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 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 925 {
 926         struct ehea_port_res *pr = param;
 927
 928         napi_schedule(&pr->napi);
 929
 930         return IRQ_HANDLED;
 931 }
 932
 933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 934 {
 935         struct ehea_port *port = param;
 936         struct ehea_eqe *eqe;
 937         struct ehea_qp *qp;
 938         u32 qp_token;
 939         u64 resource_type, aer, aerr;
 940         int reset_port = 0;
 941
 942         eqe = ehea_poll_eq(port->qp_eq);
 943
 944         while (eqe) {
 945                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 946                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 947                        eqe->entry, qp_token);
 948
 949                 qp = port->port_res[qp_token].qp;
 950
 951                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 952                                                 &aer, &aerr);
 953
 954                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 955                         if ((aer & EHEA_AER_RESET_MASK) ||
 956                             (aerr & EHEA_AERR_RESET_MASK))
 957                                  reset_port = 1;
 958                 } else
 959                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 960
 961                 eqe = ehea_poll_eq(port->qp_eq);
 962         }
 963
 964         if (reset_port) {
 965                 pr_err("Resetting port\n");
 966                 ehea_schedule_port_reset(port);
 967         }
 968
 969         return IRQ_HANDLED;
 970 }
 971
 972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 973                                        int logical_port)
 974 {
 975         int i;
 976
 977         for (i = 0; i < EHEA_MAX_PORTS; i++)
 978                 if (adapter->port[i])
 979                         if (adapter->port[i]->logical_port_id == logical_port)
 980                                 return adapter->port[i];
 981         return NULL;
 982 }
 983
 984 int ehea_sense_port_attr(struct ehea_port *port)
 985 {
 986         int ret;
 987         u64 hret;
 988         struct hcp_ehea_port_cb0 *cb0;
 989
 990         /* may be called via ehea_neq_tasklet() */
 991         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 992         if (!cb0) {
 993                 pr_err("no mem for cb0\n");
 994                 ret = -ENOMEM;
 995                 goto out;
 996         }
 997
 998         hret = ehea_h_query_ehea_port(port->adapter->handle,
 999                                       port->logical_port_id, H_PORT_CB0,
1000                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1001                                       cb0);
1002         if (hret != H_SUCCESS) {
1003                 ret = -EIO;
1004                 goto out_free;
1005         }
1006
1007         /* MAC address */
1008         port->mac_addr = cb0->port_mac_addr << 16;
1009
1010         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1011                 ret = -EADDRNOTAVAIL;
1012                 goto out_free;
1013         }
1014
1015         /* Port speed */
1016         switch (cb0->port_speed) {
1017         case H_SPEED_10M_H:
1018                 port->port_speed = EHEA_SPEED_10M;
1019                 port->full_duplex = 0;
1020                 break;
1021         case H_SPEED_10M_F:
1022                 port->port_speed = EHEA_SPEED_10M;
1023                 port->full_duplex = 1;
1024                 break;
1025         case H_SPEED_100M_H:
1026                 port->port_speed = EHEA_SPEED_100M;
1027                 port->full_duplex = 0;
1028                 break;
1029         case H_SPEED_100M_F:
1030                 port->port_speed = EHEA_SPEED_100M;
1031                 port->full_duplex = 1;
1032                 break;
1033         case H_SPEED_1G_F:
1034                 port->port_speed = EHEA_SPEED_1G;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_10G_F:
1038                 port->port_speed = EHEA_SPEED_10G;
1039                 port->full_duplex = 1;
1040                 break;
1041         default:
1042                 port->port_speed = 0;
1043                 port->full_duplex = 0;
1044                 break;
1045         }
1046
1047         port->autoneg = 1;
1048         port->num_mcs = cb0->num_default_qps;
1049
1050         /* Number of default QPs */
1051         if (use_mcs)
1052                 port->num_def_qps = cb0->num_default_qps;
1053         else
1054                 port->num_def_qps = 1;
1055
1056         if (!port->num_def_qps) {
1057                 ret = -EINVAL;
1058                 goto out_free;
1059         }
1060
1061         ret = 0;
1062 out_free:
1063         if (ret || netif_msg_probe(port))
1064                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1065         free_page((unsigned long)cb0);
1066 out:
1067         return ret;
1068 }
1069
1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1071 {
1072         struct hcp_ehea_port_cb4 *cb4;
1073         u64 hret;
1074         int ret = 0;
1075
1076         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1077         if (!cb4) {
1078                 pr_err("no mem for cb4\n");
1079                 ret = -ENOMEM;
1080                 goto out;
1081         }
1082
1083         cb4->port_speed = port_speed;
1084
1085         netif_carrier_off(port->netdev);
1086
1087         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1088                                        port->logical_port_id,
1089                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1090         if (hret == H_SUCCESS) {
1091                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1092
1093                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1094                                               port->logical_port_id,
1095                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1096                                               cb4);
1097                 if (hret == H_SUCCESS) {
1098                         switch (cb4->port_speed) {
1099                         case H_SPEED_10M_H:
1100                                 port->port_speed = EHEA_SPEED_10M;
1101                                 port->full_duplex = 0;
1102                                 break;
1103                         case H_SPEED_10M_F:
1104                                 port->port_speed = EHEA_SPEED_10M;
1105                                 port->full_duplex = 1;
1106                                 break;
1107                         case H_SPEED_100M_H:
1108                                 port->port_speed = EHEA_SPEED_100M;
1109                                 port->full_duplex = 0;
1110                                 break;
1111                         case H_SPEED_100M_F:
1112                                 port->port_speed = EHEA_SPEED_100M;
1113                                 port->full_duplex = 1;
1114                                 break;
1115                         case H_SPEED_1G_F:
1116                                 port->port_speed = EHEA_SPEED_1G;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_10G_F:
1120                                 port->port_speed = EHEA_SPEED_10G;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         default:
1124                                 port->port_speed = 0;
1125                                 port->full_duplex = 0;
1126                                 break;
1127                         }
1128                 } else {
1129                         pr_err("Failed sensing port speed\n");
1130                         ret = -EIO;
1131                 }
1132         } else {
1133                 if (hret == H_AUTHORITY) {
1134                         pr_info("Hypervisor denied setting port speed\n");
1135                         ret = -EPERM;
1136                 } else {
1137                         ret = -EIO;
1138                         pr_err("Failed setting port speed\n");
1139                 }
1140         }
1141         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1142                 netif_carrier_on(port->netdev);
1143
1144         free_page((unsigned long)cb4);
1145 out:
1146         return ret;
1147 }
1148
1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1150 {
1151         int ret;
1152         u8 ec;
1153         u8 portnum;
1154         struct ehea_port *port;
1155         struct net_device *dev;
1156
1157         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1158         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1159         port = ehea_get_port(adapter, portnum);
1160         if (!port) {
1161                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1162                 return;
1163         }
1164         dev = port->netdev;
1165
1166         switch (ec) {
1167         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1168
1169                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170                         if (!netif_carrier_ok(dev)) {
1171                                 ret = ehea_sense_port_attr(port);
1172                                 if (ret) {
1173                                         netdev_err(dev, "failed resensing port attributes\n");
1174                                         break;
1175                                 }
1176
1177                                 netif_info(port, link, dev,
1178                                            "Logical port up: %dMbps %s Duplex\n",
1179                                            port->port_speed,
1180                                            port->full_duplex == 1 ?
1181                                            "Full" : "Half");
1182
1183                                 netif_carrier_on(dev);
1184                                 netif_wake_queue(dev);
1185                         }
1186                 } else
1187                         if (netif_carrier_ok(dev)) {
1188                                 netif_info(port, link, dev,
1189                                            "Logical port down\n");
1190                                 netif_carrier_off(dev);
1191                                 netif_tx_disable(dev);
1192                         }
1193
1194                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195                         port->phy_link = EHEA_PHY_LINK_UP;
1196                         netif_info(port, link, dev,
1197                                    "Physical port up\n");
1198                         if (prop_carrier_state)
1199                                 netif_carrier_on(dev);
1200                 } else {
1201                         port->phy_link = EHEA_PHY_LINK_DOWN;
1202                         netif_info(port, link, dev,
1203                                    "Physical port down\n");
1204                         if (prop_carrier_state)
1205                                 netif_carrier_off(dev);
1206                 }
1207
1208                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209                         netdev_info(dev,
1210                                     "External switch port is primary port\n");
1211                 else
1212                         netdev_info(dev,
1213                                     "External switch port is backup port\n");
1214
1215                 break;
1216         case EHEA_EC_ADAPTER_MALFUNC:
1217                 netdev_err(dev, "Adapter malfunction\n");
1218                 break;
1219         case EHEA_EC_PORT_MALFUNC:
1220                 netdev_info(dev, "Port malfunction\n");
1221                 netif_carrier_off(dev);
1222                 netif_tx_disable(dev);
1223                 break;
1224         default:
1225                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226                 break;
1227         }
1228 }
1229
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233         struct ehea_eqe *eqe;
1234         u64 event_mask;
1235
1236         eqe = ehea_poll_eq(adapter->neq);
1237         pr_debug("eqe=%p\n", eqe);
1238
1239         while (eqe) {
1240                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241                 ehea_parse_eqe(adapter, eqe->entry);
1242                 eqe = ehea_poll_eq(adapter->neq);
1243                 pr_debug("next eqe=%p\n", eqe);
1244         }
1245
1246         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1249
1250         ehea_h_reset_events(adapter->handle,
1251                             adapter->neq->fw_handle, event_mask);
1252 }
1253
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256         struct ehea_adapter *adapter = param;
1257         tasklet_hi_schedule(&adapter->neq_tasklet);
1258         return IRQ_HANDLED;
1259 }
1260
1261
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264         int ret;
1265         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1266
1267         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1268
1269         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1270
1271         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1272
1273         return ret;
1274 }
1275
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278         struct ehea_port *port = netdev_priv(dev);
1279         struct ehea_port_res *pr;
1280         int i, ret;
1281
1282
1283         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284                  dev->name);
1285
1286         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287                                   ehea_qp_aff_irq_handler,
1288                                   0, port->int_aff_name, port);
1289         if (ret) {
1290                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291                            port->qp_eq->attr.ist1);
1292                 goto out_free_qpeq;
1293         }
1294
1295         netif_info(port, ifup, dev,
1296                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297                    port->qp_eq->attr.ist1);
1298
1299
1300         for (i = 0; i < port->num_def_qps; i++) {
1301                 pr = &port->port_res[i];
1302                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303                          "%s-queue%d", dev->name, i);
1304                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305                                           ehea_recv_irq_handler,
1306                                           0, pr->int_send_name, pr);
1307                 if (ret) {
1308                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1309                                    i, pr->eq->attr.ist1);
1310                         goto out_free_req;
1311                 }
1312                 netif_info(port, ifup, dev,
1313                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1314                            pr->eq->attr.ist1, i);
1315         }
1316 out:
1317         return ret;
1318
1319
1320 out_free_req:
1321         while (--i >= 0) {
1322                 u32 ist = port->port_res[i].eq->attr.ist1;
1323                 ibmebus_free_irq(ist, &port->port_res[i]);
1324         }
1325
1326 out_free_qpeq:
1327         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1328         i = port->num_def_qps;
1329
1330         goto out;
1331
1332 }
1333
1334 static void ehea_free_interrupts(struct net_device *dev)
1335 {
1336         struct ehea_port *port = netdev_priv(dev);
1337         struct ehea_port_res *pr;
1338         int i;
1339
1340         /* send */
1341
1342         for (i = 0; i < port->num_def_qps; i++) {
1343                 pr = &port->port_res[i];
1344                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1345                 netif_info(port, intr, dev,
1346                            "free send irq for res %d with handle 0x%X\n",
1347                            i, pr->eq->attr.ist1);
1348         }
1349
1350         /* associated events */
1351         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1352         netif_info(port, intr, dev,
1353                    "associated event interrupt for handle 0x%X freed\n",
1354                    port->qp_eq->attr.ist1);
1355 }
1356
1357 static int ehea_configure_port(struct ehea_port *port)
1358 {
1359         int ret, i;
1360         u64 hret, mask;
1361         struct hcp_ehea_port_cb0 *cb0;
1362
1363         ret = -ENOMEM;
1364         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1365         if (!cb0)
1366                 goto out;
1367
1368         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1369                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1370                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1372                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1373                                       PXLY_RC_VLAN_FILTER)
1374                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1375
1376         for (i = 0; i < port->num_mcs; i++)
1377                 if (use_mcs)
1378                         cb0->default_qpn_arr[i] =
1379                                 port->port_res[i].qp->init_attr.qp_nr;
1380                 else
1381                         cb0->default_qpn_arr[i] =
1382                                 port->port_res[0].qp->init_attr.qp_nr;
1383
1384         if (netif_msg_ifup(port))
1385                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1386
1387         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1388              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1389
1390         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1391                                        port->logical_port_id,
1392                                        H_PORT_CB0, mask, cb0);
1393         ret = -EIO;
1394         if (hret != H_SUCCESS)
1395                 goto out_free;
1396
1397         ret = 0;
1398
1399 out_free:
1400         free_page((unsigned long)cb0);
1401 out:
1402         return ret;
1403 }
1404
1405 static int ehea_gen_smrs(struct ehea_port_res *pr)
1406 {
1407         int ret;
1408         struct ehea_adapter *adapter = pr->port->adapter;
1409
1410         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1411         if (ret)
1412                 goto out;
1413
1414         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1415         if (ret)
1416                 goto out_free;
1417
1418         return 0;
1419
1420 out_free:
1421         ehea_rem_mr(&pr->send_mr);
1422 out:
1423         pr_err("Generating SMRS failed\n");
1424         return -EIO;
1425 }
1426
1427 static int ehea_rem_smrs(struct ehea_port_res *pr)
1428 {
1429         if ((ehea_rem_mr(&pr->send_mr)) ||
1430             (ehea_rem_mr(&pr->recv_mr)))
1431                 return -EIO;
1432         else
1433                 return 0;
1434 }
1435
1436 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1437 {
1438         int arr_size = sizeof(void *) * max_q_entries;
1439
1440         q_skba->arr = vzalloc(arr_size);
1441         if (!q_skba->arr)
1442                 return -ENOMEM;
1443
1444         q_skba->len = max_q_entries;
1445         q_skba->index = 0;
1446         q_skba->os_skbs = 0;
1447
1448         return 0;
1449 }
1450
1451 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1452                               struct port_res_cfg *pr_cfg, int queue_token)
1453 {
1454         struct ehea_adapter *adapter = port->adapter;
1455         enum ehea_eq_type eq_type = EHEA_EQ;
1456         struct ehea_qp_init_attr *init_attr = NULL;
1457         int ret = -EIO;
1458         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1459
1460         tx_bytes = pr->tx_bytes;
1461         tx_packets = pr->tx_packets;
1462         rx_bytes = pr->rx_bytes;
1463         rx_packets = pr->rx_packets;
1464
1465         memset(pr, 0, sizeof(struct ehea_port_res));
1466
1467         pr->tx_bytes = tx_bytes;
1468         pr->tx_packets = tx_packets;
1469         pr->rx_bytes = rx_bytes;
1470         pr->rx_packets = rx_packets;
1471
1472         pr->port = port;
1473
1474         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1475         if (!pr->eq) {
1476                 pr_err("create_eq failed (eq)\n");
1477                 goto out_free;
1478         }
1479
1480         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1481                                      pr->eq->fw_handle,
1482                                      port->logical_port_id);
1483         if (!pr->recv_cq) {
1484                 pr_err("create_cq failed (cq_recv)\n");
1485                 goto out_free;
1486         }
1487
1488         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1489                                      pr->eq->fw_handle,
1490                                      port->logical_port_id);
1491         if (!pr->send_cq) {
1492                 pr_err("create_cq failed (cq_send)\n");
1493                 goto out_free;
1494         }
1495
1496         if (netif_msg_ifup(port))
1497                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1498                         pr->send_cq->attr.act_nr_of_cqes,
1499                         pr->recv_cq->attr.act_nr_of_cqes);
1500
1501         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1502         if (!init_attr) {
1503                 ret = -ENOMEM;
1504                 pr_err("no mem for ehea_qp_init_attr\n");
1505                 goto out_free;
1506         }
1507
1508         init_attr->low_lat_rq1 = 1;
1509         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1510         init_attr->rq_count = 3;
1511         init_attr->qp_token = queue_token;
1512         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1513         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1514         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1515         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1516         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1517         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1518         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1519         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1520         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1521         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1522         init_attr->port_nr = port->logical_port_id;
1523         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1524         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1525         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1526
1527         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1528         if (!pr->qp) {
1529                 pr_err("create_qp failed\n");
1530                 ret = -EIO;
1531                 goto out_free;
1532         }
1533
1534         if (netif_msg_ifup(port))
1535                 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",
1536                         init_attr->qp_nr,
1537                         init_attr->act_nr_send_wqes,
1538                         init_attr->act_nr_rwqes_rq1,
1539                         init_attr->act_nr_rwqes_rq2,
1540                         init_attr->act_nr_rwqes_rq3);
1541
1542         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1543
1544         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1545         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1546         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1547         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1548         if (ret)
1549                 goto out_free;
1550
1551         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1552         if (ehea_gen_smrs(pr) != 0) {
1553                 ret = -EIO;
1554                 goto out_free;
1555         }
1556
1557         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1558
1559         kfree(init_attr);
1560
1561         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1562
1563         ret = 0;
1564         goto out;
1565
1566 out_free:
1567         kfree(init_attr);
1568         vfree(pr->sq_skba.arr);
1569         vfree(pr->rq1_skba.arr);
1570         vfree(pr->rq2_skba.arr);
1571         vfree(pr->rq3_skba.arr);
1572         ehea_destroy_qp(pr->qp);
1573         ehea_destroy_cq(pr->send_cq);
1574         ehea_destroy_cq(pr->recv_cq);
1575         ehea_destroy_eq(pr->eq);
1576 out:
1577         return ret;
1578 }
1579
1580 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1581 {
1582         int ret, i;
1583
1584         if (pr->qp)
1585                 netif_napi_del(&pr->napi);
1586
1587         ret = ehea_destroy_qp(pr->qp);
1588
1589         if (!ret) {
1590                 ehea_destroy_cq(pr->send_cq);
1591                 ehea_destroy_cq(pr->recv_cq);
1592                 ehea_destroy_eq(pr->eq);
1593
1594                 for (i = 0; i < pr->rq1_skba.len; i++)
1595                         if (pr->rq1_skba.arr[i])
1596                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1597
1598                 for (i = 0; i < pr->rq2_skba.len; i++)
1599                         if (pr->rq2_skba.arr[i])
1600                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1601
1602                 for (i = 0; i < pr->rq3_skba.len; i++)
1603                         if (pr->rq3_skba.arr[i])
1604                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1605
1606                 for (i = 0; i < pr->sq_skba.len; i++)
1607                         if (pr->sq_skba.arr[i])
1608                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1609
1610                 vfree(pr->rq1_skba.arr);
1611                 vfree(pr->rq2_skba.arr);
1612                 vfree(pr->rq3_skba.arr);
1613                 vfree(pr->sq_skba.arr);
1614                 ret = ehea_rem_smrs(pr);
1615         }
1616         return ret;
1617 }
1618
1619 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1620                                   u32 lkey)
1621 {
1622         int skb_data_size = skb_headlen(skb);
1623         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1624         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1625         unsigned int immediate_len = SWQE2_MAX_IMM;
1626
1627         swqe->descriptors = 0;
1628
1629         if (skb_is_gso(skb)) {
1630                 swqe->tx_control |= EHEA_SWQE_TSO;
1631                 swqe->mss = skb_shinfo(skb)->gso_size;
1632                 /*
1633                  * For TSO packets we only copy the headers into the
1634                  * immediate area.
1635                  */
1636                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1637         }
1638
1639         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1640                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1641                 swqe->immediate_data_length = immediate_len;
1642
1643                 if (skb_data_size > immediate_len) {
1644                         sg1entry->l_key = lkey;
1645                         sg1entry->len = skb_data_size - immediate_len;
1646                         sg1entry->vaddr =
1647                                 ehea_map_vaddr(skb->data + immediate_len);
1648                         swqe->descriptors++;
1649                 }
1650         } else {
1651                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1652                 swqe->immediate_data_length = skb_data_size;
1653         }
1654 }
1655
1656 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1657                                     struct ehea_swqe *swqe, u32 lkey)
1658 {
1659         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1660         skb_frag_t *frag;
1661         int nfrags, sg1entry_contains_frag_data, i;
1662
1663         nfrags = skb_shinfo(skb)->nr_frags;
1664         sg1entry = &swqe->u.immdata_desc.sg_entry;
1665         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1666         sg1entry_contains_frag_data = 0;
1667
1668         write_swqe2_immediate(skb, swqe, lkey);
1669
1670         /* write descriptors */
1671         if (nfrags > 0) {
1672                 if (swqe->descriptors == 0) {
1673                         /* sg1entry not yet used */
1674                         frag = &skb_shinfo(skb)->frags[0];
1675
1676                         /* copy sg1entry data */
1677                         sg1entry->l_key = lkey;
1678                         sg1entry->len = skb_frag_size(frag);
1679                         sg1entry->vaddr =
1680                                 ehea_map_vaddr(skb_frag_address(frag));
1681                         swqe->descriptors++;
1682                         sg1entry_contains_frag_data = 1;
1683                 }
1684
1685                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1686
1687                         frag = &skb_shinfo(skb)->frags[i];
1688                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1689
1690                         sgentry->l_key = lkey;
1691                         sgentry->len = skb_frag_size(frag);
1692                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1693                         swqe->descriptors++;
1694                 }
1695         }
1696 }
1697
1698 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1699 {
1700         int ret = 0;
1701         u64 hret;
1702         u8 reg_type;
1703
1704         /* De/Register untagged packets */
1705         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1706         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1707                                      port->logical_port_id,
1708                                      reg_type, port->mac_addr, 0, hcallid);
1709         if (hret != H_SUCCESS) {
1710                 pr_err("%sregistering bc address failed (tagged)\n",
1711                        hcallid == H_REG_BCMC ? "" : "de");
1712                 ret = -EIO;
1713                 goto out_herr;
1714         }
1715
1716         /* De/Register VLAN packets */
1717         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1718         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1719                                      port->logical_port_id,
1720                                      reg_type, port->mac_addr, 0, hcallid);
1721         if (hret != H_SUCCESS) {
1722                 pr_err("%sregistering bc address failed (vlan)\n",
1723                        hcallid == H_REG_BCMC ? "" : "de");
1724                 ret = -EIO;
1725         }
1726 out_herr:
1727         return ret;
1728 }
1729
1730 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1731 {
1732         struct ehea_port *port = netdev_priv(dev);
1733         struct sockaddr *mac_addr = sa;
1734         struct hcp_ehea_port_cb0 *cb0;
1735         int ret;
1736         u64 hret;
1737
1738         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1739                 ret = -EADDRNOTAVAIL;
1740                 goto out;
1741         }
1742
1743         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1744         if (!cb0) {
1745                 pr_err("no mem for cb0\n");
1746                 ret = -ENOMEM;
1747                 goto out;
1748         }
1749
1750         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1751
1752         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1753
1754         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1755                                        port->logical_port_id, H_PORT_CB0,
1756                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1757         if (hret != H_SUCCESS) {
1758                 ret = -EIO;
1759                 goto out_free;
1760         }
1761
1762         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1763
1764         /* Deregister old MAC in pHYP */
1765         if (port->state == EHEA_PORT_UP) {
1766                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1767                 if (ret)
1768                         goto out_upregs;
1769         }
1770
1771         port->mac_addr = cb0->port_mac_addr << 16;
1772
1773         /* Register new MAC in pHYP */
1774         if (port->state == EHEA_PORT_UP) {
1775                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1776                 if (ret)
1777                         goto out_upregs;
1778         }
1779
1780         ret = 0;
1781
1782 out_upregs:
1783         ehea_update_bcmc_registrations();
1784 out_free:
1785         free_page((unsigned long)cb0);
1786 out:
1787         return ret;
1788 }
1789
1790 static void ehea_promiscuous_error(u64 hret, int enable)
1791 {
1792         if (hret == H_AUTHORITY)
1793                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1794                         enable == 1 ? "en" : "dis");
1795         else
1796                 pr_err("failed %sabling promiscuous mode\n",
1797                        enable == 1 ? "en" : "dis");
1798 }
1799
1800 static void ehea_promiscuous(struct net_device *dev, int enable)
1801 {
1802         struct ehea_port *port = netdev_priv(dev);
1803         struct hcp_ehea_port_cb7 *cb7;
1804         u64 hret;
1805
1806         if (enable == port->promisc)
1807                 return;
1808
1809         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1810         if (!cb7) {
1811                 pr_err("no mem for cb7\n");
1812                 goto out;
1813         }
1814
1815         /* Modify Pxs_DUCQPN in CB7 */
1816         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1817
1818         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1819                                        port->logical_port_id,
1820                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1821         if (hret) {
1822                 ehea_promiscuous_error(hret, enable);
1823                 goto out;
1824         }
1825
1826         port->promisc = enable;
1827 out:
1828         free_page((unsigned long)cb7);
1829 }
1830
1831 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1832                                      u32 hcallid)
1833 {
1834         u64 hret;
1835         u8 reg_type;
1836
1837         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1838         if (mc_mac_addr == 0)
1839                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1840
1841         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842                                      port->logical_port_id,
1843                                      reg_type, mc_mac_addr, 0, hcallid);
1844         if (hret)
1845                 goto out;
1846
1847         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1848         if (mc_mac_addr == 0)
1849                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1850
1851         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1852                                      port->logical_port_id,
1853                                      reg_type, mc_mac_addr, 0, hcallid);
1854 out:
1855         return hret;
1856 }
1857
1858 static int ehea_drop_multicast_list(struct net_device *dev)
1859 {
1860         struct ehea_port *port = netdev_priv(dev);
1861         struct ehea_mc_list *mc_entry = port->mc_list;
1862         struct list_head *pos;
1863         struct list_head *temp;
1864         int ret = 0;
1865         u64 hret;
1866
1867         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1868                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1869
1870                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1871                                                  H_DEREG_BCMC);
1872                 if (hret) {
1873                         pr_err("failed deregistering mcast MAC\n");
1874                         ret = -EIO;
1875                 }
1876
1877                 list_del(pos);
1878                 kfree(mc_entry);
1879         }
1880         return ret;
1881 }
1882
1883 static void ehea_allmulti(struct net_device *dev, int enable)
1884 {
1885         struct ehea_port *port = netdev_priv(dev);
1886         u64 hret;
1887
1888         if (!port->allmulti) {
1889                 if (enable) {
1890                         /* Enable ALLMULTI */
1891                         ehea_drop_multicast_list(dev);
1892                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1893                         if (!hret)
1894                                 port->allmulti = 1;
1895                         else
1896                                 netdev_err(dev,
1897                                            "failed enabling IFF_ALLMULTI\n");
1898                 }
1899         } else {
1900                 if (!enable) {
1901                         /* Disable ALLMULTI */
1902                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1903                         if (!hret)
1904                                 port->allmulti = 0;
1905                         else
1906                                 netdev_err(dev,
1907                                            "failed disabling IFF_ALLMULTI\n");
1908                 }
1909         }
1910 }
1911
1912 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1913 {
1914         struct ehea_mc_list *ehea_mcl_entry;
1915         u64 hret;
1916
1917         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1918         if (!ehea_mcl_entry)
1919                 return;
1920
1921         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1922
1923         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1924
1925         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1926                                          H_REG_BCMC);
1927         if (!hret)
1928                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1929         else {
1930                 pr_err("failed registering mcast MAC\n");
1931                 kfree(ehea_mcl_entry);
1932         }
1933 }
1934
1935 static void ehea_set_multicast_list(struct net_device *dev)
1936 {
1937         struct ehea_port *port = netdev_priv(dev);
1938         struct netdev_hw_addr *ha;
1939         int ret;
1940
1941         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1942
1943         if (dev->flags & IFF_ALLMULTI) {
1944                 ehea_allmulti(dev, 1);
1945                 goto out;
1946         }
1947         ehea_allmulti(dev, 0);
1948
1949         if (!netdev_mc_empty(dev)) {
1950                 ret = ehea_drop_multicast_list(dev);
1951                 if (ret) {
1952                         /* Dropping the current multicast list failed.
1953                          * Enabling ALL_MULTI is the best we can do.
1954                          */
1955                         ehea_allmulti(dev, 1);
1956                 }
1957
1958                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1959                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1960                                 port->adapter->max_mc_mac);
1961                         goto out;
1962                 }
1963
1964                 netdev_for_each_mc_addr(ha, dev)
1965                         ehea_add_multicast_entry(port, ha->addr);
1966
1967         }
1968 out:
1969         ehea_update_bcmc_registrations();
1970 }
1971
1972 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1973 {
1974         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1975
1976         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1977                 return;
1978
1979         if (skb->ip_summed == CHECKSUM_PARTIAL)
1980                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1981
1982         swqe->ip_start = skb_network_offset(skb);
1983         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1984
1985         switch (ip_hdr(skb)->protocol) {
1986         case IPPROTO_UDP:
1987                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1988                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1989
1990                 swqe->tcp_offset = swqe->ip_end + 1 +
1991                                    offsetof(struct udphdr, check);
1992                 break;
1993
1994         case IPPROTO_TCP:
1995                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1996                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1997
1998                 swqe->tcp_offset = swqe->ip_end + 1 +
1999                                    offsetof(struct tcphdr, check);
2000                 break;
2001         }
2002 }
2003
2004 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2005                        struct ehea_swqe *swqe, u32 lkey)
2006 {
2007         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2008
2009         xmit_common(skb, swqe);
2010
2011         write_swqe2_data(skb, dev, swqe, lkey);
2012 }
2013
2014 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2015                        struct ehea_swqe *swqe)
2016 {
2017         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2018
2019         xmit_common(skb, swqe);
2020
2021         if (!skb->data_len)
2022                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2023         else
2024                 skb_copy_bits(skb, 0, imm_data, skb->len);
2025
2026         swqe->immediate_data_length = skb->len;
2027         dev_consume_skb_any(skb);
2028 }
2029
2030 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2031 {
2032         struct ehea_port *port = netdev_priv(dev);
2033         struct ehea_swqe *swqe;
2034         u32 lkey;
2035         int swqe_index;
2036         struct ehea_port_res *pr;
2037         struct netdev_queue *txq;
2038
2039         pr = &port->port_res[skb_get_queue_mapping(skb)];
2040         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2041
2042         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2043         memset(swqe, 0, SWQE_HEADER_SIZE);
2044         atomic_dec(&pr->swqe_avail);
2045
2046         if (skb_vlan_tag_present(skb)) {
2047                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2048                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2049         }
2050
2051         pr->tx_packets++;
2052         pr->tx_bytes += skb->len;
2053
2054         if (skb->len <= SWQE3_MAX_IMM) {
2055                 u32 sig_iv = port->sig_comp_iv;
2056                 u32 swqe_num = pr->swqe_id_counter;
2057                 ehea_xmit3(skb, dev, swqe);
2058                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2059                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2060                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2061                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2062                                                       sig_iv);
2063                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2064                         pr->swqe_ll_count = 0;
2065                 } else
2066                         pr->swqe_ll_count += 1;
2067         } else {
2068                 swqe->wr_id =
2069                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2070                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2071                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2072                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2073                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2074
2075                 pr->sq_skba.index++;
2076                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2077
2078                 lkey = pr->send_mr.lkey;
2079                 ehea_xmit2(skb, dev, swqe, lkey);
2080                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2081         }
2082         pr->swqe_id_counter += 1;
2083
2084         netif_info(port, tx_queued, dev,
2085                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2086         if (netif_msg_tx_queued(port))
2087                 ehea_dump(swqe, 512, "swqe");
2088
2089         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2090                 netif_tx_stop_queue(txq);
2091                 swqe->tx_control |= EHEA_SWQE_PURGE;
2092         }
2093
2094         ehea_post_swqe(pr->qp, swqe);
2095
2096         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2097                 pr->p_stats.queue_stopped++;
2098                 netif_tx_stop_queue(txq);
2099         }
2100
2101         return NETDEV_TX_OK;
2102 }
2103
2104 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2105 {
2106         struct ehea_port *port = netdev_priv(dev);
2107         struct ehea_adapter *adapter = port->adapter;
2108         struct hcp_ehea_port_cb1 *cb1;
2109         int index;
2110         u64 hret;
2111         int err = 0;
2112
2113         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2114         if (!cb1) {
2115                 pr_err("no mem for cb1\n");
2116                 err = -ENOMEM;
2117                 goto out;
2118         }
2119
2120         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2121                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2122         if (hret != H_SUCCESS) {
2123                 pr_err("query_ehea_port failed\n");
2124                 err = -EINVAL;
2125                 goto out;
2126         }
2127
2128         index = (vid / 64);
2129         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2130
2131         hret = ehea_h_modify_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("modify_ehea_port failed\n");
2135                 err = -EINVAL;
2136         }
2137 out:
2138         free_page((unsigned long)cb1);
2139         return err;
2140 }
2141
2142 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2143 {
2144         struct ehea_port *port = netdev_priv(dev);
2145         struct ehea_adapter *adapter = port->adapter;
2146         struct hcp_ehea_port_cb1 *cb1;
2147         int index;
2148         u64 hret;
2149         int err = 0;
2150
2151         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2152         if (!cb1) {
2153                 pr_err("no mem for cb1\n");
2154                 err = -ENOMEM;
2155                 goto out;
2156         }
2157
2158         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2159                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2160         if (hret != H_SUCCESS) {
2161                 pr_err("query_ehea_port failed\n");
2162                 err = -EINVAL;
2163                 goto out;
2164         }
2165
2166         index = (vid / 64);
2167         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2168
2169         hret = ehea_h_modify_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("modify_ehea_port failed\n");
2173                 err = -EINVAL;
2174         }
2175 out:
2176         free_page((unsigned long)cb1);
2177         return err;
2178 }
2179
2180 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2181 {
2182         int ret = -EIO;
2183         u64 hret;
2184         u16 dummy16 = 0;
2185         u64 dummy64 = 0;
2186         struct hcp_modify_qp_cb0 *cb0;
2187
2188         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2189         if (!cb0) {
2190                 ret = -ENOMEM;
2191                 goto out;
2192         }
2193
2194         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2195                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2196         if (hret != H_SUCCESS) {
2197                 pr_err("query_ehea_qp failed (1)\n");
2198                 goto out;
2199         }
2200
2201         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2202         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2203                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2204                                      &dummy64, &dummy64, &dummy16, &dummy16);
2205         if (hret != H_SUCCESS) {
2206                 pr_err("modify_ehea_qp failed (1)\n");
2207                 goto out;
2208         }
2209
2210         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2211                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2212         if (hret != H_SUCCESS) {
2213                 pr_err("query_ehea_qp failed (2)\n");
2214                 goto out;
2215         }
2216
2217         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2218         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2219                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2220                                      &dummy64, &dummy64, &dummy16, &dummy16);
2221         if (hret != H_SUCCESS) {
2222                 pr_err("modify_ehea_qp failed (2)\n");
2223                 goto out;
2224         }
2225
2226         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2227                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2228         if (hret != H_SUCCESS) {
2229                 pr_err("query_ehea_qp failed (3)\n");
2230                 goto out;
2231         }
2232
2233         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2234         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2235                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2236                                      &dummy64, &dummy64, &dummy16, &dummy16);
2237         if (hret != H_SUCCESS) {
2238                 pr_err("modify_ehea_qp failed (3)\n");
2239                 goto out;
2240         }
2241
2242         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2243                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2244         if (hret != H_SUCCESS) {
2245                 pr_err("query_ehea_qp failed (4)\n");
2246                 goto out;
2247         }
2248
2249         ret = 0;
2250 out:
2251         free_page((unsigned long)cb0);
2252         return ret;
2253 }
2254
2255 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2256 {
2257         int ret, i;
2258         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2259         enum ehea_eq_type eq_type = EHEA_EQ;
2260
2261         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2262                                    EHEA_MAX_ENTRIES_EQ, 1);
2263         if (!port->qp_eq) {
2264                 ret = -EINVAL;
2265                 pr_err("ehea_create_eq failed (qp_eq)\n");
2266                 goto out_kill_eq;
2267         }
2268
2269         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2270         pr_cfg.max_entries_scq = sq_entries * 2;
2271         pr_cfg.max_entries_sq = sq_entries;
2272         pr_cfg.max_entries_rq1 = rq1_entries;
2273         pr_cfg.max_entries_rq2 = rq2_entries;
2274         pr_cfg.max_entries_rq3 = rq3_entries;
2275
2276         pr_cfg_small_rx.max_entries_rcq = 1;
2277         pr_cfg_small_rx.max_entries_scq = sq_entries;
2278         pr_cfg_small_rx.max_entries_sq = sq_entries;
2279         pr_cfg_small_rx.max_entries_rq1 = 1;
2280         pr_cfg_small_rx.max_entries_rq2 = 1;
2281         pr_cfg_small_rx.max_entries_rq3 = 1;
2282
2283         for (i = 0; i < def_qps; i++) {
2284                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2285                 if (ret)
2286                         goto out_clean_pr;
2287         }
2288         for (i = def_qps; i < def_qps; i++) {
2289                 ret = ehea_init_port_res(port, &port->port_res[i],
2290                                          &pr_cfg_small_rx, i);
2291                 if (ret)
2292                         goto out_clean_pr;
2293         }
2294
2295         return 0;
2296
2297 out_clean_pr:
2298         while (--i >= 0)
2299                 ehea_clean_portres(port, &port->port_res[i]);
2300
2301 out_kill_eq:
2302         ehea_destroy_eq(port->qp_eq);
2303         return ret;
2304 }
2305
2306 static int ehea_clean_all_portres(struct ehea_port *port)
2307 {
2308         int ret = 0;
2309         int i;
2310
2311         for (i = 0; i < port->num_def_qps; i++)
2312                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2313
2314         ret |= ehea_destroy_eq(port->qp_eq);
2315
2316         return ret;
2317 }
2318
2319 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2320 {
2321         if (adapter->active_ports)
2322                 return;
2323
2324         ehea_rem_mr(&adapter->mr);
2325 }
2326
2327 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2328 {
2329         if (adapter->active_ports)
2330                 return 0;
2331
2332         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2333 }
2334
2335 static int ehea_up(struct net_device *dev)
2336 {
2337         int ret, i;
2338         struct ehea_port *port = netdev_priv(dev);
2339
2340         if (port->state == EHEA_PORT_UP)
2341                 return 0;
2342
2343         ret = ehea_port_res_setup(port, port->num_def_qps);
2344         if (ret) {
2345                 netdev_err(dev, "port_res_failed\n");
2346                 goto out;
2347         }
2348
2349         /* Set default QP for this port */
2350         ret = ehea_configure_port(port);
2351         if (ret) {
2352                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2353                 goto out_clean_pr;
2354         }
2355
2356         ret = ehea_reg_interrupts(dev);
2357         if (ret) {
2358                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2359                 goto out_clean_pr;
2360         }
2361
2362         for (i = 0; i < port->num_def_qps; i++) {
2363                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2364                 if (ret) {
2365                         netdev_err(dev, "activate_qp failed\n");
2366                         goto out_free_irqs;
2367                 }
2368         }
2369
2370         for (i = 0; i < port->num_def_qps; i++) {
2371                 ret = ehea_fill_port_res(&port->port_res[i]);
2372                 if (ret) {
2373                         netdev_err(dev, "out_free_irqs\n");
2374                         goto out_free_irqs;
2375                 }
2376         }
2377
2378         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2379         if (ret) {
2380                 ret = -EIO;
2381                 goto out_free_irqs;
2382         }
2383
2384         port->state = EHEA_PORT_UP;
2385
2386         ret = 0;
2387         goto out;
2388
2389 out_free_irqs:
2390         ehea_free_interrupts(dev);
2391
2392 out_clean_pr:
2393         ehea_clean_all_portres(port);
2394 out:
2395         if (ret)
2396                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2397
2398         ehea_update_bcmc_registrations();
2399         ehea_update_firmware_handles();
2400
2401         return ret;
2402 }
2403
2404 static void port_napi_disable(struct ehea_port *port)
2405 {
2406         int i;
2407
2408         for (i = 0; i < port->num_def_qps; i++)
2409                 napi_disable(&port->port_res[i].napi);
2410 }
2411
2412 static void port_napi_enable(struct ehea_port *port)
2413 {
2414         int i;
2415
2416         for (i = 0; i < port->num_def_qps; i++)
2417                 napi_enable(&port->port_res[i].napi);
2418 }
2419
2420 static int ehea_open(struct net_device *dev)
2421 {
2422         int ret;
2423         struct ehea_port *port = netdev_priv(dev);
2424
2425         mutex_lock(&port->port_lock);
2426
2427         netif_info(port, ifup, dev, "enabling port\n");
2428
2429         netif_carrier_off(dev);
2430
2431         ret = ehea_up(dev);
2432         if (!ret) {
2433                 port_napi_enable(port);
2434                 netif_tx_start_all_queues(dev);
2435         }
2436
2437         mutex_unlock(&port->port_lock);
2438         schedule_delayed_work(&port->stats_work,
2439                               round_jiffies_relative(msecs_to_jiffies(1000)));
2440
2441         return ret;
2442 }
2443
2444 static int ehea_down(struct net_device *dev)
2445 {
2446         int ret;
2447         struct ehea_port *port = netdev_priv(dev);
2448
2449         if (port->state == EHEA_PORT_DOWN)
2450                 return 0;
2451
2452         ehea_drop_multicast_list(dev);
2453         ehea_allmulti(dev, 0);
2454         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2455
2456         ehea_free_interrupts(dev);
2457
2458         port->state = EHEA_PORT_DOWN;
2459
2460         ehea_update_bcmc_registrations();
2461
2462         ret = ehea_clean_all_portres(port);
2463         if (ret)
2464                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2465
2466         ehea_update_firmware_handles();
2467
2468         return ret;
2469 }
2470
2471 static int ehea_stop(struct net_device *dev)
2472 {
2473         int ret;
2474         struct ehea_port *port = netdev_priv(dev);
2475
2476         netif_info(port, ifdown, dev, "disabling port\n");
2477
2478         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2479         cancel_work_sync(&port->reset_task);
2480         cancel_delayed_work_sync(&port->stats_work);
2481         mutex_lock(&port->port_lock);
2482         netif_tx_stop_all_queues(dev);
2483         port_napi_disable(port);
2484         ret = ehea_down(dev);
2485         mutex_unlock(&port->port_lock);
2486         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2487         return ret;
2488 }
2489
2490 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2491 {
2492         struct ehea_qp qp = *orig_qp;
2493         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2494         struct ehea_swqe *swqe;
2495         int wqe_index;
2496         int i;
2497
2498         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2499                 swqe = ehea_get_swqe(&qp, &wqe_index);
2500                 swqe->tx_control |= EHEA_SWQE_PURGE;
2501         }
2502 }
2503
2504 static void ehea_flush_sq(struct ehea_port *port)
2505 {
2506         int i;
2507
2508         for (i = 0; i < port->num_def_qps; i++) {
2509                 struct ehea_port_res *pr = &port->port_res[i];
2510                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2511                 int ret;
2512
2513                 ret = wait_event_timeout(port->swqe_avail_wq,
2514                          atomic_read(&pr->swqe_avail) >= swqe_max,
2515                          msecs_to_jiffies(100));
2516
2517                 if (!ret) {
2518                         pr_err("WARNING: sq not flushed completely\n");
2519                         break;
2520                 }
2521         }
2522 }
2523
2524 static int ehea_stop_qps(struct net_device *dev)
2525 {
2526         struct ehea_port *port = netdev_priv(dev);
2527         struct ehea_adapter *adapter = port->adapter;
2528         struct hcp_modify_qp_cb0 *cb0;
2529         int ret = -EIO;
2530         int dret;
2531         int i;
2532         u64 hret;
2533         u64 dummy64 = 0;
2534         u16 dummy16 = 0;
2535
2536         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2537         if (!cb0) {
2538                 ret = -ENOMEM;
2539                 goto out;
2540         }
2541
2542         for (i = 0; i < (port->num_def_qps); i++) {
2543                 struct ehea_port_res *pr =  &port->port_res[i];
2544                 struct ehea_qp *qp = pr->qp;
2545
2546                 /* Purge send queue */
2547                 ehea_purge_sq(qp);
2548
2549                 /* Disable queue pair */
2550                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2551                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2552                                             cb0);
2553                 if (hret != H_SUCCESS) {
2554                         pr_err("query_ehea_qp failed (1)\n");
2555                         goto out;
2556                 }
2557
2558                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2559                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2560
2561                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2563                                                             1), cb0, &dummy64,
2564                                              &dummy64, &dummy16, &dummy16);
2565                 if (hret != H_SUCCESS) {
2566                         pr_err("modify_ehea_qp failed (1)\n");
2567                         goto out;
2568                 }
2569
2570                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2571                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2572                                             cb0);
2573                 if (hret != H_SUCCESS) {
2574                         pr_err("query_ehea_qp failed (2)\n");
2575                         goto out;
2576                 }
2577
2578                 /* deregister shared memory regions */
2579                 dret = ehea_rem_smrs(pr);
2580                 if (dret) {
2581                         pr_err("unreg shared memory region failed\n");
2582                         goto out;
2583                 }
2584         }
2585
2586         ret = 0;
2587 out:
2588         free_page((unsigned long)cb0);
2589
2590         return ret;
2591 }
2592
2593 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2594 {
2595         struct ehea_qp qp = *orig_qp;
2596         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2597         struct ehea_rwqe *rwqe;
2598         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2599         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2600         struct sk_buff *skb;
2601         u32 lkey = pr->recv_mr.lkey;
2602
2603
2604         int i;
2605         int index;
2606
2607         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2608                 rwqe = ehea_get_next_rwqe(&qp, 2);
2609                 rwqe->sg_list[0].l_key = lkey;
2610                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2611                 skb = skba_rq2[index];
2612                 if (skb)
2613                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2614         }
2615
2616         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2617                 rwqe = ehea_get_next_rwqe(&qp, 3);
2618                 rwqe->sg_list[0].l_key = lkey;
2619                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2620                 skb = skba_rq3[index];
2621                 if (skb)
2622                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2623         }
2624 }
2625
2626 static int ehea_restart_qps(struct net_device *dev)
2627 {
2628         struct ehea_port *port = netdev_priv(dev);
2629         struct ehea_adapter *adapter = port->adapter;
2630         int ret = 0;
2631         int i;
2632
2633         struct hcp_modify_qp_cb0 *cb0;
2634         u64 hret;
2635         u64 dummy64 = 0;
2636         u16 dummy16 = 0;
2637
2638         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2639         if (!cb0)
2640                 return -ENOMEM;
2641
2642         for (i = 0; i < (port->num_def_qps); i++) {
2643                 struct ehea_port_res *pr =  &port->port_res[i];
2644                 struct ehea_qp *qp = pr->qp;
2645
2646                 ret = ehea_gen_smrs(pr);
2647                 if (ret) {
2648                         netdev_err(dev, "creation of shared memory regions failed\n");
2649                         goto out;
2650                 }
2651
2652                 ehea_update_rqs(qp, pr);
2653
2654                 /* Enable queue pair */
2655                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2656                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2657                                             cb0);
2658                 if (hret != H_SUCCESS) {
2659                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2660                         ret = -EFAULT;
2661                         goto out;
2662                 }
2663
2664                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2665                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2666
2667                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2668                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2669                                                             1), cb0, &dummy64,
2670                                              &dummy64, &dummy16, &dummy16);
2671                 if (hret != H_SUCCESS) {
2672                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2673                         ret = -EFAULT;
2674                         goto out;
2675                 }
2676
2677                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2678                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2679                                             cb0);
2680                 if (hret != H_SUCCESS) {
2681                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2682                         ret = -EFAULT;
2683                         goto out;
2684                 }
2685
2686                 /* refill entire queue */
2687                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2688                 ehea_refill_rq2(pr, 0);
2689                 ehea_refill_rq3(pr, 0);
2690         }
2691 out:
2692         free_page((unsigned long)cb0);
2693
2694         return ret;
2695 }
2696
2697 static void ehea_reset_port(struct work_struct *work)
2698 {
2699         int ret;
2700         struct ehea_port *port =
2701                 container_of(work, struct ehea_port, reset_task);
2702         struct net_device *dev = port->netdev;
2703
2704         mutex_lock(&dlpar_mem_lock);
2705         port->resets++;
2706         mutex_lock(&port->port_lock);
2707         netif_tx_disable(dev);
2708
2709         port_napi_disable(port);
2710
2711         ehea_down(dev);
2712
2713         ret = ehea_up(dev);
2714         if (ret)
2715                 goto out;
2716
2717         ehea_set_multicast_list(dev);
2718
2719         netif_info(port, timer, dev, "reset successful\n");
2720
2721         port_napi_enable(port);
2722
2723         netif_tx_wake_all_queues(dev);
2724 out:
2725         mutex_unlock(&port->port_lock);
2726         mutex_unlock(&dlpar_mem_lock);
2727 }
2728
2729 static void ehea_rereg_mrs(void)
2730 {
2731         int ret, i;
2732         struct ehea_adapter *adapter;
2733
2734         pr_info("LPAR memory changed - re-initializing driver\n");
2735
2736         list_for_each_entry(adapter, &adapter_list, list)
2737                 if (adapter->active_ports) {
2738                         /* Shutdown all ports */
2739                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2740                                 struct ehea_port *port = adapter->port[i];
2741                                 struct net_device *dev;
2742
2743                                 if (!port)
2744                                         continue;
2745
2746                                 dev = port->netdev;
2747
2748                                 if (dev->flags & IFF_UP) {
2749                                         mutex_lock(&port->port_lock);
2750                                         netif_tx_disable(dev);
2751                                         ehea_flush_sq(port);
2752                                         ret = ehea_stop_qps(dev);
2753                                         if (ret) {
2754                                                 mutex_unlock(&port->port_lock);
2755                                                 goto out;
2756                                         }
2757                                         port_napi_disable(port);
2758                                         mutex_unlock(&port->port_lock);
2759                                 }
2760                                 reset_sq_restart_flag(port);
2761                         }
2762
2763                         /* Unregister old memory region */
2764                         ret = ehea_rem_mr(&adapter->mr);
2765                         if (ret) {
2766                                 pr_err("unregister MR failed - driver inoperable!\n");
2767                                 goto out;
2768                         }
2769                 }
2770
2771         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2772
2773         list_for_each_entry(adapter, &adapter_list, list)
2774                 if (adapter->active_ports) {
2775                         /* Register new memory region */
2776                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2777                         if (ret) {
2778                                 pr_err("register MR failed - driver inoperable!\n");
2779                                 goto out;
2780                         }
2781
2782                         /* Restart all ports */
2783                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2784                                 struct ehea_port *port = adapter->port[i];
2785
2786                                 if (port) {
2787                                         struct net_device *dev = port->netdev;
2788
2789                                         if (dev->flags & IFF_UP) {
2790                                                 mutex_lock(&port->port_lock);
2791                                                 ret = ehea_restart_qps(dev);
2792                                                 if (!ret) {
2793                                                         check_sqs(port);
2794                                                         port_napi_enable(port);
2795                                                         netif_tx_wake_all_queues(dev);
2796                                                 } else {
2797                                                         netdev_err(dev, "Unable to restart QPS\n");
2798                                                 }
2799                                                 mutex_unlock(&port->port_lock);
2800                                         }
2801                                 }
2802                         }
2803                 }
2804         pr_info("re-initializing driver complete\n");
2805 out:
2806         return;
2807 }
2808
2809 static void ehea_tx_watchdog(struct net_device *dev)
2810 {
2811         struct ehea_port *port = netdev_priv(dev);
2812
2813         if (netif_carrier_ok(dev) &&
2814             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2815                 ehea_schedule_port_reset(port);
2816 }
2817
2818 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2819 {
2820         struct hcp_query_ehea *cb;
2821         u64 hret;
2822         int ret;
2823
2824         cb = (void *)get_zeroed_page(GFP_KERNEL);
2825         if (!cb) {
2826                 ret = -ENOMEM;
2827                 goto out;
2828         }
2829
2830         hret = ehea_h_query_ehea(adapter->handle, cb);
2831
2832         if (hret != H_SUCCESS) {
2833                 ret = -EIO;
2834                 goto out_herr;
2835         }
2836
2837         adapter->max_mc_mac = cb->max_mc_mac - 1;
2838         ret = 0;
2839
2840 out_herr:
2841         free_page((unsigned long)cb);
2842 out:
2843         return ret;
2844 }
2845
2846 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2847 {
2848         struct hcp_ehea_port_cb4 *cb4;
2849         u64 hret;
2850         int ret = 0;
2851
2852         *jumbo = 0;
2853
2854         /* (Try to) enable *jumbo frames */
2855         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2856         if (!cb4) {
2857                 pr_err("no mem for cb4\n");
2858                 ret = -ENOMEM;
2859                 goto out;
2860         } else {
2861                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2862                                               port->logical_port_id,
2863                                               H_PORT_CB4,
2864                                               H_PORT_CB4_JUMBO, cb4);
2865                 if (hret == H_SUCCESS) {
2866                         if (cb4->jumbo_frame)
2867                                 *jumbo = 1;
2868                         else {
2869                                 cb4->jumbo_frame = 1;
2870                                 hret = ehea_h_modify_ehea_port(port->adapter->
2871                                                                handle,
2872                                                                port->
2873                                                                logical_port_id,
2874                                                                H_PORT_CB4,
2875                                                                H_PORT_CB4_JUMBO,
2876                                                                cb4);
2877                                 if (hret == H_SUCCESS)
2878                                         *jumbo = 1;
2879                         }
2880                 } else
2881                         ret = -EINVAL;
2882
2883                 free_page((unsigned long)cb4);
2884         }
2885 out:
2886         return ret;
2887 }
2888
2889 static ssize_t ehea_show_port_id(struct device *dev,
2890                                  struct device_attribute *attr, char *buf)
2891 {
2892         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2893         return sprintf(buf, "%d", port->logical_port_id);
2894 }
2895
2896 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2897
2898 static void logical_port_release(struct device *dev)
2899 {
2900         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2901         of_node_put(port->ofdev.dev.of_node);
2902 }
2903
2904 static struct device *ehea_register_port(struct ehea_port *port,
2905                                          struct device_node *dn)
2906 {
2907         int ret;
2908
2909         port->ofdev.dev.of_node = of_node_get(dn);
2910         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2911         port->ofdev.dev.bus = &ibmebus_bus_type;
2912
2913         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2914         port->ofdev.dev.release = logical_port_release;
2915
2916         ret = of_device_register(&port->ofdev);
2917         if (ret) {
2918                 pr_err("failed to register device. ret=%d\n", ret);
2919                 put_device(&port->ofdev.dev);
2920                 goto out;
2921         }
2922
2923         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2924         if (ret) {
2925                 pr_err("failed to register attributes, ret=%d\n", ret);
2926                 goto out_unreg_of_dev;
2927         }
2928
2929         return &port->ofdev.dev;
2930
2931 out_unreg_of_dev:
2932         of_device_unregister(&port->ofdev);
2933 out:
2934         return NULL;
2935 }
2936
2937 static void ehea_unregister_port(struct ehea_port *port)
2938 {
2939         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2940         of_device_unregister(&port->ofdev);
2941 }
2942
2943 static const struct net_device_ops ehea_netdev_ops = {
2944         .ndo_open               = ehea_open,
2945         .ndo_stop               = ehea_stop,
2946         .ndo_start_xmit         = ehea_start_xmit,
2947         .ndo_get_stats64        = ehea_get_stats64,
2948         .ndo_set_mac_address    = ehea_set_mac_addr,
2949         .ndo_validate_addr      = eth_validate_addr,
2950         .ndo_set_rx_mode        = ehea_set_multicast_list,
2951         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2952         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2953         .ndo_tx_timeout         = ehea_tx_watchdog,
2954 };
2955
2956 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2957                                          u32 logical_port_id,
2958                                          struct device_node *dn)
2959 {
2960         int ret;
2961         struct net_device *dev;
2962         struct ehea_port *port;
2963         struct device *port_dev;
2964         int jumbo;
2965
2966         /* allocate memory for the port structures */
2967         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2968
2969         if (!dev) {
2970                 ret = -ENOMEM;
2971                 goto out_err;
2972         }
2973
2974         port = netdev_priv(dev);
2975
2976         mutex_init(&port->port_lock);
2977         port->state = EHEA_PORT_DOWN;
2978         port->sig_comp_iv = sq_entries / 10;
2979
2980         port->adapter = adapter;
2981         port->netdev = dev;
2982         port->logical_port_id = logical_port_id;
2983
2984         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2985
2986         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2987         if (!port->mc_list) {
2988                 ret = -ENOMEM;
2989                 goto out_free_ethdev;
2990         }
2991
2992         INIT_LIST_HEAD(&port->mc_list->list);
2993
2994         ret = ehea_sense_port_attr(port);
2995         if (ret)
2996                 goto out_free_mc_list;
2997
2998         netif_set_real_num_rx_queues(dev, port->num_def_qps);
2999         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3000
3001         port_dev = ehea_register_port(port, dn);
3002         if (!port_dev)
3003                 goto out_free_mc_list;
3004
3005         SET_NETDEV_DEV(dev, port_dev);
3006
3007         /* initialize net_device structure */
3008         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3009
3010         dev->netdev_ops = &ehea_netdev_ops;
3011         ehea_set_ethtool_ops(dev);
3012
3013         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3014                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3015         dev->features = NETIF_F_SG | NETIF_F_TSO |
3016                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3017                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3018                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3019         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3020                         NETIF_F_IP_CSUM;
3021         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3022
3023         /* MTU range: 68 - 9022 */
3024         dev->min_mtu = ETH_MIN_MTU;
3025         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3026
3027         INIT_WORK(&port->reset_task, ehea_reset_port);
3028         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3029
3030         init_waitqueue_head(&port->swqe_avail_wq);
3031         init_waitqueue_head(&port->restart_wq);
3032
3033         ret = register_netdev(dev);
3034         if (ret) {
3035                 pr_err("register_netdev failed. ret=%d\n", ret);
3036                 goto out_unreg_port;
3037         }
3038
3039         ret = ehea_get_jumboframe_status(port, &jumbo);
3040         if (ret)
3041                 netdev_err(dev, "failed determining jumbo frame status\n");
3042
3043         netdev_info(dev, "Jumbo frames are %sabled\n",
3044                     jumbo == 1 ? "en" : "dis");
3045
3046         adapter->active_ports++;
3047
3048         return port;
3049
3050 out_unreg_port:
3051         ehea_unregister_port(port);
3052
3053 out_free_mc_list:
3054         kfree(port->mc_list);
3055
3056 out_free_ethdev:
3057         free_netdev(dev);
3058
3059 out_err:
3060         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3061                logical_port_id, ret);
3062         return NULL;
3063 }
3064
3065 static void ehea_shutdown_single_port(struct ehea_port *port)
3066 {
3067         struct ehea_adapter *adapter = port->adapter;
3068
3069         cancel_work_sync(&port->reset_task);
3070         cancel_delayed_work_sync(&port->stats_work);
3071         unregister_netdev(port->netdev);
3072         ehea_unregister_port(port);
3073         kfree(port->mc_list);
3074         free_netdev(port->netdev);
3075         adapter->active_ports--;
3076 }
3077
3078 static int ehea_setup_ports(struct ehea_adapter *adapter)
3079 {
3080         struct device_node *lhea_dn;
3081         struct device_node *eth_dn = NULL;
3082
3083         const u32 *dn_log_port_id;
3084         int i = 0;
3085
3086         lhea_dn = adapter->ofdev->dev.of_node;
3087         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3088
3089                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3090                                                  NULL);
3091                 if (!dn_log_port_id) {
3092                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3093                         continue;
3094                 }
3095
3096                 if (ehea_add_adapter_mr(adapter)) {
3097                         pr_err("creating MR failed\n");
3098                         of_node_put(eth_dn);
3099                         return -EIO;
3100                 }
3101
3102                 adapter->port[i] = ehea_setup_single_port(adapter,
3103                                                           *dn_log_port_id,
3104                                                           eth_dn);
3105                 if (adapter->port[i])
3106                         netdev_info(adapter->port[i]->netdev,
3107                                     "logical port id #%d\n", *dn_log_port_id);
3108                 else
3109                         ehea_remove_adapter_mr(adapter);
3110
3111                 i++;
3112         }
3113         return 0;
3114 }
3115
3116 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3117                                            u32 logical_port_id)
3118 {
3119         struct device_node *lhea_dn;
3120         struct device_node *eth_dn = NULL;
3121         const u32 *dn_log_port_id;
3122
3123         lhea_dn = adapter->ofdev->dev.of_node;
3124         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3125
3126                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3127                                                  NULL);
3128                 if (dn_log_port_id)
3129                         if (*dn_log_port_id == logical_port_id)
3130                                 return eth_dn;
3131         }
3132
3133         return NULL;
3134 }
3135
3136 static ssize_t ehea_probe_port(struct device *dev,
3137                                struct device_attribute *attr,
3138                                const char *buf, size_t count)
3139 {
3140         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3141         struct ehea_port *port;
3142         struct device_node *eth_dn = NULL;
3143         int i;
3144
3145         u32 logical_port_id;
3146
3147         sscanf(buf, "%d", &logical_port_id);
3148
3149         port = ehea_get_port(adapter, logical_port_id);
3150
3151         if (port) {
3152                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3153                             logical_port_id);
3154                 return -EINVAL;
3155         }
3156
3157         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3158
3159         if (!eth_dn) {
3160                 pr_info("no logical port with id %d found\n", logical_port_id);
3161                 return -EINVAL;
3162         }
3163
3164         if (ehea_add_adapter_mr(adapter)) {
3165                 pr_err("creating MR failed\n");
3166                 of_node_put(eth_dn);
3167                 return -EIO;
3168         }
3169
3170         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3171
3172         of_node_put(eth_dn);
3173
3174         if (port) {
3175                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3176                         if (!adapter->port[i]) {
3177                                 adapter->port[i] = port;
3178                                 break;
3179                         }
3180
3181                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3182                             logical_port_id);
3183         } else {
3184                 ehea_remove_adapter_mr(adapter);
3185                 return -EIO;
3186         }
3187
3188         return (ssize_t) count;
3189 }
3190
3191 static ssize_t ehea_remove_port(struct device *dev,
3192                                 struct device_attribute *attr,
3193                                 const char *buf, size_t count)
3194 {
3195         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3196         struct ehea_port *port;
3197         int i;
3198         u32 logical_port_id;
3199
3200         sscanf(buf, "%d", &logical_port_id);
3201
3202         port = ehea_get_port(adapter, logical_port_id);
3203
3204         if (port) {
3205                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3206                             logical_port_id);
3207
3208                 ehea_shutdown_single_port(port);
3209
3210                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3211                         if (adapter->port[i] == port) {
3212                                 adapter->port[i] = NULL;
3213                                 break;
3214                         }
3215         } else {
3216                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3217                        logical_port_id);
3218                 return -EINVAL;
3219         }
3220
3221         ehea_remove_adapter_mr(adapter);
3222
3223         return (ssize_t) count;
3224 }
3225
3226 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3227 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3228
3229 static int ehea_create_device_sysfs(struct platform_device *dev)
3230 {
3231         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3232         if (ret)
3233                 goto out;
3234
3235         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3236 out:
3237         return ret;
3238 }
3239
3240 static void ehea_remove_device_sysfs(struct platform_device *dev)
3241 {
3242         device_remove_file(&dev->dev, &dev_attr_probe_port);
3243         device_remove_file(&dev->dev, &dev_attr_remove_port);
3244 }
3245
3246 static int ehea_reboot_notifier(struct notifier_block *nb,
3247                                 unsigned long action, void *unused)
3248 {
3249         if (action == SYS_RESTART) {
3250                 pr_info("Reboot: freeing all eHEA resources\n");
3251                 ibmebus_unregister_driver(&ehea_driver);
3252         }
3253         return NOTIFY_DONE;
3254 }
3255
3256 static struct notifier_block ehea_reboot_nb = {
3257         .notifier_call = ehea_reboot_notifier,
3258 };
3259
3260 static int ehea_mem_notifier(struct notifier_block *nb,
3261                              unsigned long action, void *data)
3262 {
3263         int ret = NOTIFY_BAD;
3264         struct memory_notify *arg = data;
3265
3266         mutex_lock(&dlpar_mem_lock);
3267
3268         switch (action) {
3269         case MEM_CANCEL_OFFLINE:
3270                 pr_info("memory offlining canceled");
3271                 /* Fall through: re-add canceled memory block */
3272
3273         case MEM_ONLINE:
3274                 pr_info("memory is going online");
3275                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3276                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3277                         goto out_unlock;
3278                 ehea_rereg_mrs();
3279                 break;
3280
3281         case MEM_GOING_OFFLINE:
3282                 pr_info("memory is going offline");
3283                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3284                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3285                         goto out_unlock;
3286                 ehea_rereg_mrs();
3287                 break;
3288
3289         default:
3290                 break;
3291         }
3292
3293         ehea_update_firmware_handles();
3294         ret = NOTIFY_OK;
3295
3296 out_unlock:
3297         mutex_unlock(&dlpar_mem_lock);
3298         return ret;
3299 }
3300
3301 static struct notifier_block ehea_mem_nb = {
3302         .notifier_call = ehea_mem_notifier,
3303 };
3304
3305 static void ehea_crash_handler(void)
3306 {
3307         int i;
3308
3309         if (ehea_fw_handles.arr)
3310                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3311                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3312                                              ehea_fw_handles.arr[i].fwh,
3313                                              FORCE_FREE);
3314
3315         if (ehea_bcmc_regs.arr)
3316                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3317                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3318                                               ehea_bcmc_regs.arr[i].port_id,
3319                                               ehea_bcmc_regs.arr[i].reg_type,
3320                                               ehea_bcmc_regs.arr[i].macaddr,
3321                                               0, H_DEREG_BCMC);
3322 }
3323
3324 static atomic_t ehea_memory_hooks_registered;
3325
3326 /* Register memory hooks on probe of first adapter */
3327 static int ehea_register_memory_hooks(void)
3328 {
3329         int ret = 0;
3330
3331         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3332                 return 0;
3333
3334         ret = ehea_create_busmap();
3335         if (ret) {
3336                 pr_info("ehea_create_busmap failed\n");
3337                 goto out;
3338         }
3339
3340         ret = register_reboot_notifier(&ehea_reboot_nb);
3341         if (ret) {
3342                 pr_info("register_reboot_notifier failed\n");
3343                 goto out;
3344         }
3345
3346         ret = register_memory_notifier(&ehea_mem_nb);
3347         if (ret) {
3348                 pr_info("register_memory_notifier failed\n");
3349                 goto out2;
3350         }
3351
3352         ret = crash_shutdown_register(ehea_crash_handler);
3353         if (ret) {
3354                 pr_info("crash_shutdown_register failed\n");
3355                 goto out3;
3356         }
3357
3358         return 0;
3359
3360 out3:
3361         unregister_memory_notifier(&ehea_mem_nb);
3362 out2:
3363         unregister_reboot_notifier(&ehea_reboot_nb);
3364 out:
3365         atomic_dec(&ehea_memory_hooks_registered);
3366         return ret;
3367 }
3368
3369 static void ehea_unregister_memory_hooks(void)
3370 {
3371         /* Only remove the hooks if we've registered them */
3372         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3373                 return;
3374
3375         unregister_reboot_notifier(&ehea_reboot_nb);
3376         if (crash_shutdown_unregister(ehea_crash_handler))
3377                 pr_info("failed unregistering crash handler\n");
3378         unregister_memory_notifier(&ehea_mem_nb);
3379 }
3380
3381 static int ehea_probe_adapter(struct platform_device *dev)
3382 {
3383         struct ehea_adapter *adapter;
3384         const u64 *adapter_handle;
3385         int ret;
3386         int i;
3387
3388         ret = ehea_register_memory_hooks();
3389         if (ret)
3390                 return ret;
3391
3392         if (!dev || !dev->dev.of_node) {
3393                 pr_err("Invalid ibmebus device probed\n");
3394                 return -EINVAL;
3395         }
3396
3397         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3398         if (!adapter) {
3399                 ret = -ENOMEM;
3400                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3401                 goto out;
3402         }
3403
3404         list_add(&adapter->list, &adapter_list);
3405
3406         adapter->ofdev = dev;
3407
3408         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3409                                          NULL);
3410         if (adapter_handle)
3411                 adapter->handle = *adapter_handle;
3412
3413         if (!adapter->handle) {
3414                 dev_err(&dev->dev, "failed getting handle for adapter"
3415                         " '%pOF'\n", dev->dev.of_node);
3416                 ret = -ENODEV;
3417                 goto out_free_ad;
3418         }
3419
3420         adapter->pd = EHEA_PD_ID;
3421
3422         platform_set_drvdata(dev, adapter);
3423
3424
3425         /* initialize adapter and ports */
3426         /* get adapter properties */
3427         ret = ehea_sense_adapter_attr(adapter);
3428         if (ret) {
3429                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3430                 goto out_free_ad;
3431         }
3432
3433         adapter->neq = ehea_create_eq(adapter,
3434                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3435         if (!adapter->neq) {
3436                 ret = -EIO;
3437                 dev_err(&dev->dev, "NEQ creation failed\n");
3438                 goto out_free_ad;
3439         }
3440
3441         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3442                      (unsigned long)adapter);
3443
3444         ret = ehea_create_device_sysfs(dev);
3445         if (ret)
3446                 goto out_kill_eq;
3447
3448         ret = ehea_setup_ports(adapter);
3449         if (ret) {
3450                 dev_err(&dev->dev, "setup_ports failed\n");
3451                 goto out_rem_dev_sysfs;
3452         }
3453
3454         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3455                                   ehea_interrupt_neq, 0,
3456                                   "ehea_neq", adapter);
3457         if (ret) {
3458                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3459                 goto out_shutdown_ports;
3460         }
3461
3462         /* Handle any events that might be pending. */
3463         tasklet_hi_schedule(&adapter->neq_tasklet);
3464
3465         ret = 0;
3466         goto out;
3467
3468 out_shutdown_ports:
3469         for (i = 0; i < EHEA_MAX_PORTS; i++)
3470                 if (adapter->port[i]) {
3471                         ehea_shutdown_single_port(adapter->port[i]);
3472                         adapter->port[i] = NULL;
3473                 }
3474
3475 out_rem_dev_sysfs:
3476         ehea_remove_device_sysfs(dev);
3477
3478 out_kill_eq:
3479         ehea_destroy_eq(adapter->neq);
3480
3481 out_free_ad:
3482         list_del(&adapter->list);
3483
3484 out:
3485         ehea_update_firmware_handles();
3486
3487         return ret;
3488 }
3489
3490 static int ehea_remove(struct platform_device *dev)
3491 {
3492         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3493         int i;
3494
3495         for (i = 0; i < EHEA_MAX_PORTS; i++)
3496                 if (adapter->port[i]) {
3497                         ehea_shutdown_single_port(adapter->port[i]);
3498                         adapter->port[i] = NULL;
3499                 }
3500
3501         ehea_remove_device_sysfs(dev);
3502
3503         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3504         tasklet_kill(&adapter->neq_tasklet);
3505
3506         ehea_destroy_eq(adapter->neq);
3507         ehea_remove_adapter_mr(adapter);
3508         list_del(&adapter->list);
3509
3510         ehea_update_firmware_handles();
3511
3512         return 0;
3513 }
3514
3515 static int check_module_parm(void)
3516 {
3517         int ret = 0;
3518
3519         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3520             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3521                 pr_info("Bad parameter: rq1_entries\n");
3522                 ret = -EINVAL;
3523         }
3524         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3525             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3526                 pr_info("Bad parameter: rq2_entries\n");
3527                 ret = -EINVAL;
3528         }
3529         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3530             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3531                 pr_info("Bad parameter: rq3_entries\n");
3532                 ret = -EINVAL;
3533         }
3534         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3535             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3536                 pr_info("Bad parameter: sq_entries\n");
3537                 ret = -EINVAL;
3538         }
3539
3540         return ret;
3541 }
3542
3543 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3544 {
3545         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3546 }
3547
3548 static DRIVER_ATTR_RO(capabilities);
3549
3550 static int __init ehea_module_init(void)
3551 {
3552         int ret;
3553
3554         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3555
3556         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3557         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3558
3559         mutex_init(&ehea_fw_handles.lock);
3560         spin_lock_init(&ehea_bcmc_regs.lock);
3561
3562         ret = check_module_parm();
3563         if (ret)
3564                 goto out;
3565
3566         ret = ibmebus_register_driver(&ehea_driver);
3567         if (ret) {
3568                 pr_err("failed registering eHEA device driver on ebus\n");
3569                 goto out;
3570         }
3571
3572         ret = driver_create_file(&ehea_driver.driver,
3573                                  &driver_attr_capabilities);
3574         if (ret) {
3575                 pr_err("failed to register capabilities attribute, ret=%d\n",
3576                        ret);
3577                 goto out2;
3578         }
3579
3580         return ret;
3581
3582 out2:
3583         ibmebus_unregister_driver(&ehea_driver);
3584 out:
3585         return ret;
3586 }
3587
3588 static void __exit ehea_module_exit(void)
3589 {
3590         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3591         ibmebus_unregister_driver(&ehea_driver);
3592         ehea_unregister_memory_hooks();
3593         kfree(ehea_fw_handles.arr);
3594         kfree(ehea_bcmc_regs.arr);
3595         ehea_destroy_busmap();
3596 }
3597
3598 module_init(ehea_module_init);
3599 module_exit(ehea_module_exit);