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 struct rtnl_link_stats64 *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         return stats;
 356 }
 357
 358 static void ehea_update_stats(struct work_struct *work)
 359 {
 360         struct ehea_port *port =
 361                 container_of(work, struct ehea_port, stats_work.work);
 362         struct net_device *dev = port->netdev;
 363         struct rtnl_link_stats64 *stats = &port->stats;
 364         struct hcp_ehea_port_cb2 *cb2;
 365         u64 hret;
 366
 367         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 368         if (!cb2) {
 369                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 370                 goto resched;
 371         }
 372
 373         hret = ehea_h_query_ehea_port(port->adapter->handle,
 374                                       port->logical_port_id,
 375                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 376         if (hret != H_SUCCESS) {
 377                 netdev_err(dev, "query_ehea_port failed\n");
 378                 goto out_herr;
 379         }
 380
 381         if (netif_msg_hw(port))
 382                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 383
 384         stats->multicast = cb2->rxmcp;
 385         stats->rx_errors = cb2->rxuerr;
 386
 387 out_herr:
 388         free_page((unsigned long)cb2);
 389 resched:
 390         schedule_delayed_work(&port->stats_work,
 391                               round_jiffies_relative(msecs_to_jiffies(1000)));
 392 }
 393
 394 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 395 {
 396         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 397         struct net_device *dev = pr->port->netdev;
 398         int max_index_mask = pr->rq1_skba.len - 1;
 399         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 400         int adder = 0;
 401         int i;
 402
 403         pr->rq1_skba.os_skbs = 0;
 404
 405         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 406                 if (nr_of_wqes > 0)
 407                         pr->rq1_skba.index = index;
 408                 pr->rq1_skba.os_skbs = fill_wqes;
 409                 return;
 410         }
 411
 412         for (i = 0; i < fill_wqes; i++) {
 413                 if (!skb_arr_rq1[index]) {
 414                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 415                                                               EHEA_L_PKT_SIZE);
 416                         if (!skb_arr_rq1[index]) {
 417                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 418                                 break;
 419                         }
 420                 }
 421                 index--;
 422                 index &= max_index_mask;
 423                 adder++;
 424         }
 425
 426         if (adder == 0)
 427                 return;
 428
 429         /* Ring doorbell */
 430         ehea_update_rq1a(pr->qp, adder);
 431 }
 432
 433 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 434 {
 435         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 436         struct net_device *dev = pr->port->netdev;
 437         int i;
 438
 439         if (nr_rq1a > pr->rq1_skba.len) {
 440                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 441                 return;
 442         }
 443
 444         for (i = 0; i < nr_rq1a; i++) {
 445                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 446                 if (!skb_arr_rq1[i])
 447                         break;
 448         }
 449         /* Ring doorbell */
 450         ehea_update_rq1a(pr->qp, i - 1);
 451 }
 452
 453 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 454                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 455                               int num_wqes, int wqe_type, int packet_size)
 456 {
 457         struct net_device *dev = pr->port->netdev;
 458         struct ehea_qp *qp = pr->qp;
 459         struct sk_buff **skb_arr = q_skba->arr;
 460         struct ehea_rwqe *rwqe;
 461         int i, index, max_index_mask, fill_wqes;
 462         int adder = 0;
 463         int ret = 0;
 464
 465         fill_wqes = q_skba->os_skbs + num_wqes;
 466         q_skba->os_skbs = 0;
 467
 468         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 469                 q_skba->os_skbs = fill_wqes;
 470                 return ret;
 471         }
 472
 473         index = q_skba->index;
 474         max_index_mask = q_skba->len - 1;
 475         for (i = 0; i < fill_wqes; i++) {
 476                 u64 tmp_addr;
 477                 struct sk_buff *skb;
 478
 479                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 480                 if (!skb) {
 481                         q_skba->os_skbs = fill_wqes - i;
 482                         if (q_skba->os_skbs == q_skba->len - 2) {
 483                                 netdev_info(pr->port->netdev,
 484                                             "rq%i ran dry - no mem for skb\n",
 485                                             rq_nr);
 486                                 ret = -ENOMEM;
 487                         }
 488                         break;
 489                 }
 490
 491                 skb_arr[index] = skb;
 492                 tmp_addr = ehea_map_vaddr(skb->data);
 493                 if (tmp_addr == -1) {
 494                         dev_consume_skb_any(skb);
 495                         q_skba->os_skbs = fill_wqes - i;
 496                         ret = 0;
 497                         break;
 498                 }
 499
 500                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 501                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 502                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 503                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 504                 rwqe->sg_list[0].vaddr = tmp_addr;
 505                 rwqe->sg_list[0].len = packet_size;
 506                 rwqe->data_segments = 1;
 507
 508                 index++;
 509                 index &= max_index_mask;
 510                 adder++;
 511         }
 512
 513         q_skba->index = index;
 514         if (adder == 0)
 515                 goto out;
 516
 517         /* Ring doorbell */
 518         iosync();
 519         if (rq_nr == 2)
 520                 ehea_update_rq2a(pr->qp, adder);
 521         else
 522                 ehea_update_rq3a(pr->qp, adder);
 523 out:
 524         return ret;
 525 }
 526
 527
 528 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 529 {
 530         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 531                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 532                                   EHEA_RQ2_PKT_SIZE);
 533 }
 534
 535
 536 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 537 {
 538         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 539                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 540                                   EHEA_MAX_PACKET_SIZE);
 541 }
 542
 543 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 544 {
 545         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 546         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 547                 return 0;
 548         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 549             (cqe->header_length == 0))
 550                 return 0;
 551         return -EINVAL;
 552 }
 553
 554 static inline void ehea_fill_skb(struct net_device *dev,
 555                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 556                                  struct ehea_port_res *pr)
 557 {
 558         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 559
 560         skb_put(skb, length);
 561         skb->protocol = eth_type_trans(skb, dev);
 562
 563         /* The packet was not an IPV4 packet so a complemented checksum was
 564            calculated. The value is found in the Internet Checksum field. */
 565         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 566                 skb->ip_summed = CHECKSUM_COMPLETE;
 567                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 568         } else
 569                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 570
 571         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 572 }
 573
 574 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 575                                                int arr_len,
 576                                                struct ehea_cqe *cqe)
 577 {
 578         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 579         struct sk_buff *skb;
 580         void *pref;
 581         int x;
 582
 583         x = skb_index + 1;
 584         x &= (arr_len - 1);
 585
 586         pref = skb_array[x];
 587         if (pref) {
 588                 prefetchw(pref);
 589                 prefetchw(pref + EHEA_CACHE_LINE);
 590
 591                 pref = (skb_array[x]->data);
 592                 prefetch(pref);
 593                 prefetch(pref + EHEA_CACHE_LINE);
 594                 prefetch(pref + EHEA_CACHE_LINE * 2);
 595                 prefetch(pref + EHEA_CACHE_LINE * 3);
 596         }
 597
 598         skb = skb_array[skb_index];
 599         skb_array[skb_index] = NULL;
 600         return skb;
 601 }
 602
 603 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 604                                                   int arr_len, int wqe_index)
 605 {
 606         struct sk_buff *skb;
 607         void *pref;
 608         int x;
 609
 610         x = wqe_index + 1;
 611         x &= (arr_len - 1);
 612
 613         pref = skb_array[x];
 614         if (pref) {
 615                 prefetchw(pref);
 616                 prefetchw(pref + EHEA_CACHE_LINE);
 617
 618                 pref = (skb_array[x]->data);
 619                 prefetchw(pref);
 620                 prefetchw(pref + EHEA_CACHE_LINE);
 621         }
 622
 623         skb = skb_array[wqe_index];
 624         skb_array[wqe_index] = NULL;
 625         return skb;
 626 }
 627
 628 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 629                                  struct ehea_cqe *cqe, int *processed_rq2,
 630                                  int *processed_rq3)
 631 {
 632         struct sk_buff *skb;
 633
 634         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 635                 pr->p_stats.err_tcp_cksum++;
 636         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 637                 pr->p_stats.err_ip_cksum++;
 638         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 639                 pr->p_stats.err_frame_crc++;
 640
 641         if (rq == 2) {
 642                 *processed_rq2 += 1;
 643                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 644                 dev_kfree_skb(skb);
 645         } else if (rq == 3) {
 646                 *processed_rq3 += 1;
 647                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 648                 dev_kfree_skb(skb);
 649         }
 650
 651         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 652                 if (netif_msg_rx_err(pr->port)) {
 653                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 654                                pr->qp->init_attr.qp_nr);
 655                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 656                 }
 657                 ehea_schedule_port_reset(pr->port);
 658                 return 1;
 659         }
 660
 661         return 0;
 662 }
 663
 664 static int ehea_proc_rwqes(struct net_device *dev,
 665                            struct ehea_port_res *pr,
 666                            int budget)
 667 {
 668         struct ehea_port *port = pr->port;
 669         struct ehea_qp *qp = pr->qp;
 670         struct ehea_cqe *cqe;
 671         struct sk_buff *skb;
 672         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 673         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 674         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 675         int skb_arr_rq1_len = pr->rq1_skba.len;
 676         int skb_arr_rq2_len = pr->rq2_skba.len;
 677         int skb_arr_rq3_len = pr->rq3_skba.len;
 678         int processed, processed_rq1, processed_rq2, processed_rq3;
 679         u64 processed_bytes = 0;
 680         int wqe_index, last_wqe_index, rq, port_reset;
 681
 682         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 683         last_wqe_index = 0;
 684
 685         cqe = ehea_poll_rq1(qp, &wqe_index);
 686         while ((processed < budget) && cqe) {
 687                 ehea_inc_rq1(qp);
 688                 processed_rq1++;
 689                 processed++;
 690                 if (netif_msg_rx_status(port))
 691                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 692
 693                 last_wqe_index = wqe_index;
 694                 rmb();
 695                 if (!ehea_check_cqe(cqe, &rq)) {
 696                         if (rq == 1) {
 697                                 /* LL RQ1 */
 698                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 699                                                           skb_arr_rq1_len,
 700                                                           wqe_index);
 701                                 if (unlikely(!skb)) {
 702                                         netif_info(port, rx_err, dev,
 703                                                   "LL rq1: skb=NULL\n");
 704
 705                                         skb = netdev_alloc_skb(dev,
 706                                                                EHEA_L_PKT_SIZE);
 707                                         if (!skb)
 708                                                 break;
 709                                 }
 710                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 711                                                  cqe->num_bytes_transfered - 4);
 712                                 ehea_fill_skb(dev, skb, cqe, pr);
 713                         } else if (rq == 2) {
 714                                 /* RQ2 */
 715                                 skb = get_skb_by_index(skb_arr_rq2,
 716                                                        skb_arr_rq2_len, cqe);
 717                                 if (unlikely(!skb)) {
 718                                         netif_err(port, rx_err, dev,
 719                                                   "rq2: skb=NULL\n");
 720                                         break;
 721                                 }
 722                                 ehea_fill_skb(dev, skb, cqe, pr);
 723                                 processed_rq2++;
 724                         } else {
 725                                 /* RQ3 */
 726                                 skb = get_skb_by_index(skb_arr_rq3,
 727                                                        skb_arr_rq3_len, cqe);
 728                                 if (unlikely(!skb)) {
 729                                         netif_err(port, rx_err, dev,
 730                                                   "rq3: skb=NULL\n");
 731                                         break;
 732                                 }
 733                                 ehea_fill_skb(dev, skb, cqe, pr);
 734                                 processed_rq3++;
 735                         }
 736
 737                         processed_bytes += skb->len;
 738
 739                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 740                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 741                                                        cqe->vlan_tag);
 742
 743                         napi_gro_receive(&pr->napi, skb);
 744                 } else {
 745                         pr->p_stats.poll_receive_errors++;
 746                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 747                                                            &processed_rq2,
 748                                                            &processed_rq3);
 749                         if (port_reset)
 750                                 break;
 751                 }
 752                 cqe = ehea_poll_rq1(qp, &wqe_index);
 753         }
 754
 755         pr->rx_packets += processed;
 756         pr->rx_bytes += processed_bytes;
 757
 758         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 759         ehea_refill_rq2(pr, processed_rq2);
 760         ehea_refill_rq3(pr, processed_rq3);
 761
 762         return processed;
 763 }
 764
 765 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 766
 767 static void reset_sq_restart_flag(struct ehea_port *port)
 768 {
 769         int i;
 770
 771         for (i = 0; i < port->num_def_qps; i++) {
 772                 struct ehea_port_res *pr = &port->port_res[i];
 773                 pr->sq_restart_flag = 0;
 774         }
 775         wake_up(&port->restart_wq);
 776 }
 777
 778 static void check_sqs(struct ehea_port *port)
 779 {
 780         struct ehea_swqe *swqe;
 781         int swqe_index;
 782         int i, k;
 783
 784         for (i = 0; i < port->num_def_qps; i++) {
 785                 struct ehea_port_res *pr = &port->port_res[i];
 786                 int ret;
 787                 k = 0;
 788                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 789                 memset(swqe, 0, SWQE_HEADER_SIZE);
 790                 atomic_dec(&pr->swqe_avail);
 791
 792                 swqe->tx_control |= EHEA_SWQE_PURGE;
 793                 swqe->wr_id = SWQE_RESTART_CHECK;
 794                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 795                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 796                 swqe->immediate_data_length = 80;
 797
 798                 ehea_post_swqe(pr->qp, swqe);
 799
 800                 ret = wait_event_timeout(port->restart_wq,
 801                                          pr->sq_restart_flag == 0,
 802                                          msecs_to_jiffies(100));
 803
 804                 if (!ret) {
 805                         pr_err("HW/SW queues out of sync\n");
 806                         ehea_schedule_port_reset(pr->port);
 807                         return;
 808                 }
 809         }
 810 }
 811
 812
 813 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 814 {
 815         struct sk_buff *skb;
 816         struct ehea_cq *send_cq = pr->send_cq;
 817         struct ehea_cqe *cqe;
 818         int quota = my_quota;
 819         int cqe_counter = 0;
 820         int swqe_av = 0;
 821         int index;
 822         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 823                                                 pr - &pr->port->port_res[0]);
 824
 825         cqe = ehea_poll_cq(send_cq);
 826         while (cqe && (quota > 0)) {
 827                 ehea_inc_cq(send_cq);
 828
 829                 cqe_counter++;
 830                 rmb();
 831
 832                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 833                         pr->sq_restart_flag = 1;
 834                         swqe_av++;
 835                         break;
 836                 }
 837
 838                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 839                         pr_err("Bad send completion status=0x%04X\n",
 840                                cqe->status);
 841
 842                         if (netif_msg_tx_err(pr->port))
 843                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 844
 845                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 846                                 pr_err("Resetting port\n");
 847                                 ehea_schedule_port_reset(pr->port);
 848                                 break;
 849                         }
 850                 }
 851
 852                 if (netif_msg_tx_done(pr->port))
 853                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 854
 855                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 856                            == EHEA_SWQE2_TYPE)) {
 857
 858                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 859                         skb = pr->sq_skba.arr[index];
 860                         dev_consume_skb_any(skb);
 861                         pr->sq_skba.arr[index] = NULL;
 862                 }
 863
 864                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 865                 quota--;
 866
 867                 cqe = ehea_poll_cq(send_cq);
 868         }
 869
 870         ehea_update_feca(send_cq, cqe_counter);
 871         atomic_add(swqe_av, &pr->swqe_avail);
 872
 873         if (unlikely(netif_tx_queue_stopped(txq) &&
 874                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 875                 __netif_tx_lock(txq, smp_processor_id());
 876                 if (netif_tx_queue_stopped(txq) &&
 877                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 878                         netif_tx_wake_queue(txq);
 879                 __netif_tx_unlock(txq);
 880         }
 881
 882         wake_up(&pr->port->swqe_avail_wq);
 883
 884         return cqe;
 885 }
 886
 887 #define EHEA_POLL_MAX_CQES 65535
 888
 889 static int ehea_poll(struct napi_struct *napi, int budget)
 890 {
 891         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 892                                                 napi);
 893         struct net_device *dev = pr->port->netdev;
 894         struct ehea_cqe *cqe;
 895         struct ehea_cqe *cqe_skb = NULL;
 896         int wqe_index;
 897         int rx = 0;
 898
 899         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 900         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 901
 902         while (rx != budget) {
 903                 napi_complete(napi);
 904                 ehea_reset_cq_ep(pr->recv_cq);
 905                 ehea_reset_cq_ep(pr->send_cq);
 906                 ehea_reset_cq_n1(pr->recv_cq);
 907                 ehea_reset_cq_n1(pr->send_cq);
 908                 rmb();
 909                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 910                 cqe_skb = ehea_poll_cq(pr->send_cq);
 911
 912                 if (!cqe && !cqe_skb)
 913                         return rx;
 914
 915                 if (!napi_reschedule(napi))
 916                         return rx;
 917
 918                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 919                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 920         }
 921
 922         return rx;
 923 }
 924
 925 #ifdef CONFIG_NET_POLL_CONTROLLER
 926 static void ehea_netpoll(struct net_device *dev)
 927 {
 928         struct ehea_port *port = netdev_priv(dev);
 929         int i;
 930
 931         for (i = 0; i < port->num_def_qps; i++)
 932                 napi_schedule(&port->port_res[i].napi);
 933 }
 934 #endif
 935
 936 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 937 {
 938         struct ehea_port_res *pr = param;
 939
 940         napi_schedule(&pr->napi);
 941
 942         return IRQ_HANDLED;
 943 }
 944
 945 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 946 {
 947         struct ehea_port *port = param;
 948         struct ehea_eqe *eqe;
 949         struct ehea_qp *qp;
 950         u32 qp_token;
 951         u64 resource_type, aer, aerr;
 952         int reset_port = 0;
 953
 954         eqe = ehea_poll_eq(port->qp_eq);
 955
 956         while (eqe) {
 957                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 958                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 959                        eqe->entry, qp_token);
 960
 961                 qp = port->port_res[qp_token].qp;
 962
 963                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 964                                                 &aer, &aerr);
 965
 966                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 967                         if ((aer & EHEA_AER_RESET_MASK) ||
 968                             (aerr & EHEA_AERR_RESET_MASK))
 969                                  reset_port = 1;
 970                 } else
 971                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 972
 973                 eqe = ehea_poll_eq(port->qp_eq);
 974         }
 975
 976         if (reset_port) {
 977                 pr_err("Resetting port\n");
 978                 ehea_schedule_port_reset(port);
 979         }
 980
 981         return IRQ_HANDLED;
 982 }
 983
 984 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 985                                        int logical_port)
 986 {
 987         int i;
 988
 989         for (i = 0; i < EHEA_MAX_PORTS; i++)
 990                 if (adapter->port[i])
 991                         if (adapter->port[i]->logical_port_id == logical_port)
 992                                 return adapter->port[i];
 993         return NULL;
 994 }
 995
 996 int ehea_sense_port_attr(struct ehea_port *port)
 997 {
 998         int ret;
 999         u64 hret;
1000         struct hcp_ehea_port_cb0 *cb0;
1001
1002         /* may be called via ehea_neq_tasklet() */
1003         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1004         if (!cb0) {
1005                 pr_err("no mem for cb0\n");
1006                 ret = -ENOMEM;
1007                 goto out;
1008         }
1009
1010         hret = ehea_h_query_ehea_port(port->adapter->handle,
1011                                       port->logical_port_id, H_PORT_CB0,
1012                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1013                                       cb0);
1014         if (hret != H_SUCCESS) {
1015                 ret = -EIO;
1016                 goto out_free;
1017         }
1018
1019         /* MAC address */
1020         port->mac_addr = cb0->port_mac_addr << 16;
1021
1022         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1023                 ret = -EADDRNOTAVAIL;
1024                 goto out_free;
1025         }
1026
1027         /* Port speed */
1028         switch (cb0->port_speed) {
1029         case H_SPEED_10M_H:
1030                 port->port_speed = EHEA_SPEED_10M;
1031                 port->full_duplex = 0;
1032                 break;
1033         case H_SPEED_10M_F:
1034                 port->port_speed = EHEA_SPEED_10M;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_100M_H:
1038                 port->port_speed = EHEA_SPEED_100M;
1039                 port->full_duplex = 0;
1040                 break;
1041         case H_SPEED_100M_F:
1042                 port->port_speed = EHEA_SPEED_100M;
1043                 port->full_duplex = 1;
1044                 break;
1045         case H_SPEED_1G_F:
1046                 port->port_speed = EHEA_SPEED_1G;
1047                 port->full_duplex = 1;
1048                 break;
1049         case H_SPEED_10G_F:
1050                 port->port_speed = EHEA_SPEED_10G;
1051                 port->full_duplex = 1;
1052                 break;
1053         default:
1054                 port->port_speed = 0;
1055                 port->full_duplex = 0;
1056                 break;
1057         }
1058
1059         port->autoneg = 1;
1060         port->num_mcs = cb0->num_default_qps;
1061
1062         /* Number of default QPs */
1063         if (use_mcs)
1064                 port->num_def_qps = cb0->num_default_qps;
1065         else
1066                 port->num_def_qps = 1;
1067
1068         if (!port->num_def_qps) {
1069                 ret = -EINVAL;
1070                 goto out_free;
1071         }
1072
1073         ret = 0;
1074 out_free:
1075         if (ret || netif_msg_probe(port))
1076                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1077         free_page((unsigned long)cb0);
1078 out:
1079         return ret;
1080 }
1081
1082 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1083 {
1084         struct hcp_ehea_port_cb4 *cb4;
1085         u64 hret;
1086         int ret = 0;
1087
1088         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1089         if (!cb4) {
1090                 pr_err("no mem for cb4\n");
1091                 ret = -ENOMEM;
1092                 goto out;
1093         }
1094
1095         cb4->port_speed = port_speed;
1096
1097         netif_carrier_off(port->netdev);
1098
1099         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1100                                        port->logical_port_id,
1101                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1102         if (hret == H_SUCCESS) {
1103                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1104
1105                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1106                                               port->logical_port_id,
1107                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1108                                               cb4);
1109                 if (hret == H_SUCCESS) {
1110                         switch (cb4->port_speed) {
1111                         case H_SPEED_10M_H:
1112                                 port->port_speed = EHEA_SPEED_10M;
1113                                 port->full_duplex = 0;
1114                                 break;
1115                         case H_SPEED_10M_F:
1116                                 port->port_speed = EHEA_SPEED_10M;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_100M_H:
1120                                 port->port_speed = EHEA_SPEED_100M;
1121                                 port->full_duplex = 0;
1122                                 break;
1123                         case H_SPEED_100M_F:
1124                                 port->port_speed = EHEA_SPEED_100M;
1125                                 port->full_duplex = 1;
1126                                 break;
1127                         case H_SPEED_1G_F:
1128                                 port->port_speed = EHEA_SPEED_1G;
1129                                 port->full_duplex = 1;
1130                                 break;
1131                         case H_SPEED_10G_F:
1132                                 port->port_speed = EHEA_SPEED_10G;
1133                                 port->full_duplex = 1;
1134                                 break;
1135                         default:
1136                                 port->port_speed = 0;
1137                                 port->full_duplex = 0;
1138                                 break;
1139                         }
1140                 } else {
1141                         pr_err("Failed sensing port speed\n");
1142                         ret = -EIO;
1143                 }
1144         } else {
1145                 if (hret == H_AUTHORITY) {
1146                         pr_info("Hypervisor denied setting port speed\n");
1147                         ret = -EPERM;
1148                 } else {
1149                         ret = -EIO;
1150                         pr_err("Failed setting port speed\n");
1151                 }
1152         }
1153         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1154                 netif_carrier_on(port->netdev);
1155
1156         free_page((unsigned long)cb4);
1157 out:
1158         return ret;
1159 }
1160
1161 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1162 {
1163         int ret;
1164         u8 ec;
1165         u8 portnum;
1166         struct ehea_port *port;
1167         struct net_device *dev;
1168
1169         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1170         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1171         port = ehea_get_port(adapter, portnum);
1172         if (!port) {
1173                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1174                 return;
1175         }
1176         dev = port->netdev;
1177
1178         switch (ec) {
1179         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1180
1181                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1182                         if (!netif_carrier_ok(dev)) {
1183                                 ret = ehea_sense_port_attr(port);
1184                                 if (ret) {
1185                                         netdev_err(dev, "failed resensing port attributes\n");
1186                                         break;
1187                                 }
1188
1189                                 netif_info(port, link, dev,
1190                                            "Logical port up: %dMbps %s Duplex\n",
1191                                            port->port_speed,
1192                                            port->full_duplex == 1 ?
1193                                            "Full" : "Half");
1194
1195                                 netif_carrier_on(dev);
1196                                 netif_wake_queue(dev);
1197                         }
1198                 } else
1199                         if (netif_carrier_ok(dev)) {
1200                                 netif_info(port, link, dev,
1201                                            "Logical port down\n");
1202                                 netif_carrier_off(dev);
1203                                 netif_tx_disable(dev);
1204                         }
1205
1206                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1207                         port->phy_link = EHEA_PHY_LINK_UP;
1208                         netif_info(port, link, dev,
1209                                    "Physical port up\n");
1210                         if (prop_carrier_state)
1211                                 netif_carrier_on(dev);
1212                 } else {
1213                         port->phy_link = EHEA_PHY_LINK_DOWN;
1214                         netif_info(port, link, dev,
1215                                    "Physical port down\n");
1216                         if (prop_carrier_state)
1217                                 netif_carrier_off(dev);
1218                 }
1219
1220                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1221                         netdev_info(dev,
1222                                     "External switch port is primary port\n");
1223                 else
1224                         netdev_info(dev,
1225                                     "External switch port is backup port\n");
1226
1227                 break;
1228         case EHEA_EC_ADAPTER_MALFUNC:
1229                 netdev_err(dev, "Adapter malfunction\n");
1230                 break;
1231         case EHEA_EC_PORT_MALFUNC:
1232                 netdev_info(dev, "Port malfunction\n");
1233                 netif_carrier_off(dev);
1234                 netif_tx_disable(dev);
1235                 break;
1236         default:
1237                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1238                 break;
1239         }
1240 }
1241
1242 static void ehea_neq_tasklet(unsigned long data)
1243 {
1244         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1245         struct ehea_eqe *eqe;
1246         u64 event_mask;
1247
1248         eqe = ehea_poll_eq(adapter->neq);
1249         pr_debug("eqe=%p\n", eqe);
1250
1251         while (eqe) {
1252                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1253                 ehea_parse_eqe(adapter, eqe->entry);
1254                 eqe = ehea_poll_eq(adapter->neq);
1255                 pr_debug("next eqe=%p\n", eqe);
1256         }
1257
1258         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1259                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1260                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1261
1262         ehea_h_reset_events(adapter->handle,
1263                             adapter->neq->fw_handle, event_mask);
1264 }
1265
1266 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1267 {
1268         struct ehea_adapter *adapter = param;
1269         tasklet_hi_schedule(&adapter->neq_tasklet);
1270         return IRQ_HANDLED;
1271 }
1272
1273
1274 static int ehea_fill_port_res(struct ehea_port_res *pr)
1275 {
1276         int ret;
1277         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1278
1279         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1280
1281         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1282
1283         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1284
1285         return ret;
1286 }
1287
1288 static int ehea_reg_interrupts(struct net_device *dev)
1289 {
1290         struct ehea_port *port = netdev_priv(dev);
1291         struct ehea_port_res *pr;
1292         int i, ret;
1293
1294
1295         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1296                  dev->name);
1297
1298         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1299                                   ehea_qp_aff_irq_handler,
1300                                   0, port->int_aff_name, port);
1301         if (ret) {
1302                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1303                            port->qp_eq->attr.ist1);
1304                 goto out_free_qpeq;
1305         }
1306
1307         netif_info(port, ifup, dev,
1308                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1309                    port->qp_eq->attr.ist1);
1310
1311
1312         for (i = 0; i < port->num_def_qps; i++) {
1313                 pr = &port->port_res[i];
1314                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1315                          "%s-queue%d", dev->name, i);
1316                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1317                                           ehea_recv_irq_handler,
1318                                           0, pr->int_send_name, pr);
1319                 if (ret) {
1320                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1321                                    i, pr->eq->attr.ist1);
1322                         goto out_free_req;
1323                 }
1324                 netif_info(port, ifup, dev,
1325                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1326                            pr->eq->attr.ist1, i);
1327         }
1328 out:
1329         return ret;
1330
1331
1332 out_free_req:
1333         while (--i >= 0) {
1334                 u32 ist = port->port_res[i].eq->attr.ist1;
1335                 ibmebus_free_irq(ist, &port->port_res[i]);
1336         }
1337
1338 out_free_qpeq:
1339         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1340         i = port->num_def_qps;
1341
1342         goto out;
1343
1344 }
1345
1346 static void ehea_free_interrupts(struct net_device *dev)
1347 {
1348         struct ehea_port *port = netdev_priv(dev);
1349         struct ehea_port_res *pr;
1350         int i;
1351
1352         /* send */
1353
1354         for (i = 0; i < port->num_def_qps; i++) {
1355                 pr = &port->port_res[i];
1356                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1357                 netif_info(port, intr, dev,
1358                            "free send irq for res %d with handle 0x%X\n",
1359                            i, pr->eq->attr.ist1);
1360         }
1361
1362         /* associated events */
1363         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1364         netif_info(port, intr, dev,
1365                    "associated event interrupt for handle 0x%X freed\n",
1366                    port->qp_eq->attr.ist1);
1367 }
1368
1369 static int ehea_configure_port(struct ehea_port *port)
1370 {
1371         int ret, i;
1372         u64 hret, mask;
1373         struct hcp_ehea_port_cb0 *cb0;
1374
1375         ret = -ENOMEM;
1376         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1377         if (!cb0)
1378                 goto out;
1379
1380         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1381                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1382                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1383                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1384                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1385                                       PXLY_RC_VLAN_FILTER)
1386                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1387
1388         for (i = 0; i < port->num_mcs; i++)
1389                 if (use_mcs)
1390                         cb0->default_qpn_arr[i] =
1391                                 port->port_res[i].qp->init_attr.qp_nr;
1392                 else
1393                         cb0->default_qpn_arr[i] =
1394                                 port->port_res[0].qp->init_attr.qp_nr;
1395
1396         if (netif_msg_ifup(port))
1397                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1398
1399         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1400              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1401
1402         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1403                                        port->logical_port_id,
1404                                        H_PORT_CB0, mask, cb0);
1405         ret = -EIO;
1406         if (hret != H_SUCCESS)
1407                 goto out_free;
1408
1409         ret = 0;
1410
1411 out_free:
1412         free_page((unsigned long)cb0);
1413 out:
1414         return ret;
1415 }
1416
1417 static int ehea_gen_smrs(struct ehea_port_res *pr)
1418 {
1419         int ret;
1420         struct ehea_adapter *adapter = pr->port->adapter;
1421
1422         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1423         if (ret)
1424                 goto out;
1425
1426         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1427         if (ret)
1428                 goto out_free;
1429
1430         return 0;
1431
1432 out_free:
1433         ehea_rem_mr(&pr->send_mr);
1434 out:
1435         pr_err("Generating SMRS failed\n");
1436         return -EIO;
1437 }
1438
1439 static int ehea_rem_smrs(struct ehea_port_res *pr)
1440 {
1441         if ((ehea_rem_mr(&pr->send_mr)) ||
1442             (ehea_rem_mr(&pr->recv_mr)))
1443                 return -EIO;
1444         else
1445                 return 0;
1446 }
1447
1448 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1449 {
1450         int arr_size = sizeof(void *) * max_q_entries;
1451
1452         q_skba->arr = vzalloc(arr_size);
1453         if (!q_skba->arr)
1454                 return -ENOMEM;
1455
1456         q_skba->len = max_q_entries;
1457         q_skba->index = 0;
1458         q_skba->os_skbs = 0;
1459
1460         return 0;
1461 }
1462
1463 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1464                               struct port_res_cfg *pr_cfg, int queue_token)
1465 {
1466         struct ehea_adapter *adapter = port->adapter;
1467         enum ehea_eq_type eq_type = EHEA_EQ;
1468         struct ehea_qp_init_attr *init_attr = NULL;
1469         int ret = -EIO;
1470         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1471
1472         tx_bytes = pr->tx_bytes;
1473         tx_packets = pr->tx_packets;
1474         rx_bytes = pr->rx_bytes;
1475         rx_packets = pr->rx_packets;
1476
1477         memset(pr, 0, sizeof(struct ehea_port_res));
1478
1479         pr->tx_bytes = rx_bytes;
1480         pr->tx_packets = tx_packets;
1481         pr->rx_bytes = rx_bytes;
1482         pr->rx_packets = rx_packets;
1483
1484         pr->port = port;
1485
1486         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1487         if (!pr->eq) {
1488                 pr_err("create_eq failed (eq)\n");
1489                 goto out_free;
1490         }
1491
1492         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1493                                      pr->eq->fw_handle,
1494                                      port->logical_port_id);
1495         if (!pr->recv_cq) {
1496                 pr_err("create_cq failed (cq_recv)\n");
1497                 goto out_free;
1498         }
1499
1500         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1501                                      pr->eq->fw_handle,
1502                                      port->logical_port_id);
1503         if (!pr->send_cq) {
1504                 pr_err("create_cq failed (cq_send)\n");
1505                 goto out_free;
1506         }
1507
1508         if (netif_msg_ifup(port))
1509                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1510                         pr->send_cq->attr.act_nr_of_cqes,
1511                         pr->recv_cq->attr.act_nr_of_cqes);
1512
1513         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1514         if (!init_attr) {
1515                 ret = -ENOMEM;
1516                 pr_err("no mem for ehea_qp_init_attr\n");
1517                 goto out_free;
1518         }
1519
1520         init_attr->low_lat_rq1 = 1;
1521         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1522         init_attr->rq_count = 3;
1523         init_attr->qp_token = queue_token;
1524         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1525         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1526         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1527         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1528         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1529         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1530         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1531         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1532         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1533         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1534         init_attr->port_nr = port->logical_port_id;
1535         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1536         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1537         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1538
1539         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1540         if (!pr->qp) {
1541                 pr_err("create_qp failed\n");
1542                 ret = -EIO;
1543                 goto out_free;
1544         }
1545
1546         if (netif_msg_ifup(port))
1547                 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",
1548                         init_attr->qp_nr,
1549                         init_attr->act_nr_send_wqes,
1550                         init_attr->act_nr_rwqes_rq1,
1551                         init_attr->act_nr_rwqes_rq2,
1552                         init_attr->act_nr_rwqes_rq3);
1553
1554         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1555
1556         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1557         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1558         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1559         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1560         if (ret)
1561                 goto out_free;
1562
1563         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1564         if (ehea_gen_smrs(pr) != 0) {
1565                 ret = -EIO;
1566                 goto out_free;
1567         }
1568
1569         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1570
1571         kfree(init_attr);
1572
1573         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1574
1575         ret = 0;
1576         goto out;
1577
1578 out_free:
1579         kfree(init_attr);
1580         vfree(pr->sq_skba.arr);
1581         vfree(pr->rq1_skba.arr);
1582         vfree(pr->rq2_skba.arr);
1583         vfree(pr->rq3_skba.arr);
1584         ehea_destroy_qp(pr->qp);
1585         ehea_destroy_cq(pr->send_cq);
1586         ehea_destroy_cq(pr->recv_cq);
1587         ehea_destroy_eq(pr->eq);
1588 out:
1589         return ret;
1590 }
1591
1592 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1593 {
1594         int ret, i;
1595
1596         if (pr->qp)
1597                 netif_napi_del(&pr->napi);
1598
1599         ret = ehea_destroy_qp(pr->qp);
1600
1601         if (!ret) {
1602                 ehea_destroy_cq(pr->send_cq);
1603                 ehea_destroy_cq(pr->recv_cq);
1604                 ehea_destroy_eq(pr->eq);
1605
1606                 for (i = 0; i < pr->rq1_skba.len; i++)
1607                         if (pr->rq1_skba.arr[i])
1608                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1609
1610                 for (i = 0; i < pr->rq2_skba.len; i++)
1611                         if (pr->rq2_skba.arr[i])
1612                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1613
1614                 for (i = 0; i < pr->rq3_skba.len; i++)
1615                         if (pr->rq3_skba.arr[i])
1616                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1617
1618                 for (i = 0; i < pr->sq_skba.len; i++)
1619                         if (pr->sq_skba.arr[i])
1620                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1621
1622                 vfree(pr->rq1_skba.arr);
1623                 vfree(pr->rq2_skba.arr);
1624                 vfree(pr->rq3_skba.arr);
1625                 vfree(pr->sq_skba.arr);
1626                 ret = ehea_rem_smrs(pr);
1627         }
1628         return ret;
1629 }
1630
1631 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1632                                   u32 lkey)
1633 {
1634         int skb_data_size = skb_headlen(skb);
1635         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1636         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1637         unsigned int immediate_len = SWQE2_MAX_IMM;
1638
1639         swqe->descriptors = 0;
1640
1641         if (skb_is_gso(skb)) {
1642                 swqe->tx_control |= EHEA_SWQE_TSO;
1643                 swqe->mss = skb_shinfo(skb)->gso_size;
1644                 /*
1645                  * For TSO packets we only copy the headers into the
1646                  * immediate area.
1647                  */
1648                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1649         }
1650
1651         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1652                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1653                 swqe->immediate_data_length = immediate_len;
1654
1655                 if (skb_data_size > immediate_len) {
1656                         sg1entry->l_key = lkey;
1657                         sg1entry->len = skb_data_size - immediate_len;
1658                         sg1entry->vaddr =
1659                                 ehea_map_vaddr(skb->data + immediate_len);
1660                         swqe->descriptors++;
1661                 }
1662         } else {
1663                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1664                 swqe->immediate_data_length = skb_data_size;
1665         }
1666 }
1667
1668 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1669                                     struct ehea_swqe *swqe, u32 lkey)
1670 {
1671         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1672         skb_frag_t *frag;
1673         int nfrags, sg1entry_contains_frag_data, i;
1674
1675         nfrags = skb_shinfo(skb)->nr_frags;
1676         sg1entry = &swqe->u.immdata_desc.sg_entry;
1677         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1678         sg1entry_contains_frag_data = 0;
1679
1680         write_swqe2_immediate(skb, swqe, lkey);
1681
1682         /* write descriptors */
1683         if (nfrags > 0) {
1684                 if (swqe->descriptors == 0) {
1685                         /* sg1entry not yet used */
1686                         frag = &skb_shinfo(skb)->frags[0];
1687
1688                         /* copy sg1entry data */
1689                         sg1entry->l_key = lkey;
1690                         sg1entry->len = skb_frag_size(frag);
1691                         sg1entry->vaddr =
1692                                 ehea_map_vaddr(skb_frag_address(frag));
1693                         swqe->descriptors++;
1694                         sg1entry_contains_frag_data = 1;
1695                 }
1696
1697                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1698
1699                         frag = &skb_shinfo(skb)->frags[i];
1700                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1701
1702                         sgentry->l_key = lkey;
1703                         sgentry->len = skb_frag_size(frag);
1704                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1705                         swqe->descriptors++;
1706                 }
1707         }
1708 }
1709
1710 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1711 {
1712         int ret = 0;
1713         u64 hret;
1714         u8 reg_type;
1715
1716         /* De/Register untagged packets */
1717         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1718         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1719                                      port->logical_port_id,
1720                                      reg_type, port->mac_addr, 0, hcallid);
1721         if (hret != H_SUCCESS) {
1722                 pr_err("%sregistering bc address failed (tagged)\n",
1723                        hcallid == H_REG_BCMC ? "" : "de");
1724                 ret = -EIO;
1725                 goto out_herr;
1726         }
1727
1728         /* De/Register VLAN packets */
1729         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1730         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1731                                      port->logical_port_id,
1732                                      reg_type, port->mac_addr, 0, hcallid);
1733         if (hret != H_SUCCESS) {
1734                 pr_err("%sregistering bc address failed (vlan)\n",
1735                        hcallid == H_REG_BCMC ? "" : "de");
1736                 ret = -EIO;
1737         }
1738 out_herr:
1739         return ret;
1740 }
1741
1742 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1743 {
1744         struct ehea_port *port = netdev_priv(dev);
1745         struct sockaddr *mac_addr = sa;
1746         struct hcp_ehea_port_cb0 *cb0;
1747         int ret;
1748         u64 hret;
1749
1750         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1751                 ret = -EADDRNOTAVAIL;
1752                 goto out;
1753         }
1754
1755         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1756         if (!cb0) {
1757                 pr_err("no mem for cb0\n");
1758                 ret = -ENOMEM;
1759                 goto out;
1760         }
1761
1762         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1763
1764         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1765
1766         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1767                                        port->logical_port_id, H_PORT_CB0,
1768                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1769         if (hret != H_SUCCESS) {
1770                 ret = -EIO;
1771                 goto out_free;
1772         }
1773
1774         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1775
1776         /* Deregister old MAC in pHYP */
1777         if (port->state == EHEA_PORT_UP) {
1778                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1779                 if (ret)
1780                         goto out_upregs;
1781         }
1782
1783         port->mac_addr = cb0->port_mac_addr << 16;
1784
1785         /* Register new MAC in pHYP */
1786         if (port->state == EHEA_PORT_UP) {
1787                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1788                 if (ret)
1789                         goto out_upregs;
1790         }
1791
1792         ret = 0;
1793
1794 out_upregs:
1795         ehea_update_bcmc_registrations();
1796 out_free:
1797         free_page((unsigned long)cb0);
1798 out:
1799         return ret;
1800 }
1801
1802 static void ehea_promiscuous_error(u64 hret, int enable)
1803 {
1804         if (hret == H_AUTHORITY)
1805                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1806                         enable == 1 ? "en" : "dis");
1807         else
1808                 pr_err("failed %sabling promiscuous mode\n",
1809                        enable == 1 ? "en" : "dis");
1810 }
1811
1812 static void ehea_promiscuous(struct net_device *dev, int enable)
1813 {
1814         struct ehea_port *port = netdev_priv(dev);
1815         struct hcp_ehea_port_cb7 *cb7;
1816         u64 hret;
1817
1818         if (enable == port->promisc)
1819                 return;
1820
1821         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1822         if (!cb7) {
1823                 pr_err("no mem for cb7\n");
1824                 goto out;
1825         }
1826
1827         /* Modify Pxs_DUCQPN in CB7 */
1828         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1829
1830         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1831                                        port->logical_port_id,
1832                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1833         if (hret) {
1834                 ehea_promiscuous_error(hret, enable);
1835                 goto out;
1836         }
1837
1838         port->promisc = enable;
1839 out:
1840         free_page((unsigned long)cb7);
1841 }
1842
1843 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1844                                      u32 hcallid)
1845 {
1846         u64 hret;
1847         u8 reg_type;
1848
1849         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1850         if (mc_mac_addr == 0)
1851                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1852
1853         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1854                                      port->logical_port_id,
1855                                      reg_type, mc_mac_addr, 0, hcallid);
1856         if (hret)
1857                 goto out;
1858
1859         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1860         if (mc_mac_addr == 0)
1861                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1862
1863         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1864                                      port->logical_port_id,
1865                                      reg_type, mc_mac_addr, 0, hcallid);
1866 out:
1867         return hret;
1868 }
1869
1870 static int ehea_drop_multicast_list(struct net_device *dev)
1871 {
1872         struct ehea_port *port = netdev_priv(dev);
1873         struct ehea_mc_list *mc_entry = port->mc_list;
1874         struct list_head *pos;
1875         struct list_head *temp;
1876         int ret = 0;
1877         u64 hret;
1878
1879         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1880                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1881
1882                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1883                                                  H_DEREG_BCMC);
1884                 if (hret) {
1885                         pr_err("failed deregistering mcast MAC\n");
1886                         ret = -EIO;
1887                 }
1888
1889                 list_del(pos);
1890                 kfree(mc_entry);
1891         }
1892         return ret;
1893 }
1894
1895 static void ehea_allmulti(struct net_device *dev, int enable)
1896 {
1897         struct ehea_port *port = netdev_priv(dev);
1898         u64 hret;
1899
1900         if (!port->allmulti) {
1901                 if (enable) {
1902                         /* Enable ALLMULTI */
1903                         ehea_drop_multicast_list(dev);
1904                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1905                         if (!hret)
1906                                 port->allmulti = 1;
1907                         else
1908                                 netdev_err(dev,
1909                                            "failed enabling IFF_ALLMULTI\n");
1910                 }
1911         } else {
1912                 if (!enable) {
1913                         /* Disable ALLMULTI */
1914                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1915                         if (!hret)
1916                                 port->allmulti = 0;
1917                         else
1918                                 netdev_err(dev,
1919                                            "failed disabling IFF_ALLMULTI\n");
1920                 }
1921         }
1922 }
1923
1924 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1925 {
1926         struct ehea_mc_list *ehea_mcl_entry;
1927         u64 hret;
1928
1929         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1930         if (!ehea_mcl_entry)
1931                 return;
1932
1933         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1934
1935         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1936
1937         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1938                                          H_REG_BCMC);
1939         if (!hret)
1940                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1941         else {
1942                 pr_err("failed registering mcast MAC\n");
1943                 kfree(ehea_mcl_entry);
1944         }
1945 }
1946
1947 static void ehea_set_multicast_list(struct net_device *dev)
1948 {
1949         struct ehea_port *port = netdev_priv(dev);
1950         struct netdev_hw_addr *ha;
1951         int ret;
1952
1953         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1954
1955         if (dev->flags & IFF_ALLMULTI) {
1956                 ehea_allmulti(dev, 1);
1957                 goto out;
1958         }
1959         ehea_allmulti(dev, 0);
1960
1961         if (!netdev_mc_empty(dev)) {
1962                 ret = ehea_drop_multicast_list(dev);
1963                 if (ret) {
1964                         /* Dropping the current multicast list failed.
1965                          * Enabling ALL_MULTI is the best we can do.
1966                          */
1967                         ehea_allmulti(dev, 1);
1968                 }
1969
1970                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1971                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1972                                 port->adapter->max_mc_mac);
1973                         goto out;
1974                 }
1975
1976                 netdev_for_each_mc_addr(ha, dev)
1977                         ehea_add_multicast_entry(port, ha->addr);
1978
1979         }
1980 out:
1981         ehea_update_bcmc_registrations();
1982 }
1983
1984 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1985 {
1986         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1987                 return -EINVAL;
1988         dev->mtu = new_mtu;
1989         return 0;
1990 }
1991
1992 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1993 {
1994         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1995
1996         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1997                 return;
1998
1999         if (skb->ip_summed == CHECKSUM_PARTIAL)
2000                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2001
2002         swqe->ip_start = skb_network_offset(skb);
2003         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2004
2005         switch (ip_hdr(skb)->protocol) {
2006         case IPPROTO_UDP:
2007                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2008                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2009
2010                 swqe->tcp_offset = swqe->ip_end + 1 +
2011                                    offsetof(struct udphdr, check);
2012                 break;
2013
2014         case IPPROTO_TCP:
2015                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2016                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2017
2018                 swqe->tcp_offset = swqe->ip_end + 1 +
2019                                    offsetof(struct tcphdr, check);
2020                 break;
2021         }
2022 }
2023
2024 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2025                        struct ehea_swqe *swqe, u32 lkey)
2026 {
2027         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2028
2029         xmit_common(skb, swqe);
2030
2031         write_swqe2_data(skb, dev, swqe, lkey);
2032 }
2033
2034 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2035                        struct ehea_swqe *swqe)
2036 {
2037         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2038
2039         xmit_common(skb, swqe);
2040
2041         if (!skb->data_len)
2042                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2043         else
2044                 skb_copy_bits(skb, 0, imm_data, skb->len);
2045
2046         swqe->immediate_data_length = skb->len;
2047         dev_consume_skb_any(skb);
2048 }
2049
2050 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2051 {
2052         struct ehea_port *port = netdev_priv(dev);
2053         struct ehea_swqe *swqe;
2054         u32 lkey;
2055         int swqe_index;
2056         struct ehea_port_res *pr;
2057         struct netdev_queue *txq;
2058
2059         pr = &port->port_res[skb_get_queue_mapping(skb)];
2060         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2061
2062         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2063         memset(swqe, 0, SWQE_HEADER_SIZE);
2064         atomic_dec(&pr->swqe_avail);
2065
2066         if (skb_vlan_tag_present(skb)) {
2067                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2068                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2069         }
2070
2071         pr->tx_packets++;
2072         pr->tx_bytes += skb->len;
2073
2074         if (skb->len <= SWQE3_MAX_IMM) {
2075                 u32 sig_iv = port->sig_comp_iv;
2076                 u32 swqe_num = pr->swqe_id_counter;
2077                 ehea_xmit3(skb, dev, swqe);
2078                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2079                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2080                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2081                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2082                                                       sig_iv);
2083                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2084                         pr->swqe_ll_count = 0;
2085                 } else
2086                         pr->swqe_ll_count += 1;
2087         } else {
2088                 swqe->wr_id =
2089                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2090                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2091                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2092                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2093                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2094
2095                 pr->sq_skba.index++;
2096                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2097
2098                 lkey = pr->send_mr.lkey;
2099                 ehea_xmit2(skb, dev, swqe, lkey);
2100                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2101         }
2102         pr->swqe_id_counter += 1;
2103
2104         netif_info(port, tx_queued, dev,
2105                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2106         if (netif_msg_tx_queued(port))
2107                 ehea_dump(swqe, 512, "swqe");
2108
2109         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2110                 netif_tx_stop_queue(txq);
2111                 swqe->tx_control |= EHEA_SWQE_PURGE;
2112         }
2113
2114         ehea_post_swqe(pr->qp, swqe);
2115
2116         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2117                 pr->p_stats.queue_stopped++;
2118                 netif_tx_stop_queue(txq);
2119         }
2120
2121         return NETDEV_TX_OK;
2122 }
2123
2124 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2125 {
2126         struct ehea_port *port = netdev_priv(dev);
2127         struct ehea_adapter *adapter = port->adapter;
2128         struct hcp_ehea_port_cb1 *cb1;
2129         int index;
2130         u64 hret;
2131         int err = 0;
2132
2133         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2134         if (!cb1) {
2135                 pr_err("no mem for cb1\n");
2136                 err = -ENOMEM;
2137                 goto out;
2138         }
2139
2140         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2141                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142         if (hret != H_SUCCESS) {
2143                 pr_err("query_ehea_port failed\n");
2144                 err = -EINVAL;
2145                 goto out;
2146         }
2147
2148         index = (vid / 64);
2149         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2150
2151         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2152                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2153         if (hret != H_SUCCESS) {
2154                 pr_err("modify_ehea_port failed\n");
2155                 err = -EINVAL;
2156         }
2157 out:
2158         free_page((unsigned long)cb1);
2159         return err;
2160 }
2161
2162 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2163 {
2164         struct ehea_port *port = netdev_priv(dev);
2165         struct ehea_adapter *adapter = port->adapter;
2166         struct hcp_ehea_port_cb1 *cb1;
2167         int index;
2168         u64 hret;
2169         int err = 0;
2170
2171         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2172         if (!cb1) {
2173                 pr_err("no mem for cb1\n");
2174                 err = -ENOMEM;
2175                 goto out;
2176         }
2177
2178         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2179                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2180         if (hret != H_SUCCESS) {
2181                 pr_err("query_ehea_port failed\n");
2182                 err = -EINVAL;
2183                 goto out;
2184         }
2185
2186         index = (vid / 64);
2187         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2188
2189         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2190                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2191         if (hret != H_SUCCESS) {
2192                 pr_err("modify_ehea_port failed\n");
2193                 err = -EINVAL;
2194         }
2195 out:
2196         free_page((unsigned long)cb1);
2197         return err;
2198 }
2199
2200 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2201 {
2202         int ret = -EIO;
2203         u64 hret;
2204         u16 dummy16 = 0;
2205         u64 dummy64 = 0;
2206         struct hcp_modify_qp_cb0 *cb0;
2207
2208         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2209         if (!cb0) {
2210                 ret = -ENOMEM;
2211                 goto out;
2212         }
2213
2214         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2215                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2216         if (hret != H_SUCCESS) {
2217                 pr_err("query_ehea_qp failed (1)\n");
2218                 goto out;
2219         }
2220
2221         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2222         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2223                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2224                                      &dummy64, &dummy64, &dummy16, &dummy16);
2225         if (hret != H_SUCCESS) {
2226                 pr_err("modify_ehea_qp failed (1)\n");
2227                 goto out;
2228         }
2229
2230         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2231                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2232         if (hret != H_SUCCESS) {
2233                 pr_err("query_ehea_qp failed (2)\n");
2234                 goto out;
2235         }
2236
2237         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2238         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2239                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2240                                      &dummy64, &dummy64, &dummy16, &dummy16);
2241         if (hret != H_SUCCESS) {
2242                 pr_err("modify_ehea_qp failed (2)\n");
2243                 goto out;
2244         }
2245
2246         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2247                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2248         if (hret != H_SUCCESS) {
2249                 pr_err("query_ehea_qp failed (3)\n");
2250                 goto out;
2251         }
2252
2253         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2254         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2255                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2256                                      &dummy64, &dummy64, &dummy16, &dummy16);
2257         if (hret != H_SUCCESS) {
2258                 pr_err("modify_ehea_qp failed (3)\n");
2259                 goto out;
2260         }
2261
2262         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2263                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2264         if (hret != H_SUCCESS) {
2265                 pr_err("query_ehea_qp failed (4)\n");
2266                 goto out;
2267         }
2268
2269         ret = 0;
2270 out:
2271         free_page((unsigned long)cb0);
2272         return ret;
2273 }
2274
2275 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2276 {
2277         int ret, i;
2278         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2279         enum ehea_eq_type eq_type = EHEA_EQ;
2280
2281         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2282                                    EHEA_MAX_ENTRIES_EQ, 1);
2283         if (!port->qp_eq) {
2284                 ret = -EINVAL;
2285                 pr_err("ehea_create_eq failed (qp_eq)\n");
2286                 goto out_kill_eq;
2287         }
2288
2289         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2290         pr_cfg.max_entries_scq = sq_entries * 2;
2291         pr_cfg.max_entries_sq = sq_entries;
2292         pr_cfg.max_entries_rq1 = rq1_entries;
2293         pr_cfg.max_entries_rq2 = rq2_entries;
2294         pr_cfg.max_entries_rq3 = rq3_entries;
2295
2296         pr_cfg_small_rx.max_entries_rcq = 1;
2297         pr_cfg_small_rx.max_entries_scq = sq_entries;
2298         pr_cfg_small_rx.max_entries_sq = sq_entries;
2299         pr_cfg_small_rx.max_entries_rq1 = 1;
2300         pr_cfg_small_rx.max_entries_rq2 = 1;
2301         pr_cfg_small_rx.max_entries_rq3 = 1;
2302
2303         for (i = 0; i < def_qps; i++) {
2304                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2305                 if (ret)
2306                         goto out_clean_pr;
2307         }
2308         for (i = def_qps; i < def_qps; i++) {
2309                 ret = ehea_init_port_res(port, &port->port_res[i],
2310                                          &pr_cfg_small_rx, i);
2311                 if (ret)
2312                         goto out_clean_pr;
2313         }
2314
2315         return 0;
2316
2317 out_clean_pr:
2318         while (--i >= 0)
2319                 ehea_clean_portres(port, &port->port_res[i]);
2320
2321 out_kill_eq:
2322         ehea_destroy_eq(port->qp_eq);
2323         return ret;
2324 }
2325
2326 static int ehea_clean_all_portres(struct ehea_port *port)
2327 {
2328         int ret = 0;
2329         int i;
2330
2331         for (i = 0; i < port->num_def_qps; i++)
2332                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2333
2334         ret |= ehea_destroy_eq(port->qp_eq);
2335
2336         return ret;
2337 }
2338
2339 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2340 {
2341         if (adapter->active_ports)
2342                 return;
2343
2344         ehea_rem_mr(&adapter->mr);
2345 }
2346
2347 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2348 {
2349         if (adapter->active_ports)
2350                 return 0;
2351
2352         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2353 }
2354
2355 static int ehea_up(struct net_device *dev)
2356 {
2357         int ret, i;
2358         struct ehea_port *port = netdev_priv(dev);
2359
2360         if (port->state == EHEA_PORT_UP)
2361                 return 0;
2362
2363         ret = ehea_port_res_setup(port, port->num_def_qps);
2364         if (ret) {
2365                 netdev_err(dev, "port_res_failed\n");
2366                 goto out;
2367         }
2368
2369         /* Set default QP for this port */
2370         ret = ehea_configure_port(port);
2371         if (ret) {
2372                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2373                 goto out_clean_pr;
2374         }
2375
2376         ret = ehea_reg_interrupts(dev);
2377         if (ret) {
2378                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2379                 goto out_clean_pr;
2380         }
2381
2382         for (i = 0; i < port->num_def_qps; i++) {
2383                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2384                 if (ret) {
2385                         netdev_err(dev, "activate_qp failed\n");
2386                         goto out_free_irqs;
2387                 }
2388         }
2389
2390         for (i = 0; i < port->num_def_qps; i++) {
2391                 ret = ehea_fill_port_res(&port->port_res[i]);
2392                 if (ret) {
2393                         netdev_err(dev, "out_free_irqs\n");
2394                         goto out_free_irqs;
2395                 }
2396         }
2397
2398         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2399         if (ret) {
2400                 ret = -EIO;
2401                 goto out_free_irqs;
2402         }
2403
2404         port->state = EHEA_PORT_UP;
2405
2406         ret = 0;
2407         goto out;
2408
2409 out_free_irqs:
2410         ehea_free_interrupts(dev);
2411
2412 out_clean_pr:
2413         ehea_clean_all_portres(port);
2414 out:
2415         if (ret)
2416                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2417
2418         ehea_update_bcmc_registrations();
2419         ehea_update_firmware_handles();
2420
2421         return ret;
2422 }
2423
2424 static void port_napi_disable(struct ehea_port *port)
2425 {
2426         int i;
2427
2428         for (i = 0; i < port->num_def_qps; i++)
2429                 napi_disable(&port->port_res[i].napi);
2430 }
2431
2432 static void port_napi_enable(struct ehea_port *port)
2433 {
2434         int i;
2435
2436         for (i = 0; i < port->num_def_qps; i++)
2437                 napi_enable(&port->port_res[i].napi);
2438 }
2439
2440 static int ehea_open(struct net_device *dev)
2441 {
2442         int ret;
2443         struct ehea_port *port = netdev_priv(dev);
2444
2445         mutex_lock(&port->port_lock);
2446
2447         netif_info(port, ifup, dev, "enabling port\n");
2448
2449         netif_carrier_off(dev);
2450
2451         ret = ehea_up(dev);
2452         if (!ret) {
2453                 port_napi_enable(port);
2454                 netif_tx_start_all_queues(dev);
2455         }
2456
2457         mutex_unlock(&port->port_lock);
2458         schedule_delayed_work(&port->stats_work,
2459                               round_jiffies_relative(msecs_to_jiffies(1000)));
2460
2461         return ret;
2462 }
2463
2464 static int ehea_down(struct net_device *dev)
2465 {
2466         int ret;
2467         struct ehea_port *port = netdev_priv(dev);
2468
2469         if (port->state == EHEA_PORT_DOWN)
2470                 return 0;
2471
2472         ehea_drop_multicast_list(dev);
2473         ehea_allmulti(dev, 0);
2474         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2475
2476         ehea_free_interrupts(dev);
2477
2478         port->state = EHEA_PORT_DOWN;
2479
2480         ehea_update_bcmc_registrations();
2481
2482         ret = ehea_clean_all_portres(port);
2483         if (ret)
2484                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2485
2486         ehea_update_firmware_handles();
2487
2488         return ret;
2489 }
2490
2491 static int ehea_stop(struct net_device *dev)
2492 {
2493         int ret;
2494         struct ehea_port *port = netdev_priv(dev);
2495
2496         netif_info(port, ifdown, dev, "disabling port\n");
2497
2498         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2499         cancel_work_sync(&port->reset_task);
2500         cancel_delayed_work_sync(&port->stats_work);
2501         mutex_lock(&port->port_lock);
2502         netif_tx_stop_all_queues(dev);
2503         port_napi_disable(port);
2504         ret = ehea_down(dev);
2505         mutex_unlock(&port->port_lock);
2506         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2507         return ret;
2508 }
2509
2510 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2511 {
2512         struct ehea_qp qp = *orig_qp;
2513         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2514         struct ehea_swqe *swqe;
2515         int wqe_index;
2516         int i;
2517
2518         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2519                 swqe = ehea_get_swqe(&qp, &wqe_index);
2520                 swqe->tx_control |= EHEA_SWQE_PURGE;
2521         }
2522 }
2523
2524 static void ehea_flush_sq(struct ehea_port *port)
2525 {
2526         int i;
2527
2528         for (i = 0; i < port->num_def_qps; i++) {
2529                 struct ehea_port_res *pr = &port->port_res[i];
2530                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2531                 int ret;
2532
2533                 ret = wait_event_timeout(port->swqe_avail_wq,
2534                          atomic_read(&pr->swqe_avail) >= swqe_max,
2535                          msecs_to_jiffies(100));
2536
2537                 if (!ret) {
2538                         pr_err("WARNING: sq not flushed completely\n");
2539                         break;
2540                 }
2541         }
2542 }
2543
2544 static int ehea_stop_qps(struct net_device *dev)
2545 {
2546         struct ehea_port *port = netdev_priv(dev);
2547         struct ehea_adapter *adapter = port->adapter;
2548         struct hcp_modify_qp_cb0 *cb0;
2549         int ret = -EIO;
2550         int dret;
2551         int i;
2552         u64 hret;
2553         u64 dummy64 = 0;
2554         u16 dummy16 = 0;
2555
2556         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2557         if (!cb0) {
2558                 ret = -ENOMEM;
2559                 goto out;
2560         }
2561
2562         for (i = 0; i < (port->num_def_qps); i++) {
2563                 struct ehea_port_res *pr =  &port->port_res[i];
2564                 struct ehea_qp *qp = pr->qp;
2565
2566                 /* Purge send queue */
2567                 ehea_purge_sq(qp);
2568
2569                 /* Disable queue pair */
2570                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2571                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2572                                             cb0);
2573                 if (hret != H_SUCCESS) {
2574                         pr_err("query_ehea_qp failed (1)\n");
2575                         goto out;
2576                 }
2577
2578                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2579                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2580
2581                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2582                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2583                                                             1), cb0, &dummy64,
2584                                              &dummy64, &dummy16, &dummy16);
2585                 if (hret != H_SUCCESS) {
2586                         pr_err("modify_ehea_qp failed (1)\n");
2587                         goto out;
2588                 }
2589
2590                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2591                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2592                                             cb0);
2593                 if (hret != H_SUCCESS) {
2594                         pr_err("query_ehea_qp failed (2)\n");
2595                         goto out;
2596                 }
2597
2598                 /* deregister shared memory regions */
2599                 dret = ehea_rem_smrs(pr);
2600                 if (dret) {
2601                         pr_err("unreg shared memory region failed\n");
2602                         goto out;
2603                 }
2604         }
2605
2606         ret = 0;
2607 out:
2608         free_page((unsigned long)cb0);
2609
2610         return ret;
2611 }
2612
2613 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2614 {
2615         struct ehea_qp qp = *orig_qp;
2616         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2617         struct ehea_rwqe *rwqe;
2618         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2619         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2620         struct sk_buff *skb;
2621         u32 lkey = pr->recv_mr.lkey;
2622
2623
2624         int i;
2625         int index;
2626
2627         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2628                 rwqe = ehea_get_next_rwqe(&qp, 2);
2629                 rwqe->sg_list[0].l_key = lkey;
2630                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2631                 skb = skba_rq2[index];
2632                 if (skb)
2633                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2634         }
2635
2636         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2637                 rwqe = ehea_get_next_rwqe(&qp, 3);
2638                 rwqe->sg_list[0].l_key = lkey;
2639                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2640                 skb = skba_rq3[index];
2641                 if (skb)
2642                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2643         }
2644 }
2645
2646 static int ehea_restart_qps(struct net_device *dev)
2647 {
2648         struct ehea_port *port = netdev_priv(dev);
2649         struct ehea_adapter *adapter = port->adapter;
2650         int ret = 0;
2651         int i;
2652
2653         struct hcp_modify_qp_cb0 *cb0;
2654         u64 hret;
2655         u64 dummy64 = 0;
2656         u16 dummy16 = 0;
2657
2658         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2659         if (!cb0) {
2660                 ret = -ENOMEM;
2661                 goto out;
2662         }
2663
2664         for (i = 0; i < (port->num_def_qps); i++) {
2665                 struct ehea_port_res *pr =  &port->port_res[i];
2666                 struct ehea_qp *qp = pr->qp;
2667
2668                 ret = ehea_gen_smrs(pr);
2669                 if (ret) {
2670                         netdev_err(dev, "creation of shared memory regions failed\n");
2671                         goto out;
2672                 }
2673
2674                 ehea_update_rqs(qp, pr);
2675
2676                 /* Enable queue pair */
2677                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2678                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2679                                             cb0);
2680                 if (hret != H_SUCCESS) {
2681                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2682                         goto out;
2683                 }
2684
2685                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2686                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2687
2688                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2690                                                             1), cb0, &dummy64,
2691                                              &dummy64, &dummy16, &dummy16);
2692                 if (hret != H_SUCCESS) {
2693                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2694                         goto out;
2695                 }
2696
2697                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2698                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2699                                             cb0);
2700                 if (hret != H_SUCCESS) {
2701                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2702                         goto out;
2703                 }
2704
2705                 /* refill entire queue */
2706                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2707                 ehea_refill_rq2(pr, 0);
2708                 ehea_refill_rq3(pr, 0);
2709         }
2710 out:
2711         free_page((unsigned long)cb0);
2712
2713         return ret;
2714 }
2715
2716 static void ehea_reset_port(struct work_struct *work)
2717 {
2718         int ret;
2719         struct ehea_port *port =
2720                 container_of(work, struct ehea_port, reset_task);
2721         struct net_device *dev = port->netdev;
2722
2723         mutex_lock(&dlpar_mem_lock);
2724         port->resets++;
2725         mutex_lock(&port->port_lock);
2726         netif_tx_disable(dev);
2727
2728         port_napi_disable(port);
2729
2730         ehea_down(dev);
2731
2732         ret = ehea_up(dev);
2733         if (ret)
2734                 goto out;
2735
2736         ehea_set_multicast_list(dev);
2737
2738         netif_info(port, timer, dev, "reset successful\n");
2739
2740         port_napi_enable(port);
2741
2742         netif_tx_wake_all_queues(dev);
2743 out:
2744         mutex_unlock(&port->port_lock);
2745         mutex_unlock(&dlpar_mem_lock);
2746 }
2747
2748 static void ehea_rereg_mrs(void)
2749 {
2750         int ret, i;
2751         struct ehea_adapter *adapter;
2752
2753         pr_info("LPAR memory changed - re-initializing driver\n");
2754
2755         list_for_each_entry(adapter, &adapter_list, list)
2756                 if (adapter->active_ports) {
2757                         /* Shutdown all ports */
2758                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2759                                 struct ehea_port *port = adapter->port[i];
2760                                 struct net_device *dev;
2761
2762                                 if (!port)
2763                                         continue;
2764
2765                                 dev = port->netdev;
2766
2767                                 if (dev->flags & IFF_UP) {
2768                                         mutex_lock(&port->port_lock);
2769                                         netif_tx_disable(dev);
2770                                         ehea_flush_sq(port);
2771                                         ret = ehea_stop_qps(dev);
2772                                         if (ret) {
2773                                                 mutex_unlock(&port->port_lock);
2774                                                 goto out;
2775                                         }
2776                                         port_napi_disable(port);
2777                                         mutex_unlock(&port->port_lock);
2778                                 }
2779                                 reset_sq_restart_flag(port);
2780                         }
2781
2782                         /* Unregister old memory region */
2783                         ret = ehea_rem_mr(&adapter->mr);
2784                         if (ret) {
2785                                 pr_err("unregister MR failed - driver inoperable!\n");
2786                                 goto out;
2787                         }
2788                 }
2789
2790         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2791
2792         list_for_each_entry(adapter, &adapter_list, list)
2793                 if (adapter->active_ports) {
2794                         /* Register new memory region */
2795                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2796                         if (ret) {
2797                                 pr_err("register MR failed - driver inoperable!\n");
2798                                 goto out;
2799                         }
2800
2801                         /* Restart all ports */
2802                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2803                                 struct ehea_port *port = adapter->port[i];
2804
2805                                 if (port) {
2806                                         struct net_device *dev = port->netdev;
2807
2808                                         if (dev->flags & IFF_UP) {
2809                                                 mutex_lock(&port->port_lock);
2810                                                 ret = ehea_restart_qps(dev);
2811                                                 if (!ret) {
2812                                                         check_sqs(port);
2813                                                         port_napi_enable(port);
2814                                                         netif_tx_wake_all_queues(dev);
2815                                                 } else {
2816                                                         netdev_err(dev, "Unable to restart QPS\n");
2817                                                 }
2818                                                 mutex_unlock(&port->port_lock);
2819                                         }
2820                                 }
2821                         }
2822                 }
2823         pr_info("re-initializing driver complete\n");
2824 out:
2825         return;
2826 }
2827
2828 static void ehea_tx_watchdog(struct net_device *dev)
2829 {
2830         struct ehea_port *port = netdev_priv(dev);
2831
2832         if (netif_carrier_ok(dev) &&
2833             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2834                 ehea_schedule_port_reset(port);
2835 }
2836
2837 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2838 {
2839         struct hcp_query_ehea *cb;
2840         u64 hret;
2841         int ret;
2842
2843         cb = (void *)get_zeroed_page(GFP_KERNEL);
2844         if (!cb) {
2845                 ret = -ENOMEM;
2846                 goto out;
2847         }
2848
2849         hret = ehea_h_query_ehea(adapter->handle, cb);
2850
2851         if (hret != H_SUCCESS) {
2852                 ret = -EIO;
2853                 goto out_herr;
2854         }
2855
2856         adapter->max_mc_mac = cb->max_mc_mac - 1;
2857         ret = 0;
2858
2859 out_herr:
2860         free_page((unsigned long)cb);
2861 out:
2862         return ret;
2863 }
2864
2865 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2866 {
2867         struct hcp_ehea_port_cb4 *cb4;
2868         u64 hret;
2869         int ret = 0;
2870
2871         *jumbo = 0;
2872
2873         /* (Try to) enable *jumbo frames */
2874         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2875         if (!cb4) {
2876                 pr_err("no mem for cb4\n");
2877                 ret = -ENOMEM;
2878                 goto out;
2879         } else {
2880                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2881                                               port->logical_port_id,
2882                                               H_PORT_CB4,
2883                                               H_PORT_CB4_JUMBO, cb4);
2884                 if (hret == H_SUCCESS) {
2885                         if (cb4->jumbo_frame)
2886                                 *jumbo = 1;
2887                         else {
2888                                 cb4->jumbo_frame = 1;
2889                                 hret = ehea_h_modify_ehea_port(port->adapter->
2890                                                                handle,
2891                                                                port->
2892                                                                logical_port_id,
2893                                                                H_PORT_CB4,
2894                                                                H_PORT_CB4_JUMBO,
2895                                                                cb4);
2896                                 if (hret == H_SUCCESS)
2897                                         *jumbo = 1;
2898                         }
2899                 } else
2900                         ret = -EINVAL;
2901
2902                 free_page((unsigned long)cb4);
2903         }
2904 out:
2905         return ret;
2906 }
2907
2908 static ssize_t ehea_show_port_id(struct device *dev,
2909                                  struct device_attribute *attr, char *buf)
2910 {
2911         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2912         return sprintf(buf, "%d", port->logical_port_id);
2913 }
2914
2915 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2916                    NULL);
2917
2918 static void logical_port_release(struct device *dev)
2919 {
2920         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2921         of_node_put(port->ofdev.dev.of_node);
2922 }
2923
2924 static struct device *ehea_register_port(struct ehea_port *port,
2925                                          struct device_node *dn)
2926 {
2927         int ret;
2928
2929         port->ofdev.dev.of_node = of_node_get(dn);
2930         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2931         port->ofdev.dev.bus = &ibmebus_bus_type;
2932
2933         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2934         port->ofdev.dev.release = logical_port_release;
2935
2936         ret = of_device_register(&port->ofdev);
2937         if (ret) {
2938                 pr_err("failed to register device. ret=%d\n", ret);
2939                 goto out;
2940         }
2941
2942         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2943         if (ret) {
2944                 pr_err("failed to register attributes, ret=%d\n", ret);
2945                 goto out_unreg_of_dev;
2946         }
2947
2948         return &port->ofdev.dev;
2949
2950 out_unreg_of_dev:
2951         of_device_unregister(&port->ofdev);
2952 out:
2953         return NULL;
2954 }
2955
2956 static void ehea_unregister_port(struct ehea_port *port)
2957 {
2958         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2959         of_device_unregister(&port->ofdev);
2960 }
2961
2962 static const struct net_device_ops ehea_netdev_ops = {
2963         .ndo_open               = ehea_open,
2964         .ndo_stop               = ehea_stop,
2965         .ndo_start_xmit         = ehea_start_xmit,
2966 #ifdef CONFIG_NET_POLL_CONTROLLER
2967         .ndo_poll_controller    = ehea_netpoll,
2968 #endif
2969         .ndo_get_stats64        = ehea_get_stats64,
2970         .ndo_set_mac_address    = ehea_set_mac_addr,
2971         .ndo_validate_addr      = eth_validate_addr,
2972         .ndo_set_rx_mode        = ehea_set_multicast_list,
2973         .ndo_change_mtu         = ehea_change_mtu,
2974         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2975         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2976         .ndo_tx_timeout         = ehea_tx_watchdog,
2977 };
2978
2979 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2980                                          u32 logical_port_id,
2981                                          struct device_node *dn)
2982 {
2983         int ret;
2984         struct net_device *dev;
2985         struct ehea_port *port;
2986         struct device *port_dev;
2987         int jumbo;
2988
2989         /* allocate memory for the port structures */
2990         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2991
2992         if (!dev) {
2993                 ret = -ENOMEM;
2994                 goto out_err;
2995         }
2996
2997         port = netdev_priv(dev);
2998
2999         mutex_init(&port->port_lock);
3000         port->state = EHEA_PORT_DOWN;
3001         port->sig_comp_iv = sq_entries / 10;
3002
3003         port->adapter = adapter;
3004         port->netdev = dev;
3005         port->logical_port_id = logical_port_id;
3006
3007         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3008
3009         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3010         if (!port->mc_list) {
3011                 ret = -ENOMEM;
3012                 goto out_free_ethdev;
3013         }
3014
3015         INIT_LIST_HEAD(&port->mc_list->list);
3016
3017         ret = ehea_sense_port_attr(port);
3018         if (ret)
3019                 goto out_free_mc_list;
3020
3021         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3022         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3023
3024         port_dev = ehea_register_port(port, dn);
3025         if (!port_dev)
3026                 goto out_free_mc_list;
3027
3028         SET_NETDEV_DEV(dev, port_dev);
3029
3030         /* initialize net_device structure */
3031         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3032
3033         dev->netdev_ops = &ehea_netdev_ops;
3034         ehea_set_ethtool_ops(dev);
3035
3036         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3037                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3038         dev->features = NETIF_F_SG | NETIF_F_TSO |
3039                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3040                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3041                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3042         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3043                         NETIF_F_IP_CSUM;
3044         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3045
3046         INIT_WORK(&port->reset_task, ehea_reset_port);
3047         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3048
3049         init_waitqueue_head(&port->swqe_avail_wq);
3050         init_waitqueue_head(&port->restart_wq);
3051
3052         memset(&port->stats, 0, sizeof(struct net_device_stats));
3053         ret = register_netdev(dev);
3054         if (ret) {
3055                 pr_err("register_netdev failed. ret=%d\n", ret);
3056                 goto out_unreg_port;
3057         }
3058
3059         ret = ehea_get_jumboframe_status(port, &jumbo);
3060         if (ret)
3061                 netdev_err(dev, "failed determining jumbo frame status\n");
3062
3063         netdev_info(dev, "Jumbo frames are %sabled\n",
3064                     jumbo == 1 ? "en" : "dis");
3065
3066         adapter->active_ports++;
3067
3068         return port;
3069
3070 out_unreg_port:
3071         ehea_unregister_port(port);
3072
3073 out_free_mc_list:
3074         kfree(port->mc_list);
3075
3076 out_free_ethdev:
3077         free_netdev(dev);
3078
3079 out_err:
3080         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3081                logical_port_id, ret);
3082         return NULL;
3083 }
3084
3085 static void ehea_shutdown_single_port(struct ehea_port *port)
3086 {
3087         struct ehea_adapter *adapter = port->adapter;
3088
3089         cancel_work_sync(&port->reset_task);
3090         cancel_delayed_work_sync(&port->stats_work);
3091         unregister_netdev(port->netdev);
3092         ehea_unregister_port(port);
3093         kfree(port->mc_list);
3094         free_netdev(port->netdev);
3095         adapter->active_ports--;
3096 }
3097
3098 static int ehea_setup_ports(struct ehea_adapter *adapter)
3099 {
3100         struct device_node *lhea_dn;
3101         struct device_node *eth_dn = NULL;
3102
3103         const u32 *dn_log_port_id;
3104         int i = 0;
3105
3106         lhea_dn = adapter->ofdev->dev.of_node;
3107         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3108
3109                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3110                                                  NULL);
3111                 if (!dn_log_port_id) {
3112                         pr_err("bad device node: eth_dn name=%s\n",
3113                                eth_dn->full_name);
3114                         continue;
3115                 }
3116
3117                 if (ehea_add_adapter_mr(adapter)) {
3118                         pr_err("creating MR failed\n");
3119                         of_node_put(eth_dn);
3120                         return -EIO;
3121                 }
3122
3123                 adapter->port[i] = ehea_setup_single_port(adapter,
3124                                                           *dn_log_port_id,
3125                                                           eth_dn);
3126                 if (adapter->port[i])
3127                         netdev_info(adapter->port[i]->netdev,
3128                                     "logical port id #%d\n", *dn_log_port_id);
3129                 else
3130                         ehea_remove_adapter_mr(adapter);
3131
3132                 i++;
3133         }
3134         return 0;
3135 }
3136
3137 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3138                                            u32 logical_port_id)
3139 {
3140         struct device_node *lhea_dn;
3141         struct device_node *eth_dn = NULL;
3142         const u32 *dn_log_port_id;
3143
3144         lhea_dn = adapter->ofdev->dev.of_node;
3145         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3146
3147                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3148                                                  NULL);
3149                 if (dn_log_port_id)
3150                         if (*dn_log_port_id == logical_port_id)
3151                                 return eth_dn;
3152         }
3153
3154         return NULL;
3155 }
3156
3157 static ssize_t ehea_probe_port(struct device *dev,
3158                                struct device_attribute *attr,
3159                                const char *buf, size_t count)
3160 {
3161         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3162         struct ehea_port *port;
3163         struct device_node *eth_dn = NULL;
3164         int i;
3165
3166         u32 logical_port_id;
3167
3168         sscanf(buf, "%d", &logical_port_id);
3169
3170         port = ehea_get_port(adapter, logical_port_id);
3171
3172         if (port) {
3173                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3174                             logical_port_id);
3175                 return -EINVAL;
3176         }
3177
3178         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3179
3180         if (!eth_dn) {
3181                 pr_info("no logical port with id %d found\n", logical_port_id);
3182                 return -EINVAL;
3183         }
3184
3185         if (ehea_add_adapter_mr(adapter)) {
3186                 pr_err("creating MR failed\n");
3187                 return -EIO;
3188         }
3189
3190         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3191
3192         of_node_put(eth_dn);
3193
3194         if (port) {
3195                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3196                         if (!adapter->port[i]) {
3197                                 adapter->port[i] = port;
3198                                 break;
3199                         }
3200
3201                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3202                             logical_port_id);
3203         } else {
3204                 ehea_remove_adapter_mr(adapter);
3205                 return -EIO;
3206         }
3207
3208         return (ssize_t) count;
3209 }
3210
3211 static ssize_t ehea_remove_port(struct device *dev,
3212                                 struct device_attribute *attr,
3213                                 const char *buf, size_t count)
3214 {
3215         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3216         struct ehea_port *port;
3217         int i;
3218         u32 logical_port_id;
3219
3220         sscanf(buf, "%d", &logical_port_id);
3221
3222         port = ehea_get_port(adapter, logical_port_id);
3223
3224         if (port) {
3225                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3226                             logical_port_id);
3227
3228                 ehea_shutdown_single_port(port);
3229
3230                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3231                         if (adapter->port[i] == port) {
3232                                 adapter->port[i] = NULL;
3233                                 break;
3234                         }
3235         } else {
3236                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3237                        logical_port_id);
3238                 return -EINVAL;
3239         }
3240
3241         ehea_remove_adapter_mr(adapter);
3242
3243         return (ssize_t) count;
3244 }
3245
3246 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3247 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3248
3249 static int ehea_create_device_sysfs(struct platform_device *dev)
3250 {
3251         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3252         if (ret)
3253                 goto out;
3254
3255         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3256 out:
3257         return ret;
3258 }
3259
3260 static void ehea_remove_device_sysfs(struct platform_device *dev)
3261 {
3262         device_remove_file(&dev->dev, &dev_attr_probe_port);
3263         device_remove_file(&dev->dev, &dev_attr_remove_port);
3264 }
3265
3266 static int ehea_reboot_notifier(struct notifier_block *nb,
3267                                 unsigned long action, void *unused)
3268 {
3269         if (action == SYS_RESTART) {
3270                 pr_info("Reboot: freeing all eHEA resources\n");
3271                 ibmebus_unregister_driver(&ehea_driver);
3272         }
3273         return NOTIFY_DONE;
3274 }
3275
3276 static struct notifier_block ehea_reboot_nb = {
3277         .notifier_call = ehea_reboot_notifier,
3278 };
3279
3280 static int ehea_mem_notifier(struct notifier_block *nb,
3281                              unsigned long action, void *data)
3282 {
3283         int ret = NOTIFY_BAD;
3284         struct memory_notify *arg = data;
3285
3286         mutex_lock(&dlpar_mem_lock);
3287
3288         switch (action) {
3289         case MEM_CANCEL_OFFLINE:
3290                 pr_info("memory offlining canceled");
3291                 /* Fall through: re-add canceled memory block */
3292
3293         case MEM_ONLINE:
3294                 pr_info("memory is going online");
3295                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3296                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3297                         goto out_unlock;
3298                 ehea_rereg_mrs();
3299                 break;
3300
3301         case MEM_GOING_OFFLINE:
3302                 pr_info("memory is going offline");
3303                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3304                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3305                         goto out_unlock;
3306                 ehea_rereg_mrs();
3307                 break;
3308
3309         default:
3310                 break;
3311         }
3312
3313         ehea_update_firmware_handles();
3314         ret = NOTIFY_OK;
3315
3316 out_unlock:
3317         mutex_unlock(&dlpar_mem_lock);
3318         return ret;
3319 }
3320
3321 static struct notifier_block ehea_mem_nb = {
3322         .notifier_call = ehea_mem_notifier,
3323 };
3324
3325 static void ehea_crash_handler(void)
3326 {
3327         int i;
3328
3329         if (ehea_fw_handles.arr)
3330                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3331                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3332                                              ehea_fw_handles.arr[i].fwh,
3333                                              FORCE_FREE);
3334
3335         if (ehea_bcmc_regs.arr)
3336                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3337                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3338                                               ehea_bcmc_regs.arr[i].port_id,
3339                                               ehea_bcmc_regs.arr[i].reg_type,
3340                                               ehea_bcmc_regs.arr[i].macaddr,
3341                                               0, H_DEREG_BCMC);
3342 }
3343
3344 static atomic_t ehea_memory_hooks_registered;
3345
3346 /* Register memory hooks on probe of first adapter */
3347 static int ehea_register_memory_hooks(void)
3348 {
3349         int ret = 0;
3350
3351         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3352                 return 0;
3353
3354         ret = ehea_create_busmap();
3355         if (ret) {
3356                 pr_info("ehea_create_busmap failed\n");
3357                 goto out;
3358         }
3359
3360         ret = register_reboot_notifier(&ehea_reboot_nb);
3361         if (ret) {
3362                 pr_info("register_reboot_notifier failed\n");
3363                 goto out;
3364         }
3365
3366         ret = register_memory_notifier(&ehea_mem_nb);
3367         if (ret) {
3368                 pr_info("register_memory_notifier failed\n");
3369                 goto out2;
3370         }
3371
3372         ret = crash_shutdown_register(ehea_crash_handler);
3373         if (ret) {
3374                 pr_info("crash_shutdown_register failed\n");
3375                 goto out3;
3376         }
3377
3378         return 0;
3379
3380 out3:
3381         unregister_memory_notifier(&ehea_mem_nb);
3382 out2:
3383         unregister_reboot_notifier(&ehea_reboot_nb);
3384 out:
3385         atomic_dec(&ehea_memory_hooks_registered);
3386         return ret;
3387 }
3388
3389 static void ehea_unregister_memory_hooks(void)
3390 {
3391         /* Only remove the hooks if we've registered them */
3392         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3393                 return;
3394
3395         unregister_reboot_notifier(&ehea_reboot_nb);
3396         if (crash_shutdown_unregister(ehea_crash_handler))
3397                 pr_info("failed unregistering crash handler\n");
3398         unregister_memory_notifier(&ehea_mem_nb);
3399 }
3400
3401 static int ehea_probe_adapter(struct platform_device *dev)
3402 {
3403         struct ehea_adapter *adapter;
3404         const u64 *adapter_handle;
3405         int ret;
3406         int i;
3407
3408         ret = ehea_register_memory_hooks();
3409         if (ret)
3410                 return ret;
3411
3412         if (!dev || !dev->dev.of_node) {
3413                 pr_err("Invalid ibmebus device probed\n");
3414                 return -EINVAL;
3415         }
3416
3417         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3418         if (!adapter) {
3419                 ret = -ENOMEM;
3420                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3421                 goto out;
3422         }
3423
3424         list_add(&adapter->list, &adapter_list);
3425
3426         adapter->ofdev = dev;
3427
3428         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3429                                          NULL);
3430         if (adapter_handle)
3431                 adapter->handle = *adapter_handle;
3432
3433         if (!adapter->handle) {
3434                 dev_err(&dev->dev, "failed getting handle for adapter"
3435                         " '%s'\n", dev->dev.of_node->full_name);
3436                 ret = -ENODEV;
3437                 goto out_free_ad;
3438         }
3439
3440         adapter->pd = EHEA_PD_ID;
3441
3442         platform_set_drvdata(dev, adapter);
3443
3444
3445         /* initialize adapter and ports */
3446         /* get adapter properties */
3447         ret = ehea_sense_adapter_attr(adapter);
3448         if (ret) {
3449                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3450                 goto out_free_ad;
3451         }
3452
3453         adapter->neq = ehea_create_eq(adapter,
3454                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3455         if (!adapter->neq) {
3456                 ret = -EIO;
3457                 dev_err(&dev->dev, "NEQ creation failed\n");
3458                 goto out_free_ad;
3459         }
3460
3461         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3462                      (unsigned long)adapter);
3463
3464         ret = ehea_create_device_sysfs(dev);
3465         if (ret)
3466                 goto out_kill_eq;
3467
3468         ret = ehea_setup_ports(adapter);
3469         if (ret) {
3470                 dev_err(&dev->dev, "setup_ports failed\n");
3471                 goto out_rem_dev_sysfs;
3472         }
3473
3474         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3475                                   ehea_interrupt_neq, 0,
3476                                   "ehea_neq", adapter);
3477         if (ret) {
3478                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3479                 goto out_shutdown_ports;
3480         }
3481
3482         /* Handle any events that might be pending. */
3483         tasklet_hi_schedule(&adapter->neq_tasklet);
3484
3485         ret = 0;
3486         goto out;
3487
3488 out_shutdown_ports:
3489         for (i = 0; i < EHEA_MAX_PORTS; i++)
3490                 if (adapter->port[i]) {
3491                         ehea_shutdown_single_port(adapter->port[i]);
3492                         adapter->port[i] = NULL;
3493                 }
3494
3495 out_rem_dev_sysfs:
3496         ehea_remove_device_sysfs(dev);
3497
3498 out_kill_eq:
3499         ehea_destroy_eq(adapter->neq);
3500
3501 out_free_ad:
3502         list_del(&adapter->list);
3503
3504 out:
3505         ehea_update_firmware_handles();
3506
3507         return ret;
3508 }
3509
3510 static int ehea_remove(struct platform_device *dev)
3511 {
3512         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3513         int i;
3514
3515         for (i = 0; i < EHEA_MAX_PORTS; i++)
3516                 if (adapter->port[i]) {
3517                         ehea_shutdown_single_port(adapter->port[i]);
3518                         adapter->port[i] = NULL;
3519                 }
3520
3521         ehea_remove_device_sysfs(dev);
3522
3523         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3524         tasklet_kill(&adapter->neq_tasklet);
3525
3526         ehea_destroy_eq(adapter->neq);
3527         ehea_remove_adapter_mr(adapter);
3528         list_del(&adapter->list);
3529
3530         ehea_update_firmware_handles();
3531
3532         return 0;
3533 }
3534
3535 static int check_module_parm(void)
3536 {
3537         int ret = 0;
3538
3539         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3540             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3541                 pr_info("Bad parameter: rq1_entries\n");
3542                 ret = -EINVAL;
3543         }
3544         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3545             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3546                 pr_info("Bad parameter: rq2_entries\n");
3547                 ret = -EINVAL;
3548         }
3549         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3550             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3551                 pr_info("Bad parameter: rq3_entries\n");
3552                 ret = -EINVAL;
3553         }
3554         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3555             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3556                 pr_info("Bad parameter: sq_entries\n");
3557                 ret = -EINVAL;
3558         }
3559
3560         return ret;
3561 }
3562
3563 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3564                                       char *buf)
3565 {
3566         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3567 }
3568
3569 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3570                    ehea_show_capabilities, NULL);
3571
3572 static int __init ehea_module_init(void)
3573 {
3574         int ret;
3575
3576         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3577
3578         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3579         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3580
3581         mutex_init(&ehea_fw_handles.lock);
3582         spin_lock_init(&ehea_bcmc_regs.lock);
3583
3584         ret = check_module_parm();
3585         if (ret)
3586                 goto out;
3587
3588         ret = ibmebus_register_driver(&ehea_driver);
3589         if (ret) {
3590                 pr_err("failed registering eHEA device driver on ebus\n");
3591                 goto out;
3592         }
3593
3594         ret = driver_create_file(&ehea_driver.driver,
3595                                  &driver_attr_capabilities);
3596         if (ret) {
3597                 pr_err("failed to register capabilities attribute, ret=%d\n",
3598                        ret);
3599                 goto out2;
3600         }
3601
3602         return ret;
3603
3604 out2:
3605         ibmebus_unregister_driver(&ehea_driver);
3606 out:
3607         return ret;
3608 }
3609
3610 static void __exit ehea_module_exit(void)
3611 {
3612         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3613         ibmebus_unregister_driver(&ehea_driver);
3614         ehea_unregister_memory_hooks();
3615         kfree(ehea_fw_handles.arr);
3616         kfree(ehea_bcmc_regs.arr);
3617         ehea_destroy_busmap();
3618 }
3619
3620 module_init(ehea_module_init);
3621 module_exit(ehea_module_exit);