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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   4  *
   5  *  eHEA ethernet device driver for IBM eServer System p
   6  *
   7  *  (C) Copyright IBM Corp. 2006
   8  *
   9  *  Authors:
  10  *       Christoph Raisch <raisch@de.ibm.com>
  11  *       Jan-Bernd Themann <themann@de.ibm.com>
  12  *       Thomas Klein <tklein@de.ibm.com>
  13  */
  14
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17 #include <linux/device.h>
  18 #include <linux/in.h>
  19 #include <linux/ip.h>
  20 #include <linux/tcp.h>
  21 #include <linux/udp.h>
  22 #include <linux/if.h>
  23 #include <linux/list.h>
  24 #include <linux/slab.h>
  25 #include <linux/if_ether.h>
  26 #include <linux/notifier.h>
  27 #include <linux/reboot.h>
  28 #include <linux/memory.h>
  29 #include <asm/kexec.h>
  30 #include <linux/mutex.h>
  31 #include <linux/prefetch.h>
  32
  33 #include <net/ip.h>
  34
  35 #include "ehea.h"
  36 #include "ehea_qmr.h"
  37 #include "ehea_phyp.h"
  38
  39
  40 MODULE_LICENSE("GPL");
  41 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  42 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  43 MODULE_VERSION(DRV_VERSION);
  44
  45
  46 static int msg_level = -1;
  47 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  48 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  49 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  50 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  51 static int use_mcs = 1;
  52 static int prop_carrier_state;
  53
  54 module_param(msg_level, int, 0);
  55 module_param(rq1_entries, int, 0);
  56 module_param(rq2_entries, int, 0);
  57 module_param(rq3_entries, int, 0);
  58 module_param(sq_entries, int, 0);
  59 module_param(prop_carrier_state, int, 0);
  60 module_param(use_mcs, int, 0);
  61
  62 MODULE_PARM_DESC(msg_level, "msg_level");
  63 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  64                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  65 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  66                  "[2^x - 1], x = [7..14]. Default = "
  67                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  68 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  69                  "[2^x - 1], x = [7..14]. Default = "
  70                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  71 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  72                  "[2^x - 1], x = [7..14]. Default = "
  73                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  74 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  75                  "[2^x - 1], x = [7..14]. Default = "
  76                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  77 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  78                  "Default = 1");
  79
  80 static int port_name_cnt;
  81 static LIST_HEAD(adapter_list);
  82 static unsigned long ehea_driver_flags;
  83 static DEFINE_MUTEX(dlpar_mem_lock);
  84 static struct ehea_fw_handle_array ehea_fw_handles;
  85 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  86
  87
  88 static int ehea_probe_adapter(struct platform_device *dev);
  89
  90 static int ehea_remove(struct platform_device *dev);
  91
  92 static const struct of_device_id ehea_module_device_table[] = {
  93         {
  94                 .name = "lhea",
  95                 .compatible = "IBM,lhea",
  96         },
  97         {
  98                 .type = "network",
  99                 .compatible = "IBM,lhea-ethernet",
 100         },
 101         {},
 102 };
 103 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 104
 105 static const struct of_device_id ehea_device_table[] = {
 106         {
 107                 .name = "lhea",
 108                 .compatible = "IBM,lhea",
 109         },
 110         {},
 111 };
 112
 113 static struct platform_driver ehea_driver = {
 114         .driver = {
 115                 .name = "ehea",
 116                 .owner = THIS_MODULE,
 117                 .of_match_table = ehea_device_table,
 118         },
 119         .probe = ehea_probe_adapter,
 120         .remove = ehea_remove,
 121 };
 122
 123 void ehea_dump(void *adr, int len, char *msg)
 124 {
 125         int x;
 126         unsigned char *deb = adr;
 127         for (x = 0; x < len; x += 16) {
 128                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 129                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 130                 deb += 16;
 131         }
 132 }
 133
 134 static void ehea_schedule_port_reset(struct ehea_port *port)
 135 {
 136         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 137                 schedule_work(&port->reset_task);
 138 }
 139
 140 static void ehea_update_firmware_handles(void)
 141 {
 142         struct ehea_fw_handle_entry *arr = NULL;
 143         struct ehea_adapter *adapter;
 144         int num_adapters = 0;
 145         int num_ports = 0;
 146         int num_portres = 0;
 147         int i = 0;
 148         int num_fw_handles, k, l;
 149
 150         /* Determine number of handles */
 151         mutex_lock(&ehea_fw_handles.lock);
 152
 153         list_for_each_entry(adapter, &adapter_list, list) {
 154                 num_adapters++;
 155
 156                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 157                         struct ehea_port *port = adapter->port[k];
 158
 159                         if (!port || (port->state != EHEA_PORT_UP))
 160                                 continue;
 161
 162                         num_ports++;
 163                         num_portres += port->num_def_qps;
 164                 }
 165         }
 166
 167         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 168                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 169                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 170
 171         if (num_fw_handles) {
 172                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 173                 if (!arr)
 174                         goto out;  /* Keep the existing array */
 175         } else
 176                 goto out_update;
 177
 178         list_for_each_entry(adapter, &adapter_list, list) {
 179                 if (num_adapters == 0)
 180                         break;
 181
 182                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 183                         struct ehea_port *port = adapter->port[k];
 184
 185                         if (!port || (port->state != EHEA_PORT_UP) ||
 186                             (num_ports == 0))
 187                                 continue;
 188
 189                         for (l = 0; l < port->num_def_qps; l++) {
 190                                 struct ehea_port_res *pr = &port->port_res[l];
 191
 192                                 arr[i].adh = adapter->handle;
 193                                 arr[i++].fwh = pr->qp->fw_handle;
 194                                 arr[i].adh = adapter->handle;
 195                                 arr[i++].fwh = pr->send_cq->fw_handle;
 196                                 arr[i].adh = adapter->handle;
 197                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 198                                 arr[i].adh = adapter->handle;
 199                                 arr[i++].fwh = pr->eq->fw_handle;
 200                                 arr[i].adh = adapter->handle;
 201                                 arr[i++].fwh = pr->send_mr.handle;
 202                                 arr[i].adh = adapter->handle;
 203                                 arr[i++].fwh = pr->recv_mr.handle;
 204                         }
 205                         arr[i].adh = adapter->handle;
 206                         arr[i++].fwh = port->qp_eq->fw_handle;
 207                         num_ports--;
 208                 }
 209
 210                 arr[i].adh = adapter->handle;
 211                 arr[i++].fwh = adapter->neq->fw_handle;
 212
 213                 if (adapter->mr.handle) {
 214                         arr[i].adh = adapter->handle;
 215                         arr[i++].fwh = adapter->mr.handle;
 216                 }
 217                 num_adapters--;
 218         }
 219
 220 out_update:
 221         kfree(ehea_fw_handles.arr);
 222         ehea_fw_handles.arr = arr;
 223         ehea_fw_handles.num_entries = i;
 224 out:
 225         mutex_unlock(&ehea_fw_handles.lock);
 226 }
 227
 228 static void ehea_update_bcmc_registrations(void)
 229 {
 230         unsigned long flags;
 231         struct ehea_bcmc_reg_entry *arr = NULL;
 232         struct ehea_adapter *adapter;
 233         struct ehea_mc_list *mc_entry;
 234         int num_registrations = 0;
 235         int i = 0;
 236         int k;
 237
 238         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 239
 240         /* Determine number of registrations */
 241         list_for_each_entry(adapter, &adapter_list, list)
 242                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 243                         struct ehea_port *port = adapter->port[k];
 244
 245                         if (!port || (port->state != EHEA_PORT_UP))
 246                                 continue;
 247
 248                         num_registrations += 2; /* Broadcast registrations */
 249
 250                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 251                                 num_registrations += 2;
 252                 }
 253
 254         if (num_registrations) {
 255                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 256                 if (!arr)
 257                         goto out;  /* Keep the existing array */
 258         } else
 259                 goto out_update;
 260
 261         list_for_each_entry(adapter, &adapter_list, list) {
 262                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 263                         struct ehea_port *port = adapter->port[k];
 264
 265                         if (!port || (port->state != EHEA_PORT_UP))
 266                                 continue;
 267
 268                         if (num_registrations == 0)
 269                                 goto out_update;
 270
 271                         arr[i].adh = adapter->handle;
 272                         arr[i].port_id = port->logical_port_id;
 273                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 274                                           EHEA_BCMC_UNTAGGED;
 275                         arr[i++].macaddr = port->mac_addr;
 276
 277                         arr[i].adh = adapter->handle;
 278                         arr[i].port_id = port->logical_port_id;
 279                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 280                                           EHEA_BCMC_VLANID_ALL;
 281                         arr[i++].macaddr = port->mac_addr;
 282                         num_registrations -= 2;
 283
 284                         list_for_each_entry(mc_entry,
 285                                             &port->mc_list->list, list) {
 286                                 if (num_registrations == 0)
 287                                         goto out_update;
 288
 289                                 arr[i].adh = adapter->handle;
 290                                 arr[i].port_id = port->logical_port_id;
 291                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 292                                                   EHEA_BCMC_UNTAGGED;
 293                                 if (mc_entry->macaddr == 0)
 294                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 295                                 arr[i++].macaddr = mc_entry->macaddr;
 296
 297                                 arr[i].adh = adapter->handle;
 298                                 arr[i].port_id = port->logical_port_id;
 299                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 300                                                   EHEA_BCMC_VLANID_ALL;
 301                                 if (mc_entry->macaddr == 0)
 302                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 303                                 arr[i++].macaddr = mc_entry->macaddr;
 304                                 num_registrations -= 2;
 305                         }
 306                 }
 307         }
 308
 309 out_update:
 310         kfree(ehea_bcmc_regs.arr);
 311         ehea_bcmc_regs.arr = arr;
 312         ehea_bcmc_regs.num_entries = i;
 313 out:
 314         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 315 }
 316
 317 static void ehea_get_stats64(struct net_device *dev,
 318                              struct rtnl_link_stats64 *stats)
 319 {
 320         struct ehea_port *port = netdev_priv(dev);
 321         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 322         int i;
 323
 324         for (i = 0; i < port->num_def_qps; i++) {
 325                 rx_packets += port->port_res[i].rx_packets;
 326                 rx_bytes   += port->port_res[i].rx_bytes;
 327         }
 328
 329         for (i = 0; i < port->num_def_qps; i++) {
 330                 tx_packets += port->port_res[i].tx_packets;
 331                 tx_bytes   += port->port_res[i].tx_bytes;
 332         }
 333
 334         stats->tx_packets = tx_packets;
 335         stats->rx_bytes = rx_bytes;
 336         stats->tx_bytes = tx_bytes;
 337         stats->rx_packets = rx_packets;
 338
 339         stats->multicast = port->stats.multicast;
 340         stats->rx_errors = port->stats.rx_errors;
 341 }
 342
 343 static void ehea_update_stats(struct work_struct *work)
 344 {
 345         struct ehea_port *port =
 346                 container_of(work, struct ehea_port, stats_work.work);
 347         struct net_device *dev = port->netdev;
 348         struct rtnl_link_stats64 *stats = &port->stats;
 349         struct hcp_ehea_port_cb2 *cb2;
 350         u64 hret;
 351
 352         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 353         if (!cb2) {
 354                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 355                 goto resched;
 356         }
 357
 358         hret = ehea_h_query_ehea_port(port->adapter->handle,
 359                                       port->logical_port_id,
 360                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 361         if (hret != H_SUCCESS) {
 362                 netdev_err(dev, "query_ehea_port failed\n");
 363                 goto out_herr;
 364         }
 365
 366         if (netif_msg_hw(port))
 367                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 368
 369         stats->multicast = cb2->rxmcp;
 370         stats->rx_errors = cb2->rxuerr;
 371
 372 out_herr:
 373         free_page((unsigned long)cb2);
 374 resched:
 375         schedule_delayed_work(&port->stats_work,
 376                               round_jiffies_relative(msecs_to_jiffies(1000)));
 377 }
 378
 379 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 380 {
 381         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 382         struct net_device *dev = pr->port->netdev;
 383         int max_index_mask = pr->rq1_skba.len - 1;
 384         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 385         int adder = 0;
 386         int i;
 387
 388         pr->rq1_skba.os_skbs = 0;
 389
 390         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 391                 if (nr_of_wqes > 0)
 392                         pr->rq1_skba.index = index;
 393                 pr->rq1_skba.os_skbs = fill_wqes;
 394                 return;
 395         }
 396
 397         for (i = 0; i < fill_wqes; i++) {
 398                 if (!skb_arr_rq1[index]) {
 399                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 400                                                               EHEA_L_PKT_SIZE);
 401                         if (!skb_arr_rq1[index]) {
 402                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 403                                 break;
 404                         }
 405                 }
 406                 index--;
 407                 index &= max_index_mask;
 408                 adder++;
 409         }
 410
 411         if (adder == 0)
 412                 return;
 413
 414         /* Ring doorbell */
 415         ehea_update_rq1a(pr->qp, adder);
 416 }
 417
 418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 419 {
 420         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 421         struct net_device *dev = pr->port->netdev;
 422         int i;
 423
 424         if (nr_rq1a > pr->rq1_skba.len) {
 425                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 426                 return;
 427         }
 428
 429         for (i = 0; i < nr_rq1a; i++) {
 430                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 431                 if (!skb_arr_rq1[i])
 432                         break;
 433         }
 434         /* Ring doorbell */
 435         ehea_update_rq1a(pr->qp, i - 1);
 436 }
 437
 438 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 439                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 440                               int num_wqes, int wqe_type, int packet_size)
 441 {
 442         struct net_device *dev = pr->port->netdev;
 443         struct ehea_qp *qp = pr->qp;
 444         struct sk_buff **skb_arr = q_skba->arr;
 445         struct ehea_rwqe *rwqe;
 446         int i, index, max_index_mask, fill_wqes;
 447         int adder = 0;
 448         int ret = 0;
 449
 450         fill_wqes = q_skba->os_skbs + num_wqes;
 451         q_skba->os_skbs = 0;
 452
 453         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 454                 q_skba->os_skbs = fill_wqes;
 455                 return ret;
 456         }
 457
 458         index = q_skba->index;
 459         max_index_mask = q_skba->len - 1;
 460         for (i = 0; i < fill_wqes; i++) {
 461                 u64 tmp_addr;
 462                 struct sk_buff *skb;
 463
 464                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 465                 if (!skb) {
 466                         q_skba->os_skbs = fill_wqes - i;
 467                         if (q_skba->os_skbs == q_skba->len - 2) {
 468                                 netdev_info(pr->port->netdev,
 469                                             "rq%i ran dry - no mem for skb\n",
 470                                             rq_nr);
 471                                 ret = -ENOMEM;
 472                         }
 473                         break;
 474                 }
 475
 476                 skb_arr[index] = skb;
 477                 tmp_addr = ehea_map_vaddr(skb->data);
 478                 if (tmp_addr == -1) {
 479                         dev_consume_skb_any(skb);
 480                         q_skba->os_skbs = fill_wqes - i;
 481                         ret = 0;
 482                         break;
 483                 }
 484
 485                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 486                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 487                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 488                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 489                 rwqe->sg_list[0].vaddr = tmp_addr;
 490                 rwqe->sg_list[0].len = packet_size;
 491                 rwqe->data_segments = 1;
 492
 493                 index++;
 494                 index &= max_index_mask;
 495                 adder++;
 496         }
 497
 498         q_skba->index = index;
 499         if (adder == 0)
 500                 goto out;
 501
 502         /* Ring doorbell */
 503         iosync();
 504         if (rq_nr == 2)
 505                 ehea_update_rq2a(pr->qp, adder);
 506         else
 507                 ehea_update_rq3a(pr->qp, adder);
 508 out:
 509         return ret;
 510 }
 511
 512
 513 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 514 {
 515         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 516                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 517                                   EHEA_RQ2_PKT_SIZE);
 518 }
 519
 520
 521 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 522 {
 523         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 524                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 525                                   EHEA_MAX_PACKET_SIZE);
 526 }
 527
 528 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 529 {
 530         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 531         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 532                 return 0;
 533         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 534             (cqe->header_length == 0))
 535                 return 0;
 536         return -EINVAL;
 537 }
 538
 539 static inline void ehea_fill_skb(struct net_device *dev,
 540                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 541                                  struct ehea_port_res *pr)
 542 {
 543         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 544
 545         skb_put(skb, length);
 546         skb->protocol = eth_type_trans(skb, dev);
 547
 548         /* The packet was not an IPV4 packet so a complemented checksum was
 549            calculated. The value is found in the Internet Checksum field. */
 550         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 551                 skb->ip_summed = CHECKSUM_COMPLETE;
 552                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 553         } else
 554                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 555
 556         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 557 }
 558
 559 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 560                                                int arr_len,
 561                                                struct ehea_cqe *cqe)
 562 {
 563         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 564         struct sk_buff *skb;
 565         void *pref;
 566         int x;
 567
 568         x = skb_index + 1;
 569         x &= (arr_len - 1);
 570
 571         pref = skb_array[x];
 572         if (pref) {
 573                 prefetchw(pref);
 574                 prefetchw(pref + EHEA_CACHE_LINE);
 575
 576                 pref = (skb_array[x]->data);
 577                 prefetch(pref);
 578                 prefetch(pref + EHEA_CACHE_LINE);
 579                 prefetch(pref + EHEA_CACHE_LINE * 2);
 580                 prefetch(pref + EHEA_CACHE_LINE * 3);
 581         }
 582
 583         skb = skb_array[skb_index];
 584         skb_array[skb_index] = NULL;
 585         return skb;
 586 }
 587
 588 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 589                                                   int arr_len, int wqe_index)
 590 {
 591         struct sk_buff *skb;
 592         void *pref;
 593         int x;
 594
 595         x = wqe_index + 1;
 596         x &= (arr_len - 1);
 597
 598         pref = skb_array[x];
 599         if (pref) {
 600                 prefetchw(pref);
 601                 prefetchw(pref + EHEA_CACHE_LINE);
 602
 603                 pref = (skb_array[x]->data);
 604                 prefetchw(pref);
 605                 prefetchw(pref + EHEA_CACHE_LINE);
 606         }
 607
 608         skb = skb_array[wqe_index];
 609         skb_array[wqe_index] = NULL;
 610         return skb;
 611 }
 612
 613 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 614                                  struct ehea_cqe *cqe, int *processed_rq2,
 615                                  int *processed_rq3)
 616 {
 617         struct sk_buff *skb;
 618
 619         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 620                 pr->p_stats.err_tcp_cksum++;
 621         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 622                 pr->p_stats.err_ip_cksum++;
 623         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 624                 pr->p_stats.err_frame_crc++;
 625
 626         if (rq == 2) {
 627                 *processed_rq2 += 1;
 628                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 629                 dev_kfree_skb(skb);
 630         } else if (rq == 3) {
 631                 *processed_rq3 += 1;
 632                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 633                 dev_kfree_skb(skb);
 634         }
 635
 636         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 637                 if (netif_msg_rx_err(pr->port)) {
 638                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 639                                pr->qp->init_attr.qp_nr);
 640                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 641                 }
 642                 ehea_schedule_port_reset(pr->port);
 643                 return 1;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static int ehea_proc_rwqes(struct net_device *dev,
 650                            struct ehea_port_res *pr,
 651                            int budget)
 652 {
 653         struct ehea_port *port = pr->port;
 654         struct ehea_qp *qp = pr->qp;
 655         struct ehea_cqe *cqe;
 656         struct sk_buff *skb;
 657         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 658         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 659         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 660         int skb_arr_rq1_len = pr->rq1_skba.len;
 661         int skb_arr_rq2_len = pr->rq2_skba.len;
 662         int skb_arr_rq3_len = pr->rq3_skba.len;
 663         int processed, processed_rq1, processed_rq2, processed_rq3;
 664         u64 processed_bytes = 0;
 665         int wqe_index, last_wqe_index, rq, port_reset;
 666
 667         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 668         last_wqe_index = 0;
 669
 670         cqe = ehea_poll_rq1(qp, &wqe_index);
 671         while ((processed < budget) && cqe) {
 672                 ehea_inc_rq1(qp);
 673                 processed_rq1++;
 674                 processed++;
 675                 if (netif_msg_rx_status(port))
 676                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 677
 678                 last_wqe_index = wqe_index;
 679                 rmb();
 680                 if (!ehea_check_cqe(cqe, &rq)) {
 681                         if (rq == 1) {
 682                                 /* LL RQ1 */
 683                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 684                                                           skb_arr_rq1_len,
 685                                                           wqe_index);
 686                                 if (unlikely(!skb)) {
 687                                         netif_info(port, rx_err, dev,
 688                                                   "LL rq1: skb=NULL\n");
 689
 690                                         skb = netdev_alloc_skb(dev,
 691                                                                EHEA_L_PKT_SIZE);
 692                                         if (!skb)
 693                                                 break;
 694                                 }
 695                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 696                                                  cqe->num_bytes_transfered - 4);
 697                                 ehea_fill_skb(dev, skb, cqe, pr);
 698                         } else if (rq == 2) {
 699                                 /* RQ2 */
 700                                 skb = get_skb_by_index(skb_arr_rq2,
 701                                                        skb_arr_rq2_len, cqe);
 702                                 if (unlikely(!skb)) {
 703                                         netif_err(port, rx_err, dev,
 704                                                   "rq2: skb=NULL\n");
 705                                         break;
 706                                 }
 707                                 ehea_fill_skb(dev, skb, cqe, pr);
 708                                 processed_rq2++;
 709                         } else {
 710                                 /* RQ3 */
 711                                 skb = get_skb_by_index(skb_arr_rq3,
 712                                                        skb_arr_rq3_len, cqe);
 713                                 if (unlikely(!skb)) {
 714                                         netif_err(port, rx_err, dev,
 715                                                   "rq3: skb=NULL\n");
 716                                         break;
 717                                 }
 718                                 ehea_fill_skb(dev, skb, cqe, pr);
 719                                 processed_rq3++;
 720                         }
 721
 722                         processed_bytes += skb->len;
 723
 724                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 725                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 726                                                        cqe->vlan_tag);
 727
 728                         napi_gro_receive(&pr->napi, skb);
 729                 } else {
 730                         pr->p_stats.poll_receive_errors++;
 731                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 732                                                            &processed_rq2,
 733                                                            &processed_rq3);
 734                         if (port_reset)
 735                                 break;
 736                 }
 737                 cqe = ehea_poll_rq1(qp, &wqe_index);
 738         }
 739
 740         pr->rx_packets += processed;
 741         pr->rx_bytes += processed_bytes;
 742
 743         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 744         ehea_refill_rq2(pr, processed_rq2);
 745         ehea_refill_rq3(pr, processed_rq3);
 746
 747         return processed;
 748 }
 749
 750 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 751
 752 static void reset_sq_restart_flag(struct ehea_port *port)
 753 {
 754         int i;
 755
 756         for (i = 0; i < port->num_def_qps; i++) {
 757                 struct ehea_port_res *pr = &port->port_res[i];
 758                 pr->sq_restart_flag = 0;
 759         }
 760         wake_up(&port->restart_wq);
 761 }
 762
 763 static void check_sqs(struct ehea_port *port)
 764 {
 765         struct ehea_swqe *swqe;
 766         int swqe_index;
 767         int i;
 768
 769         for (i = 0; i < port->num_def_qps; i++) {
 770                 struct ehea_port_res *pr = &port->port_res[i];
 771                 int ret;
 772                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 773                 memset(swqe, 0, SWQE_HEADER_SIZE);
 774                 atomic_dec(&pr->swqe_avail);
 775
 776                 swqe->tx_control |= EHEA_SWQE_PURGE;
 777                 swqe->wr_id = SWQE_RESTART_CHECK;
 778                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 779                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 780                 swqe->immediate_data_length = 80;
 781
 782                 ehea_post_swqe(pr->qp, swqe);
 783
 784                 ret = wait_event_timeout(port->restart_wq,
 785                                          pr->sq_restart_flag == 0,
 786                                          msecs_to_jiffies(100));
 787
 788                 if (!ret) {
 789                         pr_err("HW/SW queues out of sync\n");
 790                         ehea_schedule_port_reset(pr->port);
 791                         return;
 792                 }
 793         }
 794 }
 795
 796
 797 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 798 {
 799         struct sk_buff *skb;
 800         struct ehea_cq *send_cq = pr->send_cq;
 801         struct ehea_cqe *cqe;
 802         int quota = my_quota;
 803         int cqe_counter = 0;
 804         int swqe_av = 0;
 805         int index;
 806         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 807                                                 pr - &pr->port->port_res[0]);
 808
 809         cqe = ehea_poll_cq(send_cq);
 810         while (cqe && (quota > 0)) {
 811                 ehea_inc_cq(send_cq);
 812
 813                 cqe_counter++;
 814                 rmb();
 815
 816                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 817                         pr->sq_restart_flag = 1;
 818                         swqe_av++;
 819                         break;
 820                 }
 821
 822                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 823                         pr_err("Bad send completion status=0x%04X\n",
 824                                cqe->status);
 825
 826                         if (netif_msg_tx_err(pr->port))
 827                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 828
 829                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 830                                 pr_err("Resetting port\n");
 831                                 ehea_schedule_port_reset(pr->port);
 832                                 break;
 833                         }
 834                 }
 835
 836                 if (netif_msg_tx_done(pr->port))
 837                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 838
 839                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 840                            == EHEA_SWQE2_TYPE)) {
 841
 842                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 843                         skb = pr->sq_skba.arr[index];
 844                         dev_consume_skb_any(skb);
 845                         pr->sq_skba.arr[index] = NULL;
 846                 }
 847
 848                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 849                 quota--;
 850
 851                 cqe = ehea_poll_cq(send_cq);
 852         }
 853
 854         ehea_update_feca(send_cq, cqe_counter);
 855         atomic_add(swqe_av, &pr->swqe_avail);
 856
 857         if (unlikely(netif_tx_queue_stopped(txq) &&
 858                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 859                 __netif_tx_lock(txq, smp_processor_id());
 860                 if (netif_tx_queue_stopped(txq) &&
 861                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 862                         netif_tx_wake_queue(txq);
 863                 __netif_tx_unlock(txq);
 864         }
 865
 866         wake_up(&pr->port->swqe_avail_wq);
 867
 868         return cqe;
 869 }
 870
 871 #define EHEA_POLL_MAX_CQES 65535
 872
 873 static int ehea_poll(struct napi_struct *napi, int budget)
 874 {
 875         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 876                                                 napi);
 877         struct net_device *dev = pr->port->netdev;
 878         struct ehea_cqe *cqe;
 879         struct ehea_cqe *cqe_skb = NULL;
 880         int wqe_index;
 881         int rx = 0;
 882
 883         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 884         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 885
 886         while (rx != budget) {
 887                 napi_complete(napi);
 888                 ehea_reset_cq_ep(pr->recv_cq);
 889                 ehea_reset_cq_ep(pr->send_cq);
 890                 ehea_reset_cq_n1(pr->recv_cq);
 891                 ehea_reset_cq_n1(pr->send_cq);
 892                 rmb();
 893                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 894                 cqe_skb = ehea_poll_cq(pr->send_cq);
 895
 896                 if (!cqe && !cqe_skb)
 897                         return rx;
 898
 899                 if (!napi_reschedule(napi))
 900                         return rx;
 901
 902                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 903                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 904         }
 905
 906         return rx;
 907 }
 908
 909 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 910 {
 911         struct ehea_port_res *pr = param;
 912
 913         napi_schedule(&pr->napi);
 914
 915         return IRQ_HANDLED;
 916 }
 917
 918 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 919 {
 920         struct ehea_port *port = param;
 921         struct ehea_eqe *eqe;
 922         struct ehea_qp *qp;
 923         u32 qp_token;
 924         u64 resource_type, aer, aerr;
 925         int reset_port = 0;
 926
 927         eqe = ehea_poll_eq(port->qp_eq);
 928
 929         while (eqe) {
 930                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 931                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 932                        eqe->entry, qp_token);
 933
 934                 qp = port->port_res[qp_token].qp;
 935
 936                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 937                                                 &aer, &aerr);
 938
 939                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 940                         if ((aer & EHEA_AER_RESET_MASK) ||
 941                             (aerr & EHEA_AERR_RESET_MASK))
 942                                  reset_port = 1;
 943                 } else
 944                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 945
 946                 eqe = ehea_poll_eq(port->qp_eq);
 947         }
 948
 949         if (reset_port) {
 950                 pr_err("Resetting port\n");
 951                 ehea_schedule_port_reset(port);
 952         }
 953
 954         return IRQ_HANDLED;
 955 }
 956
 957 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 958                                        int logical_port)
 959 {
 960         int i;
 961
 962         for (i = 0; i < EHEA_MAX_PORTS; i++)
 963                 if (adapter->port[i])
 964                         if (adapter->port[i]->logical_port_id == logical_port)
 965                                 return adapter->port[i];
 966         return NULL;
 967 }
 968
 969 int ehea_sense_port_attr(struct ehea_port *port)
 970 {
 971         int ret;
 972         u64 hret;
 973         struct hcp_ehea_port_cb0 *cb0;
 974
 975         /* may be called via ehea_neq_tasklet() */
 976         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 977         if (!cb0) {
 978                 pr_err("no mem for cb0\n");
 979                 ret = -ENOMEM;
 980                 goto out;
 981         }
 982
 983         hret = ehea_h_query_ehea_port(port->adapter->handle,
 984                                       port->logical_port_id, H_PORT_CB0,
 985                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 986                                       cb0);
 987         if (hret != H_SUCCESS) {
 988                 ret = -EIO;
 989                 goto out_free;
 990         }
 991
 992         /* MAC address */
 993         port->mac_addr = cb0->port_mac_addr << 16;
 994
 995         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 996                 ret = -EADDRNOTAVAIL;
 997                 goto out_free;
 998         }
 999
1000         /* Port speed */
1001         switch (cb0->port_speed) {
1002         case H_SPEED_10M_H:
1003                 port->port_speed = EHEA_SPEED_10M;
1004                 port->full_duplex = 0;
1005                 break;
1006         case H_SPEED_10M_F:
1007                 port->port_speed = EHEA_SPEED_10M;
1008                 port->full_duplex = 1;
1009                 break;
1010         case H_SPEED_100M_H:
1011                 port->port_speed = EHEA_SPEED_100M;
1012                 port->full_duplex = 0;
1013                 break;
1014         case H_SPEED_100M_F:
1015                 port->port_speed = EHEA_SPEED_100M;
1016                 port->full_duplex = 1;
1017                 break;
1018         case H_SPEED_1G_F:
1019                 port->port_speed = EHEA_SPEED_1G;
1020                 port->full_duplex = 1;
1021                 break;
1022         case H_SPEED_10G_F:
1023                 port->port_speed = EHEA_SPEED_10G;
1024                 port->full_duplex = 1;
1025                 break;
1026         default:
1027                 port->port_speed = 0;
1028                 port->full_duplex = 0;
1029                 break;
1030         }
1031
1032         port->autoneg = 1;
1033         port->num_mcs = cb0->num_default_qps;
1034
1035         /* Number of default QPs */
1036         if (use_mcs)
1037                 port->num_def_qps = cb0->num_default_qps;
1038         else
1039                 port->num_def_qps = 1;
1040
1041         if (!port->num_def_qps) {
1042                 ret = -EINVAL;
1043                 goto out_free;
1044         }
1045
1046         ret = 0;
1047 out_free:
1048         if (ret || netif_msg_probe(port))
1049                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1050         free_page((unsigned long)cb0);
1051 out:
1052         return ret;
1053 }
1054
1055 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1056 {
1057         struct hcp_ehea_port_cb4 *cb4;
1058         u64 hret;
1059         int ret = 0;
1060
1061         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1062         if (!cb4) {
1063                 pr_err("no mem for cb4\n");
1064                 ret = -ENOMEM;
1065                 goto out;
1066         }
1067
1068         cb4->port_speed = port_speed;
1069
1070         netif_carrier_off(port->netdev);
1071
1072         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1073                                        port->logical_port_id,
1074                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1075         if (hret == H_SUCCESS) {
1076                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1077
1078                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1079                                               port->logical_port_id,
1080                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1081                                               cb4);
1082                 if (hret == H_SUCCESS) {
1083                         switch (cb4->port_speed) {
1084                         case H_SPEED_10M_H:
1085                                 port->port_speed = EHEA_SPEED_10M;
1086                                 port->full_duplex = 0;
1087                                 break;
1088                         case H_SPEED_10M_F:
1089                                 port->port_speed = EHEA_SPEED_10M;
1090                                 port->full_duplex = 1;
1091                                 break;
1092                         case H_SPEED_100M_H:
1093                                 port->port_speed = EHEA_SPEED_100M;
1094                                 port->full_duplex = 0;
1095                                 break;
1096                         case H_SPEED_100M_F:
1097                                 port->port_speed = EHEA_SPEED_100M;
1098                                 port->full_duplex = 1;
1099                                 break;
1100                         case H_SPEED_1G_F:
1101                                 port->port_speed = EHEA_SPEED_1G;
1102                                 port->full_duplex = 1;
1103                                 break;
1104                         case H_SPEED_10G_F:
1105                                 port->port_speed = EHEA_SPEED_10G;
1106                                 port->full_duplex = 1;
1107                                 break;
1108                         default:
1109                                 port->port_speed = 0;
1110                                 port->full_duplex = 0;
1111                                 break;
1112                         }
1113                 } else {
1114                         pr_err("Failed sensing port speed\n");
1115                         ret = -EIO;
1116                 }
1117         } else {
1118                 if (hret == H_AUTHORITY) {
1119                         pr_info("Hypervisor denied setting port speed\n");
1120                         ret = -EPERM;
1121                 } else {
1122                         ret = -EIO;
1123                         pr_err("Failed setting port speed\n");
1124                 }
1125         }
1126         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1127                 netif_carrier_on(port->netdev);
1128
1129         free_page((unsigned long)cb4);
1130 out:
1131         return ret;
1132 }
1133
1134 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1135 {
1136         int ret;
1137         u8 ec;
1138         u8 portnum;
1139         struct ehea_port *port;
1140         struct net_device *dev;
1141
1142         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1143         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1144         port = ehea_get_port(adapter, portnum);
1145         if (!port) {
1146                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1147                 return;
1148         }
1149         dev = port->netdev;
1150
1151         switch (ec) {
1152         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1153
1154                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1155                         if (!netif_carrier_ok(dev)) {
1156                                 ret = ehea_sense_port_attr(port);
1157                                 if (ret) {
1158                                         netdev_err(dev, "failed resensing port attributes\n");
1159                                         break;
1160                                 }
1161
1162                                 netif_info(port, link, dev,
1163                                            "Logical port up: %dMbps %s Duplex\n",
1164                                            port->port_speed,
1165                                            port->full_duplex == 1 ?
1166                                            "Full" : "Half");
1167
1168                                 netif_carrier_on(dev);
1169                                 netif_wake_queue(dev);
1170                         }
1171                 } else
1172                         if (netif_carrier_ok(dev)) {
1173                                 netif_info(port, link, dev,
1174                                            "Logical port down\n");
1175                                 netif_carrier_off(dev);
1176                                 netif_tx_disable(dev);
1177                         }
1178
1179                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1180                         port->phy_link = EHEA_PHY_LINK_UP;
1181                         netif_info(port, link, dev,
1182                                    "Physical port up\n");
1183                         if (prop_carrier_state)
1184                                 netif_carrier_on(dev);
1185                 } else {
1186                         port->phy_link = EHEA_PHY_LINK_DOWN;
1187                         netif_info(port, link, dev,
1188                                    "Physical port down\n");
1189                         if (prop_carrier_state)
1190                                 netif_carrier_off(dev);
1191                 }
1192
1193                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1194                         netdev_info(dev,
1195                                     "External switch port is primary port\n");
1196                 else
1197                         netdev_info(dev,
1198                                     "External switch port is backup port\n");
1199
1200                 break;
1201         case EHEA_EC_ADAPTER_MALFUNC:
1202                 netdev_err(dev, "Adapter malfunction\n");
1203                 break;
1204         case EHEA_EC_PORT_MALFUNC:
1205                 netdev_info(dev, "Port malfunction\n");
1206                 netif_carrier_off(dev);
1207                 netif_tx_disable(dev);
1208                 break;
1209         default:
1210                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1211                 break;
1212         }
1213 }
1214
1215 static void ehea_neq_tasklet(unsigned long data)
1216 {
1217         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1218         struct ehea_eqe *eqe;
1219         u64 event_mask;
1220
1221         eqe = ehea_poll_eq(adapter->neq);
1222         pr_debug("eqe=%p\n", eqe);
1223
1224         while (eqe) {
1225                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1226                 ehea_parse_eqe(adapter, eqe->entry);
1227                 eqe = ehea_poll_eq(adapter->neq);
1228                 pr_debug("next eqe=%p\n", eqe);
1229         }
1230
1231         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1232                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1233                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1234
1235         ehea_h_reset_events(adapter->handle,
1236                             adapter->neq->fw_handle, event_mask);
1237 }
1238
1239 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1240 {
1241         struct ehea_adapter *adapter = param;
1242         tasklet_hi_schedule(&adapter->neq_tasklet);
1243         return IRQ_HANDLED;
1244 }
1245
1246
1247 static int ehea_fill_port_res(struct ehea_port_res *pr)
1248 {
1249         int ret;
1250         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1251
1252         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1253
1254         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1255
1256         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1257
1258         return ret;
1259 }
1260
1261 static int ehea_reg_interrupts(struct net_device *dev)
1262 {
1263         struct ehea_port *port = netdev_priv(dev);
1264         struct ehea_port_res *pr;
1265         int i, ret;
1266
1267
1268         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1269                  dev->name);
1270
1271         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1272                                   ehea_qp_aff_irq_handler,
1273                                   0, port->int_aff_name, port);
1274         if (ret) {
1275                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1276                            port->qp_eq->attr.ist1);
1277                 goto out_free_qpeq;
1278         }
1279
1280         netif_info(port, ifup, dev,
1281                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1282                    port->qp_eq->attr.ist1);
1283
1284
1285         for (i = 0; i < port->num_def_qps; i++) {
1286                 pr = &port->port_res[i];
1287                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1288                          "%s-queue%d", dev->name, i);
1289                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1290                                           ehea_recv_irq_handler,
1291                                           0, pr->int_send_name, pr);
1292                 if (ret) {
1293                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1294                                    i, pr->eq->attr.ist1);
1295                         goto out_free_req;
1296                 }
1297                 netif_info(port, ifup, dev,
1298                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1299                            pr->eq->attr.ist1, i);
1300         }
1301 out:
1302         return ret;
1303
1304
1305 out_free_req:
1306         while (--i >= 0) {
1307                 u32 ist = port->port_res[i].eq->attr.ist1;
1308                 ibmebus_free_irq(ist, &port->port_res[i]);
1309         }
1310
1311 out_free_qpeq:
1312         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1313         i = port->num_def_qps;
1314
1315         goto out;
1316
1317 }
1318
1319 static void ehea_free_interrupts(struct net_device *dev)
1320 {
1321         struct ehea_port *port = netdev_priv(dev);
1322         struct ehea_port_res *pr;
1323         int i;
1324
1325         /* send */
1326
1327         for (i = 0; i < port->num_def_qps; i++) {
1328                 pr = &port->port_res[i];
1329                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1330                 netif_info(port, intr, dev,
1331                            "free send irq for res %d with handle 0x%X\n",
1332                            i, pr->eq->attr.ist1);
1333         }
1334
1335         /* associated events */
1336         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1337         netif_info(port, intr, dev,
1338                    "associated event interrupt for handle 0x%X freed\n",
1339                    port->qp_eq->attr.ist1);
1340 }
1341
1342 static int ehea_configure_port(struct ehea_port *port)
1343 {
1344         int ret, i;
1345         u64 hret, mask;
1346         struct hcp_ehea_port_cb0 *cb0;
1347
1348         ret = -ENOMEM;
1349         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1350         if (!cb0)
1351                 goto out;
1352
1353         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1354                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1355                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1356                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1357                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1358                                       PXLY_RC_VLAN_FILTER)
1359                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1360
1361         for (i = 0; i < port->num_mcs; i++)
1362                 if (use_mcs)
1363                         cb0->default_qpn_arr[i] =
1364                                 port->port_res[i].qp->init_attr.qp_nr;
1365                 else
1366                         cb0->default_qpn_arr[i] =
1367                                 port->port_res[0].qp->init_attr.qp_nr;
1368
1369         if (netif_msg_ifup(port))
1370                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1371
1372         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1373              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1374
1375         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1376                                        port->logical_port_id,
1377                                        H_PORT_CB0, mask, cb0);
1378         ret = -EIO;
1379         if (hret != H_SUCCESS)
1380                 goto out_free;
1381
1382         ret = 0;
1383
1384 out_free:
1385         free_page((unsigned long)cb0);
1386 out:
1387         return ret;
1388 }
1389
1390 static int ehea_gen_smrs(struct ehea_port_res *pr)
1391 {
1392         int ret;
1393         struct ehea_adapter *adapter = pr->port->adapter;
1394
1395         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1396         if (ret)
1397                 goto out;
1398
1399         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1400         if (ret)
1401                 goto out_free;
1402
1403         return 0;
1404
1405 out_free:
1406         ehea_rem_mr(&pr->send_mr);
1407 out:
1408         pr_err("Generating SMRS failed\n");
1409         return -EIO;
1410 }
1411
1412 static int ehea_rem_smrs(struct ehea_port_res *pr)
1413 {
1414         if ((ehea_rem_mr(&pr->send_mr)) ||
1415             (ehea_rem_mr(&pr->recv_mr)))
1416                 return -EIO;
1417         else
1418                 return 0;
1419 }
1420
1421 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1422 {
1423         int arr_size = sizeof(void *) * max_q_entries;
1424
1425         q_skba->arr = vzalloc(arr_size);
1426         if (!q_skba->arr)
1427                 return -ENOMEM;
1428
1429         q_skba->len = max_q_entries;
1430         q_skba->index = 0;
1431         q_skba->os_skbs = 0;
1432
1433         return 0;
1434 }
1435
1436 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1437                               struct port_res_cfg *pr_cfg, int queue_token)
1438 {
1439         struct ehea_adapter *adapter = port->adapter;
1440         enum ehea_eq_type eq_type = EHEA_EQ;
1441         struct ehea_qp_init_attr *init_attr = NULL;
1442         int ret = -EIO;
1443         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1444
1445         tx_bytes = pr->tx_bytes;
1446         tx_packets = pr->tx_packets;
1447         rx_bytes = pr->rx_bytes;
1448         rx_packets = pr->rx_packets;
1449
1450         memset(pr, 0, sizeof(struct ehea_port_res));
1451
1452         pr->tx_bytes = tx_bytes;
1453         pr->tx_packets = tx_packets;
1454         pr->rx_bytes = rx_bytes;
1455         pr->rx_packets = rx_packets;
1456
1457         pr->port = port;
1458
1459         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1460         if (!pr->eq) {
1461                 pr_err("create_eq failed (eq)\n");
1462                 goto out_free;
1463         }
1464
1465         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1466                                      pr->eq->fw_handle,
1467                                      port->logical_port_id);
1468         if (!pr->recv_cq) {
1469                 pr_err("create_cq failed (cq_recv)\n");
1470                 goto out_free;
1471         }
1472
1473         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1474                                      pr->eq->fw_handle,
1475                                      port->logical_port_id);
1476         if (!pr->send_cq) {
1477                 pr_err("create_cq failed (cq_send)\n");
1478                 goto out_free;
1479         }
1480
1481         if (netif_msg_ifup(port))
1482                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1483                         pr->send_cq->attr.act_nr_of_cqes,
1484                         pr->recv_cq->attr.act_nr_of_cqes);
1485
1486         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1487         if (!init_attr) {
1488                 ret = -ENOMEM;
1489                 pr_err("no mem for ehea_qp_init_attr\n");
1490                 goto out_free;
1491         }
1492
1493         init_attr->low_lat_rq1 = 1;
1494         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1495         init_attr->rq_count = 3;
1496         init_attr->qp_token = queue_token;
1497         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1498         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1499         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1500         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1501         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1502         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1503         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1504         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1505         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1506         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1507         init_attr->port_nr = port->logical_port_id;
1508         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1509         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1510         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1511
1512         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1513         if (!pr->qp) {
1514                 pr_err("create_qp failed\n");
1515                 ret = -EIO;
1516                 goto out_free;
1517         }
1518
1519         if (netif_msg_ifup(port))
1520                 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",
1521                         init_attr->qp_nr,
1522                         init_attr->act_nr_send_wqes,
1523                         init_attr->act_nr_rwqes_rq1,
1524                         init_attr->act_nr_rwqes_rq2,
1525                         init_attr->act_nr_rwqes_rq3);
1526
1527         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1528
1529         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1530         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1531         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1532         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1533         if (ret)
1534                 goto out_free;
1535
1536         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1537         if (ehea_gen_smrs(pr) != 0) {
1538                 ret = -EIO;
1539                 goto out_free;
1540         }
1541
1542         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1543
1544         kfree(init_attr);
1545
1546         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1547
1548         ret = 0;
1549         goto out;
1550
1551 out_free:
1552         kfree(init_attr);
1553         vfree(pr->sq_skba.arr);
1554         vfree(pr->rq1_skba.arr);
1555         vfree(pr->rq2_skba.arr);
1556         vfree(pr->rq3_skba.arr);
1557         ehea_destroy_qp(pr->qp);
1558         ehea_destroy_cq(pr->send_cq);
1559         ehea_destroy_cq(pr->recv_cq);
1560         ehea_destroy_eq(pr->eq);
1561 out:
1562         return ret;
1563 }
1564
1565 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1566 {
1567         int ret, i;
1568
1569         if (pr->qp)
1570                 netif_napi_del(&pr->napi);
1571
1572         ret = ehea_destroy_qp(pr->qp);
1573
1574         if (!ret) {
1575                 ehea_destroy_cq(pr->send_cq);
1576                 ehea_destroy_cq(pr->recv_cq);
1577                 ehea_destroy_eq(pr->eq);
1578
1579                 for (i = 0; i < pr->rq1_skba.len; i++)
1580                         if (pr->rq1_skba.arr[i])
1581                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1582
1583                 for (i = 0; i < pr->rq2_skba.len; i++)
1584                         if (pr->rq2_skba.arr[i])
1585                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1586
1587                 for (i = 0; i < pr->rq3_skba.len; i++)
1588                         if (pr->rq3_skba.arr[i])
1589                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1590
1591                 for (i = 0; i < pr->sq_skba.len; i++)
1592                         if (pr->sq_skba.arr[i])
1593                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1594
1595                 vfree(pr->rq1_skba.arr);
1596                 vfree(pr->rq2_skba.arr);
1597                 vfree(pr->rq3_skba.arr);
1598                 vfree(pr->sq_skba.arr);
1599                 ret = ehea_rem_smrs(pr);
1600         }
1601         return ret;
1602 }
1603
1604 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1605                                   u32 lkey)
1606 {
1607         int skb_data_size = skb_headlen(skb);
1608         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1609         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1610         unsigned int immediate_len = SWQE2_MAX_IMM;
1611
1612         swqe->descriptors = 0;
1613
1614         if (skb_is_gso(skb)) {
1615                 swqe->tx_control |= EHEA_SWQE_TSO;
1616                 swqe->mss = skb_shinfo(skb)->gso_size;
1617                 /*
1618                  * For TSO packets we only copy the headers into the
1619                  * immediate area.
1620                  */
1621                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1622         }
1623
1624         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1625                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1626                 swqe->immediate_data_length = immediate_len;
1627
1628                 if (skb_data_size > immediate_len) {
1629                         sg1entry->l_key = lkey;
1630                         sg1entry->len = skb_data_size - immediate_len;
1631                         sg1entry->vaddr =
1632                                 ehea_map_vaddr(skb->data + immediate_len);
1633                         swqe->descriptors++;
1634                 }
1635         } else {
1636                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1637                 swqe->immediate_data_length = skb_data_size;
1638         }
1639 }
1640
1641 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1642                                     struct ehea_swqe *swqe, u32 lkey)
1643 {
1644         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1645         skb_frag_t *frag;
1646         int nfrags, sg1entry_contains_frag_data, i;
1647
1648         nfrags = skb_shinfo(skb)->nr_frags;
1649         sg1entry = &swqe->u.immdata_desc.sg_entry;
1650         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1651         sg1entry_contains_frag_data = 0;
1652
1653         write_swqe2_immediate(skb, swqe, lkey);
1654
1655         /* write descriptors */
1656         if (nfrags > 0) {
1657                 if (swqe->descriptors == 0) {
1658                         /* sg1entry not yet used */
1659                         frag = &skb_shinfo(skb)->frags[0];
1660
1661                         /* copy sg1entry data */
1662                         sg1entry->l_key = lkey;
1663                         sg1entry->len = skb_frag_size(frag);
1664                         sg1entry->vaddr =
1665                                 ehea_map_vaddr(skb_frag_address(frag));
1666                         swqe->descriptors++;
1667                         sg1entry_contains_frag_data = 1;
1668                 }
1669
1670                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1671
1672                         frag = &skb_shinfo(skb)->frags[i];
1673                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1674
1675                         sgentry->l_key = lkey;
1676                         sgentry->len = skb_frag_size(frag);
1677                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1678                         swqe->descriptors++;
1679                 }
1680         }
1681 }
1682
1683 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1684 {
1685         int ret = 0;
1686         u64 hret;
1687         u8 reg_type;
1688
1689         /* De/Register untagged packets */
1690         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1691         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1692                                      port->logical_port_id,
1693                                      reg_type, port->mac_addr, 0, hcallid);
1694         if (hret != H_SUCCESS) {
1695                 pr_err("%sregistering bc address failed (tagged)\n",
1696                        hcallid == H_REG_BCMC ? "" : "de");
1697                 ret = -EIO;
1698                 goto out_herr;
1699         }
1700
1701         /* De/Register VLAN packets */
1702         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1703         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1704                                      port->logical_port_id,
1705                                      reg_type, port->mac_addr, 0, hcallid);
1706         if (hret != H_SUCCESS) {
1707                 pr_err("%sregistering bc address failed (vlan)\n",
1708                        hcallid == H_REG_BCMC ? "" : "de");
1709                 ret = -EIO;
1710         }
1711 out_herr:
1712         return ret;
1713 }
1714
1715 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1716 {
1717         struct ehea_port *port = netdev_priv(dev);
1718         struct sockaddr *mac_addr = sa;
1719         struct hcp_ehea_port_cb0 *cb0;
1720         int ret;
1721         u64 hret;
1722
1723         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1724                 ret = -EADDRNOTAVAIL;
1725                 goto out;
1726         }
1727
1728         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1729         if (!cb0) {
1730                 pr_err("no mem for cb0\n");
1731                 ret = -ENOMEM;
1732                 goto out;
1733         }
1734
1735         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1736
1737         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1738
1739         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1740                                        port->logical_port_id, H_PORT_CB0,
1741                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1742         if (hret != H_SUCCESS) {
1743                 ret = -EIO;
1744                 goto out_free;
1745         }
1746
1747         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1748
1749         /* Deregister old MAC in pHYP */
1750         if (port->state == EHEA_PORT_UP) {
1751                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1752                 if (ret)
1753                         goto out_upregs;
1754         }
1755
1756         port->mac_addr = cb0->port_mac_addr << 16;
1757
1758         /* Register new MAC in pHYP */
1759         if (port->state == EHEA_PORT_UP) {
1760                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1761                 if (ret)
1762                         goto out_upregs;
1763         }
1764
1765         ret = 0;
1766
1767 out_upregs:
1768         ehea_update_bcmc_registrations();
1769 out_free:
1770         free_page((unsigned long)cb0);
1771 out:
1772         return ret;
1773 }
1774
1775 static void ehea_promiscuous_error(u64 hret, int enable)
1776 {
1777         if (hret == H_AUTHORITY)
1778                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1779                         enable == 1 ? "en" : "dis");
1780         else
1781                 pr_err("failed %sabling promiscuous mode\n",
1782                        enable == 1 ? "en" : "dis");
1783 }
1784
1785 static void ehea_promiscuous(struct net_device *dev, int enable)
1786 {
1787         struct ehea_port *port = netdev_priv(dev);
1788         struct hcp_ehea_port_cb7 *cb7;
1789         u64 hret;
1790
1791         if (enable == port->promisc)
1792                 return;
1793
1794         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1795         if (!cb7) {
1796                 pr_err("no mem for cb7\n");
1797                 goto out;
1798         }
1799
1800         /* Modify Pxs_DUCQPN in CB7 */
1801         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1802
1803         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1804                                        port->logical_port_id,
1805                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1806         if (hret) {
1807                 ehea_promiscuous_error(hret, enable);
1808                 goto out;
1809         }
1810
1811         port->promisc = enable;
1812 out:
1813         free_page((unsigned long)cb7);
1814 }
1815
1816 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1817                                      u32 hcallid)
1818 {
1819         u64 hret;
1820         u8 reg_type;
1821
1822         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1823         if (mc_mac_addr == 0)
1824                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1825
1826         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1827                                      port->logical_port_id,
1828                                      reg_type, mc_mac_addr, 0, hcallid);
1829         if (hret)
1830                 goto out;
1831
1832         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1833         if (mc_mac_addr == 0)
1834                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1835
1836         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1837                                      port->logical_port_id,
1838                                      reg_type, mc_mac_addr, 0, hcallid);
1839 out:
1840         return hret;
1841 }
1842
1843 static int ehea_drop_multicast_list(struct net_device *dev)
1844 {
1845         struct ehea_port *port = netdev_priv(dev);
1846         struct ehea_mc_list *mc_entry = port->mc_list;
1847         struct list_head *pos;
1848         struct list_head *temp;
1849         int ret = 0;
1850         u64 hret;
1851
1852         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1853                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1854
1855                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1856                                                  H_DEREG_BCMC);
1857                 if (hret) {
1858                         pr_err("failed deregistering mcast MAC\n");
1859                         ret = -EIO;
1860                 }
1861
1862                 list_del(pos);
1863                 kfree(mc_entry);
1864         }
1865         return ret;
1866 }
1867
1868 static void ehea_allmulti(struct net_device *dev, int enable)
1869 {
1870         struct ehea_port *port = netdev_priv(dev);
1871         u64 hret;
1872
1873         if (!port->allmulti) {
1874                 if (enable) {
1875                         /* Enable ALLMULTI */
1876                         ehea_drop_multicast_list(dev);
1877                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1878                         if (!hret)
1879                                 port->allmulti = 1;
1880                         else
1881                                 netdev_err(dev,
1882                                            "failed enabling IFF_ALLMULTI\n");
1883                 }
1884         } else {
1885                 if (!enable) {
1886                         /* Disable ALLMULTI */
1887                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1888                         if (!hret)
1889                                 port->allmulti = 0;
1890                         else
1891                                 netdev_err(dev,
1892                                            "failed disabling IFF_ALLMULTI\n");
1893                 }
1894         }
1895 }
1896
1897 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1898 {
1899         struct ehea_mc_list *ehea_mcl_entry;
1900         u64 hret;
1901
1902         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1903         if (!ehea_mcl_entry)
1904                 return;
1905
1906         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1907
1908         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1909
1910         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1911                                          H_REG_BCMC);
1912         if (!hret)
1913                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1914         else {
1915                 pr_err("failed registering mcast MAC\n");
1916                 kfree(ehea_mcl_entry);
1917         }
1918 }
1919
1920 static void ehea_set_multicast_list(struct net_device *dev)
1921 {
1922         struct ehea_port *port = netdev_priv(dev);
1923         struct netdev_hw_addr *ha;
1924         int ret;
1925
1926         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1927
1928         if (dev->flags & IFF_ALLMULTI) {
1929                 ehea_allmulti(dev, 1);
1930                 goto out;
1931         }
1932         ehea_allmulti(dev, 0);
1933
1934         if (!netdev_mc_empty(dev)) {
1935                 ret = ehea_drop_multicast_list(dev);
1936                 if (ret) {
1937                         /* Dropping the current multicast list failed.
1938                          * Enabling ALL_MULTI is the best we can do.
1939                          */
1940                         ehea_allmulti(dev, 1);
1941                 }
1942
1943                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1944                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1945                                 port->adapter->max_mc_mac);
1946                         goto out;
1947                 }
1948
1949                 netdev_for_each_mc_addr(ha, dev)
1950                         ehea_add_multicast_entry(port, ha->addr);
1951
1952         }
1953 out:
1954         ehea_update_bcmc_registrations();
1955 }
1956
1957 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1958 {
1959         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1960
1961         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1962                 return;
1963
1964         if (skb->ip_summed == CHECKSUM_PARTIAL)
1965                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1966
1967         swqe->ip_start = skb_network_offset(skb);
1968         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1969
1970         switch (ip_hdr(skb)->protocol) {
1971         case IPPROTO_UDP:
1972                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1973                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1974
1975                 swqe->tcp_offset = swqe->ip_end + 1 +
1976                                    offsetof(struct udphdr, check);
1977                 break;
1978
1979         case IPPROTO_TCP:
1980                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1981                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1982
1983                 swqe->tcp_offset = swqe->ip_end + 1 +
1984                                    offsetof(struct tcphdr, check);
1985                 break;
1986         }
1987 }
1988
1989 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1990                        struct ehea_swqe *swqe, u32 lkey)
1991 {
1992         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1993
1994         xmit_common(skb, swqe);
1995
1996         write_swqe2_data(skb, dev, swqe, lkey);
1997 }
1998
1999 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2000                        struct ehea_swqe *swqe)
2001 {
2002         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2003
2004         xmit_common(skb, swqe);
2005
2006         if (!skb->data_len)
2007                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2008         else
2009                 skb_copy_bits(skb, 0, imm_data, skb->len);
2010
2011         swqe->immediate_data_length = skb->len;
2012         dev_consume_skb_any(skb);
2013 }
2014
2015 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2016 {
2017         struct ehea_port *port = netdev_priv(dev);
2018         struct ehea_swqe *swqe;
2019         u32 lkey;
2020         int swqe_index;
2021         struct ehea_port_res *pr;
2022         struct netdev_queue *txq;
2023
2024         pr = &port->port_res[skb_get_queue_mapping(skb)];
2025         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2026
2027         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2028         memset(swqe, 0, SWQE_HEADER_SIZE);
2029         atomic_dec(&pr->swqe_avail);
2030
2031         if (skb_vlan_tag_present(skb)) {
2032                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2033                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2034         }
2035
2036         pr->tx_packets++;
2037         pr->tx_bytes += skb->len;
2038
2039         if (skb->len <= SWQE3_MAX_IMM) {
2040                 u32 sig_iv = port->sig_comp_iv;
2041                 u32 swqe_num = pr->swqe_id_counter;
2042                 ehea_xmit3(skb, dev, swqe);
2043                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2044                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2045                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2046                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2047                                                       sig_iv);
2048                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2049                         pr->swqe_ll_count = 0;
2050                 } else
2051                         pr->swqe_ll_count += 1;
2052         } else {
2053                 swqe->wr_id =
2054                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2055                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2056                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2057                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2058                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2059
2060                 pr->sq_skba.index++;
2061                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2062
2063                 lkey = pr->send_mr.lkey;
2064                 ehea_xmit2(skb, dev, swqe, lkey);
2065                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2066         }
2067         pr->swqe_id_counter += 1;
2068
2069         netif_info(port, tx_queued, dev,
2070                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2071         if (netif_msg_tx_queued(port))
2072                 ehea_dump(swqe, 512, "swqe");
2073
2074         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2075                 netif_tx_stop_queue(txq);
2076                 swqe->tx_control |= EHEA_SWQE_PURGE;
2077         }
2078
2079         ehea_post_swqe(pr->qp, swqe);
2080
2081         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2082                 pr->p_stats.queue_stopped++;
2083                 netif_tx_stop_queue(txq);
2084         }
2085
2086         return NETDEV_TX_OK;
2087 }
2088
2089 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2090 {
2091         struct ehea_port *port = netdev_priv(dev);
2092         struct ehea_adapter *adapter = port->adapter;
2093         struct hcp_ehea_port_cb1 *cb1;
2094         int index;
2095         u64 hret;
2096         int err = 0;
2097
2098         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2099         if (!cb1) {
2100                 pr_err("no mem for cb1\n");
2101                 err = -ENOMEM;
2102                 goto out;
2103         }
2104
2105         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2106                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2107         if (hret != H_SUCCESS) {
2108                 pr_err("query_ehea_port failed\n");
2109                 err = -EINVAL;
2110                 goto out;
2111         }
2112
2113         index = (vid / 64);
2114         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2115
2116         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2117                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2118         if (hret != H_SUCCESS) {
2119                 pr_err("modify_ehea_port failed\n");
2120                 err = -EINVAL;
2121         }
2122 out:
2123         free_page((unsigned long)cb1);
2124         return err;
2125 }
2126
2127 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2128 {
2129         struct ehea_port *port = netdev_priv(dev);
2130         struct ehea_adapter *adapter = port->adapter;
2131         struct hcp_ehea_port_cb1 *cb1;
2132         int index;
2133         u64 hret;
2134         int err = 0;
2135
2136         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2137         if (!cb1) {
2138                 pr_err("no mem for cb1\n");
2139                 err = -ENOMEM;
2140                 goto out;
2141         }
2142
2143         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2144                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2145         if (hret != H_SUCCESS) {
2146                 pr_err("query_ehea_port failed\n");
2147                 err = -EINVAL;
2148                 goto out;
2149         }
2150
2151         index = (vid / 64);
2152         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2153
2154         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2155                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2156         if (hret != H_SUCCESS) {
2157                 pr_err("modify_ehea_port failed\n");
2158                 err = -EINVAL;
2159         }
2160 out:
2161         free_page((unsigned long)cb1);
2162         return err;
2163 }
2164
2165 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2166 {
2167         int ret = -EIO;
2168         u64 hret;
2169         u16 dummy16 = 0;
2170         u64 dummy64 = 0;
2171         struct hcp_modify_qp_cb0 *cb0;
2172
2173         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2174         if (!cb0) {
2175                 ret = -ENOMEM;
2176                 goto out;
2177         }
2178
2179         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2180                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2181         if (hret != H_SUCCESS) {
2182                 pr_err("query_ehea_qp failed (1)\n");
2183                 goto out;
2184         }
2185
2186         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2187         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2188                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2189                                      &dummy64, &dummy64, &dummy16, &dummy16);
2190         if (hret != H_SUCCESS) {
2191                 pr_err("modify_ehea_qp failed (1)\n");
2192                 goto out;
2193         }
2194
2195         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197         if (hret != H_SUCCESS) {
2198                 pr_err("query_ehea_qp failed (2)\n");
2199                 goto out;
2200         }
2201
2202         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2203         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205                                      &dummy64, &dummy64, &dummy16, &dummy16);
2206         if (hret != H_SUCCESS) {
2207                 pr_err("modify_ehea_qp failed (2)\n");
2208                 goto out;
2209         }
2210
2211         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213         if (hret != H_SUCCESS) {
2214                 pr_err("query_ehea_qp failed (3)\n");
2215                 goto out;
2216         }
2217
2218         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2219         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221                                      &dummy64, &dummy64, &dummy16, &dummy16);
2222         if (hret != H_SUCCESS) {
2223                 pr_err("modify_ehea_qp failed (3)\n");
2224                 goto out;
2225         }
2226
2227         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229         if (hret != H_SUCCESS) {
2230                 pr_err("query_ehea_qp failed (4)\n");
2231                 goto out;
2232         }
2233
2234         ret = 0;
2235 out:
2236         free_page((unsigned long)cb0);
2237         return ret;
2238 }
2239
2240 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2241 {
2242         int ret, i;
2243         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2244         enum ehea_eq_type eq_type = EHEA_EQ;
2245
2246         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2247                                    EHEA_MAX_ENTRIES_EQ, 1);
2248         if (!port->qp_eq) {
2249                 ret = -EINVAL;
2250                 pr_err("ehea_create_eq failed (qp_eq)\n");
2251                 goto out_kill_eq;
2252         }
2253
2254         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2255         pr_cfg.max_entries_scq = sq_entries * 2;
2256         pr_cfg.max_entries_sq = sq_entries;
2257         pr_cfg.max_entries_rq1 = rq1_entries;
2258         pr_cfg.max_entries_rq2 = rq2_entries;
2259         pr_cfg.max_entries_rq3 = rq3_entries;
2260
2261         pr_cfg_small_rx.max_entries_rcq = 1;
2262         pr_cfg_small_rx.max_entries_scq = sq_entries;
2263         pr_cfg_small_rx.max_entries_sq = sq_entries;
2264         pr_cfg_small_rx.max_entries_rq1 = 1;
2265         pr_cfg_small_rx.max_entries_rq2 = 1;
2266         pr_cfg_small_rx.max_entries_rq3 = 1;
2267
2268         for (i = 0; i < def_qps; i++) {
2269                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2270                 if (ret)
2271                         goto out_clean_pr;
2272         }
2273         for (i = def_qps; i < def_qps; i++) {
2274                 ret = ehea_init_port_res(port, &port->port_res[i],
2275                                          &pr_cfg_small_rx, i);
2276                 if (ret)
2277                         goto out_clean_pr;
2278         }
2279
2280         return 0;
2281
2282 out_clean_pr:
2283         while (--i >= 0)
2284                 ehea_clean_portres(port, &port->port_res[i]);
2285
2286 out_kill_eq:
2287         ehea_destroy_eq(port->qp_eq);
2288         return ret;
2289 }
2290
2291 static int ehea_clean_all_portres(struct ehea_port *port)
2292 {
2293         int ret = 0;
2294         int i;
2295
2296         for (i = 0; i < port->num_def_qps; i++)
2297                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2298
2299         ret |= ehea_destroy_eq(port->qp_eq);
2300
2301         return ret;
2302 }
2303
2304 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2305 {
2306         if (adapter->active_ports)
2307                 return;
2308
2309         ehea_rem_mr(&adapter->mr);
2310 }
2311
2312 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2313 {
2314         if (adapter->active_ports)
2315                 return 0;
2316
2317         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2318 }
2319
2320 static int ehea_up(struct net_device *dev)
2321 {
2322         int ret, i;
2323         struct ehea_port *port = netdev_priv(dev);
2324
2325         if (port->state == EHEA_PORT_UP)
2326                 return 0;
2327
2328         ret = ehea_port_res_setup(port, port->num_def_qps);
2329         if (ret) {
2330                 netdev_err(dev, "port_res_failed\n");
2331                 goto out;
2332         }
2333
2334         /* Set default QP for this port */
2335         ret = ehea_configure_port(port);
2336         if (ret) {
2337                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2338                 goto out_clean_pr;
2339         }
2340
2341         ret = ehea_reg_interrupts(dev);
2342         if (ret) {
2343                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2344                 goto out_clean_pr;
2345         }
2346
2347         for (i = 0; i < port->num_def_qps; i++) {
2348                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2349                 if (ret) {
2350                         netdev_err(dev, "activate_qp failed\n");
2351                         goto out_free_irqs;
2352                 }
2353         }
2354
2355         for (i = 0; i < port->num_def_qps; i++) {
2356                 ret = ehea_fill_port_res(&port->port_res[i]);
2357                 if (ret) {
2358                         netdev_err(dev, "out_free_irqs\n");
2359                         goto out_free_irqs;
2360                 }
2361         }
2362
2363         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2364         if (ret) {
2365                 ret = -EIO;
2366                 goto out_free_irqs;
2367         }
2368
2369         port->state = EHEA_PORT_UP;
2370
2371         ret = 0;
2372         goto out;
2373
2374 out_free_irqs:
2375         ehea_free_interrupts(dev);
2376
2377 out_clean_pr:
2378         ehea_clean_all_portres(port);
2379 out:
2380         if (ret)
2381                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2382
2383         ehea_update_bcmc_registrations();
2384         ehea_update_firmware_handles();
2385
2386         return ret;
2387 }
2388
2389 static void port_napi_disable(struct ehea_port *port)
2390 {
2391         int i;
2392
2393         for (i = 0; i < port->num_def_qps; i++)
2394                 napi_disable(&port->port_res[i].napi);
2395 }
2396
2397 static void port_napi_enable(struct ehea_port *port)
2398 {
2399         int i;
2400
2401         for (i = 0; i < port->num_def_qps; i++)
2402                 napi_enable(&port->port_res[i].napi);
2403 }
2404
2405 static int ehea_open(struct net_device *dev)
2406 {
2407         int ret;
2408         struct ehea_port *port = netdev_priv(dev);
2409
2410         mutex_lock(&port->port_lock);
2411
2412         netif_info(port, ifup, dev, "enabling port\n");
2413
2414         netif_carrier_off(dev);
2415
2416         ret = ehea_up(dev);
2417         if (!ret) {
2418                 port_napi_enable(port);
2419                 netif_tx_start_all_queues(dev);
2420         }
2421
2422         mutex_unlock(&port->port_lock);
2423         schedule_delayed_work(&port->stats_work,
2424                               round_jiffies_relative(msecs_to_jiffies(1000)));
2425
2426         return ret;
2427 }
2428
2429 static int ehea_down(struct net_device *dev)
2430 {
2431         int ret;
2432         struct ehea_port *port = netdev_priv(dev);
2433
2434         if (port->state == EHEA_PORT_DOWN)
2435                 return 0;
2436
2437         ehea_drop_multicast_list(dev);
2438         ehea_allmulti(dev, 0);
2439         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2440
2441         ehea_free_interrupts(dev);
2442
2443         port->state = EHEA_PORT_DOWN;
2444
2445         ehea_update_bcmc_registrations();
2446
2447         ret = ehea_clean_all_portres(port);
2448         if (ret)
2449                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2450
2451         ehea_update_firmware_handles();
2452
2453         return ret;
2454 }
2455
2456 static int ehea_stop(struct net_device *dev)
2457 {
2458         int ret;
2459         struct ehea_port *port = netdev_priv(dev);
2460
2461         netif_info(port, ifdown, dev, "disabling port\n");
2462
2463         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2464         cancel_work_sync(&port->reset_task);
2465         cancel_delayed_work_sync(&port->stats_work);
2466         mutex_lock(&port->port_lock);
2467         netif_tx_stop_all_queues(dev);
2468         port_napi_disable(port);
2469         ret = ehea_down(dev);
2470         mutex_unlock(&port->port_lock);
2471         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2472         return ret;
2473 }
2474
2475 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2476 {
2477         struct ehea_qp qp = *orig_qp;
2478         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2479         struct ehea_swqe *swqe;
2480         int wqe_index;
2481         int i;
2482
2483         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2484                 swqe = ehea_get_swqe(&qp, &wqe_index);
2485                 swqe->tx_control |= EHEA_SWQE_PURGE;
2486         }
2487 }
2488
2489 static void ehea_flush_sq(struct ehea_port *port)
2490 {
2491         int i;
2492
2493         for (i = 0; i < port->num_def_qps; i++) {
2494                 struct ehea_port_res *pr = &port->port_res[i];
2495                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2496                 int ret;
2497
2498                 ret = wait_event_timeout(port->swqe_avail_wq,
2499                          atomic_read(&pr->swqe_avail) >= swqe_max,
2500                          msecs_to_jiffies(100));
2501
2502                 if (!ret) {
2503                         pr_err("WARNING: sq not flushed completely\n");
2504                         break;
2505                 }
2506         }
2507 }
2508
2509 static int ehea_stop_qps(struct net_device *dev)
2510 {
2511         struct ehea_port *port = netdev_priv(dev);
2512         struct ehea_adapter *adapter = port->adapter;
2513         struct hcp_modify_qp_cb0 *cb0;
2514         int ret = -EIO;
2515         int dret;
2516         int i;
2517         u64 hret;
2518         u64 dummy64 = 0;
2519         u16 dummy16 = 0;
2520
2521         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2522         if (!cb0) {
2523                 ret = -ENOMEM;
2524                 goto out;
2525         }
2526
2527         for (i = 0; i < (port->num_def_qps); i++) {
2528                 struct ehea_port_res *pr =  &port->port_res[i];
2529                 struct ehea_qp *qp = pr->qp;
2530
2531                 /* Purge send queue */
2532                 ehea_purge_sq(qp);
2533
2534                 /* Disable queue pair */
2535                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2536                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2537                                             cb0);
2538                 if (hret != H_SUCCESS) {
2539                         pr_err("query_ehea_qp failed (1)\n");
2540                         goto out;
2541                 }
2542
2543                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2544                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2545
2546                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2547                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2548                                                             1), cb0, &dummy64,
2549                                              &dummy64, &dummy16, &dummy16);
2550                 if (hret != H_SUCCESS) {
2551                         pr_err("modify_ehea_qp failed (1)\n");
2552                         goto out;
2553                 }
2554
2555                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2556                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2557                                             cb0);
2558                 if (hret != H_SUCCESS) {
2559                         pr_err("query_ehea_qp failed (2)\n");
2560                         goto out;
2561                 }
2562
2563                 /* deregister shared memory regions */
2564                 dret = ehea_rem_smrs(pr);
2565                 if (dret) {
2566                         pr_err("unreg shared memory region failed\n");
2567                         goto out;
2568                 }
2569         }
2570
2571         ret = 0;
2572 out:
2573         free_page((unsigned long)cb0);
2574
2575         return ret;
2576 }
2577
2578 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2579 {
2580         struct ehea_qp qp = *orig_qp;
2581         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2582         struct ehea_rwqe *rwqe;
2583         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2584         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2585         struct sk_buff *skb;
2586         u32 lkey = pr->recv_mr.lkey;
2587
2588
2589         int i;
2590         int index;
2591
2592         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2593                 rwqe = ehea_get_next_rwqe(&qp, 2);
2594                 rwqe->sg_list[0].l_key = lkey;
2595                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2596                 skb = skba_rq2[index];
2597                 if (skb)
2598                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2599         }
2600
2601         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2602                 rwqe = ehea_get_next_rwqe(&qp, 3);
2603                 rwqe->sg_list[0].l_key = lkey;
2604                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2605                 skb = skba_rq3[index];
2606                 if (skb)
2607                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2608         }
2609 }
2610
2611 static int ehea_restart_qps(struct net_device *dev)
2612 {
2613         struct ehea_port *port = netdev_priv(dev);
2614         struct ehea_adapter *adapter = port->adapter;
2615         int ret = 0;
2616         int i;
2617
2618         struct hcp_modify_qp_cb0 *cb0;
2619         u64 hret;
2620         u64 dummy64 = 0;
2621         u16 dummy16 = 0;
2622
2623         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2624         if (!cb0) {
2625                 ret = -ENOMEM;
2626                 goto out;
2627         }
2628
2629         for (i = 0; i < (port->num_def_qps); i++) {
2630                 struct ehea_port_res *pr =  &port->port_res[i];
2631                 struct ehea_qp *qp = pr->qp;
2632
2633                 ret = ehea_gen_smrs(pr);
2634                 if (ret) {
2635                         netdev_err(dev, "creation of shared memory regions failed\n");
2636                         goto out;
2637                 }
2638
2639                 ehea_update_rqs(qp, pr);
2640
2641                 /* Enable queue pair */
2642                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2643                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2644                                             cb0);
2645                 if (hret != H_SUCCESS) {
2646                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2647                         goto out;
2648                 }
2649
2650                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2651                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2652
2653                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2654                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2655                                                             1), cb0, &dummy64,
2656                                              &dummy64, &dummy16, &dummy16);
2657                 if (hret != H_SUCCESS) {
2658                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2659                         goto out;
2660                 }
2661
2662                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2663                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2664                                             cb0);
2665                 if (hret != H_SUCCESS) {
2666                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2667                         goto out;
2668                 }
2669
2670                 /* refill entire queue */
2671                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2672                 ehea_refill_rq2(pr, 0);
2673                 ehea_refill_rq3(pr, 0);
2674         }
2675 out:
2676         free_page((unsigned long)cb0);
2677
2678         return ret;
2679 }
2680
2681 static void ehea_reset_port(struct work_struct *work)
2682 {
2683         int ret;
2684         struct ehea_port *port =
2685                 container_of(work, struct ehea_port, reset_task);
2686         struct net_device *dev = port->netdev;
2687
2688         mutex_lock(&dlpar_mem_lock);
2689         port->resets++;
2690         mutex_lock(&port->port_lock);
2691         netif_tx_disable(dev);
2692
2693         port_napi_disable(port);
2694
2695         ehea_down(dev);
2696
2697         ret = ehea_up(dev);
2698         if (ret)
2699                 goto out;
2700
2701         ehea_set_multicast_list(dev);
2702
2703         netif_info(port, timer, dev, "reset successful\n");
2704
2705         port_napi_enable(port);
2706
2707         netif_tx_wake_all_queues(dev);
2708 out:
2709         mutex_unlock(&port->port_lock);
2710         mutex_unlock(&dlpar_mem_lock);
2711 }
2712
2713 static void ehea_rereg_mrs(void)
2714 {
2715         int ret, i;
2716         struct ehea_adapter *adapter;
2717
2718         pr_info("LPAR memory changed - re-initializing driver\n");
2719
2720         list_for_each_entry(adapter, &adapter_list, list)
2721                 if (adapter->active_ports) {
2722                         /* Shutdown all ports */
2723                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2724                                 struct ehea_port *port = adapter->port[i];
2725                                 struct net_device *dev;
2726
2727                                 if (!port)
2728                                         continue;
2729
2730                                 dev = port->netdev;
2731
2732                                 if (dev->flags & IFF_UP) {
2733                                         mutex_lock(&port->port_lock);
2734                                         netif_tx_disable(dev);
2735                                         ehea_flush_sq(port);
2736                                         ret = ehea_stop_qps(dev);
2737                                         if (ret) {
2738                                                 mutex_unlock(&port->port_lock);
2739                                                 goto out;
2740                                         }
2741                                         port_napi_disable(port);
2742                                         mutex_unlock(&port->port_lock);
2743                                 }
2744                                 reset_sq_restart_flag(port);
2745                         }
2746
2747                         /* Unregister old memory region */
2748                         ret = ehea_rem_mr(&adapter->mr);
2749                         if (ret) {
2750                                 pr_err("unregister MR failed - driver inoperable!\n");
2751                                 goto out;
2752                         }
2753                 }
2754
2755         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2756
2757         list_for_each_entry(adapter, &adapter_list, list)
2758                 if (adapter->active_ports) {
2759                         /* Register new memory region */
2760                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2761                         if (ret) {
2762                                 pr_err("register MR failed - driver inoperable!\n");
2763                                 goto out;
2764                         }
2765
2766                         /* Restart all ports */
2767                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2768                                 struct ehea_port *port = adapter->port[i];
2769
2770                                 if (port) {
2771                                         struct net_device *dev = port->netdev;
2772
2773                                         if (dev->flags & IFF_UP) {
2774                                                 mutex_lock(&port->port_lock);
2775                                                 ret = ehea_restart_qps(dev);
2776                                                 if (!ret) {
2777                                                         check_sqs(port);
2778                                                         port_napi_enable(port);
2779                                                         netif_tx_wake_all_queues(dev);
2780                                                 } else {
2781                                                         netdev_err(dev, "Unable to restart QPS\n");
2782                                                 }
2783                                                 mutex_unlock(&port->port_lock);
2784                                         }
2785                                 }
2786                         }
2787                 }
2788         pr_info("re-initializing driver complete\n");
2789 out:
2790         return;
2791 }
2792
2793 static void ehea_tx_watchdog(struct net_device *dev)
2794 {
2795         struct ehea_port *port = netdev_priv(dev);
2796
2797         if (netif_carrier_ok(dev) &&
2798             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2799                 ehea_schedule_port_reset(port);
2800 }
2801
2802 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2803 {
2804         struct hcp_query_ehea *cb;
2805         u64 hret;
2806         int ret;
2807
2808         cb = (void *)get_zeroed_page(GFP_KERNEL);
2809         if (!cb) {
2810                 ret = -ENOMEM;
2811                 goto out;
2812         }
2813
2814         hret = ehea_h_query_ehea(adapter->handle, cb);
2815
2816         if (hret != H_SUCCESS) {
2817                 ret = -EIO;
2818                 goto out_herr;
2819         }
2820
2821         adapter->max_mc_mac = cb->max_mc_mac - 1;
2822         ret = 0;
2823
2824 out_herr:
2825         free_page((unsigned long)cb);
2826 out:
2827         return ret;
2828 }
2829
2830 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2831 {
2832         struct hcp_ehea_port_cb4 *cb4;
2833         u64 hret;
2834         int ret = 0;
2835
2836         *jumbo = 0;
2837
2838         /* (Try to) enable *jumbo frames */
2839         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2840         if (!cb4) {
2841                 pr_err("no mem for cb4\n");
2842                 ret = -ENOMEM;
2843                 goto out;
2844         } else {
2845                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2846                                               port->logical_port_id,
2847                                               H_PORT_CB4,
2848                                               H_PORT_CB4_JUMBO, cb4);
2849                 if (hret == H_SUCCESS) {
2850                         if (cb4->jumbo_frame)
2851                                 *jumbo = 1;
2852                         else {
2853                                 cb4->jumbo_frame = 1;
2854                                 hret = ehea_h_modify_ehea_port(port->adapter->
2855                                                                handle,
2856                                                                port->
2857                                                                logical_port_id,
2858                                                                H_PORT_CB4,
2859                                                                H_PORT_CB4_JUMBO,
2860                                                                cb4);
2861                                 if (hret == H_SUCCESS)
2862                                         *jumbo = 1;
2863                         }
2864                 } else
2865                         ret = -EINVAL;
2866
2867                 free_page((unsigned long)cb4);
2868         }
2869 out:
2870         return ret;
2871 }
2872
2873 static ssize_t ehea_show_port_id(struct device *dev,
2874                                  struct device_attribute *attr, char *buf)
2875 {
2876         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2877         return sprintf(buf, "%d", port->logical_port_id);
2878 }
2879
2880 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2881
2882 static void logical_port_release(struct device *dev)
2883 {
2884         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2885         of_node_put(port->ofdev.dev.of_node);
2886 }
2887
2888 static struct device *ehea_register_port(struct ehea_port *port,
2889                                          struct device_node *dn)
2890 {
2891         int ret;
2892
2893         port->ofdev.dev.of_node = of_node_get(dn);
2894         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2895         port->ofdev.dev.bus = &ibmebus_bus_type;
2896
2897         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2898         port->ofdev.dev.release = logical_port_release;
2899
2900         ret = of_device_register(&port->ofdev);
2901         if (ret) {
2902                 pr_err("failed to register device. ret=%d\n", ret);
2903                 goto out;
2904         }
2905
2906         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2907         if (ret) {
2908                 pr_err("failed to register attributes, ret=%d\n", ret);
2909                 goto out_unreg_of_dev;
2910         }
2911
2912         return &port->ofdev.dev;
2913
2914 out_unreg_of_dev:
2915         of_device_unregister(&port->ofdev);
2916 out:
2917         return NULL;
2918 }
2919
2920 static void ehea_unregister_port(struct ehea_port *port)
2921 {
2922         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2923         of_device_unregister(&port->ofdev);
2924 }
2925
2926 static const struct net_device_ops ehea_netdev_ops = {
2927         .ndo_open               = ehea_open,
2928         .ndo_stop               = ehea_stop,
2929         .ndo_start_xmit         = ehea_start_xmit,
2930         .ndo_get_stats64        = ehea_get_stats64,
2931         .ndo_set_mac_address    = ehea_set_mac_addr,
2932         .ndo_validate_addr      = eth_validate_addr,
2933         .ndo_set_rx_mode        = ehea_set_multicast_list,
2934         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2935         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2936         .ndo_tx_timeout         = ehea_tx_watchdog,
2937 };
2938
2939 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2940                                          u32 logical_port_id,
2941                                          struct device_node *dn)
2942 {
2943         int ret;
2944         struct net_device *dev;
2945         struct ehea_port *port;
2946         struct device *port_dev;
2947         int jumbo;
2948
2949         /* allocate memory for the port structures */
2950         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2951
2952         if (!dev) {
2953                 ret = -ENOMEM;
2954                 goto out_err;
2955         }
2956
2957         port = netdev_priv(dev);
2958
2959         mutex_init(&port->port_lock);
2960         port->state = EHEA_PORT_DOWN;
2961         port->sig_comp_iv = sq_entries / 10;
2962
2963         port->adapter = adapter;
2964         port->netdev = dev;
2965         port->logical_port_id = logical_port_id;
2966
2967         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2968
2969         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2970         if (!port->mc_list) {
2971                 ret = -ENOMEM;
2972                 goto out_free_ethdev;
2973         }
2974
2975         INIT_LIST_HEAD(&port->mc_list->list);
2976
2977         ret = ehea_sense_port_attr(port);
2978         if (ret)
2979                 goto out_free_mc_list;
2980
2981         netif_set_real_num_rx_queues(dev, port->num_def_qps);
2982         netif_set_real_num_tx_queues(dev, port->num_def_qps);
2983
2984         port_dev = ehea_register_port(port, dn);
2985         if (!port_dev)
2986                 goto out_free_mc_list;
2987
2988         SET_NETDEV_DEV(dev, port_dev);
2989
2990         /* initialize net_device structure */
2991         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2992
2993         dev->netdev_ops = &ehea_netdev_ops;
2994         ehea_set_ethtool_ops(dev);
2995
2996         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2997                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
2998         dev->features = NETIF_F_SG | NETIF_F_TSO |
2999                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3000                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3001                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3002         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3003                         NETIF_F_IP_CSUM;
3004         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3005
3006         /* MTU range: 68 - 9022 */
3007         dev->min_mtu = ETH_MIN_MTU;
3008         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3009
3010         INIT_WORK(&port->reset_task, ehea_reset_port);
3011         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3012
3013         init_waitqueue_head(&port->swqe_avail_wq);
3014         init_waitqueue_head(&port->restart_wq);
3015
3016         ret = register_netdev(dev);
3017         if (ret) {
3018                 pr_err("register_netdev failed. ret=%d\n", ret);
3019                 goto out_unreg_port;
3020         }
3021
3022         ret = ehea_get_jumboframe_status(port, &jumbo);
3023         if (ret)
3024                 netdev_err(dev, "failed determining jumbo frame status\n");
3025
3026         netdev_info(dev, "Jumbo frames are %sabled\n",
3027                     jumbo == 1 ? "en" : "dis");
3028
3029         adapter->active_ports++;
3030
3031         return port;
3032
3033 out_unreg_port:
3034         ehea_unregister_port(port);
3035
3036 out_free_mc_list:
3037         kfree(port->mc_list);
3038
3039 out_free_ethdev:
3040         free_netdev(dev);
3041
3042 out_err:
3043         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3044                logical_port_id, ret);
3045         return NULL;
3046 }
3047
3048 static void ehea_shutdown_single_port(struct ehea_port *port)
3049 {
3050         struct ehea_adapter *adapter = port->adapter;
3051
3052         cancel_work_sync(&port->reset_task);
3053         cancel_delayed_work_sync(&port->stats_work);
3054         unregister_netdev(port->netdev);
3055         ehea_unregister_port(port);
3056         kfree(port->mc_list);
3057         free_netdev(port->netdev);
3058         adapter->active_ports--;
3059 }
3060
3061 static int ehea_setup_ports(struct ehea_adapter *adapter)
3062 {
3063         struct device_node *lhea_dn;
3064         struct device_node *eth_dn = NULL;
3065
3066         const u32 *dn_log_port_id;
3067         int i = 0;
3068
3069         lhea_dn = adapter->ofdev->dev.of_node;
3070         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3071
3072                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3073                                                  NULL);
3074                 if (!dn_log_port_id) {
3075                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3076                         continue;
3077                 }
3078
3079                 if (ehea_add_adapter_mr(adapter)) {
3080                         pr_err("creating MR failed\n");
3081                         of_node_put(eth_dn);
3082                         return -EIO;
3083                 }
3084
3085                 adapter->port[i] = ehea_setup_single_port(adapter,
3086                                                           *dn_log_port_id,
3087                                                           eth_dn);
3088                 if (adapter->port[i])
3089                         netdev_info(adapter->port[i]->netdev,
3090                                     "logical port id #%d\n", *dn_log_port_id);
3091                 else
3092                         ehea_remove_adapter_mr(adapter);
3093
3094                 i++;
3095         }
3096         return 0;
3097 }
3098
3099 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3100                                            u32 logical_port_id)
3101 {
3102         struct device_node *lhea_dn;
3103         struct device_node *eth_dn = NULL;
3104         const u32 *dn_log_port_id;
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                         if (*dn_log_port_id == logical_port_id)
3113                                 return eth_dn;
3114         }
3115
3116         return NULL;
3117 }
3118
3119 static ssize_t ehea_probe_port(struct device *dev,
3120                                struct device_attribute *attr,
3121                                const char *buf, size_t count)
3122 {
3123         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3124         struct ehea_port *port;
3125         struct device_node *eth_dn = NULL;
3126         int i;
3127
3128         u32 logical_port_id;
3129
3130         sscanf(buf, "%d", &logical_port_id);
3131
3132         port = ehea_get_port(adapter, logical_port_id);
3133
3134         if (port) {
3135                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3136                             logical_port_id);
3137                 return -EINVAL;
3138         }
3139
3140         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3141
3142         if (!eth_dn) {
3143                 pr_info("no logical port with id %d found\n", logical_port_id);
3144                 return -EINVAL;
3145         }
3146
3147         if (ehea_add_adapter_mr(adapter)) {
3148                 pr_err("creating MR failed\n");
3149                 of_node_put(eth_dn);
3150                 return -EIO;
3151         }
3152
3153         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3154
3155         of_node_put(eth_dn);
3156
3157         if (port) {
3158                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3159                         if (!adapter->port[i]) {
3160                                 adapter->port[i] = port;
3161                                 break;
3162                         }
3163
3164                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3165                             logical_port_id);
3166         } else {
3167                 ehea_remove_adapter_mr(adapter);
3168                 return -EIO;
3169         }
3170
3171         return (ssize_t) count;
3172 }
3173
3174 static ssize_t ehea_remove_port(struct device *dev,
3175                                 struct device_attribute *attr,
3176                                 const char *buf, size_t count)
3177 {
3178         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3179         struct ehea_port *port;
3180         int i;
3181         u32 logical_port_id;
3182
3183         sscanf(buf, "%d", &logical_port_id);
3184
3185         port = ehea_get_port(adapter, logical_port_id);
3186
3187         if (port) {
3188                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3189                             logical_port_id);
3190
3191                 ehea_shutdown_single_port(port);
3192
3193                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3194                         if (adapter->port[i] == port) {
3195                                 adapter->port[i] = NULL;
3196                                 break;
3197                         }
3198         } else {
3199                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3200                        logical_port_id);
3201                 return -EINVAL;
3202         }
3203
3204         ehea_remove_adapter_mr(adapter);
3205
3206         return (ssize_t) count;
3207 }
3208
3209 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3210 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3211
3212 static int ehea_create_device_sysfs(struct platform_device *dev)
3213 {
3214         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3215         if (ret)
3216                 goto out;
3217
3218         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3219 out:
3220         return ret;
3221 }
3222
3223 static void ehea_remove_device_sysfs(struct platform_device *dev)
3224 {
3225         device_remove_file(&dev->dev, &dev_attr_probe_port);
3226         device_remove_file(&dev->dev, &dev_attr_remove_port);
3227 }
3228
3229 static int ehea_reboot_notifier(struct notifier_block *nb,
3230                                 unsigned long action, void *unused)
3231 {
3232         if (action == SYS_RESTART) {
3233                 pr_info("Reboot: freeing all eHEA resources\n");
3234                 ibmebus_unregister_driver(&ehea_driver);
3235         }
3236         return NOTIFY_DONE;
3237 }
3238
3239 static struct notifier_block ehea_reboot_nb = {
3240         .notifier_call = ehea_reboot_notifier,
3241 };
3242
3243 static int ehea_mem_notifier(struct notifier_block *nb,
3244                              unsigned long action, void *data)
3245 {
3246         int ret = NOTIFY_BAD;
3247         struct memory_notify *arg = data;
3248
3249         mutex_lock(&dlpar_mem_lock);
3250
3251         switch (action) {
3252         case MEM_CANCEL_OFFLINE:
3253                 pr_info("memory offlining canceled");
3254                 /* Fall through - re-add canceled memory block */
3255
3256         case MEM_ONLINE:
3257                 pr_info("memory is going online");
3258                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3259                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3260                         goto out_unlock;
3261                 ehea_rereg_mrs();
3262                 break;
3263
3264         case MEM_GOING_OFFLINE:
3265                 pr_info("memory is going offline");
3266                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3267                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3268                         goto out_unlock;
3269                 ehea_rereg_mrs();
3270                 break;
3271
3272         default:
3273                 break;
3274         }
3275
3276         ehea_update_firmware_handles();
3277         ret = NOTIFY_OK;
3278
3279 out_unlock:
3280         mutex_unlock(&dlpar_mem_lock);
3281         return ret;
3282 }
3283
3284 static struct notifier_block ehea_mem_nb = {
3285         .notifier_call = ehea_mem_notifier,
3286 };
3287
3288 static void ehea_crash_handler(void)
3289 {
3290         int i;
3291
3292         if (ehea_fw_handles.arr)
3293                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3294                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3295                                              ehea_fw_handles.arr[i].fwh,
3296                                              FORCE_FREE);
3297
3298         if (ehea_bcmc_regs.arr)
3299                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3300                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3301                                               ehea_bcmc_regs.arr[i].port_id,
3302                                               ehea_bcmc_regs.arr[i].reg_type,
3303                                               ehea_bcmc_regs.arr[i].macaddr,
3304                                               0, H_DEREG_BCMC);
3305 }
3306
3307 static atomic_t ehea_memory_hooks_registered;
3308
3309 /* Register memory hooks on probe of first adapter */
3310 static int ehea_register_memory_hooks(void)
3311 {
3312         int ret = 0;
3313
3314         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3315                 return 0;
3316
3317         ret = ehea_create_busmap();
3318         if (ret) {
3319                 pr_info("ehea_create_busmap failed\n");
3320                 goto out;
3321         }
3322
3323         ret = register_reboot_notifier(&ehea_reboot_nb);
3324         if (ret) {
3325                 pr_info("register_reboot_notifier failed\n");
3326                 goto out;
3327         }
3328
3329         ret = register_memory_notifier(&ehea_mem_nb);
3330         if (ret) {
3331                 pr_info("register_memory_notifier failed\n");
3332                 goto out2;
3333         }
3334
3335         ret = crash_shutdown_register(ehea_crash_handler);
3336         if (ret) {
3337                 pr_info("crash_shutdown_register failed\n");
3338                 goto out3;
3339         }
3340
3341         return 0;
3342
3343 out3:
3344         unregister_memory_notifier(&ehea_mem_nb);
3345 out2:
3346         unregister_reboot_notifier(&ehea_reboot_nb);
3347 out:
3348         atomic_dec(&ehea_memory_hooks_registered);
3349         return ret;
3350 }
3351
3352 static void ehea_unregister_memory_hooks(void)
3353 {
3354         /* Only remove the hooks if we've registered them */
3355         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3356                 return;
3357
3358         unregister_reboot_notifier(&ehea_reboot_nb);
3359         if (crash_shutdown_unregister(ehea_crash_handler))
3360                 pr_info("failed unregistering crash handler\n");
3361         unregister_memory_notifier(&ehea_mem_nb);
3362 }
3363
3364 static int ehea_probe_adapter(struct platform_device *dev)
3365 {
3366         struct ehea_adapter *adapter;
3367         const u64 *adapter_handle;
3368         int ret;
3369         int i;
3370
3371         ret = ehea_register_memory_hooks();
3372         if (ret)
3373                 return ret;
3374
3375         if (!dev || !dev->dev.of_node) {
3376                 pr_err("Invalid ibmebus device probed\n");
3377                 return -EINVAL;
3378         }
3379
3380         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3381         if (!adapter) {
3382                 ret = -ENOMEM;
3383                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3384                 goto out;
3385         }
3386
3387         list_add(&adapter->list, &adapter_list);
3388
3389         adapter->ofdev = dev;
3390
3391         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3392                                          NULL);
3393         if (adapter_handle)
3394                 adapter->handle = *adapter_handle;
3395
3396         if (!adapter->handle) {
3397                 dev_err(&dev->dev, "failed getting handle for adapter"
3398                         " '%pOF'\n", dev->dev.of_node);
3399                 ret = -ENODEV;
3400                 goto out_free_ad;
3401         }
3402
3403         adapter->pd = EHEA_PD_ID;
3404
3405         platform_set_drvdata(dev, adapter);
3406
3407
3408         /* initialize adapter and ports */
3409         /* get adapter properties */
3410         ret = ehea_sense_adapter_attr(adapter);
3411         if (ret) {
3412                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3413                 goto out_free_ad;
3414         }
3415
3416         adapter->neq = ehea_create_eq(adapter,
3417                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3418         if (!adapter->neq) {
3419                 ret = -EIO;
3420                 dev_err(&dev->dev, "NEQ creation failed\n");
3421                 goto out_free_ad;
3422         }
3423
3424         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3425                      (unsigned long)adapter);
3426
3427         ret = ehea_create_device_sysfs(dev);
3428         if (ret)
3429                 goto out_kill_eq;
3430
3431         ret = ehea_setup_ports(adapter);
3432         if (ret) {
3433                 dev_err(&dev->dev, "setup_ports failed\n");
3434                 goto out_rem_dev_sysfs;
3435         }
3436
3437         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3438                                   ehea_interrupt_neq, 0,
3439                                   "ehea_neq", adapter);
3440         if (ret) {
3441                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3442                 goto out_shutdown_ports;
3443         }
3444
3445         /* Handle any events that might be pending. */
3446         tasklet_hi_schedule(&adapter->neq_tasklet);
3447
3448         ret = 0;
3449         goto out;
3450
3451 out_shutdown_ports:
3452         for (i = 0; i < EHEA_MAX_PORTS; i++)
3453                 if (adapter->port[i]) {
3454                         ehea_shutdown_single_port(adapter->port[i]);
3455                         adapter->port[i] = NULL;
3456                 }
3457
3458 out_rem_dev_sysfs:
3459         ehea_remove_device_sysfs(dev);
3460
3461 out_kill_eq:
3462         ehea_destroy_eq(adapter->neq);
3463
3464 out_free_ad:
3465         list_del(&adapter->list);
3466
3467 out:
3468         ehea_update_firmware_handles();
3469
3470         return ret;
3471 }
3472
3473 static int ehea_remove(struct platform_device *dev)
3474 {
3475         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3476         int i;
3477
3478         for (i = 0; i < EHEA_MAX_PORTS; i++)
3479                 if (adapter->port[i]) {
3480                         ehea_shutdown_single_port(adapter->port[i]);
3481                         adapter->port[i] = NULL;
3482                 }
3483
3484         ehea_remove_device_sysfs(dev);
3485
3486         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3487         tasklet_kill(&adapter->neq_tasklet);
3488
3489         ehea_destroy_eq(adapter->neq);
3490         ehea_remove_adapter_mr(adapter);
3491         list_del(&adapter->list);
3492
3493         ehea_update_firmware_handles();
3494
3495         return 0;
3496 }
3497
3498 static int check_module_parm(void)
3499 {
3500         int ret = 0;
3501
3502         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3503             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3504                 pr_info("Bad parameter: rq1_entries\n");
3505                 ret = -EINVAL;
3506         }
3507         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3508             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3509                 pr_info("Bad parameter: rq2_entries\n");
3510                 ret = -EINVAL;
3511         }
3512         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3513             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3514                 pr_info("Bad parameter: rq3_entries\n");
3515                 ret = -EINVAL;
3516         }
3517         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3518             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3519                 pr_info("Bad parameter: sq_entries\n");
3520                 ret = -EINVAL;
3521         }
3522
3523         return ret;
3524 }
3525
3526 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3527 {
3528         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3529 }
3530
3531 static DRIVER_ATTR_RO(capabilities);
3532
3533 static int __init ehea_module_init(void)
3534 {
3535         int ret;
3536
3537         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3538
3539         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3540         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3541
3542         mutex_init(&ehea_fw_handles.lock);
3543         spin_lock_init(&ehea_bcmc_regs.lock);
3544
3545         ret = check_module_parm();
3546         if (ret)
3547                 goto out;
3548
3549         ret = ibmebus_register_driver(&ehea_driver);
3550         if (ret) {
3551                 pr_err("failed registering eHEA device driver on ebus\n");
3552                 goto out;
3553         }
3554
3555         ret = driver_create_file(&ehea_driver.driver,
3556                                  &driver_attr_capabilities);
3557         if (ret) {
3558                 pr_err("failed to register capabilities attribute, ret=%d\n",
3559                        ret);
3560                 goto out2;
3561         }
3562
3563         return ret;
3564
3565 out2:
3566         ibmebus_unregister_driver(&ehea_driver);
3567 out:
3568         return ret;
3569 }
3570
3571 static void __exit ehea_module_exit(void)
3572 {
3573         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3574         ibmebus_unregister_driver(&ehea_driver);
3575         ehea_unregister_memory_hooks();
3576         kfree(ehea_fw_handles.arr);
3577         kfree(ehea_bcmc_regs.arr);
3578         ehea_destroy_busmap();
3579 }
3580
3581 module_init(ehea_module_init);
3582 module_exit(ehea_module_exit);