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;
 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                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 787                 memset(swqe, 0, SWQE_HEADER_SIZE);
 788                 atomic_dec(&pr->swqe_avail);
 789
 790                 swqe->tx_control |= EHEA_SWQE_PURGE;
 791                 swqe->wr_id = SWQE_RESTART_CHECK;
 792                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 793                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 794                 swqe->immediate_data_length = 80;
 795
 796                 ehea_post_swqe(pr->qp, swqe);
 797
 798                 ret = wait_event_timeout(port->restart_wq,
 799                                          pr->sq_restart_flag == 0,
 800                                          msecs_to_jiffies(100));
 801
 802                 if (!ret) {
 803                         pr_err("HW/SW queues out of sync\n");
 804                         ehea_schedule_port_reset(pr->port);
 805                         return;
 806                 }
 807         }
 808 }
 809
 810
 811 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 812 {
 813         struct sk_buff *skb;
 814         struct ehea_cq *send_cq = pr->send_cq;
 815         struct ehea_cqe *cqe;
 816         int quota = my_quota;
 817         int cqe_counter = 0;
 818         int swqe_av = 0;
 819         int index;
 820         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 821                                                 pr - &pr->port->port_res[0]);
 822
 823         cqe = ehea_poll_cq(send_cq);
 824         while (cqe && (quota > 0)) {
 825                 ehea_inc_cq(send_cq);
 826
 827                 cqe_counter++;
 828                 rmb();
 829
 830                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 831                         pr->sq_restart_flag = 1;
 832                         swqe_av++;
 833                         break;
 834                 }
 835
 836                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 837                         pr_err("Bad send completion status=0x%04X\n",
 838                                cqe->status);
 839
 840                         if (netif_msg_tx_err(pr->port))
 841                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 842
 843                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 844                                 pr_err("Resetting port\n");
 845                                 ehea_schedule_port_reset(pr->port);
 846                                 break;
 847                         }
 848                 }
 849
 850                 if (netif_msg_tx_done(pr->port))
 851                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 852
 853                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 854                            == EHEA_SWQE2_TYPE)) {
 855
 856                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 857                         skb = pr->sq_skba.arr[index];
 858                         dev_consume_skb_any(skb);
 859                         pr->sq_skba.arr[index] = NULL;
 860                 }
 861
 862                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 863                 quota--;
 864
 865                 cqe = ehea_poll_cq(send_cq);
 866         }
 867
 868         ehea_update_feca(send_cq, cqe_counter);
 869         atomic_add(swqe_av, &pr->swqe_avail);
 870
 871         if (unlikely(netif_tx_queue_stopped(txq) &&
 872                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 873                 __netif_tx_lock(txq, smp_processor_id());
 874                 if (netif_tx_queue_stopped(txq) &&
 875                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 876                         netif_tx_wake_queue(txq);
 877                 __netif_tx_unlock(txq);
 878         }
 879
 880         wake_up(&pr->port->swqe_avail_wq);
 881
 882         return cqe;
 883 }
 884
 885 #define EHEA_POLL_MAX_CQES 65535
 886
 887 static int ehea_poll(struct napi_struct *napi, int budget)
 888 {
 889         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 890                                                 napi);
 891         struct net_device *dev = pr->port->netdev;
 892         struct ehea_cqe *cqe;
 893         struct ehea_cqe *cqe_skb = NULL;
 894         int wqe_index;
 895         int rx = 0;
 896
 897         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 898         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 899
 900         while (rx != budget) {
 901                 napi_complete(napi);
 902                 ehea_reset_cq_ep(pr->recv_cq);
 903                 ehea_reset_cq_ep(pr->send_cq);
 904                 ehea_reset_cq_n1(pr->recv_cq);
 905                 ehea_reset_cq_n1(pr->send_cq);
 906                 rmb();
 907                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 908                 cqe_skb = ehea_poll_cq(pr->send_cq);
 909
 910                 if (!cqe && !cqe_skb)
 911                         return rx;
 912
 913                 if (!napi_reschedule(napi))
 914                         return rx;
 915
 916                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 917                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 918         }
 919
 920         return rx;
 921 }
 922
 923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 924 {
 925         struct ehea_port_res *pr = param;
 926
 927         napi_schedule(&pr->napi);
 928
 929         return IRQ_HANDLED;
 930 }
 931
 932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 933 {
 934         struct ehea_port *port = param;
 935         struct ehea_eqe *eqe;
 936         struct ehea_qp *qp;
 937         u32 qp_token;
 938         u64 resource_type, aer, aerr;
 939         int reset_port = 0;
 940
 941         eqe = ehea_poll_eq(port->qp_eq);
 942
 943         while (eqe) {
 944                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 945                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 946                        eqe->entry, qp_token);
 947
 948                 qp = port->port_res[qp_token].qp;
 949
 950                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 951                                                 &aer, &aerr);
 952
 953                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 954                         if ((aer & EHEA_AER_RESET_MASK) ||
 955                             (aerr & EHEA_AERR_RESET_MASK))
 956                                  reset_port = 1;
 957                 } else
 958                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 959
 960                 eqe = ehea_poll_eq(port->qp_eq);
 961         }
 962
 963         if (reset_port) {
 964                 pr_err("Resetting port\n");
 965                 ehea_schedule_port_reset(port);
 966         }
 967
 968         return IRQ_HANDLED;
 969 }
 970
 971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 972                                        int logical_port)
 973 {
 974         int i;
 975
 976         for (i = 0; i < EHEA_MAX_PORTS; i++)
 977                 if (adapter->port[i])
 978                         if (adapter->port[i]->logical_port_id == logical_port)
 979                                 return adapter->port[i];
 980         return NULL;
 981 }
 982
 983 int ehea_sense_port_attr(struct ehea_port *port)
 984 {
 985         int ret;
 986         u64 hret;
 987         struct hcp_ehea_port_cb0 *cb0;
 988
 989         /* may be called via ehea_neq_tasklet() */
 990         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 991         if (!cb0) {
 992                 pr_err("no mem for cb0\n");
 993                 ret = -ENOMEM;
 994                 goto out;
 995         }
 996
 997         hret = ehea_h_query_ehea_port(port->adapter->handle,
 998                                       port->logical_port_id, H_PORT_CB0,
 999                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1000                                       cb0);
1001         if (hret != H_SUCCESS) {
1002                 ret = -EIO;
1003                 goto out_free;
1004         }
1005
1006         /* MAC address */
1007         port->mac_addr = cb0->port_mac_addr << 16;
1008
1009         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1010                 ret = -EADDRNOTAVAIL;
1011                 goto out_free;
1012         }
1013
1014         /* Port speed */
1015         switch (cb0->port_speed) {
1016         case H_SPEED_10M_H:
1017                 port->port_speed = EHEA_SPEED_10M;
1018                 port->full_duplex = 0;
1019                 break;
1020         case H_SPEED_10M_F:
1021                 port->port_speed = EHEA_SPEED_10M;
1022                 port->full_duplex = 1;
1023                 break;
1024         case H_SPEED_100M_H:
1025                 port->port_speed = EHEA_SPEED_100M;
1026                 port->full_duplex = 0;
1027                 break;
1028         case H_SPEED_100M_F:
1029                 port->port_speed = EHEA_SPEED_100M;
1030                 port->full_duplex = 1;
1031                 break;
1032         case H_SPEED_1G_F:
1033                 port->port_speed = EHEA_SPEED_1G;
1034                 port->full_duplex = 1;
1035                 break;
1036         case H_SPEED_10G_F:
1037                 port->port_speed = EHEA_SPEED_10G;
1038                 port->full_duplex = 1;
1039                 break;
1040         default:
1041                 port->port_speed = 0;
1042                 port->full_duplex = 0;
1043                 break;
1044         }
1045
1046         port->autoneg = 1;
1047         port->num_mcs = cb0->num_default_qps;
1048
1049         /* Number of default QPs */
1050         if (use_mcs)
1051                 port->num_def_qps = cb0->num_default_qps;
1052         else
1053                 port->num_def_qps = 1;
1054
1055         if (!port->num_def_qps) {
1056                 ret = -EINVAL;
1057                 goto out_free;
1058         }
1059
1060         ret = 0;
1061 out_free:
1062         if (ret || netif_msg_probe(port))
1063                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1064         free_page((unsigned long)cb0);
1065 out:
1066         return ret;
1067 }
1068
1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1070 {
1071         struct hcp_ehea_port_cb4 *cb4;
1072         u64 hret;
1073         int ret = 0;
1074
1075         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1076         if (!cb4) {
1077                 pr_err("no mem for cb4\n");
1078                 ret = -ENOMEM;
1079                 goto out;
1080         }
1081
1082         cb4->port_speed = port_speed;
1083
1084         netif_carrier_off(port->netdev);
1085
1086         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1087                                        port->logical_port_id,
1088                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1089         if (hret == H_SUCCESS) {
1090                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1091
1092                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1093                                               port->logical_port_id,
1094                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1095                                               cb4);
1096                 if (hret == H_SUCCESS) {
1097                         switch (cb4->port_speed) {
1098                         case H_SPEED_10M_H:
1099                                 port->port_speed = EHEA_SPEED_10M;
1100                                 port->full_duplex = 0;
1101                                 break;
1102                         case H_SPEED_10M_F:
1103                                 port->port_speed = EHEA_SPEED_10M;
1104                                 port->full_duplex = 1;
1105                                 break;
1106                         case H_SPEED_100M_H:
1107                                 port->port_speed = EHEA_SPEED_100M;
1108                                 port->full_duplex = 0;
1109                                 break;
1110                         case H_SPEED_100M_F:
1111                                 port->port_speed = EHEA_SPEED_100M;
1112                                 port->full_duplex = 1;
1113                                 break;
1114                         case H_SPEED_1G_F:
1115                                 port->port_speed = EHEA_SPEED_1G;
1116                                 port->full_duplex = 1;
1117                                 break;
1118                         case H_SPEED_10G_F:
1119                                 port->port_speed = EHEA_SPEED_10G;
1120                                 port->full_duplex = 1;
1121                                 break;
1122                         default:
1123                                 port->port_speed = 0;
1124                                 port->full_duplex = 0;
1125                                 break;
1126                         }
1127                 } else {
1128                         pr_err("Failed sensing port speed\n");
1129                         ret = -EIO;
1130                 }
1131         } else {
1132                 if (hret == H_AUTHORITY) {
1133                         pr_info("Hypervisor denied setting port speed\n");
1134                         ret = -EPERM;
1135                 } else {
1136                         ret = -EIO;
1137                         pr_err("Failed setting port speed\n");
1138                 }
1139         }
1140         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1141                 netif_carrier_on(port->netdev);
1142
1143         free_page((unsigned long)cb4);
1144 out:
1145         return ret;
1146 }
1147
1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1149 {
1150         int ret;
1151         u8 ec;
1152         u8 portnum;
1153         struct ehea_port *port;
1154         struct net_device *dev;
1155
1156         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1157         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1158         port = ehea_get_port(adapter, portnum);
1159         if (!port) {
1160                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1161                 return;
1162         }
1163         dev = port->netdev;
1164
1165         switch (ec) {
1166         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1167
1168                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1169                         if (!netif_carrier_ok(dev)) {
1170                                 ret = ehea_sense_port_attr(port);
1171                                 if (ret) {
1172                                         netdev_err(dev, "failed resensing port attributes\n");
1173                                         break;
1174                                 }
1175
1176                                 netif_info(port, link, dev,
1177                                            "Logical port up: %dMbps %s Duplex\n",
1178                                            port->port_speed,
1179                                            port->full_duplex == 1 ?
1180                                            "Full" : "Half");
1181
1182                                 netif_carrier_on(dev);
1183                                 netif_wake_queue(dev);
1184                         }
1185                 } else
1186                         if (netif_carrier_ok(dev)) {
1187                                 netif_info(port, link, dev,
1188                                            "Logical port down\n");
1189                                 netif_carrier_off(dev);
1190                                 netif_tx_disable(dev);
1191                         }
1192
1193                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1194                         port->phy_link = EHEA_PHY_LINK_UP;
1195                         netif_info(port, link, dev,
1196                                    "Physical port up\n");
1197                         if (prop_carrier_state)
1198                                 netif_carrier_on(dev);
1199                 } else {
1200                         port->phy_link = EHEA_PHY_LINK_DOWN;
1201                         netif_info(port, link, dev,
1202                                    "Physical port down\n");
1203                         if (prop_carrier_state)
1204                                 netif_carrier_off(dev);
1205                 }
1206
1207                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1208                         netdev_info(dev,
1209                                     "External switch port is primary port\n");
1210                 else
1211                         netdev_info(dev,
1212                                     "External switch port is backup port\n");
1213
1214                 break;
1215         case EHEA_EC_ADAPTER_MALFUNC:
1216                 netdev_err(dev, "Adapter malfunction\n");
1217                 break;
1218         case EHEA_EC_PORT_MALFUNC:
1219                 netdev_info(dev, "Port malfunction\n");
1220                 netif_carrier_off(dev);
1221                 netif_tx_disable(dev);
1222                 break;
1223         default:
1224                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1225                 break;
1226         }
1227 }
1228
1229 static void ehea_neq_tasklet(unsigned long data)
1230 {
1231         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1232         struct ehea_eqe *eqe;
1233         u64 event_mask;
1234
1235         eqe = ehea_poll_eq(adapter->neq);
1236         pr_debug("eqe=%p\n", eqe);
1237
1238         while (eqe) {
1239                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1240                 ehea_parse_eqe(adapter, eqe->entry);
1241                 eqe = ehea_poll_eq(adapter->neq);
1242                 pr_debug("next eqe=%p\n", eqe);
1243         }
1244
1245         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1246                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1247                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1248
1249         ehea_h_reset_events(adapter->handle,
1250                             adapter->neq->fw_handle, event_mask);
1251 }
1252
1253 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1254 {
1255         struct ehea_adapter *adapter = param;
1256         tasklet_hi_schedule(&adapter->neq_tasklet);
1257         return IRQ_HANDLED;
1258 }
1259
1260
1261 static int ehea_fill_port_res(struct ehea_port_res *pr)
1262 {
1263         int ret;
1264         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1265
1266         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1267
1268         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1269
1270         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1271
1272         return ret;
1273 }
1274
1275 static int ehea_reg_interrupts(struct net_device *dev)
1276 {
1277         struct ehea_port *port = netdev_priv(dev);
1278         struct ehea_port_res *pr;
1279         int i, ret;
1280
1281
1282         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1283                  dev->name);
1284
1285         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1286                                   ehea_qp_aff_irq_handler,
1287                                   0, port->int_aff_name, port);
1288         if (ret) {
1289                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1290                            port->qp_eq->attr.ist1);
1291                 goto out_free_qpeq;
1292         }
1293
1294         netif_info(port, ifup, dev,
1295                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1296                    port->qp_eq->attr.ist1);
1297
1298
1299         for (i = 0; i < port->num_def_qps; i++) {
1300                 pr = &port->port_res[i];
1301                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1302                          "%s-queue%d", dev->name, i);
1303                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1304                                           ehea_recv_irq_handler,
1305                                           0, pr->int_send_name, pr);
1306                 if (ret) {
1307                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1308                                    i, pr->eq->attr.ist1);
1309                         goto out_free_req;
1310                 }
1311                 netif_info(port, ifup, dev,
1312                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1313                            pr->eq->attr.ist1, i);
1314         }
1315 out:
1316         return ret;
1317
1318
1319 out_free_req:
1320         while (--i >= 0) {
1321                 u32 ist = port->port_res[i].eq->attr.ist1;
1322                 ibmebus_free_irq(ist, &port->port_res[i]);
1323         }
1324
1325 out_free_qpeq:
1326         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1327         i = port->num_def_qps;
1328
1329         goto out;
1330
1331 }
1332
1333 static void ehea_free_interrupts(struct net_device *dev)
1334 {
1335         struct ehea_port *port = netdev_priv(dev);
1336         struct ehea_port_res *pr;
1337         int i;
1338
1339         /* send */
1340
1341         for (i = 0; i < port->num_def_qps; i++) {
1342                 pr = &port->port_res[i];
1343                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1344                 netif_info(port, intr, dev,
1345                            "free send irq for res %d with handle 0x%X\n",
1346                            i, pr->eq->attr.ist1);
1347         }
1348
1349         /* associated events */
1350         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1351         netif_info(port, intr, dev,
1352                    "associated event interrupt for handle 0x%X freed\n",
1353                    port->qp_eq->attr.ist1);
1354 }
1355
1356 static int ehea_configure_port(struct ehea_port *port)
1357 {
1358         int ret, i;
1359         u64 hret, mask;
1360         struct hcp_ehea_port_cb0 *cb0;
1361
1362         ret = -ENOMEM;
1363         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1364         if (!cb0)
1365                 goto out;
1366
1367         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1368                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1369                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1370                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1372                                       PXLY_RC_VLAN_FILTER)
1373                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1374
1375         for (i = 0; i < port->num_mcs; i++)
1376                 if (use_mcs)
1377                         cb0->default_qpn_arr[i] =
1378                                 port->port_res[i].qp->init_attr.qp_nr;
1379                 else
1380                         cb0->default_qpn_arr[i] =
1381                                 port->port_res[0].qp->init_attr.qp_nr;
1382
1383         if (netif_msg_ifup(port))
1384                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1385
1386         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1387              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1388
1389         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1390                                        port->logical_port_id,
1391                                        H_PORT_CB0, mask, cb0);
1392         ret = -EIO;
1393         if (hret != H_SUCCESS)
1394                 goto out_free;
1395
1396         ret = 0;
1397
1398 out_free:
1399         free_page((unsigned long)cb0);
1400 out:
1401         return ret;
1402 }
1403
1404 static int ehea_gen_smrs(struct ehea_port_res *pr)
1405 {
1406         int ret;
1407         struct ehea_adapter *adapter = pr->port->adapter;
1408
1409         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1410         if (ret)
1411                 goto out;
1412
1413         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1414         if (ret)
1415                 goto out_free;
1416
1417         return 0;
1418
1419 out_free:
1420         ehea_rem_mr(&pr->send_mr);
1421 out:
1422         pr_err("Generating SMRS failed\n");
1423         return -EIO;
1424 }
1425
1426 static int ehea_rem_smrs(struct ehea_port_res *pr)
1427 {
1428         if ((ehea_rem_mr(&pr->send_mr)) ||
1429             (ehea_rem_mr(&pr->recv_mr)))
1430                 return -EIO;
1431         else
1432                 return 0;
1433 }
1434
1435 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1436 {
1437         int arr_size = sizeof(void *) * max_q_entries;
1438
1439         q_skba->arr = vzalloc(arr_size);
1440         if (!q_skba->arr)
1441                 return -ENOMEM;
1442
1443         q_skba->len = max_q_entries;
1444         q_skba->index = 0;
1445         q_skba->os_skbs = 0;
1446
1447         return 0;
1448 }
1449
1450 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1451                               struct port_res_cfg *pr_cfg, int queue_token)
1452 {
1453         struct ehea_adapter *adapter = port->adapter;
1454         enum ehea_eq_type eq_type = EHEA_EQ;
1455         struct ehea_qp_init_attr *init_attr = NULL;
1456         int ret = -EIO;
1457         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1458
1459         tx_bytes = pr->tx_bytes;
1460         tx_packets = pr->tx_packets;
1461         rx_bytes = pr->rx_bytes;
1462         rx_packets = pr->rx_packets;
1463
1464         memset(pr, 0, sizeof(struct ehea_port_res));
1465
1466         pr->tx_bytes = rx_bytes;
1467         pr->tx_packets = tx_packets;
1468         pr->rx_bytes = rx_bytes;
1469         pr->rx_packets = rx_packets;
1470
1471         pr->port = port;
1472
1473         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1474         if (!pr->eq) {
1475                 pr_err("create_eq failed (eq)\n");
1476                 goto out_free;
1477         }
1478
1479         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1480                                      pr->eq->fw_handle,
1481                                      port->logical_port_id);
1482         if (!pr->recv_cq) {
1483                 pr_err("create_cq failed (cq_recv)\n");
1484                 goto out_free;
1485         }
1486
1487         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1488                                      pr->eq->fw_handle,
1489                                      port->logical_port_id);
1490         if (!pr->send_cq) {
1491                 pr_err("create_cq failed (cq_send)\n");
1492                 goto out_free;
1493         }
1494
1495         if (netif_msg_ifup(port))
1496                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1497                         pr->send_cq->attr.act_nr_of_cqes,
1498                         pr->recv_cq->attr.act_nr_of_cqes);
1499
1500         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1501         if (!init_attr) {
1502                 ret = -ENOMEM;
1503                 pr_err("no mem for ehea_qp_init_attr\n");
1504                 goto out_free;
1505         }
1506
1507         init_attr->low_lat_rq1 = 1;
1508         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1509         init_attr->rq_count = 3;
1510         init_attr->qp_token = queue_token;
1511         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1512         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1513         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1514         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1515         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1516         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1517         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1518         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1519         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1520         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1521         init_attr->port_nr = port->logical_port_id;
1522         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1523         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1524         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1525
1526         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1527         if (!pr->qp) {
1528                 pr_err("create_qp failed\n");
1529                 ret = -EIO;
1530                 goto out_free;
1531         }
1532
1533         if (netif_msg_ifup(port))
1534                 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",
1535                         init_attr->qp_nr,
1536                         init_attr->act_nr_send_wqes,
1537                         init_attr->act_nr_rwqes_rq1,
1538                         init_attr->act_nr_rwqes_rq2,
1539                         init_attr->act_nr_rwqes_rq3);
1540
1541         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1542
1543         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1544         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1545         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1546         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1547         if (ret)
1548                 goto out_free;
1549
1550         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1551         if (ehea_gen_smrs(pr) != 0) {
1552                 ret = -EIO;
1553                 goto out_free;
1554         }
1555
1556         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1557
1558         kfree(init_attr);
1559
1560         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1561
1562         ret = 0;
1563         goto out;
1564
1565 out_free:
1566         kfree(init_attr);
1567         vfree(pr->sq_skba.arr);
1568         vfree(pr->rq1_skba.arr);
1569         vfree(pr->rq2_skba.arr);
1570         vfree(pr->rq3_skba.arr);
1571         ehea_destroy_qp(pr->qp);
1572         ehea_destroy_cq(pr->send_cq);
1573         ehea_destroy_cq(pr->recv_cq);
1574         ehea_destroy_eq(pr->eq);
1575 out:
1576         return ret;
1577 }
1578
1579 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1580 {
1581         int ret, i;
1582
1583         if (pr->qp)
1584                 netif_napi_del(&pr->napi);
1585
1586         ret = ehea_destroy_qp(pr->qp);
1587
1588         if (!ret) {
1589                 ehea_destroy_cq(pr->send_cq);
1590                 ehea_destroy_cq(pr->recv_cq);
1591                 ehea_destroy_eq(pr->eq);
1592
1593                 for (i = 0; i < pr->rq1_skba.len; i++)
1594                         if (pr->rq1_skba.arr[i])
1595                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1596
1597                 for (i = 0; i < pr->rq2_skba.len; i++)
1598                         if (pr->rq2_skba.arr[i])
1599                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1600
1601                 for (i = 0; i < pr->rq3_skba.len; i++)
1602                         if (pr->rq3_skba.arr[i])
1603                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1604
1605                 for (i = 0; i < pr->sq_skba.len; i++)
1606                         if (pr->sq_skba.arr[i])
1607                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1608
1609                 vfree(pr->rq1_skba.arr);
1610                 vfree(pr->rq2_skba.arr);
1611                 vfree(pr->rq3_skba.arr);
1612                 vfree(pr->sq_skba.arr);
1613                 ret = ehea_rem_smrs(pr);
1614         }
1615         return ret;
1616 }
1617
1618 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1619                                   u32 lkey)
1620 {
1621         int skb_data_size = skb_headlen(skb);
1622         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1623         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1624         unsigned int immediate_len = SWQE2_MAX_IMM;
1625
1626         swqe->descriptors = 0;
1627
1628         if (skb_is_gso(skb)) {
1629                 swqe->tx_control |= EHEA_SWQE_TSO;
1630                 swqe->mss = skb_shinfo(skb)->gso_size;
1631                 /*
1632                  * For TSO packets we only copy the headers into the
1633                  * immediate area.
1634                  */
1635                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1636         }
1637
1638         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1639                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1640                 swqe->immediate_data_length = immediate_len;
1641
1642                 if (skb_data_size > immediate_len) {
1643                         sg1entry->l_key = lkey;
1644                         sg1entry->len = skb_data_size - immediate_len;
1645                         sg1entry->vaddr =
1646                                 ehea_map_vaddr(skb->data + immediate_len);
1647                         swqe->descriptors++;
1648                 }
1649         } else {
1650                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1651                 swqe->immediate_data_length = skb_data_size;
1652         }
1653 }
1654
1655 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1656                                     struct ehea_swqe *swqe, u32 lkey)
1657 {
1658         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1659         skb_frag_t *frag;
1660         int nfrags, sg1entry_contains_frag_data, i;
1661
1662         nfrags = skb_shinfo(skb)->nr_frags;
1663         sg1entry = &swqe->u.immdata_desc.sg_entry;
1664         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1665         sg1entry_contains_frag_data = 0;
1666
1667         write_swqe2_immediate(skb, swqe, lkey);
1668
1669         /* write descriptors */
1670         if (nfrags > 0) {
1671                 if (swqe->descriptors == 0) {
1672                         /* sg1entry not yet used */
1673                         frag = &skb_shinfo(skb)->frags[0];
1674
1675                         /* copy sg1entry data */
1676                         sg1entry->l_key = lkey;
1677                         sg1entry->len = skb_frag_size(frag);
1678                         sg1entry->vaddr =
1679                                 ehea_map_vaddr(skb_frag_address(frag));
1680                         swqe->descriptors++;
1681                         sg1entry_contains_frag_data = 1;
1682                 }
1683
1684                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1685
1686                         frag = &skb_shinfo(skb)->frags[i];
1687                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1688
1689                         sgentry->l_key = lkey;
1690                         sgentry->len = skb_frag_size(frag);
1691                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1692                         swqe->descriptors++;
1693                 }
1694         }
1695 }
1696
1697 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1698 {
1699         int ret = 0;
1700         u64 hret;
1701         u8 reg_type;
1702
1703         /* De/Register untagged packets */
1704         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1705         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1706                                      port->logical_port_id,
1707                                      reg_type, port->mac_addr, 0, hcallid);
1708         if (hret != H_SUCCESS) {
1709                 pr_err("%sregistering bc address failed (tagged)\n",
1710                        hcallid == H_REG_BCMC ? "" : "de");
1711                 ret = -EIO;
1712                 goto out_herr;
1713         }
1714
1715         /* De/Register VLAN packets */
1716         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1717         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1718                                      port->logical_port_id,
1719                                      reg_type, port->mac_addr, 0, hcallid);
1720         if (hret != H_SUCCESS) {
1721                 pr_err("%sregistering bc address failed (vlan)\n",
1722                        hcallid == H_REG_BCMC ? "" : "de");
1723                 ret = -EIO;
1724         }
1725 out_herr:
1726         return ret;
1727 }
1728
1729 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1730 {
1731         struct ehea_port *port = netdev_priv(dev);
1732         struct sockaddr *mac_addr = sa;
1733         struct hcp_ehea_port_cb0 *cb0;
1734         int ret;
1735         u64 hret;
1736
1737         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1738                 ret = -EADDRNOTAVAIL;
1739                 goto out;
1740         }
1741
1742         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1743         if (!cb0) {
1744                 pr_err("no mem for cb0\n");
1745                 ret = -ENOMEM;
1746                 goto out;
1747         }
1748
1749         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1750
1751         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1752
1753         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1754                                        port->logical_port_id, H_PORT_CB0,
1755                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1756         if (hret != H_SUCCESS) {
1757                 ret = -EIO;
1758                 goto out_free;
1759         }
1760
1761         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1762
1763         /* Deregister old MAC in pHYP */
1764         if (port->state == EHEA_PORT_UP) {
1765                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1766                 if (ret)
1767                         goto out_upregs;
1768         }
1769
1770         port->mac_addr = cb0->port_mac_addr << 16;
1771
1772         /* Register new MAC in pHYP */
1773         if (port->state == EHEA_PORT_UP) {
1774                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1775                 if (ret)
1776                         goto out_upregs;
1777         }
1778
1779         ret = 0;
1780
1781 out_upregs:
1782         ehea_update_bcmc_registrations();
1783 out_free:
1784         free_page((unsigned long)cb0);
1785 out:
1786         return ret;
1787 }
1788
1789 static void ehea_promiscuous_error(u64 hret, int enable)
1790 {
1791         if (hret == H_AUTHORITY)
1792                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1793                         enable == 1 ? "en" : "dis");
1794         else
1795                 pr_err("failed %sabling promiscuous mode\n",
1796                        enable == 1 ? "en" : "dis");
1797 }
1798
1799 static void ehea_promiscuous(struct net_device *dev, int enable)
1800 {
1801         struct ehea_port *port = netdev_priv(dev);
1802         struct hcp_ehea_port_cb7 *cb7;
1803         u64 hret;
1804
1805         if (enable == port->promisc)
1806                 return;
1807
1808         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1809         if (!cb7) {
1810                 pr_err("no mem for cb7\n");
1811                 goto out;
1812         }
1813
1814         /* Modify Pxs_DUCQPN in CB7 */
1815         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1816
1817         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1818                                        port->logical_port_id,
1819                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1820         if (hret) {
1821                 ehea_promiscuous_error(hret, enable);
1822                 goto out;
1823         }
1824
1825         port->promisc = enable;
1826 out:
1827         free_page((unsigned long)cb7);
1828 }
1829
1830 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1831                                      u32 hcallid)
1832 {
1833         u64 hret;
1834         u8 reg_type;
1835
1836         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1837         if (mc_mac_addr == 0)
1838                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1839
1840         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1841                                      port->logical_port_id,
1842                                      reg_type, mc_mac_addr, 0, hcallid);
1843         if (hret)
1844                 goto out;
1845
1846         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1847         if (mc_mac_addr == 0)
1848                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1849
1850         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1851                                      port->logical_port_id,
1852                                      reg_type, mc_mac_addr, 0, hcallid);
1853 out:
1854         return hret;
1855 }
1856
1857 static int ehea_drop_multicast_list(struct net_device *dev)
1858 {
1859         struct ehea_port *port = netdev_priv(dev);
1860         struct ehea_mc_list *mc_entry = port->mc_list;
1861         struct list_head *pos;
1862         struct list_head *temp;
1863         int ret = 0;
1864         u64 hret;
1865
1866         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1867                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1868
1869                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1870                                                  H_DEREG_BCMC);
1871                 if (hret) {
1872                         pr_err("failed deregistering mcast MAC\n");
1873                         ret = -EIO;
1874                 }
1875
1876                 list_del(pos);
1877                 kfree(mc_entry);
1878         }
1879         return ret;
1880 }
1881
1882 static void ehea_allmulti(struct net_device *dev, int enable)
1883 {
1884         struct ehea_port *port = netdev_priv(dev);
1885         u64 hret;
1886
1887         if (!port->allmulti) {
1888                 if (enable) {
1889                         /* Enable ALLMULTI */
1890                         ehea_drop_multicast_list(dev);
1891                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1892                         if (!hret)
1893                                 port->allmulti = 1;
1894                         else
1895                                 netdev_err(dev,
1896                                            "failed enabling IFF_ALLMULTI\n");
1897                 }
1898         } else {
1899                 if (!enable) {
1900                         /* Disable ALLMULTI */
1901                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1902                         if (!hret)
1903                                 port->allmulti = 0;
1904                         else
1905                                 netdev_err(dev,
1906                                            "failed disabling IFF_ALLMULTI\n");
1907                 }
1908         }
1909 }
1910
1911 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1912 {
1913         struct ehea_mc_list *ehea_mcl_entry;
1914         u64 hret;
1915
1916         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1917         if (!ehea_mcl_entry)
1918                 return;
1919
1920         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1921
1922         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1923
1924         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1925                                          H_REG_BCMC);
1926         if (!hret)
1927                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1928         else {
1929                 pr_err("failed registering mcast MAC\n");
1930                 kfree(ehea_mcl_entry);
1931         }
1932 }
1933
1934 static void ehea_set_multicast_list(struct net_device *dev)
1935 {
1936         struct ehea_port *port = netdev_priv(dev);
1937         struct netdev_hw_addr *ha;
1938         int ret;
1939
1940         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1941
1942         if (dev->flags & IFF_ALLMULTI) {
1943                 ehea_allmulti(dev, 1);
1944                 goto out;
1945         }
1946         ehea_allmulti(dev, 0);
1947
1948         if (!netdev_mc_empty(dev)) {
1949                 ret = ehea_drop_multicast_list(dev);
1950                 if (ret) {
1951                         /* Dropping the current multicast list failed.
1952                          * Enabling ALL_MULTI is the best we can do.
1953                          */
1954                         ehea_allmulti(dev, 1);
1955                 }
1956
1957                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1958                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1959                                 port->adapter->max_mc_mac);
1960                         goto out;
1961                 }
1962
1963                 netdev_for_each_mc_addr(ha, dev)
1964                         ehea_add_multicast_entry(port, ha->addr);
1965
1966         }
1967 out:
1968         ehea_update_bcmc_registrations();
1969 }
1970
1971 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1972 {
1973         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1974
1975         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1976                 return;
1977
1978         if (skb->ip_summed == CHECKSUM_PARTIAL)
1979                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1980
1981         swqe->ip_start = skb_network_offset(skb);
1982         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1983
1984         switch (ip_hdr(skb)->protocol) {
1985         case IPPROTO_UDP:
1986                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1987                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1988
1989                 swqe->tcp_offset = swqe->ip_end + 1 +
1990                                    offsetof(struct udphdr, check);
1991                 break;
1992
1993         case IPPROTO_TCP:
1994                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1995                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1996
1997                 swqe->tcp_offset = swqe->ip_end + 1 +
1998                                    offsetof(struct tcphdr, check);
1999                 break;
2000         }
2001 }
2002
2003 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2004                        struct ehea_swqe *swqe, u32 lkey)
2005 {
2006         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2007
2008         xmit_common(skb, swqe);
2009
2010         write_swqe2_data(skb, dev, swqe, lkey);
2011 }
2012
2013 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2014                        struct ehea_swqe *swqe)
2015 {
2016         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2017
2018         xmit_common(skb, swqe);
2019
2020         if (!skb->data_len)
2021                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2022         else
2023                 skb_copy_bits(skb, 0, imm_data, skb->len);
2024
2025         swqe->immediate_data_length = skb->len;
2026         dev_consume_skb_any(skb);
2027 }
2028
2029 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2030 {
2031         struct ehea_port *port = netdev_priv(dev);
2032         struct ehea_swqe *swqe;
2033         u32 lkey;
2034         int swqe_index;
2035         struct ehea_port_res *pr;
2036         struct netdev_queue *txq;
2037
2038         pr = &port->port_res[skb_get_queue_mapping(skb)];
2039         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2040
2041         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2042         memset(swqe, 0, SWQE_HEADER_SIZE);
2043         atomic_dec(&pr->swqe_avail);
2044
2045         if (skb_vlan_tag_present(skb)) {
2046                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2047                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2048         }
2049
2050         pr->tx_packets++;
2051         pr->tx_bytes += skb->len;
2052
2053         if (skb->len <= SWQE3_MAX_IMM) {
2054                 u32 sig_iv = port->sig_comp_iv;
2055                 u32 swqe_num = pr->swqe_id_counter;
2056                 ehea_xmit3(skb, dev, swqe);
2057                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2058                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2059                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2060                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2061                                                       sig_iv);
2062                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2063                         pr->swqe_ll_count = 0;
2064                 } else
2065                         pr->swqe_ll_count += 1;
2066         } else {
2067                 swqe->wr_id =
2068                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2069                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2070                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2071                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2072                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2073
2074                 pr->sq_skba.index++;
2075                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2076
2077                 lkey = pr->send_mr.lkey;
2078                 ehea_xmit2(skb, dev, swqe, lkey);
2079                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2080         }
2081         pr->swqe_id_counter += 1;
2082
2083         netif_info(port, tx_queued, dev,
2084                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2085         if (netif_msg_tx_queued(port))
2086                 ehea_dump(swqe, 512, "swqe");
2087
2088         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2089                 netif_tx_stop_queue(txq);
2090                 swqe->tx_control |= EHEA_SWQE_PURGE;
2091         }
2092
2093         ehea_post_swqe(pr->qp, swqe);
2094
2095         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2096                 pr->p_stats.queue_stopped++;
2097                 netif_tx_stop_queue(txq);
2098         }
2099
2100         return NETDEV_TX_OK;
2101 }
2102
2103 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2104 {
2105         struct ehea_port *port = netdev_priv(dev);
2106         struct ehea_adapter *adapter = port->adapter;
2107         struct hcp_ehea_port_cb1 *cb1;
2108         int index;
2109         u64 hret;
2110         int err = 0;
2111
2112         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2113         if (!cb1) {
2114                 pr_err("no mem for cb1\n");
2115                 err = -ENOMEM;
2116                 goto out;
2117         }
2118
2119         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2120                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2121         if (hret != H_SUCCESS) {
2122                 pr_err("query_ehea_port failed\n");
2123                 err = -EINVAL;
2124                 goto out;
2125         }
2126
2127         index = (vid / 64);
2128         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2129
2130         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2131                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2132         if (hret != H_SUCCESS) {
2133                 pr_err("modify_ehea_port failed\n");
2134                 err = -EINVAL;
2135         }
2136 out:
2137         free_page((unsigned long)cb1);
2138         return err;
2139 }
2140
2141 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2142 {
2143         struct ehea_port *port = netdev_priv(dev);
2144         struct ehea_adapter *adapter = port->adapter;
2145         struct hcp_ehea_port_cb1 *cb1;
2146         int index;
2147         u64 hret;
2148         int err = 0;
2149
2150         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2151         if (!cb1) {
2152                 pr_err("no mem for cb1\n");
2153                 err = -ENOMEM;
2154                 goto out;
2155         }
2156
2157         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2158                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2159         if (hret != H_SUCCESS) {
2160                 pr_err("query_ehea_port failed\n");
2161                 err = -EINVAL;
2162                 goto out;
2163         }
2164
2165         index = (vid / 64);
2166         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2167
2168         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2169                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2170         if (hret != H_SUCCESS) {
2171                 pr_err("modify_ehea_port failed\n");
2172                 err = -EINVAL;
2173         }
2174 out:
2175         free_page((unsigned long)cb1);
2176         return err;
2177 }
2178
2179 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2180 {
2181         int ret = -EIO;
2182         u64 hret;
2183         u16 dummy16 = 0;
2184         u64 dummy64 = 0;
2185         struct hcp_modify_qp_cb0 *cb0;
2186
2187         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2188         if (!cb0) {
2189                 ret = -ENOMEM;
2190                 goto out;
2191         }
2192
2193         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2194                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2195         if (hret != H_SUCCESS) {
2196                 pr_err("query_ehea_qp failed (1)\n");
2197                 goto out;
2198         }
2199
2200         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2201         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2202                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2203                                      &dummy64, &dummy64, &dummy16, &dummy16);
2204         if (hret != H_SUCCESS) {
2205                 pr_err("modify_ehea_qp failed (1)\n");
2206                 goto out;
2207         }
2208
2209         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2210                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2211         if (hret != H_SUCCESS) {
2212                 pr_err("query_ehea_qp failed (2)\n");
2213                 goto out;
2214         }
2215
2216         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2217         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2218                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2219                                      &dummy64, &dummy64, &dummy16, &dummy16);
2220         if (hret != H_SUCCESS) {
2221                 pr_err("modify_ehea_qp failed (2)\n");
2222                 goto out;
2223         }
2224
2225         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2226                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2227         if (hret != H_SUCCESS) {
2228                 pr_err("query_ehea_qp failed (3)\n");
2229                 goto out;
2230         }
2231
2232         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2233         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2234                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2235                                      &dummy64, &dummy64, &dummy16, &dummy16);
2236         if (hret != H_SUCCESS) {
2237                 pr_err("modify_ehea_qp failed (3)\n");
2238                 goto out;
2239         }
2240
2241         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2242                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2243         if (hret != H_SUCCESS) {
2244                 pr_err("query_ehea_qp failed (4)\n");
2245                 goto out;
2246         }
2247
2248         ret = 0;
2249 out:
2250         free_page((unsigned long)cb0);
2251         return ret;
2252 }
2253
2254 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2255 {
2256         int ret, i;
2257         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2258         enum ehea_eq_type eq_type = EHEA_EQ;
2259
2260         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2261                                    EHEA_MAX_ENTRIES_EQ, 1);
2262         if (!port->qp_eq) {
2263                 ret = -EINVAL;
2264                 pr_err("ehea_create_eq failed (qp_eq)\n");
2265                 goto out_kill_eq;
2266         }
2267
2268         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2269         pr_cfg.max_entries_scq = sq_entries * 2;
2270         pr_cfg.max_entries_sq = sq_entries;
2271         pr_cfg.max_entries_rq1 = rq1_entries;
2272         pr_cfg.max_entries_rq2 = rq2_entries;
2273         pr_cfg.max_entries_rq3 = rq3_entries;
2274
2275         pr_cfg_small_rx.max_entries_rcq = 1;
2276         pr_cfg_small_rx.max_entries_scq = sq_entries;
2277         pr_cfg_small_rx.max_entries_sq = sq_entries;
2278         pr_cfg_small_rx.max_entries_rq1 = 1;
2279         pr_cfg_small_rx.max_entries_rq2 = 1;
2280         pr_cfg_small_rx.max_entries_rq3 = 1;
2281
2282         for (i = 0; i < def_qps; i++) {
2283                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2284                 if (ret)
2285                         goto out_clean_pr;
2286         }
2287         for (i = def_qps; i < def_qps; i++) {
2288                 ret = ehea_init_port_res(port, &port->port_res[i],
2289                                          &pr_cfg_small_rx, i);
2290                 if (ret)
2291                         goto out_clean_pr;
2292         }
2293
2294         return 0;
2295
2296 out_clean_pr:
2297         while (--i >= 0)
2298                 ehea_clean_portres(port, &port->port_res[i]);
2299
2300 out_kill_eq:
2301         ehea_destroy_eq(port->qp_eq);
2302         return ret;
2303 }
2304
2305 static int ehea_clean_all_portres(struct ehea_port *port)
2306 {
2307         int ret = 0;
2308         int i;
2309
2310         for (i = 0; i < port->num_def_qps; i++)
2311                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2312
2313         ret |= ehea_destroy_eq(port->qp_eq);
2314
2315         return ret;
2316 }
2317
2318 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2319 {
2320         if (adapter->active_ports)
2321                 return;
2322
2323         ehea_rem_mr(&adapter->mr);
2324 }
2325
2326 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2327 {
2328         if (adapter->active_ports)
2329                 return 0;
2330
2331         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2332 }
2333
2334 static int ehea_up(struct net_device *dev)
2335 {
2336         int ret, i;
2337         struct ehea_port *port = netdev_priv(dev);
2338
2339         if (port->state == EHEA_PORT_UP)
2340                 return 0;
2341
2342         ret = ehea_port_res_setup(port, port->num_def_qps);
2343         if (ret) {
2344                 netdev_err(dev, "port_res_failed\n");
2345                 goto out;
2346         }
2347
2348         /* Set default QP for this port */
2349         ret = ehea_configure_port(port);
2350         if (ret) {
2351                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2352                 goto out_clean_pr;
2353         }
2354
2355         ret = ehea_reg_interrupts(dev);
2356         if (ret) {
2357                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2358                 goto out_clean_pr;
2359         }
2360
2361         for (i = 0; i < port->num_def_qps; i++) {
2362                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2363                 if (ret) {
2364                         netdev_err(dev, "activate_qp failed\n");
2365                         goto out_free_irqs;
2366                 }
2367         }
2368
2369         for (i = 0; i < port->num_def_qps; i++) {
2370                 ret = ehea_fill_port_res(&port->port_res[i]);
2371                 if (ret) {
2372                         netdev_err(dev, "out_free_irqs\n");
2373                         goto out_free_irqs;
2374                 }
2375         }
2376
2377         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2378         if (ret) {
2379                 ret = -EIO;
2380                 goto out_free_irqs;
2381         }
2382
2383         port->state = EHEA_PORT_UP;
2384
2385         ret = 0;
2386         goto out;
2387
2388 out_free_irqs:
2389         ehea_free_interrupts(dev);
2390
2391 out_clean_pr:
2392         ehea_clean_all_portres(port);
2393 out:
2394         if (ret)
2395                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2396
2397         ehea_update_bcmc_registrations();
2398         ehea_update_firmware_handles();
2399
2400         return ret;
2401 }
2402
2403 static void port_napi_disable(struct ehea_port *port)
2404 {
2405         int i;
2406
2407         for (i = 0; i < port->num_def_qps; i++)
2408                 napi_disable(&port->port_res[i].napi);
2409 }
2410
2411 static void port_napi_enable(struct ehea_port *port)
2412 {
2413         int i;
2414
2415         for (i = 0; i < port->num_def_qps; i++)
2416                 napi_enable(&port->port_res[i].napi);
2417 }
2418
2419 static int ehea_open(struct net_device *dev)
2420 {
2421         int ret;
2422         struct ehea_port *port = netdev_priv(dev);
2423
2424         mutex_lock(&port->port_lock);
2425
2426         netif_info(port, ifup, dev, "enabling port\n");
2427
2428         netif_carrier_off(dev);
2429
2430         ret = ehea_up(dev);
2431         if (!ret) {
2432                 port_napi_enable(port);
2433                 netif_tx_start_all_queues(dev);
2434         }
2435
2436         mutex_unlock(&port->port_lock);
2437         schedule_delayed_work(&port->stats_work,
2438                               round_jiffies_relative(msecs_to_jiffies(1000)));
2439
2440         return ret;
2441 }
2442
2443 static int ehea_down(struct net_device *dev)
2444 {
2445         int ret;
2446         struct ehea_port *port = netdev_priv(dev);
2447
2448         if (port->state == EHEA_PORT_DOWN)
2449                 return 0;
2450
2451         ehea_drop_multicast_list(dev);
2452         ehea_allmulti(dev, 0);
2453         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2454
2455         ehea_free_interrupts(dev);
2456
2457         port->state = EHEA_PORT_DOWN;
2458
2459         ehea_update_bcmc_registrations();
2460
2461         ret = ehea_clean_all_portres(port);
2462         if (ret)
2463                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2464
2465         ehea_update_firmware_handles();
2466
2467         return ret;
2468 }
2469
2470 static int ehea_stop(struct net_device *dev)
2471 {
2472         int ret;
2473         struct ehea_port *port = netdev_priv(dev);
2474
2475         netif_info(port, ifdown, dev, "disabling port\n");
2476
2477         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2478         cancel_work_sync(&port->reset_task);
2479         cancel_delayed_work_sync(&port->stats_work);
2480         mutex_lock(&port->port_lock);
2481         netif_tx_stop_all_queues(dev);
2482         port_napi_disable(port);
2483         ret = ehea_down(dev);
2484         mutex_unlock(&port->port_lock);
2485         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2486         return ret;
2487 }
2488
2489 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2490 {
2491         struct ehea_qp qp = *orig_qp;
2492         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2493         struct ehea_swqe *swqe;
2494         int wqe_index;
2495         int i;
2496
2497         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2498                 swqe = ehea_get_swqe(&qp, &wqe_index);
2499                 swqe->tx_control |= EHEA_SWQE_PURGE;
2500         }
2501 }
2502
2503 static void ehea_flush_sq(struct ehea_port *port)
2504 {
2505         int i;
2506
2507         for (i = 0; i < port->num_def_qps; i++) {
2508                 struct ehea_port_res *pr = &port->port_res[i];
2509                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2510                 int ret;
2511
2512                 ret = wait_event_timeout(port->swqe_avail_wq,
2513                          atomic_read(&pr->swqe_avail) >= swqe_max,
2514                          msecs_to_jiffies(100));
2515
2516                 if (!ret) {
2517                         pr_err("WARNING: sq not flushed completely\n");
2518                         break;
2519                 }
2520         }
2521 }
2522
2523 static int ehea_stop_qps(struct net_device *dev)
2524 {
2525         struct ehea_port *port = netdev_priv(dev);
2526         struct ehea_adapter *adapter = port->adapter;
2527         struct hcp_modify_qp_cb0 *cb0;
2528         int ret = -EIO;
2529         int dret;
2530         int i;
2531         u64 hret;
2532         u64 dummy64 = 0;
2533         u16 dummy16 = 0;
2534
2535         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2536         if (!cb0) {
2537                 ret = -ENOMEM;
2538                 goto out;
2539         }
2540
2541         for (i = 0; i < (port->num_def_qps); i++) {
2542                 struct ehea_port_res *pr =  &port->port_res[i];
2543                 struct ehea_qp *qp = pr->qp;
2544
2545                 /* Purge send queue */
2546                 ehea_purge_sq(qp);
2547
2548                 /* Disable queue pair */
2549                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2550                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2551                                             cb0);
2552                 if (hret != H_SUCCESS) {
2553                         pr_err("query_ehea_qp failed (1)\n");
2554                         goto out;
2555                 }
2556
2557                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2558                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2559
2560                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2561                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2562                                                             1), cb0, &dummy64,
2563                                              &dummy64, &dummy16, &dummy16);
2564                 if (hret != H_SUCCESS) {
2565                         pr_err("modify_ehea_qp failed (1)\n");
2566                         goto out;
2567                 }
2568
2569                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2570                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2571                                             cb0);
2572                 if (hret != H_SUCCESS) {
2573                         pr_err("query_ehea_qp failed (2)\n");
2574                         goto out;
2575                 }
2576
2577                 /* deregister shared memory regions */
2578                 dret = ehea_rem_smrs(pr);
2579                 if (dret) {
2580                         pr_err("unreg shared memory region failed\n");
2581                         goto out;
2582                 }
2583         }
2584
2585         ret = 0;
2586 out:
2587         free_page((unsigned long)cb0);
2588
2589         return ret;
2590 }
2591
2592 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2593 {
2594         struct ehea_qp qp = *orig_qp;
2595         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2596         struct ehea_rwqe *rwqe;
2597         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2598         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2599         struct sk_buff *skb;
2600         u32 lkey = pr->recv_mr.lkey;
2601
2602
2603         int i;
2604         int index;
2605
2606         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2607                 rwqe = ehea_get_next_rwqe(&qp, 2);
2608                 rwqe->sg_list[0].l_key = lkey;
2609                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2610                 skb = skba_rq2[index];
2611                 if (skb)
2612                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2613         }
2614
2615         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2616                 rwqe = ehea_get_next_rwqe(&qp, 3);
2617                 rwqe->sg_list[0].l_key = lkey;
2618                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2619                 skb = skba_rq3[index];
2620                 if (skb)
2621                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2622         }
2623 }
2624
2625 static int ehea_restart_qps(struct net_device *dev)
2626 {
2627         struct ehea_port *port = netdev_priv(dev);
2628         struct ehea_adapter *adapter = port->adapter;
2629         int ret = 0;
2630         int i;
2631
2632         struct hcp_modify_qp_cb0 *cb0;
2633         u64 hret;
2634         u64 dummy64 = 0;
2635         u16 dummy16 = 0;
2636
2637         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2638         if (!cb0) {
2639                 ret = -ENOMEM;
2640                 goto out;
2641         }
2642
2643         for (i = 0; i < (port->num_def_qps); i++) {
2644                 struct ehea_port_res *pr =  &port->port_res[i];
2645                 struct ehea_qp *qp = pr->qp;
2646
2647                 ret = ehea_gen_smrs(pr);
2648                 if (ret) {
2649                         netdev_err(dev, "creation of shared memory regions failed\n");
2650                         goto out;
2651                 }
2652
2653                 ehea_update_rqs(qp, pr);
2654
2655                 /* Enable queue pair */
2656                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2657                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2658                                             cb0);
2659                 if (hret != H_SUCCESS) {
2660                         netdev_err(dev, "query_ehea_qp failed (1)\n");
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                         goto out;
2674                 }
2675
2676                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2677                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2678                                             cb0);
2679                 if (hret != H_SUCCESS) {
2680                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2681                         goto out;
2682                 }
2683
2684                 /* refill entire queue */
2685                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2686                 ehea_refill_rq2(pr, 0);
2687                 ehea_refill_rq3(pr, 0);
2688         }
2689 out:
2690         free_page((unsigned long)cb0);
2691
2692         return ret;
2693 }
2694
2695 static void ehea_reset_port(struct work_struct *work)
2696 {
2697         int ret;
2698         struct ehea_port *port =
2699                 container_of(work, struct ehea_port, reset_task);
2700         struct net_device *dev = port->netdev;
2701
2702         mutex_lock(&dlpar_mem_lock);
2703         port->resets++;
2704         mutex_lock(&port->port_lock);
2705         netif_tx_disable(dev);
2706
2707         port_napi_disable(port);
2708
2709         ehea_down(dev);
2710
2711         ret = ehea_up(dev);
2712         if (ret)
2713                 goto out;
2714
2715         ehea_set_multicast_list(dev);
2716
2717         netif_info(port, timer, dev, "reset successful\n");
2718
2719         port_napi_enable(port);
2720
2721         netif_tx_wake_all_queues(dev);
2722 out:
2723         mutex_unlock(&port->port_lock);
2724         mutex_unlock(&dlpar_mem_lock);
2725 }
2726
2727 static void ehea_rereg_mrs(void)
2728 {
2729         int ret, i;
2730         struct ehea_adapter *adapter;
2731
2732         pr_info("LPAR memory changed - re-initializing driver\n");
2733
2734         list_for_each_entry(adapter, &adapter_list, list)
2735                 if (adapter->active_ports) {
2736                         /* Shutdown all ports */
2737                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2738                                 struct ehea_port *port = adapter->port[i];
2739                                 struct net_device *dev;
2740
2741                                 if (!port)
2742                                         continue;
2743
2744                                 dev = port->netdev;
2745
2746                                 if (dev->flags & IFF_UP) {
2747                                         mutex_lock(&port->port_lock);
2748                                         netif_tx_disable(dev);
2749                                         ehea_flush_sq(port);
2750                                         ret = ehea_stop_qps(dev);
2751                                         if (ret) {
2752                                                 mutex_unlock(&port->port_lock);
2753                                                 goto out;
2754                                         }
2755                                         port_napi_disable(port);
2756                                         mutex_unlock(&port->port_lock);
2757                                 }
2758                                 reset_sq_restart_flag(port);
2759                         }
2760
2761                         /* Unregister old memory region */
2762                         ret = ehea_rem_mr(&adapter->mr);
2763                         if (ret) {
2764                                 pr_err("unregister MR failed - driver inoperable!\n");
2765                                 goto out;
2766                         }
2767                 }
2768
2769         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2770
2771         list_for_each_entry(adapter, &adapter_list, list)
2772                 if (adapter->active_ports) {
2773                         /* Register new memory region */
2774                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2775                         if (ret) {
2776                                 pr_err("register MR failed - driver inoperable!\n");
2777                                 goto out;
2778                         }
2779
2780                         /* Restart all ports */
2781                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2782                                 struct ehea_port *port = adapter->port[i];
2783
2784                                 if (port) {
2785                                         struct net_device *dev = port->netdev;
2786
2787                                         if (dev->flags & IFF_UP) {
2788                                                 mutex_lock(&port->port_lock);
2789                                                 ret = ehea_restart_qps(dev);
2790                                                 if (!ret) {
2791                                                         check_sqs(port);
2792                                                         port_napi_enable(port);
2793                                                         netif_tx_wake_all_queues(dev);
2794                                                 } else {
2795                                                         netdev_err(dev, "Unable to restart QPS\n");
2796                                                 }
2797                                                 mutex_unlock(&port->port_lock);
2798                                         }
2799                                 }
2800                         }
2801                 }
2802         pr_info("re-initializing driver complete\n");
2803 out:
2804         return;
2805 }
2806
2807 static void ehea_tx_watchdog(struct net_device *dev)
2808 {
2809         struct ehea_port *port = netdev_priv(dev);
2810
2811         if (netif_carrier_ok(dev) &&
2812             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2813                 ehea_schedule_port_reset(port);
2814 }
2815
2816 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2817 {
2818         struct hcp_query_ehea *cb;
2819         u64 hret;
2820         int ret;
2821
2822         cb = (void *)get_zeroed_page(GFP_KERNEL);
2823         if (!cb) {
2824                 ret = -ENOMEM;
2825                 goto out;
2826         }
2827
2828         hret = ehea_h_query_ehea(adapter->handle, cb);
2829
2830         if (hret != H_SUCCESS) {
2831                 ret = -EIO;
2832                 goto out_herr;
2833         }
2834
2835         adapter->max_mc_mac = cb->max_mc_mac - 1;
2836         ret = 0;
2837
2838 out_herr:
2839         free_page((unsigned long)cb);
2840 out:
2841         return ret;
2842 }
2843
2844 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2845 {
2846         struct hcp_ehea_port_cb4 *cb4;
2847         u64 hret;
2848         int ret = 0;
2849
2850         *jumbo = 0;
2851
2852         /* (Try to) enable *jumbo frames */
2853         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2854         if (!cb4) {
2855                 pr_err("no mem for cb4\n");
2856                 ret = -ENOMEM;
2857                 goto out;
2858         } else {
2859                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2860                                               port->logical_port_id,
2861                                               H_PORT_CB4,
2862                                               H_PORT_CB4_JUMBO, cb4);
2863                 if (hret == H_SUCCESS) {
2864                         if (cb4->jumbo_frame)
2865                                 *jumbo = 1;
2866                         else {
2867                                 cb4->jumbo_frame = 1;
2868                                 hret = ehea_h_modify_ehea_port(port->adapter->
2869                                                                handle,
2870                                                                port->
2871                                                                logical_port_id,
2872                                                                H_PORT_CB4,
2873                                                                H_PORT_CB4_JUMBO,
2874                                                                cb4);
2875                                 if (hret == H_SUCCESS)
2876                                         *jumbo = 1;
2877                         }
2878                 } else
2879                         ret = -EINVAL;
2880
2881                 free_page((unsigned long)cb4);
2882         }
2883 out:
2884         return ret;
2885 }
2886
2887 static ssize_t ehea_show_port_id(struct device *dev,
2888                                  struct device_attribute *attr, char *buf)
2889 {
2890         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2891         return sprintf(buf, "%d", port->logical_port_id);
2892 }
2893
2894 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2895
2896 static void logical_port_release(struct device *dev)
2897 {
2898         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2899         of_node_put(port->ofdev.dev.of_node);
2900 }
2901
2902 static struct device *ehea_register_port(struct ehea_port *port,
2903                                          struct device_node *dn)
2904 {
2905         int ret;
2906
2907         port->ofdev.dev.of_node = of_node_get(dn);
2908         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2909         port->ofdev.dev.bus = &ibmebus_bus_type;
2910
2911         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2912         port->ofdev.dev.release = logical_port_release;
2913
2914         ret = of_device_register(&port->ofdev);
2915         if (ret) {
2916                 pr_err("failed to register device. ret=%d\n", ret);
2917                 goto out;
2918         }
2919
2920         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2921         if (ret) {
2922                 pr_err("failed to register attributes, ret=%d\n", ret);
2923                 goto out_unreg_of_dev;
2924         }
2925
2926         return &port->ofdev.dev;
2927
2928 out_unreg_of_dev:
2929         of_device_unregister(&port->ofdev);
2930 out:
2931         return NULL;
2932 }
2933
2934 static void ehea_unregister_port(struct ehea_port *port)
2935 {
2936         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2937         of_device_unregister(&port->ofdev);
2938 }
2939
2940 static const struct net_device_ops ehea_netdev_ops = {
2941         .ndo_open               = ehea_open,
2942         .ndo_stop               = ehea_stop,
2943         .ndo_start_xmit         = ehea_start_xmit,
2944         .ndo_get_stats64        = ehea_get_stats64,
2945         .ndo_set_mac_address    = ehea_set_mac_addr,
2946         .ndo_validate_addr      = eth_validate_addr,
2947         .ndo_set_rx_mode        = ehea_set_multicast_list,
2948         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2949         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2950         .ndo_tx_timeout         = ehea_tx_watchdog,
2951 };
2952
2953 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2954                                          u32 logical_port_id,
2955                                          struct device_node *dn)
2956 {
2957         int ret;
2958         struct net_device *dev;
2959         struct ehea_port *port;
2960         struct device *port_dev;
2961         int jumbo;
2962
2963         /* allocate memory for the port structures */
2964         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2965
2966         if (!dev) {
2967                 ret = -ENOMEM;
2968                 goto out_err;
2969         }
2970
2971         port = netdev_priv(dev);
2972
2973         mutex_init(&port->port_lock);
2974         port->state = EHEA_PORT_DOWN;
2975         port->sig_comp_iv = sq_entries / 10;
2976
2977         port->adapter = adapter;
2978         port->netdev = dev;
2979         port->logical_port_id = logical_port_id;
2980
2981         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2982
2983         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2984         if (!port->mc_list) {
2985                 ret = -ENOMEM;
2986                 goto out_free_ethdev;
2987         }
2988
2989         INIT_LIST_HEAD(&port->mc_list->list);
2990
2991         ret = ehea_sense_port_attr(port);
2992         if (ret)
2993                 goto out_free_mc_list;
2994
2995         netif_set_real_num_rx_queues(dev, port->num_def_qps);
2996         netif_set_real_num_tx_queues(dev, port->num_def_qps);
2997
2998         port_dev = ehea_register_port(port, dn);
2999         if (!port_dev)
3000                 goto out_free_mc_list;
3001
3002         SET_NETDEV_DEV(dev, port_dev);
3003
3004         /* initialize net_device structure */
3005         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3006
3007         dev->netdev_ops = &ehea_netdev_ops;
3008         ehea_set_ethtool_ops(dev);
3009
3010         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3011                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3012         dev->features = NETIF_F_SG | NETIF_F_TSO |
3013                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3014                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3015                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3016         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3017                         NETIF_F_IP_CSUM;
3018         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3019
3020         /* MTU range: 68 - 9022 */
3021         dev->min_mtu = ETH_MIN_MTU;
3022         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3023
3024         INIT_WORK(&port->reset_task, ehea_reset_port);
3025         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3026
3027         init_waitqueue_head(&port->swqe_avail_wq);
3028         init_waitqueue_head(&port->restart_wq);
3029
3030         ret = register_netdev(dev);
3031         if (ret) {
3032                 pr_err("register_netdev failed. ret=%d\n", ret);
3033                 goto out_unreg_port;
3034         }
3035
3036         ret = ehea_get_jumboframe_status(port, &jumbo);
3037         if (ret)
3038                 netdev_err(dev, "failed determining jumbo frame status\n");
3039
3040         netdev_info(dev, "Jumbo frames are %sabled\n",
3041                     jumbo == 1 ? "en" : "dis");
3042
3043         adapter->active_ports++;
3044
3045         return port;
3046
3047 out_unreg_port:
3048         ehea_unregister_port(port);
3049
3050 out_free_mc_list:
3051         kfree(port->mc_list);
3052
3053 out_free_ethdev:
3054         free_netdev(dev);
3055
3056 out_err:
3057         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3058                logical_port_id, ret);
3059         return NULL;
3060 }
3061
3062 static void ehea_shutdown_single_port(struct ehea_port *port)
3063 {
3064         struct ehea_adapter *adapter = port->adapter;
3065
3066         cancel_work_sync(&port->reset_task);
3067         cancel_delayed_work_sync(&port->stats_work);
3068         unregister_netdev(port->netdev);
3069         ehea_unregister_port(port);
3070         kfree(port->mc_list);
3071         free_netdev(port->netdev);
3072         adapter->active_ports--;
3073 }
3074
3075 static int ehea_setup_ports(struct ehea_adapter *adapter)
3076 {
3077         struct device_node *lhea_dn;
3078         struct device_node *eth_dn = NULL;
3079
3080         const u32 *dn_log_port_id;
3081         int i = 0;
3082
3083         lhea_dn = adapter->ofdev->dev.of_node;
3084         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3085
3086                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3087                                                  NULL);
3088                 if (!dn_log_port_id) {
3089                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3090                         continue;
3091                 }
3092
3093                 if (ehea_add_adapter_mr(adapter)) {
3094                         pr_err("creating MR failed\n");
3095                         of_node_put(eth_dn);
3096                         return -EIO;
3097                 }
3098
3099                 adapter->port[i] = ehea_setup_single_port(adapter,
3100                                                           *dn_log_port_id,
3101                                                           eth_dn);
3102                 if (adapter->port[i])
3103                         netdev_info(adapter->port[i]->netdev,
3104                                     "logical port id #%d\n", *dn_log_port_id);
3105                 else
3106                         ehea_remove_adapter_mr(adapter);
3107
3108                 i++;
3109         }
3110         return 0;
3111 }
3112
3113 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3114                                            u32 logical_port_id)
3115 {
3116         struct device_node *lhea_dn;
3117         struct device_node *eth_dn = NULL;
3118         const u32 *dn_log_port_id;
3119
3120         lhea_dn = adapter->ofdev->dev.of_node;
3121         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3122
3123                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3124                                                  NULL);
3125                 if (dn_log_port_id)
3126                         if (*dn_log_port_id == logical_port_id)
3127                                 return eth_dn;
3128         }
3129
3130         return NULL;
3131 }
3132
3133 static ssize_t ehea_probe_port(struct device *dev,
3134                                struct device_attribute *attr,
3135                                const char *buf, size_t count)
3136 {
3137         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3138         struct ehea_port *port;
3139         struct device_node *eth_dn = NULL;
3140         int i;
3141
3142         u32 logical_port_id;
3143
3144         sscanf(buf, "%d", &logical_port_id);
3145
3146         port = ehea_get_port(adapter, logical_port_id);
3147
3148         if (port) {
3149                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3150                             logical_port_id);
3151                 return -EINVAL;
3152         }
3153
3154         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3155
3156         if (!eth_dn) {
3157                 pr_info("no logical port with id %d found\n", logical_port_id);
3158                 return -EINVAL;
3159         }
3160
3161         if (ehea_add_adapter_mr(adapter)) {
3162                 pr_err("creating MR failed\n");
3163                 of_node_put(eth_dn);
3164                 return -EIO;
3165         }
3166
3167         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3168
3169         of_node_put(eth_dn);
3170
3171         if (port) {
3172                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3173                         if (!adapter->port[i]) {
3174                                 adapter->port[i] = port;
3175                                 break;
3176                         }
3177
3178                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3179                             logical_port_id);
3180         } else {
3181                 ehea_remove_adapter_mr(adapter);
3182                 return -EIO;
3183         }
3184
3185         return (ssize_t) count;
3186 }
3187
3188 static ssize_t ehea_remove_port(struct device *dev,
3189                                 struct device_attribute *attr,
3190                                 const char *buf, size_t count)
3191 {
3192         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3193         struct ehea_port *port;
3194         int i;
3195         u32 logical_port_id;
3196
3197         sscanf(buf, "%d", &logical_port_id);
3198
3199         port = ehea_get_port(adapter, logical_port_id);
3200
3201         if (port) {
3202                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3203                             logical_port_id);
3204
3205                 ehea_shutdown_single_port(port);
3206
3207                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3208                         if (adapter->port[i] == port) {
3209                                 adapter->port[i] = NULL;
3210                                 break;
3211                         }
3212         } else {
3213                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3214                        logical_port_id);
3215                 return -EINVAL;
3216         }
3217
3218         ehea_remove_adapter_mr(adapter);
3219
3220         return (ssize_t) count;
3221 }
3222
3223 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3224 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3225
3226 static int ehea_create_device_sysfs(struct platform_device *dev)
3227 {
3228         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3229         if (ret)
3230                 goto out;
3231
3232         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3233 out:
3234         return ret;
3235 }
3236
3237 static void ehea_remove_device_sysfs(struct platform_device *dev)
3238 {
3239         device_remove_file(&dev->dev, &dev_attr_probe_port);
3240         device_remove_file(&dev->dev, &dev_attr_remove_port);
3241 }
3242
3243 static int ehea_reboot_notifier(struct notifier_block *nb,
3244                                 unsigned long action, void *unused)
3245 {
3246         if (action == SYS_RESTART) {
3247                 pr_info("Reboot: freeing all eHEA resources\n");
3248                 ibmebus_unregister_driver(&ehea_driver);
3249         }
3250         return NOTIFY_DONE;
3251 }
3252
3253 static struct notifier_block ehea_reboot_nb = {
3254         .notifier_call = ehea_reboot_notifier,
3255 };
3256
3257 static int ehea_mem_notifier(struct notifier_block *nb,
3258                              unsigned long action, void *data)
3259 {
3260         int ret = NOTIFY_BAD;
3261         struct memory_notify *arg = data;
3262
3263         mutex_lock(&dlpar_mem_lock);
3264
3265         switch (action) {
3266         case MEM_CANCEL_OFFLINE:
3267                 pr_info("memory offlining canceled");
3268                 /* Fall through: re-add canceled memory block */
3269
3270         case MEM_ONLINE:
3271                 pr_info("memory is going online");
3272                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3273                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3274                         goto out_unlock;
3275                 ehea_rereg_mrs();
3276                 break;
3277
3278         case MEM_GOING_OFFLINE:
3279                 pr_info("memory is going offline");
3280                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3281                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3282                         goto out_unlock;
3283                 ehea_rereg_mrs();
3284                 break;
3285
3286         default:
3287                 break;
3288         }
3289
3290         ehea_update_firmware_handles();
3291         ret = NOTIFY_OK;
3292
3293 out_unlock:
3294         mutex_unlock(&dlpar_mem_lock);
3295         return ret;
3296 }
3297
3298 static struct notifier_block ehea_mem_nb = {
3299         .notifier_call = ehea_mem_notifier,
3300 };
3301
3302 static void ehea_crash_handler(void)
3303 {
3304         int i;
3305
3306         if (ehea_fw_handles.arr)
3307                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3308                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3309                                              ehea_fw_handles.arr[i].fwh,
3310                                              FORCE_FREE);
3311
3312         if (ehea_bcmc_regs.arr)
3313                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3314                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3315                                               ehea_bcmc_regs.arr[i].port_id,
3316                                               ehea_bcmc_regs.arr[i].reg_type,
3317                                               ehea_bcmc_regs.arr[i].macaddr,
3318                                               0, H_DEREG_BCMC);
3319 }
3320
3321 static atomic_t ehea_memory_hooks_registered;
3322
3323 /* Register memory hooks on probe of first adapter */
3324 static int ehea_register_memory_hooks(void)
3325 {
3326         int ret = 0;
3327
3328         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3329                 return 0;
3330
3331         ret = ehea_create_busmap();
3332         if (ret) {
3333                 pr_info("ehea_create_busmap failed\n");
3334                 goto out;
3335         }
3336
3337         ret = register_reboot_notifier(&ehea_reboot_nb);
3338         if (ret) {
3339                 pr_info("register_reboot_notifier failed\n");
3340                 goto out;
3341         }
3342
3343         ret = register_memory_notifier(&ehea_mem_nb);
3344         if (ret) {
3345                 pr_info("register_memory_notifier failed\n");
3346                 goto out2;
3347         }
3348
3349         ret = crash_shutdown_register(ehea_crash_handler);
3350         if (ret) {
3351                 pr_info("crash_shutdown_register failed\n");
3352                 goto out3;
3353         }
3354
3355         return 0;
3356
3357 out3:
3358         unregister_memory_notifier(&ehea_mem_nb);
3359 out2:
3360         unregister_reboot_notifier(&ehea_reboot_nb);
3361 out:
3362         atomic_dec(&ehea_memory_hooks_registered);
3363         return ret;
3364 }
3365
3366 static void ehea_unregister_memory_hooks(void)
3367 {
3368         /* Only remove the hooks if we've registered them */
3369         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3370                 return;
3371
3372         unregister_reboot_notifier(&ehea_reboot_nb);
3373         if (crash_shutdown_unregister(ehea_crash_handler))
3374                 pr_info("failed unregistering crash handler\n");
3375         unregister_memory_notifier(&ehea_mem_nb);
3376 }
3377
3378 static int ehea_probe_adapter(struct platform_device *dev)
3379 {
3380         struct ehea_adapter *adapter;
3381         const u64 *adapter_handle;
3382         int ret;
3383         int i;
3384
3385         ret = ehea_register_memory_hooks();
3386         if (ret)
3387                 return ret;
3388
3389         if (!dev || !dev->dev.of_node) {
3390                 pr_err("Invalid ibmebus device probed\n");
3391                 return -EINVAL;
3392         }
3393
3394         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3395         if (!adapter) {
3396                 ret = -ENOMEM;
3397                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3398                 goto out;
3399         }
3400
3401         list_add(&adapter->list, &adapter_list);
3402
3403         adapter->ofdev = dev;
3404
3405         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3406                                          NULL);
3407         if (adapter_handle)
3408                 adapter->handle = *adapter_handle;
3409
3410         if (!adapter->handle) {
3411                 dev_err(&dev->dev, "failed getting handle for adapter"
3412                         " '%pOF'\n", dev->dev.of_node);
3413                 ret = -ENODEV;
3414                 goto out_free_ad;
3415         }
3416
3417         adapter->pd = EHEA_PD_ID;
3418
3419         platform_set_drvdata(dev, adapter);
3420
3421
3422         /* initialize adapter and ports */
3423         /* get adapter properties */
3424         ret = ehea_sense_adapter_attr(adapter);
3425         if (ret) {
3426                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3427                 goto out_free_ad;
3428         }
3429
3430         adapter->neq = ehea_create_eq(adapter,
3431                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3432         if (!adapter->neq) {
3433                 ret = -EIO;
3434                 dev_err(&dev->dev, "NEQ creation failed\n");
3435                 goto out_free_ad;
3436         }
3437
3438         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3439                      (unsigned long)adapter);
3440
3441         ret = ehea_create_device_sysfs(dev);
3442         if (ret)
3443                 goto out_kill_eq;
3444
3445         ret = ehea_setup_ports(adapter);
3446         if (ret) {
3447                 dev_err(&dev->dev, "setup_ports failed\n");
3448                 goto out_rem_dev_sysfs;
3449         }
3450
3451         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3452                                   ehea_interrupt_neq, 0,
3453                                   "ehea_neq", adapter);
3454         if (ret) {
3455                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3456                 goto out_shutdown_ports;
3457         }
3458
3459         /* Handle any events that might be pending. */
3460         tasklet_hi_schedule(&adapter->neq_tasklet);
3461
3462         ret = 0;
3463         goto out;
3464
3465 out_shutdown_ports:
3466         for (i = 0; i < EHEA_MAX_PORTS; i++)
3467                 if (adapter->port[i]) {
3468                         ehea_shutdown_single_port(adapter->port[i]);
3469                         adapter->port[i] = NULL;
3470                 }
3471
3472 out_rem_dev_sysfs:
3473         ehea_remove_device_sysfs(dev);
3474
3475 out_kill_eq:
3476         ehea_destroy_eq(adapter->neq);
3477
3478 out_free_ad:
3479         list_del(&adapter->list);
3480
3481 out:
3482         ehea_update_firmware_handles();
3483
3484         return ret;
3485 }
3486
3487 static int ehea_remove(struct platform_device *dev)
3488 {
3489         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3490         int i;
3491
3492         for (i = 0; i < EHEA_MAX_PORTS; i++)
3493                 if (adapter->port[i]) {
3494                         ehea_shutdown_single_port(adapter->port[i]);
3495                         adapter->port[i] = NULL;
3496                 }
3497
3498         ehea_remove_device_sysfs(dev);
3499
3500         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3501         tasklet_kill(&adapter->neq_tasklet);
3502
3503         ehea_destroy_eq(adapter->neq);
3504         ehea_remove_adapter_mr(adapter);
3505         list_del(&adapter->list);
3506
3507         ehea_update_firmware_handles();
3508
3509         return 0;
3510 }
3511
3512 static int check_module_parm(void)
3513 {
3514         int ret = 0;
3515
3516         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3517             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3518                 pr_info("Bad parameter: rq1_entries\n");
3519                 ret = -EINVAL;
3520         }
3521         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3522             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3523                 pr_info("Bad parameter: rq2_entries\n");
3524                 ret = -EINVAL;
3525         }
3526         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3527             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3528                 pr_info("Bad parameter: rq3_entries\n");
3529                 ret = -EINVAL;
3530         }
3531         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3532             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3533                 pr_info("Bad parameter: sq_entries\n");
3534                 ret = -EINVAL;
3535         }
3536
3537         return ret;
3538 }
3539
3540 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3541 {
3542         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3543 }
3544
3545 static DRIVER_ATTR_RO(capabilities);
3546
3547 static int __init ehea_module_init(void)
3548 {
3549         int ret;
3550
3551         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3552
3553         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3554         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3555
3556         mutex_init(&ehea_fw_handles.lock);
3557         spin_lock_init(&ehea_bcmc_regs.lock);
3558
3559         ret = check_module_parm();
3560         if (ret)
3561                 goto out;
3562
3563         ret = ibmebus_register_driver(&ehea_driver);
3564         if (ret) {
3565                 pr_err("failed registering eHEA device driver on ebus\n");
3566                 goto out;
3567         }
3568
3569         ret = driver_create_file(&ehea_driver.driver,
3570                                  &driver_attr_capabilities);
3571         if (ret) {
3572                 pr_err("failed to register capabilities attribute, ret=%d\n",
3573                        ret);
3574                 goto out2;
3575         }
3576
3577         return ret;
3578
3579 out2:
3580         ibmebus_unregister_driver(&ehea_driver);
3581 out:
3582         return ret;
3583 }
3584
3585 static void __exit ehea_module_exit(void)
3586 {
3587         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3588         ibmebus_unregister_driver(&ehea_driver);
3589         ehea_unregister_memory_hooks();
3590         kfree(ehea_fw_handles.arr);
3591         kfree(ehea_bcmc_regs.arr);
3592         ehea_destroy_busmap();
3593 }
3594
3595 module_init(ehea_module_init);
3596 module_exit(ehea_module_exit);