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 <[email protected]>
  11  *       Jan-Bernd Themann <[email protected]>
  12  *       Thomas Klein <[email protected]>
  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 #include <linux/of.h>
  33 #include <linux/of_device.h>
  34 #include <linux/platform_device.h>
  35
  36 #include <net/ip.h>
  37
  38 #include "ehea.h"
  39 #include "ehea_qmr.h"
  40 #include "ehea_phyp.h"
  41
  42
  43 MODULE_LICENSE("GPL");
  44 MODULE_AUTHOR("Christoph Raisch <[email protected]>");
  45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  46 MODULE_VERSION(DRV_VERSION);
  47
  48
  49 static int msg_level = -1;
  50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54 static int use_mcs = 1;
  55 static int prop_carrier_state;
  56
  57 module_param(msg_level, int, 0);
  58 module_param(rq1_entries, int, 0);
  59 module_param(rq2_entries, int, 0);
  60 module_param(rq3_entries, int, 0);
  61 module_param(sq_entries, int, 0);
  62 module_param(prop_carrier_state, int, 0);
  63 module_param(use_mcs, int, 0);
  64
  65 MODULE_PARM_DESC(msg_level, "msg_level");
  66 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  67                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  68 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  69                  "[2^x - 1], x = [7..14]. Default = "
  70                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  71 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  72                  "[2^x - 1], x = [7..14]. Default = "
  73                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  74 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  75                  "[2^x - 1], x = [7..14]. Default = "
  76                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  77 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  78                  "[2^x - 1], x = [7..14]. Default = "
  79                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  80 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  81                  "Default = 1");
  82
  83 static int port_name_cnt;
  84 static LIST_HEAD(adapter_list);
  85 static unsigned long ehea_driver_flags;
  86 static DEFINE_MUTEX(dlpar_mem_lock);
  87 static struct ehea_fw_handle_array ehea_fw_handles;
  88 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  89
  90
  91 static int ehea_probe_adapter(struct platform_device *dev);
  92
  93 static void ehea_remove(struct platform_device *dev);
  94
  95 static const struct of_device_id ehea_module_device_table[] = {
  96         {
  97                 .name = "lhea",
  98                 .compatible = "IBM,lhea",
  99         },
 100         {
 101                 .type = "network",
 102                 .compatible = "IBM,lhea-ethernet",
 103         },
 104         {},
 105 };
 106 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 107
 108 static const struct of_device_id ehea_device_table[] = {
 109         {
 110                 .name = "lhea",
 111                 .compatible = "IBM,lhea",
 112         },
 113         {},
 114 };
 115 MODULE_DEVICE_TABLE(of, ehea_device_table);
 116
 117 static struct platform_driver ehea_driver = {
 118         .driver = {
 119                 .name = "ehea",
 120                 .owner = THIS_MODULE,
 121                 .of_match_table = ehea_device_table,
 122         },
 123         .probe = ehea_probe_adapter,
 124         .remove = ehea_remove,
 125 };
 126
 127 void ehea_dump(void *adr, int len, char *msg)
 128 {
 129         int x;
 130         unsigned char *deb = adr;
 131         for (x = 0; x < len; x += 16) {
 132                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 133                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 134                 deb += 16;
 135         }
 136 }
 137
 138 static void ehea_schedule_port_reset(struct ehea_port *port)
 139 {
 140         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 141                 schedule_work(&port->reset_task);
 142 }
 143
 144 static void ehea_update_firmware_handles(void)
 145 {
 146         struct ehea_fw_handle_entry *arr = NULL;
 147         struct ehea_adapter *adapter;
 148         int num_adapters = 0;
 149         int num_ports = 0;
 150         int num_portres = 0;
 151         int i = 0;
 152         int num_fw_handles, k, l;
 153
 154         /* Determine number of handles */
 155         mutex_lock(&ehea_fw_handles.lock);
 156
 157         list_for_each_entry(adapter, &adapter_list, list) {
 158                 num_adapters++;
 159
 160                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 161                         struct ehea_port *port = adapter->port[k];
 162
 163                         if (!port || (port->state != EHEA_PORT_UP))
 164                                 continue;
 165
 166                         num_ports++;
 167                         num_portres += port->num_def_qps;
 168                 }
 169         }
 170
 171         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 172                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 173                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 174
 175         if (num_fw_handles) {
 176                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 177                 if (!arr)
 178                         goto out;  /* Keep the existing array */
 179         } else
 180                 goto out_update;
 181
 182         list_for_each_entry(adapter, &adapter_list, list) {
 183                 if (num_adapters == 0)
 184                         break;
 185
 186                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 187                         struct ehea_port *port = adapter->port[k];
 188
 189                         if (!port || (port->state != EHEA_PORT_UP) ||
 190                             (num_ports == 0))
 191                                 continue;
 192
 193                         for (l = 0; l < port->num_def_qps; l++) {
 194                                 struct ehea_port_res *pr = &port->port_res[l];
 195
 196                                 arr[i].adh = adapter->handle;
 197                                 arr[i++].fwh = pr->qp->fw_handle;
 198                                 arr[i].adh = adapter->handle;
 199                                 arr[i++].fwh = pr->send_cq->fw_handle;
 200                                 arr[i].adh = adapter->handle;
 201                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 202                                 arr[i].adh = adapter->handle;
 203                                 arr[i++].fwh = pr->eq->fw_handle;
 204                                 arr[i].adh = adapter->handle;
 205                                 arr[i++].fwh = pr->send_mr.handle;
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->recv_mr.handle;
 208                         }
 209                         arr[i].adh = adapter->handle;
 210                         arr[i++].fwh = port->qp_eq->fw_handle;
 211                         num_ports--;
 212                 }
 213
 214                 arr[i].adh = adapter->handle;
 215                 arr[i++].fwh = adapter->neq->fw_handle;
 216
 217                 if (adapter->mr.handle) {
 218                         arr[i].adh = adapter->handle;
 219                         arr[i++].fwh = adapter->mr.handle;
 220                 }
 221                 num_adapters--;
 222         }
 223
 224 out_update:
 225         kfree(ehea_fw_handles.arr);
 226         ehea_fw_handles.arr = arr;
 227         ehea_fw_handles.num_entries = i;
 228 out:
 229         mutex_unlock(&ehea_fw_handles.lock);
 230 }
 231
 232 static void ehea_update_bcmc_registrations(void)
 233 {
 234         unsigned long flags;
 235         struct ehea_bcmc_reg_entry *arr = NULL;
 236         struct ehea_adapter *adapter;
 237         struct ehea_mc_list *mc_entry;
 238         int num_registrations = 0;
 239         int i = 0;
 240         int k;
 241
 242         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 243
 244         /* Determine number of registrations */
 245         list_for_each_entry(adapter, &adapter_list, list)
 246                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 247                         struct ehea_port *port = adapter->port[k];
 248
 249                         if (!port || (port->state != EHEA_PORT_UP))
 250                                 continue;
 251
 252                         num_registrations += 2; /* Broadcast registrations */
 253
 254                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 255                                 num_registrations += 2;
 256                 }
 257
 258         if (num_registrations) {
 259                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 260                 if (!arr)
 261                         goto out;  /* Keep the existing array */
 262         } else
 263                 goto out_update;
 264
 265         list_for_each_entry(adapter, &adapter_list, list) {
 266                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 267                         struct ehea_port *port = adapter->port[k];
 268
 269                         if (!port || (port->state != EHEA_PORT_UP))
 270                                 continue;
 271
 272                         if (num_registrations == 0)
 273                                 goto out_update;
 274
 275                         arr[i].adh = adapter->handle;
 276                         arr[i].port_id = port->logical_port_id;
 277                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 278                                           EHEA_BCMC_UNTAGGED;
 279                         arr[i++].macaddr = port->mac_addr;
 280
 281                         arr[i].adh = adapter->handle;
 282                         arr[i].port_id = port->logical_port_id;
 283                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 284                                           EHEA_BCMC_VLANID_ALL;
 285                         arr[i++].macaddr = port->mac_addr;
 286                         num_registrations -= 2;
 287
 288                         list_for_each_entry(mc_entry,
 289                                             &port->mc_list->list, list) {
 290                                 if (num_registrations == 0)
 291                                         goto out_update;
 292
 293                                 arr[i].adh = adapter->handle;
 294                                 arr[i].port_id = port->logical_port_id;
 295                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 296                                                   EHEA_BCMC_UNTAGGED;
 297                                 if (mc_entry->macaddr == 0)
 298                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 299                                 arr[i++].macaddr = mc_entry->macaddr;
 300
 301                                 arr[i].adh = adapter->handle;
 302                                 arr[i].port_id = port->logical_port_id;
 303                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 304                                                   EHEA_BCMC_VLANID_ALL;
 305                                 if (mc_entry->macaddr == 0)
 306                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 307                                 arr[i++].macaddr = mc_entry->macaddr;
 308                                 num_registrations -= 2;
 309                         }
 310                 }
 311         }
 312
 313 out_update:
 314         kfree(ehea_bcmc_regs.arr);
 315         ehea_bcmc_regs.arr = arr;
 316         ehea_bcmc_regs.num_entries = i;
 317 out:
 318         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 319 }
 320
 321 static void ehea_get_stats64(struct net_device *dev,
 322                              struct rtnl_link_stats64 *stats)
 323 {
 324         struct ehea_port *port = netdev_priv(dev);
 325         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 326         int i;
 327
 328         for (i = 0; i < port->num_def_qps; i++) {
 329                 rx_packets += port->port_res[i].rx_packets;
 330                 rx_bytes   += port->port_res[i].rx_bytes;
 331         }
 332
 333         for (i = 0; i < port->num_def_qps; i++) {
 334                 tx_packets += port->port_res[i].tx_packets;
 335                 tx_bytes   += port->port_res[i].tx_bytes;
 336         }
 337
 338         stats->tx_packets = tx_packets;
 339         stats->rx_bytes = rx_bytes;
 340         stats->tx_bytes = tx_bytes;
 341         stats->rx_packets = rx_packets;
 342
 343         stats->multicast = port->stats.multicast;
 344         stats->rx_errors = port->stats.rx_errors;
 345 }
 346
 347 static void ehea_update_stats(struct work_struct *work)
 348 {
 349         struct ehea_port *port =
 350                 container_of(work, struct ehea_port, stats_work.work);
 351         struct net_device *dev = port->netdev;
 352         struct rtnl_link_stats64 *stats = &port->stats;
 353         struct hcp_ehea_port_cb2 *cb2;
 354         u64 hret;
 355
 356         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 357         if (!cb2) {
 358                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 359                 goto resched;
 360         }
 361
 362         hret = ehea_h_query_ehea_port(port->adapter->handle,
 363                                       port->logical_port_id,
 364                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 365         if (hret != H_SUCCESS) {
 366                 netdev_err(dev, "query_ehea_port failed\n");
 367                 goto out_herr;
 368         }
 369
 370         if (netif_msg_hw(port))
 371                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 372
 373         stats->multicast = cb2->rxmcp;
 374         stats->rx_errors = cb2->rxuerr;
 375
 376 out_herr:
 377         free_page((unsigned long)cb2);
 378 resched:
 379         schedule_delayed_work(&port->stats_work,
 380                               round_jiffies_relative(msecs_to_jiffies(1000)));
 381 }
 382
 383 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 384 {
 385         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 386         struct net_device *dev = pr->port->netdev;
 387         int max_index_mask = pr->rq1_skba.len - 1;
 388         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 389         int adder = 0;
 390         int i;
 391
 392         pr->rq1_skba.os_skbs = 0;
 393
 394         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 395                 if (nr_of_wqes > 0)
 396                         pr->rq1_skba.index = index;
 397                 pr->rq1_skba.os_skbs = fill_wqes;
 398                 return;
 399         }
 400
 401         for (i = 0; i < fill_wqes; i++) {
 402                 if (!skb_arr_rq1[index]) {
 403                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 404                                                               EHEA_L_PKT_SIZE);
 405                         if (!skb_arr_rq1[index]) {
 406                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 407                                 break;
 408                         }
 409                 }
 410                 index--;
 411                 index &= max_index_mask;
 412                 adder++;
 413         }
 414
 415         if (adder == 0)
 416                 return;
 417
 418         /* Ring doorbell */
 419         ehea_update_rq1a(pr->qp, adder);
 420 }
 421
 422 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 423 {
 424         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 425         struct net_device *dev = pr->port->netdev;
 426         int i;
 427
 428         if (nr_rq1a > pr->rq1_skba.len) {
 429                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 430                 return;
 431         }
 432
 433         for (i = 0; i < nr_rq1a; i++) {
 434                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 435                 if (!skb_arr_rq1[i])
 436                         break;
 437         }
 438         /* Ring doorbell */
 439         ehea_update_rq1a(pr->qp, i - 1);
 440 }
 441
 442 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 443                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 444                               int num_wqes, int wqe_type, int packet_size)
 445 {
 446         struct net_device *dev = pr->port->netdev;
 447         struct ehea_qp *qp = pr->qp;
 448         struct sk_buff **skb_arr = q_skba->arr;
 449         struct ehea_rwqe *rwqe;
 450         int i, index, max_index_mask, fill_wqes;
 451         int adder = 0;
 452         int ret = 0;
 453
 454         fill_wqes = q_skba->os_skbs + num_wqes;
 455         q_skba->os_skbs = 0;
 456
 457         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 458                 q_skba->os_skbs = fill_wqes;
 459                 return ret;
 460         }
 461
 462         index = q_skba->index;
 463         max_index_mask = q_skba->len - 1;
 464         for (i = 0; i < fill_wqes; i++) {
 465                 u64 tmp_addr;
 466                 struct sk_buff *skb;
 467
 468                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 469                 if (!skb) {
 470                         q_skba->os_skbs = fill_wqes - i;
 471                         if (q_skba->os_skbs == q_skba->len - 2) {
 472                                 netdev_info(pr->port->netdev,
 473                                             "rq%i ran dry - no mem for skb\n",
 474                                             rq_nr);
 475                                 ret = -ENOMEM;
 476                         }
 477                         break;
 478                 }
 479
 480                 skb_arr[index] = skb;
 481                 tmp_addr = ehea_map_vaddr(skb->data);
 482                 if (tmp_addr == -1) {
 483                         dev_consume_skb_any(skb);
 484                         q_skba->os_skbs = fill_wqes - i;
 485                         ret = 0;
 486                         break;
 487                 }
 488
 489                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 490                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 491                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 492                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 493                 rwqe->sg_list[0].vaddr = tmp_addr;
 494                 rwqe->sg_list[0].len = packet_size;
 495                 rwqe->data_segments = 1;
 496
 497                 index++;
 498                 index &= max_index_mask;
 499                 adder++;
 500         }
 501
 502         q_skba->index = index;
 503         if (adder == 0)
 504                 goto out;
 505
 506         /* Ring doorbell */
 507         iosync();
 508         if (rq_nr == 2)
 509                 ehea_update_rq2a(pr->qp, adder);
 510         else
 511                 ehea_update_rq3a(pr->qp, adder);
 512 out:
 513         return ret;
 514 }
 515
 516
 517 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 518 {
 519         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 520                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 521                                   EHEA_RQ2_PKT_SIZE);
 522 }
 523
 524
 525 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 526 {
 527         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 528                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 529                                   EHEA_MAX_PACKET_SIZE);
 530 }
 531
 532 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 533 {
 534         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 535         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 536                 return 0;
 537         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 538             (cqe->header_length == 0))
 539                 return 0;
 540         return -EINVAL;
 541 }
 542
 543 static inline void ehea_fill_skb(struct net_device *dev,
 544                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 545                                  struct ehea_port_res *pr)
 546 {
 547         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 548
 549         skb_put(skb, length);
 550         skb->protocol = eth_type_trans(skb, dev);
 551
 552         /* The packet was not an IPV4 packet so a complemented checksum was
 553            calculated. The value is found in the Internet Checksum field. */
 554         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 555                 skb->ip_summed = CHECKSUM_COMPLETE;
 556                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 557         } else
 558                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 559
 560         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 561 }
 562
 563 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 564                                                int arr_len,
 565                                                struct ehea_cqe *cqe)
 566 {
 567         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 568         struct sk_buff *skb;
 569         void *pref;
 570         int x;
 571
 572         x = skb_index + 1;
 573         x &= (arr_len - 1);
 574
 575         pref = skb_array[x];
 576         if (pref) {
 577                 prefetchw(pref);
 578                 prefetchw(pref + EHEA_CACHE_LINE);
 579
 580                 pref = (skb_array[x]->data);
 581                 prefetch(pref);
 582                 prefetch(pref + EHEA_CACHE_LINE);
 583                 prefetch(pref + EHEA_CACHE_LINE * 2);
 584                 prefetch(pref + EHEA_CACHE_LINE * 3);
 585         }
 586
 587         skb = skb_array[skb_index];
 588         skb_array[skb_index] = NULL;
 589         return skb;
 590 }
 591
 592 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 593                                                   int arr_len, int wqe_index)
 594 {
 595         struct sk_buff *skb;
 596         void *pref;
 597         int x;
 598
 599         x = wqe_index + 1;
 600         x &= (arr_len - 1);
 601
 602         pref = skb_array[x];
 603         if (pref) {
 604                 prefetchw(pref);
 605                 prefetchw(pref + EHEA_CACHE_LINE);
 606
 607                 pref = (skb_array[x]->data);
 608                 prefetchw(pref);
 609                 prefetchw(pref + EHEA_CACHE_LINE);
 610         }
 611
 612         skb = skb_array[wqe_index];
 613         skb_array[wqe_index] = NULL;
 614         return skb;
 615 }
 616
 617 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 618                                  struct ehea_cqe *cqe, int *processed_rq2,
 619                                  int *processed_rq3)
 620 {
 621         struct sk_buff *skb;
 622
 623         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 624                 pr->p_stats.err_tcp_cksum++;
 625         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 626                 pr->p_stats.err_ip_cksum++;
 627         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 628                 pr->p_stats.err_frame_crc++;
 629
 630         if (rq == 2) {
 631                 *processed_rq2 += 1;
 632                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 633                 dev_kfree_skb(skb);
 634         } else if (rq == 3) {
 635                 *processed_rq3 += 1;
 636                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 637                 dev_kfree_skb(skb);
 638         }
 639
 640         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 641                 if (netif_msg_rx_err(pr->port)) {
 642                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 643                                pr->qp->init_attr.qp_nr);
 644                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 645                 }
 646                 ehea_schedule_port_reset(pr->port);
 647                 return 1;
 648         }
 649
 650         return 0;
 651 }
 652
 653 static int ehea_proc_rwqes(struct net_device *dev,
 654                            struct ehea_port_res *pr,
 655                            int budget)
 656 {
 657         struct ehea_port *port = pr->port;
 658         struct ehea_qp *qp = pr->qp;
 659         struct ehea_cqe *cqe;
 660         struct sk_buff *skb;
 661         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 662         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 663         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 664         int skb_arr_rq1_len = pr->rq1_skba.len;
 665         int skb_arr_rq2_len = pr->rq2_skba.len;
 666         int skb_arr_rq3_len = pr->rq3_skba.len;
 667         int processed, processed_rq1, processed_rq2, processed_rq3;
 668         u64 processed_bytes = 0;
 669         int wqe_index, last_wqe_index, rq, port_reset;
 670
 671         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 672         last_wqe_index = 0;
 673
 674         cqe = ehea_poll_rq1(qp, &wqe_index);
 675         while ((processed < budget) && cqe) {
 676                 ehea_inc_rq1(qp);
 677                 processed_rq1++;
 678                 processed++;
 679                 if (netif_msg_rx_status(port))
 680                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 681
 682                 last_wqe_index = wqe_index;
 683                 rmb();
 684                 if (!ehea_check_cqe(cqe, &rq)) {
 685                         if (rq == 1) {
 686                                 /* LL RQ1 */
 687                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 688                                                           skb_arr_rq1_len,
 689                                                           wqe_index);
 690                                 if (unlikely(!skb)) {
 691                                         netif_info(port, rx_err, dev,
 692                                                   "LL rq1: skb=NULL\n");
 693
 694                                         skb = netdev_alloc_skb(dev,
 695                                                                EHEA_L_PKT_SIZE);
 696                                         if (!skb)
 697                                                 break;
 698                                 }
 699                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 700                                                  cqe->num_bytes_transfered - 4);
 701                                 ehea_fill_skb(dev, skb, cqe, pr);
 702                         } else if (rq == 2) {
 703                                 /* RQ2 */
 704                                 skb = get_skb_by_index(skb_arr_rq2,
 705                                                        skb_arr_rq2_len, cqe);
 706                                 if (unlikely(!skb)) {
 707                                         netif_err(port, rx_err, dev,
 708                                                   "rq2: skb=NULL\n");
 709                                         break;
 710                                 }
 711                                 ehea_fill_skb(dev, skb, cqe, pr);
 712                                 processed_rq2++;
 713                         } else {
 714                                 /* RQ3 */
 715                                 skb = get_skb_by_index(skb_arr_rq3,
 716                                                        skb_arr_rq3_len, cqe);
 717                                 if (unlikely(!skb)) {
 718                                         netif_err(port, rx_err, dev,
 719                                                   "rq3: skb=NULL\n");
 720                                         break;
 721                                 }
 722                                 ehea_fill_skb(dev, skb, cqe, pr);
 723                                 processed_rq3++;
 724                         }
 725
 726                         processed_bytes += skb->len;
 727
 728                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 729                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 730                                                        cqe->vlan_tag);
 731
 732                         napi_gro_receive(&pr->napi, skb);
 733                 } else {
 734                         pr->p_stats.poll_receive_errors++;
 735                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 736                                                            &processed_rq2,
 737                                                            &processed_rq3);
 738                         if (port_reset)
 739                                 break;
 740                 }
 741                 cqe = ehea_poll_rq1(qp, &wqe_index);
 742         }
 743
 744         pr->rx_packets += processed;
 745         pr->rx_bytes += processed_bytes;
 746
 747         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 748         ehea_refill_rq2(pr, processed_rq2);
 749         ehea_refill_rq3(pr, processed_rq3);
 750
 751         return processed;
 752 }
 753
 754 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 755
 756 static void reset_sq_restart_flag(struct ehea_port *port)
 757 {
 758         int i;
 759
 760         for (i = 0; i < port->num_def_qps; i++) {
 761                 struct ehea_port_res *pr = &port->port_res[i];
 762                 pr->sq_restart_flag = 0;
 763         }
 764         wake_up(&port->restart_wq);
 765 }
 766
 767 static void check_sqs(struct ehea_port *port)
 768 {
 769         struct ehea_swqe *swqe;
 770         int swqe_index;
 771         int i;
 772
 773         for (i = 0; i < port->num_def_qps; i++) {
 774                 struct ehea_port_res *pr = &port->port_res[i];
 775                 int ret;
 776                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 777                 memset(swqe, 0, SWQE_HEADER_SIZE);
 778                 atomic_dec(&pr->swqe_avail);
 779
 780                 swqe->tx_control |= EHEA_SWQE_PURGE;
 781                 swqe->wr_id = SWQE_RESTART_CHECK;
 782                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 783                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 784                 swqe->immediate_data_length = 80;
 785
 786                 ehea_post_swqe(pr->qp, swqe);
 787
 788                 ret = wait_event_timeout(port->restart_wq,
 789                                          pr->sq_restart_flag == 0,
 790                                          msecs_to_jiffies(100));
 791
 792                 if (!ret) {
 793                         pr_err("HW/SW queues out of sync\n");
 794                         ehea_schedule_port_reset(pr->port);
 795                         return;
 796                 }
 797         }
 798 }
 799
 800
 801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 802 {
 803         struct sk_buff *skb;
 804         struct ehea_cq *send_cq = pr->send_cq;
 805         struct ehea_cqe *cqe;
 806         int quota = my_quota;
 807         int cqe_counter = 0;
 808         int swqe_av = 0;
 809         int index;
 810         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 811                                                 pr - &pr->port->port_res[0]);
 812
 813         cqe = ehea_poll_cq(send_cq);
 814         while (cqe && (quota > 0)) {
 815                 ehea_inc_cq(send_cq);
 816
 817                 cqe_counter++;
 818                 rmb();
 819
 820                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 821                         pr->sq_restart_flag = 1;
 822                         swqe_av++;
 823                         break;
 824                 }
 825
 826                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 827                         pr_err("Bad send completion status=0x%04X\n",
 828                                cqe->status);
 829
 830                         if (netif_msg_tx_err(pr->port))
 831                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 832
 833                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 834                                 pr_err("Resetting port\n");
 835                                 ehea_schedule_port_reset(pr->port);
 836                                 break;
 837                         }
 838                 }
 839
 840                 if (netif_msg_tx_done(pr->port))
 841                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 842
 843                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 844                            == EHEA_SWQE2_TYPE)) {
 845
 846                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 847                         skb = pr->sq_skba.arr[index];
 848                         dev_consume_skb_any(skb);
 849                         pr->sq_skba.arr[index] = NULL;
 850                 }
 851
 852                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 853                 quota--;
 854
 855                 cqe = ehea_poll_cq(send_cq);
 856         }
 857
 858         ehea_update_feca(send_cq, cqe_counter);
 859         atomic_add(swqe_av, &pr->swqe_avail);
 860
 861         if (unlikely(netif_tx_queue_stopped(txq) &&
 862                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 863                 __netif_tx_lock(txq, smp_processor_id());
 864                 if (netif_tx_queue_stopped(txq) &&
 865                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 866                         netif_tx_wake_queue(txq);
 867                 __netif_tx_unlock(txq);
 868         }
 869
 870         wake_up(&pr->port->swqe_avail_wq);
 871
 872         return cqe;
 873 }
 874
 875 #define EHEA_POLL_MAX_CQES 65535
 876
 877 static int ehea_poll(struct napi_struct *napi, int budget)
 878 {
 879         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 880                                                 napi);
 881         struct net_device *dev = pr->port->netdev;
 882         struct ehea_cqe *cqe;
 883         struct ehea_cqe *cqe_skb = NULL;
 884         int wqe_index;
 885         int rx = 0;
 886
 887         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 888         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 889
 890         while (rx != budget) {
 891                 napi_complete(napi);
 892                 ehea_reset_cq_ep(pr->recv_cq);
 893                 ehea_reset_cq_ep(pr->send_cq);
 894                 ehea_reset_cq_n1(pr->recv_cq);
 895                 ehea_reset_cq_n1(pr->send_cq);
 896                 rmb();
 897                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 898                 cqe_skb = ehea_poll_cq(pr->send_cq);
 899
 900                 if (!cqe && !cqe_skb)
 901                         return rx;
 902
 903                 if (!napi_schedule(napi))
 904                         return rx;
 905
 906                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 907                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 908         }
 909
 910         return rx;
 911 }
 912
 913 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 914 {
 915         struct ehea_port_res *pr = param;
 916
 917         napi_schedule(&pr->napi);
 918
 919         return IRQ_HANDLED;
 920 }
 921
 922 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 923 {
 924         struct ehea_port *port = param;
 925         struct ehea_eqe *eqe;
 926         struct ehea_qp *qp;
 927         u32 qp_token;
 928         u64 resource_type, aer, aerr;
 929         int reset_port = 0;
 930
 931         eqe = ehea_poll_eq(port->qp_eq);
 932
 933         while (eqe) {
 934                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 935                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 936                        eqe->entry, qp_token);
 937
 938                 qp = port->port_res[qp_token].qp;
 939
 940                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 941                                                 &aer, &aerr);
 942
 943                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 944                         if ((aer & EHEA_AER_RESET_MASK) ||
 945                             (aerr & EHEA_AERR_RESET_MASK))
 946                                  reset_port = 1;
 947                 } else
 948                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 949
 950                 eqe = ehea_poll_eq(port->qp_eq);
 951         }
 952
 953         if (reset_port) {
 954                 pr_err("Resetting port\n");
 955                 ehea_schedule_port_reset(port);
 956         }
 957
 958         return IRQ_HANDLED;
 959 }
 960
 961 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 962                                        int logical_port)
 963 {
 964         int i;
 965
 966         for (i = 0; i < EHEA_MAX_PORTS; i++)
 967                 if (adapter->port[i])
 968                         if (adapter->port[i]->logical_port_id == logical_port)
 969                                 return adapter->port[i];
 970         return NULL;
 971 }
 972
 973 int ehea_sense_port_attr(struct ehea_port *port)
 974 {
 975         int ret;
 976         u64 hret;
 977         struct hcp_ehea_port_cb0 *cb0;
 978
 979         /* may be called via ehea_neq_tasklet() */
 980         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 981         if (!cb0) {
 982                 pr_err("no mem for cb0\n");
 983                 ret = -ENOMEM;
 984                 goto out;
 985         }
 986
 987         hret = ehea_h_query_ehea_port(port->adapter->handle,
 988                                       port->logical_port_id, H_PORT_CB0,
 989                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 990                                       cb0);
 991         if (hret != H_SUCCESS) {
 992                 ret = -EIO;
 993                 goto out_free;
 994         }
 995
 996         /* MAC address */
 997         port->mac_addr = cb0->port_mac_addr << 16;
 998
 999         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1000                 ret = -EADDRNOTAVAIL;
1001                 goto out_free;
1002         }
1003
1004         /* Port speed */
1005         switch (cb0->port_speed) {
1006         case H_SPEED_10M_H:
1007                 port->port_speed = EHEA_SPEED_10M;
1008                 port->full_duplex = 0;
1009                 break;
1010         case H_SPEED_10M_F:
1011                 port->port_speed = EHEA_SPEED_10M;
1012                 port->full_duplex = 1;
1013                 break;
1014         case H_SPEED_100M_H:
1015                 port->port_speed = EHEA_SPEED_100M;
1016                 port->full_duplex = 0;
1017                 break;
1018         case H_SPEED_100M_F:
1019                 port->port_speed = EHEA_SPEED_100M;
1020                 port->full_duplex = 1;
1021                 break;
1022         case H_SPEED_1G_F:
1023                 port->port_speed = EHEA_SPEED_1G;
1024                 port->full_duplex = 1;
1025                 break;
1026         case H_SPEED_10G_F:
1027                 port->port_speed = EHEA_SPEED_10G;
1028                 port->full_duplex = 1;
1029                 break;
1030         default:
1031                 port->port_speed = 0;
1032                 port->full_duplex = 0;
1033                 break;
1034         }
1035
1036         port->autoneg = 1;
1037         port->num_mcs = cb0->num_default_qps;
1038
1039         /* Number of default QPs */
1040         if (use_mcs)
1041                 port->num_def_qps = cb0->num_default_qps;
1042         else
1043                 port->num_def_qps = 1;
1044
1045         if (!port->num_def_qps) {
1046                 ret = -EINVAL;
1047                 goto out_free;
1048         }
1049
1050         ret = 0;
1051 out_free:
1052         if (ret || netif_msg_probe(port))
1053                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1054         free_page((unsigned long)cb0);
1055 out:
1056         return ret;
1057 }
1058
1059 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1060 {
1061         struct hcp_ehea_port_cb4 *cb4;
1062         u64 hret;
1063         int ret = 0;
1064
1065         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1066         if (!cb4) {
1067                 pr_err("no mem for cb4\n");
1068                 ret = -ENOMEM;
1069                 goto out;
1070         }
1071
1072         cb4->port_speed = port_speed;
1073
1074         netif_carrier_off(port->netdev);
1075
1076         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1077                                        port->logical_port_id,
1078                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1079         if (hret == H_SUCCESS) {
1080                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1081
1082                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1083                                               port->logical_port_id,
1084                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1085                                               cb4);
1086                 if (hret == H_SUCCESS) {
1087                         switch (cb4->port_speed) {
1088                         case H_SPEED_10M_H:
1089                                 port->port_speed = EHEA_SPEED_10M;
1090                                 port->full_duplex = 0;
1091                                 break;
1092                         case H_SPEED_10M_F:
1093                                 port->port_speed = EHEA_SPEED_10M;
1094                                 port->full_duplex = 1;
1095                                 break;
1096                         case H_SPEED_100M_H:
1097                                 port->port_speed = EHEA_SPEED_100M;
1098                                 port->full_duplex = 0;
1099                                 break;
1100                         case H_SPEED_100M_F:
1101                                 port->port_speed = EHEA_SPEED_100M;
1102                                 port->full_duplex = 1;
1103                                 break;
1104                         case H_SPEED_1G_F:
1105                                 port->port_speed = EHEA_SPEED_1G;
1106                                 port->full_duplex = 1;
1107                                 break;
1108                         case H_SPEED_10G_F:
1109                                 port->port_speed = EHEA_SPEED_10G;
1110                                 port->full_duplex = 1;
1111                                 break;
1112                         default:
1113                                 port->port_speed = 0;
1114                                 port->full_duplex = 0;
1115                                 break;
1116                         }
1117                 } else {
1118                         pr_err("Failed sensing port speed\n");
1119                         ret = -EIO;
1120                 }
1121         } else {
1122                 if (hret == H_AUTHORITY) {
1123                         pr_info("Hypervisor denied setting port speed\n");
1124                         ret = -EPERM;
1125                 } else {
1126                         ret = -EIO;
1127                         pr_err("Failed setting port speed\n");
1128                 }
1129         }
1130         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1131                 netif_carrier_on(port->netdev);
1132
1133         free_page((unsigned long)cb4);
1134 out:
1135         return ret;
1136 }
1137
1138 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1139 {
1140         int ret;
1141         u8 ec;
1142         u8 portnum;
1143         struct ehea_port *port;
1144         struct net_device *dev;
1145
1146         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1147         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1148         port = ehea_get_port(adapter, portnum);
1149         if (!port) {
1150                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1151                 return;
1152         }
1153         dev = port->netdev;
1154
1155         switch (ec) {
1156         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1157
1158                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1159                         if (!netif_carrier_ok(dev)) {
1160                                 ret = ehea_sense_port_attr(port);
1161                                 if (ret) {
1162                                         netdev_err(dev, "failed resensing port attributes\n");
1163                                         break;
1164                                 }
1165
1166                                 netif_info(port, link, dev,
1167                                            "Logical port up: %dMbps %s Duplex\n",
1168                                            port->port_speed,
1169                                            port->full_duplex == 1 ?
1170                                            "Full" : "Half");
1171
1172                                 netif_carrier_on(dev);
1173                                 netif_wake_queue(dev);
1174                         }
1175                 } else
1176                         if (netif_carrier_ok(dev)) {
1177                                 netif_info(port, link, dev,
1178                                            "Logical port down\n");
1179                                 netif_carrier_off(dev);
1180                                 netif_tx_disable(dev);
1181                         }
1182
1183                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1184                         port->phy_link = EHEA_PHY_LINK_UP;
1185                         netif_info(port, link, dev,
1186                                    "Physical port up\n");
1187                         if (prop_carrier_state)
1188                                 netif_carrier_on(dev);
1189                 } else {
1190                         port->phy_link = EHEA_PHY_LINK_DOWN;
1191                         netif_info(port, link, dev,
1192                                    "Physical port down\n");
1193                         if (prop_carrier_state)
1194                                 netif_carrier_off(dev);
1195                 }
1196
1197                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1198                         netdev_info(dev,
1199                                     "External switch port is primary port\n");
1200                 else
1201                         netdev_info(dev,
1202                                     "External switch port is backup port\n");
1203
1204                 break;
1205         case EHEA_EC_ADAPTER_MALFUNC:
1206                 netdev_err(dev, "Adapter malfunction\n");
1207                 break;
1208         case EHEA_EC_PORT_MALFUNC:
1209                 netdev_info(dev, "Port malfunction\n");
1210                 netif_carrier_off(dev);
1211                 netif_tx_disable(dev);
1212                 break;
1213         default:
1214                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1215                 break;
1216         }
1217 }
1218
1219 static void ehea_neq_tasklet(struct tasklet_struct *t)
1220 {
1221         struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
1222         struct ehea_eqe *eqe;
1223         u64 event_mask;
1224
1225         eqe = ehea_poll_eq(adapter->neq);
1226         pr_debug("eqe=%p\n", eqe);
1227
1228         while (eqe) {
1229                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1230                 ehea_parse_eqe(adapter, eqe->entry);
1231                 eqe = ehea_poll_eq(adapter->neq);
1232                 pr_debug("next eqe=%p\n", eqe);
1233         }
1234
1235         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1236                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1237                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1238
1239         ehea_h_reset_events(adapter->handle,
1240                             adapter->neq->fw_handle, event_mask);
1241 }
1242
1243 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1244 {
1245         struct ehea_adapter *adapter = param;
1246         tasklet_hi_schedule(&adapter->neq_tasklet);
1247         return IRQ_HANDLED;
1248 }
1249
1250
1251 static int ehea_fill_port_res(struct ehea_port_res *pr)
1252 {
1253         int ret;
1254         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1255
1256         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1257
1258         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1259
1260         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1261
1262         return ret;
1263 }
1264
1265 static int ehea_reg_interrupts(struct net_device *dev)
1266 {
1267         struct ehea_port *port = netdev_priv(dev);
1268         struct ehea_port_res *pr;
1269         int i, ret;
1270
1271
1272         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1273                  dev->name);
1274
1275         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1276                                   ehea_qp_aff_irq_handler,
1277                                   0, port->int_aff_name, port);
1278         if (ret) {
1279                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1280                            port->qp_eq->attr.ist1);
1281                 goto out_free_qpeq;
1282         }
1283
1284         netif_info(port, ifup, dev,
1285                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1286                    port->qp_eq->attr.ist1);
1287
1288
1289         for (i = 0; i < port->num_def_qps; i++) {
1290                 pr = &port->port_res[i];
1291                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1292                          "%s-queue%d", dev->name, i);
1293                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1294                                           ehea_recv_irq_handler,
1295                                           0, pr->int_send_name, pr);
1296                 if (ret) {
1297                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1298                                    i, pr->eq->attr.ist1);
1299                         goto out_free_req;
1300                 }
1301                 netif_info(port, ifup, dev,
1302                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1303                            pr->eq->attr.ist1, i);
1304         }
1305 out:
1306         return ret;
1307
1308
1309 out_free_req:
1310         while (--i >= 0) {
1311                 u32 ist = port->port_res[i].eq->attr.ist1;
1312                 ibmebus_free_irq(ist, &port->port_res[i]);
1313         }
1314
1315 out_free_qpeq:
1316         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1317         i = port->num_def_qps;
1318
1319         goto out;
1320
1321 }
1322
1323 static void ehea_free_interrupts(struct net_device *dev)
1324 {
1325         struct ehea_port *port = netdev_priv(dev);
1326         struct ehea_port_res *pr;
1327         int i;
1328
1329         /* send */
1330
1331         for (i = 0; i < port->num_def_qps; i++) {
1332                 pr = &port->port_res[i];
1333                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1334                 netif_info(port, intr, dev,
1335                            "free send irq for res %d with handle 0x%X\n",
1336                            i, pr->eq->attr.ist1);
1337         }
1338
1339         /* associated events */
1340         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1341         netif_info(port, intr, dev,
1342                    "associated event interrupt for handle 0x%X freed\n",
1343                    port->qp_eq->attr.ist1);
1344 }
1345
1346 static int ehea_configure_port(struct ehea_port *port)
1347 {
1348         int ret, i;
1349         u64 hret, mask;
1350         struct hcp_ehea_port_cb0 *cb0;
1351
1352         ret = -ENOMEM;
1353         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1354         if (!cb0)
1355                 goto out;
1356
1357         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1358                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1359                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1360                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1361                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1362                                       PXLY_RC_VLAN_FILTER)
1363                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1364
1365         for (i = 0; i < port->num_mcs; i++)
1366                 if (use_mcs)
1367                         cb0->default_qpn_arr[i] =
1368                                 port->port_res[i].qp->init_attr.qp_nr;
1369                 else
1370                         cb0->default_qpn_arr[i] =
1371                                 port->port_res[0].qp->init_attr.qp_nr;
1372
1373         if (netif_msg_ifup(port))
1374                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1375
1376         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1377              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1378
1379         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1380                                        port->logical_port_id,
1381                                        H_PORT_CB0, mask, cb0);
1382         ret = -EIO;
1383         if (hret != H_SUCCESS)
1384                 goto out_free;
1385
1386         ret = 0;
1387
1388 out_free:
1389         free_page((unsigned long)cb0);
1390 out:
1391         return ret;
1392 }
1393
1394 static int ehea_gen_smrs(struct ehea_port_res *pr)
1395 {
1396         int ret;
1397         struct ehea_adapter *adapter = pr->port->adapter;
1398
1399         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1400         if (ret)
1401                 goto out;
1402
1403         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1404         if (ret)
1405                 goto out_free;
1406
1407         return 0;
1408
1409 out_free:
1410         ehea_rem_mr(&pr->send_mr);
1411 out:
1412         pr_err("Generating SMRS failed\n");
1413         return -EIO;
1414 }
1415
1416 static int ehea_rem_smrs(struct ehea_port_res *pr)
1417 {
1418         if ((ehea_rem_mr(&pr->send_mr)) ||
1419             (ehea_rem_mr(&pr->recv_mr)))
1420                 return -EIO;
1421         else
1422                 return 0;
1423 }
1424
1425 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1426 {
1427         int arr_size = sizeof(void *) * max_q_entries;
1428
1429         q_skba->arr = vzalloc(arr_size);
1430         if (!q_skba->arr)
1431                 return -ENOMEM;
1432
1433         q_skba->len = max_q_entries;
1434         q_skba->index = 0;
1435         q_skba->os_skbs = 0;
1436
1437         return 0;
1438 }
1439
1440 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1441                               struct port_res_cfg *pr_cfg, int queue_token)
1442 {
1443         struct ehea_adapter *adapter = port->adapter;
1444         enum ehea_eq_type eq_type = EHEA_EQ;
1445         struct ehea_qp_init_attr *init_attr = NULL;
1446         int ret = -EIO;
1447         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1448
1449         tx_bytes = pr->tx_bytes;
1450         tx_packets = pr->tx_packets;
1451         rx_bytes = pr->rx_bytes;
1452         rx_packets = pr->rx_packets;
1453
1454         memset(pr, 0, sizeof(struct ehea_port_res));
1455
1456         pr->tx_bytes = tx_bytes;
1457         pr->tx_packets = tx_packets;
1458         pr->rx_bytes = rx_bytes;
1459         pr->rx_packets = rx_packets;
1460
1461         pr->port = port;
1462
1463         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1464         if (!pr->eq) {
1465                 pr_err("create_eq failed (eq)\n");
1466                 goto out_free;
1467         }
1468
1469         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1470                                      pr->eq->fw_handle,
1471                                      port->logical_port_id);
1472         if (!pr->recv_cq) {
1473                 pr_err("create_cq failed (cq_recv)\n");
1474                 goto out_free;
1475         }
1476
1477         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1478                                      pr->eq->fw_handle,
1479                                      port->logical_port_id);
1480         if (!pr->send_cq) {
1481                 pr_err("create_cq failed (cq_send)\n");
1482                 goto out_free;
1483         }
1484
1485         if (netif_msg_ifup(port))
1486                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1487                         pr->send_cq->attr.act_nr_of_cqes,
1488                         pr->recv_cq->attr.act_nr_of_cqes);
1489
1490         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1491         if (!init_attr) {
1492                 ret = -ENOMEM;
1493                 pr_err("no mem for ehea_qp_init_attr\n");
1494                 goto out_free;
1495         }
1496
1497         init_attr->low_lat_rq1 = 1;
1498         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1499         init_attr->rq_count = 3;
1500         init_attr->qp_token = queue_token;
1501         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1502         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1503         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1504         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1505         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1506         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1507         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1508         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1509         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1510         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1511         init_attr->port_nr = port->logical_port_id;
1512         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1513         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1514         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1515
1516         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1517         if (!pr->qp) {
1518                 pr_err("create_qp failed\n");
1519                 ret = -EIO;
1520                 goto out_free;
1521         }
1522
1523         if (netif_msg_ifup(port))
1524                 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",
1525                         init_attr->qp_nr,
1526                         init_attr->act_nr_send_wqes,
1527                         init_attr->act_nr_rwqes_rq1,
1528                         init_attr->act_nr_rwqes_rq2,
1529                         init_attr->act_nr_rwqes_rq3);
1530
1531         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1532
1533         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1534         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1535         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1536         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1537         if (ret)
1538                 goto out_free;
1539
1540         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1541         if (ehea_gen_smrs(pr) != 0) {
1542                 ret = -EIO;
1543                 goto out_free;
1544         }
1545
1546         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1547
1548         kfree(init_attr);
1549
1550         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll);
1551
1552         ret = 0;
1553         goto out;
1554
1555 out_free:
1556         kfree(init_attr);
1557         vfree(pr->sq_skba.arr);
1558         vfree(pr->rq1_skba.arr);
1559         vfree(pr->rq2_skba.arr);
1560         vfree(pr->rq3_skba.arr);
1561         ehea_destroy_qp(pr->qp);
1562         ehea_destroy_cq(pr->send_cq);
1563         ehea_destroy_cq(pr->recv_cq);
1564         ehea_destroy_eq(pr->eq);
1565 out:
1566         return ret;
1567 }
1568
1569 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1570 {
1571         int ret, i;
1572
1573         if (pr->qp)
1574                 netif_napi_del(&pr->napi);
1575
1576         ret = ehea_destroy_qp(pr->qp);
1577
1578         if (!ret) {
1579                 ehea_destroy_cq(pr->send_cq);
1580                 ehea_destroy_cq(pr->recv_cq);
1581                 ehea_destroy_eq(pr->eq);
1582
1583                 for (i = 0; i < pr->rq1_skba.len; i++)
1584                         dev_kfree_skb(pr->rq1_skba.arr[i]);
1585
1586                 for (i = 0; i < pr->rq2_skba.len; i++)
1587                         dev_kfree_skb(pr->rq2_skba.arr[i]);
1588
1589                 for (i = 0; i < pr->rq3_skba.len; i++)
1590                         dev_kfree_skb(pr->rq3_skba.arr[i]);
1591
1592                 for (i = 0; i < pr->sq_skba.len; 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 = skb_tcp_all_headers(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         eth_hw_addr_set(dev, mac_addr->sa_data);
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                 return -ENOMEM;
2626
2627         for (i = 0; i < (port->num_def_qps); i++) {
2628                 struct ehea_port_res *pr =  &port->port_res[i];
2629                 struct ehea_qp *qp = pr->qp;
2630
2631                 ret = ehea_gen_smrs(pr);
2632                 if (ret) {
2633                         netdev_err(dev, "creation of shared memory regions failed\n");
2634                         goto out;
2635                 }
2636
2637                 ehea_update_rqs(qp, pr);
2638
2639                 /* Enable queue pair */
2640                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2641                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2642                                             cb0);
2643                 if (hret != H_SUCCESS) {
2644                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2645                         ret = -EFAULT;
2646                         goto out;
2647                 }
2648
2649                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2650                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2651
2652                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2653                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2654                                                             1), cb0, &dummy64,
2655                                              &dummy64, &dummy16, &dummy16);
2656                 if (hret != H_SUCCESS) {
2657                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2658                         ret = -EFAULT;
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                         ret = -EFAULT;
2668                         goto out;
2669                 }
2670
2671                 /* refill entire queue */
2672                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2673                 ehea_refill_rq2(pr, 0);
2674                 ehea_refill_rq3(pr, 0);
2675         }
2676 out:
2677         free_page((unsigned long)cb0);
2678
2679         return ret;
2680 }
2681
2682 static void ehea_reset_port(struct work_struct *work)
2683 {
2684         int ret;
2685         struct ehea_port *port =
2686                 container_of(work, struct ehea_port, reset_task);
2687         struct net_device *dev = port->netdev;
2688
2689         mutex_lock(&dlpar_mem_lock);
2690         port->resets++;
2691         mutex_lock(&port->port_lock);
2692         netif_tx_disable(dev);
2693
2694         port_napi_disable(port);
2695
2696         ehea_down(dev);
2697
2698         ret = ehea_up(dev);
2699         if (ret)
2700                 goto out;
2701
2702         ehea_set_multicast_list(dev);
2703
2704         netif_info(port, timer, dev, "reset successful\n");
2705
2706         port_napi_enable(port);
2707
2708         netif_tx_wake_all_queues(dev);
2709 out:
2710         mutex_unlock(&port->port_lock);
2711         mutex_unlock(&dlpar_mem_lock);
2712 }
2713
2714 static void ehea_rereg_mrs(void)
2715 {
2716         int ret, i;
2717         struct ehea_adapter *adapter;
2718
2719         pr_info("LPAR memory changed - re-initializing driver\n");
2720
2721         list_for_each_entry(adapter, &adapter_list, list)
2722                 if (adapter->active_ports) {
2723                         /* Shutdown all ports */
2724                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2725                                 struct ehea_port *port = adapter->port[i];
2726                                 struct net_device *dev;
2727
2728                                 if (!port)
2729                                         continue;
2730
2731                                 dev = port->netdev;
2732
2733                                 if (dev->flags & IFF_UP) {
2734                                         mutex_lock(&port->port_lock);
2735                                         netif_tx_disable(dev);
2736                                         ehea_flush_sq(port);
2737                                         ret = ehea_stop_qps(dev);
2738                                         if (ret) {
2739                                                 mutex_unlock(&port->port_lock);
2740                                                 goto out;
2741                                         }
2742                                         port_napi_disable(port);
2743                                         mutex_unlock(&port->port_lock);
2744                                 }
2745                                 reset_sq_restart_flag(port);
2746                         }
2747
2748                         /* Unregister old memory region */
2749                         ret = ehea_rem_mr(&adapter->mr);
2750                         if (ret) {
2751                                 pr_err("unregister MR failed - driver inoperable!\n");
2752                                 goto out;
2753                         }
2754                 }
2755
2756         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2757
2758         list_for_each_entry(adapter, &adapter_list, list)
2759                 if (adapter->active_ports) {
2760                         /* Register new memory region */
2761                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2762                         if (ret) {
2763                                 pr_err("register MR failed - driver inoperable!\n");
2764                                 goto out;
2765                         }
2766
2767                         /* Restart all ports */
2768                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2769                                 struct ehea_port *port = adapter->port[i];
2770
2771                                 if (port) {
2772                                         struct net_device *dev = port->netdev;
2773
2774                                         if (dev->flags & IFF_UP) {
2775                                                 mutex_lock(&port->port_lock);
2776                                                 ret = ehea_restart_qps(dev);
2777                                                 if (!ret) {
2778                                                         check_sqs(port);
2779                                                         port_napi_enable(port);
2780                                                         netif_tx_wake_all_queues(dev);
2781                                                 } else {
2782                                                         netdev_err(dev, "Unable to restart QPS\n");
2783                                                 }
2784                                                 mutex_unlock(&port->port_lock);
2785                                         }
2786                                 }
2787                         }
2788                 }
2789         pr_info("re-initializing driver complete\n");
2790 out:
2791         return;
2792 }
2793
2794 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)
2795 {
2796         struct ehea_port *port = netdev_priv(dev);
2797
2798         if (netif_carrier_ok(dev) &&
2799             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2800                 ehea_schedule_port_reset(port);
2801 }
2802
2803 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2804 {
2805         struct hcp_query_ehea *cb;
2806         u64 hret;
2807         int ret;
2808
2809         cb = (void *)get_zeroed_page(GFP_KERNEL);
2810         if (!cb) {
2811                 ret = -ENOMEM;
2812                 goto out;
2813         }
2814
2815         hret = ehea_h_query_ehea(adapter->handle, cb);
2816
2817         if (hret != H_SUCCESS) {
2818                 ret = -EIO;
2819                 goto out_herr;
2820         }
2821
2822         adapter->max_mc_mac = cb->max_mc_mac - 1;
2823         ret = 0;
2824
2825 out_herr:
2826         free_page((unsigned long)cb);
2827 out:
2828         return ret;
2829 }
2830
2831 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2832 {
2833         struct hcp_ehea_port_cb4 *cb4;
2834         u64 hret;
2835         int ret = 0;
2836
2837         *jumbo = 0;
2838
2839         /* (Try to) enable *jumbo frames */
2840         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2841         if (!cb4) {
2842                 pr_err("no mem for cb4\n");
2843                 ret = -ENOMEM;
2844                 goto out;
2845         } else {
2846                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2847                                               port->logical_port_id,
2848                                               H_PORT_CB4,
2849                                               H_PORT_CB4_JUMBO, cb4);
2850                 if (hret == H_SUCCESS) {
2851                         if (cb4->jumbo_frame)
2852                                 *jumbo = 1;
2853                         else {
2854                                 cb4->jumbo_frame = 1;
2855                                 hret = ehea_h_modify_ehea_port(port->adapter->
2856                                                                handle,
2857                                                                port->
2858                                                                logical_port_id,
2859                                                                H_PORT_CB4,
2860                                                                H_PORT_CB4_JUMBO,
2861                                                                cb4);
2862                                 if (hret == H_SUCCESS)
2863                                         *jumbo = 1;
2864                         }
2865                 } else
2866                         ret = -EINVAL;
2867
2868                 free_page((unsigned long)cb4);
2869         }
2870 out:
2871         return ret;
2872 }
2873
2874 static ssize_t log_port_id_show(struct device *dev,
2875                                 struct device_attribute *attr, char *buf)
2876 {
2877         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2878         return sprintf(buf, "%d", port->logical_port_id);
2879 }
2880
2881 static DEVICE_ATTR_RO(log_port_id);
2882
2883 static void logical_port_release(struct device *dev)
2884 {
2885         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2886         of_node_put(port->ofdev.dev.of_node);
2887 }
2888
2889 static struct device *ehea_register_port(struct ehea_port *port,
2890                                          struct device_node *dn)
2891 {
2892         int ret;
2893
2894         port->ofdev.dev.of_node = of_node_get(dn);
2895         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2896         port->ofdev.dev.bus = &ibmebus_bus_type;
2897
2898         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2899         port->ofdev.dev.release = logical_port_release;
2900
2901         ret = of_device_register(&port->ofdev);
2902         if (ret) {
2903                 pr_err("failed to register device. ret=%d\n", ret);
2904                 put_device(&port->ofdev.dev);
2905                 goto out;
2906         }
2907
2908         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2909         if (ret) {
2910                 pr_err("failed to register attributes, ret=%d\n", ret);
2911                 goto out_unreg_of_dev;
2912         }
2913
2914         return &port->ofdev.dev;
2915
2916 out_unreg_of_dev:
2917         of_device_unregister(&port->ofdev);
2918 out:
2919         return NULL;
2920 }
2921
2922 static void ehea_unregister_port(struct ehea_port *port)
2923 {
2924         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2925         of_device_unregister(&port->ofdev);
2926 }
2927
2928 static const struct net_device_ops ehea_netdev_ops = {
2929         .ndo_open               = ehea_open,
2930         .ndo_stop               = ehea_stop,
2931         .ndo_start_xmit         = ehea_start_xmit,
2932         .ndo_get_stats64        = ehea_get_stats64,
2933         .ndo_set_mac_address    = ehea_set_mac_addr,
2934         .ndo_validate_addr      = eth_validate_addr,
2935         .ndo_set_rx_mode        = ehea_set_multicast_list,
2936         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2937         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2938         .ndo_tx_timeout         = ehea_tx_watchdog,
2939 };
2940
2941 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2942                                          u32 logical_port_id,
2943                                          struct device_node *dn)
2944 {
2945         int ret;
2946         struct net_device *dev;
2947         struct ehea_port *port;
2948         struct device *port_dev;
2949         int jumbo;
2950
2951         /* allocate memory for the port structures */
2952         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2953
2954         if (!dev) {
2955                 ret = -ENOMEM;
2956                 goto out_err;
2957         }
2958
2959         port = netdev_priv(dev);
2960
2961         mutex_init(&port->port_lock);
2962         port->state = EHEA_PORT_DOWN;
2963         port->sig_comp_iv = sq_entries / 10;
2964
2965         port->adapter = adapter;
2966         port->netdev = dev;
2967         port->logical_port_id = logical_port_id;
2968
2969         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2970
2971         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2972         if (!port->mc_list) {
2973                 ret = -ENOMEM;
2974                 goto out_free_ethdev;
2975         }
2976
2977         INIT_LIST_HEAD(&port->mc_list->list);
2978
2979         ret = ehea_sense_port_attr(port);
2980         if (ret)
2981                 goto out_free_mc_list;
2982
2983         netif_set_real_num_rx_queues(dev, port->num_def_qps);
2984         netif_set_real_num_tx_queues(dev, port->num_def_qps);
2985
2986         port_dev = ehea_register_port(port, dn);
2987         if (!port_dev)
2988                 goto out_free_mc_list;
2989
2990         SET_NETDEV_DEV(dev, port_dev);
2991
2992         /* initialize net_device structure */
2993         eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
2994
2995         dev->netdev_ops = &ehea_netdev_ops;
2996         ehea_set_ethtool_ops(dev);
2997
2998         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2999                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3000         dev->features = NETIF_F_SG | NETIF_F_TSO |
3001                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3002                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3003                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3004         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3005                         NETIF_F_IP_CSUM;
3006         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3007
3008         /* MTU range: 68 - 9022 */
3009         dev->min_mtu = ETH_MIN_MTU;
3010         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3011
3012         INIT_WORK(&port->reset_task, ehea_reset_port);
3013         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3014
3015         init_waitqueue_head(&port->swqe_avail_wq);
3016         init_waitqueue_head(&port->restart_wq);
3017
3018         ret = register_netdev(dev);
3019         if (ret) {
3020                 pr_err("register_netdev failed. ret=%d\n", ret);
3021                 goto out_unreg_port;
3022         }
3023
3024         ret = ehea_get_jumboframe_status(port, &jumbo);
3025         if (ret)
3026                 netdev_err(dev, "failed determining jumbo frame status\n");
3027
3028         netdev_info(dev, "Jumbo frames are %sabled\n",
3029                     jumbo == 1 ? "en" : "dis");
3030
3031         adapter->active_ports++;
3032
3033         return port;
3034
3035 out_unreg_port:
3036         ehea_unregister_port(port);
3037
3038 out_free_mc_list:
3039         kfree(port->mc_list);
3040
3041 out_free_ethdev:
3042         free_netdev(dev);
3043
3044 out_err:
3045         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3046                logical_port_id, ret);
3047         return NULL;
3048 }
3049
3050 static void ehea_shutdown_single_port(struct ehea_port *port)
3051 {
3052         struct ehea_adapter *adapter = port->adapter;
3053
3054         cancel_work_sync(&port->reset_task);
3055         cancel_delayed_work_sync(&port->stats_work);
3056         unregister_netdev(port->netdev);
3057         ehea_unregister_port(port);
3058         kfree(port->mc_list);
3059         free_netdev(port->netdev);
3060         adapter->active_ports--;
3061 }
3062
3063 static int ehea_setup_ports(struct ehea_adapter *adapter)
3064 {
3065         struct device_node *lhea_dn;
3066         struct device_node *eth_dn;
3067
3068         const u32 *dn_log_port_id;
3069         int i = 0;
3070
3071         lhea_dn = adapter->ofdev->dev.of_node;
3072         for_each_child_of_node(lhea_dn, eth_dn) {
3073                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3074                                                  NULL);
3075                 if (!dn_log_port_id) {
3076                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3077                         continue;
3078                 }
3079
3080                 if (ehea_add_adapter_mr(adapter)) {
3081                         pr_err("creating MR failed\n");
3082                         of_node_put(eth_dn);
3083                         return -EIO;
3084                 }
3085
3086                 adapter->port[i] = ehea_setup_single_port(adapter,
3087                                                           *dn_log_port_id,
3088                                                           eth_dn);
3089                 if (adapter->port[i])
3090                         netdev_info(adapter->port[i]->netdev,
3091                                     "logical port id #%d\n", *dn_log_port_id);
3092                 else
3093                         ehea_remove_adapter_mr(adapter);
3094
3095                 i++;
3096         }
3097         return 0;
3098 }
3099
3100 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3101                                            u32 logical_port_id)
3102 {
3103         struct device_node *lhea_dn;
3104         struct device_node *eth_dn;
3105         const u32 *dn_log_port_id;
3106
3107         lhea_dn = adapter->ofdev->dev.of_node;
3108         for_each_child_of_node(lhea_dn, eth_dn) {
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 probe_port_store(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 remove_port_store(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_WO(probe_port);
3210 static DEVICE_ATTR_WO(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                 fallthrough;    /* 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_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
3425
3426         ret = ehea_create_device_sysfs(dev);
3427         if (ret)
3428                 goto out_kill_eq;
3429
3430         ret = ehea_setup_ports(adapter);
3431         if (ret) {
3432                 dev_err(&dev->dev, "setup_ports failed\n");
3433                 goto out_rem_dev_sysfs;
3434         }
3435
3436         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3437                                   ehea_interrupt_neq, 0,
3438                                   "ehea_neq", adapter);
3439         if (ret) {
3440                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3441                 goto out_shutdown_ports;
3442         }
3443
3444         /* Handle any events that might be pending. */
3445         tasklet_hi_schedule(&adapter->neq_tasklet);
3446
3447         ret = 0;
3448         goto out;
3449
3450 out_shutdown_ports:
3451         for (i = 0; i < EHEA_MAX_PORTS; i++)
3452                 if (adapter->port[i]) {
3453                         ehea_shutdown_single_port(adapter->port[i]);
3454                         adapter->port[i] = NULL;
3455                 }
3456
3457 out_rem_dev_sysfs:
3458         ehea_remove_device_sysfs(dev);
3459
3460 out_kill_eq:
3461         ehea_destroy_eq(adapter->neq);
3462
3463 out_free_ad:
3464         list_del(&adapter->list);
3465
3466 out:
3467         ehea_update_firmware_handles();
3468
3469         return ret;
3470 }
3471
3472 static void ehea_remove(struct platform_device *dev)
3473 {
3474         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3475         int i;
3476
3477         for (i = 0; i < EHEA_MAX_PORTS; i++)
3478                 if (adapter->port[i]) {
3479                         ehea_shutdown_single_port(adapter->port[i]);
3480                         adapter->port[i] = NULL;
3481                 }
3482
3483         ehea_remove_device_sysfs(dev);
3484
3485         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3486         tasklet_kill(&adapter->neq_tasklet);
3487
3488         ehea_destroy_eq(adapter->neq);
3489         ehea_remove_adapter_mr(adapter);
3490         list_del(&adapter->list);
3491
3492         ehea_update_firmware_handles();
3493 }
3494
3495 static int check_module_parm(void)
3496 {
3497         int ret = 0;
3498
3499         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3500             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3501                 pr_info("Bad parameter: rq1_entries\n");
3502                 ret = -EINVAL;
3503         }
3504         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3505             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3506                 pr_info("Bad parameter: rq2_entries\n");
3507                 ret = -EINVAL;
3508         }
3509         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3510             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3511                 pr_info("Bad parameter: rq3_entries\n");
3512                 ret = -EINVAL;
3513         }
3514         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3515             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3516                 pr_info("Bad parameter: sq_entries\n");
3517                 ret = -EINVAL;
3518         }
3519
3520         return ret;
3521 }
3522
3523 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3524 {
3525         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3526 }
3527
3528 static DRIVER_ATTR_RO(capabilities);
3529
3530 static int __init ehea_module_init(void)
3531 {
3532         int ret;
3533
3534         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3535
3536         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3537         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3538
3539         mutex_init(&ehea_fw_handles.lock);
3540         spin_lock_init(&ehea_bcmc_regs.lock);
3541
3542         ret = check_module_parm();
3543         if (ret)
3544                 goto out;
3545
3546         ret = ibmebus_register_driver(&ehea_driver);
3547         if (ret) {
3548                 pr_err("failed registering eHEA device driver on ebus\n");
3549                 goto out;
3550         }
3551
3552         ret = driver_create_file(&ehea_driver.driver,
3553                                  &driver_attr_capabilities);
3554         if (ret) {
3555                 pr_err("failed to register capabilities attribute, ret=%d\n",
3556                        ret);
3557                 goto out2;
3558         }
3559
3560         return ret;
3561
3562 out2:
3563         ibmebus_unregister_driver(&ehea_driver);
3564 out:
3565         return ret;
3566 }
3567
3568 static void __exit ehea_module_exit(void)
3569 {
3570         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3571         ibmebus_unregister_driver(&ehea_driver);
3572         ehea_unregister_memory_hooks();
3573         kfree(ehea_fw_handles.arr);
3574         kfree(ehea_bcmc_regs.arr);
3575         ehea_destroy_busmap();
3576 }
3577
3578 module_init(ehea_module_init);
3579 module_exit(ehea_module_exit);