
1243         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1244         struct ehea_eqe *eqe;
1245         u64 event_mask;
1246
1247         eqe = ehea_poll_eq(adapter->neq);
1248         pr_debug("eqe=%p\n", eqe);
1249
1250         while (eqe) {
1251                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1252                 ehea_parse_eqe(adapter, eqe->entry);
1253                 eqe = ehea_poll_eq(adapter->neq);
1254                 pr_debug("next eqe=%p\n", eqe);
1255         }
1256
1257         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1258                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1259                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1260
1261         ehea_h_reset_events(adapter->handle,
1262                             adapter->neq->fw_handle, event_mask);
1263 }
1264
1265 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1266 {
1267         struct ehea_adapter *adapter = param;
1268         tasklet_hi_schedule(&adapter->neq_tasklet);
1269         return IRQ_HANDLED;
1270 }
1271
1272
1273 static int ehea_fill_port_res(struct ehea_port_res *pr)
1274 {
1275         int ret;
1276         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1277
1278         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1279
1280         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1281
1282         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1283
1284         return ret;
1285 }
1286
1287 static int ehea_reg_interrupts(struct net_device *dev)
1288 {
1289         struct ehea_port *port = netdev_priv(dev);
1290         struct ehea_port_res *pr;
1291         int i, ret;
1292
1293
1294         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1295                  dev->name);
1296
1297         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1298                                   ehea_qp_aff_irq_handler,
1299                                   0, port->int_aff_name, port);
1300         if (ret) {
1301                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1302                            port->qp_eq->attr.ist1);
1303                 goto out_free_qpeq;
1304         }
1305
1306         netif_info(port, ifup, dev,
1307                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1308                    port->qp_eq->attr.ist1);
1309
1310
1311         for (i = 0; i < port->num_def_qps; i++) {
1312                 pr = &port->port_res[i];
1313                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1314                          "%s-queue%d", dev->name, i);
1315                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1316                                           ehea_recv_irq_handler,
1317                                           0, pr->int_send_name, pr);
1318                 if (ret) {
1319                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1320                                    i, pr->eq->attr.ist1);
1321                         goto out_free_req;
1322                 }
1323                 netif_info(port, ifup, dev,
1324                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1325                            pr->eq->attr.ist1, i);
1326         }
1327 out:
1328         return ret;
1329
1330
1331 out_free_req:
1332         while (--i >= 0) {
1333                 u32 ist = port->port_res[i].eq->attr.ist1;
1334                 ibmebus_free_irq(ist, &port->port_res[i]);
1335         }
1336
1337 out_free_qpeq:
1338         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1339         i = port->num_def_qps;
1340
1341         goto out;
1342
1343 }
1344
1345 static void ehea_free_interrupts(struct net_device *dev)
1346 {
1347         struct ehea_port *port = netdev_priv(dev);
1348         struct ehea_port_res *pr;
1349         int i;
1350
1351         /* send */
1352
1353         for (i = 0; i < port->num_def_qps; i++) {
1354                 pr = &port->port_res[i];
1355                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1356                 netif_info(port, intr, dev,
1357                            "free send irq for res %d with handle 0x%X\n",
1358                            i, pr->eq->attr.ist1);
1359         }
1360
1361         /* associated events */
1362         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1363         netif_info(port, intr, dev,
1364                    "associated event interrupt for handle 0x%X freed\n",
1365                    port->qp_eq->attr.ist1);
1366 }
1367
1368 static int ehea_configure_port(struct ehea_port *port)
1369 {
1370         int ret, i;
1371         u64 hret, mask;
1372         struct hcp_ehea_port_cb0 *cb0;
1373
1374         ret = -ENOMEM;
1375         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1376         if (!cb0)
1377                 goto out;
1378
1379         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1380                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1381                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1382                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1383                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1384                                       PXLY_RC_VLAN_FILTER)
1385                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1386
1387         for (i = 0; i < port->num_mcs; i++)
1388                 if (use_mcs)
1389                         cb0->default_qpn_arr[i] =
1390                                 port->port_res[i].qp->init_attr.qp_nr;
1391                 else
1392                         cb0->default_qpn_arr[i] =
1393                                 port->port_res[0].qp->init_attr.qp_nr;
1394
1395         if (netif_msg_ifup(port))
1396                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1397
1398         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1399              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1400
1401         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1402                                        port->logical_port_id,
1403                                        H_PORT_CB0, mask, cb0);
1404         ret = -EIO;
1405         if (hret != H_SUCCESS)
1406                 goto out_free;
1407
1408         ret = 0;
1409
1410 out_free:
1411         free_page((unsigned long)cb0);
1412 out:
1413         return ret;
1414 }
1415
1416 static int ehea_gen_smrs(struct ehea_port_res *pr)
1417 {
1418         int ret;
1419         struct ehea_adapter *adapter = pr->port->adapter;
1420
1421         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1422         if (ret)
1423                 goto out;
1424
1425         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1426         if (ret)
1427                 goto out_free;
1428
1429         return 0;
1430
1431 out_free:
1432         ehea_rem_mr(&pr->send_mr);
1433 out:
1434         pr_err("Generating SMRS failed\n");
1435         return -EIO;
1436 }
1437
1438 static int ehea_rem_smrs(struct ehea_port_res *pr)
1439 {
1440         if ((ehea_rem_mr(&pr->send_mr)) ||
1441             (ehea_rem_mr(&pr->recv_mr)))
1442                 return -EIO;
1443         else
1444                 return 0;
1445 }
1446
1447 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1448 {
1449         int arr_size = sizeof(void *) * max_q_entries;
1450
1451         q_skba->arr = vzalloc(arr_size);
1452         if (!q_skba->arr)
1453                 return -ENOMEM;
1454
1455         q_skba->len = max_q_entries;
1456         q_skba->index = 0;
1457         q_skba->os_skbs = 0;
1458
1459         return 0;
1460 }
1461
1462 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1463                               struct port_res_cfg *pr_cfg, int queue_token)
1464 {
1465         struct ehea_adapter *adapter = port->adapter;
1466         enum ehea_eq_type eq_type = EHEA_EQ;
1467         struct ehea_qp_init_attr *init_attr = NULL;
1468         int ret = -EIO;
1469         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1470
1471         tx_bytes = pr->tx_bytes;
1472         tx_packets = pr->tx_packets;
1473         rx_bytes = pr->rx_bytes;
1474         rx_packets = pr->rx_packets;
1475
1476         memset(pr, 0, sizeof(struct ehea_port_res));
1477
1478         pr->tx_bytes = tx_bytes;
1479         pr->tx_packets = tx_packets;
1480         pr->rx_bytes = rx_bytes;
1481         pr->rx_packets = rx_packets;
1482
1483         pr->port = port;
1484
1485         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1486         if (!pr->eq) {
1487                 pr_err("create_eq failed (eq)\n");
1488                 goto out_free;
1489         }
1490
1491         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1492                                      pr->eq->fw_handle,
1493                                      port->logical_port_id);
1494         if (!pr->recv_cq) {
1495                 pr_err("create_cq failed (cq_recv)\n");
1496                 goto out_free;
1497         }
1498
1499         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1500                                      pr->eq->fw_handle,
1501                                      port->logical_port_id);
1502         if (!pr->send_cq) {
1503                 pr_err("create_cq failed (cq_send)\n");
1504                 goto out_free;
1505         }
1506
1507         if (netif_msg_ifup(port))
1508                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1509                         pr->send_cq->attr.act_nr_of_cqes,
1510                         pr->recv_cq->attr.act_nr_of_cqes);
1511
1512         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1513         if (!init_attr) {
1514                 ret = -ENOMEM;
1515                 pr_err("no mem for ehea_qp_init_attr\n");
1516                 goto out_free;
1517         }
1518
1519         init_attr->low_lat_rq1 = 1;
1520         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1521         init_attr->rq_count = 3;
1522         init_attr->qp_token = queue_token;
1523         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1524         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1525         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1526         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1527         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1528         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1529         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1530         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1531         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1532         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1533         init_attr->port_nr = port->logical_port_id;
1534         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1535         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1536         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1537
1538         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1539         if (!pr->qp) {
1540                 pr_err("create_qp failed\n");
1541                 ret = -EIO;
1542                 goto out_free;
1543         }
1544
1545         if (netif_msg_ifup(port))
1546                 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",
1547                         init_attr->qp_nr,
1548                         init_attr->act_nr_send_wqes,
1549                         init_attr->act_nr_rwqes_rq1,
1550                         init_attr->act_nr_rwqes_rq2,
1551                         init_attr->act_nr_rwqes_rq3);
1552
1553         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1554
1555         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1556         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1557         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1558         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1559         if (ret)
1560                 goto out_free;
1561
1562         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1563         if (ehea_gen_smrs(pr) != 0) {
1564                 ret = -EIO;
1565                 goto out_free;
1566         }
1567
1568         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1569
1570         kfree(init_attr);
1571
1572         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1573
1574         ret = 0;
1575         goto out;
1576
1577 out_free:
1578         kfree(init_attr);
1579         vfree(pr->sq_skba.arr);
1580         vfree(pr->rq1_skba.arr);
1581         vfree(pr->rq2_skba.arr);
1582         vfree(pr->rq3_skba.arr);
1583         ehea_destroy_qp(pr->qp);
1584         ehea_destroy_cq(pr->send_cq);
1585         ehea_destroy_cq(pr->recv_cq);
1586         ehea_destroy_eq(pr->eq);
1587 out:
1588         return ret;
1589 }
1590
1591 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1592 {
1593         int ret, i;
1594
1595         if (pr->qp)
1596                 netif_napi_del(&pr->napi);
1597
1598         ret = ehea_destroy_qp(pr->qp);
1599
1600         if (!ret) {
1601                 ehea_destroy_cq(pr->send_cq);
1602                 ehea_destroy_cq(pr->recv_cq);
1603                 ehea_destroy_eq(pr->eq);
1604
1605                 for (i = 0; i < pr->rq1_skba.len; i++)
1606                         if (pr->rq1_skba.arr[i])
1607                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1608
1609                 for (i = 0; i < pr->rq2_skba.len; i++)
1610                         if (pr->rq2_skba.arr[i])
1611                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1612
1613                 for (i = 0; i < pr->rq3_skba.len; i++)
1614                         if (pr->rq3_skba.arr[i])
1615                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1616
1617                 for (i = 0; i < pr->sq_skba.len; i++)
1618                         if (pr->sq_skba.arr[i])
1619                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1620
1621                 vfree(pr->rq1_skba.arr);
1622                 vfree(pr->rq2_skba.arr);
1623                 vfree(pr->rq3_skba.arr);
1624                 vfree(pr->sq_skba.arr);
1625                 ret = ehea_rem_smrs(pr);
1626         }
1627         return ret;
1628 }
1629
1630 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1631                                   u32 lkey)
1632 {
1633         int skb_data_size = skb_headlen(skb);
1634         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1635         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1636         unsigned int immediate_len = SWQE2_MAX_IMM;
1637
1638         swqe->descriptors = 0;
1639
1640         if (skb_is_gso(skb)) {
1641                 swqe->tx_control |= EHEA_SWQE_TSO;
1642                 swqe->mss = skb_shinfo(skb)->gso_size;
1643                 /*
1644                  * For TSO packets we only copy the headers into the
1645                  * immediate area.
1646                  */
1647                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1648         }
1649
1650         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1651                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1652                 swqe->immediate_data_length = immediate_len;
1653
1654                 if (skb_data_size > immediate_len) {
1655                         sg1entry->l_key = lkey;
1656                         sg1entry->len = skb_data_size - immediate_len;
1657                         sg1entry->vaddr =
1658                                 ehea_map_vaddr(skb->data + immediate_len);
1659                         swqe->descriptors++;
1660                 }
1661         } else {
1662                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1663                 swqe->immediate_data_length = skb_data_size;
1664         }
1665 }
1666
1667 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1668                                     struct ehea_swqe *swqe, u32 lkey)
1669 {
1670         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1671         skb_frag_t *frag;
1672         int nfrags, sg1entry_contains_frag_data, i;
1673
1674         nfrags = skb_shinfo(skb)->nr_frags;
1675         sg1entry = &swqe->u.immdata_desc.sg_entry;
1676         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1677         sg1entry_contains_frag_data = 0;
1678
1679         write_swqe2_immediate(skb, swqe, lkey);
1680
1681         /* write descriptors */
1682         if (nfrags > 0) {
1683                 if (swqe->descriptors == 0) {
1684                         /* sg1entry not yet used */
1685                         frag = &skb_shinfo(skb)->frags[0];
1686
1687                         /* copy sg1entry data */
1688                         sg1entry->l_key = lkey;
1689                         sg1entry->len = skb_frag_size(frag);
1690                         sg1entry->vaddr =
1691                                 ehea_map_vaddr(skb_frag_address(frag));
1692                         swqe->descriptors++;
1693                         sg1entry_contains_frag_data = 1;
1694                 }
1695
1696                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1697
1698                         frag = &skb_shinfo(skb)->frags[i];
1699                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1700
1701                         sgentry->l_key = lkey;
1702                         sgentry->len = skb_frag_size(frag);
1703                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1704                         swqe->descriptors++;
1705                 }
1706         }
1707 }
1708
1709 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1710 {
1711         int ret = 0;
1712         u64 hret;
1713         u8 reg_type;
1714
1715         /* De/Register untagged packets */
1716         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1717         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1718                                      port->logical_port_id,
1719                                      reg_type, port->mac_addr, 0, hcallid);
1720         if (hret != H_SUCCESS) {
1721                 pr_err("%sregistering bc address failed (tagged)\n",
1722                        hcallid == H_REG_BCMC ? "" : "de");
1723                 ret = -EIO;
1724                 goto out_herr;
1725         }
1726
1727         /* De/Register VLAN packets */
1728         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1729         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1730                                      port->logical_port_id,
1731                                      reg_type, port->mac_addr, 0, hcallid);
1732         if (hret != H_SUCCESS) {
1733                 pr_err("%sregistering bc address failed (vlan)\n",
1734                        hcallid == H_REG_BCMC ? "" : "de");
1735                 ret = -EIO;
1736         }
1737 out_herr:
1738         return ret;
1739 }
1740
1741 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1742 {
1743         struct ehea_port *port = netdev_priv(dev);
1744         struct sockaddr *mac_addr = sa;
1745         struct hcp_ehea_port_cb0 *cb0;
1746         int ret;
1747         u64 hret;
1748
1749         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1750                 ret = -EADDRNOTAVAIL;
1751                 goto out;
1752         }
1753
1754         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1755         if (!cb0) {
1756                 pr_err("no mem for cb0\n");
1757                 ret = -ENOMEM;
1758                 goto out;
1759         }
1760
1761         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1762
1763         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1764
1765         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1766                                        port->logical_port_id, H_PORT_CB0,
1767                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1768         if (hret != H_SUCCESS) {
1769                 ret = -EIO;
1770                 goto out_free;
1771         }
1772
1773         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1774
1775         /* Deregister old MAC in pHYP */
1776         if (port->state == EHEA_PORT_UP) {
1777                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1778                 if (ret)
1779                         goto out_upregs;
1780         }
1781
1782         port->mac_addr = cb0->port_mac_addr << 16;
1783
1784         /* Register new MAC in pHYP */
1785         if (port->state == EHEA_PORT_UP) {
1786                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1787                 if (ret)
1788                         goto out_upregs;
1789         }
1790
1791         ret = 0;
1792
1793 out_upregs:
1794         ehea_update_bcmc_registrations();
1795 out_free:
1796         free_page((unsigned long)cb0);
1797 out:
1798         return ret;
1799 }
1800
1801 static void ehea_promiscuous_error(u64 hret, int enable)
1802 {
1803         if (hret == H_AUTHORITY)
1804                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1805                         enable == 1 ? "en" : "dis");
1806         else
1807                 pr_err("failed %sabling promiscuous mode\n",
1808                        enable == 1 ? "en" : "dis");
1809 }
1810
1811 static void ehea_promiscuous(struct net_device *dev, int enable)
1812 {
1813         struct ehea_port *port = netdev_priv(dev);
1814         struct hcp_ehea_port_cb7 *cb7;
1815         u64 hret;
1816
1817         if (enable == port->promisc)
1818                 return;
1819
1820         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1821         if (!cb7) {
1822                 pr_err("no mem for cb7\n");
1823                 goto out;
1824         }
1825
1826         /* Modify Pxs_DUCQPN in CB7 */
1827         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1828
1829         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1830                                        port->logical_port_id,
1831                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1832         if (hret) {
1833                 ehea_promiscuous_error(hret, enable);
1834                 goto out;
1835         }
1836
1837         port->promisc = enable;
1838 out:
1839         free_page((unsigned long)cb7);
1840 }
1841
1842 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1843                                      u32 hcallid)
1844 {
1845         u64 hret;
1846         u8 reg_type;
1847
1848         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1849         if (mc_mac_addr == 0)
1850                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1851
1852         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853                                      port->logical_port_id,
1854                                      reg_type, mc_mac_addr, 0, hcallid);
1855         if (hret)
1856                 goto out;
1857
1858         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1859         if (mc_mac_addr == 0)
1860                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1861
1862         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1863                                      port->logical_port_id,
1864                                      reg_type, mc_mac_addr, 0, hcallid);
1865 out:
1866         return hret;
1867 }
1868
1869 static int ehea_drop_multicast_list(struct net_device *dev)
1870 {
1871         struct ehea_port *port = netdev_priv(dev);
1872         struct ehea_mc_list *mc_entry = port->mc_list;
1873         struct list_head *pos;
1874         struct list_head *temp;
1875         int ret = 0;
1876         u64 hret;
1877
1878         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1879                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1880
1881                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1882                                                  H_DEREG_BCMC);
1883                 if (hret) {
1884                         pr_err("failed deregistering mcast MAC\n");
1885                         ret = -EIO;
1886                 }
1887
1888                 list_del(pos);
1889                 kfree(mc_entry);
1890         }
1891         return ret;
1892 }
1893
1894 static void ehea_allmulti(struct net_device *dev, int enable)
1895 {
1896         struct ehea_port *port = netdev_priv(dev);
1897         u64 hret;
1898
1899         if (!port->allmulti) {
1900                 if (enable) {
1901                         /* Enable ALLMULTI */
1902                         ehea_drop_multicast_list(dev);
1903                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1904                         if (!hret)
1905                                 port->allmulti = 1;
1906                         else
1907                                 netdev_err(dev,
1908                                            "failed enabling IFF_ALLMULTI\n");
1909                 }
1910         } else {
1911                 if (!enable) {
1912                         /* Disable ALLMULTI */
1913                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1914                         if (!hret)
1915                                 port->allmulti = 0;
1916                         else
1917                                 netdev_err(dev,
1918                                            "failed disabling IFF_ALLMULTI\n");
1919                 }
1920         }
1921 }
1922
1923 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1924 {
1925         struct ehea_mc_list *ehea_mcl_entry;
1926         u64 hret;
1927
1928         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1929         if (!ehea_mcl_entry)
1930                 return;
1931
1932         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1933
1934         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1935
1936         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1937                                          H_REG_BCMC);
1938         if (!hret)
1939                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1940         else {
1941                 pr_err("failed registering mcast MAC\n");
1942                 kfree(ehea_mcl_entry);
1943         }
1944 }
1945
1946 static void ehea_set_multicast_list(struct net_device *dev)
1947 {
1948         struct ehea_port *port = netdev_priv(dev);
1949         struct netdev_hw_addr *ha;
1950         int ret;
1951
1952         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1953
1954         if (dev->flags & IFF_ALLMULTI) {
1955                 ehea_allmulti(dev, 1);
1956                 goto out;
1957         }
1958         ehea_allmulti(dev, 0);
1959
1960         if (!netdev_mc_empty(dev)) {
1961                 ret = ehea_drop_multicast_list(dev);
1962                 if (ret) {
1963                         /* Dropping the current multicast list failed.
1964                          * Enabling ALL_MULTI is the best we can do.
1965                          */
1966                         ehea_allmulti(dev, 1);
1967                 }
1968
1969                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1970                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1971                                 port->adapter->max_mc_mac);
1972                         goto out;
1973                 }
1974
1975                 netdev_for_each_mc_addr(ha, dev)
1976                         ehea_add_multicast_entry(port, ha->addr);
1977
1978         }
1979 out:
1980         ehea_update_bcmc_registrations();
1981 }
1982
1983 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1984 {
1985         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1986
1987         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1988                 return;
1989
1990         if (skb->ip_summed == CHECKSUM_PARTIAL)
1991                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1992
1993         swqe->ip_start = skb_network_offset(skb);
1994         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1995
1996         switch (ip_hdr(skb)->protocol) {
1997         case IPPROTO_UDP:
1998                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1999                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2000
2001                 swqe->tcp_offset = swqe->ip_end + 1 +
2002                                    offsetof(struct udphdr, check);
2003                 break;
2004
2005         case IPPROTO_TCP:
2006                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2007                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2008
2009                 swqe->tcp_offset = swqe->ip_end + 1 +
2010                                    offsetof(struct tcphdr, check);
2011                 break;
2012         }
2013 }
2014
2015 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2016                        struct ehea_swqe *swqe, u32 lkey)
2017 {
2018         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2019
2020         xmit_common(skb, swqe);
2021
2022         write_swqe2_data(skb, dev, swqe, lkey);
2023 }
2024
2025 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2026                        struct ehea_swqe *swqe)
2027 {
2028         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2029
2030         xmit_common(skb, swqe);
2031
2032         if (!skb->data_len)
2033                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2034         else
2035                 skb_copy_bits(skb, 0, imm_data, skb->len);
2036
2037         swqe->immediate_data_length = skb->len;
2038         dev_consume_skb_any(skb);
2039 }
2040
2041 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2042 {
2043         struct ehea_port *port = netdev_priv(dev);
2044         struct ehea_swqe *swqe;
2045         u32 lkey;
2046         int swqe_index;
2047         struct ehea_port_res *pr;
2048         struct netdev_queue *txq;
2049
2050         pr = &port->port_res[skb_get_queue_mapping(skb)];
2051         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2052
2053         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2054         memset(swqe, 0, SWQE_HEADER_SIZE);
2055         atomic_dec(&pr->swqe_avail);
2056
2057         if (skb_vlan_tag_present(skb)) {
2058                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2059                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2060         }
2061
2062         pr->tx_packets++;
2063         pr->tx_bytes += skb->len;
2064
2065         if (skb->len <= SWQE3_MAX_IMM) {
2066                 u32 sig_iv = port->sig_comp_iv;
2067                 u32 swqe_num = pr->swqe_id_counter;
2068                 ehea_xmit3(skb, dev, swqe);
2069                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2070                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2071                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2072                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2073                                                       sig_iv);
2074                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2075                         pr->swqe_ll_count = 0;
2076                 } else
2077                         pr->swqe_ll_count += 1;
2078         } else {
2079                 swqe->wr_id =
2080                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2081                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2082                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2083                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2084                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2085
2086                 pr->sq_skba.index++;
2087                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2088
2089                 lkey = pr->send_mr.lkey;
2090                 ehea_xmit2(skb, dev, swqe, lkey);
2091                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2092         }
2093         pr->swqe_id_counter += 1;
2094
2095         netif_info(port, tx_queued, dev,
2096                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2097         if (netif_msg_tx_queued(port))
2098                 ehea_dump(swqe, 512, "swqe");
2099
2100         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2101                 netif_tx_stop_queue(txq);
2102                 swqe->tx_control |= EHEA_SWQE_PURGE;
2103         }
2104
2105         ehea_post_swqe(pr->qp, swqe);
2106
2107         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2108                 pr->p_stats.queue_stopped++;
2109                 netif_tx_stop_queue(txq);
2110         }
2111
2112         return NETDEV_TX_OK;
2113 }
2114
2115 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2116 {
2117         struct ehea_port *port = netdev_priv(dev);
2118         struct ehea_adapter *adapter = port->adapter;
2119         struct hcp_ehea_port_cb1 *cb1;
2120         int index;
2121         u64 hret;
2122         int err = 0;
2123
2124         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125         if (!cb1) {
2126                 pr_err("no mem for cb1\n");
2127                 err = -ENOMEM;
2128                 goto out;
2129         }
2130
2131         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2132                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2133         if (hret != H_SUCCESS) {
2134                 pr_err("query_ehea_port failed\n");
2135                 err = -EINVAL;
2136                 goto out;
2137         }
2138
2139         index = (vid / 64);
2140         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2141
2142         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2143                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2144         if (hret != H_SUCCESS) {
2145                 pr_err("modify_ehea_port failed\n");
2146                 err = -EINVAL;
2147         }
2148 out:
2149         free_page((unsigned long)cb1);
2150         return err;
2151 }
2152
2153 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2154 {
2155         struct ehea_port *port = netdev_priv(dev);
2156         struct ehea_adapter *adapter = port->adapter;
2157         struct hcp_ehea_port_cb1 *cb1;
2158         int index;
2159         u64 hret;
2160         int err = 0;
2161
2162         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2163         if (!cb1) {
2164                 pr_err("no mem for cb1\n");
2165                 err = -ENOMEM;
2166                 goto out;
2167         }
2168
2169         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2170                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2171         if (hret != H_SUCCESS) {
2172                 pr_err("query_ehea_port failed\n");
2173                 err = -EINVAL;
2174                 goto out;
2175         }
2176
2177         index = (vid / 64);
2178         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2179
2180         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2181                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2182         if (hret != H_SUCCESS) {
2183                 pr_err("modify_ehea_port failed\n");
2184                 err = -EINVAL;
2185         }
2186 out:
2187         free_page((unsigned long)cb1);
2188         return err;
2189 }
2190
2191 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2192 {
2193         int ret = -EIO;
2194         u64 hret;
2195         u16 dummy16 = 0;
2196         u64 dummy64 = 0;
2197         struct hcp_modify_qp_cb0 *cb0;
2198
2199         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2200         if (!cb0) {
2201                 ret = -ENOMEM;
2202                 goto out;
2203         }
2204
2205         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2206                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2207         if (hret != H_SUCCESS) {
2208                 pr_err("query_ehea_qp failed (1)\n");
2209                 goto out;
2210         }
2211
2212         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2213         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2214                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2215                                      &dummy64, &dummy64, &dummy16, &dummy16);
2216         if (hret != H_SUCCESS) {
2217                 pr_err("modify_ehea_qp failed (1)\n");
2218                 goto out;
2219         }
2220
2221         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2222                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2223         if (hret != H_SUCCESS) {
2224                 pr_err("query_ehea_qp failed (2)\n");
2225                 goto out;
2226         }
2227
2228         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2229         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2230                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2231                                      &dummy64, &dummy64, &dummy16, &dummy16);
2232         if (hret != H_SUCCESS) {
2233                 pr_err("modify_ehea_qp failed (2)\n");
2234                 goto out;
2235         }
2236
2237         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2238                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2239         if (hret != H_SUCCESS) {
2240                 pr_err("query_ehea_qp failed (3)\n");
2241                 goto out;
2242         }
2243
2244         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2245         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2246                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2247                                      &dummy64, &dummy64, &dummy16, &dummy16);
2248         if (hret != H_SUCCESS) {
2249                 pr_err("modify_ehea_qp failed (3)\n");
2250                 goto out;
2251         }
2252
2253         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2254                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2255         if (hret != H_SUCCESS) {
2256                 pr_err("query_ehea_qp failed (4)\n");
2257                 goto out;
2258         }
2259
2260         ret = 0;
2261 out:
2262         free_page((unsigned long)cb0);
2263         return ret;
2264 }
2265
2266 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2267 {
2268         int ret, i;
2269         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2270         enum ehea_eq_type eq_type = EHEA_EQ;
2271
2272         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2273                                    EHEA_MAX_ENTRIES_EQ, 1);
2274         if (!port->qp_eq) {
2275                 ret = -EINVAL;
2276                 pr_err("ehea_create_eq failed (qp_eq)\n");
2277                 goto out_kill_eq;
2278         }
2279
2280         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2281         pr_cfg.max_entries_scq = sq_entries * 2;
2282         pr_cfg.max_entries_sq = sq_entries;
2283         pr_cfg.max_entries_rq1 = rq1_entries;
2284         pr_cfg.max_entries_rq2 = rq2_entries;
2285         pr_cfg.max_entries_rq3 = rq3_entries;
2286
2287         pr_cfg_small_rx.max_entries_rcq = 1;
2288         pr_cfg_small_rx.max_entries_scq = sq_entries;
2289         pr_cfg_small_rx.max_entries_sq = sq_entries;
2290         pr_cfg_small_rx.max_entries_rq1 = 1;
2291         pr_cfg_small_rx.max_entries_rq2 = 1;
2292         pr_cfg_small_rx.max_entries_rq3 = 1;
2293
2294         for (i = 0; i < def_qps; i++) {
2295                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2296                 if (ret)
2297                         goto out_clean_pr;
2298         }
2299         for (i = def_qps; i < def_qps; i++) {
2300                 ret = ehea_init_port_res(port, &port->port_res[i],
2301                                          &pr_cfg_small_rx, i);
2302                 if (ret)
2303                         goto out_clean_pr;
2304         }
2305
2306         return 0;
2307
2308 out_clean_pr:
2309         while (--i >= 0)
2310                 ehea_clean_portres(port, &port->port_res[i]);
2311
2312 out_kill_eq:
2313         ehea_destroy_eq(port->qp_eq);
2314         return ret;
2315 }
2316
2317 static int ehea_clean_all_portres(struct ehea_port *port)
2318 {
2319         int ret = 0;
2320         int i;
2321
2322         for (i = 0; i < port->num_def_qps; i++)
2323                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2324
2325         ret |= ehea_destroy_eq(port->qp_eq);
2326
2327         return ret;
2328 }
2329
2330 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2331 {
2332         if (adapter->active_ports)
2333                 return;
2334
2335         ehea_rem_mr(&adapter->mr);
2336 }
2337
2338 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2339 {
2340         if (adapter->active_ports)
2341                 return 0;
2342
2343         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2344 }
2345
2346 static int ehea_up(struct net_device *dev)
2347 {
2348         int ret, i;
2349         struct ehea_port *port = netdev_priv(dev);
2350
2351         if (port->state == EHEA_PORT_UP)
2352                 return 0;
2353
2354         ret = ehea_port_res_setup(port, port->num_def_qps);
2355         if (ret) {
2356                 netdev_err(dev, "port_res_failed\n");
2357                 goto out;
2358         }
2359
2360         /* Set default QP for this port */
2361         ret = ehea_configure_port(port);
2362         if (ret) {
2363                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2364                 goto out_clean_pr;
2365         }
2366
2367         ret = ehea_reg_interrupts(dev);
2368         if (ret) {
2369                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2370                 goto out_clean_pr;
2371         }
2372
2373         for (i = 0; i < port->num_def_qps; i++) {
2374                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2375                 if (ret) {
2376                         netdev_err(dev, "activate_qp failed\n");
2377                         goto out_free_irqs;
2378                 }
2379         }
2380
2381         for (i = 0; i < port->num_def_qps; i++) {
2382                 ret = ehea_fill_port_res(&port->port_res[i]);
2383                 if (ret) {
2384                         netdev_err(dev, "out_free_irqs\n");
2385                         goto out_free_irqs;
2386                 }
2387         }
2388
2389         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2390         if (ret) {
2391                 ret = -EIO;
2392                 goto out_free_irqs;
2393         }
2394
2395         port->state = EHEA_PORT_UP;
2396
2397         ret = 0;
2398         goto out;
2399
2400 out_free_irqs:
2401         ehea_free_interrupts(dev);
2402
2403 out_clean_pr:
2404         ehea_clean_all_portres(port);
2405 out:
2406         if (ret)
2407                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2408
2409         ehea_update_bcmc_registrations();
2410         ehea_update_firmware_handles();
2411
2412         return ret;
2413 }
2414
2415 static void port_napi_disable(struct ehea_port *port)
2416 {
2417         int i;
2418
2419         for (i = 0; i < port->num_def_qps; i++)
2420                 napi_disable(&port->port_res[i].napi);
2421 }
2422
2423 static void port_napi_enable(struct ehea_port *port)
2424 {
2425         int i;
2426
2427         for (i = 0; i < port->num_def_qps; i++)
2428                 napi_enable(&port->port_res[i].napi);
2429 }
2430
2431 static int ehea_open(struct net_device *dev)
2432 {
2433         int ret;
2434         struct ehea_port *port = netdev_priv(dev);
2435
2436         mutex_lock(&port->port_lock);
2437
2438         netif_info(port, ifup, dev, "enabling port\n");
2439
2440         netif_carrier_off(dev);
2441
2442         ret = ehea_up(dev);
2443         if (!ret) {
2444                 port_napi_enable(port);
2445                 netif_tx_start_all_queues(dev);
2446         }
2447
2448         mutex_unlock(&port->port_lock);
2449         schedule_delayed_work(&port->stats_work,
2450                               round_jiffies_relative(msecs_to_jiffies(1000)));
2451
2452         return ret;
2453 }
2454
2455 static int ehea_down(struct net_device *dev)
2456 {
2457         int ret;
2458         struct ehea_port *port = netdev_priv(dev);
2459
2460         if (port->state == EHEA_PORT_DOWN)
2461                 return 0;
2462
2463         ehea_drop_multicast_list(dev);
2464         ehea_allmulti(dev, 0);
2465         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2466
2467         ehea_free_interrupts(dev);
2468
2469         port->state = EHEA_PORT_DOWN;
2470
2471         ehea_update_bcmc_registrations();
2472
2473         ret = ehea_clean_all_portres(port);
2474         if (ret)
2475                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2476
2477         ehea_update_firmware_handles();
2478
2479         return ret;
2480 }
2481
2482 static int ehea_stop(struct net_device *dev)
2483 {
2484         int ret;
2485         struct ehea_port *port = netdev_priv(dev);
2486
2487         netif_info(port, ifdown, dev, "disabling port\n");
2488
2489         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2490         cancel_work_sync(&port->reset_task);
2491         cancel_delayed_work_sync(&port->stats_work);
2492         mutex_lock(&port->port_lock);
2493         netif_tx_stop_all_queues(dev);
2494         port_napi_disable(port);
2495         ret = ehea_down(dev);
2496         mutex_unlock(&port->port_lock);
2497         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2498         return ret;
2499 }
2500
2501 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2502 {
2503         struct ehea_qp qp = *orig_qp;
2504         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2505         struct ehea_swqe *swqe;
2506         int wqe_index;
2507         int i;
2508
2509         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2510                 swqe = ehea_get_swqe(&qp, &wqe_index);
2511                 swqe->tx_control |= EHEA_SWQE_PURGE;
2512         }
2513 }
2514
2515 static void ehea_flush_sq(struct ehea_port *port)
2516 {
2517         int i;
2518
2519         for (i = 0; i < port->num_def_qps; i++) {
2520                 struct ehea_port_res *pr = &port->port_res[i];
2521                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2522                 int ret;
2523
2524                 ret = wait_event_timeout(port->swqe_avail_wq,
2525                          atomic_read(&pr->swqe_avail) >= swqe_max,
2526                          msecs_to_jiffies(100));
2527
2528                 if (!ret) {
2529                         pr_err("WARNING: sq not flushed completely\n");
2530                         break;
2531                 }
2532         }
2533 }
2534
2535 static int ehea_stop_qps(struct net_device *dev)
2536 {
2537         struct ehea_port *port = netdev_priv(dev);
2538         struct ehea_adapter *adapter = port->adapter;
2539         struct hcp_modify_qp_cb0 *cb0;
2540         int ret = -EIO;
2541         int dret;
2542         int i;
2543         u64 hret;
2544         u64 dummy64 = 0;
2545         u16 dummy16 = 0;
2546
2547         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2548         if (!cb0) {
2549                 ret = -ENOMEM;
2550                 goto out;
2551         }
2552
2553         for (i = 0; i < (port->num_def_qps); i++) {
2554                 struct ehea_port_res *pr =  &port->port_res[i];
2555                 struct ehea_qp *qp = pr->qp;
2556
2557                 /* Purge send queue */
2558                 ehea_purge_sq(qp);
2559
2560                 /* Disable queue pair */
2561                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2563                                             cb0);
2564                 if (hret != H_SUCCESS) {
2565                         pr_err("query_ehea_qp failed (1)\n");
2566                         goto out;
2567                 }
2568
2569                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2570                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2571
2572                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2573                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2574                                                             1), cb0, &dummy64,
2575                                              &dummy64, &dummy16, &dummy16);
2576                 if (hret != H_SUCCESS) {
2577                         pr_err("modify_ehea_qp failed (1)\n");
2578                         goto out;
2579                 }
2580
2581                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2582                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2583                                             cb0);
2584                 if (hret != H_SUCCESS) {
2585                         pr_err("query_ehea_qp failed (2)\n");
2586                         goto out;
2587                 }
2588
2589                 /* deregister shared memory regions */
2590                 dret = ehea_rem_smrs(pr);
2591                 if (dret) {
2592                         pr_err("unreg shared memory region failed\n");
2593                         goto out;
2594                 }
2595         }
2596
2597         ret = 0;
2598 out:
2599         free_page((unsigned long)cb0);
2600
2601         return ret;
2602 }
2603
2604 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2605 {
2606         struct ehea_qp qp = *orig_qp;
2607         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2608         struct ehea_rwqe *rwqe;
2609         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2610         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2611         struct sk_buff *skb;
2612         u32 lkey = pr->recv_mr.lkey;
2613
2614
2615         int i;
2616         int index;
2617
2618         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2619                 rwqe = ehea_get_next_rwqe(&qp, 2);
2620                 rwqe->sg_list[0].l_key = lkey;
2621                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2622                 skb = skba_rq2[index];
2623                 if (skb)
2624                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2625         }
2626
2627         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2628                 rwqe = ehea_get_next_rwqe(&qp, 3);
2629                 rwqe->sg_list[0].l_key = lkey;
2630                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2631                 skb = skba_rq3[index];
2632                 if (skb)
2633                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2634         }
2635 }
2636
2637 static int ehea_restart_qps(struct net_device *dev)
2638 {
2639         struct ehea_port *port = netdev_priv(dev);
2640         struct ehea_adapter *adapter = port->adapter;
2641         int ret = 0;
2642         int i;
2643
2644         struct hcp_modify_qp_cb0 *cb0;
2645         u64 hret;
2646         u64 dummy64 = 0;
2647         u16 dummy16 = 0;
2648
2649         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2650         if (!cb0)
2651                 return -ENOMEM;
2652
2653         for (i = 0; i < (port->num_def_qps); i++) {
2654                 struct ehea_port_res *pr =  &port->port_res[i];
2655                 struct ehea_qp *qp = pr->qp;
2656
2657                 ret = ehea_gen_smrs(pr);
2658                 if (ret) {
2659                         netdev_err(dev, "creation of shared memory regions failed\n");
2660                         goto out;
2661                 }
2662
2663                 ehea_update_rqs(qp, pr);
2664
2665                 /* Enable queue pair */
2666                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2667                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2668                                             cb0);
2669                 if (hret != H_SUCCESS) {
2670                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2671                         ret = -EFAULT;
2672                         goto out;
2673                 }
2674
2675                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2676                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2677
2678                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2679                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2680                                                             1), cb0, &dummy64,
2681                                              &dummy64, &dummy16, &dummy16);
2682                 if (hret != H_SUCCESS) {
2683                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2684                         ret = -EFAULT;
2685                         goto out;
2686                 }
2687
2688                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2690                                             cb0);
2691                 if (hret != H_SUCCESS) {
2692                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2693                         ret = -EFAULT;
2694                         goto out;
2695                 }
2696
2697                 /* refill entire queue */
2698                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2699                 ehea_refill_rq2(pr, 0);
2700                 ehea_refill_rq3(pr, 0);
2701         }
2702 out:
2703         free_page((unsigned long)cb0);
2704
2705         return ret;
2706 }
2707
2708 static void ehea_reset_port(struct work_struct *work)
2709 {
2710         int ret;
2711         struct ehea_port *port =
2712                 container_of(work, struct ehea_port, reset_task);
2713         struct net_device *dev = port->netdev;
2714
2715         mutex_lock(&dlpar_mem_lock);
2716         port->resets++;
2717         mutex_lock(&port->port_lock);
2718         netif_tx_disable(dev);
2719
2720         port_napi_disable(port);
2721
2722         ehea_down(dev);
2723
2724         ret = ehea_up(dev);
2725         if (ret)
2726                 goto out;
2727
2728         ehea_set_multicast_list(dev);
2729
2730         netif_info(port, timer, dev, "reset successful\n");
2731
2732         port_napi_enable(port);
2733
2734         netif_tx_wake_all_queues(dev);
2735 out:
2736         mutex_unlock(&port->port_lock);
2737         mutex_unlock(&dlpar_mem_lock);
2738 }
2739
2740 static void ehea_rereg_mrs(void)
2741 {
2742         int ret, i;
2743         struct ehea_adapter *adapter;
2744
2745         pr_info("LPAR memory changed - re-initializing driver\n");
2746
2747         list_for_each_entry(adapter, &adapter_list, list)
2748                 if (adapter->active_ports) {
2749                         /* Shutdown all ports */
2750                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2751                                 struct ehea_port *port = adapter->port[i];
2752                                 struct net_device *dev;
2753
2754                                 if (!port)
2755                                         continue;
2756
2757                                 dev = port->netdev;
2758
2759                                 if (dev->flags & IFF_UP) {
2760                                         mutex_lock(&port->port_lock);
2761                                         netif_tx_disable(dev);
2762                                         ehea_flush_sq(port);
2763                                         ret = ehea_stop_qps(dev);
2764                                         if (ret) {
2765                                                 mutex_unlock(&port->port_lock);
2766                                                 goto out;
2767                                         }
2768                                         port_napi_disable(port);
2769                                         mutex_unlock(&port->port_lock);
2770                                 }
2771                                 reset_sq_restart_flag(port);
2772                         }
2773
2774                         /* Unregister old memory region */
2775                         ret = ehea_rem_mr(&adapter->mr);
2776                         if (ret) {
2777                                 pr_err("unregister MR failed - driver inoperable!\n");
2778                                 goto out;
2779                         }
2780                 }
2781
2782         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2783
2784         list_for_each_entry(adapter, &adapter_list, list)
2785                 if (adapter->active_ports) {
2786                         /* Register new memory region */
2787                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2788                         if (ret) {
2789                                 pr_err("register MR failed - driver inoperable!\n");
2790                                 goto out;
2791                         }
2792
2793                         /* Restart all ports */
2794                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2795                                 struct ehea_port *port = adapter->port[i];
2796
2797                                 if (port) {
2798                                         struct net_device *dev = port->netdev;
2799
2800                                         if (dev->flags & IFF_UP) {
2801                                                 mutex_lock(&port->port_lock);
2802                                                 ret = ehea_restart_qps(dev);
2803                                                 if (!ret) {
2804                                                         check_sqs(port);
2805                                                         port_napi_enable(port);
2806                                                         netif_tx_wake_all_queues(dev);
2807                                                 } else {
2808                                                         netdev_err(dev, "Unable to restart QPS\n");
2809                                                 }
2810                                                 mutex_unlock(&port->port_lock);
2811                                         }
2812                                 }
2813                         }
2814                 }
2815         pr_info("re-initializing driver complete\n");
2816 out:
2817         return;
2818 }
2819
2820 static void ehea_tx_watchdog(struct net_device *dev)
2821 {
2822         struct ehea_port *port = netdev_priv(dev);
2823
2824         if (netif_carrier_ok(dev) &&
2825             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2826                 ehea_schedule_port_reset(port);
2827 }
2828
2829 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2830 {
2831         struct hcp_query_ehea *cb;
2832         u64 hret;
2833         int ret;
2834
2835         cb = (void *)get_zeroed_page(GFP_KERNEL);
2836         if (!cb) {
2837                 ret = -ENOMEM;
2838                 goto out;
2839         }
2840
2841         hret = ehea_h_query_ehea(adapter->handle, cb);
2842
2843         if (hret != H_SUCCESS) {
2844                 ret = -EIO;
2845                 goto out_herr;
2846         }
2847
2848         adapter->max_mc_mac = cb->max_mc_mac - 1;
2849         ret = 0;
2850
2851 out_herr:
2852         free_page((unsigned long)cb);
2853 out:
2854         return ret;
2855 }
2856
2857 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2858 {
2859         struct hcp_ehea_port_cb4 *cb4;
2860         u64 hret;
2861         int ret = 0;
2862
2863         *jumbo = 0;
2864
2865         /* (Try to) enable *jumbo frames */
2866         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2867         if (!cb4) {
2868                 pr_err("no mem for cb4\n");
2869                 ret = -ENOMEM;
2870                 goto out;
2871         } else {
2872                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2873                                               port->logical_port_id,
2874                                               H_PORT_CB4,
2875                                               H_PORT_CB4_JUMBO, cb4);
2876                 if (hret == H_SUCCESS) {
2877                         if (cb4->jumbo_frame)
2878                                 *jumbo = 1;
2879                         else {
2880                                 cb4->jumbo_frame = 1;
2881                                 hret = ehea_h_modify_ehea_port(port->adapter->
2882                                                                handle,
2883                                                                port->
2884                                                                logical_port_id,
2885                                                                H_PORT_CB4,
2886                                                                H_PORT_CB4_JUMBO,
2887                                                                cb4);
2888                                 if (hret == H_SUCCESS)
2889                                         *jumbo = 1;
2890                         }
2891                 } else
2892                         ret = -EINVAL;
2893
2894                 free_page((unsigned long)cb4);
2895         }
2896 out:
2897         return ret;
2898 }
2899
2900 static ssize_t ehea_show_port_id(struct device *dev,
2901                                  struct device_attribute *attr, char *buf)
2902 {
2903         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2904         return sprintf(buf, "%d", port->logical_port_id);
2905 }
2906
2907 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2908                    NULL);
2909
2910 static void logical_port_release(struct device *dev)
2911 {
2912         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2913         of_node_put(port->ofdev.dev.of_node);
2914 }
2915
2916 static struct device *ehea_register_port(struct ehea_port *port,
2917                                          struct device_node *dn)
2918 {
2919         int ret;
2920
2921         port->ofdev.dev.of_node = of_node_get(dn);
2922         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2923         port->ofdev.dev.bus = &ibmebus_bus_type;
2924
2925         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2926         port->ofdev.dev.release = logical_port_release;
2927
2928         ret = of_device_register(&port->ofdev);
2929         if (ret) {
2930                 pr_err("failed to register device. ret=%d\n", ret);
2931                 put_device(&port->ofdev.dev);
2932                 goto out;
2933         }
2934
2935         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2936         if (ret) {
2937                 pr_err("failed to register attributes, ret=%d\n", ret);
2938                 goto out_unreg_of_dev;
2939         }
2940
2941         return &port->ofdev.dev;
2942
2943 out_unreg_of_dev:
2944         of_device_unregister(&port->ofdev);
2945 out:
2946         return NULL;
2947 }
2948
2949 static void ehea_unregister_port(struct ehea_port *port)
2950 {
2951         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2952         of_device_unregister(&port->ofdev);
2953 }
2954
2955 static const struct net_device_ops ehea_netdev_ops = {
2956         .ndo_open               = ehea_open,
2957         .ndo_stop               = ehea_stop,
2958         .ndo_start_xmit         = ehea_start_xmit,
2959 #ifdef CONFIG_NET_POLL_CONTROLLER
2960         .ndo_poll_controller    = ehea_netpoll,
2961 #endif
2962         .ndo_get_stats64        = ehea_get_stats64,
2963         .ndo_set_mac_address    = ehea_set_mac_addr,
2964         .ndo_validate_addr      = eth_validate_addr,
2965         .ndo_set_rx_mode        = ehea_set_multicast_list,
2966         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2967         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2968         .ndo_tx_timeout         = ehea_tx_watchdog,
2969 };
2970
2971 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2972                                          u32 logical_port_id,
2973                                          struct device_node *dn)
2974 {
2975         int ret;
2976         struct net_device *dev;
2977         struct ehea_port *port;
2978         struct device *port_dev;
2979         int jumbo;
2980
2981         /* allocate memory for the port structures */
2982         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2983
2984         if (!dev) {
2985                 ret = -ENOMEM;
2986                 goto out_err;
2987         }
2988
2989         port = netdev_priv(dev);
2990
2991         mutex_init(&port->port_lock);
2992         port->state = EHEA_PORT_DOWN;
2993         port->sig_comp_iv = sq_entries / 10;
2994
2995         port->adapter = adapter;
2996         port->netdev = dev;
2997         port->logical_port_id = logical_port_id;
2998
2999         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3000
3001         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3002         if (!port->mc_list) {
3003                 ret = -ENOMEM;
3004                 goto out_free_ethdev;
3005         }
3006
3007         INIT_LIST_HEAD(&port->mc_list->list);
3008
3009         ret = ehea_sense_port_attr(port);
3010         if (ret)
3011                 goto out_free_mc_list;
3012
3013         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3014         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3015
3016         port_dev = ehea_register_port(port, dn);
3017         if (!port_dev)
3018                 goto out_free_mc_list;
3019
3020         SET_NETDEV_DEV(dev, port_dev);
3021
3022         /* initialize net_device structure */
3023         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3024
3025         dev->netdev_ops = &ehea_netdev_ops;
3026         ehea_set_ethtool_ops(dev);
3027
3028         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3029                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3030         dev->features = NETIF_F_SG | NETIF_F_TSO |
3031                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3032                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3033                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3034         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3035                         NETIF_F_IP_CSUM;
3036         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3037
3038         /* MTU range: 68 - 9022 */
3039         dev->min_mtu = ETH_MIN_MTU;
3040         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3041
3042         INIT_WORK(&port->reset_task, ehea_reset_port);
3043         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3044
3045         init_waitqueue_head(&port->swqe_avail_wq);
3046         init_waitqueue_head(&port->restart_wq);
3047
3048         ret = register_netdev(dev);
3049         if (ret) {
3050                 pr_err("register_netdev failed. ret=%d\n", ret);
3051                 goto out_unreg_port;
3052         }
3053
3054         ret = ehea_get_jumboframe_status(port, &jumbo);
3055         if (ret)
3056                 netdev_err(dev, "failed determining jumbo frame status\n");
3057
3058         netdev_info(dev, "Jumbo frames are %sabled\n",
3059                     jumbo == 1 ? "en" : "dis");
3060
3061         adapter->active_ports++;
3062
3063         return port;
3064
3065 out_unreg_port:
3066         ehea_unregister_port(port);
3067
3068 out_free_mc_list:
3069         kfree(port->mc_list);
3070
3071 out_free_ethdev:
3072         free_netdev(dev);
3073
3074 out_err:
3075         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3076                logical_port_id, ret);
3077         return NULL;
3078 }
3079
3080 static void ehea_shutdown_single_port(struct ehea_port *port)
3081 {
3082         struct ehea_adapter *adapter = port->adapter;
3083
3084         cancel_work_sync(&port->reset_task);
3085         cancel_delayed_work_sync(&port->stats_work);
3086         unregister_netdev(port->netdev);
3087         ehea_unregister_port(port);
3088         kfree(port->mc_list);
3089         free_netdev(port->netdev);
3090         adapter->active_ports--;
3091 }
3092
3093 static int ehea_setup_ports(struct ehea_adapter *adapter)
3094 {
3095         struct device_node *lhea_dn;
3096         struct device_node *eth_dn = NULL;
3097
3098         const u32 *dn_log_port_id;
3099         int i = 0;
3100
3101         lhea_dn = adapter->ofdev->dev.of_node;
3102         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3103
3104                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3105                                                  NULL);
3106                 if (!dn_log_port_id) {
3107                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3108                         continue;
3109                 }
3110
3111                 if (ehea_add_adapter_mr(adapter)) {
3112                         pr_err("creating MR failed\n");
3113                         of_node_put(eth_dn);
3114                         return -EIO;
3115                 }
3116
3117                 adapter->port[i] = ehea_setup_single_port(adapter,
3118                                                           *dn_log_port_id,
3119                                                           eth_dn);
3120                 if (adapter->port[i])
3121                         netdev_info(adapter->port[i]->netdev,
3122                                     "logical port id #%d\n", *dn_log_port_id);
3123                 else
3124                         ehea_remove_adapter_mr(adapter);
3125
3126                 i++;
3127         }
3128         return 0;
3129 }
3130
3131 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3132                                            u32 logical_port_id)
3133 {
3134         struct device_node *lhea_dn;
3135         struct device_node *eth_dn = NULL;
3136         const u32 *dn_log_port_id;
3137
3138         lhea_dn = adapter->ofdev->dev.of_node;
3139         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3140
3141                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3142                                                  NULL);
3143                 if (dn_log_port_id)
3144                         if (*dn_log_port_id == logical_port_id)
3145                                 return eth_dn;
3146         }
3147
3148         return NULL;
3149 }
3150
3151 static ssize_t ehea_probe_port(struct device *dev,
3152                                struct device_attribute *attr,
3153                                const char *buf, size_t count)
3154 {
3155         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3156         struct ehea_port *port;
3157         struct device_node *eth_dn = NULL;
3158         int i;
3159
3160         u32 logical_port_id;
3161
3162         sscanf(buf, "%d", &logical_port_id);
3163
3164         port = ehea_get_port(adapter, logical_port_id);
3165
3166         if (port) {
3167                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3168                             logical_port_id);
3169                 return -EINVAL;
3170         }
3171
3172         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3173
3174         if (!eth_dn) {
3175                 pr_info("no logical port with id %d found\n", logical_port_id);
3176                 return -EINVAL;
3177         }
3178
3179         if (ehea_add_adapter_mr(adapter)) {
3180                 pr_err("creating MR failed\n");
3181                 of_node_put(eth_dn);
3182                 return -EIO;
3183         }
3184
3185         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3186
3187         of_node_put(eth_dn);
3188
3189         if (port) {
3190                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3191                         if (!adapter->port[i]) {
3192                                 adapter->port[i] = port;
3193                                 break;
3194                         }
3195
3196                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3197                             logical_port_id);
3198         } else {
3199                 ehea_remove_adapter_mr(adapter);
3200                 return -EIO;
3201         }
3202
3203         return (ssize_t) count;
3204 }
3205
3206 static ssize_t ehea_remove_port(struct device *dev,
3207                                 struct device_attribute *attr,
3208                                 const char *buf, size_t count)
3209 {
3210         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3211         struct ehea_port *port;
3212         int i;
3213         u32 logical_port_id;
3214
3215         sscanf(buf, "%d", &logical_port_id);
3216
3217         port = ehea_get_port(adapter, logical_port_id);
3218
3219         if (port) {
3220                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3221                             logical_port_id);
3222
3223                 ehea_shutdown_single_port(port);
3224
3225                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3226                         if (adapter->port[i] == port) {
3227                                 adapter->port[i] = NULL;
3228                                 break;
3229                         }
3230         } else {
3231                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3232                        logical_port_id);
3233                 return -EINVAL;
3234         }
3235
3236         ehea_remove_adapter_mr(adapter);
3237
3238         return (ssize_t) count;
3239 }
3240
3241 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3242 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3243
3244 static int ehea_create_device_sysfs(struct platform_device *dev)
3245 {
3246         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3247         if (ret)
3248                 goto out;
3249
3250         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3251 out:
3252         return ret;
3253 }
3254
3255 static void ehea_remove_device_sysfs(struct platform_device *dev)
3256 {
3257         device_remove_file(&dev->dev, &dev_attr_probe_port);
3258         device_remove_file(&dev->dev, &dev_attr_remove_port);
3259 }
3260
3261 static int ehea_reboot_notifier(struct notifier_block *nb,
3262                                 unsigned long action, void *unused)
3263 {
3264         if (action == SYS_RESTART) {
3265                 pr_info("Reboot: freeing all eHEA resources\n");
3266                 ibmebus_unregister_driver(&ehea_driver);
3267         }
3268         return NOTIFY_DONE;
3269 }
3270
3271 static struct notifier_block ehea_reboot_nb = {
3272         .notifier_call = ehea_reboot_notifier,
3273 };
3274
3275 static int ehea_mem_notifier(struct notifier_block *nb,
3276                              unsigned long action, void *data)
3277 {
3278         int ret = NOTIFY_BAD;
3279         struct memory_notify *arg = data;
3280
3281         mutex_lock(&dlpar_mem_lock);
3282
3283         switch (action) {
3284         case MEM_CANCEL_OFFLINE:
3285                 pr_info("memory offlining canceled");
3286                 /* Fall through: re-add canceled memory block */
3287
3288         case MEM_ONLINE:
3289                 pr_info("memory is going online");
3290                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3291                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3292                         goto out_unlock;
3293                 ehea_rereg_mrs();
3294                 break;
3295
3296         case MEM_GOING_OFFLINE:
3297                 pr_info("memory is going offline");
3298                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3299                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3300                         goto out_unlock;
3301                 ehea_rereg_mrs();
3302                 break;
3303
3304         default:
3305                 break;
3306         }
3307
3308         ehea_update_firmware_handles();
3309         ret = NOTIFY_OK;
3310
3311 out_unlock:
3312         mutex_unlock(&dlpar_mem_lock);
3313         return ret;
3314 }
3315
3316 static struct notifier_block ehea_mem_nb = {
3317         .notifier_call = ehea_mem_notifier,
3318 };
3319
3320 static void ehea_crash_handler(void)
3321 {
3322         int i;
3323
3324         if (ehea_fw_handles.arr)
3325                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3326                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3327                                              ehea_fw_handles.arr[i].fwh,
3328                                              FORCE_FREE);
3329
3330         if (ehea_bcmc_regs.arr)
3331                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3332                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3333                                               ehea_bcmc_regs.arr[i].port_id,
3334                                               ehea_bcmc_regs.arr[i].reg_type,
3335                                               ehea_bcmc_regs.arr[i].macaddr,
3336                                               0, H_DEREG_BCMC);
3337 }
3338
3339 static atomic_t ehea_memory_hooks_registered;
3340
3341 /* Register memory hooks on probe of first adapter */
3342 static int ehea_register_memory_hooks(void)
3343 {
3344         int ret = 0;
3345
3346         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3347                 return 0;
3348
3349         ret = ehea_create_busmap();
3350         if (ret) {
3351                 pr_info("ehea_create_busmap failed\n");
3352                 goto out;
3353         }
3354
3355         ret = register_reboot_notifier(&ehea_reboot_nb);
3356         if (ret) {
3357                 pr_info("register_reboot_notifier failed\n");
3358                 goto out;
3359         }
3360
3361         ret = register_memory_notifier(&ehea_mem_nb);
3362         if (ret) {
3363                 pr_info("register_memory_notifier failed\n");
3364                 goto out2;
3365         }
3366
3367         ret = crash_shutdown_register(ehea_crash_handler);
3368         if (ret) {
3369                 pr_info("crash_shutdown_register failed\n");
3370                 goto out3;
3371         }
3372
3373         return 0;
3374
3375 out3:
3376         unregister_memory_notifier(&ehea_mem_nb);
3377 out2:
3378         unregister_reboot_notifier(&ehea_reboot_nb);
3379 out:
3380         atomic_dec(&ehea_memory_hooks_registered);
3381         return ret;
3382 }
3383
3384 static void ehea_unregister_memory_hooks(void)
3385 {
3386         /* Only remove the hooks if we've registered them */
3387         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3388                 return;
3389
3390         unregister_reboot_notifier(&ehea_reboot_nb);
3391         if (crash_shutdown_unregister(ehea_crash_handler))
3392                 pr_info("failed unregistering crash handler\n");
3393         unregister_memory_notifier(&ehea_mem_nb);
3394 }
3395
3396 static int ehea_probe_adapter(struct platform_device *dev)
3397 {
3398         struct ehea_adapter *adapter;
3399         const u64 *adapter_handle;
3400         int ret;
3401         int i;
3402
3403         ret = ehea_register_memory_hooks();
3404         if (ret)
3405                 return ret;
3406
3407         if (!dev || !dev->dev.of_node) {
3408                 pr_err("Invalid ibmebus device probed\n");
3409                 return -EINVAL;
3410         }
3411
3412         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3413         if (!adapter) {
3414                 ret = -ENOMEM;
3415                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3416                 goto out;
3417         }
3418
3419         list_add(&adapter->list, &adapter_list);
3420
3421         adapter->ofdev = dev;
3422
3423         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3424                                          NULL);
3425         if (adapter_handle)
3426                 adapter->handle = *adapter_handle;
3427
3428         if (!adapter->handle) {
3429                 dev_err(&dev->dev, "failed getting handle for adapter"
3430                         " '%pOF'\n", dev->dev.of_node);
3431                 ret = -ENODEV;
3432                 goto out_free_ad;
3433         }
3434
3435         adapter->pd = EHEA_PD_ID;
3436
3437         platform_set_drvdata(dev, adapter);
3438
3439
3440         /* initialize adapter and ports */
3441         /* get adapter properties */
3442         ret = ehea_sense_adapter_attr(adapter);
3443         if (ret) {
3444                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3445                 goto out_free_ad;
3446         }
3447
3448         adapter->neq = ehea_create_eq(adapter,
3449                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3450         if (!adapter->neq) {
3451                 ret = -EIO;
3452                 dev_err(&dev->dev, "NEQ creation failed\n");
3453                 goto out_free_ad;
3454         }
3455
3456         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3457                      (unsigned long)adapter);
3458
3459         ret = ehea_create_device_sysfs(dev);
3460         if (ret)
3461                 goto out_kill_eq;
3462
3463         ret = ehea_setup_ports(adapter);
3464         if (ret) {
3465                 dev_err(&dev->dev, "setup_ports failed\n");
3466                 goto out_rem_dev_sysfs;
3467         }
3468
3469         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3470                                   ehea_interrupt_neq, 0,
3471                                   "ehea_neq", adapter);
3472         if (ret) {
3473                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3474                 goto out_shutdown_ports;
3475         }
3476
3477         /* Handle any events that might be pending. */
3478         tasklet_hi_schedule(&adapter->neq_tasklet);
3479
3480         ret = 0;
3481         goto out;
3482
3483 out_shutdown_ports:
3484         for (i = 0; i < EHEA_MAX_PORTS; i++)
3485                 if (adapter->port[i]) {
3486                         ehea_shutdown_single_port(adapter->port[i]);
3487                         adapter->port[i] = NULL;
3488                 }
3489
3490 out_rem_dev_sysfs:
3491         ehea_remove_device_sysfs(dev);
3492
3493 out_kill_eq:
3494         ehea_destroy_eq(adapter->neq);
3495
3496 out_free_ad:
3497         list_del(&adapter->list);
3498
3499 out:
3500         ehea_update_firmware_handles();
3501
3502         return ret;
3503 }
3504
3505 static int ehea_remove(struct platform_device *dev)
3506 {
3507         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3508         int i;
3509
3510         for (i = 0; i < EHEA_MAX_PORTS; i++)
3511                 if (adapter->port[i]) {
3512                         ehea_shutdown_single_port(adapter->port[i]);
3513                         adapter->port[i] = NULL;
3514                 }
3515
3516         ehea_remove_device_sysfs(dev);
3517
3518         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3519         tasklet_kill(&adapter->neq_tasklet);
3520
3521         ehea_destroy_eq(adapter->neq);
3522         ehea_remove_adapter_mr(adapter);
3523         list_del(&adapter->list);
3524
3525         ehea_update_firmware_handles();
3526
3527         return 0;
3528 }
3529
3530 static int check_module_parm(void)
3531 {
3532         int ret = 0;
3533
3534         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3535             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3536                 pr_info("Bad parameter: rq1_entries\n");
3537                 ret = -EINVAL;
3538         }
3539         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3540             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3541                 pr_info("Bad parameter: rq2_entries\n");
3542                 ret = -EINVAL;
3543         }
3544         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3545             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3546                 pr_info("Bad parameter: rq3_entries\n");
3547                 ret = -EINVAL;
3548         }
3549         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3550             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3551                 pr_info("Bad parameter: sq_entries\n");
3552                 ret = -EINVAL;
3553         }
3554
3555         return ret;
3556 }
3557
3558 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3559 {
3560         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3561 }
3562
3563 static DRIVER_ATTR_RO(capabilities);
3564
3565 static int __init ehea_module_init(void)
3566 {
3567         int ret;
3568
3569         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3570
3571         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3572         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3573
3574         mutex_init(&ehea_fw_handles.lock);
3575         spin_lock_init(&ehea_bcmc_regs.lock);
3576
3577         ret = check_module_parm();
3578         if (ret)
3579                 goto out;
3580
3581         ret = ibmebus_register_driver(&ehea_driver);
3582         if (ret) {
3583                 pr_err("failed registering eHEA device driver on ebus\n");
3584                 goto out;
3585         }
3586
3587         ret = driver_create_file(&ehea_driver.driver,
3588                                  &driver_attr_capabilities);
3589         if (ret) {
3590                 pr_err("failed to register capabilities attribute, ret=%d\n",
3591                        ret);
3592                 goto out2;
3593         }
3594
3595         return ret;
3596
3597 out2:
3598         ibmebus_unregister_driver(&ehea_driver);
3599 out:
3600         return ret;
3601 }
3602
3603 static void __exit ehea_module_exit(void)
3604 {
3605         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3606         ibmebus_unregister_driver(&ehea_driver);
3607         ehea_unregister_memory_hooks();
3608         kfree(ehea_fw_handles.arr);
3609         kfree(ehea_bcmc_regs.arr);
3610         ehea_destroy_busmap();
3611 }
3612
3613 module_init(ehea_module_init);
3614 module_exit(ehea_module_exit);